AudioSource.cpp revision eaae38445a340c4857c1c5569475879a728e63b7
1e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber/* 2e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * Copyright (C) 2010 The Android Open Source Project 3e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * 4e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 5e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * you may not use this file except in compliance with the License. 6e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * You may obtain a copy of the License at 7e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * 8e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * http://www.apache.org/licenses/LICENSE-2.0 9e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * 10e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * Unless required by applicable law or agreed to in writing, software 11e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 12e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * See the License for the specific language governing permissions and 14e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber * limitations under the License. 15e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber */ 16e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 17050b28a593350047845a45a14cc5026221ac1620James Dong//#define LOG_NDEBUG 0 18050b28a593350047845a45a14cc5026221ac1620James Dong#define LOG_TAG "AudioSource" 19050b28a593350047845a45a14cc5026221ac1620James Dong#include <utils/Log.h> 20050b28a593350047845a45a14cc5026221ac1620James Dong 21e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber#include <media/stagefright/AudioSource.h> 22e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 23e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber#include <media/AudioRecord.h> 24e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber#include <media/stagefright/MediaBufferGroup.h> 25e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber#include <media/stagefright/MediaDebug.h> 26e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber#include <media/stagefright/MediaDefs.h> 27e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber#include <media/stagefright/MetaData.h> 28365a963142093a1cd8efdcea76b5f65096a5b115James Dong#include <cutils/properties.h> 2946292fb347d72a314d985e34e5e3743d846cb9b6James Dong#include <stdlib.h> 30e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 31e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Hubernamespace android { 32e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 33e7c9cb48fec02697227bd847cd2e69432659adfdAndreas HuberAudioSource::AudioSource( 34e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber int inputSource, uint32_t sampleRate, uint32_t channels) 35be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong : mStarted(false), 36365a963142093a1cd8efdcea76b5f65096a5b115James Dong mCollectStats(false), 3746292fb347d72a314d985e34e5e3743d846cb9b6James Dong mPrevSampleTimeUs(0), 3847204e1806da9f849464d0cef936851d7e561607James Dong mTotalLostFrames(0), 3947204e1806da9f849464d0cef936851d7e561607James Dong mPrevLostBytes(0), 40e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mGroup(NULL) { 41be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong 42be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong LOGV("sampleRate: %d, channels: %d", sampleRate, channels); 43f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong CHECK(channels == 1 || channels == 2); 44be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong uint32_t flags = AudioRecord::RECORD_AGC_ENABLE | 45be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong AudioRecord::RECORD_NS_ENABLE | 46be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong AudioRecord::RECORD_IIR_ENABLE; 47be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong 48be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong mRecord = new AudioRecord( 49be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong inputSource, sampleRate, AudioSystem::PCM_16_BIT, 50be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong channels > 1? AudioSystem::CHANNEL_IN_STEREO: AudioSystem::CHANNEL_IN_MONO, 51be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong 4 * kMaxBufferSize / sizeof(int16_t), /* Enable ping-pong buffers */ 52be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong flags); 53be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong 54be6ec71af2d12e2a55f2f0b1b77d3fa5d593a1c7James Dong mInitCheck = mRecord->initCheck(); 55e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 56e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 57e7c9cb48fec02697227bd847cd2e69432659adfdAndreas HuberAudioSource::~AudioSource() { 58e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber if (mStarted) { 59e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber stop(); 60e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber } 61e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 62e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber delete mRecord; 63e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mRecord = NULL; 64e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 