[FFmpeg-cvslog] r12696 - trunk/libavfilter/avfiltergraph.c
vitor
subversion
Fri Apr 4 22:06:26 CEST 2008
Author: vitor
Date: Fri Apr 4 22:06:25 2008
New Revision: 12696
Log:
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
Modified:
trunk/libavfilter/avfiltergraph.c
Modified: trunk/libavfilter/avfiltergraph.c
==============================================================================
--- trunk/libavfilter/avfiltergraph.c (original)
+++ trunk/libavfilter/avfiltergraph.c Fri Apr 4 22:06:25 2008
@@ -29,12 +29,344 @@
typedef struct AVFilterGraph {
unsigned filter_count;
AVFilterContext **filters;
+
+ /** fake filter to handle links to internal filters */
+ AVFilterContext *link_filter;
} GraphContext;
+typedef struct {
+ AVFilterContext *graph;
+} GraphLinkContext;
+
+static int link_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+ GraphLinkContext *linkctx = ctx->priv;
+ linkctx->graph = opaque;
+ return !opaque;
+}
+
+/* given the link between the dummy filter and an internal filter whose input
+ * is being exported outside the graph, this returns the externally visible
+ * link */
+static inline AVFilterLink *get_extern_input_link(AVFilterLink *link)
+{
+ GraphLinkContext *lctx = link->src->priv;
+ return lctx->graph->inputs[link->srcpad];
+}
+
+/** query the formats supported by a filter providing input to the graph */
+static int *link_in_query_formats(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_input_link(link);
+ int *(*query_formats)(AVFilterLink *);
+
+ if(!link2)
+ return avfilter_make_format_list(0);
+
+ if(!(query_formats = link2->src->output_pads[link2->srcpad].query_formats))
+ query_formats = avfilter_default_query_output_formats;
+
+ return query_formats(link2);
+}
+
+/** request a frame from a filter providing input to the graph */
+static void link_in_request_frame(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_input_link(link);
+
+ if(!link2)
+ return;
+ avfilter_request_frame(link2);
+}
+
+static int link_in_config_props(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_input_link(link);
+ int (*config_props)(AVFilterLink *);
+ int ret;
+
+ if(!link2)
+ return -1;
+ if(!(config_props = link2->src->output_pads[link2->srcpad].config_props))
+ config_props = avfilter_default_config_output_link;
+ ret = config_props(link2);
+
+ link->w = link2->w;
+ link->h = link2->h;
+
+ return ret;
+}
+
+/* given the link between the dummy filter and an internal filter whose input
+ * is being exported outside the graph, this returns the externally visible
+ * link */
+static inline AVFilterLink *get_extern_output_link(AVFilterLink *link)
+{
+ GraphLinkContext *lctx = link->dst->priv;
+ return lctx->graph->outputs[link->dstpad];
+}
+
+/** query the formats supported by a filter taking output from the graph */
+static int *link_out_query_formats(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+
+ if(!link2)
+ return avfilter_make_format_list(0);
+
+ return link2->dst->input_pads[link2->dstpad].query_formats(link2);
+}
+
+static int link_out_config_props(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+ int (*config_props)(AVFilterLink *);
+
+ if(!link2)
+ return 0;
+
+ link2->w = link->w;
+ link2->h = link->h;
+
+ if(!(config_props = link2->dst->input_pads[link2->dstpad].config_props))
+ config_props = avfilter_default_config_input_link;
+ return config_props(link2);
+}
+
+static void link_out_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+
+ if(!link2)
+ avfilter_unref_pic(picref);
+ else
+ avfilter_start_frame(link2, picref);
+}
+
+static void link_out_end_frame(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+
+ if(link2)
+ avfilter_end_frame(link2);
+}
+
+static AVFilterPicRef *link_out_get_video_buffer(AVFilterLink *link, int perms)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+
+ if(!link2)
+ return NULL;
+ else
+ return avfilter_get_video_buffer(link2, perms);
+}
+
+static void link_out_draw_slice(AVFilterLink *link, uint8_t *data[4], int y,
+ int height)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+
+ if(link2)
+ avfilter_draw_slice(link2, data, y, height);
+}
+
+/** dummy filter used to help export filters pads outside the graph */
+static AVFilter vf_graph_dummy =
+{
+ .name = "graph_dummy",
+ .author = "Bobby Bingham",
+
+ .priv_size = sizeof(GraphLinkContext),
+
+ .init = link_init,
+ //.uninit = uninit,
+
+ .inputs = (AVFilterPad[]) {{ .name = NULL, }},
+ .outputs = (AVFilterPad[]) {{ .name = NULL, }},
+};
+
+static AVFilterLink *get_intern_input_link(AVFilterLink *link)
+{
+ GraphContext *graph = link->dst->priv;
+ return graph->link_filter->outputs[link->dstpad];
+}
+
+static void graph_in_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+ if(link2)
+ avfilter_start_frame(link2, picref);
+}
+
+static void graph_in_end_frame(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+ if(link2)
+ avfilter_end_frame(link2);
+}
+
+static AVFilterPicRef *graph_in_get_video_buffer(AVFilterLink *link, int perms)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+ if(link2)
+ return avfilter_get_video_buffer(link2, perms);
+ return NULL;
+}
+
+static void graph_in_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int height)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+ if(link2)
