FFmpeg
vf_super2xsai.c
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1 /*
2  * Copyright (c) 2010 Niel van der Westhuizen <nielkie@gmail.com>
3  * Copyright (c) 2002 A'rpi
4  * Copyright (c) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 /**
24  * @file
25  * Super 2xSaI video filter
26  * Ported from MPlayer libmpcodecs/vf_2xsai.c.
27  */
28 
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/intreadwrite.h"
31 #include "avfilter.h"
32 #include "formats.h"
33 #include "internal.h"
34 #include "video.h"
35 
36 typedef struct Super2xSaIContext {
37  /* masks used for two pixels interpolation */
38  uint32_t hi_pixel_mask;
39  uint32_t lo_pixel_mask;
40 
41  /* masks used for four pixels interpolation */
42  uint32_t q_hi_pixel_mask;
43  uint32_t q_lo_pixel_mask;
44 
45  int bpp; ///< bytes per pixel, pixel stride for each (packed) pixel
46  int is_be;
48 
49 #define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
50 
51 #define INTERPOLATE(A, B) (((A & hi_pixel_mask) >> 1) + ((B & hi_pixel_mask) >> 1) + (A & B & lo_pixel_mask))
52 
53 #define Q_INTERPOLATE(A, B, C, D) ((A & q_hi_pixel_mask) >> 2) + ((B & q_hi_pixel_mask) >> 2) + ((C & q_hi_pixel_mask) >> 2) + ((D & q_hi_pixel_mask) >> 2) \
54  + ((((A & q_lo_pixel_mask) + (B & q_lo_pixel_mask) + (C & q_lo_pixel_mask) + (D & q_lo_pixel_mask)) >> 2) & q_lo_pixel_mask)
55 
57  uint8_t *src, int src_linesize,
58  uint8_t *dst, int dst_linesize,
59  int width, int height)
60 {
61  Super2xSaIContext *s = ctx->priv;
62  unsigned int x, y;
63  uint32_t color[4][4];
64  unsigned char *src_line[4];
65  const int bpp = s->bpp;
66  const uint32_t hi_pixel_mask = s->hi_pixel_mask;
67  const uint32_t lo_pixel_mask = s->lo_pixel_mask;
68  const uint32_t q_hi_pixel_mask = s->q_hi_pixel_mask;
69  const uint32_t q_lo_pixel_mask = s->q_lo_pixel_mask;
70 
71  /* Point to the first 4 lines, first line is duplicated */
72  src_line[0] = src;
73  src_line[1] = src;
74  src_line[2] = src + src_linesize*FFMIN(1, height-1);
75  src_line[3] = src + src_linesize*FFMIN(2, height-1);
76 
77 #define READ_COLOR4(dst, src_line, off) dst = *((const uint32_t *)src_line + off)
78 #define READ_COLOR3(dst, src_line, off) dst = AV_RL24 (src_line + 3*off)
79 #define READ_COLOR2(dst, src_line, off) dst = s->is_be ? AV_RB16(src_line + 2 * off) : AV_RL16(src_line + 2 * off)
80 
81  for (y = 0; y < height; y++) {
82  uint8_t *dst_line[2];
83 
84  dst_line[0] = dst + dst_linesize*2*y;
85  dst_line[1] = dst + dst_linesize*(2*y+1);
86 
87  switch (bpp) {
88  case 4:
89  READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2);
90  READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2);
91  READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2);
92  READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2);
93  break;
94  case 3:
95  READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2);
96  READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2);
97  READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2);
98  READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2);
99  break;
100  default:
101  READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2);
102  READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2);
103  READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2);
104  READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2);
105  }
106 
107  for (x = 0; x < width; x++) {
108  uint32_t product1a, product1b, product2a, product2b;
109 
110 //--------------------------------------- B0 B1 B2 B3 0 1 2 3
111 // 4 5* 6 S2 -> 4 5* 6 7
112 // 1 2 3 S1 8 9 10 11
113 // A0 A1 A2 A3 12 13 14 15