65e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 66e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huberstatus_t AudioSource::initCheck() const { 67e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return mInitCheck; 68e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 69e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 70e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huberstatus_t AudioSource::start(MetaData *params) { 71e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber if (mStarted) { 72e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return UNKNOWN_ERROR; 73e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber } 74e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 756e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong if (mInitCheck != OK) { 766e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong return NO_INIT; 776e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong } 786e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong 79365a963142093a1cd8efdcea76b5f65096a5b115James Dong char value[PROPERTY_VALUE_MAX]; 80365a963142093a1cd8efdcea76b5f65096a5b115James Dong if (property_get("media.stagefright.record-stats", value, NULL) 81365a963142093a1cd8efdcea76b5f65096a5b115James Dong && (!strcmp(value, "1") || !strcasecmp(value, "true"))) { 82365a963142093a1cd8efdcea76b5f65096a5b115James Dong mCollectStats = true; 83365a963142093a1cd8efdcea76b5f65096a5b115James Dong } 84f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong 85d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong mTrackMaxAmplitude = false; 86d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong mMaxAmplitude = 0; 87d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong mInitialReadTimeUs = 0; 88f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong mStartTimeUs = 0; 89f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong int64_t startTimeUs; 90f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong if (params && params->findInt64(kKeyTime, &startTimeUs)) { 91f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong mStartTimeUs = startTimeUs; 92f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong } 93e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber status_t err = mRecord->start(); 94e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber if (err == OK) { 95e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mGroup = new MediaBufferGroup; 96e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mGroup->add_buffer(new MediaBuffer(kMaxBufferSize)); 97e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 98e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mStarted = true; 99eaae38445a340c4857c1c5569475879a728e63b7James Dong } else { 100eaae38445a340c4857c1c5569475879a728e63b7James Dong delete mRecord; 101eaae38445a340c4857c1c5569475879a728e63b7James Dong mRecord = NULL; 102e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber } 103e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 104eaae38445a340c4857c1c5569475879a728e63b7James Dong 105e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return err; 106e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 107e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 108e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huberstatus_t AudioSource::stop() { 109e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber if (!mStarted) { 110e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return UNKNOWN_ERROR; 111e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber } 112e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 1136e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong if (mInitCheck != OK) { 1146e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong return NO_INIT; 1156e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong } 1166e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong 117e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mRecord->stop(); 118e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 119e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber delete mGroup; 120e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mGroup = NULL; 121e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 122e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber mStarted = false; 123e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 124365a963142093a1cd8efdcea76b5f65096a5b115James Dong if (mCollectStats) { 12547204e1806da9f849464d0cef936851d7e561607James Dong LOGI("Total lost audio frames: %lld", 12647204e1806da9f849464d0cef936851d7e561607James Dong mTotalLostFrames + (mPrevLostBytes >> 1)); 127365a963142093a1cd8efdcea76b5f65096a5b115James Dong } 128365a963142093a1cd8efdcea76b5f65096a5b115James Dong 129e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return OK; 130e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 131e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 132e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Hubersp<MetaData> AudioSource::getFormat() { 1336e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong if (mInitCheck != OK) { 1346e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong return 