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4dae572fff
Commited in SoC by Vitor Sessak on 2008-02-12 20:59:51 Originally committed as revision 12723 to svn://svn.ffmpeg.org/ffmpeg/trunk
680 lines
19 KiB
C
680 lines
19 KiB
C
/*
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* filter graphs
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* copyright (c) 2007 Bobby Bingham
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avfilter.h"
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#include "avfiltergraph.h"
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extern AVFilter avfilter_vf_scale;
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extern AVFilter avfilter_vf_graph;
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extern AVFilter avfilter_vf_graphfile;
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extern AVFilter avfilter_vf_graphdesc;
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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 filters to handle links to internal filters */
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AVFilterContext *link_filter_in;
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AVFilterContext *link_filter_out;
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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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/**
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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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*/
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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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/** request a frame from a filter providing input to the graph */
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static int 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 -1;
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return avfilter_request_frame(link2);
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}
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static int link_in_poll_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 -1;
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return avfilter_poll_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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/**
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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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*/
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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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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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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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return 0;
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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, int y, 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, 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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.priv_size = sizeof(GraphLinkContext),
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.init = link_init,
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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_in->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, 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, y, height);
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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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int ret;
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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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link2->format = link->format;
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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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if(!(ret = config_props(link2)))
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link2->init_state = AVLINK_INIT;
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else
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link2->init_state = AVLINK_STARTINIT;
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return ret;
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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_out->inputs[link->srcpad];
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}
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static int 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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return avfilter_request_frame(link2);
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return -1;
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}
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static int graph_out_poll_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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return -1;
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return avfilter_poll_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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GraphContext *graph = link->src->priv;
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AVFilterLink *link2 = graph->link_filter_out->inputs[link->srcpad];
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int ret;
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if((ret = avfilter_config_links(graph->link_filter_out)))
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return ret;
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if(!link2)
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return 0;
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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 0;
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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 = CODEC_TYPE_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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.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 = CODEC_TYPE_VIDEO,
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.request_frame = link_in_request_frame,
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.poll_frame = link_in_poll_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_in, graph->link_filter_in->output_count,
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&dummy_outpad);
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return avfilter_link(graph->link_filter_in,
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graph->link_filter_in->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 = CODEC_TYPE_VIDEO,
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.request_frame = graph_out_request_frame,
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.poll_frame = graph_out_poll_frame,
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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 = CODEC_TYPE_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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.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_out, graph->link_filter_out->input_count,
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&dummy_inpad);
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return avfilter_link(filt, idx, graph->link_filter_out,
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graph->link_filter_out->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_in) {
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avfilter_destroy(graph->link_filter_in);
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graph->link_filter_in = NULL;
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}
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if(graph->link_filter_out) {
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avfilter_destroy(graph->link_filter_out);
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graph->link_filter_out = 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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}
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/* TODO: insert in sorted order */
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void avfilter_graph_add_filter(AVFilterContext *graphctx, AVFilterContext *filter)
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{
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GraphContext *graph = graphctx->priv;
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graph->filters = av_realloc(graph->filters,
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sizeof(AVFilterContext*) * ++graph->filter_count);
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graph->filters[graph->filter_count - 1] = filter;
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}
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/* search intelligently, once we insert in order */
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AVFilterContext *avfilter_graph_get_filter(AVFilterContext *ctx, char *name)
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{
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GraphContext *graph = ctx->priv;
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int i;
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if(!name)
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return NULL;
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for(i = 0; i < graph->filter_count; i ++)
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if(graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
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return graph->filters[i];
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return NULL;
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}
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static int query_formats(AVFilterContext *graphctx)
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{
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GraphContext *graph = graphctx->priv;
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AVFilterContext *linkfiltin = graph->link_filter_in;
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AVFilterContext *linkfiltout = graph->link_filter_out;
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int i, j;
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/* ask all the sub-filters for their supported colorspaces */
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for(i = 0; i < graph->filter_count; i ++) {
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if(graph->filters[i]->filter->query_formats)
