2728 lines
93 KiB
Diff
2728 lines
93 KiB
Diff
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--- python/branches/py3k/Modules/audioop.c 2009/05/16 01:46:11 72674
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+++ python/branches/py3k/Modules/audioop.c 2010/05/09 15:52:27 81032
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@@ -53,13 +53,13 @@
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static PyInt16
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search(PyInt16 val, PyInt16 *table, int size)
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{
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- int i;
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+ int i;
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- for (i = 0; i < size; i++) {
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- if (val <= *table++)
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- return (i);
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- }
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- return (size);
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+ for (i = 0; i < size; i++) {
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+ if (val <= *table++)
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+ return (i);
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+ }
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+ return (size);
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}
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#define st_ulaw2linear16(uc) (_st_ulaw2linear16[uc])
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#define st_alaw2linear16(uc) (_st_alaw2linear16[uc])
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@@ -83,7 +83,7 @@
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-228, -212, -196, -180, -164, -148, -132,
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-120, -112, -104, -96, -88, -80, -72,
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-64, -56, -48, -40, -32, -24, -16,
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- -8, 0, 32124, 31100, 30076, 29052, 28028,
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+ -8, 0, 32124, 31100, 30076, 29052, 28028,
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27004, 25980, 24956, 23932, 22908, 21884, 20860,
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||
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19836, 18812, 17788, 16764, 15996, 15484, 14972,
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14460, 13948, 13436, 12924, 12412, 11900, 11388,
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@@ -100,8 +100,8 @@
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372, 356, 340, 324, 308, 292, 276,
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260, 244, 228, 212, 196, 180, 164,
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148, 132, 120, 112, 104, 96, 88,
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- 80, 72, 64, 56, 48, 40, 32,
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- 24, 16, 8, 0
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+ 80, 72, 64, 56, 48, 40, 32,
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+ 24, 16, 8, 0
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};
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/*
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@@ -137,39 +137,39 @@
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* John Wiley & Sons, pps 98-111 and 472-476.
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*/
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static unsigned char
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-st_14linear2ulaw(PyInt16 pcm_val) /* 2's complement (14-bit range) */
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+st_14linear2ulaw(PyInt16 pcm_val) /* 2's complement (14-bit range) */
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{
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- PyInt16 mask;
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- PyInt16 seg;
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- unsigned char uval;
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-
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- /* The original sox code does this in the calling function, not here */
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- pcm_val = pcm_val >> 2;
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-
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- /* u-law inverts all bits */
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- /* Get the sign and the magnitude of the value. */
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- if (pcm_val < 0) {
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- pcm_val = -pcm_val;
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- mask = 0x7F;
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- } else {
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- mask = 0xFF;
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- }
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- if ( pcm_val > CLIP ) pcm_val = CLIP; /* clip the magnitude */
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- pcm_val += (BIAS >> 2);
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-
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- /* Convert the scaled magnitude to segment number. */
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- seg = search(pcm_val, seg_uend, 8);
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-
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- /*
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- * Combine the sign, segment, quantization bits;
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- * and complement the code word.
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- */
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- if (seg >= 8) /* out of range, return maximum value. */
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- return (unsigned char) (0x7F ^ mask);
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- else {
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- uval = (unsigned char) (seg << 4) | ((pcm_val >> (seg + 1)) & 0xF);
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- return (uval ^ mask);
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- }
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+ PyInt16 mask;
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+ PyInt16 seg;
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+ unsigned char uval;
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+
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+ /* The original sox code does this in the calling function, not here */
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+ pcm_val = pcm_val >> 2;
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+
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+ /* u-law inverts all bits */
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||
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+ /* Get the sign and the magnitude of the value. */
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+ if (pcm_val < 0) {
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+ pcm_val = -pcm_val;
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+ mask = 0x7F;
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+ } else {
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+ mask = 0xFF;
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+ }
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+ if ( pcm_val > CLIP ) pcm_val = CLIP; /* clip the magnitude */
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+ pcm_val += (BIAS >> 2);
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+
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+ /* Convert the scaled magnitude to segment number. */
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+ seg = search(pcm_val, seg_uend, 8);
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+
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+ /*
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+ * Combine the sign, segment, quantization bits;
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+ * and complement the code word.
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+ */
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+ if (seg >= 8) /* out of range, return maximum value. */
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+ return (unsigned char) (0x7F ^ mask);
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+ else {
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+ uval = (unsigned char) (seg << 4) | ((pcm_val >> (seg + 1)) & 0xF);
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+ return (uval ^ mask);
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+ }
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}
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@@ -234,59 +234,59 @@
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* John Wiley & Sons, pps 98-111 and 472-476.
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*/
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static unsigned char
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-st_linear2alaw(PyInt16 pcm_val) /* 2's complement (13-bit range) */
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+st_linear2alaw(PyInt16 pcm_val) /* 2's complement (13-bit range) */
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{
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- PyInt16 mask;
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- short seg;
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- unsigned char aval;
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-
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- /* The original sox code does this in the calling function, not here */
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- pcm_val = pcm_val >> 3;
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-
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- /* A-law using even bit inversion */
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- if (pcm_val >= 0) {
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- mask = 0xD5; /* sign (7th) bit = 1 */
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- } else {
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- mask = 0x55; /* sign bit = 0 */
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- pcm_val = -pcm_val - 1;
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- }
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-
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- /* Convert the scaled magnitude to segment number. */
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- seg = search(pcm_val, seg_aend, 8);
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||
|
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-
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||
|
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- /* Combine the sign, segment, and quantization bits. */
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||
|
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-
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|
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- if (seg >= 8) /* out of range, return maximum value. */
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|
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- return (unsigned char) (0x7F ^ mask);
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- else {
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|
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- aval = (unsigned char) seg << SEG_SHIFT;
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- if (seg < 2)
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- aval |= (pcm_val >> 1) & QUANT_MASK;
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- else
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|
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- aval |= (pcm_val >> seg) & QUANT_MASK;
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- return (aval ^ mask);
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- }
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+ PyInt16 mask;
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+ short seg;
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|
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+ unsigned char aval;
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+
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+ /* The original sox code does this in the calling function, not here */
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||
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+ pcm_val = pcm_val >> 3;
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+
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+ /* A-law using even bit inversion */
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|
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+ if (pcm_val >= 0) {
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||
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+ mask = 0xD5; /* sign (7th) bit = 1 */
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|
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+ } else {
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+ mask = 0x55; /* sign bit = 0 */
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+ pcm_val = -pcm_val - 1;
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||
|
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+ }
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+
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+ /* Convert the scaled magnitude to segment number. */
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||
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+ seg = search(pcm_val, seg_aend, 8);
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||
|
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+
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||
|
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+ /* Combine the sign, segment, and quantization bits. */
|
||
|
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+
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||
|
|
+ if (seg >= 8) /* out of range, return maximum value. */
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||
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+ return (unsigned char) (0x7F ^ mask);
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+ else {
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+ aval = (unsigned char) seg << SEG_SHIFT;
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|
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+ if (seg < 2)
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|
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+ aval |= (pcm_val >> 1) & QUANT_MASK;
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+ else
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+ aval |= (pcm_val >> seg) & QUANT_MASK;
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|
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+ return (aval ^ mask);
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|
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+ }
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}
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/* End of code taken from sox */
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|
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|
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/* Intel ADPCM step variation table */
|
||
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static int indexTable[16] = {
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- -1, -1, -1, -1, 2, 4, 6, 8,
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|
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- -1, -1, -1, -1, 2, 4, 6, 8,
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+ -1, -1, -1, -1, 2, 4, 6, 8,
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+ -1, -1, -1, -1, 2, 4, 6, 8,
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|
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};
|
||
|
|
|
||
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static int stepsizeTable[89] = {
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- 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
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- 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
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- 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
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|
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- 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
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|
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- 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
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|
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- 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
|
||
|
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- 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
|
||
|
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- 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
|
||
|
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- 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
|
