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FFmpeg/libavformat/mov.c

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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"
#ifdef CONFIG_ZLIB
#include <zlib.h>
#endif
/*
* 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.
* FIXED, Francois Revol, 07/17/2002
* - 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
/* allows chunk splitting - should work now... */
/* in case you can't read a file, try commenting */
#define MOV_SPLIT_CHUNKS
#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_t type, uint64_t offset, uint64_t 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=0x%x size=0x%x\n",
str, tag & 0xff,
(tag >> 8) & 0xff,
(tag >> 16) & 0xff,
(tag >> 24) & 0xff,
(unsigned int)offset,
(unsigned int)size);
assert((unsigned int)size < 0x7fffffff);// catching errors
}
#else
#define print_atom(a,b,c,d)
#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 (enum CodecType) 2
static const CodecTag mov_video_tags[] = {
/* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */
/* { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */
/* { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */
/* { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */
/* Graphics */
/* Animation */
/* Apple video */
/* Kodak Photo CD */
{ CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
{ CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
/* { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
/* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */
/* Sorenson video */
{ CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
{ CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
{ CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
{ 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 */
{ CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
/* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */
{ 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, MKTAG('r', 'a', 'w', ' ') }, /* 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_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
{ CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
{ CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
{ 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 {
uint8_t version;
uint32_t flags; // 24bit
/* 0x03 ESDescrTag */
uint16_t es_id;
#define MP4ODescrTag 0x01
#define MP4IODescrTag 0x02
#define MP4ESDescrTag 0x03
#define MP4DecConfigDescrTag 0x04
#define MP4DecSpecificDescrTag 0x05
#define MP4SLConfigDescrTag 0x06
#define MP4ContentIdDescrTag 0x07
#define MP4SupplContentIdDescrTag 0x08
#define MP4IPIPtrDescrTag 0x09
#define MP4IPMPPtrDescrTag 0x0A
#define MP4IPMPDescrTag 0x0B
#define MP4RegistrationDescrTag 0x0D
#define MP4ESIDIncDescrTag 0x0E
#define MP4ESIDRefDescrTag 0x0F
#define MP4FileIODescrTag 0x10
#define MP4FileODescrTag 0x11
#define MP4ExtProfileLevelDescrTag 0x13
#define MP4ExtDescrTagsStart 0x80
#define MP4ExtDescrTagsEnd 0xFE
uint8_t stream_priority;
/* 0x04 DecConfigDescrTag */
uint8_t object_type_id;
uint8_t stream_type;
/* XXX: really streamType is
* only 6bit, followed by:
* 1bit upStream
* 1bit reserved
*/
uint32_t buffer_size_db; // 24
uint32_t max_bitrate;
uint32_t avg_bitrate;
/* 0x05 DecSpecificDescrTag */
uint8_t decoder_cfg_len;
uint8_t *decoder_cfg;
/* 0x06 SLConfigDescrTag */
uint8_t sl_config_len;
uint8_t *sl_config;
} MOV_esds_t;
struct MOVParseTableEntry;
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_t *chunk_offsets;
long sample_to_chunk_sz;
MOV_sample_to_chunk_tbl *sample_to_chunk;
long sample_to_chunk_index;
long sample_size;
long sample_count;
long *sample_sizes;
int time_scale;
long current_sample;
long left_in_chunk; /* how many samples before next chunk */
/* specific MPEG4 header which is added at the beginning of the stream */
int header_len;
MOV_esds_t esds;
uint8_t *header_data;
} 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;
int time_scale;
int duration; /* duration of the longest track */
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_t mdat_size;
int64_t 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_t next_chunk_offset;
MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
