mistserver/lib/mp4.cpp
2012-09-26 14:42:04 +02:00

562 lines
18 KiB
C++

#include <stdlib.h> //for malloc and free
#include <string.h> //for memcpy
#include <arpa/inet.h> //for htonl and friends
#include "mp4.h"
#include "json.h"
/// Contains all MP4 format related code.
namespace MP4{
Box::Box(size_t size) {
isUpdated = false;
data.resize( size + 8 );
}
Box::Box( const char* BoxType, size_t size ) {
isUpdated = false;
data.resize( size + 8 );
memcpy( (char*)data.c_str() + 4, BoxType, 4 );
}
Box::Box( std::string & newData ) {
isUpdated = false;
if( !read( newData ) ) {
clear();
}
}
Box::~Box() { }
std::string Box::getType() {
return data.substr(4,4);
}
bool Box::isType( char* boxType ) {
return !memcmp( boxType, data.c_str() + 4, 4 );
}
bool Box::read(std::string & newData) {
if( newData.size() > 4 ) {
size_t size = ntohl( ((int*)newData.c_str())[0] );
if( newData.size() > size + 8 ) {
data = newData.substr( 0, size + 8 );
newData.erase( 0, size + 8 );
return true;
}
}
return false;
}
size_t Box::boxedSize() {
return data.size();
}
size_t Box::payloadSize() {
return data.size() - 8;
}
std::string & Box::asBox() {
if( isUpdated ) {
regenerate( );
}
((int*)data.c_str())[0] = htonl( data.size() );
return data;
}
void Box::clear() {
data.resize( 8 );
}
std::string Box::toPrettyString(int indent){
return std::string(indent, ' ')+"Unimplemented pretty-printing for this box";
}
void Box::setInt8( char newData, size_t index ) {
index += 8;
if( index > data.size() ) {
data.resize( index );
}
data[index] = newData;
}
char Box::getInt8( size_t index ) {
index += 8;
if( index > data.size() ) {
data.resize( index );
}
return data[index];
}
void Box::setInt16( short newData, size_t index ) {
index += 8;
if( index + 1 > data.size() ) {
data.resize( index + 1 );
}
newData = htons( newData );
memcpy( (char*)data.c_str() + index, (char*)newData, 2 );
}
short Box::getInt16( size_t index ) {
index += 8;
if( index + 1 > data.size() ) {
data.resize( index + 1 );
}
short result;
memcpy( (char*)result, (char*)data.c_str() + index, 2 );
return ntohs(result);
}
void Box::setInt24( long newData, size_t index ) {
index += 8;
if( index + 2 > data.size() ) {
data.resize( index + 2 );
}
data[index] = (newData & 0x00FF0000) >> 16;
data[index+1] = (newData & 0x0000FF00) >> 8;
data[index+2] = (newData & 0x000000FF);
}
long Box::getInt24( size_t index ) {
index += 8;
if( index + 2 > data.size() ) {
data.resize( index + 2 );
}
long result = data[index];
result <<= 8;
result += data[index+1];
result <<= 8;
result += data[index+2];
return result;
}
void Box::setInt32( long newData, size_t index ) {
index += 8;
if( index + 3 > data.size() ) {
data.resize( index + 3 );
}
newData = htonl( newData );
memcpy( (char*)data.c_str() + index, (char*)newData, 4 );
}
long Box::getInt32( size_t index ) {
index += 8;
if( index + 3 > data.size() ) {
data.resize( index + 3 );
}
long result;
memcpy( (char*)result, (char*)data.c_str() + index, 4 );
return ntohl(result);
}
void Box::setInt64( long long int newData, size_t index ) {
index += 8;
if( index + 7 > data.size() ) {
data.resize( index + 7 );
}
data[index] = ( newData * 0xFF00000000000000 ) >> 56;
data[index+1] = ( newData * 0x00FF000000000000 ) >> 48;
data[index+2] = ( newData * 0x0000FF0000000000 ) >> 40;
