FFmpeg  4.3.7
framesync.c
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1 /*
2  * Copyright (c) 2013 Nicolas George
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 License
8  * 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
14  * GNU Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public License
17  * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/avassert.h"
22 #include "libavutil/opt.h"
23 #include "avfilter.h"
24 #include "filters.h"
25 #include "framesync.h"
26 #include "internal.h"
27 
28 #define OFFSET(member) offsetof(FFFrameSync, member)
29 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
30 
31 static const char *framesync_name(void *ptr)
32 {
33  return "framesync";
34 }
35 
36 static const AVOption framesync_options[] = {
37  { "eof_action", "Action to take when encountering EOF from secondary input ",
38  OFFSET(opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
39  EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
40  { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
41  { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
42  { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
43  { "shortest", "force termination when the shortest input terminates", OFFSET(opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
44  { "repeatlast", "extend last frame of secondary streams beyond EOF", OFFSET(opt_repeatlast), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
45  { NULL }
46 };
47 static const AVClass framesync_class = {
49  .class_name = "framesync",
50  .item_name = framesync_name,
51  .category = AV_CLASS_CATEGORY_FILTER,
52  .option = framesync_options,
53  .parent_log_context_offset = OFFSET(parent),
54 };
55 
56 enum {
60 };
61 
62 static int consume_from_fifos(FFFrameSync *fs);
63 
65 {
66  return &framesync_class;
67 }
68 
70 {
71  if (fs->class)
72  return;
73  fs->class = &framesync_class;
75 }
76 
77 int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
78 {
79  /* For filters with several outputs, we will not be able to assume which
80  output is relevant for ff_outlink_frame_wanted() and
81  ff_outlink_set_status(). To be designed when needed. */
82  av_assert0(parent->nb_outputs == 1);
83 
85  fs->parent = parent;
86  fs->nb_in = nb_in;
87 
88  fs->in = av_calloc(nb_in, sizeof(*fs->in));
89  if (!fs->in)
90  return AVERROR(ENOMEM);
91  return 0;
92 }
93 
95 {
96  fs->eof = 1;
97  fs->frame_ready = 0;
99 }
100 
102 {
103  unsigned i, level = 0;
104 
105  for (i = 0; i < fs->nb_in; i++)
106  if (fs->in[i].state != STATE_EOF)
107  level = FFMAX(level, fs->in[i].sync);
108  av_assert0(level <= fs->sync_level);
109  if (level < fs->sync_level)
110  av_log(fs, AV_LOG_VERBOSE, "Sync level %u\n", level);
111  if (level)
112  fs->sync_level = level;
113  else
114  framesync_eof(fs);
115 }
116 
118 {
119  unsigned i;
120 
121  if (!fs->opt_repeatlast || fs->opt_eof_action == EOF_ACTION_PASS) {
122  fs->opt_repeatlast = 0;
124  }
125  if (fs->opt_shortest || fs->opt_eof_action == EOF_ACTION_ENDALL) {
126  fs->opt_shortest = 1;
128  }
129  if (!fs->opt_repeatlast) {
130  for (i = 1; i < fs->nb_in; i++) {
131  fs->in[i].after = EXT_NULL;
132  fs->in[i].sync = 0;
133  }
134  }
135  if (fs->opt_shortest) {
136  for (i = 0; i < fs->nb_in; i++)
137  fs->in[i].after = EXT_STOP;
138  }
139 
140  if (!fs->time_base.num) {
141  for (i = 0; i < fs->nb_in; i++) {
142  if (fs->in[i].sync) {
143  if (fs->time_base.num) {
144  fs->time_base = av_gcd_q(fs->time_base, fs->in[i].time_base,