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|
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+ 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
|
||
|
|
+ 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
|
||
|
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+ 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
|
||
|
|
+ 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
|
||
|
|
+ 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
|
||
|
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+ 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
|
||
|
|
+ 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
|
||
|
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+ 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
|
||
|
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+ 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
|
||
|
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};
|
||
|
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-
|
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+
|
||
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#define CHARP(cp, i) ((signed char *)(cp+i))
|
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|
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#define SHORTP(cp, i) ((short *)(cp+i))
|
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|
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#define LONGP(cp, i) ((Py_Int32 *)(cp+i))
|
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|
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@@ -298,137 +298,137 @@
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|
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static PyObject *
|
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audioop_getsample(PyObject *self, PyObject *args)
|
||
|
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{
|
||
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- signed char *cp;
|
||
|
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- int len, size, val = 0;
|
||
|
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- int i;
|
||
|
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-
|
||
|
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- if ( !PyArg_ParseTuple(args, "s#ii:getsample", &cp, &len, &size, &i) )
|
||
|
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- return 0;
|
||
|
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- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
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- return 0;
|
||
|
|
- }
|
||
|
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- if ( i < 0 || i >= len/size ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Index out of range");
|
||
|
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- return 0;
|
||
|
|
- }
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i*2);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i*4);
|
||
|
|
- return PyLong_FromLong(val);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#ii:getsample", &cp, &len, &size, &i) )
|
||
|
|
+ return 0;
|
||
|
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+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ if ( i < 0 || i >= len/size ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Index out of range");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i*2);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i*4);
|
||
|
|
+ return PyLong_FromLong(val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_max(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- int i;
|
||
|
|
- int max = 0;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:max", &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- for ( i=0; i<len; i+= size) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
- if ( val < 0 ) val = (-val);
|
||
|
|
- if ( val > max ) max = val;
|
||
|
|
- }
|
||
|
|
- return PyLong_FromLong(max);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ int i;
|
||
|
|
+ int max = 0;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:max", &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ for ( i=0; i<len; i+= size) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+ if ( val < 0 ) val = (-val);
|
||
|
|
+ if ( val > max ) max = val;
|
||
|
|
+ }
|
||
|
|
+ return PyLong_FromLong(max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_minmax(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- int i;
|
||
|
|
- int min = 0x7fffffff, max = -0x7fffffff;
|
||
|
|
-
|
||
|
|
- if (!PyArg_ParseTuple(args, "s#i:minmax", &cp, &len, &size))
|
||
|
|
- return NULL;
|
||
|
|
- if (size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- for (i = 0; i < len; i += size) {
|
||
|
|
- if (size == 1) val = (int) *CHARP(cp, i);
|
||
|
|
- else if (size == 2) val = (int) *SHORTP(cp, i);
|
||
|
|
- else if (size == 4) val = (int) *LONGP(cp, i);
|
||
|
|
- if (val > max) max = val;
|
||
|
|
- if (val < min) min = val;
|
||
|
|
- }
|
||
|
|
- return Py_BuildValue("(ii)", min, max);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ int i;
|
||
|
|
+ int min = 0x7fffffff, max = -0x7fffffff;
|
||
|
|
+
|
||
|
|
+ if (!PyArg_ParseTuple(args, "s#i:minmax", &cp, &len, &size))
|
||
|
|
+ return NULL;
|
||
|
|
+ if (size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ for (i = 0; i < len; i += size) {
|
||
|
|
+ if (size == 1) val = (int) *CHARP(cp, i);
|
||
|
|
+ else if (size == 2) val = (int) *SHORTP(cp, i);
|
||
|
|
+ else if (size == 4) val = (int) *LONGP(cp, i);
|
||
|
|
+ if (val > max) max = val;
|
||
|
|
+ if (val < min) min = val;
|
||
|
|
+ }
|
||
|
|
+ return Py_BuildValue("(ii)", min, max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_avg(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- int i;
|
||
|
|
- double avg = 0.0;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:avg", &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- for ( i=0; i<len; i+= size) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
- avg += val;
|
||
|
|
- }
|
||
|
|
- if ( len == 0 )
|
||
|
|
- val = 0;
|
||
|
|
- else
|
||
|
|
- val = (int)(avg / (double)(len/size));
|
||
|
|
- return PyLong_FromLong(val);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ int i;
|
||
|
|
+ double avg = 0.0;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:avg", &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ for ( i=0; i<len; i+= size) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+ avg += val;
|
||
|
|
+ }
|
||
|
|
+ if ( len == 0 )
|
||
|
|
+ val = 0;
|
||
|
|
+ else
|
||
|
|
+ val = (int)(avg / (double)(len/size));
|
||
|
|
+ return PyLong_FromLong(val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_rms(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- int i;
|
||
|
|
- double sum_squares = 0.0;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:rms", &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- for ( i=0; i<len; i+= size) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
- sum_squares += (double)val*(double)val;
|
||
|
|
- }
|
||
|
|
- if ( len == 0 )
|
||
|
|
- val = 0;
|
||
|
|
- else
|
||
|
|
- val = (int)sqrt(sum_squares / (double)(len/size));
|
||
|
|
- return PyLong_FromLong(val);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ int i;
|
||
|
|
+ double sum_squares = 0.0;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:rms", &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ for ( i=0; i<len; i+= size) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+ sum_squares += (double)val*(double)val;
|
||
|
|
+ }
|
||
|
|
+ if ( len == 0 )
|
||
|
|
+ val = 0;
|
||
|
|
+ else
|
||
|
|
+ val = (int)sqrt(sum_squares / (double)(len/size));
|
||
|
|
+ return PyLong_FromLong(val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static double _sum2(short *a, short *b, int len)
|
||
|
|
{
|
||
|
|
- int i;
|
||
|
|
- double sum = 0.0;
|
||
|
|
+ int i;
|
||
|
|
+ double sum = 0.0;
|
||
|
|
|
||
|
|
- for( i=0; i<len; i++) {
|
||
|
|
- sum = sum + (double)a[i]*(double)b[i];
|
||
|
|
- }
|
||
|
|
- return sum;
|
||
|
|
+ for( i=0; i<len; i++) {
|
||
|
|
+ sum = sum + (double)a[i]*(double)b[i];
|
||
|
|
+ }
|
||
|
|
+ return sum;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
@@ -466,60 +466,60 @@
|
||
|
|
static PyObject *
|
||
|
|
audioop_findfit(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- short *cp1, *cp2;
|
||
|
|
- int len1, len2;
|
||
|
|
- int j, best_j;
|
||
|
|
- double aj_m1, aj_lm1;
|
||
|
|
- double sum_ri_2, sum_aij_2, sum_aij_ri, result, best_result, factor;
|
||
|
|
-
|
||
|
|
- /* Passing a short** for an 's' argument is correct only
|
||
|
|
- if the string contents is aligned for interpretation
|
||
|
|
- as short[]. Due to the definition of PyBytesObject,
|
||
|
|
- this is currently (Python 2.6) the case. */
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#s#:findfit",
|
||
|
|
- (char**)&cp1, &len1, (char**)&cp2, &len2) )
|
||
|
|
- return 0;
|
||
|
|
- if ( len1 & 1 || len2 & 1 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Strings should be even-sized");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- len1 >>= 1;
|
||
|
|
- len2 >>= 1;
|
||
|
|
-
|
||
|
|
- if ( len1 < len2 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "First sample should be longer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- sum_ri_2 = _sum2(cp2, cp2, len2);
|
||
|
|
- sum_aij_2 = _sum2(cp1, cp1, len2);
|
||
|
|
- sum_aij_ri = _sum2(cp1, cp2, len2);
|
||
|
|
-
|
||
|
|
- result = (sum_ri_2*sum_aij_2 - sum_aij_ri*sum_aij_ri) / sum_aij_2;
|
||
|
|
-
|
||
|
|
- best_result = result;
|
||
|
|
- best_j = 0;
|
||
|
|
- j = 0;
|
||
|
|
-
|
||
|
|
- for ( j=1; j<=len1-len2; j++) {
|
||
|
|
- aj_m1 = (double)cp1[j-1];
|
||
|
|
- aj_lm1 = (double)cp1[j+len2-1];
|
||
|
|
-
|
||
|
|
- sum_aij_2 = sum_aij_2 + aj_lm1*aj_lm1 - aj_m1*aj_m1;
|
||
|
|
- sum_aij_ri = _sum2(cp1+j, cp2, len2);
|
||
|
|
-
|
||
|
|
- result = (sum_ri_2*sum_aij_2 - sum_aij_ri*sum_aij_ri)
|
||
|
|
- / sum_aij_2;
|
||
|
|
-
|
||
|
|
- if ( result < best_result ) {
|
||
|
|
- best_result = result;
|
||
|
|
- best_j = j;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
+ short *cp1, *cp2;
|
||
|
|
+ int len1, len2;
|
||
|
|
+ int j, best_j;
|
||
|
|
+ double aj_m1, aj_lm1;
|
||
|
|
+ double sum_ri_2, sum_aij_2, sum_aij_ri, result, best_result, factor;
|
||
|
|
+
|
||
|
|
+ /* Passing a short** for an 's' argument is correct only
|
||
|
|
+ if the string contents is aligned for interpretation
|
||
|
|
+ as short[]. Due to the definition of PyBytesObject,
|
||
|
|
+ this is currently (Python 2.6) the case. */
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#s#:findfit",
|
||
|
|
+ (char**)&cp1, &len1, (char**)&cp2, &len2) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( len1 & 1 || len2 & 1 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Strings should be even-sized");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ len1 >>= 1;
|
||
|
|
+ len2 >>= 1;
|
||
|
|
+
|
||
|
|
+ if ( len1 < len2 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "First sample should be longer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ sum_ri_2 = _sum2(cp2, cp2, len2);
|
||
|
|
+ sum_aij_2 = _sum2(cp1, cp1, len2);
|
||
|
|
+ sum_aij_ri = _sum2(cp1, cp2, len2);
|
||
|
|
+
|
||
|
|
+ result = (sum_ri_2*sum_aij_2 - sum_aij_ri*sum_aij_ri) / sum_aij_2;
|
||
|
|
+
|
||
|
|
+ best_result = result;
|
||
|
|
+ best_j = 0;
|
||
|
|
+ j = 0;
|
||
|
|
+
|
||
|
|
+ for ( j=1; j<=len1-len2; j++) {
|
||
|
|
+ aj_m1 = (double)cp1[j-1];
|
||
|
|
+ aj_lm1 = (double)cp1[j+len2-1];
|
||
|
|
+
|
||
|
|
+ sum_aij_2 = sum_aij_2 + aj_lm1*aj_lm1 - aj_m1*aj_m1;
|
||
|
|
+ sum_aij_ri = _sum2(cp1+j, cp2, len2);
|
||
|
|
+
|
||
|
|
+ result = (sum_ri_2*sum_aij_2 - sum_aij_ri*sum_aij_ri)
|
||
|
|
+ / sum_aij_2;
|
||
|
|
+
|
||
|
|
+ if ( result < best_result ) {
|
||
|
|
+ best_result = result;
|
||
|
|
+ best_j = j;
|
||
|
|
}
|
||
|
|
|
||
|
|
- factor = _sum2(cp1+best_j, cp2, len2) / sum_ri_2;
|
||
|
|
-
|
||
|
|
- return Py_BuildValue("(if)", best_j, factor);
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ factor = _sum2(cp1+best_j, cp2, len2) / sum_ri_2;
|
||
|
|
+
|
||
|
|
+ return Py_BuildValue("(if)", best_j, factor);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
@@ -529,28 +529,28 @@
|
||
|
|
static PyObject *
|
||
|
|
audioop_findfactor(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- short *cp1, *cp2;
|
||
|
|
- int len1, len2;
|
||
|
|
- double sum_ri_2, sum_aij_ri, result;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#s#:findfactor",
|
||
|
|
- (char**)&cp1, &len1, (char**)&cp2, &len2) )
|
||
|
|
- return 0;
|
||
|
|
- if ( len1 & 1 || len2 & 1 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Strings should be even-sized");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- if ( len1 != len2 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Samples should be same size");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- len2 >>= 1;
|
||
|
|
- sum_ri_2 = _sum2(cp2, cp2, len2);
|
||
|
|
- sum_aij_ri = _sum2(cp1, cp2, len2);
|
||
|
|
+ short *cp1, *cp2;
|
||
|
|
+ int len1, len2;
|
||
|
|
+ double sum_ri_2, sum_aij_ri, result;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#s#:findfactor",
|
||
|
|
+ (char**)&cp1, &len1, (char**)&cp2, &len2) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( len1 & 1 || len2 & 1 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Strings should be even-sized");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ if ( len1 != len2 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Samples should be same size");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ len2 >>= 1;
|
||
|
|
+ sum_ri_2 = _sum2(cp2, cp2, len2);
|
||
|
|
+ sum_aij_ri = _sum2(cp1, cp2, len2);
|
||
|
|
|
||
|
|
- result = sum_aij_ri / sum_ri_2;
|
||
|
|
+ result = sum_aij_ri / sum_ri_2;
|
||
|
|
|
||
|
|
- return PyFloat_FromDouble(result);
|
||
|
|
+ return PyFloat_FromDouble(result);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
@@ -560,1114 +560,1114 @@
|
||
|
|
static PyObject *
|
||
|
|
audioop_findmax(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- short *cp1;
|
||
|
|
- int len1, len2;
|
||
|
|
- int j, best_j;
|
||
|
|
- double aj_m1, aj_lm1;
|
||
|
|
- double result, best_result;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:findmax",
|
||
|
|
- (char**)&cp1, &len1, &len2) )
|
||
|
|
- return 0;
|
||
|
|
- if ( len1 & 1 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Strings should be even-sized");
|
||
|
|
- return 0;
|
||
|
|
+ short *cp1;
|
||
|
|
+ int len1, len2;
|
||
|
|
+ int j, best_j;
|
||
|
|
+ double aj_m1, aj_lm1;
|
||
|
|
+ double result, best_result;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:findmax",
|
||
|
|
+ (char**)&cp1, &len1, &len2) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( len1 & 1 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Strings should be even-sized");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ len1 >>= 1;
|
||
|
|
+
|
||
|
|
+ if ( len2 < 0 || len1 < len2 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Input sample should be longer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ result = _sum2(cp1, cp1, len2);
|
||
|
|
+
|
||
|
|
+ best_result = result;
|
||
|
|
+ best_j = 0;
|
||
|
|
+ j = 0;
|
||
|
|
+
|
||
|
|
+ for ( j=1; j<=len1-len2; j++) {
|
||
|
|
+ aj_m1 = (double)cp1[j-1];
|
||
|
|
+ aj_lm1 = (double)cp1[j+len2-1];
|
||
|
|
+
|
||
|
|
+ result = result + aj_lm1*aj_lm1 - aj_m1*aj_m1;
|
||
|
|
+
|
||
|
|
+ if ( result > best_result ) {
|
||
|
|
+ best_result = result;
|
||
|
|
+ best_j = j;
|
||
|
|
}
|
||
|
|
- len1 >>= 1;
|
||
|
|
-
|
||
|
|
- if ( len2 < 0 || len1 < len2 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Input sample should be longer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- result = _sum2(cp1, cp1, len2);
|
||
|
|
|
||
|
|
- best_result = result;
|
||
|
|
- best_j = 0;
|
||
|
|
- j = 0;
|
||
|
|
-
|
||
|
|
- for ( j=1; j<=len1-len2; j++) {
|
||
|
|
- aj_m1 = (double)cp1[j-1];
|
||
|
|
- aj_lm1 = (double)cp1[j+len2-1];
|
||
|
|
-
|
||
|
|
- result = result + aj_lm1*aj_lm1 - aj_m1*aj_m1;
|
||
|
|
-
|
||
|
|
- if ( result > best_result ) {
|
||
|
|
- best_result = result;
|
||
|
|
- best_j = j;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- }
|
||
|
|
+ }
|
||
|
|
|
||
|
|
- return PyLong_FromLong(best_j);
|
||
|
|
+ return PyLong_FromLong(best_j);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_avgpp(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0, prevval = 0, prevextremevalid = 0,
|
||
|
|
- prevextreme = 0;
|
||
|
|
- int i;
|
||
|
|
- double avg = 0.0;
|
||
|
|
- int diff, prevdiff, extremediff, nextreme = 0;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:avgpp", &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- /* Compute first delta value ahead. Also automatically makes us
|
||
|
|
- ** skip the first extreme value
|
||
|
|
- */
|
||
|
|
- if ( size == 1 ) prevval = (int)*CHARP(cp, 0);
|
||
|
|
- else if ( size == 2 ) prevval = (int)*SHORTP(cp, 0);
|
||
|
|
- else if ( size == 4 ) prevval = (int)*LONGP(cp, 0);
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, size);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, size);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, size);
|
||
|
|
- prevdiff = val - prevval;
|
||
|
|
-
|
||
|
|
- for ( i=size; i<len; i+= size) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
- diff = val - prevval;
|
||
|
|
- if ( diff*prevdiff < 0 ) {
|
||
|
|
- /* Derivative changed sign. Compute difference to last
|
||
|
|
- ** extreme value and remember.
