AudioTrack.h revision aea7ea06394bcb155972d82055d4ea59962e4051
189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project/* 289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * you may not use this file except in compliance with the License. 689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * You may obtain a copy of the License at 789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 1089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 1189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 1289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * See the License for the specific language governing permissions and 1489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * limitations under the License. 1589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 1689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 1789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project#ifndef ANDROID_AUDIOTRACK_H 1889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project#define ANDROID_AUDIOTRACK_H 1989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 20a636433cbd09c0708b85f337ef45c0cdef3bcb4dGlenn Kasten#include <cutils/sched_policy.h> 219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten#include <media/AudioSystem.h> 22ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten#include <media/AudioTimestamp.h> 239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten#include <media/IAudioTrack.h> 2489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project#include <utils/threads.h> 2589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 2689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectnamespace android { 2789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 2889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project// ---------------------------------------------------------------------------- 2989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 3089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectclass audio_track_cblk_t; 31e3aa659e9cee7df5c12a80d285cc29ab3b2cbb39Glenn Kastenclass AudioTrackClientProxy; 329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenclass StaticAudioTrackClientProxy; 3389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 3489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project// ---------------------------------------------------------------------------- 3589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenclass AudioTrack : public RefBase 3789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project{ 3889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectpublic: 3989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project enum channel_index { 4089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project MONO = 0, 4189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project LEFT = 0, 4289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project RIGHT = 1 4389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 4489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Events used by AudioTrack callback function (callback_t). 46ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten * Keep in sync with frameworks/base/media/java/android/media/AudioTrack.java NATIVE_EVENT_*. 4789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 4889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project enum event_type { 49083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten EVENT_MORE_DATA = 0, // Request to write more data to buffer. 50083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten // If this event is delivered but the callback handler 51083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten // does not want to write more data, the handler must explicitly 52083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten // ignore the event by setting frameCount to zero. 53083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten EVENT_UNDERRUN = 1, // Buffer underrun occurred. 5485ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten EVENT_LOOP_END = 2, // Sample loop end was reached; playback restarted from 5585ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten // loop start if loop count was not 0. 5685ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten EVENT_MARKER = 3, // Playback head is at the specified marker position 5785ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten // (See setMarkerPosition()). 5885ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten EVENT_NEW_POS = 4, // Playback head is at a new position 5985ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten // (See setPositionUpdatePeriod()). 609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten EVENT_BUFFER_END = 5, // Playback head is at the end of the buffer. 619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // Not currently used by android.media.AudioTrack. 629f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten EVENT_NEW_IAUDIOTRACK = 6, // IAudioTrack was re-created, either due to re-routing and 639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // voluntary invalidation by mediaserver, or mediaserver crash. 64ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald EVENT_STREAM_END = 7, // Sent after all the buffers queued in AF and HW are played 65ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald // back (after stop is called) 66ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten EVENT_NEW_TIMESTAMP = 8, // Delivered periodically and when there's a significant change 67ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten // in the mapping from frame position to presentation time. 68ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten // See AudioTimestamp for the information included with event. 6989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 7089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 7199e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten /* Client should declare Buffer on the stack and pass address to obtainBuffer() 7299e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * and releaseBuffer(). See also callback_t for EVENT_MORE_DATA. 7389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 7489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 7589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project class Buffer 7689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project { 7789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public: 789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // FIXME use m prefix 7999e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten size_t frameCount; // number of sample frames corresponding to size; 8099e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten // on input it is the number of frames desired, 8199e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten // on output is the number of frames actually filled 82fb1fdc9d6603aa228362e7349451f6455c9849c2Glenn Kasten // (currently ignored, but will make the primary field in future) 8399e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten 849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t size; // input/output in bytes == frameCount * frameSize 85fb1fdc9d6603aa228362e7349451f6455c9849c2Glenn Kasten // on output is the number of bytes actually filled 869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // FIXME this is redundant with respect to frameCount, 879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // and TRANSFER_OBTAIN mode is broken for 8-bit data 889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // since we don't define the frame format 899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 9089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project union { 9189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void* raw; 929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten short* i16; // signed 16-bit 939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int8_t* i8; // unsigned 8-bit, offset by 0x80 9489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 9589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 9689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 9789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* As a convenience, if a callback is supplied, a handler thread 9889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * is automatically created with the appropriate priority. This thread 9999e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * invokes the callback when a new buffer becomes available or various conditions occur. 10089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Parameters: 10189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 10289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * event: type of event notified (see enum AudioTrack::event_type). 10389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * user: Pointer to context for use by the callback receiver. 10489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * info: Pointer to optional parameter according to event type: 10589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - EVENT_MORE_DATA: pointer to AudioTrack::Buffer struct. The callback must not write 10699e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * more bytes than indicated by 'size' field and update 'size' if fewer bytes are 10799e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * written. 