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ffmpeg.wasm-core
Commit e45ccf79 authored by Gildas Bazin's avatar Gildas Bazin Committed by Michael Niedermayer
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movenc patch by (Gildas Bazin <gbazin at altern dot org>) 

Originally committed as revision 2476 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 75388c74
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Showing with 215 additions and 171 deletions
libavformat/movenc.c
View file @ e45ccf79
/*
* MOV, 3GP, MP4 encoder.
* Copyright (c) 2003 Thomas Raivio.
* Enhancements by Gildas Bazin <gbazin@netcourrier.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
......@@ -28,22 +29,21 @@
#define globalTimescale 1000
typedef struct MOVIentry {
unsigned int flags, pos, len;
unsigned int chunkSize;
unsigned int flags, pos, size;
unsigned int samplesInChunk;
char key_frame;
unsigned int entries;
} MOVIentry;
typedef struct MOVIndex {
int entry;
int samples;
int mdat_size;
int ents_allocated;
long timescale;
long time;
long frameCount;
long trackDuration;
long sampleDelta;
long sampleCount;
long sampleDuration;
int hasKeyframes;
int trackID;
AVCodecContext *enc;
......@@ -63,6 +63,8 @@ typedef struct {
MOVTrack tracks[MAX_STREAMS];
} MOVContext;
static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track);
//FIXME supprt 64bit varaint with wide placeholders
static int updateSize (ByteIOContext *pb, int pos)
{
......@@ -74,6 +76,7 @@ static int updateSize (ByteIOContext *pb, int pos)
return curpos - pos;
}
/* Chunk offset atom */
static int mov_write_stco_tag(ByteIOContext *pb, MOVTrack* track)
{
int i;
......@@ -90,10 +93,11 @@ static int mov_write_stco_tag(ByteIOContext *pb, MOVTrack* track)
return updateSize (pb, pos);
}
/* Sample size atom */
static int mov_write_stsz_tag(ByteIOContext *pb, MOVTrack* track)
{
int equalChunks = 1;
int i, tst = -1, oldtst = -1;
int i, j, entries = 0, tst = -1, oldtst = -1;
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
......@@ -103,32 +107,34 @@ static int mov_write_stsz_tag(ByteIOContext *pb, MOVTrack* track)
for (i=0; i<track->entry; i++) {
int cl = i / MOV_INDEX_CLUSTER_SIZE;
int id = i % MOV_INDEX_CLUSTER_SIZE;
tst = track->cluster[cl][id].len;
if(oldtst != -1 && tst != oldtst) {
equalChunks = 0;
break;
tst = track->cluster[cl][id].size/track->cluster[cl][id].entries;
if(oldtst != -1 && tst != oldtst) {
equalChunks = 0;
}
oldtst = tst;
entries += track->cluster[cl][id].entries;
}
if(equalChunks ||
track->enc->codec_type == CODEC_TYPE_AUDIO) {
//int sSize = track->cluster[0][0].len/track->cluster[0][0].entries;
int sSize = track->cluster[0][0].len;
if (equalChunks) {
int sSize = track->cluster[0][0].size/track->cluster[0][0].entries;
put_be32(pb, sSize); // sample size
put_be32(pb, track->samples/track->enc->channels); // sample count
put_be32(pb, entries); // sample count
}
else {
put_be32(pb, 0); // sample size
put_be32(pb, track->entry); // sample count
put_be32(pb, entries); // sample count
for (i=0; i<track->entry; i++) {
int cl = i / MOV_INDEX_CLUSTER_SIZE;
int id = i % MOV_INDEX_CLUSTER_SIZE;
put_be32(pb, track->cluster[cl][id].len);
for ( j=0; j<track->cluster[cl][id].entries; j++) {
put_be32(pb, track->cluster[cl][id].size /
track->cluster[cl][id].entries);
}
}
}
return updateSize (pb, pos);
}
/* Sample to chunk atom */
static int mov_write_stsc_tag(ByteIOContext *pb, MOVTrack* track)
{
int index = 0, oldval = -1, i, entryPos, curpos;
