FFmpeg
swresample.c
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1 /*
2  * Copyright (C) 2011-2012 Michael Niedermayer (michaelni@gmx.at)
3  * Copyright (c) 2002 Fabrice Bellard
4  *
5  * This file is part of libswresample
6  *
7  * libswresample is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * libswresample 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
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with libswresample; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/avassert.h"
24 #include "libavutil/common.h"
25 #include "libavutil/opt.h"
26 
28 
29 #undef time
30 #include <time.h>
31 #undef fprintf
32 
33 #define SAMPLES 1000
34 
35 #define SWR_CH_MAX 32
36 
37 #define ASSERT_LEVEL 2
38 
39 static double get(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f){
40  const uint8_t *p;
43  p= a[ch];
44  }else{
45  p= a[0];
46  index= ch + index*ch_count;
47  }
48 
49  switch(f){
50  case AV_SAMPLE_FMT_U8 : return ((const uint8_t*)p)[index]/127.0-1.0;
51  case AV_SAMPLE_FMT_S16: return ((const int16_t*)p)[index]/32767.0;
52  case AV_SAMPLE_FMT_S32: return ((const int32_t*)p)[index]/2147483647.0;
53  case AV_SAMPLE_FMT_FLT: return ((const float *)p)[index];
54  case AV_SAMPLE_FMT_DBL: return ((const double *)p)[index];
55  default: av_assert0(0);
56  }
57 }
58 
59 static void set(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f, double v){
60  uint8_t *p;
63  p= a[ch];
64  }else{
65  p= a[0];
66  index= ch + index*ch_count;
67  }
68  switch(f){
69  case AV_SAMPLE_FMT_U8 : ((uint8_t*)p)[index]= av_clip_uint8 (lrint((v+1.0)*127)); break;
70  case AV_SAMPLE_FMT_S16: ((int16_t*)p)[index]= av_clip_int16 (lrint(v*32767)); break;
71  case AV_SAMPLE_FMT_S32: ((int32_t*)p)[index]= av_clipl_int32(llrint(v*2147483647)); break;
72  case AV_SAMPLE_FMT_FLT: ((float *)p)[index]= v; break;
73  case AV_SAMPLE_FMT_DBL: ((double *)p)[index]= v; break;
74  default: av_assert2(0);
75  }
76 }
77 
78 static void shift(uint8_t *a[], int index, int ch_count, enum AVSampleFormat f){
79  int ch;
80 
83  for(ch= 0; ch<ch_count; ch++)
85  }else{
86  a[0] += index*ch_count*av_get_bytes_per_sample(f);
87  }
88 }
89 
90 static const enum AVSampleFormat formats[] = {
101 };
102 
103 static const int rates[] = {
104  8000,
105  11025,
106  16000,
107  22050,
108  32000,
109  48000,
110 };
111 
112 static const uint64_t layouts[]={
127 };
128 
129 static void setup_array(uint8_t *out[SWR_CH_MAX], uint8_t *in, enum AVSampleFormat format, int samples){
131  int i;
132  int plane_size= av_get_bytes_per_sample(format&0xFF)*samples;
133  format&=0xFF;
134  for(i=0; i<SWR_CH_MAX; i++){
135  out[i]= in + i*plane_size;
136  }
137  }else{
138  out[0]= in;
139  }
140 }
141 
142 static int cmp(const void *a, const void *b){
143  return *(const int *)a - *(const int *)b;
144 }
145 
146 static void audiogen(void *data, enum AVSampleFormat sample_fmt,
147  int channels, int sample_rate, int nb_samples)
148 {
149  int i, ch, k;
150  double v, f, a, ampa;
151  double tabf1[SWR_CH_MAX];
152  double tabf2[SWR_CH_MAX];
153  double taba[SWR_CH_MAX];
154  unsigned static rnd;
155 
156 #define PUT_SAMPLE set(data, ch, k, channels, sample_fmt, v);
157 #define uint_rand(x) ((x) = (x) * 1664525 + 1013904223)
158 #define dbl_rand(x) (uint_rand(x)*2.0 / (double)UINT_MAX - 1)
159  k = 0;
160 
161  /* 1 second of single freq sinus at 1000 Hz */
162  a = 0;
163  for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
164  v = sin(a) * 0.30;
165  for (ch = 0; ch < channels; ch++)
166  PUT_SAMPLE
167  a += M_PI * 1000.0 * 2.0 / sample_rate;
168  }
169 
170  /* 1 second of varying frequency between 100 and 10000 Hz */
171  a = 0;
172  for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
