FFmpeg  4.3.7
avf_avectorscope.c
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1 /*
2  * Copyright (c) 2013 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * audio to video multimedia vectorscope filter
24  */
25 
26 #include "libavutil/avassert.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.h"
33 #include "audio.h"
34 #include "video.h"
35 #include "internal.h"
36 
42 };
43 
45  DOT,
48 };
49 
51  LIN,
54  LOG,
56 };
57 
58 typedef struct AudioVectorScopeContext {
59  const AVClass *class;
61  int w, h;
62  int hw, hh;
63  int mode;
64  int draw;
65  int scale;
66  int contrast[4];
67  int fade[4];
68  double zoom;
69  int swap;
70  int mirror;
71  unsigned prev_x, prev_y;
75 
76 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
77 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
78 
79 static const AVOption avectorscope_options[] = {
80  { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
81  { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
82  { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, FLAGS, "mode" },
83  { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
84  { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, FLAGS, "mode" },
85  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
86  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
87  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
88  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
89  { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, FLAGS },
90  { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
91  { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, FLAGS },
92  { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS },
93  { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
94  { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
95  { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
96  { "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
97  { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, FLAGS },
98  { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, FLAGS, "draw" },
99  { "dot", "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, FLAGS, "draw" },
100  { "line", "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "draw" },
101  { "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, FLAGS, "scale" },
102  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, FLAGS, "scale" },
103  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
104  { "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
105  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
106  { "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
107  { "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, FLAGS, "mirror" },
108  { "none", "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mirror" },
109  { "x", "mirror x", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mirror" },
110  { "y", "mirror y", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mirror" },
111  { "xy", "mirror both", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "mirror" },
112  { NULL }
113 };
114 
115 AVFILTER_DEFINE_CLASS(avectorscope);
116 
117 static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
118 {
119  const int linesize = s->outpicref->linesize[0];
120  uint8_t *dst;
121 
122  if (s->zoom > 1) {
123  if (y >= s->h || x >= s->w)
124  return;
125  } else {
126  y = FFMIN(y, s->h - 1);
127  x = FFMIN(x, s->w - 1);
128  }
129 
130  dst = &s->outpicref->data[0][y * linesize + x * 4];
131  dst[0] = FFMIN(dst[0] + s->contrast[0], 255);
132  dst[1] = FFMIN(dst[1] + s->contrast[1], 255);
133  dst[2] = FFMIN(dst[2] + s->contrast[2], 255);
134  dst[3] = FFMIN(dst[3] + s->contrast[3], 255);
135 }
136 
137 static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
138 {
139  int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
140  int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
141  int err = (dx>dy ? dx : -dy) / 2, e2;
142 
143  for (;;) {
144  draw_dot(s, x0, y0);
145 
146  if (x0 == x1 && y0 == y1)
147  break;
148 
149  e2 = err;
150 
151  if (e2 >-dx) {
152  err -= dy;
153  x0 += sx;
154  }
155 
156  if (e2 < dy) {
157  err += dx;
158  y0 += sy;
159  }
160  }
161 }
162 
164 {
165  const int linesize = s->outpicref->linesize[0];
166  int i, j;
167 
168  if (s->fade[0] || s->fade[1] || s->fade[2]) {
169  uint8_t *d = s->outpicref->data[0];
170  for (i = 0; i < s->h; i++) {
171  for (j = 0; j < s->w*4; j+=4) {
172  d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
173  d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
174  d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
175  d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
176  }
177  d += linesize;
178  }
179  }
180 }
181 
183 {
186  AVFilterLink *inlink = ctx->inputs[0];
187  AVFilterLink *outlink = ctx->outputs[0];
