FFmpeg
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/avstring.h"
28 #include "libavutil/opt.h"
29 #include "avfilter.h"
30 #include "filters.h"
31 #include "formats.h"
32 #include "internal.h"
33 #include "video.h"
34 #include "audio.h"
35 
36 #define TYPE_ALL 2
37 
38 typedef struct ConcatContext {
39  const AVClass *class;
40  unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
41  unsigned nb_segments;
42  unsigned cur_idx; /**< index of the first input of current segment */
43  int64_t delta_ts; /**< timestamp to add to produce output timestamps */
44  unsigned nb_in_active; /**< number of active inputs in current segment */
45  unsigned unsafe;
46  struct concat_in {
47  int64_t pts;
48  int64_t nb_frames;
49  unsigned eof;
50  } *in;
52 
53 #define OFFSET(x) offsetof(ConcatContext, x)
54 #define A AV_OPT_FLAG_AUDIO_PARAM
55 #define F AV_OPT_FLAG_FILTERING_PARAM
56 #define V AV_OPT_FLAG_VIDEO_PARAM
57 
58 static const AVOption concat_options[] = {
59  { "n", "specify the number of segments", OFFSET(nb_segments),
60  AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
61  { "v", "specify the number of video streams",
63  AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
64  { "a", "specify the number of audio streams",
66  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
67  { "unsafe", "enable unsafe mode",
68  OFFSET(unsafe),
69  AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
70  { NULL }
71 };
72 
73 AVFILTER_DEFINE_CLASS(concat);
74 
76 {
77  ConcatContext *cat = ctx->priv;
78  unsigned type, nb_str, idx0 = 0, idx, str, seg;
81  int ret;
82 
83  for (type = 0; type < TYPE_ALL; type++) {
84  nb_str = cat->nb_streams[type];
85  for (str = 0; str < nb_str; str++) {
86  idx = idx0;
87 
88  /* Set the output formats */
90  if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->incfg.formats)) < 0)
91  return ret;
92 
93  if (type == AVMEDIA_TYPE_AUDIO) {
95  if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->incfg.samplerates)) < 0)
96  return ret;
98  if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->incfg.channel_layouts)) < 0)
99  return ret;
100  }
101 
102  /* Set the same formats for each corresponding input */
103  for (seg = 0; seg < cat->nb_segments; seg++) {
104  if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->outcfg.formats)) < 0)
105  return ret;
106  if (type == AVMEDIA_TYPE_AUDIO) {
107  if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->outcfg.samplerates)) < 0 ||
108  (ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->outcfg.channel_layouts)) < 0)
109  return ret;
110  }
111  idx += ctx->nb_outputs;
112  }
113 
114  idx0++;
115  }
116  }
117  return 0;
118 }
119 
120 static int config_output(AVFilterLink *outlink)
121 {
122  AVFilterContext *ctx = outlink->src;
123  ConcatContext *cat = ctx->priv;
124  unsigned out_no = FF_OUTLINK_IDX(outlink);
125  unsigned in_no = out_no, seg;
126  AVFilterLink *inlink = ctx->inputs[in_no];
127 
128  /* enhancement: find a common one */
129  outlink->time_base = AV_TIME_BASE_Q;
130  outlink->w = inlink->w;
131  outlink->h = inlink->h;
132  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
133  outlink->format = inlink->format;
134  outlink->frame_rate = inlink->frame_rate;
135 
136  for (seg = 1; seg < cat->nb_segments; seg++) {
137  inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
138  if (outlink->frame_rate.num != inlink->frame_rate.num ||
139  outlink->frame_rate.den != inlink->frame_rate.den) {
141  "Video inputs have different frame rates, output will be VFR\n");
142  outlink->frame_rate = av_make_q(1, 0);
143  break;
144  }
145  }
146 
147  for (seg = 1; seg < cat->nb_segments; seg++) {
148  inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
149  if (!outlink->sample_aspect_ratio.num)
150  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
151  /* possible enhancement: unsafe mode, do not check */
152  if (outlink->w != inlink->w ||
153  outlink->h != inlink->h ||
154  outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
155  inlink->sample_aspect_ratio.num ||
156  outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
157  av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
158  "(size %dx%d, SAR %d:%d) do not match the corresponding "
159  "output link %s parameters (%dx%d, SAR %d:%d)\n",
160  ctx->input_pads[in_no].name, inlink->w, inlink->h,
161  inlink->sample_aspect_ratio.num,
162  inlink->sample_aspect_ratio.den,
163  ctx->input_pads[out_no].name, outlink->w, outlink->h,
164  outlink->sample_aspect_ratio.num,
165  outlink->sample_aspect_ratio.den);
166  if (!cat->unsafe)
167  return AVERROR(EINVAL);
168  }
169  }
170 
171  return 0;
172 }
173 
174 static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
175 {
176  ConcatContext *cat = ctx->priv;
177  unsigned out_no = in_no % ctx->nb_outputs;
178  AVFilterLink * inlink = ctx-> inputs[ in_no];