......@@ -142,12 +148,12 @@ static int mov_write_stsc_tag(ByteIOContext *pb, MOVTrack* track)
for (i=0; i<track->entry; i++) {
int cl = i / MOV_INDEX_CLUSTER_SIZE;
int id = i % MOV_INDEX_CLUSTER_SIZE;
if(oldval != track->cluster[cl][id].chunkSize)
if(oldval != track->cluster[cl][id].samplesInChunk)
{
put_be32(pb, i+1); // first chunk
put_be32(pb, track->cluster[cl][id].chunkSize);
put_be32(pb, track->cluster[cl][id].samplesInChunk); // samples per chunk
put_be32(pb, 0x1); // sample description index
oldval = track->cluster[cl][id].chunkSize;
oldval = track->cluster[cl][id].samplesInChunk;
index++;
}
}
......@@ -159,6 +165,7 @@ static int mov_write_stsc_tag(ByteIOContext *pb, MOVTrack* track)
return updateSize (pb, pos);
}
/* Sync sample atom */
static int mov_write_stss_tag(ByteIOContext *pb, MOVTrack* track)
{
long curpos;
......@@ -223,18 +230,22 @@ static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)
put_be32(pb, 0); /* Reserved */
put_be16(pb, 0); /* Reserved */
put_be16(pb, 1); /* Data-reference index, XXX == 1 */
put_be32(pb, 0); /* Reserved */
/* SoundDescription */
put_be16(pb, 0); /* Version */
put_be16(pb, 0); /* Revision level */
put_be32(pb, 0); /* Reserved */
put_be16(pb, track->enc->channels); /* Number of channels */
/* TODO: Currently hard-coded to 16-bit, there doesn't seem
to be a good way to get number of bits of audio */
to be a good way to get number of bits of audio */
put_be16(pb, 0x10); /* Reserved */
put_be16(pb, 0); /* compression ID (= 0) */
put_be16(pb, 0); /* packet size (= 0) */
put_be16(pb, track->timescale); /* Time scale */
put_be16(pb, 0); /* Reserved */
if(track->enc->codec_id == CODEC_ID_AAC)
mov_write_esds_tag(pb, track);
if(track->enc->codec_id == CODEC_ID_AMR_NB)
mov_write_damr_tag(pb);
return updateSize (pb, pos);
......@@ -263,36 +274,86 @@ static int mov_write_svq3_tag(ByteIOContext *pb)
return 0x15;
}
static unsigned int esdsLength(unsigned int len)
static unsigned int descrLength(unsigned int len)
{
if (len < 0x00000080)
return 2 + len;
else if (len < 0x00004000)
return 3 + len;
else if(len < 0x00200000)
return 4 + len;
else
return 5 + len;
}
static void putDescr(ByteIOContext *pb, int tag, int size)
{
unsigned int result = 0;
unsigned char b = len & 0x7f;
result += b;
b = (len >> 8) & 0x7f;
result += (b + 0x80) << 8;
b = (len >> 16) & 0x7f;
result += (b + 0x80) << 16;
b = (len >> 24) & 0x7f;
result += (b + 0x80) << 24;
return result;
uint32_t len;
uint8_t vals[4];
len = size;
vals[3] = (uint8_t)(len & 0x7f);
len >>= 7;
vals[2] = (uint8_t)((len & 0x7f) | 0x80);
len >>= 7;
vals[1] = (uint8_t)((len & 0x7f) | 0x80);
len >>= 7;
vals[0] = (uint8_t)((len & 0x7f) | 0x80);
put_byte(pb, tag); // DescriptorTag
if (size < 0x00000080)
{
put_byte(pb, vals[3]);
}
else if (size < 0x00004000)
{
put_byte(pb, vals[2]);
put_byte(pb, vals[3]);
}
else if (size < 0x00200000)
{
put_byte(pb, vals[1]);
put_byte(pb, vals[2]);
put_byte(pb, vals[3]);
}
else if (size < 0x10000000)
{
put_byte(pb, vals[0]);
put_byte(pb, vals[1]);
put_byte(pb, vals[2]);
put_byte(pb, vals[3]);
}
}
static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic
{
put_be32(pb, track->vosLen+18+14+17);
int decoderSpecificInfoLen = track->vosLen ? descrLength(track->vosLen):0;
int pos = url_ftell(pb);
put_be32(pb, 0); // size
put_tag(pb, "esds");
put_be32(pb, 0); // Version
put_be32(pb, 0); // Version
put_byte(pb, 0x03); // tag = ES_DescriptorTag
put_be32(pb, esdsLength(track->vosLen+18+14)); // Length
put_be16(pb, 0x0001); // ID (= 1)
// ES descriptor
