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FFmpeg/libavfilter/vf_frei0r.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

512 lines
16 KiB
C

/*
* Copyright (c) 2010 Stefano Sabatini
* This file is part of FFmpeg.
*
* 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.
*
* 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* frei0r wrapper
*/
#include <frei0r.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "config.h"
#include "compat/w32dlfcn.h"
#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/eval.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 "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);
typedef void (*f0r_deinit_f)(void);
typedef int (*f0r_init_f)(void);
typedef void (*f0r_get_plugin_info_f)(f0r_plugin_info_t *info);
typedef void (*f0r_get_param_info_f)(f0r_param_info_t *info, int param_index);
typedef void (*f0r_update_f)(f0r_instance_t instance, double time, const uint32_t *inframe, uint32_t *outframe);
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);
typedef void (*f0r_set_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
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;
f0r_plugin_info_t plugin_info;
f0r_get_param_info_f get_param_info;
f0r_get_param_value_f get_param_value;
f0r_set_param_value_f set_param_value;
f0r_construct_f construct;
f0r_destruct_f destruct;
f0r_deinit_f deinit;
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 *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;
}
static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, char *param)
{
Frei0rContext *s = ctx->priv;
union {
double d;
f0r_param_color_t col;
f0r_param_position_t pos;
f0r_param_string str;
} val;
char *tail;
uint8_t rgba[4];
switch (info.type) {
case F0R_PARAM_BOOL:
if (!strcmp(param, "y")) val.d = 1.0;
else if (!strcmp(param, "n")) val.d = 0.0;
else goto fail;
break;
case F0R_PARAM_DOUBLE:
val.d = av_strtod(param, &tail);
if (*tail || val.d == HUGE_VAL)
goto fail;
break;
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, -1, ctx) < 0)
goto fail;
val.col.r = rgba[0] / 255.0;
val.col.g = rgba[1] / 255.0;
val.col.b = rgba[2] / 255.0;
}
break;
case F0R_PARAM_POSITION:
if (sscanf(param, "%lf/%lf", &val.pos.x, &val.pos.y) != 2)
goto fail;
break;
case F0R_PARAM_STRING:
val.str = param;
break;
}
s->set_param_value(s->instance, &val, index);
return 0;
fail:
av_log(ctx, AV_LOG_ERROR, "Invalid value '%s' for parameter '%s'.\n",
param, info.name);
return AVERROR(EINVAL);
}
static int set_params(AVFilterContext *ctx, const char *params)
{
Frei0rContext *s = ctx->priv;
int i;
if (!params)
return 0;
for (i = 0; i < s->plugin_info.num_params; i++) {
f0r_param_info_t info;
char *param;
int ret;
s->get_param_info(&info, i);
if (*params) {
if (!(param = av_get_token(&params, "|")))
return AVERROR(ENOMEM);
if (*params)
params++; /* skip ':' */
ret = set_param(ctx, info, i, param);
av_free(param);
if (ret < 0)
return ret;
}
}
return 0;
}
static int load_path(AVFilterContext *ctx, void **handle_ptr, const char *prefix, const char *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);
*handle_ptr = dlopen(path, RTLD_NOW|RTLD_LOCAL);
av_free(path);
return 0;
}
static av_cold int frei0r_init(AVFilterContext *ctx,
const char *dl_name, int type)
{
Frei0rContext *s = ctx->priv;
f0r_init_f f0r_init;
f0r_get_plugin_info_f f0r_get_plugin_info;
f0r_plugin_info_t *pi;
char *path;
int ret = 0;
int i;
static const char* const frei0r_pathlist[] = {
"/usr/local/lib/frei0r-1/",
"/usr/lib/frei0r-1/",
"/usr/local/lib64/frei0r-1/",
"/usr/lib64/frei0r-1/"
};
if (!dl_name) {
av_log(ctx, AV_LOG_ERROR, "No filter name provided.\n");
return AVERROR(EINVAL);
}
/* 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 = 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;
}
for (i = 0; !s->dl_handle && i < FF_ARRAY_ELEMS(frei0r_pathlist); i++) {
ret = load_path(ctx, &s->dl_handle, frei0r_pathlist[i], dl_name);
if (ret < 0)
return ret;
}
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")) ||
!(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.\n");
return AVERROR(EINVAL);
}
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 this 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_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,
pi->color_model == F0R_COLOR_MODEL_BGRA8888 ? "bgra8888" :
pi->color_model == F0R_COLOR_MODEL_RGBA8888 ? "rgba8888" :
pi->color_model == F0R_COLOR_MODEL_PACKED32 ? "packed32" : "unknown",
pi->frei0r_version, pi->major_version, pi->minor_version, pi->num_params);
return 0;
}
static av_cold int filter_init(AVFilterContext *ctx)
{
Frei0rContext *s = ctx->priv;
return frei0r_init(ctx, s->dl_name, F0R_PLUGIN_TYPE_FILTER);
}
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 *s = ctx->priv;
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, s->params);
}
static int query_formats(AVFilterContext *ctx)
{
Frei0rContext *s = ctx->priv;
AVFilterFormats *formats = NULL;
int ret;
if (s->plugin_info.color_model == F0R_COLOR_MODEL_BGRA8888) {
if ((ret = ff_add_format(&formats, AV_PIX_FMT_BGRA)) < 0)
return ret;
} else if (s->plugin_info.color_model == F0R_COLOR_MODEL_RGBA8888) {
if ((ret = ff_add_format(&formats, AV_PIX_FMT_RGBA)) < 0)
return ret;
} else { /* F0R_COLOR_MODEL_PACKED32 */
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_NONE
};
formats = ff_make_format_list(pix_fmts);
}
if (!formats)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, formats);
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
Frei0rContext *s = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
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);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
Frei0rContext *s = ctx->priv;
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return set_params(ctx, s->params);
}
#define OFFSET(x) offsetof(Frei0rContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_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 = TFLAGS },
{ 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,
},
};
static const AVFilterPad avfilter_vf_frei0r_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_frei0r = {
.name = "frei0r",
.description = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
.init = filter_init,
.uninit = uninit,
.priv_size = sizeof(Frei0rContext),
.priv_class = &frei0r_class,
FILTER_INPUTS(avfilter_vf_frei0r_inputs),
FILTER_OUTPUTS(avfilter_vf_frei0r_outputs),
FILTER_QUERY_FUNC(query_formats),
.process_command = process_command,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
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);
}
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->frame_rate = av_inv_q(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);
}
if (!s->params) {
av_log(ctx, AV_LOG_ERROR, "frei0r filter parameters not set.\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" }, 0, INT_MAX, .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
},
};
const 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,
.inputs = NULL,
FILTER_OUTPUTS(avfilter_vsrc_frei0r_src_outputs),
FILTER_QUERY_FUNC(query_formats),
};