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mp4fragmenter.cpp
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mp4fragmenter.cpp
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#include "mp4fragmenter.hpp"
#include <stdio.h>
#include <algorithm>
namespace
{
const uint8_t RESERVED_0 = 0;
const uint8_t PRE_DEFINED_0 = 0;
void PushUshort(std::vector<uint8_t> &data, uint32_t n)
{
data.push_back((n >> 8) & 0xff);
data.push_back(n & 0xff);
}
void PushUint(std::vector<uint8_t> &data, uint32_t n)
{
PushUshort(data, n >> 16);
PushUshort(data, n & 0xffff);
}
void PushUint64(std::vector<uint8_t> &data, uint64_t n)
{
PushUint(data, n >> 32);
PushUint(data, n & 0xffffffff);
}
void PushString(std::vector<uint8_t> &data, const char *s)
{
for (size_t i = 0; s[i]; ++i) {
data.push_back(s[i]);
}
}
void WriteUint(uint8_t *data, uint32_t n)
{
data[0] = (n >> 24) & 0xff;
data[1] = (n >> 16) & 0xff;
data[2] = (n >> 8) & 0xff;
data[3] = n & 0xff;
}
template<class P>
void PushBox(std::vector<uint8_t> &data, const char *type, P pushProc, uint32_t flagsOrBox = 0xffffffff)
{
size_t i = data.size();
PushUint(data, 0);
PushString(data, type);
if (flagsOrBox != 0xffffffff) {
PushUint(data, flagsOrBox);
}
pushProc(data);
WriteUint(&data[i], static_cast<uint32_t>(data.size() - i));
}
template<class P>
void PushFullBox(std::vector<uint8_t> &data, const char *type, uint32_t flags, P pushProc)
{
PushBox(data, type, pushProc, flags);
}
template<class P>
void ParseNals(const uint8_t *payload, size_t payloadSize, P onNalProc)
{
size_t nalPos = 0;
for (size_t i = 2;;) {
if (i >= payloadSize || (payload[i] == 1 && payload[i - 1] == 0 && payload[i - 2] == 0)) {
if (nalPos != 0) {
onNalProc(payload + nalPos, (i >= payloadSize ? payloadSize : i - 2 - (payload[i - 3] == 0)) - nalPos);
}
if (i >= payloadSize) {
break;
}
nalPos = i + 1;
i += 3;
}
else if (payload[i] > 0) {
i += 3;
}
else {
++i;
}
}
}
std::vector<uint8_t> EbspToRbsp(const std::vector<uint8_t> &src)
{
std::vector<uint8_t> dest;
for (size_t i = 0; i < src.size(); ++i) {
if (i < 2 || i + 1 == src.size() || src[i - 2] != 0 || src[i - 1] != 0 || src[i] != 3 || src[i + 1] > 3) {
dest.push_back(src[i]);
}
}
return dest;
}
int ReadUegBits(const uint8_t *data, size_t &pos)
{
// Reads up to 61bits
for (int n = 0; n < 31; ++n) {
if (read_bool(data, pos)) {
return read_bits(data, pos, n) - 1 + (1 << n);
}
}
return 0;
}
int ReadSegBits(const uint8_t *data, size_t &pos)
{
int r = ReadUegBits(data, pos);
return (r >> 1) + (r & 1 ? 1 : -r);
}
bool SyncAdtsPayload(std::vector<uint8_t> &workspace, const uint8_t *payload, size_t lenBytes)
{
if (!workspace.empty() && workspace[0] == 0) {
// No need to resync
workspace.insert(workspace.end(), payload, payload + lenBytes);
workspace[0] = 0xff;
}
else {
// Resync
workspace.insert(workspace.end(), payload, payload + lenBytes);
size_t i = 0;
for (; i < workspace.size(); ++i) {
if (workspace[i] == 0xff && (i + 1 >= workspace.size() || (workspace[i + 1] & 0xf0) == 0xf0)) {
break;
}
