AAudioServiceStreamMMAP.cpp revision 4c5129b410884ec0400cbe65fce56d0ade12d11b
1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "AAudioService" 18//#define LOG_NDEBUG 0 19#include <utils/Log.h> 20 21#include <atomic> 22#include <stdint.h> 23 24#include <utils/String16.h> 25#include <media/nbaio/AudioStreamOutSink.h> 26#include <media/MmapStreamInterface.h> 27 28#include "AAudioServiceStreamBase.h" 29#include "AAudioServiceStreamMMAP.h" 30#include "binding/AudioEndpointParcelable.h" 31#include "SharedMemoryProxy.h" 32#include "utility/AAudioUtilities.h" 33 34using namespace android; 35using namespace aaudio; 36 37#define AAUDIO_BUFFER_CAPACITY_MIN 4 * 512 38#define AAUDIO_SAMPLE_RATE_DEFAULT 48000 39 40/** 41 * Stream that uses an MMAP buffer. 42 */ 43 44AAudioServiceStreamMMAP::AAudioServiceStreamMMAP() 45 : AAudioServiceStreamBase() 46 , mMmapStreamCallback(new MyMmapStreamCallback(*this)) 47 , mPreviousFrameCounter(0) 48 , mMmapStream(nullptr) { 49} 50 51AAudioServiceStreamMMAP::~AAudioServiceStreamMMAP() { 52 close(); 53} 54 55aaudio_result_t AAudioServiceStreamMMAP::close() { 56 ALOGD("AAudioServiceStreamMMAP::close() called, %p", mMmapStream.get()); 57 mMmapStream.clear(); // TODO review. Is that all we have to do? 58 // Apparently the above close is asynchronous. An attempt to open a new device 59 // right after a close can fail. Also some callbacks may still be in flight! 60 // FIXME Make closing synchronous. 61 AudioClock::sleepForNanos(100 * AAUDIO_NANOS_PER_MILLISECOND); 62 63 return AAudioServiceStreamBase::close(); 64} 65 66// Open stream on HAL and pass information about the shared memory buffer back to the client. 67aaudio_result_t AAudioServiceStreamMMAP::open(const aaudio::AAudioStreamRequest &request, 68 aaudio::AAudioStreamConfiguration &configurationOutput) { 69 const audio_attributes_t attributes = { 70 .content_type = AUDIO_CONTENT_TYPE_MUSIC, 71 .usage = AUDIO_USAGE_MEDIA, 72 .source = AUDIO_SOURCE_DEFAULT, 73 .flags = AUDIO_FLAG_LOW_LATENCY, 74 .tags = "" 75 }; 76 audio_config_base_t config; 77 78 aaudio_result_t result = AAudioServiceStreamBase::open(request, configurationOutput); 79 if (result != AAUDIO_OK) { 80 ALOGE("AAudioServiceStreamBase open returned %d", result); 81 return result; 82 } 83 84 const AAudioStreamConfiguration &configurationInput = request.getConstantConfiguration(); 85 audio_port_handle_t deviceId = configurationInput.getDeviceId(); 86 87 // ALOGI("open request dump()"); 88 // request.dump(); 89 90 mMmapClient.clientUid = request.getUserId(); 91 mMmapClient.clientPid = request.getProcessId(); 92 aaudio_direction_t direction = request.getDirection(); 93 94 // Fill in config 95 aaudio_audio_format_t aaudioFormat = configurationInput.getAudioFormat(); 96 if (aaudioFormat == AAUDIO_UNSPECIFIED || aaudioFormat == AAUDIO_FORMAT_PCM_FLOAT) { 97 ALOGI("open forcing use of AAUDIO_FORMAT_PCM_I16"); 98 aaudioFormat = AAUDIO_FORMAT_PCM_I16; 99 } 100 config.format = AAudioConvert_aaudioToAndroidDataFormat(aaudioFormat); 101 102 int32_t aaudioSampleRate = configurationInput.getSampleRate(); 103 if (aaudioSampleRate == AAUDIO_UNSPECIFIED) { 104 aaudioSampleRate = AAUDIO_SAMPLE_RATE_DEFAULT; 105 } 106 config.sample_rate = aaudioSampleRate; 107 108 int32_t aaudioSamplesPerFrame = configurationInput.getSamplesPerFrame(); 109 110 if (direction == AAUDIO_DIRECTION_OUTPUT) { 111 config.channel_mask = (aaudioSamplesPerFrame == AAUDIO_UNSPECIFIED) 