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ffmpeg/libav/mov.c
Fabrice Bellard 19720f15fd license/copyright change 
Originally committed as revision 593 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-05-25 22:34:32 +00:00

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/*
* MOV decoder.
* Copyright (c) 2001 Fabrice Bellard.
*
* 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"
/*
* First version by Francois Revol revol@free.fr
*
* Features and limitations:
* - reads most of the QT files I have (at least the structure),
* the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.
* - ffmpeg has nearly none of the usual QuickTime codecs,
* although I succesfully dumped raw and mp3 audio tracks off .mov files.
* Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
* - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes
* (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at
* http://mpeg.telecomitalialab.com/faq.htm
* - the code is quite ugly... maybe I won't do it recursive next time :-)
*
* Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
* when coding this :) (it's a writer anyway)
*
* Reference documents:
* http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
* Apple:
* http://developer.apple.com/techpubs/quicktime/qtdevdocs/QTFF/qtff.html
* http://developer.apple.com/techpubs/quicktime/qtdevdocs/PDF/QTFileFormat.pdf
* QuickTime is a trademark of Apple (AFAIK :))
*/
//#define DEBUG
#ifdef DEBUG
/*
* XXX: static sux, even more in a multithreaded environment...
* Avoid them. This is here just to help debugging.
*/
static int debug_indent = 0;
void print_atom(const char *str, UINT32 type, UINT64 offset, UINT64 size)
{
unsigned int tag, i;
tag = (unsigned int) type;
i=debug_indent;
if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
while(i--)
printf("|");
printf("parse:");
printf(" %s: tag=%c%c%c%c offset=%d size=0x%x\n",
str, tag & 0xff,
(tag >> 8) & 0xff,
(tag >> 16) & 0xff,
(tag >> 24) & 0xff,
(unsigned int)offset,
(unsigned int)size);
}
#endif
/* some streams in QT (and in MP4 mostly) aren't either video nor audio */
/* so we first list them as this, then clean up the list of streams we give back, */
/* getting rid of these */
#define CODEC_TYPE_MOV_OTHER 2
static const CodecTag mov_video_tags[] = {
/* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */
/* { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG */
{ CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
{ CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
/* Graphics */
/* Animation */
/* Apple video */
/* Kodak Photo CD */
/* { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG ? */
{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format A) */
{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
/* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */
/* Sorenson video */
{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, /* OpenDiVX *//* yeah ! */
{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
/* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
{ 0, 0 },
};
static const CodecTag mov_audio_tags[] = {
/* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */
{ CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
{ CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') }, /* 8 bits */
{ CODEC_ID_PCM_U8, 0x20776172 }, /* 8 bits unsigned */
{ CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
{ CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
{ CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
/* { CODEC_ID_, MKTAG('i', 'm', 'a', '4') }, *//* IMA-4 */
{ CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
{ CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
{ CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
/* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
/* MP4 tags */
/* { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, *//* MPEG 4 AAC or audio ? */
/* The standard for mpeg4 audio is still not normalised AFAIK anyway */
{ 0, 0 },
};
/* the QuickTime file format is quite convoluted...
* it has lots of index tables, each indexing something in another one...
