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Let the filter graph export input and output pads from the filters it contains.
Commited in SoC by Bobby Bingham on 2007-08-07 22:33:46 Originally committed as revision 12696 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak
parent
256d0e0a72
commit
7f8fb52f06
@ -29,12 +29,344 @@
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typedef struct AVFilterGraph {
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unsigned filter_count;
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AVFilterContext **filters;
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/** fake filter to handle links to internal filters */
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AVFilterContext *link_filter;
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} GraphContext;
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typedef struct {
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AVFilterContext *graph;
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} GraphLinkContext;
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static int link_init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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GraphLinkContext *linkctx = ctx->priv;
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linkctx->graph = opaque;
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return !opaque;
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}
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/* given the link between the dummy filter and an internal filter whose input
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* is being exported outside the graph, this returns the externally visible
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* link */
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static inline AVFilterLink *get_extern_input_link(AVFilterLink *link)
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{
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GraphLinkContext *lctx = link->src->priv;
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return lctx->graph->inputs[link->srcpad];
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}
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/** query the formats supported by a filter providing input to the graph */
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static int *link_in_query_formats(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_extern_input_link(link);
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int *(*query_formats)(AVFilterLink *);
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if(!link2)
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return avfilter_make_format_list(0);
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if(!(query_formats = link2->src->output_pads[link2->srcpad].query_formats))
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query_formats = avfilter_default_query_output_formats;
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return query_formats(link2);
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}
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/** request a frame from a filter providing input to the graph */
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static void link_in_request_frame(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_extern_input_link(link);
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if(!link2)
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return;
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avfilter_request_frame(link2);
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}
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static int link_in_config_props(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_extern_input_link(link);
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int (*config_props)(AVFilterLink *);
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int ret;
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if(!link2)
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return -1;
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if(!(config_props = link2->src->output_pads[link2->srcpad].config_props))
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config_props = avfilter_default_config_output_link;
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ret = config_props(link2);
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link->w = link2->w;
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link->h = link2->h;
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return ret;
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}
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/* given the link between the dummy filter and an internal filter whose input
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* is being exported outside the graph, this returns the externally visible
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* link */
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static inline AVFilterLink *get_extern_output_link(AVFilterLink *link)
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{
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GraphLinkContext *lctx = link->dst->priv;
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return lctx->graph->outputs[link->dstpad];
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}
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/** query the formats supported by a filter taking output from the graph */
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static int *link_out_query_formats(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_extern_output_link(link);
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if(!link2)
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return avfilter_make_format_list(0);
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return link2->dst->input_pads[link2->dstpad].query_formats(link2);
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}
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static int link_out_config_props(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_extern_output_link(link);
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int (*config_props)(AVFilterLink *);
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if(!link2)
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return 0;
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link2->w = link->w;
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link2->h = link->h;
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if(!(config_props = link2->dst->input_pads[link2->dstpad].config_props))
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config_props = avfilter_default_config_input_link;
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return config_props(link2);
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}
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static void link_out_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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{
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AVFilterLink *link2 = get_extern_output_link(link);
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if(!link2)
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avfilter_unref_pic(picref);
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else
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avfilter_start_frame(link2, picref);
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}
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static void link_out_end_frame(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_extern_output_link(link);
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if(link2)
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avfilter_end_frame(link2);
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}
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static AVFilterPicRef *link_out_get_video_buffer(AVFilterLink *link, int perms)
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{
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AVFilterLink *link2 = get_extern_output_link(link);
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if(!link2)
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return NULL;
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else
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return avfilter_get_video_buffer(link2, perms);
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}
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static void link_out_draw_slice(AVFilterLink *link, uint8_t *data[4], int y,
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int height)
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{
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AVFilterLink *link2 = get_extern_output_link(link);
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if(link2)
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avfilter_draw_slice(link2, data, y, height);
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}
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/** dummy filter used to help export filters pads outside the graph */
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static AVFilter vf_graph_dummy =
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{
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.name = "graph_dummy",
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.author = "Bobby Bingham",
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.priv_size = sizeof(GraphLinkContext),
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.init = link_init,
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//.uninit = uninit,
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.inputs = (AVFilterPad[]) {{ .name = NULL, }},
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.outputs = (AVFilterPad[]) {{ .name = NULL, }},
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};
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static AVFilterLink *get_intern_input_link(AVFilterLink *link)
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{
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GraphContext *graph = link->dst->priv;
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return graph->link_filter->outputs[link->dstpad];
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}
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static void graph_in_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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{
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AVFilterLink *link2 = get_intern_input_link(link);
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if(link2)
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avfilter_start_frame(link2, picref);
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}
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static void graph_in_end_frame(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_intern_input_link(link);
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if(link2)
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avfilter_end_frame(link2);
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}
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static AVFilterPicRef *graph_in_get_video_buffer(AVFilterLink *link, int perms)
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{
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AVFilterLink *link2 = get_intern_input_link(link);
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if(link2)
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return avfilter_get_video_buffer(link2, perms);
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return NULL;
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}
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static void graph_in_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int height)
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{
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AVFilterLink *link2 = get_intern_input_link(link);
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if(link2)
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avfilter_draw_slice(link2, data, y, height);
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}
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static int *graph_in_query_formats(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_intern_input_link(link);