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graph->filters[i]->filter->query_formats(graph->filters[i]);
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else
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avfilter_default_query_formats(graph->filters[i]);
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}
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/* use these formats on our exported links */
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for(i = 0; i < linkfiltout->input_count; i ++) {
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avfilter_formats_ref( linkfiltout->inputs[i]->in_formats,
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&linkfiltout->inputs[i]->out_formats);
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if(graphctx->outputs[i])
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avfilter_formats_ref(linkfiltout->inputs[i]->in_formats,
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&graphctx->outputs[i]->in_formats);
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}
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for(i = 0; i < linkfiltin->output_count; i ++) {
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avfilter_formats_ref( linkfiltin->outputs[i]->out_formats,
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&linkfiltin->outputs[i]->in_formats);
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if(graphctx->inputs[i])
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avfilter_formats_ref(linkfiltin->outputs[i]->out_formats,
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&graphctx-> inputs[i]->out_formats);
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}
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/* go through and merge as many format lists as possible */
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for(i = 0; i < graph->filter_count; i ++) {
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AVFilterContext *filter = graph->filters[i];
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for(j = 0; j < filter->input_count; j ++) {
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AVFilterLink *link;
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if(!(link = filter->inputs[j]))
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continue;
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if(link->in_formats != link->out_formats) {
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if(!avfilter_merge_formats(link->in_formats,
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link->out_formats)) {
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/* couldn't merge format lists. auto-insert scale filter */
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AVFilterContext *scale;
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if(!(scale = avfilter_open(&avfilter_vf_scale, NULL)))
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return -1;
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if(scale->filter->init(scale, NULL, NULL) ||
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avfilter_insert_filter(link, scale, 0, 0)) {
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avfilter_destroy(scale);
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return -1;
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}
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avfilter_graph_add_filter(graphctx, scale);
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scale->filter->query_formats(scale);
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if(!avfilter_merge_formats(scale-> inputs[0]->in_formats,
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scale-> inputs[0]->out_formats) ||
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!avfilter_merge_formats(scale->outputs[0]->in_formats,
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scale->outputs[0]->out_formats))
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return -1;
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}
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}
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}
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}
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return 0;
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}
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static void pick_format(AVFilterLink *link)
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{
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if(!link || !link->in_formats)
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return;
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link->in_formats->format_count = 1;
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link->format = link->in_formats->formats[0];
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avfilter_formats_unref(&link->in_formats);
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avfilter_formats_unref(&link->out_formats);
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}
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static void pick_formats(GraphContext *graph)
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{
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int i, j;
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for(i = 0; i < graph->filter_count; i ++) {
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AVFilterContext *filter = graph->filters[i];
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if(filter->filter == &avfilter_vf_graph ||
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filter->filter == &avfilter_vf_graphfile ||
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filter->filter == &avfilter_vf_graphdesc)
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pick_formats(filter->priv);
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for(j = 0; j < filter->input_count; j ++)
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pick_format(filter->inputs[j]);
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for(j = 0; j < filter->output_count; j ++)
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pick_format(filter->outputs[j]);
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}
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}
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int avfilter_graph_config_formats(AVFilterContext *graphctx)
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{
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GraphContext *graph = graphctx->priv;
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/* find supported formats from sub-filters, and merge along links */
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if(query_formats(graphctx))
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return -1;
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/* Once everything is merged, it's possible that we'll still have
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* multiple valid choices of colorspace. We pick the first one. */
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pick_formats(graph);
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return 0;
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}
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static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc)
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{
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AVFilterGraphDescFilter *curfilt;
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AVFilterGraphDescLink *curlink;
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AVFilterGraphDescExport *curpad;
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AVFilterContext *filt, *filtb;
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AVFilter *filterdef;
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/* create all filters */
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for(curfilt = desc->filters; curfilt; curfilt = curfilt->next) {
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if(!(filterdef = avfilter_get_by_name(curfilt->filter)) ||
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!(filt = avfilter_open(filterdef, curfilt->name))) {
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av_log(ctx, AV_LOG_ERROR,
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"error creating filter '%s'\n", curfilt->name);
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goto fail;
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}
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avfilter_graph_add_filter(ctx, filt);
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if(avfilter_init_filter(filt, curfilt->args, NULL)) {
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av_log(ctx, AV_LOG_ERROR,
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"error initializing filter '%s'\n", curfilt->name);
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goto fail;
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}
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}
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|
|
/* 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(AVFilterContext *ctx, const char *args, void *opaque)
|
|
{
|
|
GraphContext *gctx = ctx->priv;
|
|
AVFilterGraphDesc *desc;
|
|
int ret;
|
|
|
|
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;
|
|
|
|
if(!args)
|
|
return 0;
|
|
|
|
if(!(desc = avfilter_graph_parse_chain(args)))
|
|
goto fail;
|
|
|
|
ret = graph_load_from_desc(ctx, desc);
|
|
avfilter_graph_free_desc(desc);
|
|
return ret;
|
|
|
|
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, }},
|
|
};
|
|
|
|
static int init_desc(AVFilterContext *ctx, const char *args, void *opaque)
|
|
{
|
|
GraphContext *gctx = ctx->priv;
|
|
|
|
if(!opaque)
|
|
return -1;
|
|
|
|
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 graph_load_from_desc(ctx, opaque);
|
|
|
|
fail:
|
|
avfilter_destroy(gctx->link_filter_in);
|
|
if(gctx->link_filter_out)
|
|
avfilter_destroy(gctx->link_filter_out);
|
|
return -1;
|
|
}
|
|
|
|
AVFilter avfilter_vf_graphdesc =
|
|
{
|
|
.name = "graph_desc",
|
|
|
|
.priv_size = sizeof(GraphContext),
|
|
|
|
.init = init_desc,
|
|
.uninit = uninit,
|
|
|
|
.query_formats = query_formats,
|
|
|
|
.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",
|
|
|
|
.priv_size = sizeof(GraphContext),
|
|
|
|
.init = init_file,
|
|
.uninit = uninit,
|
|
|
|
.query_formats = query_formats,
|
|
|
|
.inputs = (AVFilterPad[]) {{ .name = NULL, }},
|
|
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
|
|
};
|
|
|