|
||
|
|
- */
|
||
|
|
- if ( prevextremevalid ) {
|
||
|
|
- extremediff = prevval - prevextreme;
|
||
|
|
- if ( extremediff < 0 )
|
||
|
|
- extremediff = -extremediff;
|
||
|
|
- avg += extremediff;
|
||
|
|
- nextreme++;
|
||
|
|
- }
|
||
|
|
- prevextremevalid = 1;
|
||
|
|
- prevextreme = prevval;
|
||
|
|
- }
|
||
|
|
- prevval = val;
|
||
|
|
- if ( diff != 0 )
|
||
|
|
- prevdiff = diff;
|
||
|
|
- }
|
||
|
|
- if ( nextreme == 0 )
|
||
|
|
- val = 0;
|
||
|
|
- else
|
||
|
|
- val = (int)(avg / (double)nextreme);
|
||
|
|
- return PyLong_FromLong(val);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0, prevval = 0, prevextremevalid = 0,
|
||
|
|
+ prevextreme = 0;
|
||
|
|
+ int i;
|
||
|
|
+ double avg = 0.0;
|
||
|
|
+ int diff, prevdiff, extremediff, nextreme = 0;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:avgpp", &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ /* Compute first delta value ahead. Also automatically makes us
|
||
|
|
+ ** skip the first extreme value
|
||
|
|
+ */
|
||
|
|
+ if ( size == 1 ) prevval = (int)*CHARP(cp, 0);
|
||
|
|
+ else if ( size == 2 ) prevval = (int)*SHORTP(cp, 0);
|
||
|
|
+ else if ( size == 4 ) prevval = (int)*LONGP(cp, 0);
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, size);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, size);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, size);
|
||
|
|
+ prevdiff = val - prevval;
|
||
|
|
+
|
||
|
|
+ for ( i=size; i<len; i+= size) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+ diff = val - prevval;
|
||
|
|
+ if ( diff*prevdiff < 0 ) {
|
||
|
|
+ /* Derivative changed sign. Compute difference to last
|
||
|
|
+ ** extreme value and remember.
|
||
|
|
+ */
|
||
|
|
+ if ( prevextremevalid ) {
|
||
|
|
+ extremediff = prevval - prevextreme;
|
||
|
|
+ if ( extremediff < 0 )
|
||
|
|
+ extremediff = -extremediff;
|
||
|
|
+ avg += extremediff;
|
||
|
|
+ nextreme++;
|
||
|
|
+ }
|
||
|
|
+ prevextremevalid = 1;
|
||
|
|
+ prevextreme = prevval;
|
||
|
|
+ }
|
||
|
|
+ prevval = val;
|
||
|
|
+ if ( diff != 0 )
|
||
|
|
+ prevdiff = diff;
|
||
|
|
+ }
|
||
|
|
+ if ( nextreme == 0 )
|
||
|
|
+ val = 0;
|
||
|
|
+ else
|
||
|
|
+ val = (int)(avg / (double)nextreme);
|
||
|
|
+ return PyLong_FromLong(val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_maxpp(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0, prevval = 0, prevextremevalid = 0,
|
||
|
|
- prevextreme = 0;
|
||
|
|
- int i;
|
||
|
|
- int max = 0;
|
||
|
|
- int diff, prevdiff, extremediff;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:maxpp", &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- /* Compute first delta value ahead. Also automatically makes us
|
||
|
|
- ** skip the first extreme value
|
||
|
|
- */
|
||
|
|
- if ( size == 1 ) prevval = (int)*CHARP(cp, 0);
|
||
|
|
- else if ( size == 2 ) prevval = (int)*SHORTP(cp, 0);
|
||
|
|
- else if ( size == 4 ) prevval = (int)*LONGP(cp, 0);
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, size);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, size);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, size);
|
||
|
|
- prevdiff = val - prevval;
|
||
|
|
-
|
||
|
|
- for ( i=size; i<len; i+= size) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
- diff = val - prevval;
|
||
|
|
- if ( diff*prevdiff < 0 ) {
|
||
|
|
- /* Derivative changed sign. Compute difference to
|
||
|
|
- ** last extreme value and remember.
|
||
|
|
- */
|
||
|
|
- if ( prevextremevalid ) {
|
||
|
|
- extremediff = prevval - prevextreme;
|
||
|
|
- if ( extremediff < 0 )
|
||
|
|
- extremediff = -extremediff;
|
||
|
|
- if ( extremediff > max )
|
||
|
|
- max = extremediff;
|
||
|
|
- }
|
||
|
|
- prevextremevalid = 1;
|
||
|
|
- prevextreme = prevval;
|
||
|
|
- }
|
||
|
|
- prevval = val;
|
||
|
|
- if ( diff != 0 )
|
||
|
|
- prevdiff = diff;
|
||
|
|
- }
|
||
|
|
- return PyLong_FromLong(max);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0, prevval = 0, prevextremevalid = 0,
|
||
|
|
+ prevextreme = 0;
|
||
|
|
+ int i;
|
||
|
|
+ int max = 0;
|
||
|
|
+ int diff, prevdiff, extremediff;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:maxpp", &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ /* Compute first delta value ahead. Also automatically makes us
|
||
|
|
+ ** skip the first extreme value
|
||
|
|
+ */
|
||
|
|
+ if ( size == 1 ) prevval = (int)*CHARP(cp, 0);
|
||
|
|
+ else if ( size == 2 ) prevval = (int)*SHORTP(cp, 0);
|
||
|
|
+ else if ( size == 4 ) prevval = (int)*LONGP(cp, 0);
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, size);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, size);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, size);
|
||
|
|
+ prevdiff = val - prevval;
|
||
|
|
+
|
||
|
|
+ for ( i=size; i<len; i+= size) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+ diff = val - prevval;
|
||
|
|
+ if ( diff*prevdiff < 0 ) {
|
||
|
|
+ /* Derivative changed sign. Compute difference to
|
||
|
|
+ ** last extreme value and remember.
|
||
|
|
+ */
|
||
|
|
+ if ( prevextremevalid ) {
|
||
|
|
+ extremediff = prevval - prevextreme;
|
||
|
|
+ if ( extremediff < 0 )
|
||
|
|
+ extremediff = -extremediff;
|
||
|
|
+ if ( extremediff > max )
|
||
|
|
+ max = extremediff;
|
||
|
|
+ }
|
||
|
|
+ prevextremevalid = 1;
|
||
|
|
+ prevextreme = prevval;
|
||
|
|
+ }
|
||
|
|
+ prevval = val;
|
||
|
|
+ if ( diff != 0 )
|
||
|
|
+ prevdiff = diff;
|
||
|
|
+ }
|
||
|
|
+ return PyLong_FromLong(max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_cross(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- int i;
|
||
|
|
- int prevval, ncross;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:cross", &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- ncross = -1;
|
||
|
|
- prevval = 17; /* Anything <> 0,1 */
|
||
|
|
- for ( i=0; i<len; i+= size) {
|
||
|
|
- if ( size == 1 ) val = ((int)*CHARP(cp, i)) >> 7;
|
||
|
|
- else if ( size == 2 ) val = ((int)*SHORTP(cp, i)) >> 15;
|
||
|
|
- else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 31;
|
||
|
|
- val = val & 1;
|
||
|
|
- if ( val != prevval ) ncross++;
|
||
|
|
- prevval = val;
|
||
|
|
- }
|
||
|
|
- return PyLong_FromLong(ncross);
|
||
|
|
+ signed char *cp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ int i;
|
||
|
|
+ int prevval, ncross;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:cross", &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ ncross = -1;
|
||
|
|
+ prevval = 17; /* Anything <> 0,1 */
|
||
|
|
+ for ( i=0; i<len; i+= size) {
|
||
|
|
+ if ( size == 1 ) val = ((int)*CHARP(cp, i)) >> 7;
|
||
|
|
+ else if ( size == 2 ) val = ((int)*SHORTP(cp, i)) >> 15;
|
||
|
|
+ else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 31;
|
||
|
|
+ val = val & 1;
|
||
|
|
+ if ( val != prevval ) ncross++;
|
||
|
|
+ prevval = val;
|
||
|
|
+ }
|
||
|
|
+ return PyLong_FromLong(ncross);
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_mul(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp, *ncp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- double factor, fval, maxval;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#id:mul", &cp, &len, &size, &factor ) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) maxval = (double) 0x7f;
|
||
|
|
- else if ( size == 2 ) maxval = (double) 0x7fff;
|
||
|
|
- else if ( size == 4 ) maxval = (double) 0x7fffffff;
|
||
|
|
- else {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
- fval = (double)val*factor;
|
||
|
|
- if ( fval > maxval ) fval = maxval;
|
||
|
|
- else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
- val = (int)fval;
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i) = (signed char)val;
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i) = (short)val;
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)val;
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp, *ncp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ double factor, fval, maxval;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#id:mul", &cp, &len, &size, &factor ) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) maxval = (double) 0x7f;
|
||
|
|
+ else if ( size == 2 ) maxval = (double) 0x7fff;
|
||
|
|
+ else if ( size == 4 ) maxval = (double) 0x7fffffff;
|
||
|
|
+ else {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+ fval = (double)val*factor;
|
||
|
|
+ if ( fval > maxval ) fval = maxval;
|
||
|
|
+ else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
+ val = (int)fval;
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i) = (signed char)val;
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i) = (short)val;
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)val;
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_tomono(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- Py_buffer pcp;
|
||
|
|
- signed char *cp, *ncp;
|
||
|
|
- int len, size, val1 = 0, val2 = 0;
|
||
|
|
- double fac1, fac2, fval, maxval;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s*idd:tomono",
|
||
|
|
- &pcp, &size, &fac1, &fac2 ) )
|
||
|
|
- return 0;
|
||
|
|
- cp = pcp.buf;
|
||
|
|
- len = pcp.len;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) maxval = (double) 0x7f;
|
||
|
|
- else if ( size == 2 ) maxval = (double) 0x7fff;
|
||
|
|
- else if ( size == 4 ) maxval = (double) 0x7fffffff;
|
||
|
|
- else {
|
||
|
|
- PyBuffer_Release(&pcp);
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len/2);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size*2 ) {
|
||
|
|
- if ( size == 1 ) val1 = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val1 = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val1 = (int)*LONGP(cp, i);
|
||
|
|
- if ( size == 1 ) val2 = (int)*CHARP(cp, i+1);
|
||
|
|
- else if ( size == 2 ) val2 = (int)*SHORTP(cp, i+2);
|
||
|
|
- else if ( size == 4 ) val2 = (int)*LONGP(cp, i+4);
|
||
|
|
- fval = (double)val1*fac1 + (double)val2*fac2;
|
||
|
|
- if ( fval > maxval ) fval = maxval;
|
||
|
|
- else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
- val1 = (int)fval;
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i/2) = (signed char)val1;
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i/2) = (short)val1;
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i/2)= (Py_Int32)val1;
|
||
|
|
- }
|
||
|
|
- PyBuffer_Release(&pcp);
|
||
|
|
- return rv;
|
||
|
|
+ Py_buffer pcp;
|
