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avf_showwaves.c
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1 /*
2  * Copyright (c) 2012 Stefano Sabatini
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 filter
24  */
25 
26 #include "libavutil/avassert.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
30 #include "avfilter.h"
31 #include "formats.h"
32 #include "audio.h"
33 #include "video.h"
34 #include "internal.h"
35 
42 };
43 
44 struct frame_node {
46  struct frame_node *next;
47 };
48 
49 typedef struct {
50  const AVClass *class;
51  int w, h;
53  int buf_idx;
54  int16_t *buf_idy; /* y coordinate of previous sample for each channel */
57  int n;
59  int mode; ///< ShowWavesMode
61  void (*draw_sample)(uint8_t *buf, int height, int linesize,
62  int16_t sample, int16_t *prev_y, int intensity);
63 
64  /* single picture */
68  int64_t total_samples;
69  int64_t *sum; /* abs sum of the samples per channel */
71 
72 #define OFFSET(x) offsetof(ShowWavesContext, x)
73 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
74 
75 static const AVOption showwaves_options[] = {
76  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
77  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
78  { "mode", "select display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_POINT}, 0, MODE_NB-1, FLAGS, "mode"},
79  { "point", "draw a point for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_POINT}, .flags=FLAGS, .unit="mode"},
80  { "line", "draw a line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LINE}, .flags=FLAGS, .unit="mode"},
81  { "p2p", "draw a line between samples", 0, AV_OPT_TYPE_CONST, {.i64=MODE_P2P}, .flags=FLAGS, .unit="mode"},
82  { "cline", "draw a centered line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CENTERED_LINE}, .flags=FLAGS, .unit="mode"},
83  { "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
84  { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
85  { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
86  { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
87  { NULL }
88 };
89 
90 AVFILTER_DEFINE_CLASS(showwaves);
91 
92 static av_cold void uninit(AVFilterContext *ctx)
93 {
94  ShowWavesContext *showwaves = ctx->priv;
95 
96  av_frame_free(&showwaves->outpicref);
97  av_freep(&showwaves->buf_idy);
98 
99  if (showwaves->single_pic) {
100  struct frame_node *node = showwaves->audio_frames;
101  while (node) {
102  struct frame_node *tmp = node;
103 
104  node = node->next;
105  av_frame_free(&tmp->frame);
106  av_freep(&tmp);
107  }
108  av_freep(&showwaves->sum);
109  showwaves->last_frame = NULL;
110  }
111 }
112 
114 {
117  AVFilterLink *inlink = ctx->inputs[0];
118  AVFilterLink *outlink = ctx->outputs[0];
120  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
121 
122  /* set input audio formats */
123  formats = ff_make_format_list(sample_fmts);
124  if (!formats)
125  return AVERROR(ENOMEM);
126  ff_formats_ref(formats, &inlink->out_formats);
127 
128  layouts = ff_all_channel_layouts();
129  if (!layouts)
130  return AVERROR(ENOMEM);
131  ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts);
132 
133  formats = ff_all_samplerates();
134  if (!formats)
135  return AVERROR(ENOMEM);
136  ff_formats_ref(formats, &inlink->out_samplerates);
137 
138  /* set output video format */
139  formats = ff_make_format_list(pix_fmts);
140  if (!formats)
141  return AVERROR(ENOMEM);
142  ff_formats_ref(formats, &outlink->in_formats);
143 
144  return 0;
145 }
146 
147 static int config_output(AVFilterLink *outlink)
148 {
149  AVFilterContext *ctx = outlink->src;
150  AVFilterLink *inlink = ctx->inputs[0];
151  ShowWavesContext *showwaves = ctx->priv;
152  int nb_channels = inlink->channels;
153 
154  if (!showwaves->n)
155  showwaves->n = FFMAX(1, ((double)inlink->sample_rate / (showwaves->w * av_q2d(showwaves->rate))) + 0.5);
