lavfi/aevalsrc: initialize pointer to expression to NULL
[ffmpeg.git] / libavfilter / vf_frei0r.c
index 1303b03..a070eb4 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * copyright (c) 2010 Stefano Sabatini
+ * Copyright (c) 2010 Stefano Sabatini
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * frei0r wrapper
  */
 
-/* #define DEBUG */
-
 #include <dlfcn.h>
 #include <frei0r.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "config.h"
 #include "libavutil/avstring.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
 #include "avfilter.h"
-#include "parseutils.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
 
 typedef f0r_instance_t (*f0r_construct_f)(unsigned int width, unsigned int height);
 typedef void (*f0r_destruct_f)(f0r_instance_t instance);
@@ -42,6 +52,7 @@ typedef void (*f0r_set_param_value_f)(f0r_instance_t instance, f0r_param_t param
 typedef void (*f0r_get_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
 
 typedef struct Frei0rContext {
+    const AVClass *class;
     f0r_update_f update;
     void *dl_handle;            /* dynamic library handle   */
     f0r_instance_t instance;
@@ -53,13 +64,21 @@ typedef struct Frei0rContext {
     f0r_construct_f       construct;
     f0r_destruct_f        destruct;
     f0r_deinit_f          deinit;
-    char params[256];
+
+    char *dl_name;
+    char *params;
+    AVRational framerate;
+
+    /* 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)
 {
-    Frei0rContext *frei0r = ctx->priv;
-    void *sym = dlsym(frei0r->dl_handle, sym_name);
+    Frei0rContext *s = ctx->priv;
+    void *sym = dlsym(s->dl_handle, sym_name);
     if (!sym)
         av_log(ctx, AV_LOG_ERROR, "Could not find symbol '%s' in loaded module\n", sym_name);
     return sym;
@@ -67,7 +86,7 @@ static void *load_sym(AVFilterContext *ctx, const char *sym_name)
 
 static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, char *param)
 {
-    Frei0rContext *frei0r = ctx->priv;
+    Frei0rContext *s = ctx->priv;
     union {
         double d;
         f0r_param_color_t col;
@@ -91,7 +110,7 @@ static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, cha
 
     case F0R_PARAM_COLOR:
         if (sscanf(param, "%f/%f/%f", &val.col.r, &val.col.g, &val.col.b) != 3) {
-            if (av_parse_color(rgba, param, ctx) < 0)
+            if (av_parse_color(rgba, param, -1, ctx) < 0)
                 goto fail;
             val.col.r = rgba[0] / 255.0;
             val.col.g = rgba[1] / 255.0;
@@ -105,7 +124,7 @@ static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, cha
         break;
     }
 
-    frei0r->set_param_value(frei0r->instance, &val, index);
+    s->set_param_value(s->instance, &val, index);
     return 0;
 
 fail:
@@ -116,27 +135,31 @@ fail:
 
 static int set_params(AVFilterContext *ctx, const char *params)
 {
-    Frei0rContext *frei0r = ctx->priv;
+    Frei0rContext *s = ctx->priv;
     int i;
 
-    for (i = 0; i < frei0r->plugin_info.num_params; i++) {
+    if (!params)
+        return 0;
+
+    for (i = 0; i < s->plugin_info.num_params; i++) {
         f0r_param_info_t info;
         char *param;
         int ret;
 
-        frei0r->get_param_info(&info, i);
+        s->get_param_info(&info, i);
 
         if (*params) {
-            if (!(param = av_get_token(&params, ":")))
+            if (!(param = av_get_token(&params, "|")))
                 return AVERROR(ENOMEM);
-            params++;               /* skip ':' */
+            if (*params)
+                params++;               /* skip ':' */
             ret = set_param(ctx, info, i, param);
             av_free(param);
             if (ret < 0)
                 return ret;
         }
 
-        av_log(ctx, AV_LOG_INFO,
+        av_log(ctx, AV_LOG_VERBOSE,
                "idx:%d name:'%s' type:%s explanation:'%s' ",
                i, info.name,
                info.type == F0R_PARAM_BOOL     ? "bool"     :
@@ -147,7 +170,7 @@ static int set_params(AVFilterContext *ctx, const char *params)
                info.explanation);
 