112 ? AUDIO_CHANNEL_OUT_STEREO 113 : audio_channel_out_mask_from_count(aaudioSamplesPerFrame); 114 } else if (direction == AAUDIO_DIRECTION_INPUT) { 115 config.channel_mask = (aaudioSamplesPerFrame == AAUDIO_UNSPECIFIED) 116 ? AUDIO_CHANNEL_IN_STEREO 117 : audio_channel_in_mask_from_count(aaudioSamplesPerFrame); 118 } else { 119 ALOGE("openMmapStream - invalid direction = %d", direction); 120 return AAUDIO_ERROR_ILLEGAL_ARGUMENT; 121 } 122 123 mMmapClient.packageName.setTo(String16("aaudio_service")); // FIXME what should we do here? 124 125 MmapStreamInterface::stream_direction_t streamDirection = (direction == AAUDIO_DIRECTION_OUTPUT) 126 ? MmapStreamInterface::DIRECTION_OUTPUT : MmapStreamInterface::DIRECTION_INPUT; 127 128 ALOGD("AAudioServiceStreamMMAP::open() request devId = %d, sRate = %d", 129 deviceId, config.sample_rate); 130 131 // Open HAL stream. 132 status_t status = MmapStreamInterface::openMmapStream(streamDirection, 133 &attributes, 134 &config, 135 mMmapClient, 136 &deviceId, 137 mMmapStreamCallback, 138 mMmapStream); 139 if (status != OK) { 140 ALOGE("openMmapStream returned status %d", status); 141 return AAUDIO_ERROR_UNAVAILABLE; 142 } 143 144 // Create MMAP/NOIRQ buffer. 145 int32_t minSizeFrames = configurationInput.getBufferCapacity(); 146 if (minSizeFrames == 0) { // zero will get rejected 147 minSizeFrames = AAUDIO_BUFFER_CAPACITY_MIN; 148 } 149 status = mMmapStream->createMmapBuffer(minSizeFrames, &mMmapBufferinfo); 150 if (status != OK) { 151 ALOGE("%s: createMmapBuffer() returned status %d, return AAUDIO_ERROR_UNAVAILABLE", 152 __FILE__, status); 153 return AAUDIO_ERROR_UNAVAILABLE; 154 } else { 155 ALOGD("createMmapBuffer status %d shared_address = %p buffer_size %d burst_size %d", 156 status, mMmapBufferinfo.shared_memory_address, 157 mMmapBufferinfo.buffer_size_frames, 158 mMmapBufferinfo.burst_size_frames); 159 } 160 161 // Get information about the stream and pass it back to the caller. 162 mSamplesPerFrame = (direction == AAUDIO_DIRECTION_OUTPUT) 163 ? audio_channel_count_from_out_mask(config.channel_mask) 164 : audio_channel_count_from_in_mask(config.channel_mask); 165 166 mAudioDataFileDescriptor = mMmapBufferinfo.shared_memory_fd; 167 mFramesPerBurst = mMmapBufferinfo.burst_size_frames; 168 mCapacityInFrames = mMmapBufferinfo.buffer_size_frames; 169 mAudioFormat = AAudioConvert_androidToAAudioDataFormat(config.format); 170 mSampleRate = config.sample_rate; 171 172 ALOGD("AAudioServiceStreamMMAP::open() got devId = %d, sRate = %d", 173 deviceId, config.sample_rate); 174 175 // Fill in AAudioStreamConfiguration 176 configurationOutput.setSampleRate(mSampleRate); 177 configurationOutput.setSamplesPerFrame(mSamplesPerFrame); 178 configurationOutput.setAudioFormat(mAudioFormat); 179 configurationOutput.setDeviceId(deviceId); 180 181 return AAUDIO_OK; 182} 183 184 185/** 186 * Start the flow of data. 187 */ 188aaudio_result_t AAudioServiceStreamMMAP::start() { 189 if (mMmapStream == nullptr) return AAUDIO_ERROR_NULL; 190 aaudio_result_t result = mMmapStream->start(mMmapClient, &mPortHandle); 191 if (result != AAUDIO_OK) { 192 ALOGE("AAudioServiceStreamMMAP::start() mMmapStream->start() returned %d", result); 193 processError(); 194 } else { 195 result = AAudioServiceStreamBase::start(); 196 } 197 return result; 198} 199 200/** 201 * Stop the flow of data such that start() can resume with loss of data. 202 */ 203aaudio_result_t