RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavformat/movenc.c

950 lines
28 KiB
C
Raw Blame History

/*
* 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
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avformat.h"
#include "avi.h"
#include "avio.h"
#undef NDEBUG
#include <assert.h>
#define MOV_INDEX_CLUSTER_SIZE 16384
#define globalTimescale 1000
typedef struct MOVIentry {
unsigned int flags, pos, size;
unsigned int samplesInChunk;
char key_frame;
unsigned int entries;
} MOVIentry;
typedef struct MOVIndex {
int entry;
int mdat_size;
int ents_allocated;
long timescale;
long time;
long trackDuration;
long sampleCount;
long sampleDuration;
int hasKeyframes;
int trackID;
AVCodecContext *enc;
int vosLen;
uint8_t *vosData;
MOVIentry** cluster;
} MOVTrack;
typedef struct {
long time;
int nb_streams;
int mdat_written;
offset_t mdat_pos;
offset_t movi_list;
long timescale;
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)
{
long curpos = url_ftell(pb);
url_fseek(pb, pos, SEEK_SET);
put_be32(pb, curpos - pos); /* rewrite size */
url_fseek(pb, curpos, SEEK_SET);
return curpos - pos;
}
/* Chunk offset atom */
static int mov_write_stco_tag(ByteIOContext *pb, MOVTrack* track)
{
int i;
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "stco");
put_be32(pb, 0); /* version & flags */
put_be32(pb, track->entry); /* entry 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].pos);
}
return updateSize (pb, pos);
}
/* Sample size atom */
static int mov_write_stsz_tag(ByteIOContext *pb, MOVTrack* track)
{
int equalChunks = 1;
int i, j, entries = 0, tst = -1, oldtst = -1;
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "stsz");
put_be32(pb, 0); /* version & flags */
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].size/track->cluster[cl][id].entries;
if(oldtst != -1 && tst != oldtst) {
equalChunks = 0;
}
oldtst = tst;
entries += track->cluster[cl][id].entries;
}
if (equalChunks) {
int sSize = track->cluster[0][0].size/track->cluster[0][0].entries;
put_be32(pb, sSize); // sample size
put_be32(pb, entries); // sample count
}
else {
put_be32(pb, 0); // sample size
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;
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;
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "stsc");
put_be32(pb, 0); // version & flags
entryPos = url_ftell(pb);
put_be32(pb, track->entry); // entry count
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].samplesInChunk)
{
put_be32(pb, i+1); // first chunk
put_be32(pb, track->cluster[cl][id].samplesInChunk); // samples per chunk
put_be32(pb, 0x1); // sample description index
oldval = track->cluster[cl][id].samplesInChunk;
index++;
}
}
curpos = url_ftell(pb);
url_fseek(pb, entryPos, SEEK_SET);
put_be32(pb, index); // rewrite size
url_fseek(pb, curpos, SEEK_SET);
return updateSize (pb, pos);
}
/* Sync sample atom */
static int mov_write_stss_tag(ByteIOContext *pb, MOVTrack* track)
{
long curpos;
int i, index = 0, entryPos;
int pos = url_ftell(pb);
put_be32(pb, 0); // size
put_tag(pb, "stss");
put_be32(pb, 0); // version & flags
entryPos = url_ftell(pb);
put_be32(pb, track->entry); // entry count
for (i=0; i<track->entry; i++) {
int cl = i / MOV_INDEX_CLUSTER_SIZE;
int id = i % MOV_INDEX_CLUSTER_SIZE;
if(track->cluster[cl][id].key_frame == 1) {
put_be32(pb, i+1);
index++;
}
}
curpos = url_ftell(pb);
url_fseek(pb, entryPos, SEEK_SET);
put_be32(pb, index); // rewrite size
url_fseek(pb, curpos, SEEK_SET);
return updateSize (pb, pos);
}
