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mpv/libmpcodecs/vf_screenshot.c
wm4 8b69d8a366 screenshot: allow forcing taking screenshots with the video filter
If the screenshot_force video filter is inserted, taking screenshots will
always use the video filter, and skip the VO specific screenshot code.

This can be useful if the VO code causes problems, or if it's intended to
take screenshots from a specific location in the filter chain.

The 'screenshot' filter is intended as fallback, it's not used if possible.
2012-02-29 03:41:14 +01:00

221 lines
6.6 KiB
C

/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "vf_scale.h"
#include "fmt-conversion.h"
#include "libvo/fastmemcpy.h"
#include <libswscale/swscale.h>
struct vf_priv_s {
mp_image_t *image;
void (*image_callback)(void *, mp_image_t *);
void *image_callback_ctx;
int shot, store_slices;
};
//===========================================================================//
static int config(struct vf_instance *vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
free_mp_image(vf->priv->image);
vf->priv->image = new_mp_image(width, height);
mp_image_setfmt(vf->priv->image, outfmt);
vf->priv->image->w = d_width;
vf->priv->image->h = d_height;
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static void start_slice(struct vf_instance *vf, mp_image_t *mpi)
{
vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
mpi->type, mpi->flags, mpi->width, mpi->height);
if (vf->priv->shot) {
vf->priv->store_slices = 1;
if (!(vf->priv->image->flags & MP_IMGFLAG_ALLOCATED))
mp_image_alloc_planes(vf->priv->image);
}
}
static void memcpy_pic_slice(unsigned char *dst, unsigned char *src,
int bytesPerLine, int y, int h,
int dstStride, int srcStride)
{
memcpy_pic(dst + h * dstStride, src + h * srcStride, bytesPerLine,
h, dstStride, srcStride);
}
static void draw_slice(struct vf_instance *vf, unsigned char** src,
int* stride, int w,int h, int x, int y)
{
if (vf->priv->store_slices) {
mp_image_t *dst = vf->priv->image;
int bp = (dst->bpp + 7) / 8;
if (dst->flags & MP_IMGFLAG_PLANAR) {
int bytes_per_line[3] = { w * bp, dst->chroma_width, dst->chroma_width };
for (int n = 0; n < 3; n++) {
memcpy_pic_slice(dst->planes[n], src[n], bytes_per_line[n],
y, h, dst->stride[n], stride[n]);
}
} else {
memcpy_pic_slice(dst->planes[0], src[0], dst->w*bp, y, dst->h,
dst->stride[0], stride[0]);
}
}
vf_next_draw_slice(vf,src,stride,w,h,x,y);
}
static void get_image(struct vf_instance *vf, mp_image_t *mpi)
{
// FIXME: should vf.c really call get_image when using slices??
if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK)
return;
vf->dmpi= vf_get_image(vf->next, mpi->imgfmt,
mpi->type, mpi->flags/* | MP_IMGFLAG_READABLE*/, mpi->width, mpi->height);
for (int i = 0; i < MP_MAX_PLANES; i++) {
mpi->planes[i]=vf->dmpi->planes[i];
mpi->stride[i]=vf->dmpi->stride[i];
}
mpi->width=vf->dmpi->width;
mpi->flags|=MP_IMGFLAG_DIRECT;
mpi->priv=(void*)vf->dmpi;
}
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
{
mp_image_t *dmpi = (mp_image_t *)mpi->priv;
if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK)
dmpi = vf->dmpi;
else
if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
dmpi=vf_get_image(vf->next,mpi->imgfmt,
MP_IMGTYPE_EXPORT, 0,
mpi->width, mpi->height);
vf_clone_mpi_attributes(dmpi, mpi);
for (int i = 0; i < MP_MAX_PLANES; i++) {
dmpi->planes[i]=mpi->planes[i];
dmpi->stride[i]=mpi->stride[i];
}
dmpi->width=mpi->width;
dmpi->height=mpi->height;
}
if(vf->priv->shot) {
vf->priv->shot=0;
mp_image_t image;
if (!vf->priv->store_slices)
image = *dmpi;
else
image = *vf->priv->image;
image.w = vf->priv->image->w;
image.h = vf->priv->image->h;
vf->priv->image_callback(vf->priv->image_callback_ctx, &image);
vf->priv->store_slices = 0;
}
return vf_next_put_image(vf, dmpi, pts);
}
static int control (vf_instance_t *vf, int request, void *data)
{
if(request==VFCTRL_SCREENSHOT) {
struct vf_ctrl_screenshot *cmd = (struct vf_ctrl_screenshot *)data;
vf->priv->image_callback = cmd->image_callback;
vf->priv->image_callback_ctx = cmd->image_callback_ctx;
vf->priv->shot=1;
return CONTROL_TRUE;
}
return vf_next_control (vf, request, data);
}
//===========================================================================//
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
enum PixelFormat av_format = imgfmt2pixfmt(fmt);
if (av_format != PIX_FMT_NONE && sws_isSupportedInput(av_format))
return vf_next_query_format(vf, fmt);
return 0;
}
static void uninit(vf_instance_t *vf)
{
free_mp_image(vf->priv->image);
free(vf->priv);
}
static int vf_open(vf_instance_t *vf, char *args)
{
vf->config=config;
vf->control=control;
vf->put_image=put_image;
vf->query_format=query_format;
vf->start_slice=start_slice;
vf->draw_slice=draw_slice;
vf->get_image=get_image;
vf->uninit=uninit;
vf->priv=malloc(sizeof(struct vf_priv_s));
vf->priv->shot=0;
vf->priv->store_slices=0;
vf->priv->image=NULL;
return 1;
}
const vf_info_t vf_info_screenshot = {
"screenshot to file",
"screenshot",
"A'rpi, Jindrich Makovicka",
"",
vf_open,
NULL
};
// screenshot.c will look for a filter named "screenshot_force", and not use
// the VO based screenshot code if it's in the filter chain.
const vf_info_t vf_info_screenshot_force = {
"screenshot to file (override VO based screenshot code)",
"screenshot_force",
"A'rpi, Jindrich Makovicka",
"",
vf_open,
NULL
};
//===========================================================================//