/amffmpeg/libavformat/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>
 *
 * 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 <limits.h>

//#define DEBUG
//#define MOV_EXPORT_ALL_METADATA

#include "libavutil/intreadwrite.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "avformat.h"
#include "avio_internal.h"
#include "riff.h"
#include "isom.h"
#include "libavcodec/get_bits.h"

#if CONFIG_ZLIB
#include <zlib.h>
#endif

/*
 * First version by Francois Revol revol@free.fr
 * Seek function by Gael Chardon gael.dev@4now.net
 *
 * Features and limitations:
 * - reads most of the QT files I have (at least the structure),
 *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
 * - the code is quite ugly... maybe I won't do it recursive next time :-)
 *
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
 * when coding this :) (it's a writer anyway)
 *
 * Reference documents:
 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
 * Apple:
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
 * QuickTime is a trademark of Apple (AFAIK :))
 */

#include "qtpalette.h"


#undef NDEBUG
#include <assert.h>

/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */

/* those functions parse an atom */
/* return code:
  0: continue to parse next atom
 <0: error occurred, exit
*/
/* links atom IDs to parse functions */
typedef struct MOVParseTableEntry {
    uint32_t type;
    int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
} MOVParseTableEntry;

static const MOVParseTableEntry mov_default_parse_table[];
#define MAX_READ_SEEK (1024*1024*3-32*1024)//DEF_MAX_READ_SEEK-block_read_size

static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb, unsigned len, const char *type)
{
    char buf[16];

    avio_rb16(pb); // unknown
    snprintf(buf, sizeof(buf), "%d", avio_rb16(pb));
    av_dict_set(&c->fc->metadata, type, buf, 0);

    avio_rb16(pb); // total tracks/discs

    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
            PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
    }
    *p = 0;
    return p - dst;
}

static int mov_extract_cover_pic(AVFormatContext *s, AVIOContext *pb, int type, int size, char *value)
{
    if(s->cover_data){
        av_log(s, AV_LOG_INFO, "Extract cover picture in other atom!\n");
        return 0;
    }

    s->cover_data = av_malloc(size);
    if(!s->cover_data){
        av_log(s, AV_LOG_INFO, "no memery, av_alloc failed!\n");
	 return -1;
    }
    s->cover_data_len = size;
    avio_read(pb, s->cover_data, size);

    if (type == 13)
        strcpy(value, "image/jpeg");  // jpeg
    else if (type == 14)
        strcpy(value, "image/png");   // png

    return 0;
}

static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
#ifdef MOV_EXPORT_ALL_METADATA
    char tmp_key[5];
#endif
    char str[1024], key2[16], language[4] = {0};
    const char *key = NULL;
    uint16_t str_size, langcode = 0;
    uint32_t cover_size = 0;
    uint32_t data_type = 0;
    int (*parse)(MOVContext*, AVIOContext*, unsigned, const char *) = NULL;

    switch (atom.type) {
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
    case MKTAG(0xa9,'a','u','t'):
    case MKTAG(0xa9,'A','R','T'): key = "artist";    break;
    case MKTAG( 'a','A','R','T'): key = "album_artist";break;
    case MKTAG(0xa9,'w','r','t'): key = "composer";  break;
    case MKTAG( 'c','p','r','t'):
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
    case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
    case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
    case MKTAG(0xa9,'c','m','t'):
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
    case MKTAG(0xa9,'d','a','y'): key = "date";      break;
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
    case MKTAG(0xa9,'t','o','o'):
    case MKTAG(0xa9,'s','w','r'): key = "encoder";   break;
    case MKTAG(0xa9,'e','n','c'): key = "encoder";   break;
    case MKTAG( 'd','e','s','c'): key = "description";break;
    case MKTAG( 'l','d','e','s'): key = "synopsis";  break;
    case MKTAG( 't','v','s','h'): key = "show";      break;
    case MKTAG( 't','v','e','n'): key = "episode_id";break;
    case MKTAG( 't','v','n','n'): key = "network";   break;
    case MKTAG( 't','r','k','n'): key = "track";
        parse = mov_metadata_track_or_disc_number; break;
    case MKTAG( 'd','i','s','k'): key = "disc";
        parse = mov_metadata_track_or_disc_number; break;
    case MKTAG( 'c','o','v','r'): key = "cover_pic"; break;
    case MKTAG(0xa9,'x','y','z'): key = "GPSCoordinates"; 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;
	     cover_size = data_size -16;
            atom.size -= 16;
        } else return 0;
    } else if (atom.size > 4 && key && !c->itunes_metadata) {
        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;

