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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 
94 static void framesync_eof(FFFrameSync *fs)
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  int64_t gcd, lcm;
121 
122  if (!fs->opt_repeatlast || fs->opt_eof_action == EOF_ACTION_PASS) {
123  fs->opt_repeatlast = 0;
125  }
126  if (fs->opt_shortest || fs->opt_eof_action == EOF_ACTION_ENDALL) {
127  fs->opt_shortest = 1;
129  }
130  if (fs->opt_shortest) {
131  for (i = 0; i < fs->nb_in; i++)
132  fs->in[i].after = EXT_STOP;
133  }
134  if (!fs->opt_repeatlast) {
135  for (i = 1; i < fs->nb_in; i++) {
136  fs->in[i].after = EXT_NULL;
137  fs->in[i].sync = 0;
138  }
139  }
140 
141  if (!fs->time_base.num) {
142  for (i = 0; i < fs->nb_in; i++) {
143  if (fs->in[i].sync) {
144  if (fs->time_base.num) {
145  gcd = av_gcd(fs->time_base.den, fs->in[i].time_base.den);
146  lcm = (fs->time_base.den / gcd) * fs->in[i].time_base.den;
147  if (lcm < AV_TIME_BASE / 2) {
148  fs->time_base.den = lcm;
149  fs->time_base.num = av_gcd(fs->time_base.num,
150  fs->in[i].time_base.num);
151  } else {
152  fs->time_base.num = 1;
153  fs->time_base.den = AV_TIME_BASE;
154  break;
155  }
156  } else {
157  fs->time_base = fs->in[i].time_base;
158  }
159  }
160  }
161  if (!fs->time_base.num) {
162  av_log(fs, AV_LOG_ERROR, "Impossible to set time base\n");
163  return AVERROR(EINVAL);
164  }
165  av_log(fs, AV_LOG_VERBOSE, "Selected %d/%d time base\n",
166  fs->time_base.num, fs->time_base.den);
167  }
168 
169  for (i = 0; i < fs->nb_in; i++)
170  fs->in[i].pts = fs->in[i].pts_next = AV_NOPTS_VALUE;
171  fs->sync_level = UINT_MAX;
173 
174  return 0;
175 }
176 
178 {
179  unsigned i;
180  int64_t pts;
181  int ret;
182 
183  while (!(fs->frame_ready || fs->eof)) {
184  ret = consume_from_fifos(fs);
185  if (ret <= 0)
186  return ret;
187 
188  pts = INT64_MAX;
189  for (i = 0; i < fs->nb_in; i++)
190  if (fs->in[i].have_next && fs->in[i].pts_next < pts)
191  pts = fs->in[i].pts_next;
192  if (pts == INT64_MAX) {
193  framesync_eof(fs);
194  break;
195  }
196  for (i = 0; i < fs->nb_in; i++) {
197  if (fs->in[i].pts_next == pts ||
198  (fs->in[i].before == EXT_INFINITY &&
199  fs->in[i].state == STATE_BOF)) {
200  av_frame_free(&fs->in[i].frame);
201  fs->in[i].frame = fs->in[i].frame_next;
202  fs->in[i].pts = fs->in[i].pts_next;
203  fs->in[i].frame_next = NULL;
204  fs->in[i].pts_next = AV_NOPTS_VALUE;
205  fs->in[i].have_next = 0;
206  fs->in[i].state = fs->in[i].frame ? STATE_RUN : STATE_EOF;
207  if (fs->in[i].sync == fs->sync_level && fs->in[i].frame)
208  fs->frame_ready = 1;
209  if (fs->in[i].state == STATE_EOF &&
210  fs->in[i].after == EXT_STOP)
211  framesync_eof(fs);
212  }
213  }
214  if (fs->frame_ready)
215  for (i = 0; i < fs->nb_in; i++)
216  if ((fs->in[i].state == STATE_BOF &&
217  fs->in[i].before == EXT_STOP))
218  fs->frame_ready = 0;
219  fs->pts = pts;
220  }
221  return 0;
222 }
223 
224 static int64_t framesync_pts_extrapolate(FFFrameSync *fs, unsigned in,
225  int64_t pts)
226 {
227  /* Possible enhancement: use the link's frame rate */
228  return pts + 1;
229 }
230 
231 static void framesync_inject_frame(FFFrameSync *fs, unsigned in, AVFrame *frame)
232 {
233  int64_t pts;
234 
235  av_assert0(!fs->in[in].have_next);
236  av_assert0(frame);
237  pts = av_rescale_q(frame->pts, fs->in[in].time_base, fs->time_base);
238  frame->pts = pts;
239  fs->in[in].frame_next = frame;
240  fs->in[in].pts_next = pts;
241  fs->in[in].have_next = 1;
242 }
243 