173  v = sin(a) * 0.30;
174  for (ch = 0; ch < channels; ch++)
175  PUT_SAMPLE
176  f = 100.0 + (((10000.0 - 100.0) * i) / sample_rate);
177  a += M_PI * f * 2.0 / sample_rate;
178  }
179 
180  /* 0.5 second of low amplitude white noise */
181  for (i = 0; i < sample_rate / 2 && k < nb_samples; i++, k++) {
182  v = dbl_rand(rnd) * 0.30;
183  for (ch = 0; ch < channels; ch++)
184  PUT_SAMPLE
185  }
186 
187  /* 0.5 second of high amplitude white noise */
188  for (i = 0; i < sample_rate / 2 && k < nb_samples; i++, k++) {
189  v = dbl_rand(rnd);
190  for (ch = 0; ch < channels; ch++)
191  PUT_SAMPLE
192  }
193 
194  /* 1 second of unrelated ramps for each channel */
195  for (ch = 0; ch < channels; ch++) {
196  taba[ch] = 0;
197  tabf1[ch] = 100 + uint_rand(rnd) % 5000;
198  tabf2[ch] = 100 + uint_rand(rnd) % 5000;
199  }
200  for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
201  for (ch = 0; ch < channels; ch++) {
202  v = sin(taba[ch]) * 0.30;
203  PUT_SAMPLE
204  f = tabf1[ch] + (((tabf2[ch] - tabf1[ch]) * i) / sample_rate);
205  taba[ch] += M_PI * f * 2.0 / sample_rate;
206  }
207  }
208 
209  /* 2 seconds of 500 Hz with varying volume */
210  a = 0;
211  ampa = 0;
212  for (i = 0; i < 2 * sample_rate && k < nb_samples; i++, k++) {
213  for (ch = 0; ch < channels; ch++) {
214  double amp = (1.0 + sin(ampa)) * 0.15;
215  if (ch & 1)
216  amp = 0.30 - amp;
217  v = sin(a) * amp;
218  PUT_SAMPLE
219  a += M_PI * 500.0 * 2.0 / sample_rate;
220  ampa += M_PI * 2.0 / sample_rate;
221  }
222  }
223 }
224 
225 int main(int argc, char **argv){
226  int in_sample_rate, out_sample_rate, ch ,i, flush_count;
227  uint64_t in_ch_layout, out_ch_layout;
229  uint8_t array_in[SAMPLES*8*8];
230  uint8_t array_mid[SAMPLES*8*8*3];
231  uint8_t array_out[SAMPLES*8*8+100];
232  uint8_t *ain[SWR_CH_MAX];
233  uint8_t *aout[SWR_CH_MAX];
234  uint8_t *amid[SWR_CH_MAX];
235  int flush_i=0;
236  int mode;
237  int num_tests = 10000;
238  uint32_t seed = 0;
239  uint32_t rand_seed = 0;
241  int max_tests = FF_ARRAY_ELEMS(remaining_tests);
242  int test;
243  int specific_test= -1;
244 
245  struct SwrContext * forw_ctx= NULL;
246  struct SwrContext *backw_ctx= NULL;
247 
248  if (argc > 1) {
249  if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
250  av_log(NULL, AV_LOG_INFO, "Usage: swresample-test [<num_tests>[ <test>]] \n"
251  "num_tests Default is %d\n", num_tests);
252  return 0;
253  }
254  num_tests = strtol(argv[1], NULL, 0);
255  if(num_tests < 0) {
256  num_tests = -num_tests;
257  rand_seed = time(0);
258  }
259  if(num_tests<= 0 || num_tests>max_tests)
260  num_tests = max_tests;
261  if(argc > 2) {
262  specific_test = strtol(argv[1], NULL, 0);
263  }
264  }
265 
266  for(i=0; i<max_tests; i++)
267  remaining_tests[i] = i;
268 
269  for(test=0; test<num_tests; test++){
270  unsigned r;
271  uint_rand(seed);
272  r = (seed * (uint64_t)(max_tests - test)) >>32;
273  FFSWAP(int, remaining_tests[r], remaining_tests[max_tests - test - 1]);
274  }
275  qsort(remaining_tests + max_tests - num_tests, num_tests, sizeof(remaining_tests[0]), cmp);
276  in_sample_rate=16000;
277  for(test=0; test<num_tests; test++){
278  char in_layout_string[256];
279  char out_layout_string[256];
280  unsigned vector= remaining_tests[max_tests - test - 1];
281  int in_ch_count;
282  int out_count, mid_count, out_ch_count;
283 
288  out_sample_rate = rates [vector % FF_ARRAY_ELEMS(rates )]; vector /= FF_ARRAY_ELEMS(rates);
289  av_assert0(!vector);
290 
291  if(specific_test == 0){
293  continue;
294  }
295 
298  av_get_channel_layout_string( in_layout_string, sizeof( in_layout_string), in_ch_count, in_ch_layout);
