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-rw-r--r--media/libstagefright/WAVEWriter.cpp324
1 files changed, 324 insertions, 0 deletions
diff --git a/media/libstagefright/WAVEWriter.cpp b/media/libstagefright/WAVEWriter.cpp
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+++ b/media/libstagefright/WAVEWriter.cpp
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+/*
+* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+* * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* * Redistributions in binary form must reproduce the above
+* copyright notice, this list of conditions and the following
+* disclaimer in the documentation and/or other materials provided
+* with the distribution.
+* * Neither the name of The Linux Foundation nor the names of its
+* contributors may be used to endorse or promote products derived
+* from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "WAVEWriter"
+#include <utils/Log.h>
+
+#include <media/stagefright/WAVEWriter.h>
+#include <media/stagefright/MediaBuffer.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/MediaDefs.h>
+#include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/MediaSource.h>
+#include <media/stagefright/MetaData.h>
+#include <media/mediarecorder.h>
+#include <sys/prctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <inttypes.h>
+
+namespace android {
+
+static struct wav_header hdr;
+
+
+WAVEWriter::WAVEWriter(const char *filename)
+ : mFd(-1),
+ mInitCheck(NO_INIT),
+ mStarted(false),
+ mPaused(false),
+ mResumed(false) {
+
+ mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR);
+ if (mFd >= 0) {
+ mInitCheck = OK;
+ }
+}
+
+WAVEWriter::WAVEWriter(int fd)
+ : mFd(dup(fd)),
+ mInitCheck(mFd < 0? NO_INIT: OK),
+ mStarted(false),
+ mPaused(false),
+ mResumed(false) {
+}
+
+WAVEWriter::~WAVEWriter() {
+ if (mStarted) {
+ stop();
+ }
+
+ if (mFd != -1) {
+ close(mFd);
+ mFd = -1;
+ }
+}
+
+status_t WAVEWriter::initCheck() const {
+ return mInitCheck;
+}
+
+status_t WAVEWriter::addSource(const sp<MediaSource> &source) {
+ if (mInitCheck != OK) {
+ ALOGE("Init Check not OK, return");
+ return mInitCheck;
+ }
+
+ if (mSource != NULL) {
+ ALOGE("A source already exists, return");
+ return UNKNOWN_ERROR;
+ }
+
+ sp<MetaData> meta = source->getFormat();
+
+ const char *mime;
+ CHECK(meta->findCString(kKeyMIMEType, &mime));
+
+ int32_t channelCount;
+ int32_t sampleRate;
+ CHECK(meta->findInt32(kKeyChannelCount, &channelCount));
+ CHECK(meta->findInt32(kKeySampleRate, &sampleRate));
+
+ memset(&hdr, 0, sizeof(struct wav_header));
+ hdr.riff_id = ID_RIFF;
+ hdr.riff_fmt = ID_WAVE;
+ hdr.fmt_id = ID_FMT;
+ hdr.fmt_sz = 16;
+ hdr.audio_format = FORMAT_PCM;
+ hdr.num_channels = channelCount;
+ hdr.sample_rate = sampleRate;
+ hdr.bits_per_sample = 16;
+ hdr.byte_rate = (sampleRate * channelCount * hdr.bits_per_sample) / 8;
+ hdr.block_align = ( hdr.bits_per_sample * channelCount ) / 8;
+ hdr.data_id = ID_DATA;
+ hdr.data_sz = 0;
+ hdr.riff_sz = hdr.data_sz + 44 - 8;
+
+ if (write(mFd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
+ ALOGE("Write header error, return ERROR_IO");
+ return -ERROR_IO;
+ }
+
+ mSource = source;
+
+ return OK;
+}
+
+status_t WAVEWriter::start(MetaData * /* params */) {
+ if (mInitCheck != OK) {
+ ALOGE("Init Check not OK, return");
+ return mInitCheck;
+ }
+
+ if (mSource == NULL) {
+ ALOGE("NULL Source");
+ return UNKNOWN_ERROR;
+ }
+
+ if (mStarted && mPaused) {
+ mPaused = false;
+ mResumed = true;
+ return OK;
+ } else if (mStarted) {
