fftools/ffplay: fix missing hw_frames_ctx when config avfilter

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

fftools/ffplay.c

@@ -1858,6 +1858,10 @@ static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
     const AVDictionaryEntry *e = NULL;
     int nb_pix_fmts = 0;
     int i, j;
+    AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
+
+    if (!par)
+        return AVERROR(ENOMEM);
 
     for (i = 0; i < renderer_info.num_texture_formats; i++) {
         for (j = 0; j < FF_ARRAY_ELEMS(sdl_texture_format_map) - 1; j++) {
@@ -1893,6 +1897,10 @@ static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
                                             "ffplay_buffer", buffersrc_args, NULL,
                                             graph)) < 0)
         goto fail;
+    par->hw_frames_ctx = frame->hw_frames_ctx;
+    ret = av_buffersrc_parameters_set(filt_src, par);
+    if (ret < 0)
+        goto fail;
 
     ret = avfilter_graph_create_filter(&filt_out,
                                        avfilter_get_by_name("buffersink"),
@@ -1959,6 +1967,7 @@ static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
     is->out_video_filter = filt_out;
 
 fail:
+    av_freep(&par);
     return ret;
 }