putDescr(pb, 0x03, 3 + descrLength(13 + decoderSpecificInfoLen) +
descrLength(1));
put_be16(pb, 0x0001); // ID (= 1)
put_byte(pb, 0x00); // flags (= no flags)
// Decoderconfigdescriptor = 4
put_byte(pb, 0x04); // tag = DecoderConfigDescriptor
put_be32(pb, esdsLength(track->vosLen+18)); // Length
put_byte(pb, 0x20); // Object type indication (Visual 14496-2)
put_byte(pb, 0x11); // flags (= Visualstream)
// DecoderConfig descriptor
putDescr(pb, 0x04, 13 + decoderSpecificInfoLen);
if(track->enc->codec_id == CODEC_ID_AAC)
put_byte(pb, 0x40); // Object type indication
else if(track->enc->codec_id == CODEC_ID_MPEG4)
put_byte(pb, 0x20); // Object type indication (Visual 14496-2)
if(track->enc->codec_type == CODEC_TYPE_AUDIO)
put_byte(pb, 0x15); // flags (= Audiostream)
else
put_byte(pb, 0x11); // flags (= Visualstream)
put_byte(pb, 0x0); // Buffersize DB (24 bits)
put_be16(pb, 0x0dd2); // Buffersize DB
......@@ -300,15 +361,17 @@ static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic
put_be32(pb, 0x0002e918); // maxbitrate
put_be32(pb, 0x00017e6b); // avg bitrate
// Decoderspecific info Tag = 5
put_byte(pb, 0x05); // tag = Decoderspecific info
put_be32(pb, esdsLength(track->vosLen)); // length
put_buffer(pb, track->vosData, track->vosLen);
put_byte(pb, 0x06);
put_be32(pb, esdsLength(1)); // length
if (track->vosLen)
{
// DecoderSpecific info descriptor
putDescr(pb, 0x05, track->vosLen);
put_buffer(pb, track->vosData, track->vosLen);
}
// SL descriptor
putDescr(pb, 0x06, descrLength(1));
put_byte(pb, 0x02);
return track->vosLen+18+14+17;
return updateSize (pb, pos);
}
static int mov_write_video_tag(ByteIOContext *pb, MOVTrack* track)
......@@ -376,6 +439,7 @@ static int mov_write_stsd_tag(ByteIOContext *pb, MOVTrack* track)
}
/* TODO?: Currently all samples/frames seem to have same duration */
/* Time to sample atom */
static int mov_write_stts_tag(ByteIOContext *pb, MOVTrack* track)
{
put_be32(pb, 0x18); /* size */
......@@ -383,8 +447,8 @@ static int mov_write_stts_tag(ByteIOContext *pb, MOVTrack* track)
put_be32(pb, 0); /* version & flags */
put_be32(pb, 1); /* entry count */
put_be32(pb, track->frameCount); /* sample count */
put_be32(pb, track->sampleDelta); /* sample delta */
put_be32(pb, track->sampleCount); /* sample count */
put_be32(pb, track->sampleDuration); /* sample duration */
return 0x18;
}
......@@ -491,15 +555,8 @@ static int mov_write_mdhd_tag(ByteIOContext *pb, MOVTrack* track)
put_be32(pb, 0); /* Version & flags */
put_be32(pb, track->time); /* creation time */
put_be32(pb, track->time); /* modification time */
if(track->enc->codec_type == CODEC_TYPE_VIDEO) {
int64_t rate = track->enc->frame_rate;
put_be32(pb, rate);
put_be32(pb, rate*(int64_t)track->trackDuration/(int64_t)globalTimescale); // duration
}
else {
put_be32(pb, track->timescale); /* time scale (sample rate for audio) */
put_be32(pb, track->trackDuration); /* duration */
}
put_be32(pb, track->timescale); /* time scale (sample rate for audio) */
put_be32(pb, track->trackDuration); /* duration */
put_be16(pb, 0); /* language, 0 = english */
put_be16(pb, 0); /* reserved (quality) */
return 32;
......@@ -644,46 +701,28 @@ static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov)
mov->timescale = globalTimescale;
for (i=0; i<MAX_STREAMS; i++) {
if(mov->tracks[i].entry > 0) {
if(mov->tracks[i].enc->codec_type == CODEC_TYPE_VIDEO) {
mov->tracks[i].timescale = globalTimescale;
mov->tracks[i].sampleDelta = mov->tracks[i].enc->frame_rate_base;
mov->tracks[i].frameCount = mov->tracks[i].samples;