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if(!link2 || !link2->dst->input_pads[link2->dstpad].query_formats)
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return avfilter_make_format_list(0);
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return link2->dst->input_pads[link2->dstpad].query_formats(link2);
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}
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static int graph_in_config_props(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_intern_input_link(link);
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int (*config_props)(AVFilterLink *);
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if(!link2)
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return -1;
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/* copy link properties over to the dummy internal link */
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link2->w = link->w;
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link2->h = link->h;
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if(!(config_props = link2->dst->input_pads[link2->dstpad].config_props))
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return 0; /* FIXME? */
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//config_props = avfilter_default_config_input_link;
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return config_props(link2);
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}
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static AVFilterLink *get_intern_output_link(AVFilterLink *link)
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{
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GraphContext *graph = link->src->priv;
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return graph->link_filter->inputs[link->srcpad];
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}
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static int *graph_out_query_formats(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_intern_output_link(link);
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if(!link2 || !link2->src->output_pads[link2->srcpad].query_formats)
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return avfilter_make_format_list(0);
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return link2->src->output_pads[link2->srcpad].query_formats(link2);
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}
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static void graph_out_request_frame(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_intern_output_link(link);
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if(link2)
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avfilter_request_frame(link2);
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}
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static int graph_out_config_props(AVFilterLink *link)
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{
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AVFilterLink *link2 = get_intern_output_link(link);
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int (*config_props)(AVFilterLink *);
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int ret;
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if(!link2)
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return 0;
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link2->w = link->w;
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link2->h = link->h;
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link2->format = link->format;
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if(!(config_props = link2->src->output_pads[link2->srcpad].config_props))
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config_props = avfilter_default_config_output_link;
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ret = config_props(link2);
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link->w = link2->w;
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link->h = link2->h;
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link->format = link2->format;
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return ret;
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}
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static int add_graph_input(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx,
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char *name)
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{
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GraphContext *graph = gctx->priv;
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AVFilterPad graph_inpad =
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{
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.name = name,
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.type = AV_PAD_VIDEO,
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.start_frame = graph_in_start_frame,
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.end_frame = graph_in_end_frame,
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.get_video_buffer = graph_in_get_video_buffer,
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.draw_slice = graph_in_draw_slice,
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.query_formats = graph_in_query_formats,
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.config_props = graph_in_config_props,
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/* XXX */
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};
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AVFilterPad dummy_outpad =
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{
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.name = NULL, /* FIXME? */
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.type = AV_PAD_VIDEO,
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.query_formats = link_in_query_formats,
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.request_frame = link_in_request_frame,
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.config_props = link_in_config_props,
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};
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avfilter_insert_inpad (gctx, gctx->input_count, &graph_inpad);
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avfilter_insert_outpad(graph->link_filter, graph->link_filter->output_count,
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&dummy_outpad);
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return avfilter_link(graph->link_filter,
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graph->link_filter->output_count-1, filt, idx);
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}
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static int add_graph_output(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx,
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char *name)
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{
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GraphContext *graph = gctx->priv;
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AVFilterPad graph_outpad =
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{
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.name = name,
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.type = AV_PAD_VIDEO,
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.request_frame = graph_out_request_frame,
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.query_formats = graph_out_query_formats,
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.config_props = graph_out_config_props,
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};
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AVFilterPad dummy_inpad =
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{
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.name = NULL, /* FIXME? */
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.type = AV_PAD_VIDEO,
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.start_frame = link_out_start_frame,
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.end_frame = link_out_end_frame,
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.draw_slice = link_out_draw_slice,
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.get_video_buffer = link_out_get_video_buffer,
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.query_formats = link_out_query_formats,
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.config_props = link_out_config_props,
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};
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avfilter_insert_outpad(gctx, gctx->output_count, &graph_outpad);
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avfilter_insert_inpad (graph->link_filter, graph->link_filter->input_count,
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&dummy_inpad);
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return avfilter_link(filt, idx, graph->link_filter,
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graph->link_filter->input_count-1);
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}
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static void uninit(AVFilterContext *ctx)
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{
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GraphContext *graph = ctx->priv;
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if(graph->link_filter) {
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avfilter_destroy(graph->link_filter);
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graph->link_filter = NULL;
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}
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for(; graph->filter_count > 0; graph->filter_count --)
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avfilter_destroy(graph->filters[graph->filter_count - 1]);
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av_freep(&graph->filters);
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@ -122,9 +454,14 @@ static int graph_load_chain(AVFilterContext *graphctx,
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}
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}
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avfilter_graph_add_filter(graphctx, filters[1]);
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if(i == 0 && filters[1]->input_count > 0)
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add_graph_input(graphctx, filters[1], 0, "default");
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filters[0] = filters[1];
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}
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if(filters[1]->output_count > 0)
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add_graph_output(graphctx, filters[1], 0, "default");
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if(last) *last = filters[1];
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return 0;
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@ -170,14 +507,21 @@ done:
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static int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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AVFilterContext **filters = opaque;
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GraphContext *gctx = ctx->priv;
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if(!args)
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return 0;
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if(!opaque)
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return -1;
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return graph_load_chain_from_string(ctx, args, filters, filters + 1);
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if(!(gctx->link_filter = avfilter_create(&vf_graph_dummy, NULL)))
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return -1;
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if(avfilter_init_filter(gctx->link_filter, NULL, ctx))
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goto fail;
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return graph_load_chain_from_string(ctx, args, NULL, NULL);
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fail:
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avfilter_destroy(gctx->link_filter);
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return -1;
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}
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AVFilter vf_graph =
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