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libavfilter/vf_frei0r.c

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00001 /*
00002  * Copyright (c) 2010 Stefano Sabatini
00003  * This file is part of FFmpeg.
00004  *
00005  * FFmpeg is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU Lesser General Public
00007  * License as published by the Free Software Foundation; either
00008  * version 2.1 of the License, or (at your option) any later version.
00009  *
00010  * FFmpeg is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Lesser General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public
00016  * License along with FFmpeg; if not, write to the Free Software
00017  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00018  */
00019 
00025 /* #define DEBUG */
00026 
00027 #include <dlfcn.h>
00028 #include <frei0r.h>
00029 #include "libavutil/avstring.h"
00030 #include "libavutil/imgutils.h"
00031 #include "libavutil/parseutils.h"
00032 #include "avfilter.h"
00033 
00034 typedef f0r_instance_t (*f0r_construct_f)(unsigned int width, unsigned int height);
00035 typedef void (*f0r_destruct_f)(f0r_instance_t instance);
00036 typedef void (*f0r_deinit_f)(void);
00037 typedef int (*f0r_init_f)(void);
00038 typedef void (*f0r_get_plugin_info_f)(f0r_plugin_info_t *info);
00039 typedef void (*f0r_get_param_info_f)(f0r_param_info_t *info, int param_index);
00040 typedef void (*f0r_update_f)(f0r_instance_t instance, double time, const uint32_t *inframe, uint32_t *outframe);
00041 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);
00042 typedef void (*f0r_set_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
00043 typedef void (*f0r_get_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
00044 
00045 typedef struct Frei0rContext {
00046     f0r_update_f update;
00047     void *dl_handle;            /* dynamic library handle   */
00048     f0r_instance_t instance;
00049     f0r_plugin_info_t plugin_info;
00050 
00051     f0r_get_param_info_f  get_param_info;
00052     f0r_get_param_value_f get_param_value;
00053     f0r_set_param_value_f set_param_value;
00054     f0r_construct_f       construct;
00055     f0r_destruct_f        destruct;
00056     f0r_deinit_f          deinit;
00057     char params[256];
00058 
00059     /* only used by the source */
00060     int w, h;
00061     AVRational time_base;
00062     uint64_t pts;
00063 } Frei0rContext;
00064 
00065 static void *load_sym(AVFilterContext *ctx, const char *sym_name)
00066 {
00067     Frei0rContext *frei0r = ctx->priv;
00068     void *sym = dlsym(frei0r->dl_handle, sym_name);
00069     if (!sym)
00070         av_log(ctx, AV_LOG_ERROR, "Could not find symbol '%s' in loaded module\n", sym_name);
00071     return sym;
00072 }
00073 
00074 static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, char *param)
00075 {
00076     Frei0rContext *frei0r = ctx->priv;
00077     union {
00078         double d;
00079         f0r_param_color_t col;
00080         f0r_param_position_t pos;
00081     } val;
00082     char *tail;
00083     uint8_t rgba[4];
00084 
00085     switch (info.type) {
00086     case F0R_PARAM_BOOL:
00087         if      (!strcmp(param, "y")) val.d = 1.0;
00088         else if (!strcmp(param, "n")) val.d = 0.0;
00089         else goto fail;
00090         break;
00091 
00092     case F0R_PARAM_DOUBLE:
00093         val.d = strtod(param, &tail);
00094         if (*tail || val.d == HUGE_VAL)
00095             goto fail;
00096         break;
00097 
00098     case F0R_PARAM_COLOR:
00099         if (sscanf(param, "%f/%f/%f", &val.col.r, &val.col.g, &val.col.b) != 3) {
00100             if (av_parse_color(rgba, param, -1, ctx) < 0)
00101                 goto fail;
