mirror of
https://github.com/alsa-project/alsa-lib.git
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168 lines
6.6 KiB
C
168 lines
6.6 KiB
C
/****************************************************************************
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* *
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* pcm.h *
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* Digital Audio Interface *
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* *
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****************************************************************************/
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#define SND_PCM_NONBLOCK 0x0001
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#define SND_PCM_ASYNC 0x0002
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _snd_pcm snd_pcm_t;
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typedef enum _snd_pcm_type {
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SND_PCM_TYPE_HW,
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SND_PCM_TYPE_MULTI,
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SND_PCM_TYPE_FILE,
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SND_PCM_TYPE_NULL,
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SND_PCM_TYPE_SHM,
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SND_PCM_TYPE_INET,
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SND_PCM_TYPE_LINEAR,
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SND_PCM_TYPE_ALAW,
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SND_PCM_TYPE_MULAW,
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SND_PCM_TYPE_ADPCM,
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SND_PCM_TYPE_RATE,
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SND_PCM_TYPE_ROUTE,
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SND_PCM_TYPE_PLUG,
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SND_PCM_TYPE_SHARE,
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SND_PCM_TYPE_MIX,
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SND_PCM_TYPE_DROUTE,
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SND_PCM_TYPE_LBSERVER,
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} snd_pcm_type_t;
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enum {
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SND_PCM_RULE_PAR_MASK = 0x00ff,
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SND_PCM_RULE_REL_LT = 0x100,
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SND_PCM_RULE_REL_GT = 0x200,
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SND_PCM_RULE_REL_EQ = 0x300,
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SND_PCM_RULE_REL_LE = 0x400,
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SND_PCM_RULE_REL_GE = 0x500,
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SND_PCM_RULE_REL_NEAR = 0x600,
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SND_PCM_RULE_REL_BITS = 0x700,
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SND_PCM_RULE_REL_MASK = 0xff00
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};
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typedef struct _snd_pcm_channel_area {
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void *addr; /* base address of channel samples */
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unsigned int first; /* offset to first sample in bits */
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unsigned int step; /* samples distance in bits */
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} snd_pcm_channel_area_t;
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int snd_pcm_open(snd_pcm_t **pcm, char *name,
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int stream, int mode);
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/* Obsolete functions */
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#define snd_pcm_write snd_pcm_writei
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#define snd_pcm_read snd_pcm_readi
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ssize_t snd_pcm_writev(snd_pcm_t *pcm, const struct iovec *vector, int count);
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ssize_t snd_pcm_readv(snd_pcm_t *pcm, const struct iovec *vector, int count);
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snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm);
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int snd_pcm_close(snd_pcm_t *pcm);
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int snd_pcm_poll_descriptor(snd_pcm_t *pcm);
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int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock);
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int snd_pcm_async(snd_pcm_t *pcm, int sig, pid_t pid);
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int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info);
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int snd_pcm_hw_info(snd_pcm_t *pcm, snd_pcm_hw_info_t *info);
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int snd_pcm_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
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int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
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int snd_pcm_dig_info(snd_pcm_t *pcm, snd_pcm_dig_info_t *info);
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int snd_pcm_dig_params(snd_pcm_t *pcm, snd_pcm_dig_params_t *params);
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int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status);
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int snd_pcm_prepare(snd_pcm_t *pcm);
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int snd_pcm_reset(snd_pcm_t *pcm);
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int snd_pcm_start(snd_pcm_t *pcm);
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int snd_pcm_drop(snd_pcm_t *pcm);
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int snd_pcm_drain(snd_pcm_t *pcm);
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int snd_pcm_pause(snd_pcm_t *pcm, int enable);
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int snd_pcm_state(snd_pcm_t *pcm);
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int snd_pcm_delay(snd_pcm_t *pcm, ssize_t *delayp);
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ssize_t snd_pcm_rewind(snd_pcm_t *pcm, size_t frames);
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ssize_t snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, size_t size);
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ssize_t snd_pcm_readi(snd_pcm_t *pcm, void *buffer, size_t size);
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ssize_t snd_pcm_writen(snd_pcm_t *pcm, void **bufs, size_t size);
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ssize_t snd_pcm_readn(snd_pcm_t *pcm, void **bufs, size_t size);
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int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, FILE *fp);
