yading@10: /*
yading@10:  * Copyright (c) 2010 Stefano Sabatini
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * frei0r wrapper
yading@10:  */
yading@10: 
yading@10: /* #define DEBUG */
yading@10: 
yading@10: #include <dlfcn.h>
yading@10: #include <frei0r.h>
yading@10: #include <stdio.h>
yading@10: #include <string.h>
yading@10: #include <stdlib.h>
yading@10: #include "config.h"
yading@10: #include "libavutil/avstring.h"
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "libavutil/internal.h"
yading@10: #include "libavutil/mathematics.h"
yading@10: #include "libavutil/mem.h"
yading@10: #include "libavutil/opt.h"
yading@10: #include "libavutil/parseutils.h"
yading@10: #include "avfilter.h"
yading@10: #include "formats.h"
yading@10: #include "internal.h"
yading@10: #include "video.h"
yading@10: 
yading@10: typedef f0r_instance_t (*f0r_construct_f)(unsigned int width, unsigned int height);
yading@10: typedef void (*f0r_destruct_f)(f0r_instance_t instance);
yading@10: typedef void (*f0r_deinit_f)(void);
yading@10: typedef int (*f0r_init_f)(void);
yading@10: typedef void (*f0r_get_plugin_info_f)(f0r_plugin_info_t *info);
yading@10: typedef void (*f0r_get_param_info_f)(f0r_param_info_t *info, int param_index);
yading@10: typedef void (*f0r_update_f)(f0r_instance_t instance, double time, const uint32_t *inframe, uint32_t *outframe);
yading@10: typedef void (*f0r_update2_f)(f0r_instance_t instance, double time, const uint32_t *inframe1, const uint32_t *inframe2, const uint32_t *inframe3, uint32_t *outframe);
yading@10: typedef void (*f0r_set_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
yading@10: typedef void (*f0r_get_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
yading@10: 
yading@10: typedef struct Frei0rContext {
yading@10:     const AVClass *class;
yading@10:     f0r_update_f update;
yading@10:     void *dl_handle;            /* dynamic library handle   */
yading@10:     f0r_instance_t instance;
yading@10:     f0r_plugin_info_t plugin_info;
yading@10: 
yading@10:     f0r_get_param_info_f  get_param_info;
yading@10:     f0r_get_param_value_f get_param_value;
yading@10:     f0r_set_param_value_f set_param_value;
yading@10:     f0r_construct_f       construct;
yading@10:     f0r_destruct_f        destruct;
yading@10:     f0r_deinit_f          deinit;
yading@10: 
yading@10:     char *dl_name;
yading@10:     char *params;
yading@10:     char *size;
yading@10:     char *framerate;
yading@10: 
yading@10:     /* only used by the source */
yading@10:     int w, h;
yading@10:     AVRational time_base;
yading@10:     uint64_t pts;
yading@10: } Frei0rContext;
yading@10: 
yading@10: static void *load_sym(AVFilterContext *ctx, const char *sym_name)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10:     void *sym = dlsym(frei0r->dl_handle, sym_name);
yading@10:     if (!sym)
yading@10:         av_log(ctx, AV_LOG_ERROR, "Could not find symbol '%s' in loaded module\n", sym_name);
yading@10:     return sym;
yading@10: }
yading@10: 
yading@10: static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, char *param)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10:     union {
yading@10:         double d;
yading@10:         f0r_param_color_t col;
yading@10:         f0r_param_position_t pos;
yading@10:     } val;
yading@10:     char *tail;
yading@10:     uint8_t rgba[4];
yading@10: 
yading@10:     switch (info.type) {
yading@10:     case F0R_PARAM_BOOL:
yading@10:         if      (!strcmp(param, "y")) val.d = 1.0;
yading@10:         else if (!strcmp(param, "n")) val.d = 0.0;
yading@10:         else goto fail;
yading@10:         break;
yading@10: 
yading@10:     case F0R_PARAM_DOUBLE:
yading@10:         val.d = strtod(param, &tail);
yading@10:         if (*tail || val.d == HUGE_VAL)
yading@10:             goto fail;
yading@10:         break;
yading@10: 
yading@10:     case F0R_PARAM_COLOR:
yading@10:         if (sscanf(param, "%f/%f/%f", &val.col.r, &val.col.g, &val.col.b) != 3) {
yading@10:             if (av_parse_color(rgba, param, -1, ctx) < 0)
yading@10:                 goto fail;
yading@10:             val.col.r = rgba[0] / 255.0;
yading@10:             val.col.g = rgba[1] / 255.0;
yading@10:             val.col.b = rgba[2] / 255.0;
yading@10:         }
yading@10:         break;
yading@10: 
yading@10:     case F0R_PARAM_POSITION:
yading@10:         if (sscanf(param, "%lf/%lf", &val.pos.x, &val.pos.y) != 2)
yading@10:             goto fail;
yading@10:         break;
yading@10:     }
yading@10: 
yading@10:     frei0r->set_param_value(frei0r->instance, &val, index);
yading@10:     return 0;
yading@10: 
yading@10: fail:
yading@10:     av_log(ctx, AV_LOG_ERROR, "Invalid value '%s' for parameter '%s'\n",
yading@10:            param, info.name);
yading@10:     return AVERROR(EINVAL);
yading@10: }
yading@10: 
yading@10: static int set_params(AVFilterContext *ctx, const char *params)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10:     int i;
yading@10: 
yading@10:     for (i = 0; i < frei0r->plugin_info.num_params; i++) {
yading@10:         f0r_param_info_t info;
yading@10:         char *param;
yading@10:         int ret;
yading@10: 
yading@10:         frei0r->get_param_info(&info, i);
yading@10: 
yading@10:         if (*params) {
yading@10:             if (!(param = av_get_token(&params, "|")))
yading@10:                 return AVERROR(ENOMEM);
yading@10:             params++;               /* skip ':' */
yading@10:             ret = set_param(ctx, info, i, param);
yading@10:             av_free(param);
yading@10:             if (ret < 0)
yading@10:                 return ret;
yading@10:         }
yading@10: 
yading@10:         av_log(ctx, AV_LOG_VERBOSE,
yading@10:                "idx:%d name:'%s' type:%s explanation:'%s' ",
yading@10:                i, info.name,
yading@10:                info.type == F0R_PARAM_BOOL     ? "bool"     :
yading@10:                info.type == F0R_PARAM_DOUBLE   ? "double"   :
yading@10:                info.type == F0R_PARAM_COLOR    ? "color"    :
yading@10:                info.type == F0R_PARAM_POSITION ? "position" :
yading@10:                info.type == F0R_PARAM_STRING   ? "string"   : "unknown",
yading@10:                info.explanation);
yading@10: 
yading@10: #ifdef DEBUG
yading@10:         av_log(ctx, AV_LOG_DEBUG, "value:");
yading@10:         switch (info.type) {
yading@10:             void *v;
yading@10:             double d;
yading@10:             char s[128];
yading@10:             f0r_param_color_t col;
yading@10:             f0r_param_position_t pos;
yading@10: 
yading@10:         case F0R_PARAM_BOOL:
yading@10:             v = &d;
yading@10:             frei0r->get_param_value(frei0r->instance, v, i);
yading@10:             av_log(ctx, AV_LOG_DEBUG, "%s", d >= 0.5 && d <= 1.0 ? "y" : "n");
yading@10:             break;
yading@10:         case F0R_PARAM_DOUBLE:
yading@10:             v = &d;
yading@10:             frei0r->get_param_value(frei0r->instance, v, i);
yading@10:             av_log(ctx, AV_LOG_DEBUG, "%f", d);
yading@10:             break;
yading@10:         case F0R_PARAM_COLOR:
yading@10:             v = &col;
yading@10:             frei0r->get_param_value(frei0r->instance, v, i);
yading@10:             av_log(ctx, AV_LOG_DEBUG, "%f/%f/%f", col.r, col.g, col.b);
yading@10:             break;
yading@10:         case F0R_PARAM_POSITION:
yading@10:             v = &pos;
yading@10:             frei0r->get_param_value(frei0r->instance, v, i);
yading@10:             av_log(ctx, AV_LOG_DEBUG, "%f/%f", pos.x, pos.y);
yading@10:             break;
yading@10:         default: /* F0R_PARAM_STRING */
yading@10:             v = s;
yading@10:             frei0r->get_param_value(frei0r->instance, v, i);
yading@10:             av_log(ctx, AV_LOG_DEBUG, "'%s'\n", s);
yading@10:             break;
yading@10:         }
yading@10: #endif
yading@10:         av_log(ctx, AV_LOG_VERBOSE, "\n");
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int load_path(AVFilterContext *ctx, void **handle_ptr, const char *prefix, const char *name)
yading@10: {
yading@10:     char *path = av_asprintf("%s%s%s", prefix, name, SLIBSUF);
yading@10:     if (!path)
yading@10:         return AVERROR(ENOMEM);
yading@10:     av_log(ctx, AV_LOG_DEBUG, "Looking for frei0r effect in '%s'\n", path);
yading@10:     *handle_ptr = dlopen(path, RTLD_NOW|RTLD_LOCAL);
yading@10:     av_free(path);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int frei0r_init(AVFilterContext *ctx,
yading@10:                                const char *dl_name, int type)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10:     f0r_init_f            f0r_init;
yading@10:     f0r_get_plugin_info_f f0r_get_plugin_info;
yading@10:     f0r_plugin_info_t *pi;
yading@10:     char *path;
yading@10:     int ret = 0;
yading@10: 
yading@10:     if (!dl_name) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "No filter name provided.\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     /* see: http://frei0r.dyne.org/codedoc/html/group__pluglocations.html */
yading@10:     if ((path = av_strdup(getenv("FREI0R_PATH")))) {
yading@10: #ifdef _WIN32
yading@10:         const char *separator = ";";
yading@10: #else
yading@10:         const char *separator = ":";
yading@10: #endif
yading@10:         char *p, *ptr = NULL;
yading@10:         for (p = path; p = av_strtok(p, separator, &ptr); p = NULL) {
yading@10:             /* add additional trailing slash in case it is missing */
yading@10:             char *p1 = av_asprintf("%s/", p);
yading@10:             if (!p1) {
yading@10:                 ret = AVERROR(ENOMEM);
yading@10:                 goto check_path_end;
yading@10:             }
yading@10:             ret = load_path(ctx, &frei0r->dl_handle, p1, dl_name);
yading@10:             av_free(p1);
yading@10:             if (ret < 0)
yading@10:                 goto check_path_end;
yading@10:             if (frei0r->dl_handle)
yading@10:                 break;
yading@10:         }
yading@10: 
yading@10:     check_path_end:
yading@10:         av_free(path);
yading@10:         if (ret < 0)
yading@10:             return ret;
yading@10:     }
yading@10:     if (!frei0r->dl_handle && (path = getenv("HOME"))) {
yading@10:         char *prefix = av_asprintf("%s/.frei0r-1/lib/", path);
yading@10:         if (!prefix)
yading@10:             return AVERROR(ENOMEM);
yading@10:         ret = load_path(ctx, &frei0r->dl_handle, prefix, dl_name);
yading@10:         av_free(prefix);
yading@10:         if (ret < 0)
yading@10:             return ret;
yading@10:     }
yading@10:     if (!frei0r->dl_handle) {
yading@10:         ret = load_path(ctx, &frei0r->dl_handle, "/usr/local/lib/frei0r-1/", dl_name);
yading@10:         if (ret < 0)
yading@10:             return ret;
yading@10:     }
yading@10:     if (!frei0r->dl_handle) {
yading@10:         ret = load_path(ctx, &frei0r->dl_handle, "/usr/lib/frei0r-1/", dl_name);
yading@10:         if (ret < 0)
yading@10:             return ret;
yading@10:     }
yading@10:     if (!frei0r->dl_handle) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "Could not find module '%s'\n", dl_name);
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if (!(f0r_init                = load_sym(ctx, "f0r_init"           )) ||
yading@10:         !(f0r_get_plugin_info     = load_sym(ctx, "f0r_get_plugin_info")) ||
yading@10:         !(frei0r->get_param_info  = load_sym(ctx, "f0r_get_param_info" )) ||
yading@10:         !(frei0r->get_param_value = load_sym(ctx, "f0r_get_param_value")) ||
yading@10:         !(frei0r->set_param_value = load_sym(ctx, "f0r_set_param_value")) ||
yading@10:         !(frei0r->update          = load_sym(ctx, "f0r_update"         )) ||
yading@10:         !(frei0r->construct       = load_sym(ctx, "f0r_construct"      )) ||
yading@10:         !(frei0r->destruct        = load_sym(ctx, "f0r_destruct"       )) ||
yading@10:         !(frei0r->deinit          = load_sym(ctx, "f0r_deinit"         )))
yading@10:         return AVERROR(EINVAL);
yading@10: 
yading@10:     if (f0r_init() < 0) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "Could not init the frei0r module\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     f0r_get_plugin_info(&frei0r->plugin_info);
yading@10:     pi = &frei0r->plugin_info;
yading@10:     if (pi->plugin_type != type) {
yading@10:         av_log(ctx, AV_LOG_ERROR,
yading@10:                "Invalid type '%s' for the plugin\n",
yading@10:                pi->plugin_type == F0R_PLUGIN_TYPE_FILTER ? "filter" :
yading@10:                pi->plugin_type == F0R_PLUGIN_TYPE_SOURCE ? "source" :
yading@10:                pi->plugin_type == F0R_PLUGIN_TYPE_MIXER2 ? "mixer2" :
yading@10:                pi->plugin_type == F0R_PLUGIN_TYPE_MIXER3 ? "mixer3" : "unknown");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     av_log(ctx, AV_LOG_VERBOSE,
yading@10:            "name:%s author:'%s' explanation:'%s' color_model:%s "
yading@10:            "frei0r_version:%d version:%d.%d num_params:%d\n",
yading@10:            pi->name, pi->author, pi->explanation,
yading@10:            pi->color_model == F0R_COLOR_MODEL_BGRA8888 ? "bgra8888" :
yading@10:            pi->color_model == F0R_COLOR_MODEL_RGBA8888 ? "rgba8888" :
yading@10:            pi->color_model == F0R_COLOR_MODEL_PACKED32 ? "packed32" : "unknown",
yading@10:            pi->frei0r_version, pi->major_version, pi->minor_version, pi->num_params);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int filter_init(AVFilterContext *ctx)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10: 
yading@10:     return frei0r_init(ctx, frei0r->dl_name, F0R_PLUGIN_TYPE_FILTER);
yading@10: }
yading@10: 
yading@10: static av_cold void uninit(AVFilterContext *ctx)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10: 
yading@10:     if (frei0r->destruct && frei0r->instance)
yading@10:         frei0r->destruct(frei0r->instance);
yading@10:     if (frei0r->deinit)
yading@10:         frei0r->deinit();
yading@10:     if (frei0r->dl_handle)
yading@10:         dlclose(frei0r->dl_handle);
yading@10: }
yading@10: 
yading@10: static int config_input_props(AVFilterLink *inlink)
yading@10: {
yading@10:     AVFilterContext *ctx = inlink->dst;
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10: 
yading@10:     if (!(frei0r->instance = frei0r->construct(inlink->w, inlink->h))) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     return set_params(ctx, frei0r->params);
yading@10: }
yading@10: 
yading@10: static int query_formats(AVFilterContext *ctx)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10:     AVFilterFormats *formats = NULL;
yading@10: 
yading@10:     if        (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_BGRA8888) {
yading@10:         ff_add_format(&formats, AV_PIX_FMT_BGRA);
yading@10:     } else if (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_RGBA8888) {
yading@10:         ff_add_format(&formats, AV_PIX_FMT_RGBA);
yading@10:     } else {                                   /* F0R_COLOR_MODEL_PACKED32 */
yading@10:         static const enum AVPixelFormat pix_fmts[] = {
yading@10:             AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_ARGB, AV_PIX_FMT_NONE
yading@10:         };
yading@10:         formats = ff_make_format_list(pix_fmts);
yading@10:     }
yading@10: 
yading@10:     if (!formats)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     ff_set_common_formats(ctx, formats);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *in)
yading@10: {
yading@10:     Frei0rContext *frei0r = inlink->dst->priv;
yading@10:     AVFilterLink *outlink = inlink->dst->outputs[0];
yading@10:     AVFrame *out;
yading@10: 
yading@10:     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
yading@10:     if (!out) {
yading@10:         av_frame_free(&in);
yading@10:         return AVERROR(ENOMEM);
yading@10:     }
yading@10:     av_frame_copy_props(out, in);
yading@10: 
yading@10:     frei0r->update(frei0r->instance, in->pts * av_q2d(inlink->time_base) * 1000,
yading@10:                    (const uint32_t *)in->data[0],
yading@10:                    (uint32_t *)out->data[0]);
yading@10: 
yading@10:     av_frame_free(&in);
yading@10: 
yading@10:     return ff_filter_frame(outlink, out);
yading@10: }
yading@10: 
yading@10: #define OFFSET(x) offsetof(Frei0rContext, x)
yading@10: #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
yading@10: static const AVOption filter_options[] = {
yading@10:     { "filter_name",   NULL, OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
yading@10:     { "filter_params", NULL, OFFSET(params),  AV_OPT_TYPE_STRING, .flags = FLAGS },
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: static const AVClass filter_class = {
yading@10:     .class_name = "frei0r",
yading@10:     .item_name  = av_default_item_name,
yading@10:     .option     = filter_options,
yading@10:     .version    = LIBAVUTIL_VERSION_INT,
yading@10: };
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_frei0r_inputs[] = {
yading@10:     {
yading@10:         .name         = "default",
yading@10:         .type         = AVMEDIA_TYPE_VIDEO,
yading@10:         .config_props = config_input_props,
yading@10:         .filter_frame = filter_frame,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_frei0r_outputs[] = {
yading@10:     {
yading@10:         .name = "default",
yading@10:         .type = AVMEDIA_TYPE_VIDEO,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_vf_frei0r = {
yading@10:     .name      = "frei0r",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
yading@10: 
yading@10:     .query_formats = query_formats,
yading@10:     .init = filter_init,
yading@10:     .uninit = uninit,
yading@10: 
yading@10:     .priv_size = sizeof(Frei0rContext),
yading@10:     .priv_class = &filter_class,
yading@10: 
yading@10:     .inputs    = avfilter_vf_frei0r_inputs,
yading@10: 
yading@10:     .outputs   = avfilter_vf_frei0r_outputs,
yading@10: };
yading@10: 
yading@10: static av_cold int source_init(AVFilterContext *ctx)
yading@10: {
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10:     AVRational frame_rate_q;
yading@10: 
yading@10:     if (av_parse_video_size(&frei0r->w, &frei0r->h, frei0r->size) < 0) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", frei0r->size);
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if (av_parse_video_rate(&frame_rate_q, frei0r->framerate) < 0) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", frei0r->framerate);
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10:     frei0r->time_base.num = frame_rate_q.den;
yading@10:     frei0r->time_base.den = frame_rate_q.num;
yading@10: 
yading@10:     return frei0r_init(ctx, frei0r->dl_name, F0R_PLUGIN_TYPE_SOURCE);
yading@10: }
yading@10: 
yading@10: static int source_config_props(AVFilterLink *outlink)
yading@10: {
yading@10:     AVFilterContext *ctx = outlink->src;
yading@10:     Frei0rContext *frei0r = ctx->priv;
yading@10: 
yading@10:     if (av_image_check_size(frei0r->w, frei0r->h, 0, ctx) < 0)
yading@10:         return AVERROR(EINVAL);
yading@10:     outlink->w = frei0r->w;
yading@10:     outlink->h = frei0r->h;
yading@10:     outlink->time_base = frei0r->time_base;
yading@10:     outlink->sample_aspect_ratio = (AVRational){1,1};
yading@10: 
yading@10:     if (!(frei0r->instance = frei0r->construct(outlink->w, outlink->h))) {
yading@10:         av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     return set_params(ctx, frei0r->params);
yading@10: }
yading@10: 
yading@10: static int source_request_frame(AVFilterLink *outlink)
yading@10: {
yading@10:     Frei0rContext *frei0r = outlink->src->priv;
yading@10:     AVFrame *frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
yading@10: 
yading@10:     if (!frame)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     frame->sample_aspect_ratio = (AVRational) {1, 1};
yading@10:     frame->pts = frei0r->pts++;
yading@10: 
yading@10:     frei0r->update(frei0r->instance, av_rescale_q(frame->pts, frei0r->time_base, (AVRational){1,1000}),
yading@10:                    NULL, (uint32_t *)frame->data[0]);
yading@10: 
yading@10:     return ff_filter_frame(outlink, frame);
yading@10: }
yading@10: 
yading@10: static const AVOption src_options[] = {
yading@10:     { "size",          "Dimensions of the generated video.", OFFSET(size),      AV_OPT_TYPE_STRING, { .str = "" },   .flags = FLAGS },
yading@10:     { "framerate",     NULL,                                 OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = FLAGS },
yading@10:     { "filter_name",   NULL,                                 OFFSET(dl_name),   AV_OPT_TYPE_STRING,                  .flags = FLAGS },
yading@10:     { "filter_params", NULL,                                 OFFSET(params),    AV_OPT_TYPE_STRING,                  .flags = FLAGS },
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: static const AVClass src_class = {
yading@10:     .class_name = "frei0r_src",
yading@10:     .item_name  = av_default_item_name,
yading@10:     .option     = src_options,
yading@10:     .version    = LIBAVUTIL_VERSION_INT,
yading@10: };
yading@10: 
yading@10: static const AVFilterPad avfilter_vsrc_frei0r_src_outputs[] = {
yading@10:     {
yading@10:         .name          = "default",
yading@10:         .type          = AVMEDIA_TYPE_VIDEO,
yading@10:         .request_frame = source_request_frame,
yading@10:         .config_props  = source_config_props
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_vsrc_frei0r_src = {
yading@10:     .name        = "frei0r_src",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Generate a frei0r source."),
yading@10: 
yading@10:     .priv_size = sizeof(Frei0rContext),
yading@10:     .priv_class = &src_class,
yading@10:     .init      = source_init,
yading@10:     .uninit    = uninit,
yading@10: 
yading@10:     .query_formats = query_formats,
yading@10: 
yading@10:     .inputs    = NULL,
yading@10: 
yading@10:     .outputs   = avfilter_vsrc_frei0r_src_outputs,
yading@10: };