00102             val.col.r = rgba[0] / 255.0;
00103             val.col.g = rgba[1] / 255.0;
00104             val.col.b = rgba[2] / 255.0;
00105         }
00106         break;
00107 
00108     case F0R_PARAM_POSITION:
00109         if (sscanf(param, "%lf/%lf", &val.pos.x, &val.pos.y) != 2)
00110             goto fail;
00111         break;
00112     }
00113 
00114     frei0r->set_param_value(frei0r->instance, &val, index);
00115     return 0;
00116 
00117 fail:
00118     av_log(ctx, AV_LOG_ERROR, "Invalid value '%s' for parameter '%s'\n",
00119            param, info.name);
00120     return AVERROR(EINVAL);
00121 }
00122 
00123 static int set_params(AVFilterContext *ctx, const char *params)
00124 {
00125     Frei0rContext *frei0r = ctx->priv;
00126     int i;
00127 
00128     for (i = 0; i < frei0r->plugin_info.num_params; i++) {
00129         f0r_param_info_t info;
00130         char *param;
00131         int ret;
00132 
00133         frei0r->get_param_info(&info, i);
00134 
00135         if (*params) {
00136             if (!(param = av_get_token(&params, ":")))
00137                 return AVERROR(ENOMEM);
00138             params++;               /* skip ':' */
00139             ret = set_param(ctx, info, i, param);
00140             av_free(param);
00141             if (ret < 0)
00142                 return ret;
00143         }
00144 
00145         av_log(ctx, AV_LOG_INFO,
00146                "idx:%d name:'%s' type:%s explanation:'%s' ",
00147                i, info.name,
00148                info.type == F0R_PARAM_BOOL     ? "bool"     :
00149                info.type == F0R_PARAM_DOUBLE   ? "double"   :
00150                info.type == F0R_PARAM_COLOR    ? "color"    :
00151                info.type == F0R_PARAM_POSITION ? "position" :
00152                info.type == F0R_PARAM_STRING   ? "string"   : "unknown",
00153                info.explanation);
00154 
00155 #ifdef DEBUG
00156         av_log(ctx, AV_LOG_INFO, "value:");
00157         switch (info.type) {
00158             void *v;
00159             double d;
00160             char s[128];
00161             f0r_param_color_t col;
00162             f0r_param_position_t pos;
00163 
00164         case F0R_PARAM_BOOL:
00165             v = &d;
00166             frei0r->get_param_value(frei0r->instance, v, i);
00167             av_log(ctx, AV_LOG_INFO, "%s", d >= 0.5 && d <= 1.0 ? "y" : "n");
00168             break;
00169         case F0R_PARAM_DOUBLE:
00170             v = &d;
00171             frei0r->get_param_value(frei0r->instance, v, i);
00172             av_log(ctx, AV_LOG_INFO, "%f", d);
00173             break;
00174         case F0R_PARAM_COLOR:
00175             v = &col;
00176             frei0r->get_param_value(frei0r->instance, v, i);
00177             av_log(ctx, AV_LOG_INFO, "%f/%f/%f", col.r, col.g, col.b);
00178             break;
00179         case F0R_PARAM_POSITION:
00180             v = &pos;
00181             frei0r->get_param_value(frei0r->instance, v, i);
00182             av_log(ctx, AV_LOG_INFO, "%lf/%lf", pos.x, pos.y);
00183             break;
00184         default: /* F0R_PARAM_STRING */
00185             v = s;
00186             frei0r->get_param_value(frei0r->instance, v, i);
00187             av_log(ctx, AV_LOG_INFO, "'%s'\n", s);
00188             break;
00189         }
00190 #endif
00191         av_log(ctx, AV_LOG_INFO, "\n");
00192     }
00193 
00194     return 0;
00195 }
00196 
00197 static void *load_path(AVFilterContext *ctx, const char *prefix, const char *name)
00198 {
00199     char path[1024];
00200 
00201     snprintf(path, sizeof(path), "%s%s%s", prefix, name, SLIBSUF);
00202     av_log(ctx, AV_LOG_DEBUG, "Looking for frei0r effect in '%s'\n", path);
00203     return dlopen(path, RTLD_NOW|RTLD_LOCAL);
