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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../config.h"
#include "../mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "../libvo/video_out.h"
#include "../libvo/fastmemcpy.h"
#include "../postproc/rgb2rgb.h"
struct vf_priv_s {
unsigned char *buf;
int brightness;
int contrast;
};
static void process(unsigned char *dest, int dstride, unsigned char *src, int sstride,
int w, int h, int brightness, int contrast)
{
int i;
int pel;
int dstep = dstride-w;
int sstep = sstride-w;
brightness = ((brightness+100)*511)/200-128;
contrast = ((contrast+100)*512)/200;
while (h--) {
for (i = w; i; i--)
{
/* slow */
pel = ((*src++ - 128) * contrast)/256 + brightness;
*dest++ = pel > 255 ? 255 : (pel < 0 ? 0 : pel);
}
src += sstep;
dest += dstep;
}
}
/* FIXME: add packed yuv version of process, and optimized code! */
static void put_image(struct vf_instance_s* vf, mp_image_t *mpi)
{
mp_image_t *dmpi;
dmpi=vf_get_image(vf->next, mpi->imgfmt,
MP_IMGTYPE_EXPORT, 0,
mpi->w, mpi->h);
dmpi->stride[0] = mpi->stride[0];
dmpi->planes[1] = mpi->planes[1];
dmpi->planes[2] = mpi->planes[2];
dmpi->stride[1] = mpi->stride[1];
dmpi->stride[2] = mpi->stride[2];
if (!vf->priv->buf) vf->priv->buf = malloc(mpi->stride[0]*mpi->h);
if ((vf->priv->brightness == 0) && (vf->priv->contrast == 0))
dmpi->planes[0] = mpi->planes[0];
else {
dmpi->planes[0] = vf->priv->buf;
process(dmpi->planes[0], dmpi->stride[0],
mpi->planes[0], mpi->stride[0],
mpi->w, mpi->h, vf->priv->brightness,
vf->priv->contrast);
}
vf_next_put_image(vf,dmpi);
}
static int control(struct vf_instance_s* vf, int request, void* data)
{
vf_equalizer_t *eq;
switch (request) {
case VFCTRL_SET_EQUALIZER:
eq = data;
if (!strcmp(eq->item,"brightness")) {
vf->priv->brightness = eq->value;
return CONTROL_TRUE;
}
else if (!strcmp(eq->item,"contrast")) {
vf->priv->contrast = eq->value;
return CONTROL_TRUE;
}
break;
case VFCTRL_GET_EQUALIZER:
eq = data;
if (!strcmp(eq->item,"brightness")) {
eq->value = vf->priv->brightness;
return CONTROL_TRUE;
}
else if (!strcmp(eq->item,"contrast")) {
eq->value = vf->priv->contrast;
return CONTROL_TRUE;
}
break;
}
return vf_next_control(vf, request, data);
}
static int query_format(struct vf_instance_s* vf, unsigned int fmt)
{
switch (fmt) {
case IMGFMT_YVU9:
case IMGFMT_IF09:
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
case IMGFMT_CLPL:
case IMGFMT_Y800:
case IMGFMT_Y8:
case IMGFMT_NV12:
case IMGFMT_444P:
case IMGFMT_422P:
case IMGFMT_411P:
return vf_next_query_format(vf, fmt);
}
return 0;
}
static void uninit(struct vf_instance_s* vf)
{
if (vf->priv->buf) free(vf->priv->buf);
free(vf->priv);
}
static int open(vf_instance_t *vf, char* args)
{
vf->control=control;
vf->query_format=query_format;
vf->put_image=put_image;
vf->uninit=uninit;
vf->priv = malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if (args) sscanf(args, "%d:%d", &vf->priv->brightness, &vf->priv->contrast);
return 1;
}
vf_info_t vf_info_eq = {
"soft video equalizer",
"eq",
"Richard Felker",
"",
open
};
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