[FFmpeg-devel] [PATCH 5/6] avformat/argo_brp: allow v1.1 ASF streams to have a non-22050 sample rate in certain circumstances

[Zane van Iperen]

It seems that in files where the BASF block isn't first, v1.1 ASF streams are
allowed to be non-22050. Either this format is really inconsistent, or
FX Fighter and Croc just ignored the sample rate field, requiring the v1.1
restriction in the first place.

This bumps the version to 1.2 in these streams so they're not "corrected".

Found in Alien Odyssey games files in:
./GRAPHICS/COMMBUNK/{{COMADD1,COMM2_{1,2,3E},COMM3_{2,3,4,5,6}},FADE{1,2}}.BRP

Signed-off-by: Zane van Iperen <zane at zanevaniperen.com>
---
 libavformat/argo_brp.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/libavformat/argo_brp.c b/libavformat/argo_brp.c
index 4041183011..af64a0d6dc 100644
--- a/libavformat/argo_brp.c
+++ b/libavformat/argo_brp.c
@@ -323,6 +323,20 @@ static int argo_brp_read_header(AVFormatContext *s)
 
         ff_argo_asf_parse_chunk_header(&brp->basf.ckhdr, buf);
 
+        /*
+         * Special Case Hack. It seems that in files where the BASF block isn't first,
+         * v1.1 streams are allowed to be non-22050...
+         * Bump the version to 1.2 so ff_argo_asf_fill_stream() doesn't "correct" it.
+         *
+         * Found in Alien Odyssey games files in:
+         * ./GRAPHICS/COMMBUNK/{{COMADD1,COMM2_{1,2,3E},COMM3_{2,3,4,5,6}},FADE{1,2}}.BRP
+         *
+         * Either this format really inconsistent, or FX Fighter and Croc just ignored the
+         * sample rate field...
+         */
+        if (i != 0 && hdr->extradata.basf.version_major == 1 && hdr->extradata.basf.version_minor == 1)
+            hdr->extradata.basf.version_minor = 2;
+
         if ((ret = ff_argo_asf_fill_stream(s, st, &hdr->extradata.basf, &brp->basf.ckhdr)) < 0)
             return ret;
 
-- 
2.25.4