| /* |
| * 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 "ATSParser" |
| #include <utils/Log.h> |
| |
| #include "ATSParser.h" |
| |
| #include "AnotherPacketSource.h" |
| #include "ESQueue.h" |
| #include "include/avc_utils.h" |
| |
| #include <media/stagefright/foundation/ABitReader.h> |
| #include <media/stagefright/foundation/ABuffer.h> |
| #include <media/stagefright/foundation/ADebug.h> |
| #include <media/stagefright/foundation/AMessage.h> |
| #include <media/stagefright/foundation/hexdump.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MediaErrors.h> |
| #include <media/stagefright/MetaData.h> |
| #include <utils/KeyedVector.h> |
| |
| namespace android { |
| |
| // I want the expression "y" evaluated even if verbose logging is off. |
| #define MY_LOGV(x, y) \ |
| do { unsigned tmp = y; LOGV(x, tmp); } while (0) |
| |
| static const size_t kTSPacketSize = 188; |
| |
| struct ATSParser::Program : public RefBase { |
| Program(ATSParser *parser, unsigned programMapPID); |
| |
| bool parsePID( |
| unsigned pid, unsigned payload_unit_start_indicator, |
| ABitReader *br); |
| |
| void signalDiscontinuity(DiscontinuityType type); |
| void signalEOS(status_t finalResult); |
| |
| sp<MediaSource> getSource(SourceType type); |
| |
| int64_t convertPTSToTimestamp(uint64_t PTS); |
| |
| bool PTSTimeDeltaEstablished() const { |
| return mFirstPTSValid; |
| } |
| |
| private: |
| ATSParser *mParser; |
| unsigned mProgramMapPID; |
| KeyedVector<unsigned, sp<Stream> > mStreams; |
| bool mFirstPTSValid; |
| uint64_t mFirstPTS; |
| |
| void parseProgramMap(ABitReader *br); |
| |
| DISALLOW_EVIL_CONSTRUCTORS(Program); |
| }; |
| |
| struct ATSParser::Stream : public RefBase { |
| Stream(Program *program, unsigned elementaryPID, unsigned streamType); |
| |
| unsigned type() const { return mStreamType; } |
| unsigned pid() const { return mElementaryPID; } |
| void setPID(unsigned pid) { mElementaryPID = pid; } |
| |
| void parse( |
| unsigned payload_unit_start_indicator, |
| ABitReader *br); |
| |
| void signalDiscontinuity(DiscontinuityType type); |
| void signalEOS(status_t finalResult); |
| |
| sp<MediaSource> getSource(SourceType type); |
| |
| protected: |
| virtual ~Stream(); |
| |
| private: |
| Program *mProgram; |
| unsigned mElementaryPID; |
| unsigned mStreamType; |
| |
| sp<ABuffer> mBuffer; |
| sp<AnotherPacketSource> mSource; |
| bool mPayloadStarted; |
| DiscontinuityType mPendingDiscontinuity; |
| |
| ElementaryStreamQueue mQueue; |
| |
| void flush(); |
| void parsePES(ABitReader *br); |
| |
| void onPayloadData( |
| unsigned PTS_DTS_flags, uint64_t PTS, uint64_t DTS, |
| const uint8_t *data, size_t size); |
| |
| void extractAACFrames(const sp<ABuffer> &buffer); |
| |
| void deferDiscontinuity(DiscontinuityType type); |
| |
| DISALLOW_EVIL_CONSTRUCTORS(Stream); |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::Program::Program(ATSParser *parser, unsigned programMapPID) |
| : mParser(parser), |
| mProgramMapPID(programMapPID), |
| mFirstPTSValid(false), |
| mFirstPTS(0) { |
| } |
| |
| bool ATSParser::Program::parsePID( |