189  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
190  int ret;
191 
192  formats = ff_make_format_list(sample_fmts);
193  if ((ret = ff_formats_ref (formats, &inlink->out_formats )) < 0 ||
194  (ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 ||
195  (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0)
196  return ret;
197 
198  formats = ff_all_samplerates();
199  if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
200  return ret;
201 
202  formats = ff_make_format_list(pix_fmts);
203  if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
204  return ret;
205 
206  return 0;
207 }
208 
209 static int config_input(AVFilterLink *inlink)
210 {
211  AVFilterContext *ctx = inlink->dst;
213 
215 
216  return 0;
217 }
218 
219 static int config_output(AVFilterLink *outlink)
220 {
221  AudioVectorScopeContext *s = outlink->src->priv;
222 
223  outlink->w = s->w;
224  outlink->h = s->h;
225  outlink->sample_aspect_ratio = (AVRational){1,1};
226  outlink->frame_rate = s->frame_rate;
227 
228  s->prev_x = s->hw = s->w / 2;
229  s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;
230 
231  return 0;
232 }
233 
234 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
235 {
236  AVFilterContext *ctx = inlink->dst;
237  AVFilterLink *outlink = ctx->outputs[0];
239  const int hw = s->hw;
240  const int hh = s->hh;
241  AVFrame *clone;
242  unsigned x, y;
243  unsigned prev_x = s->prev_x, prev_y = s->prev_y;
244  double zoom = s->zoom;
245  int i;
246 
247  if (!s->outpicref || s->outpicref->width != outlink->w ||
248  s->outpicref->height != outlink->h) {
250  s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
251  if (!s->outpicref) {
252  av_frame_free(&insamples);
253  return AVERROR(ENOMEM);
254  }
255 
257  for (i = 0; i < outlink->h; i++)
258  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
259  }
260  s->outpicref->pts = insamples->pts;
261 
262  fade(s);
263 
264  if (zoom < 1) {
265  float max = 0;
266 
267  switch (insamples->format) {
268  case AV_SAMPLE_FMT_S16: {
269  int16_t *samples = (int16_t *)insamples->data[0];
270 
271  for (i = 0; i < insamples->nb_samples * 2; i++) {
272  float sample = samples[i] / (float)INT16_MAX;
273  max = FFMAX(FFABS(sample), max);
274  }
275 
276  }
277  break;
278  case AV_SAMPLE_FMT_FLT: {
279  float *samples = (float *)insamples->data[0];
280 
281  for (i = 0; i < insamples->nb_samples * 2; i++) {
282  max = FFMAX(FFABS(samples[i]), max);
283  }
284  }
285  break;
286  default:
287  av_assert2(0);
288  }
289 
290  zoom = 1. / max;
291  }
292 
293  for (i = 0; i < insamples->nb_samples; i++) {
294  int16_t *samples = (int16_t *)insamples->data[0] + i * 2;
295  float *samplesf = (float *)insamples->data[0] + i * 2;
296  float src[2];
297 
298  switch (insamples->format) {
299  case AV_SAMPLE_FMT_S16:
300  src[0] = samples[0] / (float)INT16_MAX;
301  src[1] = samples[1] / (float)INT16_MAX;
302  break;
303  case AV_SAMPLE_FMT_FLT:
304  src[0] = samplesf[0];
305  src[1] = samplesf[1];
306  break;
307  default:
308  av_assert2(0);
309  }
310 
311  switch (s->scale) {
312  case SQRT:
313  src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0]));
314  src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1]));
315  break;
316  case CBRT:
317  src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0]));
318  src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1]));
319  break;
320  case LOG:
321  src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2);
322  src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2);
323  break;
324  }
325 
326  if (s->mirror & 1)
327  src[0] = -src[0];
328 
329  if (s->mirror & 2)
330  src[1] = -src[1];
331 
332  if (s->swap)
333  FFSWAP(float, src[0], src[1]);
334 
335  if (s->mode == LISSAJOUS) {
336  x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
337  y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
338  } else if (s->mode == LISSAJOUS_XY) {
339  x = (src[1] * zoom + 1) * hw;
340  y = (src[0] * zoom + 1) * hh;
341  } else {
342  float sx, sy, cx, cy;
343 
344  sx = src[1] * zoom;
345  sy = src[0] * zoom;
346  cx = sx * sqrtf(1 - 0.5 * sy * sy);
347  cy = sy * sqrtf(1 - 0.5 * sx * sx);
348  x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
349  y = s->h - s->h * fabsf(cx + cy) * .7;
350  }
351 
352  if (s->draw == DOT) {
353  draw_dot(s, x, y);
354  } else {
355  draw_line(s, x, y, prev_x, prev_y);
356  }
357  prev_x = x;
358  prev_y = y;
359  }
360 
361  s->prev_x = x, s->prev_y = y;
362  av_frame_free(&insamples);
363 
364  clone = av_frame_clone(s->outpicref);
365  if (!clone)
366  return AVERROR(ENOMEM);
367 
368  return ff_filter_frame(outlink, clone);
369 }
370 
372 {
373  AVFilterLink *inlink = ctx->inputs[0];
374  AVFilterLink *outlink = ctx->outputs[0];
376  AVFrame *in;
377  int ret;
378 
379  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
380 
