mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-31 22:25:35 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

New hw_params implementation

Browse source
This commit is contained in:
Abramo Bagnara 2000-12-21 20:44:10 +00:00
parent 2fe1219099
commit 8dd927e97f
28 changed files with 3550 additions and 1899 deletions
Download patch file Download diff file Expand all files Collapse all files

110
src/pcm/pcm_alaw.c
View file

@ -211,35 +211,59 @@ static void alaw_encode(const snd_pcm_channel_area_t *src_areas,
}
}
static int snd_pcm_alaw_hw_info(snd_pcm_t *pcm, snd_pcm_hw_info_t * info)
static int snd_pcm_alaw_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
{
snd_pcm_alaw_t *alaw = pcm->private;
unsigned int format_mask, access_mask;
snd_pcm_t *slave = alaw->plug.slave;
int err;
info->access_mask &= (SND_PCM_ACCBIT_MMAP_INTERLEAVED |
SND_PCM_ACCBIT_RW_INTERLEAVED |
SND_PCM_ACCBIT_MMAP_NONINTERLEAVED |
SND_PCM_ACCBIT_RW_NONINTERLEAVED);
access_mask = info->access_mask;
if (access_mask == 0)
return -EINVAL;
if (alaw->sformat == SND_PCM_FORMAT_MU_LAW)
info->format_mask &= SND_PCM_FMTBIT_LINEAR;
else
info->format_mask &= SND_PCM_FMTBIT_MU_LAW;
format_mask = info->format_mask;
if (format_mask == 0)
return -EINVAL;
info->format_mask = 1U << alaw->sformat;
info->access_mask = SND_PCM_ACCBIT_MMAP;
err = snd_pcm_hw_info(alaw->plug.slave, info);
info->format_mask = format_mask;
info->access_mask = access_mask;
snd_pcm_hw_params_t sparams;
mask_t *access_mask = alloca(mask_sizeof());
mask_t *saccess_mask = alloca(mask_sizeof());
mask_load(access_mask, SND_PCM_ACCBIT_PLUGIN);
mask_load(saccess_mask, SND_PCM_ACCBIT_MMAP);
err = _snd_pcm_hw_params_mask(params, 1, SND_PCM_HW_PARAM_ACCESS,
access_mask);
if (err < 0)
return err;
info->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
snd_pcm_hw_info_complete(info);
if (alaw->sformat == SND_PCM_FORMAT_A_LAW) {
mask_t *format_mask = alloca(mask_sizeof());
mask_load(format_mask, SND_PCM_FMTBIT_LINEAR);
err = _snd_pcm_hw_params_mask(params, 1,
SND_PCM_HW_PARAM_FORMAT,
format_mask);
if (err < 0)
return err;
} else {
err = _snd_pcm_hw_params_set(params, 1,
SND_PCM_HW_PARAM_FORMAT,
SND_PCM_FORMAT_A_LAW);
if (err < 0)
return err;
}
err = _snd_pcm_hw_params_set(params, 1, SND_PCM_HW_PARAM_SUBFORMAT,
SND_PCM_SUBFORMAT_STD);
if (err < 0)
return err;
_snd_pcm_hw_params_any(&sparams);
_snd_pcm_hw_params_mask(&sparams, 0, SND_PCM_HW_PARAM_ACCESS,
saccess_mask);
_snd_pcm_hw_params_set(&sparams, 0, SND_PCM_HW_PARAM_FORMAT,
alaw->sformat);
_snd_pcm_hw_params_set(&sparams, 0, SND_PCM_HW_PARAM_SUBFORMAT,
SND_PCM_SUBFORMAT_STD);
err = snd_pcm_hw_refine2(params, &sparams,
