1 files changed, 33 insertions, 38 deletions

diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index c799ce5205..655da35dd4 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -193,18 +193,17 @@ 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;
-    uint32_t seq;
-    uint32_t crc;
     int size, idx;
     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;
@@ -216,23 +215,22 @@ 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);
     serial = avio_rl32 (bc);
-    seq = avio_rl32 (bc);
-    crc = avio_rl32 (bc);
+    avio_skip(bc, 8); /* seq, crc */
     nsegs = avio_r8(bc);
 
     idx = ogg_find_stream (ogg, serial);
@@ -251,7 +249,7 @@ 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 +258,9 @@ 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 +291,9 @@ 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;
@@ -309,35 +309,32 @@ 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;
 
-#if 0
-    av_log (s, AV_LOG_DEBUG, "ogg_packet: curidx=%i\n", ogg->curidx);
-#endif
+    av_dlog(s, "ogg_packet: curidx=%i\n", ogg->curidx);
 
     do{
         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;
 
-#if 0
-        av_log (s, AV_LOG_DEBUG,
-                "ogg_packet: idx=%d pstart=%d psize=%d segp=%d nsegs=%d\n",
+        av_dlog(s, "ogg_packet: idx=%d pstart=%d psize=%d segp=%d nsegs=%d\n",
                 idx, os->pstart, os->psize, os->segp, os->nsegs);
-#endif
 
         if (!os->codec){
             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;
                 }
@@ -364,11 +361,6 @@ static int ogg_packet(AVFormatContext *s, int *str, int *dstart, int *dsize,
         }
     }while (!complete);
 
-#if 0
-    av_log (s, AV_LOG_DEBUG,
-            "ogg_packet: idx %i, frame size %i, start %i\n",
-            idx, os->psize, os->pstart);
-#endif
 
     if (os->granule == -1)
         av_log(s, AV_LOG_WARNING, "Page at %"PRId64" is missing granule\n", os->page_pos);
@@ -418,6 +410,8 @@ static int ogg_packet(AVFormatContext *s, int *str, int *dstart, int *dsize,
             *fpos = os->sync_pos;
         os->pstart += os->psize;
         os->psize = 0;
+        if(os->pstart == os->bufpos)
+            os->bufpos = os->pstart = 0;
         os->sync_pos = os->page_pos;
     }
 
@@ -439,15 +433,15 @@ 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
-    av_log (s, AV_LOG_DEBUG, "found headers\n");
-#endif
+    av_dlog(s, "found headers\n");
 
     return 0;
 }
@@ -503,11 +497,12 @@ 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++)