oma: return meaningful errors
[ffmpeg.git] / libavformat / sierravmd.c
index a052e7b..645b99b 100644 (file)
@@ -2,33 +2,35 @@
  * Sierra VMD Format Demuxer
  * Copyright (c) 2004 The ffmpeg Project
  *
- * 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
  */
 
 /**
- * @file libavformat/sierravmd.c
+ * @file
  * Sierra VMD file demuxer
  * by Vladimir "VAG" Gneushev (vagsoft at mail.ru)
  * for more information on the Sierra VMD file format, visit:
  *   http://www.pcisys.net/~melanson/codecs/
  */
 
+#include "libavutil/channel_layout.h"
 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
+#include "internal.h"
 
 #define VMD_HEADER_SIZE 0x0330
 #define BYTES_PER_FRAME_RECORD 16
@@ -74,14 +76,13 @@ static int vmd_probe(AVProbeData *p)
         return 0;
 
     /* only return half certainty since this check is a bit sketchy */
-    return AVPROBE_SCORE_MAX / 2;
+    return AVPROBE_SCORE_EXTENSION;
 }
 
-static int vmd_read_header(AVFormatContext *s,
-                           AVFormatParameters *ap)
+static int vmd_read_header(AVFormatContext *s)
 {
     VmdDemuxContext *vmd = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     AVStream *st = NULL, *vst;
     unsigned int toc_offset;
     unsigned char *raw_frame_table;
@@ -95,22 +96,22 @@ static int vmd_read_header(AVFormatContext *s,
     int sound_buffers;
 
     /* fetch the main header, including the 2 header length bytes */
-    url_fseek(pb, 0, SEEK_SET);
-    if (get_buffer(pb, vmd->vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE)
+    avio_seek(pb, 0, SEEK_SET);
+    if (avio_read(pb, vmd->vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE)
         return AVERROR(EIO);
 
-    if(vmd->vmd_header[16] == 'i' && vmd->vmd_header[17] == 'v' && vmd->vmd_header[18] == '3')
+    if(vmd->vmd_header[24] == 'i' && vmd->vmd_header[25] == 'v' && vmd->vmd_header[26] == '3')
         vmd->is_indeo3 = 1;
     else
         vmd->is_indeo3 = 0;
     /* start up the decoders */
-    vst = av_new_stream(s, 0);
+    vst = avformat_new_stream(s, NULL);
     if (!vst)
         return AVERROR(ENOMEM);
-    av_set_pts_info(vst, 33, 1, 10);
+    avpriv_set_pts_info(vst, 33, 1, 10);
     vmd->video_stream_index = vst->index;
     vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
-    vst->codec->codec_id = vmd->is_indeo3 ? CODEC_ID_INDEO3 : CODEC_ID_VMDVIDEO;
+    vst->codec->codec_id = vmd->is_indeo3 ? AV_CODEC_ID_INDEO3 : AV_CODEC_ID_VMDVIDEO;
     vst->codec->codec_tag = 0;  /* no fourcc */
     vst->codec->width = AV_RL16(&vmd->vmd_header[12]);
     vst->codec->height = AV_RL16(&vmd->vmd_header[14]);
@@ -125,14 +126,20 @@ static int vmd_read_header(AVFormatContext *s,
     /* if sample rate is 0, assume no audio */
     vmd->sample_rate = AV_RL16(&vmd->vmd_header[804]);
     if (vmd->sample_rate) {
-        st = av_new_stream(s, 0);
+        st = avformat_new_stream(s, NULL);
         if (!st)
             return AVERROR(ENOMEM);
         vmd->audio_stream_index = st->index;
         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
-        st->codec->codec_id = CODEC_ID_VMDAUDIO;
+        st->codec->codec_id = AV_CODEC_ID_VMDAUDIO;
         st->codec->codec_tag = 0;  /* no fourcc */
-        st->codec->channels = (vmd->vmd_header[811] & 0x80) ? 2 : 1;
+        if (vmd->vmd_header[811] & 0x80) {
+            st->codec->channels       = 2;
+            st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+        } else {
+            st->codec->channels       = 1;
+            st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+        }
         st->codec->sample_rate = vmd->sample_rate;
         st->codec->block_align = AV_RL16(&vmd->vmd_header[806]);
         if (st->codec->block_align & 0x8000) {
@@ -148,14 +155,14 @@ static int vmd_read_header(AVFormatContext *s,
         num = st->codec->block_align;
         den = st->codec->sample_rate * st->codec->channels;
         av_reduce(&den, &num, den, num, (1UL<<31)-1);
-        av_set_pts_info(vst, 33, num, den);
-        av_set_pts_info(st, 33, num, den);
+        avpriv_set_pts_info(vst, 33, num, den);
+        avpriv_set_pts_info(st, 33, num, den);
     }
 