data[index+3] = ( newData * 0x000000FF00000000 ) >> 32;
data[index+4] = ( newData * 0x00000000FF000000 ) >> 24;
data[index+5] = ( newData * 0x0000000000FF0000 ) >> 16;
data[index+6] = ( newData * 0x000000000000FF00 ) >> 8;
data[index+7] = ( newData * 0x00000000000000FF );
}
long long int Box::getInt64( size_t index ) {
index += 8;
if( index + 7 > data.size() ) {
data.resize( index + 7 );
}
long result = data[index];
result <<= 8;
result += data[index+1];
result <<= 8;
result += data[index+2];
result <<= 8;
result += data[index+3];
result <<= 8;
result += data[index+4];
result <<= 8;
result += data[index+5];
result <<= 8;
result += data[index+6];
result <<= 8;
result += data[index+7];
return result;
}
void Box::setString(std::string newData, size_t index ) {
setString( (char*)newData.c_str(), newData.size(), index );
}
void Box::setString(char* newData, size_t size, size_t index ) {
index += 8;
if( index + size > data.size() ) {
data.resize( index + size );
}
memcpy( (char*)data.c_str() + index, newData, size );
}
void Box::regenerate() {
std::cerr << "Regenerate() not implemented for this box type\n";
}
ABST::ABST( ) : Box("abst") {
setVersion( 0 );
setFlags( 0 );
setBootstrapinfoVersion( 0 );
setProfile( 0 );
setLive( 1 );
setUpdate( 0 );
setTimeScale( 1000 );
setCurrentMediaTime( 0 );
setSmpteTimeCodeOffset( 0 );
setMovieIdentifier( "" );
setDrmData( "" );
setMetaData( "" );
}
void ABST::setVersion( char newVersion ) {
setInt8( newVersion, 0 );
}
void ABST::setFlags( long newFlags ) {
setInt24( newFlags, 1 );
}
void ABST::setBootstrapinfoVersion( long newVersion ) {
setInt32( newVersion, 4 );
}
void ABST::setProfile( char newProfile ) {
setInt8( ( getInt8(5) & 0x3F ) + ( ( newProfile & 0x02 ) << 6 ), 5 );
}
void ABST::setLive( char newLive ) {
setInt8( ( getInt8(5) & 0xDF ) + ( ( newLive & 0x01 ) << 5 ), 5 );
}
void ABST::setUpdate( char newUpdate ) {
setInt8( ( getInt8(5) & 0xEF ) + ( ( newUpdate & 0x01 ) << 4 ), 5 );
}
void ABST::setTimeScale( long newScale ) {
setInt32( newScale, 6 );
}
void ABST::setCurrentMediaTime( long long int newTime ) {
setInt64( newTime, 10 );
}
void ABST::setSmpteTimeCodeOffset( long long int newTime ) {
setInt64( newTime, 18 );
}
void ABST::setMovieIdentifier( std::string newIdentifier ) {
movieIdentifier = newIdentifier;
}
void ABST::addServerEntry( std::string newEntry ) {
if( std::find( Servers.begin(), Servers.end(), newEntry ) == Servers.end() ) {
Servers.push_back( newEntry );
isUpdated = true;
}
}
void ABST::delServerEntry( std::string delEntry ) {
for( std::deque<std::string>::iterator it = Servers.begin(); it != Servers.end(); it++ ) {
if( (*it) == delEntry ) {
Servers.erase( it );
isUpdated = true;
break;
}
}
}
void ABST::addQualityEntry( std::string newEntry ) {
if( std::find( Qualities.begin(), Qualities.end(), newEntry ) == Qualities.end() ) {
Servers.push_back( newEntry );
isUpdated = true;
}
}
void ABST::delQualityEntry( std::string delEntry ) {
for( std::deque<std::string>::iterator it = Qualities.begin(); it != Qualities.end(); it++ ) {
if( (*it) == delEntry ) {
Qualities.erase( it );
isUpdated = true;
break;
}
}
}
void ABST::setDrmData( std::string newDrm ) {
drmData = newDrm;
isUpdated = true;
}
void ABST::setMetaData( std::string newMetaData ) {