* Here we just use what is needed to read the chunks
*/
typedef struct MOV_sample_to_chunk_tbl {
long first;
long count;
long id;
} MOV_sample_to_chunk_tbl;
typedef struct MOVStreamContext {
int ffindex; /* the ffmpeg stream id */
int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
long next_chunk;
long chunk_count;
INT64 *chunk_offsets;
long sample_to_chunk_sz;
MOV_sample_to_chunk_tbl *sample_to_chunk;
long sample_size;
long sample_count;
long *sample_sizes;
} MOVStreamContext;
typedef struct MOVContext {
int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */
AVFormatContext *fc;
long time_scale;
int found_moov; /* when both 'moov' and 'mdat' sections has been found */
int found_mdat; /* we suppose we have enough data to read the file */
INT64 mdat_size;
INT64 mdat_offset;
int total_streams;
/* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
* but we need the info to be able to skip data from those streams in the 'mdat' section
*/
MOVStreamContext *streams[MAX_STREAMS];
INT64 next_chunk_offset;
} MOVContext;
struct MOVParseTableEntry;
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
/* those functions parse an atom */
/* return code:
1: found what I wanted, exit
0: continue to parse next atom
-1: error occured, exit
*/
typedef int (*mov_parse_function)(const struct MOVParseTableEntry *parse_table,
ByteIOContext *pb,
UINT32 atom_type,
INT64 atom_offset, /* after the size and type field (and eventually the extended size) */
INT64 atom_size, /* total size (excluding the size and type fields) */
void *param);
/* links atom IDs to parse functions */
typedef struct MOVParseTableEntry {
UINT32 type;
mov_parse_function func;
} MOVParseTableEntry;
static int parse_leaf(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
#ifdef DEBUG
print_atom("leaf", atom_type, atom_offset, atom_size);
#endif
if(atom_size>1)
url_fskip(pb, atom_size);
/* url_seek(pb, atom_offset+atom_size, SEEK_SET); */
return 0;
}
static int parse_default(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
UINT32 type, foo=0;
UINT64 offset, size;
UINT64 total_size = 0;
int i;
int err = 0;
foo=0;
#ifdef DEBUG
print_atom("default", atom_type, atom_offset, atom_size);
debug_indent++;
#endif
offset = atom_offset;
if(atom_size < 0)
atom_size = 0x0FFFFFFFFFFFFFFF;
while((total_size < atom_size) && !url_feof(pb) && !err) {
size=atom_size;
type=0L;
if(atom_size >= 8) {
size = get_be32(pb);
type = get_le32(pb);
}
total_size += 8;
offset+=8;
// printf("type: %08lx sz: %08lx", type, size);
if(size == 1) { /* 64 bit extended size */
size = get_be64(pb);
offset+=8;
total_size+=8;
size-=8;
}
if(size == 0)
size = atom_size - total_size;
size-=8;
for(i=0; parse_table[i].type != 0L && parse_table[i].type != type; i++);
// printf(" i=%ld\n", i);
if (parse_table[i].type == 0) { /* skip leaf atoms data */
// url_seek(pb, atom_offset+atom_size, SEEK_SET);
#ifdef DEBUG
print_atom("unknown", type, offset, size);
#endif
url_fskip(pb, size);
} else
err = (parse_table[i].func)(parse_table, pb, type, offset, size, param);
offset+=size;
total_size+=size;
}
#ifdef DEBUG
debug_indent--;
#endif
return err;
}
static int parse_mvhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
#ifdef DEBUG
print_atom("mvhd", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
get_be32(pb); /* creation time */
get_be32(pb); /* modification time */
c->time_scale = get_be32(pb); /* time scale */
get_be32(pb); /* duration */
get_be32(pb); /* preferred scale */
get_be16(pb); /* preferred volume */
url_fskip(pb, 10); /* reserved */
url_fskip(pb, 36); /* display matrix */
get_be32(pb); /* preview time */
get_be32(pb); /* preview duration */
get_be32(pb); /* poster time */
get_be32(pb); /* selection time */
get_be32(pb); /* selection duration */
get_be32(pb); /* current time */
get_be32(pb); /* next track ID */
return 0;
}
/* this atom should contain all header atoms */
static int parse_moov(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
int err;
MOVContext *c;
#ifdef DEBUG
print_atom("moov", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
err = parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);
/* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
/* so we don't parse the whole file if over a network */
c->found_moov=1;
if(c->found_mdat)
return 1; /* found both, just go */
return 0; /* now go for mdat */
}
/* this atom contains actual media data */
static int parse_mdat(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
#ifdef DEBUG
print_atom("mdat", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
if(atom_size == 0) /* wrong one (MP4) */
return 0;
c->found_mdat=1;
c->mdat_offset = atom_offset;
c->mdat_size = atom_size;
if(c->found_moov)
return 1; /* found both, just go */
url_fskip(pb, atom_size);
return 0; /* now go for moov */
}
static int parse_trak(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("trak", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = av_malloc(sizeof(AVStream));
if (!st) return -2;
memset(st, 0, sizeof(AVStream));
c->fc->streams[c->fc->nb_streams] = st;
sc = av_malloc(sizeof(MOVStreamContext));
st->priv_data = sc;
st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
c->streams[c->fc->nb_streams++] = sc;
return parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);
}
static int parse_tkhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
AVStream *st;
#ifdef DEBUG
print_atom("tkhd", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
get_byte(pb); /* version */
get_byte(pb); get_byte(pb);
get_byte(pb); /* flags */
/*
MOV_TRACK_ENABLED 0x0001
MOV_TRACK_IN_MOVIE 0x0002
MOV_TRACK_IN_PREVIEW 0x0004
MOV_TRACK_IN_POSTER 0x0008
*/
get_be32(pb); /* creation time */
get_be32(pb); /* modification time */
st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
get_be32(pb); /* reserved */
get_be32(pb); /* duration */
get_be32(pb); /* reserved */
get_be32(pb); /* reserved */
get_be16(pb); /* layer */
get_be16(pb); /* alternate group */
get_be16(pb); /* volume */
get_be16(pb); /* reserved */
url_fskip(pb, 36); /* display matrix */
/* those are fixed-point */
st->codec.width = get_be32(pb) >> 16; /* track width */
st->codec.height = get_be32(pb) >> 16; /* track height */
return 0;
}
static int parse_hdlr(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int len;
char *buf;
UINT32 type;
AVStream *st;
UINT32 ctype;
#ifdef DEBUG
print_atom("hdlr", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
/* component type */
ctype = get_le32(pb);
type = get_le32(pb); /* component subtype */
#ifdef DEBUG
printf("ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype);
printf("stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
#endif
#ifdef DEBUG
/* XXX: yeah this is ugly... */
if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
if(type == MKTAG('v', 'i', 'd', 'e'))
puts("hdlr: vide");
else if(type == MKTAG('s', 'o', 'u', 'n'))
puts("hdlr: soun");
} else if(ctype == 0) { /* MP4 */
if(type == MKTAG('v', 'i', 'd', 'e'))
puts("hdlr: vide");
else if(type == MKTAG('s', 'o', 'u', 'n'))
puts("hdlr: soun");
else if(type == MKTAG('o', 'd', 's', 'm'))
puts("hdlr: odsm");
else if(type == MKTAG('s', 'd', 's', 'm'))
puts("hdlr: sdsm");
} else puts("hdlr: meta");
#endif
if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
if(type == MKTAG('v', 'i', 'd', 'e'))
st->codec.codec_type = CODEC_TYPE_VIDEO;
else if(type == MKTAG('s', 'o', 'u', 'n'))
st->codec.codec_type = CODEC_TYPE_AUDIO;
} else if(ctype == 0) { /* MP4 */
if(type == MKTAG('v', 'i', 'd', 'e'))
st->codec.codec_type = CODEC_TYPE_VIDEO;
else if(type == MKTAG('s', 'o', 'u', 'n'))
st->codec.codec_type = CODEC_TYPE_AUDIO;
}
get_be32(pb); /* component manufacture */
get_be32(pb); /* component flags */
get_be32(pb); /* component flags mask */
if(atom_size <= 24)
return 0; /* nothing left to read */
/* XXX: MP4 uses a C string, not a pascal one */
/* component name */
len = get_byte(pb);
/* XXX: use a better heuristic */
if(len < 32) {
/* assume that it is a Pascal like string */
buf = av_malloc(len+1);
get_buffer(pb, buf, len);
buf[len] = '\0';
#ifdef DEBUG
printf("**buf='%s'\n", buf);
#endif
av_free(buf);
} else {
/* MP4 string */
for(;;) {
if (len == 0)
break;
len = get_byte(pb);
}
}
return 0;
}
static int parse_stsd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, size, samp_sz, frames_per_sample;
UINT32 format;
AVStream *st;
#ifdef DEBUG
