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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <limits.h>
//#define DEBUG
#include "avformat.h"
#include "avi.h"
#include "mov.h"
#ifdef CONFIG_ZLIB
#include <zlib.h>
#endif
/*
* First version by Francois Revol revol@free.fr
* Seek function by Gael Chardon gael.dev@4now.net
*
* 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 :-)
* - seek is not supported with files that contain edit list
*
* 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/documentation/QuickTime/QTFF/
* http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
* QuickTime is a trademark of Apple (AFAIK :))
*/
#include "qtpalette.h"
#undef NDEBUG
#include <assert.h>
/* Allows seeking */
#define MOV_SEEK
/* Special handling for movies created with Minolta Dimaxe Xi*/
/* this fix should not interfere with other .mov files, but just in case*/
#define MOV_MINOLTA_FIX
/* 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
/* http://gpac.sourceforge.net/tutorial/mediatypes.htm */
const CodecTag ff_mov_obj_type[] = {
{ CODEC_ID_MPEG4 , 32 },
{ CODEC_ID_H264 , 33 },
{ CODEC_ID_AAC , 64 },
{ CODEC_ID_MPEG2VIDEO, 96 }, /* MPEG2 Simple */
{ CODEC_ID_MPEG2VIDEO, 97 }, /* MPEG2 Main */
{ CODEC_ID_MPEG2VIDEO, 98 }, /* MPEG2 SNR */
{ CODEC_ID_MPEG2VIDEO, 99 }, /* MPEG2 Spatial */
{ CODEC_ID_MPEG2VIDEO, 100 }, /* MPEG2 High */
{ CODEC_ID_MPEG2VIDEO, 101 }, /* MPEG2 422 */
{ CODEC_ID_AAC , 102 }, /* MPEG2 AAC Main */
{ CODEC_ID_AAC , 103 }, /* MPEG2 AAC Low */
{ CODEC_ID_AAC , 104 }, /* MPEG2 AAC SSR */
{ CODEC_ID_MP3 , 105 },
{ CODEC_ID_MPEG1VIDEO, 106 },
{ CODEC_ID_MP2 , 107 },
{ CODEC_ID_MJPEG , 108 },
{ CODEC_ID_PCM_S16LE , 224 },
{ CODEC_ID_VORBIS , 225 },
{ CODEC_ID_AC3 , 226 },
{ CODEC_ID_PCM_ALAW , 227 },
{ CODEC_ID_PCM_MULAW , 228 },
{ CODEC_ID_PCM_S16BE , 230 },
{ CODEC_ID_H263 , 242 },
{ CODEC_ID_H261 , 243 },
{ 0, 0 },
};
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_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
{ 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_MPEG4, MKTAG('X', 'V', 'I', 'D') },
{ CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
/* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
{ CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
{ CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
{ 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 */
{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
{ CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
{ CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
{ CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
{ CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
{ CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
{ CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
{ CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
{ CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 produced by Sony HD camera */
{ CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX 635/50 50mb/s produced by FCP */
{ CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX 635/50 30mb/s produced by FCP */
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
//{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD produced by FCP */
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 produced by FCP */
{ CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* HDV produced by FCP */
//{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
{ CODEC_ID_NONE, 0 },
};
static const CodecTag mov_audio_tags[] = {
{ CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
{ CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
/* { 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 */
/* The standard for mpeg4 audio is still not normalised AFAIK anyway */
{ CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
{ CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
{ CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */
{ CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
{ CODEC_ID_QDM2,MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
{ CODEC_ID_NONE, 0 },
};
/* map numeric codes from mdhd atom to ISO 639 */
/* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
/* http://developer.apple.com/documentation/mac/Text/Text-368.html */
/* deprecated by putting the code as 3*5bit ascii */
static const char *mov_mdhd_language_map[] = {
/* 0-9 */
"eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
"heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
"urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav", NULL,
"fo ", NULL, "rus", "chi", NULL, "iri", "alb", "ron", "ces", "slk",
"slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
/*?*/
"aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon", NULL, "pus",
"kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
"pa ", "ori", "mal", "kan", "tam", "tel", NULL, "bur", "khm", "lao",
/* roman? arabic? */
"vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
/*==rundi?*/
NULL, "run", NULL, "mlg", "epo", NULL, NULL, NULL, NULL, NULL,
/* 100 */
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "wel", "baq",
"cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
};
/* 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 {
uint32_t type;
int64_t offset;
int64_t size; /* total size (excluding the size and type fields) */
} MOV_atom_t;
typedef struct {
int seed;
int flags;
int size;
void* clrs;
} MOV_ctab_t;
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 Time2Sample{
int count;
int duration;
}Time2Sample;
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;
