| /* |
| * 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 <media/stagefright/Utils.h> |
| #include <media/IStreamSource.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; ALOGV(x, tmp); } while (0) |
| |
| static const size_t kTSPacketSize = 188; |
| |
| struct ATSParser::Program : public RefBase { |
| Program(ATSParser *parser, unsigned programNumber, unsigned programMapPID); |
| |
| bool parsePSISection( |
| unsigned pid, ABitReader *br, status_t *err); |
| |
| bool parsePID( |
| unsigned pid, unsigned continuity_counter, |
| unsigned payload_unit_start_indicator, |
| ABitReader *br, status_t *err); |
| |
| void signalDiscontinuity( |
| DiscontinuityType type, const sp<AMessage> &extra); |
| |
| void signalEOS(status_t finalResult); |
| |
| sp<MediaSource> getSource(SourceType type); |
| |
| int64_t convertPTSToTimestamp(uint64_t PTS); |
| |
| bool PTSTimeDeltaEstablished() const { |
| return mFirstPTSValid; |
| } |
| |
| unsigned number() const { return mProgramNumber; } |
| |
| void updateProgramMapPID(unsigned programMapPID) { |
| mProgramMapPID = programMapPID; |
| } |
| |
| unsigned programMapPID() const { |
| return mProgramMapPID; |
| } |
| |
| uint32_t parserFlags() const { |
| return mParser->mFlags; |
| } |
| |
| private: |
| ATSParser *mParser; |
| unsigned mProgramNumber; |
| unsigned mProgramMapPID; |
| KeyedVector<unsigned, sp<Stream> > mStreams; |
| bool mFirstPTSValid; |
| uint64_t mFirstPTS; |
| |
| status_t parseProgramMap(ABitReader *br); |
| |
| DISALLOW_EVIL_CONSTRUCTORS(Program); |
| }; |
| |
| struct ATSParser::Stream : public RefBase { |
| Stream(Program *program, |
| unsigned elementaryPID, |
| unsigned streamType, |
| unsigned PCR_PID); |
| |
| unsigned type() const { return mStreamType; } |
| unsigned pid() const { return mElementaryPID; } |
| void setPID(unsigned pid) { mElementaryPID = pid; } |
| |
| status_t parse( |
| unsigned continuity_counter, |
| unsigned payload_unit_start_indicator, |
| ABitReader *br); |
| |
| void signalDiscontinuity( |
| DiscontinuityType type, const sp<AMessage> &extra); |
| |
| void signalEOS(status_t finalResult); |
| |
| sp<MediaSource> getSource(SourceType type); |
| |
| protected: |
| virtual ~Stream(); |
| |
| private: |
| Program *mProgram; |
| unsigned mElementaryPID; |
| unsigned mStreamType; |
| unsigned mPCR_PID; |
| int32_t mExpectedContinuityCounter; |
| |
| sp<ABuffer> mBuffer; |
| sp<AnotherPacketSource> mSource; |
| bool mPayloadStarted; |
| |
| uint64_t mPrevPTS; |
| |
| ElementaryStreamQueue *mQueue; |
| |
| status_t flush(); |
| status_t 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); |
| |
| bool isAudio() const; |
| bool isVideo() const; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(Stream); |
| }; |
| |
| struct ATSParser::PSISection : public RefBase { |
| PSISection(); |
| |
| status_t append(const void *data, size_t size); |
| void clear(); |
| |
| bool isComplete() const; |
| bool isEmpty() const; |
| |
| const uint8_t *data() const; |
| size_t size() const; |
| |
| protected: |
| virtual ~PSISection(); |
| |
| private: |
| sp<ABuffer> mBuffer; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(PSISection); |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::Program::Program( |