156 
157  showwaves->buf_idx = 0;
158  if (!(showwaves->buf_idy = av_mallocz_array(nb_channels, sizeof(*showwaves->buf_idy)))) {
159  av_log(ctx, AV_LOG_ERROR, "Could not allocate showwaves buffer\n");
160  return AVERROR(ENOMEM);
161  }
162  outlink->w = showwaves->w;
163  outlink->h = showwaves->h;
164  outlink->sample_aspect_ratio = (AVRational){1,1};
165 
166  outlink->frame_rate = av_div_q((AVRational){inlink->sample_rate,showwaves->n},
167  (AVRational){showwaves->w,1});
168 
169  av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%d\n",
170  showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), showwaves->n);
171  return 0;
172 }
173 
174 inline static int push_frame(AVFilterLink *outlink)
175 {
176  AVFilterContext *ctx = outlink->src;
177  AVFilterLink *inlink = ctx->inputs[0];
178  ShowWavesContext *showwaves = outlink->src->priv;
179  int nb_channels = inlink->channels;
180  int ret, i;
181 
182  if ((ret = ff_filter_frame(outlink, showwaves->outpicref)) >= 0)
183  showwaves->req_fullfilled = 1;
184  showwaves->outpicref = NULL;
185  showwaves->buf_idx = 0;
186  for (i = 0; i < nb_channels; i++)
187  showwaves->buf_idy[i] = 0;
188  return ret;
189 }
190 
191 static int push_single_pic(AVFilterLink *outlink)
192 {
193  AVFilterContext *ctx = outlink->src;
194  AVFilterLink *inlink = ctx->inputs[0];
195  ShowWavesContext *showwaves = ctx->priv;
196  int64_t n = 0, max_samples = showwaves->total_samples / outlink->w;
197  AVFrame *out = showwaves->outpicref;
198  struct frame_node *node;
199  const int nb_channels = inlink->channels;
200  const int x = 255 / (showwaves->split_channels ? 1 : nb_channels);
201  const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
202  const int linesize = out->linesize[0];
203  int col = 0;
204  int64_t *sum = showwaves->sum;
205 
206  av_log(ctx, AV_LOG_DEBUG, "Create frame averaging %"PRId64" samples per column\n", max_samples);
207 
208  memset(sum, 0, nb_channels);
209 
210  for (node = showwaves->audio_frames; node; node = node->next) {
211  int i;
212  const AVFrame *frame = node->frame;
213  const int16_t *p = (const int16_t *)frame->data[0];
214 
215  for (i = 0; i < frame->nb_samples; i++) {
216  int ch;
217 
218  for (ch = 0; ch < nb_channels; ch++)
219  sum[ch] += abs(p[ch + i*nb_channels]) << 1;
220  if (n++ == max_samples) {
221  for (ch = 0; ch < nb_channels; ch++) {
222  int16_t sample = sum[ch] / max_samples;
223  uint8_t *buf = out->data[0] + col;
224  if (showwaves->split_channels)
225  buf += ch*ch_height*linesize;
226  av_assert0(col < outlink->w);
227  showwaves->draw_sample(buf, ch_height, linesize, sample, &showwaves->buf_idy[ch], x);
228  sum[ch] = 0;
229  }
230  col++;
231  n = 0;
232  }
233  }
234  }
235 
236  return push_frame(outlink);
237 }
238 
239 
240 static int request_frame(AVFilterLink *outlink)
241 {
242  ShowWavesContext *showwaves = outlink->src->priv;
243  AVFilterLink *inlink = outlink->src->inputs[0];
244  int ret;
245 
246  showwaves->req_fullfilled = 0;
247  do {
248  ret = ff_request_frame(inlink);
249  } while (!showwaves->req_fullfilled && ret >= 0);
250 
251  if (ret == AVERROR_EOF && showwaves->outpicref) {
252  if (showwaves->single_pic)
253  push_single_pic(outlink);
254  else
255  push_frame(outlink);
256  }
257 
258  return ret;
259 }
260 
261 static void draw_sample_point(uint8_t *buf, int height, int linesize,
262  int16_t sample, int16_t *prev_y, int intensity)
263 {
264  const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
265  if (h >= 0 && h < height)
266  buf[h * linesize] += intensity;
267 }
268 
269 static void draw_sample_line(uint8_t *buf, int height, int linesize,
270  int16_t sample, int16_t *prev_y, int intensity)
271 {
272  int k;
273  const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
274  int start = height/2;
275  int end = av_clip(h, 0, height-1);