int stts_count;
Time2Sample *stts_data;
int ctts_count;
Time2Sample *ctts_data;
int edit_count; /* number of 'edit' (elst atom) */
long sample_to_chunk_sz;
MOV_sample_to_chunk_tbl *sample_to_chunk;
long sample_to_chunk_index;
int sample_to_time_index;
long sample_to_time_sample;
uint64_t sample_to_time_time;
int sample_to_ctime_index;
int sample_to_ctime_sample;
long sample_size;
long sample_count;
long *sample_sizes;
long keyframe_count;
long *keyframes;
int time_scale;
int time_rate;
long current_sample;
long left_in_chunk; /* how many samples before next chunk */
MOV_esds_t esds;
} 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 ni; ///< non interleaved mode
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 */
int ctab_size;
MOV_ctab_t **ctab; /* color tables */
const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
/* NOTE: for recursion save to/ restore from local variable! */
AVPaletteControl palette_control;
} 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, MOV_atom_t atom);
/* links atom IDs to parse functions */
typedef struct MOVParseTableEntry {
uint32_t type;
mov_parse_function func;
} MOVParseTableEntry;
static int ff_mov_lang_to_iso639(int code, char *to)
{
int i;
/* is it the mangled iso code? */
/* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
if (code > 138) {
for (i = 2; i >= 0; i--) {
to[i] = 0x60 + (code & 0x1f);
code >>= 5;
}
return 1;
}
/* old fashion apple lang code */
if (code >= (sizeof(mov_mdhd_language_map)/sizeof(char *)))
return 0;
if (!mov_mdhd_language_map[code])
return 0;
strncpy(to, mov_mdhd_language_map[code], 4);
return 1;
}
extern int ff_mov_iso639_to_lang(const char *lang, int mp4); /* for movenc.c */
int ff_mov_iso639_to_lang(const char *lang, int mp4)
{
int i, code = 0;
/* old way, only for QT? */
for (i = 0; !mp4 && (i < (sizeof(mov_mdhd_language_map)/sizeof(char *))); i++) {
if (mov_mdhd_language_map[i] && !strcmp(lang, mov_mdhd_language_map[i]))
return i;
}
/* XXX:can we do that in mov too? */
if (!mp4)
return 0;
/* handle undefined as such */
if (lang[0] == '\0')
lang = "und";
/* 5bit ascii */
for (i = 0; i < 3; i++) {
unsigned char c = (unsigned char)lang[i];
if (c < 0x60)
return 0;
if (c > 0x60 + 0x1f)
return 0;
code <<= 5;
code |= (c - 0x60);
}
return code;
}
static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
if (atom.size>1)
url_fskip(pb, atom.size);
/* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
return 0;
}
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
int64_t total_size = 0;
MOV_atom_t a;
int i;
int err = 0;
a.offset = atom.offset;
if (atom.size < 0)
atom.size = 0x7fffffffffffffffLL;
while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
a.size = atom.size;
a.type=0L;
if(atom.size >= 8) {
a.size = get_be32(pb);
a.type = get_le32(pb);
}
total_size += 8;
a.offset += 8;
dprintf("type: %08x %.4s sz: %Lx %Lx %Lx\n", a.type, (char*)&a.type, a.size, atom.size, total_size);
if (a.size == 1) { /* 64 bit extended size */
a.size = get_be64(pb) - 8;
a.offset += 8;
total_size += 8;
}
if (a.size == 0) {
a.size = atom.size - total_size;
if (a.size <= 8)
break;
}
for (i = 0; c->parse_table[i].type != 0L
&& c->parse_table[i].type != a.type; i++)
/* empty */;
a.size -= 8;
if(a.size < 0)
break;
if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
url_fskip(pb, a.size);
} else {
err = (c->parse_table[i].func)(c, pb, a);
}
a.offset += a.size;
total_size += a.size;
}
if (!err && total_size < atom.size && atom.size < 0x7ffff) {
url_fskip(pb, atom.size - total_size);
}
return err;
}
static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
#if 1
url_fskip(pb, atom.size); // for now
#else
VERY VERY BROKEN, NEVER execute this, needs rewrite
unsigned int len;
MOV_ctab_t *t;
c->ctab = av_realloc(c->ctab, ++c->ctab_size);
t = c->ctab[c->ctab_size];
t->seed = get_be32(pb);
t->flags = get_be16(pb);
t->size = get_be16(pb) + 1;
len = 2 * t->size * 4;
if (len > 0) {
t->clrs = av_malloc(len); // 16bit A R G B
if (t->clrs)
get_buffer(pb, t->clrs, len);
}
#endif
return 0;
}
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
int len = 0;
uint32_t type;
uint32_t ctype;
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 */
dprintf("ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype);
dprintf("stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
if(ctype == MKTAG('m', 'h', 'l', 'r')) /* MOV */
c->mp4 = 0;
else if(ctype == 0)
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);
url_fskip(pb, len);
}
url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
return 0;
}
static int mov_mp4_read_descr_len(ByteIOContext *pb)
{
int len = 0;
int count = 4;
while (count--) {
int c = get_byte(pb);
len = (len << 7) | (c & 0x7f);
if (!(c & 0x80))
break;
}
return len;
}
static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
{
int len;
*tag = get_byte(pb);
len = mov_mp4_read_descr_len(pb);
dprintf("MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
return len;
}
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
int64_t start_pos = url_ftell(pb);
int tag, len;
/* Well, broken but suffisant for some MP4 streams */
get_be32(pb); /* version + flags */
len = mov_mp4_read_descr(pb, &tag);
if (tag == MP4ESDescrTag) {
get_be16(pb); /* ID */
get_byte(pb); /* priority */
} else
get_be16(pb); /* ID */
len = mov_mp4_read_descr(pb, &tag);
if (tag == MP4DecConfigDescrTag) {
sc->esds.object_type_id = get_byte(pb);
sc->esds.stream_type = get_byte(pb);
sc->esds.buffer_size_db = get_be24(pb);
sc->esds.max_bitrate = get_be32(pb);
sc->esds.avg_bitrate = get_be32(pb);
