FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
af_channelmap.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2012 Google, Inc.
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 channel mapping filter
24  */
25 
26 #include <ctype.h>
27 
28 #include "libavutil/avstring.h"
30 #include "libavutil/common.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/samplefmt.h"
34 
35 #include "audio.h"
36 #include "avfilter.h"
37 #include "formats.h"
38 #include "internal.h"
39 
40 struct ChannelMap {
41  uint64_t in_channel;
42  uint64_t out_channel;
45 };
46 
55 };
56 
57 #define MAX_CH 64
58 typedef struct ChannelMapContext {
59  const AVClass *class;
60  char *mapping_str;
62  uint64_t output_layout;
64  int nch;
67 
68 #define OFFSET(x) offsetof(ChannelMapContext, x)
69 #define A AV_OPT_FLAG_AUDIO_PARAM
70 #define F AV_OPT_FLAG_FILTERING_PARAM
71 static const AVOption channelmap_options[] = {
72  { "map", "A comma-separated list of input channel numbers in output order.",
73  OFFSET(mapping_str), AV_OPT_TYPE_STRING, .flags = A|F },
74  { "channel_layout", "Output channel layout.",
75  OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A|F },
76  { NULL }
77 };
78 
79 AVFILTER_DEFINE_CLASS(channelmap);
80 
81 static char* split(char *message, char delim) {
82  char *next = strchr(message, delim);
83  if (next)
84  *next++ = '\0';
85  return next;
86 }
87 
88 static int get_channel_idx(char **map, int *ch, char delim, int max_ch)
89 {
90  char *next;
91  int len;
92  int n = 0;
93  if (!*map)
94  return AVERROR(EINVAL);
95  next = split(*map, delim);
96  if (!next && delim == '-')
97  return AVERROR(EINVAL);
98  len = strlen(*map);
99  sscanf(*map, "%d%n", ch, &n);
100  if (n != len)
101  return AVERROR(EINVAL);
102  if (*ch < 0 || *ch > max_ch)
103  return AVERROR(EINVAL);
104  *map = next;
105  return 0;
106 }
107 
108 static int get_channel(char **map, uint64_t *ch, char delim)
109 {
110  char *next = split(*map, delim);
111  if (!next && delim == '-')
112  return AVERROR(EINVAL);
113  *ch = av_get_channel_layout(*map);
114  if (av_get_channel_layout_nb_channels(*ch) != 1)
115  return AVERROR(EINVAL);
116  *map = next;
117  return 0;
118 }
119 
121 {
122  ChannelMapContext *s = ctx->priv;
123  char *mapping, separator = '|';
124  int map_entries = 0;
125  char buf[256];
126  enum MappingMode mode;
127  uint64_t out_ch_mask = 0;
128  int i;
129 
130  mapping = s->mapping_str;
131 
132  if (!mapping) {
133  mode = MAP_NONE;
134  } else {
135  char *dash = strchr(mapping, '-');
136  if (!dash) { // short mapping
137  if (av_isdigit(*mapping))
138  mode = MAP_ONE_INT;
139  else
140  mode = MAP_ONE_STR;
141  } else if (av_isdigit(*mapping)) {
142  if (av_isdigit(*(dash+1)))
143  mode = MAP_PAIR_INT_INT;
144  else
145  mode = MAP_PAIR_INT_STR;
146  } else {
147  if (av_isdigit(*(dash+1)))
148  mode = MAP_PAIR_STR_INT;
149  else
150  mode = MAP_PAIR_STR_STR;
151  }
152  }
153 
154  if (mode != MAP_NONE) {
155  char *sep = mapping;
156  map_entries = 1;
157  while ((sep = strchr(sep, separator))) {
158  if (*++sep) // Allow trailing comma
159  map_entries++;
160  }
161  }
162 
163  if (map_entries > MAX_CH) {
164  av_log(ctx, AV_LOG_ERROR, "Too many channels mapped: '%d'.\n", map_entries);
165  return AVERROR(EINVAL);
166  }
167 
168  for (i = 0; i < map_entries; i++) {
169  int in_ch_idx = -1, out_ch_idx = -1;
170  uint64_t in_ch = 0, out_ch = 0;
171  static const char err[] = "Failed to parse channel map\n";
172  switch (mode) {
173  case MAP_ONE_INT:
174  if (get_channel_idx(&mapping, &in_ch_idx, separator, MAX_CH) < 0) {
175  av_log(ctx, AV_LOG_ERROR, err);
176  return AVERROR(EINVAL);
177  }
178  s->map[i].in_channel_idx = in_ch_idx;
