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Ogg demuxer: give meaningful error codes and warnings.

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Signed-off-by: Nicolas George <nicolas.george@normalesup.org>
This commit is contained in:
Nicolas George 2011-04-15 17:08:12 +02:00
parent 34b92dbd94
commit bec994dff2
1 changed files with 27 additions and 19 deletions
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46
libavformat/oggdec.c
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@ -193,7 +193,7 @@ static int ogg_read_page(AVFormatContext *s, int *str)
AVIOContext *bc = s->pb;
struct ogg *ogg = s->priv_data;
struct ogg_stream *os;
int i = 0;
int ret, i = 0;
int flags, nsegs;
uint64_t gp;
uint32_t serial;
@ -203,8 +203,9 @@ static int ogg_read_page(AVFormatContext *s, int *str)
uint8_t sync[4];
int sp = 0;
if (avio_read (bc, sync, 4) < 4)
return -1;
ret = avio_read (bc, sync, 4);
if (ret < 4)
return ret < 0 ? ret : AVERROR_EOF;
do{
int c;
@ -216,17 +217,17 @@ static int ogg_read_page(AVFormatContext *s, int *str)
c = avio_r8(bc);
if (url_feof(bc))
return -1;
return AVERROR_EOF;
sync[sp++ & 3] = c;
}while (i++ < MAX_PAGE_SIZE);
if (i >= MAX_PAGE_SIZE){
av_log (s, AV_LOG_INFO, "ogg, can't find sync word\n");
return -1;
return AVERROR_INVALIDDATA;
}
if (avio_r8(bc) != 0) /* version */
return -1;
return AVERROR_INVALIDDATA;
flags = avio_r8(bc);
gp = avio_rl64 (bc);
@ -251,7 +252,7 @@ static int ogg_read_page(AVFormatContext *s, int *str)
idx = ogg_new_stream(s, serial, 1);
}
if (idx < 0)
return -1;
return idx;
}
os = ogg->streams + idx;
@ -260,8 +261,9 @@ static int ogg_read_page(AVFormatContext *s, int *str)
if(os->psize > 0)
ogg_new_buf(ogg, idx);
if (avio_read (bc, os->segments, nsegs) < nsegs)
return -1;
ret = avio_read (bc, os->segments, nsegs);
if (ret < nsegs)
return ret < 0 ? ret : AVERROR_EOF;
os->nsegs = nsegs;
os->segp = 0;
@ -292,8 +294,9 @@ static int ogg_read_page(AVFormatContext *s, int *str)
os->buf = nb;
}
if (avio_read (bc, os->buf + os->bufpos, size) < size)
return -1;
ret = avio_read (bc, os->buf + os->bufpos, size);
if (ret < size)
return ret < 0 ? ret : AVERROR_EOF;
os->bufpos += size;
os->granule = gp;
@ -309,7 +312,7 @@ static int ogg_packet(AVFormatContext *s, int *str, int *dstart, int *dsize,
int64_t *fpos)
{
struct ogg *ogg = s->priv_data;
int idx, i;
int idx, i, ret;
struct ogg_stream *os;
int complete = 0;
int segp = 0, psize = 0;
@ -322,8 +325,9 @@ static int ogg_packet(AVFormatContext *s, int *str, int *dstart, int *dsize,
idx = ogg->curidx;
while (idx < 0){
if (ogg_read_page (s, &idx) < 0)
return -1;
ret = ogg_read_page (s, &idx);
if (ret < 0)
return ret;
}
os = ogg->streams + idx;
@ -338,6 +342,7 @@ static int ogg_packet(AVFormatContext *s, int *str, int *dstart, int *dsize,
if (os->header < 0){
os->codec = ogg_find_codec (os->buf, os->bufpos);
if (!os->codec){
av_log(s, AV_LOG_WARNING, "Codec not found\n");
os->header = 0;
return 0;
}
@ -439,10 +444,12 @@ static int ogg_packet(AVFormatContext *s, int *str, int *dstart, int *dsize,
static int ogg_get_headers(AVFormatContext *s)
{
struct ogg *ogg = s->priv_data;
int ret;
do{
if (ogg_packet (s, NULL, NULL, NULL, NULL) < 0)
return -1;
ret = ogg_packet (s, NULL, NULL, NULL, NULL);
if (ret < 0)
return ret;
}while (!ogg->headers);
#if 0
@ -503,11 +510,12 @@ static int ogg_get_length(AVFormatContext *s)
static int ogg_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
struct ogg *ogg = s->priv_data;
int i;
int ret, i;
ogg->curidx = -1;
//linear headers seek from start
if (ogg_get_headers (s) < 0){
return -1;
ret = ogg_get_headers (s);
if (ret < 0){
return ret;
}
for (i = 0; i < ogg->nstreams; i++)