FFmpeg: libavfilter/avf_concat.c Source File

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"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/opt.h"
29 #include "avfilter.h"
30 #include "filters.h"
31 #include "internal.h"
32 #include "video.h"
33 #include "audio.h"
34 
35  #define TYPE_ALL 2
36 
37  typedef struct ConcatContext {
38   const AVClass *class;
39   unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
40   unsigned nb_segments;
41   unsigned cur_idx; /**< index of the first input of current segment */
42   int64_t delta_ts; /**< timestamp to add to produce output timestamps */
43   unsigned nb_in_active; /**< number of active inputs in current segment */
44   unsigned unsafe;
45   struct concat_in {
46   int64_t pts;
47   int64_t nb_frames;
48   unsigned eof;
49  } *in;
50 } ConcatContext;
51 
52  #define OFFSET(x) offsetof(ConcatContext, x)
53  #define A AV_OPT_FLAG_AUDIO_PARAM
54  #define F AV_OPT_FLAG_FILTERING_PARAM
55  #define V AV_OPT_FLAG_VIDEO_PARAM
56 
57  static const AVOption concat_options[] = {
58  { "n", "specify the number of segments", OFFSET(nb_segments),
59  AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
60  { "v", "specify the number of video streams",
61  OFFSET(nb_streams[AVMEDIA_TYPE_VIDEO]),
62  AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
63  { "a", "specify the number of audio streams",
64  OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),
65  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
66  { "unsafe", "enable unsafe mode",
67  OFFSET(unsafe),
68  AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
69  { NULL }
70 };
71 
72 AVFILTER_DEFINE_CLASS(concat);
73 
74  static int query_formats(AVFilterContext *ctx)
75 {
76  ConcatContext *cat = ctx->priv;
77  unsigned type, nb_str, idx0 = 0, idx, str, seg;
78  AVFilterFormats *formats, *rates = NULL;
79  AVFilterChannelLayouts *layouts = NULL;
80  int ret;
81 
82  for (type = 0; type < TYPE_ALL; type++) {
83  nb_str = cat->nb_streams[type];
84  for (str = 0; str < nb_str; str++) {
85  idx = idx0;
86 
87  /* Set the output formats */
88  formats = ff_all_formats(type);
89  if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->incfg.formats)) < 0)
90  return ret;
91 
92  if (type == AVMEDIA_TYPE_AUDIO) {
93  rates = ff_all_samplerates();
94  if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->incfg.samplerates)) < 0)
95  return ret;
96  layouts = ff_all_channel_layouts();
97  if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->incfg.channel_layouts)) < 0)
98  return ret;
99  }
100 
101  /* Set the same formats for each corresponding input */
102  for (seg = 0; seg < cat->nb_segments; seg++) {
103  if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->outcfg.formats)) < 0)
104  return ret;
105  if (type == AVMEDIA_TYPE_AUDIO) {
106  if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->outcfg.samplerates)) < 0 ||
107  (ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->outcfg.channel_layouts)) < 0)
108  return ret;
109  }
110  idx += ctx->nb_outputs;
111  }
112 
113  idx0++;
114  }
115  }
116  return 0;
117 }
118 
119  static int config_output(AVFilterLink *outlink)
120 {
121  AVFilterContext *ctx = outlink->src;
122  ConcatContext *cat = ctx->priv;
123  unsigned out_no = FF_OUTLINK_IDX(outlink);
124  unsigned in_no = out_no, seg;
125  AVFilterLink *inlink = ctx->inputs[in_no];
126 
127  /* enhancement: find a common one */
128  outlink->time_base = AV_TIME_BASE_Q;
129  outlink->w = inlink->w;
130  outlink->h = inlink->h;
131  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
132  outlink->format = inlink->format;
133  outlink->frame_rate = inlink->frame_rate;
134 
135  for (seg = 1; seg < cat->nb_segments; seg++) {
136  inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
137  if (outlink->frame_rate.num != inlink->frame_rate.num ||
138  outlink->frame_rate.den != inlink->frame_rate.den) {
139  av_log(ctx, AV_LOG_VERBOSE,
140  "Video inputs have different frame rates, output will be VFR\n");
141  outlink->frame_rate = av_make_q(1, 0);
142  break;
143  }
144  }
145 
146  for (seg = 1; seg < cat->nb_segments; seg++) {
147  inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
148  if (!outlink->sample_aspect_ratio.num)
149  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
150  /* possible enhancement: unsafe mode, do not check */
151  if (outlink->w != inlink->w ||
152  outlink->h != inlink->h ||
153  outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
154  inlink->sample_aspect_ratio.num ||
155  outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
156  av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
157  "(size %dx%d, SAR %d:%d) do not match the corresponding "
158  "output link %s parameters (%dx%d, SAR %d:%d)\n",
159  ctx->input_pads[in_no].name, inlink->w, inlink->h,