st->codec->codec_id= codec_get_id(ff_mov_obj_type, sc->esds.object_type_id);
len = mov_mp4_read_descr(pb, &tag);
if (tag == MP4DecSpecificDescrTag) {
dprintf("Specific MPEG4 header len=%d\n", len);
st->codec->extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
if (st->codec->extradata) {
get_buffer(pb, st->codec->extradata, len);
st->codec->extradata_size = len;
}
}
}
/* in any case, skip garbage */
url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
return 0;
}
/* this atom contains actual media data */
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
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 mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
uint32_t type = get_le32(pb);
/* from mplayer */
switch (type) {
case MKTAG('i', 's', 'o', 'm'):
case MKTAG('m', 'p', '4', '1'):
case MKTAG('m', 'p', '4', '2'):
case MKTAG('3', 'g', 'p', '1'):
case MKTAG('3', 'g', 'p', '2'):
case MKTAG('3', 'g', '2', 'a'):
case MKTAG('3', 'g', 'p', '3'):
case MKTAG('3', 'g', 'p', '4'):
case MKTAG('3', 'g', 'p', '5'):
case MKTAG('m', 'm', 'p', '4'): /* Mobile MP4 */
case MKTAG('M', '4', 'A', ' '): /* Apple iTunes AAC-LC Audio */
case MKTAG('M', '4', 'P', ' '): /* Apple iTunes AAC-LC Protected Audio */
c->mp4 = 1;
case MKTAG('q', 't', ' ', ' '):
av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
}
get_be32(pb); /* minor version */
url_fskip(pb, atom.size - 8);
return 0;
}
/* this atom should contain all header atoms */
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
int err;
err = mov_read_default(c, pb, atom);
/* 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 */
}
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
int version;
int lang;
version = get_byte(pb); /* version */
if (version > 1)
return 1; /* unsupported */
get_byte(pb); get_byte(pb);
get_byte(pb); /* flags */
(version==1)?get_be64(pb):get_be32(pb); /* creation time */
(version==1)?get_be64(pb):get_be32(pb); /* modification time */
c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
c->fc->streams[c->fc->nb_streams-1]->duration = (version==1)?get_be64(pb):get_be32(pb); /* duration */
lang = get_be16(pb); /* language */
ff_mov_lang_to_iso639(lang, c->fc->streams[c->fc->nb_streams-1]->language);
get_be16(pb); /* quality */
return 0;
}
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
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
av_log(NULL, AV_LOG_DEBUG, "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;
}
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
if((uint64_t)atom.size > (1<<30))
return -1;
// currently SVQ3 decoder expect full STSD header - so let's fake it
// this should be fixed and just SMI header should be passed
av_free(st->codec->extradata);
st->codec->extradata_size = 0x5a + atom.size;
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (st->codec->extradata) {
strcpy(st->codec->extradata, "SVQ3"); // fake
get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
dprintf("Reading SMI %Ld %s\n", atom.size, (char*)st->codec->extradata + 0x5a);
} else
url_fskip(pb, atom.size);
return 0;
}
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
int little_endian = get_be16(pb);
if (little_endian) {
switch (st->codec->codec_id) {
case CODEC_ID_PCM_S24BE:
st->codec->codec_id = CODEC_ID_PCM_S24LE;
break;
case CODEC_ID_PCM_S32BE:
st->codec->codec_id = CODEC_ID_PCM_S32LE;
break;
default:
break;
}
}
return 0;
}
static int mov_read_alac(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
// currently ALAC decoder expect full atom header - so let's fake it
// this should be fixed and just ALAC header should be passed
av_free(st->codec->extradata);
st->codec->extradata_size = 36;
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (st->codec->extradata) {
strcpy(st->codec->extradata + 4, "alac"); // fake
get_buffer(pb, st->codec->extradata + 8, 36 - 8);
dprintf("Reading alac %Ld %s\n", st->codec->extradata_size, (char*)st->codec->extradata);
} else
url_fskip(pb, atom.size);
return 0;
}
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
offset_t start_pos = url_ftell(pb);
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
if((uint64_t)atom.size > (1<<30))
return -1;
if (st->codec->codec_id == CODEC_ID_QDM2) {
// pass all frma atom to codec, needed at least for QDM2
av_free(st->codec->extradata);
st->codec->extradata_size = atom.size;
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (st->codec->extradata) {
get_buffer(pb, st->codec->extradata, atom.size);
} else
url_fskip(pb, atom.size);
} else if (atom.size > 8) { /* to read frma, esds atoms */
mov_read_default(c, pb, atom);
} else if (atom.size > 0)
url_fskip(pb, atom.size);
/* in any case, skip garbage */
url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
return 0;
}
static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
if((uint64_t)atom.size > (1<<30))
return -1;
av_free(st->codec->extradata);
st->codec->extradata_size = atom.size;
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (st->codec->extradata) {
get_buffer(pb, st->codec->extradata, atom.size);
} else
url_fskip(pb, atom.size);
return 0;
}
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
unsigned int i, entries;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
if(entries >= UINT_MAX/sizeof(int64_t))
return -1;
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;
for(i=0; i<c->fc->nb_streams; i++){
MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data;
if(sc2 && sc2->chunk_offsets){
int64_t first= sc2->chunk_offsets[0];
int64_t last= sc2->chunk_offsets[sc2->chunk_count-1];
