/*
* filter graphs
+ * copyright (c) 2008 Vitor Sessak
* copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <ctype.h>
+#include <string.h>
+
#include "avfilter.h"
#include "avfiltergraph.h"
-typedef struct AVFilterGraph {
- unsigned filter_count;
- AVFilterContext **filters;
-
- /** fake filters to handle links to internal filters */
- AVFilterContext *link_filter_in;
- AVFilterContext *link_filter_out;
-} GraphContext;
-
-typedef struct {
- AVFilterContext *graph;
-} GraphLinkContext;
-
-static int link_init(AVFilterContext *ctx, const char *args, void *opaque)
+void avfilter_graph_destroy(AVFilterGraph *graph)
{
- 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];
+ for(; graph->filter_count > 0; graph->filter_count --)
+ avfilter_destroy(graph->filters[graph->filter_count - 1]);
+ av_freep(&graph->scale_sws_opts);
+ av_freep(&graph->filters);
}
-/**
- * Given the link between the dummy filter and an internal filter whose output
- * is being exported outside the graph, this returns the externally visible
- * link.
- */
-static inline AVFilterLink *get_extern_output_link(AVFilterLink *link)
+int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
{
- GraphLinkContext *lctx = link->dst->priv;
- return lctx->graph->outputs[link->dstpad];
-}
+ graph->filters = av_realloc(graph->filters,
+ sizeof(AVFilterContext*) * ++graph->filter_count);
+ if (!graph->filters)
+ return -1;
-/** dummy filter used to help export filters pads outside the graph */
-static AVFilter vf_graph_dummy =
-{
- .name = "graph_dummy",
+ graph->filters[graph->filter_count - 1] = filter;
- .priv_size = sizeof(GraphLinkContext),
+ return 0;
+}
- .init = link_init,
+int avfilter_graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
+{
+ AVFilterContext *filt;
+ int i, j;
- .inputs = (AVFilterPad[]) {{ .name = NULL, }},
- .outputs = (AVFilterPad[]) {{ .name = NULL, }},
-};
+ for (i=0; i < graph->filter_count; i++) {
+ filt = graph->filters[i];
-static void uninit(AVFilterContext *ctx)
-{
- GraphContext *graph = ctx->priv;
+ for (j = 0; j < filt->input_count; j++) {
+ if (!filt->inputs[j] || !filt->inputs[j]->src) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Input pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any source\n",
+ filt->input_pads[j].name, filt->name, filt->filter->name);
+ return -1;
+ }
+ }
- if(graph->link_filter_in) {
- avfilter_destroy(graph->link_filter_in);
- graph->link_filter_in = NULL;
- }
- if(graph->link_filter_out) {
- avfilter_destroy(graph->link_filter_out);
- graph->link_filter_out = NULL;
+ for (j = 0; j < filt->output_count; j++) {
+ if (!filt->outputs[j] || !filt->outputs[j]->dst) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Output pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any destination\n",
+ filt->output_pads[j].name, filt->name, filt->filter->name);
+ return -1;
+ }
+ }
}
- 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 = av_realloc(graph->filters,
- sizeof(AVFilterContext*) * ++graph->filter_count);
- graph->filters[graph->filter_count - 1] = filter;
+ return 0;
}
-/* search intelligently, once we insert in order */
-AVFilterContext *avfilter_graph_get_filter(AVFilterContext *ctx, char *name)
+AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, 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;
}
-static int query_formats(AVFilterContext *graphctx)
+static int query_formats(AVFilterGraph *graph)
{
- GraphContext *graph = graphctx->priv;
- AVFilterContext *linkfiltin = graph->link_filter_in;
- AVFilterContext *linkfiltout = graph->link_filter_out;
int i, j;
+ int scaler_count = 0;
+ char inst_name[30];
/* ask all the sub-filters for their supported colorspaces */
for(i = 0; i < graph->filter_count; i ++) {
avfilter_default_query_formats(graph->filters[i]);
}
- /* use these formats on our exported links */
- for(i = 0; i < linkfiltout->input_count; i ++) {
- avfilter_formats_ref( linkfiltout->inputs[i]->in_formats,
- &linkfiltout->inputs[i]->out_formats);
-
- if(graphctx->outputs[i])
- avfilter_formats_ref(linkfiltout->inputs[i]->in_formats,
- &graphctx->outputs[i]->in_formats);
- }
- for(i = 0; i < linkfiltin->output_count; i ++) {
- avfilter_formats_ref( linkfiltin->outputs[i]->out_formats,
- &linkfiltin->outputs[i]->in_formats);
-
- if(graphctx->inputs[i])
- avfilter_formats_ref(linkfiltin->outputs[i]->out_formats,
- &graphctx-> inputs[i]->out_formats);
- }
-
/* go through and merge as many format lists as possible */
for(i = 0; i < graph->filter_count; i ++) {
AVFilterContext *filter = graph->filters[i];
for(j = 0; j < filter->input_count; j ++) {
- AVFilterLink *link;
- if(!(link = filter->inputs[j]))
- continue;
- if(link->in_formats != link->out_formats) {
+ AVFilterLink *link = filter->inputs[j];
+ if(link && link->in_formats != link->out_formats) {
if(!avfilter_merge_formats(link->in_formats,
link->out_formats)) {
- /* couldn't merge format lists. auto-insert scale filter */
AVFilterContext *scale;
-
- if(!(scale =
- avfilter_open(avfilter_get_by_name("scale"), NULL)))
- return -1;
- if(scale->filter->init(scale, NULL, NULL) ||
- avfilter_insert_filter(link, scale, 0, 0)) {
+ char scale_args[256];
+ /* couldn't merge format lists. auto-insert scale filter */
+ snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
+ scaler_count);
+ scale =
+ avfilter_open(avfilter_get_by_name("scale"),inst_name);
+
+ snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
+ if(!scale || scale->filter->init(scale, scale_args, NULL) ||
+ avfilter_insert_filter(link, scale, 0, 0)) {
avfilter_destroy(scale);
return -1;
}
- avfilter_graph_add_filter(graphctx, scale);
+ if (avfilter_graph_add_filter(graph, scale) < 0)
+ return -1;
+
scale->filter->query_formats(scale);
if(!avfilter_merge_formats(scale-> inputs[0]->in_formats,
- scale-> inputs[0]->out_formats) ||
+ scale-> inputs[0]->out_formats)||
!avfilter_merge_formats(scale->outputs[0]->in_formats,
- scale->outputs[0]->out_formats))
+ scale->outputs[0]->out_formats))
return -1;
}
}
avfilter_formats_unref(&link->out_formats);
}
-static void pick_formats(GraphContext *graph)
+static void pick_formats(AVFilterGraph *graph)
{
int i, j;
for(i = 0; i < graph->filter_count; i ++) {
AVFilterContext *filter = graph->filters[i];
- if(filter->filter == &avfilter_vf_graph)
- pick_formats(filter->priv);
-
for(j = 0; j < filter->input_count; j ++)
pick_format(filter->inputs[j]);
for(j = 0; j < filter->output_count; j ++)
}
}
-int avfilter_graph_config_formats(AVFilterContext *graphctx)
+int avfilter_graph_config_formats(AVFilterGraph *graph)
{
- GraphContext *graph = graphctx->priv;
-
/* find supported formats from sub-filters, and merge along links */
- if(query_formats(graphctx))
+ if(query_formats(graph))