179  AVFilterLink *outlink = ctx->outputs[out_no];
180  struct concat_in *in = &cat->in[in_no];
181 
182  buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
183  buf->duration = av_rescale_q(buf->duration, inlink->time_base, outlink->time_base);
184  in->pts = buf->pts;
185  in->nb_frames++;
186  /* add duration to input PTS */
187  if (inlink->sample_rate)
188  /* use number of audio samples */
189  in->pts += av_rescale_q(buf->nb_samples,
190  av_make_q(1, inlink->sample_rate),
191  outlink->time_base);
192  else if (in->nb_frames >= 2)
193  /* use mean duration */
194  in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
195 
196  buf->pts += cat->delta_ts;
197  return ff_filter_frame(outlink, buf);
198 }
199 
201 {
202  AVFilterContext *ctx = inlink->dst;
203  unsigned in_no = FF_INLINK_IDX(inlink);
204  AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
205 
206  return ff_get_video_buffer(outlink, w, h);
207 }
208 
209 static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
210 {
211  AVFilterContext *ctx = inlink->dst;
212  unsigned in_no = FF_INLINK_IDX(inlink);
213  AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
214 
215  return ff_get_audio_buffer(outlink, nb_samples);
216 }
217 
218 static void close_input(AVFilterContext *ctx, unsigned in_no)
219 {
220  ConcatContext *cat = ctx->priv;
221 
222  cat->in[in_no].eof = 1;
223  cat->nb_in_active--;
224  av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
225  ctx->input_pads[in_no].name, cat->nb_in_active);
226 }
227 
228 static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
229 {
230  ConcatContext *cat = ctx->priv;
231  unsigned i = cat->cur_idx;
232  unsigned imax = i + ctx->nb_outputs;
233  int64_t pts;
234 
235  pts = cat->in[i++].pts;
236  for (; i < imax; i++)
237  pts = FFMAX(pts, cat->in[i].pts);
238  cat->delta_ts += pts;
239  *seg_delta = pts;
240 }
241 
242 static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
243  int64_t seg_delta)
244 {
245  ConcatContext *cat = ctx->priv;
246  AVFilterLink *outlink = ctx->outputs[out_no];
247  int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
248  int64_t nb_samples, sent = 0;
249  int frame_nb_samples, ret;
250  AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
251  AVFrame *buf;
252 
253  if (!rate_tb.den)
254  return AVERROR_BUG;
255  if (cat->in[in_no].pts < INT64_MIN + seg_delta)
256  return AVERROR_INVALIDDATA;
257  if (seg_delta < cat->in[in_no].pts)
258  return AVERROR_INVALIDDATA;
259  nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
260  outlink->time_base, rate_tb);
261  frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
262  while (nb_samples) {
263  frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
264  buf = ff_get_audio_buffer(outlink, frame_nb_samples);
265  if (!buf)
266  return AVERROR(ENOMEM);
267  av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
268  outlink->ch_layout.nb_channels, outlink->format);
269  buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
270  ret = ff_filter_frame(outlink, buf);
271  if (ret < 0)
272  return ret;
273  sent += frame_nb_samples;
274  nb_samples -= frame_nb_samples;
275  }
276  return 0;
277 }
278 
280 {
281  int ret;
282  ConcatContext *cat = ctx->priv;
283  unsigned str, str_max;
284  int64_t seg_delta;
285 
286  find_next_delta_ts(ctx, &seg_delta);
287  cat->cur_idx += ctx->nb_outputs;
288  cat->nb_in_active = ctx->nb_outputs;
289  av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
290  cat->delta_ts);
291 
292  if (cat->cur_idx < ctx->nb_inputs) {
293  /* pad audio streams with silence */
294  str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
295  str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
296  for (; str < str_max; str++) {
297  ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
298  seg_delta);
299  if (ret < 0)
300  return ret;
301  }
302  }
303  return 0;
304 }
305 
307 {
308  ConcatContext *cat = ctx->priv;
309  unsigned seg, type, str;
310  int ret;
311 
312  /* create input pads */
313  for (seg = 0; seg < cat->nb_segments; seg++) {
314  for (type = 0; type < TYPE_ALL; type++) {
315  for (str = 0; str < cat->nb_streams[type]; str++) {
316  AVFilterPad pad = {
317  .type = type,
318  };
319  if (type == AVMEDIA_TYPE_VIDEO)
321  else
323  pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
324  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
325  return ret;
326  }
327  }
328  }
329  /* create output pads */
330  for (type = 0; type < TYPE_ALL; type++) {
331  for (str = 0; str < cat->nb_streams[type]; str++) {
332  AVFilterPad pad = {
333  .type = type,
334  .config_props = config_output,
335  };
336  pad.name = av_asprintf("out:%c%d", "va"[type], str);
337  if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
338  return ret;
339  }
340  }
341 
342  cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
343  if (!cat->in)