AAudioServiceStreamMMAP::pause() { 204 if (mMmapStream == nullptr) return AAUDIO_ERROR_NULL; 205 206 aaudio_result_t result1 = AAudioServiceStreamBase::pause(); 207 aaudio_result_t result2 = mMmapStream->stop(mPortHandle); 208 mFramesRead.reset32(); 209 return (result1 != AAUDIO_OK) ? result1 : result2; 210} 211 212aaudio_result_t AAudioServiceStreamMMAP::stop() { 213 if (mMmapStream == nullptr) return AAUDIO_ERROR_NULL; 214 215 aaudio_result_t result1 = AAudioServiceStreamBase::stop(); 216 aaudio_result_t result2 = mMmapStream->stop(mPortHandle); 217 mFramesRead.reset32(); 218 return (result1 != AAUDIO_OK) ? result1 : result2; 219} 220 221/** 222 * Discard any data held by the underlying HAL or Service. 223 */ 224aaudio_result_t AAudioServiceStreamMMAP::flush() { 225 if (mMmapStream == nullptr) return AAUDIO_ERROR_NULL; 226 // TODO how do we flush an MMAP/NOIRQ buffer? sync pointers? 227 ALOGD("AAudioServiceStreamMMAP::flush() send AAUDIO_SERVICE_EVENT_FLUSHED"); 228 sendServiceEvent(AAUDIO_SERVICE_EVENT_FLUSHED); 229 mState = AAUDIO_STREAM_STATE_FLUSHED; 230 return AAudioServiceStreamBase::flush();; 231} 232 233 234aaudio_result_t AAudioServiceStreamMMAP::getFreeRunningPosition(int64_t *positionFrames, 235 int64_t *timeNanos) { 236 struct audio_mmap_position position; 237 if (mMmapStream == nullptr) { 238 processError(); 239 return AAUDIO_ERROR_NULL; 240 } 241 status_t status = mMmapStream->getMmapPosition(&position); 242 if (status != OK) { 243 ALOGE("sendCurrentTimestamp(): getMmapPosition() returned %d", status); 244 processError(); 245 return AAudioConvert_androidToAAudioResult(status); 246 } else { 247 mFramesRead.update32(position.position_frames); 248 *positionFrames = mFramesRead.get(); 249 *timeNanos = position.time_nanoseconds; 250 } 251 return AAUDIO_OK; 252} 253 254void AAudioServiceStreamMMAP::onTearDown() { 255 ALOGD("AAudioServiceStreamMMAP::onTearDown() called - TODO"); 256}; 257 258void AAudioServiceStreamMMAP::onVolumeChanged(audio_channel_mask_t channels, 259 android::Vector<float> values) { 260 // TODO do we really need a different volume for each channel? 261 float volume = values[0]; 262 ALOGD("AAudioServiceStreamMMAP::onVolumeChanged() volume[0] = %f", volume); 263 sendServiceEvent(AAUDIO_SERVICE_EVENT_VOLUME, volume); 264}; 265 266void AAudioServiceStreamMMAP::onRoutingChanged(audio_port_handle_t deviceId) { 267 ALOGD("AAudioServiceStreamMMAP::onRoutingChanged() called with %d, old = %d", 268 deviceId, mPortHandle); 269 if (mPortHandle > 0 && mPortHandle != deviceId) { 270 sendServiceEvent(AAUDIO_SERVICE_EVENT_DISCONNECTED); 271 } 272 mPortHandle = deviceId; 273}; 274 275/** 276 * Get an immutable description of the data queue from the HAL. 277 */ 278aaudio_result_t AAudioServiceStreamMMAP::getDownDataDescription(AudioEndpointParcelable &parcelable) 279{ 280 // Gather information on the data queue based on HAL info. 281 int32_t bytesPerFrame = calculateBytesPerFrame(); 282 int32_t capacityInBytes = mCapacityInFrames * bytesPerFrame; 283 int fdIndex = parcelable.addFileDescriptor(mAudioDataFileDescriptor, capacityInBytes); 284 parcelable.mDownDataQueueParcelable.setupMemory(fdIndex, 0, capacityInBytes); 285 parcelable.mDownDataQueueParcelable.setBytesPerFrame(bytesPerFrame); 286 parcelable.mDownDataQueueParcelable.setFramesPerBurst(mFramesPerBurst); 287 parcelable.mDownDataQueueParcelable.setCapacityInFrames(mCapacityInFrames); 288 return AAUDIO_OK; 289}