+ avfilter_draw_slice(link2, data, y, height);
+}
+
+static int *graph_in_query_formats(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+
+ if(!link2 || !link2->dst->input_pads[link2->dstpad].query_formats)
+ return avfilter_make_format_list(0);
+ return link2->dst->input_pads[link2->dstpad].query_formats(link2);
+}
+
+static int graph_in_config_props(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+ int (*config_props)(AVFilterLink *);
+
+ if(!link2)
+ return -1;
+
+ /* copy link properties over to the dummy internal link */
+ link2->w = link->w;
+ link2->h = link->h;
+
+ if(!(config_props = link2->dst->input_pads[link2->dstpad].config_props))
+ return 0; /* FIXME? */
+ //config_props = avfilter_default_config_input_link;
+ return config_props(link2);
+}
+
+static AVFilterLink *get_intern_output_link(AVFilterLink *link)
+{
+ GraphContext *graph = link->src->priv;
+ return graph->link_filter->inputs[link->srcpad];
+}
+
+static int *graph_out_query_formats(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_output_link(link);
+
+ if(!link2 || !link2->src->output_pads[link2->srcpad].query_formats)
+ return avfilter_make_format_list(0);
+ return link2->src->output_pads[link2->srcpad].query_formats(link2);
+}
+
+static void graph_out_request_frame(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_output_link(link);
+
+ if(link2)
+ avfilter_request_frame(link2);
+}
+
+static int graph_out_config_props(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_output_link(link);
+ int (*config_props)(AVFilterLink *);
+ int ret;
+
+ if(!link2)
+ return 0;
+
+ link2->w = link->w;
+ link2->h = link->h;
+ link2->format = link->format;
+
+ if(!(config_props = link2->src->output_pads[link2->srcpad].config_props))
+ config_props = avfilter_default_config_output_link;
+ ret = config_props(link2);
+
+ link->w = link2->w;
+ link->h = link2->h;
+ link->format = link2->format;
+
+ return ret;
+}
+
+static int add_graph_input(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx,
+ char *name)
+{
+ GraphContext *graph = gctx->priv;
+
+ AVFilterPad graph_inpad =
+ {
+ .name = name,
+ .type = AV_PAD_VIDEO,
+ .start_frame = graph_in_start_frame,
+ .end_frame = graph_in_end_frame,
+ .get_video_buffer = graph_in_get_video_buffer,
+ .draw_slice = graph_in_draw_slice,
+ .query_formats = graph_in_query_formats,
+ .config_props = graph_in_config_props,
+ /* XXX */
+ };
+ AVFilterPad dummy_outpad =
+ {
+ .name = NULL, /* FIXME? */
+ .type = AV_PAD_VIDEO,
+ .query_formats = link_in_query_formats,
+ .request_frame = link_in_request_frame,
+ .config_props = link_in_config_props,
+ };
+
+ avfilter_insert_inpad (gctx, gctx->input_count, &graph_inpad);
+ avfilter_insert_outpad(graph->link_filter, graph->link_filter->output_count,
+ &dummy_outpad);
+ return avfilter_link(graph->link_filter,
+ graph->link_filter->output_count-1, filt, idx);
+}
+
+static int add_graph_output(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx,
+ char *name)
+{
+ GraphContext *graph = gctx->priv;
+
+ AVFilterPad graph_outpad =
+ {
+ .name = name,
+ .type = AV_PAD_VIDEO,
+ .request_frame = graph_out_request_frame,
+ .query_formats = graph_out_query_formats,
+ .config_props = graph_out_config_props,
+ };
+ AVFilterPad dummy_inpad =
+ {
+ .name = NULL, /* FIXME? */
+ .type = AV_PAD_VIDEO,
+ .start_frame = link_out_start_frame,
+ .end_frame = link_out_end_frame,
+ .draw_slice = link_out_draw_slice,
+ .get_video_buffer = link_out_get_video_buffer,
+ .query_formats = link_out_query_formats,
+ .config_props = link_out_config_props,
+ };
+
+ avfilter_insert_outpad(gctx, gctx->output_count, &graph_outpad);
+ avfilter_insert_inpad (graph->link_filter, graph->link_filter->input_count,
+ &dummy_inpad);
+ return avfilter_link(filt, idx, graph->link_filter,
+ graph->link_filter->input_count-1);
+}
+
static void uninit(AVFilterContext *ctx)
{
GraphContext *graph = ctx->priv;
+ if(graph->link_filter) {
+ avfilter_destroy(graph->link_filter);
+ graph->link_filter = NULL;
+ }
for(; graph->filter_count > 0; graph->filter_count --)
avfilter_destroy(graph->filters[graph->filter_count - 1]);
av_freep(&graph->filters);
@@ -122,9 +454,14 @@ static int graph_load_chain(AVFilterCont
}
}
avfilter_graph_add_filter(graphctx, filters[1]);
+ if(i == 0 && filters[1]->input_count > 0)
+ add_graph_input(graphctx, filters[1], 0, "default");
filters[0] = filters[1];
}
+ if(filters[1]->output_count > 0)
+ add_graph_output(graphctx, filters[1], 0, "default");
+
if(last) *last = filters[1];
return 0;
@@ -170,14 +507,21 @@ done:
static int init(AVFilterContext *ctx, const char *args, void *opaque)
{
- AVFilterContext **filters = opaque;
+ GraphContext *gctx = ctx->priv;
if(!args)
return 0;
- if(!opaque)
+
+ if(!(gctx->link_filter = avfilter_create(&vf_graph_dummy, NULL)))
return -1;
+ if(avfilter_init_filter(gctx->link_filter, NULL, ctx))
+ goto fail;
- return graph_load_chain_from_string(ctx, args, filters, filters + 1);
+ return graph_load_chain_from_string(ctx, args, NULL, NULL);
+
+fail:
+ avfilter_destroy(gctx->link_filter);
+ return -1;
}
AVFilter vf_graph =
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