#include "avfilter.h"
#include "avfiltergraph.h"
+#include "allfilters.h"
+
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 int link_in_request_frame(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_extern_input_link(link);
+
+ if(!link2)
+ return -1;
+ 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, int y, int height)
+{
+ AVFilterLink *link2 = get_extern_output_link(link);
+
+ if(link2)
+ avfilter_draw_slice(link2, 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,
+
+ .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, int y, int height)
+{
+ AVFilterLink *link2 = get_intern_input_link(link);
+ if(link2)
+ avfilter_draw_slice(link2, 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;
+ link2->format = link->format;
+
+ 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)
+ return avfilter_make_format_list(0);
+ if(!link2->src->output_pads[link2->srcpad].query_formats)
+ return avfilter_default_query_output_formats(link2);
+ return link2->src->output_pads[link2->srcpad].query_formats(link2);
+}
+
+static int graph_out_request_frame(AVFilterLink *link)
+{
+ AVFilterLink *link2 = get_intern_output_link(link);
+
+ if(link2)
+ return avfilter_request_frame(link2);
+ return -1;
+}
+
+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);
}
+/* TODO: insert in sorted order */
void avfilter_graph_add_filter(AVFilterContext *graphctx, AVFilterContext *filter)
{
GraphContext *graph = graphctx->priv;
graph->filters[graph->filter_count - 1] = filter;
}
+/* search intelligently, once we insert in order */
+AVFilterContext *avfilter_graph_get_filter(AVFilterContext *ctx, char *name)
+{
+ GraphContext *graph = ctx->priv;
+ int i;
+
+ if(!name)
+ return NULL;
+
+ for(i = 0; i < graph->filter_count; i ++)
+ if(graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
+ return graph->filters[i];
+
+ return NULL;
+}
+
int avfilter_graph_config_links(AVFilterContext *graphctx)
{
GraphContext *graph = graphctx->priv;
int i, j;
for(i = 0; i < graph->filter_count; i ++) {
- for(j = 0; j < graph->filters[i]->input_count; j ++)
+ for(j = 0; j < graph->filters[i]->input_count; j ++) {
+ /* ensure that graphs contained within graphs are configured */
+ if((graph->filters[i]->filter == &avfilter_vf_graph ||
+ graph->filters[i]->filter == &avfilter_vf_graphfile ||
+ graph->filters[i]->filter == &avfilter_vf_graphdesc) &&
+ avfilter_graph_config_links(graph->filters[i]))
+ return -1;
if(avfilter_config_link(graph->filters[i]->inputs[j]))
return -1;
+ }
}
return 0;
av_log(NULL, AV_LOG_INFO, "creating filter \"%s\" with args \"%s\"\n",
name, args ? args : "(none)");
- if((ret = avfilter_create_by_name(name, NULL))) {
+ if((ret = avfilter_open(avfilter_get_by_name(name), NULL))) {
if(avfilter_init_filter(ret, args, opaque)) {
av_log(NULL, AV_LOG_ERROR, "error initializing filter!\n");
avfilter_destroy(ret);
goto fail;
}
- } else av_log(NULL, AV_LOG_ERROR, "error creating filter!\n");
+ } else {
+ av_log(NULL, AV_LOG_ERROR,
+ "error creating filter \"%s\" with args \"%s\"\n",
+ name, args ? args : "(none)");
+ return NULL;
+ }
av_free(filter);
}
}
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;
static int init(AVFilterContext *ctx, const char *args, void *opaque)
{
- AVFilterContext **filters = opaque;
+ GraphContext *gctx = ctx->priv;
+
+ if(!(gctx->link_filter = avfilter_open(&vf_graph_dummy, NULL)))
+ return -1;
+ if(avfilter_init_filter(gctx->link_filter, NULL, ctx))
+ goto fail;
