michael@0: // Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0: //
michael@0: // Use of this source code is governed by a BSD-style license
michael@0: // that can be found in the LICENSE file in the root of the source
michael@0: // tree. An additional intellectual property rights grant can be found
michael@0: // in the file PATENTS.  All contributing project authors may
michael@0: // be found in the AUTHORS file in the root of the source tree.
michael@0: 
michael@0: #include "EbmlIDs.h"
michael@0: #include "WebMElement.h"
michael@0: #include <stdio.h>
michael@0: #include <stdint.h>
michael@0: #include <stdlib.h>
michael@0: #include <time.h>
michael@0: 
michael@0: #define kVorbisPrivateMaxSize  4000
michael@0: #define UInt64 uint64_t
michael@0: 
michael@0: void writeHeader(EbmlGlobal *glob) {
michael@0:   EbmlLoc start;
michael@0:   Ebml_StartSubElement(glob, &start, EBML);
michael@0:   Ebml_SerializeUnsigned(glob, EBMLVersion, 1);
michael@0:   Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1); // EBML Read Version
michael@0:   Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4); // EBML Max ID Length
michael@0:   Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8); // EBML Max Size Length
michael@0:   Ebml_SerializeString(glob, DocType, "webm"); // Doc Type
michael@0:   Ebml_SerializeUnsigned(glob, DocTypeVersion, 2); // Doc Type Version
michael@0:   Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2); // Doc Type Read Version
michael@0:   Ebml_EndSubElement(glob, &start);
michael@0: }
michael@0: 
michael@0: void writeSimpleBlock(EbmlGlobal *glob, unsigned char trackNumber, short timeCode,
michael@0:                       int isKeyframe, unsigned char lacingFlag, int discardable,
michael@0:                       unsigned char *data, unsigned long dataLength) {
michael@0:   unsigned long blockLength = 4 + dataLength;
michael@0:   unsigned char flags = 0x00 | (isKeyframe ? 0x80 : 0x00) | (lacingFlag << 1) | discardable;
michael@0:   Ebml_WriteID(glob, SimpleBlock);
michael@0:   blockLength |= 0x10000000; // TODO check length < 0x0FFFFFFFF
michael@0:   Ebml_Serialize(glob, &blockLength, sizeof(blockLength), 4);
michael@0:   trackNumber |= 0x80;  // TODO check track nubmer < 128
michael@0:   Ebml_Write(glob, &trackNumber, 1);
michael@0:   // Ebml_WriteSigned16(glob, timeCode,2); //this is 3 bytes
michael@0:   Ebml_Serialize(glob, &timeCode, sizeof(timeCode), 2);
michael@0:   flags = 0x00 | (isKeyframe ? 0x80 : 0x00) | (lacingFlag << 1) | discardable;
michael@0:   Ebml_Write(glob, &flags, 1);
michael@0:   Ebml_Write(glob, data, dataLength);
michael@0: }
michael@0: 
michael@0: static UInt64 generateTrackID(unsigned int trackNumber) {
michael@0:   UInt64 t = time(NULL) * trackNumber;
michael@0:   UInt64 r = rand();
michael@0:   r = r << 32;
michael@0:   r +=  rand();
michael@0: //  UInt64 rval = t ^ r;
michael@0:   return t ^ r;
michael@0: }
michael@0: 
michael@0: void writeVideoTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing,
michael@0:                      const char *codecId, unsigned int pixelWidth, unsigned int pixelHeight,
michael@0:                      unsigned int displayWidth, unsigned int displayHeight,
michael@0:                      double frameRate) {
michael@0:   EbmlLoc start;
michael@0:   UInt64 trackID;
michael@0:   Ebml_StartSubElement(glob, &start, TrackEntry);
michael@0:   Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
michael@0:   trackID = generateTrackID(trackNumber);
michael@0:   Ebml_SerializeUnsigned(glob, TrackUID, trackID);
michael@0:   Ebml_SerializeString(glob, CodecName, "VP8");  // TODO shouldn't be fixed
michael@0: 
michael@0:   Ebml_SerializeUnsigned(glob, TrackType, 1); // video is always 1
michael@0:   Ebml_SerializeString(glob, CodecID, codecId);
michael@0:   {
michael@0:     EbmlLoc videoStart;
michael@0:     Ebml_StartSubElement(glob, &videoStart, Video);
michael@0:     Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth);
michael@0:     Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight);
michael@0:     if (pixelWidth != displayWidth) {
