/**************************************************************************** * * * pcm.h * * Digital Audio Interface * * * ****************************************************************************/ typedef struct _snd_pcm_info snd_pcm_info_t; typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t; typedef struct _snd_pcm_sw_params snd_pcm_sw_params_t; typedef struct _snd_pcm_status snd_pcm_status_t; typedef struct _snd_pcm_access_mask snd_pcm_access_mask_t; typedef struct _snd_pcm_format_mask snd_pcm_format_mask_t; typedef struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t; #ifdef SND_ENUM_TYPECHECK typedef struct __snd_pcm_class *snd_pcm_class_t; typedef struct __snd_pcm_subclass *snd_pcm_subclass_t; typedef struct __snd_pcm_stream *snd_pcm_stream_t; typedef struct __snd_pcm_access *snd_pcm_access_t; typedef struct __snd_pcm_format *snd_pcm_format_t; typedef struct __snd_pcm_subformat *snd_pcm_subformat_t; typedef struct __snd_pcm_state *snd_pcm_state_t; typedef struct __snd_pcm_start *snd_pcm_start_t; typedef struct __snd_pcm_xrun *snd_pcm_xrun_t; typedef struct __snd_pcm_tstamp *snd_pcm_tstamp_t; #else typedef enum sndrv_pcm_class snd_pcm_class_t; typedef enum sndrv_pcm_subclass snd_pcm_subclass_t; typedef enum sndrv_pcm_stream snd_pcm_stream_t; typedef enum sndrv_pcm_access snd_pcm_access_t; typedef enum sndrv_pcm_format snd_pcm_format_t; typedef enum sndrv_pcm_subformat snd_pcm_subformat_t; typedef enum sndrv_pcm_state snd_pcm_state_t; typedef enum sndrv_pcm_start snd_pcm_start_t; typedef enum sndrv_pcm_xrun snd_pcm_xrun_t; typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t; #endif #define SND_PCM_CLASS_GENERIC ((snd_pcm_class_t) SNDRV_PCM_CLASS_GENERIC) #define SND_PCM_CLASS_MULTI ((snd_pcm_class_t) SNDRV_PCM_CLASS_MULTI) #define SND_PCM_CLASS_MODEM ((snd_pcm_class_t) SNDRV_PCM_CLASS_MODEM) #define SND_PCM_CLASS_DIGITIZER ((snd_pcm_class_t) SNDRV_PCM_CLASS_DIGITIZER) #define SND_PCM_CLASS_LAST ((snd_pcm_class_t) SNDRV_PCM_CLASS_LAST) #define SND_PCM_SUBCLASS_GENERIC_MIX ((snd_pcm_subclass_t) SNDRV_PCM_SUBCLASS_GENERIC_MIX) #define SND_PCM_SUBCLASS_MULTI_MIX ((snd_pcm_subclass_t) SNDRV_PCM_SUBCLASS_MULTI_MIX) #define SND_PCM_SUBCLASS_LAST ((snd_pcm_subclass_t) SNDRV_PCM_SUBCLASS_LAST) #define SND_PCM_STREAM_PLAYBACK ((snd_pcm_stream_t) SNDRV_PCM_STREAM_PLAYBACK) #define SND_PCM_STREAM_CAPTURE ((snd_pcm_stream_t) SNDRV_PCM_STREAM_CAPTURE) #define SND_PCM_STREAM_LAST ((snd_pcm_stream_t) SNDRV_PCM_STREAM_LAST) #define SND_PCM_ACCESS_MMAP_INTERLEAVED ((snd_pcm_access_t) SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) #define SND_PCM_ACCESS_MMAP_NONINTERLEAVED ((snd_pcm_access_t) SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED) #define SND_PCM_ACCESS_MMAP_COMPLEX ((snd_pcm_access_t) SNDRV_PCM_ACCESS_MMAP_COMPLEX) #define SND_PCM_ACCESS_RW_INTERLEAVED ((snd_pcm_access_t) SNDRV_PCM_ACCESS_RW_INTERLEAVED) #define SND_PCM_ACCESS_RW_NONINTERLEAVED ((snd_pcm_access_t) SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) #define SND_PCM_ACCESS_LAST ((snd_pcm_access_t) SNDRV_PCM_ACCESS_LAST) #define SND_PCM_FORMAT_UNKNOWN ((snd_pcm_format_t) -1) #define SND_PCM_FORMAT_S8 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S8) #define SND_PCM_FORMAT_U8 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U8) #define SND_PCM_FORMAT_S16_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S16_LE) #define SND_PCM_FORMAT_S16_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S16_BE) #define