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added snd_pcm_hw_params_is_monotonic/can_forward/can_rewind functions

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This commit is contained in:
Jaroslav Kysela 2008-04-11 14:11:04 +02:00
parent d4250517f0
commit 82af1df465
4 changed files with 77 additions and 0 deletions
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3
include/pcm.h
View file

@ -518,7 +518,10 @@ int snd_pcm_hw_params_can_mmap_sample_resolution(const snd_pcm_hw_params_t *para
int snd_pcm_hw_params_is_double(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_is_batch(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_is_block_transfer(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_is_monotonic(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_can_overrange(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_can_forward(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_can_rewind(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_can_pause(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_can_resume(const snd_pcm_hw_params_t *params);
int snd_pcm_hw_params_is_half_duplex(const snd_pcm_hw_params_t *params);

63
src/pcm/pcm.c
View file

@ -2811,6 +2811,27 @@ int snd_pcm_hw_params_is_block_transfer(const snd_pcm_hw_params_t *params)
return !!(params->info & SNDRV_PCM_INFO_BLOCK_TRANSFER);
}
/**
* \brief Check, if timestamps are monotonic for given configuration
* \param params Configuration space
* \return Boolean value
* \retval 0 Device doesn't do monotomic timestamps
* \retval 1 Device does monotonic timestamps
*
* It is not allowed to call this function when given configuration is not exactly one.
* Usually, #snd_pcm_hw_params() function chooses one configuration
* from the configuration space.
*/
int snd_pcm_hw_params_is_monotonic(const snd_pcm_hw_params_t *params)
{
assert(params);
if (CHECK_SANITY(params->info == ~0U)) {
SNDMSG("invalid PCM info field");
return 0; /* FIXME: should be a negative error? */
}
return !!(params->info & SND_PCM_INFO_MONOTONIC);
}
/**
* \brief Check, if hardware supports overrange detection
* \param params Configuration space
@ -2832,6 +2853,48 @@ int snd_pcm_hw_params_can_overrange(const snd_pcm_hw_params_t *params)
return !!(params->info & SNDRV_PCM_INFO_OVERRANGE);
}
/**
* \brief Check, if device supports forward
* \param params Configuration space
* \return Boolean value
* \retval 0 Device doesn't support forward
* \retval 1 Device supports forward
*
* It is not allowed to call this function when given configuration is not exactly one.
* Usually, #snd_pcm_hw_params() function chooses one configuration
* from the configuration space.
*/
int snd_pcm_hw_params_can_forward(const snd_pcm_hw_params_t *params)
{
assert(params);
if (CHECK_SANITY(params->info == ~0U)) {
SNDMSG("invalid PCM info field");
return 0; /* FIXME: should be a negative error? */
}
return !!(params->info & SND_PCM_INFO_FORWARD);
}
/**
* \brief Check, if device supports rewind
* \param params Configuration space
* \return Boolean value
* \retval 0 Device doesn't support rewind
* \retval 1 Device supports rewind
*
* It is not allowed to call this function when given configuration is not exactly one.
* Usually, #snd_pcm_hw_params() function chooses one configuration
* from the configuration space.
*/
int snd_pcm_hw_params_can_rewind(const snd_pcm_hw_params_t *params)
{
assert(params);
if (CHECK_SANITY(params->info == ~0U)) {
SNDMSG("invalid PCM info field");
return 0; /* FIXME: should be a negative error? */
}
return !!(params->info & SND_PCM_INFO_REWIND);
}
/**
* \brief Check, if hardware supports pause
* \param params Configuration space

7
src/pcm/pcm_hw.c
View file

@ -246,6 +246,13 @@ static int snd_pcm_hw_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
return err;
}
if (params->info != ~0UL) {
params->info &= ~0xf0000000;
params->info |= (pcm->monotonic ? SND_PCM_INFO_MONOTONIC : 0) |
SND_PCM_INFO_REWIND |
SND_PCM_INFO_FORWARD;
}
return 0;
}

4
src/pcm/pcm_local.h
View file

@ -95,6 +95,10 @@ typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
#define SND_PCM_HW_PARAMS_NORESAMPLE SNDRV_PCM_HW_PARAMS_NORESAMPLE
#define SND_PCM_HW_PARAMS_EXPORT_BUFFER SNDRV_PCM_HW_PARAMS_EXPORT_BUFFER
#define SND_PCM_INFO_FORWARD 0x10000000
#define SND_PCM_INFO_REWIND 0x20000000
#define SND_PCM_INFO_MONOTONIC 0x80000000
typedef struct _snd_pcm_rbptr {
snd_pcm_t *master;
volatile snd_pcm_uframes_t *ptr;