}
workspace.erase(workspace.begin(), workspace.begin() + i);
if (workspace.size() < 2) {
return false;
}
}
return true;
}
}
const int CMp4Fragmenter::VIDEO_TRACK_ID = 1;
const int CMp4Fragmenter::AUDIO_TRACK_ID = 2;
CMp4Fragmenter::CMp4Fragmenter()
: m_fragmentCount(0)
, m_fragmentDurationResidual(0)
, m_videoPts(-1)
, m_videoDts(-1)
, m_videoDecodeTime(0)
, m_videoDecodeTimeDts(-1)
, m_audioPts(-1)
, m_audioDecodeTime(0)
, m_audioDecodeTimePts(-1)
, m_codecWidth(-1)
, m_parallelismType(0)
, m_numTemporalLayers(1)
, m_temporalIDNestingFlag(false)
, m_aacProfile(-1)
{
}
void CMp4Fragmenter::AddPackets(const std::vector<uint8_t> &packets, const PMT &pmt, bool packetsMaybeNotEndAtUnitStart)
{
int64_t baseVideoDts = -1;
int64_t baseAudioPts = -1;
m_emsg.clear();
m_videoMdat.clear();
m_audioMdat.clear();
m_videoSampleInfos.clear();
m_audioSampleSizes.clear();
for (size_t i = 0; i < packets.size(); i += 188) {
const uint8_t *packet = &packets[i];
int unitStart = extract_ts_header_unit_start(packet);
int pid = extract_ts_header_pid(packet);
int counter = extract_ts_header_counter(packet);
int payloadSize = get_ts_payload_size(packet);
const uint8_t *payload = packet + 188 - payloadSize;
if (pid != 0 &&
(pid == pmt.first_video_pid ||
pid == pmt.first_adts_audio_pid ||
pid == pmt.first_id3_metadata_pid)) {
auto &pesPair = pid == pmt.first_video_pid ? m_videoPes :
pid == pmt.first_adts_audio_pid ? m_audioPes : m_id3Pes;
int &pesCounter = pesPair.first;
std::vector<uint8_t> &pes = pesPair.second;
if (unitStart) {
pesCounter = counter;
if (pes.size() >= 6 && pes[0] == 0 && pes[1] == 0 && pes[2] == 1) {
size_t pesPacketLength = (pes[4] << 8) | pes[5];
if (pesPacketLength == 0 && &pesPair == &m_videoPes) {
// Video PES has been accumulated
AddVideoPes(pes, pmt.first_video_stream_type == H_265_VIDEO);
if (baseVideoDts < 0) {
baseVideoDts = m_videoDts;
}
}
}
pes.assign(payload, payload + payloadSize);
}
else if (!pes.empty()) {
pesCounter = (pesCounter + 1) & 0x0f;
if (pesCounter == counter) {
pes.insert(pes.end(), payload, payload + payloadSize);
}
else {
// Ignore packets until the next unit-start
pes.clear();
}
}
if (pes.size() >= 6) {
size_t pesPacketLength = (pes[4] << 8) | pes[5];
if (pesPacketLength != 0 && pes.size() >= 6 + pesPacketLength) {
// PES has been accumulated
pes.resize(6 + pesPacketLength);
if (pes[0] == 0 && pes[1] == 0 && pes[2] == 1) {
if (&pesPair == &m_videoPes) {
AddVideoPes(pes, pmt.first_video_stream_type == H_265_VIDEO);
if (baseVideoDts < 0) {
baseVideoDts = m_videoDts;
}
}
else if (&pesPair == &m_audioPes) {
AddAudioPes(pes);
if (baseAudioPts < 0) {
baseAudioPts = m_audioPts;
}
}
else {
AddID3Pes(pes);
}
}
pes.clear();
}
}
}
}
std::vector<uint8_t> &pes = m_videoPes.second;
if (pes.size() >= 6 && pes[0] == 0 && pes[1] == 0 && pes[2] == 1) {
size_t pesPacketLength = (pes[4] << 8) | pes[5];
if (pesPacketLength == 0 && !packetsMaybeNotEndAtUnitStart) {
// Video PES has been accumulated (Assuming packets are split at the unit start.)