0; 1356e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong } 1366e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong 137e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber sp<MetaData> meta = new MetaData; 138e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW); 139e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber meta->setInt32(kKeySampleRate, mRecord->getSampleRate()); 140e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber meta->setInt32(kKeyChannelCount, mRecord->channelCount()); 141e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber meta->setInt32(kKeyMaxInputSize, kMaxBufferSize); 142e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 143e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return meta; 144e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 145e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 146f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dongvoid AudioSource::rampVolume( 147f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int32_t startFrame, int32_t rampDurationFrames, 148f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong uint8_t *data, size_t bytes) { 149f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong 150f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong const int32_t kShift = 14; 151f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int32_t fixedMultiplier = (startFrame << kShift) / rampDurationFrames; 152f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong const int32_t nChannels = mRecord->channelCount(); 153f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int32_t stopFrame = startFrame + bytes / sizeof(int16_t); 154f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int16_t *frame = (int16_t *) data; 155f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong if (stopFrame > rampDurationFrames) { 156f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong stopFrame = rampDurationFrames; 157f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } 158f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong 159f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong while (startFrame < stopFrame) { 160f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong if (nChannels == 1) { // mono 161f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong frame[0] = (frame[0] * fixedMultiplier) >> kShift; 162f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong ++frame; 163f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong ++startFrame; 164f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } else { // stereo 165f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong frame[0] = (frame[0] * fixedMultiplier) >> kShift; 166f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong frame[1] = (frame[1] * fixedMultiplier) >> kShift; 167f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong frame += 2; 168f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong startFrame += 2; 169f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } 170f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong 171f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong // Update the multiplier every 4 frames 172f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong if ((startFrame & 3) == 0) { 173f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong fixedMultiplier = (startFrame << kShift) / rampDurationFrames; 174f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } 175f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } 176f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong} 177f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong 178e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huberstatus_t AudioSource::read( 179e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber MediaBuffer **out, const ReadOptions *options) { 1806e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong 1816e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong if (mInitCheck != OK) { 1826e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong return NO_INIT; 1836e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong } 1846e20bdf799a6f4efa6c42121a958634ea32ed5ccJames Dong 185d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong int64_t readTimeUs = systemTime() / 1000; 186e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber *out = NULL; 187e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 188e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber MediaBuffer *buffer; 189e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber CHECK_EQ(mGroup->acquire_buffer(&buffer), OK); 190e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 19146292fb347d72a314d985e34e5e3743d846cb9b6James Dong int err = 0; 19279e23b41fad961008bfde6e26b3c6f86878ca69dJames Dong if (mStarted) { 19346292fb347d72a314d985e34e5e3743d846cb9b6James Dong 194542db5d438988360d491a5add1040a2df9aa90c9James Dong uint32_t numFramesRecorded; 195542db5d438988360d491a5add1040a2df9aa90c9James Dong mRecord->getPosition(&numFramesRecorded); 196542db5d438988360d491a5add1040a2df9aa90c9James Dong 197542db5d438988360d491a5add1040a2df9aa90c9James Dong 19846292fb347d72a314d985e34e5e3743d846cb9b6James Dong if (numFramesRecorded == 0 && mPrevSampleTimeUs == 0) { 199d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong mInitialReadTimeUs = readTimeUs; 200542db5d438988360d491a5add1040a2df9aa90c9James Dong // Initial delay 201542db5d438988360d491a5add1040a2df9aa90c9James Dong if (mStartTimeUs > 0) { 202d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong mStartTimeUs = readTimeUs - mStartTimeUs; 203542db5d438988360d491a5add1040a2df9aa90c9James Dong } else { 20446292fb347d72a314d985e34e5e3743d846cb9b6James Dong // Assume latency is constant. 