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vf_pad.c
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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/avassert.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/parseutils.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/opt.h"
41 
42 #include "drawutils.h"
43 
44 static const char *const var_names[] = {
45  "in_w", "iw",
46  "in_h", "ih",
47  "out_w", "ow",
48  "out_h", "oh",
49  "x",
50  "y",
51  "a",
52  "sar",
53  "dar",
54  "hsub",
55  "vsub",
56  NULL
57 };
58 
59 enum var_name {
72 };
73 
75 {
77 }
78 
79 typedef struct PadContext {
80  const AVClass *class;
81  int w, h; ///< output dimensions, a value of 0 will result in the input size
82  int x, y; ///< offsets of the input area with respect to the padded area
83  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
84 
85  char *w_expr; ///< width expression string
86  char *h_expr; ///< height expression string
87  char *x_expr; ///< width expression string
88  char *y_expr; ///< height expression string
89  uint8_t rgba_color[4]; ///< color for the padding area
92 } PadContext;
93 
94 static int config_input(AVFilterLink *inlink)
95 {
96  AVFilterContext *ctx = inlink->dst;
97  PadContext *s = ctx->priv;
98  int ret;
99  double var_values[VARS_NB], res;
100  char *expr;
101 
102  ff_draw_init(&s->draw, inlink->format, 0);
103  ff_draw_color(&s->draw, &s->color, s->rgba_color);
104 
105  var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
106  var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
107  var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
108  var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
109  var_values[VAR_A] = (double) inlink->w / inlink->h;
110  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
111  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
112  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
113  var_values[VAR_HSUB] = 1 << s->draw.hsub_max;
114  var_values[VAR_VSUB] = 1 << s->draw.vsub_max;
115 
116  /* evaluate width and height */
117  av_expr_parse_and_eval(&res, (expr = s->w_expr),
118  var_names, var_values,
119  NULL, NULL, NULL, NULL, NULL, 0, ctx);
120  s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
121  if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
122  var_names, var_values,
123  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
124  goto eval_fail;
125  s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
126  /* evaluate the width again, as it may depend on the evaluated output height */
127  if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
128  var_names, var_values,
129  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
130  goto eval_fail;
131  s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
132 
133  /* evaluate x and y */
134  av_expr_parse_and_eval(&res, (expr = s->x_expr),
135  var_names, var_values,
136  NULL, NULL, NULL, NULL, NULL, 0, ctx);
137  s->x = var_values[VAR_X] = res;
138  if ((ret = av_expr_parse_and_eval(&res, (expr = s->y_expr),
139  var_names, var_values,
140  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
141  goto eval_fail;
142  s->y = var_values[VAR_Y] = res;
143  /* evaluate x again, as it may depend on the evaluated y value */
144  if ((ret = av_expr_parse_and_eval(&res, (expr = s->x_expr),
145  var_names, var_values,
146  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
147  goto eval_fail;
148  s->x = var_values[VAR_X] = res;
149 
150  /* sanity check params */
151  if (s->w < 0 || s->h < 0 || s->x < 0 || s->y < 0) {
152  av_log(ctx, AV_LOG_ERROR, "Negative values are not acceptable.\n");
153  return AVERROR(EINVAL);
154  }
155 
156  if (!s->w)