if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0])
c->ni=1;
}
}
return 0;
}
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
int entries, frames_per_sample;
uint32_t format;
uint8_t codec_name[32];
/* for palette traversal */
int color_depth;
int color_start;
int color_count;
int color_end;
int color_index;
int color_dec;
int color_greyscale;
unsigned char *color_table;
int j;
unsigned char r, g, b;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
while(entries--) { //Parsing Sample description table
enum CodecID id;
MOV_atom_t a = { 0, 0, 0 };
offset_t start_pos = url_ftell(pb);
int size = get_be32(pb); /* size */
format = get_le32(pb); /* data format */
get_be32(pb); /* reserved */
get_be16(pb); /* reserved */
get_be16(pb); /* index */
dprintf("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);
st->codec->codec_tag = format;
/* codec_type is set earlier by read_hdlr */
if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
/* for MPEG4: set codec type by looking for it */
id = codec_get_id(mov_video_tags, format);
if(id <= 0)
id = codec_get_id(codec_bmp_tags, format);
st->codec->codec_id = id;
get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
get_be32(pb); /* temporal quality */
get_be32(pb); /* spacial quality */
if(st->codec->codec_id == CODEC_ID_MPEG4){ //FIXME this is silly
get_be16(pb);
get_be16(pb);
}else{
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); /* frames per samples */
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
#endif
get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
if (codec_name[0] <= 31) {
memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
st->codec->codec_name[codec_name[0]] = 0;
}
st->codec->bits_per_sample = get_be16(pb); /* depth */
st->codec->color_table_id = get_be16(pb); /* colortable id */
/* These are set in mov_read_stts and might already be set!
st->codec->time_base.den = 25;
st->codec->time_base.num = 1;
*/
/* figure out the palette situation */
color_depth = st->codec->bits_per_sample & 0x1F;
color_greyscale = st->codec->bits_per_sample & 0x20;
/* if the depth is 2, 4, or 8 bpp, file is palettized */
if ((color_depth == 2) || (color_depth == 4) ||
(color_depth == 8)) {
if (color_greyscale) {
/* compute the greyscale palette */
color_count = 1 << color_depth;
color_index = 255;
color_dec = 256 / (color_count - 1);
for (j = 0; j < color_count; j++) {
r = g = b = color_index;
c->palette_control.palette[j] =
(r << 16) | (g << 8) | (b);
color_index -= color_dec;
if (color_index < 0)
color_index = 0;
}
} else if (st->codec->color_table_id & 0x08) {
/* if flag bit 3 is set, use the default palette */
color_count = 1 << color_depth;
if (color_depth == 2)
color_table = ff_qt_default_palette_4;
else if (color_depth == 4)
color_table = ff_qt_default_palette_16;
else
color_table = ff_qt_default_palette_256;
for (j = 0; j < color_count; j++) {
r = color_table[j * 4 + 0];
g = color_table[j * 4 + 1];
b = color_table[j * 4 + 2];
c->palette_control.palette[j] =
(r << 16) | (g << 8) | (b);
}
} else {
/* load the palette from the file */
color_start = get_be32(pb);
color_count = get_be16(pb);
color_end = get_be16(pb);
for (j = color_start; j <= color_end; j++) {
/* each R, G, or B component is 16 bits;
* only use the top 8 bits; skip alpha bytes
* up front */
get_byte(pb);
get_byte(pb);
r = get_byte(pb);
get_byte(pb);
g = get_byte(pb);
get_byte(pb);
b = get_byte(pb);
get_byte(pb);
c->palette_control.palette[j] =
(r << 16) | (g << 8) | (b);
}
}
st->codec->palctrl = &c->palette_control;
st->codec->palctrl->palette_changed = 1;
} else
st->codec->palctrl = NULL;
} else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
uint16_t version = get_be16(pb);
st->codec->codec_id = codec_get_id(mov_audio_tags, format);
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 */
/* do we need to force to 16 for AMR ? */
/* handle specific s8 codec */
get_be16(pb); /* compression id = 0*/
get_be16(pb); /* packet size = 0 */
st->codec->sample_rate = ((get_be32(pb) >> 16));
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:
if (st->codec->bits_per_sample == 16)
st->codec->codec_id = CODEC_ID_PCM_S16BE;
st->codec->bit_rate = st->codec->sample_rate * 8;
break;
case CODEC_ID_AMR_WB:
st->codec->sample_rate = 16000; /* should really we ? */
st->codec->channels=1; /* really needed */
break;
case CODEC_ID_AMR_NB:
st->codec->sample_rate = 8000; /* should really we ? */
st->codec->channels=1; /* really needed */
break;
default:
break;
}
//Read QT version 1 fields. In version 0 theese dont exist
dprintf("version =%d mp4=%d\n",version,c->mp4);
if(version==1) {
get_be32(pb); /* samples per packet */
get_be32(pb); /* bytes per packet */
get_be32(pb); /* bytes per frame */
get_be32(pb); /* bytes per sample */
}
} else {
/* other codec type, just skip (rtp, mp4s, tmcd ...) */
url_fskip(pb, size - (url_ftell(pb) - start_pos));
}
/* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
a.size = size - (url_ftell(pb) - start_pos);
if (a.size > 8)
mov_read_default(c, pb, a);
else if (a.size > 0)
url_fskip(pb, a.size);
}
if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) {
st->codec->sample_rate= sc->time_scale;
}
return 0;
}
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
unsigned int i, entries;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))
return -1;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "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);
}
return 0;
}
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
unsigned int i, entries;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