| unsigned pid, unsigned payload_unit_start_indicator, |
| ABitReader *br) { |
| if (pid == mProgramMapPID) { |
| if (payload_unit_start_indicator) { |
| unsigned skip = br->getBits(8); |
| br->skipBits(skip * 8); |
| } |
| |
| parseProgramMap(br); |
| return true; |
| } |
| |
| ssize_t index = mStreams.indexOfKey(pid); |
| if (index < 0) { |
| return false; |
| } |
| |
| mStreams.editValueAt(index)->parse( |
| payload_unit_start_indicator, br); |
| |
| return true; |
| } |
| |
| void ATSParser::Program::signalDiscontinuity(DiscontinuityType type) { |
| for (size_t i = 0; i < mStreams.size(); ++i) { |
| mStreams.editValueAt(i)->signalDiscontinuity(type); |
| } |
| } |
| |
| void ATSParser::Program::signalEOS(status_t finalResult) { |
| for (size_t i = 0; i < mStreams.size(); ++i) { |
| mStreams.editValueAt(i)->signalEOS(finalResult); |
| } |
| } |
| |
| struct StreamInfo { |
| unsigned mType; |
| unsigned mPID; |
| }; |
| |
| void ATSParser::Program::parseProgramMap(ABitReader *br) { |
| unsigned table_id = br->getBits(8); |
| LOGV(" table_id = %u", table_id); |
| CHECK_EQ(table_id, 0x02u); |
| |
| unsigned section_syntax_indicator = br->getBits(1); |
| LOGV(" section_syntax_indicator = %u", section_syntax_indicator); |
| CHECK_EQ(section_syntax_indicator, 1u); |
| |
| CHECK_EQ(br->getBits(1), 0u); |
| MY_LOGV(" reserved = %u", br->getBits(2)); |
| |
| unsigned section_length = br->getBits(12); |
| LOGV(" section_length = %u", section_length); |
| CHECK_EQ(section_length & 0xc00, 0u); |
| CHECK_LE(section_length, 1021u); |
| |
| MY_LOGV(" program_number = %u", br->getBits(16)); |
| MY_LOGV(" reserved = %u", br->getBits(2)); |
| MY_LOGV(" version_number = %u", br->getBits(5)); |
| MY_LOGV(" current_next_indicator = %u", br->getBits(1)); |
| MY_LOGV(" section_number = %u", br->getBits(8)); |
| MY_LOGV(" last_section_number = %u", br->getBits(8)); |
| MY_LOGV(" reserved = %u", br->getBits(3)); |
| MY_LOGV(" PCR_PID = 0x%04x", br->getBits(13)); |
| MY_LOGV(" reserved = %u", br->getBits(4)); |
| |
| unsigned program_info_length = br->getBits(12); |
| LOGV(" program_info_length = %u", program_info_length); |
| CHECK_EQ(program_info_length & 0xc00, 0u); |
| |
| br->skipBits(program_info_length * 8); // skip descriptors |
| |
| Vector<StreamInfo> infos; |
| |
| // infoBytesRemaining is the number of bytes that make up the |
| // variable length section of ES_infos. It does not include the |
| // final CRC. |
| size_t infoBytesRemaining = section_length - 9 - program_info_length - 4; |
| |
| while (infoBytesRemaining > 0) { |
| CHECK_GE(infoBytesRemaining, 5u); |
| |
| unsigned streamType = br->getBits(8); |
| LOGV(" stream_type = 0x%02x", streamType); |
| |
| MY_LOGV(" reserved = %u", br->getBits(3)); |
| |
| unsigned elementaryPID = br->getBits(13); |
| LOGV(" elementary_PID = 0x%04x", elementaryPID); |
| |
| MY_LOGV(" reserved = %u", br->getBits(4)); |
| |
| unsigned ES_info_length = br->getBits(12); |
| LOGV(" ES_info_length = %u", ES_info_length); |
| CHECK_EQ(ES_info_length & 0xc00, 0u); |
| |
| CHECK_GE(infoBytesRemaining - 5, ES_info_length); |