print_atom("stsd", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
while(entries--) {
size = get_be32(pb); /* size */
format = get_le32(pb); /* data format */
get_be32(pb); /* reserved */
get_be16(pb); /* reserved */
get_be16(pb); /* index */
/* if(format == MKTAG('m', 'p', '4', 'v')) */
/* st->codec.codec_type=CODEC_TYPE_VIDEO; *//* force things (XXX: was this for .mp4 ?) */
if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
st->codec.codec_tag = format;
st->codec.codec_id = codec_get_id(mov_video_tags, format);
get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
get_be32(pb); /* temporal quality */
get_be32(pb); /* spacial quality */
st->codec.width = get_be16(pb); /* width */
st->codec.height = get_be16(pb); /* height */
get_be32(pb); /* horiz resolution */
get_be32(pb); /* vert resolution */
get_be32(pb); /* data size, always 0 */
frames_per_sample = get_be16(pb); /* frame per samples */
#ifdef DEBUG
printf("frames/samples = %d\n", frames_per_sample);
#endif
url_fskip(pb, 32); /* codec name */
get_be16(pb); /* depth */
get_be16(pb); /* colortable id */
get_be16(pb); /* */
get_be16(pb); /* */
st->codec.sample_rate = 25 * FRAME_RATE_BASE;
if(size > 16)
url_fskip(pb, size-(16+24+18+32));
} else {
st->codec.codec_tag = format;
get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
st->codec.channels = get_be16(pb);/* channel count */
samp_sz = get_be16(pb); /* sample size */
#ifdef DEBUG
if(samp_sz != 16)
puts("!!! stsd: audio sample size is not 16 bit !");
#endif
st->codec.codec_id = codec_get_id(mov_audio_tags, format);
/* handle specific s8 codec */
if (st->codec.codec_id == CODEC_ID_PCM_S16BE && samp_sz == 8)
st->codec.codec_id = CODEC_ID_PCM_S8;
get_be16(pb); /* compression id = 0*/
get_be16(pb); /* packet size = 0 */
st->codec.sample_rate = ((get_be32(pb) >> 16));
st->codec.bit_rate = 0;
/* this is for .mp4 files */
if(format == MKTAG('m', 'p', '4', 'v')) { /* XXX */
st->codec.codec_type=CODEC_TYPE_VIDEO; /* force things */
st->codec.codec_id = CODEC_ID_MPEG4;
st->codec.frame_rate = 25;
st->codec.bit_rate = 100000;
}
#if 0
get_be16(pb); get_be16(pb); /* */
get_be16(pb); /* */
get_be16(pb); /* */
get_be16(pb); /* */
get_be16(pb); /* */
#endif
if(size > 16)
url_fskip(pb, size-(16+20));
}
#ifdef DEBUG
printf("4CC= %c%c%c%c\n", *((char *)&format), ((char *)&format)[1], ((char *)&format)[2], ((char *)&format)[3]);
#endif
}
/*
if(len) {
buf = av_malloc(len+1);
get_buffer(pb, buf, len);
buf[len] = '\0';
puts(buf);
av_free(buf);
}
*/
return 0;
}
static int parse_stco(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, i;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("stco", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
sc = (MOVStreamContext *)st->priv_data;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
sc->chunk_count = entries;
sc->chunk_offsets = av_malloc(entries * sizeof(INT64));
if(atom_type == MKTAG('s', 't', 'c', 'o')) {
for(i=0; i<entries; i++) {
sc->chunk_offsets[i] = get_be32(pb);
/*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/
}
} else if(atom_type == MKTAG('c', 'o', '6', '4')) {
for(i=0; i<entries; i++) {
sc->chunk_offsets[i] = get_be64(pb);
/*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/
}
} else
return -1;
return 0;
}
static int parse_stsc(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, i;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("stsc", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
sc = (MOVStreamContext *)st->priv_data;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
sc->sample_to_chunk_sz = entries;
sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
for(i=0; i<entries; i++) {
sc->sample_to_chunk[i].first = get_be32(pb);
sc->sample_to_chunk[i].count = get_be32(pb);
sc->sample_to_chunk[i].id = get_be32(pb);
#ifdef DEBUG
/* printf("sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); */
#endif
}
return 0;
}
static int parse_stsz(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, i;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("stsz", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
sc = (MOVStreamContext *)st->priv_data;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
