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134 lines
3.9 KiB
134 lines
3.9 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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#ifndef ANOTHER_PACKET_SOURCE_H_
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#define ANOTHER_PACKET_SOURCE_H_
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#include <media/stagefright/MediaSource.h>
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#include <media/stagefright/foundation/ABase.h>
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#include <utils/threads.h>
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#include <utils/List.h>
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#include "ATSParser.h"
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namespace android {
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struct ABuffer;
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struct AnotherPacketSource : public MediaSource {
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explicit AnotherPacketSource(const sp<MetaData> &meta);
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void setFormat(const sp<MetaData> &meta);
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virtual status_t start(MetaData *params = NULL);
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virtual status_t stop();
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virtual sp<MetaData> getFormat();
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virtual status_t read(
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MediaBufferBase **buffer, const ReadOptions *options = NULL);
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void clear();
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// Returns true if we have any packets including discontinuities
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bool hasBufferAvailable(status_t *finalResult);
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// Returns true if we have packets that's not discontinuities
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bool hasDataBufferAvailable(status_t *finalResult);
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// Returns the number of available buffers. finalResult is always OK
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// if this method returns non-0, or the final result if it returns 0.
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size_t getAvailableBufferCount(status_t *finalResult);
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// Returns the difference between the last and the first queued
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// presentation timestamps since the last discontinuity (if any).
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int64_t getBufferedDurationUs(status_t *finalResult);
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// Returns the difference between the two largest timestamps queued
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int64_t getEstimatedBufferDurationUs();
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status_t nextBufferTime(int64_t *timeUs);
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void queueAccessUnit(const sp<ABuffer> &buffer);
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void queueDiscontinuity(
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ATSParser::DiscontinuityType type,
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const sp<AMessage> &extra,
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bool discard);
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void signalEOS(status_t result);
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status_t dequeueAccessUnit(sp<ABuffer> *buffer);
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void requeueAccessUnit(const sp<ABuffer> &buffer);
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bool isFinished(int64_t duration) const;
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void enable(bool enable);
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sp<AMessage> getLatestEnqueuedMeta();
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sp<AMessage> getLatestDequeuedMeta();
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sp<AMessage> getMetaAfterLastDequeued(int64_t delayUs);
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void trimBuffersAfterMeta(const sp<AMessage> &meta);
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sp<AMessage> trimBuffersBeforeMeta(const sp<AMessage> &meta);
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protected:
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virtual ~AnotherPacketSource();
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private:
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struct DiscontinuitySegment {
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int64_t mMaxDequeTimeUs, mMaxEnqueTimeUs;
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DiscontinuitySegment()
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: mMaxDequeTimeUs(-1),
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mMaxEnqueTimeUs(-1) {
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};
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void clear() {
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mMaxDequeTimeUs = mMaxEnqueTimeUs = -1;
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}
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};
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// Discontinuity segments are consecutive access units between
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// discontinuity markers. There should always be at least _ONE_
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// discontinuity segment, hence the various CHECKs in
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// AnotherPacketSource.cpp for non-empty()-ness.
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List<DiscontinuitySegment> mDiscontinuitySegments;
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Mutex mLock;
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Condition mCondition;
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bool mIsAudio;
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bool mIsVideo;
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bool mEnabled;
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sp<MetaData> mFormat;
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int64_t mLastQueuedTimeUs;
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int64_t mEstimatedBufferDurationUs;
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List<sp<ABuffer> > mBuffers;
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status_t mEOSResult;
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sp<AMessage> mLatestEnqueuedMeta;
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sp<AMessage> mLatestDequeuedMeta;
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bool wasFormatChange(int32_t discontinuityType) const;
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DISALLOW_EVIL_CONSTRUCTORS(AnotherPacketSource);
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};
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} // namespace android
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#endif // ANOTHER_PACKET_SOURCE_H_
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