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aeval.c
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1 /*
2  * Copyright (c) 2011 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  * eval audio source
24  */
25 
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
29 #include "libavutil/eval.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/parseutils.h"
32 #include "avfilter.h"
33 #include "audio.h"
34 #include "internal.h"
35 
36 static const char * const var_names[] = {
37  "ch", ///< the value of the current channel
38  "n", ///< number of frame
39  "nb_in_channels",
40  "nb_out_channels",
41  "t", ///< timestamp expressed in seconds
42  "s", ///< sample rate
43  NULL
44 };
45 
46 enum var_name {
54 };
55 
56 typedef struct EvalContext {
57  const AVClass *class;
60  int64_t chlayout;
61  char *chlayout_str;
62  int nb_channels; ///< number of output channels
63  int nb_in_channels; ///< number of input channels
64  int same_chlayout; ///< set output as input channel layout
65  int64_t pts;
67  char *exprs;
68  int nb_samples; ///< number of samples per requested frame
69  int64_t duration;
70  uint64_t n;
72  double *channel_values;
74 } EvalContext;
75 
76 static double val(void *priv, double ch)
77 {
78  EvalContext *eval = priv;
79  return eval->channel_values[FFMIN((int)ch, eval->nb_in_channels-1)];
80 }
81 
82 static double (* const aeval_func1[])(void *, double) = { val, NULL };
83 static const char * const aeval_func1_names[] = { "val", NULL };
84 
85 #define OFFSET(x) offsetof(EvalContext, x)
86 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
87 
88 static const AVOption aevalsrc_options[]= {
89  { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
90  { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 0, INT_MAX, FLAGS },
91  { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 0, INT_MAX, FLAGS },
92  { "sample_rate", "set the sample rate", OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS },
93  { "s", "set the sample rate", OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS },
94  { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS },
95  { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS },
96  { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
97  { "c", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
98  { NULL }
99 };
100 
101 AVFILTER_DEFINE_CLASS(aevalsrc);
102 
104  int expected_nb_channels)
105 {
106  EvalContext *eval = ctx->priv;
107  char *args1 = av_strdup(eval->exprs);
108  char *expr, *last_expr = NULL, *buf;
109  double (* const *func1)(void *, double) = NULL;
110  const char * const *func1_names = NULL;
111  int i, ret = 0;
112 
113  if (!args1)
114  return AVERROR(ENOMEM);
115 
116  if (!eval->exprs) {
117  av_log(ctx, AV_LOG_ERROR, "Channels expressions list is empty\n");
118  return AVERROR(EINVAL);
119  }
120 
121  if (!strcmp(ctx->filter->name, "aeval")) {
122  func1 = aeval_func1;
123  func1_names = aeval_func1_names;
124  }
125 
126 #define ADD_EXPRESSION(expr_) do { \
127  if (!av_dynarray2_add((void **)&eval->expr, &eval->nb_channels, \
128  sizeof(*eval->expr), NULL)) { \
129  ret = AVERROR(ENOMEM); \
130  goto end; \
131  } \
132  eval->expr[eval->nb_channels-1] = NULL; \
133  ret = av_expr_parse(&eval->expr[eval->nb_channels - 1], expr_, \
134  var_names, func1_names, func1, \
135  NULL, NULL, 0, ctx); \
136  if (ret < 0) \
137  goto end; \
