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/*****************************************************************************
* sharpen.c: VDPAU sharpen video filter
*****************************************************************************
* Copyright (C) 2013 Rémi Denis-Courmont
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_filter.h>
#include <vlc_atomic.h>
#include "vlc_vdpau.h"
struct filter_sys_t
{
atomic_uint_fast32_t sigma;
};
static float vlc_to_vdp_sigma(float sigma)
{
sigma /= 2.f;
if (sigma > +1.f)
sigma = +1.f;
if (sigma < -1.f)
sigma = -1.f;
return sigma;
}
static int SharpenCallback(vlc_object_t *obj, const char *varname,
vlc_value_t prev, vlc_value_t cur, void *data)
{
filter_sys_t *sys = data;
union { uint32_t u; float f; } u;
u.f = vlc_to_vdp_sigma(cur.f_float);
atomic_store(&sys->sigma, u.u);
(void) obj; (void) varname; (void) prev;
return VLC_SUCCESS;
}
static picture_t *Sharpen(filter_t *filter, picture_t *pic)
{
filter_sys_t *sys = filter->p_sys;
vlc_vdp_video_field_t *f = pic->context;
union { uint32_t u; float f; } u;
if (unlikely(f == NULL))
return pic;
u.u = atomic_load(&sys->sigma);
f->sharpen += u.f;
if (f->sharpen > +1.f)
f->sharpen = +1.f;
if (f->sharpen < -1.f)
f->sharpen = -1.f;
return pic;
}
static const char *const options[] = { "sigma", NULL };
static int Open(vlc_object_t *obj)
{
filter_t *filter = (filter_t *)obj;
if (filter->fmt_in.video.i_chroma != VLC_CODEC_VDPAU_VIDEO_422
&& filter->fmt_in.video.i_chroma != VLC_CODEC_VDPAU_VIDEO_420)
return VLC_EGENERIC;
if (!video_format_IsSimilar(&filter->fmt_in.video, &filter->fmt_out.video))
return VLC_EGENERIC;
/* Check for sharpen support */
vdp_t *vdp;
VdpDevice device;
VdpStatus err;
VdpBool ok;
err = vdp_get_x11(NULL, -1, &vdp, &device);
if (err != VDP_STATUS_OK)
return VLC_EGENERIC; /* Weird. The decoder should be active... */
err = vdp_video_mixer_query_feature_support(vdp, device,
VDP_VIDEO_MIXER_FEATURE_SHARPNESS, &ok);
if (err != VDP_STATUS_OK)
ok = VDP_FALSE;
vdp_release_x11(vdp);
if (ok != VDP_TRUE)
{
msg_Err(filter, "sharpening/blurring not supported by VDPAU device");
return VLC_EGENERIC;
}
/* Initialization */
filter_sys_t *sys = malloc(sizeof (*sys));
if (unlikely(sys == NULL))
return VLC_ENOMEM;
filter->pf_video_filter = Sharpen;
filter->p_sys = sys;
config_ChainParse(filter, "sharpen-", options, filter->p_cfg);
var_AddCallback(filter, "sharpen-sigma", SharpenCallback, sys);
union { uint32_t u; float f; } u;
u.f = vlc_to_vdp_sigma(var_CreateGetFloatCommand(filter, "sharpen-sigma"));
atomic_init(&sys->sigma, u.u);
return VLC_SUCCESS;
}
static void Close(vlc_object_t *obj)
{
filter_t *filter = (filter_t *)obj;
filter_sys_t *sys = filter->p_sys;
var_DelCallback(filter, "sharpen-sigma", SharpenCallback, sys);
free(sys);
}
vlc_module_begin()
set_description(N_("VDPAU sharpen video filter"))
set_category(CAT_VIDEO)
set_subcategory(SUBCAT_VIDEO_VFILTER)
set_capability("video filter2", 0)
add_shortcut("sharpen")
set_callbacks(Open, Close)
vlc_module_end()
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