WAVExtractor.cpp revision b2487f03f12dcafdb801fc0007c8df8412397f44
10dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber/* 20dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * Copyright (C) 2009 The Android Open Source Project 30dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * 40dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 50dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * you may not use this file except in compliance with the License. 60dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * You may obtain a copy of the License at 70dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * 80dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 90dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * 100dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * Unless required by applicable law or agreed to in writing, software 110dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 120dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 130dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * See the License for the specific language governing permissions and 140dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber * limitations under the License. 150dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber */ 160dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 170dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber//#define LOG_NDEBUG 0 180dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#define LOG_TAG "WAVExtractor" 190dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <utils/Log.h> 200dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 210dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include "include/WAVExtractor.h" 220dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 23f1d5aa162c02a16b7195a43a9bcea4d592600ac4James Dong#include <media/stagefright/foundation/ADebug.h> 240dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <media/stagefright/DataSource.h> 250dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <media/stagefright/MediaBufferGroup.h> 260dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <media/stagefright/MediaDefs.h> 270dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <media/stagefright/MediaErrors.h> 280dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <media/stagefright/MediaSource.h> 290dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <media/stagefright/MetaData.h> 300dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber#include <utils/String8.h> 313bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi#include <cutils/bitops.h> 323bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 333bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi#define CHANNEL_MASK_USE_CHANNEL_ORDER 0 340dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 350dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Hubernamespace android { 360dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huberenum { 383bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi WAVE_FORMAT_PCM = 0x0001, 393bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi WAVE_FORMAT_ALAW = 0x0006, 403bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi WAVE_FORMAT_MULAW = 0x0007, 41ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen WAVE_FORMAT_MSGSM = 0x0031, 423bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi WAVE_FORMAT_EXTENSIBLE = 0xFFFE 4342d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber}; 440dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 453bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivistatic const char* WAVEEXT_SUBFORMAT = "\x00\x00\x00\x00\x10\x00\x80\x00\x00\xAA\x00\x38\x9B\x71"; 463bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 473bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 480dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberstatic uint32_t U32_LE_AT(const uint8_t *ptr) { 490dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return ptr[3] << 24 | ptr[2] << 16 | ptr[1] << 8 | ptr[0]; 500dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 510dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 520dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberstatic uint16_t U16_LE_AT(const uint8_t *ptr) { 530dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return ptr[1] << 8 | ptr[0]; 540dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 550dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 560dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberstruct WAVSource : public MediaSource { 570dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber WAVSource( 580dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber const sp<DataSource> &dataSource, 59f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber const sp<MetaData> &meta, 6042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber uint16_t waveFormat, 61f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber int32_t bitsPerSample, 62c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t offset, size_t size); 630dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 640dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber virtual status_t start(MetaData *params = NULL); 650dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber virtual status_t stop(); 660dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber virtual sp<MetaData> getFormat(); 670dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 680dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber virtual status_t read( 690dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber MediaBuffer **buffer, const ReadOptions *options = NULL); 700dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 710dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberprotected: 720dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber virtual ~WAVSource(); 730dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 740dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberprivate: 750dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber static const size_t kMaxFrameSize; 760dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 770dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber sp<DataSource> mDataSource; 78f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber sp<MetaData> mMeta; 7942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber uint16_t mWaveFormat; 800dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber int32_t mSampleRate; 810dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber int32_t mNumChannels; 82f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber int32_t mBitsPerSample; 83c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t mOffset; 840dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber size_t mSize; 850dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber bool mStarted; 860dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber MediaBufferGroup *mGroup; 87c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t mCurrentPos; 880dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 890dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber WAVSource(const WAVSource &); 900dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber WAVSource &operator=(const WAVSource &); 910dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber}; 920dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 930dba73763a04d39faf999dcc5ef12af3c99535a7Andreas HuberWAVExtractor::WAVExtractor(const sp<DataSource> &source) 940dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber : mDataSource(source), 953bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi mValidFormat(false), 963bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi mChannelMask(CHANNEL_MASK_USE_CHANNEL_ORDER) { 970dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mInitCheck = init(); 980dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 990dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1000dba73763a04d39faf999dcc5ef12af3c99535a7Andreas HuberWAVExtractor::~WAVExtractor() { 1010dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 1020dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1037be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Hubersp<MetaData> WAVExtractor::getMetaData() { 1047be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber sp<MetaData> meta = new MetaData; 1057be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber 1067be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber if (mInitCheck != OK) { 1077be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber return meta; 1087be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber } 1097be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber 11006096f955d486e229e19956052925f43f2f3f7c4Dongwon Kang meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_WAV); 1117be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber 1127be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber return meta; 1137be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber} 1147be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber 1150dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Hubersize_t WAVExtractor::countTracks() { 1160dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return mInitCheck == OK ? 1 : 0; 1170dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 1180dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 119b2487f03f12dcafdb801fc0007c8df8412397f44Marco Nelissensp<IMediaSource> WAVExtractor::getTrack(size_t index) { 1200dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (mInitCheck != OK || index > 0) { 1210dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NULL; 1220dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1230dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1240dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return new WAVSource( 125f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mDataSource, mTrackMeta, 12642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber mWaveFormat, mBitsPerSample, mDataOffset, mDataSize); 1270dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 1280dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1290dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Hubersp<MetaData> WAVExtractor::getTrackMetaData( 13084333e0475bc911adc16417f4ca327c975cf6c36Andreas Huber size_t index, uint32_t /* flags */) { 1310dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (mInitCheck != OK || index > 0) { 1320dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NULL; 1330dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1340dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 135f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber return mTrackMeta; 1360dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 1370dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1380dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberstatus_t WAVExtractor::init() { 1390dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber uint8_t header[12]; 1400dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (mDataSource->readAt( 1410dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 0, header, sizeof(header)) < (ssize_t)sizeof(header)) { 1420dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 1430dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1440dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1450dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (memcmp(header, "RIFF", 4) || memcmp(&header[8], "WAVE", 4)) { 1460dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 1470dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1480dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1490dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber size_t totalSize = U32_LE_AT(&header[4]); 1500dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 151c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t offset = 12; 1520dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber size_t remainingSize = totalSize; 1530dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber while (remainingSize >= 8) { 1540dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber uint8_t chunkHeader[8]; 1550dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (mDataSource->readAt(offset, chunkHeader, 8) < 8) { 1560dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 1570dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1580dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1590dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber remainingSize -= 8; 1600dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber offset += 8; 161f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 1620dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber uint32_t chunkSize = U32_LE_AT(&chunkHeader[4]); 1630dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1640dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (chunkSize > remainingSize) { 1650dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 1660dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1670dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1680dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (!memcmp(chunkHeader, "fmt ", 4)) { 1690dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (chunkSize < 16) { 1700dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 1710dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1720dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1733bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi uint8_t formatSpec[40]; 1743bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mDataSource->readAt(offset, formatSpec, 2) < 2) { 1750dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 1760dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1770dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 17842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber mWaveFormat = U16_LE_AT(formatSpec); 17942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber if (mWaveFormat != WAVE_FORMAT_PCM 18042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber && mWaveFormat != WAVE_FORMAT_ALAW 1813bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi && mWaveFormat != WAVE_FORMAT_MULAW 182ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen && mWaveFormat != WAVE_FORMAT_MSGSM 1833bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi && mWaveFormat != WAVE_FORMAT_EXTENSIBLE) { 1840dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return ERROR_UNSUPPORTED; 1850dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 1860dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 1873bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi uint8_t fmtSize = 16; 1883bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mWaveFormat == WAVE_FORMAT_EXTENSIBLE) { 1893bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi fmtSize = 40; 1903bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 1913bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mDataSource->readAt(offset, formatSpec, fmtSize) < fmtSize) { 1923bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi return NO_INIT; 1933bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 1943bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 1950dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mNumChannels = U16_LE_AT(&formatSpec[2]); 1963bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mWaveFormat != WAVE_FORMAT_EXTENSIBLE) { 1973bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mNumChannels != 1 && mNumChannels != 2) { 1983bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi ALOGW("More than 2 channels (%d) in non-WAVE_EXT, unknown channel mask", 1993bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi mNumChannels); 2003bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2013bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } else { 20218b7186ce7bc2df1f4f33b57fc323bf68feb2852Robert Shih if (mNumChannels < 1 || mNumChannels > 8) { 2033bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi return ERROR_UNSUPPORTED; 2043bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2050dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 2060dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 2070dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mSampleRate = U32_LE_AT(&formatSpec[4]); 2080dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 209f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber if (mSampleRate == 0) { 210f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber return ERROR_MALFORMED; 211f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber } 212f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 213f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mBitsPerSample = U16_LE_AT(&formatSpec[14]); 214f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 2153bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mWaveFormat == WAVE_FORMAT_PCM 2163bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi || mWaveFormat == WAVE_FORMAT_EXTENSIBLE) { 21742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber if (mBitsPerSample != 8 && mBitsPerSample != 16 21842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber && mBitsPerSample != 24) { 21942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber return ERROR_UNSUPPORTED; 22042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } 221ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } else if (mWaveFormat == WAVE_FORMAT_MSGSM) { 222ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen if (mBitsPerSample != 0) { 223ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen return ERROR_UNSUPPORTED; 224ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } 22542d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } else { 22642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber CHECK(mWaveFormat == WAVE_FORMAT_MULAW 22742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber || mWaveFormat == WAVE_FORMAT_ALAW); 22842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber if (mBitsPerSample != 8) { 22942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber return ERROR_UNSUPPORTED; 23042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } 2310dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 2320dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 2333bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mWaveFormat == WAVE_FORMAT_EXTENSIBLE) { 2343bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi uint16_t validBitsPerSample = U16_LE_AT(&formatSpec[18]); 2353bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (validBitsPerSample != mBitsPerSample) { 23606f6ae34c735640dccdaca6ab1567d8afc9d3938Jean-Michel Trivi if (validBitsPerSample != 0) { 23772b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi ALOGE("validBits(%d) != bitsPerSample(%d) are not supported", 23872b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi validBitsPerSample, mBitsPerSample); 23972b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi return ERROR_UNSUPPORTED; 24072b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi } else { 24172b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi // we only support valitBitsPerSample == bitsPerSample but some WAV_EXT 24272b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi // writers don't correctly set the valid bits value, and leave it at 0. 24372b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi ALOGW("WAVE_EXT has 0 valid bits per sample, ignoring"); 24472b2b9ba68ee85a3054a0de3a8414b8dfb217aebJean-Michel Trivi } 2453bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2463bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 2473bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi mChannelMask = U32_LE_AT(&formatSpec[20]); 2483bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi ALOGV("numChannels=%d channelMask=0x%x", mNumChannels, mChannelMask); 2493bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if ((mChannelMask >> 18) != 0) { 2503bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi ALOGE("invalid channel mask 0x%x", mChannelMask); 2513bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi return ERROR_MALFORMED; 2523bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2533bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 2543bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if ((mChannelMask != CHANNEL_MASK_USE_CHANNEL_ORDER) 2553bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi && (popcount(mChannelMask) != mNumChannels)) { 2563bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi ALOGE("invalid number of channels (%d) in channel mask (0x%x)", 2573bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi popcount(mChannelMask), mChannelMask); 2583bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi return ERROR_MALFORMED; 2593bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2603bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 2613bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi // In a WAVE_EXT header, the first two bytes of the GUID stored at byte 24 contain 2623bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi // the sample format, using the same definitions as a regular WAV header 2633bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi mWaveFormat = U16_LE_AT(&formatSpec[24]); 2643bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (mWaveFormat != WAVE_FORMAT_PCM 2653bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi && mWaveFormat != WAVE_FORMAT_ALAW 2663bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi && mWaveFormat != WAVE_FORMAT_MULAW) { 2673bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi return ERROR_UNSUPPORTED; 2683bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2693bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi if (memcmp(&formatSpec[26], WAVEEXT_SUBFORMAT, 14)) { 2703bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi ALOGE("unsupported GUID"); 2713bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi return ERROR_UNSUPPORTED; 2723bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2733bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi } 2743bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi 2750dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mValidFormat = true; 2760dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } else if (!memcmp(chunkHeader, "data", 4)) { 2770dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (mValidFormat) { 2780dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mDataOffset = offset; 2790dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mDataSize = chunkSize; 2800dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 281f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mTrackMeta = new MetaData; 28242d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber 28342d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber switch (mWaveFormat) { 28442d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber case WAVE_FORMAT_PCM: 28542d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber mTrackMeta->setCString( 28642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW); 28742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber break; 28842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber case WAVE_FORMAT_ALAW: 28942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber mTrackMeta->setCString( 29042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_G711_ALAW); 29142d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber break; 292ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen case WAVE_FORMAT_MSGSM: 293ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen mTrackMeta->setCString( 294ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MSGSM); 295ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen break; 29642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber default: 297f1d5aa162c02a16b7195a43a9bcea4d592600ac4James Dong CHECK_EQ(mWaveFormat, (uint16_t)WAVE_FORMAT_MULAW); 29842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber mTrackMeta->setCString( 29942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_G711_MLAW); 30042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber break; 30142d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } 30242d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber 303f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mTrackMeta->setInt32(kKeyChannelCount, mNumChannels); 3043bed68cb3d43af40475f56211869c40470c1fb4dJean-Michel Trivi mTrackMeta->setInt32(kKeyChannelMask, mChannelMask); 305f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mTrackMeta->setInt32(kKeySampleRate, mSampleRate); 306f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 307ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen int64_t durationUs = 0; 308ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen if (mWaveFormat == WAVE_FORMAT_MSGSM) { 309ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen // 65 bytes decode to 320 8kHz samples 310ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen durationUs = 311ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen 1000000LL * (mDataSize / 65 * 320) / 8000; 312ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } else { 313ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen size_t bytesPerSample = mBitsPerSample >> 3; 314e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake 315e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake if (!bytesPerSample || !mNumChannels) 316e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake return ERROR_MALFORMED; 317e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake 318e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake size_t num_samples = mDataSize / (mNumChannels * bytesPerSample); 319e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake 320e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake if (!mSampleRate) 321e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake return ERROR_MALFORMED; 322e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake 323ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen durationUs = 324e52267adab4c89169aafd10a0fa2656ccb02c039Joshua J. Drake 1000000LL * num_samples / mSampleRate; 325ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } 326f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 327f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mTrackMeta->setInt64(kKeyDuration, durationUs); 328f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 3290dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return OK; 3300dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 3310dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 3320dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3330dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber offset += chunkSize; 3340dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 3350dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3360dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return NO_INIT; 3370dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 3380dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3390dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberconst size_t WAVSource::kMaxFrameSize = 32768; 3400dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3410dba73763a04d39faf999dcc5ef12af3c99535a7Andreas HuberWAVSource::WAVSource( 3420dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber const sp<DataSource> &dataSource, 343f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber const sp<MetaData> &meta, 34442d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber uint16_t waveFormat, 345f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber int32_t bitsPerSample, 346c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t offset, size_t size) 3470dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber : mDataSource(dataSource), 348f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mMeta(meta), 34942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber mWaveFormat(waveFormat), 350f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mSampleRate(0), 351f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mNumChannels(0), 352f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mBitsPerSample(bitsPerSample), 3530dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mOffset(offset), 3540dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mSize(size), 3550dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mStarted(false), 3560dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mGroup(NULL) { 357f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber CHECK(mMeta->findInt32(kKeySampleRate, &mSampleRate)); 358f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber CHECK(mMeta->findInt32(kKeyChannelCount, &mNumChannels)); 359bbba88cb1bdc34705d1477208990a06904c022e7Andreas Huber 360bbba88cb1bdc34705d1477208990a06904c022e7Andreas Huber mMeta->setInt32(kKeyMaxInputSize, kMaxFrameSize); 3610dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 3620dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3630dba73763a04d39faf999dcc5ef12af3c99535a7Andreas HuberWAVSource::~WAVSource() { 3640dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (mStarted) { 3650dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber stop(); 3660dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 3670dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 3680dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 36984333e0475bc911adc16417f4ca327c975cf6c36Andreas Huberstatus_t WAVSource::start(MetaData * /* params */) { 3703856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("WAVSource::start"); 3710dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3720dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber CHECK(!mStarted); 3730dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3740dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mGroup = new MediaBufferGroup; 3750dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mGroup->add_buffer(new MediaBuffer(kMaxFrameSize)); 3760dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 377f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber if (mBitsPerSample == 8) { 378f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber // As a temporary buffer for 8->16 bit conversion. 