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47372caac5
FFmpeg/libavformat/mov.c
Jon Morley 47372caac5 libavformat/mov.c: Handle timecode from tmcd atom in counter mode 
When the timecode value is in counter mode then it is important to use
the timescale and frameduration to calculate the timecode fps.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-01-23 13:14:15 +01:00

4310 lines
144 KiB
C
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/*
* MOV demuxer
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* first version by Francois Revol <revol@free.fr>
* seek function by Gael Chardon <gael.dev@4now.net>
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <inttypes.h>
#include <limits.h>
#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "libavutil/mathematics.h"
#include "libavutil/time_internal.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/display.h"
#include "libavutil/opt.h"
#include "libavutil/timecode.h"
#include "libavcodec/ac3tab.h"
#include "avformat.h"
#include "internal.h"
#include "avio_internal.h"
#include "riff.h"
#include "isom.h"
#include "libavcodec/get_bits.h"
#include "id3v1.h"
#include "mov_chan.h"
#include "replaygain.h"
#if CONFIG_ZLIB
#include <zlib.h>
#endif
#include "qtpalette.h"
#undef NDEBUG
#include <assert.h>
/* those functions parse an atom */
/* links atom IDs to parse functions */
typedef struct MOVParseTableEntry {
uint32_t type;
int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
} MOVParseTableEntry;
static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
static int mov_read_mfra(MOVContext *c, AVIOContext *f);
static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
unsigned len, const char *key)
{
char buf[16];
short current, total = 0;
avio_rb16(pb); // unknown
current = avio_rb16(pb);
if (len >= 6)
total = avio_rb16(pb);
if (!total)
snprintf(buf, sizeof(buf), "%d", current);
else
snprintf(buf, sizeof(buf), "%d/%d", current, total);
c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
av_dict_set(&c->fc->metadata, key, buf, 0);
return 0;
}
static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
unsigned len, const char *key)
{
/* bypass padding bytes */
avio_r8(pb);
avio_r8(pb);
avio_r8(pb);
c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
return 0;
}
static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
unsigned len, const char *key)
{
c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
return 0;
}
static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
unsigned len, const char *key)
{
short genre;
avio_r8(pb); // unknown
genre = avio_r8(pb);
if (genre < 1 || genre > ID3v1_GENRE_MAX)
return 0;
c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
return 0;
}
static const uint32_t mac_to_unicode[128] = {
0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
};
static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
char *dst, int dstlen)
{
char *p = dst;
char *end = dst+dstlen-1;
int i;
for (i = 0; i < len; i++) {
uint8_t t, c = avio_r8(pb);
if (c < 0x80 && p < end)
*p++ = c;
else if (p < end)
PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
}
*p = 0;
return p - dst;
}
static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
{
AVPacket pkt;
AVStream *st;
MOVStreamContext *sc;
enum AVCodecID id;
int ret;
switch (type) {
case 0xd: id = AV_CODEC_ID_MJPEG; break;
case 0xe: id = AV_CODEC_ID_PNG; break;
case 0x1b: id = AV_CODEC_ID_BMP; break;
default:
av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
avio_skip(pb, len);
return 0;
}
st = avformat_new_stream(c->fc, NULL);
if (!st)
return AVERROR(ENOMEM);
sc = av_mallocz(sizeof(*sc));
if (!sc)
return AVERROR(ENOMEM);
st->priv_data = sc;
ret = av_get_packet(pb, &pkt, len);
if (ret < 0)
return ret;
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
st->attached_pic = pkt;
st->attached_pic.stream_index = st->index;
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = id;
return 0;
}
static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
{
char language[4] = { 0 };
char buf[100];
uint16_t langcode = 0;
double longitude, latitude;
const char *key = "location";
if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4)
return AVERROR_INVALIDDATA;
avio_skip(pb, 4); // version+flags
langcode = avio_rb16(pb);
ff_mov_lang_to_iso639(langcode, language);
len -= 6;
len -= avio_get_str(pb, len, buf, sizeof(buf)); // place name
if (len < 1)
return AVERROR_INVALIDDATA;
avio_skip(pb, 1); // role
len -= 1;
if (len < 14)
return AVERROR_INVALIDDATA;
longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
// Try to output in the same format as the ?xyz field
snprintf(buf, sizeof(buf), "%+08.4f%+09.4f/", latitude, longitude);
if (*language && strcmp(language, "und")) {
char key2[16];
snprintf(key2, sizeof(key2), "%s-%s", key, language);
av_dict_set(&c->fc->metadata, key2, buf, 0);
}
c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
return av_dict_set(&c->fc->metadata, key, buf, 0);
}
static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
char tmp_key[5];
char key2[32], language[4] = {0};
char *str = NULL;
const char *key = NULL;
uint16_t langcode = 0;
uint32_t data_type = 0, str_size, str_size_alloc;
int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
int raw = 0;
switch (atom.type) {
case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
case MKTAG( 'X','M','P','_'):
if (c->export_xmp) { key = "xmp"; raw = 1; } break;
case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
case MKTAG( 'a','k','I','D'): key = "account_type";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 'a','p','I','D'): key = "account_id"; break;
case MKTAG( 'c','a','t','g'): key = "category"; break;
case MKTAG( 'c','p','i','l'): key = "compilation";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 'c','p','r','t'): key = "copyright"; break;
case MKTAG( 'd','e','s','c'): key = "description"; break;
case MKTAG( 'd','i','s','k'): key = "disc";
parse = mov_metadata_track_or_disc_number; break;
case MKTAG( 'e','g','i','d'): key = "episode_uid";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 'g','n','r','e'): key = "genre";
parse = mov_metadata_gnre; break;
case MKTAG( 'h','d','v','d'): key = "hd_video";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 'k','e','y','w'): key = "keywords"; break;
case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
case MKTAG( 'l','o','c','i'):
return mov_metadata_loci(c, pb, atom.size);
case MKTAG( 'p','c','s','t'): key = "podcast";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 'p','g','a','p'): key = "gapless_playback";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
case MKTAG( 'r','t','n','g'): key = "rating";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
case MKTAG( 's','o','a','l'): key = "sort_album"; break;
case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
case MKTAG( 's','o','n','m'): key = "sort_name"; break;
case MKTAG( 's','o','s','n'): key = "sort_show"; break;
case MKTAG( 's','t','i','k'): key = "media_type";
parse = mov_metadata_int8_no_padding; break;
case MKTAG( 't','r','k','n'): key = "track";
parse = mov_metadata_track_or_disc_number; break;
case MKTAG( 't','v','e','n'): key = "episode_id"; break;
case MKTAG( 't','v','e','s'): key = "episode_sort";
parse = mov_metadata_int8_bypass_padding; break;
case MKTAG( 't','v','n','n'): key = "network"; break;
case MKTAG( 't','v','s','h'): key = "show"; break;
case MKTAG( 't','v','s','n'): key = "season_number";
parse = mov_metadata_int8_bypass_padding; break;
case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
case MKTAG(0xa9,'a','l','b'): key = "album"; break;
case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
case MKTAG(0xa9,'d','a','y'): key = "date"; break;
case MKTAG(0xa9,'d','i','r'): key = "director"; break;
case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
case MKTAG(0xa9,'m','a','k'): key = "make"; break;
case MKTAG(0xa9,'m','o','d'): key = "model"; break;
case MKTAG(0xa9,'n','a','m'): key = "title"; break;
case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
case MKTAG(0xa9,'t','r','k'): key = "track"; break;
case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
case MKTAG(0xa9,'x','y','z'): key = "location"; break;
}
if (c->itunes_metadata && atom.size > 8) {
int data_size = avio_rb32(pb);
int tag = avio_rl32(pb);
if (tag == MKTAG('d','a','t','a')) {
data_type = avio_rb32(pb); // type
avio_rb32(pb); // unknown
str_size = data_size - 16;
atom.size -= 16;
if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
int ret = mov_read_covr(c, pb, data_type, str_size);
if (ret < 0) {
av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
}
return ret;
}
} else return 0;
} else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
str_size = avio_rb16(pb); // string length
langcode = avio_rb16(pb);
ff_mov_lang_to_iso639(langcode, language);
atom.size -= 4;
} else
str_size = atom.size;
if (c->export_all && !key) {
snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
key = tmp_key;
}
if (!key)
return 0;
if (atom.size < 0 || str_size >= INT_MAX/2)
return AVERROR_INVALIDDATA;
// worst-case requirement for output string in case of utf8 coded input
str_size_alloc = (raw ? str_size : str_size * 2) + 1;
str = av_mallocz(str_size_alloc);
if (!str)
return AVERROR(ENOMEM);
if (parse)
parse(c, pb, str_size, key);
else {
if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
} else {
int ret = avio_read(pb, str, str_size);
if (ret != str_size) {
av_freep(&str);
return ret < 0 ? ret : AVERROR_INVALIDDATA;
}
str[str_size] = 0;
}
c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
av_dict_set(&c->fc->metadata, key, str, 0);
if (*language && strcmp(language, "und")) {
snprintf(key2, sizeof(key2), "%s-%s", key, language);
av_dict_set(&c->fc->metadata, key2, str, 0);
}
}
av_dlog(c->fc, "lang \"%3s\" ", language);
av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
key, str, (char*)&atom.type, str_size_alloc, atom.size);
av_freep(&str);
return 0;
}
static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int64_t start;
int i, nb_chapters, str_len, version;
char str[256+1];
if ((atom.size -= 5) < 0)
return 0;
version = avio_r8(pb);
avio_rb24(pb);
if (version)
avio_rb32(pb); // ???