10889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - EVENT_UNDERRUN: unused. 10989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - EVENT_LOOP_END: pointer to an int indicating the number of loops remaining. 1109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * - EVENT_MARKER: pointer to const uint32_t containing the marker position in frames. 1119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * - EVENT_NEW_POS: pointer to const uint32_t containing the new position in frames. 11289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - EVENT_BUFFER_END: unused. 1139f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * - EVENT_NEW_IAUDIOTRACK: unused. 114ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * - EVENT_STREAM_END: unused. 115ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * - EVENT_NEW_TIMESTAMP: pointer to const AudioTimestamp. 11689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 11789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 118d217a8c4632b3e3065f8c2a26b9ce4dc4c97171fGlenn Kasten typedef void (*callback_t)(int event, void* user, void *info); 11989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 12033005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh /* Returns the minimum frame count required for the successful creation of 12133005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * an AudioTrack object. 12233005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * Returned status (from utils/Errors.h) can be: 12333005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * - NO_ERROR: successful operation 12433005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * - NO_INIT: audio server or audio hardware not initialized 1256ca126d5c83386941c5cb9600099e5510e4430d6Glenn Kasten * - BAD_VALUE: unsupported configuration 12633005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh */ 12733005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 1289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten static status_t getMinFrameCount(size_t* frameCount, 1299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_stream_type_t streamType, 1309f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t sampleRate); 1319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 1329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* How data is transferred to AudioTrack 1339f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten */ 1349f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten enum transfer_type { 1359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TRANSFER_DEFAULT, // not specified explicitly; determine from the other parameters 1369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TRANSFER_CALLBACK, // callback EVENT_MORE_DATA 1379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TRANSFER_OBTAIN, // FIXME deprecated: call obtainBuffer() and releaseBuffer() 1389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TRANSFER_SYNC, // synchronous write() 1399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TRANSFER_SHARED, // shared memory 1409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten }; 14133005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 14289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* Constructs an uninitialized AudioTrack. No connection with 143083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * AudioFlinger takes place. Use set() after this. 14489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 14589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project AudioTrack(); 14689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 147ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten /* Creates an AudioTrack object and registers it with AudioFlinger. 14889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Once created, the track needs to be started before it can be used. 149083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Unspecified values are set to appropriate default values. 150083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * With this constructor, the track is configured for streaming mode. 151083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Data to be rendered is supplied by write() or by the callback EVENT_MORE_DATA. 1529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Intermixing a combination of write() and non-ignored EVENT_MORE_DATA is not allowed. 15389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 15489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Parameters: 15589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 15689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * streamType: Select the type of audio stream this track is attached to 157fce7a473248381cc83a01855f92581077d3c9ee2Dima Zavin * (e.g. AUDIO_STREAM_MUSIC). 1589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * sampleRate: Data source sampling rate in Hz. 159fce7a473248381cc83a01855f92581077d3c9ee2Dima Zavin * format: Audio format (e.g AUDIO_FORMAT_PCM_16_BIT for signed 16089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 16 bits per sample). 16128b76b334f92a15a2be3cc9e2f7d229a3275d1acGlenn Kasten * channelMask: Channel mask. 162d8d6185c978c9b27ca69e7791785e0983ed9e8b8Eric Laurent * frameCount: Minimum size of track PCM buffer in frames. This defines the 163ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten * application's contribution to the 164d8d6185c978c9b27ca69e7791785e0983ed9e8b8Eric Laurent * latency of the track. The actual size selected by the AudioTrack could be 165d8d6185c978c9b27ca69e7791785e0983ed9e8b8Eric Laurent * larger if the requested size is not compatible with current audio HAL 166083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * configuration. Zero means to use a default value. 1670ca3cf94c0dfc173ad7886ae162c4b67067539f6Eric Laurent * flags: See comments on audio_output_flags_t in <system/audio.h>. 16889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * cbf: Callback function. If not null, this function is called periodically 169083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * to provide new data and inform of marker, position updates, etc. 170362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * user: Context for use by the callback receiver. 17189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * notificationFrames: The callback function is called each time notificationFrames PCM 172362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * frames have been consumed from track input buffer. 1739f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * This is expressed in units of frames at the initial source sample rate. 174362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * sessionId: Specific session ID, or zero to use default. 1759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * transferType: How data is transferred to AudioTrack. 1769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * threadCanCallJava: Not present in parameter list, and so is fixed at false. 17789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 17889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 179fff6d715a8db0daf08a50634f242c40268de3d49Glenn Kasten AudioTrack( audio_stream_type_t streamType, 180743732236ab84e94168378cdb293964861b1ed00Glenn Kasten uint32_t sampleRate, 181743732236ab84e94168378cdb293964861b1ed00Glenn Kasten audio_format_t format, 182743732236ab84e94168378cdb293964861b1ed00Glenn Kasten audio_channel_mask_t, 18389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int frameCount = 0, 1840ca3cf94c0dfc173ad7886ae162c4b67067539f6Eric Laurent audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE, 185a0d68338a88c2ddb4502f95017b546d603ef1ec7Glenn Kasten callback_t cbf = NULL, 186a0d68338a88c2ddb4502f95017b546d603ef1ec7Glenn Kasten void* user = NULL, 187be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent int notificationFrames = 0, 188aea7ea06394bcb155972d82055d4ea59962e4051Glenn Kasten int sessionId = AUDIO_SESSION_ALLOCATE, 189ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald transfer_type transferType = TRANSFER_DEFAULT, 190462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen const audio_offload_info_t *offloadInfo = NULL, 191462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen int uid = -1); 19289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 193083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten /* Creates an audio track and registers it with AudioFlinger. 194083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * With this constructor, the track is configured for static buffer mode. 195083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * The format must not be 8-bit linear PCM. 196083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Data to be rendered is passed in a shared memory buffer 197083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * identified by the argument sharedBuffer, which must be non-0. 198083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * The memory should be initialized to the desired data before calling start(). 