152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/* audio_driver.h */
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/* Jon Watte 19971223 */
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/* Interface to drivers found in /dev/audio */
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/* Devices found in /dev/audio/old follow a different API! */
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/*
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Copyright 1999, Be Incorporated. All Rights Reserved.
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This file may be used under the terms of the Be Sample Code License.
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*/
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#if !defined(_AUDIO_DRIVER_H)
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#define _AUDIO_DRIVER_H
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#if !defined(_SUPPORT_DEFS_H)
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#include <SupportDefs.h>
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#endif /* _SUPPORT_DEFS_H */
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#if !defined(_DRIVERS_H)
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#include <Drivers.h>
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#endif /* _DRIVERS_H */
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enum {
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/* arg = ptr to struct audio_format */
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B_AUDIO_GET_AUDIO_FORMAT = B_AUDIO_DRIVER_BASE,
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B_AUDIO_SET_AUDIO_FORMAT,
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/* arg = ptr to float[4] */
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B_AUDIO_GET_PREFERRED_SAMPLE_RATES,
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/* arg = ptr to struct audio_routing_cmd */
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B_ROUTING_GET_VALUES,
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B_ROUTING_SET_VALUES,
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/* arg = ptr to struct audio_routing_cmd */
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B_MIXER_GET_VALUES,
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B_MIXER_SET_VALUES,
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/* arg = ptr to struct audio_timing */
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B_AUDIO_GET_TIMING /* used to be SV_SECRET_HANDSHAKE (10100) */
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};
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/* this is the definition of what the audio driver can do for you */
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typedef struct audio_format {
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float sample_rate; /* ~4000 - ~48000, maybe more */
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int32 channels; /* 1 or 2 */
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int32 format; /* 0x11 (uchar), 0x2 (short) or 0x24 (float) */
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int32 big_endian; /* 0 for little endian, 1 for big endian */
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size_t buf_header; /* typically 0 or 16 */
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size_t play_buf_size; /* size of playback buffer (latency) */
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size_t rec_buf_size; /* size of record buffer (latency) */
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} audio_format;
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/* when buffer header is in effect, this is what gets read before data */
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typedef struct audio_buf_header {
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bigtime_t capture_time;
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uint32 capture_size;
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float sample_rate;
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} audio_buf_header;
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/* the mux devices use these records */
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typedef struct audio_routing {
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int32 selector; /* for GET, these need to be filled in! */
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int32 value;
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} audio_routing;
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/* this is the argument for ioctl() */
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typedef struct audio_routing_cmd {
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int32 count;
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audio_routing* data;
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} audio_routing_cmd;
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typedef struct {
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bigtime_t wr_time;
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bigtime_t rd_time;
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uint32 wr_skipped;
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uint32 rd_skipped;
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uint64 wr_total;
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uint64 rd_total;
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uint32 _reserved_[6];
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} audio_timing;
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enum { /* selectors for routing */
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B_AUDIO_INPUT_SELECT,
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B_AUDIO_MIC_BOOST,
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B_AUDIO_MIDI_OUTPUT_TO_SYNTH,
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B_AUDIO_MIDI_INPUT_TO_SYNTH,
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B_AUDIO_MIDI_OUTPUT_TO_PORT,
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B_AUDIO_PCM_OUT_POST_3D,
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B_AUDIO_STEREO_ENHANCEMENT,
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B_AUDIO_3D_STEREO_ENHANCEMENT,
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B_AUDIO_BASS_BOOST,
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B_AUDIO_LOCAL_LOOPBACK,
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B_AUDIO_REMOTE_LOOPBACK,
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B_AUDIO_MONO_OUTPUT_FROM_MIC,
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B_AUDIO_ALTERNATE_MIC,
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B_AUDIO_ADC_DAC_LOOPBACK
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};
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enum { /* input MUX source values */
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B_AUDIO_INPUT_DAC = 1, /* (not in AC97) */
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B_AUDIO_INPUT_LINE_IN,
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B_AUDIO_INPUT_CD,
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B_AUDIO_INPUT_VIDEO,
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B_AUDIO_INPUT_AUX1, /* synth */
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B_AUDIO_INPUT_AUX2, /* (not in AC97) */
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B_AUDIO_INPUT_PHONE,
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B_AUDIO_INPUT_MIC,
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B_AUDIO_INPUT_MIX_OUT, /* sum of all outputs */
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B_AUDIO_INPUT_MONO_OUT
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};
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/* the mixer devices use these records */
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typedef struct audio_level {
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int32 selector; /* for GET, this still needs to be filled in! */
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uint32 flags;
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float value; /* in dB */
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} audio_level;
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/* this is the arg to ioctl() */
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typedef struct audio_level_cmd {
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int32 count;
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audio_level* data;
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} audio_level_cmd;
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/* bitmask for the flags */
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#define B_AUDIO_LEVEL_MUTED 1
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enum { /* selectors for levels */
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B_AUDIO_MIX_ADC_LEFT,
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B_AUDIO_MIX_ADC_RIGHT,
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B_AUDIO_MIX_DAC_LEFT,
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B_AUDIO_MIX_DAC_RIGHT,
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B_AUDIO_MIX_LINE_IN_LEFT,
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B_AUDIO_MIX_LINE_IN_RIGHT,
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B_AUDIO_MIX_CD_LEFT,
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B_AUDIO_MIX_CD_RIGHT,
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B_AUDIO_MIX_VIDEO_LEFT,
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B_AUDIO_MIX_VIDEO_RIGHT,
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B_AUDIO_MIX_SYNTH_LEFT,
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B_AUDIO_MIX_SYNTH_RIGHT,
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B_AUDIO_MIX_AUX_LEFT, /* (not in AC97) */
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B_AUDIO_MIX_AUX_RIGHT, /* (not in AC97) */
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B_AUDIO_MIX_PC_BEEP,
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B_AUDIO_MIX_PHONE,
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B_AUDIO_MIX_MIC,
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B_AUDIO_MIX_LINE_OUT_LEFT,
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B_AUDIO_MIX_LINE_OUT_RIGHT,
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B_AUDIO_MIX_HEADPHONE_OUT_LEFT,
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B_AUDIO_MIX_HEADPHONE_OUT_RIGHT,
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B_AUDIO_MIX_MONO_OUT,
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B_AUDIO_MIX_LOOPBACK_LEVEL /* (not in AC97) */
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};
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#endif /* _AUDIO_DRIVER_H */
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