160  inlink->sample_aspect_ratio.num,
161  inlink->sample_aspect_ratio.den,
162  ctx->input_pads[out_no].name, outlink->w, outlink->h,
163  outlink->sample_aspect_ratio.num,
164  outlink->sample_aspect_ratio.den);
165  if (!cat->unsafe)
166  return AVERROR(EINVAL);
167  }
168  }
169 
170  return 0;
171 }
172 
173  static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
174 {
175  ConcatContext *cat = ctx->priv;
176  unsigned out_no = in_no % ctx->nb_outputs;
177  AVFilterLink * inlink = ctx-> inputs[ in_no];
178  AVFilterLink *outlink = ctx->outputs[out_no];
179  struct concat_in *in = &cat->in[in_no];
180 
181  buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
182  in->pts = buf->pts;
183  in->nb_frames++;
184  /* add duration to input PTS */
185  if (inlink->sample_rate)
186  /* use number of audio samples */
187  in->pts += av_rescale_q(buf->nb_samples,
188  av_make_q(1, inlink->sample_rate),
189  outlink->time_base);
190  else if (in->nb_frames >= 2)
191  /* use mean duration */
192  in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
193 
194  buf->pts += cat->delta_ts;
195  return ff_filter_frame(outlink, buf);
196 }
197 
198  static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
199 {
200  AVFilterContext *ctx = inlink->dst;
201  unsigned in_no = FF_INLINK_IDX(inlink);
202  AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
203 
204  return ff_get_video_buffer(outlink, w, h);
205 }
206 
207  static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
208 {
209  AVFilterContext *ctx = inlink->dst;
210  unsigned in_no = FF_INLINK_IDX(inlink);
211  AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
212 
213  return ff_get_audio_buffer(outlink, nb_samples);
214 }
215 
216  static void close_input(AVFilterContext *ctx, unsigned in_no)
217 {
218  ConcatContext *cat = ctx->priv;
219 
220  cat->in[in_no].eof = 1;
221  cat->nb_in_active--;
222  av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
223  ctx->input_pads[in_no].name, cat->nb_in_active);
224 }
225 
226  static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
227 {
228  ConcatContext *cat = ctx->priv;
229  unsigned i = cat->cur_idx;
230  unsigned imax = i + ctx->nb_outputs;
231  int64_t pts;
232 
233  pts = cat->in[i++].pts;
234  for (; i < imax; i++)
235  pts = FFMAX(pts, cat->in[i].pts);
236  cat->delta_ts += pts;
237  *seg_delta = pts;
238 }
239 
240  static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
241  int64_t seg_delta)
242 {
243  ConcatContext *cat = ctx->priv;
244  AVFilterLink *outlink = ctx->outputs[out_no];
245  int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
246  int64_t nb_samples, sent = 0;
247  int frame_nb_samples, ret;
248  AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
249  AVFrame *buf;
250 
251  if (!rate_tb.den)
252  return AVERROR_BUG;
253  if (cat->in[in_no].pts < INT64_MIN + seg_delta)
254  return AVERROR_INVALIDDATA;
255  if (seg_delta < cat->in[in_no].pts)
256  return AVERROR_INVALIDDATA;
257  nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
258  outlink->time_base, rate_tb);
259  frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
260  while (nb_samples) {
261  frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
262  buf = ff_get_audio_buffer(outlink, frame_nb_samples);
263  if (!buf)
264  return AVERROR(ENOMEM);
265  av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
266  outlink->ch_layout.nb_channels, outlink->format);
267  buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
268  ret = ff_filter_frame(outlink, buf);
269  if (ret < 0)
270  return ret;
271  sent += frame_nb_samples;
272  nb_samples -= frame_nb_samples;
273  }
274  return 0;
275 }
276 
277  static int flush_segment(AVFilterContext *ctx)
278 {
279  int ret;
280  ConcatContext *cat = ctx->priv;
281  unsigned str, str_max;
282  int64_t seg_delta;
283 
284  find_next_delta_ts(ctx, &seg_delta);
285  cat->cur_idx += ctx->nb_outputs;
286  cat->nb_in_active = ctx->nb_outputs;
287  av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
288  cat->delta_ts);
289 
290  if (cat->cur_idx < ctx->nb_inputs) {
291  /* pad audio streams with silence */
292  str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
293  str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
294  for (; str < str_max; str++) {
295  ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
296  seg_delta);
297  if (ret < 0)
298  return ret;
299  }
300  }
301  return 0;
302 }
303 
304  static av_cold int init(AVFilterContext *ctx)
305 {
306  ConcatContext *cat = ctx->priv;
307  unsigned seg, type, str;
308  int ret;
309 
310  /* create input pads */
311  for (seg = 0; seg < cat->nb_segments; seg++) {
312  for (type = 0; type < TYPE_ALL; type++) {
313  for (str = 0; str < cat->nb_streams[type]; str++) {
314  AVFilterPad pad = {
