/*
* Digital Audio (PCM) abstract layer
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Abramo Bagnara <abramo@alsa-project.org>
*
*
snd_pcm_uframes_t period_size; /* period size */
unsigned int periods; /* periods */
snd_pcm_uframes_t buffer_size; /* buffer size */
- unsigned int tick_time; /* tick time */
snd_pcm_uframes_t min_align; /* Min alignment for the format */
size_t byte_align;
unsigned int frame_bits;
/* -- SW params -- */
int tstamp_mode; /* mmap timestamp is updated */
unsigned int period_step;
- unsigned int sleep_min; /* min ticks to sleep */
- snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
snd_pcm_uframes_t start_threshold;
snd_pcm_uframes_t stop_threshold;
snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
union snd_pcm_sync_id sync; /* hardware synchronization ID */
/* -- mmap -- */
- volatile struct snd_pcm_mmap_status *status;
- volatile struct snd_pcm_mmap_control *control;
+ struct snd_pcm_mmap_status *status;
+ struct snd_pcm_mmap_control *control;
/* -- locking / scheduling -- */
wait_queue_head_t sleep;
- struct timer_list tick_timer;
struct fasync_struct *fasync;
/* -- private section -- */
/* -- timer -- */
unsigned int timer_resolution; /* timer resolution */
+ int tstamp_type; /* timestamp type */
/* -- DMA -- */
unsigned char *dma_area; /* DMA area */
read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
} while (0)
-#define snd_pcm_group_for_each(pos, substream) \
- list_for_each(pos, &substream->group->substreams)
-
-#define snd_pcm_group_substream_entry(pos) \
- list_entry(pos, struct snd_pcm_substream, link_list)
+#define snd_pcm_group_for_each_entry(s, substream) \
+ list_for_each_entry(s, &substream->group->substreams, link_list)
static inline int snd_pcm_running(struct snd_pcm_substream *substream)
{
static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var)
{
- return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var);
+ return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
}
static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var)
{
- return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var);
+ return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}
#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
-#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
-void snd_pcm_tick_prepare(struct snd_pcm_substream *substream);
-void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks);
-void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream);
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
const void __user *buf,
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
void __user **bufs, snd_pcm_uframes_t frames);
+extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
+
int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
+unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
struct snd_dma_buffer *bufp)
void snd_pcm_timer_init(struct snd_pcm_substream *substream);
void snd_pcm_timer_done(struct snd_pcm_substream *substream);
+static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
+ struct timespec *tv)
+{
+ if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
+ do_posix_clock_monotonic_gettime(tv);
+ else
+ getnstimeofday(tv);
+}
+
/*
* Memory
*/