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platform_system_core/include/system/audio.h

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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_AUDIO_CORE_H
#define ANDROID_AUDIO_CORE_H
#include <stdbool.h>
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <cutils/bitops.h>
__BEGIN_DECLS
/* The enums were moved here mostly from
* frameworks/base/include/media/AudioSystem.h
*/
/* device address used to refer to the standard remote submix */
#define AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS "0"
typedef int audio_io_handle_t;
/* Audio stream types */
typedef enum {
AUDIO_STREAM_DEFAULT = -1,
AUDIO_STREAM_VOICE_CALL = 0,
AUDIO_STREAM_SYSTEM = 1,
AUDIO_STREAM_RING = 2,
AUDIO_STREAM_MUSIC = 3,
AUDIO_STREAM_ALARM = 4,
AUDIO_STREAM_NOTIFICATION = 5,
AUDIO_STREAM_BLUETOOTH_SCO = 6,
AUDIO_STREAM_ENFORCED_AUDIBLE = 7, /* Sounds that cannot be muted by user and must be routed to speaker */
AUDIO_STREAM_DTMF = 8,
AUDIO_STREAM_TTS = 9,
AUDIO_STREAM_CNT,
AUDIO_STREAM_MAX = AUDIO_STREAM_CNT - 1,
} audio_stream_type_t;
/* Do not change these values without updating their counterparts
* in media/java/android/media/MediaRecorder.java!
*/
typedef enum {
AUDIO_SOURCE_DEFAULT = 0,
AUDIO_SOURCE_MIC = 1,
AUDIO_SOURCE_VOICE_UPLINK = 2,
AUDIO_SOURCE_VOICE_DOWNLINK = 3,
AUDIO_SOURCE_VOICE_CALL = 4,
AUDIO_SOURCE_CAMCORDER = 5,
AUDIO_SOURCE_VOICE_RECOGNITION = 6,
AUDIO_SOURCE_VOICE_COMMUNICATION = 7,
AUDIO_SOURCE_REMOTE_SUBMIX = 8, /* Source for the mix to be presented remotely. */
/* An example of remote presentation is Wifi Display */
/* where a dongle attached to a TV can be used to */
/* play the mix captured by this audio source. */
AUDIO_SOURCE_CNT,
AUDIO_SOURCE_MAX = AUDIO_SOURCE_CNT - 1,
AUDIO_SOURCE_HOTWORD = 1999, /* A low-priority, preemptible audio source for
for background software hotword detection.
Same tuning as AUDIO_SOURCE_VOICE_RECOGNITION.
Used only internally to the framework. Not exposed
at the audio HAL. */
} audio_source_t;
/* special audio session values
* (XXX: should this be living in the audio effects land?)
*/
typedef enum {
/* session for effects attached to a particular output stream
* (value must be less than 0)
*/
AUDIO_SESSION_OUTPUT_STAGE = -1,
/* session for effects applied to output mix. These effects can
* be moved by audio policy manager to another output stream
* (value must be 0)
*/
AUDIO_SESSION_OUTPUT_MIX = 0,
} audio_session_t;
/* Audio sub formats (see enum audio_format). */
/* PCM sub formats */
typedef enum {
AUDIO_FORMAT_PCM_SUB_16_BIT = 0x1, /* DO NOT CHANGE - PCM signed 16 bits */
AUDIO_FORMAT_PCM_SUB_8_BIT = 0x2, /* DO NOT CHANGE - PCM unsigned 8 bits */
AUDIO_FORMAT_PCM_SUB_32_BIT = 0x3, /* PCM signed .31 fixed point */
AUDIO_FORMAT_PCM_SUB_8_24_BIT = 0x4, /* PCM signed 7.24 fixed point */
} audio_format_pcm_sub_fmt_t;
/* MP3 sub format field definition : can use 11 LSBs in the same way as MP3
* frame header to specify bit rate, stereo mode, version...
