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vf_frei0r: switch to an AVOptions-based system.

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This commit is contained in:
Anton Khirnov 2013-02-25 21:21:29 +01:00
parent f13ab29925
commit 5aa1a668cf
3 changed files with 108 additions and 53 deletions
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63
doc/filters.texi
View File

@ -1118,20 +1118,22 @@ Apply a frei0r effect to the input video.
To enable compilation of this filter you need to install the frei0r
header and configure Libav with --enable-frei0r.
The filter supports the syntax:
@example
@var{filter_name}[@{:|=@}@var{param1}:@var{param2}:...:@var{paramN}]
@end example
This filter accepts the following options:
@var{filter_name} is the name to the frei0r effect to load. If the
environment variable @env{FREI0R_PATH} is defined, the frei0r effect
is searched in each one of the directories specified by the colon
separated list in @env{FREIOR_PATH}, otherwise in the standard frei0r
paths, which are in this order: @file{HOME/.frei0r-1/lib/},
@file{/usr/local/lib/frei0r-1/}, @file{/usr/lib/frei0r-1/}.
@table @option
@var{param1}, @var{param2}, ... , @var{paramN} specify the parameters
for the frei0r effect.
@item filter_name
The name to the frei0r effect to load. If the environment variable
@env{FREI0R_PATH} is defined, the frei0r effect is searched in each one of the
directories specified by the colon separated list in @env{FREIOR_PATH},
otherwise in the standard frei0r paths, which are in this order:
@file{HOME/.frei0r-1/lib/}, @file{/usr/local/lib/frei0r-1/},
@file{/usr/lib/frei0r-1/}.
@item filter_params
A '|'-separated list of parameters to pass to the frei0r effect.
@end table
A frei0r effect parameter can be a boolean (whose values are specified
with "y" and "n"), a double, a color (specified by the syntax
@ -1146,7 +1148,7 @@ effect parameter is not specified the default value is set.
Some examples follow:
@example
# apply the distort0r effect, set the first two double parameters
frei0r=distort0r:0.5:0.01
frei0r=filter_name=distort0r:filter_params=0.5|0.01
# apply the colordistance effect, takes a color as first parameter
frei0r=colordistance:0.2/0.3/0.4
@ -1155,7 +1157,7 @@ frei0r=colordistance:0x112233
# apply the perspective effect, specify the top left and top right
# image positions
frei0r=perspective:0.2/0.2:0.8/0.2
frei0r=perspective:0.2/0.2|0.8/0.2
@end example
For more information see:
@ -2375,24 +2377,33 @@ Provide a frei0r source.
To enable compilation of this filter you need to install the frei0r
header and configure Libav with --enable-frei0r.
The source supports the syntax:
@example
@var{size}:@var{rate}:@var{src_name}[@{=|:@}@var{param1}:@var{param2}:...:@var{paramN}]
@end example
This source accepts the following options:
@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 @ref{frei0r} in the description of the video filters.
@table @option
@item size
The size of the video to generate, may be a string of the form
@var{width}x@var{height} or a frame size abbreviation.
@item framerate
Framerate of the generated video, may be a string of the form
@var{num}/@var{den} or a frame rate abbreviation.
@item filter_name
The name to the frei0r source to load. For more information regarding frei0r and
how to set the parameters read the section @ref{frei0r} in the description of
the video filters.
@item filter_params
A '|'-separated list of parameters to pass to the frei0r source.
@end table
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
frei0r_src=size=200x200:framerate=10:filter_name=partik0l:filter_params=1234 [overlay]; [in][overlay] overlay
@end example
@section rgbtestsrc, testsrc

23
libavfilter/avfilter.c
View File

@ -487,19 +487,36 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
if (ret < 0)
goto fail;
#if FF_API_OLD_FILTER_OPTS
} else if (!strcmp(filter->filter->name, "format") ||
!strcmp(filter->filter->name, "noformat")) {
} else if (!strcmp(filter->filter->name, "format") ||
!strcmp(filter->filter->name, "noformat") ||
!strcmp(filter->filter->name, "frei0r") ||
!strcmp(filter->filter->name, "frei0r_src")) {
/* a hack for compatibility with the old syntax
* replace colons with |s */
char *copy = av_strdup(args);
char *p = copy;
int nb_leading = 0; // number of leading colons to skip
if (!copy) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (strchr(copy, ':')) {
if (!strcmp(filter->filter->name, "frei0r"))
nb_leading = 1;
else if (!strcmp(filter->filter->name, "frei0r_src"))
nb_leading = 3;
while (nb_leading--) {
p = strchr(p, ':');
if (!p) {
p = copy + strlen(copy);
break;
}
p++;
}
if (strchr(p, ':')) {
av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
"'|' to separate the list items.\n");
}