244 static void framesync_inject_status(FFFrameSync *fs, unsigned in, int status, int64_t pts)
245 {
246  av_assert0(!fs->in[in].have_next);
247  pts = fs->in[in].state != STATE_RUN || fs->in[in].after == EXT_INFINITY
248  ? INT64_MAX : framesync_pts_extrapolate(fs, in, fs->in[in].pts);
249  fs->in[in].sync = 0;
251  fs->in[in].frame_next = NULL;
252  fs->in[in].pts_next = pts;
253  fs->in[in].have_next = 1;
254 }
255 
256 int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe,
257  unsigned get)
258 {
259  AVFrame *frame;
260  unsigned need_copy = 0, i;
261  int64_t pts_next;
262  int ret;
263 
264  if (!fs->in[in].frame) {
265  *rframe = NULL;
266  return 0;
267  }
268  frame = fs->in[in].frame;
269  if (get) {
270  /* Find out if we need to copy the frame: is there another sync
271  stream, and do we know if its current frame will outlast this one? */
272  pts_next = fs->in[in].have_next ? fs->in[in].pts_next : INT64_MAX;
273  for (i = 0; i < fs->nb_in && !need_copy; i++)
274  if (i != in && fs->in[i].sync &&
275  (!fs->in[i].have_next || fs->in[i].pts_next < pts_next))
276  need_copy = 1;
277  if (need_copy) {
278  if (!(frame = av_frame_clone(frame)))
279  return AVERROR(ENOMEM);
280  if ((ret = av_frame_make_writable(frame)) < 0) {
281  av_frame_free(&frame);
282  return ret;
283  }
284  } else {
285  fs->in[in].frame = NULL;
286  }
287  fs->frame_ready = 0;
288  }
289  *rframe = frame;
290  return 0;
291 }
292 
294 {
295  unsigned i;
296 
297  for (i = 0; i < fs->nb_in; i++) {
298  av_frame_free(&fs->in[i].frame);
299  av_frame_free(&fs->in[i].frame_next);
300  }
301 
302  av_freep(&fs->in);
303 }
304 
306 {
307  AVFilterContext *ctx = fs->parent;
308  AVFrame *frame = NULL;
309  int64_t pts;
310  unsigned i, nb_active, nb_miss;
311  int ret, status;
312 
313  nb_active = nb_miss = 0;
314  for (i = 0; i < fs->nb_in; i++) {
315  if (fs->in[i].have_next || fs->in[i].state == STATE_EOF)
316  continue;
317  nb_active++;
318  ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
319  if (ret < 0)
320  return ret;
321  if (ret) {
322  av_assert0(frame);
323  framesync_inject_frame(fs, i, frame);
324  } else {
325  ret = ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts);
326  if (ret > 0) {
327  framesync_inject_status(fs, i, status, pts);
328  } else if (!ret) {
329  nb_miss++;
330  }
331  }
332  }
333  if (nb_miss) {
334  if (nb_miss == nb_active && !ff_outlink_frame_wanted(ctx->outputs[0]))
335  return FFERROR_NOT_READY;
336  for (i = 0; i < fs->nb_in; i++)
337  if (!fs->in[i].have_next && fs->in[i].state != STATE_EOF)
339  return 0;
340  }
341  return 1;
342 }
343 
345 {
346  int ret;
347 
348  ret = framesync_advance(fs);
349  if (ret < 0)
350  return ret;
351  if (fs->eof || !fs->frame_ready)
352  return 0;
353  ret = fs->on_event(fs);
354  if (ret < 0)
355  return ret;
356  fs->frame_ready = 0;
357 
358  return 0;
359 }
360 
362 {
363  int ret;
364 
365  ret = ff_framesync_init(fs, parent, 2);
366  if (ret < 0)
367  return ret;
368  fs->in[0].time_base = parent->inputs[0]->time_base;
369  fs->in[1].time_base = parent->inputs[1]->time_base;
370  fs->in[0].sync = 2;
371  fs->in[0].before = EXT_STOP;
372  fs->in[0].after = EXT_INFINITY;
373  fs->in[1].sync = 1;
374  fs->in[1].before = EXT_NULL;
375  fs->in[1].after = EXT_INFINITY;
376  return 0;
377 }
378 
380 {
381  AVFilterContext *ctx = fs->parent;
382  AVFrame *mainpic = NULL, *secondpic = NULL;
383  int ret;
384 
385  if ((ret = ff_framesync_get_frame(fs, 0, &mainpic, 1)) < 0 ||