20546292fb347d72a314d985e34e5e3743d846cb9b6James Dong mStartTimeUs += mRecord->latency() * 1000; 206542db5d438988360d491a5add1040a2df9aa90c9James Dong } 20746292fb347d72a314d985e34e5e3743d846cb9b6James Dong mPrevSampleTimeUs = mStartTimeUs; 208542db5d438988360d491a5add1040a2df9aa90c9James Dong } 209542db5d438988360d491a5add1040a2df9aa90c9James Dong 21046292fb347d72a314d985e34e5e3743d846cb9b6James Dong uint32_t sampleRate = mRecord->getSampleRate(); 21146292fb347d72a314d985e34e5e3743d846cb9b6James Dong 21246292fb347d72a314d985e34e5e3743d846cb9b6James Dong // Insert null frames when lost frames are detected. 21346292fb347d72a314d985e34e5e3743d846cb9b6James Dong int64_t timestampUs = mPrevSampleTimeUs; 21446292fb347d72a314d985e34e5e3743d846cb9b6James Dong uint32_t numLostBytes = mRecord->getInputFramesLost() << 1; 21547204e1806da9f849464d0cef936851d7e561607James Dong numLostBytes += mPrevLostBytes; 21646292fb347d72a314d985e34e5e3743d846cb9b6James Dong#if 0 21746292fb347d72a314d985e34e5e3743d846cb9b6James Dong // Simulate lost frames 21847204e1806da9f849464d0cef936851d7e561607James Dong numLostBytes = ((rand() * 1.0 / RAND_MAX)) * 2 * kMaxBufferSize; 21947204e1806da9f849464d0cef936851d7e561607James Dong numLostBytes &= 0xFFFFFFFE; // Alignment requirement 22046292fb347d72a314d985e34e5e3743d846cb9b6James Dong 22146292fb347d72a314d985e34e5e3743d846cb9b6James Dong // Reduce the chance to lose 22246292fb347d72a314d985e34e5e3743d846cb9b6James Dong if (rand() * 1.0 / RAND_MAX >= 0.05) { 22346292fb347d72a314d985e34e5e3743d846cb9b6James Dong numLostBytes = 0; 22446292fb347d72a314d985e34e5e3743d846cb9b6James Dong } 22546292fb347d72a314d985e34e5e3743d846cb9b6James Dong#endif 22646292fb347d72a314d985e34e5e3743d846cb9b6James Dong if (numLostBytes > 0) { 22747204e1806da9f849464d0cef936851d7e561607James Dong if (numLostBytes > kMaxBufferSize) { 22847204e1806da9f849464d0cef936851d7e561607James Dong mPrevLostBytes = numLostBytes - kMaxBufferSize; 22947204e1806da9f849464d0cef936851d7e561607James Dong numLostBytes = kMaxBufferSize; 23067e9269eaeab41a6c9a18794ebb32cbd1414381cJames Dong } else { 23167e9269eaeab41a6c9a18794ebb32cbd1414381cJames Dong mPrevLostBytes = 0; 23247204e1806da9f849464d0cef936851d7e561607James Dong } 23347204e1806da9f849464d0cef936851d7e561607James Dong 23447204e1806da9f849464d0cef936851d7e561607James Dong CHECK_EQ(numLostBytes & 1, 0); 23547204e1806da9f849464d0cef936851d7e561607James Dong timestampUs += ((1000000LL * (numLostBytes >> 1)) + 23647204e1806da9f849464d0cef936851d7e561607James Dong (sampleRate >> 1)) / sampleRate; 23746292fb347d72a314d985e34e5e3743d846cb9b6James Dong 23846292fb347d72a314d985e34e5e3743d846cb9b6James Dong CHECK(timestampUs > mPrevSampleTimeUs); 23946292fb347d72a314d985e34e5e3743d846cb9b6James Dong if (mCollectStats) { 24047204e1806da9f849464d0cef936851d7e561607James Dong mTotalLostFrames += (numLostBytes >> 1); 24146292fb347d72a314d985e34e5e3743d846cb9b6James Dong } 24246292fb347d72a314d985e34e5e3743d846cb9b6James Dong memset(buffer->data(), 0, numLostBytes); 24346292fb347d72a314d985e34e5e3743d846cb9b6James Dong buffer->set_range(0, numLostBytes); 244d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong if (numFramesRecorded == 0) { 24567e9269eaeab41a6c9a18794ebb32cbd1414381cJames Dong buffer->meta_data()->setInt64(kKeyAnchorTime, mStartTimeUs); 246d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong } 24767e9269eaeab41a6c9a18794ebb32cbd1414381cJames Dong buffer->meta_data()->setInt64(kKeyTime, mStartTimeUs + mPrevSampleTimeUs); 248d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong buffer->meta_data()->setInt64(kKeyDriftTime, readTimeUs - mInitialReadTimeUs); 24946292fb347d72a314d985e34e5e3743d846cb9b6James Dong mPrevSampleTimeUs = timestampUs; 25046292fb347d72a314d985e34e5e3743d846cb9b6James Dong *out = buffer; 25146292fb347d72a314d985e34e5e3743d846cb9b6James Dong return OK; 252f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong } 253e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 25446292fb347d72a314d985e34e5e3743d846cb9b6James Dong ssize_t n = mRecord->read(buffer->data(), buffer->size()); 255542db5d438988360d491a5add1040a2df9aa90c9James Dong if (n < 0) { 256542db5d438988360d491a5add1040a2df9aa90c9James Dong buffer->release(); 257542db5d438988360d491a5add1040a2df9aa90c9James Dong return (status_t)n; 258365a963142093a1cd8efdcea76b5f65096a5b115James Dong } 259e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 26046292fb347d72a314d985e34e5e3743d846cb9b6James Dong int64_t recordDurationUs = (1000000LL * n >> 1) / sampleRate; 26146292fb347d72a314d985e34e5e3743d846cb9b6James Dong timestampUs += recordDurationUs; 