/* NOTE: for recursion save to/ restore from local variable! */
} MOVContext;
/* 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)(MOVContext *ctx,
ByteIOContext *pb,
uint32_t atom_type,
int64_t atom_offset, /* after the size and type field (and eventually the extended size) */
int64_t atom_size); /* total size (excluding the size and type fields) */
/* links atom IDs to parse functions */
typedef struct MOVParseTableEntry {
uint32_t type;
mov_parse_function func;
} MOVParseTableEntry;
static int parse_leaf(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
print_atom("leaf", atom_type, atom_offset, atom_size);
if(atom_size>1)
url_fskip(pb, atom_size);
/* url_seek(pb, atom_offset+atom_size, SEEK_SET); */
return 0;
}
static int parse_default(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
uint32_t type, foo=0;
uint64_t offset, size;
int64_t 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 + 8) < 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: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom_size, total_size);
if(size == 1) { /* 64 bit extended size */
size = get_be64(pb) - 8;
offset+=8;
total_size+=8;
}
if(size == 0) {
size = atom_size - total_size;
if (size <= 8)
break;
}
for (i=0; c->parse_table[i].type != 0L && c->parse_table[i].type != type; i++)
/* empty */;
size -= 8;
// printf(" i=%ld\n", i);
if (c->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 {
#ifdef DEBUG
//char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
//print_atom(b, type, offset, size);
#endif
err = (c->parse_table[i].func)(c, pb, type, offset, size);
}
offset+=size;
total_size+=size;
}
if (!err && total_size < atom_size && atom_size < 0x7ffff) {
printf("RESET %Ld %Ld err:%d\n", atom_size, total_size, err);
url_fskip(pb, atom_size - total_size);
}
#ifdef DEBUG
debug_indent--;
#endif
return err;
}
static int parse_ctab(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
url_fskip(pb, atom_size); // for now
return 0;
}
static int parse_mvhd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
print_atom("mvhd", atom_type, atom_offset, atom_size);
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 */
#ifdef DEBUG
printf("time scale = %i\n", c->time_scale);
#endif
c->duration = 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(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int err;
print_atom("moov", atom_type, atom_offset, atom_size);
err = parse_default(c, pb, atom_type, atom_offset, atom_size);
/* 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(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
print_atom("mdat", atom_type, atom_offset, atom_size);
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 */
}
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
/* like the files created with Adobe Premiere 5.0, for samples see */
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
static int parse_wide(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int err;
uint32_t type;
#ifdef DEBUG
print_atom("wide", atom_type, atom_offset, atom_size);
debug_indent++;
#endif
if (atom_size < 8)
return 0; /* continue */
if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
url_fskip(pb, atom_size - 4);
return 0;
}
type = get_le32(pb);
if (type != MKTAG('m', 'd', 'a', 't')) {
url_fskip(pb, atom_size - 8);
return 0;
}
err = parse_mdat(c, pb, type, atom_offset + 8, atom_size - 8);
#ifdef DEBUG
debug_indent--;
#endif
return err;
}
static int parse_trak(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
AVStream *st;
MOVStreamContext *sc;
print_atom("trak", atom_type, atom_offset, atom_size);
st = av_new_stream(c->fc, c->fc->nb_streams);
if (!st) return -2;
sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
if (!sc) {
av_free(st);
return -1;
}
sc->sample_to_chunk_index = -1;
st->priv_data = sc;
st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
st->time_length = (c->duration * 1000) / c->time_scale; // time in miliseconds
c->streams[c->fc->nb_streams-1] = sc;
return parse_default(c, pb, atom_type, atom_offset, atom_size);
}
static int parse_tkhd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
AVStream *st;
print_atom("tkhd", atom_type, atom_offset, atom_size);
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 */
st->time_length = get_be32(pb) * 1000 / c->time_scale; /* 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_mdhd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
AVStream *st;
print_atom("mdhd", atom_type, atom_offset, atom_size);
st = c->fc->streams[c->fc->nb_streams-1];
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->streams[c->total_streams]->time_scale = get_be32(pb);
#ifdef DEBUG
printf("track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->total_streams]->time_scale); /* time scale */
#endif
get_be32(pb); /* duration */
get_be16(pb); /* language */
get_be16(pb); /* quality */
return 0;
}
static int parse_hdlr(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int len = 0;
uint8_t *buf;
uint32_t type;
AVStream *st;
uint32_t ctype;
print_atom("hdlr", atom_type, atom_offset, atom_size);
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 */
/* helps parsing the string hereafter... */
c->mp4 = 0;
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 */
/* helps parsing the string hereafter... */
c->mp4 = 1;
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 */
if(c->mp4) {
/* .mp4: C string */
while(get_byte(pb) && (++len < (atom_size - 24)));
} else {
/* .mov: PASCAL string */
len = get_byte(pb);
buf = (uint8_t*) av_malloc(len+1);
if (buf) {
get_buffer(pb, buf, len);
#ifdef DEBUG
buf[len] = '\0';
printf("**buf='%s'\n", buf);
#endif
av_free(buf);
} else
url_fskip(pb, len);
}
#if 0
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);
if (buf) {
get_buffer(pb, buf, len);
buf[len] = '\0';
#ifdef DEBUG
printf("**buf='%s'\n", buf);
#endif
av_free(buf);
} else
url_fskip(pb, len)l
} else {
/* MP4 string */
for(;;) {
if (len == 0)
break;
len = get_byte(pb);
}
}
#endif
return 0;
}
static int mp4_read_descr_len(ByteIOContext *pb)
{
int len = 0;
int count = 0;
for(;;) {
int c = get_byte(pb);
len = (len << 7) | (c & 0x7f);
if ((c & 0x80) == 0)
break;
if (++count == 4)
break;
}
return len;
}
static int mp4_read_descr(ByteIOContext *pb, int *tag)
{
int len;
*tag = get_byte(pb);
len = mp4_read_descr_len(pb);
#ifdef DEBUG
printf("MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
#endif
return len;
}
static inline unsigned int get_be24(ByteIOContext *s)
{
unsigned int val;
val = get_byte(s) << 16;
val |= get_byte(s) << 8;
val |= get_byte(s);
return val;
}
static int parse_esds(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int64_t start_pos = url_ftell(pb);
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
int tag, len;
print_atom("esds", atom_type, atom_offset, atom_size);
/* Well, broken but suffisant for some MP4 streams */
get_be32(pb); /* version + flags */
len = mp4_read_descr(pb, &tag);
if (tag == MP4ESDescrTag) {
get_be16(pb); /* ID */
get_byte(pb); /* priority */
} else
get_be16(pb); /* ID */
len = mp4_read_descr(pb, &tag);
if (tag == MP4DecConfigDescrTag) {
sc->esds.object_type_id = get_byte(pb);
sc->esds.stream_type = get_be24(pb);
sc->esds.max_bitrate = get_be32(pb);
sc->esds.avg_bitrate = get_be32(pb);
len = mp4_read_descr(pb, &tag);
printf("LEN %d TAG %d m:%d a:%d\n", len, tag, sc->esds.max_bitrate, sc->esds.avg_bitrate);
if (tag == MP4DecSpecificDescrTag) {
#ifdef DEBUG
printf("Specific MPEG4 header len=%d\n", len);
#endif
sc->header_data = (uint8_t*) av_mallocz(len);
if (sc->header_data) {
get_buffer(pb, sc->header_data, len);
sc->header_len = len;
}
}
}
/* in any case, skip garbage */
url_fskip(pb, (atom_size - 8) - ((url_ftell(pb) - start_pos)));
return 0;
}
static int parse_stsd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int entries, size, frames_per_sample;
uint32_t format;
AVStream *st;
MOVStreamContext *sc;
print_atom("stsd", atom_type, atom_offset, atom_size);
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);
while(entries--) {
enum CodecID id;
size = get_be32(pb); /* size */
format = get_le32(pb); /* data format */
get_be32(pb); /* reserved */
get_be16(pb); /* reserved */
get_be16(pb); /* index */
/* for MPEG4: set codec type by looking for it */
id = codec_get_id(mov_video_tags, format);
if (id >= 0) {
AVCodec *codec;
codec = avcodec_find_decoder(id);
if (codec)
st->codec.codec_type = codec->type;
}
#ifdef DEBUG
printf("size=%d 4CC= %c%c%c%c codec_type=%d\n",
size,
(format >> 0) & 0xff,
(format >> 8) & 0xff,
(format >> 16) & 0xff,
(format >> 24) & 0xff,
st->codec.codec_type);
#endif
st->codec.codec_tag = format;
if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
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 */
#if 1
if (st->codec.codec_id == CODEC_ID_MPEG4) {
/* in some MPEG4 the width/height are not correct, so
we ignore this info */
st->codec.width = 0;
st->codec.height = 0;
}
#endif
get_be32(pb); /* horiz resolution */
get_be32(pb); /* vert resolution */
get_be32(pb); /* data size, always 0 */
frames_per_sample = get_be16(pb); /* frames per samples */
#ifdef DEBUG
printf("frames/samples = %d\n", frames_per_sample);
#endif
get_buffer(pb, (uint8_t *)st->codec.codec_name, 32); /* codec name */
st->codec.bits_per_sample = get_be16(pb); /* depth */
st->codec.color_table_id = get_be16(pb); /* colortable id */
st->codec.frame_rate = 25;
st->codec.frame_rate_base = 1;
size -= (16+8*4+2+32+2*2);
#if 0
while (size >= 8) {
int atom_size, atom_type;
int64_t start_pos;
atom_size = get_be32(pb);
atom_type = get_le32(pb);
size -= 8;
printf("NEWSIZE %d\n", size);
#ifdef DEBUG
printf("VIDEO: atom_type=%c%c%c%c atom_size=%d size_left=%d\n",
(atom_type >> 0) & 0xff,
(atom_type >> 8) & 0xff,
(atom_type >> 16) & 0xff,
(atom_type >> 24) & 0xff,
atom_size, size);
#endif
start_pos = url_ftell(pb);
switch(atom_type) {
case MKTAG('e', 's', 'd', 's'):
{
int tag, len;
/* Well, broken but suffisant for some MP4 streams */
get_be32(pb); /* version + flags */
len = mp4_read_descr(pb, &tag);
if (tag == 0x03) {
/* MP4ESDescrTag */
get_be16(pb); /* ID */
get_byte(pb); /* priority */
len = mp4_read_descr(pb, &tag);
if (tag != 0x04)
goto fail;
/* MP4DecConfigDescrTag */
get_byte(pb); /* objectTypeId */
get_be32(pb); /* streamType + buffer size */
get_be32(pb); /* max bit rate */
get_be32(pb); /* avg bit rate */
len = mp4_read_descr(pb, &tag);
if (tag != 0x05)
goto fail;
/* MP4DecSpecificDescrTag */
#ifdef DEBUG
printf("Specific MPEG4 header len=%d\n", len);
#endif
sc->header_data = av_mallocz(len);
if (sc->header_data) {
get_buffer(pb, sc->header_data, len);
sc->header_len = len;
}
}
/* in any case, skip garbage */
}
break;
default:
break;
}
fail:
printf("ATOMENEWSIZE %d %d\n", atom_size, url_ftell(pb) - start_pos);
if (atom_size > 8) {
url_fskip(pb, (atom_size - 8) -
((url_ftell(pb) - start_pos)));
size -= atom_size - 8;
printf("NEWSIZE %d\n", size);
}
}
if (size > 0) {
/* unknown extension */
url_fskip(pb, size);
}
#else
parse_default(c, pb, 0L, 0LL, size);
#endif
} else {
get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
st->codec.channels = get_be16(pb);/* channel count */
st->codec.bits_per_sample = get_be16(pb); /* sample size */
st->codec.codec_id = codec_get_id(mov_audio_tags, format);
/* handle specific s8 codec */
get_be16(pb); /* compression id = 0*/
get_be16(pb); /* packet size = 0 */
st->codec.sample_rate = ((get_be32(pb) >> 16));
printf("CODECID %d %d %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
switch (st->codec.codec_id) {
case CODEC_ID_PCM_S16BE:
if (st->codec.bits_per_sample == 8)
st->codec.codec_id = CODEC_ID_PCM_S8;
/* fall */
case CODEC_ID_PCM_U8:
st->codec.bit_rate = st->codec.sample_rate * 8;
break;
default:
;
}
get_be32(pb); /* samples per packet */
get_be32(pb); /* bytes per packet */
get_be32(pb); /* bytes per frame */
get_be32(pb); /* bytes per sample */
//if (size > 16) url_fskip(pb, size-(16+20));
#if 1
if (size >= 44 + 8) {
int fcc;
st->codec.extradata_size = get_be32(pb) - 8;
fcc = get_le32(pb); // evaw
//printf("%x %.4s %d\n", fcc, (char*)&fcc, st->codec.extradata_size);
st->codec.extradata = av_mallocz(st->codec.extradata_size);
if (st->codec.extradata)
get_buffer(pb, st->codec.extradata, st->codec.extradata_size); // FIXME url_fskip
url_fskip(pb, size-(16 + 20 + 16 + 8 + st->codec.extradata_size));
}
else
url_fskip(pb, size-(16 + 20 + 16));
#else
parse_default(c, pb, 0L, 0LL, size - (16 + 20 + 16 + 8));
#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(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int entries, i;
AVStream *st;
MOVStreamContext *sc;