| ATSParser *parser, unsigned programNumber, unsigned programMapPID) |
| : mParser(parser), |
| mProgramNumber(programNumber), |
| mProgramMapPID(programMapPID), |
| mFirstPTSValid(false), |
| mFirstPTS(0) { |
| ALOGV("new program number %u", programNumber); |
| } |
| |
| bool ATSParser::Program::parsePSISection( |
| unsigned pid, ABitReader *br, status_t *err) { |
| *err = OK; |
| |
| if (pid != mProgramMapPID) { |
| return false; |
| } |
| |
| *err = parseProgramMap(br); |
| |
| return true; |
| } |
| |
| bool ATSParser::Program::parsePID( |
| unsigned pid, unsigned continuity_counter, |
| unsigned payload_unit_start_indicator, |
| ABitReader *br, status_t *err) { |
| *err = OK; |
| |
| ssize_t index = mStreams.indexOfKey(pid); |
| if (index < 0) { |
| return false; |
| } |
| |
| *err = mStreams.editValueAt(index)->parse( |
| continuity_counter, payload_unit_start_indicator, br); |
| |
| return true; |
| } |
| |
| void ATSParser::Program::signalDiscontinuity( |
| DiscontinuityType type, const sp<AMessage> &extra) { |
| int64_t mediaTimeUs; |
| if ((type & DISCONTINUITY_TIME) |
| && extra != NULL |
| && extra->findInt64( |
| IStreamListener::kKeyMediaTimeUs, &mediaTimeUs)) { |
| mFirstPTSValid = false; |
| } |
| |
| for (size_t i = 0; i < mStreams.size(); ++i) { |
| mStreams.editValueAt(i)->signalDiscontinuity(type, extra); |
| } |
| } |
| |
| 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; |
| }; |
| |
| status_t ATSParser::Program::parseProgramMap(ABitReader *br) { |
| unsigned table_id = br->getBits(8); |
| ALOGV(" table_id = %u", table_id); |
| CHECK_EQ(table_id, 0x02u); |
| |
| unsigned section_syntax_indicator = br->getBits(1); |
| ALOGV(" 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); |
| ALOGV(" 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)); |
| |
| unsigned PCR_PID = br->getBits(13); |
| ALOGV(" PCR_PID = 0x%04x", PCR_PID); |
| |
| MY_LOGV(" reserved = %u", br->getBits(4)); |
| |
| unsigned program_info_length = br->getBits(12); |
| ALOGV(" 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); |
| ALOGV(" stream_type = 0x%02x", streamType); |
| |
| MY_LOGV(" reserved = %u", br->getBits(3)); |
| |
| unsigned elementaryPID = br->getBits(13); |
| ALOGV(" elementary_PID = 0x%04x", elementaryPID); |
| |
| MY_LOGV(" reserved = %u", br->getBits(4)); |
| |
| unsigned ES_info_length = br->getBits(12); |
| ALOGV(" 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); |
| ALOGV(" 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) { |
| ALOGI("uh oh. stream PIDs have changed."); |
| PIDsChanged = true; |
| break; |
| } |
| } |
| |
| if (PIDsChanged) { |
| #if 0 |
| ALOGI("before:"); |
| for (size_t i = 0; i < mStreams.size(); ++i) { |
| sp<Stream> stream = mStreams.editValueAt(i); |
| |
| ALOGI("PID 0x%08x => type 0x%02x", stream->pid(), stream->type()); |
| } |
| |
| ALOGI("after:"); |
| for (size_t i = 0; i < infos.size(); ++i) { |
| StreamInfo &info = infos.editItemAt(i); |
| |
| ALOGI("PID 0x%08x => type 0x%02x", info.mPID, info.mType); |
| } |
| #endif |
| |
| // The only case we can recover from is if we have two streams |
| // and they switched PIDs. |
| |
| bool success = false; |
| |
| if (mStreams.size() == 2 && infos.size() == 2) { |
| const StreamInfo &info1 = infos.itemAt(0); |