nb_chapters = avio_r8(pb);
for (i = 0; i < nb_chapters; i++) {
if (atom.size < 9)
return 0;
start = avio_rb64(pb);
str_len = avio_r8(pb);
if ((atom.size -= 9+str_len) < 0)
return 0;
avio_read(pb, str, str_len);
str[str_len] = 0;
avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
}
return 0;
}
#define MIN_DATA_ENTRY_BOX_SIZE 12
static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
int entries, i, j;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_rb32(pb); // version + flags
entries = avio_rb32(pb);
if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
entries >= UINT_MAX / sizeof(*sc->drefs))
return AVERROR_INVALIDDATA;
av_free(sc->drefs);
sc->drefs_count = 0;
sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
if (!sc->drefs)
return AVERROR(ENOMEM);
sc->drefs_count = entries;
for (i = 0; i < sc->drefs_count; i++) {
MOVDref *dref = &sc->drefs[i];
uint32_t size = avio_rb32(pb);
int64_t next = avio_tell(pb) + size - 4;
if (size < 12)
return AVERROR_INVALIDDATA;
dref->type = avio_rl32(pb);
avio_rb32(pb); // version + flags
av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
if (dref->type == MKTAG('a','l','i','s') && size > 150) {
/* macintosh alias record */
uint16_t volume_len, len;
int16_t type;
avio_skip(pb, 10);
volume_len = avio_r8(pb);
volume_len = FFMIN(volume_len, 27);
avio_read(pb, dref->volume, 27);
dref->volume[volume_len] = 0;
av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
avio_skip(pb, 12);
len = avio_r8(pb);
len = FFMIN(len, 63);
avio_read(pb, dref->filename, 63);
dref->filename[len] = 0;
av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
avio_skip(pb, 16);
/* read next level up_from_alias/down_to_target */
dref->nlvl_from = avio_rb16(pb);
dref->nlvl_to = avio_rb16(pb);
av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
dref->nlvl_from, dref->nlvl_to);
avio_skip(pb, 16);
for (type = 0; type != -1 && avio_tell(pb) < next; ) {
if(avio_feof(pb))
return AVERROR_EOF;
type = avio_rb16(pb);
len = avio_rb16(pb);
av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
if (len&1)
len += 1;
if (type == 2) { // absolute path
av_free(dref->path);
dref->path = av_mallocz(len+1);
if (!dref->path)
return AVERROR(ENOMEM);
avio_read(pb, dref->path, len);
if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
len -= volume_len;
memmove(dref->path, dref->path+volume_len, len);
dref->path[len] = 0;
}
for (j = 0; j < len; j++)
if (dref->path[j] == ':')
dref->path[j] = '/';
av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
} else if (type == 0) { // directory name
av_free(dref->dir);
dref->dir = av_malloc(len+1);
if (!dref->dir)
return AVERROR(ENOMEM);
if (avio_read(pb, dref->dir, len) != len)
return AVERROR_INVALIDDATA;
dref->dir[len] = 0;
for (j = 0; j < len; j++)
if (dref->dir[j] == ':')
dref->dir[j] = '/';
av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
} else
avio_skip(pb, len);
}
}
avio_seek(pb, next, SEEK_SET);
}
return 0;
}
static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
uint32_t type;
uint32_t av_unused ctype;
int title_size;
char *title_str;
if (c->fc->nb_streams < 1) // meta before first trak
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
/* component type */
ctype = avio_rl32(pb);
type = avio_rl32(pb); /* component subtype */
av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
if (type == MKTAG('v','i','d','e'))
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
else if (type == MKTAG('s','o','u','n'))
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
else if (type == MKTAG('m','1','a',' '))
st->codec->codec_id = AV_CODEC_ID_MP2;
else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
avio_rb32(pb); /* component manufacture */
avio_rb32(pb); /* component flags */
avio_rb32(pb); /* component flags mask */
title_size = atom.size - 24;
if (title_size > 0) {
title_str = av_malloc(title_size + 1); /* Add null terminator */
if (!title_str)
return AVERROR(ENOMEM);
avio_read(pb, title_str, title_size);
title_str[title_size] = 0;
if (title_str[0])
av_dict_set(&st->metadata, "handler_name", title_str +
(!c->isom && title_str[0] == title_size - 1), 0);
av_freep(&title_str);
}
return 0;
}
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
{
AVStream *st;
int tag;
if (fc->nb_streams < 1)
return 0;
st = fc->streams[fc->nb_streams-1];
avio_rb32(pb); /* version + flags */
ff_mp4_read_descr(fc, pb, &tag);
if (tag == MP4ESDescrTag) {
ff_mp4_parse_es_descr(pb, NULL);
} else
avio_rb16(pb); /* ID */
ff_mp4_read_descr(fc, pb, &tag);
if (tag == MP4DecConfigDescrTag)
ff_mp4_read_dec_config_descr(fc, st, pb);
return 0;
}
static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return ff_mov_read_esds(c->fc, pb);
}
static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
int ac3info, acmod, lfeon, bsmod;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
ac3info = avio_rb24(pb);
bsmod = (ac3info >> 14) & 0x7;
acmod = (ac3info >> 11) & 0x7;
lfeon = (ac3info >> 10) & 0x1;
st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
if (lfeon)
st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
st->codec->audio_service_type = bsmod;
if (st->codec->channels > 1 && bsmod == 0x7)
st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
return 0;
}
static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
int eac3info, acmod, lfeon, bsmod;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
/* No need to parse fields for additional independent substreams and its
* associated dependent substreams since libavcodec's E-AC-3 decoder
* does not support them yet. */
avio_rb16(pb); /* data_rate and num_ind_sub */
eac3info = avio_rb24(pb);
bsmod = (eac3info >> 12) & 0x1f;
acmod = (eac3info >> 9) & 0x7;
lfeon = (eac3info >> 8) & 0x1;
st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
if (lfeon)
st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
st->codec->audio_service_type = bsmod;
if (st->codec->channels > 1 && bsmod == 0x7)
st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
return 0;
}
static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if (atom.size < 16)
return 0;
/* skip version and flags */
avio_skip(pb, 4);
ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
return 0;
}
static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
int ret;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if ((ret = ff_get_wav_header(pb, st->codec, atom.size, 0)) < 0)
av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
return ret;
}
static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
const int num = avio_rb32(pb);
const int den = avio_rb32(pb);
AVStream *st;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
(den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
av_log(c->fc, AV_LOG_WARNING,
"sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
num, den);
} else if (den != 0) {
st->sample_aspect_ratio.num = num;
st->sample_aspect_ratio.den = den;
}
return 0;
}
/* this atom contains actual media data */
static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
if (atom.size == 0) /* wrong one (MP4) */
return 0;
c->found_mdat=1;
return 0; /* now go for moov */
}
/* read major brand, minor version and compatible brands and store them as metadata */
static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
uint32_t minor_ver;
int comp_brand_size;
char* comp_brands_str;
uint8_t type[5] = {0};
avio_read(pb, type, 4);
if (strcmp(type, "qt "))
c->isom = 1;
av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
av_dict_set(&c->fc->metadata, "major_brand", type, 0);
minor_ver = avio_rb32(pb); /* minor version */
av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
comp_brand_size = atom.size - 8;
if (comp_brand_size < 0)
return AVERROR_INVALIDDATA;
comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
if (!comp_brands_str)
return AVERROR(ENOMEM);
avio_read(pb, comp_brands_str, comp_brand_size);
comp_brands_str[comp_brand_size] = 0;
av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
av_freep(&comp_brands_str);
return 0;
}
/* this atom should contain all header atoms */
static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret;
if (c->found_moov) {
av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
avio_skip(pb, atom.size);
return 0;
}
if ((ret = mov_read_default(c, pb, atom)) < 0)
return ret;
/* 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;
return 0; /* now go for mdat */
}
static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
c->has_looked_for_mfra = 1;
if (pb->seekable) {
int ret;
av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
"for a mfra\n");
if ((ret = mov_read_mfra(c, pb)) < 0) {
av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
"read the mfra (may be a live ismv)\n");
}
} else {
av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
"seekable, can not look for mfra\n");
}
}
c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
return mov_read_default(c, pb, atom);
}
static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
{
char buffer[32];
if (time) {
struct tm *ptm, tmbuf;
time_t timet;
if(time >= 2082844800)
time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
timet = time;
ptm = gmtime_r(&timet, &tmbuf);
if (!ptm) return;
if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
av_dict_set(metadata, "creation_time", buffer, 0);
}
}
static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
int version;
char language[4] = {0};
unsigned lang;
int64_t creation_time;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
if (sc->time_scale) {
av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
return AVERROR_INVALIDDATA;
}
version = avio_r8(pb);
if (version > 1) {
avpriv_request_sample(c->fc, "Version %d", version);
return AVERROR_PATCHWELCOME;
}
avio_rb24(pb); /* flags */
if (version == 1) {
creation_time = avio_rb64(pb);
avio_rb64(pb);
} else {
creation_time = avio_rb32(pb);
avio_rb32(pb); /* modification time */
}
mov_metadata_creation_time(&st->metadata, creation_time);
sc->time_scale = avio_rb32(pb);
st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
lang = avio_rb16(pb); /* language */
if (ff_mov_lang_to_iso639(lang, language))
av_dict_set(&st->metadata, "language", language, 0);
avio_rb16(pb); /* quality */
return 0;
}
static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int64_t creation_time;
int version = avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
if (version == 1) {
creation_time = avio_rb64(pb);
avio_rb64(pb);
} else {
creation_time = avio_rb32(pb);
avio_rb32(pb); /* modification time */
}
mov_metadata_creation_time(&c->fc->metadata, creation_time);
c->time_scale = avio_rb32(pb); /* time scale */
av_dlog(c->fc, "time scale = %i\n", c->time_scale);
c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
// set the AVCodecContext duration because the duration of individual tracks
// may be inaccurate
if (c->time_scale > 0 && !c->trex_data)
c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
avio_rb32(pb); /* preferred scale */
avio_rb16(pb); /* preferred volume */
avio_skip(pb, 10); /* reserved */
avio_skip(pb, 36); /* display matrix */
avio_rb32(pb); /* preview time */
avio_rb32(pb); /* preview duration */
avio_rb32(pb); /* poster time */
avio_rb32(pb); /* selection time */
avio_rb32(pb); /* selection duration */
avio_rb32(pb); /* current time */
avio_rb32(pb); /* next track ID */
return 0;
}
static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
int little_endian;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
little_endian = avio_rb16(pb) & 0xFF;
av_dlog(c->fc, "enda %d\n", little_endian);
if (little_endian == 1) {
switch (st->codec->codec_id) {
case AV_CODEC_ID_PCM_S24BE:
st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
break;
case AV_CODEC_ID_PCM_S32BE:
st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
break;
case AV_CODEC_ID_PCM_F32BE:
st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
break;
case AV_CODEC_ID_PCM_F64BE:
st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
break;
default:
break;
}
}
return 0;
}
static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
char color_parameter_type[5] = { 0 };
int color_primaries, color_trc, color_matrix;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams - 1];
avio_read(pb, color_parameter_type, 4);
if (strncmp(color_parameter_type, "nclx", 4) &&
strncmp(color_parameter_type, "nclc", 4)) {
av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
color_parameter_type);
return 0;
}
color_primaries = avio_rb16(pb);
color_trc = avio_rb16(pb);
color_matrix = avio_rb16(pb);
av_dlog(c->fc, "%s: pri %d trc %d matrix %d",
color_parameter_type, color_primaries, color_trc, color_matrix);
if (c->isom) {
uint8_t color_range = avio_r8(pb) >> 7;
av_dlog(c->fc, " full %"PRIu8"", color_range);
if (color_range)
st->codec->color_range = AVCOL_RANGE_JPEG;
else
st->codec->color_range = AVCOL_RANGE_MPEG;
/* 14496-12 references JPEG XR specs (rather than the more complete
* 23001-8) so some adjusting is required */
if (color_primaries >= AVCOL_PRI_FILM)
color_primaries = AVCOL_PRI_UNSPECIFIED;
if ((color_trc >= AVCOL_TRC_LINEAR &&
color_trc <= AVCOL_TRC_LOG_SQRT) ||
color_trc >= AVCOL_TRC_BT2020_10)
color_trc = AVCOL_TRC_UNSPECIFIED;
if (color_matrix >= AVCOL_SPC_BT2020_NCL)
color_matrix = AVCOL_SPC_UNSPECIFIED;
st->codec->color_primaries = color_primaries;
st->codec->color_trc = color_trc;
st->codec->colorspace = color_matrix;
} else {
/* color primaries, Table 4-4 */
switch (color_primaries) {
case 1: st->codec->color_primaries = AVCOL_PRI_BT709; break;
case 5: st->codec->color_primaries = AVCOL_PRI_SMPTE170M; break;
case 6: st->codec->color_primaries = AVCOL_PRI_SMPTE240M; break;
}
/* color transfer, Table 4-5 */
switch (color_trc) {
case 1: st->codec->color_trc = AVCOL_TRC_BT709; break;
case 7: st->codec->color_trc = AVCOL_TRC_SMPTE240M; break;
}
/* color matrix, Table 4-6 */
switch (color_matrix) {
case 1: st->codec->colorspace = AVCOL_SPC_BT709; break;
case 6: st->codec->colorspace = AVCOL_SPC_BT470BG; break;
case 7: st->codec->colorspace = AVCOL_SPC_SMPTE240M; break;
}
}
av_dlog(c->fc, "\n");
return 0;
}
static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
unsigned mov_field_order;
enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
if (c->fc->nb_streams < 1) // will happen with jp2 files
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if (atom.size < 2)
return AVERROR_INVALIDDATA;
mov_field_order = avio_rb16(pb);
if ((mov_field_order & 0xFF00) == 0x0100)
decoded_field_order = AV_FIELD_PROGRESSIVE;
else if ((mov_field_order & 0xFF00) == 0x0200) {
switch (mov_field_order & 0xFF) {
case 0x01: decoded_field_order = AV_FIELD_TT;
break;
case 0x06: decoded_field_order = AV_FIELD_BB;
break;
case 0x09: decoded_field_order = AV_FIELD_TB;
break;
case 0x0E: decoded_field_order = AV_FIELD_BT;
break;
}
}
if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
}
st->codec->field_order = decoded_field_order;
return 0;
}
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
enum AVCodecID codec_id)
{
AVStream *st;
uint64_t size;
uint8_t *buf;
int err;
if (c->fc->nb_streams < 1) // will happen with jp2 files
return 0;
st= c->fc->streams[c->fc->nb_streams-1];
if (st->codec->codec_id != codec_id)
return 0; /* unexpected codec_id - don't mess with extradata */
size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
return AVERROR_INVALIDDATA;
if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
st->codec->extradata_size = 0;
return err;
}
buf = st->codec->extradata + st->codec->extradata_size;
st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
AV_WB32( buf , atom.size + 8);
AV_WL32( buf + 4, atom.type);
err = avio_read(pb, buf + 8, atom.size);
if (err < 0) {
return err;
} else if (err < atom.size) {
av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
st->codec->extradata_size -= atom.size - err;
}
memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return 0;
}
/* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
}
static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
}
static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
}
static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
}
static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
if(ret == 0)
ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
return ret;
}
static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
if (!ret && c->fc->nb_streams >= 1) {
AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
if (avctx->extradata_size >= 40) {
avctx->height = AV_RB16(&avctx->extradata[36]);
avctx->width = AV_RB16(&avctx->extradata[38]);
}
}
return ret;
}
static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
if (c->fc->nb_streams >= 1) {
AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
codec->codec_id == AV_CODEC_ID_H264 &&
atom.size > 11) {
avio_skip(pb, 10);
/* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
if (avio_rb16(pb) == 0xd4d)
codec->width = 1440;
return 0;
}
}
return mov_read_avid(c, pb, atom);
}
static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
}
static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if ((uint64_t)atom.size > (1<<30))
return AVERROR_INVALIDDATA;
if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
st->codec->codec_id == AV_CODEC_ID_QDMC ||
st->codec->codec_id == AV_CODEC_ID_SPEEX) {
// pass all frma atom to codec, needed at least for QDMC and QDM2
av_freep(&st->codec->extradata);
if (ff_get_extradata(st->codec, pb, atom.size) < 0)
return AVERROR(ENOMEM);
} else if (atom.size > 8) { /* to read frma, esds atoms */
int ret;
if ((ret = mov_read_default(c, pb, atom)) < 0)
return ret;
} else
avio_skip(pb, atom.size);
return 0;
}
/**
* This function reads atom content and puts data in extradata without tag
* nor size unlike mov_read_extradata.
*/
static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if ((uint64_t)atom.size > (1<<30))
return AVERROR_INVALIDDATA;
if (atom.size >= 10) {
// Broken files created by legacy versions of libavformat will
// wrap a whole fiel atom inside of a glbl atom.
unsigned size = avio_rb32(pb);
unsigned type = avio_rl32(pb);
avio_seek(pb, -8, SEEK_CUR);
if (type == MKTAG('f','i','e','l') && size == atom.size)
return mov_read_default(c, pb, atom);
}
if (st->codec->extradata_size > 1 && st->codec->extradata) {
av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
return 0;
}
av_freep(&st->codec->extradata);
if (ff_get_extradata(st->codec, pb, atom.size) < 0)
return AVERROR(ENOMEM);
return 0;
}
static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
uint8_t profile_level;
int ret;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if (atom.size >= (1<<28) || atom.size < 7)
return AVERROR_INVALIDDATA;
profile_level = avio_r8(pb);
if ((profile_level & 0xf0) != 0xc0)
return 0;
avio_seek(pb, 6, SEEK_CUR);
av_freep(&st->codec->extradata);
if ((ret = ff_get_extradata(st->codec, pb, atom.size - 7)) < 0)
return ret;
return 0;
}
/**
* An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
* but can have extradata appended at the end after the 40 bytes belonging
* to the struct.
*/
static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
if (c->fc->nb_streams < 1)
return 0;
if (atom.size <= 40)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
if ((uint64_t)atom.size > (1<<30))
return AVERROR_INVALIDDATA;
avio_skip(pb, 40);
av_freep(&st->codec->extradata);
if (ff_get_extradata(st->codec, pb, atom.size - 40) < 0)
return AVERROR(ENOMEM);
return 0;
}
static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);
if (!entries)
return 0;
if (sc->chunk_offsets)
av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
av_free(sc->chunk_offsets);
sc->chunk_count = 0;
sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
if (!sc->chunk_offsets)
return AVERROR(ENOMEM);
sc->chunk_count = entries;
if (atom.type == MKTAG('s','t','c','o'))
for (i = 0; i < entries && !pb->eof_reached; i++)
sc->chunk_offsets[i] = avio_rb32(pb);
else if (atom.type == MKTAG('c','o','6','4'))
for (i = 0; i < entries && !pb->eof_reached; i++)
sc->chunk_offsets[i] = avio_rb64(pb);
else
return AVERROR_INVALIDDATA;
sc->chunk_count = i;
if (pb->eof_reached)
return AVERROR_EOF;
return 0;
}
/**
* Compute codec id for 'lpcm' tag.
* See CoreAudioTypes and AudioStreamBasicDescription at Apple.
*/
enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
{
/* lpcm flags:
* 0x1 = float
* 0x2 = big-endian
* 0x4 = signed
*/
return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
}
static int mov_codec_id(AVStream *st, uint32_t format)
{
int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
if (id <= 0 &&
((format & 0xFFFF) == 'm' + ('s' << 8) ||
(format & 0xFFFF) == 'T' + ('S' << 8)))
id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
} else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
/* skip old asf mpeg4 tag */
format && format != MKTAG('m','p','4','s')) {
id = ff_codec_get_id(ff_codec_movvideo_tags, format);
if (id <= 0)
id = ff_codec_get_id(ff_codec_bmp_tags, format);
if (id > 0)
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
(st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
st->codec->codec_id == AV_CODEC_ID_NONE)) {
id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
if (id > 0)
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
}
}
st->codec->codec_tag = format;
return id;
}
static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
AVStream *st, MOVStreamContext *sc)
{
uint8_t codec_name[32];
unsigned int color_depth, len, j;
int color_greyscale;
int color_table_id;
avio_rb16(pb); /* version */
avio_rb16(pb); /* revision level */
avio_rb32(pb); /* vendor */
avio_rb32(pb); /* temporal quality */
avio_rb32(pb); /* spatial quality */
st->codec->width = avio_rb16(pb); /* width */
st->codec->height = avio_rb16(pb); /* height */
avio_rb32(pb); /* horiz resolution */
avio_rb32(pb); /* vert resolution */
avio_rb32(pb); /* data size, always 0 */
avio_rb16(pb); /* frames per samples */
len = avio_r8(pb); /* codec name, pascal string */
if (len > 31)
len = 31;
mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
if (len < 31)
avio_skip(pb, 31 - len);
if (codec_name[0])
av_dict_set(&st->metadata, "encoder", codec_name, 0);
/* codec_tag YV12 triggers an UV swap in rawdec.c */
if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
st->codec->codec_tag = MKTAG('I', '4', '2', '0');
st->codec->width &= ~1;
st->codec->height &= ~1;
}
/* Flash Media Server uses tag H263 with Sorenson Spark */
if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
!memcmp(codec_name, "Sorenson H263", 13))
st->codec->codec_id = AV_CODEC_ID_FLV1;
st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
color_table_id = avio_rb16(pb); /* colortable id */
av_dlog(c->fc, "depth %d, ctab id %d\n",
st->codec->bits_per_coded_sample, color_table_id);
/* figure out the palette situation */
color_depth = st->codec->bits_per_coded_sample & 0x1F;
color_greyscale = st->codec->bits_per_coded_sample & 0x20;
/* Do not create a greyscale palette for cinepak */
if (color_greyscale && st->codec->codec_id == AV_CODEC_ID_CINEPAK)
return;
/* if the depth is 2, 4, or 8 bpp, file is palettized */
if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
/* for palette traversal */
unsigned int color_start, color_count, color_end;
unsigned char a, r, g, b;
if (color_greyscale) {
int color_index, color_dec;
/* compute the greyscale palette */
st->codec->bits_per_coded_sample = color_depth;
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;
sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
color_index -= color_dec;
if (color_index < 0)
color_index = 0;
}
} else if (color_table_id) {
const uint8_t *color_table;
/* 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 * 3 + 0];
g = color_table[j * 3 + 1];
b = color_table[j * 3 + 2];
sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
}
} else {
/* load the palette from the file */
color_start = avio_rb32(pb);
color_count = avio_rb16(pb);
color_end = avio_rb16(pb);
if ((color_start <= 255) && (color_end <= 255)) {
for (j = color_start; j <= color_end; j++) {
/* each A, R, G, or B component is 16 bits;
* only use the top 8 bits */
a = avio_r8(pb);
avio_r8(pb);
r = avio_r8(pb);
avio_r8(pb);
g = avio_r8(pb);
avio_r8(pb);
b = avio_r8(pb);
avio_r8(pb);
sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
}
}
}
sc->has_palette = 1;
}
}
static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
AVStream *st, MOVStreamContext *sc)
{
int bits_per_sample, flags;
uint16_t version = avio_rb16(pb);
AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
avio_rb16(pb); /* revision level */
avio_rb32(pb); /* vendor */
st->codec->channels = avio_rb16(pb); /* channel count */
st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
sc->audio_cid = avio_rb16(pb);
avio_rb16(pb); /* packet size = 0 */
st->codec->sample_rate = ((avio_rb32(pb) >> 16));
// Read QT version 1 fields. In version 0 these do not exist.
av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
if (!c->isom ||
(compatible_brands && strstr(compatible_brands->value, "qt "))) {
if (version == 1) {
sc->samples_per_frame = avio_rb32(pb);
avio_rb32(pb); /* bytes per packet */
sc->bytes_per_frame = avio_rb32(pb);
avio_rb32(pb); /* bytes per sample */
} else if (version == 2) {
avio_rb32(pb); /* sizeof struct only */
st->codec->sample_rate = av_int2double(avio_rb64(pb));
st->codec->channels = avio_rb32(pb);
avio_rb32(pb); /* always 0x7F000000 */
st->codec->bits_per_coded_sample = avio_rb32(pb);
flags = avio_rb32(pb); /* lpcm format specific flag */
sc->bytes_per_frame = avio_rb32(pb);
sc->samples_per_frame = avio_rb32(pb);
if (st->codec->codec_tag == MKTAG('l','p','c','m'))
st->codec->codec_id =
ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
flags);
}
}
switch (st->codec->codec_id) {
case AV_CODEC_ID_PCM_S8:
case AV_CODEC_ID_PCM_U8:
if (st->codec->bits_per_coded_sample == 16)
st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
break;
case AV_CODEC_ID_PCM_S16LE:
case AV_CODEC_ID_PCM_S16BE:
if (st->codec->bits_per_coded_sample == 8)
st->codec->codec_id = AV_CODEC_ID_PCM_S8;
else if (st->codec->bits_per_coded_sample == 24)
st->codec->codec_id =
st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
else if (st->codec->bits_per_coded_sample == 32)
st->codec->codec_id =
st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
break;
/* set values for old format before stsd version 1 appeared */
case AV_CODEC_ID_MACE3:
sc->samples_per_frame = 6;
sc->bytes_per_frame = 2 * st->codec->channels;
break;
case AV_CODEC_ID_MACE6:
sc->samples_per_frame = 6;
sc->bytes_per_frame = 1 * st->codec->channels;
break;
case AV_CODEC_ID_ADPCM_IMA_QT:
sc->samples_per_frame = 64;
sc->bytes_per_frame = 34 * st->codec->channels;
break;
case AV_CODEC_ID_GSM:
sc->samples_per_frame = 160;
sc->bytes_per_frame = 33;
break;
default:
break;
}
bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
if (bits_per_sample) {
st->codec->bits_per_coded_sample = bits_per_sample;
sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
}
}
static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
AVStream *st, MOVStreamContext *sc,
int64_t size)
{
// ttxt stsd contains display flags, justification, background
// color, fonts, and default styles, so fake an atom to read it
MOVAtom fake_atom = { .size = size };
// mp4s contains a regular esds atom
if (st->codec->codec_tag != AV_RL32("mp4s"))
mov_read_glbl(c, pb, fake_atom);
st->codec->width = sc->width;
st->codec->height = sc->height;
}
static uint32_t yuv_to_rgba(uint32_t ycbcr)
{
uint8_t r, g, b;
int y, cb, cr;
y = (ycbcr >> 16) & 0xFF;
cr = (ycbcr >> 8) & 0xFF;
cb = ycbcr & 0xFF;
b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
return (r << 16) | (g << 8) | b;
}
static int mov_rewrite_dvd_sub_extradata(AVStream *st)
{
char buf[256] = {0};
uint8_t *src = st->codec->extradata;
int i;
if (st->codec->extradata_size != 64)
return 0;
if (st->codec->width > 0 && st->codec->height > 0)
snprintf(buf, sizeof(buf), "size: %dx%d\n",
st->codec->width, st->codec->height);
av_strlcat(buf, "palette: ", sizeof(buf));
for (i = 0; i < 16; i++) {
uint32_t yuv = AV_RB32(src + i * 4);
uint32_t rgba = yuv_to_rgba(yuv);
av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
}
if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
return 0;
av_freep(&st->codec->extradata);
st->codec->extradata_size = 0;
st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata_size = strlen(buf);
memcpy(st->codec->extradata, buf, st->codec->extradata_size);
return 0;
}
static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
AVStream *st, MOVStreamContext *sc,
int64_t size)
{
if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
if ((int)size != size || ff_get_extradata(st->codec, pb, size) < 0)
return AVERROR(ENOMEM);
if (size > 16) {
MOVStreamContext *tmcd_ctx = st->priv_data;
int val;
val = AV_RB32(st->codec->extradata + 4);
tmcd_ctx->tmcd_flags = val;
if (val & 1)
st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
st->codec->time_base.num = 1;
/* adjust for per frame dur in counter mode */
if (tmcd_ctx->tmcd_flags & 0x0008) {
int timescale = AV_RB32(st->codec->extradata + 8);
int framedur = AV_RB32(st->codec->extradata + 12);
st->codec->time_base.den *= timescale;
st->codec->time_base.num *= framedur;
}
if (size > 30) {
uint32_t len = AV_RB32(st->codec->extradata + 18); /* name atom length */
uint32_t format = AV_RB32(st->codec->extradata + 22);
if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
uint16_t str_size = AV_RB16(st->codec->extradata + 26); /* string length */
if (str_size > 0 && size >= (int)str_size + 26) {
char *reel_name = av_malloc(str_size + 1);
if (!reel_name)
return AVERROR(ENOMEM);
memcpy(reel_name, st->codec->extradata + 30, str_size);
reel_name[str_size] = 0; /* Add null terminator */
/* don't add reel_name if emtpy string */
if (*reel_name == 0) {
av_free(reel_name);
} else {
av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
}
}
}
}
}
} else {
/* other codec type, just skip (rtp, mp4s ...) */
avio_skip(pb, size);
}
return 0;
}
static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
AVStream *st, MOVStreamContext *sc)
{
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
!st->codec->sample_rate && sc->time_scale > 1)
st->codec->sample_rate = sc->time_scale;
/* special codec parameters handling */
switch (st->codec->codec_id) {
#if CONFIG_DV_DEMUXER
case AV_CODEC_ID_DVAUDIO:
c->dv_fctx = avformat_alloc_context();
c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
if (!c->dv_demux) {
av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
return AVERROR(ENOMEM);
}
sc->dv_audio_container = 1;
st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
break;
#endif
/* no ifdef since parameters are always those */
case AV_CODEC_ID_QCELP:
st->codec->channels = 1;
// force sample rate for qcelp when not stored in mov
if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
st->codec->sample_rate = 8000;
// FIXME: Why is the following needed for some files?