315  .type = type,
316  };
317  if (type == AVMEDIA_TYPE_VIDEO)
318  pad.get_buffer.video = get_video_buffer;
319  else
320  pad.get_buffer.audio = get_audio_buffer;
321  pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
322  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
323  return ret;
324  }
325  }
326  }
327  /* create output pads */
328  for (type = 0; type < TYPE_ALL; type++) {
329  for (str = 0; str < cat->nb_streams[type]; str++) {
330  AVFilterPad pad = {
331  .type = type,
332  .config_props = config_output,
333  };
334  pad.name = av_asprintf("out:%c%d", "va"[type], str);
335  if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
336  return ret;
337  }
338  }
339 
340  cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
341  if (!cat->in)
342  return AVERROR(ENOMEM);
343  cat->nb_in_active = ctx->nb_outputs;
344  return 0;
345 }
346 
347  static av_cold void uninit(AVFilterContext *ctx)
348 {
349  ConcatContext *cat = ctx->priv;
350 
351  av_freep(&cat->in);
352 }
353 
354  static int activate(AVFilterContext *ctx)
355 {
356  ConcatContext *cat = ctx->priv;
357  AVFrame *frame;
358  unsigned i, j;
359  int ret, status;
360  int64_t pts;
361 
362  /* Forward status back */
363  for (i = 0; i < ctx->nb_outputs; i++) {
364  status = ff_outlink_get_status(ctx->outputs[i]);
365  if (!status)
366  continue;
367  for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
368  if (!cat->in[j].eof) {
369  cat->in[j].eof = 1;
370  ff_inlink_set_status(ctx->inputs[j], status);
371  return 0;
372  }
373  }
374 
375  }
376 
377  /* Forward available frames */
378  if (cat->cur_idx < ctx->nb_inputs) {
379  for (i = 0; i < ctx->nb_outputs; i++) {
380  ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
381  if (ret < 0)
382  return ret;
383  if (ret) {
384  ff_filter_set_ready(ctx, 10);
385  return push_frame(ctx, cat->cur_idx + i, frame);
386  }
387  }
388  }
389 
390  /* Forward status change */
391  if (cat->cur_idx < ctx->nb_inputs) {
392  for (i = 0; i < ctx->nb_outputs; i++) {
393  AVFilterLink *inlink = ctx->inputs[cat->cur_idx + i];
394 
395  ret = ff_inlink_acknowledge_status(inlink, &status, &pts);
396  /* TODO use pts */
397  if (ret > 0) {
398  close_input(ctx, cat->cur_idx + i);
399  if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
400  int64_t eof_pts = cat->delta_ts;
401 
402  eof_pts += av_rescale_q(pts, inlink->time_base, ctx->outputs[i]->time_base);
403  ff_outlink_set_status(ctx->outputs[i], status, eof_pts);
404  }
405  if (!cat->nb_in_active) {
406  ret = flush_segment(ctx);
407  if (ret < 0)
408  return ret;
409  }
410  ff_filter_set_ready(ctx, 10);
411  return 0;
412  }
413  }
414  }
415 
416  ret = FFERROR_NOT_READY;
417  for (i = 0; i < ctx->nb_outputs; i++) {
418  if (ff_outlink_frame_wanted(ctx->outputs[i])) {
419  if (cat->in[cat->cur_idx + i].eof) {
420  for (j = 0; j < ctx->nb_outputs; j++)
421  if (!cat->in[cat->cur_idx + j].eof)
422  ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
423  return 0;
424  } else {
425  ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
426  ret = 0;
427  }
428  }
429  }
430 
431  return ret;
432 }
433 
434  static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
435  char *res, int res_len, int flags)
436 {
437  int ret = AVERROR(ENOSYS);
438 
439  if (!strcmp(cmd, "next")) {
440  av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
441  return flush_segment(ctx);
442  }
443 
444  return ret;
445 }
446 
447  const AVFilter ff_avf_concat = {
448  .name = "concat",
449  .description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
450  .init = init,
451  .uninit = uninit,
452  .activate = activate,
453  .priv_size = sizeof(ConcatContext),
454  .inputs = NULL,
455  .outputs = NULL,
456  .priv_class = &concat_class,
457  .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
458  FILTER_QUERY_FUNC(query_formats),
459  .process_command = process_command,
460 };
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:101
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:100
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
status
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
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:999
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:591
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:330
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:260
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:116
ConcatContext::nb_segments
unsigned nb_segments
Definition: avf_concat.c:40
activate
static int activate(AVFilterContext *ctx)
Definition: avf_concat.c:354
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:432
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:251
ConcatContext::unsafe
unsigned unsafe
Definition: avf_concat.c:44