| const StreamInfo &info2 = infos.itemAt(1); |
| |
| sp<Stream> s1 = mStreams.editValueAt(0); |
| sp<Stream> s2 = mStreams.editValueAt(1); |
| |
| bool caseA = |
| info1.mPID == s1->pid() && info1.mType == s2->type() |
| && info2.mPID == s2->pid() && info2.mType == s1->type(); |
| |
| bool caseB = |
| info1.mPID == s2->pid() && info1.mType == s1->type() |
| && info2.mPID == s1->pid() && info2.mType == s2->type(); |
| |
| if (caseA || caseB) { |
| unsigned pid1 = s1->pid(); |
| unsigned pid2 = s2->pid(); |
| s1->setPID(pid2); |
| s2->setPID(pid1); |
| |
| mStreams.clear(); |
| mStreams.add(s1->pid(), s1); |
| mStreams.add(s2->pid(), s2); |
| |
| success = true; |
| } |
| } |
| |
| if (!success) { |
| ALOGI("Stream PIDs changed and we cannot recover."); |
| return ERROR_MALFORMED; |
| } |
| } |
| |
| 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, PCR_PID); |
| |
| mStreams.add(info.mPID, stream); |
| } |
| } |
| |
| return OK; |
| } |
| |
| sp<MediaSource> ATSParser::Program::getSource(SourceType type) { |
| size_t index = (type == 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 (!(mParser->mFlags & TS_TIMESTAMPS_ARE_ABSOLUTE)) { |
| if (!mFirstPTSValid) { |
| mFirstPTSValid = true; |
| mFirstPTS = PTS; |
| PTS = 0; |
| } else if (PTS < mFirstPTS) { |
| PTS = 0; |
| } else { |
| PTS -= mFirstPTS; |
| } |
| } |
| |
| int64_t timeUs = (PTS * 100) / 9; |
| |
| if (mParser->mAbsoluteTimeAnchorUs >= 0ll) { |
| timeUs += mParser->mAbsoluteTimeAnchorUs; |
| } |
| |
| if (mParser->mTimeOffsetValid) { |
| timeUs += mParser->mTimeOffsetUs; |
| } |
| |
| return timeUs; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::Stream::Stream( |
| Program *program, |
| unsigned elementaryPID, |
| unsigned streamType, |
| unsigned PCR_PID) |
| : mProgram(program), |
| mElementaryPID(elementaryPID), |
| mStreamType(streamType), |
| mPCR_PID(PCR_PID), |
| mExpectedContinuityCounter(-1), |
| mPayloadStarted(false), |
| mPrevPTS(0), |
| mQueue(NULL) { |
| switch (mStreamType) { |
| case STREAMTYPE_H264: |
| mQueue = new ElementaryStreamQueue( |
| ElementaryStreamQueue::H264, |
| (mProgram->parserFlags() & ALIGNED_VIDEO_DATA) |
| ? ElementaryStreamQueue::kFlag_AlignedData : 0); |
| break; |
| case STREAMTYPE_MPEG2_AUDIO_ADTS: |
| mQueue = new ElementaryStreamQueue(ElementaryStreamQueue::AAC); |
| break; |
| case STREAMTYPE_MPEG1_AUDIO: |
| case STREAMTYPE_MPEG2_AUDIO: |
| mQueue = new ElementaryStreamQueue( |
| ElementaryStreamQueue::MPEG_AUDIO); |
| break; |
| |
| case STREAMTYPE_MPEG1_VIDEO: |
| case STREAMTYPE_MPEG2_VIDEO: |
| mQueue = new ElementaryStreamQueue( |
| ElementaryStreamQueue::MPEG_VIDEO); |
| break; |
| |
| case STREAMTYPE_MPEG4_VIDEO: |
| mQueue = new ElementaryStreamQueue( |
| ElementaryStreamQueue::MPEG4_VIDEO); |
| break; |
| |
| case STREAMTYPE_PCM_AUDIO: |
| mQueue = new ElementaryStreamQueue( |
| ElementaryStreamQueue::PCM_AUDIO); |
| break; |
| |
| default: |
| break; |
| } |
| |
| ALOGV("new stream PID 0x%02x, type 0x%02x", elementaryPID, streamType); |
| |
| if (mQueue != NULL) { |
| mBuffer = new ABuffer(192 * 1024); |
| mBuffer->setRange(0, 0); |
| } |
| } |
| |
| ATSParser::Stream::~Stream() { |
| delete mQueue; |
| mQueue = NULL; |
| } |
| |
| status_t ATSParser::Stream::parse( |