1994bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten * The write() method is not supported in this case. 200362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * It is recommended to pass a callback function to be notified of playback end by an 20189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * EVENT_UNDERRUN event. 20289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 20389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 204fff6d715a8db0daf08a50634f242c40268de3d49Glenn Kasten AudioTrack( audio_stream_type_t streamType, 205743732236ab84e94168378cdb293964861b1ed00Glenn Kasten uint32_t sampleRate, 206743732236ab84e94168378cdb293964861b1ed00Glenn Kasten audio_format_t format, 207743732236ab84e94168378cdb293964861b1ed00Glenn Kasten audio_channel_mask_t channelMask, 208743732236ab84e94168378cdb293964861b1ed00Glenn Kasten const sp<IMemory>& sharedBuffer, 2090ca3cf94c0dfc173ad7886ae162c4b67067539f6Eric Laurent audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE, 210a0d68338a88c2ddb4502f95017b546d603ef1ec7Glenn Kasten callback_t cbf = NULL, 211a0d68338a88c2ddb4502f95017b546d603ef1ec7Glenn Kasten void* user = NULL, 212be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent int notificationFrames = 0, 213aea7ea06394bcb155972d82055d4ea59962e4051Glenn Kasten int sessionId = AUDIO_SESSION_ALLOCATE, 214ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald transfer_type transferType = TRANSFER_DEFAULT, 215462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen const audio_offload_info_t *offloadInfo = NULL, 216462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen int uid = -1); 21789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 21889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* Terminates the AudioTrack and unregisters it from AudioFlinger. 219362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * Also destroys all resources associated with the AudioTrack. 22089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 2212799d743ee2ae5a25fe869a7f9c052acc029559fGlenn Kastenprotected: 2222799d743ee2ae5a25fe869a7f9c052acc029559fGlenn Kasten virtual ~AudioTrack(); 2232799d743ee2ae5a25fe869a7f9c052acc029559fGlenn Kastenpublic: 22489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 2259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Initialize an AudioTrack that was created using the AudioTrack() constructor. 2269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Don't call set() more than once, or after the AudioTrack() constructors that take parameters. 22789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Returned status (from utils/Errors.h) can be: 228362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * - NO_ERROR: successful initialization 229362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * - INVALID_OPERATION: AudioTrack is already initialized 23028b76b334f92a15a2be3cc9e2f7d229a3275d1acGlenn Kasten * - BAD_VALUE: invalid parameter (channelMask, format, sampleRate...) 23189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - NO_INIT: audio server or audio hardware not initialized 23253cec22821072719ee02c856e9ac2dda2496c570Glenn Kasten * If status is not equal to NO_ERROR, don't call any other APIs on this AudioTrack. 233083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * If sharedBuffer is non-0, the frameCount parameter is ignored and 234083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * replaced by the shared buffer's total allocated size in frame units. 2359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * 2369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Parameters not listed in the AudioTrack constructors above: 2379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * 2389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * threadCanCallJava: Whether callbacks are made from an attached thread and thus can call JNI. 239ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten */ 240743732236ab84e94168378cdb293964861b1ed00Glenn Kasten status_t set(audio_stream_type_t streamType, 241743732236ab84e94168378cdb293964861b1ed00Glenn Kasten uint32_t sampleRate, 242743732236ab84e94168378cdb293964861b1ed00Glenn Kasten audio_format_t format, 243743732236ab84e94168378cdb293964861b1ed00Glenn Kasten audio_channel_mask_t channelMask, 24489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int frameCount = 0, 2450ca3cf94c0dfc173ad7886ae162c4b67067539f6Eric Laurent audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE, 246a0d68338a88c2ddb4502f95017b546d603ef1ec7Glenn Kasten callback_t cbf = NULL, 247a0d68338a88c2ddb4502f95017b546d603ef1ec7Glenn Kasten void* user = NULL, 24889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int notificationFrames = 0, 24989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project const sp<IMemory>& sharedBuffer = 0, 250be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent bool threadCanCallJava = false, 251aea7ea06394bcb155972d82055d4ea59962e4051Glenn Kasten int sessionId = AUDIO_SESSION_ALLOCATE, 252ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald transfer_type transferType = TRANSFER_DEFAULT, 253462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen const audio_offload_info_t *offloadInfo = NULL, 254462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen int uid = -1); 25589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 25653cec22821072719ee02c856e9ac2dda2496c570Glenn Kasten /* Result of constructing the AudioTrack. This must be checked for successful initialization 257362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * before using any AudioTrack API (except for set()), because using 25889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * an uninitialized AudioTrack produces undefined results. 25989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * See set() method above for possible return codes. 26089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 26101437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten status_t initCheck() const { return mStatus; } 26289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 263362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Returns this track's estimated latency in milliseconds. 26489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * This includes the latency due to AudioTrack buffer size, AudioMixer (if any) 26589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * and audio hardware driver. 26689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 267c9b2e20f7c9a71e07ef398152709c76079decbcdGlenn Kasten uint32_t latency() const { return mLatency; } 26889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 26999e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten /* getters, see constructors and set() */ 27089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 27101437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten audio_stream_type_t streamType() const { return mStreamType; } 27201437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten audio_format_t format() const { return mFormat; } 273b9980659501d0428d65d8292f3c32da69d37fbd2Glenn Kasten 2749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Return frame size in bytes, which for linear PCM is 2759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * channelCount * (bit depth per channel / 8). 276b9980659501d0428d65d8292f3c32da69d37fbd2Glenn Kasten * channelCount is determined from channelMask, and bit depth comes from format. 277083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * For non-linear formats, the frame size is typically 1 byte. 278b9980659501d0428d65d8292f3c32da69d37fbd2Glenn Kasten */ 2799f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t frameSize() const { return mFrameSize; } 280b9980659501d0428d65d8292f3c32da69d37fbd2Glenn Kasten 2819f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t channelCount() const { return mChannelCount; } 28201437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten uint32_t frameCount() const { return mFrameCount; } 28301437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten 284083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten /* Return the static buffer specified in constructor or set(), or 0 for streaming mode */ 28501437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten sp<IMemory> sharedBuffer() const { return mSharedBuffer; } 28689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 28789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* After it's created the track is not active. Call start() to 28889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * make it active. If set, the callback will start being called. 289083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * If the track was previously paused, volume is ramped up over the first mix buffer. 29089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 291b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status_t start(); 29289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 293083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten /* Stop a track. 294083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * In static buffer mode, the track is stopped immediately. 2959f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * In streaming mode, the callback will cease being called. Note that obtainBuffer() still 2969f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * works and will fill up buffers until the pool is exhausted, and then will return WOULD_BLOCK. 