179  s->map[i].out_channel_idx = i;
180  break;
181  case MAP_ONE_STR:
182  if (get_channel(&mapping, &in_ch, separator) < 0) {
183  av_log(ctx, AV_LOG_ERROR, err);
184  return AVERROR(EINVAL);
185  }
186  s->map[i].in_channel = in_ch;
187  s->map[i].out_channel_idx = i;
188  break;
189  case MAP_PAIR_INT_INT:
190  if (get_channel_idx(&mapping, &in_ch_idx, '-', MAX_CH) < 0 ||
191  get_channel_idx(&mapping, &out_ch_idx, separator, MAX_CH) < 0) {
192  av_log(ctx, AV_LOG_ERROR, err);
193  return AVERROR(EINVAL);
194  }
195  s->map[i].in_channel_idx = in_ch_idx;
196  s->map[i].out_channel_idx = out_ch_idx;
197  break;
198  case MAP_PAIR_INT_STR:
199  if (get_channel_idx(&mapping, &in_ch_idx, '-', MAX_CH) < 0 ||
200  get_channel(&mapping, &out_ch, separator) < 0 ||
201  out_ch & out_ch_mask) {
202  av_log(ctx, AV_LOG_ERROR, err);
203  return AVERROR(EINVAL);
204  }
205  s->map[i].in_channel_idx = in_ch_idx;
206  s->map[i].out_channel = out_ch;
207  out_ch_mask |= out_ch;
208  break;
209  case MAP_PAIR_STR_INT:
210  if (get_channel(&mapping, &in_ch, '-') < 0 ||
211  get_channel_idx(&mapping, &out_ch_idx, separator, MAX_CH) < 0) {
212  av_log(ctx, AV_LOG_ERROR, err);
213  return AVERROR(EINVAL);
214  }
215  s->map[i].in_channel = in_ch;
216  s->map[i].out_channel_idx = out_ch_idx;
217  break;
218  case MAP_PAIR_STR_STR:
219  if (get_channel(&mapping, &in_ch, '-') < 0 ||
220  get_channel(&mapping, &out_ch, separator) < 0 ||
221  out_ch & out_ch_mask) {
222  av_log(ctx, AV_LOG_ERROR, err);
223  return AVERROR(EINVAL);
224  }
225  s->map[i].in_channel = in_ch;
226  s->map[i].out_channel = out_ch;
227  out_ch_mask |= out_ch;
228  break;
229  }
230  }
231  s->mode = mode;
232  s->nch = map_entries;
233  s->output_layout = out_ch_mask ? out_ch_mask :
234  av_get_default_channel_layout(map_entries);
235 
236  if (s->channel_layout_str) {
237  uint64_t fmt;
238  if ((fmt = av_get_channel_layout(s->channel_layout_str)) == 0) {
239  av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout: '%s'.\n",
240  s->channel_layout_str);
241  return AVERROR(EINVAL);
242  }
243  if (mode == MAP_NONE) {
244  int i;
246  for (i = 0; i < s->nch; i++) {
247  s->map[i].in_channel_idx = i;
248  s->map[i].out_channel_idx = i;
249  }
250  } else if (out_ch_mask && out_ch_mask != fmt) {
251  av_get_channel_layout_string(buf, sizeof(buf), 0, out_ch_mask);
252  av_log(ctx, AV_LOG_ERROR,
253  "Output channel layout '%s' does not match the list of channel mapped: '%s'.\n",
254  s->channel_layout_str, buf);
255  return AVERROR(EINVAL);
256  } else if (s->nch != av_get_channel_layout_nb_channels(fmt)) {
257  av_log(ctx, AV_LOG_ERROR,
258  "Output channel layout %s does not match the number of channels mapped %d.\n",
259  s->channel_layout_str, s->nch);
260  return AVERROR(EINVAL);
261  }
262  s->output_layout = fmt;
263  }
264  if (!s->output_layout) {
265  av_log(ctx, AV_LOG_ERROR, "Output channel layout is not set and "
266  "cannot be guessed from the maps.\n");
267  return AVERROR(EINVAL);
268  }
269 
270  if (mode == MAP_PAIR_INT_STR || mode == MAP_PAIR_STR_STR) {
271  for (i = 0; i < s->nch; i++) {
273  s->output_layout, s->map[i].out_channel);
274  }
275  }
276 
277  return 0;
278 }
279 
281 {
282  ChannelMapContext *s = ctx->priv;
285  int ret;
286 
287  layouts = ff_all_channel_counts();
288  if (!layouts) {
289  ret = AVERROR(ENOMEM);
290  goto fail;
291  }
292  if ((ret = ff_add_channel_layout (&channel_layouts, s->output_layout )) < 0 ||
293  (ret = ff_set_common_formats (ctx , ff_planar_sample_fmts() )) < 0 ||
294  (ret = ff_set_common_samplerates (ctx , ff_all_samplerates() )) < 0 ||
295  (ret = ff_channel_layouts_ref (layouts , &ctx->inputs[0]->out_channel_layouts)) < 0 ||
