FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vf_pad.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2008 vmrsss
3  * Copyright (c) 2009 Stefano Sabatini
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * video padding filter
25  */
26 
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "video.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/common.h"
33 #include "libavutil/eval.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/colorspace.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/opt.h"
40 
41 #include "drawutils.h"
42 
43 static const char *const var_names[] = {
44  "in_w", "iw",
45  "in_h", "ih",
46  "out_w", "ow",
47  "out_h", "oh",
48  "x",
49  "y",
50  "a",
51  "sar",
52  "dar",
53  "hsub",
54  "vsub",
55  NULL
56 };
57 
58 enum var_name {
71 };
72 
74 {
76 }
77 
78 typedef struct PadContext {
79  const AVClass *class;
80  int w, h; ///< output dimensions, a value of 0 will result in the input size
81  int x, y; ///< offsets of the input area with respect to the padded area
82  int in_w, in_h; ///< width and height for the padded input video, which has to be aligned to the chroma values in order to avoid chroma issues
83 
84  char *w_expr; ///< width expression string
85  char *h_expr; ///< height expression string
86  char *x_expr; ///< width expression string
87  char *y_expr; ///< height expression string
88  uint8_t rgba_color[4]; ///< color for the padding area
91 } PadContext;
92 
93 static int config_input(AVFilterLink *inlink)
94 {
95  AVFilterContext *ctx = inlink->dst;
96  PadContext *s = ctx->priv;
97  int ret;
98  double var_values[VARS_NB], res;
99  char *expr;
100 
101  ff_draw_init(&s->draw, inlink->format, 0);
102  ff_draw_color(&s->draw, &s->color, s->rgba_color);
103 
104  var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
105  var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
106  var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
107  var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
108  var_values[VAR_A] = (double) inlink->w / inlink->h;
109  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
110  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
111  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
112  var_values[VAR_HSUB] = 1 << s->draw.hsub_max;
113  var_values[VAR_VSUB] = 1 << s->draw.vsub_max;
114 
115  /* evaluate width and height */
116  av_expr_parse_and_eval(&res, (expr = s->w_expr),
117  var_names, var_values,
118  NULL, NULL, NULL, NULL, NULL, 0, ctx);
119  s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
120  if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
121  var_names, var_values,
122  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
123  goto eval_fail;
124  s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
125  if (!s->h)
126  var_values[VAR_OUT_H] = var_values[VAR_OH] = s->h = inlink->h;
127 
128  /* evaluate the width again, as it may depend on the evaluated output height */
129  if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
130  var_names, var_values,
131  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
132  goto eval_fail;
133  s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
134  if (!s->w)
135  var_values[VAR_OUT_W] = var_values[VAR_OW] = s->w = inlink->w;
136 
137  /* evaluate x and y */
138  av_expr_parse_and_eval(&res, (expr = s->x_expr),
139  var_names, var_values,
140  NULL, NULL, NULL, NULL, NULL, 0, ctx);
141  s->x = var_values[VAR_X] = res;
142  if ((ret = av_expr_parse_and_eval(&res, (expr = s->y_expr),
143  var_names, var_values,
144  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
145  goto eval_fail;
146  s->y = var_values[VAR_Y] = res;
147  /* evaluate x again, as it may depend on the evaluated y value */
148  if ((ret = av_expr_parse_and_eval(&res, (expr = s->x_expr),
149  var_names, var_values,
150  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
151  goto eval_fail;
152  s->x = var_values[VAR_X] = res;
153 
154  /* sanity check params */