| unsigned continuity_counter, |
| unsigned payload_unit_start_indicator, ABitReader *br) { |
| if (mQueue == NULL) { |
| return OK; |
| } |
| |
| if (mExpectedContinuityCounter >= 0 |
| && (unsigned)mExpectedContinuityCounter != continuity_counter) { |
| ALOGI("discontinuity on stream pid 0x%04x", mElementaryPID); |
| |
| mPayloadStarted = false; |
| mBuffer->setRange(0, 0); |
| mExpectedContinuityCounter = -1; |
| |
| #if 0 |
| // Uncomment this if you'd rather see no corruption whatsoever on |
| // screen and suspend updates until we come across another IDR frame. |
| |
| if (mStreamType == STREAMTYPE_H264) { |
| ALOGI("clearing video queue"); |
| mQueue->clear(true /* clearFormat */); |
| } |
| #endif |
| |
| return OK; |
| } |
| |
| mExpectedContinuityCounter = (continuity_counter + 1) & 0x0f; |
| |
| 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. |
| |
| status_t err = flush(); |
| |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| mPayloadStarted = true; |
| } |
| |
| if (!mPayloadStarted) { |
| return OK; |
| } |
| |
| size_t payloadSizeBits = br->numBitsLeft(); |
| CHECK_EQ(payloadSizeBits % 8, 0u); |
| |
| size_t neededSize = mBuffer->size() + payloadSizeBits / 8; |
| if (mBuffer->capacity() < neededSize) { |
| // Increment in multiples of 64K. |
| neededSize = (neededSize + 65535) & ~65535; |
| |
| ALOGI("resizing buffer to %d bytes", neededSize); |
| |
| sp<ABuffer> newBuffer = new ABuffer(neededSize); |
| memcpy(newBuffer->data(), mBuffer->data(), mBuffer->size()); |
| newBuffer->setRange(0, mBuffer->size()); |
| mBuffer = newBuffer; |
| } |
| |
| memcpy(mBuffer->data() + mBuffer->size(), br->data(), payloadSizeBits / 8); |
| mBuffer->setRange(0, mBuffer->size() + payloadSizeBits / 8); |
| |
| return OK; |
| } |
| |
| bool ATSParser::Stream::isVideo() const { |
| switch (mStreamType) { |
| case STREAMTYPE_H264: |
| case STREAMTYPE_MPEG1_VIDEO: |
| case STREAMTYPE_MPEG2_VIDEO: |
| case STREAMTYPE_MPEG4_VIDEO: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| bool ATSParser::Stream::isAudio() const { |
| switch (mStreamType) { |
| case STREAMTYPE_MPEG1_AUDIO: |
| case STREAMTYPE_MPEG2_AUDIO: |
| case STREAMTYPE_MPEG2_AUDIO_ADTS: |
| case STREAMTYPE_PCM_AUDIO: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| void ATSParser::Stream::signalDiscontinuity( |
| DiscontinuityType type, const sp<AMessage> &extra) { |
| mExpectedContinuityCounter = -1; |
| |
| if (mQueue == NULL) { |
| return; |
| } |
| |
| mPayloadStarted = false; |
| mBuffer->setRange(0, 0); |
| |
| bool clearFormat = false; |
| if (isAudio()) { |
| if (type & DISCONTINUITY_AUDIO_FORMAT) { |
| clearFormat = true; |
| } |
| } else { |
| if (type & DISCONTINUITY_VIDEO_FORMAT) { |
| clearFormat = true; |
| } |
| } |
| |
| mQueue->clear(clearFormat); |
| |
| if (type & DISCONTINUITY_TIME) { |
| uint64_t resumeAtPTS; |
| if (extra != NULL |
| && extra->findInt64( |
| IStreamListener::kKeyResumeAtPTS, |
| (int64_t *)&resumeAtPTS)) { |
| int64_t resumeAtMediaTimeUs = |
| mProgram->convertPTSToTimestamp(resumeAtPTS); |
| |
| extra->setInt64("resume-at-mediatimeUs", resumeAtMediaTimeUs); |
| } |
| } |
| |
| if (mSource != NULL) { |
| mSource->queueDiscontinuity(type, extra); |
| } |
| } |
| |