296  (ret = ff_channel_layouts_ref (channel_layouts , &ctx->outputs[0]->in_channel_layouts)) < 0)
297  goto fail;
298 
299  return 0;
300 fail:
301  if (layouts)
302  av_freep(&layouts->channel_layouts);
303  av_freep(&layouts);
304  return ret;
305 }
306 
308 {
309  AVFilterContext *ctx = inlink->dst;
310  AVFilterLink *outlink = ctx->outputs[0];
311  const ChannelMapContext *s = ctx->priv;
312  const int nch_in = inlink->channels;
313  const int nch_out = s->nch;
314  int ch;
315  uint8_t *source_planes[MAX_CH];
316 
317  memcpy(source_planes, buf->extended_data,
318  nch_in * sizeof(source_planes[0]));
319 
320  if (nch_out > nch_in) {
321  if (nch_out > FF_ARRAY_ELEMS(buf->data)) {
322  uint8_t **new_extended_data =
323  av_mallocz_array(nch_out, sizeof(*buf->extended_data));
324  if (!new_extended_data) {
325  av_frame_free(&buf);
326  return AVERROR(ENOMEM);
327  }
328  if (buf->extended_data == buf->data) {
329  buf->extended_data = new_extended_data;
330  } else {
331  av_free(buf->extended_data);
332  buf->extended_data = new_extended_data;
333  }
334  } else if (buf->extended_data != buf->data) {
335  av_free(buf->extended_data);
336  buf->extended_data = buf->data;
337  }
338  }
339 
340  for (ch = 0; ch < nch_out; ch++) {
341  buf->extended_data[s->map[ch].out_channel_idx] =
342  source_planes[s->map[ch].in_channel_idx];
343  }
344 
345  if (buf->data != buf->extended_data)
346  memcpy(buf->data, buf->extended_data,
347  FFMIN(FF_ARRAY_ELEMS(buf->data), nch_out) * sizeof(buf->data[0]));
348 
349  buf->channel_layout = outlink->channel_layout;
350  buf->channels = outlink->channels;
351 
352  return ff_filter_frame(outlink, buf);
353 }
354 
356 {
357  AVFilterContext *ctx = inlink->dst;
358  ChannelMapContext *s = ctx->priv;
359  int nb_channels = inlink->channels;
360  int i, err = 0;
361  const char *channel_name;
362  char layout_name[256];
363 
364  for (i = 0; i < s->nch; i++) {
365  struct ChannelMap *m = &s->map[i];
366 
367  if (s->mode == MAP_PAIR_STR_INT || s->mode == MAP_PAIR_STR_STR) {
369  inlink->channel_layout, m->in_channel);
370  }
371 
372  if (m->in_channel_idx < 0 || m->in_channel_idx >= nb_channels) {
373  av_get_channel_layout_string(layout_name, sizeof(layout_name),
374  nb_channels, inlink->channel_layout);
375  if (m->in_channel) {
376  channel_name = av_get_channel_name(m->in_channel);
377  av_log(ctx, AV_LOG_ERROR,
378  "input channel '%s' not available from input layout '%s'\n",
379  channel_name, layout_name);
380  } else {
381  av_log(ctx, AV_LOG_ERROR,
382  "input channel #%d not available from input layout '%s'\n",
383  m->in_channel_idx, layout_name);
384  }
385  err = AVERROR(EINVAL);
386  }
387  }
388 
389  return err;
390 }
391 
393  {
394  .name = "default",
395  .type = AVMEDIA_TYPE_AUDIO,
396  .filter_frame = channelmap_filter_frame,
397  .config_props = channelmap_config_input,
398  .needs_writable = 1,
399  },
400  { NULL }
401 };
402 
404  {
405  .name = "default",
406  .type = AVMEDIA_TYPE_AUDIO
407  },
408  { NULL }
409 };
410 
412  .name = "channelmap",
413  .description = NULL_IF_CONFIG_SMALL("Remap audio channels."),
414  .init = channelmap_init,
415  .query_formats = channelmap_query_formats,
416  .priv_size = sizeof(ChannelMapContext),
417  .priv_class = &channelmap_class,
418  .inputs = avfilter_af_channelmap_inputs,
419  .outputs = avfilter_af_channelmap_outputs,
420 };
#define NULL
Definition: coverity.c:32
AVFILTER_DEFINE_CLASS(channelmap)
const char * s
Definition: avisynth_c.h:768
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:206
uint64_t in_channel
layout describing the input channel
Definition: af_channelmap.c:41
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
AVOption.
