FFmpeg  4.0
avf_concat.c
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1 /*
2  * Copyright (c) 2012 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
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.
14  * See the 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 /**
22  * @file
23  * concat audio-video filter
24  */
25 
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
29 #include "libavutil/opt.h"
30 #include "avfilter.h"
31 #define FF_BUFQUEUE_SIZE 256
32 #include "bufferqueue.h"
33 #include "internal.h"
34 #include "video.h"
35 #include "audio.h"
36 
37 #define TYPE_ALL 2
38 
39 typedef struct ConcatContext {
40  const AVClass *class;
41  unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
42  unsigned nb_segments;
43  unsigned cur_idx; /**< index of the first input of current segment */
44  int64_t delta_ts; /**< timestamp to add to produce output timestamps */
45  unsigned nb_in_active; /**< number of active inputs in current segment */
46  unsigned unsafe;
47  struct concat_in {
48  int64_t pts;
49  int64_t nb_frames;
50  unsigned eof;
51  struct FFBufQueue queue;
52  } *in;
54 
55 #define OFFSET(x) offsetof(ConcatContext, x)
56 #define A AV_OPT_FLAG_AUDIO_PARAM
57 #define F AV_OPT_FLAG_FILTERING_PARAM
58 #define V AV_OPT_FLAG_VIDEO_PARAM
59 
60 static const AVOption concat_options[] = {
61  { "n", "specify the number of segments", OFFSET(nb_segments),
62  AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
63  { "v", "specify the number of video streams",
65  AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
66  { "a", "specify the number of audio streams",
68  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
69  { "unsafe", "enable unsafe mode",
70  OFFSET(unsafe),
71  AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
72  { NULL }
73 };
74 
75 AVFILTER_DEFINE_CLASS(concat);
76 
78 {
79  ConcatContext *cat = ctx->priv;
80  unsigned type, nb_str, idx0 = 0, idx, str, seg;
83  int ret;
84 
85  for (type = 0; type < TYPE_ALL; type++) {
86  nb_str = cat->nb_streams[type];
87  for (str = 0; str < nb_str; str++) {
88  idx = idx0;
89 
90  /* Set the output formats */
91  formats = ff_all_formats(type);
92  if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->in_formats)) < 0)
93  return ret;
94 
95  if (type == AVMEDIA_TYPE_AUDIO) {
96  rates = ff_all_samplerates();
97  if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->in_samplerates)) < 0)
98  return ret;
99  layouts = ff_all_channel_layouts();
100  if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->in_channel_layouts)) < 0)
101  return ret;
102  }
103 
104  /* Set the same formats for each corresponding input */
105  for (seg = 0; seg < cat->nb_segments; seg++) {
106  if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->out_formats)) < 0)
107  return ret;
108  if (type == AVMEDIA_TYPE_AUDIO) {
109  if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->out_samplerates)) < 0 ||
110  (ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->out_channel_layouts)) < 0)
111  return ret;
112  }
113  idx += ctx->nb_outputs;
114  }
115 
116  idx0++;
117  }
118  }
119  return 0;
120 }
121 
122 static int config_output(AVFilterLink *outlink)
123 {
124  AVFilterContext *ctx = outlink->src;
125  ConcatContext *cat = ctx->priv;
126  unsigned out_no = FF_OUTLINK_IDX(outlink);
127  unsigned in_no = out_no, seg;
128  AVFilterLink *inlink = ctx->inputs[in_no];
129 
130  /* enhancement: find a common one */
131  outlink->time_base = AV_TIME_BASE_Q;
132  outlink->w = inlink->w;
133  outlink->h = inlink->h;
134  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
135  outlink->format = inlink->format;
136  for (seg = 1; seg < cat->nb_segments; seg++) {
137  inlink = ctx->inputs[in_no += ctx->nb_outputs];
138  if (!outlink->sample_aspect_ratio.num)
139  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
140  /* possible enhancement: unsafe mode, do not check */
141  if (outlink->w != inlink->w ||
142  outlink->h != inlink->h ||
143  outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
144  inlink->sample_aspect_ratio.num ||
145  outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
146  av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
147  "(size %dx%d, SAR %d:%d) do not match the corresponding "
148  "output link %s parameters (%dx%d, SAR %d:%d)\n",