| void ATSParser::Stream::signalEOS(status_t finalResult) { |
| if (mSource != NULL) { |
| mSource->signalEOS(finalResult); |
| } |
| } |
| |
| status_t ATSParser::Stream::parsePES(ABitReader *br) { |
| unsigned packet_startcode_prefix = br->getBits(24); |
| |
| ALOGV("packet_startcode_prefix = 0x%08x", packet_startcode_prefix); |
| |
| if (packet_startcode_prefix != 1) { |
| ALOGV("Supposedly payload_unit_start=1 unit does not start " |
| "with startcode."); |
| |
| return ERROR_MALFORMED; |
| } |
| |
| CHECK_EQ(packet_startcode_prefix, 0x000001u); |
| |
| unsigned stream_id = br->getBits(8); |
| ALOGV("stream_id = 0x%02x", stream_id); |
| |
| unsigned PES_packet_length = br->getBits(16); |
| ALOGV("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); |
| ALOGV("PTS_DTS_flags = %u", PTS_DTS_flags); |
| |
| unsigned ESCR_flag = br->getBits(1); |
| ALOGV("ESCR_flag = %u", ESCR_flag); |
| |
| unsigned ES_rate_flag = br->getBits(1); |
| ALOGV("ES_rate_flag = %u", ES_rate_flag); |
| |
| unsigned DSM_trick_mode_flag = br->getBits(1); |
| ALOGV("DSM_trick_mode_flag = %u", DSM_trick_mode_flag); |
| |
| unsigned additional_copy_info_flag = br->getBits(1); |
| ALOGV("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); |
| ALOGV("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); |
| |
| ALOGV("PTS = 0x%016llx (%.2f)", PTS, PTS / 90000.0); |
| |
| 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); |
| |
| ALOGV("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); |
| |
| ALOGV("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; |
| |
| if (br->numBitsLeft() < dataLength * 8) { |
| ALOGE("PES packet does not carry enough data to contain " |
| "payload. (numBitsLeft = %d, required = %d)", |
| br->numBitsLeft(), dataLength * 8); |
| |
| return ERROR_MALFORMED; |
| } |
| |
| 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); |
| |
| ALOGV("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); |
| } |
| |
| return OK; |
| } |
| |
| status_t ATSParser::Stream::flush() { |
| if (mBuffer->size() == 0) { |
| return OK; |
| } |
| |
| ALOGV("flushing stream 0x%04x size = %d", mElementaryPID, mBuffer->size()); |
| |
| ABitReader br(mBuffer->data(), mBuffer->size()); |
| |
| status_t err = parsePES(&br); |
| |
| mBuffer->setRange(0, 0); |
| |
| return err; |
| } |
| |
| void ATSParser::Stream::onPayloadData( |
| unsigned PTS_DTS_flags, uint64_t PTS, uint64_t /* DTS */, |
| const uint8_t *data, size_t size) { |
| #if 0 |
| ALOGI("payload streamType 0x%02x, PTS = 0x%016llx, dPTS = %lld", |
| mStreamType, |
| PTS, |
| (int64_t)PTS - mPrevPTS); |
| mPrevPTS = PTS; |
| #endif |
| |
| ALOGV("onPayloadData mStreamType=0x%02x", mStreamType); |
| |
| int64_t timeUs = 0ll; // no presentation timestamp available. |
| if (PTS_DTS_flags == 2 || PTS_DTS_flags == 3) { |
| 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) { |
| ALOGV("Stream PID 0x%08x of type 0x%02x now has data.", |
| mElementaryPID, mStreamType); |
| |
| mSource = new AnotherPacketSource(meta); |
| 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) { |
| switch (type) { |
| case VIDEO: |
| { |
| if (isVideo()) { |
| return mSource; |
| } |
| break; |
| } |
| |
| case AUDIO: |
| { |
| if (isAudio()) { |
| return mSource; |
