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Added snd_pcm_build_linear_format

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This commit is contained in:
Abramo Bagnara 1999-12-25 15:22:21 +00:00
parent 244d345fda
commit 3696e16613
2 changed files with 44 additions and 3 deletions
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1
include/pcm.h
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@ -56,6 +56,7 @@ int snd_pcm_format_linear(int format);
int snd_pcm_format_little_endian(int format); int snd_pcm_format_little_endian(int format);
int snd_pcm_format_big_endian(int format); int snd_pcm_format_big_endian(int format);
int snd_pcm_format_width(int format); /* in bits */ int snd_pcm_format_width(int format); /* in bits */
int snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
ssize_t snd_pcm_format_size(int format, size_t samples); ssize_t snd_pcm_format_size(int format, size_t samples);
const char *snd_pcm_get_format_name(int format); const char *snd_pcm_get_format_name(int format);

44
src/pcm/pcm_misc.c
View file

@ -104,9 +104,9 @@ int snd_pcm_format_big_endian(int format)
int val; int val;
val = snd_pcm_format_little_endian(format); val = snd_pcm_format_little_endian(format);
if (val >= 0) if (val < 0)
val ^= 1;
return val; return val;
return !val;
} }
int snd_pcm_format_width(int format) int snd_pcm_format_width(int format)
@ -227,3 +227,43 @@ const char *snd_pcm_get_format_name(int format)
return "Unknown"; return "Unknown";
return formats[format]; return formats[format];
} }
static int linear_formats[4][2][2] = {
SND_PCM_SFMT_S8,
SND_PCM_SFMT_U8,
SND_PCM_SFMT_S8,
SND_PCM_SFMT_U8,
SND_PCM_SFMT_S16_LE,
SND_PCM_SFMT_S16_BE,
SND_PCM_SFMT_U16_LE,
SND_PCM_SFMT_U16_BE,
SND_PCM_SFMT_S24_LE,
SND_PCM_SFMT_S24_BE,
SND_PCM_SFMT_U24_LE,
SND_PCM_SFMT_U24_BE,
SND_PCM_SFMT_S32_LE,
SND_PCM_SFMT_S32_BE,
SND_PCM_SFMT_U32_LE,
SND_PCM_SFMT_U32_BE
};
int snd_pcm_build_linear_format(int width, int unsignd, int big_endian)
{
switch (width) {
case 8:
width = 0;
break;
case 16:
width = 1;
break;
case 24:
width = 2;
break;
case 32:
width = 3;
break;
default:
return -1;
}
return linear_formats[width][!!unsignd][!!big_endian];
}