/*
* Copyright (C) 2010 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 "StreamingSource"
#include <utils/Log.h>
#include "StreamingSource.h"
#include "ATSParser.h"
#include "AnotherPacketSource.h"
#include "NuPlayerStreamListener.h"
#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/MediaSource.h>
#include <media/stagefright/MetaData.h>
namespace android {
NuPlayer::StreamingSource::StreamingSource(
const sp<AMessage> ¬ify,
const sp<IStreamSource> &source)
: Source(notify),
mSource(source),
mFinalResult(OK),
mBuffering(false) {
}
NuPlayer::StreamingSource::~StreamingSource() {
if (mLooper != NULL) {
mLooper->unregisterHandler(id());
mLooper->stop();
}
}
void NuPlayer::StreamingSource::prepareAsync() {
if (mLooper == NULL) {
mLooper = new ALooper;
mLooper->setName("streaming");
mLooper->start();
mLooper->registerHandler(this);
}
notifyVideoSizeChanged();
notifyFlagsChanged(0);
notifyPrepared();
}
void NuPlayer::StreamingSource::start() {
mStreamListener = new NuPlayerStreamListener(mSource, NULL);
uint32_t sourceFlags = mSource->flags();
uint32_t parserFlags = ATSParser::TS_TIMESTAMPS_ARE_ABSOLUTE;
if (sourceFlags & IStreamSource::kFlagAlignedVideoData) {
parserFlags |= ATSParser::ALIGNED_VIDEO_DATA;
}
mTSParser = new ATSParser(parserFlags);
mStreamListener->start();
postReadBuffer();
}
status_t NuPlayer::StreamingSource::feedMoreTSData() {
return postReadBuffer();
}
void NuPlayer::StreamingSource::onReadBuffer() {
for (int32_t i = 0; i < 50; ++i) {
char buffer[188];
sp<AMessage> extra;
ssize_t n = mStreamListener->read(buffer, sizeof(buffer), &extra);
if (n == 0) {
ALOGI("input data EOS reached.");
mTSParser->signalEOS(ERROR_END_OF_STREAM);
setError(ERROR_END_OF_STREAM);
break;
} else if (n == INFO_DISCONTINUITY) {
int32_t type = ATSParser::DISCONTINUITY_TIME;
int32_t mask;
if (extra != NULL
&& extra->findInt32(
IStreamListener::kKeyDiscontinuityMask, &mask)) {
if (mask == 0) {
ALOGE("Client specified an illegal discontinuity type.");
setError(ERROR_UNSUPPORTED);
break;
}
type = mask;
}
mTSParser->signalDiscontinuity(
(ATSParser::DiscontinuityType)type, extra);
} else if (n < 0) {
break;
} else {
if (buffer[0] == 0x00) {
// XXX legacy
if (extra == NULL) {
extra = new AMessage;
}
uint8_t type = buffer[1];
if (type & 2) {
int64_t mediaTimeUs;
memcpy(&mediaTimeUs, &buffer[2], sizeof(mediaTimeUs));
extra->setInt64(IStreamListener::kKeyMediaTimeUs, mediaTimeUs);
}
mTSParser->signalDiscontinuity(
((type & 1) == 0)
? ATSParser::DISCONTINUITY_TIME
: ATSParser::DISCONTINUITY_FORMATCHANGE,
extra);
} else {
status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer));
if (err != OK) {
ALOGE("TS Parser returned error %d", err);
mTSParser->signalEOS(err);
setError(err);
break;
}
}
}
}
}
status_t NuPlayer::StreamingSource::postReadBuffer() {
{
Mutex::Autolock _l(mBufferingLock);
if (mFinalResult != OK) {
return mFinalResult;
}
if (mBuffering) {
return OK;
}
mBuffering = true;
}
(new AMessage(kWhatReadBuffer, this))->post();
return OK;
}
bool NuPlayer::StreamingSource::haveSufficientDataOnAllTracks() {
// We're going to buffer at least 2 secs worth data on all tracks before
// starting playback (both at startup and after a seek).
static const int64_t kMinDurationUs = 2000000ll;
sp<AnotherPacketSource> audioTrack = getSource(true /*audio*/);
sp<AnotherPacketSource> videoTrack = getSource(false /*audio*/);
status_t err;
int64_t durationUs;
if (audioTrack != NULL
&& (durationUs = audioTrack->getBufferedDurationUs(&err))
< kMinDurationUs
&& err == OK) {
ALOGV("audio track doesn't have enough data yet. (%.2f secs buffered)",
durationUs / 1E6);
return false;
}
if (videoTrack != NULL
&& (durationUs = videoTrack->getBufferedDurationUs(&err))
< kMinDurationUs
&& err == OK) {
ALOGV("video track doesn't have enough data yet. (%.2f secs buffered)",
durationUs / 1E6);
return false;
}
return true;
}
void NuPlayer::StreamingSource::setError(status_t err) {
Mutex::Autolock _l(mBufferingLock);
mFinalResult = err;
}
sp<AnotherPacketSource> NuPlayer::StreamingSource::getSource(bool audio) {
if (mTSParser == NULL) {
return NULL;
}
sp<MediaSource> source = mTSParser->getSource(
audio ? ATSParser::AUDIO : ATSParser::VIDEO);
return static_cast<AnotherPacketSource *>(source.get());
}
sp<MetaData> NuPlayer::StreamingSource::getFormatMeta(bool audio) {
sp<AnotherPacketSource> source = getSource(audio);
if (source == NULL) {
return NULL;
}
return source->getFormat();
}
status_t NuPlayer::StreamingSource::dequeueAccessUnit(
bool audio, sp<ABuffer> *accessUnit) {
sp<AnotherPacketSource> source = getSource(audio);
if (source == NULL) {
return -EWOULDBLOCK;
}
if (!haveSufficientDataOnAllTracks()) {
postReadBuffer();
}
status_t finalResult;
if (!source->hasBufferAvailable(&finalResult)) {
return finalResult == OK ? -EWOULDBLOCK : finalResult;
}
status_t err = source->dequeueAccessUnit(accessUnit);
#if !defined(LOG_NDEBUG) || LOG_NDEBUG == 0
if (err == OK) {
int64_t timeUs;
CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
ALOGV("dequeueAccessUnit timeUs=%lld us", timeUs);
}
#endif
return err;
}
bool NuPlayer::StreamingSource::isRealTime() const {
return mSource->flags() & IStreamSource::kFlagIsRealTimeData;
}
void NuPlayer::StreamingSource::onMessageReceived(
const sp<AMessage> &msg) {
switch (msg->what()) {
case kWhatReadBuffer:
{
onReadBuffer();
{
Mutex::Autolock _l(mBufferingLock);
mBuffering = false;
}
break;
}
default:
{
TRESPASS();
}
}
}
} // namespace android