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:167
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:119
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
ConcatContext::concat_in::eof
unsigned eof
Definition: avf_concat.c:48
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
video.h
TYPE_ALL
#define TYPE_ALL
Definition: avf_concat.c:35
flush_segment
static int flush_segment(AVFilterContext *ctx)
Definition: avf_concat.c:277
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
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:1394
find_next_delta_ts
static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
Definition: avf_concat.c:226
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:654
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:116
ConcatContext::cur_idx
unsigned cur_idx
index of the first input of current segment
Definition: avf_concat.c:41
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:480
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: avf_concat.c:74
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:1511
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:596
FF_OUTLINK_IDX
#define FF_OUTLINK_IDX(link)
Definition: internal.h:334
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:172
filters.h
ctx
AVFormatContext * ctx
Definition: movenc.c:48
nb_streams
static int nb_streams
Definition: ffprobe.c:307
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:447
V
#define V
Definition: avf_concat.c:55
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:53
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:123
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:57
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:1348
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:122
ConcatContext::nb_in_active
unsigned nb_in_active
number of active inputs in current segment
Definition: avf_concat.c:43
get_audio_buffer
static AVFrame * get_audio_buffer(AVFilterLink *inlink, int nb_samples)
Definition: avf_concat.c:207
ff_inlink_set_status
void ff_inlink_set_status(AVFilterLink *link, int status)
Set the status on an input link.
Definition: avfilter.c:1519
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:117
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:434
F
#define F
Definition: avf_concat.c:54
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:39
concat_class
static const AVClass concat_class
Definition: concatdec.c:928
ff_all_channel_layouts
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:557
internal.h
close_input
static void close_input(AVFilterContext *ctx, unsigned in_no)
Definition: avf_concat.c:216
ConcatContext::concat_in
Definition: avf_concat.c:45
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:405
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:386
AVFilterPad::get_buffer
union AVFilterPad::@214 get_buffer
Callback functions to get a video/audio buffers.
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:55
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:240
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
init
static av_cold int init(AVFilterContext *ctx)
Definition: avf_concat.c:304
av_samples_set_silence
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:246
AVFilter
Filter definition.
Definition: avfilter.h:171
ConcatContext::concat_in::nb_frames
int64_t nb_frames
Definition: avf_concat.c:47
ConcatContext
Definition: avf_concat.c:37
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:60
frame
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AVFilterPad::video
AVFrame *(* video)(AVFilterLink *link, int w, int h)
Definition: internal.h:90
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:551
channel_layout.h
rates
static const int rates[]
Definition: swresample.c:103
ConcatContext::concat_in::pts
int64_t pts
Definition: avf_concat.c:46
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:333
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:347
ff_outlink_get_status
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1534
AVFilterContext
An instance of a filter.
Definition: avfilter.h:408
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:91
ff_append_outpad_free_name
int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:134
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
convert_header.str
string str
Definition: convert_header.py:20
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
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:42
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:52
get_video_buffer
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
Definition: avf_concat.c:198
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:191
push_frame
static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
Definition: avf_concat.c:173
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