00204 }
00205 
00206 static av_cold int frei0r_init(AVFilterContext *ctx,
00207                                const char *dl_name, int type)
00208 {
00209     Frei0rContext *frei0r = ctx->priv;
00210     f0r_init_f            f0r_init;
00211     f0r_get_plugin_info_f f0r_get_plugin_info;
00212     f0r_plugin_info_t *pi;
00213     char *path;
00214 
00215     /* see: http://piksel.org/frei0r/1.2/spec/1.2/spec/group__pluglocations.html */
00216     if ((path = av_strdup(getenv("FREI0R_PATH")))) {
00217         char *p, *ptr = NULL;
00218         for (p = path; p = strtok_r(p, ":", &ptr); p = NULL)
00219             if (frei0r->dl_handle = load_path(ctx, p, dl_name))
00220                 break;
00221         av_free(path);
00222     }
00223     if (!frei0r->dl_handle && (path = getenv("HOME"))) {
00224         char prefix[1024];
00225         snprintf(prefix, sizeof(prefix), "%s/.frei0r-1/lib/", path);
00226         frei0r->dl_handle = load_path(ctx, prefix, dl_name);
00227     }
00228     if (!frei0r->dl_handle)
00229         frei0r->dl_handle = load_path(ctx, "/usr/local/lib/frei0r-1/", dl_name);
00230     if (!frei0r->dl_handle)
00231         frei0r->dl_handle = load_path(ctx, "/usr/lib/frei0r-1/", dl_name);
00232     if (!frei0r->dl_handle) {
00233         av_log(ctx, AV_LOG_ERROR, "Could not find module '%s'\n", dl_name);
00234         return AVERROR(EINVAL);
00235     }
00236 
00237     if (!(f0r_init                = load_sym(ctx, "f0r_init"           )) ||
00238         !(f0r_get_plugin_info     = load_sym(ctx, "f0r_get_plugin_info")) ||
00239         !(frei0r->get_param_info  = load_sym(ctx, "f0r_get_param_info" )) ||
00240         !(frei0r->get_param_value = load_sym(ctx, "f0r_get_param_value")) ||
00241         !(frei0r->set_param_value = load_sym(ctx, "f0r_set_param_value")) ||
00242         !(frei0r->update          = load_sym(ctx, "f0r_update"         )) ||
00243         !(frei0r->construct       = load_sym(ctx, "f0r_construct"      )) ||
00244         !(frei0r->destruct        = load_sym(ctx, "f0r_destruct"       )) ||
00245         !(frei0r->deinit          = load_sym(ctx, "f0r_deinit"         )))
00246         return AVERROR(EINVAL);
00247 
00248     if (f0r_init() < 0) {
00249         av_log(ctx, AV_LOG_ERROR, "Could not init the frei0r module");
00250         return AVERROR(EINVAL);
00251     }
00252 
00253     f0r_get_plugin_info(&frei0r->plugin_info);
00254     pi = &frei0r->plugin_info;
00255     if (pi->plugin_type != type) {
00256         av_log(ctx, AV_LOG_ERROR,
00257                "Invalid type '%s' for the plugin\n",
00258                pi->plugin_type == F0R_PLUGIN_TYPE_FILTER ? "filter" :
00259                pi->plugin_type == F0R_PLUGIN_TYPE_SOURCE ? "source" :
00260                pi->plugin_type == F0R_PLUGIN_TYPE_MIXER2 ? "mixer2" :
00261                pi->plugin_type == F0R_PLUGIN_TYPE_MIXER3 ? "mixer3" : "unknown");
00262         return AVERROR(EINVAL);
00263     }
00264 
00265     av_log(ctx, AV_LOG_INFO,
00266            "name:%s author:'%s' explanation:'%s' color_model:%s "
00267            "frei0r_version:%d version:%d.%d num_params:%d\n",
00268            pi->name, pi->author, pi->explanation,
00269            pi->color_model == F0R_COLOR_MODEL_BGRA8888 ? "bgra8888" :
00270            pi->color_model == F0R_COLOR_MODEL_RGBA8888 ? "rgba8888" :
00271            pi->color_model == F0R_COLOR_MODEL_PACKED32 ? "packed32" : "unknown",
00272            pi->frei0r_version, pi->major_version, pi->minor_version, pi->num_params);
00273 
00274     return 0;
00275 }
00276 
00277 static av_cold int filter_init(AVFilterContext *ctx, const char *args, void *opaque)
00278 {
00279     Frei0rContext *frei0r = ctx->priv;