*/
typedef enum {
AUDIO_FORMAT_MP3_SUB_NONE = 0x0,
} audio_format_mp3_sub_fmt_t;
/* AMR NB/WB sub format field definition: specify frame block interleaving,
* bandwidth efficient or octet aligned, encoding mode for recording...
*/
typedef enum {
AUDIO_FORMAT_AMR_SUB_NONE = 0x0,
} audio_format_amr_sub_fmt_t;
/* AAC sub format field definition: specify profile or bitrate for recording... */
typedef enum {
AUDIO_FORMAT_AAC_SUB_NONE = 0x0,
} audio_format_aac_sub_fmt_t;
/* VORBIS sub format field definition: specify quality for recording... */
typedef enum {
AUDIO_FORMAT_VORBIS_SUB_NONE = 0x0,
} audio_format_vorbis_sub_fmt_t;
/* Audio format consists in a main format field (upper 8 bits) and a sub format
* field (lower 24 bits).
*
* The main format indicates the main codec type. The sub format field
* indicates options and parameters for each format. The sub format is mainly
* used for record to indicate for instance the requested bitrate or profile.
* It can also be used for certain formats to give informations not present in
* the encoded audio stream (e.g. octet alignement for AMR).
*/
typedef enum {
AUDIO_FORMAT_INVALID = 0xFFFFFFFFUL,
AUDIO_FORMAT_DEFAULT = 0,
AUDIO_FORMAT_PCM = 0x00000000UL, /* DO NOT CHANGE */
AUDIO_FORMAT_MP3 = 0x01000000UL,
AUDIO_FORMAT_AMR_NB = 0x02000000UL,
AUDIO_FORMAT_AMR_WB = 0x03000000UL,
AUDIO_FORMAT_AAC = 0x04000000UL,
AUDIO_FORMAT_HE_AAC_V1 = 0x05000000UL,
AUDIO_FORMAT_HE_AAC_V2 = 0x06000000UL,
AUDIO_FORMAT_VORBIS = 0x07000000UL,
AUDIO_FORMAT_MAIN_MASK = 0xFF000000UL,
AUDIO_FORMAT_SUB_MASK = 0x00FFFFFFUL,
/* Aliases */
AUDIO_FORMAT_PCM_16_BIT = (AUDIO_FORMAT_PCM |
AUDIO_FORMAT_PCM_SUB_16_BIT),
AUDIO_FORMAT_PCM_8_BIT = (AUDIO_FORMAT_PCM |
AUDIO_FORMAT_PCM_SUB_8_BIT),
AUDIO_FORMAT_PCM_32_BIT = (AUDIO_FORMAT_PCM |
AUDIO_FORMAT_PCM_SUB_32_BIT),
AUDIO_FORMAT_PCM_8_24_BIT = (AUDIO_FORMAT_PCM |
AUDIO_FORMAT_PCM_SUB_8_24_BIT),
} audio_format_t;
enum {
/* output channels */
AUDIO_CHANNEL_OUT_FRONT_LEFT = 0x1,
AUDIO_CHANNEL_OUT_FRONT_RIGHT = 0x2,
AUDIO_CHANNEL_OUT_FRONT_CENTER = 0x4,
AUDIO_CHANNEL_OUT_LOW_FREQUENCY = 0x8,
AUDIO_CHANNEL_OUT_BACK_LEFT = 0x10,
AUDIO_CHANNEL_OUT_BACK_RIGHT = 0x20,
AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER = 0x40,
AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER = 0x80,
AUDIO_CHANNEL_OUT_BACK_CENTER = 0x100,
AUDIO_CHANNEL_OUT_SIDE_LEFT = 0x200,
AUDIO_CHANNEL_OUT_SIDE_RIGHT = 0x400,
AUDIO_CHANNEL_OUT_TOP_CENTER = 0x800,
AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT = 0x1000,
AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER = 0x2000,
AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT = 0x4000,
AUDIO_CHANNEL_OUT_TOP_BACK_LEFT = 0x8000,
AUDIO_CHANNEL_OUT_TOP_BACK_CENTER = 0x10000,
AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT = 0x20000,
AUDIO_CHANNEL_OUT_MONO = AUDIO_CHANNEL_OUT_FRONT_LEFT,
AUDIO_CHANNEL_OUT_STEREO = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
AUDIO_CHANNEL_OUT_FRONT_RIGHT),
AUDIO_CHANNEL_OUT_QUAD = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
AUDIO_CHANNEL_OUT_FRONT_RIGHT |
AUDIO_CHANNEL_OUT_BACK_LEFT |
AUDIO_CHANNEL_OUT_BACK_RIGHT),
AUDIO_CHANNEL_OUT_SURROUND = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
AUDIO_CHANNEL_OUT_FRONT_RIGHT |
AUDIO_CHANNEL_OUT_FRONT_CENTER |
AUDIO_CHANNEL_OUT_BACK_CENTER),
AUDIO_CHANNEL_OUT_5POINT1 = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
AUDIO_CHANNEL_OUT_FRONT_RIGHT |
AUDIO_CHANNEL_OUT_FRONT_CENTER |
AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
AUDIO_CHANNEL_OUT_BACK_LEFT |
AUDIO_CHANNEL_OUT_BACK_RIGHT),
// matches the correct AudioFormat.CHANNEL_OUT_7POINT1_SURROUND definition for 7.1
AUDIO_CHANNEL_OUT_7POINT1 = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
AUDIO_CHANNEL_OUT_FRONT_RIGHT |
AUDIO_CHANNEL_OUT_FRONT_CENTER |
AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
AUDIO_CHANNEL_OUT_BACK_LEFT |
AUDIO_CHANNEL_OUT_BACK_RIGHT |
AUDIO_CHANNEL_OUT_SIDE_LEFT |
AUDIO_CHANNEL_OUT_SIDE_RIGHT),
AUDIO_CHANNEL_OUT_ALL = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
AUDIO_CHANNEL_OUT_FRONT_RIGHT |
AUDIO_CHANNEL_OUT_FRONT_CENTER |
AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
AUDIO_CHANNEL_OUT_BACK_LEFT |
AUDIO_CHANNEL_OUT_BACK_RIGHT |
AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER |
AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER |
AUDIO_CHANNEL_OUT_BACK_CENTER|
AUDIO_CHANNEL_OUT_SIDE_LEFT|
AUDIO_CHANNEL_OUT_SIDE_RIGHT|
AUDIO_CHANNEL_OUT_TOP_CENTER|
AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT|
AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER|
AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT|
AUDIO_CHANNEL_OUT_TOP_BACK_LEFT|
AUDIO_CHANNEL_OUT_TOP_BACK_CENTER|
AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT),
/* input channels */
AUDIO_CHANNEL_IN_LEFT = 0x4,
AUDIO_CHANNEL_IN_RIGHT = 0x8,
AUDIO_CHANNEL_IN_FRONT = 0x10,
AUDIO_CHANNEL_IN_BACK = 0x20,
AUDIO_CHANNEL_IN_LEFT_PROCESSED = 0x40,
AUDIO_CHANNEL_IN_RIGHT_PROCESSED = 0x80,
AUDIO_CHANNEL_IN_FRONT_PROCESSED = 0x100,
AUDIO_CHANNEL_IN_BACK_PROCESSED = 0x200,
AUDIO_CHANNEL_IN_PRESSURE = 0x400,
AUDIO_CHANNEL_IN_X_AXIS = 0x800,
AUDIO_CHANNEL_IN_Y_AXIS = 0x1000,
AUDIO_CHANNEL_IN_Z_AXIS = 0x2000,
AUDIO_CHANNEL_IN_VOICE_UPLINK = 0x4000,
AUDIO_CHANNEL_IN_VOICE_DNLINK = 0x8000,
AUDIO_CHANNEL_IN_MONO = AUDIO_CHANNEL_IN_FRONT,
AUDIO_CHANNEL_IN_STEREO = (AUDIO_CHANNEL_IN_LEFT | AUDIO_CHANNEL_IN_RIGHT),
AUDIO_CHANNEL_IN_FRONT_BACK = (AUDIO_CHANNEL_IN_FRONT | AUDIO_CHANNEL_IN_BACK),
AUDIO_CHANNEL_IN_ALL = (AUDIO_CHANNEL_IN_LEFT |
AUDIO_CHANNEL_IN_RIGHT |
AUDIO_CHANNEL_IN_FRONT |
AUDIO_CHANNEL_IN_BACK|
AUDIO_CHANNEL_IN_LEFT_PROCESSED |
AUDIO_CHANNEL_IN_RIGHT_PROCESSED |
AUDIO_CHANNEL_IN_FRONT_PROCESSED |
AUDIO_CHANNEL_IN_BACK_PROCESSED|
AUDIO_CHANNEL_IN_PRESSURE |
AUDIO_CHANNEL_IN_X_AXIS |
AUDIO_CHANNEL_IN_Y_AXIS |
AUDIO_CHANNEL_IN_Z_AXIS |
AUDIO_CHANNEL_IN_VOICE_UPLINK |
AUDIO_CHANNEL_IN_VOICE_DNLINK),
};
typedef uint32_t audio_channel_mask_t;
typedef enum {
AUDIO_MODE_INVALID = -2,
AUDIO_MODE_CURRENT = -1,
AUDIO_MODE_NORMAL = 0,
AUDIO_MODE_RINGTONE = 1,
AUDIO_MODE_IN_CALL = 2,
AUDIO_MODE_IN_COMMUNICATION = 3,
AUDIO_MODE_CNT,
AUDIO_MODE_MAX = AUDIO_MODE_CNT - 1,
} audio_mode_t;
typedef enum {
AUDIO_IN_ACOUSTICS_AGC_ENABLE = 0x0001,
AUDIO_IN_ACOUSTICS_AGC_DISABLE = 0,
AUDIO_IN_ACOUSTICS_NS_ENABLE = 0x0002,
AUDIO_IN_ACOUSTICS_NS_DISABLE = 0,
AUDIO_IN_ACOUSTICS_TX_IIR_ENABLE = 0x0004,
AUDIO_IN_ACOUSTICS_TX_DISABLE = 0,
} audio_in_acoustics_t;
enum {
AUDIO_DEVICE_NONE = 0x0,
/* reserved bits */
AUDIO_DEVICE_BIT_IN = 0x80000000,
AUDIO_DEVICE_BIT_DEFAULT = 0x40000000,
/* output devices */
AUDIO_DEVICE_OUT_EARPIECE = 0x1,
AUDIO_DEVICE_OUT_SPEAKER = 0x2,
AUDIO_DEVICE_OUT_WIRED_HEADSET = 0x4,
AUDIO_DEVICE_OUT_WIRED_HEADPHONE = 0x8,
AUDIO_DEVICE_OUT_BLUETOOTH_SCO = 0x10,
AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET = 0x20,
AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT = 0x40,
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP = 0x80,
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES = 0x100,
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER = 0x200,
AUDIO_DEVICE_OUT_AUX_DIGITAL = 0x400,
AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET = 0x800,
AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET = 0x1000,
AUDIO_DEVICE_OUT_USB_ACCESSORY = 0x2000,
AUDIO_DEVICE_OUT_USB_DEVICE = 0x4000,
AUDIO_DEVICE_OUT_REMOTE_SUBMIX = 0x8000,
AUDIO_DEVICE_OUT_DEFAULT = AUDIO_DEVICE_BIT_DEFAULT,
AUDIO_DEVICE_OUT_ALL = (AUDIO_DEVICE_OUT_EARPIECE |
AUDIO_DEVICE_OUT_SPEAKER |
AUDIO_DEVICE_OUT_WIRED_HEADSET |
AUDIO_DEVICE_OUT_WIRED_HEADPHONE |
AUDIO_DEVICE_OUT_BLUETOOTH_SCO |
AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET |
AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT |
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER |
AUDIO_DEVICE_OUT_AUX_DIGITAL |
AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET |
AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET |
AUDIO_DEVICE_OUT_USB_ACCESSORY |
AUDIO_DEVICE_OUT_USB_DEVICE |
AUDIO_DEVICE_OUT_REMOTE_SUBMIX |
AUDIO_DEVICE_OUT_DEFAULT),
AUDIO_DEVICE_OUT_ALL_A2DP = (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
AUDIO_DEVICE_OUT_ALL_SCO = (AUDIO_DEVICE_OUT_BLUETOOTH_SCO |
AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET |
AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
AUDIO_DEVICE_OUT_ALL_USB = (AUDIO_DEVICE_OUT_USB_ACCESSORY |
AUDIO_DEVICE_OUT_USB_DEVICE),
/* input devices */
AUDIO_DEVICE_IN_COMMUNICATION = AUDIO_DEVICE_BIT_IN | 0x1,
AUDIO_DEVICE_IN_AMBIENT = AUDIO_DEVICE_BIT_IN | 0x2,
AUDIO_DEVICE_IN_BUILTIN_MIC = AUDIO_DEVICE_BIT_IN | 0x4,
AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET = AUDIO_DEVICE_BIT_IN | 0x8,
AUDIO_DEVICE_IN_WIRED_HEADSET = AUDIO_DEVICE_BIT_IN | 0x10,
AUDIO_DEVICE_IN_AUX_DIGITAL = AUDIO_DEVICE_BIT_IN | 0x20,
AUDIO_DEVICE_IN_VOICE_CALL = AUDIO_DEVICE_BIT_IN | 0x40,
AUDIO_DEVICE_IN_BACK_MIC = AUDIO_DEVICE_BIT_IN | 0x80,
AUDIO_DEVICE_IN_REMOTE_SUBMIX = AUDIO_DEVICE_BIT_IN | 0x100,
AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET = AUDIO_DEVICE_BIT_IN | 0x200,
AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET = AUDIO_DEVICE_BIT_IN | 0x400,
AUDIO_DEVICE_IN_USB_ACCESSORY = AUDIO_DEVICE_BIT_IN | 0x800,
AUDIO_DEVICE_IN_USB_DEVICE = AUDIO_DEVICE_BIT_IN | 0x1000,
AUDIO_DEVICE_IN_DEFAULT = AUDIO_DEVICE_BIT_IN | AUDIO_DEVICE_BIT_DEFAULT,
AUDIO_DEVICE_IN_ALL = (AUDIO_DEVICE_IN_COMMUNICATION |
AUDIO_DEVICE_IN_AMBIENT |
AUDIO_DEVICE_IN_BUILTIN_MIC |
AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET |
AUDIO_DEVICE_IN_WIRED_HEADSET |
AUDIO_DEVICE_IN_AUX_DIGITAL |
AUDIO_DEVICE_IN_VOICE_CALL |
AUDIO_DEVICE_IN_BACK_MIC |
AUDIO_DEVICE_IN_REMOTE_SUBMIX |
AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET |
AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET |
AUDIO_DEVICE_IN_USB_ACCESSORY |
AUDIO_DEVICE_IN_USB_DEVICE |
AUDIO_DEVICE_IN_DEFAULT),
AUDIO_DEVICE_IN_ALL_SCO = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET,
};
typedef uint32_t audio_devices_t;
/* the audio output flags serve two purposes:
* - when an AudioTrack is created they indicate a "wish" to be connected to an
* output stream with attributes corresponding to the specified flags
* - when present in an output profile descriptor listed for a particular audio
* hardware module, they indicate that an output stream can be opened that
* supports the attributes indicated by the flags.
* the audio policy manager will try to match the flags in the request
* (when getOuput() is called) to an available output stream.
*/
typedef enum {
AUDIO_OUTPUT_FLAG_NONE = 0x0, // no attributes
AUDIO_OUTPUT_FLAG_DIRECT = 0x1, // this output directly connects a track
// to one output stream: no software mixer
AUDIO_OUTPUT_FLAG_PRIMARY = 0x2, // this output is the primary output of
// the device. It is unique and must be
// present. It is opened by default and
// receives routing, audio mode and volume
// controls related to voice calls.
AUDIO_OUTPUT_FLAG_FAST = 0x4, // output supports "fast tracks",
// defined elsewhere
AUDIO_OUTPUT_FLAG_DEEP_BUFFER = 0x8, // use deep audio buffers
AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD = 0x10, // offload playback of compressed
// streams to hardware codec
AUDIO_OUTPUT_FLAG_NON_BLOCKING = 0x20 // use non-blocking write
} audio_output_flags_t;
/* The audio input flags are analogous to audio output flags.
* Currently they are used only when an AudioRecord is created,
* to indicate a preference to be connected to an input stream with
* attributes corresponding to the specified flags.
*/
typedef enum {
AUDIO_INPUT_FLAG_NONE = 0x0, // no attributes
AUDIO_INPUT_FLAG_FAST = 0x1, // prefer an input that supports "fast tracks"
} audio_input_flags_t;
/* Additional information about compressed streams offloaded to
* hardware playback
* The version and size fields must be initialized by the caller by using
* one of the constants defined here.
*/
typedef struct {
uint16_t version; // version of the info structure
uint16_t size; // total size of the structure including version and size
uint32_t sample_rate; // sample rate in Hz
audio_channel_mask_t channel_mask; // channel mask
audio_format_t format; // audio format
audio_stream_type_t stream_type; // stream type
uint32_t bit_rate; // bit rate in bits per second
int64_t duration_us; // duration in microseconds, -1 if unknown
bool has_video; // true if stream is tied to a video stream
bool is_streaming; // true if streaming, false if local playback
} audio_offload_info_t;
#define AUDIO_MAKE_OFFLOAD_INFO_VERSION(maj,min) \
((((maj) & 0xff) << 8) | ((min) & 0xff))
#define AUDIO_OFFLOAD_INFO_VERSION_0_1 AUDIO_MAKE_OFFLOAD_INFO_VERSION(0, 1)
#define AUDIO_OFFLOAD_INFO_VERSION_CURRENT AUDIO_OFFLOAD_INFO_VERSION_0_1
static const audio_offload_info_t AUDIO_INFO_INITIALIZER = {
version: AUDIO_OFFLOAD_INFO_VERSION_CURRENT,
size: sizeof(audio_offload_info_t),
};
static inline bool audio_is_output_device(audio_devices_t device)
{
if (((device & AUDIO_DEVICE_BIT_IN) == 0) &&
(popcount(device) == 1) && ((device & ~AUDIO_DEVICE_OUT_ALL) == 0))
return true;
else
return false;
}
static inline bool audio_is_input_device(audio_devices_t device)
{
if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
device &= ~AUDIO_DEVICE_BIT_IN;
if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_IN_ALL) == 0))
return true;
}
return false;
}
static inline bool audio_is_output_devices(audio_devices_t device)
{
return (device & AUDIO_DEVICE_BIT_IN) == 0;
}
static inline bool audio_is_a2dp_device(audio_devices_t device)
{
if ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_A2DP))
return true;
else
return false;
}
static inline bool audio_is_bluetooth_sco_device(audio_devices_t device)
{
if ((device & AUDIO_DEVICE_BIT_IN) == 0) {
if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_OUT_ALL_SCO) == 0))
return true;
} else {
device &= ~AUDIO_DEVICE_BIT_IN;
if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) == 0))
return true;
}
return false;
}
static inline bool audio_is_usb_device(audio_devices_t device)
{
if ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_USB))
return true;
else
return false;
}
static inline bool audio_is_remote_submix_device(audio_devices_t device)
{
if ((device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) == AUDIO_DEVICE_OUT_REMOTE_SUBMIX
|| (device & AUDIO_DEVICE_IN_REMOTE_SUBMIX) == AUDIO_DEVICE_IN_REMOTE_SUBMIX)
return true;
else
return false;
}
static inline bool audio_is_input_channel(audio_channel_mask_t channel)
{
if ((channel & ~AUDIO_CHANNEL_IN_ALL) == 0)
return channel != 0;
else
return false;
}
static inline bool audio_is_output_channel(audio_channel_mask_t channel)
{
if ((channel & ~AUDIO_CHANNEL_OUT_ALL) == 0)
return channel != 0;
else
return false;
}
/* Derive an output channel mask from a channel count.
* This is to be used when the content channel mask is unknown. The 1, 2, 4, 5, 6, 7 and 8 channel
* cases are mapped to the standard game/home-theater layouts, but note that 4 is mapped to quad,
* and not stereo + FC + mono surround. A channel count of 3 is arbitrarily mapped to stereo + FC
* for continuity with stereo.
* Returns the matching channel mask, or 0 if the number of channels exceeds that of the
* configurations for which a default channel mask is defined.
*/
static inline audio_channel_mask_t audio_channel_out_mask_from_count(uint32_t channel_count)
{
switch(channel_count) {
case 1:
return AUDIO_CHANNEL_OUT_MONO;
case 2:
return AUDIO_CHANNEL_OUT_STEREO;
case 3:
return (AUDIO_CHANNEL_OUT_STEREO | AUDIO_CHANNEL_OUT_FRONT_CENTER);
case 4: // 4.0
return AUDIO_CHANNEL_OUT_QUAD;
case 5: // 5.0
return (AUDIO_CHANNEL_OUT_QUAD | AUDIO_CHANNEL_OUT_FRONT_CENTER);
case 6: // 5.1
return AUDIO_CHANNEL_OUT_5POINT1;
case 7: // 6.1
return (AUDIO_CHANNEL_OUT_5POINT1 | AUDIO_CHANNEL_OUT_BACK_CENTER);
case 8:
return AUDIO_CHANNEL_OUT_7POINT1;
default:
return 0;
}
}
/* Similar to above, but for input. Currently handles only mono and stereo. */
static inline audio_channel_mask_t audio_channel_in_mask_from_count(uint32_t channel_count)
{
switch (channel_count) {
case 1:
return AUDIO_CHANNEL_IN_MONO;
case 2:
return AUDIO_CHANNEL_IN_STEREO;
default:
return 0;
}
}
static inline bool audio_is_valid_format(audio_format_t format)
{
switch (format & AUDIO_FORMAT_MAIN_MASK) {
case AUDIO_FORMAT_PCM:
if (format != AUDIO_FORMAT_PCM_16_BIT &&
format != AUDIO_FORMAT_PCM_8_BIT) {
return false;
}
case AUDIO_FORMAT_MP3:
case AUDIO_FORMAT_AMR_NB:
case AUDIO_FORMAT_AMR_WB:
case AUDIO_FORMAT_AAC:
case AUDIO_FORMAT_HE_AAC_V1:
case AUDIO_FORMAT_HE_AAC_V2:
case AUDIO_FORMAT_VORBIS:
return true;
default:
return false;
}
}
static inline bool audio_is_linear_pcm(audio_format_t format)
{
return ((format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_PCM);
}
static inline size_t audio_bytes_per_sample(audio_format_t format)
{
size_t size = 0;
switch (format) {
case AUDIO_FORMAT_PCM_32_BIT:
case AUDIO_FORMAT_PCM_8_24_BIT:
size = sizeof(int32_t);
break;
case AUDIO_FORMAT_PCM_16_BIT:
size = sizeof(int16_t);
break;
case AUDIO_FORMAT_PCM_8_BIT:
size = sizeof(uint8_t);
break;
default:
break;
}
return size;
}
__END_DECLS
#endif // ANDROID_AUDIO_CORE_H
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