| |
| #if 0 |
| br->skipBits(ES_info_length * 8); // skip descriptors |
| #else |
| unsigned info_bytes_remaining = ES_info_length; |
| while (info_bytes_remaining >= 2) { |
| MY_LOGV(" tag = 0x%02x", br->getBits(8)); |
| |
| unsigned descLength = br->getBits(8); |
| LOGV(" len = %u", descLength); |
| |
| CHECK_GE(info_bytes_remaining, 2 + descLength); |
| |
| br->skipBits(descLength * 8); |
| |
| info_bytes_remaining -= descLength + 2; |
| } |
| CHECK_EQ(info_bytes_remaining, 0u); |
| #endif |
| |
| StreamInfo info; |
| info.mType = streamType; |
| info.mPID = elementaryPID; |
| infos.push(info); |
| |
| infoBytesRemaining -= 5 + ES_info_length; |
| } |
| |
| CHECK_EQ(infoBytesRemaining, 0u); |
| MY_LOGV(" CRC = 0x%08x", br->getBits(32)); |
| |
| bool PIDsChanged = false; |
| for (size_t i = 0; i < infos.size(); ++i) { |
| StreamInfo &info = infos.editItemAt(i); |
| |
| ssize_t index = mStreams.indexOfKey(info.mPID); |
| |
| if (index >= 0 && mStreams.editValueAt(index)->type() != info.mType) { |
| LOGI("uh oh. stream PIDs have changed."); |
| PIDsChanged = true; |
| break; |
| } |
| } |
| |
| if (PIDsChanged) { |
| mStreams.clear(); |
| } |
| |
| for (size_t i = 0; i < infos.size(); ++i) { |
| StreamInfo &info = infos.editItemAt(i); |
| |
| ssize_t index = mStreams.indexOfKey(info.mPID); |
| |
| if (index < 0) { |
| sp<Stream> stream = new Stream(this, info.mPID, info.mType); |
| mStreams.add(info.mPID, stream); |
| |
| if (PIDsChanged) { |
| stream->signalDiscontinuity(DISCONTINUITY_FORMATCHANGE); |
| } |
| } |
| } |
| } |
| |
| sp<MediaSource> ATSParser::Program::getSource(SourceType type) { |
| size_t index = (type == MPEG2ADTS_AUDIO) ? 0 : 0; |
| |
| for (size_t i = 0; i < mStreams.size(); ++i) { |
| sp<MediaSource> source = mStreams.editValueAt(i)->getSource(type); |
| if (source != NULL) { |
| if (index == 0) { |
| return source; |
| } |
| --index; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| int64_t ATSParser::Program::convertPTSToTimestamp(uint64_t PTS) { |
| if (!mFirstPTSValid) { |
| mFirstPTSValid = true; |
| mFirstPTS = PTS; |
| PTS = 0; |
| } else if (PTS < mFirstPTS) { |
| PTS = 0; |
| } else { |
| PTS -= mFirstPTS; |
| } |
| |
| return (PTS * 100) / 9; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::Stream::Stream( |
| Program *program, unsigned elementaryPID, unsigned streamType) |
| : mProgram(program), |
| mElementaryPID(elementaryPID), |
| mStreamType(streamType), |
| mBuffer(new ABuffer(192 * 1024)), |
| mPayloadStarted(false), |
| mPendingDiscontinuity(DISCONTINUITY_NONE), |
| mQueue(streamType == 0x1b |
| ? ElementaryStreamQueue::H264 : ElementaryStreamQueue::AAC) { |
| mBuffer->setRange(0, 0); |
| |
| LOGV("new stream PID 0x%02x, type 0x%02x", elementaryPID, streamType); |
| } |
| |
| ATSParser::Stream::~Stream() { |
| } |
| |
| void ATSParser::Stream::parse( |
| unsigned payload_unit_start_indicator, ABitReader *br) { |
| if (payload_unit_start_indicator) { |
| if (mPayloadStarted) { |
| // Otherwise we run the danger of receiving the trailing bytes |
| // of a PES packet that we never saw the start of and assuming |