mov->tracks[i].trackDuration = (int64_t)((int64_t)mov->tracks[i].entry*
(int64_t)globalTimescale*(int64_t)mov->tracks[i].enc->frame_rate_base)/(int64_t)mov->tracks[i].enc->frame_rate;
if(mov->tracks[i].entry <= 0) continue;
if(mov->tracks[i].enc->codec_type == CODEC_TYPE_VIDEO) {
mov->tracks[i].timescale = mov->tracks[i].enc->frame_rate;
mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_rate_base;
}
else if(mov->tracks[i].enc->codec_type == CODEC_TYPE_AUDIO) {
/* If AMR, track timescale = 8000, AMR_WB = 16000 */
if(mov->tracks[i].enc->codec_id == CODEC_ID_AMR_NB) {
mov->tracks[i].sampleDuration = 160; // Bytes per chunk
mov->tracks[i].timescale = 8000;
}
else if(mov->tracks[i].enc->codec_type == CODEC_TYPE_AUDIO) {
long trackDuration = 0;
/* If AMR, track timescale = 8000, AMR_WB = 16000 */
if(mov->tracks[i].enc->codec_id == CODEC_ID_AMR_NB) {
int j;
for (j=0; j<mov->tracks[i].samples; j++) {
int cl = j / MOV_INDEX_CLUSTER_SIZE;
int id = j % MOV_INDEX_CLUSTER_SIZE;
trackDuration += mov->tracks[i].cluster[cl][id].entries;
}
mov->tracks[i].sampleDelta = 160; // Bytes per chunk
mov->tracks[i].frameCount = mov->tracks[i].samples;
mov->tracks[i].trackDuration =
mov->tracks[i].samples * mov->tracks[i].sampleDelta; //trackDuration
mov->tracks[i].timescale = 8000;
}
else {
int j;
for (j=0; j<=mov->tracks[i].entry; j++) {
int cl = j / MOV_INDEX_CLUSTER_SIZE;
int id = j % MOV_INDEX_CLUSTER_SIZE;
trackDuration += mov->tracks[i].cluster[cl][id].len;
}
mov->tracks[i].frameCount = trackDuration;
mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;
mov->tracks[i].sampleDelta = 1;
mov->tracks[i].trackDuration = trackDuration;
}
else {
mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;
mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_size;
}
mov->tracks[i].time = mov->time;
mov->tracks[i].trackID = i+1;
}
mov->tracks[i].trackDuration =
mov->tracks[i].sampleCount * mov->tracks[i].sampleDuration;
mov->tracks[i].time = mov->time;
mov->tracks[i].trackID = i+1;
}
mov_write_mvhd_tag(pb, mov);
......@@ -706,13 +745,23 @@ int mov_write_mdat_tag(ByteIOContext *pb, MOVContext* mov)
}
/* TODO: This needs to be more general */
int mov_write_ftyp_tag(ByteIOContext *pb)
int mov_write_ftyp_tag(ByteIOContext *pb, AVFormatContext *s)
{
put_be32(pb, 0x14 ); /* size */
put_tag(pb, "ftyp");
put_tag(pb, "3gp4");
if (!strcmp("3gp", s->oformat->name))
put_tag(pb, "3gp4");
else
put_tag(pb, "isom");
put_be32(pb, 0x200 );
put_tag(pb, "3gp4");
if (!strcmp("3gp", s->oformat->name))
put_tag(pb, "3gp4");
else
put_tag(pb, "mp41");
return 0x14;
}
......@@ -721,8 +770,8 @@ static int mov_write_header(AVFormatContext *s)
ByteIOContext *pb = &s->pb;
if(s->oformat != NULL) {
if(!strcmp("3gp", s->oformat->name))
mov_write_ftyp_tag(pb);
if(!strcmp("3gp", s->oformat->name) || !strcmp("mp4", s->oformat->name))
mov_write_ftyp_tag(pb,s);
}
put_flush_packet(pb);
......@@ -741,83 +790,78 @@ static int mov_write_packet(AVFormatContext *s, int stream_index,
{
MOVContext *mov = s->priv_data;
ByteIOContext *pb = &s->pb;
AVCodecContext *enc;
AVCodecContext *enc = &s->streams[stream_index]->codec;
MOVTrack* trk = &mov->tracks[stream_index];
int cl, id;
unsigned int samplesInChunk = 0;
enc = &s->streams[stream_index]->codec;
if (!url_is_streamed(&s->pb)) {
MOVTrack* trk = &mov->tracks[stream_index];
int sampleCount = 0;
unsigned int chunkSize = 0;
if (url_is_streamed(&s->pb)) return 0; /* Can't handle that */
if (!size) return 0; /* Discard 0 sized packets */