138  } while (0)
139 
140  /* reset expressions */
141  for (i = 0; i < eval->nb_channels; i++) {
142  av_expr_free(eval->expr[i]);
143  eval->expr[i] = NULL;
144  }
145  av_freep(&eval->expr);
146  eval->nb_channels = 0;
147 
148  buf = args1;
149  while (expr = av_strtok(buf, "|", &buf)) {
150  ADD_EXPRESSION(expr);
151  last_expr = expr;
152  }
153 
154  if (expected_nb_channels > eval->nb_channels)
155  for (i = eval->nb_channels; i < expected_nb_channels; i++)
156  ADD_EXPRESSION(last_expr);
157 
158  if (expected_nb_channels > 0 && eval->nb_channels != expected_nb_channels) {
159  av_log(ctx, AV_LOG_ERROR,
160  "Mismatch between the specified number of channel expressions '%d' "
161  "and the number of expected output channels '%d' for the specified channel layout\n",
162  eval->nb_channels, expected_nb_channels);
163  ret = AVERROR(EINVAL);
164  goto end;
165  }
166 
167 end:
168  av_free(args1);
169  return ret;
170 }
171 
173 {
174  EvalContext *eval = ctx->priv;
175  int ret = 0;
176 
177  if (eval->chlayout_str) {
178  if (!strcmp(eval->chlayout_str, "same") && !strcmp(ctx->filter->name, "aeval")) {
179  eval->same_chlayout = 1;
180  } else {
181  ret = ff_parse_channel_layout(&eval->chlayout, NULL, eval->chlayout_str, ctx);
182  if (ret < 0)
183  return ret;
184 
186  if (ret < 0)
187  return ret;
188  }
189  } else {
190  /* guess channel layout from nb expressions/channels */
191  if ((ret = parse_channel_expressions(ctx, -1)) < 0)
192  return ret;
193 
195  if (!eval->chlayout && eval->nb_channels <= 0) {
196  av_log(ctx, AV_LOG_ERROR, "Invalid number of channels '%d' provided\n",
197  eval->nb_channels);
198  return AVERROR(EINVAL);
199  }
200  }
201 
202  if (eval->sample_rate_str)
203  if ((ret = ff_parse_sample_rate(&eval->sample_rate, eval->sample_rate_str, ctx)))
204  return ret;
205  eval->n = 0;
206 
207  return ret;
208 }
209 
211 {
212  EvalContext *eval = ctx->priv;
213  int i;
214 
215  for (i = 0; i < eval->nb_channels; i++) {
216  av_expr_free(eval->expr[i]);
217  eval->expr[i] = NULL;
218  }
219  av_freep(&eval->expr);
220  av_freep(&eval->channel_values);
221 }
222 
223 static int config_props(AVFilterLink *outlink)
224 {
225  EvalContext *eval = outlink->src->priv;
226  char buf[128];
227 
228  outlink->time_base = (AVRational){1, eval->sample_rate};
229  outlink->sample_rate = eval->sample_rate;
230 
231  eval->var_values[VAR_S] = eval->sample_rate;
233  eval->var_values[VAR_NB_OUT_CHANNELS] = outlink->channels;
234 
235  av_get_channel_layout_string(buf, sizeof(buf), 0, eval->chlayout);
236 
237  av_log(outlink->src, AV_LOG_VERBOSE,
238  "sample_rate:%d chlayout:%s duration:%"PRId64"\n",
239  eval->sample_rate, buf, eval->duration);
240 
241  return 0;
242 }
243 
245 {
246  EvalContext *eval = ctx->priv;
248  int64_t chlayouts[] = { eval->chlayout ? eval->chlayout : FF_COUNT2LAYOUT(eval->nb_channels) , -1 };
249  int sample_rates[] = { eval->sample_rate, -1 };
252  int ret;
253 
254  formats = ff_make_format_list(sample_fmts);
255  if (!formats)
256  return AVERROR(ENOMEM);
257  ret = ff_set_common_formats (ctx, formats);
258  if (ret < 0)
259  return ret;
260 
261  layouts = avfilter_make_format64_list(chlayouts);
262  if (!layouts)
263  return AVERROR(ENOMEM);
264  ret = ff_set_common_channel_layouts(ctx, layouts);
265  if (ret < 0)
266  return ret;
267 
268  formats = ff_make_format_list(sample_rates);
269  if (!formats)