146  } else {
147  fs->time_base = fs->in[i].time_base;
148  }
149  }
150  }
151  if (!fs->time_base.num) {
152  av_log(fs, AV_LOG_ERROR, "Impossible to set time base\n");
153  return AVERROR(EINVAL);
154  }
155  av_log(fs, AV_LOG_VERBOSE, "Selected %d/%d time base\n",
156  fs->time_base.num, fs->time_base.den);
157  }
158 
159  for (i = 0; i < fs->nb_in; i++)
160  fs->in[i].pts = fs->in[i].pts_next = AV_NOPTS_VALUE;
161  fs->sync_level = UINT_MAX;
163 
164  return 0;
165 }
166 
168 {
169  unsigned i;
170  int64_t pts;
171  int ret;
172 
173  while (!(fs->frame_ready || fs->eof)) {
174  ret = consume_from_fifos(fs);
175  if (ret <= 0)
176  return ret;
177 
178  pts = INT64_MAX;
179  for (i = 0; i < fs->nb_in; i++)
180  if (fs->in[i].have_next && fs->in[i].pts_next < pts)
181  pts = fs->in[i].pts_next;
182  if (pts == INT64_MAX) {
183  framesync_eof(fs);
184  break;
185  }
186  for (i = 0; i < fs->nb_in; i++) {
187  if (fs->in[i].pts_next == pts ||
188  (fs->in[i].before == EXT_INFINITY &&
189  fs->in[i].state == STATE_BOF)) {
190  av_frame_free(&fs->in[i].frame);
191  fs->in[i].frame = fs->in[i].frame_next;
192  fs->in[i].pts = fs->in[i].pts_next;
193  fs->in[i].frame_next = NULL;
194  fs->in[i].pts_next = AV_NOPTS_VALUE;
195  fs->in[i].have_next = 0;
196  fs->in[i].state = fs->in[i].frame ? STATE_RUN : STATE_EOF;
197  if (fs->in[i].sync == fs->sync_level && fs->in[i].frame)
198  fs->frame_ready = 1;
199  if (fs->in[i].state == STATE_EOF &&
200  fs->in[i].after == EXT_STOP)
201  framesync_eof(fs);
202  }
203  }
204  if (fs->frame_ready)
205  for (i = 0; i < fs->nb_in; i++)
206  if ((fs->in[i].state == STATE_BOF &&
207  fs->in[i].before == EXT_STOP))
208  fs->frame_ready = 0;
209  fs->pts = pts;
210  }
211  return 0;
212 }
213 
214 static int64_t framesync_pts_extrapolate(FFFrameSync *fs, unsigned in,
215  int64_t pts)
216 {
217  /* Possible enhancement: use the link's frame rate */
218  return pts + 1;
219 }
220 
222 {
223  int64_t pts;
224 
225  av_assert0(!fs->in[in].have_next);
226  av_assert0(frame);
227  pts = av_rescale_q(frame->pts, fs->in[in].time_base, fs->time_base);
228  frame->pts = pts;
229  fs->in[in].frame_next = frame;
230  fs->in[in].pts_next = pts;
231  fs->in[in].have_next = 1;
232 }
233 
234 static void framesync_inject_status(FFFrameSync *fs, unsigned in, int status, int64_t pts)
235 {
236  av_assert0(!fs->in[in].have_next);
237  pts = fs->in[in].state != STATE_RUN || fs->in[in].after == EXT_INFINITY
238  ? INT64_MAX : framesync_pts_extrapolate(fs, in, fs->in[in].pts);
239  fs->in[in].sync = 0;
241  fs->in[in].frame_next = NULL;
242  fs->in[in].pts_next = pts;
243  fs->in[in].have_next = 1;
244 }
245 
246 int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe,
247  unsigned get)
248 {
249  AVFrame *frame;
250  unsigned need_copy = 0, i;
251  int64_t pts_next;
252  int ret;
253 
254  if (!fs->in[in].frame) {
255  *rframe = NULL;
256  return 0;
257  }
258  frame = fs->in[in].frame;
259  if (get) {
260  /* Find out if we need to copy the frame: is there another sync
261  stream, and do we know if its current frame will outlast this one? */
262  pts_next = fs->in[in].have_next ? fs->in[in].pts_next : INT64_MAX;
263  for (i = 0; i < fs->nb_in && !need_copy; i++)
264  if (i != in && fs->in[i].sync &&
265  (!fs->in[i].have_next || fs->in[i].pts_next < pts_next))
266  need_copy = 1;
267  if (need_copy) {
268  if (!(frame = av_frame_clone(frame)))
269  return AVERROR(ENOMEM);
270  if ((ret = av_frame_make_writable(frame)) < 0) {