sc->samples_per_frame = 160;
if (!sc->bytes_per_frame)
sc->bytes_per_frame = 35;
break;
case AV_CODEC_ID_AMR_NB:
st->codec->channels = 1;
/* force sample rate for amr, stsd in 3gp does not store sample rate */
st->codec->sample_rate = 8000;
break;
case AV_CODEC_ID_AMR_WB:
st->codec->channels = 1;
st->codec->sample_rate = 16000;
break;
case AV_CODEC_ID_MP2:
case AV_CODEC_ID_MP3:
/* force type after stsd for m1a hdlr */
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->need_parsing = AVSTREAM_PARSE_FULL;
break;
case AV_CODEC_ID_GSM:
case AV_CODEC_ID_ADPCM_MS:
case AV_CODEC_ID_ADPCM_IMA_WAV:
case AV_CODEC_ID_ILBC:
case AV_CODEC_ID_MACE3:
case AV_CODEC_ID_MACE6:
case AV_CODEC_ID_QDM2:
st->codec->block_align = sc->bytes_per_frame;
break;
case AV_CODEC_ID_ALAC:
if (st->codec->extradata_size == 36) {
st->codec->channels = AV_RB8 (st->codec->extradata + 21);
st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
}
break;
case AV_CODEC_ID_AC3:
case AV_CODEC_ID_EAC3:
case AV_CODEC_ID_MPEG1VIDEO:
case AV_CODEC_ID_VC1:
st->need_parsing = AVSTREAM_PARSE_FULL;
break;
default:
break;
}
return 0;
}
static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
int codec_tag, int format,
int64_t size)
{
int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
if (codec_tag &&
(codec_tag != format &&
(c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
: codec_tag != MKTAG('j','p','e','g')))) {
/* Multiple fourcc, we skip JPEG. This is not correct, we should
* export it as a separate AVStream but this needs a few changes
* in the MOV demuxer, patch welcome. */
av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
avio_skip(pb, size);
return 1;
}
if ( codec_tag == AV_RL32("avc1") ||
codec_tag == AV_RL32("hvc1") ||
codec_tag == AV_RL32("hev1")
)
av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
return 0;
}
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
{
AVStream *st;
MOVStreamContext *sc;
int pseudo_stream_id;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
for (pseudo_stream_id = 0;
pseudo_stream_id < entries && !pb->eof_reached;
pseudo_stream_id++) {
//Parsing Sample description table
enum AVCodecID id;
int ret, dref_id = 1;
MOVAtom a = { AV_RL32("stsd") };
int64_t start_pos = avio_tell(pb);
int64_t size = avio_rb32(pb); /* size */
uint32_t format = avio_rl32(pb); /* data format */
if (size >= 16) {
avio_rb32(pb); /* reserved */
avio_rb16(pb); /* reserved */
dref_id = avio_rb16(pb);
}else if (size <= 7){
av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
return AVERROR_INVALIDDATA;
}
if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
size - (avio_tell(pb) - start_pos)))
continue;
sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
sc->dref_id= dref_id;
id = mov_codec_id(st, format);
av_dlog(c->fc, "size=%"PRId64" 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);
if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
st->codec->codec_id = id;
mov_parse_stsd_video(c, pb, st, sc);
} else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
st->codec->codec_id = id;
mov_parse_stsd_audio(c, pb, st, sc);
} else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
st->codec->codec_id = id;
mov_parse_stsd_subtitle(c, pb, st, sc,
size - (avio_tell(pb) - start_pos));
} else {
ret = mov_parse_stsd_data(c, pb, st, sc,
size - (avio_tell(pb) - start_pos));
if (ret < 0)
return ret;
}
/* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
a.size = size - (avio_tell(pb) - start_pos);
if (a.size > 8) {
if ((ret = mov_read_default(c, pb, a)) < 0)
return ret;
} else if (a.size > 0)
avio_skip(pb, a.size);
}
if (pb->eof_reached)
return AVERROR_EOF;
return mov_finalize_stsd_codec(c, pb, st, sc);
}
static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int entries;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);
return ff_mov_read_stsd_entries(c, pb, entries);
}
static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);
av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
if (!entries)
return 0;
if (sc->stsc_data)
av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
av_free(sc->stsc_data);
sc->stsc_count = 0;
sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
if (!sc->stsc_data)
return AVERROR(ENOMEM);
for (i = 0; i < entries && !pb->eof_reached; i++) {
sc->stsc_data[i].first = avio_rb32(pb);
sc->stsc_data[i].count = avio_rb32(pb);
sc->stsc_data[i].id = avio_rb32(pb);
}
sc->stsc_count = i;
if (pb->eof_reached)
return AVERROR_EOF;
return 0;
}
static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned i, entries;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_rb32(pb); // version + flags
entries = avio_rb32(pb);
if (sc->stps_data)
av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
av_free(sc->stps_data);
sc->stps_count = 0;
sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
if (!sc->stps_data)
return AVERROR(ENOMEM);
for (i = 0; i < entries && !pb->eof_reached; i++) {
sc->stps_data[i] = avio_rb32(pb);
//av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
}
sc->stps_count = i;
if (pb->eof_reached)
return AVERROR_EOF;
return 0;
}
static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);
av_dlog(c->fc, "keyframe_count = %d\n", entries);
if (!entries)
{
sc->keyframe_absent = 1;
if (!st->need_parsing && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
st->need_parsing = AVSTREAM_PARSE_HEADERS;
return 0;
}
if (sc->keyframes)
av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
if (entries >= UINT_MAX / sizeof(int))
return AVERROR_INVALIDDATA;
av_freep(&sc->keyframes);
sc->keyframe_count = 0;
sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
if (!sc->keyframes)
return AVERROR(ENOMEM);
for (i = 0; i < entries && !pb->eof_reached; i++) {
sc->keyframes[i] = avio_rb32(pb);
//av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
}
sc->keyframe_count = i;
if (pb->eof_reached)
return AVERROR_EOF;
return 0;
}
static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries, sample_size, field_size, num_bytes;
GetBitContext gb;
unsigned char* buf;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
if (atom.type == MKTAG('s','t','s','z')) {
sample_size = avio_rb32(pb);
if (!sc->sample_size) /* do not overwrite value computed in stsd */
sc->sample_size = sample_size;
sc->stsz_sample_size = sample_size;
field_size = 32;
} else {
sample_size = 0;
avio_rb24(pb); /* reserved */
field_size = avio_r8(pb);
}
entries = avio_rb32(pb);
av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
sc->sample_count = entries;
if (sample_size)
return 0;
if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
return AVERROR_INVALIDDATA;
}
if (!entries)
return 0;
if (entries >= (UINT_MAX - 4) / field_size)
return AVERROR_INVALIDDATA;
if (sc->sample_sizes)
av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
av_free(sc->sample_sizes);
sc->sample_count = 0;
sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
if (!sc->sample_sizes)
return AVERROR(ENOMEM);
num_bytes = (entries*field_size+4)>>3;
buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
if (!buf) {
av_freep(&sc->sample_sizes);
return AVERROR(ENOMEM);
}
if (avio_read(pb, buf, num_bytes) < num_bytes) {
av_freep(&sc->sample_sizes);
av_free(buf);
return AVERROR_INVALIDDATA;
}
init_get_bits(&gb, buf, 8*num_bytes);
for (i = 0; i < entries && !pb->eof_reached; i++) {
sc->sample_sizes[i] = get_bits_long(&gb, field_size);
sc->data_size += sc->sample_sizes[i];
}
sc->sample_count = i;
if (pb->eof_reached)
return AVERROR_EOF;
av_free(buf);
return 0;
}
static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries;
int64_t duration=0;
int64_t total_sample_count=0;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);
av_dlog(c->fc, "track[%i].stts.entries = %i\n",
c->fc->nb_streams-1, entries);
if (sc->stts_data)
av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
av_free(sc->stts_data);
sc->stts_count = 0;
sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
if (!sc->stts_data)
return AVERROR(ENOMEM);
for (i = 0; i < entries && !pb->eof_reached; i++) {
int sample_duration;
int sample_count;
sample_count=avio_rb32(pb);
sample_duration = avio_rb32(pb);
/* sample_duration < 0 is invalid based on the spec */
if (sample_duration < 0) {
av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta %d in STTS, at %d st:%d\n",
sample_duration, i, c->fc->nb_streams-1);
sample_duration = 1;
}
if (sample_count < 0) {
av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
return AVERROR_INVALIDDATA;
}
sc->stts_data[i].count= sample_count;
sc->stts_data[i].duration= sample_duration;
av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
sample_count, sample_duration);
if ( i+1 == entries
&& i
&& sample_count == 1
&& total_sample_count > 100
&& sample_duration/10 > duration / total_sample_count)
sample_duration = duration / total_sample_count;
duration+=(int64_t)sample_duration*sample_count;
total_sample_count+=sample_count;
}
sc->stts_count = i;
sc->duration_for_fps += duration;
sc->nb_frames_for_fps += total_sample_count;
if (pb->eof_reached)
return AVERROR_EOF;
st->nb_frames= total_sample_count;
if (duration)
st->duration= duration;
sc->track_end = duration;
return 0;
}
static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
{
if (duration < 0) {
sc->dts_shift = FFMAX(sc->dts_shift, -duration);
}
}
static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);
av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
if (!entries)
return 0;
if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
return AVERROR_INVALIDDATA;
sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
if (!sc->ctts_data)
return AVERROR(ENOMEM);
for (i = 0; i < entries && !pb->eof_reached; i++) {
int count =avio_rb32(pb);
int duration =avio_rb32(pb);
sc->ctts_data[i].count = count;
sc->ctts_data[i].duration= duration;
av_dlog(c->fc, "count=%d, duration=%d\n",
count, duration);
if (FFABS(duration) > (1<<28) && i+2<entries) {
av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
av_freep(&sc->ctts_data);
sc->ctts_count = 0;
return 0;
}
if (i+2<entries)
mov_update_dts_shift(sc, duration);
}
sc->ctts_count = i;
if (pb->eof_reached)
return AVERROR_EOF;
av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
return 0;
}
static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
unsigned int i, entries;
uint8_t version;
uint32_t grouping_type;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
version = avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
grouping_type = avio_rl32(pb);
if (grouping_type != MKTAG( 'r','a','p',' '))
return 0; /* only support 'rap ' grouping */
if (version == 1)
avio_rb32(pb); /* grouping_type_parameter */
entries = avio_rb32(pb);
if (!entries)
return 0;
if (sc->rap_group)
av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
av_free(sc->rap_group);
sc->rap_group_count = 0;
sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
if (!sc->rap_group)
return AVERROR(ENOMEM);
for (i = 0; i < entries && !pb->eof_reached; i++) {
sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
}
sc->rap_group_count = i;
return pb->eof_reached ? AVERROR_EOF : 0;
}
static void mov_build_index(MOVContext *mov, AVStream *st)
{
MOVStreamContext *sc = st->priv_data;
int64_t current_offset;
int64_t current_dts = 0;
unsigned int stts_index = 0;
unsigned int stsc_index = 0;
unsigned int stss_index = 0;
unsigned int stps_index = 0;
unsigned int i, j;
uint64_t stream_size = 0;
if (sc->elst_count) {
int i, edit_start_index = 0, unsupported = 0;
int64_t empty_duration = 0; // empty duration of the first edit list entry
int64_t start_time = 0; // start time of the media
for (i = 0; i < sc->elst_count; i++) {
const MOVElst *e = &sc->elst_data[i];
if (i == 0 && e->time == -1) {
/* if empty, the first entry is the start time of the stream
* relative to the presentation itself */
empty_duration = e->duration;
edit_start_index = 1;
} else if (i == edit_start_index && e->time >= 0) {
start_time = e->time;
} else
unsupported = 1;
}
if (unsupported)
av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