75
libavfilter/vf_frei0r.c
View File

@ -35,6 +35,7 @@
#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"
@ -53,6 +54,7 @@ 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;
@ -64,7 +66,11 @@ typedef struct Frei0rContext {
f0r_construct_f construct;
f0r_destruct_f destruct;
f0r_deinit_f deinit;
char params[256];
char *dl_name;
char *params;
char *size;
char *framerate;
/* only used by the source */
int w, h;
@ -143,7 +149,7 @@ static int set_params(AVFilterContext *ctx, const char *params)
frei0r->get_param_info(&info, i);
if (*params) {
if (!(param = av_get_token(&params, ":")))
if (!(param = av_get_token(&params, "|")))
return AVERROR(ENOMEM);
params++; /* skip ':' */
ret = set_param(ctx, info, i, param);
@ -222,6 +228,11 @@ static av_cold int frei0r_init(AVFilterContext *ctx,
f0r_plugin_info_t *pi;
char *path;
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 */
if ((path = av_strdup(getenv("FREI0R_PATH")))) {
char *p, *ptr = NULL;
@ -287,13 +298,8 @@ static av_cold int frei0r_init(AVFilterContext *ctx,
static av_cold int filter_init(AVFilterContext *ctx, const char *args)
{
Frei0rContext *frei0r = ctx->priv;
char dl_name[1024], c;
*frei0r->params = 0;
if (args)
sscanf(args, "%1023[^:=]%c%255c", dl_name, &c, frei0r->params);
return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_FILTER);
return frei0r_init(ctx, frei0r->dl_name, F0R_PLUGIN_TYPE_FILTER);
}
static av_cold void uninit(AVFilterContext *ctx)
@ -306,8 +312,6 @@ static av_cold void uninit(AVFilterContext *ctx)
frei0r->deinit();
if (frei0r->dl_handle)
dlclose(frei0r->dl_handle);
memset(frei0r, 0, sizeof(*frei0r));
}
static int config_input_props(AVFilterLink *inlink)
@ -368,6 +372,21 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
return ff_filter_frame(outlink, out);
}
#define OFFSET(x) offsetof(Frei0rContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
static const AVOption filter_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 },
};
static const AVClass filter_class = {
.class_name = "frei0r",
.item_name = av_default_item_name,
.option = filter_options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad avfilter_vf_frei0r_inputs[] = {
{
.name = "default",
@ -395,6 +414,7 @@ AVFilter avfilter_vf_frei0r = {
.uninit = uninit,
.priv_size = sizeof(Frei0rContext),
.priv_class = &filter_class,
.inputs = avfilter_vf_frei0r_inputs,
@ -404,31 +424,22 @@ AVFilter avfilter_vf_frei0r = {
static av_cold int source_init(AVFilterContext *ctx, const char *args)
{
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);
if (av_parse_video_size(&frei0r->w, &frei0r->h, frei0r->size) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", frei0r->size);
return AVERROR(EINVAL);
}
if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0 ||
if (av_parse_video_rate(&frame_rate_q, frei0r->framerate) < 0 ||
frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", frame_rate);
av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", frei0r->framerate);
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);
return frei0r_init(ctx, frei0r->dl_name, F0R_PLUGIN_TYPE_SOURCE);
}
static int source_config_props(AVFilterLink *outlink)
@ -467,6 +478,21 @@ static int source_request_frame(AVFilterLink *outlink)
return ff_filter_frame(outlink, frame);
}
static const AVOption src_options[] = {
{ "size", "Dimensions of the generated video.", OFFSET(size), AV_OPT_TYPE_STRING, { .str = "" }, .flags = FLAGS },
{ "framerate", NULL, OFFSET(framerate), AV_OPT_TYPE_STRING, { .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 },
};
static const AVClass src_class = {
.class_name = "frei0r_src",
.item_name = av_default_item_name,
.option = src_options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad avfilter_vsrc_frei0r_src_outputs[] = {
{
.name = "default",
@ -482,6 +508,7 @@ AVFilter avfilter_vsrc_frei0r_src = {
.description = NULL_IF_CONFIG_SMALL("Generate a frei0r source."),
.priv_size = sizeof(Frei0rContext),
.priv_class = &src_class,
.init = source_init,
.uninit = uninit,