print_atom("stco", atom_type, atom_offset, atom_size);
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 = (int64_t*) av_malloc(entries * sizeof(int64_t));
if (!sc->chunk_offsets)
return -1;
if(atom_type == MKTAG('s', 't', 'c', 'o')) {
for(i=0; i<entries; i++) {
sc->chunk_offsets[i] = get_be32(pb);
}
} else if(atom_type == MKTAG('c', 'o', '6', '4')) {
for(i=0; i<entries; i++) {
sc->chunk_offsets[i] = get_be64(pb);
}
} else
return -1;
#ifdef DEBUG
/*
for(i=0; i<entries; i++) {
printf("chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
}
*/
#endif
return 0;
}
static int parse_stsc(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int entries, i;
AVStream *st;
MOVStreamContext *sc;
print_atom("stsc", atom_type, atom_offset, atom_size);
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);
#ifdef DEBUG
printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
#endif
sc->sample_to_chunk_sz = entries;
sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
if (!sc->sample_to_chunk)
return -1;
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(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int entries, i;
AVStream *st;
MOVStreamContext *sc;
print_atom("stsz", atom_type, atom_offset, atom_size);
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;
#ifdef DEBUG
printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
#endif
if(sc->sample_size)
return 0; /* there isn't any table following */
sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
if (!sc->sample_sizes)
return -1;
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 int parse_stts(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
int entries, i;
AVStream *st;
MOVStreamContext *sc;
print_atom("stts", atom_type, atom_offset, atom_size);
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);
#ifdef DEBUG
printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
#endif
for(i=0; i<entries; i++) {
int sample_duration;
get_be32(pb);
sample_duration = get_be32(pb);
if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
st->codec.frame_rate_base = sample_duration ? sample_duration : 1;
st->codec.frame_rate = c->streams[c->total_streams]->time_scale;
#ifdef DEBUG
printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);
#endif
}
}
return 0;
}
#ifdef CONFIG_ZLIB
static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
{
return -1;
}
static int parse_cmov(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)
{
ByteIOContext ctx;
uint8_t *cmov_data;
uint8_t *moov_data; /* uncompressed data */
long cmov_len, moov_len;
int ret;
print_atom("cmov", atom_type, atom_offset, atom_size);
get_be32(pb); /* dcom atom */
if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
return -1;
if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
puts("unknown compression for cmov atom !");
return -1;
}
get_be32(pb); /* cmvd atom */
if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
return -1;
moov_len = get_be32(pb); /* uncompressed size */
cmov_len = atom_size - 6 * 4;
cmov_data = (uint8_t *) av_malloc(cmov_len);
if (!cmov_data)
return -1;
moov_data = (uint8_t *) av_malloc(moov_len);
if (!moov_data) {
av_free(cmov_data);
return -1;
}
get_buffer(pb, cmov_data, cmov_len);
if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
return -1;
if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
return -1;
ctx.buf_end = ctx.buffer + moov_len;
ret = parse_default(c, &ctx, MKTAG( 'm', 'o', 'o', 'v' ), 0, moov_len);
av_free(moov_data);
av_free(cmov_data);
return ret;
}
#endif
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', '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_leaf },
{ 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_mdhd },
{ 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_stts },
{ 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_wide }, /* place holder */
{ MKTAG( 'c', 't', 'a', 'b' ), parse_ctab },
{ MKTAG( 'e', 's', 'd', 's' ), parse_esds },
#ifdef CONFIG_ZLIB
{ MKTAG( 'c', 'm', 'o', 'v' ), parse_cmov },
#else
{ MKTAG( 'c', 'm', 'o', 'v' ), parse_leaf },
#endif
{ 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->sample_sizes);
av_free(sc->header_data);
av_free(sc);
}
}
static inline uint32_t to_tag(uint8_t *buf)