| } |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| return NULL; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::ATSParser(uint32_t flags) |
| : mFlags(flags), |
| mAbsoluteTimeAnchorUs(-1ll), |
| mTimeOffsetValid(false), |
| mTimeOffsetUs(0ll), |
| mNumTSPacketsParsed(0), |
| mNumPCRs(0) { |
| mPSISections.add(0 /* PID */, new PSISection); |
| } |
| |
| ATSParser::~ATSParser() { |
| } |
| |
| status_t ATSParser::feedTSPacket(const void *data, size_t size) { |
| CHECK_EQ(size, kTSPacketSize); |
| |
| ABitReader br((const uint8_t *)data, kTSPacketSize); |
| return parseTS(&br); |
| } |
| |
| void ATSParser::signalDiscontinuity( |
| DiscontinuityType type, const sp<AMessage> &extra) { |
| int64_t mediaTimeUs; |
| if ((type & DISCONTINUITY_TIME) |
| && extra != NULL |
| && extra->findInt64( |
| IStreamListener::kKeyMediaTimeUs, &mediaTimeUs)) { |
| mAbsoluteTimeAnchorUs = mediaTimeUs; |
| } else if (type == DISCONTINUITY_ABSOLUTE_TIME) { |
| int64_t timeUs; |
| CHECK(extra->findInt64("timeUs", &timeUs)); |
| |
| CHECK(mPrograms.empty()); |
| mAbsoluteTimeAnchorUs = timeUs; |
| return; |
| } else if (type == DISCONTINUITY_TIME_OFFSET) { |
| int64_t offset; |
| CHECK(extra->findInt64("offset", &offset)); |
| |
| mTimeOffsetValid = true; |
| mTimeOffsetUs = offset; |
| return; |
| } |
| |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| mPrograms.editItemAt(i)->signalDiscontinuity(type, extra); |
| } |
| } |
| |
| 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); |
| ALOGV(" table_id = %u", table_id); |
| CHECK_EQ(table_id, 0x00u); |
| |
| unsigned section_syntax_indictor = br->getBits(1); |
| ALOGV(" 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); |
| ALOGV(" 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); |
| ALOGV(" 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); |
| |
| ALOGV(" program_map_PID = 0x%04x", programMapPID); |
| |
| bool found = false; |
| for (size_t index = 0; index < mPrograms.size(); ++index) { |
| const sp<Program> &program = mPrograms.itemAt(index); |
| |
| if (program->number() == program_number) { |
| program->updateProgramMapPID(programMapPID); |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) { |
| mPrograms.push( |
| new Program(this, program_number, programMapPID)); |
| } |
| |
| if (mPSISections.indexOfKey(programMapPID) < 0) { |
| mPSISections.add(programMapPID, new PSISection); |
| } |
| } |
| } |
| |
| MY_LOGV(" CRC = 0x%08x", br->getBits(32)); |
| } |
| |
| status_t ATSParser::parsePID( |
| ABitReader *br, unsigned PID, |
| unsigned continuity_counter, |
| unsigned payload_unit_start_indicator) { |
| ssize_t sectionIndex = mPSISections.indexOfKey(PID); |
| |
| if (sectionIndex >= 0) { |
| sp<PSISection> section = mPSISections.valueAt(sectionIndex); |
| |
| if (payload_unit_start_indicator) { |
| CHECK(section->isEmpty()); |
| |
| unsigned skip = br->getBits(8); |
| br->skipBits(skip * 8); |
| } |
| |
| CHECK((br->numBitsLeft() % 8) == 0); |
| status_t err = section->append(br->data(), br->numBitsLeft() / 8); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| if (!section->isComplete()) { |
| return OK; |
| } |
| |
| ABitReader sectionBits(section->data(), section->size()); |
| |
| if (PID == 0) { |
| parseProgramAssociationTable(§ionBits); |
| } else { |
