1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
|
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#if HAVE_MALLOC_H
#include <malloc.h>
#endif
#include <string.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "vf_scale.h"
#include "libswscale/swscale.h"
#include "libavcodec/avcodec.h"
struct vf_priv_s {
int frameno;
char fname[102];
/// shot stores current screenshot mode:
/// 0: don't take screenshots
/// 1: take single screenshot, reset to 0 afterwards
/// 2: take screenshots of each frame
int shot, store_slices;
int dw, dh, stride;
uint8_t *buffer;
struct SwsContext *ctx;
AVCodecContext *avctx;
uint8_t *outbuffer;
int outbuffer_size;
};
//===========================================================================//
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
vf->priv->ctx=sws_getContextFromCmdLine(width, height, outfmt,
d_width, d_height, IMGFMT_RGB24);
vf->priv->outbuffer_size = d_width * d_height * 3 * 2;
vf->priv->outbuffer = realloc(vf->priv->outbuffer, vf->priv->outbuffer_size);
vf->priv->avctx->width = d_width;
vf->priv->avctx->height = d_height;
vf->priv->avctx->pix_fmt = PIX_FMT_RGB24;
vf->priv->avctx->compression_level = 0;
vf->priv->dw = d_width;
vf->priv->dh = d_height;
vf->priv->stride = (3*vf->priv->dw+15)&~15;
if (vf->priv->buffer) free(vf->priv->buffer); // probably reconfigured
vf->priv->buffer = NULL;
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static void write_png(struct vf_priv_s *priv)
{
char *fname = priv->fname;
FILE * fp;
AVFrame pic;
int size;
fp = fopen (fname, "wb");
if (fp == NULL) {
mp_msg(MSGT_VFILTER,MSGL_ERR,"\nPNG Error opening %s for writing!\n", fname);
return;
}
pic.data[0] = priv->buffer;
pic.linesize[0] = priv->stride;
size = avcodec_encode_video(priv->avctx, priv->outbuffer, priv->outbuffer_size, &pic);
if (size > 0)
fwrite(priv->outbuffer, size, 1, fp);
fclose (fp);
}
static int fexists(char *fname)
{
struct stat dummy;
if (stat(fname, &dummy) == 0) return 1;
else return 0;
}
static void gen_fname(struct vf_priv_s* priv)
{
do {
snprintf (priv->fname, 100, "shot%04d.png", ++priv->frameno);
} while (fexists(priv->fname) && priv->frameno < 100000);
if (fexists(priv->fname)) {
priv->fname[0] = '\0';
return;
}
mp_msg(MSGT_VFILTER,MSGL_INFO,"*** screenshot '%s' ***\n",priv->fname);
}
static void scale_image(struct vf_priv_s* priv, mp_image_t *mpi)
{
uint8_t *dst[3];
int dst_stride[3];
dst_stride[0] = priv->stride;
dst_stride[1] = dst_stride[2] = 0;
if (!priv->buffer)
priv->buffer = memalign(16, dst_stride[0]*priv->dh);
dst[0] = priv->buffer;
dst[1] = dst[2] = 0;
sws_scale_ordered(priv->ctx, mpi->planes, mpi->stride, 0, priv->dh, dst, dst_stride);
}
static void start_slice(struct vf_instance_s* 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->buffer)
vf->priv->buffer = memalign(16, vf->priv->stride*vf->priv->dh);
}
}
static void draw_slice(struct vf_instance_s* vf, unsigned char** src,
int* stride, int w,int h, int x, int y)
{
if (vf->priv->store_slices) {
uint8_t *dst[3];
int dst_stride[3];
dst_stride[0] = vf->priv->stride;
dst_stride[1] = dst_stride[2] = 0;
dst[0] = vf->priv->buffer;
dst[1] = dst[2] = 0;