157  s->w = inlink->w;
158  if (!s->h)
159  s->h = inlink->h;
160 
161  s->w = ff_draw_round_to_sub(&s->draw, 0, -1, s->w);
162  s->h = ff_draw_round_to_sub(&s->draw, 1, -1, s->h);
163  s->x = ff_draw_round_to_sub(&s->draw, 0, -1, s->x);
164  s->y = ff_draw_round_to_sub(&s->draw, 1, -1, s->y);
165  s->in_w = ff_draw_round_to_sub(&s->draw, 0, -1, inlink->w);
166  s->in_h = ff_draw_round_to_sub(&s->draw, 1, -1, inlink->h);
167 
168  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",
169  inlink->w, inlink->h, s->w, s->h, s->x, s->y,
170  s->rgba_color[0], s->rgba_color[1], s->rgba_color[2], s->rgba_color[3]);
171 
172  if (s->x < 0 || s->y < 0 ||
173  s->w <= 0 || s->h <= 0 ||
174  (unsigned)s->x + (unsigned)inlink->w > s->w ||
175  (unsigned)s->y + (unsigned)inlink->h > s->h) {
176  av_log(ctx, AV_LOG_ERROR,
177  "Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n",
178  s->x, s->y, s->x + inlink->w, s->y + inlink->h, s->w, s->h);
179  return AVERROR(EINVAL);
180  }
181 
182  return 0;
183 
184 eval_fail:
186  "Error when evaluating the expression '%s'\n", expr);
187  return ret;
188 
189 }
190 
191 static int config_output(AVFilterLink *outlink)
192 {
193  PadContext *s = outlink->src->priv;
194 
195  outlink->w = s->w;
196  outlink->h = s->h;
197  return 0;
198 }
199 
200 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
201 {
202  PadContext *s = inlink->dst->priv;
203 
205  w + (s->w - s->in_w),
206  h + (s->h - s->in_h));
207  int plane;
208 
209  if (!frame)
210  return NULL;
211 
212  frame->width = w;
213  frame->height = h;
214 
215  for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++) {
216  int hsub = s->draw.hsub[plane];
217  int vsub = s->draw.vsub[plane];
218  frame->data[plane] += (s->x >> hsub) * s->draw.pixelstep[plane] +
219  (s->y >> vsub) * frame->linesize[plane];
220  }
221 
222  return frame;
223 }
224 
225 /* check whether each plane in this buffer can be padded without copying */
227 {
228  int planes[4] = { -1, -1, -1, -1}, *p = planes;
229  int i, j;
230 
231  /* get all planes in this buffer */
232  for (i = 0; i < FF_ARRAY_ELEMS(planes) && frame->data[i]; i++) {
233  if (av_frame_get_plane_buffer(frame, i) == buf)
234  *p++ = i;
235  }
236 
237  /* for each plane in this buffer, check that it can be padded without
238  * going over buffer bounds or other planes */
239  for (i = 0; i < FF_ARRAY_ELEMS(planes) && planes[i] >= 0; i++) {
240  int hsub = s->draw.hsub[planes[i]];
241  int vsub = s->draw.vsub[planes[i]];
242 
243  uint8_t *start = frame->data[planes[i]];
244  uint8_t *end = start + (frame->height >> vsub) *
245  frame->linesize[planes[i]];
246 
247  /* amount of free space needed before the start and after the end
248  * of the plane */
249  ptrdiff_t req_start = (s->x >> hsub) * s->draw.pixelstep[planes[i]] +
250  (s->y >> vsub) * frame->linesize[planes[i]];
251  ptrdiff_t req_end = ((s->w - s->x - frame->width) >> hsub) *
252  s->draw.pixelstep[planes[i]] +
253  ((s->h - s->y - frame->height) >> vsub) * frame->linesize[planes[i]];
254 
255  if (frame->linesize[planes[i]] < (s->w >> hsub) * s->draw.pixelstep[planes[i]])
256  return 1;
257  if (start - buf->data < req_start ||
258  (buf->data + buf->size) - end < req_end)
259  return 1;
260 
261  for (j = 0; j < FF_ARRAY_ELEMS(planes) && planes[j] >= 0; j++) {
262  int vsub1 = s->draw.vsub[planes[j]];
263  uint8_t *start1 = frame->data[planes[j]];
264  uint8_t *end1 = start1 + (frame->height >> vsub1) *
265  frame->linesize[planes[j]];
266  if (i == j)
267  continue;
268 
269  if (FFSIGN(start - end1) != FFSIGN(start - end1 - req_start) ||
270  FFSIGN(end - start1) != FFSIGN(end - start1 + req_end))
271  return 1;
272  }
273  }
274 
275  return 0;
