Implement frei0r source.

Originally committed as revision 25855 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -60,6 +60,7 @@ version <next>:
 - rename aspect filter to setdar, and pixelaspect to setsar
 - IEC 61937 demuxer
 - Mobotix .mxg demuxer
+- frei0r source added
 
 
 version 0.6:

doc/filters.texi

@@ -283,6 +283,7 @@ The following command:
 
 will convert the input video to the format "yuv420p".
 
+@anchor{frei0r}
 @section frei0r
 
 Apply a frei0r effect to the input video.
@@ -869,6 +870,34 @@ respectively 352 and 288 (corresponding to the CIF size format).
 timebase. The expression can contain the constants "PI", "E", "PHI",
 "AVTB" (the default timebase), and defaults to the value "AVTB".
 
+@section frei0r_src
+
+Provide a frei0r source.
+
+To enable compilation of this filter you need to install the frei0r
+header and configure FFmpeg with --enable-frei0r.
+
+The source supports the syntax:
+@example
+@var{size}:@var{rate}:@var{src_name}[@{=|:@}@var{param1}:@var{param2}:...:@var{paramN}]
+@end example
+
+@var{size} is the size of the video to generate, may be a string of the
+form @var{width}x@var{height} or a frame size abbreviation.
+@var{rate} is the rate of the video to generate, may be a string of
+the form @var{num}/@var{den} or a frame rate abbreviation.
+@var{src_name} is the name to the frei0r source to load. For more
+information regarding frei0r and how to set the parameters read the
+section "frei0r" (@pxref{frei0r}) in the description of the video
+filters.
+
+Some examples follow:
+@example
+# generate a frei0r partik0l source with size 200x200 and framerate 10
+# which is overlayed on the overlay filter main input
+frei0r_src=200x200:10:partik0l=1234 [overlay]; [in][overlay] overlay
+@end example
+
 @c man end VIDEO SOURCES
 
 @chapter Video Sinks

libavfilter/Makefile

@@ -46,6 +46,7 @@ OBJS-$(CONFIG_YADIF_FILTER)                  += vf_yadif.o
 
 OBJS-$(CONFIG_BUFFER_FILTER)                 += vsrc_buffer.o
 OBJS-$(CONFIG_COLOR_FILTER)                  += vf_pad.o
+OBJS-$(CONFIG_FREI0R_SRC_FILTER)             += vf_frei0r.o
 OBJS-$(CONFIG_NULLSRC_FILTER)                += vsrc_nullsrc.o
 
 OBJS-$(CONFIG_NULLSINK_FILTER)               += vsink_nullsink.o

libavfilter/allfilters.c

@@ -67,6 +67,7 @@ void avfilter_register_all(void)
 
     REGISTER_FILTER (BUFFER,      buffer,      vsrc);
     REGISTER_FILTER (COLOR,       color,       vsrc);
+    REGISTER_FILTER (FREI0R,      frei0r_src,  vsrc);
     REGISTER_FILTER (NULLSRC,     nullsrc,     vsrc);
 
     REGISTER_FILTER (NULLSINK,    nullsink,    vsink);

libavfilter/avfilter.h

@@ -25,7 +25,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  1
-#define LIBAVFILTER_VERSION_MINOR 65
+#define LIBAVFILTER_VERSION_MINOR 66
 #define LIBAVFILTER_VERSION_MICRO  0
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

libavfilter/vf_frei0r.c

@@ -27,6 +27,7 @@
 #include <dlfcn.h>
 #include <frei0r.h>
 #include "libavutil/avstring.h"
+#include "libavcore/imgutils.h"
 #include "libavcore/parseutils.h"
 #include "avfilter.h"
 
@@ -54,6 +55,11 @@ typedef struct Frei0rContext {
     f0r_destruct_f        destruct;
     f0r_deinit_f          deinit;
     char params[256];
+
+    /* only used by the source */
+    int w, h;
+    AVRational time_base;
+    uint64_t pts;
 } Frei0rContext;
 
 static void *load_sym(AVFilterContext *ctx, const char *sym_name)
@@ -197,18 +203,14 @@ static void *load_path(AVFilterContext *ctx, const char *prefix, const char *nam
     return dlopen(path, RTLD_NOW|RTLD_LOCAL);
 }
 
-static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
+static av_cold int frei0r_init(AVFilterContext *ctx,
+                               const char *dl_name, int type)
 {
     Frei0rContext *frei0r = ctx->priv;
     f0r_init_f            f0r_init;
     f0r_get_plugin_info_f f0r_get_plugin_info;
     f0r_plugin_info_t *pi;
-    char dl_name[1024], *path;
-
-    *frei0r->params = 0;
-
-    if (args)
-        sscanf(args, "%1023[^:]:%255c", dl_name, frei0r->params);
+    char *path;
 