276  if (start > end)
277  FFSWAP(int16_t, start, end);
278  for (k = start; k < end; k++)
279  buf[k * linesize] += intensity;
280 }
281 
282 static void draw_sample_p2p(uint8_t *buf, int height, int linesize,
283  int16_t sample, int16_t *prev_y, int intensity)
284 {
285  int k;
286  const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
287  if (h >= 0 && h < height) {
288  buf[h * linesize] += intensity;
289  if (*prev_y && h != *prev_y) {
290  int start = *prev_y;
291  int end = av_clip(h, 0, height-1);
292  if (start > end)
293  FFSWAP(int16_t, start, end);
294  for (k = start + 1; k < end; k++)
295  buf[k * linesize] += intensity;
296  }
297  }
298  *prev_y = h;
299 }
300 
301 static void draw_sample_cline(uint8_t *buf, int height, int linesize,
302  int16_t sample, int16_t *prev_y, int intensity)
303 {
304  int k;
305  const int h = av_rescale(abs(sample), height, INT16_MAX);
306  const int start = (height - h) / 2;
307  const int end = start + h;
308  for (k = start; k < end; k++)
309  buf[k * linesize] += intensity;
310 }
311 
312 static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
313  const AVFilterLink *inlink, AVFilterLink *outlink,
314  const AVFrame *in)
315 {
316  if (!showwaves->outpicref) {
317  int j;
318  AVFrame *out = showwaves->outpicref =
319  ff_get_video_buffer(outlink, outlink->w, outlink->h);
320  if (!out)
321  return AVERROR(ENOMEM);
322  out->width = outlink->w;
323  out->height = outlink->h;
324  out->pts = in->pts + av_rescale_q((p - (int16_t *)in->data[0]) / inlink->channels,
325  av_make_q(1, inlink->sample_rate),
326  outlink->time_base);
327  for (j = 0; j < outlink->h; j++)
328  memset(out->data[0] + j*out->linesize[0], 0, outlink->w);
329  }
330  return 0;
331 }
332 
333 static av_cold int init(AVFilterContext *ctx)
334 {
335  ShowWavesContext *showwaves = ctx->priv;
336 
337  if (!strcmp(ctx->filter->name, "showwavespic")) {
338  showwaves->single_pic = 1;
339  showwaves->mode = MODE_CENTERED_LINE;
340  }
341 
342  switch (showwaves->mode) {
343  case MODE_POINT: showwaves->draw_sample = draw_sample_point; break;
344  case MODE_LINE: showwaves->draw_sample = draw_sample_line; break;
345  case MODE_P2P: showwaves->draw_sample = draw_sample_p2p; break;
346  case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline; break;
347  default:
348  return AVERROR_BUG;
349  }
350  return 0;
351 }
352 
353 #if CONFIG_SHOWWAVES_FILTER
354 
355 static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
356 {
357  AVFilterContext *ctx = inlink->dst;
358  AVFilterLink *outlink = ctx->outputs[0];
359  ShowWavesContext *showwaves = ctx->priv;
360  const int nb_samples = insamples->nb_samples;
361  AVFrame *outpicref = showwaves->outpicref;
362  int16_t *p = (int16_t *)insamples->data[0];
363  int nb_channels = inlink->channels;
364  int i, j, ret = 0;
365  const int n = showwaves->n;
366  const int x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * n); /* multiplication factor, pre-computed to avoid in-loop divisions */
367  const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
368 
369  /* draw data in the buffer */
370  for (i = 0; i < nb_samples; i++) {
371 
372  ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
373  if (ret < 0)
374  goto end;
375  outpicref = showwaves->outpicref;
376 
377  for (j = 0; j < nb_channels; j++) {
378  uint8_t *buf = outpicref->data[0] + showwaves->buf_idx;
379  const int linesize = outpicref->linesize[0];
380  if (showwaves->split_channels)
381  buf += j*ch_height*linesize;
382  showwaves->draw_sample(buf, ch_height, linesize, *p++,
383  &showwaves->buf_idy[j], x);
384  }
385 
386  showwaves->sample_count_mod++;
387  if (showwaves->sample_count_mod == n) {
388  showwaves->sample_count_mod = 0;
389  showwaves->buf_idx++;
390  }
391  if (showwaves->buf_idx == showwaves->w)
392  if ((ret = push_frame(outlink)) < 0)
393  break;
394  outpicref = showwaves->outpicref;
395  }
396 
397 end:
398  av_frame_free(&insamples);
399  return ret;
400 }
401 
402 static const AVFilterPad showwaves_inputs[] = {
403  {
404  .name = "default",
405  .type = AVMEDIA_TYPE_AUDIO,
406  .filter_frame = showwaves_filter_frame,
407  },
408  { NULL }
409 };
410 
411 static const AVFilterPad showwaves_outputs[] = {
412  {
413  .name = "default",
414  .type = AVMEDIA_TYPE_VIDEO,
415  .config_props = config_output,
416  .request_frame = request_frame,
417  },
418  { NULL }
419 };
420 
421 AVFilter ff_avf_showwaves = {
422  .name = "showwaves",
423  .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
424  .init = init,
425  .uninit = uninit,
426  .query_formats = query_formats,
427  .priv_size = sizeof(ShowWavesContext),
428  .inputs = showwaves_inputs,
429  .outputs = showwaves_outputs,
430  .priv_class = &showwaves_class,
431 };
432 
433 #endif // CONFIG_SHOWWAVES_FILTER
434 
435 #if CONFIG_SHOWWAVESPIC_FILTER
436 
437 #define OFFSET(x) offsetof(ShowWavesContext, x)
438 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
439 
440 static const AVOption showwavespic_options[] = {
441  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
442  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
443  { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
444  { NULL }
445 };
446 
447 AVFILTER_DEFINE_CLASS(showwavespic);
448 
449 static int showwavespic_config_input(AVFilterLink *inlink)
450 {
451  AVFilterContext *ctx = inlink->dst;
452  ShowWavesContext *showwaves = ctx->priv;
453 
454  if (showwaves->single_pic) {
455  showwaves->sum = av_mallocz_array(inlink->channels, sizeof(*showwaves->sum));
456  if (!showwaves->sum)
457  return AVERROR(ENOMEM);
458  }
459 
460  return 0;
461 }
462 
463 static int showwavespic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
464 {
465  AVFilterContext *ctx = inlink->dst;
466  AVFilterLink *outlink = ctx->outputs[0];
467  ShowWavesContext *showwaves = ctx->priv;
468  int16_t *p = (int16_t *)insamples->data[0];
469  int ret = 0;
470 
471  if (showwaves->single_pic) {
472  struct frame_node *f;
473 
474  ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
475  if (ret < 0)
476  goto end;
477 
478  /* queue the audio frame */
479  f = av_malloc(sizeof(*f));
480  if (!f) {
481  ret = AVERROR(ENOMEM);
482  goto end;
483  }
484  f->frame = insamples;
485  f->next = NULL;
486  if (!showwaves->last_frame) {
487  showwaves->audio_frames =
488  showwaves->last_frame = f;
489  } else {
490  showwaves->last_frame->next = f;
491  showwaves->last_frame = f;
492  }
493  showwaves->total_samples += insamples->nb_samples;
494 
495  return 0;
496  }
497 
498 end:
499  av_frame_free(&insamples);
500  return ret;
501 }
502 
503 static const AVFilterPad showwavespic_inputs[] = {
504  {
505  .name = "default",
506  .type = AVMEDIA_TYPE_AUDIO,
507  .config_props = showwavespic_config_input,
508  .filter_frame = showwavespic_filter_frame,
509  },
510  { NULL }
511 };
512 
513 static const AVFilterPad showwavespic_outputs[] = {
514  {
515  .name = "default",
516  .type = AVMEDIA_TYPE_VIDEO,
517  .config_props = config_output,
518  .request_frame = request_frame,
519  },
520  { NULL }
521 };
522 
523 AVFilter ff_avf_showwavespic = {
524  .name = "showwavespic",
525  .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output single picture."),
526  .init = init,
527  .uninit = uninit,
528  .query_formats = query_formats,
529  .priv_size = sizeof(ShowWavesContext),
530  .inputs = showwavespic_inputs,
531  .outputs = showwavespic_outputs,
532  .priv_class = &showwavespic_class,
533 };
534 
535 #endif // CONFIG_SHOWWAVESPIC_FILTER
ShowWavesMode
Definition: avf_showwaves.c:36
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
static void draw_sample_p2p(uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
AVOption.