#ifdef MOV_EXPORT_ALL_METADATA
    if (!key) {
        snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
        key = tmp_key;
    }
#endif

    if (!key)
        return 0;
    if (atom.size < 0)
        return -1;

    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);

    if (parse)
        parse(c, pb, str_size, key);
    else {
        if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
            mov_read_mac_string(c, pb, str_size, str, sizeof(str));
        } else if (data_type == 13 || data_type == 14){
            mov_extract_cover_pic(c->fc, pb, data_type, cover_size, str);
        } else {
            avio_read(pb, str, str_size);
            str[str_size] = 0;
        }
        // Android MP4 writer put an additional '/' at the end, discard it.
        // The CTS test seems the added '/' is not needed.
        if ((atom.type == MKTAG(0xa9,'x','y','z')) && (str[str_size-1] == 0x2f)) {
            str[str_size-1] = 0;
        }
        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, atom.size);

    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;
        ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
    }
    return 0;
}

static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
    int64_t total_size = 0;
    MOVAtom a;
    int i;
	int searchtag = 0;/*found a error tag,changed to search mod*/
	int serachenable = (atom.type==MKTAG('r','o','o','t'));
	
    if (atom.size < 0)
        atom.size = INT64_MAX;
    while (total_size + 8 < atom.size && !url_feof(pb) && !url_interrupt_cb()) {
        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);
        }
        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);
		//av_log(c->fc, AV_LOG_INFO, "type: %08x '%.4s' offset=%llx aize=%llx atome.size=%llx total_size=%llx\n", a.type, (char*)&a.type,avio_tell(pb), a.size, atom.size, total_size);
        total_size += 8;
        if (a.size == 1) { /* 64 bit extended size */
            a.size = avio_rb64(pb) - 8;
            total_size += 8;
        }
        if (a.size == 0) {			
			a.size = atom.size - total_size;
            if (a.size <= 8){
				av_log(c->fc, AV_LOG_INFO, "L%d: a.size (%x)<8, break!\n", __LINE__, a.size);
                break;
            }
        }
        a.size -= 8;
		if (!c->found_moov && (a.size > atom.size - total_size)) {
			if (!searchtag) {
				searchtag = serachenable;
				//av_log(c->fc, AV_LOG_INFO, "******set search mode************\n");
			}
            continue;
		}
		
        if(a.size < 0){
			av_log(c->fc, AV_LOG_INFO, "L%d: a.size (%x)<8, break!\n", __LINE__, a.size);
            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;
				if (searchtag) {
					searchtag = 0;/*exit serach mode*/
					//av_log(c->fc, AV_LOG_INFO, "******exit search mode************\n");
				}
                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 */	
			if(!searchtag)
            	avio_skip(pb, a.size);
			else
				continue;
        } else {
            int64_t start_pos = avio_tell(pb);
            int64_t left;
            int err = parse(c, pb, a);
            if (err < 0)
                return err;			
            if (c->found_moov && c->found_mdat &&
                (!pb->seekable  ||pb->is_slowmedia  ||pb->is_streamed|| start_pos + a.size == avio_size(pb)))
                return 0;/*can't seek,slowmedia,streamed all don't do else parser now*/
            left = a.size - avio_tell(pb) + start_pos;
            if (left > 0){ /* skip garbage at atom end */
                avio_skip(pb, left);
            }
        }

        total_size += a.size;
    }

    if (total_size < atom.size && atom.size < 0x7ffff)
        avio_skip(pb, atom.size - total_size);
   if (url_interrupt_cb()) {
        av_log(NULL, AV_LOG_WARNING, "mov_read_default interrupt, exit\n");
        return AVERROR_EXIT;
    }
    return 0;
}