     /* see: http://piksel.org/frei0r/1.2/spec/1.2/spec/group__pluglocations.html */
     if ((path = av_strdup(getenv("FREI0R_PATH")))) {
@@ -250,9 +252,10 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
 
     f0r_get_plugin_info(&frei0r->plugin_info);
     pi = &frei0r->plugin_info;
-    if (pi->plugin_type != F0R_PLUGIN_TYPE_FILTER) {
+    if (pi->plugin_type != type) {
         av_log(ctx, AV_LOG_ERROR,
-               "Invalid type '%s' for the plugin, a filter plugin was expected\n",
+               "Invalid type '%s' for the plugin\n",
+               pi->plugin_type == F0R_PLUGIN_TYPE_FILTER ? "filter" :
                pi->plugin_type == F0R_PLUGIN_TYPE_SOURCE ? "source" :
                pi->plugin_type == F0R_PLUGIN_TYPE_MIXER2 ? "mixer2" :
                pi->plugin_type == F0R_PLUGIN_TYPE_MIXER3 ? "mixer3" : "unknown");
@@ -271,6 +274,18 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
     return 0;
 }
 
+static av_cold int filter_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+    Frei0rContext *frei0r = ctx->priv;
+    char dl_name[1024];
+    *frei0r->params = 0;
+
+    if (args)
+        sscanf(args, "%1023[^:]:%255c", dl_name, frei0r->params);
+
+    return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_FILTER);
+}
+
 static av_cold void uninit(AVFilterContext *ctx)
 {
     Frei0rContext *frei0r = ctx->priv;
@@ -344,7 +359,7 @@ AVFilter avfilter_vf_frei0r = {
     .description = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
 
     .query_formats = query_formats,
-    .init = init,
+    .init = filter_init,
     .uninit = uninit,
 
     .priv_size = sizeof(Frei0rContext),
@@ -361,3 +376,89 @@ AVFilter avfilter_vf_frei0r = {
                                     .type             = AVMEDIA_TYPE_VIDEO, },
                                   { .name = NULL}},
 };
+
+static av_cold int source_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+    Frei0rContext *frei0r = ctx->priv;
+    char dl_name[1024], c;
+    char frame_size[128] = "";
+    char frame_rate[128] = "";
+    AVRational frame_rate_q;
+
+    memset(frei0r->params, 0, sizeof(frei0r->params));
+
+    if (args)
+        sscanf(args, "%127[^:]:%127[^:]:%1023[^:=]%c%255c",
+               frame_size, frame_rate, dl_name, &c, frei0r->params);
+
+    if (av_parse_video_size(&frei0r->w, &frei0r->h, frame_size) < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", frame_size);
+        return AVERROR(EINVAL);
+    }
+
+    if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0 ||
+        frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
+        av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", frame_rate);
+        return AVERROR(EINVAL);
+    }
+    frei0r->time_base.num = frame_rate_q.den;
+    frei0r->time_base.den = frame_rate_q.num;
+
+    return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_SOURCE);
+}
+
+static int source_config_props(AVFilterLink *outlink)
+{
+    AVFilterContext *ctx = outlink->src;
+    Frei0rContext *frei0r = ctx->priv;
+
+    if (av_image_check_size(frei0r->w, frei0r->h, 0, ctx) < 0)
+        return AVERROR(EINVAL);
+    outlink->w = frei0r->w;
+    outlink->h = frei0r->h;
+    outlink->time_base = frei0r->time_base;
+
+    if (!(frei0r->instance = frei0r->construct(outlink->w, outlink->h))) {
+        av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance");
+        return AVERROR(EINVAL);
+    }
+
+    return set_params(ctx, frei0r->params);
+}
+
+static int source_request_frame(AVFilterLink *outlink)
+{
+    Frei0rContext *frei0r = outlink->src->priv;
+    AVFilterBufferRef *picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+    picref->video->pixel_aspect = (AVRational) {1, 1};
+    picref->pts = frei0r->pts++;
+    picref->pos = -1;
+
+    avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
+    frei0r->update(frei0r->instance, av_rescale_q(picref->pts, frei0r->time_base, (AVRational){1,1000}),
+                   NULL, (uint32_t *)picref->data[0]);
+    avfilter_draw_slice(outlink, 0, outlink->h, 1);
+    avfilter_end_frame(outlink);
+    avfilter_unref_buffer(picref);
+
+    return 0;
+}
+
+AVFilter avfilter_vsrc_frei0r_src = {
+    .name        = "frei0r_src",
+    .description = NULL_IF_CONFIG_SMALL("Generate a frei0r source."),
+
+    .priv_size = sizeof(Frei0rContext),
+    .init      = source_init,
+    .uninit    = uninit,
+
+    .query_formats = query_formats,
+
+    .inputs    = (AVFilterPad[]) {{ .name = NULL}},
+
+    .outputs   = (AVFilterPad[]) {{ .name            = "default",
+                                    .type            = AVMEDIA_TYPE_VIDEO,
+                                    .request_frame   = source_request_frame,
+                                    .config_props    = source_config_props },
+                                  { .name = NULL}},
+};