155  if (s->w < 0 || s->h < 0 || s->x < 0 || s->y < 0) {
156  av_log(ctx, AV_LOG_ERROR, "Negative values are not acceptable.\n");
157  return AVERROR(EINVAL);
158  }
159 
160  s->w = ff_draw_round_to_sub(&s->draw, 0, -1, s->w);
161  s->h = ff_draw_round_to_sub(&s->draw, 1, -1, s->h);
162  s->x = ff_draw_round_to_sub(&s->draw, 0, -1, s->x);
163  s->y = ff_draw_round_to_sub(&s->draw, 1, -1, s->y);
164  s->in_w = ff_draw_round_to_sub(&s->draw, 0, -1, inlink->w);
165  s->in_h = ff_draw_round_to_sub(&s->draw, 1, -1, inlink->h);
166 
167  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X\n",
168  inlink->w, inlink->h, s->w, s->h, s->x, s->y,
169  s->rgba_color[0], s->rgba_color[1], s->rgba_color[2], s->rgba_color[3]);
170 
171  if (s->x < 0 || s->y < 0 ||
172  s->w <= 0 || s->h <= 0 ||
173  (unsigned)s->x + (unsigned)inlink->w > s->w ||
174  (unsigned)s->y + (unsigned)inlink->h > s->h) {
175  av_log(ctx, AV_LOG_ERROR,
176  "Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n",
177  s->x, s->y, s->x + inlink->w, s->y + inlink->h, s->w, s->h);
178  return AVERROR(EINVAL);
179  }
180 
181  return 0;
182 
183 eval_fail:
185  "Error when evaluating the expression '%s'\n", expr);
186  return ret;
187 
188 }
189 
190 static int config_output(AVFilterLink *outlink)
191 {
192  PadContext *s = outlink->src->priv;
193 
194  outlink->w = s->w;
195  outlink->h = s->h;
196  return 0;
197 }
198 
199 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
200 {
201  PadContext *s = inlink->dst->priv;
202 
204  w + (s->w - s->in_w),
205  h + (s->h - s->in_h) + (s->x > 0));
206  int plane;
207 
208  if (!frame)
209  return NULL;
210 
211  frame->width = w;
212  frame->height = h;
213 
214  for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++) {
215  int hsub = s->draw.hsub[plane];
216  int vsub = s->draw.vsub[plane];
217  frame->data[plane] += (s->x >> hsub) * s->draw.pixelstep[plane] +
218  (s->y >> vsub) * frame->linesize[plane];
219  }
220 
221  return frame;
222 }
223 
224 /* check whether each plane in this buffer can be padded without copying */
226 {
227  int planes[4] = { -1, -1, -1, -1}, *p = planes;
228  int i, j;
229 
230  /* get all planes in this buffer */
231  for (i = 0; i < FF_ARRAY_ELEMS(planes) && frame->data[i]; i++) {
232  if (av_frame_get_plane_buffer(frame, i) == buf)
233  *p++ = i;
234  }
235 
236  /* for each plane in this buffer, check that it can be padded without
237  * going over buffer bounds or other planes */
238  for (i = 0; i < FF_ARRAY_ELEMS(planes) && planes[i] >= 0; i++) {
239  int hsub = s->draw.hsub[planes[i]];
240  int vsub = s->draw.vsub[planes[i]];
241 
242  uint8_t *start = frame->data[planes[i]];
243  uint8_t *end = start + (frame->height >> vsub) *
244  frame->linesize[planes[i]];
245 
246  /* amount of free space needed before the start and after the end
247  * of the plane */
248  ptrdiff_t req_start = (s->x >> hsub) * s->draw.pixelstep[planes[i]] +
249  (s->y >> vsub) * frame->linesize[planes[i]];
250  ptrdiff_t req_end = ((s->w - s->x - frame->width) >> hsub) *
251  s->draw.pixelstep[planes[i]] +
252  ((s->h - s->y - frame->height) >> vsub) * frame->linesize[planes[i]];
253 
254  if (frame->linesize[planes[i]] < (s->w >> hsub) * s->draw.pixelstep[planes[i]])
255  return 1;
256  if (start - buf->data < req_start ||
257  (buf->data + buf->size) - end < req_end)
258  return 1;
259 
260  for (j = 0; j < FF_ARRAY_ELEMS(planes) && planes[j] >= 0; j++) {
261  int vsub1 = s->draw.vsub[planes[j]];
262  uint8_t *start1 = frame->data[planes[j]];
263  uint8_t *end1 = start1 + (frame->height >> vsub1) *
264  frame->linesize[planes[j]];
265  if (i == j)
266  continue;
267 
268  if (FFSIGN(start - end1) != FFSIGN(start - end1 - req_start) ||
269  FFSIGN(end - start1) != FFSIGN(end - start1 + req_end))
270  return 1;
271  }
272  }
273 
274  return 0;
275 }
276 
278 {
279  int i;
280 
281  if (!av_frame_is_writable(frame))
282  return 1;
283 
284  for (i = 0; i < 4 && frame->buf[i]; i++)