SND_PCM_FORMAT_U16_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U16_LE) #define SND_PCM_FORMAT_U16_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U16_BE) #define SND_PCM_FORMAT_S24_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S24_LE) #define SND_PCM_FORMAT_S24_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S24_BE) #define SND_PCM_FORMAT_U24_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U24_LE) #define SND_PCM_FORMAT_U24_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U24_BE) #define SND_PCM_FORMAT_S32_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S32_LE) #define SND_PCM_FORMAT_S32_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S32_BE) #define SND_PCM_FORMAT_U32_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U32_LE) #define SND_PCM_FORMAT_U32_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U32_BE) #define SND_PCM_FORMAT_FLOAT_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT_LE) #define SND_PCM_FORMAT_FLOAT_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT_BE) #define SND_PCM_FORMAT_FLOAT64_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT64_LE) #define SND_PCM_FORMAT_FLOAT64_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT64_BE) #define SND_PCM_FORMAT_IEC958_SUBFRAME_LE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) #define SND_PCM_FORMAT_IEC958_SUBFRAME_BE ((snd_pcm_format_t) SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) #define SND_PCM_FORMAT_MU_LAW ((snd_pcm_format_t) SNDRV_PCM_FORMAT_MU_LAW) #define SND_PCM_FORMAT_A_LAW ((snd_pcm_format_t) SNDRV_PCM_FORMAT_A_LAW) #define SND_PCM_FORMAT_IMA_ADPCM ((snd_pcm_format_t) SNDRV_PCM_FORMAT_IMA_ADPCM) #define SND_PCM_FORMAT_MPEG ((snd_pcm_format_t) SNDRV_PCM_FORMAT_MPEG) #define SND_PCM_FORMAT_GSM ((snd_pcm_format_t) SNDRV_PCM_FORMAT_GSM) #define SND_PCM_FORMAT_SPECIAL ((snd_pcm_format_t) SNDRV_PCM_FORMAT_SPECIAL) #define SND_PCM_FORMAT_LAST ((snd_pcm_format_t) SNDRV_PCM_FORMAT_LAST) #define SND_PCM_FORMAT_S16 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S16) #define SND_PCM_FORMAT_U16 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U16) #define SND_PCM_FORMAT_S24 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S24) #define SND_PCM_FORMAT_U24 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U24) #define SND_PCM_FORMAT_S32 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S32) #define SND_PCM_FORMAT_U32 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U32) #define SND_PCM_FORMAT_FLOAT ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT) #define SND_PCM_FORMAT_FLOAT64 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT64) #define SND_PCM_FORMAT_IEC958_SUBFRAME ((snd_pcm_format_t) SNDRV_PCM_FORMAT_IEC958_SUBFRAME) #define SND_PCM_FORMAT_S16 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S16) #define SND_PCM_FORMAT_U16 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U16) #define SND_PCM_FORMAT_S24 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S24) #define SND_PCM_FORMAT_U24 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U24) #define SND_PCM_FORMAT_S32 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_S32) #define SND_PCM_FORMAT_U32 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_U32) #define SND_PCM_FORMAT_FLOAT ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT) #define SND_PCM_FORMAT_FLOAT64 ((snd_pcm_format_t) SNDRV_PCM_FORMAT_FLOAT64) #define SND_PCM_FORMAT_IEC958_SUBFRAME ((snd_pcm_format_t) SNDRV_PCM_FORMAT_IEC958_SUBFRAME) #define SND_PCM_SUBFORMAT_STD ((snd_pcm_subformat_t) SNDRV_PCM_SUBFORMAT_STD) #define SND_PCM_SUBFORMAT_LAST ((snd_pcm_subformat_t) SNDRV_PCM_SUBFORMAT_LAST) #define SND_PCM_STATE_OPEN ((snd_pcm_state_t) SNDRV_PCM_STATE_OPEN) #define SND_PCM_STATE_SETUP ((snd_pcm_state_t) SNDRV_PCM_STATE_SETUP) #define SND_PCM_STATE_PREPARED ((snd_pcm_state_t) SNDRV_PCM_STATE_PREPARED) #define SND_PCM_STATE_RUNNING ((snd_pcm_state_t) SNDRV_PCM_STATE_RUNNING) #define SND_PCM_STATE_XRUN ((snd_pcm_state_t) SNDRV_PCM_STATE_XRUN) #define SND_PCM_STATE_DRAINING ((snd_pcm_state_t) SNDRV_PCM_STATE_DRAINING) #define SND_PCM_STATE_PAUSED ((snd_pcm_state_t) SNDRV_PCM_STATE_PAUSED) #define SND_PCM_STATE_LAST ((snd_pcm_state_t) SNDRV_PCM_STATE_LAST) #define SND_PCM_START_DATA ((snd_pcm_start_t) SNDRV_PCM_START_DATA) #define SND_PCM_START_EXPLICIT ((snd_pcm_start_t) SNDRV_PCM_START_EXPLICIT) #define SND_PCM_START_LAST ((snd_pcm_start_t) SNDRV_PCM_START_LAST) #define SND_PCM_XRUN_NONE ((snd_pcm_xrun_t) SNDRV_PCM_XRUN_NONE) #define SND_PCM_XRUN_STOP ((snd_pcm_xrun_t) SNDRV_PCM_XRUN_STOP) #define SND_PCM_XRUN_LAST ((snd_pcm_xrun_t) SNDRV_PCM_XRUN_LAST) #define SND_PCM_TSTAMP_NONE ((snd_pcm_tstamp_t) SNDRV_PCM_TSTAMP_NONE) #define SND_PCM_TSTAMP_MMAP ((snd_pcm_tstamp_t) SNDRV_PCM_TSTAMP_MMAP) #define SND_PCM_TSTAMP_LAST ((snd_pcm_tstamp_t) SNDRV_PCM_TSTAMP_LAST) typedef sndrv_pcm_uframes_t snd_pcm_uframes_t; typedef sndrv_pcm_sframes_t snd_pcm_sframes_t; typedef struct timeval snd_timestamp_t; #define SND_PCM_INFO_MMAP SNDRV_PCM_INFO_MMAP #define SND_PCM_INFO_MMAP_VALID SNDRV_PCM_INFO_MMAP_VALID #define SND_PCM_INFO_DOUBLE SNDRV_PCM_INFO_DOUBLE #define SND_PCM_INFO_BATCH SNDRV_PCM_INFO_BATCH #define SND_PCM_INFO_INTERLEAVED SNDRV_PCM_INFO_INTERLEAVED #define SND_PCM_INFO_NONINTERLEAVED SNDRV_PCM_INFO_NONINTERLEAVED #define SND_PCM_INFO_COMPLEX SNDRV_PCM_INFO_COMPLEX #define SND_PCM_INFO_BLOCK_TRANSFER SNDRV_PCM_INFO_BLOCK_TRANSFER #define SND_PCM_INFO_OVERRANGE SNDRV_PCM_INFO_OVERRANGE #define SND_PCM_INFO_PAUSE SNDRV_PCM_INFO_PAUSE #define SND_PCM_INFO_HALF_DUPLEX SNDRV_PCM_INFO_HALF_DUPLEX #define SND_PCM_INFO_JOINT_DUPLEX SNDRV_PCM_INFO_JOINT_DUPLEX #define SND_PCM_INFO_SYNC_START SNDRV_PCM_INFO_SYNC_START #define SND_PCM_MMAP_OFFSET_DATA SNDRV_PCM_MMAP_OFFSET_DATA #define SND_PCM_MMAP_OFFSET_STATUS SNDRV_PCM_MMAP_OFFSET_STATUS #define SND_PCM_MMAP_OFFSET_CONTROL SNDRV_PCM_MMAP_OFFSET_CONTROL #define SND_PCM_NONBLOCK 0x0001 #define SND_PCM_ASYNC 0x0002 typedef struct _snd_pcm snd_pcm_t; enum _snd_pcm_type { SND_PCM_TYPE_HW, SND_PCM_TYPE_MULTI, SND_PCM_TYPE_FILE, SND_PCM_TYPE_NULL, SND_PCM_TYPE_SHM, SND_PCM_TYPE_INET, SND_PCM_TYPE_COPY, SND_PCM_TYPE_LINEAR, SND_PCM_TYPE_ALAW, SND_PCM_TYPE_MULAW, SND_PCM_TYPE_ADPCM, SND_PCM_TYPE_RATE, SND_PCM_TYPE_ROUTE, SND_PCM_TYPE_PLUG, SND_PCM_TYPE_SHARE, SND_PCM_TYPE_METER, SND_PCM_TYPE_MIX, SND_PCM_TYPE_DROUTE, SND_PCM_TYPE_LBSERVER, }; #ifdef SND_ENUM_TYPECHECK typedef struct __snd_pcm_type *snd_pcm_type_t; #else typedef enum _snd_pcm_type snd_pcm_type_t; #endif #define SND_PCM_TYPE_HW ((snd_pcm_type_t) SND_PCM_TYPE_HW) #define SND_PCM_TYPE_MULTI ((snd_pcm_type_t) SND_PCM_TYPE_MULTI) #define SND_PCM_TYPE_FILE ((snd_pcm_type_t) SND_PCM_TYPE_FILE) #define SND_PCM_TYPE_NULL ((snd_pcm_type_t) SND_PCM_TYPE_NULL) #define SND_PCM_TYPE_SHM ((snd_pcm_type_t) SND_PCM_TYPE_SHM) #define SND_PCM_TYPE_INET ((snd_pcm_type_t) SND_PCM_TYPE_INET) #define SND_PCM_TYPE_COPY ((snd_pcm_type_t) SND_PCM_TYPE_COPY) #define SND_PCM_TYPE_LINEAR ((snd_pcm_type_t) SND_PCM_TYPE_LINEAR) #define SND_PCM_TYPE_ALAW ((snd_pcm_type_t) SND_PCM_TYPE_ALAW) #define SND_PCM_TYPE_MULAW ((snd_pcm_type_t) SND_PCM_TYPE_MULAW) #define SND_PCM_TYPE_ADPCM ((snd_pcm_type_t) SND_PCM_TYPE_ADPCM) #define SND_PCM_TYPE_RATE ((snd_pcm_type_t) SND_PCM_TYPE_RATE) #define SND_PCM_TYPE_ROUTE ((snd_pcm_type_t) SND_PCM_TYPE_ROUTE) #define SND_PCM_TYPE_PLUG ((snd_pcm_type_t) SND_PCM_TYPE_PLUG) #define SND_PCM_TYPE_SHARE ((snd_pcm_type_t) SND_PCM_TYPE_SHARE) #define SND_PCM_TYPE_METER ((snd_pcm_type_t) SND_PCM_TYPE_METER) #define SND_PCM_TYPE_MIX ((snd_pcm_type_t) SND_PCM_TYPE_MIX) #define SND_PCM_TYPE_DROUTE ((snd_pcm_type_t) SND_PCM_TYPE_DROUTE) #define SND_PCM_TYPE_LBSERVER ((snd_pcm_type_t) SND_PCM_TYPE_LBSERVER) typedef struct _snd_pcm_channel_area { void *addr; /* base address of channel samples */ unsigned int first; /* offset to first sample in bits */ unsigned int step; /* samples distance in bits */ } snd_pcm_channel_area_t; #ifdef __cplusplus extern "C" { #endif int snd_pcm_open(snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode); snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm); int snd_pcm_close(snd_pcm_t *pcm); int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm); int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space); int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock); int snd_pcm_async(snd_pcm_t *pcm, int sig, pid_t pid); int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info); int snd_pcm_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params); int snd_pcm_hw_free(snd_pcm_t *pcm); int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params); int snd_pcm_prepare(snd_pcm_t *pcm); int snd_pcm_reset(snd_pcm_t *pcm); int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status); int snd_pcm_start(snd_pcm_t *pcm); int snd_pcm_drop(snd_pcm_t *pcm); int snd_pcm_drain(snd_pcm_t *pcm); int snd_pcm_pause(snd_pcm_t *pcm, int enable); snd_pcm_state_t snd_pcm_state(snd_pcm_t *pcm); int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp); snd_pcm_sframes_t snd_pcm_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames); snd_pcm_sframes_t snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, snd_output_t *out); int snd_pcm_dump_sw_setup(snd_pcm_t *pcm, snd_output_t *out); int snd_pcm_dump_setup(snd_pcm_t *pcm, snd_output_t *out); int snd_pcm_dump(snd_pcm_t *pcm, snd_output_t *out); int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2); int snd_pcm_unlink(snd_pcm_t *pcm); int snd_pcm_wait(snd_pcm_t *pcm, int timeout); snd_pcm_sframes_t snd_pcm_avail_update(snd_pcm_t *pcm); const char *snd_pcm_name(snd_pcm_t *pcm); snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm); /* HW params */ int snd_pcm_hw_params_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params); int snd_pcm_hw_params_try_explain_failure(snd_pcm_t *pcm, snd_pcm_hw_params_t *fail, snd_pcm_hw_params_t *success, unsigned int depth, snd_output_t *out); int snd_pcm_hw_params_get_rate_numden(const snd_pcm_hw_params_t *params, unsigned int *rate_num, unsigned int *rate_den); int snd_pcm_hw_params_get_sbits(const snd_pcm_hw_params_t *params); int snd_pcm_hw_params_get_fifo_size(const snd_pcm_hw_params_t *params); int snd_pcm_hw_params_dump(snd_pcm_hw_params_t *params, snd_output_t *out); typedef struct _snd_pcm_hw_strategy snd_pcm_hw_strategy_t; /* choices need to be sorted on ascending badness */ typedef struct _snd_pcm_hw_strategy_simple_choices_list { unsigned int value; unsigned int badness; } snd_pcm_hw_strategy_simple_choices_list_t; int snd_pcm_hw_params_strategy(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, const snd_pcm_hw_strategy_t *strategy, unsigned int badness_min, unsigned int badness_max); void snd_pcm_hw_strategy_free(snd_pcm_hw_strategy_t *strategy); int snd_pcm_hw_strategy_simple(snd_pcm_hw_strategy_t **strategyp, unsigned int badness_min, unsigned int badness_max); int snd_pcm_sw_params_current(snd_pcm_t *pcm, snd_pcm_sw_params_t *params); int snd_pcm_sw_params_dump(snd_pcm_sw_params_t *params, snd_output_t *out); int snd_pcm_status_dump(snd_pcm_status_t *status, snd_output_t *out); /* mmap */ const snd_pcm_channel_area_t *snd_pcm_mmap_areas(snd_pcm_t *pcm); const snd_pcm_channel_area_t *snd_pcm_mmap_running_areas(snd_pcm_t *pcm); const snd_pcm_channel_area_t *snd_pcm_mmap_stopped_areas(snd_pcm_t *pcm); snd_pcm_sframes_t snd_pcm_mmap_forward(snd_pcm_t *pcm, snd_pcm_uframes_t size); snd_pcm_uframes_t snd_pcm_mmap_offset(snd_pcm_t *pcm); snd_pcm_uframes_t snd_pcm_mmap_xfer(snd_pcm_t *pcm, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); snd_pcm_sframes_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); const char *snd_pcm_stream_name(snd_pcm_stream_t stream); const char *snd_pcm_access_name(snd_pcm_access_t access); const char *snd_pcm_format_name(snd_pcm_format_t format); const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat); const char *snd_pcm_format_description(snd_pcm_format_t format); snd_pcm_format_t snd_pcm_format_value(const char* name); const char *snd_pcm_start_mode_name(snd_pcm_start_t mode); const char *snd_pcm_xrun_mode_name(snd_pcm_xrun_t mode); const char *snd_pcm_tstamp_mode_name(snd_pcm_tstamp_t mode); const char *snd_pcm_state_name(snd_pcm_state_t state); int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset, unsigned int samples, snd_pcm_format_t format); int snd_pcm_areas_silence(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset, unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format); int snd_pcm_area_copy(const snd_pcm_channel_area_t *dst_channel, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_channel, snd_pcm_uframes_t src_offset, unsigned int samples, snd_pcm_format_t format); int snd_pcm_areas_copy(const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset, unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format); snd_pcm_sframes_t snd_pcm_bytes_to_frames(snd_pcm_t *pcm, ssize_t bytes); ssize_t snd_pcm_frames_to_bytes(snd_pcm_t *pcm, snd_pcm_sframes_t frames); int snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes); ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, int samples); /* misc */ int snd_pcm_format_signed(snd_pcm_format_t format); int snd_pcm_format_unsigned(snd_pcm_format_t format); int snd_pcm_format_linear(snd_pcm_format_t format); int snd_pcm_format_little_endian(snd_pcm_format_t format); int snd_pcm_format_big_endian(snd_pcm_format_t format); int snd_pcm_format_cpu_endian(snd_pcm_format_t format); int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); u_int8_t snd_pcm_format_silence(snd_pcm_format_t format); u_int16_t snd_pcm_format_silence_16(snd_pcm_format_t format); u_int32_t snd_pcm_format_silence_32(snd_pcm_format_t format); u_int64_t snd_pcm_format_silence_64(snd_pcm_format_t format); int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int samples); #ifdef __cplusplus } #endif