||
|
|
+ signed char *cp, *ncp;
|
||
|
|
+ int len, size, val1 = 0, val2 = 0;
|
||
|
|
+ double fac1, fac2, fval, maxval;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s*idd:tomono",
|
||
|
|
+ &pcp, &size, &fac1, &fac2 ) )
|
||
|
|
+ return 0;
|
||
|
|
+ cp = pcp.buf;
|
||
|
|
+ len = pcp.len;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) maxval = (double) 0x7f;
|
||
|
|
+ else if ( size == 2 ) maxval = (double) 0x7fff;
|
||
|
|
+ else if ( size == 4 ) maxval = (double) 0x7fffffff;
|
||
|
|
+ else {
|
||
|
|
+ PyBuffer_Release(&pcp);
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len/2);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size*2 ) {
|
||
|
|
+ if ( size == 1 ) val1 = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val1 = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val1 = (int)*LONGP(cp, i);
|
||
|
|
+ if ( size == 1 ) val2 = (int)*CHARP(cp, i+1);
|
||
|
|
+ else if ( size == 2 ) val2 = (int)*SHORTP(cp, i+2);
|
||
|
|
+ else if ( size == 4 ) val2 = (int)*LONGP(cp, i+4);
|
||
|
|
+ fval = (double)val1*fac1 + (double)val2*fac2;
|
||
|
|
+ if ( fval > maxval ) fval = maxval;
|
||
|
|
+ else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
+ val1 = (int)fval;
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i/2) = (signed char)val1;
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i/2) = (short)val1;
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i/2)= (Py_Int32)val1;
|
||
|
|
+ }
|
||
|
|
+ PyBuffer_Release(&pcp);
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_tostereo(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp, *ncp;
|
||
|
|
- int len, new_len, size, val1, val2, val = 0;
|
||
|
|
- double fac1, fac2, fval, maxval;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#idd:tostereo",
|
||
|
|
- &cp, &len, &size, &fac1, &fac2 ) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) maxval = (double) 0x7f;
|
||
|
|
- else if ( size == 2 ) maxval = (double) 0x7fff;
|
||
|
|
- else if ( size == 4 ) maxval = (double) 0x7fffffff;
|
||
|
|
- else {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- new_len = len*2;
|
||
|
|
- if (new_len < 0) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
+ signed char *cp, *ncp;
|
||
|
|
+ int len, new_len, size, val1, val2, val = 0;
|
||
|
|
+ double fac1, fac2, fval, maxval;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#idd:tostereo",
|
||
|
|
+ &cp, &len, &size, &fac1, &fac2 ) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) maxval = (double) 0x7f;
|
||
|
|
+ else if ( size == 2 ) maxval = (double) 0x7fff;
|
||
|
|
+ else if ( size == 4 ) maxval = (double) 0x7fffffff;
|
||
|
|
+ else {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ new_len = len*2;
|
||
|
|
+ if (new_len < 0) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
-
|
||
|
|
- fval = (double)val*fac1;
|
||
|
|
- if ( fval > maxval ) fval = maxval;
|
||
|
|
- else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
- val1 = (int)fval;
|
||
|
|
-
|
||
|
|
- fval = (double)val*fac2;
|
||
|
|
- if ( fval > maxval ) fval = maxval;
|
||
|
|
- else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
- val2 = (int)fval;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i*2) = (signed char)val1;
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i*2) = (short)val1;
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i*2) = (Py_Int32)val1;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i*2+1) = (signed char)val2;
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i*2+2) = (short)val2;
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i*2+4) = (Py_Int32)val2;
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+
|
||
|
|
+ fval = (double)val*fac1;
|
||
|
|
+ if ( fval > maxval ) fval = maxval;
|
||
|
|
+ else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
+ val1 = (int)fval;
|
||
|
|
+
|
||
|
|
+ fval = (double)val*fac2;
|
||
|
|
+ if ( fval > maxval ) fval = maxval;
|
||
|
|
+ else if ( fval < -maxval ) fval = -maxval;
|
||
|
|
+ val2 = (int)fval;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i*2) = (signed char)val1;
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i*2) = (short)val1;
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i*2) = (Py_Int32)val1;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i*2+1) = (signed char)val2;
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i*2+2) = (short)val2;
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i*2+4) = (Py_Int32)val2;
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_add(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp1, *cp2, *ncp;
|
||
|
|
- int len1, len2, size, val1 = 0, val2 = 0, maxval, newval;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#s#i:add",
|
||
|
|
- &cp1, &len1, &cp2, &len2, &size ) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( len1 != len2 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Lengths should be the same");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) maxval = 0x7f;
|
||
|
|
- else if ( size == 2 ) maxval = 0x7fff;
|
||
|
|
- else if ( size == 4 ) maxval = 0x7fffffff;
|
||
|
|
- else {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len1);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len1; i += size ) {
|
||
|
|
- if ( size == 1 ) val1 = (int)*CHARP(cp1, i);
|
||
|
|
- else if ( size == 2 ) val1 = (int)*SHORTP(cp1, i);
|
||
|
|
- else if ( size == 4 ) val1 = (int)*LONGP(cp1, i);
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) val2 = (int)*CHARP(cp2, i);
|
||
|
|
- else if ( size == 2 ) val2 = (int)*SHORTP(cp2, i);
|
||
|
|
- else if ( size == 4 ) val2 = (int)*LONGP(cp2, i);
|
||
|
|
-
|
||
|
|
- newval = val1 + val2;
|
||
|
|
- /* truncate in case of overflow */
|
||
|
|
- if (newval > maxval) newval = maxval;
|
||
|
|
- else if (newval < -maxval) newval = -maxval;
|
||
|
|
- else if (size == 4 && (newval^val1) < 0 && (newval^val2) < 0)
|
||
|
|
- newval = val1 > 0 ? maxval : - maxval;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i) = (signed char)newval;
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i) = (short)newval;
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)newval;
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp1, *cp2, *ncp;
|
||
|
|
+ int len1, len2, size, val1 = 0, val2 = 0, maxval, newval;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#s#i:add",
|
||
|
|
+ &cp1, &len1, &cp2, &len2, &size ) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( len1 != len2 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Lengths should be the same");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) maxval = 0x7f;
|
||
|
|
+ else if ( size == 2 ) maxval = 0x7fff;
|
||
|
|
+ else if ( size == 4 ) maxval = 0x7fffffff;
|
||
|
|
+ else {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len1);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len1; i += size ) {
|
||
|
|
+ if ( size == 1 ) val1 = (int)*CHARP(cp1, i);
|
||
|
|
+ else if ( size == 2 ) val1 = (int)*SHORTP(cp1, i);
|
||
|
|
+ else if ( size == 4 ) val1 = (int)*LONGP(cp1, i);
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) val2 = (int)*CHARP(cp2, i);
|
||
|
|
+ else if ( size == 2 ) val2 = (int)*SHORTP(cp2, i);
|
||
|
|
+ else if ( size == 4 ) val2 = (int)*LONGP(cp2, i);
|
||
|
|
+
|
||
|
|
+ newval = val1 + val2;
|
||
|
|
+ /* truncate in case of overflow */
|
||
|
|
+ if (newval > maxval) newval = maxval;
|
||
|
|
+ else if (newval < -maxval) newval = -maxval;
|
||
|
|
+ else if (size == 4 && (newval^val1) < 0 && (newval^val2) < 0)
|
||
|
|
+ newval = val1 > 0 ? maxval : - maxval;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i) = (signed char)newval;
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i) = (short)newval;
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)newval;
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_bias(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp, *ncp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
- int bias;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#ii:bias",
|
||
|
|
- &cp, &len, &size , &bias) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i) = (signed char)(val+bias);
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i) = (short)(val+bias);
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(val+bias);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp, *ncp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+ int bias;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#ii:bias",
|
||
|
|
+ &cp, &len, &size , &bias) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = (int)*CHARP(cp, i);
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = (int)*LONGP(cp, i);
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i) = (signed char)(val+bias);
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i) = (short)(val+bias);
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(val+bias);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_reverse(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- unsigned char *ncp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i, j;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:reverse",
|
||
|
|
- &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
-
|
||
|
|
- j = len - i - size;
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, j) = (signed char)(val >> 8);
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, j) = (short)(val);
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, j) = (Py_Int32)(val<<16);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp;
|
||
|
|
+ unsigned char *ncp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i, j;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:reverse",
|
||
|
|
+ &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4 ) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
+
|
||
|
|
+ j = len - i - size;
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, j) = (signed char)(val >> 8);
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, j) = (short)(val);
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, j) = (Py_Int32)(val<<16);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_lin2lin(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- unsigned char *ncp;
|
||
|
|
- int len, new_len, size, size2, val = 0;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i, j;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#ii:lin2lin",
