return 0;
}
-static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *ref)
+static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *ref)
{
FrameStepContext *framestep = inlink->dst->priv;
- framestep->frame_selected = 0;
if (!(framestep->frame_count++ % framestep->frame_step)) {
- inlink->cur_buf = NULL;
framestep->frame_selected = 1;
- return ff_start_frame(inlink->dst->outputs[0], ref);
+ return ff_filter_frame(inlink->dst->outputs[0], ref);
+ } else {
+ framestep->frame_selected = 0;
+ avfilter_unref_buffer(ref);
+ return 0;
}
- return 0;
-}
-
-static int draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
-{
- FrameStepContext *framestep = inlink->dst->priv;
-
- if (framestep->frame_selected)
- return ff_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
- return 0;
-}
-
-static int end_frame(AVFilterLink *inlink)
-{
- FrameStepContext *framestep = inlink->dst->priv;
-
- if (framestep->frame_selected)
- return ff_end_frame(inlink->dst->outputs[0]);
- return 0;
}
static int request_frame(AVFilterLink *outlink)
return ret;
}
+static const AVFilterPad framestep_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .get_video_buffer = ff_null_get_video_buffer,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad framestep_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output_props,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
AVFilter avfilter_vf_framestep = {
.name = "framestep",
.description = NULL_IF_CONFIG_SMALL("Select one frame every N frames."),
.init = init,
.priv_size = sizeof(FrameStepContext),
-
- .inputs = (const AVFilterPad[]) {
- {
- .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .get_video_buffer = ff_null_get_video_buffer,
- .start_frame = start_frame,
- .draw_slice = draw_slice,
- .end_frame = end_frame,
- },
- { .name = NULL }
- },
- .outputs = (const AVFilterPad[]) {
- {
- .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .config_props = config_output_props,
- .request_frame = request_frame,
- },
- { .name = NULL }
- },
+ .inputs = framestep_inputs,
+ .outputs = framestep_outputs,
};