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/*
* Copyright 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.
*/
#ifndef TS_PACKETIZER_H_
#define TS_PACKETIZER_H_
#include <media/stagefright/foundation/ABase.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
#include <utils/Vector.h>
namespace android {
struct ABuffer;
struct AMessage;
// Forms the packets of a transport stream given access units.
// Emits metadata tables (PAT and PMT) and timestamp stream (PCR) based
// on flags.
struct TSPacketizer : public RefBase {
TSPacketizer();
// Returns trackIndex or error.
ssize_t addTrack(const sp<AMessage> &format);
enum {
EMIT_PAT_AND_PMT = 1,
EMIT_PCR = 2,
IS_ENCRYPTED = 4,
PREPEND_SPS_PPS_TO_IDR_FRAMES = 8,
};
status_t packetize(
size_t trackIndex, const sp<ABuffer> &accessUnit,
sp<ABuffer> *packets,
uint32_t flags,
const uint8_t *PES_private_data, size_t PES_private_data_len);
// XXX to be removed once encoder config option takes care of this for
// encrypted mode.
sp<ABuffer> prependCSD(
size_t trackIndex, const sp<ABuffer> &accessUnit) const;
protected:
virtual ~TSPacketizer();
private:
enum {
kPID_PMT = 0x100,
kPID_PCR = 0x1000,
};
struct Track;
Vector<sp<Track> > mTracks;
unsigned mPATContinuityCounter;
unsigned mPMTContinuityCounter;
uint32_t mCrcTable[256];
void initCrcTable();
uint32_t crc32(const uint8_t *start, size_t size) const;
DISALLOW_EVIL_CONSTRUCTORS(TSPacketizer);
};
} // namespace android
#endif // TS_PACKETIZER_H_
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