/*
- * Filter graphs
+ * filter graphs
* copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <string.h>
-#include <stddef.h>
-
-#include "avstring.h"
#include "avfilter.h"
#include "avfiltergraph.h"
-#include "allfilters.h"
+extern AVFilter avfilter_vf_scale;
+extern AVFilter avfilter_vf_graph;
+extern AVFilter avfilter_vf_graphfile;
+extern AVFilter avfilter_vf_graphdesc;
typedef struct AVFilterGraph {
unsigned filter_count;
AVFilterContext **filters;
- /** fake filter to handle links to internal filters */
- AVFilterContext *link_filter;
+ /** fake filters to handle links to internal filters */
+ AVFilterContext *link_filter_in;
+ AVFilterContext *link_filter_out;
} GraphContext;
typedef struct {
/**
* 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
+ * link.
*/
static inline AVFilterLink *get_extern_input_link(AVFilterLink *link)
{
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)
+/** 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);
- 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);
+ return -1;
+ return avfilter_request_frame(link2);
}
-/** request a frame from a filter providing input to the graph */
-static int link_in_request_frame(AVFilterLink *link)
+
+static int link_in_poll_frame(AVFilterLink *link)
{
AVFilterLink *link2 = get_extern_input_link(link);
-
if(!link2)
return -1;
- return avfilter_request_frame(link2);
+ return avfilter_poll_frame(link2);
}
static int link_in_config_props(AVFilterLink *link)
/**
* 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
+ * link.
*/
static inline AVFilterLink *get_extern_output_link(AVFilterLink *link)
{
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);
+ return 0;
}
static void link_out_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
static AVFilter vf_graph_dummy =
{
.name = "graph_dummy",
- .author = "Bobby Bingham",
.priv_size = sizeof(GraphLinkContext),
static AVFilterLink *get_intern_input_link(AVFilterLink *link)
{
GraphContext *graph = link->dst->priv;
- return graph->link_filter->outputs[link->dstpad];
+ return graph->link_filter_in->outputs[link->dstpad];
}
static void graph_in_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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 *);
+ int ret;
if(!link2)
return -1;
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);
+ if(!(ret = config_props(link2)))
+ link2->init_state = AVLINK_INIT;
+ else
+ link2->init_state = AVLINK_STARTINIT;
+
+ return ret;
}
static AVFilterLink *get_intern_output_link(AVFilterLink *link)
{
GraphContext *graph = link->src->priv;
- return graph->link_filter->inputs[link->srcpad];
+ return graph->link_filter_out->inputs[link->srcpad];
}
-static int *graph_out_query_formats(AVFilterLink *link)
+static int graph_out_request_frame(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);
+ if(link2)
+ return avfilter_request_frame(link2);
+ return -1;
}
-static int graph_out_request_frame(AVFilterLink *link)
+static int graph_out_poll_frame(AVFilterLink *link)
{
AVFilterLink *link2 = get_intern_output_link(link);
- if(link2)
- return avfilter_request_frame(link2);
- return -1;
+ if(!link2)
+ return -1;
+
+ return avfilter_poll_frame(link2);
}
static int graph_out_config_props(AVFilterLink *link)
{
- AVFilterLink *link2 = get_intern_output_link(link);
- int (*config_props)(AVFilterLink *);
+ GraphContext *graph = link->src->priv;
+ AVFilterLink *link2 = graph->link_filter_out->inputs[link->srcpad];
int ret;
+ if((ret = avfilter_config_links(graph->link_filter_out)))
+ return 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;
+ return 0;
}
static int add_graph_input(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx,
AVFilterPad graph_inpad =
{
.name = name,
- .type = AV_PAD_VIDEO,
+ .type = CODEC_TYPE_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,
+ .type = CODEC_TYPE_VIDEO,
.request_frame = link_in_request_frame,
+ .poll_frame = link_in_poll_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,
+ avfilter_insert_outpad(graph->link_filter_in, graph->link_filter_in->output_count,
&dummy_outpad);
- return avfilter_link(graph->link_filter,
- graph->link_filter->output_count-1, filt, idx);
+ return avfilter_link(graph->link_filter_in,
+ graph->link_filter_in->output_count-1, filt, idx);
}
static int add_graph_output(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx,
AVFilterPad graph_outpad =
{
.name = name,
- .type = AV_PAD_VIDEO,
+ .type = CODEC_TYPE_VIDEO,
.request_frame = graph_out_request_frame,
- .query_formats = graph_out_query_formats,
+ .poll_frame = graph_out_poll_frame,
.config_props = graph_out_config_props,
};
AVFilterPad dummy_inpad =
{
.name = NULL, /* FIXME? */
- .type = AV_PAD_VIDEO,
+ .type = CODEC_TYPE_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,
+ avfilter_insert_inpad (graph->link_filter_out, graph->link_filter_out->input_count,
&dummy_inpad);
- return avfilter_link(filt, idx, graph->link_filter,
- graph->link_filter->input_count-1);
+ return avfilter_link(filt, idx, graph->link_filter_out,
+ graph->link_filter_out->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;
+ 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(; graph->filter_count > 0; graph->filter_count --)
avfilter_destroy(graph->filters[graph->filter_count - 1]);
return NULL;
}
-int avfilter_graph_config_links(AVFilterContext *graphctx)
+static int query_formats(AVFilterContext *graphctx)
{
GraphContext *graph = graphctx->priv;
+ AVFilterContext *linkfiltin = graph->link_filter_in;
+ AVFilterContext *linkfiltout = graph->link_filter_out;
int i, j;
+ /* ask all the sub-filters for their supported colorspaces */
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 == &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;
- }
+ 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;
+ /* 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);
- *args ++ = 0;
+ 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);
- av_log(NULL, AV_LOG_INFO, "creating filter \"%s\" with args \"%s\"\n",
- name, args ? args : "(none)");
-
- 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 \"%s\" with args \"%s\"\n",
- name, args ? args : "(none)");
- return NULL;
+ if(graphctx->inputs[i])
+ avfilter_formats_ref(linkfiltin->outputs[i]->out_formats,
+ &graphctx-> inputs[i]->out_formats);
}
- 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;
+ if(!(link = filter->inputs[j]))
+ continue;
+ if(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_vf_scale, NULL)))
+ return -1;
+ if(scale->filter->init(scale, NULL, NULL) ||
+ avfilter_insert_filter(link, scale, 0, 0)) {
+ avfilter_destroy(scale);
+ return -1;
+ }
+
+ avfilter_graph_add_filter(graphctx, scale);
+ scale->filter->query_formats(scale);
+ if(!avfilter_merge_formats(scale-> inputs[0]->in_formats,
+ scale-> inputs[0]->out_formats) ||
+ !avfilter_merge_formats(scale->outputs[0]->in_formats,
+ scale->outputs[0]->out_formats))
+ 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;
- }
+ if(!link || !link->in_formats)
+ return;
- 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);
-
-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(GraphContext *graph)
{
- 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;
+ int i, j;
- if(!args)
- return 0;
+ for(i = 0; i < graph->filter_count; i ++) {
+ AVFilterContext *filter = graph->filters[i];
- return graph_load_chain_from_string(ctx, args, NULL, NULL);
+ if(filter->filter == &avfilter_vf_graph ||
+ filter->filter == &avfilter_vf_graphfile ||
+ filter->filter == &avfilter_vf_graphdesc)
+ pick_formats(filter->priv);
-fail:
- avfilter_destroy(gctx->link_filter);
- return -1;
+ 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]);
+ }
}
-AVFilter avfilter_vf_graph =
+int avfilter_graph_config_formats(AVFilterContext *graphctx)
{
- .name = "graph",
- .author = "Bobby Bingham",
+ GraphContext *graph = graphctx->priv;
- .priv_size = sizeof(GraphContext),
+ /* find supported formats from sub-filters, and merge along links */
+ if(query_formats(graphctx))
+ return -1;
- .init = init,
- .uninit = uninit,
+ /* Once everything is merged, it's possible that we'll still have
+ * multiple valid choices of colorspace. We pick the first one. */
+ pick_formats(graph);
- .inputs = (AVFilterPad[]) {{ .name = NULL, }},
- .outputs = (AVFilterPad[]) {{ .name = NULL, }},
-};
+ return 0;
+}
static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc)
{
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");
+ av_log(ctx, AV_LOG_ERROR,
+ "error creating filter '%s'\n", curfilt->name);
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");
+ av_log(ctx, AV_LOG_ERROR,
+ "error initializing filter '%s'\n", curfilt->name);
goto fail;
}
}
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 = avfilter_open(&vf_graph_dummy, NULL)))
+ if(!(gctx->link_filter_in = avfilter_open(&vf_graph_dummy, NULL)))
return -1;
- if(avfilter_init_filter(gctx->link_filter, NULL, ctx))
+ 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);
+ 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",
- .author = "Bobby Bingham",
.priv_size = sizeof(GraphContext),
.init = init_desc,
.uninit = uninit,
+ .query_formats = query_formats,
+
.inputs = (AVFilterPad[]) {{ .name = NULL, }},
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
};
AVFilter avfilter_vf_graphfile =
{
.name = "graph_file",
- .author = "Bobby Bingham",
.priv_size = sizeof(GraphContext),
.init = init_file,
.uninit = uninit,
+ .query_formats = query_formats,
+
.inputs = (AVFilterPad[]) {{ .name = NULL, }},
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
};
projects / ffmpeg / blobdiff