Definition: opt.h:246
const char * fmt
Definition: avisynth_c.h:769
#define OFFSET(x)
Definition: af_channelmap.c:68
Main libavfilter public API header.
AVFilter ff_af_channelmap
uint64_t output_layout
Definition: af_channelmap.c:62
static const AVOption channelmap_options[]
Definition: af_channelmap.c:71
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
uint64_t av_get_channel_layout(const char *name)
Return a channel layout id that matches name, or 0 if no match is found.
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:1113
uint8_t
#define av_cold
Definition: attributes.h:82
AVOptions.
enum MappingMode mode
Definition: af_channelmap.c:65
static int channelmap_filter_frame(AVFilterLink *inlink, AVFrame *buf)
char * channel_layout_str
Definition: af_channelmap.c:61
static int channelmap_query_formats(AVFilterContext *ctx)
#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
#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:163
#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
uint64_t * channel_layouts
list of channel layouts
Definition: formats.h:86
#define fail()
Definition: checkasm.h:109
#define A
Definition: af_channelmap.c:69
static char * split(char *message, char delim)
Definition: af_channelmap.c:81
MappingMode
Definition: af_channelmap.c:47
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:379
int channels
number of audio channels, only used for audio.
Definition: frame.h:506
audio channel layout utility functions
#define FFMIN(a, b)
Definition: common.h:96
AVFormatContext * ctx
Definition: movenc.c:48
int n
Definition: avisynth_c.h:684
AVFilterFormats * ff_planar_sample_fmts(void)
Construct a formats list containing all planar sample formats.
Definition: formats.c:382
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define FF_ARRAY_ELEMS(a)
int in_channel_idx
index of in_channel in the input stream data
Definition: af_channelmap.c:43
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.
void * buf
Definition: avisynth_c.h:690
struct ChannelMap map[MAX_CH]
Definition: af_channelmap.c:63
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
uint64_t out_channel
layout describing the output channel
Definition: af_channelmap.c:42
const char * name
Filter name.
Definition: avfilter.h:148
const VDPAUPixFmtMap * map
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
int av_get_channel_layout_channel_index(uint64_t channel_layout, uint64_t channel)
Get the index of a channel in channel_layout.
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
static int channelmap_config_input(AVFilterLink *inlink)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
static const AVFilterPad avfilter_af_channelmap_inputs[]
static int get_channel_idx(char **map, int *ch, char delim, int max_ch)
Definition: af_channelmap.c:88
#define MAX_CH
Definition: af_channelmap.c:57
common internal and external API header
#define F
Definition: af_channelmap.c:70
#define av_free(p)
const char * av_get_channel_name(uint64_t channel)
Get the name of a given channel.
int len
static int get_channel(char **map, uint64_t *ch, char delim)
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.
#define av_freep(p)
static av_cold int channelmap_init(AVFilterContext *ctx)
static const AVFilterPad avfilter_af_channelmap_outputs[]
int nb_channels
int out_channel_idx
Definition: af_channelmap.c:44
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:248
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
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
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191