Significantly based on a patch by Clément Bœsch.
---
avplay.c | 34 ++++++++++++++++++++++++----------
1 file changed, 24 insertions(+), 10 deletions(-)
diff --git a/avplay.c b/avplay.c
index 98fd954..54708e2 100644
--- a/avplay.c
+++ b/avplay.c
@@ -1504,7 +1504,7 @@ static int configure_video_filters(AVFilterGraph *graph,
VideoState *is, const c
char sws_flags_str[128];
char buffersrc_args[256];
int ret;
- AVFilterContext *filt_src = NULL, *filt_out = NULL, *filt_format;
+ AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter;
AVCodecContext *codec = is->video_st->codec;
snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
@@ -1526,13 +1526,27 @@ static int configure_video_filters(AVFilterGraph
*graph, VideoState *is, const c
"out", NULL, NULL, graph)) < 0)
return ret;
- if ((ret = avfilter_graph_create_filter(&filt_format,
- avfilter_get_by_name("format"),
- "format", "yuv420p", NULL, graph))
< 0)
- return ret;
- if ((ret = avfilter_link(filt_format, 0, filt_out, 0)) < 0)
- return ret;
-
+ last_filter = filt_out;
+
+/* Note: this macro adds a filter before the lastly added filter, so the
+ * processing order of the filters is in reverse */
+#define INSERT_FILT(name, arg) do { \
+ AVFilterContext *filt_ctx; \
+ \
+ ret = avfilter_graph_create_filter(&filt_ctx, \
+ avfilter_get_by_name(name), \
+ "avplay_" name, arg, NULL, graph); \
+ if (ret < 0) \
+ return ret; \
+ \
+ ret = avfilter_link(filt_ctx, 0, last_filter, 0); \
+ if (ret < 0) \
+ return ret; \
+ \
+ last_filter = filt_ctx; \
+} while (0)
+
+ INSERT_FILT("format", "yuv420p");
if (vfilters) {
AVFilterInOut *outputs = avfilter_inout_alloc();
@@ -1544,14 +1558,14 @@ static int configure_video_filters(AVFilterGraph
*graph, VideoState *is, const c
outputs->next = NULL;
inputs->name = av_strdup("out");
- inputs->filter_ctx = filt_format;
+ inputs->filter_ctx = last_filter;
inputs->pad_idx = 0;
inputs->next = NULL;
if ((ret = avfilter_graph_parse(graph, vfilters, inputs, outputs,
NULL)) < 0)
return ret;
} else {
- if ((ret = avfilter_link(filt_src, 0, filt_format, 0)) < 0)
+ if ((ret = avfilter_link(filt_src, 0, last_filter, 0)) < 0)
return ret;
}
--
1.9.5 (Apple Git-50.3)
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