mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-10 13:30:01 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

- splitted mmap in logical steps

Browse source 
- optimized mmap transfer
- completed mmap helpers
- renamed pcm_plugin_build.c to pcm_common.c
This commit is contained in:
Abramo Bagnara 2000-05-16 15:20:34 +00:00
parent 5b42e338bb
commit 7b054f4dce
17 changed files with 658 additions and 781 deletions
Download patch file Download diff file Expand all files Collapse all files

44
src/pcm/plugin/adpcm.c
View file

@ -231,17 +231,17 @@ static void adpcm_decode(snd_pcm_plugin_t *plugin,
adpcm_voice_t *state;
if (!src_voices[voice].enabled) {
if (dst_voices[voice].wanted)
snd_pcm_plugin_silence_voice(plugin, &dst_voices[voice], samples);
snd_pcm_area_silence(&dst_voices[voice].area, 0, samples, plugin->dst_format.format);
dst_voices[voice].enabled = 0;
continue;
}
dst_voices[voice].enabled = 1;
src = src_voices[voice].addr + src_voices[voice].first / 8;
srcbit = src_voices[voice].first % 8;
dst = dst_voices[voice].addr + dst_voices[voice].first / 8;
src_step = src_voices[voice].step / 8;
srcbit_step = src_voices[voice].step % 8;
dst_step = dst_voices[voice].step / 8;
src = src_voices[voice].area.addr + src_voices[voice].area.first / 8;
srcbit = src_voices[voice].area.first % 8;
dst = dst_voices[voice].area.addr + dst_voices[voice].area.first / 8;
src_step = src_voices[voice].area.step / 8;
srcbit_step = src_voices[voice].area.step % 8;
dst_step = dst_voices[voice].area.step / 8;
state = &data->voices[voice];
samples1 = samples;
while (samples1-- > 0) {
@ -290,17 +290,17 @@ static void adpcm_encode(snd_pcm_plugin_t *plugin,
adpcm_voice_t *state;
if (!src_voices[voice].enabled) {
if (dst_voices[voice].wanted)
snd_pcm_plugin_silence_voice(plugin, &dst_voices[voice], samples);
snd_pcm_area_silence(&dst_voices[voice].area, 0, samples, plugin->dst_format.format);
dst_voices[voice].enabled = 0;
continue;
}
dst_voices[voice].enabled = 1;
src = src_voices[voice].addr + src_voices[voice].first / 8;
dst = dst_voices[voice].addr + dst_voices[voice].first / 8;
dstbit = dst_voices[voice].first % 8;
src_step = src_voices[voice].step / 8;
dst_step = dst_voices[voice].step / 8;
dstbit_step = dst_voices[voice].step % 8;
src = src_voices[voice].area.addr + src_voices[voice].area.first / 8;
dst = dst_voices[voice].area.addr + dst_voices[voice].area.first / 8;
dstbit = dst_voices[voice].area.first % 8;
src_step = src_voices[voice].area.step / 8;
dst_step = dst_voices[voice].area.step / 8;
dstbit_step = dst_voices[voice].area.step % 8;
state = &data->voices[voice];
samples1 = samples;
while (samples1-- > 0) {
@ -340,16 +340,16 @@ static ssize_t adpcm_transfer(snd_pcm_plugin_t *plugin,
return 0;
for (voice = 0; voice < plugin->src_format.voices; voice++) {
if (plugin->src_format.format == SND_PCM_SFMT_IMA_ADPCM) {
if (src_voices[voice].first % 4 != 0 ||
src_voices[voice].step % 4 != 0 ||
dst_voices[voice].first % 8 != 0 ||
dst_voices[voice].step % 8 != 0)
if (src_voices[voice].area.first % 4 != 0 ||
src_voices[voice].area.step % 4 != 0 ||
dst_voices[voice].area.first % 8 != 0 ||
dst_voices[voice].area.step % 8 != 0)
return -EINVAL;
} else {
if (src_voices[voice].first % 8 != 0 ||
src_voices[voice].step % 8 != 0 ||
dst_voices[voice].first % 4 != 0 ||
dst_voices[voice].step % 4 != 0)
if (src_voices[voice].area.first % 8 != 0 ||
src_voices[voice].area.step % 8 != 0 ||
dst_voices[voice].area.first % 4 != 0 ||
dst_voices[voice].area.step % 4 != 0)
return -EINVAL;
}
}