michael@0:       Ebml_SerializeUnsigned(glob, DisplayWidth, displayWidth);
michael@0:     }
michael@0:     if (pixelHeight != displayHeight) {
michael@0:       Ebml_SerializeUnsigned(glob, DisplayHeight, displayHeight);
michael@0:     }
michael@0:     Ebml_SerializeFloat(glob, FrameRate, frameRate);
michael@0:     Ebml_EndSubElement(glob, &videoStart); // Video
michael@0:   }
michael@0:   Ebml_EndSubElement(glob, &start); // Track Entry
michael@0: }
michael@0: void writeAudioTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing,
michael@0:                      const char *codecId, double samplingFrequency, unsigned int channels,
michael@0:                      unsigned char *private, unsigned long privateSize) {
michael@0:   EbmlLoc start;
michael@0:   UInt64 trackID;
michael@0:   Ebml_StartSubElement(glob, &start, TrackEntry);
michael@0:   Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber);
michael@0:   trackID = generateTrackID(trackNumber);
michael@0:   Ebml_SerializeUnsigned(glob, TrackUID, trackID);
michael@0:   Ebml_SerializeUnsigned(glob, TrackType, 2); // audio is always 2
michael@0:   // I am using defaults for thesed required fields
michael@0:   /*  Ebml_SerializeUnsigned(glob, FlagEnabled, 1);
michael@0:       Ebml_SerializeUnsigned(glob, FlagDefault, 1);
michael@0:       Ebml_SerializeUnsigned(glob, FlagForced, 1);
michael@0:       Ebml_SerializeUnsigned(glob, FlagLacing, flagLacing);*/
michael@0:   Ebml_SerializeString(glob, CodecID, codecId);
michael@0:   Ebml_SerializeData(glob, CodecPrivate, private, privateSize);
michael@0: 
michael@0:   Ebml_SerializeString(glob, CodecName, "VORBIS");  // fixed for now
michael@0:   {
michael@0:     EbmlLoc AudioStart;
michael@0:     Ebml_StartSubElement(glob, &AudioStart, Audio);
michael@0:     Ebml_SerializeFloat(glob, SamplingFrequency, samplingFrequency);
michael@0:     Ebml_SerializeUnsigned(glob, Channels, channels);
michael@0:     Ebml_EndSubElement(glob, &AudioStart);
michael@0:   }
michael@0:   Ebml_EndSubElement(glob, &start);
michael@0: }
michael@0: void writeSegmentInformation(EbmlGlobal *ebml, EbmlLoc *startInfo, unsigned long timeCodeScale, double duration) {
michael@0:   Ebml_StartSubElement(ebml, startInfo, Info);
michael@0:   Ebml_SerializeUnsigned(ebml, TimecodeScale, timeCodeScale);
michael@0:   Ebml_SerializeFloat(ebml, Segment_Duration, duration * 1000.0); // Currently fixed to using milliseconds
michael@0:   Ebml_SerializeString(ebml, 0x4D80, "QTmuxingAppLibWebM-0.0.1");
michael@0:   Ebml_SerializeString(ebml, 0x5741, "QTwritingAppLibWebM-0.0.1");
michael@0:   Ebml_EndSubElement(ebml, startInfo);
michael@0: }
michael@0: 
michael@0: /*
michael@0: void Mkv_InitializeSegment(Ebml& ebml_out, EbmlLoc& ebmlLoc)
michael@0: {
michael@0:     Ebml_StartSubElement(ebml_out, ebmlLoc, 0x18538067);
michael@0: }
michael@0: 
michael@0: void Mkv_InitializeSeek(Ebml& ebml_out, EbmlLoc& ebmlLoc)
michael@0: {
michael@0:     Ebml_StartSubElement(ebml_out, ebmlLoc, 0x114d9b74);
michael@0: }
michael@0: void Mkv_WriteSeekInformation(Ebml& ebml_out, SeekStruct& seekInformation)
michael@0: {
michael@0:     EbmlLoc ebmlLoc;
michael@0:     Ebml_StartSubElement(ebml_out, ebmlLoc, 0x4dbb);
michael@0:     Ebml_SerializeString(ebml_out, 0x53ab, seekInformation.SeekID);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x53ac, seekInformation.SeekPosition);
michael@0:     Ebml_EndSubElement(ebml_out, ebmlLoc);
michael@0: }
michael@0: 
michael@0: void Mkv_WriteSegmentInformation(Ebml& ebml_out, SegmentInformationStruct& segmentInformation)
michael@0: {
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x73a4, segmentInformation.segmentUID);
michael@0:     if (segmentInformation.filename != 0)
michael@0:         Ebml_SerializeString(ebml_out, 0x7384, segmentInformation.filename);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x2AD7B1, segmentInformation.TimecodeScale);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x4489, segmentInformation.Duration);
michael@0:     // TODO date
michael@0:     Ebml_SerializeWString(ebml_out, 0x4D80, L"MKVMUX");
michael@0:     Ebml_SerializeWString(ebml_out, 0x5741, segmentInformation.WritingApp);