static int mov_write_damr_tag(ByteIOContext *pb)
{
put_be32(pb, 0x11); /* size */
put_tag(pb, "damr");
put_tag(pb, "FFMP");
put_byte(pb, 0);
put_be16(pb, 0x80); /* Mode set (all modes for AMR_NB) */
put_be16(pb, 0xa); /* Mode change period (no restriction) */
//put_be16(pb, 0x81ff); /* Mode set (all modes for AMR_NB) */
//put_be16(pb, 1); /* Mode change period (no restriction) */
return 0x11;
}
static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
if(track->enc->codec_id == CODEC_ID_PCM_MULAW)
put_tag(pb, "ulaw");
else if(track->enc->codec_id == CODEC_ID_PCM_ALAW)
put_tag(pb, "alaw");
else if(track->enc->codec_id == CODEC_ID_ADPCM_IMA_QT)
put_tag(pb, "ima4");
else if(track->enc->codec_id == CODEC_ID_MACE3)
put_tag(pb, "MAC3");
else if(track->enc->codec_id == CODEC_ID_MACE6)
put_tag(pb, "MAC6");
else if(track->enc->codec_id == CODEC_ID_AAC)
put_tag(pb, "mp4a");
else if(track->enc->codec_id == CODEC_ID_AMR_NB)
put_tag(pb, "samr");
else
put_tag(pb, " ");
put_be32(pb, 0); /* Reserved */
put_be16(pb, 0); /* Reserved */
put_be16(pb, 1); /* Data-reference index, XXX == 1 */
/* 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 */
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);
}
static int mov_write_d263_tag(ByteIOContext *pb)
{
put_be32(pb, 0xf); /* size */
put_tag(pb, "d263");
put_tag(pb, "FFMP");
put_be16(pb, 0x0a);
put_byte(pb, 0);
return 0xf;
}
/* TODO: No idea about these values */
static int mov_write_svq3_tag(ByteIOContext *pb)
{
put_be32(pb, 0x15);
put_tag(pb, "SMI ");
put_tag(pb, "SEQH");
put_be32(pb, 0x5);
put_be32(pb, 0xe2c0211d);
put_be32(pb, 0xc0000000);
put_byte(pb, 0);
return 0x15;
}
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)
{
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
{
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
// ES descriptor
putDescr(pb, 0x03, 3 + descrLength(13 + decoderSpecificInfoLen) +
descrLength(1));
put_be16(pb, 0x0001); // ID (= 1)
put_byte(pb, 0x00); // flags (= no flags)
// 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
// TODO: find real values for these
put_be32(pb, 0x0002e918); // maxbitrate
put_be32(pb, 0x00017e6b); // avg bitrate
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 updateSize (pb, pos);
}
static int mov_write_video_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
if(track->enc->codec_id == CODEC_ID_SVQ1)
put_tag(pb, "SVQ1");
else if(track->enc->codec_id == CODEC_ID_SVQ3)
put_tag(pb, "SVQ3");
else if(track->enc->codec_id == CODEC_ID_MPEG4)
put_tag(pb, "mp4v");
else if(track->enc->codec_id == CODEC_ID_H263)
put_tag(pb, "s263");
else
put_tag(pb, " "); /* Unknown tag */
put_be32(pb, 0); /* Reserved */
put_be16(pb, 0); /* Reserved */
put_be16(pb, 1); /* Data-reference index */
put_be32(pb, 0); /* Reserved (= 02000c) */
put_be32(pb, 0); /* Reserved ("SVis")*/
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved (400)*/
put_be16(pb, track->enc->width); /* Video width */
put_be16(pb, track->enc->height); /* Video height */
put_be32(pb, 0x00480000); /* Reserved */
put_be32(pb, 0x00480000); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be16(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be32(pb, 0); /* Reserved */
put_be16(pb, 0x18); /* Reserved */
put_be16(pb, 0xffff); /* Reserved */
if(track->enc->codec_id == CODEC_ID_MPEG4)
mov_write_esds_tag(pb, track);
else if(track->enc->codec_id == CODEC_ID_H263)
mov_write_d263_tag(pb);
else if(track->enc->codec_id == CODEC_ID_SVQ3)
mov_write_svq3_tag(pb);
return updateSize (pb, pos);
}