|
||
|
|
- &cp, &len, &size, &size2) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( (size != 1 && size != 2 && size != 4) ||
|
||
|
|
- (size2 != 1 && size2 != 2 && size2 != 4)) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- new_len = (len/size)*size2;
|
||
|
|
- if (new_len < 0) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0, j=0; i < len; i += size, j += size2 ) {
|
||
|
|
- if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
-
|
||
|
|
- if ( size2 == 1 ) *CHARP(ncp, j) = (signed char)(val >> 8);
|
||
|
|
- else if ( size2 == 2 ) *SHORTP(ncp, j) = (short)(val);
|
||
|
|
- else if ( size2 == 4 ) *LONGP(ncp, j) = (Py_Int32)(val<<16);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp;
|
||
|
|
+ unsigned char *ncp;
|
||
|
|
+ int len, new_len, size, size2, val = 0;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i, j;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#ii:lin2lin",
|
||
|
|
+ &cp, &len, &size, &size2) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( (size != 1 && size != 2 && size != 4) ||
|
||
|
|
+ (size2 != 1 && size2 != 2 && size2 != 4)) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ new_len = (len/size)*size2;
|
||
|
|
+ if (new_len < 0) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0, j=0; i < len; i += size, j += size2 ) {
|
||
|
|
+ if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
+
|
||
|
|
+ if ( size2 == 1 ) *CHARP(ncp, j) = (signed char)(val >> 8);
|
||
|
|
+ else if ( size2 == 2 ) *SHORTP(ncp, j) = (short)(val);
|
||
|
|
+ else if ( size2 == 4 ) *LONGP(ncp, j) = (Py_Int32)(val<<16);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
gcd(int a, int b)
|
||
|
|
{
|
||
|
|
- while (b > 0) {
|
||
|
|
- int tmp = a % b;
|
||
|
|
- a = b;
|
||
|
|
- b = tmp;
|
||
|
|
- }
|
||
|
|
- return a;
|
||
|
|
+ while (b > 0) {
|
||
|
|
+ int tmp = a % b;
|
||
|
|
+ a = b;
|
||
|
|
+ b = tmp;
|
||
|
|
+ }
|
||
|
|
+ return a;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_ratecv(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- char *cp, *ncp;
|
||
|
|
- int len, size, nchannels, inrate, outrate, weightA, weightB;
|
||
|
|
- int chan, d, *prev_i, *cur_i, cur_o;
|
||
|
|
- PyObject *state, *samps, *str, *rv = NULL;
|
||
|
|
- int bytes_per_frame;
|
||
|
|
- size_t alloc_size;
|
||
|
|
-
|
||
|
|
- weightA = 1;
|
||
|
|
- weightB = 0;
|
||
|
|
- if (!PyArg_ParseTuple(args, "s#iiiiO|ii:ratecv", &cp, &len, &size,
|
||
|
|
- &nchannels, &inrate, &outrate, &state,
|
||
|
|
- &weightA, &weightB))
|
||
|
|
- return NULL;
|
||
|
|
- if (size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- if (nchannels < 1) {
|
||
|
|
- PyErr_SetString(AudioopError, "# of channels should be >= 1");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- bytes_per_frame = size * nchannels;
|
||
|
|
- if (bytes_per_frame / nchannels != size) {
|
||
|
|
- /* This overflow test is rigorously correct because
|
||
|
|
- both multiplicands are >= 1. Use the argument names
|
||
|
|
- from the docs for the error msg. */
|
||
|
|
- PyErr_SetString(PyExc_OverflowError,
|
||
|
|
- "width * nchannels too big for a C int");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- if (weightA < 1 || weightB < 0) {
|
||
|
|
- PyErr_SetString(AudioopError,
|
||
|
|
- "weightA should be >= 1, weightB should be >= 0");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- if (len % bytes_per_frame != 0) {
|
||
|
|
- PyErr_SetString(AudioopError, "not a whole number of frames");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- if (inrate <= 0 || outrate <= 0) {
|
||
|
|
- PyErr_SetString(AudioopError, "sampling rate not > 0");
|
||
|
|
- return NULL;
|
||
|
|
- }
|
||
|
|
- /* divide inrate and outrate by their greatest common divisor */
|
||
|
|
- d = gcd(inrate, outrate);
|
||
|
|
- inrate /= d;
|
||
|
|
- outrate /= d;
|
||
|
|
-
|
||
|
|
- alloc_size = sizeof(int) * (unsigned)nchannels;
|
||
|
|
- if (alloc_size < (unsigned)nchannels) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- prev_i = (int *) malloc(alloc_size);
|
||
|
|
- cur_i = (int *) malloc(alloc_size);
|
||
|
|
- if (prev_i == NULL || cur_i == NULL) {
|
||
|
|
- (void) PyErr_NoMemory();
|
||
|
|
+ char *cp, *ncp;
|
||
|
|
+ int len, size, nchannels, inrate, outrate, weightA, weightB;
|
||
|
|
+ int chan, d, *prev_i, *cur_i, cur_o;
|
||
|
|
+ PyObject *state, *samps, *str, *rv = NULL;
|
||
|
|
+ int bytes_per_frame;
|
||
|
|
+ size_t alloc_size;
|
||
|
|
+
|
||
|
|
+ weightA = 1;
|
||
|
|
+ weightB = 0;
|
||
|
|
+ if (!PyArg_ParseTuple(args, "s#iiiiO|ii:ratecv", &cp, &len, &size,
|
||
|
|
+ &nchannels, &inrate, &outrate, &state,
|
||
|
|
+ &weightA, &weightB))
|
||
|
|
+ return NULL;
|
||
|
|
+ if (size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ if (nchannels < 1) {
|
||
|
|
+ PyErr_SetString(AudioopError, "# of channels should be >= 1");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ bytes_per_frame = size * nchannels;
|
||
|
|
+ if (bytes_per_frame / nchannels != size) {
|
||
|
|
+ /* This overflow test is rigorously correct because
|
||
|
|
+ both multiplicands are >= 1. Use the argument names
|
||
|
|
+ from the docs for the error msg. */
|
||
|
|
+ PyErr_SetString(PyExc_OverflowError,
|
||
|
|
+ "width * nchannels too big for a C int");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ if (weightA < 1 || weightB < 0) {
|
||
|
|
+ PyErr_SetString(AudioopError,
|
||
|
|
+ "weightA should be >= 1, weightB should be >= 0");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ if (len % bytes_per_frame != 0) {
|
||
|
|
+ PyErr_SetString(AudioopError, "not a whole number of frames");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ if (inrate <= 0 || outrate <= 0) {
|
||
|
|
+ PyErr_SetString(AudioopError, "sampling rate not > 0");
|
||
|
|
+ return NULL;
|
||
|
|
+ }
|
||
|
|
+ /* divide inrate and outrate by their greatest common divisor */
|
||
|
|
+ d = gcd(inrate, outrate);
|
||
|
|
+ inrate /= d;
|
||
|
|
+ outrate /= d;
|
||
|
|
+
|
||
|
|
+ alloc_size = sizeof(int) * (unsigned)nchannels;
|
||
|
|
+ if (alloc_size < (unsigned)nchannels) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ prev_i = (int *) malloc(alloc_size);
|
||
|
|
+ cur_i = (int *) malloc(alloc_size);
|
||
|
|
+ if (prev_i == NULL || cur_i == NULL) {
|
||
|
|
+ (void) PyErr_NoMemory();
|
||
|
|
+ goto exit;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ len /= bytes_per_frame; /* # of frames */
|
||
|
|
+
|
||
|
|
+ if (state == Py_None) {
|
||
|
|
+ d = -outrate;
|
||
|
|
+ for (chan = 0; chan < nchannels; chan++)
|
||
|
|
+ prev_i[chan] = cur_i[chan] = 0;
|
||
|
|
+ }
|
||
|
|
+ else {
|
||
|
|
+ if (!PyArg_ParseTuple(state,
|
||
|
|
+ "iO!;audioop.ratecv: illegal state argument",
|
||
|
|
+ &d, &PyTuple_Type, &samps))
|
||
|
|
+ goto exit;
|
||
|
|
+ if (PyTuple_Size(samps) != nchannels) {
|
||
|
|
+ PyErr_SetString(AudioopError,
|
||
|
|
+ "illegal state argument");
|
||
|
|
+ goto exit;
|
||
|
|
+ }
|
||
|
|
+ for (chan = 0; chan < nchannels; chan++) {
|
||
|
|
+ if (!PyArg_ParseTuple(PyTuple_GetItem(samps, chan),
|
||
|
|
+ "ii:ratecv", &prev_i[chan],
|
||
|
|
+ &cur_i[chan]))
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
+ }
|
||
|
|
|
||
|
|
- len /= bytes_per_frame; /* # of frames */
|
||
|
|
+ /* str <- Space for the output buffer. */
|
||
|
|
+ {
|
||
|
|
+ /* There are len input frames, so we need (mathematically)
|
||
|
|
+ ceiling(len*outrate/inrate) output frames, and each frame
|
||
|
|
+ requires bytes_per_frame bytes. Computing this
|
||
|
|
+ without spurious overflow is the challenge; we can
|
||
|
|
+ settle for a reasonable upper bound, though. */
|
||
|
|
+ int ceiling; /* the number of output frames */
|
||
|
|
+ int nbytes; /* the number of output bytes needed */
|
||
|
|
+ int q = len / inrate;
|
||
|
|
+ /* Now len = q * inrate + r exactly (with r = len % inrate),
|
||
|
|
+ and this is less than q * inrate + inrate = (q+1)*inrate.
|
||
|
|
+ So a reasonable upper bound on len*outrate/inrate is
|
||
|
|
+ ((q+1)*inrate)*outrate/inrate =
|
||
|
|
+ (q+1)*outrate.
|
||
|
|
+ */
|
||
|
|
+ ceiling = (q+1) * outrate;
|
||
|
|
+ nbytes = ceiling * bytes_per_frame;
|
||
|
|
+ /* See whether anything overflowed; if not, get the space. */
|
||
|
|
+ if (q+1 < 0 ||
|
||
|
|
+ ceiling / outrate != q+1 ||
|
||
|
|
+ nbytes / bytes_per_frame != ceiling)
|
||
|
|
+ str = NULL;
|
||
|
|
+ else
|
||
|
|
+ str = PyBytes_FromStringAndSize(NULL, nbytes);
|
||
|
|
|
||
|
|
- if (state == Py_None) {
|
||
|
|
- d = -outrate;
|
||
|
|
+ if (str == NULL) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ goto exit;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ ncp = PyBytes_AsString(str);
|
||
|
|
+
|
||
|
|
+ for (;;) {
|
||
|
|
+ while (d < 0) {
|
||
|
|
+ if (len == 0) {
|
||
|
|
+ samps = PyTuple_New(nchannels);
|
||
|
|
+ if (samps == NULL)
|
||
|
|
+ goto exit;
|
||
|
|
for (chan = 0; chan < nchannels; chan++)
|
||
|
|
- prev_i[chan] = cur_i[chan] = 0;
|
||
|
|
- }
|
||
|
|
- else {
|
||
|
|
- if (!PyArg_ParseTuple(state,
|
||
|
|
- "iO!;audioop.ratecv: illegal state argument",
|
||
|
|
- &d, &PyTuple_Type, &samps))
|
||
|
|
- goto exit;
|
||
|
|
- if (PyTuple_Size(samps) != nchannels) {
|
||
|
|
- PyErr_SetString(AudioopError,
|
||
|
|
- "illegal state argument");
|
||
|
|
- goto exit;
|
||
|
|
- }
|
||
|
|
- for (chan = 0; chan < nchannels; chan++) {
|
||
|
|
- if (!PyArg_ParseTuple(PyTuple_GetItem(samps, chan),
|
||
|
|
- "ii:ratecv", &prev_i[chan],
|
||
|
|
- &cur_i[chan]))
|
||
|
|
- goto exit;
|
||
|
|
- }
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- /* str <- Space for the output buffer. */
|
||
|
|
- {
|
||
|
|
- /* There are len input frames, so we need (mathematically)
|
||
|
|
- ceiling(len*outrate/inrate) output frames, and each frame
|
||
|
|
- requires bytes_per_frame bytes. Computing this
|
||
|
|
- without spurious overflow is the challenge; we can
|
||
|
|
- settle for a reasonable upper bound, though. */
|
||
|
|
- int ceiling; /* the number of output frames */
|
||
|
|
- int nbytes; /* the number of output bytes needed */
|
||
|
|
- int q = len / inrate;
|
||
|
|
- /* Now len = q * inrate + r exactly (with r = len % inrate),
|
||
|
|
- and this is less than q * inrate + inrate = (q+1)*inrate.
|
||
|
|
- So a reasonable upper bound on len*outrate/inrate is
|
||
|
|
- ((q+1)*inrate)*outrate/inrate =
|
||
|
|
- (q+1)*outrate.