| // we have a a complete PES packet. |
| |
| flush(); |
| } |
| |
| mPayloadStarted = true; |
| } |
| |
| if (!mPayloadStarted) { |
| return; |
| } |
| |
| size_t payloadSizeBits = br->numBitsLeft(); |
| CHECK_EQ(payloadSizeBits % 8, 0u); |
| |
| CHECK_LE(mBuffer->size() + payloadSizeBits / 8, mBuffer->capacity()); |
| |
| memcpy(mBuffer->data() + mBuffer->size(), br->data(), payloadSizeBits / 8); |
| mBuffer->setRange(0, mBuffer->size() + payloadSizeBits / 8); |
| } |
| |
| void ATSParser::Stream::signalDiscontinuity(DiscontinuityType type) { |
| mPayloadStarted = false; |
| mBuffer->setRange(0, 0); |
| |
| switch (type) { |
| case DISCONTINUITY_SEEK: |
| case DISCONTINUITY_FORMATCHANGE: |
| { |
| bool isASeek = (type == DISCONTINUITY_SEEK); |
| |
| mQueue.clear(!isASeek); |
| |
| if (mSource != NULL) { |
| mSource->queueDiscontinuity(type); |
| } else { |
| deferDiscontinuity(type); |
| } |
| break; |
| } |
| |
| default: |
| TRESPASS(); |
| break; |
| } |
| } |
| |
| void ATSParser::Stream::deferDiscontinuity(DiscontinuityType type) { |
| if (type > mPendingDiscontinuity) { |
| // Only upgrade discontinuities. |
| mPendingDiscontinuity = type; |
| } |
| } |
| |
| void ATSParser::Stream::signalEOS(status_t finalResult) { |
| if (mSource != NULL) { |
| mSource->signalEOS(finalResult); |
| } |
| } |
| |
| void ATSParser::Stream::parsePES(ABitReader *br) { |
| unsigned packet_startcode_prefix = br->getBits(24); |
| |
| LOGV("packet_startcode_prefix = 0x%08x", packet_startcode_prefix); |
| |
| CHECK_EQ(packet_startcode_prefix, 0x000001u); |
| |
| unsigned stream_id = br->getBits(8); |
| LOGV("stream_id = 0x%02x", stream_id); |
| |
| unsigned PES_packet_length = br->getBits(16); |
| LOGV("PES_packet_length = %u", PES_packet_length); |
| |
| if (stream_id != 0xbc // program_stream_map |
| && stream_id != 0xbe // padding_stream |
| && stream_id != 0xbf // private_stream_2 |
| && stream_id != 0xf0 // ECM |
| && stream_id != 0xf1 // EMM |
| && stream_id != 0xff // program_stream_directory |
| && stream_id != 0xf2 // DSMCC |
| && stream_id != 0xf8) { // H.222.1 type E |
| CHECK_EQ(br->getBits(2), 2u); |
| |
| MY_LOGV("PES_scrambling_control = %u", br->getBits(2)); |
| MY_LOGV("PES_priority = %u", br->getBits(1)); |
| MY_LOGV("data_alignment_indicator = %u", br->getBits(1)); |
| MY_LOGV("copyright = %u", br->getBits(1)); |
| MY_LOGV("original_or_copy = %u", br->getBits(1)); |
| |
| unsigned PTS_DTS_flags = br->getBits(2); |
| LOGV("PTS_DTS_flags = %u", PTS_DTS_flags); |
| |
| unsigned ESCR_flag = br->getBits(1); |
| LOGV("ESCR_flag = %u", ESCR_flag); |
| |
| unsigned ES_rate_flag = br->getBits(1); |
| LOGV("ES_rate_flag = %u", ES_rate_flag); |
| |
| unsigned DSM_trick_mode_flag = br->getBits(1); |
| LOGV("DSM_trick_mode_flag = %u", DSM_trick_mode_flag); |
| |
| unsigned additional_copy_info_flag = br->getBits(1); |
| LOGV("additional_copy_info_flag = %u", additional_copy_info_flag); |
| |
| MY_LOGV("PES_CRC_flag = %u", br->getBits(1)); |
| MY_LOGV("PES_extension_flag = %u", br->getBits(1)); |
| |
| unsigned PES_header_data_length = br->getBits(8); |
