Support uncompressed ("Resolution 1:1") Avid AVI Codec, (partially) fixes issue 1474.

Originally committed as revision 21154 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/rawdec.c

@@ -74,6 +74,8 @@ static av_cold int raw_init_decoder(AVCodecContext *avctx)
 
     if (avctx->codec_tag == MKTAG('r','a','w',' '))
         avctx->pix_fmt = findPixelFormat(pixelFormatBpsMOV, avctx->bits_per_coded_sample);
+    else if (avctx->codec_tag == MKTAG('A', 'V', 'R', 'n'))
+        avctx->pix_fmt = PIX_FMT_UYVY422; // Avid AVI Codec "Resolution 1:1"
     else if (avctx->codec_tag)
         avctx->pix_fmt = findPixelFormat(ff_raw_pixelFormatTags, avctx->codec_tag);
     else if (avctx->bits_per_coded_sample)

libavformat/avidec.c

@@ -518,6 +518,11 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     st->codec->codec_tag = tag1;
                     st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
                     st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts.
+                    // Support "Resolution 1:1" for Avid AVI Codec
+                    if(tag1 == MKTAG('A', 'V', 'R', 'n') &&
+                       st->codec->extradata_size >= 31 &&
+                       !memcmp(&st->codec->extradata[28], "1:1", 3))
+                        st->codec->codec_id = CODEC_ID_RAWVIDEO;
 
                     if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){
                         st->codec->extradata_size+= 9;