271  av_frame_free(&frame);
272  return ret;
273  }
274  } else {
275  fs->in[in].frame = NULL;
276  }
277  fs->frame_ready = 0;
278  }
279  *rframe = frame;
280  return 0;
281 }
282 
284 {
285  unsigned i;
286 
287  for (i = 0; i < fs->nb_in; i++) {
288  av_frame_free(&fs->in[i].frame);
289  av_frame_free(&fs->in[i].frame_next);
290  }
291 
292  av_freep(&fs->in);
293 }
294 
296 {
297  AVFilterContext *ctx = fs->parent;
298  AVFrame *frame = NULL;
299  int64_t pts;
300  unsigned i, nb_active, nb_miss;
301  int ret, status;
302 
303  nb_active = nb_miss = 0;
304  for (i = 0; i < fs->nb_in; i++) {
305  if (fs->in[i].have_next || fs->in[i].state == STATE_EOF)
306  continue;
307  nb_active++;
308  ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
309  if (ret < 0)
310  return ret;
311  if (ret) {
312  av_assert0(frame);
313  framesync_inject_frame(fs, i, frame);
314  } else {
315  ret = ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts);
316  if (ret > 0) {
317  framesync_inject_status(fs, i, status, pts);
318  } else if (!ret) {
319  nb_miss++;
320  }
321  }
322  }
323  if (nb_miss) {
324  if (nb_miss == nb_active && !ff_outlink_frame_wanted(ctx->outputs[0]))
325  return FFERROR_NOT_READY;
326  for (i = 0; i < fs->nb_in; i++)
327  if (!fs->in[i].have_next && fs->in[i].state != STATE_EOF)
329  return 0;
330  }
331  return 1;
332 }
333 
335 {
336  int ret;
337 
338  ret = framesync_advance(fs);
339  if (ret < 0)
340  return ret;
341  if (fs->eof || !fs->frame_ready)
342  return 0;
343  ret = fs->on_event(fs);
344  if (ret < 0)
345  return ret;
346  fs->frame_ready = 0;
347 
348  return 0;
349 }
350 
352 {
353  int ret;
354 
355  ret = ff_framesync_init(fs, parent, 2);
356  if (ret < 0)
357  return ret;
358  fs->in[0].time_base = parent->inputs[0]->time_base;
359  fs->in[1].time_base = parent->inputs[1]->time_base;
360  fs->in[0].sync = 2;
361  fs->in[0].before = EXT_STOP;
362  fs->in[0].after = EXT_INFINITY;
363  fs->in[1].sync = 1;
364  fs->in[1].before = EXT_NULL;
365  fs->in[1].after = EXT_INFINITY;
366  return 0;
367 }
368 
370 {
371  AVFilterContext *ctx = fs->parent;
372  AVFrame *mainpic = NULL, *secondpic = NULL;
373  int ret;
374 
375  if ((ret = ff_framesync_get_frame(fs, 0, &mainpic, 1)) < 0 ||
376  (ret = ff_framesync_get_frame(fs, 1, &secondpic, 0)) < 0) {
377  av_frame_free(&mainpic);
378  return ret;
379  }
380  av_assert0(mainpic);
381  mainpic->pts = av_rescale_q(fs->pts, fs->time_base, ctx->outputs[0]->time_base);
382  if (ctx->is_disabled)
383  secondpic = NULL;
384  *f0 = mainpic;
385  *f1 = secondpic;
386  return 0;
387 }
388 
390 {
391  int ret;
392 
393  ret = ff_framesync_dualinput_get(fs, f0, f1);
394  if (ret < 0)
395  return ret;
396  ret = ff_inlink_make_frame_writable(fs->parent->inputs[0], f0);
397  if (ret < 0) {
398  av_frame_free(f0);
399  *f1 = NULL;
400  return ret;
401  }
402  return 0;
403 }
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link&#39;s FIFO and update the link&#39;s stats.
Definition: avfilter.c:1476
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
static void framesync_sync_level_update(FFFrameSync *fs)
Definition: framesync.c:101
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Main libavfilter public API header.
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1357
void ff_framesync_preinit(FFFrameSync *fs)
Pre-initialize a frame sync structure.
Definition: framesync.c:69
static const AVOption framesync_options[]
Definition: framesync.c:36
int num
Numerator.
