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support mov reference files, ref.mov/ref.m2v/ref.wav and detect BrianCox.mov 

Originally committed as revision 12241 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2008-02-26 18:21:58 +00:00
parent 94ae6788e2
commit 221e21b70d
1 changed files with 97 additions and 6 deletions
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103
libavformat/mov.c
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@ -69,6 +69,11 @@ typedef struct {
int id;
} MOV_stsc_t;
typedef struct {
uint32_t type;
char *path;
} MOV_dref_t;
typedef struct {
uint32_t type;
int64_t offset;
@ -78,6 +83,7 @@ typedef struct {
struct MOVParseTableEntry;
typedef struct MOVStreamContext {
ByteIOContext *pb;
int ffindex; /* the ffmpeg stream id */
int next_chunk;
unsigned int chunk_count;
@ -104,6 +110,9 @@ typedef struct MOVStreamContext {
int dv_audio_container;
int pseudo_stream_id;
int16_t audio_cid; ///< stsd audio compression id
unsigned drefs_count;
MOV_dref_t *drefs;
int dref_id;
} MOVStreamContext;
typedef struct MOVContext {
@ -200,6 +209,71 @@ static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
return err;
}
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
MOVStreamContext *sc = st->priv_data;
int entries, i, j;
get_be32(pb); // version + flags
entries = get_be32(pb);
if (entries >= UINT_MAX / sizeof(*sc->drefs))
return -1;
sc->drefs_count = entries;
sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
for (i = 0; i < sc->drefs_count; i++) {
MOV_dref_t *dref = &sc->drefs[i];
uint32_t size = get_be32(pb);
offset_t next = url_ftell(pb) + size - 4;
dref->type = get_le32(pb);
get_be32(pb); // version + flags
dprintf(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;
char volume[28];
int16_t type;
url_fskip(pb, 10);
volume_len = get_byte(pb);
volume_len = FFMIN(volume_len, 27);
get_buffer(pb, volume, 27);
volume[volume_len] = 0;
av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
url_fskip(pb, 112);
for (type = 0; type != -1 && url_ftell(pb) < next; ) {
type = get_be16(pb);
len = get_be16(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
dref->path = av_mallocz(len+1);
get_buffer(pb, dref->path, len);
if (!strncmp(dref->path, 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
url_fskip(pb, len);
}
}
url_fseek(pb, next, SEEK_SET);
}
return 0;
}
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
{
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
@ -574,6 +648,7 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { //Parsing Sample description table
enum CodecID id;
int dref_id;
MOV_atom_t a = { 0, 0, 0 };
offset_t start_pos = url_ftell(pb);
int size = get_be32(pb); /* size */
@ -581,7 +656,7 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
get_be32(pb); /* reserved */
get_be16(pb); /* reserved */
get_be16(pb); /* index */
dref_id = get_be16(pb);
if (st->codec->codec_tag &&
(c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
@ -594,6 +669,7 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
continue;
}
sc->pseudo_stream_id= pseudo_stream_id;
sc->dref_id= dref_id;
st->codec->codec_tag = format;
id = codec_get_id(codec_movaudio_tags, format);
@ -1217,6 +1293,8 @@ static const MOVParseTableEntry mov_default_parse_table[] = {
/* mp4 atoms */
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
{ MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default },
{ 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 },
@ -1451,6 +1529,13 @@ static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
sc->ffindex = i;
mov_build_index(mov, st);
if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
av_log(s, AV_LOG_ERROR, "stream %d, error opening external essence: %s\n",
st->index, strerror(errno));
} else
sc->pb = s->pb;
switch (st->codec->codec_id) {
#ifdef CONFIG_H261_DECODER
case CODEC_ID_H261:
@ -1499,15 +1584,16 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *msc = st->priv_data;
if (st->discard != AVDISCARD_ALL && msc->current_sample < msc->sample_count) {
if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
AV_TIME_BASE, msc->time_scale);
dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
(!url_is_streamed(s->pb) &&
((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)))) {
(FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
sample = current_sample;
best_dts = dts;
sc = msc;
@ -1518,12 +1604,12 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
return -1;
/* must be done just before reading, to avoid infinite loop on sample */
sc->current_sample++;
if (url_fseek(s->pb, sample->pos, SEEK_SET) != sample->pos) {
if (url_fseek(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 -1;
}
av_get_packet(s->pb, pkt, sample->size);
av_get_packet(sc->pb, pkt, sample->size);
#ifdef CONFIG_DV_DEMUXER
if (mov->dv_demux && sc->dv_audio_container) {
dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
@ -1614,11 +1700,16 @@ static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti
static int mov_read_close(AVFormatContext *s)
{
int i;
int i, j;
MOVContext *mov = s->priv_data;
for(i=0; i<s->nb_streams; i++) {
MOVStreamContext *sc = s->streams[i]->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);
if (sc->pb && sc->pb != s->pb)
url_fclose(sc->pb);
}
if(mov->dv_demux){
for(i=0; i<mov->dv_fctx->nb_streams; i++){