mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-02 09:01:48 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Changed ALSA unit from bytes to frames. Splitted mmap control structs. Better midlevel interrupt handler

Browse source
This commit is contained in:
Abramo Bagnara 2000-06-10 12:39:51 +00:00
parent bbdff9fce5
commit e8cac7de4d
13 changed files with 405 additions and 571 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/pcm/pcm_misc.c
View file

@ -226,11 +226,6 @@ 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->channels * format->rate);
}
u_int64_t snd_pcm_format_silence_64(int format)
{
switch (format) {
@ -314,49 +309,46 @@ 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)
ssize_t snd_pcm_format_set_silence(int format, void *data, size_t samples)
{
size_t count1;
if (count == 0)
if (samples == 0)
return 0;
switch (snd_pcm_format_width(format)) {
case 4:
case 4: {
u_int8_t silence = snd_pcm_format_silence_64(format);
size_t samples1;
if (samples % 2 != 0)
return -EINVAL;
samples1 = samples / 2;
memset(data, silence, samples1);
break;
}
case 8: {
u_int8_t silence = snd_pcm_format_silence_64(format);
memset(data, silence, count);
memset(data, silence, samples);
break;
}
case 16: {
u_int16_t silence = snd_pcm_format_silence_64(format);
if (count % 2)
return -EINVAL;
count1 = count / 2;
while (count1-- > 0)
while (samples-- > 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)
while (samples-- > 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)
while (samples-- > 0)
*((u_int64_t *)data)++ = silence;
}
default:
return -EINVAL;
}
return count;
return samples;
}
static int linear_formats[4*2*2] = {