Merge remote-tracking branch 'qatar/master'
[ffmpeg.git] / libavfilter / avfiltergraph.c
index 3d463a8..0f363b2 100644 (file)
@@ -3,26 +3,29 @@
  * Copyright (c) 2008 Vitor Sessak
  * Copyright (c) 2007 Bobby Bingham
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <ctype.h>
 #include <string.h>
 
+#include "libavutil/audioconvert.h"
+#include "libavutil/avassert.h"
+#include "libavutil/pixdesc.h"
 #include "avfilter.h"
 #include "avfiltergraph.h"
 #include "formats.h"
@@ -54,6 +57,7 @@ void avfilter_graph_free(AVFilterGraph **graph)
         return;
     for (; (*graph)->filter_count > 0; (*graph)->filter_count--)
         avfilter_free((*graph)->filters[(*graph)->filter_count - 1]);
+    av_freep(&(*graph)->sink_links);
     av_freep(&(*graph)->scale_sws_opts);
     av_freep(&(*graph)->filters);
     av_freep(graph);
@@ -93,6 +97,11 @@ fail:
     return ret;
 }
 
+void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
+{
+    graph->disable_auto_convert = flags;
+}
+
 /**
  * Check for the validity of graph.
  *
@@ -164,17 +173,113 @@ AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name)
     return NULL;
 }
 
+static int filter_query_formats(AVFilterContext *ctx)
+{
+    int ret;
+    AVFilterFormats *formats;
+    AVFilterChannelLayouts *chlayouts;
+    AVFilterFormats *samplerates;
+    enum AVMediaType type = ctx->inputs  && ctx->inputs [0] ? ctx->inputs [0]->type :
+                            ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
+                            AVMEDIA_TYPE_VIDEO;
+
+    if ((ret = ctx->filter->query_formats(ctx)) < 0)
+        return ret;
+
+    formats = avfilter_make_all_formats(type);
+    if (!formats)
+        return AVERROR(ENOMEM);
+    avfilter_set_common_formats(ctx, formats);
+    if (type == AVMEDIA_TYPE_AUDIO) {
+        samplerates = ff_all_samplerates();
+        if (!samplerates)
+            return AVERROR(ENOMEM);
+        ff_set_common_samplerates(ctx, samplerates);
+        chlayouts = ff_all_channel_layouts();
+        if (!chlayouts)
+            return AVERROR(ENOMEM);
+        ff_set_common_channel_layouts(ctx, chlayouts);
+    }
+    return 0;
+}
+
+static int insert_conv_filter(AVFilterGraph *graph, AVFilterLink *link,
+                              const char *filt_name, const char *filt_args)
+{
+    static int auto_count = 0, ret;
+    char inst_name[32];
+    AVFilterContext *filt_ctx;
+
+    if (graph->disable_auto_convert) {
+        av_log(NULL, AV_LOG_ERROR,
+               "The filters '%s' and '%s' do not have a common format "
+               "and automatic conversion is disabled.\n",
+               link->src->name, link->dst->name);
+        return AVERROR(EINVAL);
+    }
+
+    snprintf(inst_name, sizeof(inst_name), "auto-inserted %s %d",
+            filt_name, auto_count++);
+
+    if ((ret = avfilter_graph_create_filter(&filt_ctx,
+                                            avfilter_get_by_name(filt_name),
+                                            inst_name, filt_args, NULL, graph)) < 0)
+        return ret;
+    if ((ret = avfilter_insert_filter(link, filt_ctx, 0, 0)) < 0)
+        return ret;
+
+    filter_query_formats(filt_ctx);
+
+    if ( ((link = filt_ctx-> inputs[0]) &&
+           !avfilter_merge_formats(link->in_formats, link->out_formats)) ||
+         ((link = filt_ctx->outputs[0]) &&
+           !avfilter_merge_formats(link->in_formats, link->out_formats))
+       ) {
+        av_log(NULL, 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 AVERROR(EINVAL);
+    }
+
+    if (link->type == AVMEDIA_TYPE_AUDIO &&
+         (((link = filt_ctx-> inputs[0]) &&
+           !ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)) ||
+         ((link = filt_ctx->outputs[0]) &&
+           !ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)))
+       ) {
+        av_log(NULL, AV_LOG_ERROR,
+               "Impossible to convert between the channel layouts formats supported by the filter "
+               "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
 {
     int i, j, ret;
+    char filt_args[128];
+    AVFilterFormats *formats;
+    AVFilterChannelLayouts *chlayouts;
+    AVFilterFormats *samplerates;
     int scaler_count = 0, resampler_count = 0;
 
+    for (j = 0; j < 2; j++) {
     /* ask all the sub-filters for their supported media formats */
     for (i = 0; i < graph->filter_count; i++) {
+        /* Call query_formats on sources first.
+           This is a temporary workaround for amerge,
+           until format renegociation is implemented. */
+        if (!graph->filters[i]->nb_inputs == j)
+            continue;
         if (graph->filters[i]->filter->query_formats)
-            graph->filters[i]->filter->query_formats(graph->filters[i]);
+            ret = filter_query_formats(graph->filters[i]);
         else
-            ff_default_query_formats(graph->filters[i]);
+            ret = ff_default_query_formats(graph->filters[i]);
+        if (ret < 0)
+            return ret;
+    }
     }
 