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 >= UINT_MAX / sizeof(*sc->drefs))
        return -1;
    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 -1;

        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; ) {
                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);
                    avio_read(pb, dref->dir, len);
                    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;

    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 = CODEC_ID_MP2;
    else if(type == MKTAG('s','u','b','p'))
        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;

    avio_rb32(pb); /* component  manufacture */
    avio_rb32(pb); /* component flags */
    avio_rb32(pb); /* component flags mask */

    return 0;
}

int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
{
    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) {
        avio_rb16(pb); /* ID */
        avio_r8(pb); /* priority */
    } 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, atom);
}

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->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_wfex(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];

    ff_get_wav_header(pb, st->codec, atom.size);

    return 0;
}

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;
    /*
    * Lujian.Hu 2012-12-14
    * only use media_dataoffset to time_search(player_av.c) can not work correctly, because in mov_read_seek not only modify the pos to 
    * media data offset but reset the sample pointer to the correct position according to the very timestamp
    */
    //c->fc->media_dataoffset = url_ftell(pb); 
    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 minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
    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 */
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
    av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);

    comp_brand_size = atom.size - 8;
    if (comp_brand_size < 0)
        return -1;
    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)
{
    if (mov_read_default(c, pb, atom) < 0)
        return -1;
    /* 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)
{
    c->fragment.moof_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, time_t time)
{
    char buffer[32];
    if (time) {
        struct tm *ptm;
        time -= 2082844800;  /* seconds between 1904-01-01 and Epoch */
        ptm = gmtime(&time);
        if (!ptm) return;
        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;
    time_t creation_time;

    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);
    if (version > 1)
        return -1; /* unsupported */

    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)
{
    time_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 */
    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_smi(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 -1;

    // currently SVQ3 decoder expect full STSD header - so let's fake it
    // this should be fixed and just SMI header should be passed
    av_free(st->codec->extradata);
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
    if (!st->codec->extradata)
        return AVERROR(ENOMEM);
    st->codec->extradata_size = 0x5a + atom.size;
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
    avio_read(pb, st->codec->extradata + 0x5a, atom.size);
    av_dlog(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
    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 CODEC_ID_PCM_S24BE:
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
            break;
        case CODEC_ID_PCM_S32BE:
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
            break;
        case CODEC_ID_PCM_F32BE:
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
            break;
        case CODEC_ID_PCM_F64BE:
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
            break;
        default:
            break;
        }
    }
    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)
{
    AVStream *st;
    uint64_t size;
    uint8_t *buf;

    if (c->fc->nb_streams < 1) // will happen with jp2 files
        return 0;
    st= c->fc->streams[c->fc->nb_streams-1];
    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 -1;
    buf= av_realloc(st->codec->extradata, size);
    if(!buf)
        return -1;
    st->codec->extradata= buf;
    buf+= 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);
    avio_read(pb, buf + 8, atom.size);
    return 0;
}

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 -1;

    if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) {
        // pass all frma atom to codec, needed at least for QDMC and QDM2
        av_free(st->codec->extradata);
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
        if (!st->codec->extradata)
            return AVERROR(ENOMEM);
        st->codec->extradata_size = atom.size;
        avio_read(pb, st->codec->extradata, atom.size);
    } else if (atom.size > 8) { /* to read frma, esds atoms */
        if (mov_read_default(c, pb, atom) < 0)
            return -1;
    } 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 -1;

    av_free(st->codec->extradata);
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
    if (!st->codec->extradata)
        return AVERROR(ENOMEM);
    st->codec->extradata_size = atom.size;
    avio_read(pb, st->codec->extradata, atom.size);
    return 0;
}

/**
 * An mvcC atom contains the necessary information about the multiview data for
 * 3D content. This function reads atom content and puts data in extradata.
 */
static int mov_read_mvcC(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];
    st->codec->codec_id = CODEC_ID_H264MVC;

    return mov_read_glbl(c, pb, atom);
}

/**
 * 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 -1;

    av_free(st->codec->extradata);
    st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
    if (!st->codec->extradata)
        return AVERROR(ENOMEM);
    st->codec->extradata_size = atom.size - 40;
    avio_skip(pb, 40);
    avio_read(pb, st->codec->extradata, atom.size - 40);
    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 >= UINT_MAX/sizeof(int64_t))
        return -1;

    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
    if (!sc->chunk_offsets)
        return AVERROR(ENOMEM);
    sc->chunk_count = entries;

    if      (atom.type == MKTAG('s','t','c','o'))
        for(i=0; i<entries; i++)
            sc->chunk_offsets[i] = avio_rb32(pb);
    else if (atom.type == MKTAG('c','o','6','4'))
        for(i=0; i<entries; i++)
            sc->chunk_offsets[i] = avio_rb64(pb);
    else
        return -1;

    return 0;
}

/**
 * Compute codec id for 'lpcm' tag.
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
 */
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
{
    if (flags & 1) { // floating point
        if (flags & 2) { // big endian
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
        } else {
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
        }
    } else {
        if (flags & 2) {
            if      (bps == 8)
                // signed integer
                if (flags & 4)  return CODEC_ID_PCM_S8;
                else            return CODEC_ID_PCM_U8;
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
        } else {
            if      (bps == 8)
                if (flags & 4)  return CODEC_ID_PCM_S8;
                else            return CODEC_ID_PCM_U8;
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
        }
    }
    return CODEC_ID_NONE;
}

int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
{
    AVStream *st;
    MOVStreamContext *sc;
    int j, 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; pseudo_stream_id++) {
        //Parsing Sample description table
        enum CodecID id;
        int dref_id = 1;
        MOVAtom a = { AV_RL32("stsd") };
        int64_t start_pos = avio_tell(pb);
        int 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);
        }

        if (st->codec->codec_tag &&
            st->codec->codec_tag != format &&
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
                                   : st->codec->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. */
        multiple_stsd:
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
            avio_skip(pb, size - (avio_tell(pb) - start_pos));
            continue;
        }
        /* we cannot demux concatenated h264 streams because of different extradata */
        if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
            goto multiple_stsd;
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
        sc->dref_id= dref_id;

        st->codec->codec_tag = format;
        id = ff_codec_get_id(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 && /* do not overwrite codec type */
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
            id = ff_codec_get_id(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){
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
                if(id > 0)
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
            }
        }

        av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
                (format >> 24) & 0xff, st->codec->codec_type);

        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
            unsigned int color_depth, len;
            int color_greyscale;

            if ((id != CODEC_ID_H264) || (st->codec->codec_id != CODEC_ID_H264MVC)) {
                st->codec->codec_id = id;
            } else {
                st->codec->codec_tag = CODEC_ID_H264MVC;
                av_dlog(c->fc, "code_tag set to MVC with mvcC tag\n");
            }
            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, st->codec->codec_name, 32);
            if (len < 31)
                avio_skip(pb, 31 - len);
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');

            st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
            st->codec->color_table_id = avio_rb16(pb); /* colortable id */
            av_dlog(c->fc, "depth %d, ctab id %d\n",
                   st->codec->bits_per_coded_sample, st->codec->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;

            /* 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 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] =
                            (r << 16) | (g << 8) | (b);
                        color_index -= color_dec;
                        if (color_index < 0)
                            color_index = 0;
                    }
                } else if (st->codec->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] =
                            (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 R, G, or B component is 16 bits;
                             * only use the top 8 bits; skip alpha bytes
                             * up front */
                            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] =
                                (r << 16) | (g << 8) | (b);
                        }
                    }
                }
                sc->has_palette = 1;
            }
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
            int bits_per_sample, flags;
            uint16_t version = avio_rb16(pb);

            st->codec->codec_id = id;
            avio_rb16(pb); /* revision level */
            avio_rb32(pb); /* vendor */

            st->codec->channels = avio_rb16(pb);             /* channel count */
            av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
            st->codec->bits_per_coded_sample = avio_rb16(pb);      /* sample size */