AddVideoPes(pes, pmt.first_video_stream_type == H_265_VIDEO);
if (baseVideoDts < 0) {
baseVideoDts = m_videoDts;
}
pes.clear();
}
}
if (m_moov.empty()) {
if ((pmt.first_video_pid == 0 || m_codecWidth >= 0) &&
(pmt.first_adts_audio_pid == 0 || m_aacProfile >= 0)) {
PushFtypAndMoov(m_moov);
}
}
if (!m_moov.empty()) {
size_t fragSize = m_fragments.size();
int fragDurationMsec = 0;
m_fragments.insert(m_fragments.end(), m_emsg.begin(), m_emsg.end());
if (!m_videoSampleInfos.empty() || !m_audioSampleSizes.empty()) {
// Increment playback position
if (baseVideoDts >= 0 && m_videoDecodeTimeDts >= 0) {
int64_t diff = (0x200000000 + baseVideoDts - m_videoDecodeTimeDts) & 0x1ffffffff;
m_videoDecodeTime += diff < 0x100000000 ? diff : 0;
m_videoDecodeTimeDts = baseVideoDts;
}
if (baseAudioPts >= 0 && m_audioDecodeTimePts >= 0) {
int64_t diff = (0x200000000 + baseAudioPts - m_audioDecodeTimePts) & 0x1ffffffff;
m_audioDecodeTime += diff < 0x100000000 ? diff : 0;
m_audioDecodeTimePts = baseAudioPts;
}
// Adjust difference between video/audio playback positions
if (m_videoDecodeTimeDts < 0 && baseVideoDts >= 0) {
if (m_audioDecodeTimePts >= 0) {
int64_t diff = (0x200000000 + m_audioDecodeTime + baseVideoDts - m_audioDecodeTimePts) & 0x1ffffffff;
m_videoDecodeTime = std::min<int64_t>(diff < 0x100000000 ? diff : 0, 900000);
}
else if (baseAudioPts >= 0) {
int64_t diff = (0x200000000 + baseVideoDts - baseAudioPts) & 0x1ffffffff;
m_videoDecodeTime = std::min<int64_t>(diff < 0x100000000 ? diff : 0, 900000);
}
m_videoDecodeTimeDts = baseVideoDts;
}
if (m_audioDecodeTimePts < 0 && baseAudioPts >= 0) {
if (m_videoDecodeTimeDts >= 0) {
int64_t diff = (0x200000000 + m_videoDecodeTime + baseAudioPts - m_videoDecodeTimeDts) & 0x1ffffffff;
m_audioDecodeTime = std::min<int64_t>(diff < 0x100000000 ? diff : 0, 900000);
}
m_audioDecodeTimePts = baseAudioPts;
}
std::pair<int, int> duration;
PushMoof(m_fragments, duration, m_fragmentCount);
if (duration.first > 0) {
int64_t num = static_cast<int64_t>(duration.first) * 1000 + m_fragmentDurationResidual;
fragDurationMsec = static_cast<int>(num / duration.second);
m_fragmentDurationResidual = static_cast<int>(num % duration.second);
}
}
fragSize = m_fragments.size() - fragSize;
if (fragSize > 0) {
m_fragmentSizes.push_back(fragSize);
m_fragmentDurationsMsec.push_back(fragDurationMsec);
}
}
}
void CMp4Fragmenter::ClearFragments()
{
m_fragments.clear();
m_fragmentSizes.clear();
m_fragmentDurationsMsec.clear();
}
void CMp4Fragmenter::AddVideoPes(const std::vector<uint8_t> &pes, bool h265)
{
int streamID = pes[3];
if ((streamID & 0xf0) == 0xe0 && pes.size() >= 9) {
size_t payloadPos = 9 + pes[8];
if (payloadPos < pes.size()) {
int64_t lastDts = m_videoDts;
int ptsDtsFlags = pes[7] >> 6;
if (ptsDtsFlags >= 2 && pes.size() >= 14) {
m_videoPts = get_pes_timestamp(&pes[9]);
m_videoDts = m_videoPts;
if (ptsDtsFlags == 3 && pes.size() >= 19) {
m_videoDts = get_pes_timestamp(&pes[14]);
}
}
bool parameterChanged = false;
bool isKey = false;
size_t sampleSize = 0;
ParseNals(&pes[payloadPos], pes.size() - payloadPos,
[this, h265, ¶meterChanged, &isKey, &sampleSize](const uint8_t *nal, size_t len) {
if (len >= (h265 ? 2 : 1)) {
int nalUnitType = h265 ? (nal[0] >> 1) & 0x3f : nal[0] & 0x1f;
if (h265 && nalUnitType == 32) {
// "Multiple VPS" is not supported
if (m_vps.size() != len || !std::equal(nal, nal + len, m_vps.begin())) {
if (m_moov.empty()) {
m_vps.assign(nal, nal + len);
ParseVps(m_vps);
}
else {
parameterChanged = true;
}
}
}
else if (nalUnitType == (h265 ? 33 : 7)) {
// "Multiple SPS" is not supported
if (m_sps.size() != len || !std::equal(nal, nal + len, m_sps.begin())) {
if (m_moov.empty()) {
m_sps.assign(nal, nal + len);
if (!(h265 ? ParseH265Sps(m_sps) : ParseSps(m_sps))) {
m_codecWidth = -1;
}
}
else {
parameterChanged = true;
}
}
}
else if (nalUnitType == (h265 ? 34 : 8)) {
uint8_t sliceIntro[8] = {};
std::copy(nal + (h265 ? 2 : 1), nal + std::min(len, (h265 ? 2 : 1) + sizeof(sliceIntro)), sliceIntro);
size_t pos = 0;
int picParameterSetID = ReadUegBits(sliceIntro, pos);
if (m_ppsMap.count(picParameterSetID) == 0) {