379f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mGroup->add_buffer(new MediaBuffer(kMaxFrameSize)); 380f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber } 381f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 3820dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mCurrentPos = mOffset; 3830dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3840dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mStarted = true; 3850dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3860dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return OK; 3870dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 3880dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3890dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberstatus_t WAVSource::stop() { 3903856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("WAVSource::stop"); 3910dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3920dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber CHECK(mStarted); 3930dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3940dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber delete mGroup; 3950dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mGroup = NULL; 3960dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3970dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mStarted = false; 3980dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 3990dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return OK; 4000dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 4010dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4020dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Hubersp<MetaData> WAVSource::getFormat() { 4033856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("WAVSource::getFormat"); 4040dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 405f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber return mMeta; 4060dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 4070dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4080dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberstatus_t WAVSource::read( 4090dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber MediaBuffer **out, const ReadOptions *options) { 4100dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber *out = NULL; 4110dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4120dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber int64_t seekTimeUs; 413abd1f4f870925d6776dbe4b930b759a1ab6595caAndreas Huber ReadOptions::SeekMode mode; 414abd1f4f870925d6776dbe4b930b759a1ab6595caAndreas Huber if (options != NULL && options->getSeekTo(&seekTimeUs, &mode)) { 415ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen int64_t pos = 0; 416ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen 417ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen if (mWaveFormat == WAVE_FORMAT_MSGSM) { 418ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen // 65 bytes decode to 320 8kHz samples 419ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen int64_t samplenumber = (seekTimeUs * mSampleRate) / 1000000; 420ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen int64_t framenumber = samplenumber / 320; 421ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen pos = framenumber * 65; 422ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } else { 423ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen pos = (seekTimeUs * mSampleRate) / 1000000 * mNumChannels * (mBitsPerSample >> 3); 424ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } 425a5750e0dad9e90f2195ce36f2c4457fa04b2b83eMark Salyzyn if (pos > (off64_t)mSize) { 4260dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber pos = mSize; 4270dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 4280dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber mCurrentPos = pos + mOffset; 4290dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 4300dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4310dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber MediaBuffer *buffer; 4320dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber status_t err = mGroup->acquire_buffer(&buffer); 4330dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (err != OK) { 4340dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return err; 4350dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 4360dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4379b1797fed7065be05f8fb7a36d1a27e0df3cb7abcong.zhou // make sure that maxBytesToRead is multiple of 3, in 24-bit case 438104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber size_t maxBytesToRead = 4399b1797fed7065be05f8fb7a36d1a27e0df3cb7abcong.zhou mBitsPerSample == 8 ? kMaxFrameSize / 2 : 4409b1797fed7065be05f8fb7a36d1a27e0df3cb7abcong.zhou (mBitsPerSample == 24 ? 3*(kMaxFrameSize/3): kMaxFrameSize); 441104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber 442104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber size_t maxBytesAvailable = 443c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong (mCurrentPos - mOffset >= (off64_t)mSize) 444104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber ? 0 : mSize - (mCurrentPos - mOffset); 445104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber 446104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber if (maxBytesToRead > maxBytesAvailable) { 447104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber maxBytesToRead = maxBytesAvailable; 448104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber } 449104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber 450ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen if (mWaveFormat == WAVE_FORMAT_MSGSM) { 451ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen // Microsoft packs 2 frames into 65 bytes, rather than using separate 33-byte frames, 452ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen // so read multiples of 65, and use smaller buffers to account for ~10:1 expansion ratio 453ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen if (maxBytesToRead > 1024) { 454ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen maxBytesToRead = 1024; 455ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } 456ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen maxBytesToRead = (maxBytesToRead / 65) * 65; 45741d3f579d2c166984958263533284209b90c87d5Marco Nelissen } else { 45841d3f579d2c166984958263533284209b90c87d5Marco Nelissen // read only integral amounts of audio unit frames. 45941d3f579d2c166984958263533284209b90c87d5Marco Nelissen const size_t inputUnitFrameSize = mNumChannels * mBitsPerSample / 8; 46041d3f579d2c166984958263533284209b90c87d5Marco Nelissen maxBytesToRead -= maxBytesToRead % inputUnitFrameSize; 461ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } 462ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen 4630dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber ssize_t n = mDataSource->readAt( 464f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber mCurrentPos, buffer->data(), 465104fcb88d4125caff74f63be4ce23537ca693ac7Andreas Huber maxBytesToRead); 4660dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4670dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (n <= 0) { 4680dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber buffer->release(); 4690dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber buffer = NULL; 4700dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4710dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return ERROR_END_OF_STREAM; 4720dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 4730dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 4740dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber buffer->set_range(0, n); 475f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 4769b1797fed7065be05f8fb7a36d1a27e0df3cb7abcong.zhou if (mWaveFormat == WAVE_FORMAT_PCM || mWaveFormat == WAVE_FORMAT_EXTENSIBLE) { 47742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber if (mBitsPerSample == 8) { 47842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber // Convert 8-bit unsigned samples to 16-bit signed. 