114 //--------------------------------------
115  if (color[2][1] == color[1][2] && color[1][1] != color[2][2]) {
116  product2b = color[2][1];
117  product1b = product2b;
118  } else if (color[1][1] == color[2][2] && color[2][1] != color[1][2]) {
119  product2b = color[1][1];
120  product1b = product2b;
121  } else if (color[1][1] == color[2][2] && color[2][1] == color[1][2]) {
122  int r = 0;
123 
124  r += GET_RESULT(color[1][2], color[1][1], color[1][0], color[3][1]);
125  r += GET_RESULT(color[1][2], color[1][1], color[2][0], color[0][1]);
126  r += GET_RESULT(color[1][2], color[1][1], color[3][2], color[2][3]);
127  r += GET_RESULT(color[1][2], color[1][1], color[0][2], color[1][3]);
128 
129  if (r > 0)
130  product1b = color[1][2];
131  else if (r < 0)
132  product1b = color[1][1];
133  else
134  product1b = INTERPOLATE(color[1][1], color[1][2]);
135 
136  product2b = product1b;
137  } else {
138  if (color[1][2] == color[2][2] && color[2][2] == color[3][1] && color[2][1] != color[3][2] && color[2][2] != color[3][0])
139  product2b = Q_INTERPOLATE(color[2][2], color[2][2], color[2][2], color[2][1]);
140  else if (color[1][1] == color[2][1] && color[2][1] == color[3][2] && color[3][1] != color[2][2] && color[2][1] != color[3][3])
141  product2b = Q_INTERPOLATE(color[2][1], color[2][1], color[2][1], color[2][2]);
142  else
143  product2b = INTERPOLATE(color[2][1], color[2][2]);
144 
145  if (color[1][2] == color[2][2] && color[1][2] == color[0][1] && color[1][1] != color[0][2] && color[1][2] != color[0][0])
146  product1b = Q_INTERPOLATE(color[1][2], color[1][2], color[1][2], color[1][1]);
147  else if (color[1][1] == color[2][1] && color[1][1] == color[0][2] && color[0][1] != color[1][2] && color[1][1] != color[0][3])
148  product1b = Q_INTERPOLATE(color[1][2], color[1][1], color[1][1], color[1][1]);
149  else
150  product1b = INTERPOLATE(color[1][1], color[1][2]);
151  }
152 
153  if (color[1][1] == color[2][2] && color[2][1] != color[1][2] && color[1][0] == color[1][1] && color[1][1] != color[3][2])
154  product2a = INTERPOLATE(color[2][1], color[1][1]);
155  else if (color[1][1] == color[2][0] && color[1][2] == color[1][1] && color[1][0] != color[2][1] && color[1][1] != color[3][0])
156  product2a = INTERPOLATE(color[2][1], color[1][1]);
157  else
158  product2a = color[2][1];
159 
160  if (color[2][1] == color[1][2] && color[1][1] != color[2][2] && color[2][0] == color[2][1] && color[2][1] != color[0][2])
161  product1a = INTERPOLATE(color[2][1], color[1][1]);
162  else if (color[1][0] == color[2][1] && color[2][2] == color[2][1] && color[2][0] != color[1][1] && color[2][1] != color[0][0])
163  product1a = INTERPOLATE(color[2][1], color[1][1]);
164  else
165  product1a = color[1][1];
166 
167  /* Set the calculated pixels */
168  switch (bpp) {
169  case 4:
170  AV_WN32A(dst_line[0] + x * 8, product1a);
171  AV_WN32A(dst_line[0] + x * 8 + 4, product1b);
172  AV_WN32A(dst_line[1] + x * 8, product2a);
173  AV_WN32A(dst_line[1] + x * 8 + 4, product2b);
174  break;
175  case 3:
176  AV_WL24(dst_line[0] + x * 6, product1a);
177  AV_WL24(dst_line[0] + x * 6 + 3, product1b);
178  AV_WL24(dst_line[1] + x * 6, product2a);
179  AV_WL24(dst_line[1] + x * 6 + 3, product2b);
180  break;
181  default: // bpp = 2
182  if (s->is_be) {
183  AV_WB32(dst_line[0] + x * 4, product1a | (product1b << 16));
184  AV_WB32(dst_line[1] + x * 4, product2a | (product2b << 16));
185  } else {
186  AV_WL32(dst_line[0] + x * 4, product1a | (product1b << 16));
187  AV_WL32(dst_line[1] + x * 4, product2a | (product2b << 16));
188  }
189  }
190 
191  /* Move color matrix forward */
192  color[0][0] = color[0][1]; color[0][1] = color[0][2]; color[0][2] = color[0][3];