michael@0: }
michael@0: 
michael@0: void Mkv_InitializeTrack(Ebml& ebml_out, EbmlLoc& ebmlLoc)
michael@0: {
michael@0:     Ebml_StartSubElement(ebml_out, ebmlLoc, 0x1654AE6B);
michael@0: }
michael@0: 
michael@0: static void Mkv_WriteGenericTrackData(Ebml& ebml_out, TrackStruct& track)
michael@0: {
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0xD7, track.TrackNumber);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x73C5, track.TrackUID);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x83, track.TrackType);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0xB9, track.FlagEnabled ? 1 :0);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x88, track.FlagDefault ? 1 :0);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x55AA, track.FlagForced ? 1 :0);
michael@0:     if (track.Language != 0)
michael@0:         Ebml_SerializeString(ebml_out, 0x22B59C, track.Language);
michael@0:     if (track.CodecID != 0)
michael@0:         Ebml_SerializeString(ebml_out, 0x86, track.CodecID);
michael@0:     if (track.CodecPrivate != 0)
michael@0:         Ebml_SerializeData(ebml_out, 0x63A2, track.CodecPrivate, track.CodecPrivateLength);
michael@0:     if (track.CodecName != 0)
michael@0:         Ebml_SerializeWString(ebml_out, 0x258688, track.CodecName);
michael@0: }
michael@0: 
michael@0: void Mkv_WriteVideoTrack(Ebml& ebml_out, TrackStruct & track, VideoTrackStruct& video)
michael@0: {
michael@0:     EbmlLoc trackHeadLoc, videoHeadLoc;
michael@0:     Ebml_StartSubElement(ebml_out, trackHeadLoc, 0xAE);  // start Track
michael@0:     Mkv_WriteGenericTrackData(ebml_out, track);
michael@0:     Ebml_StartSubElement(ebml_out, videoHeadLoc, 0xE0);  // start Video
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x9A, video.FlagInterlaced ? 1 :0);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0xB0, video.PixelWidth);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0xBA, video.PixelHeight);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x54B0, video.PixelDisplayWidth);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x54BA, video.PixelDisplayHeight);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x54B2, video.displayUnit);
michael@0:     Ebml_SerializeFloat(ebml_out, 0x2383E3, video.FrameRate);
michael@0:     Ebml_EndSubElement(ebml_out, videoHeadLoc);
michael@0:     Ebml_EndSubElement(ebml_out, trackHeadLoc);
michael@0: 
michael@0: }
michael@0: 
michael@0: void Mkv_WriteAudioTrack(Ebml& ebml_out, TrackStruct & track, AudioTrackStruct& video)
michael@0: {
michael@0:     EbmlLoc trackHeadLoc, audioHeadLoc;
michael@0:     Ebml_StartSubElement(ebml_out, trackHeadLoc, 0xAE);
michael@0:     Mkv_WriteGenericTrackData(ebml_out, track);
michael@0:     Ebml_StartSubElement(ebml_out, audioHeadLoc, 0xE0);  // start Audio
michael@0:     Ebml_SerializeFloat(ebml_out, 0xB5, video.SamplingFrequency);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x9F, video.Channels);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x6264, video.BitDepth);
michael@0:     Ebml_EndSubElement(ebml_out, audioHeadLoc); // end audio
michael@0:     Ebml_EndSubElement(ebml_out, trackHeadLoc);
michael@0: }
michael@0: 
michael@0: void Mkv_WriteEbmlClusterHead(Ebml& ebml_out,  EbmlLoc& ebmlLoc, ClusterHeadStruct & clusterHead)
michael@0: {
michael@0:     Ebml_StartSubElement(ebml_out, ebmlLoc, 0x1F43B675);
michael@0:     Ebml_SerializeUnsigned(ebml_out, 0x6264, clusterHead.TimeCode);
michael@0: }
michael@0: 
michael@0: void Mkv_WriteSimpleBlockHead(Ebml& ebml_out,  EbmlLoc& ebmlLoc, SimpleBlockStruct& block)
michael@0: {
michael@0:     Ebml_StartSubElement(ebml_out, ebmlLoc, 0xA3);
michael@0:     Ebml_Write1UInt(ebml_out, block.TrackNumber);
michael@0:     Ebml_WriteSigned16(ebml_out,block.TimeCode);
michael@0:     unsigned char flags = 0x00 | (block.iskey ? 0x80:0x00) | (block.lacing << 1) | block.discardable;
michael@0:     Ebml_Write1UInt(ebml_out, flags);  // TODO this may be the wrong function
michael@0:     Ebml_Serialize(ebml_out, block.data, block.dataLength);
michael@0:     Ebml_EndSubElement(ebml_out,ebmlLoc);
michael@0: }
michael@0: */