479f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 48042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber MediaBuffer *tmp; 481f1d5aa162c02a16b7195a43a9bcea4d592600ac4James Dong CHECK_EQ(mGroup->acquire_buffer(&tmp), (status_t)OK); 482f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 48342d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber // The new buffer holds the sample number of samples, but each 48442d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber // one is 2 bytes wide. 48542d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber tmp->set_range(0, 2 * n); 486f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 48742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber int16_t *dst = (int16_t *)tmp->data(); 48842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber const uint8_t *src = (const uint8_t *)buffer->data(); 4890b3f21761eae9b7d230ddd9b4be76ef02d4cec15Gloria Wang ssize_t numBytes = n; 4900b3f21761eae9b7d230ddd9b4be76ef02d4cec15Gloria Wang 4910b3f21761eae9b7d230ddd9b4be76ef02d4cec15Gloria Wang while (numBytes-- > 0) { 49242d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber *dst++ = ((int16_t)(*src) - 128) * 256; 49342d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber ++src; 49442d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } 495f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 49642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber buffer->release(); 49742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber buffer = tmp; 49842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } else if (mBitsPerSample == 24) { 49942d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber // Convert 24-bit signed samples to 16-bit signed. 50042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber 50142d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber const uint8_t *src = 50242d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber (const uint8_t *)buffer->data() + buffer->range_offset(); 50342d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber int16_t *dst = (int16_t *)src; 50442d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber 50542d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber size_t numSamples = buffer->range_length() / 3; 50642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber for (size_t i = 0; i < numSamples; ++i) { 50742d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber int32_t x = (int32_t)(src[0] | src[1] << 8 | src[2] << 16); 50842d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber x = (x << 8) >> 8; // sign extension 509984d8f40c15e7fd757a9fdc007aad75549aa0fceAndreas Huber 51042d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber x = x >> 8; 51142d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber *dst++ = (int16_t)x; 51242d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber src += 3; 51342d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } 51442d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber 51542d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber buffer->set_range(buffer->range_offset(), 2 * numSamples); 51642d66f25af9cb8089a93c6796876a6bc16e36ceaAndreas Huber } 517f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber } 518f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 519ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen int64_t timeStampUs = 0; 520ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen 521ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen if (mWaveFormat == WAVE_FORMAT_MSGSM) { 522ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen timeStampUs = 1000000LL * (mCurrentPos - mOffset) * 320 / 65 / mSampleRate; 523ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } else { 524ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen size_t bytesPerSample = mBitsPerSample >> 3; 525ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen timeStampUs = 1000000LL * (mCurrentPos - mOffset) 526ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen / (mNumChannels * bytesPerSample) / mSampleRate; 527ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen } 528f99f049dd228333e3d6f886efe373f8e461ff2daAndreas Huber 529ba933df89521d63f75ca66af12ce9d7ae9496b9eMarco Nelissen buffer->meta_data()->setInt64(kKeyTime, timeStampUs); 5300dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5318bf59e735760af0b6a85747fd90bf8cf1e5388d7Andreas Huber buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); 532f1e10e8ed74cac805d601139882378a1f450fe94James Dong mCurrentPos += n; 5330dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5340dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber *out = buffer; 5350dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5360dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return OK; 5370dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 5380dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5390dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber//////////////////////////////////////////////////////////////////////////////// 5400dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5410dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huberbool SniffWAV( 5425a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber const sp<DataSource> &source, String8 *mimeType, float *confidence, 5435a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber sp<AMessage> *) { 5440dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber char header[12]; 5450dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (source->readAt(0, header, sizeof(header)) < (ssize_t)sizeof(header)) { 5460dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return false; 5470dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 5480dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5490dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber if (memcmp(header, "RIFF", 4) || memcmp(&header[8], "WAVE", 4)) { 5500dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return false; 5510dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber } 5520dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 55370d3e260edcd42972864bf501337f0b1a187657dJames Dong sp<MediaExtractor> extractor = new WAVExtractor(source); 55470d3e260edcd42972864bf501337f0b1a187657dJames Dong if (extractor->countTracks() == 0) { 55570d3e260edcd42972864bf501337f0b1a187657dJames Dong return false; 55670d3e260edcd42972864bf501337f0b1a187657dJames Dong } 55770d3e260edcd42972864bf501337f0b1a187657dJames Dong 5580dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber *mimeType = MEDIA_MIMETYPE_CONTAINER_WAV; 5590dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber *confidence = 0.3f; 5600dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5610dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber return true; 5620dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} 5630dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber 5640dba73763a04d39faf999dcc5ef12af3c99535a7Andreas Huber} // namespace android 565