| bool handled = false; |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| status_t err; |
| if (!mPrograms.editItemAt(i)->parsePSISection( |
| PID, §ionBits, &err)) { |
| continue; |
| } |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| handled = true; |
| break; |
| } |
| |
| if (!handled) { |
| mPSISections.removeItem(PID); |
| section.clear(); |
| } |
| } |
| |
| if (section != NULL) { |
| section->clear(); |
| } |
| |
| return OK; |
| } |
| |
| bool handled = false; |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| status_t err; |
| if (mPrograms.editItemAt(i)->parsePID( |
| PID, continuity_counter, payload_unit_start_indicator, |
| br, &err)) { |
| if (err != OK) { |
| return err; |
| } |
| |
| handled = true; |
| break; |
| } |
| } |
| |
| if (!handled) { |
| ALOGV("PID 0x%04x not handled.", PID); |
| } |
| |
| return OK; |
| } |
| |
| void ATSParser::parseAdaptationField(ABitReader *br, unsigned PID) { |
| unsigned adaptation_field_length = br->getBits(8); |
| |
| if (adaptation_field_length > 0) { |
| unsigned discontinuity_indicator = br->getBits(1); |
| |
| if (discontinuity_indicator) { |
| ALOGV("PID 0x%04x: discontinuity_indicator = 1 (!!!)", PID); |
| } |
| |
| br->skipBits(2); |
| unsigned PCR_flag = br->getBits(1); |
| |
| size_t numBitsRead = 4; |
| |
| if (PCR_flag) { |
| br->skipBits(4); |
| uint64_t PCR_base = br->getBits(32); |
| PCR_base = (PCR_base << 1) | br->getBits(1); |
| |
| br->skipBits(6); |
| unsigned PCR_ext = br->getBits(9); |
| |
| // The number of bytes from the start of the current |
| // MPEG2 transport stream packet up and including |
| // the final byte of this PCR_ext field. |
| size_t byteOffsetFromStartOfTSPacket = |
| (188 - br->numBitsLeft() / 8); |
| |
| uint64_t PCR = PCR_base * 300 + PCR_ext; |
| |
| ALOGV("PID 0x%04x: PCR = 0x%016llx (%.2f)", |
| PID, PCR, PCR / 27E6); |
| |
| // The number of bytes received by this parser up to and |
| // including the final byte of this PCR_ext field. |
| size_t byteOffsetFromStart = |
| mNumTSPacketsParsed * 188 + byteOffsetFromStartOfTSPacket; |
| |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| updatePCR(PID, PCR, byteOffsetFromStart); |
| } |
| |
| numBitsRead += 52; |
| } |
| |
| CHECK_GE(adaptation_field_length * 8, numBitsRead); |
| |
| br->skipBits(adaptation_field_length * 8 - numBitsRead); |
| } |
| } |
| |
| status_t ATSParser::parseTS(ABitReader *br) { |
| ALOGV("---"); |
| |
| unsigned sync_byte = br->getBits(8); |
| CHECK_EQ(sync_byte, 0x47u); |
| |
| if (br->getBits(1)) { // transport_error_indicator |
| // silently ignore. |
| return OK; |
| } |
| |
| unsigned payload_unit_start_indicator = br->getBits(1); |
| ALOGV("payload_unit_start_indicator = %u", payload_unit_start_indicator); |
| |
| MY_LOGV("transport_priority = %u", br->getBits(1)); |
| |
| unsigned PID = br->getBits(13); |
| ALOGV("PID = 0x%04x", PID); |
| |
| MY_LOGV("transport_scrambling_control = %u", br->getBits(2)); |
| |
| unsigned adaptation_field_control = br->getBits(2); |
| ALOGV("adaptation_field_control = %u", adaptation_field_control); |
| |
| unsigned continuity_counter = br->getBits(4); |
| ALOGV("PID = 0x%04x, continuity_counter = %u", PID, continuity_counter); |
| |
| // ALOGI("PID = 0x%04x, continuity_counter = %u", PID, continuity_counter); |