| LOGV("PES_header_data_length = %u", PES_header_data_length); |
| |
| unsigned optional_bytes_remaining = PES_header_data_length; |
| |
| uint64_t PTS = 0, DTS = 0; |
| |
| if (PTS_DTS_flags == 2 || PTS_DTS_flags == 3) { |
| CHECK_GE(optional_bytes_remaining, 5u); |
| |
| CHECK_EQ(br->getBits(4), PTS_DTS_flags); |
| |
| PTS = ((uint64_t)br->getBits(3)) << 30; |
| CHECK_EQ(br->getBits(1), 1u); |
| PTS |= ((uint64_t)br->getBits(15)) << 15; |
| CHECK_EQ(br->getBits(1), 1u); |
| PTS |= br->getBits(15); |
| CHECK_EQ(br->getBits(1), 1u); |
| |
| LOGV("PTS = %llu", PTS); |
| // LOGI("PTS = %.2f secs", PTS / 90000.0f); |
| |
| optional_bytes_remaining -= 5; |
| |
| if (PTS_DTS_flags == 3) { |
| CHECK_GE(optional_bytes_remaining, 5u); |
| |
| CHECK_EQ(br->getBits(4), 1u); |
| |
| DTS = ((uint64_t)br->getBits(3)) << 30; |
| CHECK_EQ(br->getBits(1), 1u); |
| DTS |= ((uint64_t)br->getBits(15)) << 15; |
| CHECK_EQ(br->getBits(1), 1u); |
| DTS |= br->getBits(15); |
| CHECK_EQ(br->getBits(1), 1u); |
| |
| LOGV("DTS = %llu", DTS); |
| |
| optional_bytes_remaining -= 5; |
| } |
| } |
| |
| if (ESCR_flag) { |
| CHECK_GE(optional_bytes_remaining, 6u); |
| |
| br->getBits(2); |
| |
| uint64_t ESCR = ((uint64_t)br->getBits(3)) << 30; |
| CHECK_EQ(br->getBits(1), 1u); |
| ESCR |= ((uint64_t)br->getBits(15)) << 15; |
| CHECK_EQ(br->getBits(1), 1u); |
| ESCR |= br->getBits(15); |
| CHECK_EQ(br->getBits(1), 1u); |
| |
| LOGV("ESCR = %llu", ESCR); |
| MY_LOGV("ESCR_extension = %u", br->getBits(9)); |
| |
| CHECK_EQ(br->getBits(1), 1u); |
| |
| optional_bytes_remaining -= 6; |
| } |
| |
| if (ES_rate_flag) { |
| CHECK_GE(optional_bytes_remaining, 3u); |
| |
| CHECK_EQ(br->getBits(1), 1u); |
| MY_LOGV("ES_rate = %u", br->getBits(22)); |
| CHECK_EQ(br->getBits(1), 1u); |
| |
| optional_bytes_remaining -= 3; |
| } |
| |
| br->skipBits(optional_bytes_remaining * 8); |
| |
| // ES data follows. |
| |
| if (PES_packet_length != 0) { |
| CHECK_GE(PES_packet_length, PES_header_data_length + 3); |
| |
| unsigned dataLength = |
| PES_packet_length - 3 - PES_header_data_length; |
| |
| CHECK_GE(br->numBitsLeft(), dataLength * 8); |
| |
| onPayloadData( |
| PTS_DTS_flags, PTS, DTS, br->data(), dataLength); |
| |
| br->skipBits(dataLength * 8); |
| } else { |
| onPayloadData( |
| PTS_DTS_flags, PTS, DTS, |
| br->data(), br->numBitsLeft() / 8); |
| |
| size_t payloadSizeBits = br->numBitsLeft(); |
| CHECK_EQ(payloadSizeBits % 8, 0u); |
| |
| LOGV("There's %d bytes of payload.", payloadSizeBits / 8); |
| } |
| } else if (stream_id == 0xbe) { // padding_stream |
| CHECK_NE(PES_packet_length, 0u); |
| br->skipBits(PES_packet_length * 8); |
| } else { |
| CHECK_NE(PES_packet_length, 0u); |
| br->skipBits(PES_packet_length * 8); |
| } |
| } |
| |
| void ATSParser::Stream::flush() { |
| if (mBuffer->size() == 0) { |
| return; |
| } |
| |
| LOGV("flushing stream 0x%04x size = %d", mElementaryPID, mBuffer->size()); |
| |
| ABitReader br(mBuffer->data(), mBuffer->size()); |
| parsePES(&br); |
| |
| mBuffer->setRange(0, 0); |
| } |
| |
| void ATSParser::Stream::onPayloadData( |
