segment: Add an option for disabling writing of a header/trailer to each segment

[ffmpeg] / libavformat / ape.c

diff --git a/libavformat/ape.c b/libavformat/ape.c
index 345648eb33014ecacc92fe3eb29d743f1e995dd9..d67e684167b40635cac8568074b8f8a70e620b6b 100644 (file)
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -159,8 +159,8 @@ static int ape_read_header(AVFormatContext * s)
     AVStream *st;
     uint32_t tag;
     int i;
-    int total_blocks;
-    int64_t pts;
+    int total_blocks, final_size = 0;
+    int64_t pts, file_size;
 
     /* Skip any leading junk such as id3v2 tags */
     ape->junklength = avio_tell(pb);
@@ -289,8 +289,17 @@ static int ape_read_header(AVFormatContext * s)
         ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
         ape->frames[i].skip     = (ape->frames[i].pos - ape->frames[0].pos) & 3;
     }
-    ape->frames[ape->totalframes - 1].size    = ape->finalframeblocks * 4;
     ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
+    /* calculate final packet size from total file size, if available */
+    file_size = avio_size(pb);
+    if (file_size > 0) {
+        final_size = file_size - ape->frames[ape->totalframes - 1].pos -
+                     ape->wavtaillength;
+        final_size -= final_size & 3;
+    }
+    if (file_size <= 0 || final_size <= 0)
+        final_size = ape->finalframeblocks * 8;
+    ape->frames[ape->totalframes - 1].size = final_size;
 
     for (i = 0; i < ape->totalframes; i++) {
         if(ape->frames[i].skip){
@@ -303,12 +312,6 @@ static int ape_read_header(AVFormatContext * s)
 
     ape_dumpinfo(s, ape);
 
-    /* try to read APE tags */
-    if (pb->seekable) {
-        ff_ape_parse_tag(s);
-        avio_seek(pb, 0, SEEK_SET);
-    }
-
     av_log(s, AV_LOG_DEBUG, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
            ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
            ape->compressiontype);
@@ -321,12 +324,11 @@ static int ape_read_header(AVFormatContext * s)
     total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
 
     st->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
-    st->codec->codec_id        = CODEC_ID_APE;
+    st->codec->codec_id        = AV_CODEC_ID_APE;
     st->codec->codec_tag       = MKTAG('A', 'P', 'E', ' ');
     st->codec->channels        = ape->channels;
     st->codec->sample_rate     = ape->samplerate;
     st->codec->bits_per_coded_sample = ape->bps;
-    st->codec->frame_size      = MAC_SUBFRAME_SIZE;
 
     st->nb_frames = ape->totalframes;
     st->start_time = 0;
@@ -346,6 +348,12 @@ static int ape_read_header(AVFormatContext * s)
         pts += ape->blocksperframe / MAC_SUBFRAME_SIZE;
     }
 
+    /* try to read APE tags */
+    if (pb->seekable) {
+        ff_ape_parse_tag(s);
+        avio_seek(pb, 0, SEEK_SET);
+    }
+
     return 0;
 }
 
@@ -357,11 +365,12 @@ static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
     uint32_t extra_size = 8;
 
     if (s->pb->eof_reached)
-        return AVERROR(EIO);
-    if (ape->currentframe > ape->totalframes)
-        return AVERROR(EIO);
+        return AVERROR_EOF;
+    if (ape->currentframe >= ape->totalframes)
+        return AVERROR_EOF;
 
-    avio_seek (s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
+    if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0)
+        return AVERROR(EIO);
 
     /* Calculate how many blocks there are in this frame */
     if (ape->currentframe == (ape->totalframes - 1))
@@ -369,6 +378,14 @@ static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
     else
         nblocks = ape->blocksperframe;
 
+    if (ape->frames[ape->currentframe].size <= 0 ||
+        ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
+        av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
+               ape->frames[ape->currentframe].size);
+        ape->currentframe++;
+        return AVERROR(EIO);
+    }
+
     if (av_new_packet(pkt,  ape->frames[ape->currentframe].size + extra_size) < 0)
         return AVERROR(ENOMEM);
 
@@ -421,5 +438,5 @@ AVInputFormat ff_ape_demuxer = {
     .read_packet    = ape_read_packet,
     .read_close     = ape_read_close,
     .read_seek      = ape_read_seek,
-    .extensions = "ape,apl,mac"
+    .extensions     = "ape,apl,mac",
 };