| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "MP3Decoder" |
| |
| #include "MP3Decoder.h" |
| |
| #include "include/pvmp3decoder_api.h" |
| |
| #include <media/stagefright/MediaBufferGroup.h> |
| #include <media/stagefright/MediaDebug.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MetaData.h> |
| |
| namespace android { |
| |
| MP3Decoder::MP3Decoder(const sp<MediaSource> &source) |
| : mSource(source), |
| mNumChannels(0), |
| mStarted(false), |
| mBufferGroup(NULL), |
| mConfig(new tPVMP3DecoderExternal), |
| mDecoderBuf(NULL), |
| mAnchorTimeUs(0), |
| mNumFramesOutput(0), |
| mInputBuffer(NULL) { |
| init(); |
| } |
| |
| void MP3Decoder::init() { |
| sp<MetaData> srcFormat = mSource->getFormat(); |
| |
| int32_t sampleRate; |
| CHECK(srcFormat->findInt32(kKeyChannelCount, &mNumChannels)); |
| CHECK(srcFormat->findInt32(kKeySampleRate, &sampleRate)); |
| |
| mMeta = new MetaData; |
| mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW); |
| mMeta->setInt32(kKeyChannelCount, mNumChannels); |
| mMeta->setInt32(kKeySampleRate, sampleRate); |
| |
| int64_t durationUs; |
| if (srcFormat->findInt64(kKeyDuration, &durationUs)) { |
| mMeta->setInt64(kKeyDuration, durationUs); |
| } |
| |
| mMeta->setCString(kKeyDecoderComponent, "MP3Decoder"); |
| } |
| |
| MP3Decoder::~MP3Decoder() { |
| if (mStarted) { |
| stop(); |
| } |
| |
| delete mConfig; |
| mConfig = NULL; |
| } |
| |
| status_t MP3Decoder::start(MetaData *params) { |
| CHECK(!mStarted); |
| |
| mBufferGroup = new MediaBufferGroup; |
| mBufferGroup->add_buffer(new MediaBuffer(4608 * 2)); |
| |
| mConfig->equalizerType = flat; |
| mConfig->crcEnabled = false; |
| |
| uint32_t memRequirements = pvmp3_decoderMemRequirements(); |
| mDecoderBuf = malloc(memRequirements); |
| |
| pvmp3_InitDecoder(mConfig, mDecoderBuf); |
| |
| mSource->start(); |
| |
| mAnchorTimeUs = 0; |
| mNumFramesOutput = 0; |
| mStarted = true; |
| |
| return OK; |
| } |
| |
| status_t MP3Decoder::stop() { |
| CHECK(mStarted); |
| |
| if (mInputBuffer) { |
| mInputBuffer->release(); |
| mInputBuffer = NULL; |
| } |
| |
| free(mDecoderBuf); |
| mDecoderBuf = NULL; |
| |
| delete mBufferGroup; |
| mBufferGroup = NULL; |
| |
| mSource->stop(); |
| |
| mStarted = false; |
| |
| return OK; |
| } |
| |
| sp<MetaData> MP3Decoder::getFormat() { |
| return mMeta; |
| } |
| |
| status_t MP3Decoder::read( |
| MediaBuffer **out, const ReadOptions *options) { |
| status_t err; |
| |
| *out = NULL; |
| |
| int64_t seekTimeUs; |
| ReadOptions::SeekMode mode; |
| if (options && options->getSeekTo(&seekTimeUs, &mode)) { |
| CHECK(seekTimeUs >= 0); |
| |
| mNumFramesOutput = 0; |
| |
| if (mInputBuffer) { |
| mInputBuffer->release(); |
| mInputBuffer = NULL; |
| } |
| |
| // Make sure that the next buffer output does not still |
| // depend on fragments from the last one decoded. |
| pvmp3_InitDecoder(mConfig, mDecoderBuf); |
| } else { |
| seekTimeUs = -1; |
| } |
| |
| if (mInputBuffer == NULL) { |
| err = mSource->read(&mInputBuffer, options); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| int64_t timeUs; |
| if (mInputBuffer->meta_data()->findInt64(kKeyTime, &timeUs)) { |
| mAnchorTimeUs = timeUs; |
| mNumFramesOutput = 0; |
| } else { |
| // We must have a new timestamp after seeking. |
| CHECK(seekTimeUs < 0); |
| } |
| } |
| |
| MediaBuffer *buffer; |
| CHECK_EQ(mBufferGroup->acquire_buffer(&buffer), OK); |
| |
| mConfig->pInputBuffer = |
| (uint8_t *)mInputBuffer->data() + mInputBuffer->range_offset(); |
| |
| mConfig->inputBufferCurrentLength = mInputBuffer->range_length(); |
| mConfig->inputBufferMaxLength = 0; |
| mConfig->inputBufferUsedLength = 0; |
| |
| mConfig->outputFrameSize = buffer->size() / sizeof(int16_t); |
| mConfig->pOutputBuffer = static_cast<int16_t *>(buffer->data()); |
| |
| ERROR_CODE decoderErr; |
| if ((decoderErr = pvmp3_framedecoder(mConfig, mDecoderBuf)) |
| != NO_DECODING_ERROR) { |
| LOGV("mp3 decoder returned error %d", decoderErr); |
| |
| if (decoderErr != NO_ENOUGH_MAIN_DATA_ERROR || |
| mConfig->outputFrameSize == 0) { |
| |
| if (mConfig->outputFrameSize == 0) { |
| LOGE("Output frame size is 0"); |
| } |
| buffer->release(); |
| buffer = NULL; |
| |
| mInputBuffer->release(); |
| mInputBuffer = NULL; |
| |
| return UNKNOWN_ERROR; |
| } |
| |
| // This is recoverable, just ignore the current frame and |
| // play silence instead. |
| memset(buffer->data(), 0, mConfig->outputFrameSize * sizeof(int16_t)); |
| mConfig->inputBufferUsedLength = mInputBuffer->range_length(); |
| } |
| |
| buffer->set_range( |
| 0, mConfig->outputFrameSize * sizeof(int16_t)); |
| |
| mInputBuffer->set_range( |
| mInputBuffer->range_offset() + mConfig->inputBufferUsedLength, |
| mInputBuffer->range_length() - mConfig->inputBufferUsedLength); |
| |
| if (mInputBuffer->range_length() == 0) { |
| mInputBuffer->release(); |
| mInputBuffer = NULL; |
| } |
| |
| buffer->meta_data()->setInt64( |
| kKeyTime, |
| mAnchorTimeUs |
| + (mNumFramesOutput * 1000000) / mConfig->samplingRate); |
| |
| mNumFramesOutput += mConfig->outputFrameSize / mNumChannels; |
| |
| *out = buffer; |
| |
| return OK; |
| } |
| |
| } // namespace android |