149  ctx->input_pads[in_no].name, inlink->w, inlink->h,
150  inlink->sample_aspect_ratio.num,
151  inlink->sample_aspect_ratio.den,
152  ctx->input_pads[out_no].name, outlink->w, outlink->h,
153  outlink->sample_aspect_ratio.num,
154  outlink->sample_aspect_ratio.den);
155  if (!cat->unsafe)
156  return AVERROR(EINVAL);
157  }
158  }
159 
160  return 0;
161 }
162 
163 static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
164 {
165  ConcatContext *cat = ctx->priv;
166  unsigned out_no = in_no % ctx->nb_outputs;
167  AVFilterLink * inlink = ctx-> inputs[ in_no];
168  AVFilterLink *outlink = ctx->outputs[out_no];
169  struct concat_in *in = &cat->in[in_no];
170 
171  buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
172  in->pts = buf->pts;
173  in->nb_frames++;
174  /* add duration to input PTS */
175  if (inlink->sample_rate)
176  /* use number of audio samples */
177  in->pts += av_rescale_q(buf->nb_samples,
178  av_make_q(1, inlink->sample_rate),
179  outlink->time_base);
180  else if (in->nb_frames >= 2)
181  /* use mean duration */
182  in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
183 
184  buf->pts += cat->delta_ts;
185  return ff_filter_frame(outlink, buf);
186 }
187 
188 static int process_frame(AVFilterLink *inlink, AVFrame *buf)
189 {
190  AVFilterContext *ctx = inlink->dst;
191  ConcatContext *cat = ctx->priv;
192  unsigned in_no = FF_INLINK_IDX(inlink);
193 
194  if (in_no < cat->cur_idx) {
195  av_log(ctx, AV_LOG_ERROR, "Frame after EOF on input %s\n",
196  ctx->input_pads[in_no].name);
197  av_frame_free(&buf);
198  } else if (in_no >= cat->cur_idx + ctx->nb_outputs) {
199  ff_bufqueue_add(ctx, &cat->in[in_no].queue, buf);
200  } else {
201  return push_frame(ctx, in_no, buf);
202  }
203  return 0;
204 }
205 
206 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
207 {
208  AVFilterContext *ctx = inlink->dst;
209  unsigned in_no = FF_INLINK_IDX(inlink);
210  AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
211 
212  return ff_get_video_buffer(outlink, w, h);
213 }
214 
215 static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
216 {
217  AVFilterContext *ctx = inlink->dst;
218  unsigned in_no = FF_INLINK_IDX(inlink);
219  AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
220 
221  return ff_get_audio_buffer(outlink, nb_samples);
222 }
223 
224 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
225 {
226  return process_frame(inlink, buf);
227 }
228 
229 static void close_input(AVFilterContext *ctx, unsigned in_no)
230 {
231  ConcatContext *cat = ctx->priv;
232 
233  cat->in[in_no].eof = 1;
234  cat->nb_in_active--;
235  av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
236  ctx->input_pads[in_no].name, cat->nb_in_active);
237 }
238 
239 static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
240 {
241  ConcatContext *cat = ctx->priv;
242  unsigned i = cat->cur_idx;
243  unsigned imax = i + ctx->nb_outputs;
244  int64_t pts;
245 
246  pts = cat->in[i++].pts;
247  for (; i < imax; i++)
248  pts = FFMAX(pts, cat->in[i].pts);
249  cat->delta_ts += pts;
250  *seg_delta = pts;
251 }
252 
253 static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
254  int64_t seg_delta)
255 {
256  ConcatContext *cat = ctx->priv;
257  AVFilterLink *outlink = ctx->outputs[out_no];
258  int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
259  int64_t nb_samples, sent = 0;
260  int frame_nb_samples, ret;
261  AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
262  AVFrame *buf;
263 
264  if (!rate_tb.den)
265  return AVERROR_BUG;
266  nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
267  outlink->time_base, rate_tb);
268  frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
269  while (nb_samples) {
270  frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
271  buf = ff_get_audio_buffer(outlink, frame_nb_samples);
272  if (!buf)
273  return AVERROR(ENOMEM);
274  av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
275  outlink->channels, outlink->format);
276  buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
277  ret = ff_filter_frame(outlink, buf);
278  if (ret < 0)
279  return ret;
280  sent += frame_nb_samples;
281  nb_samples -= frame_nb_samples;
282  }
283  return 0;
284 }
285 
287 {
288  int ret;
289  ConcatContext *cat = ctx->priv;
290  unsigned str, str_max;
291  int64_t seg_delta;