return -1;
/* Once everything is merged, it's possible that we'll still have
return 0;
}
-static int graph_load_from_desc2(AVFilterContext *ctx, AVFilterGraphDesc *desc)
-{
- AVFilterGraphDescFilter *curfilt;
- AVFilterGraphDescLink *curlink;
- AVFilterContext *filt, *filtb;
-
- AVFilter *filterdef;
- char tmp[20];
-
- /* create all filters */
- for(curfilt = desc->filters; curfilt; curfilt = curfilt->next) {
- snprintf(tmp, 20, "%d", curfilt->index);
- if(!(filterdef = avfilter_get_by_name(curfilt->filter)) ||
- !(filt = avfilter_open(filterdef, tmp))) {
- av_log(ctx, AV_LOG_ERROR,
- "error creating filter '%s'\n", curfilt->filter);
- 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 '%s'\n", curfilt->filter);
- goto fail;
- }
- }
-
- /* create all links */
- for(curlink = desc->links; curlink; curlink = curlink->next) {
- snprintf(tmp, 20, "%d", curlink->src);
- if(!(filt = avfilter_graph_get_filter(ctx, tmp))) {
- av_log(ctx, AV_LOG_ERROR, "link source does not exist in graph\n");
- goto fail;
- }
- snprintf(tmp, 20, "%d", curlink->dst);
- if(!(filtb = avfilter_graph_get_filter(ctx, tmp))) {
- 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;
- }
- }
-
- return 0;
-
-fail:
- uninit(ctx);
- return -1;
-}
-
-int graph_load_from_desc3(AVFilterContext *ctx, AVFilterGraphDesc *desc, AVFilterContext *in, int inpad, AVFilterContext *out, int outpad)
-{
- AVFilterGraphDescExport *curpad;
- char tmp[20];
- AVFilterContext *filt;
-
- if (graph_load_from_desc2(ctx, desc) < 0)
- goto fail;
-
- /* export all input pads */
- for(curpad = desc->inputs; curpad; curpad = curpad->next) {
- snprintf(tmp, 20, "%d", curpad->filter);
- if(!(filt = avfilter_graph_get_filter(ctx, tmp))) {
- av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n");
- goto fail;
- }
- if(avfilter_link(in, inpad, filt, curpad->pad)) {
- av_log(ctx, AV_LOG_ERROR, "cannot create link between source and destination filters\n");
- goto fail;
- }
- }
-
- /* export all output pads */
- for(curpad = desc->outputs; curpad; curpad = curpad->next) {
- snprintf(tmp, 20, "%d", curpad->filter);
- if(!(filt = avfilter_graph_get_filter(ctx, tmp))) {
- av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n");
- goto fail;
- }
-
- if(avfilter_link(filt, curpad->pad, out, outpad)) {
- av_log(ctx, AV_LOG_ERROR, "cannot create link between source and destination filters\n");
- goto fail;
- }
- }
-
- return 0;
-
-fail:
- uninit(ctx);
- return -1;
-}
-
-static int init(AVFilterContext *ctx, const char *args, void *opaque)
-{
- GraphContext *gctx = ctx->priv;
-
- if(!(gctx->link_filter_in = avfilter_open(&vf_graph_dummy, NULL)))
- return -1;
- if(avfilter_init_filter(gctx->link_filter_in, NULL, ctx))
- goto fail;
- if(!(gctx->link_filter_out = avfilter_open(&vf_graph_dummy, NULL)))
- goto fail;
- if(avfilter_init_filter(gctx->link_filter_out, NULL, ctx))
- goto fail;
-
- return 0;
-
-fail:
- avfilter_destroy(gctx->link_filter_in);
- if(gctx->link_filter_out)
- avfilter_destroy(gctx->link_filter_out);
- return -1;
-}
-
-AVFilter avfilter_vf_graph =
-{
- .name = "graph",
-
- .priv_size = sizeof(GraphContext),
-
- .init = init,
- .uninit = uninit,
-
- .query_formats = query_formats,
-
- .inputs = (AVFilterPad[]) {{ .name = NULL, }},
- .outputs = (AVFilterPad[]) {{ .name = NULL, }},
-};
-
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