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FFmpeg/libavformat/movenc.c
Dan Christiansen 4cb3f3b637 Using the extension m4a for audio only MPEG-4 files is increasingly 
common, especially since Apple iTunes treats files with the two
extensions differently. Without the patch, FFmpeg won't know that m4a
is for MPEG-4 files
patch by (Dan Christiansen <danchr at daimi dot au dot dk>)

Originally committed as revision 2398 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-10-19 20:57:47 +00:00

909 lines
28 KiB
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/*
* MOV, 3GP, MP4 encoder.
* Copyright (c) 2003 Thomas Raivio.
*
* 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"
#include <time.h>
#undef NDEBUG
#include <assert.h>
#define MOV_INDEX_CLUSTER_SIZE 16384
#define globalTimescale 1000
typedef struct MOVIentry {
unsigned int flags, pos, len;
unsigned int chunkSize;
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;
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;
//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;
}
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);
}
static int mov_write_stsz_tag(ByteIOContext *pb, MOVTrack* track)
{
int equalChunks = 1;
int i, 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].len;
if(oldtst != -1 && tst != oldtst) {
equalChunks = 0;
break;
}
oldtst = tst;
}
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;
put_be32(pb, sSize); // sample size
put_be32(pb, track->samples/track->enc->channels); // sample count
}
else {
put_be32(pb, 0); // sample size
put_be32(pb, track->entry); // 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);
}
}
return updateSize (pb, pos);
}
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].chunkSize)
{
put_be32(pb, i+1); // first chunk
put_be32(pb, track->cluster[cl][id].chunkSize);
put_be32(pb, 0x1); // sample description index
oldval = track->cluster[cl][id].chunkSize;
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_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 */
put_be32(pb, 0); /* Reserved */
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_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 esdsLength(unsigned int len)
{
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;
}
static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic
{
put_be32(pb, track->vosLen+18+14+17);
put_tag(pb, "esds");
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)
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)
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
// 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
put_byte(pb, 0x02);
return track->vosLen+18+14+17;
}
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 */
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->frameCount); /* sample count */
put_be32(pb, track->sampleDelta); /* sample delta */
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 */
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_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) {
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;
}
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;
}
}
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)
{
put_be32(pb, 0x14 ); /* size */
put_tag(pb, "ftyp");
put_tag(pb, "3gp4");
put_be32(pb, 0x200 );
put_tag(pb, "3gp4");
return 0x14;
}
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);
}
put_flush_packet(pb);
return 0;
}
static int Timestamp() {
time_t ltime;
time ( &ltime );
return ltime+(24107*86400);
}
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;
int cl, id;
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(enc->codec_type == CODEC_TYPE_AUDIO) {
/* 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);
}
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;
}
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].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)
trk->hasKeyframes = 1;
}
trk->enc = enc;
trk->entry++;
if(sampleCount == 0)
trk->samples++;
else
trk->samples += sampleCount;
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;
}
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