+ ALOGE("Already startd, return");
+ return OK;
+ }
+
+ status_t err = mSource->start();
+
+ if (err != OK) {
+ return err;
+ }
+
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
+
+ mReachedEOS = false;
+ mDone = false;
+
+ pthread_create(&mThread, &attr, ThreadWrapper, this);
+ pthread_attr_destroy(&attr);
+
+ mStarted = true;
+
+ return OK;
+}
+
+status_t WAVEWriter::pause() {
+ if (!mStarted) {
+ return OK;
+ }
+ mPaused = true;
+ return OK;
+}
+
+status_t WAVEWriter::stop() {
+ if (!mStarted) {
+ return OK;
+ }
+
+ mDone = true;
+
+ void *dummy;
+ pthread_join(mThread, &dummy);
+
+ status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy));
+ {
+ status_t status = mSource->stop();
+ if (err == OK &&
+ (status != OK && status != ERROR_END_OF_STREAM)) {
+ err = status;
+ }
+ }
+
+ mStarted = false;
+ return err;
+}
+
+bool WAVEWriter::exceedsFileSizeLimit() {
+ if (mMaxFileSizeLimitBytes == 0) {
+ return false;
+ }
+ return mEstimatedSizeBytes >= mMaxFileSizeLimitBytes;
+}
+
+bool WAVEWriter::exceedsFileDurationLimit() {
+ if (mMaxFileDurationLimitUs == 0) {
+ return false;
+ }
+ return mEstimatedDurationUs >= mMaxFileDurationLimitUs;
+}
+
+// static
+void *WAVEWriter::ThreadWrapper(void *me) {
+ return (void *) (uintptr_t)static_cast<WAVEWriter *>(me)->threadFunc();
+}
+
+status_t WAVEWriter::threadFunc() {
+ mEstimatedDurationUs = 0;
+ mEstimatedSizeBytes = 0;
+ bool stoppedPrematurely = true;
+ int64_t previousPausedDurationUs = 0;
+ int64_t maxTimestampUs = 0;
+ status_t err = OK;
+
+ prctl(PR_SET_NAME, (unsigned long)"WAVEWriter", 0, 0, 0);
+ hdr.data_sz = 0;
+ while (!mDone) {
+ MediaBuffer *buffer;
+ err = mSource->read(&buffer);
+
+ if (err != OK) {
+ break;
+ }
+
+ if (mPaused) {
+ buffer->release();
+ buffer = NULL;
+ continue;
+ }
+
+ mEstimatedSizeBytes += buffer->range_length();
+ if (exceedsFileSizeLimit()) {
+ buffer->release();
+ buffer = NULL;
+ notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0);
+ break;
+ }
+
+ int64_t timestampUs;
+ CHECK(buffer->meta_data()->findInt64(kKeyTime, &timestampUs));
+ if (timestampUs > mEstimatedDurationUs) {
+ mEstimatedDurationUs = timestampUs;
+ }
+ if (mResumed) {
+ previousPausedDurationUs += (timestampUs - maxTimestampUs - 20000);
+ mResumed = false;
+ }
+ timestampUs -= previousPausedDurationUs;
+ ALOGV("time stamp: %" PRId64 ", previous paused duration: %" PRId64,
+ timestampUs, previousPausedDurationUs);
+ if (timestampUs > maxTimestampUs) {
+ maxTimestampUs = timestampUs;
+ }
+
+ if (exceedsFileDurationLimit()) {
+ buffer->release();
+ buffer = NULL;
+ notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0);
+ break;
+ }
+ ssize_t n = write(mFd,
+ (const uint8_t *)buffer->data() + buffer->range_offset(),
+ buffer->range_length());
+
+ hdr.data_sz += (ssize_t)buffer->range_length();
+ hdr.riff_sz = hdr.data_sz + 44 - 8;
+
+ if (n < (ssize_t)buffer->range_length()) {
+ buffer->release();
+ buffer = NULL;
+
+ break;
+ }
+
+ if (stoppedPrematurely) {
+ stoppedPrematurely = false;
+ }
+
+ buffer->release();
+ buffer = NULL;
+ }
+
+ if (stoppedPrematurely) {
+ notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, UNKNOWN_ERROR);
+ }
+
+ lseek(mFd, 0, SEEK_SET);
+ write(mFd, &hdr, sizeof(hdr));
+ lseek(mFd, 0, SEEK_END);
+
+ close(mFd);
+ mFd = -1;
+ mReachedEOS = true;
+ if (err == ERROR_END_OF_STREAM) {
+ return OK;
+ }
+ return err;
+}
+
+bool WAVEWriter::reachedEOS() {
+ return mReachedEOS;
+}
+
+} // namespace android
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