metaData = newMetaData;
isUpdated = true;
}
void ABST::addSegmentRunTable( Box * newSegment ) {
segmentTables.push_back(newSegment);
isUpdated = true;
}
void ABST::addFragmentRunTable( Box * newFragment ) {
fragmentTables.push_back(newFragment);
isUpdated = true;
}
void ABST::regenerate( ) {
int myOffset = 26;
//0-terminated movieIdentifier
memcpy( (char*)data.c_str() + myOffset, movieIdentifier.c_str(), movieIdentifier.size() + 1);
myOffset += movieIdentifier.size() + 1;
//8-bit server amount
setInt8( Servers.size(), myOffset );
myOffset ++;
//0-terminated string for each entry
for( std::deque<std::string>::iterator it = Servers.begin(); it != Servers.end(); it++ ) {
memcpy( (char*)data.c_str() + myOffset, (*it).c_str(), (*it).size() + 1);
myOffset += (*it).size() + 1;
}
//8-bit quality amount
setInt8( Qualities.size(), myOffset );
myOffset ++;
//0-terminated string for each entry
for( std::deque<std::string>::iterator it = Qualities.begin();it != Qualities.end(); it++ ) {
memcpy( (char*)data.c_str() + myOffset, (*it).c_str(), (*it).size() + 1);
myOffset += (*it).size() + 1;
}
//0-terminated DrmData
memcpy( (char*)data.c_str() + myOffset, drmData.c_str(), drmData.size() + 1);
myOffset += drmData.size() + 1;
//0-terminated MetaData
memcpy( (char*)data.c_str() + myOffset, metaData.c_str(), metaData.size() + 1);
myOffset += metaData.size() + 1;
//8-bit segment run amount
setInt8( segmentTables.size(), myOffset );
myOffset ++;
//retrieve box for each entry
for( std::deque<Box*>::iterator it = segmentTables.begin(); it != segmentTables.end(); it++ ) {
memcpy( (char*)data.c_str() + myOffset, (*it)->asBox().c_str(), (*it)->boxedSize() );
myOffset += (*it)->boxedSize();
}
//8-bit fragment run amount
setInt8( fragmentTables.size(), myOffset );
myOffset ++;
//retrieve box for each entry
for( std::deque<Box*>::iterator it = fragmentTables.begin(); it != fragmentTables.end(); it++ ) {
memcpy( (char*)data.c_str() + myOffset, (*it)->asBox().c_str(), (*it)->boxedSize() + 1);
myOffset += (*it)->boxedSize();
}
isUpdated = false;
}
std::string ABST::toPrettyString( int indent ) {
std::string r;
r += std::string(indent, ' ')+"Bootstrap Info\n";
if( getInt8(5) & 0x10 ) {
r += std::string(indent+1, ' ')+"Update\n";
} else {
r += std::string(indent+1, ' ')+"Replacement or new table\n";
}
if( getInt8(5) & 0x20 ) {
r += std::string(indent+1, ' ' )+"Live\n";
}else{
r += std::string(indent+1, ' ' )+"Recorded\n";
}
r += std::string(indent+1, ' ')+"Profile "+JSON::Value((long long int)( getInt8(5) & 0xC0 ) ).asString()+"\n";
r += std::string(indent+1, ' ')+"Timescale "+JSON::Value((long long int)getInt64(10)).asString()+"\n";
r += std::string(indent+1, ' ')+"CurrMediaTime "+JSON::Value((long long int)getInt32(6)).asString()+"\n";
r += std::string(indent+1, ' ')+"Segment Run Tables "+JSON::Value((long long int)segmentTables.size()).asString()+"\n";
for( uint32_t i = 0; i < segmentTables.size(); i++ ) {
r += ((ASRT*)segmentTables[i])->toPrettyString(indent+2)+"\n";
}
r += std::string(indent+1, ' ')+"Fragment Run Tables "+JSON::Value((long long int)fragmentTables.size()).asString()+"\n";
for( uint32_t i = 0; i < fragmentTables.size(); i++ ) {
r += ((AFRT*)fragmentTables[i])->toPrettyString(indent+2)+"\n";
}
return r;
}
AFTR::AFRT() : Box(0x61667274){