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int snd_pcm_dump_sw_setup(snd_pcm_t *pcm, FILE *fp);
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int snd_pcm_dump_setup(snd_pcm_t *pcm, FILE *fp);
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int snd_pcm_dump_hw_params_fail(snd_pcm_hw_params_t *params, FILE *fp);
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int snd_pcm_dump_sw_params_fail(snd_pcm_sw_params_t *params, FILE *fp);
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int snd_pcm_dump(snd_pcm_t *pcm, FILE *fp);
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int snd_pcm_dump_status(snd_pcm_status_t *status, FILE *fp);
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int snd_pcm_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2);
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int snd_pcm_unlink(snd_pcm_t *pcm);
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int snd_pcm_wait(snd_pcm_t *pcm, int timeout);
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ssize_t snd_pcm_avail_update(snd_pcm_t *pcm);
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int snd_pcm_set_avail_min(snd_pcm_t *pcm, size_t size);
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int snd_pcm_hw_params_rules(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
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unsigned int count, int *rules);
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int snd_pcm_hw_params_rulesv(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, ...);
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int snd_pcm_hw_info_rules(snd_pcm_t *pcm,
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snd_pcm_hw_info_t *info,
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snd_pcm_hw_params_t *params,
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unsigned int count, int *rules);
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int snd_pcm_hw_info_rulesv(snd_pcm_t *pcm,
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snd_pcm_hw_info_t *info,
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snd_pcm_hw_params_t *params, ...);
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/* mmap */
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snd_pcm_channel_area_t *snd_pcm_mmap_areas(snd_pcm_t *pcm);
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snd_pcm_channel_area_t *snd_pcm_mmap_running_areas(snd_pcm_t *pcm);
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snd_pcm_channel_area_t *snd_pcm_mmap_stopped_areas(snd_pcm_t *pcm);
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ssize_t snd_pcm_mmap_forward(snd_pcm_t *pcm, size_t size);
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size_t snd_pcm_mmap_offset(snd_pcm_t *pcm);
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size_t snd_pcm_mmap_xfer(snd_pcm_t *pcm, size_t size);
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ssize_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, size_t size);
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ssize_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, size_t size);
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ssize_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, size_t size);
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ssize_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, size_t size);
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const char *snd_pcm_format_name(int format);
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const char *snd_pcm_format_description(int format);
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int snd_pcm_format_value(const char* name);
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int snd_pcm_area_silence(snd_pcm_channel_area_t *dst_channel, size_t dst_offset,
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size_t samples, int format);
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int snd_pcm_areas_silence(snd_pcm_channel_area_t *dst_channels, size_t dst_offset,
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size_t vcount, size_t frames, int format);
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int snd_pcm_area_copy(snd_pcm_channel_area_t *src_channel, size_t src_offset,
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snd_pcm_channel_area_t *dst_channel, size_t dst_offset,
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size_t samples, int format);
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int snd_pcm_areas_copy(snd_pcm_channel_area_t *src_channels, size_t src_offset,
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snd_pcm_channel_area_t *dst_channels, size_t dst_offset,
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size_t channels, size_t frames, int format);
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ssize_t snd_pcm_bytes_to_frames(snd_pcm_t *pcm, ssize_t bytes);
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ssize_t snd_pcm_frames_to_bytes(snd_pcm_t *pcm, ssize_t frames);
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ssize_t snd_pcm_bytes_to_samples(snd_pcm_t *pcm, ssize_t bytes);
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ssize_t snd_pcm_samples_to_bytes(snd_pcm_t *pcm, ssize_t samples);
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/* misc */
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int snd_pcm_format_signed(int format);
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int snd_pcm_format_unsigned(int format);
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int snd_pcm_format_linear(int format);
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int snd_pcm_format_little_endian(int format);
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int snd_pcm_format_big_endian(int format);
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int snd_pcm_format_width(int format); /* in bits */
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int snd_pcm_format_physical_width(int format); /* in bits */
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int snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
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ssize_t snd_pcm_format_size(int format, size_t samples);
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u_int8_t snd_pcm_format_silence(int format);
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u_int16_t snd_pcm_format_silence_16(int format);
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u_int32_t snd_pcm_format_silence_32(int format);
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u_int64_t snd_pcm_format_silence_64(int format);
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ssize_t snd_pcm_format_set_silence(int format, void *buf, size_t count);
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#ifdef __cplusplus
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}
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#endif
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