8svx: decode directly to the user-provided AVFrame
[ffmpeg.git] / libavformat / vocdec.c
index 13d48f7..4e06513 100644 (file)
@@ -2,25 +2,26 @@
  * 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
  */
 
 #include "libavutil/intreadwrite.h"
 #include "voc.h"
+#include "internal.h"
 
 
 static int voc_probe(AVProbeData *p)
@@ -37,21 +38,21 @@ 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);
+    avio_skip(pb, header_size);
+    st = avformat_new_stream(s, NULL);
     if (!st)
         return AVERROR(ENOMEM);
     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
@@ -61,35 +62,39 @@ static int voc_read_header(AVFormatContext *s, AVFormatParameters *ap)
 }
 
 int
-voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
+ff_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;
+    AVIOContext *pb = s->pb;
     VocType type;
-    int size;
+    int size, tmp_codec=-1;
     int sample_rate = 0;
     int channels = 1;
 
     while (!voc->remaining_size) {
-        type = get_byte(pb);
+        type = avio_r8(pb);
         if (type == VOC_TYPE_EOF)
             return AVERROR(EIO);
-        voc->remaining_size = get_le24(pb);
+        voc->remaining_size = avio_rl24(pb);
         if (!voc->remaining_size) {
-            if (url_is_streamed(s->pb))
+            if (!s->pb->seekable)
                 return AVERROR(EIO);
-            voc->remaining_size = url_fsize(pb) - url_ftell(pb);
+            voc->remaining_size = avio_size(pb) - avio_tell(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;
+            if (!dec->sample_rate) {
+                dec->sample_rate = 1000000 / (256 - avio_r8(pb));
+                if (sample_rate)
+                    dec->sample_rate = sample_rate;
+                avpriv_set_pts_info(st, 64, 1, dec->sample_rate);
+            } else
+                avio_skip(pb, 1);
             dec->channels = channels;
-            dec->codec_id = ff_codec_get_id(ff_voc_codec_tags, get_byte(pb));
+            tmp_codec = avio_r8(pb);
             dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id);
             voc->remaining_size -= 2;
             max_size -= 2;
@@ -100,32 +105,51 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
             break;
 
         case VOC_TYPE_EXTENDED:
-            sample_rate = get_le16(pb);
-            get_byte(pb);
-            channels = get_byte(pb) + 1;
+            sample_rate = avio_rl16(pb);
+            avio_r8(pb);
+            channels = avio_r8(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);
+            if (!dec->sample_rate) {
+                dec->sample_rate = avio_rl32(pb);
+                avpriv_set_pts_info(st, 64, 1, dec->sample_rate);
+            } else
+                avio_skip(pb, 4);
+            dec->bits_per_coded_sample = avio_r8(pb);
+            dec->channels = avio_r8(pb);
+            tmp_codec = avio_rl16(pb);
+            avio_skip(pb, 4);
             voc->remaining_size -= 12;
             max_size -= 12;
             break;
 
         default:
-            url_fskip(pb, voc->remaining_size);
+            avio_skip(pb, voc->remaining_size);
             max_size -= voc->remaining_size;
             voc->remaining_size = 0;
             break;
         }
     }
 
+    if (tmp_codec >= 0) {
+        tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
+        if (dec->codec_id == AV_CODEC_ID_NONE)
+            dec->codec_id = tmp_codec;
+        else if (dec->codec_id != tmp_codec)
+            av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
+        if (dec->codec_id == AV_CODEC_ID_NONE) {
+            if (s->audio_codec_id == AV_CODEC_ID_NONE) {
+                av_log(s, AV_LOG_ERROR, "unknown codec tag\n");
+                return AVERROR(EINVAL);
+            }
+            av_log(s, AV_LOG_WARNING, "unknown codec tag\n");
+        }
+    }
+
     dec->bit_rate = dec->sample_rate * dec->bits_per_coded_sample;
 
     if (max_size <= 0)
@@ -137,15 +161,15 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
 
 static int voc_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    return voc_get_packet(s, pkt, s->streams[0], 0);
+    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 },
 };