299  av_get_channel_layout_string(out_layout_string, sizeof(out_layout_string), out_ch_count, out_ch_layout);
300  fprintf(stderr, "TEST: %s->%s, rate:%5d->%5d, fmt:%s->%s\n",
301  in_layout_string, out_layout_string,
306  0, 0);
309  0, 0);
310  if(!forw_ctx) {
311  fprintf(stderr, "Failed to init forw_cts\n");
312  return 1;
313  }
314  if(!backw_ctx) {
315  fprintf(stderr, "Failed to init backw_ctx\n");
316  return 1;
317  }
318  if (uint_rand(rand_seed) % 3 == 0)
319  av_opt_set_int(forw_ctx, "ich", 0, 0);
320  if (uint_rand(rand_seed) % 3 == 0)
321  av_opt_set_int(forw_ctx, "och", 0, 0);
322 
323  if(swr_init( forw_ctx) < 0)
324  fprintf(stderr, "swr_init(->) failed\n");
325  if(swr_init(backw_ctx) < 0)
326  fprintf(stderr, "swr_init(<-) failed\n");
327  //FIXME test planar
328  setup_array(ain , array_in , in_sample_fmt, SAMPLES);
329  setup_array(amid, array_mid, out_sample_fmt, 3*SAMPLES);
330  setup_array(aout, array_out, in_sample_fmt , SAMPLES);
331 #if 0
332  for(ch=0; ch<in_ch_count; ch++){
333  for(i=0; i<SAMPLES; i++)
334  set(ain, ch, i, in_ch_count, in_sample_fmt, sin(i*i*3/SAMPLES));
335  }
336 #else
337  audiogen(ain, in_sample_fmt, in_ch_count, SAMPLES/6+1, SAMPLES);
338 #endif
339  mode = uint_rand(rand_seed) % 3;
340  if(mode==0 /*|| out_sample_rate == in_sample_rate*/) {
341  mid_count= swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, SAMPLES);
342  } else if(mode==1){
343  mid_count= swr_convert(forw_ctx, amid, 0, (const uint8_t **)ain, SAMPLES);
344  mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, 0);
345  } else {
346  int tmp_count;
347  mid_count= swr_convert(forw_ctx, amid, 0, (const uint8_t **)ain, 1);
348  av_assert0(mid_count==0);
349  shift(ain, 1, in_ch_count, in_sample_fmt);
350  mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, 0);
351  shift(amid, mid_count, out_ch_count, out_sample_fmt); tmp_count = mid_count;
352  mid_count+=swr_convert(forw_ctx, amid, 2, (const uint8_t **)ain, 2);
353  shift(amid, mid_count-tmp_count, out_ch_count, out_sample_fmt); tmp_count = mid_count;
354  shift(ain, 2, in_ch_count, in_sample_fmt);
355  mid_count+=swr_convert(forw_ctx, amid, 1, (const uint8_t **)ain, SAMPLES-3);
356  shift(amid, mid_count-tmp_count, out_ch_count, out_sample_fmt); tmp_count = mid_count;
357  shift(ain, -3, in_ch_count, in_sample_fmt);
358  mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, 0);
359  shift(amid, -tmp_count, out_ch_count, out_sample_fmt);
360  }
361  out_count= swr_convert(backw_ctx,aout, SAMPLES, (const uint8_t **)amid, mid_count);
362 
363  for(ch=0; ch<in_ch_count; ch++){
364  double sse, maxdiff=0;
365  double sum_a= 0;
366  double sum_b= 0;
367  double sum_aa= 0;
368  double sum_bb= 0;
369  double sum_ab= 0;
370  for(i=0; i<out_count; i++){
371  double a= get(ain , ch, i, in_ch_count, in_sample_fmt);
372  double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
373  sum_a += a;
374  sum_b += b;
375  sum_aa+= a*a;
376  sum_bb+= b*b;
377  sum_ab+= a*b;
378  maxdiff= FFMAX(maxdiff, fabs(a-b));
379  }
380  sse= sum_aa + sum_bb - 2*sum_ab;
381  if(sse < 0 && sse > -0.00001) sse=0; //fix rounding error
382 
383  fprintf(stderr, "[e:%f c:%f max:%f] len:%5d\n", out_count ? sqrt(sse/out_count) : 0, sum_ab/(sqrt(sum_aa*sum_bb)), maxdiff, out_count);
384  }
385 
386  flush_i++;
387  flush_i%=21;
388  flush_count = swr_convert(backw_ctx,aout, flush_i, 0, 0);
389  shift(aout, flush_i, in_ch_count, in_sample_fmt);
390  flush_count+= swr_convert(backw_ctx,aout, SAMPLES-flush_i, 0, 0);
391  shift(aout, -flush_i, in_ch_count, in_sample_fmt);
392  if(flush_count){
393  for(ch=0; ch<in_ch_count; ch++){
394  double sse, maxdiff=0;
395  double sum_a= 0;
396  double sum_b= 0;
397  double sum_aa= 0;