|
||
|
|
- */
|
||
|
|
- ceiling = (q+1) * outrate;
|
||
|
|
- nbytes = ceiling * bytes_per_frame;
|
||
|
|
- /* See whether anything overflowed; if not, get the space. */
|
||
|
|
- if (q+1 < 0 ||
|
||
|
|
- ceiling / outrate != q+1 ||
|
||
|
|
- nbytes / bytes_per_frame != ceiling)
|
||
|
|
- str = NULL;
|
||
|
|
- else
|
||
|
|
- str = PyBytes_FromStringAndSize(NULL, nbytes);
|
||
|
|
-
|
||
|
|
- if (str == NULL) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- goto exit;
|
||
|
|
- }
|
||
|
|
- }
|
||
|
|
- ncp = PyBytes_AsString(str);
|
||
|
|
-
|
||
|
|
- for (;;) {
|
||
|
|
- while (d < 0) {
|
||
|
|
- if (len == 0) {
|
||
|
|
- samps = PyTuple_New(nchannels);
|
||
|
|
- if (samps == NULL)
|
||
|
|
- goto exit;
|
||
|
|
- for (chan = 0; chan < nchannels; chan++)
|
||
|
|
- PyTuple_SetItem(samps, chan,
|
||
|
|
- Py_BuildValue("(ii)",
|
||
|
|
- prev_i[chan],
|
||
|
|
- cur_i[chan]));
|
||
|
|
- if (PyErr_Occurred())
|
||
|
|
- goto exit;
|
||
|
|
- /* We have checked before that the length
|
||
|
|
- * of the string fits into int. */
|
||
|
|
- len = (int)(ncp - PyBytes_AsString(str));
|
||
|
|
- rv = PyBytes_FromStringAndSize
|
||
|
|
- (PyBytes_AsString(str), len);
|
||
|
|
- Py_DECREF(str);
|
||
|
|
- str = rv;
|
||
|
|
- if (str == NULL)
|
||
|
|
- goto exit;
|
||
|
|
- rv = Py_BuildValue("(O(iO))", str, d, samps);
|
||
|
|
- Py_DECREF(samps);
|
||
|
|
- Py_DECREF(str);
|
||
|
|
- goto exit; /* return rv */
|
||
|
|
- }
|
||
|
|
- for (chan = 0; chan < nchannels; chan++) {
|
||
|
|
- prev_i[chan] = cur_i[chan];
|
||
|
|
- if (size == 1)
|
||
|
|
- cur_i[chan] = ((int)*CHARP(cp, 0)) << 8;
|
||
|
|
- else if (size == 2)
|
||
|
|
- cur_i[chan] = (int)*SHORTP(cp, 0);
|
||
|
|
- else if (size == 4)
|
||
|
|
- cur_i[chan] = ((int)*LONGP(cp, 0)) >> 16;
|
||
|
|
- cp += size;
|
||
|
|
- /* implements a simple digital filter */
|
||
|
|
- cur_i[chan] =
|
||
|
|
- (weightA * cur_i[chan] +
|
||
|
|
- weightB * prev_i[chan]) /
|
||
|
|
- (weightA + weightB);
|
||
|
|
- }
|
||
|
|
- len--;
|
||
|
|
- d += outrate;
|
||
|
|
- }
|
||
|
|
- while (d >= 0) {
|
||
|
|
- for (chan = 0; chan < nchannels; chan++) {
|
||
|
|
- cur_o = (prev_i[chan] * d +
|
||
|
|
- cur_i[chan] * (outrate - d)) /
|
||
|
|
- outrate;
|
||
|
|
- if (size == 1)
|
||
|
|
- *CHARP(ncp, 0) = (signed char)(cur_o >> 8);
|
||
|
|
- else if (size == 2)
|
||
|
|
- *SHORTP(ncp, 0) = (short)(cur_o);
|
||
|
|
- else if (size == 4)
|
||
|
|
- *LONGP(ncp, 0) = (Py_Int32)(cur_o<<16);
|
||
|
|
- ncp += size;
|
||
|
|
- }
|
||
|
|
- d -= inrate;
|
||
|
|
- }
|
||
|
|
+ PyTuple_SetItem(samps, chan,
|
||
|
|
+ Py_BuildValue("(ii)",
|
||
|
|
+ prev_i[chan],
|
||
|
|
+ cur_i[chan]));
|
||
|
|
+ if (PyErr_Occurred())
|
||
|
|
+ goto exit;
|
||
|
|
+ /* We have checked before that the length
|
||
|
|
+ * of the string fits into int. */
|
||
|
|
+ len = (int)(ncp - PyBytes_AsString(str));
|
||
|
|
+ rv = PyBytes_FromStringAndSize
|
||
|
|
+ (PyBytes_AsString(str), len);
|
||
|
|
+ Py_DECREF(str);
|
||
|
|
+ str = rv;
|
||
|
|
+ if (str == NULL)
|
||
|
|
+ goto exit;
|
||
|
|
+ rv = Py_BuildValue("(O(iO))", str, d, samps);
|
||
|
|
+ Py_DECREF(samps);
|
||
|
|
+ Py_DECREF(str);
|
||
|
|
+ goto exit; /* return rv */
|
||
|
|
+ }
|
||
|
|
+ for (chan = 0; chan < nchannels; chan++) {
|
||
|
|
+ prev_i[chan] = cur_i[chan];
|
||
|
|
+ if (size == 1)
|
||
|
|
+ cur_i[chan] = ((int)*CHARP(cp, 0)) << 8;
|
||
|
|
+ else if (size == 2)
|
||
|
|
+ cur_i[chan] = (int)*SHORTP(cp, 0);
|
||
|
|
+ else if (size == 4)
|
||
|
|
+ cur_i[chan] = ((int)*LONGP(cp, 0)) >> 16;
|
||
|
|
+ cp += size;
|
||
|
|
+ /* implements a simple digital filter */
|
||
|
|
+ cur_i[chan] =
|
||
|
|
+ (weightA * cur_i[chan] +
|
||
|
|
+ weightB * prev_i[chan]) /
|
||
|
|
+ (weightA + weightB);
|
||
|
|
+ }
|
||
|
|
+ len--;
|
||
|
|
+ d += outrate;
|
||
|
|
+ }
|
||
|
|
+ while (d >= 0) {
|
||
|
|
+ for (chan = 0; chan < nchannels; chan++) {
|
||
|
|
+ cur_o = (prev_i[chan] * d +
|
||
|
|
+ cur_i[chan] * (outrate - d)) /
|
||
|
|
+ outrate;
|
||
|
|
+ if (size == 1)
|
||
|
|
+ *CHARP(ncp, 0) = (signed char)(cur_o >> 8);
|
||
|
|
+ else if (size == 2)
|
||
|
|
+ *SHORTP(ncp, 0) = (short)(cur_o);
|
||
|
|
+ else if (size == 4)
|
||
|
|
+ *LONGP(ncp, 0) = (Py_Int32)(cur_o<<16);
|
||
|
|
+ ncp += size;
|
||
|
|
+ }
|
||
|
|
+ d -= inrate;
|
||
|
|
}
|
||
|
|
+ }
|
||
|
|
exit:
|
||
|
|
- if (prev_i != NULL)
|
||
|
|
- free(prev_i);
|
||
|
|
- if (cur_i != NULL)
|
||
|
|
- free(cur_i);
|
||
|
|
- return rv;
|
||
|
|
+ if (prev_i != NULL)
|
||
|
|
+ free(prev_i);
|
||
|
|
+ if (cur_i != NULL)
|
||
|
|
+ free(cur_i);
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_lin2ulaw(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- unsigned char *ncp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:lin2ulaw",
|
||
|
|
- &cp, &len, &size) )
|
||
|
|
- return 0 ;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len/size);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
-
|
||
|
|
- *ncp++ = st_14linear2ulaw(val);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp;
|
||
|
|
+ unsigned char *ncp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:lin2ulaw",
|
||
|
|
+ &cp, &len, &size) )
|
||
|
|
+ return 0 ;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len/size);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
+
|
||
|
|
+ *ncp++ = st_14linear2ulaw(val);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_ulaw2lin(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- unsigned char *cp;
|
||
|
|
- unsigned char cval;
|
||
|
|
- signed char *ncp;
|
||
|
|
- int len, new_len, size, val;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:ulaw2lin",
|
||
|
|
- &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- new_len = len*size;
|
||
|
|
- if (new_len < 0) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0; i < new_len; i += size ) {
|
||
|
|
- cval = *cp++;
|
||
|
|
- val = st_ulaw2linear16(cval);
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i) = (signed char)(val >> 8);
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i) = (short)(val);
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(val<<16);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ unsigned char *cp;
|
||
|
|
+ unsigned char cval;
|
||
|
|
+ signed char *ncp;
|
||
|
|
+ int len, new_len, size, val;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:ulaw2lin",
|
||
|
|
+ &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ new_len = len*size;
|
||
|
|
+ if (new_len < 0) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < new_len; i += size ) {
|
||
|
|
+ cval = *cp++;
|
||
|
|
+ val = st_ulaw2linear16(cval);
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i) = (signed char)(val >> 8);
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i) = (short)(val);
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(val<<16);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_lin2alaw(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- unsigned char *ncp;
|
||
|
|
- int len, size, val = 0;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:lin2alaw",
|
||
|
|
- &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, len/size);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
-
|
||
|
|
- *ncp++ = st_linear2alaw(val);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ signed char *cp;
|
||
|
|
+ unsigned char *ncp;
|
||
|
|
+ int len, size, val = 0;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:lin2alaw",
|
||
|
|
+ &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, len/size);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (unsigned char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
+
|
||
|
|
+ *ncp++ = st_linear2alaw(val);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_alaw2lin(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- unsigned char *cp;
|
||
|
|
- unsigned char cval;
|
||
|
|
- signed char *ncp;
|
||
|
|
- int len, new_len, size, val;
|
||
|
|
- PyObject *rv;
|
||
|
|
- int i;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#i:alaw2lin",
|
||
|
|
- &cp, &len, &size) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- new_len = len*size;
|
||
|
|
- if (new_len < 0) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
- rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
- if ( rv == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
-
|
||
|
|
- for ( i=0; i < new_len; i += size ) {
|
||
|
|
- cval = *cp++;
|
||
|
|
- val = st_alaw2linear16(cval);
|
||
|
|
-
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i) = (signed char)(val >> 8);
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i) = (short)(val);
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(val<<16);
|
||
|
|
- }
|
||
|
|
- return rv;
|
||
|
|
+ unsigned char *cp;
|
||
|
|
+ unsigned char cval;
|
||
|
|
+ signed char *ncp;
|
||
|
|
+ int len, new_len, size, val;
|
||
|
|
+ PyObject *rv;
|
||
|
|
+ int i;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#i:alaw2lin",
|
||
|
|
+ &cp, &len, &size) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ new_len = len*size;
|
||
|
|
+ if (new_len < 0) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ rv = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
+ if ( rv == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(rv);
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < new_len; i += size ) {
|
||
|
|
+ cval = *cp++;
|
||
|
|
+ val = st_alaw2linear16(cval);
|
||
|
|
+
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i) = (signed char)(val >> 8);
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i) = (short)(val);
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(val<<16);
|
||
|
|
+ }
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_lin2adpcm(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- signed char *ncp;
|
||
|
|
- int len, size, val = 0, step, valpred, delta,
|
||
|
|
- index, sign, vpdiff, diff;
|
||
|
|
- PyObject *rv, *state, *str;
|
||
|
|
- int i, outputbuffer = 0, bufferstep;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#iO:lin2adpcm",
|
||
|
|
- &cp, &len, &size, &state) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- str = PyBytes_FromStringAndSize(NULL, len/(size*2));
|
||
|
|
- if ( str == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(str);
|
||
|
|
-
|
||
|
|
- /* Decode state, should have (value, step) */
|
||
|
|
- if ( state == Py_None ) {
|
||
|
|
- /* First time, it seems. Set defaults */
|
||
|
|
- valpred = 0;
|
||
|
|
- step = 7;
|
||
|
|
- index = 0;
|
||
|
|
- } else if ( !PyArg_ParseTuple(state, "ii", &valpred, &index) )
|
||
|
|
- return 0;
|
||
|
|
+ signed char *cp;
|
||
|
|
+ signed char *ncp;
|
||
|
|
+ int len, size, val = 0, step, valpred, delta,
|
||
|
|
+ index, sign, vpdiff, diff;
|
||
|
|
+ PyObject *rv, *state, *str;
|
||
|
|
+ int i, outputbuffer = 0, bufferstep;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#iO:lin2adpcm",
|
||
|
|
+ &cp, &len, &size, &state) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ str = PyBytes_FromStringAndSize(NULL, len/(size*2));
|
||
|
|
+ if ( str == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(str);
|
||
|
|
+
|
||
|
|
+ /* Decode state, should have (value, step) */
|
||
|
|
+ if ( state == Py_None ) {
|
||
|
|
+ /* First time, it seems. Set defaults */
|
||
|
|
+ valpred = 0;
|
||
|
|
+ step = 7;
|
||
|
|
+ index = 0;
|
||
|
|
+ } else if ( !PyArg_ParseTuple(state, "ii", &valpred, &index) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ step = stepsizeTable[index];
|
||
|
|
+ bufferstep = 1;
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < len; i += size ) {
|
||
|
|
+ if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
+ else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
+ else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
+
|
||
|
|
+ /* Step 1 - compute difference with previous value */
|
||
|
|
+ diff = val - valpred;
|
||
|
|
+ sign = (diff < 0) ? 8 : 0;
|
||
|
|
+ if ( sign ) diff = (-diff);
|
||
|
|
+
|
||
|
|
+ /* Step 2 - Divide and clamp */
|
||
|
|
+ /* Note:
|
||
|
|
+ ** This code *approximately* computes:
|
||
|
|
+ ** delta = diff*4/step;
|
||
|
|
+ ** vpdiff = (delta+0.5)*step/4;
|
||
|
|
+ ** but in shift step bits are dropped. The net result of this
|
||
|
|
+ ** is that even if you have fast mul/div hardware you cannot
|
||
|
|
+ ** put it to good use since the fixup would be too expensive.