285  if (buffer_needs_copy(s, frame, frame->buf[i]))
286  return 1;
287  return 0;
288 }
289 
290 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
291 {
292  PadContext *s = inlink->dst->priv;
293  AVFrame *out;
294  int needs_copy = frame_needs_copy(s, in);
295 
296  if (needs_copy) {
297  av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
298  out = ff_get_video_buffer(inlink->dst->outputs[0],
299  FFMAX(inlink->w, s->w),
300  FFMAX(inlink->h, s->h));
301  if (!out) {
302  av_frame_free(&in);
303  return AVERROR(ENOMEM);
304  }
305 
306  av_frame_copy_props(out, in);
307  } else {
308  int i;
309 
310  out = in;
311  for (i = 0; i < 4 && out->data[i] && out->linesize[i]; i++) {
312  int hsub = s->draw.hsub[i];
313  int vsub = s->draw.vsub[i];
314  out->data[i] -= (s->x >> hsub) * s->draw.pixelstep[i] +
315  (s->y >> vsub) * out->linesize[i];
316  }
317  }
318 
319  /* top bar */
320  if (s->y) {
321  ff_fill_rectangle(&s->draw, &s->color,
322  out->data, out->linesize,
323  0, 0, s->w, s->y);
324  }
325 
326  /* bottom bar */
327  if (s->h > s->y + s->in_h) {
328  ff_fill_rectangle(&s->draw, &s->color,
329  out->data, out->linesize,
330  0, s->y + s->in_h, s->w, s->h - s->y - s->in_h);
331  }
332 
333  /* left border */
334  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
335  0, s->y, s->x, in->height);
336 
337  if (needs_copy) {
339  out->data, out->linesize, in->data, in->linesize,
340  s->x, s->y, 0, 0, in->width, in->height);
341  }
342 
343  /* right border */
344  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
345  s->x + s->in_w, s->y, s->w - s->x - s->in_w,
346  in->height);
347 
348  out->width = s->w;
349  out->height = s->h;
350 
351  if (in != out)
352  av_frame_free(&in);
353  return ff_filter_frame(inlink->dst->outputs[0], out);
354 }
355 
356 #define OFFSET(x) offsetof(PadContext, x)
357 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
358 
359 static const AVOption pad_options[] = {
360  { "width", "set the pad area width expression", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
361  { "w", "set the pad area width expression", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
362  { "height", "set the pad area height expression", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
363  { "h", "set the pad area height expression", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
364  { "x", "set the x offset expression for the input image position", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
365  { "y", "set the y offset expression for the input image position", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
366  { "color", "set the color of the padded area border", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
367  { NULL }
368 };
369 
371 
373  {
374  .name = "default",
375  .type = AVMEDIA_TYPE_VIDEO,
376  .config_props = config_input,
377  .get_video_buffer = get_video_buffer,
378  .filter_frame = filter_frame,
379  },
380  { NULL }
381 };
382 
384  {
385  .name = "default",
386  .type = AVMEDIA_TYPE_VIDEO,
387  .config_props = config_output,
388  },
389  { NULL }
390 };
391 
393  .name = "pad",
394  .description = NULL_IF_CONFIG_SMALL("Pad the input video."),
395  .priv_size = sizeof(PadContext),
396  .priv_class = &pad_class,
398  .inputs = avfilter_vf_pad_inputs,
399  .outputs = avfilter_vf_pad_outputs,
400 };
int plane
Definition: avisynth_c.h:422
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:721
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
Definition: vf_pad.c:199
#define FLAGS
Definition: vf_pad.c:357
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
void ff_copy_rectangle2(FFDrawContext *draw, uint8_t *dst[], int dst_linesize[], uint8_t *src[], int src_linesize[], int dst_x, int dst_y, int src_x, int src_y, int w, int h)
Copy a rectangle from an image to another.
Definition: drawutils.c:286
AVOption.
Definition: opt.h:245
misc image utilities
uint8_t hsub[MAX_PLANES]
Definition: drawutils.h:54
Main libavfilter public API header.