292 
293  find_next_delta_ts(ctx, &seg_delta);
294  cat->cur_idx += ctx->nb_outputs;
295  cat->nb_in_active = ctx->nb_outputs;
296  av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
297  cat->delta_ts);
298 
299  if (cat->cur_idx < ctx->nb_inputs) {
300  /* pad audio streams with silence */
301  str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
302  str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
303  for (; str < str_max; str++) {
304  ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
305  seg_delta);
306  if (ret < 0)
307  return ret;
308  }
309  /* flush queued buffers */
310  /* possible enhancement: flush in PTS order */
311  str_max = cat->cur_idx + ctx->nb_outputs;
312  for (str = cat->cur_idx; str < str_max; str++) {
313  while (cat->in[str].queue.available) {
314  ret = push_frame(ctx, str, ff_bufqueue_get(&cat->in[str].queue));
315  if (ret < 0)
316  return ret;
317  }
318  }
319  }
320  return 0;
321 }
322 
323 static int request_frame(AVFilterLink *outlink)
324 {
325  AVFilterContext *ctx = outlink->src;
326  ConcatContext *cat = ctx->priv;
327  unsigned out_no = FF_OUTLINK_IDX(outlink);
328  unsigned in_no = out_no + cat->cur_idx;
329  unsigned str, str_max;
330  int ret;
331 
332  while (1) {
333  if (in_no >= ctx->nb_inputs)
334  return AVERROR_EOF;
335  if (!cat->in[in_no].eof) {
336  ret = ff_request_frame(ctx->inputs[in_no]);
337  if (ret != AVERROR_EOF)
338  return ret;
339  close_input(ctx, in_no);
340  }
341  /* cycle on all inputs to finish the segment */
342  /* possible enhancement: request in PTS order */
343  str_max = cat->cur_idx + ctx->nb_outputs - 1;
344  for (str = cat->cur_idx; cat->nb_in_active;
345  str = str == str_max ? cat->cur_idx : str + 1) {
346  if (cat->in[str].eof)
347  continue;
348  ret = ff_request_frame(ctx->inputs[str]);
349  if (ret != AVERROR_EOF)
350  return ret;
351  close_input(ctx, str);
352  }
353  ret = flush_segment(ctx);
354  if (ret < 0)
355  return ret;
356  in_no += ctx->nb_outputs;
357  }
358 }
359 
361 {
362  ConcatContext *cat = ctx->priv;
363  unsigned seg, type, str;
364  int ret;
365 
366  /* create input pads */
367  for (seg = 0; seg < cat->nb_segments; seg++) {
368  for (type = 0; type < TYPE_ALL; type++) {
369  for (str = 0; str < cat->nb_streams[type]; str++) {
370  AVFilterPad pad = {
371  .type = type,
372  .get_video_buffer = get_video_buffer,
373  .get_audio_buffer = get_audio_buffer,
374  .filter_frame = filter_frame,
375  };
376  pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
377  if ((ret = ff_insert_inpad(ctx, ctx->nb_inputs, &pad)) < 0) {
378  av_freep(&pad.name);
379  return ret;
380  }
381  }
382  }
383  }
384  /* create output pads */
385  for (type = 0; type < TYPE_ALL; type++) {
386  for (str = 0; str < cat->nb_streams[type]; str++) {
387  AVFilterPad pad = {
388  .type = type,
389  .config_props = config_output,
390  .request_frame = request_frame,
391  };
392  pad.name = av_asprintf("out:%c%d", "va"[type], str);
393  if ((ret = ff_insert_outpad(ctx, ctx->nb_outputs, &pad)) < 0) {
394  av_freep(&pad.name);
395  return ret;
396  }
397  }
398  }
399 
400  cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
401  if (!cat->in)
402  return AVERROR(ENOMEM);
403  cat->nb_in_active = ctx->nb_outputs;
404  return 0;
405 }
406 
408 {
409  ConcatContext *cat = ctx->priv;
410  unsigned i;
411 
412  for (i = 0; i < ctx->nb_inputs; i++) {
413  av_freep(&ctx->input_pads[i].name);
414  ff_bufqueue_discard_all(&cat->in[i].queue);
415  }
416  for (i = 0; i < ctx->nb_outputs; i++)
417  av_freep(&ctx->output_pads[i].name);
418  av_freep(&cat->in);
419 }
420 
421 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
422  char *res, int res_len, int flags)
423 {
424  int ret = AVERROR(ENOSYS);
425 
426  if (!strcmp(cmd, "next")) {
427  av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
428  return flush_segment(ctx);
429  }
430 
431  return ret;
432 }
433 
435  .name = "concat",
436  .description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
437  .init = init,
438  .uninit = uninit,
439  .query_formats = query_formats,
440  .priv_size = sizeof(ConcatContext),
441  .inputs = NULL,
442  .outputs = NULL,
443  .priv_class = &concat_class,
446 };
static AVFrame * ff_bufqueue_get(struct FFBufQueue *queue)
Get the first buffer from the queue and remove it.
