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-rw-r--r--media/libstagefright/ExtendedWriter.cpp390
1 files changed, 390 insertions, 0 deletions
diff --git a/media/libstagefright/ExtendedWriter.cpp b/media/libstagefright/ExtendedWriter.cpp
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+++ b/media/libstagefright/ExtendedWriter.cpp
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+/*
+ * Copyright (c) 2012, The Linux Foundation. All rights reserved.
+ *
+ * Not a Contribution, Apache license notifications and license are retained
+ * for attribution purposes only.
+ * 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.
+ */
+
+#include <media/stagefright/ExtendedWriter.h>
+#include <media/stagefright/MediaBuffer.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 <system/audio.h>
+
+#include <sys/prctl.h>
+#include <sys/resource.h>
+
+#include <arpa/inet.h>
+#include <QCMediaDefs.h>
+
+#undef LOG_TAG
+#define LOG_TAG "ExtendedWriter"
+
+namespace android {
+
+ExtendedWriter::ExtendedWriter(const char *filename)
+ : mFile(fopen(filename, "wb")),
+ mInitCheck(mFile != NULL ? OK : NO_INIT),
+ mStarted(false),
+ mPaused(false),
+ mResumed(false),
+ mOffset(0) {
+}
+
+ExtendedWriter::ExtendedWriter(int fd)
+ : mFile(fdopen(fd, "wb")),
+ mInitCheck(mFile != NULL ? OK : NO_INIT),
+ mStarted(false),
+ mPaused(false),
+ mResumed(false),
+ mOffset(0) {
+}
+
+ExtendedWriter::~ExtendedWriter() {
+ if (mStarted) {
+ stop();
+ }
+
+ if (mFile != NULL) {
+ fclose(mFile);
+ mFile = NULL;
+ }
+}
+
+status_t ExtendedWriter::initCheck() const {
+ return mInitCheck;
+}
+
+status_t ExtendedWriter::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));
+
+ if ( !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_QCELP)) {
+ mFormat = AUDIO_FORMAT_QCELP;
+ } else if ( !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_EVRC)) {
+ mFormat = AUDIO_FORMAT_EVRC;
+ }
+ else {
+ return UNKNOWN_ERROR;
+ }
+
+ int32_t channelCount;
+ int32_t sampleRate;
+ CHECK(meta->findInt32(kKeyChannelCount, &channelCount));
+ CHECK_EQ(channelCount, 1);
+ CHECK(meta->findInt32(kKeySampleRate, &sampleRate));
+ CHECK_EQ(sampleRate, 8000);
+
+ mSource = source;
+
+ return OK;
+}
+
+status_t ExtendedWriter::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;
+ }
+
+ //space for header;
+ size_t headerSize = sizeof( struct QCPEVRCHeader );
+ uint8_t * header = (uint8_t *)malloc(headerSize);
+ memset( header, '?', headerSize);
+ fwrite( header, 1, headerSize, mFile );
+ mOffset += headerSize;
+ delete header;
+
+ 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 ExtendedWriter::pause() {
+ if (!mStarted) {
+ return OK;
+ }
+ mPaused = true;
+ return OK;
+}
+
+status_t ExtendedWriter::stop() {
+ if (!mStarted) {
+ return OK;
+ }
+
+ mDone = true;
+
+ void *dummy;
+ pthread_join(mThread, &dummy);
+
+ status_t err = (status_t) dummy;
+ {
+ status_t status = mSource->stop();
+ if (err == OK &&
+ (status != OK && status != ERROR_END_OF_STREAM)) {
+ err = status;
+ }
+ }
+
+ mStarted = false;
+ return err;
+}
+
+bool ExtendedWriter::exceedsFileSizeLimit() {
+ if (mMaxFileSizeLimitBytes == 0) {
+ return false;
+ }
+ return mEstimatedSizeBytes >= mMaxFileSizeLimitBytes;
+}
+
+bool ExtendedWriter::exceedsFileDurationLimit() {
+ if (mMaxFileDurationLimitUs == 0) {
+ return false;
+ }
+ return mEstimatedDurationUs >= mMaxFileDurationLimitUs;
+}
+
+// static
+void *ExtendedWriter::ThreadWrapper(void *me) {
+ return (void *) static_cast<ExtendedWriter *>(me)->threadFunc();
+}
+
+status_t ExtendedWriter::threadFunc() {
+ mEstimatedDurationUs = 0;
+ mEstimatedSizeBytes = 0;
+ bool stoppedPrematurely = true;
+ int64_t previousPausedDurationUs = 0;
+ int64_t maxTimestampUs = 0;
+ status_t err = OK;
+
+ pid_t tid = gettid();
+ androidSetThreadPriority(tid, ANDROID_PRIORITY_AUDIO);
+ prctl(PR_SET_NAME, (unsigned long)"ExtendedWriter", 0, 0, 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: %lld, previous paused duration: %lld",
+ 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 = fwrite(
+ (const uint8_t *)buffer->data() + buffer->range_offset(),
+ 1,
+ buffer->range_length(),
+ mFile);
+ mOffset += n;
+
+ if (n < (ssize_t)buffer->range_length()) {
+ buffer->release();
+ buffer = NULL;
+
+ break;
+ }
+
+ // XXX: How to tell it is stopped prematurely?