static int mov_write_stsd_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "stsd");
put_be32(pb, 0); /* version & flags */
put_be32(pb, 1); /* entry count */
if (track->enc->codec_type == CODEC_TYPE_VIDEO)
mov_write_video_tag(pb, track);
else if (track->enc->codec_type == CODEC_TYPE_AUDIO)
mov_write_audio_tag(pb, track);
return updateSize(pb, pos);
}
/* 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 */
put_tag(pb, "stts");
put_be32(pb, 0); /* version & flags */
put_be32(pb, 1); /* entry count */
put_be32(pb, track->sampleCount); /* sample count */
put_be32(pb, track->sampleDuration); /* sample duration */
return 0x18;
}
static int mov_write_dref_tag(ByteIOContext *pb)
{
put_be32(pb, 28); /* size */
put_tag(pb, "dref");
put_be32(pb, 0); /* version & flags */
put_be32(pb, 1); /* entry count */
put_be32(pb, 0xc); /* size */
put_tag(pb, "url ");
put_be32(pb, 1); /* version & flags */
return 28;
}
static int mov_write_stbl_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "stbl");
mov_write_stsd_tag(pb, track);
mov_write_stts_tag(pb, track);
if (track->enc->codec_type == CODEC_TYPE_VIDEO &&
track->hasKeyframes)
mov_write_stss_tag(pb, track);
mov_write_stsc_tag(pb, track);
mov_write_stsz_tag(pb, track);
mov_write_stco_tag(pb, track);
return updateSize(pb, pos);
}
static int mov_write_dinf_tag(ByteIOContext *pb)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "dinf");
mov_write_dref_tag(pb);
return updateSize(pb, pos);
}
static int mov_write_smhd_tag(ByteIOContext *pb)
{
put_be32(pb, 16); /* size */
put_tag(pb, "smhd");
put_be32(pb, 0); /* version & flags */
put_be16(pb, 0); /* reserved (balance, normally = 0) */
put_be16(pb, 0); /* reserved */
return 16;
}
static int mov_write_vmhd_tag(ByteIOContext *pb)
{
put_be32(pb, 0x14); /* size (always 0x14) */
put_tag(pb, "vmhd");
put_be32(pb, 0x01); /* version & flags */
put_be64(pb, 0); /* reserved (graphics mode = copy) */
return 0x14;
}
static int mov_write_minf_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "minf");
if(track->enc->codec_type == CODEC_TYPE_VIDEO)
mov_write_vmhd_tag(pb);
else
mov_write_smhd_tag(pb);
mov_write_dinf_tag(pb);
mov_write_stbl_tag(pb, track);
return updateSize(pb, pos);
}
static int mov_write_hdlr_tag(ByteIOContext *pb, MOVTrack* track)
{
char *str;
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "hdlr");
put_be32(pb, 0); /* Version & flags */
put_be32(pb, 0); /* reserved */
if(track->enc->codec_type == CODEC_TYPE_VIDEO)
put_tag(pb, "vide"); /* handler type */
else
put_tag(pb, "soun"); /* handler type */
put_be32(pb ,0); /* reserved */
put_be32(pb ,0); /* reserved */
put_be32(pb ,0); /* reserved */
if(track->enc->codec_type == CODEC_TYPE_VIDEO)
str = "VideoHandler";
else
str = "SoundHandler";
put_byte(pb, strlen(str)); /* string counter */
put_buffer(pb, str, strlen(str));
return updateSize(pb, pos);
}
static int mov_write_mdhd_tag(ByteIOContext *pb, MOVTrack* track)
{
put_be32(pb, 32); /* size */
put_tag(pb, "mdhd");
put_be32(pb, 0); /* Version & flags */
put_be32(pb, track->time); /* creation time */
put_be32(pb, track->time); /* modification time */
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;
}
static int mov_write_mdia_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "mdia");
mov_write_mdhd_tag(pb, track);
mov_write_hdlr_tag(pb, track);
mov_write_minf_tag(pb, track);
return updateSize(pb, pos);
}
static int mov_write_tkhd_tag(ByteIOContext *pb, MOVTrack* track)
{
int64_t maxTrackLenTemp;
put_be32(pb, 0x5c); /* size (always 0x5c) */
put_tag(pb, "tkhd");
put_be32(pb, 0xf); /* version & flags (track enabled) */
put_be32(pb, track->time); /* creation time */
put_be32(pb, track->time); /* modification time */
put_be32(pb, track->trackID); /* track-id */
put_be32(pb, 0); /* reserved */
maxTrackLenTemp = ((int64_t)globalTimescale*(int64_t)track->trackDuration)/(int64_t)track->timescale;
put_be32(pb, (long)maxTrackLenTemp); /* duration */
put_be32(pb, 0); /* reserved */
put_be32(pb, 0); /* reserved */
put_be32(pb, 0x0); /* reserved (Layer & Alternate group) */
/* Volume, only for audio */
if(track->enc->codec_type == CODEC_TYPE_AUDIO)
put_be16(pb, 0x0100);
else
put_be16(pb, 0);
put_be16(pb, 0); /* reserved */
/* Matrix structure */
put_be32(pb, 0x00010000); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x00010000); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x40000000); /* reserved */
/* Track width and height, for visual only */
if(track->enc->codec_type == CODEC_TYPE_VIDEO) {
put_be32(pb, track->enc->width*0x10000);
put_be32(pb, track->enc->height*0x10000);
}
else {
put_be32(pb, 0);
put_be32(pb, 0);
}
return 0x5c;
}
static int mov_write_trak_tag(ByteIOContext *pb, MOVTrack* track)
{
int pos = url_ftell(pb);
put_be32(pb, 0); /* size */
put_tag(pb, "trak");
mov_write_tkhd_tag(pb, track);
mov_write_mdia_tag(pb, track);
return updateSize(pb, pos);
}
/* TODO: Not sorted out, but not necessary either */
static int mov_write_iods_tag(ByteIOContext *pb, MOVContext *mov)
{
put_be32(pb, 0x15); /* size */
put_tag(pb, "iods");
put_be32(pb, 0); /* version & flags */
put_be16(pb, 0x1007);
put_byte(pb, 0);
put_be16(pb, 0x4fff);
put_be16(pb, 0xfffe);
put_be16(pb, 0x01ff);
return 0x15;
}
static int mov_write_mvhd_tag(ByteIOContext *pb, MOVContext *mov)
{
int maxTrackID = 1, maxTrackLen = 0, i;
int64_t maxTrackLenTemp;
put_be32(pb, 0x6c); /* size (always 0x6c) */
put_tag(pb, "mvhd");
put_be32(pb, 0); /* version & flags */
put_be32(pb, mov->time); /* creation time */
put_be32(pb, mov->time); /* modification time */
put_be32(pb, mov->timescale); /* timescale */
for (i=0; i<MAX_STREAMS; i++) {
if(mov->tracks[i].entry > 0) {
maxTrackLenTemp = ((int64_t)globalTimescale*(int64_t)mov->tracks[i].trackDuration)/(int64_t)mov->tracks[i].timescale;
if(maxTrackLen < maxTrackLenTemp)
maxTrackLen = maxTrackLenTemp;
if(maxTrackID < mov->tracks[i].trackID)
maxTrackID = mov->tracks[i].trackID;
}
}
put_be32(pb, maxTrackLen); /* duration of longest track */
put_be32(pb, 0x00010000); /* reserved (preferred rate) 1.0 = normal */
put_be16(pb, 0x0100); /* reserved (preferred volume) 1.0 = normal */
put_be16(pb, 0); /* reserved */
put_be32(pb, 0); /* reserved */
put_be32(pb, 0); /* reserved */
/* Matrix structure */
put_be32(pb, 0x00010000); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x00010000); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x0); /* reserved */
put_be32(pb, 0x40000000); /* reserved */
put_be32(pb, 0); /* reserved (preview time) */
put_be32(pb, 0); /* reserved (preview duration) */
put_be32(pb, 0); /* reserved (poster time) */
put_be32(pb, 0); /* reserved (selection time) */
put_be32(pb, 0); /* reserved (selection duration) */
put_be32(pb, 0); /* reserved (current time) */
put_be32(pb, maxTrackID+1); /* Next track id */
return 0x6c;
}
static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov)
{
int pos, i;
pos = url_ftell(pb);
put_be32(pb, 0); /* size placeholder*/
put_tag(pb, "moov");
mov->timescale = globalTimescale;
for (i=0; i<MAX_STREAMS; i++) {
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 {
mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;
mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_size;
}
}
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);
//mov_write_iods_tag(pb, mov);
for (i=0; i<MAX_STREAMS; i++) {
if(mov->tracks[i].entry > 0) {
mov_write_trak_tag(pb, &(mov->tracks[i]));
}
}
return updateSize(pb, pos);
}
int mov_write_mdat_tag(ByteIOContext *pb, MOVContext* mov)
{
mov->mdat_pos = url_ftell(pb);
put_be32(pb, 0); /* size placeholder*/
put_tag(pb, "mdat");
return 0;
}
/* TODO: This needs to be more general */
int mov_write_ftyp_tag(ByteIOContext *pb, AVFormatContext *s)
{
put_be32(pb, 0x14 ); /* size */
put_tag(pb, "ftyp");
if (!strcmp("3gp", s->oformat->name))
put_tag(pb, "3gp4");
else
put_tag(pb, "isom");
put_be32(pb, 0x200 );
if (!strcmp("3gp", s->oformat->name))
put_tag(pb, "3gp4");
else
put_tag(pb, "mp41");
return 0x14;
}
static int mov_write_header(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
if(s->oformat != NULL) {
if(!strcmp("3gp", s->oformat->name) || !strcmp("mp4", s->oformat->name))
mov_write_ftyp_tag(pb,s);
}
put_flush_packet(pb);
return 0;
}
static int Timestamp() {
return 1067949799U+(24107*86400); //its the modification time of this line :)
}
static int mov_write_packet(AVFormatContext *s, int stream_index,
const uint8_t *buf, int size, int64_t pts)
{
MOVContext *mov = s->priv_data;
ByteIOContext *pb = &s->pb;
AVCodecContext *enc = &s->streams[stream_index]->codec;
MOVTrack* trk = &mov->tracks[stream_index];
int cl, id;
unsigned int samplesInChunk = 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_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 */
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++;
}
}
else if(enc->codec_id == CODEC_ID_PCM_ALAW) {
samplesInChunk = size/enc->channels;
}
else {
samplesInChunk = 1;
}
}
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++;
trk->sampleCount += samplesInChunk;
trk->mdat_size += size;
put_buffer(pb, buf, size);
put_flush_packet(pb);
return 0;
}
static int mov_write_trailer(AVFormatContext *s)
{
MOVContext *mov = s->priv_data;
ByteIOContext *pb = &s->pb;
int res = 0;
int i, j;
offset_t file_size;
file_size = url_ftell(pb);
j = 0;
/* Write size of mdat tag */
for (i=0; i<MAX_STREAMS; i++) {
if(mov->tracks[i].ents_allocated > 0) {
j += mov->tracks[i].mdat_size;
}
}
url_fseek(pb, mov->mdat_pos, SEEK_SET);
put_be32(pb, j+8);
url_fseek(pb, file_size, SEEK_SET);
mov_write_moov_tag(pb, mov);
for (i=0; i<MAX_STREAMS; i++) {
for (j=0; j<mov->tracks[i].ents_allocated/MOV_INDEX_CLUSTER_SIZE; j++) {
av_free(mov->tracks[i].cluster[j]);
}
av_free(mov->tracks[i].cluster);
mov->tracks[i].cluster = NULL;
mov->tracks[i].ents_allocated = mov->tracks[i].entry = 0;
}
put_flush_packet(pb);
return res;
}
static AVOutputFormat mov_oformat = {
"mov",
"mov format",
NULL,
"mov",
sizeof(MOVContext),
CODEC_ID_PCM_ALAW,
CODEC_ID_MPEG4,
mov_write_header,
mov_write_packet,
mov_write_trailer,
};
static AVOutputFormat _3gp_oformat = {
"3gp",
"3gp format",
NULL,
"3gp",
sizeof(MOVContext),
CODEC_ID_AMR_NB,
CODEC_ID_H263,
mov_write_header,
mov_write_packet,
mov_write_trailer,
};
static AVOutputFormat mp4_oformat = {
"mp4",
"mp4 format",
"application/mp4",
"mp4,m4a",
sizeof(MOVContext),
CODEC_ID_AAC,
CODEC_ID_MPEG4,
mov_write_header,
mov_write_packet,
mov_write_trailer,
};
int movenc_init(void)
{
av_register_output_format(&mov_oformat);
av_register_output_format(&_3gp_oformat);
av_register_output_format(&mp4_oformat);
return 0;
}
Reference in New Issue View Git Blame Copy Permalink