276 }
277 
279 {
280  int i;
281 
282  if (!av_frame_is_writable(frame))
283  return 1;
284 
285  for (i = 0; i < 4 && frame->buf[i]; i++)
286  if (buffer_needs_copy(s, frame, frame->buf[i]))
287  return 1;
288  return 0;
289 }
290 
291 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
292 {
293  PadContext *s = inlink->dst->priv;
294  AVFrame *out;
295  int needs_copy = frame_needs_copy(s, in);
296 
297  if (needs_copy) {
298  av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
299  out = ff_get_video_buffer(inlink->dst->outputs[0],
300  FFMAX(inlink->w, s->w),
301  FFMAX(inlink->h, s->h));
302  if (!out) {
303  av_frame_free(&in);
304  return AVERROR(ENOMEM);
305  }
306 
307  av_frame_copy_props(out, in);
308  } else {
309  int i;
310 
311  out = in;
312  for (i = 0; i < 4 && out->data[i] && out->linesize[i]; i++) {
313  int hsub = s->draw.hsub[i];
314  int vsub = s->draw.vsub[i];
315  out->data[i] -= (s->x >> hsub) * s->draw.pixelstep[i] +
316  (s->y >> vsub) * out->linesize[i];
317  }
318  }
319 
320  /* top bar */
321  if (s->y) {
322  ff_fill_rectangle(&s->draw, &s->color,
323  out->data, out->linesize,
324  0, 0, s->w, s->y);
325  }
326 
327  /* bottom bar */
328  if (s->h > s->y + s->in_h) {
329  ff_fill_rectangle(&s->draw, &s->color,
330  out->data, out->linesize,
331  0, s->y + s->in_h, s->w, s->h - s->y - s->in_h);
332  }
333 
334  /* left border */
335  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
336  0, s->y, s->x, in->height);
337 
338  if (needs_copy) {
340  out->data, out->linesize, in->data, in->linesize,
341  s->x, s->y, 0, 0, in->width, in->height);
342  }
343 
344  /* right border */
345  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
346  s->x + s->in_w, s->y, s->w - s->x - s->in_w,
347  in->height);
348 
349  out->width = s->w;
350  out->height = s->h;
351 
352  if (in != out)
353  av_frame_free(&in);
354  return ff_filter_frame(inlink->dst->outputs[0], out);
355 }
356 
357 #define OFFSET(x) offsetof(PadContext, x)
358 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
359 
360 static const AVOption pad_options[] = {
361  { "width", "set the pad area width expression", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
362  { "w", "set the pad area width expression", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
363  { "height", "set the pad area height expression", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
364  { "h", "set the pad area height expression", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
365  { "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 },
366  { "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 },
367  { "color", "set the color of the padded area border", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
368  { NULL }
369 };
370 
372 
374  {
375  .name = "default",
376  .type = AVMEDIA_TYPE_VIDEO,
377  .config_props = config_input,
378  .get_video_buffer = get_video_buffer,
379  .filter_frame = filter_frame,
380  },
381  { NULL }
382 };
383 
385  {
386  .name = "default",
387  .type = AVMEDIA_TYPE_VIDEO,
388  .config_props = config_output,
389  },
390  { NULL }
391 };
392 
394  .name = "pad",
395  .description = NULL_IF_CONFIG_SMALL("Pad the input video."),
396  .priv_size = sizeof(PadContext),
397  .priv_class = &pad_class,
399  .inputs = avfilter_vf_pad_inputs,
400  .outputs = avfilter_vf_pad_outputs,
401 };
int plane
Definition: avisynth_c.h:291
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:530
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
Definition: vf_pad.c:200
#define FLAGS
Definition: vf_pad.c:358
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
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:243
AVOption.
