X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fvocdec.c;h=5ed71171820a068251db9e9f0c10345de80e27ae;hb=8ca39b855a7b0e4d9f726fa9d285bc8edcb953e6;hp=909520c5e5546398445a929259cf4b0a77069d46;hpb=80b39e1ca6e4711e2094c1a0f20a188e8751c941;p=ffmpeg

diff --git a/libavformat/vocdec.c b/libavformat/vocdec.c
index 909520c5e55..5ed71171820 100644
--- a/libavformat/vocdec.c
+++ b/libavformat/vocdec.c
@@ -2,20 +2,20 @@
  * Creative Voice File demuxer.
  * Copyright (c) 2006  Aurelien Jacobs <aurel@gnuage.org>
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -23,7 +23,6 @@
 #include "voc.h"
 #include "internal.h"
 
-
 static int voc_probe(AVProbeData *p)
 {
     int version, check;
@@ -38,115 +37,43 @@ static int voc_probe(AVProbeData *p)
     return AVPROBE_SCORE_MAX;
 }
 
-static int voc_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int voc_read_header(AVFormatContext *s)
 {
     VocDecContext *voc = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     int header_size;
-    AVStream *st;
 
-    url_fskip(pb, 20);
-    header_size = get_le16(pb) - 22;
+    avio_skip(pb, 20);
+    header_size = avio_rl16(pb) - 22;
     if (header_size != 4) {
         av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size);
         return AVERROR(ENOSYS);
     }
-    url_fskip(pb, header_size);
-    st = av_new_stream(s, 0);
-    if (!st)
-        return AVERROR(ENOMEM);
-    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    avio_skip(pb, header_size);
+
+    s->ctx_flags |= AVFMTCTX_NOHEADER;
 
     voc->remaining_size = 0;
     return 0;
 }
 
-int
-voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
-{
-    VocDecContext *voc = s->priv_data;
-    AVCodecContext *dec = st->codec;
-    ByteIOContext *pb = s->pb;
-    VocType type;
-    int size;
-    int sample_rate = 0;
-    int channels = 1;
-
-    while (!voc->remaining_size) {
-        type = get_byte(pb);
-        if (type == VOC_TYPE_EOF)
-            return AVERROR(EIO);
-        voc->remaining_size = get_le24(pb);
-        if (!voc->remaining_size) {
-            if (url_is_streamed(s->pb))
-                return AVERROR(EIO);
-            voc->remaining_size = url_fsize(pb) - url_ftell(pb);
-        }
-        max_size -= 4;
-
-        switch (type) {
-        case VOC_TYPE_VOICE_DATA:
-            dec->sample_rate = 1000000 / (256 - get_byte(pb));
-            if (sample_rate)
-                dec->sample_rate = sample_rate;
-            dec->channels = channels;
-            dec->codec_id = ff_codec_get_id(ff_voc_codec_tags, get_byte(pb));
-            dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id);
-            voc->remaining_size -= 2;
-            max_size -= 2;
-            channels = 1;
-            break;
-
-        case VOC_TYPE_VOICE_DATA_CONT:
-            break;
-
-        case VOC_TYPE_EXTENDED:
-            sample_rate = get_le16(pb);
-            get_byte(pb);
-            channels = get_byte(pb) + 1;
-            sample_rate = 256000000 / (channels * (65536 - sample_rate));
-            voc->remaining_size = 0;
-            max_size -= 4;
-            break;
-
-        case VOC_TYPE_NEW_VOICE_DATA:
-            dec->sample_rate = get_le32(pb);
-            dec->bits_per_coded_sample = get_byte(pb);
-            dec->channels = get_byte(pb);
-            dec->codec_id = ff_codec_get_id(ff_voc_codec_tags, get_le16(pb));
-            url_fskip(pb, 4);
-            voc->remaining_size -= 12;
-            max_size -= 12;
-            break;
-
-        default:
-            url_fskip(pb, voc->remaining_size);
-            max_size -= voc->remaining_size;
-            voc->remaining_size = 0;
-            break;
-        }
-    }
-
-    dec->bit_rate = dec->sample_rate * dec->bits_per_coded_sample;
-
-    if (max_size <= 0)
-        max_size = 2048;
-    size = FFMIN(voc->remaining_size, max_size);
-    voc->remaining_size -= size;
-    return av_get_packet(pb, pkt, size);
-}
-
 static int voc_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    return voc_get_packet(s, pkt, s->streams[0], 0);
+    if (!s->nb_streams) {
+        AVStream *st = avformat_new_stream(s, NULL);
+        if (!st)
+            return AVERROR(ENOMEM);
+        st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+    }
+    return ff_voc_get_packet(s, pkt, s->streams[0], 0);
 }
 
-AVInputFormat voc_demuxer = {
-    "voc",
-    NULL_IF_CONFIG_SMALL("Creative Voice file format"),
-    sizeof(VocDecContext),
-    voc_probe,
-    voc_read_header,
-    voc_read_packet,
-    .codec_tag=(const AVCodecTag* const []){ff_voc_codec_tags, 0},
+AVInputFormat ff_voc_demuxer = {
+    .name           = "voc",
+    .long_name      = NULL_IF_CONFIG_SMALL("Creative Voice"),
+    .priv_data_size = sizeof(VocDecContext),
+    .read_probe     = voc_probe,
+    .read_header    = voc_read_header,
+    .read_packet    = voc_read_packet,
+    .codec_tag      = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 },
 };