| |
| if (adaptation_field_control == 2 || adaptation_field_control == 3) { |
| parseAdaptationField(br, PID); |
| } |
| |
| status_t err = OK; |
| |
| if (adaptation_field_control == 1 || adaptation_field_control == 3) { |
| err = parsePID( |
| br, PID, continuity_counter, payload_unit_start_indicator); |
| } |
| |
| ++mNumTSPacketsParsed; |
| |
| return err; |
| } |
| |
| sp<MediaSource> ATSParser::getSource(SourceType type) { |
| int which = -1; // any |
| |
| for (size_t i = 0; i < mPrograms.size(); ++i) { |
| const sp<Program> &program = mPrograms.editItemAt(i); |
| |
| if (which >= 0 && (int)program->number() != which) { |
| continue; |
| } |
| |
| sp<MediaSource> source = program->getSource(type); |
| |
| if (source != NULL) { |
| return source; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| bool ATSParser::PTSTimeDeltaEstablished() { |
| if (mPrograms.isEmpty()) { |
| return false; |
| } |
| |
| return mPrograms.editItemAt(0)->PTSTimeDeltaEstablished(); |
| } |
| |
| void ATSParser::updatePCR( |
| unsigned PID, uint64_t PCR, size_t byteOffsetFromStart) { |
| ALOGV("PCR 0x%016llx @ %d", PCR, byteOffsetFromStart); |
| |
| if (mNumPCRs == 2) { |
| mPCR[0] = mPCR[1]; |
| mPCRBytes[0] = mPCRBytes[1]; |
| mSystemTimeUs[0] = mSystemTimeUs[1]; |
| mNumPCRs = 1; |
| } |
| |
| mPCR[mNumPCRs] = PCR; |
| mPCRBytes[mNumPCRs] = byteOffsetFromStart; |
| mSystemTimeUs[mNumPCRs] = ALooper::GetNowUs(); |
| |
| ++mNumPCRs; |
| |
| if (mNumPCRs == 2) { |
| double transportRate = |
| (mPCRBytes[1] - mPCRBytes[0]) * 27E6 / (mPCR[1] - mPCR[0]); |
| |
| ALOGV("transportRate = %.2f bytes/sec", transportRate); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| ATSParser::PSISection::PSISection() { |
| } |
| |
| ATSParser::PSISection::~PSISection() { |
| } |
| |
| status_t ATSParser::PSISection::append(const void *data, size_t size) { |
| if (mBuffer == NULL || mBuffer->size() + size > mBuffer->capacity()) { |
| size_t newCapacity = |
| (mBuffer == NULL) ? size : mBuffer->capacity() + size; |
| |
| newCapacity = (newCapacity + 1023) & ~1023; |
| |
| sp<ABuffer> newBuffer = new ABuffer(newCapacity); |
| |
| if (mBuffer != NULL) { |
| memcpy(newBuffer->data(), mBuffer->data(), mBuffer->size()); |
| newBuffer->setRange(0, mBuffer->size()); |
| } else { |
| newBuffer->setRange(0, 0); |
| } |
| |
| mBuffer = newBuffer; |
| } |
| |
| memcpy(mBuffer->data() + mBuffer->size(), data, size); |
| mBuffer->setRange(0, mBuffer->size() + size); |
| |
| return OK; |
| } |
| |
| void ATSParser::PSISection::clear() { |
| if (mBuffer != NULL) { |
| mBuffer->setRange(0, 0); |
| } |
| } |
| |
| bool ATSParser::PSISection::isComplete() const { |
| if (mBuffer == NULL || mBuffer->size() < 3) { |
| return false; |
| } |
| |
| unsigned sectionLength = U16_AT(mBuffer->data() + 1) & 0xfff; |
| return mBuffer->size() >= sectionLength + 3; |
| } |
| |
| bool ATSParser::PSISection::isEmpty() const { |
| return mBuffer == NULL || mBuffer->size() == 0; |
| } |
| |
| const uint8_t *ATSParser::PSISection::data() const { |
| return mBuffer == NULL ? NULL : mBuffer->data(); |
| } |
| |
| size_t ATSParser::PSISection::size() const { |
| return mBuffer == NULL ? 0 : mBuffer->size(); |
| } |
| |
| } // namespace android |