"a/v desync might occur, patch welcome\n");
/* adjust first dts according to edit list */
if ((empty_duration || start_time) && mov->time_scale > 0) {
if (empty_duration)
empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
sc->time_offset = start_time - empty_duration;
current_dts = -sc->time_offset;
if (sc->ctts_count>0 && sc->stts_count>0 &&
sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
/* more than 16 frames delay, dts are likely wrong
this happens with files created by iMovie */
sc->wrong_dts = 1;
st->codec->has_b_frames = 1;
}
}
}
/* only use old uncompressed audio chunk demuxing when stts specifies it */
if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
unsigned int current_sample = 0;
unsigned int stts_sample = 0;
unsigned int sample_size;
unsigned int distance = 0;
unsigned int rap_group_index = 0;
unsigned int rap_group_sample = 0;
int rap_group_present = sc->rap_group_count && sc->rap_group;
int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
current_dts -= sc->dts_shift;
if (!sc->sample_count || st->nb_index_entries)
return;
if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
return;
if (av_reallocp_array(&st->index_entries,
st->nb_index_entries + sc->sample_count,
sizeof(*st->index_entries)) < 0) {
st->nb_index_entries = 0;
return;
}
st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
for (i = 0; i < sc->chunk_count; i++) {
int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
current_offset = sc->chunk_offsets[i];
while (stsc_index + 1 < sc->stsc_count &&
i + 1 == sc->stsc_data[stsc_index + 1].first)
stsc_index++;
if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
sc->stsz_sample_size = sc->sample_size;
}
if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
sc->stsz_sample_size = sc->sample_size;
}
for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
int keyframe = 0;
if (current_sample >= sc->sample_count) {
av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
return;
}
if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
keyframe = 1;
if (stss_index + 1 < sc->keyframe_count)
stss_index++;
} else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
keyframe = 1;
if (stps_index + 1 < sc->stps_count)
stps_index++;
}
if (rap_group_present && rap_group_index < sc->rap_group_count) {
if (sc->rap_group[rap_group_index].index > 0)
keyframe = 1;
if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
rap_group_sample = 0;
rap_group_index++;
}
}
if (sc->keyframe_absent
&& !sc->stps_count
&& !rap_group_present
&& (st->codec->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
keyframe = 1;
if (keyframe)
distance = 0;
sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
if (sc->pseudo_stream_id == -1 ||
sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
e->pos = current_offset;
e->timestamp = current_dts;
e->size = sample_size;
e->min_distance = distance;
e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
"size %d, distance %d, keyframe %d\n", st->index, current_sample,
current_offset, current_dts, sample_size, distance, keyframe);
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
ff_rfps_add_frame(mov->fc, st, current_dts);
}
current_offset += sample_size;
stream_size += sample_size;
current_dts += sc->stts_data[stts_index].duration;
distance++;
stts_sample++;
current_sample++;
if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
stts_sample = 0;
stts_index++;
}
}
}
if (st->duration > 0)
st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
} else {
unsigned chunk_samples, total = 0;
// compute total chunk count
for (i = 0; i < sc->stsc_count; i++) {
unsigned count, chunk_count;
chunk_samples = sc->stsc_data[i].count;
if (i != sc->stsc_count - 1 &&
sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
return;
}
if (sc->samples_per_frame >= 160) { // gsm
count = chunk_samples / sc->samples_per_frame;
} else if (sc->samples_per_frame > 1) {
unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
count = (chunk_samples+samples-1) / samples;
} else {
count = (chunk_samples+1023) / 1024;
}
if (i < sc->stsc_count - 1)
chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
else
chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
total += chunk_count * count;
}
av_dlog(mov->fc, "chunk count %d\n", total);
if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
return;
if (av_reallocp_array(&st->index_entries,
st->nb_index_entries + total,
sizeof(*st->index_entries)) < 0) {
st->nb_index_entries = 0;
return;
}
st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
// populate index
for (i = 0; i < sc->chunk_count; i++) {
current_offset = sc->chunk_offsets[i];
if (stsc_index + 1 < sc->stsc_count &&
i + 1 == sc->stsc_data[stsc_index + 1].first)
stsc_index++;
chunk_samples = sc->stsc_data[stsc_index].count;
while (chunk_samples > 0) {
AVIndexEntry *e;
unsigned size, samples;
if (sc->samples_per_frame >= 160) { // gsm
samples = sc->samples_per_frame;
size = sc->bytes_per_frame;
} else {
if (sc->samples_per_frame > 1) {
samples = FFMIN((1024 / sc->samples_per_frame)*
sc->samples_per_frame, chunk_samples);
size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
} else {
samples = FFMIN(1024, chunk_samples);
size = samples * sc->sample_size;
}
}
if (st->nb_index_entries >= total) {
av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
return;
}
e = &st->index_entries[st->nb_index_entries++];
e->pos = current_offset;
e->timestamp = current_dts;
e->size = size;
e->min_distance = 0;
e->flags = AVINDEX_KEYFRAME;
av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
"size %d, duration %d\n", st->index, i, current_offset, current_dts,
size, samples);
current_offset += size;
current_dts += samples;
chunk_samples -= samples;
}
}
}
}
static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
{
/* try relative path, we do not try the absolute because it can leak information about our
system to an attacker */
if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
char filename[1024];
const char *src_path;
int i, l;
/* find a source dir */
src_path = strrchr(src, '/');
if (src_path)
src_path++;
else
src_path = src;
/* find a next level down to target */
for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
if (ref->path[l] == '/') {
if (i == ref->nlvl_to - 1)
break;
else
i++;
}
/* compose filename if next level down to target was found */
if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
memcpy(filename, src, src_path - src);
filename[src_path - src] = 0;
for (i = 1; i < ref->nlvl_from; i++)
av_strlcat(filename, "../", 1024);
av_strlcat(filename, ref->path + l + 1, 1024);
if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
return 0;
}
} else if (use_absolute_path) {
av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
"this is a possible security issue\n");
if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
return 0;
}
return AVERROR(ENOENT);
}
static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
{
if (sc->time_scale <= 0) {
av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
sc->time_scale = c->time_scale;
if (sc->time_scale <= 0)
sc->time_scale = 1;
}
}
static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
MOVStreamContext *sc;
int ret;
st = avformat_new_stream(c->fc, NULL);
if (!st) return AVERROR(ENOMEM);
st->id = c->fc->nb_streams;
sc = av_mallocz(sizeof(MOVStreamContext));
if (!sc) return AVERROR(ENOMEM);
st->priv_data = sc;
st->codec->codec_type = AVMEDIA_TYPE_DATA;
sc->ffindex = st->index;
if ((ret = mov_read_default(c, pb, atom)) < 0)
return ret;
/* sanity checks */
if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
(!sc->sample_size && !sc->sample_count))) {
av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
st->index);
return 0;
}
fix_timescale(c, sc);
avpriv_set_pts_info(st, 64, 1, sc->time_scale);
mov_build_index(c, st);
if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
MOVDref *dref = &sc->drefs[sc->dref_id - 1];
if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
c->use_absolute_path, c->fc) < 0)
av_log(c->fc, AV_LOG_ERROR,
"stream %d, error opening alias: path='%s', dir='%s', "
"filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
st->index, dref->path, dref->dir, dref->filename,
dref->volume, dref->nlvl_from, dref->nlvl_to);
} else {
sc->pb = c->fc->pb;
sc->pb_is_copied = 1;
}
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
if (!st->sample_aspect_ratio.num &&
(st->codec->width != sc->width || st->codec->height != sc->height)) {
st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
((double)st->codec->width * sc->height), INT_MAX);
}
#if FF_API_R_FRAME_RATE
if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
sc->time_scale, sc->stts_data[0].duration, INT_MAX);
#endif
}
// done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
TAG_IS_AVCI(st->codec->codec_tag)) {
ret = ff_generate_avci_extradata(st);
if (ret < 0)
return ret;
}
switch (st->codec->codec_id) {
#if CONFIG_H261_DECODER
case AV_CODEC_ID_H261:
#endif
#if CONFIG_H263_DECODER
case AV_CODEC_ID_H263:
#endif
#if CONFIG_MPEG4_DECODER
case AV_CODEC_ID_MPEG4:
#endif
st->codec->width = 0; /* let decoder init width/height */
st->codec->height= 0;
break;
}
/* Do not need those anymore. */
av_freep(&sc->chunk_offsets);
av_freep(&sc->stsc_data);
av_freep(&sc->sample_sizes);
av_freep(&sc->keyframes);
av_freep(&sc->stts_data);
av_freep(&sc->stps_data);
av_freep(&sc->elst_data);
av_freep(&sc->rap_group);
return 0;
}
static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret;
c->itunes_metadata = 1;
ret = mov_read_default(c, pb, atom);
c->itunes_metadata = 0;
return ret;
}
static int mov_read_custom_2plus(MOVContext *c, AVIOContext *pb, int size)
{
int64_t end = avio_tell(pb) + size;
uint8_t *key = NULL, *val = NULL;
int i;
AVStream *st;
MOVStreamContext *sc;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
for (i = 0; i < 2; i++) {
uint8_t **p;
uint32_t len, tag;
if (end - avio_tell(pb) <= 12)
break;
len = avio_rb32(pb);
tag = avio_rl32(pb);
avio_skip(pb, 4); // flags
if (len < 12 || len - 12 > end - avio_tell(pb))
break;
len -= 12;
if (tag == MKTAG('n', 'a', 'm', 'e'))
p = &key;
else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
avio_skip(pb, 4);
len -= 4;
p = &val;
} else
break;
*p = av_malloc(len + 1);
if (!*p)
break;
avio_read(pb, *p, len);
(*p)[len] = 0;
}
if (key && val) {
if (strcmp(key, "iTunSMPB") == 0) {
int priming, remainder, samples;
if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
if(priming>0 && priming<16384)
sc->start_pad = priming;
}
}
if (strcmp(key, "cdec") != 0) {
av_dict_set(&c->fc->metadata, key, val,
AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
key = val = NULL;
}
}
avio_seek(pb, end, SEEK_SET);
av_freep(&key);
av_freep(&val);
return 0;
}
static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int64_t end = avio_tell(pb) + atom.size;
uint32_t tag, len;
if (atom.size < 8)
goto fail;
len = avio_rb32(pb);
tag = avio_rl32(pb);
if (len > atom.size)
goto fail;
if (tag == MKTAG('m', 'e', 'a', 'n') && len > 12) {
uint8_t domain[128];
int domain_len;
avio_skip(pb, 4); // flags
len -= 12;
domain_len = avio_get_str(pb, len, domain, sizeof(domain));
avio_skip(pb, len - domain_len);
return mov_read_custom_2plus(c, pb, end - avio_tell(pb));
}
fail:
av_log(c->fc, AV_LOG_VERBOSE,
"Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
return 0;
}
static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
while (atom.size > 8) {
uint32_t tag = avio_rl32(pb);
atom.size -= 4;
if (tag == MKTAG('h','d','l','r')) {
avio_seek(pb, -8, SEEK_CUR);
atom.size += 8;
return mov_read_default(c, pb, atom);
}
}
return 0;
}
static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int i;
int width;
int height;
int display_matrix[3][3];
AVStream *st;
MOVStreamContext *sc;
int version;
int flags;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
sc = st->priv_data;
version = avio_r8(pb);
flags = avio_rb24(pb);
st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
if (version == 1) {
