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Search relative path according to alias record when opening mov reference files.

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Based on patch by Maksym Veremeyenko, verem at m1stereo dot tv

Originally committed as revision 20539 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-11-15 03:26:47 +00:00
parent b154ed5abe
commit adeb907137
2 changed files with 92 additions and 10 deletions
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4
libavformat/isom.h
View File

@ -56,6 +56,10 @@ typedef struct {
typedef struct {
uint32_t type;
char *path;
char *dir;
char volume[28];
char filename[64];
int16_t nlvl_to, nlvl_from;
} MOVDref;
typedef struct {

98
libavformat/mov.c
View File

@ -274,18 +274,33 @@ static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
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);
get_buffer(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);
url_fskip(pb, 112);
url_fskip(pb, 12);
len = get_byte(pb);
len = FFMIN(len, 63);
get_buffer(pb, dref->filename, 63);
dref->filename[len] = 0;
av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
url_fskip(pb, 16);
/* read next level up_from_alias/down_to_target */
dref->nlvl_from = get_be16(pb);
dref->nlvl_to = get_be16(pb);
av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
dref->nlvl_from, dref->nlvl_to);
url_fskip(pb, 16);
for (type = 0; type != -1 && url_ftell(pb) < next; ) {
type = get_be16(pb);
@ -299,7 +314,7 @@ static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
if (!dref->path)
return AVERROR(ENOMEM);
get_buffer(pb, dref->path, len);
if (len > volume_len && !strncmp(dref->path, volume, volume_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;
@ -308,6 +323,17 @@ static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
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);
get_buffer(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
url_fskip(pb, len);
}
@ -1526,6 +1552,52 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
}
}
static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
{
/* try absolute path */
if (!url_fopen(pb, ref->path, URL_RDONLY))
return 0;
/* try relative path */
if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
char filename[1024];
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) {
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 (!url_fopen(pb, filename, URL_RDONLY))
return 0;
}
}
return AVERROR(ENOENT);
};
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
{
AVStream *st;
@ -1571,9 +1643,13 @@ static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
mov_build_index(c, 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(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
MOVDref *dref = &sc->drefs[sc->dref_id - 1];
if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 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;
@ -2244,8 +2320,10 @@ static int mov_read_close(AVFormatContext *s)
MOVStreamContext *sc = st->priv_data;
av_freep(&sc->ctts_data);
for (j = 0; j < sc->drefs_count; j++)
for (j = 0; j < sc->drefs_count; j++) {
av_freep(&sc->drefs[j].path);
av_freep(&sc->drefs[j].dir);
}
av_freep(&sc->drefs);
if (sc->pb && sc->pb != s->pb)
url_fclose(sc->pb);