| unsigned PTS_DTS_flags, uint64_t PTS, uint64_t DTS, |
| const uint8_t *data, size_t size) { |
| LOGV("onPayloadData mStreamType=0x%02x", mStreamType); |
| |
| CHECK(PTS_DTS_flags == 2 || PTS_DTS_flags == 3); |
| int64_t timeUs = mProgram->convertPTSToTimestamp(PTS); |
| |
| status_t err = mQueue.appendData(data, size, timeUs); |
| |
| if (err != OK) { |
| return; |
| } |
| |
| sp<ABuffer> accessUnit; |
| while ((accessUnit = mQueue.dequeueAccessUnit()) != NULL) { |
| if (mSource == NULL) { |
| sp<MetaData> meta = mQueue.getFormat(); |
| |
| if (meta != NULL) { |
| LOGV("created source!"); |
| mSource = new AnotherPacketSource(meta); |
| |
| if (mPendingDiscontinuity != DISCONTINUITY_NONE) { |
| mSource->queueDiscontinuity(mPendingDiscontinuity); |
| mPendingDiscontinuity = DISCONTINUITY_NONE; |
| } |
| |
| mSource->queueAccessUnit(accessUnit); |
| } |
| } else if (mQueue.getFormat() != NULL) { |
| // After a discontinuity we invalidate the queue's format |
| // and won't enqueue any access units to the source until |
| // the queue has reestablished the new format. |
| |
| if (mSource->getFormat() == NULL) { |
| mSource->setFormat(mQueue.getFormat()); |
| } |
| mSource->queueAccessUnit(accessUnit); |
| } |
| } |
| } |
| |
| sp<MediaSource> ATSParser::Stream::getSource(SourceType type) { |
| if ((type == AVC_VIDEO && mStreamType == 0x1b) |
| || (type == MPEG2ADTS_AUDIO && mStreamType == 0x0f)) { |
| return mSource; |
| } |
| |
| return NULL; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::ATSParser() { |
| } |
| |
| ATSParser::~ATSParser() { |
| } |
| |
| void ATSParser::feedTSPacket(const void *data, size_t size) { |
| CHECK_EQ(size, kTSPacketSize); |
| |
| ABitReader br((const uint8_t *)data, kTSPacketSize); |
| parseTS(&br); |
| } |
| |
| void ATSParser::signalDiscontinuity(DiscontinuityType type) { |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| mPrograms.editItemAt(i)->signalDiscontinuity(type); |
| } |
| } |
| |
| void ATSParser::signalEOS(status_t finalResult) { |
| CHECK_NE(finalResult, (status_t)OK); |
| |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| mPrograms.editItemAt(i)->signalEOS(finalResult); |
| } |
| } |
| |
| void ATSParser::parseProgramAssociationTable(ABitReader *br) { |
| unsigned table_id = br->getBits(8); |
| LOGV(" table_id = %u", table_id); |
| CHECK_EQ(table_id, 0x00u); |
| |
| unsigned section_syntax_indictor = br->getBits(1); |
| LOGV(" section_syntax_indictor = %u", section_syntax_indictor); |
| CHECK_EQ(section_syntax_indictor, 1u); |
| |
| CHECK_EQ(br->getBits(1), 0u); |
| MY_LOGV(" reserved = %u", br->getBits(2)); |
| |
| unsigned section_length = br->getBits(12); |
| LOGV(" section_length = %u", section_length); |
| CHECK_EQ(section_length & 0xc00, 0u); |
| |
| MY_LOGV(" transport_stream_id = %u", br->getBits(16)); |
| MY_LOGV(" reserved = %u", br->getBits(2)); |
| MY_LOGV(" version_number = %u", br->getBits(5)); |
| MY_LOGV(" current_next_indicator = %u", br->getBits(1)); |
| MY_LOGV(" section_number = %u", br->getBits(8)); |
| MY_LOGV(" last_section_number = %u", br->getBits(8)); |
| |