+ if (stoppedPrematurely) {
+ stoppedPrematurely = false;
+ }
+
+ buffer->release();
+ buffer = NULL;
+ }
+
+ if (stoppedPrematurely) {
+ notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, UNKNOWN_ERROR);
+ }
+
+ if ( mFormat == AUDIO_FORMAT_QCELP ) {
+ writeQCPHeader( );
+ }
+ else if ( mFormat == AUDIO_FORMAT_EVRC ) {
+ writeEVRCHeader( );
+ }
+
+ fflush(mFile);
+ fclose(mFile);
+ mFile = NULL;
+ mReachedEOS = true;
+ if (err == ERROR_END_OF_STREAM || (err == -ETIMEDOUT)) {
+ return OK;
+ }
+ return err;
+}
+
+bool ExtendedWriter::reachedEOS() {
+ return mReachedEOS;
+}
+
+status_t ExtendedWriter::writeQCPHeader() {
+ /* Common part */
+ struct QCPEVRCHeader header = {
+ {'R', 'I', 'F', 'F'}, 0, {'Q', 'L', 'C', 'M'}, /* Riff */
+ {'f', 'm', 't', ' '}, 150, 1, 0, 0, 0, 0,{0}, 0, {0},0,0,160,8000,16,0,{0},{0},{0}, /* Fmt */
+ {'v','r','a','t'}, 0, 0, 0, /* Vrat */
+ {'d','a','t','a'},0 /* Data */
+ };
+
+ fseeko(mFile, 0, SEEK_SET);
+ header.s_riff = (mOffset - 8);
+ header.data1 = (0x5E7F6D41);
+ header.data2 = (0xB115);
+ header.data3 = (0x11D0);
+ header.data4[0] = 0xBA;
+ header.data4[1] = 0x91;
+ header.data4[2] = 0x00;
+ header.data4[3] = 0x80;
+ header.data4[4] = 0x5F;
+ header.data4[5] = 0xB4;
+ header.data4[6] = 0xB9;
+ header.data4[7] = 0x7E;
+ header.ver = (0x0002);
+ memcpy(header.name, "Qcelp 13K", 9);
+ header.abps = (13000);
+ header.bytes_per_pkt = (35);
+ header.vr_num_of_rates = 5;
+ header.vr_bytes_per_pkt[0] = (0x0422);
+ header.vr_bytes_per_pkt[1] = (0x0310);
+ header.vr_bytes_per_pkt[2] = (0x0207);
+ header.vr_bytes_per_pkt[3] = (0x0103);
+ header.s_vrat = (0x00000008);
+ header.v_rate = (0x00000001);
+ header.size_in_pkts = (mOffset - sizeof( struct QCPEVRCHeader ))/ header.bytes_per_pkt;
+ header.s_data = mOffset - sizeof( struct QCPEVRCHeader );
+ fwrite( &header, 1, sizeof( struct QCPEVRCHeader ), mFile );
+ return OK;
+}
+
+status_t ExtendedWriter::writeEVRCHeader() {
+ /* Common part */
+ struct QCPEVRCHeader header = {
+ {'R', 'I', 'F', 'F'}, 0, {'Q', 'L', 'C', 'M'}, /* Riff */
+ {'f', 'm', 't', ' '}, 150, 1, 0, 0, 0, 0,{0}, 0, {0},0,0,160,8000,16,0,{0},{0},{0}, /* Fmt */
+ {'v','r','a','t'}, 0, 0, 0, /* Vrat */
+ {'d','a','t','a'},0 /* Data */
+ };
+
+ fseeko(mFile, 0, SEEK_SET);
+ header.s_riff = (mOffset - 8);
+ header.data1 = (0xe689d48d);
+ header.data2 = (0x9076);
+ header.data3 = (0x46b5);
+ header.data4[0] = 0x91;
+ header.data4[1] = 0xef;
+ header.data4[2] = 0x73;
+ header.data4[3] = 0x6a;
+ header.data4[4] = 0x51;
+ header.data4[5] = 0x00;
+ header.data4[6] = 0xce;
+ header.data4[7] = 0xb4;
+ header.ver = (0x0001);
+ memcpy(header.name, "TIA IS-127 Enhanced Variable Rate Codec, Speech Service Option 3", 64);
+ header.abps = (9600);
+ header.bytes_per_pkt = (23);
+ header.vr_num_of_rates = 4;
+ header.vr_bytes_per_pkt[0] = (0x0416);
+ header.vr_bytes_per_pkt[1] = (0x030a);
+ header.vr_bytes_per_pkt[2] = (0x0200);
+ header.vr_bytes_per_pkt[3] = (0x0102);
+ header.s_vrat = (0x00000008);
+ header.v_rate = (0x00000001);
+ header.size_in_pkts = (mOffset - sizeof( struct QCPEVRCHeader )) / header.bytes_per_pkt;
+ header.s_data = mOffset - sizeof( struct QCPEVRCHeader );
+ fwrite( &header, 1, sizeof( struct QCPEVRCHeader ), mFile );
+ return OK;
+}
+
+
+} // namespace android
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