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Added possibility to disable also channel and format conversions + softvol.

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Unified disable option using mode bits in snd_pcm_open().
This commit is contained in:
Jaroslav Kysela 2008-01-11 17:21:44 +01:00
parent 6814d23d29
commit ab8331c882
3 changed files with 55 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

12
include/pcm.h
View file

@ -292,9 +292,17 @@ typedef unsigned long snd_pcm_uframes_t;
typedef long snd_pcm_sframes_t;
/** Non blocking mode (flag for open mode) \hideinitializer */
#define SND_PCM_NONBLOCK 0x0001
#define SND_PCM_NONBLOCK 0x00000001
/** Async notification (flag for open mode) \hideinitializer */
#define SND_PCM_ASYNC 0x0002
#define SND_PCM_ASYNC 0x00000002
/** Disable automatic (but not forced!) rate resamplinig */
#define SND_PCM_NO_AUTO_RESAMPLE 0x00010000
/** Disable automatic (but not forced!) channel conversion */
#define SND_PCM_NO_AUTO_CHANNELS 0x00020000
/** Disable automatic (but not forced!) format conversion */
#define SND_PCM_NO_AUTO_FORMAT 0x00040000
/** Disable soft volume control */
#define SND_PCM_NO_SOFTVOL 0x00080000
/** PCM handle */
typedef struct _snd_pcm snd_pcm_t;

20
src/pcm/pcm_plug.c
View file

@ -707,7 +707,9 @@ static int snd_pcm_plug_hw_refine_schange(snd_pcm_t *pcm, snd_pcm_hw_params_t *p
snd_interval_t t, buffer_size;
const snd_interval_t *srate, *crate;
if (plug->srate == -2)
if (plug->srate == -2 ||
(pcm->mode & pcm->mode & SND_PCM_NO_AUTO_RESAMPLE) ||
(params->flags & SND_PCM_HW_PARAMS_NORESAMPLE))
links |= SND_PCM_HW_PARBIT_RATE;
else {
err = snd_pcm_hw_param_refine_multiple(slave, sparams, SND_PCM_HW_PARAM_RATE, params);
@ -715,14 +717,14 @@ static int snd_pcm_plug_hw_refine_schange(snd_pcm_t *pcm, snd_pcm_hw_params_t *p
return err;
}
if (plug->schannels == -2)
if (plug->schannels == -2 || (pcm->mode & SND_PCM_NO_AUTO_CHANNELS))
links |= SND_PCM_HW_PARBIT_CHANNELS;
else {
err = snd_pcm_hw_param_refine_near(slave, sparams, SND_PCM_HW_PARAM_CHANNELS, params);
if (err < 0)
return err;
}
if (plug->sformat == -2)
if (plug->sformat == -2 || (pcm->mode & SND_PCM_NO_AUTO_FORMAT))
links |= SND_PCM_HW_PARBIT_FORMAT;
else {
format_mask = snd_pcm_hw_param_get_mask(params, SND_PCM_HW_PARAM_FORMAT);
@ -791,8 +793,6 @@ static int snd_pcm_plug_hw_refine_schange(snd_pcm_t *pcm, snd_pcm_hw_params_t *p
err = _snd_pcm_hw_params_refine(sparams, links, params);
if (err < 0)
return err;
if (params->flags & SND_PCM_HW_PARAMS_NORESAMPLE)
snd_interval_copy((snd_interval_t *)snd_pcm_hw_param_get_interval(params, SND_PCM_HW_PARAM_RATE), snd_pcm_hw_param_get_interval(sparams, SND_PCM_HW_PARAM_RATE));
return 0;
}
@ -811,10 +811,10 @@ static int snd_pcm_plug_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED,
const snd_interval_t *sbuffer_size;
const snd_interval_t *srate, *crate;
if (plug->schannels == -2)
if (plug->schannels == -2 || (pcm->mode & SND_PCM_NO_AUTO_CHANNELS))
links |= SND_PCM_HW_PARBIT_CHANNELS;
if (plug->sformat == -2)
if (plug->sformat == -2 || (pcm->mode & SND_PCM_NO_AUTO_FORMAT))
links |= SND_PCM_HW_PARBIT_FORMAT;
else {
format_mask = snd_pcm_hw_param_get_mask(params,
@ -857,7 +857,9 @@ static int snd_pcm_plug_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED,
return err;
}
if (plug->srate == -2)
if (plug->srate == -2 ||
(pcm->mode & SND_PCM_NO_AUTO_RESAMPLE) ||
(params->flags & SND_PCM_HW_PARAMS_NORESAMPLE))
links |= SND_PCM_HW_PARBIT_RATE;
else {
unsigned int rate_min, srate_min;
@ -895,8 +897,6 @@ static int snd_pcm_plug_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED,
err = _snd_pcm_hw_params_refine(params, links, sparams);
if (err < 0)
return err;
if (params->flags & SND_PCM_HW_PARAMS_NORESAMPLE)
snd_interval_copy((snd_interval_t *)snd_pcm_hw_param_get_interval(params, SND_PCM_HW_PARAM_RATE), snd_pcm_hw_param_get_interval(sparams, SND_PCM_HW_PARAM_RATE));
/* FIXME */
params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
return 0;

11
src/pcm/pcm_softvol.c
View file

@ -969,6 +969,15 @@ int _snd_pcm_softvol_open(snd_pcm_t **pcmp, const char *name,
SNDERR("Invalid resolution value %d", resolution);
return -EINVAL;
}
if (mode & SND_PCM_NO_SOFTVOL) {
err = snd_pcm_slave_conf(root, slave, &sconf, 0);
if (err < 0)
return err;
err = snd_pcm_open_named_slave(pcmp, name, root, sconf, stream,
mode, conf);
snd_config_delete(sconf);
} else {
snd_ctl_elem_id_alloca(&ctl_id);
err = snd_pcm_slave_conf(root, slave, &sconf, 1,
SND_PCM_HW_PARAM_FORMAT, 0, &sformat);
if (err < 0)
@ -988,7 +997,6 @@ int _snd_pcm_softvol_open(snd_pcm_t **pcmp, const char *name,
snd_config_delete(sconf);
if (err < 0)
return err;
snd_ctl_elem_id_alloca(&ctl_id);
if ((err = snd_pcm_parse_control_id(control, ctl_id, &card, &cchannels, NULL)) < 0) {
snd_pcm_close(spcm);
return err;
@ -997,6 +1005,7 @@ int _snd_pcm_softvol_open(snd_pcm_t **pcmp, const char *name,
min_dB, max_dB, resolution, spcm, 1);
if (err < 0)
snd_pcm_close(spcm);
}
return err;
}
#ifndef DOC_HIDDEN