[FFmpeg-devel] [PATCH] swscale: Pass through chroma positions in sws_getCachedContext

[Kieran Kunhya]

---
 libswscale/utils.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/libswscale/utils.c b/libswscale/utils.c
index ab494ed..601e7bf 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -1960,6 +1960,8 @@ struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
 {
     static const double default_param[2] = { SWS_PARAM_DEFAULT,
                                              SWS_PARAM_DEFAULT };
+    int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
+            src_v_chr_pos = -513, dst_v_chr_pos = -513;
 
     if (!param)
         param = default_param;
@@ -1974,6 +1976,11 @@ struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
          context->flags     != flags     ||
          context->param[0]  != param[0]  ||
          context->param[1]  != param[1])) {
+
+        av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
+        av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
+        av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
+        av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
         sws_freeContext(context);
         context = NULL;
     }
@@ -1990,6 +1997,12 @@ struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
         context->flags     = flags;
         context->param[0]  = param[0];
         context->param[1]  = param[1];
+
+        av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
+        av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
+        av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
+        av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
+
         if (sws_init_context(context, srcFilter, dstFilter) < 0) {
             sws_freeContext(context);
             return NULL;
-- 
1.9.1