sc->sample_size = get_be32(pb);
entries = get_be32(pb);
sc->sample_count = entries;
printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
if(sc->sample_size)
return 0; /* there isn't any table following */
sc->sample_sizes = av_malloc(entries * sizeof(long));
for(i=0; i<entries; i++) {
sc->sample_sizes[i] = get_be32(pb);
#ifdef DEBUG
/* printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */
#endif
}
return 0;
}
static const MOVParseTableEntry mov_default_parse_table[] = {
/* mp4 atoms */
{ MKTAG( 'm', 'p', '4', 'a' ), parse_default },
{ MKTAG( 'c', 'o', '6', '4' ), parse_stco },
{ MKTAG( 's', 't', 'c', 'o' ), parse_stco },
{ MKTAG( 'c', 'r', 'h', 'd' ), parse_default },
{ MKTAG( 'c', 't', 't', 's' ), parse_leaf },
{ MKTAG( 'c', 'p', 'r', 't' ), parse_default },
{ MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },
{ MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },
{ MKTAG( 'd', 'i', 'n', 'f' ), parse_default },
{ MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },
{ MKTAG( 's', 't', 'd', 'p' ), parse_default },
{ MKTAG( 'e', 's', 'd', 's' ), parse_default },
{ MKTAG( 'e', 'd', 't', 's' ), parse_default },
{ MKTAG( 'e', 'l', 's', 't' ), parse_leaf },
{ MKTAG( 'u', 'u', 'i', 'd' ), parse_default },
{ MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },
{ MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },
{ MKTAG( 'h', 'm', 'h', 'd' ), parse_default },
{ MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },
{ MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },
{ MKTAG( 'm', 'p', '4', 's' ), parse_default },
{ MKTAG( 'm', 'd', 'i', 'a' ), parse_default },
{ MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },
{ MKTAG( 'm', 'd', 'h', 'd' ), parse_leaf },
{ MKTAG( 'm', 'i', 'n', 'f' ), parse_default },
{ MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },
{ MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },
{ MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },
{ MKTAG( 'o', 'd', 'h', 'd' ), parse_default },
{ MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },
{ MKTAG( 's', 't', 's', 'd' ), parse_stsd },
{ MKTAG( 's', 't', 's', 'z' ), parse_stsz },
{ MKTAG( 's', 't', 'b', 'l' ), parse_default },
{ MKTAG( 's', 't', 's', 'c' ), parse_stsc },
{ MKTAG( 's', 'd', 'h', 'd' ), parse_default },
{ MKTAG( 's', 't', 's', 'h' ), parse_default },
{ MKTAG( 's', 'k', 'i', 'p' ), parse_default },
{ MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },
{ MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },
{ MKTAG( 's', 't', 's', 's' ), parse_leaf },
{ MKTAG( 's', 't', 't', 's' ), parse_leaf },
{ MKTAG( 't', 'r', 'a', 'k' ), parse_trak },
{ MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },
{ MKTAG( 't', 'r', 'e', 'f' ), parse_default }, /* not really */
{ MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },
{ MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },
{ MKTAG( 'm', 'p', '4', 'v' ), parse_default },
/* extra mp4 */
{ MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },
/* QT atoms */
{ MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },
{ MKTAG( 'c', 'l', 'i', 'p' ), parse_default },
{ MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },
{ MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },
{ MKTAG( 'm', 'a', 't', 't' ), parse_default },
{ MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },
{ MKTAG( 'r', 'm', 'd', 'a' ), parse_default },
{ MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },
//{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },
{ MKTAG( 'r', 'm', 'r', 'a' ), parse_default },
{ MKTAG( 's', 'c', 'p', 't' ), parse_leaf },
{ MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },
{ MKTAG( 's', 's', 'r', 'c' ), parse_leaf },
{ MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },
{ MKTAG( 'w', 'i', 'd', 'e' ), parse_leaf }, /* place holder */
{ 0L, parse_leaf }
};
static void mov_free_stream_context(MOVStreamContext *sc)
{
if(sc) {
av_free(sc->chunk_offsets);
av_free(sc->sample_to_chunk);
av_free(sc);
}
}
/* XXX: is it suffisant ? */
static int mov_probe(AVProbeData *p)
{
/* check file header */
if (p->buf_size <= 12)
return 0;
if ((p->buf[4] == 'm' && p->buf[5] == 'o' &&
p->buf[6] == 'o' && p->buf[7] == 'v') ||
(p->buf[4] == 'm' && p->buf[5] == 'd' &&
p->buf[6] == 'a' && p->buf[7] == 't'))
return AVPROBE_SCORE_MAX;
else
return 0;
}
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MOVContext *mov = s->priv_data;
ByteIOContext *pb = &s->pb;
int i, j, nb, err;
INT64 size;
mov->fc = s;
#if 0
/* XXX: I think we should auto detect */
if(s->iformat->name[1] == 'p')
mov->mp4 = 1;
#endif
if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
size = url_filesize(url_fileno(pb));
else
size = 0x7FFFFFFFFFFFFFFF;
#ifdef DEBUG
printf("filesz=%Ld\n", size);
#endif
/* check MOV header */
err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);
if(err<0 || (!mov->found_moov || !mov->found_mdat)) {
puts("header not found !!!");
exit(1);
}
#ifdef DEBUG
printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));
#endif
/* some cleanup : make sure we are on the mdat atom */
if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
url_fseek(pb, mov->mdat_offset, SEEK_SET);
mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
#ifdef DEBUG
printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));
#endif
#ifdef DEBUG
printf("streams= %d\n", s->nb_streams);
#endif
mov->total_streams = nb = s->nb_streams;
#if 1
for(i=0; i<s->nb_streams;) {
if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
av_free(s->streams[i]);
for(j=i+1; j<s->nb_streams; j++)
s->streams[j-1] = s->streams[j];
s->nb_streams--;
} else
i++;
}
for(i=0; i<s->nb_streams;i++) {
MOVStreamContext *sc;
sc = (MOVStreamContext *)s->streams[i]->priv_data;
sc->ffindex = i;
sc->is_ff_stream = 1;
}
#endif
#ifdef DEBUG
printf("real streams= %d\n", s->nb_streams);
#endif
return 0;
}
/* Yes, this is ugly... I didn't write the specs of QT :p */
/* XXX:remove useless commented code sometime */
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
{
MOVContext *mov = s->priv_data;
INT64 offset = 0x0FFFFFFFFFFFFFFF;
int i;
int st_id = 0, size;
size = 0x0FFFFFFF;
again:
for(i=0; i<mov->total_streams; i++) {
/* printf("%8ld ", mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk]); */
if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)
&& (mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] < offset)) {
/* printf("y"); */
st_id = i;
offset = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk];
}
/* else printf("n"); */
}
mov->streams[st_id]->next_chunk++;
if(offset==0x0FFFFFFFFFFFFFFF)
return -1;
if(mov->next_chunk_offset < offset) /* some meta data */
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
if(!mov->streams[st_id]->is_ff_stream) {
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
offset = 0x0FFFFFFFFFFFFFFF;
/* puts("*"); */
goto again;
}
/* printf("\nchunk offset = %ld\n", offset); */
/* now get the chunk size... */
for(i=0; i<mov->total_streams; i++) {
/* printf("%ld ", mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset); */
if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)
&& ((mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset) < size)) {
/* printf("y"); */
size = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset;
}
/* else printf("n"); */
}
/* printf("\nchunk size = %ld\n", size); */
if(size == 0x0FFFFFFF)
size = mov->mdat_size + mov->mdat_offset - offset;
if(size < 0)
return -1;
if(size == 0)
return -1;
av_new_packet(pkt, size);
pkt->stream_index = mov->streams[st_id]->ffindex;
get_buffer(&s->pb, pkt->data, pkt->size);
#ifdef DEBUG
/*
printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);
for(i=0; i<8; i++)
printf("%02x ", pkt->data[i]);
for(i=0; i<8; i++)
printf("%c ", (pkt->data[i]) & 0x7F);
puts("");
*/
#endif
mov->next_chunk_offset = offset + size;
return 0;
}
static int mov_read_close(AVFormatContext *s)
{
int i;
MOVContext *mov = s->priv_data;
for(i=0; i<mov->total_streams; i++)
mov_free_stream_context(mov->streams[i]);
for(i=0; i<s->nb_streams; i++)
av_free(s->streams[i]);
return 0;
}
static AVInputFormat mov_iformat = {
"mov",
"QuickTime/MPEG4 format",
sizeof(MOVContext),
mov_probe,
mov_read_header,
mov_read_packet,
mov_read_close,
};
int mov_init(void)
{
av_register_input_format(&mov_iformat);
return 0;
}
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