|
||
|
|
+ */
|
||
|
|
+ delta = 0;
|
||
|
|
+ vpdiff = (step >> 3);
|
||
|
|
|
||
|
|
+ if ( diff >= step ) {
|
||
|
|
+ delta = 4;
|
||
|
|
+ diff -= step;
|
||
|
|
+ vpdiff += step;
|
||
|
|
+ }
|
||
|
|
+ step >>= 1;
|
||
|
|
+ if ( diff >= step ) {
|
||
|
|
+ delta |= 2;
|
||
|
|
+ diff -= step;
|
||
|
|
+ vpdiff += step;
|
||
|
|
+ }
|
||
|
|
+ step >>= 1;
|
||
|
|
+ if ( diff >= step ) {
|
||
|
|
+ delta |= 1;
|
||
|
|
+ vpdiff += step;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ /* Step 3 - Update previous value */
|
||
|
|
+ if ( sign )
|
||
|
|
+ valpred -= vpdiff;
|
||
|
|
+ else
|
||
|
|
+ valpred += vpdiff;
|
||
|
|
+
|
||
|
|
+ /* Step 4 - Clamp previous value to 16 bits */
|
||
|
|
+ if ( valpred > 32767 )
|
||
|
|
+ valpred = 32767;
|
||
|
|
+ else if ( valpred < -32768 )
|
||
|
|
+ valpred = -32768;
|
||
|
|
+
|
||
|
|
+ /* Step 5 - Assemble value, update index and step values */
|
||
|
|
+ delta |= sign;
|
||
|
|
+
|
||
|
|
+ index += indexTable[delta];
|
||
|
|
+ if ( index < 0 ) index = 0;
|
||
|
|
+ if ( index > 88 ) index = 88;
|
||
|
|
step = stepsizeTable[index];
|
||
|
|
- bufferstep = 1;
|
||
|
|
|
||
|
|
- for ( i=0; i < len; i += size ) {
|
||
|
|
- if ( size == 1 ) val = ((int)*CHARP(cp, i)) << 8;
|
||
|
|
- else if ( size == 2 ) val = (int)*SHORTP(cp, i);
|
||
|
|
- else if ( size == 4 ) val = ((int)*LONGP(cp, i)) >> 16;
|
||
|
|
-
|
||
|
|
- /* Step 1 - compute difference with previous value */
|
||
|
|
- diff = val - valpred;
|
||
|
|
- sign = (diff < 0) ? 8 : 0;
|
||
|
|
- if ( sign ) diff = (-diff);
|
||
|
|
-
|
||
|
|
- /* Step 2 - Divide and clamp */
|
||
|
|
- /* Note:
|
||
|
|
- ** This code *approximately* computes:
|
||
|
|
- ** delta = diff*4/step;
|
||
|
|
- ** vpdiff = (delta+0.5)*step/4;
|
||
|
|
- ** but in shift step bits are dropped. The net result of this
|
||
|
|
- ** is that even if you have fast mul/div hardware you cannot
|
||
|
|
- ** put it to good use since the fixup would be too expensive.
|
||
|
|
- */
|
||
|
|
- delta = 0;
|
||
|
|
- vpdiff = (step >> 3);
|
||
|
|
-
|
||
|
|
- if ( diff >= step ) {
|
||
|
|
- delta = 4;
|
||
|
|
- diff -= step;
|
||
|
|
- vpdiff += step;
|
||
|
|
- }
|
||
|
|
- step >>= 1;
|
||
|
|
- if ( diff >= step ) {
|
||
|
|
- delta |= 2;
|
||
|
|
- diff -= step;
|
||
|
|
- vpdiff += step;
|
||
|
|
- }
|
||
|
|
- step >>= 1;
|
||
|
|
- if ( diff >= step ) {
|
||
|
|
- delta |= 1;
|
||
|
|
- vpdiff += step;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- /* Step 3 - Update previous value */
|
||
|
|
- if ( sign )
|
||
|
|
- valpred -= vpdiff;
|
||
|
|
- else
|
||
|
|
- valpred += vpdiff;
|
||
|
|
-
|
||
|
|
- /* Step 4 - Clamp previous value to 16 bits */
|
||
|
|
- if ( valpred > 32767 )
|
||
|
|
- valpred = 32767;
|
||
|
|
- else if ( valpred < -32768 )
|
||
|
|
- valpred = -32768;
|
||
|
|
-
|
||
|
|
- /* Step 5 - Assemble value, update index and step values */
|
||
|
|
- delta |= sign;
|
||
|
|
-
|
||
|
|
- index += indexTable[delta];
|
||
|
|
- if ( index < 0 ) index = 0;
|
||
|
|
- if ( index > 88 ) index = 88;
|
||
|
|
- step = stepsizeTable[index];
|
||
|
|
-
|
||
|
|
- /* Step 6 - Output value */
|
||
|
|
- if ( bufferstep ) {
|
||
|
|
- outputbuffer = (delta << 4) & 0xf0;
|
||
|
|
- } else {
|
||
|
|
- *ncp++ = (delta & 0x0f) | outputbuffer;
|
||
|
|
- }
|
||
|
|
- bufferstep = !bufferstep;
|
||
|
|
+ /* Step 6 - Output value */
|
||
|
|
+ if ( bufferstep ) {
|
||
|
|
+ outputbuffer = (delta << 4) & 0xf0;
|
||
|
|
+ } else {
|
||
|
|
+ *ncp++ = (delta & 0x0f) | outputbuffer;
|
||
|
|
}
|
||
|
|
- rv = Py_BuildValue("(O(ii))", str, valpred, index);
|
||
|
|
- Py_DECREF(str);
|
||
|
|
- return rv;
|
||
|
|
+ bufferstep = !bufferstep;
|
||
|
|
+ }
|
||
|
|
+ rv = Py_BuildValue("(O(ii))", str, valpred, index);
|
||
|
|
+ Py_DECREF(str);
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyObject *
|
||
|
|
audioop_adpcm2lin(PyObject *self, PyObject *args)
|
||
|
|
{
|
||
|
|
- signed char *cp;
|
||
|
|
- signed char *ncp;
|
||
|
|
- int len, new_len, size, valpred, step, delta, index, sign, vpdiff;
|
||
|
|
- PyObject *rv, *str, *state;
|
||
|
|
- int i, inputbuffer = 0, bufferstep;
|
||
|
|
-
|
||
|
|
- if ( !PyArg_ParseTuple(args, "s#iO:adpcm2lin",
|
||
|
|
- &cp, &len, &size, &state) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
- PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
- return 0;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- /* Decode state, should have (value, step) */
|
||
|
|
- if ( state == Py_None ) {
|
||
|
|
- /* First time, it seems. Set defaults */
|
||
|
|
- valpred = 0;
|
||
|
|
- step = 7;
|
||
|
|
- index = 0;
|
||
|
|
- } else if ( !PyArg_ParseTuple(state, "ii", &valpred, &index) )
|
||
|
|
- return 0;
|
||
|
|
-
|
||
|
|
- new_len = len*size*2;
|
||
|
|
- if (new_len < 0) {
|
||
|
|
- PyErr_SetString(PyExc_MemoryError,
|
||
|
|
- "not enough memory for output buffer");
|
||
|
|
- return 0;
|
||
|
|
+ signed char *cp;
|
||
|
|
+ signed char *ncp;
|
||
|
|
+ int len, new_len, size, valpred, step, delta, index, sign, vpdiff;
|
||
|
|
+ PyObject *rv, *str, *state;
|
||
|
|
+ int i, inputbuffer = 0, bufferstep;
|
||
|
|
+
|
||
|
|
+ if ( !PyArg_ParseTuple(args, "s#iO:adpcm2lin",
|
||
|
|
+ &cp, &len, &size, &state) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ if ( size != 1 && size != 2 && size != 4) {
|
||
|
|
+ PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ /* Decode state, should have (value, step) */
|
||
|
|
+ if ( state == Py_None ) {
|
||
|
|
+ /* First time, it seems. Set defaults */
|
||
|
|
+ valpred = 0;
|
||
|
|
+ step = 7;
|
||
|
|
+ index = 0;
|
||
|
|
+ } else if ( !PyArg_ParseTuple(state, "ii", &valpred, &index) )
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ new_len = len*size*2;
|
||
|
|
+ if (new_len < 0) {
|
||
|
|
+ PyErr_SetString(PyExc_MemoryError,
|
||
|
|
+ "not enough memory for output buffer");
|
||
|
|
+ return 0;
|
||
|
|
+ }
|
||
|
|
+ str = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
+ if ( str == 0 )
|
||
|
|
+ return 0;
|
||
|
|
+ ncp = (signed char *)PyBytes_AsString(str);
|
||
|
|
+
|
||
|
|
+ step = stepsizeTable[index];
|
||
|
|
+ bufferstep = 0;
|
||
|
|
+
|
||
|
|
+ for ( i=0; i < new_len; i += size ) {
|
||
|
|
+ /* Step 1 - get the delta value and compute next index */
|
||
|
|
+ if ( bufferstep ) {
|
||
|
|
+ delta = inputbuffer & 0xf;
|
||
|
|
+ } else {
|
||
|
|
+ inputbuffer = *cp++;
|
||
|
|
+ delta = (inputbuffer >> 4) & 0xf;
|
||
|
|
}
|
||
|
|
- str = PyBytes_FromStringAndSize(NULL, new_len);
|
||
|
|
- if ( str == 0 )
|
||
|
|
- return 0;
|
||
|
|
- ncp = (signed char *)PyBytes_AsString(str);
|
||
|
|
|
||
|
|
+ bufferstep = !bufferstep;
|
||
|
|
+
|
||
|
|
+ /* Step 2 - Find new index value (for later) */
|
||
|
|
+ index += indexTable[delta];
|
||
|
|
+ if ( index < 0 ) index = 0;
|
||
|
|
+ if ( index > 88 ) index = 88;
|
||
|
|
+
|
||
|
|
+ /* Step 3 - Separate sign and magnitude */
|
||
|
|
+ sign = delta & 8;
|
||
|
|
+ delta = delta & 7;
|
||
|
|
+
|
||
|
|
+ /* Step 4 - Compute difference and new predicted value */
|
||
|
|
+ /*
|
||
|
|
+ ** Computes 'vpdiff = (delta+0.5)*step/4', but see comment
|
||
|
|
+ ** in adpcm_coder.