     /* go through and merge as many format lists as possible */
@@ -183,6 +288,36 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
 
         for (j = 0; j < filter->nb_inputs; j++) {
             AVFilterLink *link = filter->inputs[j];
+#if 0
+            if (!link) continue;
+
+            if (!link->in_formats || !link->out_formats)
+                return AVERROR(EINVAL);
+
+            if (link->type == AVMEDIA_TYPE_VIDEO &&
+                !avfilter_merge_formats(link->in_formats, link->out_formats)) {
+
+                /* couldn't merge format lists, auto-insert scale filter */
+                snprintf(filt_args, sizeof(filt_args), "0:0:%s",
+                         graph->scale_sws_opts);
+                if (ret = insert_conv_filter(graph, link, "scale", filt_args))
+                    return ret;
+            }
+            else if (link->type == AVMEDIA_TYPE_AUDIO) {
+                if (!link->in_channel_layouts || !link->out_channel_layouts)
+                    return AVERROR(EINVAL);
+
+                /* Merge all three list before checking: that way, in all
+                 * three categories, aconvert will use a common format
+                 * whenever possible. */
+                formats   = avfilter_merge_formats(link->in_formats,   link->out_formats);
+                chlayouts   = ff_merge_channel_layouts(link->in_channel_layouts  , link->out_channel_layouts);
+                samplerates = ff_merge_samplerates    (link->in_samplerates, link->out_samplerates);
+
+                if (!formats || !chlayouts || !samplerates)
+                    if (ret = insert_conv_filter(graph, link, "aresample", NULL))
+                       return ret;
+#else
             int convert_needed = 0;
 
             if (!link)
@@ -228,7 +363,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
                         return ret;
                     break;
                 case AVMEDIA_TYPE_AUDIO:
-                    if (!(filter = avfilter_get_by_name("resample"))) {
+                    if (!(filter = avfilter_get_by_name("aresample"))) {
                         av_log(log_ctx, AV_LOG_ERROR, "'resample' filter "
                                "not present, cannot convert audio formats.\n");
                         return AVERROR(EINVAL);
@@ -247,7 +382,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
                 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
                     return ret;
 
-                convert->filter->query_formats(convert);
+                filter_query_formats(convert);
                 inlink  = convert->inputs[0];
                 outlink = convert->outputs[0];
                 if (!ff_merge_formats( inlink->in_formats,  inlink->out_formats) ||
@@ -272,6 +407,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
                            "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
                     return ret;
                 }
+#endif
             }
         }
     }
@@ -279,11 +415,24 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
     return 0;
 }
 
-static int pick_format(AVFilterLink *link)
+static int pick_format(AVFilterLink *link, AVFilterLink *ref)
 {
     if (!link || !link->in_formats)
         return 0;
 
+    if (link->type == AVMEDIA_TYPE_VIDEO) {
+        if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
+            int has_alpha= av_pix_fmt_descriptors[ref->format].nb_components % 2 == 0;
+            enum PixelFormat best= PIX_FMT_NONE;
+            int i;
+            for (i=0; i<link->in_formats->format_count; i++) {
+                enum PixelFormat p = link->in_formats->formats[i];
+                best= avcodec_find_best_pix_fmt2(best, p, ref->format, has_alpha, NULL);
+            }
+            link->in_formats->formats[0] = best;
+        }
+    }
+
     link->in_formats->format_count = 1;
     link->format = link->in_formats->formats[0];
 
@@ -549,15 +698,47 @@ static void swap_sample_fmts(AVFilterGraph *graph)
 static int pick_formats(AVFilterGraph *graph)
 {
     int i, j, ret;
+    int change;
+
+    do{
+        change = 0;
+        for (i = 0; i < graph->filter_count; i++) {
+            AVFilterContext *filter = graph->filters[i];
+            if (filter->nb_inputs){
+                for (j = 0; j < filter->nb_inputs; j++){
+                    if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) {
+                        pick_format(filter->inputs[j], NULL);
+                        change = 1;
+                    }
+                }
+            }
+            if (filter->nb_outputs){
+                for (j = 0; j < filter->nb_outputs; j++){
+                    if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) {
+                        pick_format(filter->outputs[j], NULL);
+                        change = 1;
+                    }
+                }
+            }
+            if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
+                for (j = 0; j < filter->nb_outputs; j++) {
+                    if(filter->outputs[j]->format<0) {
+                        pick_format(filter->outputs[j], filter->inputs[0]);
+                        change = 1;
+                    }
+                }
+            }
+        }
+    }while(change);
 
     for (i = 0; i < graph->filter_count; i++) {
         AVFilterContext *filter = graph->filters[i];
 
         for (j = 0; j < filter->nb_inputs; j++)
-            if ((ret = pick_format(filter->inputs[j])) < 0)
+            if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
                 return ret;
         for (j = 0; j < filter->nb_outputs; j++)
-            if ((ret = pick_format(filter->outputs[j])) < 0)
+            if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
                 return ret;
     }
     return 0;
@@ -591,6 +772,48 @@ static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
     return 0;
 }
 