FFDrawColor color
Definition: vf_pad.c:90
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:363
int in_h
width and height for the padded input video, which has to be aligned to the chroma values in order to...
Definition: vf_pad.c:82
int x
Definition: vf_pad.c:81
int num
Numerator.
Definition: rational.h:59
Various defines for YUV<->RGB conversion.
char * x_expr
width expression string
Definition: vf_pad.c:86
static const AVFilterPad avfilter_vf_pad_outputs[]
Definition: vf_pad.c:383
static int config_output(AVFilterLink *outlink)
Definition: vf_pad.c:190
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
Definition: vf_pad.c:63
int w
Definition: vf_pad.c:80
int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, int value)
Round a dimension according to subsampling.
Definition: drawutils.c:709
const char * name
Pad name.
Definition: internal.h:59
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1189
AVFILTER_DEFINE_CLASS(pad)
uint8_t
Definition: vf_pad.c:66
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
Definition: vf_pad.c:65
static const char *const var_names[]
Definition: vf_pad.c:43
Definition: vf_pad.c:60
static AVFrame * frame
#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:53
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
Definition: eval.c:723
int width
width and height of the video frame
Definition: frame.h:236
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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
Definition: vf_pad.c:67
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void * priv
private data for use by the filter
Definition: avfilter.h:322
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static int config_input(AVFilterLink *inlink)
Definition: vf_pad.c:93
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:224
uint8_t vsub_max
Definition: drawutils.h:57
static const AVOption pad_options[]
Definition: vf_pad.c:359
#define FFMAX(a, b)
Definition: common.h:94
var_name
Definition: aeval.c:46
static int frame_needs_copy(PadContext *s, AVFrame *frame)
Definition: vf_pad.c:277
#define FFSIGN(a)
Definition: common.h:73
static int buffer_needs_copy(PadContext *s, AVFrame *frame, AVBufferRef *buf)
Definition: vf_pad.c:225
AVFormatContext * ctx
Definition: movenc.c:48
AVBufferRef * av_frame_get_plane_buffer(AVFrame *frame, int plane)
Get the buffer reference a given data plane is stored in.
Definition: frame.c:586
Definition: vf_pad.c:59
char * w_expr
width expression string
Definition: vf_pad.c:84
int y
offsets of the input area with respect to the padded area
Definition: vf_pad.c:81
int in_w
Definition: vf_pad.c:82
Definition: vf_pad.c:61
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
#define OFFSET(x)
Definition: vf_pad.c:356
#define FF_ARRAY_ELEMS(a)
uint8_t rgba_color[4]
color for the padding area
Definition: vf_pad.c:88
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
misc drawing utilities
Definition: vf_pad.c:70
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:521
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
static const AVFilterPad avfilter_vf_pad_inputs[]
Definition: vf_pad.c:372
uint8_t * data
The data buffer.
Definition: buffer.h:89
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
void * buf
Definition: avisynth_c.h:690
uint8_t hsub_max
Definition: drawutils.h:56
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
Definition: vf_pad.c:64
const char * name
Filter name.
Definition: avfilter.h:148
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:176
Definition: vf_pad.c:62
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:319
int size
Size of data in bytes.
Definition: buffer.h:93
static int query_formats(AVFilterContext *ctx)
Definition: vf_pad.c:73
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
A reference to a data buffer.
Definition: buffer.h:81
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:282
int den
Denominator.
Definition: rational.h:60
FFDrawContext draw
Definition: vf_pad.c:89
char * y_expr
height expression string
Definition: vf_pad.c:87
#define NAN
Definition: math.h:28
int pixelstep[MAX_PLANES]
Definition: drawutils.h:52
AVFilter ff_vf_pad
Definition: vf_pad.c:392
int h
output dimensions, a value of 0 will result in the input size
Definition: vf_pad.c:80
char * h_expr
height expression string
Definition: vf_pad.c:85
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:308
An instance of a filter.
Definition: avfilter.h:307
int height
Definition: frame.h:236
FILE * out
Definition: movenc.c:54
uint8_t vsub[MAX_PLANES]
Definition: drawutils.h:55
void INT64 start
Definition: avisynth_c.h:690
internal API functions
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_pad.c:290
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:581
simple arithmetic expression evaluator