if(entries >= UINT_MAX / sizeof(long))
return -1;
sc->keyframe_count = entries;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
#endif
sc->keyframes = (long*) av_malloc(entries * sizeof(long));
if (!sc->keyframes)
return -1;
for(i=0; i<entries; i++) {
sc->keyframes[i] = get_be32(pb);
#ifdef DEBUG
/* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
#endif
}
return 0;
}
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
unsigned int i, entries;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
sc->sample_size = get_be32(pb);
entries = get_be32(pb);
if(entries >= UINT_MAX / sizeof(long))
return -1;
sc->sample_count = entries;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "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
av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);
#endif
}
return 0;
}
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
unsigned int i, entries;
int64_t duration=0;
int64_t total_sample_count=0;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
if(entries >= UINT_MAX / sizeof(Time2Sample))
return -1;
sc->stts_count = entries;
sc->stts_data = av_malloc(entries * sizeof(Time2Sample));
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
#endif
sc->time_rate=0;
for(i=0; i<entries; i++) {
int sample_duration;
int sample_count;
sample_count=get_be32(pb);
sample_duration = get_be32(pb);
sc->stts_data[i].count= sample_count;
sc->stts_data[i].duration= sample_duration;
sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
dprintf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
duration+=sample_duration*sample_count;
total_sample_count+=sample_count;
}
st->nb_frames= total_sample_count;
if(duration)
st->duration= duration;
return 0;
}
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
unsigned int i, entries;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
if(entries >= UINT_MAX / sizeof(Time2Sample))
return -1;
c->streams[c->fc->nb_streams-1]->ctts_count = entries;
c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));
dprintf("track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
for(i=0; i<entries; i++) {
c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
}
return 0;
}
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st;
MOVStreamContext *sc;
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->start_time = 0; /* XXX: check */
c->streams[c->fc->nb_streams-1] = sc;
return mov_read_default(c, pb, atom);
}
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st;
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->start_time = 0; /* check */
get_be32(pb); /* highlevel (considering edits) duration in movie timebase */
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;
}
/* 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 mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
int err;
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;
}
atom.type = get_le32(pb);
atom.offset += 8;
atom.size -= 8;
if (atom.type != MKTAG('m', 'd', 'a', 't')) {
url_fskip(pb, atom.size);
return 0;
}
err = mov_read_mdat(c, pb, atom);
return err;
}
#ifdef CONFIG_ZLIB
static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
{
return -1;
}
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
ByteIOContext ctx;
uint8_t *cmov_data;
uint8_t *moov_data; /* uncompressed data */
long cmov_len, moov_len;
int ret;
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' )) {
av_log(NULL, AV_LOG_ERROR, "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;
atom.type = MKTAG( 'm', 'o', 'o', 'v' );
atom.offset = 0;
atom.size = moov_len;
#ifdef DEBUG
// { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
#endif
ret = mov_read_default(c, &ctx, atom);
av_free(moov_data);
av_free(cmov_data);
return ret;
}
#endif
/* edit list atom */
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
int i, edit_count;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */
for(i=0; i<edit_count; i++){
get_be32(pb); /* Track duration */
get_be32(pb); /* Media time */
get_be32(pb); /* Media rate */
}
dprintf("track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);
return 0;
}
static const MOVParseTableEntry mov_default_parse_table[] = {
/* mp4 atoms */
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
{ MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
{ MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
{ MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
{ MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
{ MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
{ MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
{ MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
{ MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },
{ MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
{ MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },
{ MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
{ MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
{ MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
{ MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
{ MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
{ MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
{ MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
{ MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
{ MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
{ MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
{ MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
{ MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
{ MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
{ MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
{ MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
{ MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
{ MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
{ MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
{ MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
{ MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
{ MKTAG( 'a', 'l', 'a', 'c' ), mov_read_alac }, /* alac specific atom */
{ MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },
{ MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
{ MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
{ MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
{ MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
{ MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
{ MKTAG( 's', 't', 's', 'h' ), mov_read_default },
{ MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
{ MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
{ MKTAG( 's', 't', 't', 's' ), mov_read_stts },
{ MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
{ MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
{ MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
{ MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
{ MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
{ MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
{ MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },
{ MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
{ MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
/* extra mp4 */
{ MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
/* QT atoms */
{ MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
{ MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
{ MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
{ MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
{ MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
{ MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
{ MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
{ MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
{ MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
{ MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
{ MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
{ MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
{ MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
{ MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
{ MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
{ MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
//{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
#ifdef CONFIG_ZLIB
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
#else
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
#endif
{ 0L, mov_read_leaf }
};
static void mov_free_stream_context(MOVStreamContext *sc)
{
if(sc) {
av_freep(&sc->chunk_offsets);
av_freep(&sc->sample_to_chunk);
av_freep(&sc->sample_sizes);
av_freep(&sc->keyframes);
av_freep(&sc->stts_data);
av_freep(&sc->ctts_data);
av_freep(&sc);
}
}
static inline uint32_t mov_to_tag(uint8_t *buf)
{
return MKTAG(buf[0], buf[1], buf[2], buf[3]);
}
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;
int score = 0;
/* 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 score;
tag = mov_to_tag(p->buf + offset + 4);
switch(tag) {
/* check for obvious tags */
case MKTAG( 'm', 'o', 'o', 'v' ):
case MKTAG( 'm', 'd', 'a', 't' ):
case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
return AVPROBE_SCORE_MAX;
/* those are more common words, so rate then a bit less */
case MKTAG( 'w', 'i', 'd', 'e' ):
case MKTAG( 'f', 'r', 'e', 'e' ):
case MKTAG( 'j', 'u', 'n', 'k' ):
case MKTAG( 'p', 'i', 'c', 't' ):
return AVPROBE_SCORE_MAX - 5;
case MKTAG( 'f', 't', 'y', 'p' ):
case MKTAG( 's', 'k', 'i', 'p' ):
case MKTAG( 'u', 'u', 'i', 'd' ):
offset = to_be32(p->buf+offset) + offset;
/* if we only find those cause probedata is too small at least rate them */
score = AVPROBE_SCORE_MAX - 50;
break;
default:
/* unrecognized tag */
return score;
}
}
return score;
}
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MOVContext *mov = (MOVContext *) s->priv_data;
ByteIOContext *pb = &s->pb;
int i, j, nb, err;
MOV_atom_t atom = { 0, 0, 0 };
mov->fc = s;
mov->parse_table = mov_default_parse_table;
if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
atom.size = url_fsize(pb);
else
atom.size = 0x7FFFFFFFFFFFFFFFLL;
/* check MOV header */
err = mov_read_default(mov, pb, atom);
if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",
err, mov->found_moov, mov->found_mdat, url_ftell(pb));
return -1;
}
dprintf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));
/* 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 */
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 = (MOVStreamContext *)s->streams[i]->priv_data;
if(!sc->time_rate)
sc->time_rate=1;
av_set_pts_info(s->streams[i], 64, sc->time_rate, sc->time_scale);
if(s->streams[i]->duration != AV_NOPTS_VALUE){
assert(s->streams[i]->duration % sc->time_rate == 0);
s->streams[i]->duration /= sc->time_rate;
}
sc->ffindex = i;
sc->is_ff_stream = 1;
}
#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;
AVStream *st;
int64_t offset = INT64_MAX;
int64_t best_dts = INT64_MAX;
int i, a, b, m;
int size;
int idx;
size = 0x0FFFFFFF;
if (mov->partial) {
sc = mov->partial;
idx = sc->sample_to_chunk_index;
if (idx < 0) return 0;
dprintf("sc[ffid %d]->sample_size = %ld\n", sc->ffindex, sc->sample_size);
//size = sc->sample_sizes[sc->current_sample];
// that ain't working...