if (m_ppsMap.size() < 255) {
m_ppsMap.emplace(picParameterSetID, std::vector<uint8_t>(nal, nal + len));
if (m_moov.empty()) {
if (h265 && m_ppsMap.size() == 1) {
ParseH265Pps(m_ppsMap[picParameterSetID]);
}
}
else {
fprintf(stderr, "Warning: New PPS found. Updating moov atom.\n");
m_moov.clear();
PushFtypAndMoov(m_moov);
}
}
}
else if (m_ppsMap[picParameterSetID].size() != len ||
!std::equal(nal, nal + len, m_ppsMap[picParameterSetID].begin())) {
parameterChanged = true;
}
}
else if (nalUnitType == (h265 ? 35 : 9)) {
// Drop AUD
}
else if (h265 ? (nalUnitType == 39 || nalUnitType == 40) : (nalUnitType == 6)) {
// Drop SEI
}
else {
if (h265 ? (nalUnitType >= 16 && nalUnitType <= 21) : (nalUnitType == 5)) {
// IRAP (BLA or CRA or IDR)
isKey = true;
}
else if (!h265 && nalUnitType == 1) {
// Non-IDR
// Emulation prevention should not appear unless first_mb_in_slice value is huge
if (len >= 5 && (nal[1] != 0 || nal[2] != 0 || nal[3] != 3)) {
uint8_t sliceIntro[16] = {};
std::copy(nal + 1, nal + 5, sliceIntro);
size_t pos = 0;
// first_mb_in_slice
ReadUegBits(sliceIntro, pos);
int sliceType = ReadUegBits(sliceIntro, pos);
if (sliceType == 2 || sliceType == 4 || sliceType == 7 || sliceType == 9) {
// I or SI picture
isKey = true;
}
}
}
sampleSize += 4 + len;
PushUint(m_videoMdat, static_cast<uint32_t>(len));
m_videoMdat.insert(m_videoMdat.end(), nal, nal + len);
}
}
});
if (m_moov.empty()) {
m_h265 = h265;
}
else if (m_h265 != h265) {
parameterChanged = true;
}
if (m_codecWidth < 0 || parameterChanged) {
if (parameterChanged) {
fprintf(stderr, "Warning: Video parameters have changed.\n");
}
m_videoMdat.clear();
m_videoSampleInfos.clear();
}
else {
VIDEO_SAMPLE_INFO info;
info.sampleSize = static_cast<uint32_t>(sampleSize);
info.isKey = isKey;
int64_t diff = (0x200000000 + m_videoDts - lastDts) & 0x1ffffffff;
info.sampleDuration = lastDts < 0 || diff > 900000 ? -1 : static_cast<int>(diff);
diff = (0x200000000 + m_videoPts - m_videoDts) & 0x1ffffffff;
info.compositionTimeOffsets = diff > 900000 ? 0 : static_cast<int>(diff);
m_videoSampleInfos.push_back(info);
}
}
}
}
void CMp4Fragmenter::AddAudioPes(const std::vector<uint8_t> &pes)
{
int streamID = pes[3];
if ((streamID & 0xe0) == 0xc0 && pes.size() >= 9) {
size_t payloadPos = 9 + pes[8];
if (payloadPos < pes.size() && SyncAdtsPayload(m_workspace, &pes[payloadPos], pes.size() - payloadPos)) {
int ptsDtsFlags = pes[7] >> 6;
if (ptsDtsFlags >= 2 && pes.size() >= 14) {
m_audioPts = get_pes_timestamp(&pes[9]);
}
while (m_workspace.size() > 0) {
if (m_workspace[0] != 0xff) {
// Need to resync
m_workspace.clear();
break;
}
if (m_workspace.size() < 7) {
break;
}
if ((m_workspace[1] & 0xf0) != 0xf0) {
m_workspace.clear();
break;
}
// ADTS header
size_t pos = 12;
pos += 3;
bool protectionAbsent = read_bool(m_workspace.data(), pos);
int profile = read_bits(m_workspace.data(), pos, 2);
int samplingFrequencyIndex = read_bits(m_workspace.data(), pos, 4);
++pos;
int channelConfiguration = read_bits(m_workspace.data(), pos, 3);
pos += 4;
size_t frameLenBytes = read_bits(m_workspace.data(), pos, 13);
size_t headerSize = protectionAbsent ? 7 : 9;
if (frameLenBytes < headerSize) {
m_workspace.clear();
break;
}
if (m_workspace.size() < frameLenBytes) {
break;
}
if (m_moov.empty() && samplingFrequencyIndex < 13) {
static const int SAMPLING_FREQUENCY[13] = {
96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350
};
m_aacProfile = profile;
m_samplingFrequency = SAMPLING_FREQUENCY[samplingFrequencyIndex];
m_samplingFrequencyIndex = samplingFrequencyIndex;
m_channelConfiguration = channelConfiguration;
}
if (m_aacProfile == profile &&
m_samplingFrequencyIndex == samplingFrequencyIndex &&
m_channelConfiguration == channelConfiguration)
{
m_audioMdat.insert(m_audioMdat.end(), m_workspace.begin() + headerSize, m_workspace.begin() + frameLenBytes);
m_audioSampleSizes.push_back(static_cast<uint16_t>(frameLenBytes - headerSize));
}
m_workspace.erase(m_workspace.begin(), m_workspace.begin() + frameLenBytes);
}
if (!m_workspace.empty()) {
// This 0 means synchronized 0xff.
