| /* |
| * 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 { |
| enum { |
| EMIT_HDCP20_DESCRIPTOR = 1, |
| EMIT_HDCP21_DESCRIPTOR = 2, |
| }; |
| TSPacketizer(uint32_t flags); |
| |
| // 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, |
| size_t numStuffingBytes = 0); |
| |
| status_t extractCSDIfNecessary(size_t trackIndex); |
| |
| // 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; |
| |
| uint32_t mFlags; |
| Vector<sp<Track> > mTracks; |
| |
| Vector<sp<ABuffer> > mProgramInfoDescriptors; |
| |
| 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_ |
| |