forked from FFmpeg/FFmpeg
/
mov.c
5588 lines (4871 loc) · 187 KB
/
mov.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/internal.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/aes.h"
#include "libavutil/aes_ctr.h"
#include "libavutil/sha.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"
/* 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;
if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
id = AV_CODEC_ID_PNG;
} else {
id = AV_CODEC_ID_MJPEG;
}
}
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->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = id;
return 0;
}
// 3GPP TS 26.244
static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
{
char language[4] = { 0 };
char buf[200], place[100];
uint16_t langcode = 0;
double longitude, latitude, altitude;
const char *key = "location";
if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
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, place, sizeof(place));
if (len < 1) {
av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 1); // role
len -= 1;
if (len < 12) {
av_log(c->fc, AV_LOG_ERROR,
"loci too short (%u bytes left, need at least %d)\n", len, 12);
return AVERROR_INVALIDDATA;
}
longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
altitude = ((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 (altitude)
av_strlcatf(buf, sizeof(buf), "%+f", altitude);
av_strlcatf(buf, sizeof(buf), "/%s", place);
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;
int num = 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;
}
retry:
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_size <= atom.size) {
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 if (!key && c->found_hdlr_mdta && c->meta_keys) {
uint32_t index = AV_RB32(&atom.type);
if (index < c->meta_keys_count) {
key = c->meta_keys[index];
} else {
av_log(c->fc, AV_LOG_WARNING,
"The index of 'data' is out of range: %d >= %d.\n",
index, c->meta_keys_count);
}
}
} else return 0;
} else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
str_size = avio_rb16(pb); // string length
if (str_size > atom.size) {
raw = 1;
avio_seek(pb, -2, SEEK_CUR);
av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
goto retry;
}
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;
// Allocates enough space if data_type is a int32 or float32 number, otherwise
// worst-case requirement for output string in case of utf8 coded input
num = (data_type >= 21 && data_type <= 23);
str_size_alloc = (num ? 512 : (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 if (data_type == 21) { // BE signed integer, variable size
int val = 0;
if (str_size == 1)
val = (int8_t)avio_r8(pb);
else if (str_size == 2)
val = (int16_t)avio_rb16(pb);
else if (str_size == 3)
val = ((int32_t)(avio_rb24(pb)<<8))>>8;
else if (str_size == 4)
val = (int32_t)avio_rb32(pb);
if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
av_log(c->fc, AV_LOG_ERROR,
"Failed to store the number (%d) in string.\n", val);
av_free(str);
return AVERROR_INVALIDDATA;
}
} else if (data_type == 22) { // BE unsigned integer, variable size
unsigned int val = 0;
if (str_size == 1)
val = avio_r8(pb);
else if (str_size == 2)
val = avio_rb16(pb);
else if (str_size == 3)
val = avio_rb24(pb);
else if (str_size == 4)
val = avio_rb32(pb);
if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
av_log(c->fc, AV_LOG_ERROR,
"Failed to store the number (%u) in string.\n", val);
av_free(str);
return AVERROR_INVALIDDATA;
}
} else if (data_type == 23 && str_size >= 4) { // BE float32
float val = av_int2float(avio_rb32(pb));
if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
av_log(c->fc, AV_LOG_ERROR,
"Failed to store the float32 number (%f) in string.\n", val);
av_free(str);
return AVERROR_INVALIDDATA;
}
} else {
int ret = ffio_read_size(pb, str, str_size);
if (ret < 0) {
av_free(str);
return ret;
}
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);
}
if (!strcmp(key, "encoder")) {
int major, minor, micro;
if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, µ) == 3) {
c->handbrake_version = 1000000*major + 1000*minor + micro;
}
}
}
av_log(c->fc, AV_LOG_TRACE, "lang \"%3s\" ", language);
av_log(c->fc, AV_LOG_TRACE, "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];
int ret;
if (c->ignore_chapters)
return 0;
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;
ret = ffio_read_size(pb, str, str_len);
if (ret < 0)
return ret;
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 ||
entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
entries >= UINT_MAX / sizeof(*sc->drefs))
return AVERROR_INVALIDDATA;
sc->drefs_count = 0;
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 < entries; 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_log(c->fc, AV_LOG_TRACE, "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;
int ret;
avio_skip(pb, 10);
volume_len = avio_r8(pb);
volume_len = FFMIN(volume_len, 27);
ret = ffio_read_size(pb, dref->volume, 27);
if (ret < 0)
return ret;
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);
ret = ffio_read_size(pb, dref->filename, 63);
if (ret < 0)
return ret;
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);
ret = ffio_read_size(pb, dref->path, len);
if (ret < 0) {
av_freep(&dref->path);
return ret;
}
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;
}
// trim string of any ending zeros
for (j = len - 1; j >= 0; j--) {
if (dref->path[j] == 0)
len--;
else
break;
}
for (j = 0; j < len; j++)
if (dref->path[j] == ':' || dref->path[j] == 0)
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);
ret = ffio_read_size(pb, dref->dir, len);
if (ret < 0) {
av_freep(&dref->dir);
return ret;
}
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);
}
} else {
av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x08%x size %d\n",
dref->type, size);
entries--;
i--;
}
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;
int64_t title_size;
char *title_str;
int ret;
avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
/* component type */
ctype = avio_rl32(pb);
type = avio_rl32(pb); /* component subtype */
av_log(c->fc, AV_LOG_TRACE, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
av_log(c->fc, AV_LOG_TRACE, "stype= %.4s\n", (char*)&type);
if (c->trak_index < 0) { // meta not inside a trak
if (type == MKTAG('m','d','t','a')) {
c->found_hdlr_mdta = 1;
}
return 0;
}
st = c->fc->streams[c->fc->nb_streams-1];
if (type == MKTAG('v','i','d','e'))
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
else if (type == MKTAG('s','o','u','n'))
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
else if (type == MKTAG('m','1','a',' '))
st->codecpar->codec_id = AV_CODEC_ID_MP2;
else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
st->codecpar->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);
ret = ffio_read_size(pb, title_str, title_size);
if (ret < 0) {
av_freep(&title_str);
return ret;
}
title_str[title_size] = 0;
if (title_str[0]) {
int off = (!c->isom && title_str[0] == title_size - 1);
av_dict_set(&st->metadata, "handler_name", title_str + off, 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;
enum AVAudioServiceType *ast;
int ac3info, acmod, lfeon, bsmod;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
sizeof(*ast));
if (!ast)
return AVERROR(ENOMEM);
ac3info = avio_rb24(pb);
bsmod = (ac3info >> 14) & 0x7;
acmod = (ac3info >> 11) & 0x7;
lfeon = (ac3info >> 10) & 0x1;
st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
if (lfeon)
st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
*ast = bsmod;
if (st->codecpar->channels > 1 && bsmod == 0x7)
*ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
#if FF_API_LAVF_AVCTX
FF_DISABLE_DEPRECATION_WARNINGS
st->codec->audio_service_type = *ast;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
return 0;
}
static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
enum AVAudioServiceType *ast;
int eac3info, acmod, lfeon, bsmod;
if (c->fc->nb_streams < 1)
return 0;
st = c->fc->streams[c->fc->nb_streams-1];
ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
sizeof(*ast));
if (!ast)
return AVERROR(ENOMEM);
/* 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->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
if (lfeon)
st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
*ast = bsmod;
if (st->codecpar->channels > 1 && bsmod == 0x7)
*ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
#if FF_API_LAVF_AVCTX
FF_DISABLE_DEPRECATION_WARNINGS
st->codec->audio_service_type = *ast;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
return 0;
}
static int mov_read_ddts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
const uint32_t ddts_size = 20;
AVStream *st = NULL;
uint8_t *buf = NULL;
uint32_t frame_duration_code = 0;
uint32_t channel_layout_code = 0;
GetBitContext gb;
buf = av_malloc(ddts_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!buf) {
return AVERROR(ENOMEM);
}
if (avio_read(pb, buf, ddts_size) < ddts_size) {
av_free(buf);
return AVERROR_INVALIDDATA;
}
init_get_bits(&gb, buf, 8*ddts_size);
if (c->fc->nb_streams < 1) {
return 0;
}
st = c->fc->streams[c->fc->nb_streams-1];
st->codecpar->sample_rate = get_bits_long(&gb, 32);
skip_bits_long(&gb, 32); /* max bitrate */
st->codecpar->bit_rate = get_bits_long(&gb, 32);
st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
frame_duration_code = get_bits(&gb, 2);
skip_bits(&gb, 30); /* various fields */
channel_layout_code = get_bits(&gb, 16);
st->codecpar->frame_size =
(frame_duration_code == 0) ? 512 :
(frame_duration_code == 1) ? 1024 :
(frame_duration_code == 2) ? 2048 :
(frame_duration_code == 3) ? 4096 : 0;
if (channel_layout_code > 0xff) {
av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
}
st->codecpar->channel_layout =
((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
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(c->fc, pb, st->codecpar, 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) {
av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
num, den, 32767);
}
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 */
}
#define DRM_BLOB_SIZE 56
static int mov_read_adrm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
uint8_t intermediate_key[20];
uint8_t intermediate_iv[20];
uint8_t input[64];
uint8_t output[64];
uint8_t file_checksum[20];
uint8_t calculated_checksum[20];
struct AVSHA *sha;
int i;
int ret = 0;
uint8_t *activation_bytes = c->activation_bytes;
uint8_t *fixed_key = c->audible_fixed_key;
c->aax_mode = 1;
sha = av_sha_alloc();
if (!sha)
return AVERROR(ENOMEM);
c->aes_decrypt = av_aes_alloc();
if (!c->aes_decrypt) {
ret = AVERROR(ENOMEM);
goto fail;
}
/* drm blob processing */
avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
avio_read(pb, input, DRM_BLOB_SIZE);
avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
avio_read(pb, file_checksum, 20);
av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
for (i = 0; i < 20; i++)
av_log(sha, AV_LOG_INFO, "%02x", file_checksum[i]);
av_log(c->fc, AV_LOG_INFO, "\n");