     toc_offset = AV_RL32(&vmd->vmd_header[812]);
     vmd->frame_count = AV_RL16(&vmd->vmd_header[6]);
     vmd->frames_per_block = AV_RL16(&vmd->vmd_header[18]);
-    url_fseek(pb, toc_offset, SEEK_SET);
+    avio_seek(pb, toc_offset, SEEK_SET);
 
     raw_frame_table = NULL;
     vmd->frame_table = NULL;
@@ -172,7 +179,7 @@ static int vmd_read_header(AVFormatContext *s,
         av_free(vmd->frame_table);
         return AVERROR(ENOMEM);
     }
-    if (get_buffer(pb, raw_frame_table, raw_frame_table_size) !=
+    if (avio_read(pb, raw_frame_table, raw_frame_table_size) !=
         raw_frame_table_size) {
         av_free(raw_frame_table);
         av_free(vmd->frame_table);
@@ -189,7 +196,7 @@ static int vmd_read_header(AVFormatContext *s,
             int type;
             uint32_t size;
 
-            get_buffer(pb, chunk, BYTES_PER_FRAME_RECORD);
+            avio_read(pb, chunk, BYTES_PER_FRAME_RECORD);
             type = chunk[0];
             size = AV_RL32(&chunk[2]);
             if(!size && type != 1)
@@ -205,7 +212,7 @@ static int vmd_read_header(AVFormatContext *s,
                 vmd->frame_table[total_frames].pts = current_audio_pts;
                 total_frames++;
                 if(!current_audio_pts)
-                    current_audio_pts += sound_buffers;
+                    current_audio_pts += sound_buffers - 1;
                 else
                     current_audio_pts++;
                 break;
@@ -234,7 +241,7 @@ static int vmd_read_packet(AVFormatContext *s,
                            AVPacket *pkt)
 {
     VmdDemuxContext *vmd = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     int ret = 0;
     vmd_frame *frame;
 
@@ -243,16 +250,16 @@ static int vmd_read_packet(AVFormatContext *s,
 
     frame = &vmd->frame_table[vmd->current_frame];
     /* position the stream (will probably be there already) */
-    url_fseek(pb, frame->frame_offset, SEEK_SET);
+    avio_seek(pb, frame->frame_offset, SEEK_SET);
 
     if (av_new_packet(pkt, frame->frame_size + BYTES_PER_FRAME_RECORD))
         return AVERROR(ENOMEM);
-    pkt->pos= url_ftell(pb);
+    pkt->pos= avio_tell(pb);
     memcpy(pkt->data, frame->frame_record, BYTES_PER_FRAME_RECORD);
-    if(vmd->is_indeo3)
-        ret = get_buffer(pb, pkt->data, frame->frame_size);
+    if(vmd->is_indeo3 && frame->frame_record[0] == 0x02)
+        ret = avio_read(pb, pkt->data, frame->frame_size);
     else
-        ret = get_buffer(pb, pkt->data + BYTES_PER_FRAME_RECORD,
+        ret = avio_read(pb, pkt->data + BYTES_PER_FRAME_RECORD,
             frame->frame_size);
 
     if (ret != frame->frame_size) {
@@ -280,12 +287,12 @@ static int vmd_read_close(AVFormatContext *s)
     return 0;
 }
 
-AVInputFormat vmd_demuxer = {
-    "vmd",
-    NULL_IF_CONFIG_SMALL("Sierra VMD format"),
-    sizeof(VmdDemuxContext),
-    vmd_probe,
-    vmd_read_header,
-    vmd_read_packet,
-    vmd_read_close,
+AVInputFormat ff_vmd_demuxer = {
+    .name           = "vmd",
+    .long_name      = NULL_IF_CONFIG_SMALL("Sierra VMD"),
+    .priv_data_size = sizeof(VmdDemuxContext),
+    .read_probe     = vmd_probe,
+    .read_header    = vmd_read_header,
+    .read_packet    = vmd_read_packet,
+    .read_close     = vmd_read_close,
 };