Merge remote-tracking branch 'qatar/master'

[ffmpeg] / libavformat / wv.c

diff --git a/libavformat/wv.c b/libavformat/wv.c
index 52ec9264a019bdec5ec85444a4e7f37f98c745a3..e995e51bb90beeb98c1a7f4a54e6543d97e8b618 100644 (file)
--- a/libavformat/wv.c
+++ b/libavformat/wv.c
@@ -21,6 +21,7 @@
 
 #include "libavutil/audioconvert.h"
 #include "libavutil/intreadwrite.h"
+#include "libavutil/dict.h"
 #include "avformat.h"
 #include "apetag.h"
 #include "id3v1.h"
@@ -109,6 +110,9 @@ static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int appen
         size = wc->blksize;
     }
     wc->flags = AV_RL32(wc->extra + 4);
+    // blocks with zero samples don't contain actual audio information and should be ignored
+    if (!AV_RN32(wc->extra))
+        return 0;
     //parse flags
     bpp = ((wc->flags & 3) + 1) << 3;
     chan = 1 + !(wc->flags & WV_MONO);
@@ -206,8 +210,14 @@ static int wv_read_header(AVFormatContext *s,
     AVStream *st;
 
     wc->block_parsed = 0;
-    if(wv_read_block_header(s, pb, 0) < 0)
-        return -1;
+    for(;;){
+        if(wv_read_block_header(s, pb, 0) < 0)
+            return -1;
+        if(!AV_RN32(wc->extra))
+            avio_skip(pb, wc->blksize - 24);
+        else
+            break;
+    }
 
     /* now we are ready: build format streams */
     st = av_new_stream(s, 0);
@@ -226,7 +236,7 @@ static int wv_read_header(AVFormatContext *s,
     if(s->pb->seekable) {
         int64_t cur = avio_tell(s->pb);
         ff_ape_parse_tag(s);
-        if(!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
+        if(!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
             ff_id3v1_read(s);
         avio_seek(s->pb, cur, SEEK_SET);
     }
@@ -240,6 +250,7 @@ static int wv_read_packet(AVFormatContext *s,
     WVContext *wc = s->priv_data;
     int ret;
     int size, ver, off;
+    int64_t pos;
 
     if (url_feof(s->pb))
         return AVERROR(EIO);
@@ -248,6 +259,7 @@ static int wv_read_packet(AVFormatContext *s,
             return -1;
     }
 
+    pos = wc->pos;
     off = wc->multichannel ? 4 : 0;
     if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
         return AVERROR(ENOMEM);
@@ -304,7 +316,7 @@ static int wv_read_packet(AVFormatContext *s,
     pkt->stream_index = 0;
     wc->block_parsed = 1;
     pkt->pts = wc->soff;
-    av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
+    av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
     return 0;
 }
 
@@ -318,7 +330,8 @@ static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
     int64_t pos, pts;
 
     /* if found, seek there */
-    if (index >= 0){
+    if (index >= 0 &&
+        timestamp <= st->index_entries[st->nb_index_entries - 1].timestamp) {
         wc->block_parsed = 1;
         avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
         return 0;
@@ -341,12 +354,11 @@ static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
 }
 
 AVInputFormat ff_wv_demuxer = {
-    "wv",
-    NULL_IF_CONFIG_SMALL("WavPack"),
-    sizeof(WVContext),
-    wv_probe,
-    wv_read_header,
-    wv_read_packet,
-    NULL,
-    wv_read_seek,
+    .name           = "wv",
+    .long_name      = NULL_IF_CONFIG_SMALL("WavPack"),
+    .priv_data_size = sizeof(WVContext),
+    .read_probe     = wv_probe,
+    .read_header    = wv_read_header,
+    .read_packet    = wv_read_packet,
+    .read_seek      = wv_read_seek,
 };