diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/tinyalsa/asoundlib.h | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h index 3d20b94..a85e810 100644 --- a/include/tinyalsa/asoundlib.h +++ b/include/tinyalsa/asoundlib.h @@ -55,15 +55,12 @@ struct pcm; * second call to pcm_write will attempt to * restart the stream. */ +#define PCM_MONOTONIC 0x00000008 /* see pcm_get_htimestamp */ /* PCM runtime states */ -#define PCM_STATE_OPEN 0 -#define PCM_STATE_SETUP 1 -#define PCM_STATE_PREPARED 2 -#define PCM_STATE_RUNNING 3 +#define PCM_STATE_RUNNING 3 #define PCM_STATE_XRUN 4 #define PCM_STATE_DRAINING 5 -#define PCM_STATE_PAUSED 6 #define PCM_STATE_SUSPENDED 7 #define PCM_STATE_DISCONNECTED 8 @@ -77,6 +74,11 @@ enum pcm_format { PCM_FORMAT_MAX, }; +/* Bitmask has 256 bits (32 bytes) in asound.h */ +struct pcm_mask { + unsigned int bits[32 / sizeof(unsigned int)]; +}; + /* Configuration for a stream */ struct pcm_config { unsigned int channels; @@ -101,6 +103,11 @@ struct pcm_config { /* PCM parameters */ enum pcm_param { + /* mask parameters */ + PCM_PARAM_ACCESS, + PCM_PARAM_FORMAT, + PCM_PARAM_SUBFORMAT, + /* interval parameters */ PCM_PARAM_SAMPLE_BITS, PCM_PARAM_FRAME_BITS, PCM_PARAM_CHANNELS, @@ -138,15 +145,14 @@ int pcm_is_ready(struct pcm *pcm); struct pcm_params *pcm_params_get(unsigned int card, unsigned int device, unsigned int flags); void pcm_params_free(struct pcm_params *pcm_params); + +struct pcm_mask *pcm_params_get_mask(struct pcm_params *pcm_params, + enum pcm_param param); unsigned int pcm_params_get_min(struct pcm_params *pcm_params, enum pcm_param param); unsigned int pcm_params_get_max(struct pcm_params *pcm_params, enum pcm_param param); -/* Set and get config */ -int pcm_get_config(struct pcm *pcm, struct pcm_config *config); -int pcm_set_config(struct pcm *pcm, struct pcm_config *config); - /* Returns a human readable reason for the last error */ const char *pcm_get_error(struct pcm *pcm); @@ -162,10 +168,9 @@ unsigned int pcm_get_buffer_size(struct pcm *pcm); unsigned int pcm_frames_to_bytes(struct pcm *pcm, unsigned int frames); unsigned int pcm_bytes_to_frames(struct pcm *pcm, unsigned int bytes); -/* Returns the pcm latency in ms */ -unsigned int pcm_get_latency(struct pcm *pcm); - /* Returns available frames in pcm buffer and corresponding time stamp. + * The clock is CLOCK_MONOTONIC if flag PCM_MONOTONIC was specified in pcm_open, + * otherwise the clock is CLOCK_REALTIME. * For an input stream, frames available are frames ready for the * application to read. * For an output stream, frames available are the number of empty frames available @@ -185,10 +190,13 @@ int pcm_read(struct pcm *pcm, void *data, unsigned int count); * mmap() support. */ int pcm_mmap_write(struct pcm *pcm, const void *data, unsigned int count); +int pcm_mmap_read(struct pcm *pcm, void *data, unsigned int count); int pcm_mmap_begin(struct pcm *pcm, void **areas, unsigned int *offset, unsigned int *frames); int pcm_mmap_commit(struct pcm *pcm, unsigned int offset, unsigned int frames); +/* Prepare the PCM substream to be triggerable */ +int pcm_prepare(struct pcm *pcm); /* Start and stop a PCM channel that doesn't transfer data */ int pcm_start(struct pcm *pcm); int pcm_stop(struct pcm *pcm); |