X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Favfiltergraph.c;h=6f219a62b5d321e144d0e58ccad8ee82859df92c;hb=126b638ea0c7838fde13850a0ad833170a269253;hp=cf8ba93bb9721283ae47015d6e7a32ea2d26c4e2;hpb=5ded633e07b670b8f77528e7e91ffde9605de46e;p=ffmpeg diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c index cf8ba93bb97..6f219a62b5d 100644 --- a/libavfilter/avfiltergraph.c +++ b/libavfilter/avfiltergraph.c @@ -1,5 +1,6 @@ /* - * Filter graphs + * filter graphs + * copyright (c) 2008 Vitor Sessak * copyright (c) 2007 Bobby Bingham * * This file is part of FFmpeg. @@ -19,383 +20,84 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include #include -#include -#include "avstring.h" #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) +void avfilter_graph_destroy(AVFilterGraph *graph) { - 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, - //.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, 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]; + 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); } -static int *graph_out_query_formats(AVFilterLink *link) +int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) { - AVFilterLink *link2 = get_intern_output_link(link); + AVFilterContext **filters = av_realloc(graph->filters, + sizeof(AVFilterContext*) * (graph->filter_count+1)); + if (!filters) + return AVERROR(ENOMEM); - 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); + graph->filters = filters; + graph->filters[graph->filter_count++] = filter; - if(link2) - return avfilter_request_frame(link2); - return -1; + return 0; } -static int graph_out_config_props(AVFilterLink *link) +int avfilter_graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx) { - 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; + AVFilterContext *filt; + int i, j; - if(!(config_props = link2->src->output_pads[link2->srcpad].config_props)) - config_props = avfilter_default_config_output_link; - ret = config_props(link2); + for (i=0; i < graph->filter_count; i++) { + filt = graph->filters[i]; - link->w = link2->w; - link->h = link2->h; - link->format = link2->format; + 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; + } + } - return ret; -} + 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; + } + } + } -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); + return 0; } -static int add_graph_output(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx, - char *name) +int avfilter_graph_config_links(AVFilterGraph *graph, AVClass *log_ctx) { - 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); -} + AVFilterContext *filt; + int i, ret; -static void uninit(AVFilterContext *ctx) -{ - GraphContext *graph = ctx->priv; + for (i=0; i < graph->filter_count; i++) { + filt = graph->filters[i]; - if(graph->link_filter) { - avfilter_destroy(graph->link_filter); - graph->link_filter = NULL; + if (!filt->output_count) { + if ((ret = avfilter_config_links(filt))) + return ret; + } } - 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]; @@ -403,290 +105,101 @@ AVFilterContext *avfilter_graph_get_filter(AVFilterContext *ctx, char *name) return NULL; } -int avfilter_graph_config_links(AVFilterContext *graphctx) +static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) { - GraphContext *graph = graphctx->priv; int i, j; + int scaler_count = 0; + char inst_name[30]; + /* ask all the sub-filters for their supported media formats */ for(i = 0; i < graph->filter_count; i ++) { - for(j = 0; j < graph->filters[i]->input_count; j ++) { - /* ensure that graphs contained within graphs are configured */ - if((graph->filters[i]->filter == &vf_graph || - graph->filters[i]->filter == &vf_graphfile || - graph->filters[i]->filter == &vf_graphdesc) && - avfilter_graph_config_links(graph->filters[i])) - return -1; - if(avfilter_config_link(graph->filters[i]->inputs[j])) - return -1; - } + if(graph->filters[i]->filter->query_formats) + graph->filters[i]->filter->query_formats(graph->filters[i]); + else + avfilter_default_query_formats(graph->filters[i]); } - return 0; -} - -static AVFilterContext *create_filter_with_args(const char *filt, void *opaque) -{ - AVFilterContext *ret; - char *filter = av_strdup(filt); /* copy - don't mangle the input string */ - char *name, *args; - - name = filter; - if((args = strchr(filter, '='))) { - /* ensure we at least have a name */ - if(args == filter) - goto fail; - - *args ++ = 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(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"); - - av_free(filter); - - return ret; - -fail: - av_free(filter); - return NULL; -} - -static int graph_load_chain(AVFilterContext *graphctx, - unsigned count, char **filter_list, void **opaque, - AVFilterContext **first, AVFilterContext **last) -{ - unsigned i; - AVFilterContext *filters[2] = {NULL,NULL}; - - for(i = 0; i < count; i ++) { - void *op; - - if(opaque) op = opaque[i]; - else op = NULL; - - if(!(filters[1] = create_filter_with_args(filter_list[i], op))) - goto fail; - if(i == 0) { - if(first) *first = filters[1]; - } else { - if(avfilter_link(filters[0], 0, filters[1], 0)) { - av_log(NULL, AV_LOG_ERROR, "error linking filters!\n"); - goto fail; + /* 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 = filter->inputs[j]; + if(link && link->in_formats != link->out_formats) { + if(!avfilter_merge_formats(link->in_formats, + link->out_formats)) { + AVFilterContext *scale; + 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; + } + + if (avfilter_graph_add_filter(graph, scale) < 0) + return -1; + + scale->filter->query_formats(scale); + if (((link = scale-> inputs[0]) && + !avfilter_merge_formats(link->in_formats, link->out_formats)) || + ((link = scale->outputs[0]) && + !avfilter_merge_formats(link->in_formats, link->out_formats))) { + av_log(log_ctx, AV_LOG_ERROR, + "Impossible to convert between the formats supported by the filter " + "'%s' and the filter '%s'\n", link->src->name, link->dst->name); + return -1; + } + } } } - 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; - -fail: - uninit(graphctx); - if(first) *first = NULL; - if(last) *last = NULL; - return -1; } -static int graph_load_chain_from_string(AVFilterContext *ctx, const char *str, - AVFilterContext **first, - AVFilterContext **last) +static void pick_format(AVFilterLink *link) { - int count, ret = 0; - char **strings; - char *filt; - - strings = av_malloc(sizeof(char *)); - strings[0] = av_strdup(str); - - filt = strchr(strings[0], ','); - for(count = 1; filt; count ++) { - if(filt == strings[count-1]) { - ret = -1; - goto done; - } - - strings = av_realloc(strings, sizeof(char *) * (count+1)); - strings[count] = filt + 1; - *filt = '\0'; - filt = strchr(strings[count], ','); - } - - ret = graph_load_chain(ctx, count, strings, NULL, first, last); + if(!link || !link->in_formats) + return; -done: - av_free(strings[0]); - av_free(strings); + link->in_formats->format_count = 1; + link->format = link->in_formats->formats[0]; - return ret; + avfilter_formats_unref(&link->in_formats); + avfilter_formats_unref(&link->out_formats); } -static int init(AVFilterContext *ctx, const char *args, void *opaque) +static void pick_formats(AVFilterGraph *graph) { - GraphContext *gctx = ctx->priv; - - if(!args) - return 0; - - 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, NULL, NULL); - -fail: - avfilter_destroy(gctx->link_filter); - return -1; -} - -AVFilter vf_graph = -{ - .name = "graph", - .author = "Bobby Bingham", - - .priv_size = sizeof(GraphContext), - - .init = init, - .uninit = uninit, - - .inputs = (AVFilterPad[]) {{ .name = NULL, }}, - .outputs = (AVFilterPad[]) {{ .name = NULL, }}, -}; - -static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc) -{ - AVFilterGraphDescFilter *curfilt; - AVFilterGraphDescLink *curlink; - AVFilterGraphDescExport *curpad; - AVFilterContext *filt, *filtb; - - /* create all filters */ - for(curfilt = desc->filters; curfilt; curfilt = curfilt->next) { - if(!(filt = avfilter_create_by_name(curfilt->filter, 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; - } - } + int i, j; - /* 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); - } + for(i = 0; i < graph->filter_count; i ++) { + AVFilterContext *filter = graph->filters[i]; - /* 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); + for(j = 0; j < filter->input_count; j ++) + pick_format(filter->inputs[j]); + for(j = 0; j < filter->output_count; j ++) + pick_format(filter->outputs[j]); } - - return 0; - -fail: - uninit(ctx); - return -1; } -static int init_desc(AVFilterContext *ctx, const char *args, void *opaque) +int avfilter_graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) { - GraphContext *gctx = ctx->priv; - - if(!opaque) - return -1; - - if(!(gctx->link_filter = avfilter_create(&vf_graph_dummy, NULL))) + /* find supported formats from sub-filters, and merge along links */ + if(query_formats(graph, log_ctx)) 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 vf_graphdesc = -{ - .name = "graph_desc", - .author = "Bobby Bingham", - - .priv_size = sizeof(GraphContext), - .init = init_desc, - .uninit = uninit, + /* Once everything is merged, it's possible that we'll still have + * multiple valid media format choices. We pick the first one. */ + pick_formats(graph); - .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; + return 0; } -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, }}, -}; -