m_workspace[0] = 0;
}
}
}
}
void CMp4Fragmenter::AddID3Pes(const std::vector<uint8_t> &pes)
{
const uint8_t PRIVATE_STREAM_1 = 0xbd;
int streamID = pes[3];
if (streamID == PRIVATE_STREAM_1 && pes.size() >= 14) {
size_t payloadPos = 9 + pes[8];
int ptsDtsFlags = pes[7] >> 6;
if (payloadPos < pes.size() && ptsDtsFlags >= 2) {
// Sync with media time
int64_t emsgTime = m_videoDecodeTimeDts >= 0 ? m_videoDecodeTime : m_audioDecodeTime;
int64_t mediaTimePts = m_videoDecodeTimeDts >= 0 ? m_videoDecodeTimeDts : m_audioDecodeTimePts;
if (mediaTimePts >= 0) {
int64_t diff = (0x200000000 + get_pes_timestamp(&pes[9]) - mediaTimePts) & 0x1ffffffff;
emsgTime += std::min<int64_t>(diff < 0x100000000 ? diff : 0, 900000);
}
PushFullBox(m_emsg, "emsg", 0x01000000, [payloadPos, emsgTime, &pes](std::vector<uint8_t> &data) {
PushUint(data, 90000);
PushUint64(data, emsgTime);
PushUint(data, 0xffffffff);
PushUint(data, 0);
PushString(data, "https://aomedia.org/emsg/ID3");
data.push_back(0);
data.push_back(0);
data.insert(data.end(), pes.begin() + payloadPos, pes.end());
});
}
}
}
void CMp4Fragmenter::PushFtypAndMoov(std::vector<uint8_t> &data) const
{
PushBox(data, "ftyp", [](std::vector<uint8_t> &data) {
PushString(data, "isom");
PushUint(data, 1);
PushString(data, "isom");
PushString(data, "avc1");
});
PushBox(data, "moov", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "mvhd", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 1000);
PushUint(data, 0);
PushUint(data, 0x00010000);
PushUshort(data, 0x0100);
PushUshort(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
// Unity matrix
PushUint(data, 0x00010000);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0x00010000);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0x40000000);
for (int i = 0; i < 6; ++i) {
PushUint(data, PRE_DEFINED_0);
}
PushUint(data, AUDIO_TRACK_ID + 1);
});
if (m_codecWidth >= 0) {
PushBox(data, "trak", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "tkhd", 0x00000003, [this](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, VIDEO_TRACK_ID);
PushUint(data, RESERVED_0);
PushUint(data, 0);
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushUshort(data, 0);
PushUshort(data, 0);
PushUshort(data, 0);
PushUshort(data, RESERVED_0);
// Unity matrix
PushUint(data, 0x00010000);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0x00010000);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0x40000000);
PushUshort(data, (m_codecWidth * m_sarWidth + (m_sarHeight - 1)) / m_sarHeight);
PushUshort(data, 0);
PushUshort(data, m_codecHeight);
PushUshort(data, 0);
});
PushBox(data, "mdia", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "mdhd", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 90000);
PushUint(data, 0);
// "und"
PushUshort(data, 0x55c4);
PushUshort(data, PRE_DEFINED_0);
});
PushFullBox(data, "hdlr", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, PRE_DEFINED_0);
PushString(data, "vide");
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushString(data, "Video Handler");
data.push_back(0);
});
PushBox(data, "minf", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "vmhd", 0x00000001, [](std::vector<uint8_t> &data) {
PushUshort(data, 0);
PushUshort(data, 0);
PushUshort(data, 0);
PushUshort(data, 0);
});
PushBox(data, "dinf", [](std::vector<uint8_t> &data) {
PushFullBox(data, "dref", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 1);
PushFullBox(data, "url ", 0x00000001, [](std::vector<uint8_t> &data) {
static_cast<void>(data);
});
});
});