2979f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * In streaming mode the stop does not occur immediately: any data remaining in the buffer 298083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * is first drained, mixed, and output, and only then is the track marked as stopped. 29989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 30089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void stop(); 30189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project bool stopped() const; 30289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 3034bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten /* Flush a stopped or paused track. All previously buffered data is discarded immediately. 3044bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten * This has the effect of draining the buffers without mixing or output. 3054bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten * Flush is intended for streaming mode, for example before switching to non-contiguous content. 3064bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten * This function is a no-op if the track is not stopped or paused, or uses a static buffer. 30789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 30889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void flush(); 30989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 310083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten /* Pause a track. After pause, the callback will cease being called and 3119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * obtainBuffer returns WOULD_BLOCK. Note that obtainBuffer() still works 31289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * and will fill up buffers until the pool is exhausted. 313083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Volume is ramped down over the next mix buffer following the pause request, 314083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * and then the track is marked as paused. It can be resumed with ramp up by start(). 31589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 31689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void pause(); 31789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 318362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Set volume for this track, mostly used for games' sound effects 319362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * left and right volumes. Levels must be >= 0.0 and <= 1.0. 320b1c0993b215c5c3eebd1c6bafc22bba23d57a70bGlenn Kasten * This is the older API. New applications should use setVolume(float) when possible. 32189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 322be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent status_t setVolume(float left, float right); 323b1c0993b215c5c3eebd1c6bafc22bba23d57a70bGlenn Kasten 324b1c0993b215c5c3eebd1c6bafc22bba23d57a70bGlenn Kasten /* Set volume for all channels. This is the preferred API for new applications, 325b1c0993b215c5c3eebd1c6bafc22bba23d57a70bGlenn Kasten * especially for multi-channel content. 326b1c0993b215c5c3eebd1c6bafc22bba23d57a70bGlenn Kasten */ 327b1c0993b215c5c3eebd1c6bafc22bba23d57a70bGlenn Kasten status_t setVolume(float volume); 32889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 329362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Set the send level for this track. An auxiliary effect should be attached 330362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * to the track with attachEffect(). Level must be >= 0.0 and <= 1.0. 331be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent */ 3322beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent status_t setAuxEffectSendLevel(float level); 333a5224f319e2ba4b51ddb4287705ccf8d4b8ecc51Glenn Kasten void getAuxEffectSendLevel(float* level) const; 334be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 3359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Set source sample rate for this track in Hz, mostly used for games' sound effects 33689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 3373b16c766d1ae2cfd8487e8ffb2b23936fc0a8e17Glenn Kasten status_t setSampleRate(uint32_t sampleRate); 3383b16c766d1ae2cfd8487e8ffb2b23936fc0a8e17Glenn Kasten 3399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Return current source sample rate in Hz, or 0 if unknown */ 340a5224f319e2ba4b51ddb4287705ccf8d4b8ecc51Glenn Kasten uint32_t getSampleRate() const; 34189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 34289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* Enables looping and sets the start and end points of looping. 343083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Only supported for static buffer mode. 34489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 34589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Parameters: 34689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 3479c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * loopStart: loop start in frames relative to start of buffer. 3489c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * loopEnd: loop end in frames relative to start of buffer. 349362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * loopCount: number of loops to execute. Calling setLoop() with loopCount == 0 cancels any 3509c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * pending or active loop. loopCount == -1 means infinite looping. 35189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 35289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * For proper operation the following condition must be respected: 3539c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * loopCount != 0 implies 0 <= loopStart < loopEnd <= frameCount(). 3549c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * 3559c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * If the loop period (loopEnd - loopStart) is too small for the implementation to support, 3569f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * setLoop() will return BAD_VALUE. loopCount must be >= -1. 3579c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * 35889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 35989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project status_t setLoop(uint32_t loopStart, uint32_t loopEnd, int loopCount); 36089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 361362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Sets marker position. When playback reaches the number of frames specified, a callback with 362362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * event type EVENT_MARKER is called. Calling setMarkerPosition with marker == 0 cancels marker 363083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * notification callback. To set a marker at a position which would compute as 0, 3649f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * a workaround is to the set the marker at a nearby position such as ~0 or 1. 36585ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten * If the AudioTrack has been opened with no callback function associated, the operation will 36685ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten * fail. 36789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 36889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Parameters: 36989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 370083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * marker: marker position expressed in wrapping (overflow) frame units, 371083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * like the return value of getPosition(). 37289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 37389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Returned status (from utils/Errors.h) can be: 37489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - NO_ERROR: successful operation 37589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - INVALID_OPERATION: the AudioTrack has no callback installed. 37689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 37789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project status_t setMarkerPosition(uint32_t marker); 378a5224f319e2ba4b51ddb4287705ccf8d4b8ecc51Glenn Kasten status_t getMarkerPosition(uint32_t *marker) const; 37989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 380362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Sets position update period. Every time the number of frames specified has been played, 381362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * a callback with event type EVENT_NEW_POS is called. 382362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * Calling setPositionUpdatePeriod with updatePeriod == 0 cancels new position notification 383362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * callback. 38485ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten * If the AudioTrack has been opened with no callback function associated, the operation will 38585ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten * fail. 386083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Extremely small values may be rounded up to a value the implementation can support. 38789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 38889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Parameters: 38989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 39089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * updatePeriod: position update notification period expressed in frames. 