 #ifdef DEBUG
-        av_log(ctx, AV_LOG_INFO, "value:");
+        av_log(ctx, AV_LOG_DEBUG, "value:");
         switch (info.type) {
             void *v;
             double d;
@@ -157,109 +180,144 @@ static int set_params(AVFilterContext *ctx, const char *params)
 
         case F0R_PARAM_BOOL:
             v = &d;
-            frei0r->get_param_value(frei0r->instance, v, i);
-            av_log(ctx, AV_LOG_INFO, "%s", d >= 0.5 && d <= 1.0 ? "y" : "n");
+            s->get_param_value(s->instance, v, i);
+            av_log(ctx, AV_LOG_DEBUG, "%s", d >= 0.5 && d <= 1.0 ? "y" : "n");
             break;
         case F0R_PARAM_DOUBLE:
             v = &d;
-            frei0r->get_param_value(frei0r->instance, v, i);
-            av_log(ctx, AV_LOG_INFO, "%f", d);
+            s->get_param_value(s->instance, v, i);
+            av_log(ctx, AV_LOG_DEBUG, "%f", d);
             break;
         case F0R_PARAM_COLOR:
             v = &col;
-            frei0r->get_param_value(frei0r->instance, v, i);
-            av_log(ctx, AV_LOG_INFO, "%f/%f/%f", col.r, col.g, col.b);
+            s->get_param_value(s->instance, v, i);
+            av_log(ctx, AV_LOG_DEBUG, "%f/%f/%f", col.r, col.g, col.b);
             break;
         case F0R_PARAM_POSITION:
             v = &pos;
-            frei0r->get_param_value(frei0r->instance, v, i);
-            av_log(ctx, AV_LOG_INFO, "%lf/%lf", pos.x, pos.y);
+            s->get_param_value(s->instance, v, i);
+            av_log(ctx, AV_LOG_DEBUG, "%f/%f", pos.x, pos.y);
             break;
         default: /* F0R_PARAM_STRING */
             v = s;
-            frei0r->get_param_value(frei0r->instance, v, i);
-            av_log(ctx, AV_LOG_INFO, "'%s'\n", s);
+            s->get_param_value(s->instance, v, i);
+            av_log(ctx, AV_LOG_DEBUG, "'%s'\n", s);
             break;
         }
 #endif
-        av_log(ctx, AV_LOG_INFO, "\n");
+        av_log(ctx, AV_LOG_VERBOSE, "\n");
     }
 
     return 0;
 }
 
-static void *load_path(AVFilterContext *ctx, const char *prefix, const char *name)
+static int load_path(AVFilterContext *ctx, void **handle_ptr, const char *prefix, const char *name)
 {
-    char path[1024];
-
-    snprintf(path, sizeof(path), "%s%s.so", prefix, name);
+    char *path = av_asprintf("%s%s%s", prefix, name, SLIBSUF);
+    if (!path)
+        return AVERROR(ENOMEM);
     av_log(ctx, AV_LOG_DEBUG, "Looking for frei0r effect in '%s'\n", path);
-    return dlopen(path, RTLD_NOW|RTLD_LOCAL);
+    *handle_ptr = dlopen(path, RTLD_NOW|RTLD_LOCAL);
+    av_free(path);
+    return 0;
 }
 
-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;
+    Frei0rContext *s = 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;
+    char *path;
+    int ret = 0;
 
-    if (args)
-        sscanf(args, "%1023[^:]:%255c", dl_name, frei0r->params);
+    if (!dl_name) {
+        av_log(ctx, AV_LOG_ERROR, "No filter name provided.\n");
+        return AVERROR(EINVAL);
+    }
 
-    /* see: http://piksel.org/frei0r/1.2/spec/1.2/spec/group__pluglocations.html */
+    /* see: http://frei0r.dyne.org/codedoc/html/group__pluglocations.html */
     if ((path = av_strdup(getenv("FREI0R_PATH")))) {
+#ifdef _WIN32
+        const char *separator = ";";
+#else
+        const char *separator = ":";
+#endif
         char *p, *ptr = NULL;
-        for (p = path; p = strtok_r(p, ":", &ptr); p = NULL)
-            if (frei0r->dl_handle = load_path(ctx, p, dl_name))
+        for (p = path; p = av_strtok(p, separator, &ptr); p = NULL) {
+            /* add additional trailing slash in case it is missing */
+            char *p1 = av_asprintf("%s/", p);
+            if (!p1) {
+                ret = AVERROR(ENOMEM);
+                goto check_path_end;
+            }
+            ret = load_path(ctx, &s->dl_handle, p1, dl_name);
+            av_free(p1);
+            if (ret < 0)
+                goto check_path_end;
+            if (s->dl_handle)
                 break;
+        }
+
+    check_path_end:
         av_free(path);
+        if (ret < 0)
+            return ret;
+    }
+    if (!s->dl_handle && (path = getenv("HOME"))) {
+        char *prefix = av_asprintf("%s/.frei0r-1/lib/", path);
+        if (!prefix)
+            return AVERROR(ENOMEM);
+        ret = load_path(ctx, &s->dl_handle, prefix, dl_name);
+        av_free(prefix);
+        if (ret < 0)
+            return ret;
+    }
+    if (!s->dl_handle) {
+        ret = load_path(ctx, &s->dl_handle, "/usr/local/lib/frei0r-1/", dl_name);
+        if (ret < 0)
+            return ret;
     }
-    if (!frei0r->dl_handle && (path = getenv("HOME"))) {
-        char prefix[1024];
-        snprintf(prefix, sizeof(prefix), "%s/.frei0r-1/lib/", path);
-        frei0r->dl_handle = load_path(ctx, prefix, dl_name);
+    if (!s->dl_handle) {
+        ret = load_path(ctx, &s->dl_handle, "/usr/lib/frei0r-1/", dl_name);
+        if (ret < 0)
+            return ret;
     }
-    if (!frei0r->dl_handle)
-        frei0r->dl_handle = load_path(ctx, "/usr/local/lib/frei0r-1/", dl_name);
-    if (!frei0r->dl_handle)
-        frei0r->dl_handle = load_path(ctx, "/usr/lib/frei0r-1/", dl_name);
-    if (!frei0r->dl_handle) {
+    if (!s->dl_handle) {
         av_log(ctx, AV_LOG_ERROR, "Could not find module '%s'\n", dl_name);
         return AVERROR(EINVAL);
     }
 
     if (!(f0r_init                = load_sym(ctx, "f0r_init"           )) ||
         !(f0r_get_plugin_info     = load_sym(ctx, "f0r_get_plugin_info")) ||
-        !(frei0r->get_param_info  = load_sym(ctx, "f0r_get_param_info" )) ||
-        !(frei0r->get_param_value = load_sym(ctx, "f0r_get_param_value")) ||
-        !(frei0r->set_param_value = load_sym(ctx, "f0r_set_param_value")) ||
-        !(frei0r->update          = load_sym(ctx, "f0r_update"         )) ||
-        !(frei0r->construct       = load_sym(ctx, "f0r_construct"      )) ||
-        !(frei0r->destruct        = load_sym(ctx, "f0r_destruct"       )) ||
-        !(frei0r->deinit          = load_sym(ctx, "f0r_deinit"         )))
+        !(s->get_param_info  = load_sym(ctx, "f0r_get_param_info" )) ||
+        !(s->get_param_value = load_sym(ctx, "f0r_get_param_value")) ||
+        !(s->set_param_value = load_sym(ctx, "f0r_set_param_value")) ||
+        !(s->update          = load_sym(ctx, "f0r_update"         )) ||
+        !(s->construct       = load_sym(ctx, "f0r_construct"      )) ||
+        !(s->destruct        = load_sym(ctx, "f0r_destruct"       )) ||
+        !(s->deinit          = load_sym(ctx, "f0r_deinit"         )))
         return AVERROR(EINVAL);
 
     if (f0r_init() < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Could not init the frei0r module");
+        av_log(ctx, AV_LOG_ERROR, "Could not init the frei0r module\n");
         return AVERROR(EINVAL);
     }
 
-    f0r_get_plugin_info(&frei0r->plugin_info);
-    pi = &frei0r->plugin_info;
-    if (pi->plugin_type != F0R_PLUGIN_TYPE_FILTER) {
+    f0r_get_plugin_info(&s->plugin_info);
+    pi = &s->plugin_info;
+    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");
         return AVERROR(EINVAL);
     }
 
-    av_log(ctx, AV_LOG_INFO,
+    av_log(ctx, AV_LOG_VERBOSE,
            "name:%s author:'%s' explanation:'%s' color_model:%s "
            "frei0r_version:%d version:%d.%d num_params:%d\n",
            pi->name, pi->author, pi->explanation,
@@ -271,93 +329,202 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
     return 0;
 }
 
-static av_cold void uninit(AVFilterContext *ctx)
+static av_cold int filter_init(AVFilterContext *ctx)
 {
-    Frei0rContext *frei0r = ctx->priv;
+    Frei0rContext *s = ctx->priv;
 
-    if (frei0r->destruct)
-        frei0r->destruct(frei0r->instance);
-    if (frei0r->deinit)
-        frei0r->deinit();
-    if (frei0r->dl_handle)
-        dlclose(frei0r->dl_handle);
+    return frei0r_init(ctx, s->dl_name, F0R_PLUGIN_TYPE_FILTER);
+}
 
-    memset(frei0r, 0, sizeof(*frei0r));
+static av_cold void uninit(AVFilterContext *ctx)
+{
+    Frei0rContext *s = ctx->priv;
+
+    if (s->destruct && s->instance)
+        s->destruct(s->instance);
+    if (s->deinit)
+        s->deinit();
+    if (s->dl_handle)
+        dlclose(s->dl_handle);
 }
 
 static int config_input_props(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
-    Frei0rContext *frei0r = ctx->priv;
+    Frei0rContext *s = ctx->priv;
 
-    if (!(frei0r->instance = frei0r->construct(inlink->w, inlink->h))) {
-        av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance");
+    if (s->destruct && s->instance)
+        s->destruct(s->instance);
+    if (!(s->instance = s->construct(inlink->w, inlink->h))) {
+        av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance\n");
         return AVERROR(EINVAL);
     }
 
-    return set_params(ctx, frei0r->params);
+    return set_params(ctx, s->params);
 }
 
 static int query_formats(AVFilterContext *ctx)
 {
-    Frei0rContext *frei0r = ctx->priv;
+    Frei0rContext *s = ctx->priv;
     AVFilterFormats *formats = NULL;
 
-    if        (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_BGRA8888) {
-        avfilter_add_format(&formats, PIX_FMT_BGRA);
-    } else if (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_RGBA8888) {
-        avfilter_add_format(&formats, PIX_FMT_RGBA);
+    if        (s->plugin_info.color_model == F0R_COLOR_MODEL_BGRA8888) {
+        ff_add_format(&formats, AV_PIX_FMT_BGRA);
+    } else if (s->plugin_info.color_model == F0R_COLOR_MODEL_RGBA8888) {
+        ff_add_format(&formats, AV_PIX_FMT_RGBA);
     } else {                                   /* F0R_COLOR_MODEL_PACKED32 */
-        static const enum PixelFormat pix_fmts[] = {
-            PIX_FMT_BGRA, PIX_FMT_ARGB, PIX_FMT_ABGR, PIX_FMT_ARGB, PIX_FMT_NONE
+        static const enum AVPixelFormat pix_fmts[] = {
+            AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_ARGB, AV_PIX_FMT_NONE
         };
-        formats = avfilter_make_format_list(pix_fmts);
+        formats = ff_make_format_list(pix_fmts);
     }
 
     if (!formats)
         return AVERROR(ENOMEM);
 
-    avfilter_set_common_formats(ctx, formats);
+    ff_set_common_formats(ctx, formats);
     return 0;
 }
 
-static void null_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) { }
-
-static void end_frame(AVFilterLink *inlink)
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
-    Frei0rContext *frei0r = inlink->dst->priv;
+    Frei0rContext *s = inlink->dst->priv;
     AVFilterLink *outlink = inlink->dst->outputs[0];
-    AVFilterBufferRef  *inpicref =  inlink->cur_buf;
-    AVFilterBufferRef *outpicref = outlink->out_buf;
-
-    frei0r->update(frei0r->instance, (double)inpicref->pts / AV_TIME_BASE,
-                   (const uint32_t *)inpicref->data[0],
-                   (uint32_t *)outpicref->data[0]);
-    avfilter_unref_buffer(inpicref);
-    avfilter_draw_slice(outlink, 0, outlink->h, 1);
-    avfilter_end_frame(outlink);
-    avfilter_unref_buffer(outpicref);
+    AVFrame *out;
+
+    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+    if (!out) {
+        av_frame_free(&in);
+        return AVERROR(ENOMEM);
+    }
+    av_frame_copy_props(out, in);
+
+    s->update(s->instance, in->pts * av_q2d(inlink->time_base) * 1000,
+                   (const uint32_t *)in->data[0],
+                   (uint32_t *)out->data[0]);
+
+    av_frame_free(&in);
+
+    return ff_filter_frame(outlink, out);
+}
+
+#define OFFSET(x) offsetof(Frei0rContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
+static const AVOption frei0r_options[] = {
+    { "filter_name",   NULL, OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
+    { "filter_params", NULL, OFFSET(params),  AV_OPT_TYPE_STRING, .flags = FLAGS },
+    { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(frei0r);
+
+static const AVFilterPad avfilter_vf_frei0r_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .config_props = config_input_props,
+        .filter_frame = filter_frame,
+    },
+    { NULL }
+};
+
+static const AVFilterPad avfilter_vf_frei0r_outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_VIDEO,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_frei0r = {
+    .name          = "frei0r",
+    .description   = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
+    .query_formats = query_formats,
+    .init          = filter_init,
+    .uninit        = uninit,
+    .priv_size     = sizeof(Frei0rContext),
+    .priv_class    = &frei0r_class,
+    .inputs        = avfilter_vf_frei0r_inputs,
+    .outputs       = avfilter_vf_frei0r_outputs,
+};
+
+static av_cold int source_init(AVFilterContext *ctx)
+{
+    Frei0rContext *s = ctx->priv;
+
+    s->time_base.num = s->framerate.den;
+    s->time_base.den = s->framerate.num;
+
+    return frei0r_init(ctx, s->dl_name, F0R_PLUGIN_TYPE_SOURCE);
 }
 
-AVFilter avfilter_vf_frei0r = {
-    .name      = "frei0r",
-    .description = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
+static int source_config_props(AVFilterLink *outlink)
+{
+    AVFilterContext *ctx = outlink->src;
+    Frei0rContext *s = ctx->priv;
+
+    if (av_image_check_size(s->w, s->h, 0, ctx) < 0)
+        return AVERROR(EINVAL);
+    outlink->w = s->w;
+    outlink->h = s->h;
+    outlink->time_base = s->time_base;
+    outlink->sample_aspect_ratio = (AVRational){1,1};
+
+    if (s->destruct && s->instance)
+        s->destruct(s->instance);
+    if (!(s->instance = s->construct(outlink->w, outlink->h))) {
+        av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance\n");
+        return AVERROR(EINVAL);
+    }
+
+    return set_params(ctx, s->params);
+}
+
+static int source_request_frame(AVFilterLink *outlink)
+{
+    Frei0rContext *s = outlink->src->priv;
+    AVFrame *frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+
+    if (!frame)
+        return AVERROR(ENOMEM);
+
+    frame->sample_aspect_ratio = (AVRational) {1, 1};
+    frame->pts = s->pts++;
+
+    s->update(s->instance, av_rescale_q(frame->pts, s->time_base, (AVRational){1,1000}),
+                   NULL, (uint32_t *)frame->data[0]);
+
+    return ff_filter_frame(outlink, frame);
+}
+
+static const AVOption frei0r_src_options[] = {
+    { "size",          "Dimensions of the generated video.", OFFSET(w),         AV_OPT_TYPE_IMAGE_SIZE, { .str = "320x240" }, .flags = FLAGS },
+    { "framerate",     NULL,                                 OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, .flags = FLAGS },
+    { "filter_name",   NULL,                                 OFFSET(dl_name),   AV_OPT_TYPE_STRING,                  .flags = FLAGS },
+    { "filter_params", NULL,                                 OFFSET(params),    AV_OPT_TYPE_STRING,                  .flags = FLAGS },
+    { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(frei0r_src);
+
+static const AVFilterPad avfilter_vsrc_frei0r_src_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .request_frame = source_request_frame,
+        .config_props  = source_config_props
+    },
+    { NULL }
+};
 
+AVFilter ff_vsrc_frei0r_src = {
+    .name          = "frei0r_src",
+    .description   = NULL_IF_CONFIG_SMALL("Generate a frei0r source."),
+    .priv_size     = sizeof(Frei0rContext),
+    .priv_class    = &frei0r_src_class,
+    .init          = source_init,
+    .uninit        = uninit,
     .query_formats = query_formats,
-    .init = init,
-    .uninit = uninit,
-
-    .priv_size = sizeof(Frei0rContext),
-
-    .inputs    = (AVFilterPad[]) {{ .name             = "default",
-                                    .type             = AVMEDIA_TYPE_VIDEO,
-                                    .draw_slice       = null_draw_slice,
-                                    .config_props     = config_input_props,
-                                    .end_frame        = end_frame,
-                                    .min_perms        = AV_PERM_READ },
-                                  { .name = NULL}},
-
-    .outputs   = (AVFilterPad[]) {{ .name             = "default",
-                                    .type             = AVMEDIA_TYPE_VIDEO, },
-                                  { .name = NULL}},
+    .inputs        = NULL,
+    .outputs       = avfilter_vsrc_frei0r_src_outputs,
 };