PushBox(data, "stbl", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "stsd", 0x00000000, [this](std::vector<uint8_t> &data) {
PushUint(data, 1);
PushBox(data, m_h265 ? "hvc1" : "avc1", [this](std::vector<uint8_t> &data) {
for (int i = 0; i < 6; ++i) {
data.push_back(RESERVED_0);
}
PushUshort(data, 1);
PushUshort(data, PRE_DEFINED_0);
PushUshort(data, RESERVED_0);
PushUint(data, PRE_DEFINED_0);
PushUint(data, PRE_DEFINED_0);
PushUint(data, PRE_DEFINED_0);
PushUshort(data, m_codecWidth);
PushUshort(data, m_codecHeight);
PushUshort(data, 72);
PushUshort(data, 0);
PushUshort(data, 72);
PushUshort(data, 0);
PushUint(data, RESERVED_0);
PushUshort(data, 1);
// Empty compressorname
for (int i = 0; i < 32; ++i) {
data.push_back(0);
}
PushUshort(data, 24);
PushUshort(data, 0xffff);
if (m_h265) {
PushBox(data, "hvcC", [this](std::vector<uint8_t> &data) {
data.push_back(1);
data.push_back(static_cast<uint8_t>((m_generalProfileSpace << 6) | (m_generalTierFlag << 5) | m_generalProfileIdc));
data.insert(data.end(), m_generalProfileCompatibilityFlags,
m_generalProfileCompatibilityFlags + sizeof(m_generalProfileCompatibilityFlags));
data.insert(data.end(), m_generalConstraintIndicatorFlags,
m_generalConstraintIndicatorFlags + sizeof(m_generalConstraintIndicatorFlags));
data.push_back(static_cast<uint8_t>(m_generalLevelIdc));
PushUshort(data, 0xf000 | m_minSpatialSegmentationIdc);
data.push_back(static_cast<uint8_t>(0xfc | m_parallelismType));
data.push_back(static_cast<uint8_t>(0xfc | m_chromaFormatIdc));
data.push_back(static_cast<uint8_t>(0xf8 | m_bitDepthLumaMinus8));
data.push_back(static_cast<uint8_t>(0xf8 | m_bitDepthChromaMinus8));
data.push_back(0);
data.push_back(0);
data.push_back(((m_numTemporalLayers & 0x07) << 3) | (m_temporalIDNestingFlag << 2) | 3);
data.push_back(3);
data.push_back(0x80 | 32);
PushUshort(data, m_vps.empty() ? 0 : 1);
if (m_vps.empty()) {
fprintf(stderr, "Warning: No VPS was found when generating moov atom.\n");
}
else {
PushUshort(data, static_cast<uint32_t>(m_vps.size()));
data.insert(data.end(), m_vps.begin(), m_vps.end());
}
data.push_back(0x80 | 33);
PushUshort(data, 1);
PushUshort(data, static_cast<uint32_t>(m_sps.size()));
data.insert(data.end(), m_sps.begin(), m_sps.end());
data.push_back(0x80 | 34);
PushUshort(data, static_cast<uint32_t>(m_ppsMap.size()));
if (m_ppsMap.empty()) {
fprintf(stderr, "Warning: No PPS was found when generating moov atom.\n");
}
for (int idMin = -1;;) {
// ascending order
auto itMin = m_ppsMap.end();
for (auto it = m_ppsMap.begin(); it != m_ppsMap.end(); ++it) {
if (it->first > idMin && (itMin == m_ppsMap.end() || itMin->first > it->first)) {
itMin = it;
}
}
if (itMin == m_ppsMap.end()) {
break;
}
idMin = itMin->first;
PushUshort(data, static_cast<uint32_t>(itMin->second.size()));
data.insert(data.end(), itMin->second.begin(), itMin->second.end());
}
});
}
else {
PushBox(data, "avcC", [this](std::vector<uint8_t> &data) {
data.push_back(1);
data.push_back(m_sps[1]);
data.push_back(m_sps[2]);
data.push_back(m_sps[3]);
data.push_back(0xff);
data.push_back(0xe1);
PushUshort(data, static_cast<uint32_t>(m_sps.size()));
data.insert(data.end(), m_sps.begin(), m_sps.end());
data.push_back(static_cast<uint8_t>(m_ppsMap.size()));
if (m_ppsMap.empty()) {
fprintf(stderr, "Warning: No PPS was found when generating moov atom.\n");
}
for (int idMin = -1;;) {
// ascending order
auto itMin = m_ppsMap.end();
for (auto it = m_ppsMap.begin(); it != m_ppsMap.end(); ++it) {
if (it->first > idMin && (itMin == m_ppsMap.end() || itMin->first > it->first)) {
itMin = it;
}
}
if (itMin == m_ppsMap.end()) {
