mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-08 13:29:59 -05:00
merge 'lennart' branch back into trunk.
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1971 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
6687dd0131
commit
a67c21f093
294 changed files with 79057 additions and 11614 deletions
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@ -43,30 +43,30 @@
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#include "g711.h"
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#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */
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#define QUANT_MASK (0xf) /* Quantization field mask. */
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#define NSEGS (8) /* Number of A-law segments. */
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#define SEG_SHIFT (4) /* Left shift for segment number. */
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#define SEG_MASK (0x70) /* Segment field mask. */
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#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */
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#define QUANT_MASK (0xf) /* Quantization field mask. */
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#define NSEGS (8) /* Number of A-law segments. */
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#define SEG_SHIFT (4) /* Left shift for segment number. */
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#define SEG_MASK (0x70) /* Segment field mask. */
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#if !defined(FAST_ALAW_CONVERSION) || !defined(FAST_ULAW_CONVERSION)
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static int16_t seg_aend[8] = {0x1F, 0x3F, 0x7F, 0xFF,
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0x1FF, 0x3FF, 0x7FF, 0xFFF};
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0x1FF, 0x3FF, 0x7FF, 0xFFF};
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static int16_t seg_uend[8] = {0x3F, 0x7F, 0xFF, 0x1FF,
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0x3FF, 0x7FF, 0xFFF, 0x1FFF};
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0x3FF, 0x7FF, 0xFFF, 0x1FFF};
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static int16_t search(
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int16_t val,
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int16_t *table,
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int size)
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int16_t val,
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int16_t *table,
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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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#endif /* !FAST_*_CONVERSION */
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@ -77,55 +77,55 @@ static int16_t search(
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* the data shifted such that it only contains information in the lower
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* 13-bits.
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*
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* Linear Input Code Compressed Code
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* ------------------------ ---------------
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* 0000000wxyza 000wxyz
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* 0000001wxyza 001wxyz
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* 000001wxyzab 010wxyz
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* 00001wxyzabc 011wxyz
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* 0001wxyzabcd 100wxyz
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* 001wxyzabcde 101wxyz
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* 01wxyzabcdef 110wxyz
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* 1wxyzabcdefg 111wxyz
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* Linear Input Code Compressed Code
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* ------------------------ ---------------
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* 0000000wxyza 000wxyz
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* 0000001wxyza 001wxyz
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* 000001wxyzab 010wxyz
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* 00001wxyzabc 011wxyz
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* 0001wxyzabcd 100wxyz
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* 001wxyzabcde 101wxyz
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* 01wxyzabcdef 110wxyz
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* 1wxyzabcdefg 111wxyz
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*
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* For further information see John C. Bellamy's Digital Telephony, 1982,
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* John Wiley & Sons, pps 98-111 and 472-476.
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*/
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unsigned char st_13linear2alaw(
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int16_t pcm_val) /* 2's complement (13-bit range) */
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int16_t pcm_val) /* 2's complement (13-bit range) */
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{
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int16_t mask;
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short seg;
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unsigned char aval;
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int16_t mask;
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short seg;
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unsigned char aval;
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/* Have calling software do it since its already doing a shift
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* from 32-bits down to 16-bits.
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*/
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/* pcm_val = pcm_val >> 3; */
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/* Have calling software do it since its already doing a shift
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* from 32-bits down to 16-bits.