snd_pcm_hw_refine, slave,
SND_PCM_HW_PARBIT_CHANNELS |
SND_PCM_HW_PARBIT_RATE |
SND_PCM_HW_PARBIT_FRAGMENT_SIZE |
SND_PCM_HW_PARBIT_BUFFER_SIZE |
SND_PCM_HW_PARBIT_FRAGMENTS |
SND_PCM_HW_PARBIT_FRAGMENT_LENGTH |
SND_PCM_HW_PARBIT_BUFFER_LENGTH);
if (err < 0)
return err;
params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
return 0;
}
@ -247,27 +271,41 @@ static int snd_pcm_alaw_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
{
snd_pcm_alaw_t *alaw = pcm->private;
snd_pcm_t *slave = alaw->plug.slave;
snd_pcm_hw_info_t sinfo;
snd_pcm_hw_params_t sparams;
int err;
snd_pcm_hw_params_to_info(params, &sinfo);
sinfo.format_mask = 1 << alaw->sformat;
sinfo.access_mask = SND_PCM_ACCBIT_MMAP;
err = snd_pcm_hw_params_info(slave, &sparams, &sinfo);
params->fail_mask = sparams.fail_mask;
snd_pcm_hw_params_t sparams;
mask_t *saccess_mask = alloca(mask_sizeof());
mask_load(saccess_mask, SND_PCM_ACCBIT_MMAP);
_snd_pcm_hw_params_any(&sparams);
_snd_pcm_hw_params_mask(&sparams, 0, SND_PCM_HW_PARAM_ACCESS,
saccess_mask);
_snd_pcm_hw_params_set(&sparams, 0, SND_PCM_HW_PARAM_FORMAT,
alaw->sformat);
_snd_pcm_hw_params_set(&sparams, 0, SND_PCM_HW_PARAM_SUBFORMAT,
SND_PCM_SUBFORMAT_STD);
err = snd_pcm_hw_params2(params, &sparams,
snd_pcm_hw_params, slave,
SND_PCM_HW_PARBIT_CHANNELS |
SND_PCM_HW_PARBIT_RATE |
SND_PCM_HW_PARBIT_FRAGMENT_SIZE |
SND_PCM_HW_PARBIT_BUFFER_SIZE |
SND_PCM_HW_PARBIT_FRAGMENTS |
SND_PCM_HW_PARBIT_FRAGMENT_LENGTH |
SND_PCM_HW_PARBIT_BUFFER_LENGTH);
if (err < 0)
return err;
params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
if (alaw->sformat == SND_PCM_FORMAT_MU_LAW) {
alaw->getput_idx = get_index(params->format, SND_PCM_FORMAT_S16);
if (alaw->sformat == SND_PCM_FORMAT_A_LAW) {
alaw->getput_idx = get_index(snd_pcm_hw_params_value(params, SND_PCM_HW_PARAM_FORMAT), SND_PCM_FORMAT_S16);
alaw->func = alaw_encode;
} else {
alaw->getput_idx = put_index(SND_PCM_FORMAT_S16, alaw->sformat);
alaw->func = alaw_decode;
}
} else {
if (alaw->sformat == SND_PCM_FORMAT_MU_LAW) {
alaw->getput_idx = put_index(SND_PCM_FORMAT_S16, params->format);
if (alaw->sformat == SND_PCM_FORMAT_A_LAW) {
alaw->getput_idx = put_index(SND_PCM_FORMAT_S16, snd_pcm_hw_params_value(params, SND_PCM_HW_PARAM_FORMAT));
alaw->func = alaw_decode;
} else {
alaw->getput_idx = get_index(alaw->sformat, SND_PCM_FORMAT_S16);
@ -363,7 +401,7 @@ static void snd_pcm_alaw_dump(snd_pcm_t *pcm, FILE *fp)
snd_pcm_ops_t snd_pcm_alaw_ops = {
close: snd_pcm_plugin_close,
info: snd_pcm_plugin_info,
hw_info: snd_pcm_alaw_hw_info,
hw_refine: snd_pcm_alaw_hw_refine,
hw_params: snd_pcm_alaw_hw_params,
sw_params: snd_pcm_plugin_sw_params,
dig_info: snd_pcm_plugin_dig_info,