            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) {
                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_int2dbl(avio_rb64(pb)); /* float 64 */
                    st->codec->channels = avio_rb32(pb);
                    avio_rb32(pb); /* always 0x7F000000 */
                    st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
                    flags = avio_rb32(pb); /* lpcm format specific flag */
                    sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
                    sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
                    if (format == 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 CODEC_ID_PCM_S8:
            case CODEC_ID_PCM_U8:
                if (st->codec->bits_per_coded_sample == 16)
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
                break;
            case CODEC_ID_PCM_S16LE:
            case CODEC_ID_PCM_S16BE:
                if (st->codec->bits_per_coded_sample == 8)
                    st->codec->codec_id = CODEC_ID_PCM_S8;
                else if (st->codec->bits_per_coded_sample == 24)
                    st->codec->codec_id =
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
                break;
            /* set values for old format before stsd version 1 appeared */
            case CODEC_ID_MACE3:
                sc->samples_per_frame = 6;
                sc->bytes_per_frame = 2*st->codec->channels;
                break;
            case CODEC_ID_MACE6:
                sc->samples_per_frame = 6;
                sc->bytes_per_frame = 1*st->codec->channels;
                break;
            case CODEC_ID_ADPCM_IMA_QT:
                sc->samples_per_frame = 64;
                sc->bytes_per_frame = 34*st->codec->channels;
                break;
            case 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;
            }
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
            // ttxt stsd contains display flags, justification, background
            // color, fonts, and default styles, so fake an atom to read it
            MOVAtom fake_atom = { .size = size - (avio_tell(pb) - start_pos) };
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
                mov_read_glbl(c, pb, fake_atom);
            st->codec->codec_id= id;
            st->codec->width = sc->width;
            st->codec->height = sc->height;
        } else {
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
            avio_skip(pb, size - (avio_tell(pb) - start_pos));
        }
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
        a.size = size - (avio_tell(pb) - start_pos);
        if (a.size > 8) {
            if (mov_read_default(c, pb, a) < 0)
                return -1;
        } else if (a.size > 0)
            avio_skip(pb, a.size);
    }

    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && 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 CODEC_ID_DVAUDIO:
        c->dv_fctx = avformat_alloc_context();
        c->dv_demux = dv_init_demux(c->dv_fctx);
        if (!c->dv_demux) {
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
            return -1;
        }
        sc->dv_audio_container = 1;
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
        break;
#endif
    /* no ifdef since parameters are always those */
    case CODEC_ID_QCELP:
        // 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;
        st->codec->frame_size= 160;
        st->codec->channels= 1; /* really needed */
        break;
    case CODEC_ID_AMR_NB:
    case CODEC_ID_AMR_WB:
        st->codec->frame_size= sc->samples_per_frame;
        st->codec->channels= 1; /* really needed */
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
            st->codec->sample_rate = 8000;
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
            st->codec->sample_rate = 16000;
        break;
    case CODEC_ID_MP2:
    case CODEC_ID_MP3:
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
        st->need_parsing = AVSTREAM_PARSE_FULL;
        break;
    case CODEC_ID_GSM:
    case CODEC_ID_ADPCM_MS:
    case CODEC_ID_ADPCM_IMA_WAV:
        st->codec->frame_size = sc->samples_per_frame;
        st->codec->block_align = sc->bytes_per_frame;
        break;
    case CODEC_ID_ALAC:
        if (st->codec->extradata_size == 36) {
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
            st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
        }
        break;
    default:
        break;
    }

    return 0;
}

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 >= UINT_MAX / sizeof(*sc->stsc_data))
        return -1;
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
    if (!sc->stsc_data)
        return AVERROR(ENOMEM);
    sc->stsc_count = entries;

    for(i=0; i<entries; 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);
    }
    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 (entries >= UINT_MAX / sizeof(*sc->stps_data))
        return -1;
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
    if (!sc->stps_data)
        return AVERROR(ENOMEM);
    sc->stps_count = entries;

    for (i = 0; i < entries; i++) {
        sc->stps_data[i] = avio_rb32(pb);
        //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
    }

    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 >= UINT_MAX / sizeof(int))
      …