39189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 39289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Returned status (from utils/Errors.h) can be: 39389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - NO_ERROR: successful operation 39489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - INVALID_OPERATION: the AudioTrack has no callback installed. 39589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 39689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project status_t setPositionUpdatePeriod(uint32_t updatePeriod); 397a5224f319e2ba4b51ddb4287705ccf8d4b8ecc51Glenn Kasten status_t getPositionUpdatePeriod(uint32_t *updatePeriod) const; 39889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 3999c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten /* Sets playback head position. 4009c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * Only supported for static buffer mode. 4019c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * 40289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Parameters: 40389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 4049c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * position: New playback head position in frames relative to start of buffer. 4059c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * 0 <= position <= frameCount(). Note that end of buffer is permitted, 4069c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * but will result in an immediate underrun if started. 40789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 40889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Returned status (from utils/Errors.h) can be: 40989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - NO_ERROR: successful operation 410083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * - INVALID_OPERATION: the AudioTrack is not stopped or paused, or is streaming mode. 41185ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten * - BAD_VALUE: The specified position is beyond the number of frames present in AudioTrack 41285ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten * buffer 41389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 41489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project status_t setPosition(uint32_t position); 415083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten 416083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten /* Return the total number of frames played since playback start. 417083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * The counter will wrap (overflow) periodically, e.g. every ~27 hours at 44.1 kHz. 418083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * It is reset to zero by flush(), reload(), and stop(). 4199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * 4209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Parameters: 4219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * 4229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * position: Address where to return play head position. 4239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * 4249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Returned status (from utils/Errors.h) can be: 4259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * - NO_ERROR: successful operation 4269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * - BAD_VALUE: position is NULL 427083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten */ 4289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status_t getPosition(uint32_t *position) const; 42989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 4309c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten /* For static buffer mode only, this returns the current playback position in frames 43102de89293b74ab1e9a77ce2367c5c499ab038968Glenn Kasten * relative to start of buffer. It is analogous to the position units used by 4329c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten * setLoop() and setPosition(). After underrun, the position will be at end of buffer. 4339c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten */ 4349c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten status_t getBufferPosition(uint32_t *position); 4359c6745f128648f6e0144b74ee593911a9fa10d51Glenn Kasten 436362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Forces AudioTrack buffer full condition. When playing a static buffer, this method avoids 43789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * rewriting the buffer before restarting playback after a stop. 43889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * This method must be called with the AudioTrack in paused or stopped state. 439083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * Not allowed in streaming mode. 44089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 44189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Returned status (from utils/Errors.h) can be: 44289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * - NO_ERROR: successful operation 443083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * - INVALID_OPERATION: the AudioTrack is not stopped or paused, or is streaming mode. 44489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 44589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project status_t reload(); 44689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 447362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Returns a handle on the audio output used by this AudioTrack. 448c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * 449c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * Parameters: 450c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * none. 451c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * 452c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * Returned value: 453c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * handle on audio hardware output 454c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent */ 455c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent audio_io_handle_t getOutput(); 456c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 457362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Returns the unique session ID associated with this track. 458be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * 459be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * Parameters: 460be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * none. 461be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * 462be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * Returned value: 463362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten * AudioTrack session ID. 464be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent */ 46501437b7cdaecf53acb46b50ff8b5d86b9d36eb20Glenn Kasten int getSessionId() const { return mSessionId; } 466be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 467362c4e697d8e9c034e964ac7b40227e054491547Glenn Kasten /* Attach track auxiliary output to specified effect. Use effectId = 0 468be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * to detach track from effect. 469be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * 470be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * Parameters: 471be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * 472be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * effectId: effectId obtained from AudioEffect::id(). 473be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * 474be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * Returned status (from utils/Errors.h) can be: 475be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * - NO_ERROR: successful operation 476be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * - INVALID_OPERATION: the effect is not an auxiliary effect. 477be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent * - BAD_VALUE: The specified effect ID is invalid 478be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent */ 479be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent status_t attachAuxEffect(int effectId); 480be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 4819f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Obtains a buffer of up to "audioBuffer->frameCount" empty slots for frames. 4829f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * After filling these slots with data, the caller should release them with releaseBuffer(). 4839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * If the track buffer is not full, obtainBuffer() returns as many contiguous 4849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * [empty slots for] frames as are available immediately. 4859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * If the track buffer is full and track is stopped, obtainBuffer() returns WOULD_BLOCK 4869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * regardless of the value of waitCount. 4879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * If the track buffer is full and track is not stopped, obtainBuffer() blocks with a 4889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * maximum timeout based on waitCount; see chart below. 489ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten * Buffers will be returned until the pool 49089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * is exhausted, at which point obtainBuffer() will either block 4919f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * or return WOULD_BLOCK depending on the value of the "waitCount" 49289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * parameter. 4939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Each sample is 16-bit signed PCM. 49499e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * 495083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * obtainBuffer() and releaseBuffer() are deprecated for direct use by applications, 496083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * which should use write() or callback EVENT_MORE_DATA instead. 497083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten * 49899e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * Interpretation of waitCount: 49999e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * +n limits wait time to n * WAIT_PERIOD_MS, 50099e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * -1 causes an (almost) infinite wait time, 50199e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * 0 non-blocking. 50205d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * 50305d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * Buffer fields 50405d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * On entry: 50505d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * frameCount number of frames requested 50605d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * After error return: 50705d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * frameCount 0 50805d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * size 0 50922eb4e239fbe9103568147d566d7482e480350b8Glenn Kasten * raw undefined 51005d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * After successful return: 51105d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * frameCount actual number of frames available, <= number requested 51205d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * size actual number of bytes available 51305d499958e4030938ed77a924ebdd9899f36752eGlenn Kasten * raw pointer to the buffer 51489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 51589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 5169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* FIXME Deprecated public API for TRANSFER_OBTAIN mode */ 5179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status_t obtainBuffer(Buffer* audioBuffer, int32_t waitCount) 5189f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten __attribute__((__deprecated__)); 51989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 5209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenprivate: 52102de89293b74ab1e9a77ce2367c5c499ab038968Glenn Kasten /* If nonContig is non-NULL, it is an output parameter that will be set to the number of 5229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * additional non-contiguous frames that are available immediately. 5239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * FIXME We could pass an array of Buffers instead of only one Buffer to obtainBuffer(), 5249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * in case the requested amount of frames is in two or more non-contiguous regions. 5259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * FIXME requested and elapsed are both relative times. Consider changing to absolute time. 5269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten */ 5279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status_t obtainBuffer(Buffer* audioBuffer, const struct timespec *requested, 5289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten struct timespec *elapsed = NULL, size_t *nonContig = NULL); 5299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenpublic: 53099e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten 531ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald//EL_FIXME to be reconciled with new obtainBuffer() return codes and control block proxy 532ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// enum { 533ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// NO_MORE_BUFFERS = 0x80000001, // same name in AudioFlinger.h, ok to be different value 534ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// TEAR_DOWN = 0x80000002, 535ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// STOPPED = 1, 536ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// STREAM_END_WAIT, 537ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// STREAM_END 538ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald// }; 539ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 5409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* Release a filled buffer of "audioBuffer->frameCount" frames for AudioFlinger to process. */ 5419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // FIXME make private when obtainBuffer() for TRANSFER_OBTAIN is removed 54289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void releaseBuffer(Buffer* audioBuffer); 54389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 54489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* As a convenience we provide a write() interface to the audio buffer. 5459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Input parameter 'size' is in byte units. 54699e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * This is implemented on top of obtainBuffer/releaseBuffer. For best 54799e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * performance use callbacks. Returns actual number of bytes written >= 0, 54899e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * or one of the following negative status codes: 54902de89293b74ab1e9a77ce2367c5c499ab038968Glenn Kasten * INVALID_OPERATION AudioTrack is configured for static buffer or streaming mode 55099e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * BAD_VALUE size is invalid 5519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * WOULD_BLOCK when obtainBuffer() returns same, or 5529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * AudioTrack was stopped during the write 55399e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten * or any other error code returned by IAudioTrack::start() or restoreTrack_l(). 55489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 55589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project ssize_t write(const void* buffer, size_t size); 55689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 55789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* 55889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Dumps the state of an audio track. 55989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 5609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status_t dump(int fd, const Vector<String16>& args) const; 5619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 5629f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten /* 5639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * Return the total number of frames which AudioFlinger desired but were unavailable, 5649f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten * and thus which resulted in an underrun. Reset to zero by stop(). 5659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten */ 5669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t getUnderrunFrames() const; 56789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 568ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald /* Get the flags */ 569ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald audio_output_flags_t getFlags() const { return mFlags; } 570ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 571ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald /* Set parameters - only possible when using direct output */ 572ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald status_t setParameters(const String8& keyValuePairs); 573ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 574ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald /* Get parameters */ 575ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald String8 getParameters(const String8& keys); 576ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 577ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten /* Poll for a timestamp on demand. 578ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * Use if EVENT_NEW_TIMESTAMP is not delivered often enough for your needs, 579ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * or if you need to get the most recent timestamp outside of the event callback handler. 580ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * Caution: calling this method too often may be inefficient; 581ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * if you need a high resolution mapping between frame position and presentation time, 582ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * consider implementing that at application level, based on the low resolution timestamps. 583ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten * Returns NO_ERROR if timestamp is valid. 584ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten */ 585ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten status_t getTimestamp(AudioTimestamp& timestamp); 586ce70374bf105f8a6160bf5dd70affea012b2a464Glenn Kasten 5874ff14bae91075eb274eb1c2975982358946e7e63John Grossmanprotected: 58889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* copying audio tracks is not allowed */ 58989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project AudioTrack(const AudioTrack& other); 59089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project AudioTrack& operator = (const AudioTrack& other); 59189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 59289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /* a small internal class to handle the callback */ 59389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project class AudioTrackThread : public Thread 59489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project { 59589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public: 59689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project AudioTrackThread(AudioTrack& receiver, bool bCanCallJava = false); 5973acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten 5983acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten // Do not call Thread::requestExitAndWait() without first calling requestExit(). 5993acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten // Thread::requestExitAndWait() is not virtual, and the implementation doesn't do enough. 6003acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten virtual void requestExit(); 6013acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten 6023acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten void pause(); // suspend thread from execution at next loop boundary 6033acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten void resume(); // allow thread to execute, if not requested to exit 6043acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten 60589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private: 6065a6cd224d07c05b496b6aca050ce5ecf96f125afGlenn Kasten void pauseInternal(nsecs_t ns = 0LL); 6075a6cd224d07c05b496b6aca050ce5ecf96f125afGlenn Kasten // like pause(), but only used internally within thread 6085a6cd224d07c05b496b6aca050ce5ecf96f125afGlenn Kasten 60989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project friend class AudioTrack; 61089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project virtual bool threadLoop(); 6119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten AudioTrack& mReceiver; 6129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten virtual ~AudioTrackThread(); 6133acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten Mutex mMyLock; // Thread::mLock is private 6143acbd053c842e76e1a40fc8a0bf62de87eebf00fGlenn Kasten Condition mMyCond; // Thread::mThreadExitedCondition is private 6155a6cd224d07c05b496b6aca050ce5ecf96f125afGlenn Kasten bool mPaused; // whether thread is requested to pause at next loop entry 6165a6cd224d07c05b496b6aca050ce5ecf96f125afGlenn Kasten bool mPausedInt; // whether thread internally requests pause 6175a6cd224d07c05b496b6aca050ce5ecf96f125afGlenn Kasten nsecs_t mPausedNs; // if mPausedInt then associated timeout, otherwise ignored 618598de6c701e989385eeffa7c5dfd61f0459a2631Glenn Kasten bool mIgnoreNextPausedInt; // whether to ignore next mPausedInt request 61989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 62089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 62199e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten // body of AudioTrackThread::threadLoop() 6229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // returns the maximum amount of time before we would like to run again, where: 6239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // 0 immediately 6249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // > 0 no later than this many nanoseconds from now 6259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // NS_WHENEVER still active but no particular deadline 6269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // NS_INACTIVE inactive so don't run again until re-started 6279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // NS_NEVER never again 6289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten static const nsecs_t NS_WHENEVER = -1, NS_INACTIVE = -2, NS_NEVER = -3; 6299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten nsecs_t processAudioBuffer(const sp<AudioTrackThread>& thread); 630ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald status_t processStreamEnd(int32_t waitCount); 631ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 632ea7939a079b3600cab955760839b021326f8cfc3Glenn Kasten 633d5ed6e88a9bea1879e41d7defaf1edea7c09f554Glenn Kasten // caller must hold lock on mLock for all _l methods 634ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 635fff6d715a8db0daf08a50634f242c40268de3d49Glenn Kasten status_t createTrack_l(audio_stream_type_t streamType, 63634f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent uint32_t sampleRate, 637e1c3962e268ffc12bfd1bd9ea84da1f135f36960Glenn Kasten audio_format_t format, 638e33054eb968cbf8ccaee1b0ff0301403902deed6Glenn Kasten size_t frameCount, 6390ca3cf94c0dfc173ad7886ae162c4b67067539f6Eric Laurent audio_output_flags_t flags, 64034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent const sp<IMemory>& sharedBuffer, 6419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_io_handle_t output, 6429f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t epoch); 6434bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten 6449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // can only be called when mState != STATE_ACTIVE 6451703cdfee717b1b312bf8979816a9e2f16a82e5dEric Laurent void flush_l(); 6464bae3649d504d590a546717a8e49f96a30d9a745Glenn Kasten 6479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten void setLoop_l(uint32_t loopStart, uint32_t loopEnd, int loopCount); 6481703cdfee717b1b312bf8979816a9e2f16a82e5dEric Laurent audio_io_handle_t getOutput_l(); 64989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 6509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // FIXME enum is faster than strcmp() for parameter 'from' 6519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status_t restoreTrack_l(const char *from); 6529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 653b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald bool isOffloaded() const 654b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald { return (mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0; } 655b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald 65653cec22821072719ee02c856e9ac2dda2496c570Glenn Kasten // Next 3 fields may be changed if IAudioTrack is re-created, but always != 0 65789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sp<IAudioTrack> mAudioTrack; 65889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sp<IMemory> mCblkMemory; 6599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* mCblk; // re-load after mLock.unlock() 66089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 6619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten sp<AudioTrackThread> mAudioTrackThread; 66289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project float mVolume[2]; 663be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent float mSendLevel; 6646f59db12a64f4496866952a251122ccb77a36c6bEric Laurent mutable uint32_t mSampleRate; // mutable because getSampleRate() can update it. 665b603744e96b07b1d5bf745bde593fb2c025cefcfGlenn Kasten size_t mFrameCount; // corresponds to current IAudioTrack 666b603744e96b07b1d5bf745bde593fb2c025cefcfGlenn Kasten size_t mReqFrameCount; // frame count to request the next time a new 667b603744e96b07b1d5bf745bde593fb2c025cefcfGlenn Kasten // IAudioTrack is needed 66889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 6699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // constant after constructor or set() 67060a839204713e0f8258d082af83262b1eb33a6c3Glenn Kasten audio_format_t mFormat; // as requested by client, not forced to 16-bit 671fff6d715a8db0daf08a50634f242c40268de3d49Glenn Kasten audio_stream_type_t mStreamType; 672e4756fe3a387615acb63c6a05788c8db9b5786cbGlenn Kasten uint32_t mChannelCount; 67328b76b334f92a15a2be3cc9e2f7d229a3275d1acGlenn Kasten audio_channel_mask_t mChannelMask; 6749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten transfer_type mTransfer; 67583a0382dc17364567667a4e6135db43f5bd92efcGlenn Kasten 6769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // mFrameSize is equal to mFrameSizeAF for non-PCM or 16-bit PCM data. For 8-bit PCM data, it's 6779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // twice as large as mFrameSize because data is expanded to 16-bit before it's stored in buffer. 67883a0382dc17364567667a4e6135db43f5bd92efcGlenn Kasten size_t mFrameSize; // app-level frame size 67983a0382dc17364567667a4e6135db43f5bd92efcGlenn Kasten size_t mFrameSizeAF; // AudioFlinger frame size 68083a0382dc17364567667a4e6135db43f5bd92efcGlenn Kasten 68189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project status_t mStatus; 68289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 6839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // can change dynamically when IAudioTrack invalidated 6849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t mLatency; // in ms 6859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 6869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // Indicates the current track state. Protected by mLock. 