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Implement get_chmap/set_chmap for PCM plug, route and multi plugins

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Still incomplete implementations.  The query and set ops are missing
for route and multi plugins.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-07-25 15:36:16 +02:00
parent 3c4a22ea49
commit 3fb013065f
3 changed files with 93 additions and 0 deletions
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60
src/pcm/pcm_multi.c
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@ -739,6 +739,63 @@ static int snd_pcm_multi_mmap(snd_pcm_t *pcm)
return 0;
}
static int *snd_pcm_multi_get_chmap(snd_pcm_t *pcm)
{
snd_pcm_multi_t *multi = pcm->private_data;
int *map;
unsigned int i, idx;
map = malloc(pcm->channels + 4);
if (!map)
return NULL;
idx = 0;
for (i = 0; i < multi->slaves_count; ++i) {
int c, *slave_map;
slave_map = snd_pcm_get_chmap(multi->slaves[i].pcm);
if (!slave_map) {
free(map);
return NULL;
}
for (c = 0; c < *slave_map; c++) {
if (idx >= pcm->channels)
break;
map[idx++] = slave_map[c + 1];
}
free(slave_map);
}
return map;
}
static int snd_pcm_multi_set_chmap(snd_pcm_t *pcm, const int *map)
{
snd_pcm_multi_t *multi = pcm->private_data;
unsigned int i, idx, chs;
int err;
chs = *map;
if (chs != pcm->channels)
return -EINVAL;
map++;
for (i = 0; i < multi->slaves_count; ++i) {
int *slave_map;
unsigned int slave_chs;
slave_chs = multi->slaves[i].channels_count;
if (idx + slave_chs > chs)
break;
slave_map = malloc(slave_chs * 4 + 4);
if (!slave_map)
return -ENOMEM;
*slave_map = slave_chs;
memcpy(slave_map, map + idx, slave_chs * 4);
err = snd_pcm_set_chmap(multi->slaves[i].pcm, slave_map);
free(slave_map);
if (err < 0)
return err;
idx += slave_chs;
}
return 0;
}
static void snd_pcm_multi_dump(snd_pcm_t *pcm, snd_output_t *out)
{
snd_pcm_multi_t *multi = pcm->private_data;
@ -775,6 +832,9 @@ static const snd_pcm_ops_t snd_pcm_multi_ops = {
.async = snd_pcm_multi_async,
.mmap = snd_pcm_multi_mmap,
.munmap = snd_pcm_multi_munmap,
.query_chmaps = NULL, /* NYI */
.get_chmap = snd_pcm_multi_get_chmap,
.set_chmap = snd_pcm_multi_set_chmap,
};
static const snd_pcm_fast_ops_t snd_pcm_multi_fast_ops = {