270  return AVERROR(ENOMEM);
271  return ff_set_common_samplerates(ctx, formats);
272 }
273 
274 static int request_frame(AVFilterLink *outlink)
275 {
276  EvalContext *eval = outlink->src->priv;
277  AVFrame *samplesref;
278  int i, j;
279  int64_t t = av_rescale(eval->n, AV_TIME_BASE, eval->sample_rate);
280  int nb_samples;
281 
282  if (eval->duration >= 0 && t >= eval->duration)
283  return AVERROR_EOF;
284 
285  if (eval->duration >= 0) {
286  nb_samples = FFMIN(eval->nb_samples, av_rescale(eval->duration, eval->sample_rate, AV_TIME_BASE) - eval->pts);
287  if (!nb_samples)
288  return AVERROR_EOF;
289  } else {
290  nb_samples = eval->nb_samples;
291  }
292  samplesref = ff_get_audio_buffer(outlink, nb_samples);
293  if (!samplesref)
294  return AVERROR(ENOMEM);
295 
296  /* evaluate expression for each single sample and for each channel */
297  for (i = 0; i < nb_samples; i++, eval->n++) {
298  eval->var_values[VAR_N] = eval->n;
299  eval->var_values[VAR_T] = eval->var_values[VAR_N] * (double)1/eval->sample_rate;
300 
301  for (j = 0; j < eval->nb_channels; j++) {
302  *((double *) samplesref->extended_data[j] + i) =
303  av_expr_eval(eval->expr[j], eval->var_values, NULL);
304  }
305  }
306 
307  samplesref->pts = eval->pts;
308  samplesref->sample_rate = eval->sample_rate;
309  eval->pts += nb_samples;
310 
311  return ff_filter_frame(outlink, samplesref);
312 }
313 
314 #if CONFIG_AEVALSRC_FILTER
315 static const AVFilterPad aevalsrc_outputs[] = {
316  {
317  .name = "default",
318  .type = AVMEDIA_TYPE_AUDIO,
319  .config_props = config_props,
320  .request_frame = request_frame,
321  },
322  { NULL }
323 };
324 
326  .name = "aevalsrc",
327  .description = NULL_IF_CONFIG_SMALL("Generate an audio signal generated by an expression."),
328  .query_formats = query_formats,
329  .init = init,
330  .uninit = uninit,
331  .priv_size = sizeof(EvalContext),
332  .inputs = NULL,
333  .outputs = aevalsrc_outputs,
334  .priv_class = &aevalsrc_class,
335 };
336 
337 #endif /* CONFIG_AEVALSRC_FILTER */
338 
339 #define OFFSET(x) offsetof(EvalContext, x)
340 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
341 
342 static const AVOption aeval_options[]= {
343  { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
344  { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
345  { "c", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
346  { NULL }
347 };
348 
349 AVFILTER_DEFINE_CLASS(aeval);
350 
352 {
355  AVFilterLink *inlink = ctx->inputs[0];
356  AVFilterLink *outlink = ctx->outputs[0];
357  EvalContext *eval = ctx->priv;
358  static const enum AVSampleFormat sample_fmts[] = {
360  };
361  int ret;
362 
363  // inlink supports any channel layout
364  layouts = ff_all_channel_counts();
365  if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
366  return ret;
367 
368  if (eval->same_chlayout) {
369  layouts = ff_all_channel_counts();
370  if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
371  return ret;
372  } else {
373  // outlink supports only requested output channel layout
374  layouts = NULL;
375  if ((ret = ff_add_channel_layout(&layouts,
376  eval->out_channel_layout ? eval->out_channel_layout :
377  FF_COUNT2LAYOUT(eval->nb_channels))) < 0)
378  return ret;
379  if ((ret = ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts)) < 0)
380  return ret;
381  }
382 
383  formats = ff_make_format_list(sample_fmts);
