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Merged pcm2 branch.

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This commit is contained in:
Jaroslav Kysela 2000-05-08 18:53:38 +00:00
parent 986c1500d2
commit 1cd6778173
40 changed files with 5053 additions and 3045 deletions
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152
src/pcm/pcm_misc.c
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@ -21,11 +21,14 @@
#ifdef __KERNEL__
#include "../include/driver.h"
#include "../include/pcm.h"
#include "../include/pcm_plugin.h"
#else
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <byteswap.h>
#include <errno.h>
#include <endian.h>
#include <byteswap.h>
@ -187,10 +190,6 @@ int snd_pcm_format_physical_width(int format)
ssize_t snd_pcm_format_size(int format, size_t samples)
{
if (samples < 0)
return -EINVAL;
if (samples == 0)
return samples;
switch (format) {
case SND_PCM_SFMT_S8:
case SND_PCM_SFMT_U8:
@ -229,6 +228,11 @@ ssize_t snd_pcm_format_size(int format, size_t samples)
}
}
ssize_t snd_pcm_format_bytes_per_second(snd_pcm_format_t *format)
{
return snd_pcm_format_size(format->format, format->voices * format->rate);
}
const char *snd_pcm_get_format_name(int format)
{
static char *formats[] = {
@ -265,23 +269,9 @@ const char *snd_pcm_get_format_name(int format)
return formats[format];
}
unsigned char snd_pcm_format_silence(int format)
u_int64_t snd_pcm_format_silence_64(int format)
{
switch (format) {
case SND_PCM_SFMT_IMA_ADPCM: /* special case */
case SND_PCM_SFMT_MPEG:
case SND_PCM_SFMT_GSM:
case SND_PCM_SFMT_MU_LAW:
case SND_PCM_SFMT_A_LAW:
return 0;
case SND_PCM_SFMT_U8:
case SND_PCM_SFMT_U16_LE:
case SND_PCM_SFMT_U16_BE:
case SND_PCM_SFMT_U24_LE:
case SND_PCM_SFMT_U24_BE:
case SND_PCM_SFMT_U32_LE:
case SND_PCM_SFMT_U32_BE:
return 0x80;
case SND_PCM_SFMT_S8:
case SND_PCM_SFMT_S16_LE:
case SND_PCM_SFMT_S16_BE:
@ -290,15 +280,135 @@ unsigned char snd_pcm_format_silence(int format)
case SND_PCM_SFMT_S32_LE:
case SND_PCM_SFMT_S32_BE:
return 0;
case SND_PCM_SFMT_FLOAT:
case SND_PCM_SFMT_FLOAT64:
case SND_PCM_SFMT_U8:
return 0x8080808080808080UL;
case SND_PCM_SFMT_U16_LE:
case SND_PCM_SFMT_U24_LE:
case SND_PCM_SFMT_U32_LE:
#if defined(LITTLE_ENDIAN)
return 0x8000800080008000UL;
#elif defined(BIG_ENDIAN)
return 0x0080008000800080UL;
#else
#error "endian"
#endif
case SND_PCM_SFMT_U16_BE:
case SND_PCM_SFMT_U24_BE:
case SND_PCM_SFMT_U32_BE:
#if defined(LITTLE_ENDIAN)
return 0x0000008000000080UL;
#elif defined(BIG_ENDIAN)
return 0x8000000080000000UL;
#else
#error "endian"
#endif
case SND_PCM_SFMT_FLOAT_LE:
#if defined(LITTLE_ENDIAN)
return (float)0.0;
#elif defined(BIG_ENDIAN)
return bswap_32((u_int32_t)((float)0.0));
#else
#error "endian"
#endif
case SND_PCM_SFMT_FLOAT64_LE:
#if defined(LITTLE_ENDIAN)
return (double)0.0;
#elif defined(BIG_ENDIAN)
return bswap_64((u_int64_t)((double)0.0));
#else
#error "endian"
#endif
case SND_PCM_SFMT_FLOAT_BE:
#if defined(LITTLE_ENDIAN)
return bswap_32((u_int32_t)((float)0.0));
#elif defined(BIG_ENDIAN)
return (float)0.0;
#else
#error "endian"
#endif
case SND_PCM_SFMT_FLOAT64_BE:
#if defined(LITTLE_ENDIAN)
return bswap_64((u_int64_t)((double)0.0));
#elif defined(BIG_ENDIAN)
return (double)0.0;
#else
#error "endian"
#endif
case SND_PCM_SFMT_IEC958_SUBFRAME_LE:
case SND_PCM_SFMT_IEC958_SUBFRAME_BE:
return 0;
case SND_PCM_SFMT_MU_LAW:
return 0x7f7f7f7f7f7f7f7fUL;
case SND_PCM_SFMT_A_LAW:
return 0x5555555555555555UL;
case SND_PCM_SFMT_IMA_ADPCM: /* special case */
case SND_PCM_SFMT_MPEG:
case SND_PCM_SFMT_GSM:
return 0;
}
return 0;
}
u_int32_t snd_pcm_format_silence_32(int format)
{
return (u_int32_t)snd_pcm_format_silence_64(format);
}
u_int16_t snd_pcm_format_silence_16(int format)
{
return (u_int16_t)snd_pcm_format_silence_64(format);
}
u_int8_t snd_pcm_format_silence(int format)
{
return (u_int8_t)snd_pcm_format_silence_64(format);
}
ssize_t snd_pcm_format_set_silence(int format, void *data, size_t count)
{
size_t count1;
if (count == 0)
return 0;
switch (snd_pcm_format_width(format)) {
case 4:
case 8: {
u_int8_t silence = snd_pcm_format_silence_64(format);
memset(data, silence, count);
break;
}
case 16: {
u_int16_t silence = snd_pcm_format_silence_64(format);
if (count % 2)
return -EINVAL;
count1 = count / 2;
while (count1-- > 0)
*((u_int16_t *)data)++ = silence;
break;
}
case 32: {
u_int32_t silence = snd_pcm_format_silence_64(format);
if (count % 4)
return -EINVAL;
count1 = count / 4;
while (count1-- > 0)
*((u_int32_t *)data)++ = silence;
break;
}
case 64: {
u_int64_t silence = snd_pcm_format_silence_64(format);
if (count % 8)
return -EINVAL;
count1 = count / 8;
while (count1-- > 0)
*((u_int64_t *)data)++ = silence;
}
default:
return -EINVAL;
}
return count;
}
static int linear_formats[4*2*2] = {
SND_PCM_SFMT_S8,
SND_PCM_SFMT_U8,