6879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten enum State { 6889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten STATE_ACTIVE, 6899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten STATE_STOPPED, 6909f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten STATE_PAUSED, 691b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald STATE_PAUSED_STOPPING, 6929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten STATE_FLUSHED, 693b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald STATE_STOPPING, 6949f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } mState; 69589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 6966ca126d5c83386941c5cb9600099e5510e4430d6Glenn Kasten // for client callback handler 69799e53b86eebb605b70dd7591b89bf61a9414ed0eGlenn Kasten callback_t mCbf; // callback handler for events, or NULL 6986ca126d5c83386941c5cb9600099e5510e4430d6Glenn Kasten void* mUserData; 699ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten 700ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten // for notification APIs 70185ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten uint32_t mNotificationFramesReq; // requested number of frames between each 7029f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // notification callback, 7039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // at initial source sample rate 70485ab62c4b433df3f1a9826bed1c9bec07a86c750Glenn Kasten uint32_t mNotificationFramesAct; // actual number of frames between each 7059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // notification callback, 7069f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // at initial source sample rate 7072fc14730e4697a6f456b4631549c9981f6b0b115Glenn Kasten bool mRefreshRemaining; // processAudioBuffer() should refresh 7082fc14730e4697a6f456b4631549c9981f6b0b115Glenn Kasten // mRemainingFrames and mRetryOnPartialBuffer 7099f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 7109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // These are private to processAudioBuffer(), and are not protected by a lock 7119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t mRemainingFrames; // number of frames to request in obtainBuffer() 7129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool mRetryOnPartialBuffer; // sleep and retry after partial obtainBuffer() 713b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald uint32_t mObservedSequence; // last observed value of mSequence 7149f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 71589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sp<IMemory> mSharedBuffer; 7169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t mLoopPeriod; // in frames, zero means looping is disabled 717083d1c1492d496960d5b28f4664ff02101736677Glenn Kasten uint32_t mMarkerPosition; // in wrapping (overflow) frame units 7182c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi bool mMarkerReached; 719ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten uint32_t mNewPosition; // in frames 7209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t mUpdatePeriod; // in frames, zero means no EVENT_NEW_POS 721ad2f6dbe14e601ae69f3697bc17106f9fd7d59d6Glenn Kasten 7220ca3cf94c0dfc173ad7886ae162c4b67067539f6Eric Laurent audio_output_flags_t mFlags; 723be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent int mSessionId; 7242beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent int mAuxEffectId; 725d5ed6e88a9bea1879e41d7defaf1edea7c09f554Glenn Kasten 7269a2aaf927e56a4b4acab23ef16b3f133a9f48a63Glenn Kasten mutable Mutex mLock; 727d5ed6e88a9bea1879e41d7defaf1edea7c09f554Glenn Kasten 7284ff14bae91075eb274eb1c2975982358946e7e63John Grossman bool mIsTimed; 729879135196fd1c97deefc538c888037c56c2879a7Glenn Kasten int mPreviousPriority; // before start() 730a636433cbd09c0708b85f337ef45c0cdef3bcb4dGlenn Kasten SchedPolicy mPreviousSchedulingGroup; 731a07f17ca46db04c9d5d9e7d6b2878db59ca2b9eaGlenn Kasten bool mAwaitBoost; // thread should wait for priority boost before running 7329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 7339f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // The proxy should only be referenced while a lock is held because the proxy isn't 7349f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // multi-thread safe, especially the SingleStateQueue part of the proxy. 7359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // An exception is that a blocking ClientProxy::obtainBuffer() may be called without a lock, 7369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // provided that the caller also holds an extra reference to the proxy and shared memory to keep 7379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // them around in case they are replaced during the obtainBuffer(). 7389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten sp<StaticAudioTrackClientProxy> mStaticProxy; // for type safety only 7399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten sp<AudioTrackClientProxy> mProxy; // primary owner of the memory 7409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 7419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool mInUnderrun; // whether track is currently in underrun state 742d054c32443a493513ab63529b0c8b1aca290278cGlenn Kasten String8 mName; // server's name for this IAudioTrack 7439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 7449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenprivate: 7459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten class DeathNotifier : public IBinder::DeathRecipient { 7469f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten public: 7479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten DeathNotifier(AudioTrack* audioTrack) : mAudioTrack(audioTrack) { } 7489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten protected: 7499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten virtual void binderDied(const wp<IBinder>& who); 7509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten private: 7519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten const wp<AudioTrack> mAudioTrack; 7529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten }; 7539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 7549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten sp<DeathNotifier> mDeathNotifier; 7559f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten uint32_t mSequence; // incremented for each new IAudioTrack attempt 756b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald audio_io_handle_t mOutput; // cached output io handle 757462fd2fa9eef642b0574aa7409de0bde3fec8d43Marco Nelissen int mClientUid; 75889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project}; 75989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 7604ff14bae91075eb274eb1c2975982358946e7e63John Grossmanclass TimedAudioTrack : public AudioTrack 7614ff14bae91075eb274eb1c2975982358946e7e63John Grossman{ 7624ff14bae91075eb274eb1c2975982358946e7e63John Grossmanpublic: 7634ff14bae91075eb274eb1c2975982358946e7e63John Grossman TimedAudioTrack(); 7644ff14bae91075eb274eb1c2975982358946e7e63John Grossman 7654ff14bae91075eb274eb1c2975982358946e7e63John Grossman /* allocate a shared memory buffer that can be passed to queueTimedBuffer */ 7664ff14bae91075eb274eb1c2975982358946e7e63John Grossman status_t allocateTimedBuffer(size_t size, sp<IMemory>* buffer); 7674ff14bae91075eb274eb1c2975982358946e7e63John Grossman 7684ff14bae91075eb274eb1c2975982358946e7e63John Grossman /* queue a buffer obtained via allocateTimedBuffer for playback at the 769c3ae93f21280859086ae371428ffd32f39e76d50Glenn Kasten given timestamp. PTS units are microseconds on the media time timeline. 7704ff14bae91075eb274eb1c2975982358946e7e63John Grossman The media time transform (set with setMediaTimeTransform) set by the 7714ff14bae91075eb274eb1c2975982358946e7e63John Grossman audio producer will handle converting from media time to local time 7724ff14bae91075eb274eb1c2975982358946e7e63John Grossman (perhaps going through the common time timeline in the case of 7734ff14bae91075eb274eb1c2975982358946e7e63John Grossman synchronized multiroom audio case) */ 7744ff14bae91075eb274eb1c2975982358946e7e63John Grossman status_t queueTimedBuffer(const sp<IMemory>& buffer, int64_t pts); 7754ff14bae91075eb274eb1c2975982358946e7e63John Grossman 7764ff14bae91075eb274eb1c2975982358946e7e63John Grossman /* define a transform between media time and either common time or 7774ff14bae91075eb274eb1c2975982358946e7e63John Grossman local time */ 7784ff14bae91075eb274eb1c2975982358946e7e63John Grossman enum TargetTimeline {LOCAL_TIME, COMMON_TIME}; 7794ff14bae91075eb274eb1c2975982358946e7e63John Grossman status_t setMediaTimeTransform(const LinearTransform& xform, 7804ff14bae91075eb274eb1c2975982358946e7e63John Grossman TargetTimeline target); 7814ff14bae91075eb274eb1c2975982358946e7e63John Grossman}; 78289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 78389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project}; // namespace android 78489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 78589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project#endif // ANDROID_AUDIOTRACK_H 786