386  (ret = ff_framesync_get_frame(fs, 1, &secondpic, 0)) < 0) {
387  av_frame_free(&mainpic);
388  return ret;
389  }
390  av_assert0(mainpic);
391  mainpic->pts = av_rescale_q(fs->pts, fs->time_base, ctx->outputs[0]->time_base);
392  if (ctx->is_disabled)
393  secondpic = NULL;
394  *f0 = mainpic;
395  *f1 = secondpic;
396  return 0;
397 }
398 
400 {
401  int ret;
402 
403  ret = ff_framesync_dualinput_get(fs, f0, f1);
404  if (ret < 0)
405  return ret;
406  ret = ff_inlink_make_frame_writable(fs->parent->inputs[0], f0);
407  if (ret < 0) {
408  av_frame_free(f0);
409  av_frame_free(f1);
410  return ret;
411  }
412  return 0;
413 }
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
Definition: avfilter.c:1542
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
static void framesync_sync_level_update(FFFrameSync *fs)
Definition: framesync.c:101
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
Main libavfilter public API header.
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1291
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:244
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:169
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1663
static int ff_outlink_frame_wanted(AVFilterLink *link)
Test if a frame is wanted on an output link.
Definition: filters.h:152
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:230
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
AVOptions.
int ff_framesync_init_dualinput(FFFrameSync *fs, AVFilterContext *parent)
Initialize a frame sync structure for dualinput.
Definition: framesync.c:361
int ff_framesync_dualinput_get(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
Definition: framesync.c:379
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:399
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:294
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:1507
#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:293
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:163
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().
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
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's input and try to produce output.
Definition: framesync.c:344
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:1581
static int64_t framesync_pts_extrapolate(FFFrameSync *fs, unsigned in, int64_t pts)
Definition: framesync.c:224
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:492
static const AVClass framesync_class
Definition: framesync.c:47
Extend the frame to infinity.
Definition: framesync.h:75
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:77
const AVClass * framesync_get_class(void)
Get the class for the framesync object.
Definition: framesync.c:64
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
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
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:305
static int64_t pts
Global timestamp for the audio frames.
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:560
uint8_t frame_ready
Flag indicating that a frame event is ready.
Definition: framesync.h:193
uint8_t level
Definition: svq3.c:207
int version
LIBAVUTIL_VERSION with which this structure was created.
Definition: log.h:93
int opt_eof_action
Definition: framesync.h:207
if(ret< 0)
Definition: vf_mcdeint.c:279
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:177
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:231
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:256
#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