X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fwv.c;h=ed1eefeea0f8eb62c3949c65784c6a938995cc99;hb=263a93ecff7268d803d8704e50460e5876e828e1;hp=93c3399f0dc1bc1570de5caa6a4fdf5241c6cae5;hpb=730581f3b4f55413368693f0c077c8177d070102;p=ffmpeg

diff --git a/libavformat/wv.c b/libavformat/wv.c
index 93c3399f0dc..ed1eefeea0f 100644
--- a/libavformat/wv.c
+++ b/libavformat/wv.c
@@ -2,18 +2,20 @@
  * WavPack demuxer
  * Copyright (c) 2006 Konstantin Shishkov.
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -48,8 +50,10 @@ static const int wv_rates[16] = {
 typedef struct{
     uint32_t blksize, flags;
     int rate, chan, bpp;
+    uint32_t samples, soff;
     int block_parsed;
     uint8_t extra[WV_EXTRA_SIZE];
+    int64_t pos;
 }WVContext;
 
 static int wv_probe(AVProbeData *p)
@@ -71,6 +75,7 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
     int size;
     int rate, bpp, chan;
 
+    wc->pos = url_ftell(pb);
     tag = get_le32(pb);
     if (tag != MKTAG('w', 'v', 'p', 'k'))
         return -1;
@@ -87,10 +92,10 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
     }
     get_byte(pb); // track no
     get_byte(pb); // track sub index
-    get_le32(pb); // total samples in file
-    get_le32(pb); // offset in samples of current block
+    wc->samples = get_le32(pb); // total samples in file
+    wc->soff = get_le32(pb); // offset in samples of current block
     get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
-    wc->flags = LE_32(wc->extra + 4);
+    wc->flags = AV_RL32(wc->extra + 4);
     //parse flags
     if(wc->flags & WV_FLOAT){
         av_log(ctx, AV_LOG_ERROR, "Floating point data is not supported\n");
@@ -116,15 +121,15 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
     if(!wc->chan) wc->chan = chan;
     if(!wc->rate) wc->rate = rate;
 
-    if(bpp != wc->bpp){
+    if(wc->flags && bpp != wc->bpp){
         av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
         return -1;
     }
-    if(chan != wc->chan){
+    if(wc->flags && chan != wc->chan){
         av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
         return -1;
     }
-    if(rate != wc->rate){
+    if(wc->flags && rate != wc->rate){
         av_log(ctx, AV_LOG_ERROR, "Sampling rate differ, this block: %i, header block: %i\n", rate, wc->rate);
         return -1;
     }
@@ -153,6 +158,8 @@ static int wv_read_header(AVFormatContext *s,
     st->codec->sample_rate = wc->rate;
     st->codec->bits_per_sample = wc->bpp;
     av_set_pts_info(st, 64, 1, wc->rate);
+    s->start_time = 0;
+    s->duration = (int64_t)wc->samples * AV_TIME_BASE / st->codec->sample_rate;
     return 0;
 }
 
@@ -160,21 +167,15 @@ static int wv_read_packet(AVFormatContext *s,
                           AVPacket *pkt)
 {
     WVContext *wc = s->priv_data;
-    int ret, samples;
+    int ret;
 
     if (url_feof(&s->pb))
-        return -EIO;
+        return AVERROR(EIO);
     if(wc->block_parsed){
         if(wv_read_block_header(s, &s->pb) < 0)
             return -1;
     }
 
-    samples = LE_32(wc->extra);
-    /* should not happen but who knows */
-    if(samples * 2 * wc->chan > AVCODEC_MAX_AUDIO_FRAME_SIZE){
-        av_log(s, AV_LOG_ERROR, "Packet size is too big to be handled in lavc!\n");
-        return -EIO;
-    }
     if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE) < 0)
         return AVERROR_NOMEM;
     memcpy(pkt->data, wc->extra, WV_EXTRA_SIZE);
@@ -186,7 +187,8 @@ static int wv_read_packet(AVFormatContext *s,
     pkt->stream_index = 0;
     wc->block_parsed = 1;
     pkt->size = ret + WV_EXTRA_SIZE;
-
+    pkt->pts = wc->soff;
+    av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
     return 0;
 }
 
@@ -195,6 +197,38 @@ static int wv_read_close(AVFormatContext *s)
     return 0;
 }
 
+static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
+{
+    AVStream *st = s->streams[stream_index];
+    WVContext *wc = s->priv_data;
+    AVPacket pkt1, *pkt = &pkt1;
+    int ret;
+    int index = av_index_search_timestamp(st, timestamp, flags);
+    int64_t pos, pts;
+
+    /* if found, seek there */
+    if (index >= 0){
+        wc->block_parsed = 1;
+        url_fseek(&s->pb, st->index_entries[index].pos, SEEK_SET);
+        return 0;
+    }
+    /* if timestamp is out of bounds, return error */
+    if(timestamp < 0 || timestamp >= s->duration)
+        return -1;
+
+    pos = url_ftell(&s->pb);
+    do{
+        ret = av_read_frame(s, pkt);
+        if (ret < 0){
+            url_fseek(&s->pb, pos, SEEK_SET);
+            return -1;
+        }
+        pts = pkt->pts;
+        av_free_packet(pkt);
+    }while(pts < timestamp);
+    return 0;
+}
+
 AVInputFormat wv_demuxer = {
     "wv",
     "WavPack",
@@ -203,5 +237,5 @@ AVInputFormat wv_demuxer = {
     wv_read_header,
     wv_read_packet,
     wv_read_close,
-    pcm_read_seek,
+    wv_read_seek,
 };