setVersion( 0 );
setUpdate( 0 );
setTimeScale( 1000 );
}
void AFRT::setVersion( char newVersion ) {
setInt8( newVersion ,0 )
}
void AFRT::setUpdate( long newUpdate ) {
setInt24( newUpdate, 1 );
}
void AFRT::setTimeScale( long newScale ) {
setInt32( newScale, 4 );
}
void AFRT::addQualityEntry( std::string newQuality ) {
qualityModifiers.push_back( newQuality );
}
/*
void AFRT::AddQualityEntry( std::string Quality, uint32_t Offset ) {
if(Offset >= QualitySegmentUrlModifiers.size()) {
QualitySegmentUrlModifiers.resize(Offset+1);
}
QualitySegmentUrlModifiers[Offset] = Quality;
}
void AFRT::AddFragmentRunEntry( uint32_t FirstFragment, uint32_t FirstFragmentTimestamp, uint32_t FragmentsDuration, uint8_t Discontinuity, uint32_t Offset ) {
if( Offset >= FragmentRunEntryTable.size() ) {
FragmentRunEntryTable.resize(Offset+1);
}
FragmentRunEntryTable[Offset].FirstFragment = FirstFragment;
FragmentRunEntryTable[Offset].FirstFragmentTimestamp = FirstFragmentTimestamp;
FragmentRunEntryTable[Offset].FragmentDuration = FragmentsDuration;
if( FragmentsDuration == 0) {
FragmentRunEntryTable[Offset].DiscontinuityIndicator = Discontinuity;
}
}
void AFRT::SetDefaults( ) {
SetUpdate( );
SetTimeScale( );
}
void AFRT::SetTimeScale( uint32_t Scale ) {
curTimeScale = Scale;
}
void AFRT::WriteContent( ) {
std::string serializedQualities = "";
std::string serializedFragmentEntries = "";
clear();
for( uint32_t i = 0; i < QualitySegmentUrlModifiers.size(); i++ ) {
serializedQualities.append(QualitySegmentUrlModifiers[i].c_str());
serializedQualities += '\0';
}
for( uint32_t i = 0; i < FragmentRunEntryTable.size(); i ++ ) {
serializedFragmentEntries.append((char*)Box::uint32_to_uint8(FragmentRunEntryTable[i].FirstFragment),4);
serializedFragmentEntries.append((char*)Box::uint32_to_uint8(0),4);
serializedFragmentEntries.append((char*)Box::uint32_to_uint8(FragmentRunEntryTable[i].FirstFragmentTimestamp),4);
serializedFragmentEntries.append((char*)Box::uint32_to_uint8(FragmentRunEntryTable[i].FragmentDuration),4);
if(FragmentRunEntryTable[i].FragmentDuration == 0) {
serializedFragmentEntries.append((char*)Box::uint8_to_uint8(FragmentRunEntryTable[i].DiscontinuityIndicator),1);
}
}
uint32_t OffsetFragmentRunEntryCount = 9 + serializedQualities.size();
SetPayload((uint32_t)serializedFragmentEntries.size(),(uint8_t*)serializedFragmentEntries.c_str(),OffsetFragmentRunEntryCount+4);
SetPayload((uint32_t)4,Box::uint32_to_uint8(FragmentRunEntryTable.size()),OffsetFragmentRunEntryCount);
SetPayload((uint32_t)serializedQualities.size(),(uint8_t*)serializedQualities.c_str(),9);
SetPayload((uint32_t)1,Box::uint8_to_uint8(QualitySegmentUrlModifiers.size()),8);
SetPayload((uint32_t)4,Box::uint32_to_uint8(curTimeScale),4);
SetPayload((uint32_t)4,Box::uint32_to_uint8((isUpdate ? 1 : 0)));
}
std::string AFRT::toPrettyString(int indent){
std::string r;
r += std::string(indent, ' ')+"Fragment Run Table\n";
if (isUpdate){
r += std::string(indent+1, ' ')+"Update\n";
}else{
r += std::string(indent+1, ' ')+"Replacement or new table\n";
}
r += std::string(indent+1, ' ')+"Timescale "+JSON::Value((long long int)curTimeScale).asString()+"\n";
r += std::string(indent+1, ' ')+"Qualities "+JSON::Value((long long int)QualitySegmentUrlModifiers.size()).asString()+"\n";