break;
}
idMin = itMin->first;
PushUshort(data, static_cast<uint32_t>(itMin->second.size()));
data.insert(data.end(), itMin->second.begin(), itMin->second.end());
}
if (m_sps[3] != 66 && m_sps[3] != 77 && m_sps[3] != 88) {
data.push_back(static_cast<uint8_t>(0xfc | m_chromaFormatIdc));
data.push_back(static_cast<uint8_t>(0xf8 | m_bitDepthLumaMinus8));
data.push_back(static_cast<uint8_t>(0xf8 | m_bitDepthChromaMinus8));
data.push_back(0);
}
});
}
});
});
PushFullBox(data, "stts", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
});
PushFullBox(data, "stsc", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
});
PushFullBox(data, "stsz", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
});
PushFullBox(data, "stco", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
});
});
});
});
});
}
if (m_aacProfile >= 0) {
PushBox(data, "trak", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "tkhd", 0x00000003, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, AUDIO_TRACK_ID);
PushUint(data, RESERVED_0);
PushUint(data, 0);
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushUshort(data, 0);
PushUshort(data, 1);
PushUshort(data, 0x0100);
PushUshort(data, RESERVED_0);
// Unity matrix
PushUint(data, 0x00010000);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0x00010000);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0x40000000);
PushUint(data, 0);
PushUint(data, 0);
});
PushBox(data, "mdia", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "mdhd", 0x00000000, [this](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, m_samplingFrequency);
PushUint(data, 0);
// "und"
PushUshort(data, 0x55c4);
PushUshort(data, PRE_DEFINED_0);
});
PushFullBox(data, "hdlr", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, PRE_DEFINED_0);
PushString(data, "soun");
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushString(data, "Audio Handler");
data.push_back(0);
});
PushBox(data, "minf", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "smhd", 0x00000000, [](std::vector<uint8_t> &data) {
PushUshort(data, 0);
PushUshort(data, RESERVED_0);
});
PushBox(data, "dinf", [](std::vector<uint8_t> &data) {
PushFullBox(data, "dref", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 1);
PushFullBox(data, "url ", 0x00000001, [](std::vector<uint8_t> &data) {
static_cast<void>(data);
});
});
});
PushBox(data, "stbl", [this](std::vector<uint8_t> &data) {
PushFullBox(data, "stsd", 0x00000000, [this](std::vector<uint8_t> &data) {
PushUint(data, 1);
PushBox(data, "mp4a", [this](std::vector<uint8_t> &data) {
for (int i = 0; i < 6; ++i) {
data.push_back(RESERVED_0);
}
PushUshort(data, 1);
PushUint(data, RESERVED_0);
PushUint(data, RESERVED_0);
PushUshort(data, m_channelConfiguration);
PushUshort(data, 16);
PushUint(data, RESERVED_0);
PushUshort(data, m_samplingFrequency);
PushUshort(data, 0);
PushFullBox(data, "esds", 0x00000000, [this](std::vector<uint8_t> &data) {
// ES_Descriptor {
data.push_back(0x03);
data.push_back(25);
PushUshort(data, 1);
data.push_back(0);
// DecoderConfigDescriptor {
data.push_back(0x04);
data.push_back(17);
data.push_back(0x40);
data.push_back(0x15);
data.push_back(0);
data.push_back(0);
data.push_back(0);
PushUint(data, 0);
PushUint(data, 0);
// DecoderSpecificInfo {
data.push_back(0x05);
data.push_back(2);
// (AudioSpecificConfig)
data.push_back(static_cast<uint8_t>(((m_aacProfile + 1) << 3) | (m_samplingFrequencyIndex >> 1)));
data.push_back(static_cast<uint8_t>(((m_samplingFrequencyIndex & 0x01) << 7) | (m_channelConfiguration << 3)));
// }}
// SLConfigDescriptor {