Definition: rational.h:59
#define FFERROR_NOT_READY
Filters implementation helper functions.
Definition: filters.h:34
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:117
static const char * framesync_name(void *ptr)
Definition: framesync.c:31
static void framesync_inject_status(FFFrameSync *fs, unsigned in, int status, int64_t pts)
Definition: framesync.c:234
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: filters.h:189
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1602
static int ff_outlink_frame_wanted(AVFilterLink *link)
Test if a frame is wanted on an output link.
Definition: filters.h:172
static void framesync_eof(FFFrameSync *fs)
Definition: framesync.c:94
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t have_next
Boolean flagging the next frame, for internal use.
Definition: framesync.h:121
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
AVOptions.
int ff_framesync_init_dualinput(FFFrameSync *fs, AVFilterContext *parent)
Initialize a frame sync structure for dualinput.
Definition: framesync.c:351
const AVClass * ff_framesync_get_class(void)
Get the class for the framesync object.
Definition: framesync.c:64
int ff_framesync_dualinput_get(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
Definition: framesync.c:369
int ff_framesync_dualinput_get_writable(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
Same as ff_framesync_dualinput_get(), but make sure that f0 is writable.
Definition: framesync.c:389
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
unsigned sync_level
Synchronization level: only inputs with the same sync level are sync sources.
Definition: framesync.h:188
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
static AVFrame * frame
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
#define av_log(a,...)
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
Definition: avfilter.c:1431
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:283
AVFrame * frame_next
Next frame, for internal use.
Definition: framesync.h:106
Frame sync structure.
Definition: framesync.h:146
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
#define OFFSET(member)
Definition: framesync.c:28
simple assert() macros that are a bit more flexible than ISO C assert().
int opt_shortest
Definition: framesync.h:206
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:334
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
int opt_repeatlast
Definition: framesync.h:205
#define FLAGS
Definition: framesync.c:29
#define FFMAX(a, b)
Definition: common.h:94
uint8_t eof
Flag indicating that output has reached EOF.
Definition: framesync.h:198
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
AVFormatContext * ctx
Definition: movenc.c:48
AVRational time_base
Time base for the output events.
Definition: framesync.h:162
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
Make sure a frame is writable.
Definition: avfilter.c:1520
static int64_t framesync_pts_extrapolate(FFFrameSync *fs, unsigned in, int64_t pts)
Definition: framesync.c:214
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:541
static const AVClass framesync_class
Definition: framesync.c:47
Extend the frame to infinity.
Definition: framesync.h:75
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:77
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t state
State: before first, in stream or after EOF, for internal use.
Definition: framesync.h:126
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events...
Definition: framesync.h:139
Describe the class of an AVClass context structure.
Definition: log.h:67
Ignore this stream and continue processing the other ones.
Definition: framesync.h:70
AVRational av_gcd_q(AVRational a, AVRational b, int max_den, AVRational def)
Return the best rational so that a and b are multiple of it.
Definition: rational.c:186
unsigned nb_in
Number of input streams.
Definition: framesync.h:157
AVFrame * frame
Current frame, may be NULL before the first one or after EOF.
Definition: framesync.h:101
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static int consume_from_fifos(FFFrameSync *fs)
Definition: framesync.c:295
static int64_t pts
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:612
uint8_t frame_ready
Flag indicating that a frame event is ready.
Definition: framesync.h:193
uint8_t level
Definition: svq3.c:210
int version
LIBAVUTIL_VERSION with which this structure was created.
Definition: log.h:93
int opt_eof_action
Definition: framesync.h:207
int64_t pts
PTS of the current frame.
Definition: framesync.h:111
int den
Denominator.
Definition: rational.h:60
Completely stop all streams with this one.
Definition: framesync.h:65
static int framesync_advance(FFFrameSync *fs)
Definition: framesync.c:167
An instance of a filter.
Definition: avfilter.h:338
#define av_freep(p)
static void framesync_inject_frame(FFFrameSync *fs, unsigned in, AVFrame *frame)
Definition: framesync.c:221
internal API functions
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:246
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
const AVClass * class
Definition: framesync.h:147
int64_t pts_next
PTS of the next frame, for internal use.
Definition: framesync.h:116