sws_scale_ordered(vf->priv->ctx, src, stride, y, h, dst, dst_stride);
}
vf_next_draw_slice(vf,src,stride,w,h,x,y);
}
static void get_image(struct vf_instance_s* 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);
mpi->planes[0]=vf->dmpi->planes[0];
mpi->stride[0]=vf->dmpi->stride[0];
if(mpi->flags&MP_IMGFLAG_PLANAR){
mpi->planes[1]=vf->dmpi->planes[1];
mpi->planes[2]=vf->dmpi->planes[2];
mpi->stride[1]=vf->dmpi->stride[1];
mpi->stride[2]=vf->dmpi->stride[2];
}
mpi->width=vf->dmpi->width;
mpi->flags|=MP_IMGFLAG_DIRECT;
mpi->priv=(void*)vf->dmpi;
}
static int put_image(struct vf_instance_s* 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);
dmpi->planes[0]=mpi->planes[0];
dmpi->planes[1]=mpi->planes[1];
dmpi->planes[2]=mpi->planes[2];
dmpi->stride[0]=mpi->stride[0];
dmpi->stride[1]=mpi->stride[1];
dmpi->stride[2]=mpi->stride[2];
dmpi->width=mpi->width;
dmpi->height=mpi->height;
}
if(vf->priv->shot) {
if (vf->priv->shot==1)
vf->priv->shot=0;
gen_fname(vf->priv);
if (vf->priv->fname[0]) {
if (!vf->priv->store_slices)
scale_image(vf->priv, dmpi);
write_png(vf->priv);
}
vf->priv->store_slices = 0;
}
return vf_next_put_image(vf, dmpi, pts);
}
int control (vf_instance_t *vf, int request, void *data)
{
/** data contains an integer argument
* 0: take screenshot with the next frame
* 1: take screenshots with each frame until the same command is given once again
**/
if(request==VFCTRL_SCREENSHOT) {
if (data && *(int*)data) { // repeated screenshot mode
if (vf->priv->shot==2)
vf->priv->shot=0;
else
vf->priv->shot=2;
} else { // single screenshot
if (!vf->priv->shot)
vf->priv->shot=1;
}
return CONTROL_TRUE;
}
return vf_next_control (vf, request, data);
}
//===========================================================================//
static int query_format(struct vf_instance_s* vf, unsigned int fmt)
{
switch(fmt){
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
case IMGFMT_UYVY:
case IMGFMT_YUY2:
case IMGFMT_BGR32:
case IMGFMT_BGR24:
case IMGFMT_BGR16:
case IMGFMT_BGR15:
case IMGFMT_RGB32:
case IMGFMT_RGB24:
case IMGFMT_Y800:
case IMGFMT_Y8:
case IMGFMT_YVU9:
case IMGFMT_IF09:
case IMGFMT_444P:
case IMGFMT_422P:
case IMGFMT_411P:
return vf_next_query_format(vf, fmt);
}
return 0;
}
static void uninit(vf_instance_t *vf)
{
av_freep(&vf->priv->avctx);
if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
if (vf->priv->buffer) free(vf->priv->buffer);
free(vf->priv->outbuffer);
free(vf->priv);
}
// open conflicts with stdio.h at least under MinGW
static int screenshot_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->frameno=0;
vf->priv->shot=0;
vf->priv->store_slices=0;
vf->priv->buffer=0;
vf->priv->outbuffer=0;
vf->priv->ctx=0;
vf->priv->avctx = avcodec_alloc_context();
avcodec_register_all();
if (avcodec_open(vf->priv->avctx, avcodec_find_encoder(CODEC_ID_PNG))) {
mp_msg(MSGT_VFILTER, MSGL_FATAL, "Could not open libavcodec PNG encoder\n");
return 0;
}
return 1;
}
const vf_info_t vf_info_screenshot = {
"screenshot to file",
"screenshot",
"A'rpi, Jindrich Makovicka",
"",
screenshot_open,
NULL
};
//===========================================================================//
|