344  return AVERROR(ENOMEM);
345  cat->nb_in_active = ctx->nb_outputs;
346  return 0;
347 }
348 
350 {
351  ConcatContext *cat = ctx->priv;
352 
353  av_freep(&cat->in);
354 }
355 
357 {
358  ConcatContext *cat = ctx->priv;
359  AVFrame *frame;
360  unsigned i, j;
361  int ret, status;
362  int64_t pts;
363 
364  /* Forward status back */
365  for (i = 0; i < ctx->nb_outputs; i++) {
366  status = ff_outlink_get_status(ctx->outputs[i]);
367  if (!status)
368  continue;
369  for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
370  if (!cat->in[j].eof) {
371  cat->in[j].eof = 1;
372  ff_inlink_set_status(ctx->inputs[j], status);
373  return 0;
374  }
375  }
376 
377  }
378 
379  /* Forward available frames */
380  if (cat->cur_idx < ctx->nb_inputs) {
381  for (i = 0; i < ctx->nb_outputs; i++) {
382  ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
383  if (ret < 0)
384  return ret;
385  if (ret) {
387  return push_frame(ctx, cat->cur_idx + i, frame);
388  }
389  }
390  }
391 
392  /* Forward status change */
393  if (cat->cur_idx < ctx->nb_inputs) {
394  for (i = 0; i < ctx->nb_outputs; i++) {
395  AVFilterLink *inlink = ctx->inputs[cat->cur_idx + i];
396 
398  /* TODO use pts */
399  if (ret > 0) {
400  close_input(ctx, cat->cur_idx + i);
401  if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
402  int64_t eof_pts = cat->delta_ts;
403 
404  eof_pts += av_rescale_q(pts, inlink->time_base, ctx->outputs[i]->time_base);
405  ff_outlink_set_status(ctx->outputs[i], status, eof_pts);
406  }
407  if (!cat->nb_in_active) {
408  ret = flush_segment(ctx);
409  if (ret < 0)
410  return ret;
411  }
413  return 0;
414  }
415  }
416  }
417 
419  for (i = 0; i < ctx->nb_outputs; i++) {
420  if (ff_outlink_frame_wanted(ctx->outputs[i])) {
421  if (cat->in[cat->cur_idx + i].eof) {
422  for (j = 0; j < ctx->nb_outputs; j++)
423  if (!cat->in[cat->cur_idx + j].eof)
424  ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
425  return 0;
426  } else {
427  ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
428  ret = 0;
429  }
430  }
431  }
432 
433  return ret;
434 }
435 
436 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
437  char *res, int res_len, int flags)
438 {
439  int ret = AVERROR(ENOSYS);
440 
441  if (!strcmp(cmd, "next")) {
442  av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
443  return flush_segment(ctx);
444  }
445 
446  return ret;
447 }
448 
450  .name = "concat",
451  .description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
452  .init = init,
453  .uninit = uninit,
454  .activate = activate,
455  .priv_size = sizeof(ConcatContext),
456  .inputs = NULL,
457  .outputs = NULL,
458  .priv_class = &concat_class,
461  .process_command = process_command,
462 };
formats
formats
Definition: signature.h:48
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:112
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:109
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1007
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:807
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:673
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:326
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:264
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:115
ConcatContext::nb_segments
unsigned nb_segments
Definition: avf_concat.c:41
activate
static int activate(AVFilterContext *ctx)
Definition: avf_concat.c:356
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
w
uint8_t w
Definition: llviddspenc.c:38
av_samples_set_silence
int av_samples_set_silence(uint8_t *const *audio_data, int offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Fill an audio buffer with silence.
Definition: samplefmt.c:246
AVOption
AVOption.
Definition: opt.h:251
ConcatContext::unsafe
unsigned unsafe
Definition: avf_concat.c:45
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
cat
#define cat(a, bpp, b)
Definition: vp9dsp_init.h:32
config_output
static int config_output(AVFilterLink *outlink)
Definition: avf_concat.c:120
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
ConcatContext::concat_in::eof
unsigned eof
Definition: avf_concat.c:49
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:323
video.h
TYPE_ALL
#define TYPE_ALL
Definition: avf_concat.c:36
flush_segment
static int flush_segment(AVFilterContext *ctx)
Definition: avf_concat.c:279
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
ff_inlink_consume_frame
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:1438
find_next_delta_ts
static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
Definition: avf_concat.c:228
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
pts
static int64_t pts
Definition: transcode_aac.c:643
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:106
ConcatContext::cur_idx
unsigned cur_idx
index of the first input of current segment
Definition: avf_concat.c:42
AVRational::num
int num
Numerator.
Definition: rational.h:59
ff_all_formats
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:535
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: avf_concat.c:75
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
ff_outlink_set_status
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
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(concat)
ff_inlink_request_frame
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1564
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:678
FF_OUTLINK_IDX
#define FF_OUTLINK_IDX(link)
Definition: internal.h:324
filters.h
ctx
AVFormatContext * ctx
Definition: movenc.c:48
nb_streams
static int nb_streams
Definition: ffprobe.c:330
av_rescale_q
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
ff_avf_concat
const AVFilter ff_avf_concat
Definition: avf_concat.c:449
frame
static AVFrame * frame
Definition: demux_decode.c:54
V
#define V
Definition: avf_concat.c:56
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
A
#define A
Definition: avf_concat.c:54
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_append_inpad_free_name
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:131
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
concat_options
static const AVOption concat_options[]
Definition: avf_concat.c:58
ff_inlink_acknowledge_status
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:1386
AVFILTER_FLAG_DYNAMIC_OUTPUTS
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:112
ConcatContext::nb_in_active
unsigned nb_in_active
number of active inputs in current segment
Definition: avf_concat.c:44
get_audio_buffer
static AVFrame * get_audio_buffer(AVFilterLink *inlink, int nb_samples)
Definition: avf_concat.c:209
ff_inlink_set_status
void ff_inlink_set_status(AVFilterLink *link, int status)
Set the status on an input link.
Definition: avfilter.c:1573
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:106
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: avf_concat.c:436
F
#define F
Definition: avf_concat.c:55
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
ConcatContext::nb_streams
unsigned nb_streams[TYPE_ALL]
number of out streams of each type
Definition: avf_concat.c:40
concat_class
static const AVClass concat_class
Definition: concatdec.c:931
ff_all_channel_layouts
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:612
internal.h
close_input
static void close_input(AVFilterContext *ctx, unsigned in_no)
Definition: avf_concat.c:218
ConcatContext::concat_in
Definition: avf_concat.c:46
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:420
AVFilterPad::get_buffer
union AVFilterPad::@253 get_buffer
Callback functions to get a video/audio buffers.
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:401
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
ConcatContext::in
struct ConcatContext::concat_in * in
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
av_rescale
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
send_silence
static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no, int64_t seg_delta)
Definition: avf_concat.c:242
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
outputs
static const AVFilterPad outputs[]
Definition: af_aap.c:310
init
static av_cold int init(AVFilterContext *ctx)
Definition: avf_concat.c:306
AVFilter
Filter definition.
Definition: avfilter.h:166
ConcatContext::concat_in::nb_frames
int64_t nb_frames
Definition: avf_concat.c:48
ConcatContext
Definition: avf_concat.c:38
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:44
AVFilterPad::video
AVFrame *(* video)(AVFilterLink *link, int w, int h)
Definition: internal.h:74
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:606
status
ov_status_e status
Definition: dnn_backend_openvino.c:120
channel_layout.h
rates
static const int rates[]
Definition: swresample.c:103
ConcatContext::concat_in::pts
int64_t pts
Definition: avf_concat.c:47
AVRational::den
int den
Denominator.
Definition: rational.h:60
FF_INLINK_IDX
#define FF_INLINK_IDX(link)
Find the index of a link.
Definition: internal.h:323
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_concat.c:349
ff_outlink_get_status
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1589
AVFilterContext
An instance of a filter.
Definition: avfilter.h:409
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
audio.h
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
AVFilterPad::audio
AVFrame *(* audio)(AVFilterLink *link, int nb_samples)
Definition: internal.h:75
ff_append_outpad_free_name
int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:142
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
ConcatContext::delta_ts
int64_t delta_ts
timestamp to add to produce output timestamps
Definition: avf_concat.c:43
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
h
h
Definition: vp9dsp_template.c:2038
ff_outlink_frame_wanted
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the ff_outlink_frame_wanted() function. If this function returns true
avstring.h
OFFSET
#define OFFSET(x)
Definition: avf_concat.c:53
get_video_buffer
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
Definition: avf_concat.c:200
ff_filter_set_ready
void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
Mark a filter ready and schedule it for activation.
Definition: avfilter.c:223
push_frame
static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
Definition: avf_concat.c:174