//size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];
size = (sc->sample_size > 1)?sc->sample_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;
}
again:
sc = 0;
if(offset == INT64_MAX)
best_dts= INT64_MAX;
for(i=0; i<mov->total_streams; i++) {
MOVStreamContext *msc = mov->streams[i];
if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){
if (msc->sample_to_time_index < msc->stts_count && mov->ni) {
int64_t dts;
int index= msc->sample_to_time_index;
int sample= msc->sample_to_time_sample;
int time= msc->sample_to_time_time;
int duration = msc->stts_data[index].duration;
int count = msc->stts_data[index].count;
if (sample + count < msc->current_sample) {
sample += count;
time += count*duration;
index ++;
duration = msc->stts_data[index].duration;
}
dts = time + (msc->current_sample-1 - sample) * (int64_t)duration;
dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale);
dprintf("stream: %d dts: %Ld best_dts: %Ld offset: %Ld \n", i, dts, best_dts, offset);
if(dts < best_dts){
best_dts= dts;
sc = msc;
offset = msc->chunk_offsets[msc->next_chunk];
}
}else{
if ((msc->chunk_offsets[msc->next_chunk] < offset)) {
sc = msc;
offset = msc->chunk_offsets[msc->next_chunk];
}
}
}
}
if (!sc || offset==INT64_MAX)
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;
}
if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
mov->next_chunk_offset = offset;
offset = INT64_MAX;
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
&& msc->chunk_offsets[msc->next_chunk] > offset)
size = msc->chunk_offsets[msc->next_chunk] - offset;
}
#ifdef MOV_MINOLTA_FIX
//Make sure that size is according to sample_size (Needed by .mov files
//created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
//Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
//but I have no such movies
if (sc->sample_size > 0) {
int foundsize=0;
for(i=0; i<(sc->sample_to_chunk_sz); i++) {
if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
{
// I can't figure out why for PCM audio sample_size is always 1
// (it should actually be channels*bits_per_second/8) but it is.
AVCodecContext* cod = s->streams[sc->ffindex]->codec;
if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
else
foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
}
dprintf("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);
}
if( (foundsize>0) && (foundsize<size) )
{
size=foundsize;
}
}
#endif //MOV_MINOLTA_FIX
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;
/* split chunks into samples */
if (sc->sample_size == 0 || sc->sample_size > 100) {
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_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
}
sc->current_sample++;
}else if(idx + 1 < sc->sample_to_chunk_sz){
sc->current_sample += sc->sample_to_chunk[idx].count;
}
readchunk:
dprintf("chunk: %lli -> %lli (%i)\n", 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);
av_get_packet(&s->pb, pkt, size);
pkt->stream_index = sc->ffindex;
// If the keyframes table exists, mark any samples that are in the table as key frames.
// If no table exists, treat very sample as a key frame.
if (sc->keyframes) {
a = 0;
b = sc->keyframe_count - 1;
while (a < b) {
m = (a + b + 1) >> 1;
if (sc->keyframes[m] > sc->current_sample) {
b = m - 1;
} else {
a = m;
}
}
if (sc->keyframes[a] == sc->current_sample)
pkt->flags |= PKT_FLAG_KEY;
}
else
pkt->flags |= PKT_FLAG_KEY;
mov->next_chunk_offset = offset + size;
/* find the corresponding dts */
if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {
unsigned int count;
uint64_t dts, pts;
unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;
count = sc->stts_data[sc->sample_to_time_index].count;
if ((sc->sample_to_time_sample + count) < sc->current_sample) {
sc->sample_to_time_sample += count;
sc->sample_to_time_time += count*duration;
sc->sample_to_time_index ++;
duration = sc->stts_data[sc->sample_to_time_index].duration;
}
dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
/* find the corresponding pts */
if (sc->sample_to_ctime_index < sc->ctts_count) {
int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
int count = sc->ctts_data[sc->sample_to_ctime_index].count;
if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
sc->sample_to_ctime_sample += count;
sc->sample_to_ctime_index ++;
duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
}
pts = dts + duration;
}else
pts = dts;
st= s->streams[ sc->ffindex ];
assert(pts % st->time_base.num == 0);
assert(dts % st->time_base.num == 0);
pkt->pts = pts / st->time_base.num;
pkt->dts = dts / st->time_base.num;
dprintf("stream #%d smp #%ld dts = %lld pts = %lld (smp:%ld time:%lld idx:%d ent:%d count:%d dur:%d)\n"
, pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
, sc->sample_to_time_sample
, sc->sample_to_time_time
, sc->sample_to_time_index
, sc->stts_count
, count
, duration);
}
return 0;
}
#if defined(MOV_SEEK)
/**
* Seek method based on the one described in the Appendix C of QTFileFormat.pdf
*/
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
{
MOVContext* mov = (MOVContext *) s->priv_data;
MOVStreamContext* sc;
int32_t i, a, b, m;
int64_t start_time;
int32_t seek_sample, sample;
int32_t duration;
int32_t count;
int32_t chunk;
int32_t left_in_chunk;
int64_t chunk_file_offset;
int64_t sample_file_offset;
int32_t first_chunk_sample;
int32_t sample_to_chunk_idx;
int sample_to_time_index;
long sample_to_time_sample = 0;
uint64_t sample_to_time_time = 0;
int mov_idx;
// Find the corresponding mov stream
for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
if (mov->streams[mov_idx]->ffindex == stream_index)
break;
if (mov_idx == mov->total_streams) {
av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
return -1;
}
sc = mov->streams[mov_idx];
sample_time *= s->streams[stream_index]->time_base.num;
// Step 1. Find the edit that contains the requested time (elst)
if (sc->edit_count && 0) {
// FIXME should handle edit list
av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
return -1;
}
// Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
dprintf("Searching for time %li in stream #%i (time_scale=%i)\n", (long)sample_time, mov_idx, sc->time_scale);
start_time = 0; // FIXME use elst atom
sample = 1; // sample are 0 based in table
for (i = 0; i < sc->stts_count; i++) {
count = sc->stts_data[i].count;
duration = sc->stts_data[i].duration;
if ((start_time + count*duration) > sample_time) {
sample_to_time_time = start_time;
sample_to_time_index = i;
sample_to_time_sample = sample;
sample += (sample_time - start_time) / duration;
break;
}
sample += count;
start_time += count * duration;
}
sample_to_time_time = start_time;
sample_to_time_index = i;
/* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
dprintf("Found time %li at sample #%u\n", (long)sample_time, sample);
if (sample > sc->sample_count) {
av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count);
return -1;
}
// Step 3. Find the prior sync. sample using the Sync sample atom (stss)
if (sc->keyframes) {
a = 0;
b = sc->keyframe_count - 1;
while (a < b) {
m = (a + b + 1) >> 1;
if (sc->keyframes[m] > sample) {
b = m - 1;
} else {
a = m;
}
}
// for low latency prob: always use the previous keyframe, just uncomment the next line
// if (a) a--;
seek_sample = sc->keyframes[a];
}
else
seek_sample = sample; // else all samples are key frames
dprintf("Found nearest keyframe at sample #%i \n", seek_sample);
// Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
break;
first_chunk_sample += b;
}
chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
sample_to_chunk_idx = i;
dprintf("Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx);
// Step 5. Find the offset of the chunk using the chunk offset atom
if (!sc->chunk_offsets) {
av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
return -1;
}
if (chunk > sc->chunk_count) {
av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count);
return -1;
}
chunk_file_offset = sc->chunk_offsets[chunk - 1];
dprintf("Chunk file offset is #%llu \n", chunk_file_offset);
// Step 6. Find the byte offset within the chunk using the sample size atom
sample_file_offset = chunk_file_offset;
if (sc->sample_size)
sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
else {
for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
}
}
dprintf("Sample file offset is #%llu \n", sample_file_offset);
// Step 6. Update the parser
mov->partial = sc;
mov->next_chunk_offset = sample_file_offset;
// Update current stream state
sc->current_sample = seek_sample - 1; // zero based
sc->left_in_chunk = left_in_chunk;
sc->next_chunk = chunk; // +1 -1 (zero based)
sc->sample_to_chunk_index = sample_to_chunk_idx;
// Update other streams
for (i = 0; i<mov->total_streams; i++) {
MOVStreamContext *msc;
if (i == mov_idx) continue;
// Find the nearest 'next' chunk
msc = mov->streams[i];
a = 0;
b = msc->chunk_count - 1;
while (a < b) {
m = (a + b + 1) >> 1;
if (msc->chunk_offsets[m] > chunk_file_offset) {
b = m - 1;
} else {
a = m;
}
}
msc->next_chunk = a;
if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
msc->next_chunk ++;
dprintf("Nearest next chunk for stream #%i is #%li @%lli\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]);
// Compute sample count and index in the sample_to_chunk table (what a pity)
msc->sample_to_chunk_index = 0;
msc->current_sample = 0;
for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
&& msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
* msc->sample_to_chunk[msc->sample_to_chunk_index].count;
}
msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * sc->sample_to_chunk[msc->sample_to_chunk_index].count;
msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
// Find corresponding position in stts (used later to compute dts)
sample = 0;
start_time = 0;
for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {
count = msc->stts_data[msc->sample_to_time_index].count;
duration = msc->stts_data[msc->sample_to_time_index].duration;
if ((sample + count - 1) > msc->current_sample) {
msc->sample_to_time_time = start_time;
msc->sample_to_time_sample = sample;
break;
}
sample += count;
start_time += count * duration;
}
sample = 0;
for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {
count = msc->ctts_data[msc->sample_to_ctime_index].count;
duration = msc->ctts_data[msc->sample_to_ctime_index].duration;
if ((sample + count - 1) > msc->current_sample) {
msc->sample_to_ctime_sample = sample;
break;
}
sample += count;
}
dprintf("Next Sample for stream #%i is #%li @%li\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1);
}
return 0;
}
#endif
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]);
/* free color tabs */
for(i=0; i<mov->ctab_size; i++)
av_freep(&mov->ctab[i]);
av_freep(&mov->ctab);
return 0;
}
static AVInputFormat mov_iformat = {
"mov,mp4,m4a,3gp,3g2",
"QuickTime/MPEG4 format",
sizeof(MOVContext),
mov_probe,
mov_read_header,
mov_read_packet,
mov_read_close,
#if defined(MOV_SEEK)
mov_read_seek,
#endif
};
int mov_init(void)
{
av_register_input_format(&mov_iformat);
return 0;
}