riffenc: add option to ff_put_bmp_header to ignore extradata

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/asfenc.c

@@ -525,7 +525,7 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size,
             avio_wl16(pb, 40 + enc->extradata_size); /* size */
 
             /* BITMAPINFOHEADER header */
-            ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1);
+            ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1, 0);
         }
         end_header(pb, hpos);
     }

libavformat/avienc.c

@@ -293,7 +293,7 @@ static int avi_write_header(AVFormatContext *s)
             // are not (yet) supported.
             if (stream->codec_id != AV_CODEC_ID_XSUB) break;
         case AVMEDIA_TYPE_VIDEO:
-            ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
+            ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0, 0);
             break;
         case AVMEDIA_TYPE_AUDIO:
             if ((ret = ff_put_wav_header(pb, stream)) < 0) {

libavformat/matroskaenc.c

@@ -559,7 +559,7 @@ static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecCo
                 ret = AVERROR(EINVAL);
             }
 
-            ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0);
+            ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
         }
 
     } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {

libavformat/riff.h

@@ -45,7 +45,7 @@ void ff_end_tag(AVIOContext *pb, int64_t start);
  */
 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize);
 
-void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf);
+void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf, int ignore_extradata);
 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc);
 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size);

libavformat/riffenc.c

@@ -201,10 +201,10 @@ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
 
 /* BITMAPINFOHEADER header */
 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
-                       const AVCodecTag *tags, int for_asf)
+                       const AVCodecTag *tags, int for_asf, int ignore_extradata)
 {
     /* size */
-    avio_wl32(pb, 40 + enc->extradata_size);
+    avio_wl32(pb, 40 + (ignore_extradata ? 0 : enc->extradata_size));
     avio_wl32(pb, enc->width);
     //We always store RGB TopDown
     avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
@@ -220,10 +220,12 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
     avio_wl32(pb, 0);
     avio_wl32(pb, 0);
 
+    if (!ignore_extradata) {
     avio_write(pb, enc->extradata, enc->extradata_size);
 
     if (!for_asf && enc->extradata_size & 1)
         avio_w8(pb, 0);
+    }
 }
 
 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate,