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/*
* Copyright (C) 2012 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.
*/
#include "MP4Source.h"
#include "FragmentedMP4Parser.h"
#include "../NuPlayerStreamListener.h"
#include <media/IStreamSource.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/MediaErrors.h>
#include <media/stagefright/MetaData.h>
namespace android {
struct StreamSource : public FragmentedMP4Parser::Source {
StreamSource(const sp<IStreamSource> &source)
: mListener(new NuPlayer::NuPlayerStreamListener(source, 0)),
mPosition(0) {
mListener->start();
}
virtual ssize_t readAt(off64_t offset, void *data, size_t size) {
if (offset < mPosition) {
return -EPIPE;
}
while (offset > mPosition) {
char buffer[1024];
off64_t skipBytes = offset - mPosition;
if (skipBytes > sizeof(buffer)) {
skipBytes = sizeof(buffer);
}
sp<AMessage> extra;
ssize_t n;
for (;;) {
n = mListener->read(buffer, skipBytes, &extra);
if (n == -EWOULDBLOCK) {
usleep(10000);
continue;
}
break;
}
ALOGV("skipped %ld bytes at offset %lld", n, mPosition);
if (n < 0) {
return n;
}
mPosition += n;
}
sp<AMessage> extra;
size_t total = 0;
while (total < size) {
ssize_t n = mListener->read(
(uint8_t *)data + total, size - total, &extra);
if (n == -EWOULDBLOCK) {
usleep(10000);
continue;
} else if (n == 0) {
break;
} else if (n < 0) {
mPosition += total;
return n;
}
total += n;
}
ALOGV("read %ld bytes at offset %lld", n, mPosition);
mPosition += total;
return total;
}
bool isSeekable() {
return false;
}
private:
sp<NuPlayer::NuPlayerStreamListener> mListener;
off64_t mPosition;
DISALLOW_EVIL_CONSTRUCTORS(StreamSource);
};
MP4Source::MP4Source(const sp<IStreamSource> &source)
: mSource(source),
mLooper(new ALooper),
mParser(new FragmentedMP4Parser),
mEOS(false) {
mLooper->registerHandler(mParser);
}
MP4Source::~MP4Source() {
}
void MP4Source::start() {
mLooper->start(false /* runOnCallingThread */);
mParser->start(new StreamSource(mSource));
}
status_t MP4Source::feedMoreTSData() {
return mEOS ? ERROR_END_OF_STREAM : (status_t)OK;
}
sp<AMessage> MP4Source::getFormat(bool audio) {
return mParser->getFormat(audio);
}
status_t MP4Source::dequeueAccessUnit(
bool audio, sp<ABuffer> *accessUnit) {
return mParser->dequeueAccessUnit(audio, accessUnit);
}
uint32_t MP4Source::flags() const {
return 0;
}
} // namespace android
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