+static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
+                                             AVClass *log_ctx)
+{
+    unsigned i, j;
+    int sink_links_count = 0, n = 0;
+    AVFilterContext *f;
+    AVFilterLink **sinks;
+
+    for (i = 0; i < graph->filter_count; i++) {
+        f = graph->filters[i];
+        for (j = 0; j < f->nb_inputs; j++) {
+            f->inputs[j]->graph     = graph;
+            f->inputs[j]->age_index = -1;
+        }
+        for (j = 0; j < f->nb_outputs; j++) {
+            f->outputs[j]->graph    = graph;
+            f->outputs[j]->age_index= -1;
+        }
+        if (!f->nb_outputs) {
+            if (f->nb_inputs > INT_MAX - sink_links_count)
+                return AVERROR(EINVAL);
+            sink_links_count += f->nb_inputs;
+        }
+    }
+    sinks = av_calloc(sink_links_count, sizeof(*sinks));
+    if (!sinks)
+        return AVERROR(ENOMEM);
+    for (i = 0; i < graph->filter_count; i++) {
+        f = graph->filters[i];
+        if (!f->nb_outputs) {
+            for (j = 0; j < f->nb_inputs; j++) {
+                sinks[n] = f->inputs[j];
+                f->inputs[j]->age_index = n++;
+            }
+        }
+    }
+    av_assert0(n == sink_links_count);
+    graph->sink_links       = sinks;
+    graph->sink_links_count = sink_links_count;
+    return 0;
+}
+
 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
 {
     int ret;
@@ -601,6 +824,128 @@ int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
         return ret;
     if ((ret = graph_config_links(graphctx, log_ctx)))
         return ret;
+    if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx)))
+        return ret;
+
+    return 0;
+}
+
+int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
+{
+    int i, r = AVERROR(ENOSYS);
+
+    if(!graph)
+        return r;
+
+    if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
+        r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
+        if(r != AVERROR(ENOSYS))
+            return r;
+    }
+
+    if(res_len && res)
+        res[0]= 0;
+
+    for (i = 0; i < graph->filter_count; i++) {
+        AVFilterContext *filter = graph->filters[i];
+        if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){
+            r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
+            if(r != AVERROR(ENOSYS)) {
+                if((flags & AVFILTER_CMD_FLAG_ONE) || r<0)
+                    return r;
+            }
+        }
+    }
+
+    return r;
+}
+
+int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
+{
+    int i;
+
+    if(!graph)
+        return 0;
+
+    for (i = 0; i < graph->filter_count; i++) {
+        AVFilterContext *filter = graph->filters[i];
+        if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
+            AVFilterCommand **que = &filter->command_queue, *next;
+            while(*que && (*que)->time <= ts)
+                que = &(*que)->next;
+            next= *que;
+            *que= av_mallocz(sizeof(AVFilterCommand));
+            (*que)->command = av_strdup(command);
+            (*que)->arg     = av_strdup(arg);
+            (*que)->time    = ts;
+            (*que)->flags   = flags;
+            (*que)->next    = next;
+            if(flags & AVFILTER_CMD_FLAG_ONE)
+                return 0;
+        }
+    }
 
     return 0;
 }
+
+static void heap_bubble_up(AVFilterGraph *graph,
+                           AVFilterLink *link, int index)
+{
+    AVFilterLink **links = graph->sink_links;
+
+    while (index) {
+        int parent = (index - 1) >> 1;
+        if (links[parent]->current_pts >= link->current_pts)
+            break;
+        links[index] = links[parent];
+        links[index]->age_index = index;
+        index = parent;
+    }
+    links[index] = link;
+    link->age_index = index;
+}
+
+static void heap_bubble_down(AVFilterGraph *graph,
+                             AVFilterLink *link, int index)
+{
+    AVFilterLink **links = graph->sink_links;
+
+    while (1) {
+        int child = 2 * index + 1;
+        if (child >= graph->sink_links_count)
+            break;
+        if (child + 1 < graph->sink_links_count &&
+            links[child + 1]->current_pts < links[child]->current_pts)
+            child++;
+        if (link->current_pts < links[child]->current_pts)
+            break;
+        links[index] = links[child];
+        links[index]->age_index = index;
+        index = child;
+    }
+    links[index] = link;
+    link->age_index = index;
+}
+
+void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
+{
+    heap_bubble_up  (graph, link, link->age_index);
+    heap_bubble_down(graph, link, link->age_index);
+}
+
+
+int avfilter_graph_request_oldest(AVFilterGraph *graph)
+{
+    while (graph->sink_links_count) {
+        AVFilterLink *oldest = graph->sink_links[0];
+        int r = avfilter_request_frame(oldest);
+        if (r != AVERROR_EOF)
+            return r;
+        /* EOF: remove the link from the heap */
+        if (oldest->age_index < --graph->sink_links_count)
+            heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
+                             oldest->age_index);
+        oldest->age_index = -1;
+    }
+    return AVERROR_EOF;
+}