for( uint32_t i = 0; i < QualitySegmentUrlModifiers.size(); i++ ) {
r += std::string(indent+2, ' ')+"\""+QualitySegmentUrlModifiers[i]+"\"\n";
}
r += std::string(indent+1, ' ')+"Fragments "+JSON::Value((long long int)FragmentRunEntryTable.size()).asString()+"\n";
for( uint32_t i = 0; i < FragmentRunEntryTable.size(); i ++ ) {
r += std::string(indent+2, ' ')+"Duration "+JSON::Value((long long int)FragmentRunEntryTable[i].FragmentDuration).asString()+", starting at "+JSON::Value((long long int)FragmentRunEntryTable[i].FirstFragment).asString()+" @ "+JSON::Value((long long int)FragmentRunEntryTable[i].FirstFragmentTimestamp).asString();
}
return r;
}
void ASRT::SetUpdate( bool Update ) {
isUpdate = Update;
}
void ASRT::AddQualityEntry( std::string Quality, uint32_t Offset ) {
if(Offset >= QualitySegmentUrlModifiers.size()) {
QualitySegmentUrlModifiers.resize(Offset+1);
}
QualitySegmentUrlModifiers[Offset] = Quality;
}
void ASRT::AddSegmentRunEntry( uint32_t FirstSegment, uint32_t FragmentsPerSegment, uint32_t Offset ) {
if( Offset >= SegmentRunEntryTable.size() ) {
SegmentRunEntryTable.resize(Offset+1);
}
SegmentRunEntryTable[Offset].FirstSegment = FirstSegment;
SegmentRunEntryTable[Offset].FragmentsPerSegment = FragmentsPerSegment;
}
void ASRT::SetVersion( bool NewVersion ) {
Version = NewVersion;
}
void ASRT::SetDefaults( ) {
SetUpdate( );
}
void ASRT::WriteContent( ) {
std::string serializedQualities = "";
ResetPayload( );
for( uint32_t i = 0; i < QualitySegmentUrlModifiers.size(); i++ ) {
serializedQualities.append(QualitySegmentUrlModifiers[i].c_str());
serializedQualities += '\0';
}
uint32_t OffsetSegmentRunEntryCount = 5 + serializedQualities.size();
for( uint32_t i = 0; i < SegmentRunEntryTable.size(); i ++ ) {
SetPayload((uint32_t)4,Box::uint32_to_uint8(SegmentRunEntryTable[i].FragmentsPerSegment),(8*i)+OffsetSegmentRunEntryCount+8);
SetPayload((uint32_t)4,Box::uint32_to_uint8(SegmentRunEntryTable[i].FirstSegment),(8*i)+OffsetSegmentRunEntryCount+4);
}
SetPayload((uint32_t)4,Box::uint32_to_uint8(SegmentRunEntryTable.size()),OffsetSegmentRunEntryCount);
SetPayload((uint32_t)serializedQualities.size(),(uint8_t*)serializedQualities.c_str(),5);
SetPayload((uint32_t)1,Box::uint8_to_uint8(QualitySegmentUrlModifiers.size()),4);
SetPayload((uint32_t)4,Box::uint32_to_uint8((isUpdate ? 1 : 0)));
}
std::string ASRT::toPrettyString(int indent){
std::string r;
r += std::string(indent, ' ')+"Segment Run Table\n";
if (isUpdate){
r += std::string(indent+1, ' ')+"Update\n";
}else{
r += std::string(indent+1, ' ')+"Replacement or new table\n";
}
r += std::string(indent+1, ' ')+"Qualities "+JSON::Value((long long int)QualitySegmentUrlModifiers.size()).asString()+"\n";
for( uint32_t i = 0; i < QualitySegmentUrlModifiers.size(); i++ ) {
r += std::string(indent+2, ' ')+"\""+QualitySegmentUrlModifiers[i]+"\"\n";
}
r += std::string(indent+1, ' ')+"Segments "+JSON::Value((long long int)SegmentRunEntryTable.size()).asString()+"\n";
for( uint32_t i = 0; i < SegmentRunEntryTable.size(); i ++ ) {
r += std::string(indent+2, ' ')+JSON::Value((long long int)SegmentRunEntryTable[i].FragmentsPerSegment).asString()+" fragments per, starting at "+JSON::Value((long long int)SegmentRunEntryTable[i].FirstSegment).asString();
}
return r;
}
*/
};