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*/
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/* pcm_val = pcm_val >> 3; */
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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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/* 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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/* Convert the scaled magnitude to segment number. */
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seg = search(pcm_val, seg_aend, 8);
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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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/* Combine the sign, segment, and quantization bits. */
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/* Combine the sign, segment, and quantization bits. */
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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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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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aval |= (pcm_val >> seg) & QUANT_MASK;
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return (aval ^ mask);
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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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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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aval |= (pcm_val >> seg) & QUANT_MASK;
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return (aval ^ mask);
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}
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}
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/*
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@ -133,31 +133,31 @@ unsigned char st_13linear2alaw(
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*
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*/
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int16_t st_alaw2linear16(
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unsigned char a_val)
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unsigned char a_val)
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{
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int16_t t;
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int16_t seg;
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int16_t t;
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int16_t seg;
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a_val ^= 0x55;
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a_val ^= 0x55;
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t = (a_val & QUANT_MASK) << 4;
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seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
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switch (seg) {
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case 0:
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t += 8;
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break;
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case 1:
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t += 0x108;
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break;
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default:
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t += 0x108;
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t <<= seg - 1;
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}
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return ((a_val & SIGN_BIT) ? t : -t);
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t = (a_val & QUANT_MASK) << 4;
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seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
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switch (seg) {
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case 0:
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t += 8;
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break;
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case 1:
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t += 0x108;
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break;
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default:
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t += 0x108;
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t <<= seg - 1;
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}
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return ((a_val & SIGN_BIT) ? t : -t);
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}
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#endif /* !FAST_ALAW_CONVERSION */
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#define BIAS (0x84) /* Bias for linear code. */
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#define BIAS (0x84) /* Bias for linear code. */
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#define CLIP 8159
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#ifndef FAST_ULAW_CONVERSION
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@ -171,16 +171,16 @@ int16_t st_alaw2linear16(
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* is biased by adding 33 which shifts the encoding range from (0 - 8158) to
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* (33 - 8191). The result can be seen in the following encoding table:
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*
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* Biased Linear Input Code Compressed Code
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* ------------------------ ---------------
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* 00000001wxyza 000wxyz
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* 0000001wxyzab 001wxyz
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* 000001wxyzabc 010wxyz
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* 00001wxyzabcd 011wxyz
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* 0001wxyzabcde 100wxyz
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* 001wxyzabcdef 101wxyz
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* 01wxyzabcdefg 110wxyz
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* 1wxyzabcdefgh 111wxyz
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* Biased Linear Input Code Compressed Code
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* ------------------------ ---------------
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* 00000001wxyza 000wxyz
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* 0000001wxyzab 001wxyz
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* 000001wxyzabc 010wxyz
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* 00001wxyzabcd 011wxyz
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* 0001wxyzabcde 100wxyz
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* 001wxyzabcdef 101wxyz
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* 01wxyzabcdefg 110wxyz
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* 1wxyzabcdefgh 111wxyz
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*
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* Each biased linear code has a leading 1 which identifies the segment
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* number. The value of the segment number is equal to 7 minus the number
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@ -194,41 +194,41 @@ int16_t st_alaw2linear16(
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* John Wiley & Sons, pps 98-111 and 472-476.
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*/
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unsigned char st_14linear2ulaw(
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int16_t pcm_val) /* 2's complement (14-bit range) */
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int16_t pcm_val) /* 2's complement (14-bit range) */
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{
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int16_t mask;
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int16_t seg;
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unsigned char uval;
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int16_t mask;
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int16_t seg;
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unsigned char uval;
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/* Have calling software do it since its already doing a shift
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* from 32-bits down to 16-bits.
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*/
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/* pcm_val = pcm_val >> 2; */
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/* Have calling software do it since its already doing a shift
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* from 32-bits down to 16-bits.
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*/
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/* pcm_val = pcm_val >> 2; */
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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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/* 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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/* Convert the scaled magnitude to segment number. */
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seg = search(pcm_val, seg_uend, 8);
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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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* 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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* 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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@ -242,21 +242,21 @@ unsigned char st_14linear2ulaw(
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* original code word. This is in keeping with ISDN conventions.
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*/
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int16_t st_ulaw2linear16(
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unsigned char u_val)
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unsigned char u_val)
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{
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int16_t t;
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int16_t t;
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/* Complement to obtain normal u-law value. */
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u_val = ~u_val;
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/* Complement to obtain normal u-law value. */
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u_val = ~u_val;
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/*
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* Extract and bias the quantization bits. Then
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* shift up by the segment number and subtract out the bias.
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*/
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t = ((u_val & QUANT_MASK) << 3) + BIAS;
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t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
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/*
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* Extract and bias the quantization bits. Then
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* shift up by the segment number and subtract out the bias.
