[FFmpeg-devel] [PATCH] add color table for 8-bit gray scale raw image data

[??????]

From: RaydroidX <229135...@qq.com&gt;

---
&nbsp;libavformat/riffenc.c | 9 +++++++++
&nbsp;1 file changed, 9 insertions(+)

diff --git a/libavformat/riffenc.c b/libavformat/riffenc.c
index c04d55c423..e33bcdb339 100644
--- a/libavformat/riffenc.c
+++ b/libavformat/riffenc.c
@@ -242,6 +242,15 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters 
*par,
&nbsp;&nbsp;&nbsp;&nbsp; avio_wl32(pb, pal_avi ? 1 << 
par-&gt;bits_per_coded_sample : 0);
&nbsp;&nbsp;&nbsp;&nbsp; avio_wl32(pb, 0);
&nbsp;
+       if (par-&gt;bits_per_coded_sample == 8) {
+               for(int i=0; i<256; i++) {
+                       avio_w8(pb,i);
+                       avio_w8(pb,i);
+                       avio_w8(pb,i);
+                       avio_w8(pb,0);
+               }
+       }
+
&nbsp;&nbsp;&nbsp;&nbsp; if (!ignore_extradata) {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (par-&gt;extradata_size) {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
avio_write(pb, par-&gt;extradata, extradata_size);
-- 
2.30.1 (Apple Git-130)
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