00280     char dl_name[1024], c;
00281     *frei0r->params = 0;
00282 
00283     if (args)
00284         sscanf(args, "%1023[^:=]%c%255c", dl_name, &c, frei0r->params);
00285 
00286     return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_FILTER);
00287 }
00288 
00289 static av_cold void uninit(AVFilterContext *ctx)
00290 {
00291     Frei0rContext *frei0r = ctx->priv;
00292 
00293     if (frei0r->destruct && frei0r->instance)
00294         frei0r->destruct(frei0r->instance);
00295     if (frei0r->deinit)
00296         frei0r->deinit();
00297     if (frei0r->dl_handle)
00298         dlclose(frei0r->dl_handle);
00299 
00300     memset(frei0r, 0, sizeof(*frei0r));
00301 }
00302 
00303 static int config_input_props(AVFilterLink *inlink)
00304 {
00305     AVFilterContext *ctx = inlink->dst;
00306     Frei0rContext *frei0r = ctx->priv;
00307 
00308     if (!(frei0r->instance = frei0r->construct(inlink->w, inlink->h))) {
00309         av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance");
00310         return AVERROR(EINVAL);
00311     }
00312 
00313     return set_params(ctx, frei0r->params);
00314 }
00315 
00316 static int query_formats(AVFilterContext *ctx)
00317 {
00318     Frei0rContext *frei0r = ctx->priv;
00319     AVFilterFormats *formats = NULL;
00320 
00321     if        (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_BGRA8888) {
00322         avfilter_add_format(&formats, PIX_FMT_BGRA);
00323     } else if (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_RGBA8888) {
00324         avfilter_add_format(&formats, PIX_FMT_RGBA);
00325     } else {                                   /* F0R_COLOR_MODEL_PACKED32 */
00326         static const enum PixelFormat pix_fmts[] = {
00327             PIX_FMT_BGRA, PIX_FMT_ARGB, PIX_FMT_ABGR, PIX_FMT_ARGB, PIX_FMT_NONE
00328         };
00329         formats = avfilter_make_format_list(pix_fmts);
00330     }
00331 
00332     if (!formats)
00333         return AVERROR(ENOMEM);
00334 
00335     avfilter_set_common_pixel_formats(ctx, formats);
00336     return 0;
00337 }
00338 
00339 static void null_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) { }
00340 
00341 static void end_frame(AVFilterLink *inlink)
00342 {
00343     Frei0rContext *frei0r = inlink->dst->priv;
00344     AVFilterLink *outlink = inlink->dst->outputs[0];
00345     AVFilterBufferRef  *inpicref =  inlink->cur_buf;
00346     AVFilterBufferRef *outpicref = outlink->out_buf;
00347 
00348     frei0r->update(frei0r->instance, inpicref->pts * av_q2d(inlink->time_base) * 1000,
00349                    (const uint32_t *)inpicref->data[0],
00350                    (uint32_t *)outpicref->data[0]);
00351     avfilter_unref_buffer(inpicref);
00352     avfilter_draw_slice(outlink, 0, outlink->h, 1);
00353     avfilter_end_frame(outlink);
00354     avfilter_unref_buffer(outpicref);
00355 }
00356 
00357 AVFilter avfilter_vf_frei0r = {
00358     .name      = "frei0r",
00359     .description = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
00360 
00361     .query_formats = query_formats,
00362     .init = filter_init,
00363     .uninit = uninit,
00364 
00365     .priv_size = sizeof(Frei0rContext),
00366 
00367     .inputs    = (AVFilterPad[]) {{ .name             = "default",
00368                                     .type             = AVMEDIA_TYPE_VIDEO,
00369                                     .draw_slice       = null_draw_slice,
00370                                     .config_props     = config_input_props,
00371                                     .end_frame        = end_frame,
00372                                     .min_perms        = AV_PERM_READ },
00373                                   { .name = NULL}},
00374 
