diff options
Diffstat (limited to 'include/sound/pcm.h')
| -rw-r--r-- | include/sound/pcm.h | 254 |
1 files changed, 223 insertions, 31 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 8bb00a2..1e7f74a 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -418,7 +418,10 @@ struct snd_pcm_substream { struct snd_info_entry *proc_status_entry; struct snd_info_entry *proc_prealloc_entry; struct snd_info_entry *proc_prealloc_max_entry; +#ifdef CONFIG_SND_PCM_XRUN_DEBUG + struct snd_info_entry *proc_xrun_injection_entry; #endif +#endif /* CONFIG_SND_VERBOSE_PROCFS */ /* misc flags */ unsigned int hw_opened: 1; }; @@ -505,6 +508,7 @@ int snd_pcm_status(struct snd_pcm_substream *substream, int snd_pcm_start(struct snd_pcm_substream *substream); int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); int snd_pcm_drain_done(struct snd_pcm_substream *substream); +int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); #ifdef CONFIG_PM int snd_pcm_suspend(struct snd_pcm_substream *substream); int snd_pcm_suspend_all(struct snd_pcm *pcm); @@ -535,6 +539,12 @@ snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) * PCM library */ +/** + * snd_pcm_stream_linked - Check whether the substream is linked with others + * @substream: substream to check + * + * Returns true if the given substream is being linked with others. + */ static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) { return substream->group != &substream->self_group; @@ -545,6 +555,16 @@ void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); + +/** + * snd_pcm_stream_lock_irqsave - Lock the PCM stream + * @substream: PCM substream + * @flags: irq flags + * + * This locks the PCM stream like snd_pcm_stream_lock() but with the local + * IRQ (only when nonatomic is false). In nonatomic case, this is identical + * as snd_pcm_stream_lock(). + */ #define snd_pcm_stream_lock_irqsave(substream, flags) \ do { \ typecheck(unsigned long, flags); \ @@ -553,9 +573,25 @@ unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, unsigned long flags); +/** + * snd_pcm_group_for_each_entry - iterate over the linked substreams + * @s: the iterator + * @substream: the substream + * + * Iterate over the all linked substreams to the given @substream. + * When @substream isn't linked with any others, this gives returns @substream + * itself once. + */ #define snd_pcm_group_for_each_entry(s, substream) \ list_for_each_entry(s, &substream->group->substreams, link_list) +/** + * snd_pcm_running - Check whether the substream is in a running state + * @substream: substream to check + * + * Returns true if the given substream is in the state RUNNING, or in the + * state DRAINING for playback. + */ static inline int snd_pcm_running(struct snd_pcm_substream *substream) { return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || @@ -563,45 +599,81 @@ static inline int snd_pcm_running(struct snd_pcm_substream *substream) substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); } +/** + * bytes_to_samples - Unit conversion of the size from bytes to samples + * @runtime: PCM runtime instance + * @size: size in bytes + */ static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) { return size * 8 / runtime->sample_bits; } +/** + * bytes_to_frames - Unit conversion of the size from bytes to frames + * @runtime: PCM runtime instance + * @size: size in bytes + */ static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) { return size * 8 / runtime->frame_bits; } +/** + * samples_to_bytes - Unit conversion of the size from samples to bytes + * @runtime: PCM runtime instance + * @size: size in samples + */ static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) { return size * runtime->sample_bits / 8; } +/** + * frames_to_bytes - Unit conversion of the size from frames to bytes + * @runtime: PCM runtime instance + * @size: size in frames + */ static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) { return size * runtime->frame_bits / 8; } +/** + * frame_aligned - Check whether the byte size is aligned to frames + * @runtime: PCM runtime instance + * @bytes: size in bytes + */ static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) { return bytes % runtime->byte_align == 0; } +/** + * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes + * @substream: PCM substream + */ static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; return frames_to_bytes(runtime, runtime->buffer_size); } +/** + * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes + * @substream: PCM substream + */ static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; return frames_to_bytes(runtime, runtime->period_size); } -/* - * result is: 0 ... (boundary - 1) +/** + * snd_pcm_playback_avail - Get the available (writable) space for playback + * @runtime: PCM runtime instance + * + * Result is between 0 ... (boundary - 1) */ static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) { @@ -613,8 +685,11 @@ static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *r return avail; } -/* - * result is: 0 ... (boundary - 1) +/** + * snd_pcm_playback_avail - Get the available (readable) space for capture + * @runtime: PCM runtime instance + * + * Result is between 0 ... (boundary - 1) */ static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) { @@ -624,11 +699,19 @@ static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *ru return avail; } +/** + * snd_pcm_playback_hw_avail - Get the queued space for playback + * @runtime: PCM runtime instance + */ static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) { return runtime->buffer_size - snd_pcm_playback_avail(runtime); } +/** + * snd_pcm_capture_hw_avail - Get the free space for capture + * @runtime: PCM runtime instance + */ static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) { return runtime->buffer_size - snd_pcm_capture_avail(runtime); @@ -708,6 +791,20 @@ static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) return snd_pcm_capture_avail(runtime) == 0; } +/** + * snd_pcm_trigger_done - Mark the master substream + * @substream: the pcm substream instance + * @master: the linked master substream + * + * When multiple substreams of the same card are linked and the hardware + * supports the single-shot operation, the driver calls this in the loop + * in snd_pcm_group_for_each_entry() for marking the substream as "done". + * Then most of trigger operations are performed only to the given master + * substream. + * + * The trigger_master mark is cleared at timestamp updates at the end + * of trigger operations. + */ static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, struct snd_pcm_substream *master) { @@ -750,18 +847,59 @@ static inline const struct snd_interval *hw_param_interval_c(const struct snd_pc return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; } -#define params_channels(p) \ - (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min) -#define params_rate(p) \ - (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min) -#define params_period_size(p) \ - (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min) -#define params_periods(p) \ - (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min) -#define params_buffer_size(p) \ - (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min) -#define params_buffer_bytes(p) \ - (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min) +/** + * params_channels - Get the number of channels from the hw params + * @p: hw params + */ +static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) +{ + return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; +} + +/** + * params_channels - Get the sample rate from the hw params + * @p: hw params + */ +static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) +{ + return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; +} + +/** + * params_channels - Get the period size (in frames) from the hw params + * @p: hw params + */ +static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) +{ + return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; +} + +/** + * params_channels - Get the number of periods from the hw params + * @p: hw params + */ +static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) +{ + return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; +} + +/** + * params_channels - Get the buffer size (in frames) from the hw params + * @p: hw params + */ +static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) +{ + return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; +} + +/** + * params_channels - Get the buffer size (in bytes) from the hw params + * @p: hw params + */ +static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) +{ + return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; +} int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); @@ -883,6 +1021,14 @@ unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, unsigned int rates_b); +/** + * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer + * @substream: PCM substream to set + * @bufp: the buffer information, NULL to clear + * + * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. + * Otherwise it clears the current buffer information. + */ static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, struct snd_dma_buffer *bufp) { @@ -908,6 +1054,11 @@ void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); void snd_pcm_timer_init(struct snd_pcm_substream *substream); void snd_pcm_timer_done(struct snd_pcm_substream *substream); +/** + * snd_pcm_gettime - Fill the timespec depending on the timestamp mode + * @runtime: PCM runtime instance + * @tv: timespec to fill + */ static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, struct timespec *tv) { @@ -944,7 +1095,6 @@ int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, unsigned long offset); -#if 0 /* for kernel-doc */ /** * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer * @substream: the substream to allocate the buffer to @@ -957,8 +1107,13 @@ struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, * Return: 1 if the buffer was changed, 0 if not changed, or a negative error * code. */ -static int snd_pcm_lib_alloc_vmalloc_buffer - (struct snd_pcm_substream *substream, size_t size); +static inline int snd_pcm_lib_alloc_vmalloc_buffer + (struct snd_pcm_substream *substream, size_t size) +{ + return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, + GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); +} + /** * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer * @substream: the substream to allocate the buffer to @@ -970,15 +1125,12 @@ static int snd_pcm_lib_alloc_vmalloc_buffer * Return: 1 if the buffer was changed, 0 if not changed, or a negative error * code. */ -static int snd_pcm_lib_alloc_vmalloc_32_buffer - (struct snd_pcm_substream *substream, size_t size); -#endif -#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ - _snd_pcm_lib_alloc_vmalloc_buffer \ - (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) -#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ - _snd_pcm_lib_alloc_vmalloc_buffer \ - (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) +static inline int snd_pcm_lib_alloc_vmalloc_32_buffer + (struct snd_pcm_substream *substream, size_t size) +{ + return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, + GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); +} #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) @@ -998,18 +1150,35 @@ struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, #define snd_pcm_sgbuf_ops_page NULL #endif /* SND_DMA_SGBUF */ +/** + * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset + * @substream: PCM substream + * @ofs: byte offset + */ static inline dma_addr_t snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) { return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); } +/** + * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset + * @substream: PCM substream + * @ofs: byte offset + */ static inline void * snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) { return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); } +/** + * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. + * page from the given size + * @substream: PCM substream + * @ofs: byte offset + * @size: byte size to examine + */ static inline unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, unsigned int ofs, unsigned int size) @@ -1017,13 +1186,24 @@ snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); } -/* handle mmap counter - PCM mmap callback should handle this counter properly */ +/** + * snd_pcm_mmap_data_open - increase the mmap counter + * @area: VMA + * + * PCM mmap callback should handle this counter properly + */ static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) { struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; atomic_inc(&substream->mmap_count); } +/** + * snd_pcm_mmap_data_close - decrease the mmap counter + * @area: VMA + * + * PCM mmap callback should handle this counter properly + */ static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) { struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; @@ -1043,6 +1223,11 @@ int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_s #define snd_pcm_lib_mmap_vmalloc NULL +/** + * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer + * @dma: DMA number + * @max: pointer to store the max size + */ static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) { *max = dma < 4 ? 64 * 1024 : 128 * 1024; @@ -1095,7 +1280,11 @@ struct snd_pcm_chmap { void *private_data; /* optional: private data pointer */ }; -/* get the PCM substream assigned to the given chmap info */ +/** + * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info + * @info: chmap information + * @idx: the substream number index + */ static inline struct snd_pcm_substream * snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) { @@ -1122,7 +1311,10 @@ int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, unsigned long private_value, struct snd_pcm_chmap **info_ret); -/* Strong-typed conversion of pcm_format to bitwise */ +/** + * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise + * @pcm_format: PCM format + */ static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) { return 1ULL << (__force int) pcm_format; |
