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/*
* This file is part of mplayer2.
*
* mplayer2 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.
*
* mplayer2 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 mplayer2; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <libswscale/swscale.h>
#include <libavcodec/avcodec.h>
#include "config.h"
#include "talloc.h"
#include "screenshot.h"
#include "mp_core.h"
#include "mp_msg.h"
#include "path.h"
#include "libmpcodecs/img_format.h"
#include "libmpcodecs/mp_image.h"
#include "libmpcodecs/dec_video.h"
#include "libmpcodecs/vf.h"
#include "libvo/video_out.h"
#include "fmt-conversion.h"
//for sws_getContextFromCmdLine and mp_sws_set_colorspace
#include "libmpcodecs/vf_scale.h"
#include "libvo/csputils.h"
typedef struct screenshot_ctx {
int full_window;
int each_frame;
int using_vf_screenshot;
int frameno;
char fname[102];
} screenshot_ctx;
static screenshot_ctx *screenshot_get_ctx(MPContext *mpctx)
{
if (!mpctx->screenshot_ctx)
mpctx->screenshot_ctx = talloc_zero(mpctx, screenshot_ctx);
return mpctx->screenshot_ctx;
}
static int write_png(screenshot_ctx *ctx, struct mp_image *image)
{
char *fname = ctx->fname;
FILE *fp = NULL;
void *outbuffer = NULL;
int success = 0;
struct AVCodec *png_codec = avcodec_find_encoder(CODEC_ID_PNG);
AVCodecContext *avctx = NULL;
if (!png_codec)
goto print_open_fail;
avctx = avcodec_alloc_context3(png_codec);
if (!avctx)
goto print_open_fail;
avctx->time_base = AV_TIME_BASE_Q;
avctx->width = image->width;
avctx->height = image->height;
avctx->pix_fmt = PIX_FMT_RGB24;
avctx->compression_level = 0;
if (avcodec_open2(avctx, png_codec, NULL) < 0) {
print_open_fail:
mp_msg(MSGT_CPLAYER, MSGL_INFO, "Could not open libavcodec PNG encoder"
" for saving screenshot\n");
goto error_exit;
}
size_t outbuffer_size = image->width * image->height * 3 * 2;
outbuffer = malloc(outbuffer_size);
if (!outbuffer)
goto error_exit;
AVFrame pic;
avcodec_get_frame_defaults(&pic);
for (int n = 0; n < 4; n++) {
pic.data[n] = image->planes[n];
pic.linesize[n] = image->stride[n];
}
int size = avcodec_encode_video(avctx, outbuffer, outbuffer_size, &pic);
if (size < 1)
goto error_exit;
fp = fopen(fname, "wb");
if (fp == NULL) {
mp_msg(MSGT_CPLAYER, MSGL_ERR, "\nPNG Error opening %s for writing!\n",
fname);
goto error_exit;
}
fwrite(outbuffer, size, 1, fp);
fflush(fp);
if (ferror(fp))
goto error_exit;
success = 1;
error_exit:
if (avctx)
avcodec_close(avctx);
av_free(avctx);
if (fp)
fclose(fp);
free(outbuffer);
return success;
}
static int fexists(char *fname)
{
return mp_path_exists(fname);
}
static void gen_fname(screenshot_ctx *ctx)
{
do {
snprintf(ctx->fname, 100, "shot%04d.png", ++ctx->frameno);
} while (fexists(ctx->fname) && ctx->frameno < 100000);
if (fexists(ctx->fname)) {
ctx->fname[0] = '\0';
return;
}
mp_msg(MSGT_CPLAYER, MSGL_INFO, "*** screenshot '%s' ***\n", ctx->fname);
}
void screenshot_save(struct MPContext *mpctx, struct mp_image *image)
{
screenshot_ctx *ctx = screenshot_get_ctx(mpctx);
struct mp_image *dst = alloc_mpi(image->w, image->h, IMGFMT_RGB24);
struct SwsContext *sws = sws_getContextFromCmdLine(image->width,
image->height,
image->imgfmt,
dst->width,
dst->height,
dst->imgfmt);
struct mp_csp_details colorspace;
get_detected_video_colorspace(mpctx->sh_video, &colorspace);
// this is a property of the output device; images always use full-range RGB
colorspace.levels_out = MP_CSP_LEVELS_PC;
mp_sws_set_colorspace(sws, &colorspace);
sws_scale(sws, (const uint8_t **)image->planes, image->stride, 0,
image->height, dst->planes, dst->stride);
gen_fname(ctx);
write_png(ctx, dst);
sws_freeContext(sws);
free_mp_image(dst);
}
static void vf_screenshot_callback(void *pctx, struct mp_image *image)
{
struct MPContext *mpctx = (struct MPContext *)pctx;
screenshot_ctx *ctx = screenshot_get_ctx(mpctx);
screenshot_save(mpctx, image);
if (ctx->each_frame)
screenshot_request(mpctx, 0, ctx->full_window);
}
void screenshot_request(struct MPContext *mpctx, bool each_frame,
bool full_window)
{
if (mpctx->video_out && mpctx->video_out->config_ok) {
screenshot_ctx *ctx = screenshot_get_ctx(mpctx);
ctx->using_vf_screenshot = 0;
if (each_frame) {
ctx->each_frame = !ctx->each_frame;
ctx->full_window = full_window;
if (!ctx->each_frame)
return;
}
struct voctrl_screenshot_args args = { .full_window = full_window };
if (vo_control(mpctx->video_out, VOCTRL_SCREENSHOT, &args) == true) {
screenshot_save(mpctx, args.out_image);
free_mp_image(args.out_image);
} else {
mp_msg(MSGT_CPLAYER, MSGL_INFO, "No VO support for taking"
" screenshots, trying VFCTRL_SCREENSHOT!\n");
ctx->using_vf_screenshot = 1;
struct vf_ctrl_screenshot cmd = {
.image_callback = vf_screenshot_callback,
.image_callback_ctx = mpctx,
};
struct vf_instance *vfilter = mpctx->sh_video->vfilter;
if (vfilter->control(vfilter, VFCTRL_SCREENSHOT, &cmd) !=
CONTROL_OK)
mp_msg(MSGT_CPLAYER, MSGL_INFO,
"...failed (need --vf=screenshot?)\n");
}
}
}
void screenshot_flip(struct MPContext *mpctx)
{
screenshot_ctx *ctx = screenshot_get_ctx(mpctx);
if (!ctx->each_frame)
return;
// screenshot_flip is called when the VO presents a new frame. vf_screenshot
// can behave completely different (consider filters inserted between
// vf_screenshot and vf_vo, that add or remove frames), so handle this case
// somewhere else.
if (ctx->using_vf_screenshot)
return;
screenshot_request(mpctx, 0, ctx->full_window);
}
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