|
||
|
|
+ */
|
||
|
|
+ vpdiff = step >> 3;
|
||
|
|
+ if ( delta & 4 ) vpdiff += step;
|
||
|
|
+ if ( delta & 2 ) vpdiff += step>>1;
|
||
|
|
+ if ( delta & 1 ) vpdiff += step>>2;
|
||
|
|
+
|
||
|
|
+ if ( sign )
|
||
|
|
+ valpred -= vpdiff;
|
||
|
|
+ else
|
||
|
|
+ valpred += vpdiff;
|
||
|
|
+
|
||
|
|
+ /* Step 5 - clamp output value */
|
||
|
|
+ if ( valpred > 32767 )
|
||
|
|
+ valpred = 32767;
|
||
|
|
+ else if ( valpred < -32768 )
|
||
|
|
+ valpred = -32768;
|
||
|
|
+
|
||
|
|
+ /* Step 6 - Update step value */
|
||
|
|
step = stepsizeTable[index];
|
||
|
|
- bufferstep = 0;
|
||
|
|
-
|
||
|
|
- for ( i=0; i < new_len; i += size ) {
|
||
|
|
- /* Step 1 - get the delta value and compute next index */
|
||
|
|
- if ( bufferstep ) {
|
||
|
|
- delta = inputbuffer & 0xf;
|
||
|
|
- } else {
|
||
|
|
- inputbuffer = *cp++;
|
||
|
|
- delta = (inputbuffer >> 4) & 0xf;
|
||
|
|
- }
|
||
|
|
-
|
||
|
|
- bufferstep = !bufferstep;
|
||
|
|
-
|
||
|
|
- /* Step 2 - Find new index value (for later) */
|
||
|
|
- index += indexTable[delta];
|
||
|
|
- if ( index < 0 ) index = 0;
|
||
|
|
- if ( index > 88 ) index = 88;
|
||
|
|
-
|
||
|
|
- /* Step 3 - Separate sign and magnitude */
|
||
|
|
- sign = delta & 8;
|
||
|
|
- delta = delta & 7;
|
||
|
|
-
|
||
|
|
- /* Step 4 - Compute difference and new predicted value */
|
||
|
|
- /*
|
||
|
|
- ** Computes 'vpdiff = (delta+0.5)*step/4', but see comment
|
||
|
|
- ** in adpcm_coder.
|
||
|
|
- */
|
||
|
|
- vpdiff = step >> 3;
|
||
|
|
- if ( delta & 4 ) vpdiff += step;
|
||
|
|
- if ( delta & 2 ) vpdiff += step>>1;
|
||
|
|
- if ( delta & 1 ) vpdiff += step>>2;
|
||
|
|
-
|
||
|
|
- if ( sign )
|
||
|
|
- valpred -= vpdiff;
|
||
|
|
- else
|
||
|
|
- valpred += vpdiff;
|
||
|
|
-
|
||
|
|
- /* Step 5 - clamp output value */
|
||
|
|
- if ( valpred > 32767 )
|
||
|
|
- valpred = 32767;
|
||
|
|
- else if ( valpred < -32768 )
|
||
|
|
- valpred = -32768;
|
||
|
|
-
|
||
|
|
- /* Step 6 - Update step value */
|
||
|
|
- step = stepsizeTable[index];
|
||
|
|
-
|
||
|
|
- /* Step 6 - Output value */
|
||
|
|
- if ( size == 1 ) *CHARP(ncp, i) = (signed char)(valpred >> 8);
|
||
|
|
- else if ( size == 2 ) *SHORTP(ncp, i) = (short)(valpred);
|
||
|
|
- else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(valpred<<16);
|
||
|
|
- }
|
||
|
|
|
||
|
|
- rv = Py_BuildValue("(O(ii))", str, valpred, index);
|
||
|
|
- Py_DECREF(str);
|
||
|
|
- return rv;
|
||
|
|
+ /* Step 6 - Output value */
|
||
|
|
+ if ( size == 1 ) *CHARP(ncp, i) = (signed char)(valpred >> 8);
|
||
|
|
+ else if ( size == 2 ) *SHORTP(ncp, i) = (short)(valpred);
|
||
|
|
+ else if ( size == 4 ) *LONGP(ncp, i) = (Py_Int32)(valpred<<16);
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ rv = Py_BuildValue("(O(ii))", str, valpred, index);
|
||
|
|
+ Py_DECREF(str);
|
||
|
|
+ return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static PyMethodDef audioop_methods[] = {
|
||
|
|
- { "max", audioop_max, METH_VARARGS },
|
||
|
|
- { "minmax", audioop_minmax, METH_VARARGS },
|
||
|
|
- { "avg", audioop_avg, METH_VARARGS },
|
||
|
|
- { "maxpp", audioop_maxpp, METH_VARARGS },
|
||
|
|
- { "avgpp", audioop_avgpp, METH_VARARGS },
|
||
|
|
- { "rms", audioop_rms, METH_VARARGS },
|
||
|
|
- { "findfit", audioop_findfit, METH_VARARGS },
|
||
|
|
- { "findmax", audioop_findmax, METH_VARARGS },
|
||
|
|
- { "findfactor", audioop_findfactor, METH_VARARGS },
|
||
|
|
- { "cross", audioop_cross, METH_VARARGS },
|
||
|
|
- { "mul", audioop_mul, METH_VARARGS },
|
||
|
|
- { "add", audioop_add, METH_VARARGS },
|
||
|
|
- { "bias", audioop_bias, METH_VARARGS },
|
||
|
|
- { "ulaw2lin", audioop_ulaw2lin, METH_VARARGS },
|
||
|
|
- { "lin2ulaw", audioop_lin2ulaw, METH_VARARGS },
|
||
|
|
- { "alaw2lin", audioop_alaw2lin, METH_VARARGS },
|
||
|
|
- { "lin2alaw", audioop_lin2alaw, METH_VARARGS },
|
||
|
|
- { "lin2lin", audioop_lin2lin, METH_VARARGS },
|
||
|
|
- { "adpcm2lin", audioop_adpcm2lin, METH_VARARGS },
|
||
|
|
- { "lin2adpcm", audioop_lin2adpcm, METH_VARARGS },
|
||
|
|
- { "tomono", audioop_tomono, METH_VARARGS },
|
||
|
|
- { "tostereo", audioop_tostereo, METH_VARARGS },
|
||
|
|
- { "getsample", audioop_getsample, METH_VARARGS },
|
||
|
|
- { "reverse", audioop_reverse, METH_VARARGS },
|
||
|
|
- { "ratecv", audioop_ratecv, METH_VARARGS },
|
||
|
|
- { 0, 0 }
|
||
|
|
+ { "max", audioop_max, METH_VARARGS },
|
||
|
|
+ { "minmax", audioop_minmax, METH_VARARGS },
|
||
|
|
+ { "avg", audioop_avg, METH_VARARGS },
|
||
|
|
+ { "maxpp", audioop_maxpp, METH_VARARGS },
|
||
|
|
+ { "avgpp", audioop_avgpp, METH_VARARGS },
|
||
|
|
+ { "rms", audioop_rms, METH_VARARGS },
|
||
|
|
+ { "findfit", audioop_findfit, METH_VARARGS },
|
||
|
|
+ { "findmax", audioop_findmax, METH_VARARGS },
|
||
|
|
+ { "findfactor", audioop_findfactor, METH_VARARGS },
|
||
|
|
+ { "cross", audioop_cross, METH_VARARGS },
|
||
|
|
+ { "mul", audioop_mul, METH_VARARGS },
|
||
|
|
+ { "add", audioop_add, METH_VARARGS },
|
||
|
|
+ { "bias", audioop_bias, METH_VARARGS },
|
||
|
|
+ { "ulaw2lin", audioop_ulaw2lin, METH_VARARGS },
|
||
|
|
+ { "lin2ulaw", audioop_lin2ulaw, METH_VARARGS },
|
||
|
|
+ { "alaw2lin", audioop_alaw2lin, METH_VARARGS },
|
||
|
|
+ { "lin2alaw", audioop_lin2alaw, METH_VARARGS },
|
||
|
|
+ { "lin2lin", audioop_lin2lin, METH_VARARGS },
|
||
|
|
+ { "adpcm2lin", audioop_adpcm2lin, METH_VARARGS },
|
||
|
|
+ { "lin2adpcm", audioop_lin2adpcm, METH_VARARGS },
|
||
|
|
+ { "tomono", audioop_tomono, METH_VARARGS },
|
||
|
|
+ { "tostereo", audioop_tostereo, METH_VARARGS },
|
||
|
|
+ { "getsample", audioop_getsample, METH_VARARGS },
|
||
|
|
+ { "reverse", audioop_reverse, METH_VARARGS },
|
||
|
|
+ { "ratecv", audioop_ratecv, METH_VARARGS },
|
||
|
|
+ { 0, 0 }
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
static struct PyModuleDef audioopmodule = {
|
||
|
|
- PyModuleDef_HEAD_INIT,
|
||
|
|
- "audioop",
|
||
|
|
- NULL,
|
||
|
|
- -1,
|
||
|
|
- audioop_methods,
|
||
|
|
- NULL,
|
||
|
|
- NULL,
|
||
|
|
- NULL,
|
||
|
|
- NULL
|
||
|
|
+ PyModuleDef_HEAD_INIT,
|
||
|
|
+ "audioop",
|
||
|
|
+ NULL,
|
||
|
|
+ -1,
|
||
|
|
+ audioop_methods,
|
||
|
|
+ NULL,
|
||
|
|
+ NULL,
|
||
|
|
+ NULL,
|
||
|
|
+ NULL
|
||
|
|
};
|
||
|
|
|
||
|
|
PyMODINIT_FUNC
|
||
|
|
PyInit_audioop(void)
|
||
|
|
{
|
||
|
|
- PyObject *m, *d;
|
||
|
|
- m = PyModule_Create(&audioopmodule);
|
||
|
|
- if (m == NULL)
|
||
|
|
- return NULL;
|
||
|
|
- d = PyModule_GetDict(m);
|
||
|
|
- if (d == NULL)
|
||
|
|
- return NULL;
|
||
|
|
- AudioopError = PyErr_NewException("audioop.error", NULL, NULL);
|
||
|
|
- if (AudioopError != NULL)
|
||
|
|
- PyDict_SetItemString(d,"error",AudioopError);
|
||
|
|
- return m;
|
||
|
|
+ PyObject *m, *d;
|
||
|
|
+ m = PyModule_Create(&audioopmodule);
|
||
|
|
+ if (m == NULL)
|
||
|
|
+ return NULL;
|
||
|
|
+ d = PyModule_GetDict(m);
|
||
|
|
+ if (d == NULL)
|
||
|
|
+ return NULL;
|
||
|
|
+ AudioopError = PyErr_NewException("audioop.error", NULL, NULL);
|
||
|
|
+ if (AudioopError != NULL)
|
||
|
|
+ PyDict_SetItemString(d,"error",AudioopError);
|
||
|
|
+ return m;
|
||
|
|
}
|