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280 lines
6.7 KiB
280 lines
6.7 KiB
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fcntl.h>
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#include <inttypes.h>
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#include <sys/prctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <media/stagefright/foundation/ADebug.h>
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#include <media/stagefright/AMRWriter.h>
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#include <media/stagefright/MediaBuffer.h>
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#include <media/stagefright/MediaDefs.h>
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#include <media/stagefright/MediaErrors.h>
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#include <media/stagefright/MetaData.h>
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#include <media/stagefright/MediaSource.h>
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#include <media/mediarecorder.h>
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namespace android {
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AMRWriter::AMRWriter(int fd)
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: mFd(dup(fd)),
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mInitCheck(mFd < 0? NO_INIT: OK),
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mStarted(false),
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mPaused(false),
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mResumed(false) {
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}
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AMRWriter::~AMRWriter() {
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if (mStarted) {
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reset();
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}
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if (mFd != -1) {
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close(mFd);
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mFd = -1;
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}
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}
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status_t AMRWriter::initCheck() const {
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return mInitCheck;
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}
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status_t AMRWriter::addSource(const sp<MediaSource> &source) {
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if (mInitCheck != OK) {
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return mInitCheck;
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}
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if (mSource != NULL) {
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// AMR files only support a single track of audio.
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return UNKNOWN_ERROR;
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}
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sp<MetaData> meta = source->getFormat();
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const char *mime;
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CHECK(meta->findCString(kKeyMIMEType, &mime));
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bool isWide = false;
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if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
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isWide = true;
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} else if (strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)) {
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return ERROR_UNSUPPORTED;
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}
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int32_t channelCount;
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int32_t sampleRate;
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CHECK(meta->findInt32(kKeyChannelCount, &channelCount));
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CHECK_EQ(channelCount, 1);
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CHECK(meta->findInt32(kKeySampleRate, &sampleRate));
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CHECK_EQ(sampleRate, (isWide ? 16000 : 8000));
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mSource = source;
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const char *kHeader = isWide ? "#!AMR-WB\n" : "#!AMR\n";
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ssize_t n = strlen(kHeader);
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if (write(mFd, kHeader, n) != n) {
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return ERROR_IO;
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}
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return OK;
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}
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status_t AMRWriter::start(MetaData * /* params */) {
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if (mInitCheck != OK) {
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return mInitCheck;
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}
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if (mSource == NULL) {
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return UNKNOWN_ERROR;
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}
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if (mStarted && mPaused) {
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mPaused = false;
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mResumed = true;
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return OK;
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} else if (mStarted) {
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// Already started, does nothing
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return OK;
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}
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status_t err = mSource->start();
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if (err != OK) {
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return err;
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}
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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mReachedEOS = false;
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mDone = false;
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pthread_create(&mThread, &attr, ThreadWrapper, this);
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pthread_attr_destroy(&attr);
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mStarted = true;
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return OK;
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}
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status_t AMRWriter::pause() {
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if (!mStarted) {
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return OK;
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}
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mPaused = true;
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return OK;
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}
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status_t AMRWriter::reset() {
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if (!mStarted) {
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return OK;
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}
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mDone = true;
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void *dummy;
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status_t status = mSource->stop();
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pthread_join(mThread, &dummy);
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status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy));
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{
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if (err == OK &&
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(status != OK && status != ERROR_END_OF_STREAM)) {
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err = status;
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}
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}
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mStarted = false;
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return err;
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}
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bool AMRWriter::exceedsFileSizeLimit() {
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if (mMaxFileSizeLimitBytes == 0) {
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return false;
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}
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return mEstimatedSizeBytes >= mMaxFileSizeLimitBytes;
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}
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bool AMRWriter::exceedsFileDurationLimit() {
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if (mMaxFileDurationLimitUs == 0) {
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return false;
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}
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return mEstimatedDurationUs >= mMaxFileDurationLimitUs;
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}
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// static
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void *AMRWriter::ThreadWrapper(void *me) {
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return (void *)(uintptr_t) static_cast<AMRWriter *>(me)->threadFunc();
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}
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status_t AMRWriter::threadFunc() {
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mEstimatedDurationUs = 0;
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mEstimatedSizeBytes = 0;
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bool stoppedPrematurely = true;
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int64_t previousPausedDurationUs = 0;
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int64_t maxTimestampUs = 0;
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status_t err = OK;
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prctl(PR_SET_NAME, (unsigned long)"AMRWriter", 0, 0, 0);
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while (!mDone) {
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MediaBufferBase *buffer;
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err = mSource->read(&buffer);
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if (err != OK) {
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break;
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}
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if (mPaused) {
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buffer->release();
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buffer = NULL;
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continue;
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}
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mEstimatedSizeBytes += buffer->range_length();
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if (exceedsFileSizeLimit()) {
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buffer->release();
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buffer = NULL;
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notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0);
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break;
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}
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int64_t timestampUs;
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CHECK(buffer->meta_data().findInt64(kKeyTime, ×tampUs));
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if (timestampUs > mEstimatedDurationUs) {
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mEstimatedDurationUs = timestampUs;
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}
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if (mResumed) {
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previousPausedDurationUs += (timestampUs - maxTimestampUs - 20000);
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mResumed = false;
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}
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timestampUs -= previousPausedDurationUs;
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ALOGV("time stamp: %" PRId64 ", previous paused duration: %" PRId64,
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timestampUs, previousPausedDurationUs);
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if (timestampUs > maxTimestampUs) {
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maxTimestampUs = timestampUs;
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}
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if (exceedsFileDurationLimit()) {
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buffer->release();
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buffer = NULL;
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notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0);
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break;
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}
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ssize_t n = write(mFd,
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(const uint8_t *)buffer->data() + buffer->range_offset(),
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buffer->range_length());
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if (n < (ssize_t)buffer->range_length()) {
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buffer->release();
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buffer = NULL;
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err = ERROR_IO;
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break;
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}
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if (err != OK) {
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break;
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}
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if (stoppedPrematurely) {
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stoppedPrematurely = false;
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}
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buffer->release();
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buffer = NULL;
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}
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if ((err == OK || err == ERROR_END_OF_STREAM) && stoppedPrematurely) {
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err = ERROR_MALFORMED;
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}
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close(mFd);
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mFd = -1;
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mReachedEOS = true;
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if (err == ERROR_END_OF_STREAM) {
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return OK;
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}
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return err;
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}
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bool AMRWriter::reachedEOS() {
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return mReachedEOS;
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}
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} // namespace android
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