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*/
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t = ((u_val & QUANT_MASK) << 3) + BIAS;
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t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
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return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
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return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
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}
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#endif /* !FAST_ULAW_CONVERSION */
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@ -2413,52 +2413,52 @@ int main()
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printf("int16_t _st_alaw2linear16[256] = {\n ");
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for (x = 0; x < 256; x++)
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{
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printf("%8d,", st_alaw2linear16(x));
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y++;
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if (y == 7)
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{
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y = 0;
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printf("\n ");
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}
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printf("%8d,", st_alaw2linear16(x));
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y++;
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if (y == 7)
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{
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y = 0;
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printf("\n ");
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}
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}
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printf("\n};\n\nuint8_t _st_13linear2alaw[0x2000] = {\n ");
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y = 0;
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for (x = 0; x < 0x2000; x++)
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{
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printf(" 0x%02x,", st_13linear2alaw((-0x1000)+x));
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y++;
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if (y == 12)
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{
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y = 0;
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printf("\n ");
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}
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printf(" 0x%02x,", st_13linear2alaw((-0x1000)+x));
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y++;
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if (y == 12)
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{
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y = 0;
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printf("\n ");
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}
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}
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printf("\n};\n\nint16_t _st_ulaw2linear16[256] = {\n ");
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y = 0;
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for (x = 0; x < 256; x++)
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{
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printf("%8d,", st_ulaw2linear16(x));
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y++;
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if (y == 7)
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{
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y = 0;
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printf("\n ");
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}
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printf("%8d,", st_ulaw2linear16(x));
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y++;
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if (y == 7)
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{
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y = 0;
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printf("\n ");
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}
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}
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printf("\n};\n\nuint8_t _st_14linear2ulaw[0x4000] = {\n ");
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y = 0;
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for (x = 0; x < 0x4000; x++)
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{
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printf(" 0x%02x,", st_14linear2ulaw((-0x2000)+x));
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y++;
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if (y == 12)
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{
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y = 0;
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printf("\n ");
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}
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printf(" 0x%02x,", st_14linear2ulaw((-0x2000)+x));
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y++;
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if (y == 12)
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{
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y = 0;
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printf("\n ");
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}
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}
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printf("\n};\n");
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|
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@ -2468,64 +2468,64 @@ int main()
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/* The following is not used by SoX but kept for reference */
|
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#if 0
|
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/* copy from CCITT G.711 specifications */
|
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unsigned char _u2a[128] = { /* u- to A-law conversions */
|
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1, 1, 2, 2, 3, 3, 4, 4,
|
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5, 5, 6, 6, 7, 7, 8, 8,
|
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9, 10, 11, 12, 13, 14, 15, 16,
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17, 18, 19, 20, 21, 22, 23, 24,
|
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25, 27, 29, 31, 33, 34, 35, 36,
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37, 38, 39, 40, 41, 42, 43, 44,
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46, 48, 49, 50, 51, 52, 53, 54,
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55, 56, 57, 58, 59, 60, 61, 62,
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64, 65, 66, 67, 68, 69, 70, 71,
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72, 73, 74, 75, 76, 77, 78, 79,
|
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unsigned char _u2a[128] = { /* u- to A-law conversions */
|
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1, 1, 2, 2, 3, 3, 4, 4,
|
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5, 5, 6, 6, 7, 7, 8, 8,
|
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9, 10, 11, 12, 13, 14, 15, 16,
|
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17, 18, 19, 20, 21, 22, 23, 24,
|
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25, 27, 29, 31, 33, 34, 35, 36,
|
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37, 38, 39, 40, 41, 42, 43, 44,
|
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46, 48, 49, 50, 51, 52, 53, 54,
|
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55, 56, 57, 58, 59, 60, 61, 62,
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64, 65, 66, 67, 68, 69, 70, 71,
|
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72, 73, 74, 75, 76, 77, 78, 79,
|
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/* corrected:
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81, 82, 83, 84, 85, 86, 87, 88,
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81, 82, 83, 84, 85, 86, 87, 88,
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should be: */
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80, 82, 83, 84, 85, 86, 87, 88,
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89, 90, 91, 92, 93, 94, 95, 96,
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97, 98, 99, 100, 101, 102, 103, 104,
|
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105, 106, 107, 108, 109, 110, 111, 112,
|
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113, 114, 115, 116, 117, 118, 119, 120,
|
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121, 122, 123, 124, 125, 126, 127, 128};
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80, 82, 83, 84, 85, 86, 87, 88,
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89, 90, 91, 92, 93, 94, 95, 96,
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97, 98, 99, 100, 101, 102, 103, 104,
|
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105, 106, 107, 108, 109, 110, 111, 112,
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113, 114, 115, 116, 117, 118, 119, 120,
|
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121, 122, 123, 124, 125, 126, 127, 128};
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|
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unsigned char _a2u[128] = { /* A- to u-law conversions */
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1, 3, 5, 7, 9, 11, 13, 15,
|
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16, 17, 18, 19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31,
|
||||
32, 32, 33, 33, 34, 34, 35, 35,
|
||||
36, 37, 38, 39, 40, 41, 42, 43,
|
||||
44, 45, 46, 47, 48, 48, 49, 49,
|
||||
50, 51, 52, 53, 54, 55, 56, 57,
|
||||
58, 59, 60, 61, 62, 63, 64, 64,
|
||||
65, 66, 67, 68, 69, 70, 71, 72,
|
||||
unsigned char _a2u[128] = { /* A- to u-law conversions */
|
||||
1, 3, 5, 7, 9, 11, 13, 15,
|
||||
16, 17, 18, 19, 20, 21, 22, 23,
|
||||
24, 25, 26, 27, 28, 29, 30, 31,
|
||||
32, 32, 33, 33, 34, 34, 35, 35,
|
||||
36, 37, 38, 39, 40, 41, 42, 43,
|
||||
44, 45, 46, 47, 48, 48, 49, 49,
|
||||
50, 51, 52, 53, 54, 55, 56, 57,
|
||||
58, 59, 60, 61, 62, 63, 64, 64,
|
||||
65, 66, 67, 68, 69, 70, 71, 72,
|
||||
/* corrected:
|
||||
73, 74, 75, 76, 77, 78, 79, 79,
|
||||
73, 74, 75, 76, 77, 78, 79, 79,
|
||||
should be: */
|
||||
73, 74, 75, 76, 77, 78, 79, 80,
|
||||
73, 74, 75, 76, 77, 78, 79, 80,
|
||||
|
||||
80, 81, 82, 83, 84, 85, 86, 87,
|
||||
88, 89, 90, 91, 92, 93, 94, 95,
|
||||
96, 97, 98, 99, 100, 101, 102, 103,
|
||||
104, 105, 106, 107, 108, 109, 110, 111,
|
||||
112, 113, 114, 115, 116, 117, 118, 119,
|
||||
120, 121, 122, 123, 124, 125, 126, 127};
|
||||
80, 81, 82, 83, 84, 85, 86, 87,
|
||||
88, 89, 90, 91, 92, 93, 94, 95,
|
||||
96, 97, 98, 99, 100, 101, 102, 103,
|
||||
104, 105, 106, 107, 108, 109, 110, 111,
|
||||
112, 113, 114, 115, 116, 117, 118, 119,
|
||||
120, 121, 122, 123, 124, 125, 126, 127};
|
||||
|
||||
/* A-law to u-law conversion */
|
||||
unsigned char st_alaw2ulaw(
|
||||
unsigned char aval)
|
||||
unsigned char aval)
|
||||
{
|
||||
aval &= 0xff;
|
||||
return (unsigned char) ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
|
||||
(0x7F ^ _a2u[aval ^ 0x55]));
|
||||
aval &= 0xff;
|
||||
return (unsigned char) ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
|
||||
(0x7F ^ _a2u[aval ^ 0x55]));
|
||||
}
|
||||
|
||||
/* u-law to A-law conversion */
|
||||
unsigned char st_ulaw2alaw(
|
||||
unsigned char uval)
|
||||
unsigned char uval)
|
||||
{
|
||||
uval &= 0xff;
|
||||
return (unsigned char) ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
|
||||
(unsigned char) (0x55 ^ (_u2a[0x7F ^ uval] - 1)));
|
||||
uval &= 0xff;
|
||||
return (unsigned char) ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
|
||||
(unsigned char) (0x55 ^ (_u2a[0x7F ^ uval] - 1)));
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue