1365 lines
57 KiB
C
1365 lines
57 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_AUDIO_CORE_H
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#define ANDROID_AUDIO_CORE_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <cutils/bitops.h>
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__BEGIN_DECLS
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/* The enums were moved here mostly from
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* frameworks/base/include/media/AudioSystem.h
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*/
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/* device address used to refer to the standard remote submix */
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#define AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS "0"
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/* AudioFlinger and AudioPolicy services use I/O handles to identify audio sources and sinks */
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typedef int audio_io_handle_t;
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#define AUDIO_IO_HANDLE_NONE 0
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/* Audio stream types */
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typedef enum {
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/* These values must kept in sync with
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* frameworks/base/media/java/android/media/AudioSystem.java
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*/
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AUDIO_STREAM_DEFAULT = -1,
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AUDIO_STREAM_MIN = 0,
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AUDIO_STREAM_VOICE_CALL = 0,
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AUDIO_STREAM_SYSTEM = 1,
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AUDIO_STREAM_RING = 2,
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AUDIO_STREAM_MUSIC = 3,
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AUDIO_STREAM_ALARM = 4,
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AUDIO_STREAM_NOTIFICATION = 5,
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AUDIO_STREAM_BLUETOOTH_SCO = 6,
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AUDIO_STREAM_ENFORCED_AUDIBLE = 7, /* Sounds that cannot be muted by user
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* and must be routed to speaker
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*/
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AUDIO_STREAM_DTMF = 8,
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AUDIO_STREAM_TTS = 9,
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AUDIO_STREAM_CNT,
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AUDIO_STREAM_MAX = AUDIO_STREAM_CNT - 1,
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} audio_stream_type_t;
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/* Do not change these values without updating their counterparts
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* in frameworks/base/media/java/android/media/AudioAttributes.java
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*/
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typedef enum {
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AUDIO_CONTENT_TYPE_UNKNOWN = 0,
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AUDIO_CONTENT_TYPE_SPEECH = 1,
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AUDIO_CONTENT_TYPE_MUSIC = 2,
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AUDIO_CONTENT_TYPE_MOVIE = 3,
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AUDIO_CONTENT_TYPE_SONIFICATION = 4,
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AUDIO_CONTENT_TYPE_CNT,
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AUDIO_CONTENT_TYPE_MAX = AUDIO_CONTENT_TYPE_CNT - 1,
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} audio_content_type_t;
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/* Do not change these values without updating their counterparts
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* in frameworks/base/media/java/android/media/AudioAttributes.java
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*/
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typedef enum {
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AUDIO_USAGE_UNKNOWN = 0,
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AUDIO_USAGE_MEDIA = 1,
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AUDIO_USAGE_VOICE_COMMUNICATION = 2,
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AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING = 3,
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AUDIO_USAGE_ALARM = 4,
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AUDIO_USAGE_NOTIFICATION = 5,
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AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE = 6,
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AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST = 7,
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AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT = 8,
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AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED = 9,
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AUDIO_USAGE_NOTIFICATION_EVENT = 10,
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AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY = 11,
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AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE = 12,
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AUDIO_USAGE_ASSISTANCE_SONIFICATION = 13,
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AUDIO_USAGE_GAME = 14,
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AUDIO_USAGE_CNT,
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AUDIO_USAGE_MAX = AUDIO_USAGE_CNT - 1,
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} audio_usage_t;
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typedef uint32_t audio_flags_mask_t;
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/* Do not change these values without updating their counterparts
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* in frameworks/base/media/java/android/media/AudioAttributes.java
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*/
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enum {
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AUDIO_FLAG_AUDIBILITY_ENFORCED = 0x1,
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AUDIO_FLAG_SECURE = 0x2,
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AUDIO_FLAG_SCO = 0x4,
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AUDIO_FLAG_BEACON = 0x8,
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AUDIO_FLAG_HW_AV_SYNC = 0x10
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};
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/* Do not change these values without updating their counterparts
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* in frameworks/base/media/java/android/media/MediaRecorder.java,
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* frameworks/av/services/audiopolicy/AudioPolicyService.cpp,
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* and system/media/audio_effects/include/audio_effects/audio_effects_conf.h!
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*/
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typedef enum {
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AUDIO_SOURCE_DEFAULT = 0,
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AUDIO_SOURCE_MIC = 1,
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AUDIO_SOURCE_VOICE_UPLINK = 2,
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AUDIO_SOURCE_VOICE_DOWNLINK = 3,
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AUDIO_SOURCE_VOICE_CALL = 4,
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AUDIO_SOURCE_CAMCORDER = 5,
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AUDIO_SOURCE_VOICE_RECOGNITION = 6,
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AUDIO_SOURCE_VOICE_COMMUNICATION = 7,
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AUDIO_SOURCE_REMOTE_SUBMIX = 8, /* Source for the mix to be presented remotely. */
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/* An example of remote presentation is Wifi Display */
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/* where a dongle attached to a TV can be used to */
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/* play the mix captured by this audio source. */
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AUDIO_SOURCE_CNT,
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AUDIO_SOURCE_MAX = AUDIO_SOURCE_CNT - 1,
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AUDIO_SOURCE_HOTWORD = 1999, /* A low-priority, preemptible audio source for
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for background software hotword detection.
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Same tuning as AUDIO_SOURCE_VOICE_RECOGNITION.
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Used only internally to the framework. Not exposed
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at the audio HAL. */
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} audio_source_t;
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/* Audio attributes */
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#define AUDIO_ATTRIBUTES_TAGS_MAX_SIZE 256
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typedef struct {
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audio_content_type_t content_type;
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audio_usage_t usage;
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audio_source_t source;
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audio_flags_mask_t flags;
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char tags[AUDIO_ATTRIBUTES_TAGS_MAX_SIZE]; /* UTF8 */
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} audio_attributes_t;
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/* special audio session values
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* (XXX: should this be living in the audio effects land?)
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*/
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typedef enum {
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/* session for effects attached to a particular output stream
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* (value must be less than 0)
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*/
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AUDIO_SESSION_OUTPUT_STAGE = -1,
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/* session for effects applied to output mix. These effects can
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* be moved by audio policy manager to another output stream
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* (value must be 0)
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*/
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AUDIO_SESSION_OUTPUT_MIX = 0,
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/* application does not specify an explicit session ID to be used,
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* and requests a new session ID to be allocated
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* TODO use unique values for AUDIO_SESSION_OUTPUT_MIX and AUDIO_SESSION_ALLOCATE,
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* after all uses have been updated from 0 to the appropriate symbol, and have been tested.
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*/
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AUDIO_SESSION_ALLOCATE = 0,
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} audio_session_t;
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/* a unique ID allocated by AudioFlinger for use as a audio_io_handle_t or audio_session_t */
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typedef int audio_unique_id_t;
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#define AUDIO_UNIQUE_ID_ALLOCATE AUDIO_SESSION_ALLOCATE
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/* Audio sub formats (see enum audio_format). */
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/* PCM sub formats */
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typedef enum {
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/* All of these are in native byte order */
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AUDIO_FORMAT_PCM_SUB_16_BIT = 0x1, /* DO NOT CHANGE - PCM signed 16 bits */
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AUDIO_FORMAT_PCM_SUB_8_BIT = 0x2, /* DO NOT CHANGE - PCM unsigned 8 bits */
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AUDIO_FORMAT_PCM_SUB_32_BIT = 0x3, /* PCM signed .31 fixed point */
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AUDIO_FORMAT_PCM_SUB_8_24_BIT = 0x4, /* PCM signed 7.24 fixed point */
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AUDIO_FORMAT_PCM_SUB_FLOAT = 0x5, /* PCM single-precision floating point */
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AUDIO_FORMAT_PCM_SUB_24_BIT_PACKED = 0x6, /* PCM signed .23 fixed point packed in 3 bytes */
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} audio_format_pcm_sub_fmt_t;
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/* The audio_format_*_sub_fmt_t declarations are not currently used */
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/* MP3 sub format field definition : can use 11 LSBs in the same way as MP3
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* frame header to specify bit rate, stereo mode, version...
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*/
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typedef enum {
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AUDIO_FORMAT_MP3_SUB_NONE = 0x0,
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} audio_format_mp3_sub_fmt_t;
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/* AMR NB/WB sub format field definition: specify frame block interleaving,
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* bandwidth efficient or octet aligned, encoding mode for recording...
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*/
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typedef enum {
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AUDIO_FORMAT_AMR_SUB_NONE = 0x0,
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} audio_format_amr_sub_fmt_t;
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/* AAC sub format field definition: specify profile or bitrate for recording... */
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typedef enum {
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AUDIO_FORMAT_AAC_SUB_MAIN = 0x1,
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AUDIO_FORMAT_AAC_SUB_LC = 0x2,
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AUDIO_FORMAT_AAC_SUB_SSR = 0x4,
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AUDIO_FORMAT_AAC_SUB_LTP = 0x8,
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AUDIO_FORMAT_AAC_SUB_HE_V1 = 0x10,
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AUDIO_FORMAT_AAC_SUB_SCALABLE = 0x20,
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AUDIO_FORMAT_AAC_SUB_ERLC = 0x40,
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AUDIO_FORMAT_AAC_SUB_LD = 0x80,
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AUDIO_FORMAT_AAC_SUB_HE_V2 = 0x100,
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AUDIO_FORMAT_AAC_SUB_ELD = 0x200,
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} audio_format_aac_sub_fmt_t;
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/* VORBIS sub format field definition: specify quality for recording... */
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typedef enum {
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AUDIO_FORMAT_VORBIS_SUB_NONE = 0x0,
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} audio_format_vorbis_sub_fmt_t;
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/* Audio format consists of a main format field (upper 8 bits) and a sub format
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* field (lower 24 bits).
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*
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* The main format indicates the main codec type. The sub format field
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* indicates options and parameters for each format. The sub format is mainly
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* used for record to indicate for instance the requested bitrate or profile.
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* It can also be used for certain formats to give informations not present in
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* the encoded audio stream (e.g. octet alignement for AMR).
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*/
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typedef enum {
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AUDIO_FORMAT_INVALID = 0xFFFFFFFFUL,
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AUDIO_FORMAT_DEFAULT = 0,
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AUDIO_FORMAT_PCM = 0x00000000UL, /* DO NOT CHANGE */
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AUDIO_FORMAT_MP3 = 0x01000000UL,
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AUDIO_FORMAT_AMR_NB = 0x02000000UL,
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AUDIO_FORMAT_AMR_WB = 0x03000000UL,
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AUDIO_FORMAT_AAC = 0x04000000UL,
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AUDIO_FORMAT_HE_AAC_V1 = 0x05000000UL, /* Deprecated, Use AUDIO_FORMAT_AAC_HE_V1*/
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AUDIO_FORMAT_HE_AAC_V2 = 0x06000000UL, /* Deprecated, Use AUDIO_FORMAT_AAC_HE_V2*/
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AUDIO_FORMAT_VORBIS = 0x07000000UL,
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AUDIO_FORMAT_OPUS = 0x08000000UL,
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AUDIO_FORMAT_AC3 = 0x09000000UL,
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AUDIO_FORMAT_E_AC3 = 0x0A000000UL,
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AUDIO_FORMAT_MAIN_MASK = 0xFF000000UL,
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AUDIO_FORMAT_SUB_MASK = 0x00FFFFFFUL,
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/* Aliases */
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/* note != AudioFormat.ENCODING_PCM_16BIT */
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AUDIO_FORMAT_PCM_16_BIT = (AUDIO_FORMAT_PCM |
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AUDIO_FORMAT_PCM_SUB_16_BIT),
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/* note != AudioFormat.ENCODING_PCM_8BIT */
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AUDIO_FORMAT_PCM_8_BIT = (AUDIO_FORMAT_PCM |
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AUDIO_FORMAT_PCM_SUB_8_BIT),
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AUDIO_FORMAT_PCM_32_BIT = (AUDIO_FORMAT_PCM |
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AUDIO_FORMAT_PCM_SUB_32_BIT),
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AUDIO_FORMAT_PCM_8_24_BIT = (AUDIO_FORMAT_PCM |
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AUDIO_FORMAT_PCM_SUB_8_24_BIT),
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AUDIO_FORMAT_PCM_FLOAT = (AUDIO_FORMAT_PCM |
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AUDIO_FORMAT_PCM_SUB_FLOAT),
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AUDIO_FORMAT_PCM_24_BIT_PACKED = (AUDIO_FORMAT_PCM |
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AUDIO_FORMAT_PCM_SUB_24_BIT_PACKED),
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AUDIO_FORMAT_AAC_MAIN = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_MAIN),
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AUDIO_FORMAT_AAC_LC = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_LC),
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AUDIO_FORMAT_AAC_SSR = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_SSR),
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AUDIO_FORMAT_AAC_LTP = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_LTP),
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AUDIO_FORMAT_AAC_HE_V1 = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_HE_V1),
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AUDIO_FORMAT_AAC_SCALABLE = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_SCALABLE),
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AUDIO_FORMAT_AAC_ERLC = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_ERLC),
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AUDIO_FORMAT_AAC_LD = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_LD),
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AUDIO_FORMAT_AAC_HE_V2 = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_HE_V2),
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AUDIO_FORMAT_AAC_ELD = (AUDIO_FORMAT_AAC |
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AUDIO_FORMAT_AAC_SUB_ELD),
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} audio_format_t;
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/* For the channel mask for position assignment representation */
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enum {
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/* These can be a complete audio_channel_mask_t. */
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AUDIO_CHANNEL_NONE = 0x0,
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AUDIO_CHANNEL_INVALID = 0xC0000000,
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/* These can be the bits portion of an audio_channel_mask_t
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* with representation AUDIO_CHANNEL_REPRESENTATION_POSITION.
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* Using these bits as a complete audio_channel_mask_t is deprecated.
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*/
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/* output channels */
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AUDIO_CHANNEL_OUT_FRONT_LEFT = 0x1,
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AUDIO_CHANNEL_OUT_FRONT_RIGHT = 0x2,
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AUDIO_CHANNEL_OUT_FRONT_CENTER = 0x4,
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AUDIO_CHANNEL_OUT_LOW_FREQUENCY = 0x8,
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AUDIO_CHANNEL_OUT_BACK_LEFT = 0x10,
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AUDIO_CHANNEL_OUT_BACK_RIGHT = 0x20,
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AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER = 0x40,
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AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER = 0x80,
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AUDIO_CHANNEL_OUT_BACK_CENTER = 0x100,
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AUDIO_CHANNEL_OUT_SIDE_LEFT = 0x200,
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AUDIO_CHANNEL_OUT_SIDE_RIGHT = 0x400,
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AUDIO_CHANNEL_OUT_TOP_CENTER = 0x800,
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AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT = 0x1000,
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AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER = 0x2000,
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AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT = 0x4000,
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AUDIO_CHANNEL_OUT_TOP_BACK_LEFT = 0x8000,
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AUDIO_CHANNEL_OUT_TOP_BACK_CENTER = 0x10000,
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AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT = 0x20000,
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/* TODO: should these be considered complete channel masks, or only bits? */
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AUDIO_CHANNEL_OUT_MONO = AUDIO_CHANNEL_OUT_FRONT_LEFT,
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AUDIO_CHANNEL_OUT_STEREO = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT),
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AUDIO_CHANNEL_OUT_QUAD = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT |
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AUDIO_CHANNEL_OUT_BACK_LEFT |
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AUDIO_CHANNEL_OUT_BACK_RIGHT),
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AUDIO_CHANNEL_OUT_QUAD_BACK = AUDIO_CHANNEL_OUT_QUAD,
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/* like AUDIO_CHANNEL_OUT_QUAD_BACK with *_SIDE_* instead of *_BACK_* */
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AUDIO_CHANNEL_OUT_QUAD_SIDE = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT |
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AUDIO_CHANNEL_OUT_SIDE_LEFT |
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AUDIO_CHANNEL_OUT_SIDE_RIGHT),
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AUDIO_CHANNEL_OUT_5POINT1 = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT |
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AUDIO_CHANNEL_OUT_FRONT_CENTER |
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AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
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AUDIO_CHANNEL_OUT_BACK_LEFT |
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AUDIO_CHANNEL_OUT_BACK_RIGHT),
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AUDIO_CHANNEL_OUT_5POINT1_BACK = AUDIO_CHANNEL_OUT_5POINT1,
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/* like AUDIO_CHANNEL_OUT_5POINT1_BACK with *_SIDE_* instead of *_BACK_* */
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AUDIO_CHANNEL_OUT_5POINT1_SIDE = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT |
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AUDIO_CHANNEL_OUT_FRONT_CENTER |
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AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
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AUDIO_CHANNEL_OUT_SIDE_LEFT |
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AUDIO_CHANNEL_OUT_SIDE_RIGHT),
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// matches the correct AudioFormat.CHANNEL_OUT_7POINT1_SURROUND definition for 7.1
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AUDIO_CHANNEL_OUT_7POINT1 = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT |
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AUDIO_CHANNEL_OUT_FRONT_CENTER |
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AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
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AUDIO_CHANNEL_OUT_BACK_LEFT |
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AUDIO_CHANNEL_OUT_BACK_RIGHT |
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AUDIO_CHANNEL_OUT_SIDE_LEFT |
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AUDIO_CHANNEL_OUT_SIDE_RIGHT),
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AUDIO_CHANNEL_OUT_ALL = (AUDIO_CHANNEL_OUT_FRONT_LEFT |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT |
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AUDIO_CHANNEL_OUT_FRONT_CENTER |
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AUDIO_CHANNEL_OUT_LOW_FREQUENCY |
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AUDIO_CHANNEL_OUT_BACK_LEFT |
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AUDIO_CHANNEL_OUT_BACK_RIGHT |
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AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER |
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AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER |
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AUDIO_CHANNEL_OUT_BACK_CENTER|
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AUDIO_CHANNEL_OUT_SIDE_LEFT|
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AUDIO_CHANNEL_OUT_SIDE_RIGHT|
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AUDIO_CHANNEL_OUT_TOP_CENTER|
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AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT|
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AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER|
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AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT|
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AUDIO_CHANNEL_OUT_TOP_BACK_LEFT|
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AUDIO_CHANNEL_OUT_TOP_BACK_CENTER|
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AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT),
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/* These are bits only, not complete values */
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/* input channels */
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AUDIO_CHANNEL_IN_LEFT = 0x4,
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AUDIO_CHANNEL_IN_RIGHT = 0x8,
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AUDIO_CHANNEL_IN_FRONT = 0x10,
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AUDIO_CHANNEL_IN_BACK = 0x20,
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AUDIO_CHANNEL_IN_LEFT_PROCESSED = 0x40,
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AUDIO_CHANNEL_IN_RIGHT_PROCESSED = 0x80,
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AUDIO_CHANNEL_IN_FRONT_PROCESSED = 0x100,
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AUDIO_CHANNEL_IN_BACK_PROCESSED = 0x200,
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AUDIO_CHANNEL_IN_PRESSURE = 0x400,
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AUDIO_CHANNEL_IN_X_AXIS = 0x800,
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AUDIO_CHANNEL_IN_Y_AXIS = 0x1000,
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AUDIO_CHANNEL_IN_Z_AXIS = 0x2000,
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AUDIO_CHANNEL_IN_VOICE_UPLINK = 0x4000,
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AUDIO_CHANNEL_IN_VOICE_DNLINK = 0x8000,
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/* TODO: should these be considered complete channel masks, or only bits, or deprecated? */
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AUDIO_CHANNEL_IN_MONO = AUDIO_CHANNEL_IN_FRONT,
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AUDIO_CHANNEL_IN_STEREO = (AUDIO_CHANNEL_IN_LEFT | AUDIO_CHANNEL_IN_RIGHT),
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AUDIO_CHANNEL_IN_FRONT_BACK = (AUDIO_CHANNEL_IN_FRONT | AUDIO_CHANNEL_IN_BACK),
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AUDIO_CHANNEL_IN_ALL = (AUDIO_CHANNEL_IN_LEFT |
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AUDIO_CHANNEL_IN_RIGHT |
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AUDIO_CHANNEL_IN_FRONT |
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AUDIO_CHANNEL_IN_BACK|
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|
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),
|
|
};
|
|
|
|
/* A channel mask per se only defines the presence or absence of a channel, not the order.
|
|
* But see AUDIO_INTERLEAVE_* below for the platform convention of order.
|
|
*
|
|
* audio_channel_mask_t is an opaque type and its internal layout should not
|
|
* be assumed as it may change in the future.
|
|
* Instead, always use the functions declared in this header to examine.
|
|
*
|
|
* These are the current representations:
|
|
*
|
|
* AUDIO_CHANNEL_REPRESENTATION_POSITION
|
|
* is a channel mask representation for position assignment.
|
|
* Each low-order bit corresponds to the spatial position of a transducer (output),
|
|
* or interpretation of channel (input).
|
|
* The user of a channel mask needs to know the context of whether it is for output or input.
|
|
* The constants AUDIO_CHANNEL_OUT_* or AUDIO_CHANNEL_IN_* apply to the bits portion.
|
|
* It is not permitted for no bits to be set.
|
|
*
|
|
* AUDIO_CHANNEL_REPRESENTATION_INDEX
|
|
* is a channel mask representation for index assignment.
|
|
* Each low-order bit corresponds to a selected channel.
|
|
* There is no platform interpretation of the various bits.
|
|
* There is no concept of output or input.
|
|
* It is not permitted for no bits to be set.
|
|
*
|
|
* All other representations are reserved for future use.
|
|
*
|
|
* Warning: current representation distinguishes between input and output, but this will not the be
|
|
* case in future revisions of the platform. Wherever there is an ambiguity between input and output
|
|
* that is currently resolved by checking the channel mask, the implementer should look for ways to
|
|
* fix it with additional information outside of the mask.
|
|
*/
|
|
typedef uint32_t audio_channel_mask_t;
|
|
|
|
/* Maximum number of channels for all representations */
|
|
#define AUDIO_CHANNEL_COUNT_MAX 30
|
|
|
|
/* log(2) of maximum number of representations, not part of public API */
|
|
#define AUDIO_CHANNEL_REPRESENTATION_LOG2 2
|
|
|
|
/* Representations */
|
|
typedef enum {
|
|
AUDIO_CHANNEL_REPRESENTATION_POSITION = 0, // must be zero for compatibility
|
|
// 1 is reserved for future use
|
|
AUDIO_CHANNEL_REPRESENTATION_INDEX = 2,
|
|
// 3 is reserved for future use
|
|
} audio_channel_representation_t;
|
|
|
|
/* The return value is undefined if the channel mask is invalid. */
|
|
static inline uint32_t audio_channel_mask_get_bits(audio_channel_mask_t channel)
|
|
{
|
|
return channel & ((1 << AUDIO_CHANNEL_COUNT_MAX) - 1);
|
|
}
|
|
|
|
/* The return value is undefined if the channel mask is invalid. */
|
|
static inline audio_channel_representation_t audio_channel_mask_get_representation(
|
|
audio_channel_mask_t channel)
|
|
{
|
|
// The right shift should be sufficient, but also "and" for safety in case mask is not 32 bits
|
|
return (audio_channel_representation_t)
|
|
((channel >> AUDIO_CHANNEL_COUNT_MAX) & ((1 << AUDIO_CHANNEL_REPRESENTATION_LOG2) - 1));
|
|
}
|
|
|
|
/* Returns true if the channel mask is valid,
|
|
* or returns false for AUDIO_CHANNEL_NONE, AUDIO_CHANNEL_INVALID, and other invalid values.
|
|
* This function is unable to determine whether a channel mask for position assignment
|
|
* is invalid because an output mask has an invalid output bit set,
|
|
* or because an input mask has an invalid input bit set.
|
|
* All other APIs that take a channel mask assume that it is valid.
|
|
*/
|
|
static inline bool audio_channel_mask_is_valid(audio_channel_mask_t channel)
|
|
{
|
|
uint32_t bits = audio_channel_mask_get_bits(channel);
|
|
audio_channel_representation_t representation = audio_channel_mask_get_representation(channel);
|
|
switch (representation) {
|
|
case AUDIO_CHANNEL_REPRESENTATION_POSITION:
|
|
case AUDIO_CHANNEL_REPRESENTATION_INDEX:
|
|
break;
|
|
default:
|
|
bits = 0;
|
|
break;
|
|
}
|
|
return bits != 0;
|
|
}
|
|
|
|
/* Not part of public API */
|
|
static inline audio_channel_mask_t audio_channel_mask_from_representation_and_bits(
|
|
audio_channel_representation_t representation, uint32_t bits)
|
|
{
|
|
return (audio_channel_mask_t) ((representation << AUDIO_CHANNEL_COUNT_MAX) | bits);
|
|
}
|
|
|
|
/* Expresses the convention when stereo audio samples are stored interleaved
|
|
* in an array. This should improve readability by allowing code to use
|
|
* symbolic indices instead of hard-coded [0] and [1].
|
|
*
|
|
* For multi-channel beyond stereo, the platform convention is that channels
|
|
* are interleaved in order from least significant channel mask bit
|
|
* to most significant channel mask bit, with unused bits skipped.
|
|
* Any exceptions to this convention will be noted at the appropriate API.
|
|
*/
|
|
enum {
|
|
AUDIO_INTERLEAVE_LEFT = 0,
|
|
AUDIO_INTERLEAVE_RIGHT = 1,
|
|
};
|
|
|
|
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;
|
|
|
|
/* This enum is deprecated */
|
|
typedef enum {
|
|
AUDIO_IN_ACOUSTICS_NONE = 0,
|
|
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_HDMI = AUDIO_DEVICE_OUT_AUX_DIGITAL,
|
|
/* uses an analog connection (multiplexed over the USB connector pins for instance) */
|
|
AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET = 0x800,
|
|
AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET = 0x1000,
|
|
/* USB accessory mode: your Android device is a USB device and the dock is a USB host */
|
|
AUDIO_DEVICE_OUT_USB_ACCESSORY = 0x2000,
|
|
/* USB host mode: your Android device is a USB host and the dock is a USB device */
|
|
AUDIO_DEVICE_OUT_USB_DEVICE = 0x4000,
|
|
AUDIO_DEVICE_OUT_REMOTE_SUBMIX = 0x8000,
|
|
/* Telephony voice TX path */
|
|
AUDIO_DEVICE_OUT_TELEPHONY_TX = 0x10000,
|
|
/* Analog jack with line impedance detected */
|
|
AUDIO_DEVICE_OUT_LINE = 0x20000,
|
|
/* HDMI Audio Return Channel */
|
|
AUDIO_DEVICE_OUT_HDMI_ARC = 0x40000,
|
|
/* S/PDIF out */
|
|
AUDIO_DEVICE_OUT_SPDIF = 0x80000,
|
|
/* FM transmitter out */
|
|
AUDIO_DEVICE_OUT_FM = 0x100000,
|
|
/* Line out for av devices */
|
|
AUDIO_DEVICE_OUT_AUX_LINE = 0x200000,
|
|
/* limited-output speaker device for acoustic safety */
|
|
AUDIO_DEVICE_OUT_SPEAKER_SAFE = 0x400000,
|
|
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_HDMI |
|
|
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_TELEPHONY_TX |
|
|
AUDIO_DEVICE_OUT_LINE |
|
|
AUDIO_DEVICE_OUT_HDMI_ARC |
|
|
AUDIO_DEVICE_OUT_SPDIF |
|
|
AUDIO_DEVICE_OUT_FM |
|
|
AUDIO_DEVICE_OUT_AUX_LINE |
|
|
AUDIO_DEVICE_OUT_SPEAKER_SAFE |
|
|
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_HDMI = AUDIO_DEVICE_IN_AUX_DIGITAL,
|
|
/* Telephony voice RX path */
|
|
AUDIO_DEVICE_IN_VOICE_CALL = AUDIO_DEVICE_BIT_IN | 0x40,
|
|
AUDIO_DEVICE_IN_TELEPHONY_RX = AUDIO_DEVICE_IN_VOICE_CALL,
|
|
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,
|
|
/* FM tuner input */
|
|
AUDIO_DEVICE_IN_FM_TUNER = AUDIO_DEVICE_BIT_IN | 0x2000,
|
|
/* TV tuner input */
|
|
AUDIO_DEVICE_IN_TV_TUNER = AUDIO_DEVICE_BIT_IN | 0x4000,
|
|
/* Analog jack with line impedance detected */
|
|
AUDIO_DEVICE_IN_LINE = AUDIO_DEVICE_BIT_IN | 0x8000,
|
|
/* S/PDIF in */
|
|
AUDIO_DEVICE_IN_SPDIF = AUDIO_DEVICE_BIT_IN | 0x10000,
|
|
AUDIO_DEVICE_IN_BLUETOOTH_A2DP = AUDIO_DEVICE_BIT_IN | 0x20000,
|
|
AUDIO_DEVICE_IN_LOOPBACK = AUDIO_DEVICE_BIT_IN | 0x40000,
|
|
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_HDMI |
|
|
AUDIO_DEVICE_IN_TELEPHONY_RX |
|
|
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_FM_TUNER |
|
|
AUDIO_DEVICE_IN_TV_TUNER |
|
|
AUDIO_DEVICE_IN_LINE |
|
|
AUDIO_DEVICE_IN_SPDIF |
|
|
AUDIO_DEVICE_IN_BLUETOOTH_A2DP |
|
|
AUDIO_DEVICE_IN_LOOPBACK |
|
|
AUDIO_DEVICE_IN_DEFAULT),
|
|
AUDIO_DEVICE_IN_ALL_SCO = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET,
|
|
AUDIO_DEVICE_IN_ALL_USB = (AUDIO_DEVICE_IN_USB_ACCESSORY |
|
|
AUDIO_DEVICE_IN_USB_DEVICE),
|
|
};
|
|
|
|
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_FLAG_HW_AV_SYNC = 0x40 // output uses a hardware A/V synchronization source
|
|
} 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),
|
|
sample_rate: 0,
|
|
channel_mask: 0,
|
|
format: AUDIO_FORMAT_DEFAULT,
|
|
stream_type: AUDIO_STREAM_VOICE_CALL,
|
|
bit_rate: 0,
|
|
duration_us: 0,
|
|
has_video: false,
|
|
is_streaming: false
|
|
};
|
|
|
|
/* common audio stream configuration parameters
|
|
* You should memset() the entire structure to zero before use to
|
|
* ensure forward compatibility
|
|
*/
|
|
struct audio_config {
|
|
uint32_t sample_rate;
|
|
audio_channel_mask_t channel_mask;
|
|
audio_format_t format;
|
|
audio_offload_info_t offload_info;
|
|
size_t frame_count;
|
|
};
|
|
typedef struct audio_config audio_config_t;
|
|
|
|
static const audio_config_t AUDIO_CONFIG_INITIALIZER = {
|
|
sample_rate: 0,
|
|
channel_mask: AUDIO_CHANNEL_NONE,
|
|
format: AUDIO_FORMAT_DEFAULT,
|
|
offload_info: {
|
|
version: AUDIO_OFFLOAD_INFO_VERSION_CURRENT,
|
|
size: sizeof(audio_offload_info_t),
|
|
sample_rate: 0,
|
|
channel_mask: 0,
|
|
format: AUDIO_FORMAT_DEFAULT,
|
|
stream_type: AUDIO_STREAM_VOICE_CALL,
|
|
bit_rate: 0,
|
|
duration_us: 0,
|
|
has_video: false,
|
|
is_streaming: false
|
|
},
|
|
frame_count: 0,
|
|
};
|
|
|
|
|
|
/* audio hw module handle functions or structures referencing a module */
|
|
typedef int audio_module_handle_t;
|
|
|
|
/******************************
|
|
* Volume control
|
|
*****************************/
|
|
|
|
/* If the audio hardware supports gain control on some audio paths,
|
|
* the platform can expose them in the audio_policy.conf file. The audio HAL
|
|
* will then implement gain control functions that will use the following data
|
|
* structures. */
|
|
|
|
/* Type of gain control exposed by an audio port */
|
|
#define AUDIO_GAIN_MODE_JOINT 0x1 /* supports joint channel gain control */
|
|
#define AUDIO_GAIN_MODE_CHANNELS 0x2 /* supports separate channel gain control */
|
|
#define AUDIO_GAIN_MODE_RAMP 0x4 /* supports gain ramps */
|
|
|
|
typedef uint32_t audio_gain_mode_t;
|
|
|
|
|
|
/* An audio_gain struct is a representation of a gain stage.
|
|
* A gain stage is always attached to an audio port. */
|
|
struct audio_gain {
|
|
audio_gain_mode_t mode; /* e.g. AUDIO_GAIN_MODE_JOINT */
|
|
audio_channel_mask_t channel_mask; /* channels which gain an be controlled.
|
|
N/A if AUDIO_GAIN_MODE_CHANNELS is not supported */
|
|
int min_value; /* minimum gain value in millibels */
|
|
int max_value; /* maximum gain value in millibels */
|
|
int default_value; /* default gain value in millibels */
|
|
unsigned int step_value; /* gain step in millibels */
|
|
unsigned int min_ramp_ms; /* minimum ramp duration in ms */
|
|
unsigned int max_ramp_ms; /* maximum ramp duration in ms */
|
|
};
|
|
|
|
/* The gain configuration structure is used to get or set the gain values of a
|
|
* given port */
|
|
struct audio_gain_config {
|
|
int index; /* index of the corresponding audio_gain in the
|
|
audio_port gains[] table */
|
|
audio_gain_mode_t mode; /* mode requested for this command */
|
|
audio_channel_mask_t channel_mask; /* channels which gain value follows.
|
|
N/A in joint mode */
|
|
int values[sizeof(audio_channel_mask_t) * 8]; /* gain values in millibels
|
|
for each channel ordered from LSb to MSb in
|
|
channel mask. The number of values is 1 in joint
|
|
mode or popcount(channel_mask) */
|
|
unsigned int ramp_duration_ms; /* ramp duration in ms */
|
|
};
|
|
|
|
/******************************
|
|
* Routing control
|
|
*****************************/
|
|
|
|
/* Types defined here are used to describe an audio source or sink at internal
|
|
* framework interfaces (audio policy, patch panel) or at the audio HAL.
|
|
* Sink and sources are grouped in a concept of “audio port” representing an
|
|
* audio end point at the edge of the system managed by the module exposing
|
|
* the interface. */
|
|
|
|
/* Audio port role: either source or sink */
|
|
typedef enum {
|
|
AUDIO_PORT_ROLE_NONE,
|
|
AUDIO_PORT_ROLE_SOURCE,
|
|
AUDIO_PORT_ROLE_SINK,
|
|
} audio_port_role_t;
|
|
|
|
/* Audio port type indicates if it is a session (e.g AudioTrack),
|
|
* a mix (e.g PlaybackThread output) or a physical device
|
|
* (e.g AUDIO_DEVICE_OUT_SPEAKER) */
|
|
typedef enum {
|
|
AUDIO_PORT_TYPE_NONE,
|
|
AUDIO_PORT_TYPE_DEVICE,
|
|
AUDIO_PORT_TYPE_MIX,
|
|
AUDIO_PORT_TYPE_SESSION,
|
|
} audio_port_type_t;
|
|
|
|
/* Each port has a unique ID or handle allocated by policy manager */
|
|
typedef int audio_port_handle_t;
|
|
#define AUDIO_PORT_HANDLE_NONE 0
|
|
|
|
|
|
/* maximum audio device address length */
|
|
#define AUDIO_DEVICE_MAX_ADDRESS_LEN 32
|
|
|
|
/* extension for audio port configuration structure when the audio port is a
|
|
* hardware device */
|
|
struct audio_port_config_device_ext {
|
|
audio_module_handle_t hw_module; /* module the device is attached to */
|
|
audio_devices_t type; /* device type (e.g AUDIO_DEVICE_OUT_SPEAKER) */
|
|
char address[AUDIO_DEVICE_MAX_ADDRESS_LEN]; /* device address. "" if N/A */
|
|
};
|
|
|
|
/* extension for audio port configuration structure when the audio port is a
|
|
* sub mix */
|
|
struct audio_port_config_mix_ext {
|
|
audio_module_handle_t hw_module; /* module the stream is attached to */
|
|
audio_io_handle_t handle; /* I/O handle of the input/output stream */
|
|
union {
|
|
//TODO: change use case for output streams: use strategy and mixer attributes
|
|
audio_stream_type_t stream;
|
|
audio_source_t source;
|
|
} usecase;
|
|
};
|
|
|
|
/* extension for audio port configuration structure when the audio port is an
|
|
* audio session */
|
|
struct audio_port_config_session_ext {
|
|
audio_session_t session; /* audio session */
|
|
};
|
|
|
|
/* Flags indicating which fields are to be considered in struct audio_port_config */
|
|
#define AUDIO_PORT_CONFIG_SAMPLE_RATE 0x1
|
|
#define AUDIO_PORT_CONFIG_CHANNEL_MASK 0x2
|
|
#define AUDIO_PORT_CONFIG_FORMAT 0x4
|
|
#define AUDIO_PORT_CONFIG_GAIN 0x8
|
|
#define AUDIO_PORT_CONFIG_ALL (AUDIO_PORT_CONFIG_SAMPLE_RATE | \
|
|
AUDIO_PORT_CONFIG_CHANNEL_MASK | \
|
|
AUDIO_PORT_CONFIG_FORMAT | \
|
|
AUDIO_PORT_CONFIG_GAIN)
|
|
|
|
/* audio port configuration structure used to specify a particular configuration of
|
|
* an audio port */
|
|
struct audio_port_config {
|
|
audio_port_handle_t id; /* port unique ID */
|
|
audio_port_role_t role; /* sink or source */
|
|
audio_port_type_t type; /* device, mix ... */
|
|
unsigned int config_mask; /* e.g AUDIO_PORT_CONFIG_ALL */
|
|
unsigned int sample_rate; /* sampling rate in Hz */
|
|
audio_channel_mask_t channel_mask; /* channel mask if applicable */
|
|
audio_format_t format; /* format if applicable */
|
|
struct audio_gain_config gain; /* gain to apply if applicable */
|
|
union {
|
|
struct audio_port_config_device_ext device; /* device specific info */
|
|
struct audio_port_config_mix_ext mix; /* mix specific info */
|
|
struct audio_port_config_session_ext session; /* session specific info */
|
|
} ext;
|
|
};
|
|
|
|
|
|
/* max number of sampling rates in audio port */
|
|
#define AUDIO_PORT_MAX_SAMPLING_RATES 16
|
|
/* max number of channel masks in audio port */
|
|
#define AUDIO_PORT_MAX_CHANNEL_MASKS 16
|
|
/* max number of audio formats in audio port */
|
|
#define AUDIO_PORT_MAX_FORMATS 16
|
|
/* max number of gain controls in audio port */
|
|
#define AUDIO_PORT_MAX_GAINS 16
|
|
|
|
/* extension for audio port structure when the audio port is a hardware device */
|
|
struct audio_port_device_ext {
|
|
audio_module_handle_t hw_module; /* module the device is attached to */
|
|
audio_devices_t type; /* device type (e.g AUDIO_DEVICE_OUT_SPEAKER) */
|
|
char address[AUDIO_DEVICE_MAX_ADDRESS_LEN];
|
|
};
|
|
|
|
/* Latency class of the audio mix */
|
|
typedef enum {
|
|
AUDIO_LATENCY_LOW,
|
|
AUDIO_LATENCY_NORMAL,
|
|
} audio_mix_latency_class_t;
|
|
|
|
/* extension for audio port structure when the audio port is a sub mix */
|
|
struct audio_port_mix_ext {
|
|
audio_module_handle_t hw_module; /* module the stream is attached to */
|
|
audio_io_handle_t handle; /* I/O handle of the input.output stream */
|
|
audio_mix_latency_class_t latency_class; /* latency class */
|
|
// other attributes: routing strategies
|
|
};
|
|
|
|
/* extension for audio port structure when the audio port is an audio session */
|
|
struct audio_port_session_ext {
|
|
audio_session_t session; /* audio session */
|
|
};
|
|
|
|
|
|
struct audio_port {
|
|
audio_port_handle_t id; /* port unique ID */
|
|
audio_port_role_t role; /* sink or source */
|
|
audio_port_type_t type; /* device, mix ... */
|
|
unsigned int num_sample_rates; /* number of sampling rates in following array */
|
|
unsigned int sample_rates[AUDIO_PORT_MAX_SAMPLING_RATES];
|
|
unsigned int num_channel_masks; /* number of channel masks in following array */
|
|
audio_channel_mask_t channel_masks[AUDIO_PORT_MAX_CHANNEL_MASKS];
|
|
unsigned int num_formats; /* number of formats in following array */
|
|
audio_format_t formats[AUDIO_PORT_MAX_FORMATS];
|
|
unsigned int num_gains; /* number of gains in following array */
|
|
struct audio_gain gains[AUDIO_PORT_MAX_GAINS];
|
|
struct audio_port_config active_config; /* current audio port configuration */
|
|
union {
|
|
struct audio_port_device_ext device;
|
|
struct audio_port_mix_ext mix;
|
|
struct audio_port_session_ext session;
|
|
} ext;
|
|
};
|
|
|
|
/* An audio patch represents a connection between one or more source ports and
|
|
* one or more sink ports. Patches are connected and disconnected by audio policy manager or by
|
|
* applications via framework APIs.
|
|
* Each patch is identified by a handle at the interface used to create that patch. For instance,
|
|
* when a patch is created by the audio HAL, the HAL allocates and returns a handle.
|
|
* This handle is unique to a given audio HAL hardware module.
|
|
* But the same patch receives another system wide unique handle allocated by the framework.
|
|
* This unique handle is used for all transactions inside the framework.
|
|
*/
|
|
typedef int audio_patch_handle_t;
|
|
#define AUDIO_PATCH_HANDLE_NONE 0
|
|
|
|
#define AUDIO_PATCH_PORTS_MAX 16
|
|
|
|
struct audio_patch {
|
|
audio_patch_handle_t id; /* patch unique ID */
|
|
unsigned int num_sources; /* number of sources in following array */
|
|
struct audio_port_config sources[AUDIO_PATCH_PORTS_MAX];
|
|
unsigned int num_sinks; /* number of sinks in following array */
|
|
struct audio_port_config sinks[AUDIO_PATCH_PORTS_MAX];
|
|
};
|
|
|
|
|
|
|
|
/* a HW synchronization source returned by the audio HAL */
|
|
typedef uint32_t audio_hw_sync_t;
|
|
|
|
/* an invalid HW synchronization source indicating an error */
|
|
#define AUDIO_HW_SYNC_INVALID 0
|
|
|
|
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_in_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_BLUETOOTH_A2DP))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static inline bool audio_is_a2dp_out_device(audio_devices_t device)
|
|
{
|
|
if ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_A2DP))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
// Deprecated - use audio_is_a2dp_out_device() instead
|
|
static inline bool audio_is_a2dp_device(audio_devices_t device)
|
|
{
|
|
return audio_is_a2dp_out_device(device);
|
|
}
|
|
|
|
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_out_device(audio_devices_t device)
|
|
{
|
|
return ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_USB));
|
|
}
|
|
|
|
static inline bool audio_is_usb_in_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_USB) != 0)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* OBSOLETE - use audio_is_usb_out_device() instead. */
|
|
static inline bool audio_is_usb_device(audio_devices_t device)
|
|
{
|
|
return audio_is_usb_out_device(device);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* Returns true if:
|
|
* representation is valid, and
|
|
* there is at least one channel bit set which _could_ correspond to an input channel, and
|
|
* there are no channel bits set which could _not_ correspond to an input channel.
|
|
* Otherwise returns false.
|
|
*/
|
|
static inline bool audio_is_input_channel(audio_channel_mask_t channel)
|
|
{
|
|
uint32_t bits = audio_channel_mask_get_bits(channel);
|
|
switch (audio_channel_mask_get_representation(channel)) {
|
|
case AUDIO_CHANNEL_REPRESENTATION_POSITION:
|
|
if (bits & ~AUDIO_CHANNEL_IN_ALL) {
|
|
bits = 0;
|
|
}
|
|
// fall through
|
|
case AUDIO_CHANNEL_REPRESENTATION_INDEX:
|
|
return bits != 0;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* Returns true if:
|
|
* representation is valid, and
|
|
* there is at least one channel bit set which _could_ correspond to an output channel, and
|
|
* there are no channel bits set which could _not_ correspond to an output channel.
|
|
* Otherwise returns false.
|
|
*/
|
|
static inline bool audio_is_output_channel(audio_channel_mask_t channel)
|
|
{
|
|
uint32_t bits = audio_channel_mask_get_bits(channel);
|
|
switch (audio_channel_mask_get_representation(channel)) {
|
|
case AUDIO_CHANNEL_REPRESENTATION_POSITION:
|
|
if (bits & ~AUDIO_CHANNEL_OUT_ALL) {
|
|
bits = 0;
|
|
}
|
|
// fall through
|
|
case AUDIO_CHANNEL_REPRESENTATION_INDEX:
|
|
return bits != 0;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* Returns the number of channels from an input channel mask,
|
|
* used in the context of audio input or recording.
|
|
* If a channel bit is set which could _not_ correspond to an input channel,
|
|
* it is excluded from the count.
|
|
* Returns zero if the representation is invalid.
|
|
*/
|
|
static inline uint32_t audio_channel_count_from_in_mask(audio_channel_mask_t channel)
|
|
{
|
|
uint32_t bits = audio_channel_mask_get_bits(channel);
|
|
switch (audio_channel_mask_get_representation(channel)) {
|
|
case AUDIO_CHANNEL_REPRESENTATION_POSITION:
|
|
// TODO: We can now merge with from_out_mask and remove anding
|
|
bits &= AUDIO_CHANNEL_IN_ALL;
|
|
// fall through
|
|
case AUDIO_CHANNEL_REPRESENTATION_INDEX:
|
|
return popcount(bits);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Returns the number of channels from an output channel mask,
|
|
* used in the context of audio output or playback.
|
|
* If a channel bit is set which could _not_ correspond to an output channel,
|
|
* it is excluded from the count.
|
|
* Returns zero if the representation is invalid.
