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Matheus
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
#ifndef _AUDIO_H
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#define _AUDIO_H
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#include <ringbuffer.h>
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#include <mutex.h>
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#include <stdbool.h>
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#include <kernel/poll.h>
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typedef struct audio_stream audio_stream_t;
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typedef struct {
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int (*acquire_stream)(void *private, bool nonblocking, audio_stream_t **stream);
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void (*release_stream)(void *private, audio_stream_t *stream);
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} audio_device_ops_t;
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#define AUDIO_STREAM_INFO_FRAGMENT_SIZE 1
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#define AUDIO_STREAM_INFO_SPEED 2
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#define AUDIO_STREAM_INFO_CHANNELS 3
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#define AUDIO_STREAM_INFO_FORMAT 4
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#define AUDIO_STREAM_INFO_FIFO_FRAMES 5
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#define AUDIO_STREAM_INFO_PLAYED_FRAMES 6
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#define AUDIO_STREAM_INFO_SUPPORTED_FORMATS 7
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#define AUDIO_FORMAT_QUERY 0x00000000
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#define AUDIO_FORMAT_MU_LAW 0x00000001
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#define AUDIO_FORMAT_A_LAW 0x00000002
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#define AUDIO_FORMAT_IMA_ADPCM 0x00000004
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#define AUDIO_FORMAT_U8 0x00000008
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#define AUDIO_FORMAT_S16_LE 0x00000010
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#define AUDIO_FORMAT_S16_BE 0x00000020
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#define AUDIO_FORMAT_S8 0x00000040
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#define AUDIO_FORMAT_U16_LE 0x00000080
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#define AUDIO_FORMAT_U16_BE 0x00000100
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#define AUDIO_FORMAT_MPEG 0x00000200
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#define AUDIO_FORMAT_AC3 0x00000400
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#define AUDIO_FORMAT_VORBIS 0x00000800
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#define AUDIO_FORMAT_S32_LE 0x00001000
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#define AUDIO_FORMAT_S32_BE 0x00002000
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#define AUDIO_FORMAT_FLOAT 0x00004000
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#define AUDIO_FORMAT_S24_LE 0x00008000
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#define AUDIO_FORMAT_S24_BE 0x00010000
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#define AUDIO_FORMAT_SPDIF_RAW 0x00020000
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#define AUDIO_FORMAT_S24_PACKED 0x00040000
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#define AUDIO_TRIGGER_INPUT 1
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#define AUDIO_TRIGGER_OUTPUT 2
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typedef struct {
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void (*start)(audio_stream_t *);
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void (*stop)(audio_stream_t *);
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void (*wait_for_playback)(audio_stream_t *);
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void (*reset)(audio_stream_t *);
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int (*set_format)(audio_stream_t *, int format, int *selected);
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int (*set_speed)(audio_stream_t *, int speed, int *selected);
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int (*set_channels)(audio_stream_t *, int channels, int *selected);
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void (*get_info)(audio_stream_t *, int what, void *buf);
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} audio_stream_ops_t;
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typedef struct audio_stream {
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mutex_t mutex;
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ringbuffer_t ringbuffer;
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pollheader_t pollheader;
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audio_stream_ops_t *ops;
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bool playing;
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int trigger;
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size_t underruns;
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size_t bytes_submitted;
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size_t bytes_written;
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size_t bytes_played;
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} audio_stream_t;
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bool audio_take_stream_data(audio_stream_t *stream, void *buffer, size_t size);
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int audio_initialize_stream(audio_stream_t *stream, audio_stream_ops_t *stream_ops);
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int audio_register_device(audio_device_ops_t *device_ops, void *private);
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#endif
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