data.push_back(0x06);
data.push_back(1);
data.push_back(2);
// }}
});
});
});
PushFullBox(data, "stts", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
});
PushFullBox(data, "stsc", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
});
PushFullBox(data, "stsz", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
PushUint(data, 0);
});
PushFullBox(data, "stco", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, 0);
});
});
});
});
});
}
PushBox(data, "mvex", [this](std::vector<uint8_t> &data) {
if (m_codecWidth >= 0) {
PushFullBox(data, "trex", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, VIDEO_TRACK_ID);
PushUint(data, 1);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
});
}
if (m_aacProfile >= 0) {
PushFullBox(data, "trex", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, AUDIO_TRACK_ID);
PushUint(data, 1);
PushUint(data, 0);
PushUint(data, 0);
PushUint(data, 0);
});
}
});
});
}
void CMp4Fragmenter::PushMoof(std::vector<uint8_t> &data, std::pair<int, int> &fragDuration, uint32_t &fragCount) const
{
fragDuration.first = 0;
fragDuration.second = 1;
if (!m_videoSampleInfos.empty()) {
size_t moofBegin = data.size();
size_t offsetFieldPos = 0;
++fragCount;
PushBox(data, "moof", [this, fragCount, &fragDuration, &offsetFieldPos](std::vector<uint8_t> &data) {
PushFullBox(data, "mfhd", 0x00000000, [fragCount](std::vector<uint8_t> &data) {
PushUint(data, fragCount);
});
PushBox(data, "traf", [this, &fragDuration, &offsetFieldPos](std::vector<uint8_t> &data) {
PushFullBox(data, "tfhd", 0x00000000, [](std::vector<uint8_t> &data) {
PushUint(data, VIDEO_TRACK_ID);
});
PushFullBox(data, "tfdt", 0x01000000, [this](std::vector<uint8_t> &data) {
PushUint64(data, m_videoDecodeTime);
});
PushFullBox(data, "trun", 0x00000f01, [this, &fragDuration, &offsetFieldPos](std::vector<uint8_t> &data) {
PushUint(data, static_cast<uint32_t>(m_videoSampleInfos.size()));
offsetFieldPos = data.size();
PushUint(data, 0);
for (auto it = m_videoSampleInfos.begin(); it != m_videoSampleInfos.end(); ++it) {
auto itDuration = std::find_if(it, m_videoSampleInfos.end(),
[](const VIDEO_SAMPLE_INFO &a) { return a.sampleDuration >= 0; });
int duration = itDuration == m_videoSampleInfos.end() ? 3000 : itDuration->sampleDuration;
fragDuration.first += duration;
fragDuration.second = 90000;
PushUint(data, duration);
PushUint(data, it->sampleSize);
PushUint(data, it->isKey ? 0x02400000 : 0x01010000);
PushUint(data, it->compositionTimeOffsets);
}
});
});
});
PushBox(data, "mdat", [this, moofBegin, offsetFieldPos](std::vector<uint8_t> &data) {
WriteUint(&data[offsetFieldPos], static_cast<uint32_t>(data.size() - moofBegin));
data.insert(data.end(), m_videoMdat.begin(), m_videoMdat.end());
});
}
if (!m_audioSampleSizes.empty()) {
size_t moofBegin = data.size();
size_t offsetFieldPos = 0;
++fragCount;
PushBox(data, "moof", [this, fragCount, &fragDuration, &offsetFieldPos](std::vector<uint8_t> &data) {
PushFullBox(data, "mfhd", 0x00000000, [fragCount](std::vector<uint8_t> &data) {
PushUint(data, fragCount);
});
PushBox(data, "traf", [this, &fragDuration, &offsetFieldPos](std::vector<uint8_t> &data) {
PushFullBox(data, "tfhd", 0x00000028, [](std::vector<uint8_t> &data) {
PushUint(data, AUDIO_TRACK_ID);
PushUint(data, 1024);
PushUint(data, 0x02000000);
});
PushFullBox(data, "tfdt", 0x01000000, [this](std::vector<uint8_t> &data) {
PushUint64(data, m_audioDecodeTime * m_samplingFrequency / 90000);
});
PushFullBox(data, "trun", 0x00000201, [this, &fragDuration, &offsetFieldPos](std::vector<uint8_t> &data) {