avio_rb64(pb);
avio_rb64(pb);
} else {
avio_rb32(pb); /* creation time */
avio_rb32(pb); /* modification time */
}
st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
avio_rb32(pb); /* reserved */
/* highlevel (considering edits) duration in movie timebase */
(version == 1) ? avio_rb64(pb) : avio_rb32(pb);
avio_rb32(pb); /* reserved */
avio_rb32(pb); /* reserved */
avio_rb16(pb); /* layer */
avio_rb16(pb); /* alternate group */
avio_rb16(pb); /* volume */
avio_rb16(pb); /* reserved */
//read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
// they're kept in fixed point format through all calculations
// save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
// side data, but the scale factor is not needed to calculate aspect ratio
for (i = 0; i < 3; i++) {
display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
}
width = avio_rb32(pb); // 16.16 fixed point track width
height = avio_rb32(pb); // 16.16 fixed point track height
sc->width = width >> 16;
sc->height = height >> 16;
// save the matrix and add rotate metadata when it is not the default
// identity
if (display_matrix[0][0] != (1 << 16) ||
display_matrix[1][1] != (1 << 16) ||
display_matrix[2][2] != (1 << 30) ||
display_matrix[0][1] || display_matrix[0][2] ||
display_matrix[1][0] || display_matrix[1][2] ||
display_matrix[2][0] || display_matrix[2][1]) {
int i, j;
double rotate;
av_freep(&sc->display_matrix);
sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
if (!sc->display_matrix)
return AVERROR(ENOMEM);
for (i = 0; i < 3; i++)
for (j = 0; j < 3; j++)
sc->display_matrix[i * 3 + j] = display_matrix[j][i];
rotate = av_display_rotation_get(sc->display_matrix);
if (!isnan(rotate)) {
char rotate_buf[64];
rotate = -rotate;
if (rotate < 0) // for backward compatibility
rotate += 360;
snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
}
}
// transform the display width/height according to the matrix
// to keep the same scale, use [width height 1<<16]
if (width && height && sc->display_matrix) {
double disp_transform[2];
#define SQR(a) ((a)*(double)(a))
for (i = 0; i < 2; i++)
disp_transform[i] = sqrt(SQR(display_matrix[i][0]) + SQR(display_matrix[i][1]));
if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
st->sample_aspect_ratio = av_d2q(
disp_transform[0] / disp_transform[1],
INT_MAX);
}
return 0;
}
static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVFragment *frag = &c->fragment;
MOVTrackExt *trex = NULL;
MOVFragmentIndex* index = NULL;
int flags, track_id, i;
avio_r8(pb); /* version */
flags = avio_rb24(pb);
track_id = avio_rb32(pb);
if (!track_id)
return AVERROR_INVALIDDATA;
frag->track_id = track_id;
for (i = 0; i < c->trex_count; i++)
if (c->trex_data[i].track_id == frag->track_id) {
trex = &c->trex_data[i];
break;
}
if (!trex) {
av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
return AVERROR_INVALIDDATA;
}
for (i = 0; i < c->fragment_index_count; i++) {
MOVFragmentIndex* candidate = c->fragment_index_data[i];
if (candidate->track_id == frag->track_id) {
av_log(c->fc, AV_LOG_DEBUG,
"found fragment index for track %u\n", frag->track_id);
index = candidate;
break;
}
}
frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
frag->moof_offset : frag->implicit_offset;
frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
avio_rb32(pb) : trex->duration;
frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
avio_rb32(pb) : trex->size;
frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
avio_rb32(pb) : trex->flags;
frag->time = AV_NOPTS_VALUE;
if (index) {
int i, found = 0;
for (i = index->current_item; i < index->item_count; i++) {
if (frag->implicit_offset == index->items[i].moof_offset) {
av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
"for track %u and moof_offset %"PRId64"\n",
frag->track_id, index->items[i].moof_offset);
frag->time = index->items[i].time;
index->current_item = i + 1;
found = 1;
}
}
if (!found) {
av_log(c->fc, AV_LOG_WARNING, "track %u has a fragment index "
"but it doesn't have an (in-order) entry for moof_offset "
"%"PRId64"\n", frag->track_id, frag->implicit_offset);
}
}
av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
return 0;
}
static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
c->chapter_track = avio_rb32(pb);
return 0;
}
static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVTrackExt *trex;
int err;
if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
return AVERROR_INVALIDDATA;
if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
sizeof(*c->trex_data))) < 0) {
c->trex_count = 0;
return err;
}
c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
trex = &c->trex_data[c->trex_count++];
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
trex->track_id = avio_rb32(pb);
trex->stsd_id = avio_rb32(pb);
trex->duration = avio_rb32(pb);
trex->size = avio_rb32(pb);
trex->flags = avio_rb32(pb);
return 0;
}
static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVFragment *frag = &c->fragment;
AVStream *st = NULL;
MOVStreamContext *sc;
int version, i;
for (i = 0; i < c->fc->nb_streams; i++) {
if (c->fc->streams[i]->id == frag->track_id) {
st = c->fc->streams[i];
break;
}
}
if (!st) {
av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
return AVERROR_INVALIDDATA;
}
sc = st->priv_data;
if (sc->pseudo_stream_id + 1 != frag->stsd_id)
return 0;
version = avio_r8(pb);
avio_rb24(pb); /* flags */
if (version) {
sc->track_end = avio_rb64(pb);
} else {
sc->track_end = avio_rb32(pb);
}
return 0;
}
static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVFragment *frag = &c->fragment;
AVStream *st = NULL;
MOVStreamContext *sc;
MOVStts *ctts_data;
uint64_t offset;
int64_t dts;
int data_offset = 0;
unsigned entries, first_sample_flags = frag->flags;
int flags, distance, i, found_keyframe = 0, err;
for (i = 0; i < c->fc->nb_streams; i++) {
if (c->fc->streams[i]->id == frag->track_id) {
st = c->fc->streams[i];
break;
}
}
if (!st) {
av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
return AVERROR_INVALIDDATA;
}
sc = st->priv_data;
if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
return 0;
avio_r8(pb); /* version */
flags = avio_rb24(pb);
entries = avio_rb32(pb);
av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
/* Always assume the presence of composition time offsets.
* Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
* 1) in the initial movie, there are no samples.
* 2) in the first movie fragment, there is only one sample without composition time offset.
* 3) in the subsequent movie fragments, there are samples with composition time offset. */
if (!sc->ctts_count && sc->sample_count)
{
/* Complement ctts table if moov atom doesn't have ctts atom. */
ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
if (!ctts_data)
return AVERROR(ENOMEM);
sc->ctts_data = ctts_data;
sc->ctts_data[sc->ctts_count].count = sc->sample_count;
sc->ctts_data[sc->ctts_count].duration = 0;
sc->ctts_count++;
}
if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
return AVERROR_INVALIDDATA;
if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
sizeof(*sc->ctts_data))) < 0) {
sc->ctts_count = 0;
return err;
}
if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
dts = sc->track_end - sc->time_offset;
offset = frag->base_data_offset + data_offset;
distance = 0;
av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
for (i = 0; i < entries && !pb->eof_reached; i++) {
unsigned sample_size = frag->size;
int sample_flags = i ? frag->flags : first_sample_flags;
unsigned sample_duration = frag->duration;
int keyframe = 0;
if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
sc->ctts_data[sc->ctts_count].count = 1;
sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
avio_rb32(pb) : 0;
mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
if (frag->time != AV_NOPTS_VALUE) {
if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
int64_t pts = frag->time;
av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
" sc->dts_shift %d ctts.duration %d"
" sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
dts = pts - sc->dts_shift;
if (flags & MOV_TRUN_SAMPLE_CTS) {
dts -= sc->ctts_data[sc->ctts_count].duration;
} else {
dts -= sc->time_offset;
}
av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
} else {
dts = frag->time;
av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
", using it for dts\n", dts);
}
frag->time = AV_NOPTS_VALUE;
}
sc->ctts_count++;
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
keyframe = 1;
else if (!found_keyframe)
keyframe = found_keyframe =
!(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
if (keyframe)
distance = 0;
av_add_index_entry(st, offset, dts, sample_size, distance,
keyframe ? AVINDEX_KEYFRAME : 0);
av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
"size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
offset, dts, sample_size, distance, keyframe);
distance++;
dts += sample_duration;
offset += sample_size;
sc->data_size += sample_size;
sc->duration_for_fps += sample_duration;
sc->nb_frames_for_fps ++;
}
if (pb->eof_reached)
return AVERROR_EOF;
frag->implicit_offset = offset;
st->duration = sc->track_end = dts + sc->time_offset;
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, AVIOContext *pb, MOVAtom atom)
{
int err;
if (atom.size < 8)
return 0; /* continue */
if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
avio_skip(pb, atom.size - 4);
return 0;
}
atom.type = avio_rl32(pb);
atom.size -= 8;
if (atom.type != MKTAG('m','d','a','t')) {
avio_skip(pb, atom.size);
return 0;
}
err = mov_read_mdat(c, pb, atom);
return err;
}
static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
#if CONFIG_ZLIB
AVIOContext ctx;
uint8_t *cmov_data;
uint8_t *moov_data; /* uncompressed data */
long cmov_len, moov_len;
int ret = -1;
avio_rb32(pb); /* dcom atom */
if (avio_rl32(pb) != MKTAG('d','c','o','m'))
return AVERROR_INVALIDDATA;
if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
return AVERROR_INVALIDDATA;
}
avio_rb32(pb); /* cmvd atom */
if (avio_rl32(pb) != MKTAG('c','m','v','d'))
return AVERROR_INVALIDDATA;
moov_len = avio_rb32(pb); /* uncompressed size */
cmov_len = atom.size - 6 * 4;
cmov_data = av_malloc(cmov_len);
if (!cmov_data)
return AVERROR(ENOMEM);
moov_data = av_malloc(moov_len);
if (!moov_data) {
av_free(cmov_data);
return AVERROR(ENOMEM);
}
avio_read(pb, cmov_data, cmov_len);
if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
goto free_and_return;
if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
goto free_and_return;
atom.type = MKTAG('m','o','o','v');
atom.size = moov_len;
ret = mov_read_default(c, &ctx, atom);
free_and_return:
av_free(moov_data);
av_free(cmov_data);
return ret;
#else
av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
return AVERROR(ENOSYS);
#endif
}
/* edit list atom */
static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVStreamContext *sc;
int i, edit_count, version;
if (c->fc->nb_streams < 1 || c->ignore_editlist)
return 0;
sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
version = avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
edit_count = avio_rb32(pb); /* entries */
if (!edit_count)
return 0;
if (sc->elst_data)
av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
av_free(sc->elst_data);
sc->elst_count = 0;
sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
if (!sc->elst_data)
return AVERROR(ENOMEM);
av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
for (i = 0; i < edit_count && !pb->eof_reached; i++) {
MOVElst *e = &sc->elst_data[i];
if (version == 1) {
e->duration = avio_rb64(pb);
e->time = avio_rb64(pb);
} else {
e->duration = avio_rb32(pb); /* segment duration */
e->time = (int32_t)avio_rb32(pb); /* media time */
}
e->rate = avio_rb32(pb) / 65536.0;
av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
e->duration, e->time, e->rate);
}
sc->elst_count = i;
return 0;
}
static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
MOVStreamContext *sc;
if (c->fc->nb_streams < 1)
return AVERROR_INVALIDDATA;
sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
sc->timecode_track = avio_rb32(pb);
return 0;
}
static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret;
uint8_t uuid[16];
static const uint8_t uuid_isml_manifest[] = {
0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
};
if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
return AVERROR_INVALIDDATA;
ret = avio_read(pb, uuid, sizeof(uuid));
if (ret < 0) {
return ret;
} else if (ret != sizeof(uuid)) {
return AVERROR_INVALIDDATA;
}
if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
uint8_t *buffer, *ptr;
char *endptr;
size_t len = atom.size - sizeof(uuid);
if (len < 4) {
return AVERROR_INVALIDDATA;
}
ret = avio_skip(pb, 4); // zeroes
len -= 4;
buffer = av_mallocz(len + 1);
if (!buffer) {
return AVERROR(ENOMEM);
}
ret = avio_read(pb, buffer, len);
if (ret < 0) {
av_free(buffer);
return ret;
} else if (ret != len) {
av_free(buffer);
return AVERROR_INVALIDDATA;
}
ptr = buffer;
while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
ptr += sizeof("systemBitrate=\"") - 1;
c->bitrates_count++;
c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
if (!c->bitrates) {
c->bitrates_count = 0;
av_free(buffer);
return AVERROR(ENOMEM);
}
errno = 0;
ret = strtol(ptr, &endptr, 10);
if (ret < 0 || errno || *endptr != '"') {
c->bitrates[c->bitrates_count - 1] = 0;
} else {
c->bitrates[c->bitrates_count - 1] = ret;
}
}
av_free(buffer);
}
return 0;
}
static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret;
uint8_t content[16];
if (atom.size < 8)
return 0;
ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
if (ret < 0)
return ret;
if ( !c->found_moov
&& !c->found_mdat
&& !memcmp(content, "Anevia\x1A\x1A", 8)
&& c->use_mfra_for == FF_MOV_FLAG_MFRA_AUTO) {
c->use_mfra_for = FF_MOV_FLAG_MFRA_PTS;
}
return 0;
}
static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('A','C','L','R'), mov_read_avid },
{ MKTAG('A','P','R','G'), mov_read_avid },
{ MKTAG('A','A','L','P'), mov_read_avid },
{ MKTAG('A','R','E','S'), mov_read_ares },
{ MKTAG('a','v','s','s'), mov_read_avss },
{ MKTAG('c','h','p','l'), mov_read_chpl },
{ MKTAG('c','o','6','4'), mov_read_stco },
{ MKTAG('c','o','l','r'), mov_read_colr },
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
{ MKTAG('d','i','n','f'), mov_read_default },
{ MKTAG('D','p','x','E'), mov_read_dpxe },
{ MKTAG('d','r','e','f'), mov_read_dref },
{ 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','i','e','l'), mov_read_fiel },
{ MKTAG('f','t','y','p'), mov_read_ftyp },
{ MKTAG('g','l','b','l'), mov_read_glbl },
{ MKTAG('h','d','l','r'), mov_read_hdlr },
{ MKTAG('i','l','s','t'), mov_read_ilst },
{ MKTAG('j','p','2','h'), mov_read_jp2h },
{ 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','e','t','a'), mov_read_meta },
{ MKTAG('m','i','n','f'), mov_read_default },
{ MKTAG('m','o','o','f'), mov_read_moof },
{ MKTAG('m','o','o','v'), mov_read_moov },
{ MKTAG('m','v','e','x'), mov_read_default },
{ MKTAG('m','v','h','d'), mov_read_mvhd },
{ MKTAG('S','M','I',' '), mov_read_svq3 },
{ MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
{ MKTAG('a','v','c','C'), mov_read_glbl },
{ MKTAG('p','a','s','p'), mov_read_pasp },
{ MKTAG('s','t','b','l'), mov_read_default },
{ MKTAG('s','t','c','o'), mov_read_stco },
{ MKTAG('s','t','p','s'), mov_read_stps },
{ MKTAG('s','t','r','f'), mov_read_strf },
{ MKTAG('s','t','s','c'), mov_read_stsc },
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
{ 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('s','t','z','2'), mov_read_stsz }, /* compact sample size */
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
{ MKTAG('t','f','d','t'), mov_read_tfdt },
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
{ MKTAG('t','r','a','k'), mov_read_trak },
{ MKTAG('t','r','a','f'), mov_read_default },
{ MKTAG('t','r','e','f'), mov_read_default },
{ MKTAG('t','m','c','d'), mov_read_tmcd },
{ MKTAG('c','h','a','p'), mov_read_chap },
{ MKTAG('t','r','e','x'), mov_read_trex },
{ MKTAG('t','r','u','n'), mov_read_trun },
{ MKTAG('u','d','t','a'), mov_read_default },
{ MKTAG('w','a','v','e'), mov_read_wave },
{ MKTAG('e','s','d','s'), mov_read_esds },
{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
{ MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
{ MKTAG('w','f','e','x'), mov_read_wfex },
{ MKTAG('c','m','o','v'), mov_read_cmov },
{ MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
{ MKTAG('d','v','c','1'), mov_read_dvc1 },
{ MKTAG('s','b','g','p'), mov_read_sbgp },
{ MKTAG('h','v','c','C'), mov_read_glbl },
{ MKTAG('u','u','i','d'), mov_read_uuid },
{ MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
{ MKTAG('f','r','e','e'), mov_read_free },
{ MKTAG('-','-','-','-'), mov_read_custom },
{ 0, NULL }
};
static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int64_t total_size = 0;
MOVAtom a;
int i;
if (c->atom_depth > 10) {
av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
return AVERROR_INVALIDDATA;
}
c->atom_depth ++;
if (atom.size < 0)
atom.size = INT64_MAX;
while (total_size + 8 <= atom.size && !avio_feof(pb)) {
int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
a.size = atom.size;
a.type=0;
if (atom.size >= 8) {
a.size = avio_rb32(pb);
a.type = avio_rl32(pb);
if (a.type == MKTAG('f','r','e','e') &&
a.size >= 8 &&
c->moov_retry) {
uint8_t buf[8];
uint32_t *type = (uint32_t *)buf + 1;
avio_read(pb, buf, 8);
avio_seek(pb, -8, SEEK_CUR);
if (*type == MKTAG('m','v','h','d') ||
*type == MKTAG('c','m','o','v')) {
av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
a.type = MKTAG('m','o','o','v');
}
}
if (atom.type != MKTAG('r','o','o','t') &&
atom.type != MKTAG('m','o','o','v'))
{
if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
{
av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
avio_skip(pb, -8);
c->atom_depth --;
return 0;
}
}
total_size += 8;
if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
a.size = avio_rb64(pb) - 8;
total_size += 8;
}
}
av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
if (a.size == 0) {
a.size = atom.size - total_size + 8;
}
a.size -= 8;
if (a.size < 0)
break;
a.size = FFMIN(a.size, atom.size - total_size);
for (i = 0; mov_default_parse_table[i].type; i++)
if (mov_default_parse_table[i].type == a.type) {
parse = mov_default_parse_table[i].parse;
break;
}
// container is user data
if (!parse && (atom.type == MKTAG('u','d','t','a') ||
atom.type == MKTAG('i','l','s','t')))
parse = mov_read_udta_string;
if (!parse) { /* skip leaf atoms data */
avio_skip(pb, a.size);
} else {
int64_t start_pos = avio_tell(pb);
int64_t left;
int err = parse(c, pb, a);
if (err < 0) {
c->atom_depth --;
return err;
}
if (c->found_moov && c->found_mdat &&
((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
start_pos + a.size == avio_size(pb))) {
if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
c->next_root_atom = start_pos + a.size;
c->atom_depth --;
return 0;
}
left = a.size - avio_tell(pb) + start_pos;
if (left > 0) /* skip garbage at atom end */
avio_skip(pb, left);
else if (left < 0) {
av_log(c->fc, AV_LOG_WARNING,
"overread end of atom '%.4s' by %"PRId64" bytes\n",
(char*)&a.type, -left);
avio_seek(pb, left, SEEK_CUR);
}
}
total_size += a.size;
}
if (total_size < atom.size && atom.size < 0x7ffff)
avio_skip(pb, atom.size - total_size);
c->atom_depth --;
return 0;
}
static int mov_probe(AVProbeData *p)
{
int64_t offset;
uint32_t tag;
int score = 0;
int moov_offset = -1;
/* check file header */
offset = 0;
for (;;) {
/* ignore invalid offset */
if ((offset + 8) > (unsigned int)p->buf_size)
break;
tag = AV_RL32(p->buf + offset + 4);
switch(tag) {
/* check for obvious tags */
case MKTAG('m','o','o','v'):
moov_offset = offset + 4;
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 */
case MKTAG('f','t','y','p'):
if (AV_RB32(p->buf+offset) < 8 &&
(AV_RB32(p->buf+offset) != 1 ||
offset + 12 > (unsigned int)p->buf_size ||
AV_RB64(p->buf+offset + 8) == 0)) {
score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
} else if (tag == MKTAG('f','t','y','p') &&
AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')) {
score = FFMAX(score, 5);
} else {
score = AVPROBE_SCORE_MAX;
}
offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
break;
/* those are more common words, so rate then a bit less */
case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
case MKTAG('w','i','d','e'):
case MKTAG('f','r','e','e'):
case MKTAG('j','u','n','k'):
case MKTAG('p','i','c','t'):
score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
break;
case MKTAG(0x82,0x82,0x7f,0x7d):
case MKTAG('s','k','i','p'):
case MKTAG('u','u','i','d'):
case MKTAG('p','r','f','l'):
/* if we only find those cause probedata is too small at least rate them */
score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
break;
default:
offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
}
}
if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
/* moov atom in the header - we should make sure that this is not a
* MOV-packed MPEG-PS */
offset = moov_offset;
while(offset < (p->buf_size - 16)){ /* Sufficient space */
/* We found an actual hdlr atom */
if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
/* We found a media handler reference atom describing an
* MPEG-PS-in-MOV, return a
* low score to force expanding the probe window until
* mpegps_probe finds what it needs */
return 5;
}else
/* Keep looking */
offset+=2;
}
}
return score;
}
// must be done after parsing all trak because there's no order requirement
static void mov_read_chapters(AVFormatContext *s)
{
MOVContext *mov = s->priv_data;
AVStream *st = NULL;
MOVStreamContext *sc;
int64_t cur_pos;
int i;
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->id == mov->chapter_track) {
st = s->streams[i];
break;
}
if (!st) {
av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
return;
}
st->discard = AVDISCARD_ALL;
sc = st->priv_data;
cur_pos = avio_tell(sc->pb);
for (i = 0; i < st->nb_index_entries; i++) {
AVIndexEntry *sample = &st->index_entries[i];
int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
uint8_t *title;
uint16_t ch;
int len, title_len;
if (end < sample->timestamp) {
av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
end = AV_NOPTS_VALUE;
}
if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
goto finish;
}
// the first two bytes are the length of the title
len = avio_rb16(sc->pb);
if (len > sample->size-2)
continue;
title_len = 2*len + 1;
if (!(title = av_mallocz(title_len)))
goto finish;
// The samples could theoretically be in any encoding if there's an encd
// atom following, but in practice are only utf-8 or utf-16, distinguished
// instead by the presence of a BOM
if (!len) {
title[0] = 0;
} else {
ch = avio_rb16(sc->pb);
if (ch == 0xfeff)
avio_get_str16be(sc->pb, len, title, title_len);
else if (ch == 0xfffe)
avio_get_str16le(sc->pb, len, title, title_len);
else {
AV_WB16(title, ch);
if (len == 1 || len == 2)
title[len] = 0;
else
avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
}
}
avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
av_freep(&title);
}
finish:
avio_seek(sc->pb, cur_pos, SEEK_SET);
}
static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
uint32_t value, int flags)
{
AVTimecode tc;
char buf[AV_TIMECODE_STR_SIZE];
AVRational rate = {st->codec->time_base.den,
st->codec->time_base.num};
int ret = av_timecode_init(&tc, rate, flags, 0, s);
if (ret < 0)
return ret;
av_dict_set(&st->metadata, "timecode",
av_timecode_make_string(&tc, buf, value), 0);
return 0;
}
static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
{
MOVStreamContext *sc = st->priv_data;
int flags = 0;
int64_t cur_pos = avio_tell(sc->pb);
uint32_t value;
if (!st->nb_index_entries)
return -1;
avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
value = avio_rb32(s->pb);
if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
/* Assume Counter flag is set to 1 in tmcd track (even though it is likely
* not the case) and thus assume "frame number format" instead of QT one.