if(enc->codec_type == CODEC_TYPE_AUDIO) {
if (enc->codec_type == CODEC_TYPE_VIDEO ) {
samplesInChunk = 1;
}
else if (enc->codec_type == CODEC_TYPE_AUDIO ) {
if( enc->codec_id == CODEC_ID_AMR_NB) {
/* We must find out how many AMR blocks there are in one packet */
if(enc->codec_id == CODEC_ID_AMR_NB) {
static uint16_t packed_size[16] = {13, 14, 16, 18, 20, 21, 27, 32, 6, 0, 0, 0, 0, 0, 0, 0};
int len = 0;
while(len < size && sampleCount < 100) {
len += packed_size[(buf[len] >> 3) & 0x0F];
sampleCount++;
}
chunkSize = 1;
}
else {
sampleCount = size;
chunkSize = size/enc->channels;
}
}
else if(enc->codec_type == CODEC_TYPE_VIDEO) {
if(enc->codec_id == CODEC_ID_MPEG4 &&
trk->vosLen == 0)
{
assert(enc->extradata_size);
trk->vosLen = enc->extradata_size;
trk->vosData = av_malloc(trk->vosLen);
memcpy(trk->vosData, enc->extradata, trk->vosLen);
static uint16_t packed_size[16] =
{13, 14, 16, 18, 20, 21, 27, 32, 6, 0, 0, 0, 0, 0, 0, 0};
int len = 0;
while (len < size && samplesInChunk < 100) {
len += packed_size[(buf[len] >> 3) & 0x0F];
samplesInChunk++;
}
chunkSize = 1;
}
cl = trk->entry / MOV_INDEX_CLUSTER_SIZE;
id = trk->entry % MOV_INDEX_CLUSTER_SIZE;
if (trk->ents_allocated <= trk->entry) {
trk->cluster = av_realloc(trk->cluster, (cl+1)*sizeof(void*));
if (!trk->cluster)
return -1;
trk->cluster[cl] = av_malloc(MOV_INDEX_CLUSTER_SIZE*sizeof(MOVIentry));
if (!trk->cluster[cl])
return -1;
trk->ents_allocated += MOV_INDEX_CLUSTER_SIZE;
else if(enc->codec_id == CODEC_ID_PCM_ALAW) {
samplesInChunk = size/enc->channels;
}
if(mov->mdat_written == 0) {
mov_write_mdat_tag(pb, mov);
mov->mdat_written = 1;
mov->time = Timestamp();
else {
samplesInChunk = 1;
}
trk->cluster[cl][id].pos = url_ftell(pb) - mov->movi_list;
trk->cluster[cl][id].chunkSize = chunkSize;
if(enc->channels > 1)
trk->cluster[cl][id].len = size/enc->channels;
else
trk->cluster[cl][id].len = size;
trk->cluster[cl][id].entries = sampleCount;
if(enc->codec_type == CODEC_TYPE_VIDEO) {
trk->cluster[cl][id].key_frame = enc->coded_frame->key_frame;
if(enc->coded_frame->pict_type == FF_I_TYPE)
}
if ((enc->codec_id == CODEC_ID_MPEG4 || enc->codec_id == CODEC_ID_AAC)
&& trk->vosLen == 0) {
assert(enc->extradata_size);
trk->vosLen = enc->extradata_size;
trk->vosData = av_malloc(trk->vosLen);
memcpy(trk->vosData, enc->extradata, trk->vosLen);
}
cl = trk->entry / MOV_INDEX_CLUSTER_SIZE;
id = trk->entry % MOV_INDEX_CLUSTER_SIZE;
if (trk->ents_allocated <= trk->entry) {
trk->cluster = av_realloc(trk->cluster, (cl+1)*sizeof(void*));
if (!trk->cluster)
return -1;
trk->cluster[cl] = av_malloc(MOV_INDEX_CLUSTER_SIZE*sizeof(MOVIentry));
if (!trk->cluster[cl])
return -1;
trk->ents_allocated += MOV_INDEX_CLUSTER_SIZE;
}
if (mov->mdat_written == 0) {
mov_write_mdat_tag(pb, mov);
mov->mdat_written = 1;
mov->time = Timestamp();
}
trk->cluster[cl][id].pos = url_ftell(pb) - mov->movi_list;
trk->cluster[cl][id].samplesInChunk = samplesInChunk;
trk->cluster[cl][id].size = size;
trk->cluster[cl][id].entries = samplesInChunk;
if(enc->codec_type == CODEC_TYPE_VIDEO) {
trk->cluster[cl][id].key_frame = enc->coded_frame->key_frame;
if(enc->coded_frame->pict_type == FF_I_TYPE)
trk->hasKeyframes = 1;
}
trk->enc = enc;
trk->entry++;
if(sampleCount == 0)
trk->samples++;
else
trk->samples += sampleCount;
trk->mdat_size += size;
}
trk->enc = enc;
trk->entry++;
trk->sampleCount += samplesInChunk;
trk->mdat_size += size;
put_buffer(pb, buf, size);
put_flush_packet(pb);
......
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