{
return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
}
static inline uint32_t to_be32(uint8_t *buf)
{
return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}
/* XXX: is it sufficient ? */
static int mov_probe(AVProbeData *p)
{
unsigned int offset;
uint32_t tag;
/* check file header */
if (p->buf_size <= 12)
return 0;
offset = 0;
for(;;) {
/* ignore invalid offset */
if ((offset + 8) > (unsigned int)p->buf_size)
return 0;
tag = to_tag(p->buf + offset + 4);
switch(tag) {
case MKTAG( 'm', 'o', 'o', 'v' ):
case MKTAG( 'w', 'i', 'd', 'e' ):
case MKTAG( 'f', 'r', 'e', 'e' ):
case MKTAG( 'm', 'd', 'a', 't' ):
case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
return AVPROBE_SCORE_MAX;
case MKTAG( 'f', 't', 'y', 'p' ):
case MKTAG( 's', 'k', 'i', 'p' ):
offset = to_be32(p->buf) + offset;
break;
default:
/* unrecognized tag */
return 0;
}
}
return 0;
}
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MOVContext *mov = (MOVContext *) s->priv_data;
ByteIOContext *pb = &s->pb;
int i, j, nb, err;
int64_t size;
mov->fc = s;
mov->parse_table = mov_default_parse_table;
#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, pb, 0L, 0LL, size);
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 = (MOVContext *) s->priv_data;
MOVStreamContext *sc;
int64_t offset = 0x0FFFFFFFFFFFFFFF;
int i;
int size;
size = 0x0FFFFFFF;
#ifdef MOV_SPLIT_CHUNKS
if (mov->partial) {
int idx;
sc = mov->partial;
idx = sc->sample_to_chunk_index;
if (idx < 0) return 0;
size = sc->sample_sizes[sc->current_sample];
sc->current_sample++;
sc->left_in_chunk--;
if (sc->left_in_chunk <= 0)
mov->partial = 0;
offset = mov->next_chunk_offset;
/* extract the sample */
goto readchunk;
}
#endif
again:
sc = 0;
for(i=0; i<mov->total_streams; i++) {
MOVStreamContext *msc = mov->streams[i];
//printf("MOCHUNK %ld %d %p pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));
if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
&& (msc->chunk_offsets[msc->next_chunk] < offset)) {
sc = msc;
offset = msc->chunk_offsets[msc->next_chunk];
//printf("SELETED %Ld i:%d\n", offset, i);
}
}
if (!sc || offset==0x0FFFFFFFFFFFFFFF)
return -1;
sc->next_chunk++;
if(mov->next_chunk_offset < offset) { /* some meta data */
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
mov->next_chunk_offset = offset;
}
//printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
if(!sc->is_ff_stream) {
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
mov->next_chunk_offset = offset;
offset = 0x0FFFFFFFFFFFFFFF;
goto again;
}
/* now get the chunk size... */
for(i=0; i<mov->total_streams; i++) {
MOVStreamContext *msc = mov->streams[i];
if ((msc->next_chunk < msc->chunk_count)
&& ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
size = msc->chunk_offsets[msc->next_chunk] - offset;
}
#ifdef MOV_SPLIT_CHUNKS
/* split chunks into samples */
if (sc->sample_size == 0) {
int idx = sc->sample_to_chunk_index;
if ((idx + 1 < sc->sample_to_chunk_sz)
&& (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))
idx++;
sc->sample_to_chunk_index = idx;
if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
mov->partial = sc;
/* we'll have to get those samples before next chunk */
sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
size = sc->sample_sizes[sc->current_sample];
}
sc->current_sample++;
}
#endif
readchunk:
//printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);
if(size == 0x0FFFFFFF)
size = mov->mdat_size + mov->mdat_offset - offset;
if(size < 0)
return -1;
if(size == 0)
return -1;
url_fseek(&s->pb, offset, SEEK_SET);
//printf("READCHUNK hlen: %d %d off: %Ld pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));
if (sc->header_len > 0) {
av_new_packet(pkt, size + sc->header_len);
memcpy(pkt->data, sc->header_data, sc->header_len);
get_buffer(&s->pb, pkt->data + sc->header_len, size);
/* free header */
av_freep(&sc->header_data);
sc->header_len = 0;
} else {
av_new_packet(pkt, size);
get_buffer(&s->pb, pkt->data, pkt->size);
}
pkt->stream_index = sc->ffindex;
#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 = (MOVContext *) 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_freep(&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;
}