Definition: opt.h:255
misc image utilities
uint8_t hsub[MAX_PLANES]
Definition: drawutils.h:54
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
Main libavfilter public API header.
FFDrawColor color
Definition: vf_pad.c:91
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:441
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:83
int x
Definition: vf_pad.c:82
int num
numerator
Definition: rational.h:44
Various defines for YUV<->RGB conversion.
char * x_expr
width expression string
Definition: vf_pad.c:87
static const AVFilterPad avfilter_vf_pad_outputs[]
Definition: vf_pad.c:384
static int config_output(AVFilterLink *outlink)
Definition: vf_pad.c:191
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:109
Definition: vf_pad.c:64
int w
Definition: vf_pad.c:81
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:518
const char * name
Pad name.
Definition: internal.h:67
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
AVFILTER_DEFINE_CLASS(pad)
if()
Definition: avfilter.c:975
uint8_t
Definition: vf_pad.c:67
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
Definition: vf_pad.c:66
static const char *const var_names[]
Definition: vf_pad.c:44
Definition: vf_pad.c:61
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:61
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:717
int width
width and height of the video frame
Definition: frame.h:220
#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:542
Definition: vf_pad.c:68
#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:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
void * priv
private data for use by the filter
Definition: avfilter.h:654
#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:94
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:203
simple assert() macros that are a bit more flexible than ISO C assert().
uint8_t vsub_max
Definition: drawutils.h:57
static const AVOption pad_options[]
Definition: vf_pad.c:360
#define FFMAX(a, b)
Definition: common.h:64
var_name
Definition: aeval.c:46
static int frame_needs_copy(PadContext *s, AVFrame *frame)
Definition: vf_pad.c:278
#define FFSIGN(a)
Definition: common.h:62
ret
Definition: avfilter.c:974
static int buffer_needs_copy(PadContext *s, AVFrame *frame, AVBufferRef *buf)
Definition: vf_pad.c:226
AVBufferRef * av_frame_get_plane_buffer(AVFrame *frame, int plane)
Get the buffer reference a given data plane is stored in.
Definition: frame.c:556
Definition: vf_pad.c:60
char * w_expr
width expression string
Definition: vf_pad.c:85
int y
offsets of the input area with respect to the padded area
Definition: vf_pad.c:82
int in_w
Definition: vf_pad.c:83
Definition: vf_pad.c:62
#define OFFSET(x)
Definition: vf_pad.c:357
#define FF_ARRAY_ELEMS(a)
uint8_t rgba_color[4]
color for the padding area
Definition: vf_pad.c:89
misc drawing utilities
Definition: vf_pad.c:71
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:491
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
static const AVFilterPad avfilter_vf_pad_inputs[]
Definition: vf_pad.c:373
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:553
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:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
Definition: vf_pad.c:65
const char * name
Filter name.
Definition: avfilter.h:474
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:161
Definition: vf_pad.c:63
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
int size
Size of data in bytes.
Definition: buffer.h:93
static int query_formats(AVFilterContext *ctx)
Definition: vf_pad.c:74
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
A reference to a data buffer.
Definition: buffer.h:81
common internal and external API header
int den
denominator
Definition: rational.h:45
FFDrawContext draw
Definition: vf_pad.c:90
char * y_expr
height expression string
Definition: vf_pad.c:88
#define NAN
Definition: math.h:28
int pixelstep[MAX_PLANES]
Definition: drawutils.h:52
AVFilter ff_vf_pad
Definition: vf_pad.c:393
int h
output dimensions, a value of 0 will result in the input size
Definition: vf_pad.c:81
char * h_expr
height expression string
Definition: vf_pad.c:86
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:265
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-> out
An instance of a filter.
Definition: avfilter.h:633
int height
Definition: frame.h:220
uint8_t vsub[MAX_PLANES]
Definition: drawutils.h:55
void INT64 start
Definition: avisynth_c.h:553
internal API functions
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_pad.c:291
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:551
simple arithmetic expression evaluator