262e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 263f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong if (mPrevSampleTimeUs - mStartTimeUs < kAutoRampStartUs) { 264f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong // Mute the initial video recording signal 265f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong memset((uint8_t *) buffer->data(), 0, n); 266f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } else if (mPrevSampleTimeUs - mStartTimeUs < kAutoRampStartUs + kAutoRampDurationUs) { 267f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int32_t autoRampDurationFrames = 268f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong (kAutoRampDurationUs * sampleRate + 500000LL) / 1000000LL; 269f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong 270f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int32_t autoRampStartFrames = 271f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong (kAutoRampStartUs * sampleRate + 500000LL) / 1000000LL; 272f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong 273f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong int32_t nFrames = numFramesRecorded - autoRampStartFrames; 274f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong rampVolume(nFrames, autoRampDurationFrames, (uint8_t *) buffer->data(), n); 275f1ae1963f5028a670573b50a9c1cfb504fc426b4James Dong } 276542db5d438988360d491a5add1040a2df9aa90c9James Dong if (mTrackMaxAmplitude) { 277542db5d438988360d491a5add1040a2df9aa90c9James Dong trackMaxAmplitude((int16_t *) buffer->data(), n >> 1); 278542db5d438988360d491a5add1040a2df9aa90c9James Dong } 279d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong 280d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong if (numFramesRecorded == 0) { 2813c3763d2ee1cd1fba7fe522fbaf0faca315d8c2aJames Dong buffer->meta_data()->setInt64(kKeyAnchorTime, mStartTimeUs); 282d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong } 2833c3763d2ee1cd1fba7fe522fbaf0faca315d8c2aJames Dong 2843c3763d2ee1cd1fba7fe522fbaf0faca315d8c2aJames Dong buffer->meta_data()->setInt64(kKeyTime, mStartTimeUs + mPrevSampleTimeUs); 285d707fcb3e29707ca4a5935c294ef0b38eb5aba5fJames Dong buffer->meta_data()->setInt64(kKeyDriftTime, readTimeUs - mInitialReadTimeUs); 28646292fb347d72a314d985e34e5e3743d846cb9b6James Dong CHECK(timestampUs > mPrevSampleTimeUs); 28746292fb347d72a314d985e34e5e3743d846cb9b6James Dong mPrevSampleTimeUs = timestampUs; 288542db5d438988360d491a5add1040a2df9aa90c9James Dong LOGV("initial delay: %lld, sample rate: %d, timestamp: %lld", 289542db5d438988360d491a5add1040a2df9aa90c9James Dong mStartTimeUs, sampleRate, timestampUs); 290f60cafe0e6aad8f9ce54660fa88b651ae4e749e6James Dong 291542db5d438988360d491a5add1040a2df9aa90c9James Dong buffer->set_range(0, n); 292e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 293542db5d438988360d491a5add1040a2df9aa90c9James Dong *out = buffer; 294542db5d438988360d491a5add1040a2df9aa90c9James Dong return OK; 295542db5d438988360d491a5add1040a2df9aa90c9James Dong } 296e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 297e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber return OK; 298e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} 299e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber 300d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dongvoid AudioSource::trackMaxAmplitude(int16_t *data, int nSamples) { 301d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong for (int i = nSamples; i > 0; --i) { 302d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong int16_t value = *data++; 303d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong if (value < 0) { 304d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong value = -value; 305d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong } 306d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong if (mMaxAmplitude < value) { 307d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong mMaxAmplitude = value; 308d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong } 309d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong } 310d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong} 311d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong 312d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dongint16_t AudioSource::getMaxAmplitude() { 313d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong // First call activates the tracking. 314d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong if (!mTrackMaxAmplitude) { 315d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong mTrackMaxAmplitude = true; 316d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong } 317d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong int16_t value = mMaxAmplitude; 318d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong mMaxAmplitude = 0; 319d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong LOGV("max amplitude since last call: %d", value); 320d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong return value; 321d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong} 322d3d4e5069e1af0437c4f5a7b4ba344bda5b937afJames Dong 323e7c9cb48fec02697227bd847cd2e69432659adfdAndreas Huber} // namespace android 324