|
|
*/
|
|
static inline uint32_t audio_channel_count_from_out_mask(audio_channel_mask_t channel)
|
|
{
|
|
uint32_t bits = audio_channel_mask_get_bits(channel);
|
|
switch (audio_channel_mask_get_representation(channel)) {
|
|
case AUDIO_CHANNEL_REPRESENTATION_POSITION:
|
|
// TODO: We can now merge with from_in_mask and remove anding
|
|
bits &= AUDIO_CHANNEL_OUT_ALL;
|
|
// fall through
|
|
case AUDIO_CHANNEL_REPRESENTATION_INDEX:
|
|
return popcount(bits);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Derive an output channel mask for position assignment 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 AUDIO_CHANNEL_NONE if the channel count is zero,
|
|
* or AUDIO_CHANNEL_INVALID if the channel count exceeds that of the
|
|
* configurations for which a default output channel mask is defined.
|
|
*/
|
|
static inline audio_channel_mask_t audio_channel_out_mask_from_count(uint32_t channel_count)
|
|
{
|
|
uint32_t bits;
|
|
switch (channel_count) {
|
|
case 0:
|
|
return AUDIO_CHANNEL_NONE;
|
|
case 1:
|
|
bits = AUDIO_CHANNEL_OUT_MONO;
|
|
break;
|
|
case 2:
|
|
bits = AUDIO_CHANNEL_OUT_STEREO;
|
|
break;
|
|
case 3:
|
|
bits = AUDIO_CHANNEL_OUT_STEREO | AUDIO_CHANNEL_OUT_FRONT_CENTER;
|
|
break;
|
|
case 4: // 4.0
|
|
bits = AUDIO_CHANNEL_OUT_QUAD;
|
|
break;
|
|
case 5: // 5.0
|
|
bits = AUDIO_CHANNEL_OUT_QUAD | AUDIO_CHANNEL_OUT_FRONT_CENTER;
|
|
break;
|
|
case 6: // 5.1
|
|
bits = AUDIO_CHANNEL_OUT_5POINT1;
|
|
break;
|
|
case 7: // 6.1
|
|
bits = AUDIO_CHANNEL_OUT_5POINT1 | AUDIO_CHANNEL_OUT_BACK_CENTER;
|
|
break;
|
|
case 8:
|
|
bits = AUDIO_CHANNEL_OUT_7POINT1;
|
|
break;
|
|
default:
|
|
return AUDIO_CHANNEL_INVALID;
|
|
}
|
|
return audio_channel_mask_from_representation_and_bits(
|
|
AUDIO_CHANNEL_REPRESENTATION_POSITION, bits);
|
|
}
|
|
|
|
/* Derive an input channel mask for position assignment from a channel count.
|
|
* Currently handles only mono and stereo.
|
|
* Returns the matching channel mask,
|
|
* or AUDIO_CHANNEL_NONE if the channel count is zero,
|
|
* or AUDIO_CHANNEL_INVALID if the channel count exceeds that of the
|
|
* configurations for which a default input channel mask is defined.
|
|
*/
|
|
static inline audio_channel_mask_t audio_channel_in_mask_from_count(uint32_t channel_count)
|
|
{
|
|
uint32_t bits;
|
|
switch (channel_count) {
|
|
case 0:
|
|
return AUDIO_CHANNEL_NONE;
|
|
case 1:
|
|
bits = AUDIO_CHANNEL_IN_MONO;
|
|
break;
|
|
case 2:
|
|
bits = AUDIO_CHANNEL_IN_STEREO;
|
|
break;
|
|
default:
|
|
return AUDIO_CHANNEL_INVALID;
|
|
}
|
|
return audio_channel_mask_from_representation_and_bits(
|
|
AUDIO_CHANNEL_REPRESENTATION_POSITION, bits);
|
|
}
|
|
|
|
/* Derive a channel mask for index assignment from a channel count.
|
|
* Returns the matching channel mask,
|
|
* or AUDIO_CHANNEL_NONE if the channel count is zero,
|
|
* or AUDIO_CHANNEL_INVALID if the channel count exceeds AUDIO_CHANNEL_COUNT_MAX.
|
|
*/
|
|
static inline audio_channel_mask_t audio_channel_mask_for_index_assignment_from_count(
|
|
uint32_t channel_count)
|
|
{
|
|
if (channel_count == 0) {
|
|
return AUDIO_CHANNEL_NONE;
|
|
}
|
|
if (channel_count > AUDIO_CHANNEL_COUNT_MAX) {
|
|
return AUDIO_CHANNEL_INVALID;
|
|
}
|
|
uint32_t bits = (1 << channel_count) - 1;
|
|
return audio_channel_mask_from_representation_and_bits(
|
|
AUDIO_CHANNEL_REPRESENTATION_INDEX, bits);
|
|
}
|
|
|
|
static inline bool audio_is_valid_format(audio_format_t format)
|
|
{
|
|
switch (format & AUDIO_FORMAT_MAIN_MASK) {
|
|
case AUDIO_FORMAT_PCM:
|
|
switch (format) {
|
|
case AUDIO_FORMAT_PCM_16_BIT:
|
|
case AUDIO_FORMAT_PCM_8_BIT:
|
|
case AUDIO_FORMAT_PCM_32_BIT:
|
|
case AUDIO_FORMAT_PCM_8_24_BIT:
|
|
case AUDIO_FORMAT_PCM_FLOAT:
|
|
case AUDIO_FORMAT_PCM_24_BIT_PACKED:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
/* not reached */
|
|
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:
|
|
case AUDIO_FORMAT_OPUS:
|
|
case AUDIO_FORMAT_AC3:
|
|
case AUDIO_FORMAT_E_AC3:
|
|
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_24_BIT_PACKED:
|
|
size = sizeof(uint8_t) * 3;
|
|
break;
|
|
case AUDIO_FORMAT_PCM_16_BIT:
|
|
size = sizeof(int16_t);
|
|
break;
|
|
case AUDIO_FORMAT_PCM_8_BIT:
|
|
size = sizeof(uint8_t);
|
|
break;
|
|
case AUDIO_FORMAT_PCM_FLOAT:
|
|
size = sizeof(float);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
/* converts device address to string sent to audio HAL via set_parameters */
|
|
static char *audio_device_address_to_parameter(audio_devices_t device, const char *address)
|
|
{
|
|
const size_t kSize = AUDIO_DEVICE_MAX_ADDRESS_LEN + sizeof("a2dp_sink_address=");
|
|
char param[kSize];
|
|
|
|
if (device & AUDIO_DEVICE_OUT_ALL_A2DP)
|
|
snprintf(param, kSize, "%s=%s", "a2dp_sink_address", address);
|
|
else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
|
|
snprintf(param, kSize, "%s=%s", "mix", address);
|
|
else
|
|
snprintf(param, kSize, "%s", address);
|
|
|
|
return strdup(param);
|
|
}
|
|
|
|
|
|
__END_DECLS
|
|
|
|
#endif // ANDROID_AUDIO_CORE_H
|