Definition: bufferqueue.h:98
#define NULL
Definition: coverity.c:32
static AVFrame * get_audio_buffer(AVFilterLink *inlink, int nb_samples)
Definition: avf_concat.c:215
static int flush_segment(AVFilterContext *ctx)
Definition: avf_concat.c:286
static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no, int64_t seg_delta)
Definition: avf_concat.c:253
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
static av_cold int init(AVFilterContext *ctx)
Definition: avf_concat.c:360
AVOption.
Definition: opt.h:246
unsigned nb_streams[TYPE_ALL]
number of out streams of each type
Definition: avf_concat.c:41
Main libavfilter public API header.
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:105
static int request_frame(AVFilterLink *outlink)
Definition: avf_concat.c:323
int num
Numerator.
Definition: rational.h:59
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
#define FF_OUTLINK_IDX(link)
Definition: internal.h:349
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
AVFilter ff_avf_concat
Definition: avf_concat.c:434
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
#define V
Definition: avf_concat.c:58
Structure holding the queue.
Definition: bufferqueue.h:49
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_concat.c:407
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
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:311
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
Definition: avf_concat.c:206
static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
Definition: avf_concat.c:163
static int flags
Definition: log.c:55
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:111
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: avf_concat.c:421
#define av_log(a,...)
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:350
A filter pad used for either input or output.
Definition: internal.h:54
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
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Fill an audio buffer with silence.
Definition: samplefmt.c:237
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
#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
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: avf_concat.c:224
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define A
Definition: avf_concat.c:56
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFMAX(a, b)
Definition: common.h:94
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
int64_t delta_ts
timestamp to add to produce output timestamps
Definition: avf_concat.c:44
audio channel layout utility functions
static int process_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: avf_concat.c:188
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
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 FFMIN(a, b)
Definition: common.h:96
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
static void close_input(AVFilterContext *ctx, unsigned in_no)
Definition: avf_concat.c:229
uint8_t w
Definition: llviddspenc.c:38
static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
Definition: avf_concat.c:239
unsigned nb_segments
Definition: avf_concat.c:42
static const AVClass concat_class
Definition: concatdec.c:765
const char AVS_Value args
Definition: avisynth_c.h:780
AVFormatContext * ctx
Definition: movenc.c:48
static void ff_bufqueue_discard_all(struct FFBufQueue *queue)
Unref and remove all buffers from the queue.
Definition: bufferqueue.h:111
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
struct FFBufQueue queue
Definition: avf_concat.c:51
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (...
Definition: formats.c:401
#define cat(a, bpp, b)
Definition: vp9dsp_init.h:29
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
A list of supported channel layouts.
Definition: formats.h:85
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
unsigned short available
number of available buffers
Definition: bufferqueue.h:52
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
unsigned cur_idx
index of the first input of current segment
Definition: avf_concat.c:43
void * buf
Definition: avisynth_c.h:690
#define OFFSET(x)
Definition: avf_concat.c:55
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
cl_device_type type
unsigned nb_in_active
number of active inputs in current segment
Definition: avf_concat.c:45
const char * name
Filter name.
Definition: avfilter.h:148
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
#define FF_INLINK_IDX(link)
Find the index of a link.
Definition: internal.h:348
static int query_formats(AVFilterContext *ctx)
Definition: avf_concat.c:77
#define TYPE_ALL
Definition: avf_concat.c:37
#define F
Definition: avf_concat.c:57
unsigned unsafe
Definition: avf_concat.c:46
int den
Denominator.
Definition: rational.h:60
static int config_output(AVFilterLink *outlink)
Definition: avf_concat.c:122
struct ConcatContext::concat_in * in
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
AVFILTER_DEFINE_CLASS(concat)
#define av_freep(p)
static const AVOption concat_options[]
Definition: avf_concat.c:60
static void ff_bufqueue_add(void *log, struct FFBufQueue *queue, AVFrame *buf)
Add a buffer to the queue.
Definition: bufferqueue.h:71
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
formats
Definition: signature.h:48
internal API functions
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:265
static const int rates[]
Definition: avresample.c:176
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:285
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:284
static int ff_insert_inpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new input pad for the filter.
Definition: internal.h:277