| size_t numProgramBytes = (section_length - 5 /* header */ - 4 /* crc */); |
| CHECK_EQ((numProgramBytes % 4), 0u); |
| |
| for (size_t i = 0; i < numProgramBytes / 4; ++i) { |
| unsigned program_number = br->getBits(16); |
| LOGV(" program_number = %u", program_number); |
| |
| MY_LOGV(" reserved = %u", br->getBits(3)); |
| |
| if (program_number == 0) { |
| MY_LOGV(" network_PID = 0x%04x", br->getBits(13)); |
| } else { |
| unsigned programMapPID = br->getBits(13); |
| |
| LOGV(" program_map_PID = 0x%04x", programMapPID); |
| |
| mPrograms.push(new Program(this, programMapPID)); |
| } |
| } |
| |
| MY_LOGV(" CRC = 0x%08x", br->getBits(32)); |
| } |
| |
| void ATSParser::parsePID( |
| ABitReader *br, unsigned PID, |
| unsigned payload_unit_start_indicator) { |
| if (PID == 0) { |
| if (payload_unit_start_indicator) { |
| unsigned skip = br->getBits(8); |
| br->skipBits(skip * 8); |
| } |
| parseProgramAssociationTable(br); |
| return; |
| } |
| |
| bool handled = false; |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| if (mPrograms.editItemAt(i)->parsePID( |
| PID, payload_unit_start_indicator, br)) { |
| handled = true; |
| break; |
| } |
| } |
| |
| if (!handled) { |
| LOGV("PID 0x%04x not handled.", PID); |
| } |
| } |
| |
| void ATSParser::parseAdaptationField(ABitReader *br) { |
| unsigned adaptation_field_length = br->getBits(8); |
| if (adaptation_field_length > 0) { |
| br->skipBits(adaptation_field_length * 8); // XXX |
| } |
| } |
| |
| void ATSParser::parseTS(ABitReader *br) { |
| LOGV("---"); |
| |
| unsigned sync_byte = br->getBits(8); |
| CHECK_EQ(sync_byte, 0x47u); |
| |
| MY_LOGV("transport_error_indicator = %u", br->getBits(1)); |
| |
| unsigned payload_unit_start_indicator = br->getBits(1); |
| LOGV("payload_unit_start_indicator = %u", payload_unit_start_indicator); |
| |
| MY_LOGV("transport_priority = %u", br->getBits(1)); |
| |
| unsigned PID = br->getBits(13); |
| LOGV("PID = 0x%04x", PID); |
| |
| MY_LOGV("transport_scrambling_control = %u", br->getBits(2)); |
| |
| unsigned adaptation_field_control = br->getBits(2); |
| LOGV("adaptation_field_control = %u", adaptation_field_control); |
| |
| unsigned continuity_counter = br->getBits(4); |
| LOGV("continuity_counter = %u", continuity_counter); |
| |
| // LOGI("PID = 0x%04x, continuity_counter = %u", PID, continuity_counter); |
| |
| if (adaptation_field_control == 2 || adaptation_field_control == 3) { |
| parseAdaptationField(br); |
| } |
| |
| if (adaptation_field_control == 1 || adaptation_field_control == 3) { |
| parsePID(br, PID, payload_unit_start_indicator); |
| } |
| } |
| |
| sp<MediaSource> ATSParser::getSource(SourceType type) { |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| sp<MediaSource> source = mPrograms.editItemAt(i)->getSource(type); |
| |
| if (source != NULL) { |
| return source; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| bool ATSParser::PTSTimeDeltaEstablished() { |
| if (mPrograms.isEmpty()) { |
| return false; |
| } |
| |
| return mPrograms.editItemAt(0)->PTSTimeDeltaEstablished(); |
| } |
| |
| } // namespace android |