398  double sum_bb= 0;
399  double sum_ab= 0;
400  for(i=0; i<flush_count; i++){
401  double a= get(ain , ch, i+out_count, in_ch_count, in_sample_fmt);
402  double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
403  sum_a += a;
404  sum_b += b;
405  sum_aa+= a*a;
406  sum_bb+= b*b;
407  sum_ab+= a*b;
408  maxdiff= FFMAX(maxdiff, fabs(a-b));
409  }
410  sse= sum_aa + sum_bb - 2*sum_ab;
411  if(sse < 0 && sse > -0.00001) sse=0; //fix rounding error
412 
413  fprintf(stderr, "[e:%f c:%f max:%f] len:%5d F:%3d\n", sqrt(sse/flush_count), sum_ab/(sqrt(sum_aa*sum_bb)), maxdiff, flush_count, flush_i);
414  }
415  }
416 
417 
418  fprintf(stderr, "\n");
419  }
420 
421  return 0;
422 }
sum_a
static void sum_a(const int *input, int *output, int len)
Definition: dcadct.c:26
AV_CH_LAYOUT_7POINT0
#define AV_CH_LAYOUT_7POINT0
Definition: channel_layout.h:110
formats
formats
Definition: signature.h:48
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
AV_CH_LAYOUT_5POINT0_BACK
#define AV_CH_LAYOUT_5POINT0_BACK
Definition: channel_layout.h:102
r
const char * r
Definition: vf_curves.c:116
opt.h
SwrContext::out_ch_layout
int64_t out_ch_layout
output channel layout
Definition: swresample_internal.h:103
out
FILE * out
Definition: movenc.c:54
SwrContext::in_sample_rate
int in_sample_rate
input sample rate
Definition: swresample_internal.h:104
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:108
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
av_get_channel_layout_string
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.
Definition: channel_layout.c:217
index
fg index
Definition: ffmpeg_filter.c:168
SwrContext::out_sample_rate
int out_sample_rate
output sample rate
Definition: swresample_internal.h:105
b
#define b
Definition: input.c:41
AV_SAMPLE_FMT_S32P
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:68
data
const char data[16]
Definition: mxf.c:142
cmp
static int cmp(const void *a, const void *b)
Definition: swresample.c:142
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
audiogen
static void audiogen(void *data, enum AVSampleFormat sample_fmt, int channels, int sample_rate, int nb_samples)
Definition: swresample.c:146
setup_array
static void setup_array(uint8_t *out[SWR_CH_MAX], uint8_t *in, enum AVSampleFormat format, int samples)
Definition: swresample.c:129
SwrContext::out_sample_fmt
enum AVSampleFormat out_sample_fmt
output sample format
Definition: swresample_internal.h:101
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
AV_CH_LAYOUT_QUAD
#define AV_CH_LAYOUT_QUAD
Definition: channel_layout.h:99
SAMPLES
#define SAMPLES
Definition: swresample.c:33
avassert.h
lrint
#define lrint
Definition: tablegen.h:53
rnd
#define rnd()
Definition: checkasm.h:118
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
set
static void set(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f, double v)
Definition: swresample.c:59
swr_init
av_cold int swr_init(struct SwrContext *s)
Initialize context after user parameters have been set.
Definition: swresample.c:152
sse
static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, int stride)
Definition: mpegvideo_enc.c:2558
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
av_sample_fmt_is_planar
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
swr_convert
int attribute_align_arg swr_convert(struct SwrContext *s, uint8_t *out_arg[SWR_CH_MAX], int out_count, const uint8_t *in_arg[SWR_CH_MAX], int in_count)
Definition: swresample.c:714
channels
channels
Definition: aptx.h:33
sum_b
static void sum_b(const int *input, int *output, int len)
Definition: dcadct.c:34
av_get_sample_fmt_name
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
SwrContext
The libswresample context.