* No sample with tmcd track can be found with a QT timecode at the moment,
* despite what the tmcd track "suggests" (Counter flag set to 0 means QT
* format). */
parse_timecode_in_framenum_format(s, st, value, flags);
avio_seek(sc->pb, cur_pos, SEEK_SET);
return 0;
}
static int mov_read_close(AVFormatContext *s)
{
MOVContext *mov = s->priv_data;
int i, j;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
av_freep(&sc->ctts_data);
for (j = 0; j < sc->drefs_count; j++) {
av_freep(&sc->drefs[j].path);
av_freep(&sc->drefs[j].dir);
}
av_freep(&sc->drefs);
sc->drefs_count = 0;
if (!sc->pb_is_copied)
avio_closep(&sc->pb);
sc->pb = NULL;
av_freep(&sc->chunk_offsets);
av_freep(&sc->stsc_data);
av_freep(&sc->sample_sizes);
av_freep(&sc->keyframes);
av_freep(&sc->stts_data);
av_freep(&sc->stps_data);
av_freep(&sc->elst_data);
av_freep(&sc->rap_group);
av_freep(&sc->display_matrix);
}
if (mov->dv_demux) {
avformat_free_context(mov->dv_fctx);
mov->dv_fctx = NULL;
}
av_freep(&mov->trex_data);
av_freep(&mov->bitrates);
for (i = 0; i < mov->fragment_index_count; i++) {
MOVFragmentIndex* index = mov->fragment_index_data[i];
av_freep(&index->items);
av_freep(&mov->fragment_index_data[i]);
}
av_freep(&mov->fragment_index_data);
return 0;
}
static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
sc->timecode_track == tmcd_id)
return 1;
}
return 0;
}
/* look for a tmcd track not referenced by any video track, and export it globally */
static void export_orphan_timecode(AVFormatContext *s)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
!tmcd_is_referenced(s, i + 1)) {
AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
if (tcr) {
av_dict_set(&s->metadata, "timecode", tcr->value, 0);
break;
}
}
}
}
static int read_tfra(MOVContext *mov, AVIOContext *f)
{
MOVFragmentIndex* index = NULL;
int version, fieldlength, i, j;
int64_t pos = avio_tell(f);
uint32_t size = avio_rb32(f);
void *tmp;
if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
return 1;
}
av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
index = av_mallocz(sizeof(MOVFragmentIndex));
if (!index) {
return AVERROR(ENOMEM);
}
tmp = av_realloc_array(mov->fragment_index_data,
mov->fragment_index_count + 1,
sizeof(MOVFragmentIndex*));
if (!tmp) {
av_freep(&index);
return AVERROR(ENOMEM);
}
mov->fragment_index_data = tmp;
mov->fragment_index_data[mov->fragment_index_count++] = index;
version = avio_r8(f);
avio_rb24(f);
index->track_id = avio_rb32(f);
fieldlength = avio_rb32(f);
index->item_count = avio_rb32(f);
index->items = av_mallocz_array(
index->item_count, sizeof(MOVFragmentIndexItem));
if (!index->items) {
index->item_count = 0;
return AVERROR(ENOMEM);
}
for (i = 0; i < index->item_count; i++) {
int64_t time, offset;
if (version == 1) {
time = avio_rb64(f);
offset = avio_rb64(f);
} else {
time = avio_rb32(f);
offset = avio_rb32(f);
}
index->items[i].time = time;
index->items[i].moof_offset = offset;
for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
avio_r8(f);
for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
avio_r8(f);
for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
avio_r8(f);
}
avio_seek(f, pos + size, SEEK_SET);
return 0;
}
static int mov_read_mfra(MOVContext *c, AVIOContext *f)
{
int64_t stream_size = avio_size(f);
int64_t original_pos = avio_tell(f);
int64_t seek_ret;
int32_t mfra_size;
int ret = -1;
if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
ret = seek_ret;
goto fail;
}
mfra_size = avio_rb32(f);
if (mfra_size < 0 || mfra_size > stream_size) {
av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
goto fail;
}
if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
ret = seek_ret;
goto fail;
}
if (avio_rb32(f) != mfra_size) {
av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
goto fail;
}
if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
goto fail;
}
av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
do {
ret = read_tfra(c, f);
if (ret < 0)
goto fail;
} while (!ret);
ret = 0;
fail:
seek_ret = avio_seek(f, original_pos, SEEK_SET);
if (seek_ret < 0) {
av_log(c->fc, AV_LOG_ERROR,
"failed to seek back after looking for mfra\n");
ret = seek_ret;
}
return ret;
}
static int mov_read_header(AVFormatContext *s)
{
MOVContext *mov = s->priv_data;
AVIOContext *pb = s->pb;
int j, err;
MOVAtom atom = { AV_RL32("root") };
int i;
mov->fc = s;
/* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
if (pb->seekable)
atom.size = avio_size(pb);
else
atom.size = INT64_MAX;
/* check MOV header */
do {
if (mov->moov_retry)
avio_seek(pb, 0, SEEK_SET);
if ((err = mov_read_default(mov, pb, atom)) < 0) {
av_log(s, AV_LOG_ERROR, "error reading header\n");
mov_read_close(s);
return err;
}
} while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
if (!mov->found_moov) {
av_log(s, AV_LOG_ERROR, "moov atom not found\n");
mov_read_close(s);
return AVERROR_INVALIDDATA;
}
av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
if (pb->seekable) {
if (mov->chapter_track > 0)
mov_read_chapters(s);
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
mov_read_timecode_track(s, s->streams[i]);
}
/* copy timecode metadata from tmcd tracks to the related video streams */
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
if (sc->timecode_track > 0) {
AVDictionaryEntry *tcr;
int tmcd_st_id = -1;
for (j = 0; j < s->nb_streams; j++)
if (s->streams[j]->id == sc->timecode_track)
tmcd_st_id = j;
if (tmcd_st_id < 0 || tmcd_st_id == i)
continue;
tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
if (tcr)
av_dict_set(&st->metadata, "timecode", tcr->value, 0);
}
}
export_orphan_timecode(s);
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
fix_timescale(mov, sc);
if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
st->skip_samples = sc->start_pad;
}
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
if (st->codec->width <= 0 || st->codec->height <= 0) {
st->codec->width = sc->width;
st->codec->height = sc->height;
}
if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
return err;
}
}
}
if (mov->trex_data) {
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
if (st->duration > 0)
st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
}
}
if (mov->use_mfra_for > 0) {
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
if (sc->duration_for_fps > 0) {
st->codec->bit_rate = sc->data_size * 8 * sc->time_scale /
sc->duration_for_fps;
}
}
}
for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
if (mov->bitrates[i]) {
s->streams[i]->codec->bit_rate = mov->bitrates[i];
}
}
ff_rfps_calculate(s);
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
switch (st->codec->codec_type) {
case AVMEDIA_TYPE_AUDIO:
err = ff_replaygain_export(st, s->metadata);
if (err < 0) {
mov_read_close(s);
return err;
}
break;
case AVMEDIA_TYPE_VIDEO:
if (sc->display_matrix) {
AVPacketSideData *sd, *tmp;
tmp = av_realloc_array(st->side_data,
st->nb_side_data + 1, sizeof(*tmp));
if (!tmp)
return AVERROR(ENOMEM);
st->side_data = tmp;
st->nb_side_data++;
sd = &st->side_data[st->nb_side_data - 1];
sd->type = AV_PKT_DATA_DISPLAYMATRIX;
sd->size = sizeof(int32_t) * 9;
sd->data = (uint8_t*)sc->display_matrix;
sc->display_matrix = NULL;
}
break;
}
}
return 0;
}
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
{
AVIndexEntry *sample = NULL;
int64_t best_dts = INT64_MAX;
int i;
for (i = 0; i < s->nb_streams; i++) {
AVStream *avst = s->streams[i];
MOVStreamContext *msc = avst->priv_data;
if (msc->pb && msc->current_sample < avst->nb_index_entries) {
AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
(s->pb->seekable &&
((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
(FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
sample = current_sample;
best_dts = dts;
*st = avst;
}
}
}
return sample;
}
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
{
MOVContext *mov = s->priv_data;
MOVStreamContext *sc;
AVIndexEntry *sample;
AVStream *st = NULL;
int ret;
mov->fc = s;
retry:
sample = mov_find_next_sample(s, &st);
if (!sample) {
mov->found_mdat = 0;
if (!mov->next_root_atom)
return AVERROR_EOF;
avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
mov->next_root_atom = 0;
if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
avio_feof(s->pb))
return AVERROR_EOF;
av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
goto retry;
}
sc = st->priv_data;
/* must be done just before reading, to avoid infinite loop on sample */
sc->current_sample++;
if (mov->next_root_atom) {
sample->pos = FFMIN(sample->pos, mov->next_root_atom);
sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
}
if (st->discard != AVDISCARD_ALL) {
if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
sc->ffindex, sample->pos);
return AVERROR_INVALIDDATA;
}
ret = av_get_packet(sc->pb, pkt, sample->size);
if (ret < 0)
return ret;
if (sc->has_palette) {
uint8_t *pal;
pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
if (!pal) {
av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
} else {
memcpy(pal, sc->palette, AVPALETTE_SIZE);
sc->has_palette = 0;
}
}
#if CONFIG_DV_DEMUXER
if (mov->dv_demux && sc->dv_audio_container) {
avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
av_freep(&pkt->data);
pkt->size = 0;
ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
if (ret < 0)
return ret;
}
#endif
}
pkt->stream_index = sc->ffindex;
pkt->dts = sample->timestamp;
if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
/* update ctts context */
sc->ctts_sample++;
if (sc->ctts_index < sc->ctts_count &&
sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
sc->ctts_index++;
sc->ctts_sample = 0;
}
if (sc->wrong_dts)
pkt->dts = AV_NOPTS_VALUE;
} else {
int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
st->index_entries[sc->current_sample].timestamp : st->duration;
pkt->duration = next_dts - pkt->dts;
pkt->pts = pkt->dts;
}
if (st->discard == AVDISCARD_ALL)
goto retry;
pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
pkt->pos = sample->pos;
av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
return 0;
}
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
{
MOVStreamContext *sc = st->priv_data;
int sample, time_sample;
int i;
sample = av_index_search_timestamp(st, timestamp, flags);
av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
sample = 0;
if (sample < 0) /* not sure what to do */
return AVERROR_INVALIDDATA;
sc->current_sample = sample;
av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
/* adjust ctts index */
if (sc->ctts_data) {
time_sample = 0;
for (i = 0; i < sc->ctts_count; i++) {
int next = time_sample + sc->ctts_data[i].count;
if (next > sc->current_sample) {
sc->ctts_index = i;
sc->ctts_sample = sc->current_sample - time_sample;
break;
}
time_sample = next;
}
}
return sample;
}
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
{
AVStream *st;
int64_t seek_timestamp, timestamp;
int sample;
int i;
if (stream_index >= s->nb_streams)
return AVERROR_INVALIDDATA;
st = s->streams[stream_index];
sample = mov_seek_stream(s, st, sample_time, flags);
if (sample < 0)
return sample;
/* adjust seek timestamp to found sample timestamp */
seek_timestamp = st->index_entries[sample].timestamp;
for (i = 0; i < s->nb_streams; i++) {
MOVStreamContext *sc = s->streams[i]->priv_data;
st = s->streams[i];
st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
if (stream_index == i)
continue;
timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
mov_seek_stream(s, st, timestamp, flags);
}
return 0;
}
#define OFFSET(x) offsetof(MOVContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption mov_options[] = {
{"use_absolute_path",
"allow using absolute path when opening alias, this is a possible security issue",
OFFSET(use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
0, 1, FLAGS},
{"ignore_editlist", "", OFFSET(ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
0, 1, FLAGS},
{"use_mfra_for",
"use mfra for fragment timestamps",
OFFSET(use_mfra_for), FF_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
-1, FF_MOV_FLAG_MFRA_PTS, FLAGS,
"use_mfra_for"},
{"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
FLAGS, "use_mfra_for" },
{"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
FLAGS, "use_mfra_for" },
{"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_PTS}, 0, 0,
FLAGS, "use_mfra_for" },
{ "export_all", "Export unrecognized metadata entries", OFFSET(export_all),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = FLAGS },
{ "export_xmp", "Export full XMP metadata", OFFSET(export_xmp),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = FLAGS },
{ NULL },
};
static const AVClass mov_class = {
.class_name = "mov,mp4,m4a,3gp,3g2,mj2",
.item_name = av_default_item_name,
.option = mov_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_mov_demuxer = {
.name = "mov,mp4,m4a,3gp,3g2,mj2",
.long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
.priv_class = &mov_class,
.priv_data_size = sizeof(MOVContext),
.extensions = "mov,mp4,m4a,3gp,3g2,mj2",
.read_probe = mov_probe,
.read_header = mov_read_header,
.read_packet = mov_read_packet,
.read_close = mov_read_close,
.read_seek = mov_read_seek,
.flags = AVFMT_NO_BYTE_SEEK,
};
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