[vlc-devel] [PATCH 1/3] chroma: chain: handle unknown chroma

[Thomas Guillem]

If the filter output chroma is not set, this module can be used to find the
best chroma available (via the pi_allowed_chromas list).
---
 modules/video_chroma/chain.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/modules/video_chroma/chain.c b/modules/video_chroma/chain.c
index 3cd4e9f544..28e855c294 100644
--- a/modules/video_chroma/chain.c
+++ b/modules/video_chroma/chain.c
@@ -262,6 +262,33 @@ static int BuildChromaChain( filter_t *p_filter )
             i_chroma == p_filter->fmt_out.i_codec )
             continue;
 
+        if( p_filter->fmt_out.video.i_chroma == 0 )
+        {
+            /* If the output chroma is not set, use an allowed and working
+             * chroma as the new output chroma. */
+
+            if( !p_filter->b_allow_fmt_out_change )
+                break;
+
+            fmt_mid = p_filter->fmt_out;
+            fmt_mid.video.i_chroma = fmt_mid.i_codec = i_chroma;
+            fmt_mid.video.i_rmask  = 0;
+            fmt_mid.video.i_gmask  = 0;
+            fmt_mid.video.i_bmask  = 0;
+            video_format_FixRgb( &fmt_mid.video );
+
+            filter_chain_Reset( p_filter->p_sys->p_chain, &p_filter->fmt_in,
+                                &fmt_mid );
+            if( filter_chain_AppendConverter( p_filter->p_sys->p_chain,
+                                              NULL, NULL ) )
+                continue;
+
+            i_ret = VLC_SUCCESS;
+            p_filter->fmt_out.i_codec = i_chroma;
+            p_filter->fmt_out.video = fmt_mid.video;
+            break;
+        }
+
         msg_Dbg( p_filter, "Trying to use chroma %4.4s as middle man",
                  (char*)&i_chroma );
 
-- 
2.11.0