Definition: swresample_internal.h:95
swr_alloc_set_opts
struct SwrContext * swr_alloc_set_opts(struct SwrContext *s, int64_t out_ch_layout, enum AVSampleFormat out_sample_fmt, int out_sample_rate, int64_t in_ch_layout, enum AVSampleFormat in_sample_fmt, int in_sample_rate, int log_offset, void *log_ctx)
Allocate SwrContext if needed and set/reset common parameters.
Definition: swresample.c:59
f
#define f(width, name)
Definition: cbs_vp9.c:255
AV_CH_LAYOUT_2_1
#define AV_CH_LAYOUT_2_1
Definition: channel_layout.h:93
fabs
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
av_clip_int16
#define av_clip_int16
Definition: common.h:137
NULL
#define NULL
Definition: coverity.c:32
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition: channel_layout.h:101
time.h
seed
static unsigned int seed
Definition: videogen.c:78
swresample.h
av_get_channel_layout_nb_channels
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
Definition: channel_layout.c:226
uint_rand
#define uint_rand(x)
av_opt_set_int
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:586
dbl_rand
#define dbl_rand(x)
main
int main(int argc, char **argv)
Definition: swresample.c:225
get
static double get(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f)
Definition: swresample.c:39
AV_SAMPLE_FMT_U8P
@ AV_SAMPLE_FMT_U8P
unsigned 8 bits, planar
Definition: samplefmt.h:66
av_clipl_int32
#define av_clipl_int32
Definition: common.h:140
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
layouts
static const uint64_t layouts[]
Definition: swresample.c:112
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
AV_CH_LAYOUT_5POINT1_BACK
#define AV_CH_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:103
M_PI
#define M_PI
Definition: mathematics.h:52
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:192
AV_CH_LAYOUT_5POINT0
#define AV_CH_LAYOUT_5POINT0
Definition: channel_layout.h:100
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
i
int i
Definition: input.c:407
av_get_bytes_per_sample
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
AV_SAMPLE_FMT_U8
@ AV_SAMPLE_FMT_U8
unsigned 8 bits
Definition: samplefmt.h:60
common.h
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_7POINT1
Definition: channel_layout.h:112
AV_CH_LAYOUT_7POINT1_WIDE
#define AV_CH_LAYOUT_7POINT1_WIDE
Definition: channel_layout.h:113
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
SwrContext::in_sample_fmt
enum AVSampleFormat in_sample_fmt
input sample format
Definition: swresample_internal.h:99
AV_CH_LAYOUT_SURROUND
#define AV_CH_LAYOUT_SURROUND
Definition: channel_layout.h:94
channel_layout.h
rates
static const int rates[]
Definition: swresample.c:103
mode
mode
Definition: ebur128.h:83
shift
static void shift(uint8_t *a[], int index, int ch_count, enum AVSampleFormat f)
Definition: swresample.c:78
test
static void test(const char *pattern, const char *host)
Definition: noproxy.c:23
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:70
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
av_clip_uint8
#define av_clip_uint8
Definition: common.h:128
av_get_alt_sample_fmt
enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar)
Return the planar<->packed alternative form of the given sample format, or AV_SAMPLE_FMT_NONE on erro...
Definition: samplefmt.c:66
llrint
#define llrint(x)
Definition: libm.h:394
SwrContext::in_ch_layout
int64_t in_ch_layout
input channel layout
Definition: swresample_internal.h:102
SwrContext::in
AudioData in
input audio data
Definition: swresample_internal.h:148
format
fg outputs[0] format
Definition: ffmpeg_filter.c:175
AV_CH_LAYOUT_4POINT0
#define AV_CH_LAYOUT_4POINT0
Definition: channel_layout.h:96
int32_t
int32_t
Definition: audioconvert.c:56
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
SWR_CH_MAX
#define SWR_CH_MAX
Definition: swresample.c:35
AV_SAMPLE_FMT_DBL
@ AV_SAMPLE_FMT_DBL
double
Definition: samplefmt.h:64
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:62
AV_CH_LAYOUT_2_2
#define AV_CH_LAYOUT_2_2
Definition: channel_layout.h:98
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:63
PUT_SAMPLE
#define PUT_SAMPLE