381  ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
382  if (ret < 0)
383  return ret;
384  if (ret > 0)
385  return filter_frame(inlink, in);
386 
387  FF_FILTER_FORWARD_STATUS(inlink, outlink);
388  FF_FILTER_FORWARD_WANTED(outlink, inlink);
389 
390  return FFERROR_NOT_READY;
391 }
392 
394 {
396 
398 }
399 
401  {
402  .name = "default",
403  .type = AVMEDIA_TYPE_AUDIO,
404  .config_props = config_input,
405  },
406  { NULL }
407 };
408 
410  {
411  .name = "default",
412  .type = AVMEDIA_TYPE_VIDEO,
413  .config_props = config_output,
414  },
415  { NULL }
416 };
417 
419  .name = "avectorscope",
420  .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
421  .uninit = uninit,
422  .query_formats = query_formats,
423  .priv_size = sizeof(AudioVectorScopeContext),
424  .activate = activate,
425  .inputs = audiovectorscope_inputs,
426  .outputs = audiovectorscope_outputs,
427  .priv_class = &avectorscope_class,
428 };
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
Main libavfilter public API header.
static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
static av_cold void uninit(AVFilterContext *ctx)
int num
Numerator.
Definition: rational.h:59
#define FFERROR_NOT_READY
Filters implementation helper functions.
Definition: filters.h:34
static int activate(AVFilterContext *ctx)
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:104
#define AV_CH_LAYOUT_STEREO
#define sample
AVFilter ff_avf_avectorscope
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:300
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:479
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
uint8_t
#define av_cold
Definition: attributes.h:88
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
static const AVFilterPad audiovectorscope_outputs[]
#define max(a, b)
Definition: cuda_runtime.h:33
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:199
A filter pad used for either input or output.
Definition: internal.h:54
#define src
Definition: vp8dsp.c:254
#define FLAGS
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int width
Definition: frame.h:358
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:356
#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:203
static int config_input(AVFilterLink *inlink)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
void * priv
private data for use by the filter
Definition: avfilter.h:353
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVOption avectorscope_options[]
VectorScopeScale
#define FFMAX(a, b)
Definition: common.h:94
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
VectorScopeMode
#define FF_FILTER_FORWARD_WANTED(outlink, inlink)
Forward the frame_wanted_out flag from an output link to an input link.
Definition: filters.h:254
audio channel layout utility functions
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define FFMIN(a, b)
Definition: common.h:96
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:484
#define FFSIGN(a)
Definition: common.h:73
AVFormatContext * ctx
Definition: movenc.c:48
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
static const AVFilterPad audiovectorscope_inputs[]
static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:541
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
AVFILTER_DEFINE_CLASS(avectorscope)
static int config_output(AVFilterLink *outlink)
A list of supported channel layouts.
Definition: formats.h:85
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:373
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link&#39;s FIFO and update the link&#39;s stats.
Definition: avfilter.c:1495
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:388
static av_always_inline float cbrtf(float x)
Definition: libm.h:61
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
offset must point to AVRational
Definition: opt.h:236
const char * name
Filter name.
Definition: avfilter.h:148
offset must point to two consecutive integers
Definition: opt.h:233
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
#define FF_FILTER_FORWARD_STATUS(inlink, outlink)
Acknowledge the status on an input link and forward it to an output link.
Definition: filters.h:226
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:439
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
static int query_formats(AVFilterContext *ctx)
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
signed 16 bits
Definition: samplefmt.h:61
int den
Denominator.
Definition: rational.h:60
A list of supported formats for one end of a filter link.
Definition: formats.h:64
uint64_t layout
VectorScopeDraw
An instance of a filter.
Definition: avfilter.h:338
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:731
int height
Definition: frame.h:358
formats
Definition: signature.h:48
#define FFSWAP(type, a, b)
Definition: common.h:99
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:366
for(j=16;j >0;--j)
#define OFFSET(x)