193  color[1][0] = color[1][1]; color[1][1] = color[1][2]; color[1][2] = color[1][3];
194  color[2][0] = color[2][1]; color[2][1] = color[2][2]; color[2][2] = color[2][3];
195  color[3][0] = color[3][1]; color[3][1] = color[3][2]; color[3][2] = color[3][3];
196 
197  if (x < width - 3) {
198  x += 3;
199  switch (bpp) {
200  case 4:
201  READ_COLOR4(color[0][3], src_line[0], x);
202  READ_COLOR4(color[1][3], src_line[1], x);
203  READ_COLOR4(color[2][3], src_line[2], x);
204  READ_COLOR4(color[3][3], src_line[3], x);
205  break;
206  case 3:
207  READ_COLOR3(color[0][3], src_line[0], x);
208  READ_COLOR3(color[1][3], src_line[1], x);
209  READ_COLOR3(color[2][3], src_line[2], x);
210  READ_COLOR3(color[3][3], src_line[3], x);
211  break;
212  default: /* case 2 */
213  READ_COLOR2(color[0][3], src_line[0], x);
214  READ_COLOR2(color[1][3], src_line[1], x);
215  READ_COLOR2(color[2][3], src_line[2], x);
216  READ_COLOR2(color[3][3], src_line[3], x);
217  }
218  x -= 3;
219  }
220  }
221 
222  /* We're done with one line, so we shift the source lines up */
223  src_line[0] = src_line[1];
224  src_line[1] = src_line[2];
225  src_line[2] = src_line[3];
226 
227  /* Read next line */
228  src_line[3] = src_line[2];
229  if (y < height - 3)
230  src_line[3] += src_linesize;
231  } // y loop
232 }
233 
235 {
236  static const enum AVPixelFormat pix_fmts[] = {
242  };
243 
244  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
245  if (!fmts_list)
246  return AVERROR(ENOMEM);
247  return ff_set_common_formats(ctx, fmts_list);
248 }
249 
251 {
252  Super2xSaIContext *s = inlink->dst->priv;
253 
254  s->hi_pixel_mask = 0xFEFEFEFE;
255  s->lo_pixel_mask = 0x01010101;
256  s->q_hi_pixel_mask = 0xFCFCFCFC;
257  s->q_lo_pixel_mask = 0x03030303;
258  s->bpp = 4;
259 
260  switch (inlink->format) {
261  case AV_PIX_FMT_RGB24:
262  case AV_PIX_FMT_BGR24:
263  s->bpp = 3;
264  break;
265 
266  case AV_PIX_FMT_RGB565BE:
267  case AV_PIX_FMT_BGR565BE:
268  s->is_be = 1;
269  case AV_PIX_FMT_RGB565LE:
270  case AV_PIX_FMT_BGR565LE:
271  s->hi_pixel_mask = 0xF7DEF7DE;
272  s->lo_pixel_mask = 0x08210821;
273  s->q_hi_pixel_mask = 0xE79CE79C;
274  s->q_lo_pixel_mask = 0x18631863;
275  s->bpp = 2;
276  break;
277 
278  case AV_PIX_FMT_BGR555BE:
279  case AV_PIX_FMT_RGB555BE:
280  s->is_be = 1;
281  case AV_PIX_FMT_BGR555LE:
282  case AV_PIX_FMT_RGB555LE:
283  s->hi_pixel_mask = 0x7BDE7BDE;
284  s->lo_pixel_mask = 0x04210421;
285  s->q_hi_pixel_mask = 0x739C739C;
286  s->q_lo_pixel_mask = 0x0C630C63;
287  s->bpp = 2;
288  break;
289  }
290 
291  return 0;
292 }
293 
294 static int config_output(AVFilterLink *outlink)
295 {
296  AVFilterLink *inlink = outlink->src->inputs[0];
297 
298  outlink->w = inlink->w*2;
299  outlink->h = inlink->h*2;
300 
301  av_log(inlink->dst, AV_LOG_VERBOSE, "fmt:%s size:%dx%d -> size:%dx%d\n",
302  av_get_pix_fmt_name(inlink->format),
303  inlink->w, inlink->h, outlink->w, outlink->h);
304 
305  return 0;
306 }
307 
308 static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
309 {
310  AVFilterLink *outlink = inlink->dst->outputs[0];
311  AVFrame *outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
312  if (!outpicref) {
313  av_frame_free(&inpicref);
314  return AVERROR(ENOMEM);
315  }
316  av_frame_copy_props(outpicref, inpicref);
317  outpicref->width = outlink->w;
318  outpicref->height = outlink->h;
319 
320  super2xsai(inlink->dst, inpicref->data[0], inpicref->linesize[0],
321  outpicref->data[0], outpicref->linesize[0],
322  inlink->w, inlink->h);
323 
324  av_frame_free(&inpicref);
325  return ff_filter_frame(outlink, outpicref);
326 }
327 
328 static const AVFilterPad super2xsai_inputs[] = {
329  {
330  .name = "default",
331  .type = AVMEDIA_TYPE_VIDEO,
332  .config_props = config_input,
333  .filter_frame = filter_frame,
334  },
335  { NULL }
336 };
337 
338 static const AVFilterPad super2xsai_outputs[] = {
339  {
340  .name = "default",
341  .type = AVMEDIA_TYPE_VIDEO,
342  .config_props = config_output,
343  },
344  { NULL }
345 };
346 
348  .name = "super2xsai",
349  .description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."),
350  .priv_size = sizeof(Super2xSaIContext),
352  .inputs = super2xsai_inputs,
353  .outputs = super2xsai_outputs,
354 };
#define NULL
Definition: coverity.c:32
int bpp
bytes per pixel, pixel stride for each (packed) pixel
Definition: vf_super2xsai.c:45
uint32_t q_hi_pixel_mask
Definition: vf_super2xsai.c:42
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
#define READ_COLOR3(dst, src_line, off)
#define INTERPOLATE(A, B)
Definition: vf_super2xsai.c:51
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:108
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
Definition: pixfmt.h:111
uint32_t q_lo_pixel_mask
Definition: vf_super2xsai.c:43
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
#define GET_RESULT(A, B, C, D)
Definition: vf_super2xsai.c:49
#define src
Definition: vp8dsp.c:254
#define AV_WN32A(p, v)
Definition: intreadwrite.h:538
static void super2xsai(AVFilterContext *ctx, uint8_t *src, int src_linesize, uint8_t *dst, int dst_linesize, int width, int height)
Definition: vf_super2xsai.c:56
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:106
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define AV_WL24(p, d)
Definition: intreadwrite.h:464
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
uint8_t
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:105
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
#define height
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
static int config_input(AVFilterLink *inlink)
int width
Definition: frame.h:353
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
const char * r
Definition: vf_curves.c:114
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define READ_COLOR4(dst, src_line, off)
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
static const AVFilterPad super2xsai_outputs[]
uint32_t lo_pixel_mask
Definition: vf_super2xsai.c:39
#define FFMIN(a, b)
Definition: common.h:96
#define width
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
Definition: pixfmt.h:110
static int config_output(AVFilterLink *outlink)
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define READ_COLOR2(dst, src_line, off)
static const AVFilterPad super2xsai_inputs[]
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
AVFilter ff_vf_super2xsai
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Filter definition.
Definition: avfilter.h:144
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
uint32_t hi_pixel_mask
Definition: vf_super2xsai.c:38
const char * name
Filter name.
Definition: avfilter.h:148
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:113
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
#define Q_INTERPOLATE(A, B, C, D)
Definition: vf_super2xsai.c:53
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:107
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
static int query_formats(AVFilterContext *ctx)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:112
int height
Definition: frame.h:353
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2438
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
#define AV_WL32(p, v)
Definition: intreadwrite.h:426