384  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
385  return ret;
386 
387  formats = ff_all_samplerates();
388  return ff_set_common_samplerates(ctx, formats);
389 }
390 
391 static int aeval_config_output(AVFilterLink *outlink)
392 {
393  AVFilterContext *ctx = outlink->src;
394  EvalContext *eval = ctx->priv;
395  AVFilterLink *inlink = ctx->inputs[0];
396  int ret;
397 
398  if (eval->same_chlayout) {
399  eval->chlayout = inlink->channel_layout;
400 
401  if ((ret = parse_channel_expressions(ctx, inlink->channels)) < 0)
402  return ret;
403  }
404 
405  eval->n = 0;
406  eval->nb_in_channels = eval->var_values[VAR_NB_IN_CHANNELS] = inlink->channels;
407  eval->var_values[VAR_NB_OUT_CHANNELS] = outlink->channels;
408  eval->var_values[VAR_S] = inlink->sample_rate;
409  eval->var_values[VAR_T] = NAN;
410 
412  inlink->channels, sizeof(*eval->channel_values));
413  if (!eval->channel_values)
414  return AVERROR(ENOMEM);
415 
416  return 0;
417 }
418 
419 #define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))
420 
421 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
422 {
423  EvalContext *eval = inlink->dst->priv;
424  AVFilterLink *outlink = inlink->dst->outputs[0];
425  int nb_samples = in->nb_samples;
426  AVFrame *out;
427  double t0;
428  int i, j;
429 
430  out = ff_get_audio_buffer(outlink, nb_samples);
431  if (!out) {
432  av_frame_free(&in);
433  return AVERROR(ENOMEM);
434  }
435  av_frame_copy_props(out, in);
436 
437  t0 = TS2T(in->pts, inlink->time_base);
438 
439  /* evaluate expression for each single sample and for each channel */
440  for (i = 0; i < nb_samples; i++, eval->n++) {
441  eval->var_values[VAR_N] = eval->n;
442  eval->var_values[VAR_T] = t0 + i * (double)1/inlink->sample_rate;
443 
444  for (j = 0; j < inlink->channels; j++)
445  eval->channel_values[j] = *((double *) in->extended_data[j] + i);
446 
447  for (j = 0; j < outlink->channels; j++) {
448  eval->var_values[VAR_CH] = j;
449  *((double *) out->extended_data[j] + i) =
450  av_expr_eval(eval->expr[j], eval->var_values, eval);
451  }
452  }
453 
454  av_frame_free(&in);
455  return ff_filter_frame(outlink, out);
456 }
457 
458 #if CONFIG_AEVAL_FILTER
459 
460 static const AVFilterPad aeval_inputs[] = {
461  {
462  .name = "default",
463  .type = AVMEDIA_TYPE_AUDIO,
464  .filter_frame = filter_frame,
465  },
466  { NULL }
467 };
468 
469 static const AVFilterPad aeval_outputs[] = {
470  {
471  .name = "default",
472  .type = AVMEDIA_TYPE_AUDIO,
473  .config_props = aeval_config_output,
474  },
475  { NULL }
476 };
477 
479  .name = "aeval",
480  .description = NULL_IF_CONFIG_SMALL("Filter audio signal according to a specified expression."),
481  .query_formats = aeval_query_formats,
482  .init = init,
483  .uninit = uninit,
484  .priv_size = sizeof(EvalContext),
485  .inputs = aeval_inputs,
486  .outputs = aeval_outputs,
487  .priv_class = &aeval_class,
488 };
489 
490 #endif /* CONFIG_AEVAL_FILTER */
#define NULL
Definition: coverity.c:32
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:549
char * exprs
Definition: aeval.c:67
static const char *const func1_names[]
Definition: vf_rotate.c:195
static int aeval_config_output(AVFilterLink *outlink)
Definition: aeval.c:391
#define av_realloc_f(p, o, n)
This structure describes decoded (raw) audio or video data.
Definition: frame.h:268
static int aeval_query_formats(AVFilterContext *ctx)
Definition: aeval.c:351
AVOption.
Definition: opt.h:246
Definition: aeval.c:48
Main libavfilter public API header.
int64_t duration
Definition: aeval.c:69
AVExpr ** expr
Definition: aeval.c:66
static const char *const aeval_func1_names[]
Definition: aeval.c:83
static av_cold void uninit(AVFilterContext *ctx)
Definition: aeval.c:210
double, planar
Definition: samplefmt.h:70
double * channel_values
Definition: aeval.c:72
char * chlayout_str
Definition: aeval.c:61
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
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:435
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
int64_t out_channel_layout
Definition: aeval.c:73
#define av_cold
Definition: attributes.h:82
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int nb_samples
number of samples per requested frame
Definition: aeval.c:68
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:361
Definition: eval.c:157
int64_t duration
Definition: movenc.c:63
int64_t pts
Definition: aeval.c:65
#define t0
Definition: regdef.h:28
static double(*const aeval_func1[])(void *, double)
Definition: aeval.c:82
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
static const char *const var_names[]
Definition: aeval.c:36
static const AVOption aeval_options[]
Definition: aeval.c:342
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
#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
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:86
Definition: aeval.c:52
static double(*const func1[])(void *, double)
Definition: vf_rotate.c:189
#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:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
int ff_parse_channel_layout(int64_t *ret, int *nret, const char *arg, void *log_ctx)
Parse a channel layout or a corresponding integer representation.
Definition: formats.c:662
uint64_t n
Definition: aeval.c:70
simple assert() macros that are a bit more flexible than ISO C assert().
int64_t chlayout
Definition: aeval.c:60
var_name
Definition: aeval.c:46
audio channel layout utility functions
static int request_frame(AVFilterLink *outlink)
Definition: aeval.c:274
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 NAN
Definition: mathematics.h:64
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
#define FFMIN(a, b)
Definition: common.h:96
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: aeval.c:421
AVFormatContext * ctx
Definition: movenc.c:48
Definition: aeval.c:51
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
A list of supported channel layouts.
Definition: formats.h:85
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.
AVFilter ff_af_aeval
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
AVFilterChannelLayouts * avfilter_make_format64_list(const int64_t *fmts)
Definition: formats.c:303
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:334
int same_chlayout
set output as input channel layout
Definition: aeval.c:64
#define FLAGS
Definition: aeval.c:340
static int config_props(AVFilterLink *outlink)
Definition: aeval.c:223
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
char * sample_rate_str
Definition: aeval.c:58
void * buf
Definition: avisynth_c.h:690
Describe the class of an AVClass context structure.
Definition: log.h:67
int sample_rate
Sample rate of the audio data.
Definition: frame.h:440
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVFILTER_DEFINE_CLASS(aevalsrc)
const char * name
Filter name.
Definition: avfilter.h:148
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
int nb_in_channels
number of input channels
Definition: aeval.c:63
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
static const AVOption aevalsrc_options[]
Definition: aeval.c:88
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
sample_rates
int sample_rate
Definition: aeval.c:59
int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
Parse a sample rate.
Definition: formats.c:650
int nb_channels
number of output channels
Definition: aeval.c:62
#define av_free(p)
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:734
#define ADD_EXPRESSION(expr_)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
FILE * out
Definition: movenc.c:54
#define av_freep(p)
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:102
formats
Definition: signature.h:48
static av_cold int init(AVFilterContext *ctx)
Definition: aeval.c:172
static int parse_channel_expressions(AVFilterContext *ctx, int expected_nb_channels)
Definition: aeval.c:103
internal API functions
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:410
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:315
double var_values[VAR_VARS_NB]
Definition: aeval.c:71
static double val(void *priv, double ch)
Definition: aeval.c:76
Definition: aeval.c:47
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:334
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
for(j=16;j >0;--j)
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
AVFilter ff_asrc_aevalsrc
simple arithmetic expression evaluator
#define TS2T(ts, tb)
Definition: aeval.c:419
#define OFFSET(x)
Definition: aeval.c:339