00375     .outputs   = (AVFilterPad[]) {{ .name             = "default",
00376                                     .type             = AVMEDIA_TYPE_VIDEO, },
00377                                   { .name = NULL}},
00378 };
00379 
00380 static av_cold int source_init(AVFilterContext *ctx, const char *args, void *opaque)
00381 {
00382     Frei0rContext *frei0r = ctx->priv;
00383     char dl_name[1024], c;
00384     char frame_size[128] = "";
00385     char frame_rate[128] = "";
00386     AVRational frame_rate_q;
00387 
00388     memset(frei0r->params, 0, sizeof(frei0r->params));
00389 
00390     if (args)
00391         sscanf(args, "%127[^:]:%127[^:]:%1023[^:=]%c%255c",
00392                frame_size, frame_rate, dl_name, &c, frei0r->params);
00393 
00394     if (av_parse_video_size(&frei0r->w, &frei0r->h, frame_size) < 0) {
00395         av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", frame_size);
00396         return AVERROR(EINVAL);
00397     }
00398 
00399     if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0 ||
00400         frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
00401         av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", frame_rate);
00402         return AVERROR(EINVAL);
00403     }
00404     frei0r->time_base.num = frame_rate_q.den;
00405     frei0r->time_base.den = frame_rate_q.num;
00406 
00407     return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_SOURCE);
00408 }
00409 
00410 static int source_config_props(AVFilterLink *outlink)
00411 {
00412     AVFilterContext *ctx = outlink->src;
00413     Frei0rContext *frei0r = ctx->priv;
00414 
00415     if (av_image_check_size(frei0r->w, frei0r->h, 0, ctx) < 0)
00416         return AVERROR(EINVAL);
00417     outlink->w = frei0r->w;
00418     outlink->h = frei0r->h;
00419     outlink->time_base = frei0r->time_base;
00420 
00421     if (!(frei0r->instance = frei0r->construct(outlink->w, outlink->h))) {
00422         av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance");
00423         return AVERROR(EINVAL);
00424     }
00425 
00426     return set_params(ctx, frei0r->params);
00427 }
00428 
00429 static int source_request_frame(AVFilterLink *outlink)
00430 {
00431     Frei0rContext *frei0r = outlink->src->priv;
00432     AVFilterBufferRef *picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
00433     picref->video->sample_aspect_ratio = (AVRational) {1, 1};
00434     picref->pts = frei0r->pts++;
00435     picref->pos = -1;
00436 
00437     avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
00438     frei0r->update(frei0r->instance, av_rescale_q(picref->pts, frei0r->time_base, (AVRational){1,1000}),
00439                    NULL, (uint32_t *)picref->data[0]);
00440     avfilter_draw_slice(outlink, 0, outlink->h, 1);
00441     avfilter_end_frame(outlink);
00442     avfilter_unref_buffer(picref);
00443 
00444     return 0;
00445 }
00446 
00447 AVFilter avfilter_vsrc_frei0r_src = {
00448     .name        = "frei0r_src",
00449     .description = NULL_IF_CONFIG_SMALL("Generate a frei0r source."),
00450 
00451     .priv_size = sizeof(Frei0rContext),
00452     .init      = source_init,
00453     .uninit    = uninit,
00454 
00455     .query_formats = query_formats,
00456 
00457     .inputs    = (AVFilterPad[]) {{ .name = NULL}},
00458 
00459     .outputs   = (AVFilterPad[]) {{ .name            = "default",
00460                                     .type            = AVMEDIA_TYPE_VIDEO,
00461                                     .request_frame   = source_request_frame,
00462                                     .config_props    = source_config_props },
00463                                   { .name = NULL}},
00464 };

Generated on Wed Apr 11 2012 07:31:36 for FFmpeg by  doxygen 1.7.1