if(!args)
return 0;
- if(!opaque)
- return -1;
- 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 =
+AVFilter avfilter_vf_graph =
{
.name = "graph",
.author = "Bobby Bingham",
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
};
+static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc)
+{
+ AVFilterGraphDescFilter *curfilt;
+ AVFilterGraphDescLink *curlink;
+ AVFilterGraphDescExport *curpad;
+ AVFilterContext *filt, *filtb;
+
+ AVFilter *filterdef;
+
+ /* create all filters */
+ for(curfilt = desc->filters; curfilt; curfilt = curfilt->next) {
+ if(!(filterdef = avfilter_get_by_name(curfilt->filter)) ||
+ !(filt = avfilter_open(filterdef, curfilt->name))) {
+ av_log(ctx, AV_LOG_ERROR, "error creating filter\n");
+ goto fail;
+ }
+ avfilter_graph_add_filter(ctx, filt);
+ if(avfilter_init_filter(filt, curfilt->args, NULL)) {
+ av_log(ctx, AV_LOG_ERROR, "error initializing filter\n");
+ goto fail;
+ }
+ }
+
+ /* create all links */
+ for(curlink = desc->links; curlink; curlink = curlink->next) {
+ if(!(filt = avfilter_graph_get_filter(ctx, curlink->src))) {
+ av_log(ctx, AV_LOG_ERROR, "link source does not exist in graph\n");
+ goto fail;
+ }
+ if(!(filtb = avfilter_graph_get_filter(ctx, curlink->dst))) {
+ av_log(ctx, AV_LOG_ERROR, "link destination does not exist in graph\n");
+ goto fail;
+ }
+ if(avfilter_link(filt, curlink->srcpad, filtb, curlink->dstpad)) {
+ av_log(ctx, AV_LOG_ERROR, "cannot create link between source and destination filters\n");
+ goto fail;
+ }
+ }
+
+ /* export all input pads */
+ for(curpad = desc->inputs; curpad; curpad = curpad->next) {
+ if(!(filt = avfilter_graph_get_filter(ctx, curpad->filter))) {
+ av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n");
+ goto fail;
+ }
+ add_graph_input(ctx, filt, curpad->pad, curpad->name);
+ }
+
+ /* export all output pads */
+ for(curpad = desc->outputs; curpad; curpad = curpad->next) {
+ if(!(filt = avfilter_graph_get_filter(ctx, curpad->filter))) {
+ av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n");
+ goto fail;
+ }
+ add_graph_output(ctx, filt, curpad->pad, curpad->name);
+ }
+
+ return 0;
+
+fail:
+ uninit(ctx);
+ return -1;
+}
+
+static int init_desc(AVFilterContext *ctx, const char *args, void *opaque)
+{
+ GraphContext *gctx = ctx->priv;
+
+ if(!opaque)
+ return -1;
+
+ if(!(gctx->link_filter = avfilter_open(&vf_graph_dummy, NULL)))
+ return -1;
+ if(avfilter_init_filter(gctx->link_filter, NULL, ctx))
+ goto fail;
+
+ return graph_load_from_desc(ctx, opaque);
+
+fail:
+ avfilter_destroy(gctx->link_filter);
+ return -1;
+}
+
+AVFilter avfilter_vf_graphdesc =
+{
+ .name = "graph_desc",
+ .author = "Bobby Bingham",
+
+ .priv_size = sizeof(GraphContext),
+
+ .init = init_desc,
+ .uninit = uninit,
+
+ .inputs = (AVFilterPad[]) {{ .name = NULL, }},
+ .outputs = (AVFilterPad[]) {{ .name = NULL, }},
+};
+
+static int init_file(AVFilterContext *ctx, const char *args, void *opaque)
+{
+ AVFilterGraphDesc *desc;
+ int ret;
+
+ if(!args)
+ return -1;
+ if(!(desc = avfilter_graph_load_desc(args)))
+ return -1;
+
+ ret = init_desc(ctx, NULL, desc);
+ avfilter_graph_free_desc(desc);
+ return ret;
+}
+
+AVFilter avfilter_vf_graphfile =
+{
+ .name = "graph_file",
+ .author = "Bobby Bingham",
+
+ .priv_size = sizeof(GraphContext),
+
+ .init = init_file,
+ .uninit = uninit,
+
+ .inputs = (AVFilterPad[]) {{ .name = NULL, }},
+ .outputs = (AVFilterPad[]) {{ .name = NULL, }},
+};
+
projects / ffmpeg / blobdiff