Definition: opt.h:255
static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p, const AVFilterLink *inlink, AVFilterLink *outlink, const AVFrame *in)
int16_t * buf_idy
Definition: avf_showwaves.c:54
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
#define OFFSET(x)
Definition: avf_showwaves.c:72
Main libavfilter public API header.
static enum AVSampleFormat formats[]
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
static AVRational av_make_q(int num, int den)
Create a rational.
Definition: rational.h:53
#define sample
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:67
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:641
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:417
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
if()
Definition: avfilter.c:975
uint8_t
#define av_cold
Definition: attributes.h:74
#define av_malloc(s)
mode
Definition: f_perms.c:27
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_showwaves.c:92
static AVFrame * frame
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
int mode
ShowWavesMode.
Definition: avf_showwaves.c:59
A filter pad used for either input or output.
Definition: internal.h:61
int64_t total_samples
Definition: avf_showwaves.c:68
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
AVRational rate
Definition: avf_showwaves.c:52
static void draw_sample_cline(uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
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
struct frame_node * last_frame
Definition: avf_showwaves.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:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
AVRational av_div_q(AVRational b, AVRational c)
Divide one rational by another.
Definition: rational.c:88
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
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFMAX(a, b)
Definition: common.h:64
void(* draw_sample)(uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
Definition: avf_showwaves.c:61
AVFrame * outpicref
Definition: avf_showwaves.c:55
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:127
struct frame_node * audio_frames
Definition: avf_showwaves.c:66
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:422
static int push_single_pic(AVFilterLink *outlink)
ret
Definition: avfilter.c:974
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int n
Definition: avisynth_c.h:547
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:385
A list of supported channel layouts.
Definition: formats.h:85
struct frame_node * next
Definition: avf_showwaves.c:46
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:59
static int config_output(AVFilterLink *outlink)
static int push_frame(AVFilterLink *outlink)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
static int request_frame(AVFilterLink *outlink)
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
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
AVFILTER_DEFINE_CLASS(showwaves)
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
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
rational number numerator/denominator
Definition: rational.h:43
static int query_formats(AVFilterContext *ctx)
offset must point to AVRational
Definition: opt.h:235
const char * name
Filter name.
Definition: avfilter.h:474
offset must point to two consecutive integers
Definition: opt.h:232
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:379
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
Y , 8bpp.
Definition: pixfmt.h:71
signed 16 bits
Definition: samplefmt.h:62
#define FLAGS
Definition: avf_showwaves.c:73
A list of supported formats for one end of a filter link.
Definition: formats.h:64
static void draw_sample_point(uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)
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
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:228
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
int height
Definition: frame.h:220
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:553
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:343
#define FFSWAP(type, a, b)
Definition: common.h:69
int nb_channels
internal API functions
static const AVOption showwaves_options[]
Definition: avf_showwaves.c:75
static av_cold int init(AVFilterContext *ctx)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:225
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:636
for(j=16;j >0;--j)
AVFrame * frame
Definition: avf_showwaves.c:45
static void draw_sample_line(uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity)