FFmpeg  4.3
avisynth.c
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1 /*
2  * AviSynth(+) support
3  * Copyright (c) 2012 AvxSynth Team
4  *
5  * This file is part of FFmpeg
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/internal.h"
24 
25 #include "libavcodec/internal.h"
26 
27 #include "avformat.h"
28 #include "internal.h"
29 #include "config.h"
30 
31 /* Enable function pointer definitions for runtime loading. */
32 #define AVSC_NO_DECLSPEC
33 
34 /* Platform-specific directives. */
35 #ifdef _WIN32
36  #include "compat/w32dlfcn.h"
37  #undef EXTERN_C
38  #define AVISYNTH_LIB "avisynth"
39 #else
40  #include <dlfcn.h>
41  #define AVISYNTH_NAME "libavisynth"
42  #define AVISYNTH_LIB AVISYNTH_NAME SLIBSUF
43 #endif
44 
45 #include <avisynth/avisynth_c.h>
46 
47 typedef struct AviSynthLibrary {
48  void *library;
49 #define AVSC_DECLARE_FUNC(name) name ## _func name
50  AVSC_DECLARE_FUNC(avs_bit_blt);
51  AVSC_DECLARE_FUNC(avs_clip_get_error);
52  AVSC_DECLARE_FUNC(avs_create_script_environment);
53  AVSC_DECLARE_FUNC(avs_delete_script_environment);
54  AVSC_DECLARE_FUNC(avs_get_audio);
55  AVSC_DECLARE_FUNC(avs_get_error);
56  AVSC_DECLARE_FUNC(avs_get_frame);
57  AVSC_DECLARE_FUNC(avs_get_version);
58  AVSC_DECLARE_FUNC(avs_get_video_info);
59  AVSC_DECLARE_FUNC(avs_invoke);
60  AVSC_DECLARE_FUNC(avs_release_clip);
61  AVSC_DECLARE_FUNC(avs_release_value);
62  AVSC_DECLARE_FUNC(avs_release_video_frame);
63  AVSC_DECLARE_FUNC(avs_take_clip);
64  AVSC_DECLARE_FUNC(avs_bits_per_pixel);
65  AVSC_DECLARE_FUNC(avs_get_height_p);
66  AVSC_DECLARE_FUNC(avs_get_pitch_p);
67  AVSC_DECLARE_FUNC(avs_get_read_ptr_p);
68  AVSC_DECLARE_FUNC(avs_get_row_size_p);
69  AVSC_DECLARE_FUNC(avs_is_planar_rgb);
70  AVSC_DECLARE_FUNC(avs_is_planar_rgba);
71 #undef AVSC_DECLARE_FUNC
73 
74 typedef struct AviSynthContext {
75  AVS_ScriptEnvironment *env;
76  AVS_Clip *clip;
77  const AVS_VideoInfo *vi;
78 
79  /* avisynth_read_packet_video() iterates over this. */
80  int n_planes;
81  const int *planes;
82 
85  int64_t curr_sample;
86 
87  int error;
88 
89  /* Linked list pointers. */
92 
93 static const int avs_planes_packed[1] = { 0 };
94 static const int avs_planes_grey[1] = { AVS_PLANAR_Y };
95 static const int avs_planes_yuv[3] = { AVS_PLANAR_Y, AVS_PLANAR_U,
96  AVS_PLANAR_V };
97 static const int avs_planes_rgb[3] = { AVS_PLANAR_G, AVS_PLANAR_B,
98  AVS_PLANAR_R };
99 static const int avs_planes_yuva[4] = { AVS_PLANAR_Y, AVS_PLANAR_U,
100  AVS_PLANAR_V, AVS_PLANAR_A };
101 static const int avs_planes_rgba[4] = { AVS_PLANAR_G, AVS_PLANAR_B,
102  AVS_PLANAR_R, AVS_PLANAR_A };
103 
104 /* A conflict between C++ global objects, atexit, and dynamic loading requires
105  * us to register our own atexit handler to prevent double freeing. */
107 static int avs_atexit_called = 0;
108 
109 /* Linked list of AviSynthContexts. An atexit handler destroys this list. */
111 
112 static av_cold void avisynth_atexit_handler(void);
113 
115 {
116  avs_library.library = dlopen(AVISYNTH_LIB, RTLD_NOW | RTLD_LOCAL);
117  if (!avs_library.library)
118  return AVERROR_UNKNOWN;
119 
120 #define LOAD_AVS_FUNC(name, continue_on_fail) \
121  avs_library.name = (name ## _func) \
122  dlsym(avs_library.library, #name); \
123  if (!continue_on_fail && !avs_library.name) \
124  goto fail;
125 
126  LOAD_AVS_FUNC(avs_bit_blt, 0);
127  LOAD_AVS_FUNC(avs_clip_get_error, 0);
128  LOAD_AVS_FUNC(avs_create_script_environment, 0);
129  LOAD_AVS_FUNC(avs_delete_script_environment, 0);
130  LOAD_AVS_FUNC(avs_get_audio, 0);
131  LOAD_AVS_FUNC(avs_get_error, 1); // New to AviSynth 2.6
132  LOAD_AVS_FUNC(avs_get_frame, 0);
133  LOAD_AVS_FUNC(avs_get_version, 0);
134  LOAD_AVS_FUNC(avs_get_video_info, 0);
135  LOAD_AVS_FUNC(avs_invoke, 0);
136  LOAD_AVS_FUNC(avs_release_clip, 0);
137  LOAD_AVS_FUNC(avs_release_value, 0);
138  LOAD_AVS_FUNC(avs_release_video_frame, 0);
139  LOAD_AVS_FUNC(avs_take_clip, 0);
140  LOAD_AVS_FUNC(avs_bits_per_pixel, 1);
141  LOAD_AVS_FUNC(avs_get_height_p, 1);
142  LOAD_AVS_FUNC(avs_get_pitch_p, 1);
143  LOAD_AVS_FUNC(avs_get_read_ptr_p, 1);
144  LOAD_AVS_FUNC(avs_get_row_size_p, 1);
145  LOAD_AVS_FUNC(avs_is_planar_rgb, 1);
146  LOAD_AVS_FUNC(avs_is_planar_rgba, 1);
147 #undef LOAD_AVS_FUNC
148 
149  atexit(avisynth_atexit_handler);
150  return 0;
151 
152 fail:
153  dlclose(avs_library.library);
154  return AVERROR_UNKNOWN;
155 }
156 
157 /* Note that avisynth_context_create and avisynth_context_destroy
158  * do not allocate or free the actual context! That is taken care of
159  * by libavformat. */
161 {
162  AviSynthContext *avs = s->priv_data;
163  int ret;
164 
165  if (!avs_library.library)
166  if (ret = avisynth_load_library())
167  return ret;
168 
169  avs->env = avs_library.avs_create_script_environment(3);
170  if (avs_library.avs_get_error) {
171  const char *error = avs_library.avs_get_error(avs->env);
172  if (error) {
173  av_log(s, AV_LOG_ERROR, "%s\n", error);
174  return AVERROR_UNKNOWN;
175  }
176  }
177 
178  if (!avs_ctx_list) {
179  avs_ctx_list = avs;
180  } else {
181  avs->next = avs_ctx_list;
182  avs_ctx_list = avs;
183  }
184 
185  return 0;
186 }
187 
189 {
190  if (avs_atexit_called)
191  return;
192 
193  if (avs == avs_ctx_list) {
194  avs_ctx_list = avs->next;
195  } else {
197  while (prev->next != avs)
198  prev = prev->next;
199  prev->next = avs->next;
200  }
201 
202  if (avs->clip) {
203  avs_library.avs_release_clip(avs->clip);
204  avs->clip = NULL;
205  }
206  if (avs->env) {
207  avs_library.avs_delete_script_environment(avs->env);
208  avs->env = NULL;
209  }
210 }
211 
213 {
215 
216  while (avs) {
217  AviSynthContext *next = avs->next;
219  avs = next;
220  }
221  dlclose(avs_library.library);
222 
223  avs_atexit_called = 1;
224 }
225 
226 /* Create AVStream from audio and video data. */
228 {
229  AviSynthContext *avs = s->priv_data;
230  int planar = 0; // 0: packed, 1: YUV, 2: Y8, 3: Planar RGB, 4: YUVA, 5: Planar RGBA
231 
234  st->codecpar->width = avs->vi->width;
235  st->codecpar->height = avs->vi->height;
236 
237  st->avg_frame_rate = (AVRational) { avs->vi->fps_numerator,
238  avs->vi->fps_denominator };
239  st->start_time = 0;
240  st->duration = avs->vi->num_frames;
241  st->nb_frames = avs->vi->num_frames;
242  avpriv_set_pts_info(st, 32, avs->vi->fps_denominator, avs->vi->fps_numerator);
243 
244  switch (avs->vi->pixel_type) {
245  /* 10~16-bit YUV pix_fmts (AviSynth+) */
246  case AVS_CS_YUV444P10:
248  planar = 1;
249  break;
250  case AVS_CS_YUV422P10:
252  planar = 1;
253  break;
254  case AVS_CS_YUV420P10:
256  planar = 1;
257  break;
258  case AVS_CS_YUV444P12:
260  planar = 1;
261  break;
262  case AVS_CS_YUV422P12:
264  planar = 1;
265  break;
266  case AVS_CS_YUV420P12:
268  planar = 1;
269  break;
270  case AVS_CS_YUV444P14:
272  planar = 1;
273  break;
274  case AVS_CS_YUV422P14:
276  planar = 1;
277  break;
278  case AVS_CS_YUV420P14:
280  planar = 1;
281  break;
282  case AVS_CS_YUV444P16:
284  planar = 1;
285  break;
286  case AVS_CS_YUV422P16:
288  planar = 1;
289  break;
290  case AVS_CS_YUV420P16:
292  planar = 1;
293  break;
294  /* 8~16-bit YUV pix_fmts with Alpha (AviSynth+) */
295  case AVS_CS_YUVA444:
297  planar = 4;
298  break;
299  case AVS_CS_YUVA422:
301  planar = 4;
302  break;
303  case AVS_CS_YUVA420:
305  planar = 4;
306  break;
307  case AVS_CS_YUVA444P10:
309  planar = 4;
310  break;
311  case AVS_CS_YUVA422P10:
313  planar = 4;
314  break;
315  case AVS_CS_YUVA420P10:
317  planar = 4;
318  break;
319  case AVS_CS_YUVA422P12:
321  planar = 4;
322  break;
323  case AVS_CS_YUVA444P16:
325  planar = 4;
326  break;
327  case AVS_CS_YUVA422P16:
329  planar = 4;
330  break;
331  case AVS_CS_YUVA420P16:
333  planar = 4;
334  break;
335  /* Planar RGB pix_fmts (AviSynth+) */
336  case AVS_CS_RGBP:
338  planar = 3;
339  break;
340  case AVS_CS_RGBP10:
342  planar = 3;
343  break;
344  case AVS_CS_RGBP12:
346  planar = 3;
347  break;
348  case AVS_CS_RGBP14:
350  planar = 3;
351  break;
352  case AVS_CS_RGBP16:
354  planar = 3;
355  break;
356  /* Single precision floating point Planar RGB (AviSynth+) */
357  case AVS_CS_RGBPS:
359  planar = 3;
360  break;
361  /* Planar RGB pix_fmts with Alpha (AviSynth+) */
362  case AVS_CS_RGBAP:
364  planar = 5;
365  break;
366  case AVS_CS_RGBAP10:
368  planar = 5;
369  break;
370  case AVS_CS_RGBAP12:
372  planar = 5;
373  break;
374  case AVS_CS_RGBAP16:
376  planar = 5;
377  break;
378  /* Single precision floating point Planar RGB with Alpha (AviSynth+) */
379  case AVS_CS_RGBAPS:
381  planar = 5;
382  break;
383  /* 10~16-bit gray pix_fmts (AviSynth+) */
384  case AVS_CS_Y10:
386  planar = 2;
387  break;
388  case AVS_CS_Y12:
390  planar = 2;
391  break;
392  case AVS_CS_Y14:
394  planar = 2;
395  break;
396  case AVS_CS_Y16:
398  planar = 2;
399  break;
400  /* Single precision floating point gray (AviSynth+) */
401  case AVS_CS_Y32:
403  planar = 2;
404  break;
405  /* pix_fmts added in AviSynth 2.6 */
406  case AVS_CS_YV24:
408  planar = 1;
409  break;
410  case AVS_CS_YV16:
412  planar = 1;
413  break;
414  case AVS_CS_YV411:
416  planar = 1;
417  break;
418  case AVS_CS_Y8:
420  planar = 2;
421  break;
422  /* 16-bit packed RGB pix_fmts (AviSynth+) */
423  case AVS_CS_BGR48:
425  break;
426  case AVS_CS_BGR64:
428  break;
429  /* AviSynth 2.5 pix_fmts */
430  case AVS_CS_BGR24:
432  break;
433  case AVS_CS_BGR32:
435  break;
436  case AVS_CS_YUY2:
438  break;
439  case AVS_CS_YV12:
441  planar = 1;
442  break;
443  case AVS_CS_I420: // Is this even used anywhere?
445  planar = 1;
446  break;
447  default:
448  av_log(s, AV_LOG_ERROR,
449  "unknown AviSynth colorspace %d\n", avs->vi->pixel_type);
450  avs->error = 1;
451  return AVERROR_UNKNOWN;
452  }
453 
454  switch (planar) {
455  case 5: // Planar RGB + Alpha
456  avs->n_planes = 4;
457  avs->planes = avs_planes_rgba;
458  break;
459  case 4: // YUV + Alpha
460  avs->n_planes = 4;
461  avs->planes = avs_planes_yuva;
462  break;
463  case 3: // Planar RGB
464  avs->n_planes = 3;
465  avs->planes = avs_planes_rgb;
466  break;
467  case 2: // Y8
468  avs->n_planes = 1;
469  avs->planes = avs_planes_grey;
470  break;
471  case 1: // YUV
472  avs->n_planes = 3;
473  avs->planes = avs_planes_yuv;
474  break;
475  default:
476  avs->n_planes = 1;
477  avs->planes = avs_planes_packed;
478  }
479  return 0;
480 }
481 
483 {
484  AviSynthContext *avs = s->priv_data;
485 
487  st->codecpar->sample_rate = avs->vi->audio_samples_per_second;
488  st->codecpar->channels = avs->vi->nchannels;
489  st->duration = avs->vi->num_audio_samples;
490  avpriv_set_pts_info(st, 64, 1, avs->vi->audio_samples_per_second);
491 
492  switch (avs->vi->sample_type) {
493  case AVS_SAMPLE_INT8:
495  break;
496  case AVS_SAMPLE_INT16:
498  break;
499  case AVS_SAMPLE_INT24:
501  break;
502  case AVS_SAMPLE_INT32:
504  break;
505  case AVS_SAMPLE_FLOAT:
507  break;
508  default:
509  av_log(s, AV_LOG_ERROR,
510  "unknown AviSynth sample type %d\n", avs->vi->sample_type);
511  avs->error = 1;
512  return AVERROR_UNKNOWN;
513  }
514  return 0;
515 }
516 
518 {
519  AviSynthContext *avs = s->priv_data;
520  AVStream *st;
521  int ret;
522  int id = 0;
523 
524  if (avs_has_video(avs->vi)) {
525  st = avformat_new_stream(s, NULL);
526  if (!st)
527  return AVERROR_UNKNOWN;
528  st->id = id++;
529  if (ret = avisynth_create_stream_video(s, st))
530  return ret;
531  }
532  if (avs_has_audio(avs->vi)) {
533  st = avformat_new_stream(s, NULL);
534  if (!st)
535  return AVERROR_UNKNOWN;
536  st->id = id++;
537  if (ret = avisynth_create_stream_audio(s, st))
538  return ret;
539  }
540  return 0;
541 }
542 
544 {
545  AviSynthContext *avs = s->priv_data;
546  AVS_Value arg, val;
547  int ret;
548 #ifdef _WIN32
549  char filename_ansi[MAX_PATH * 4];
550  wchar_t filename_wc[MAX_PATH * 4];
551 #endif
552 
553  if (ret = avisynth_context_create(s))
554  return ret;
555 
556 #ifdef _WIN32
557  /* Convert UTF-8 to ANSI code page */
558  MultiByteToWideChar(CP_UTF8, 0, s->url, -1, filename_wc, MAX_PATH * 4);
559  WideCharToMultiByte(CP_THREAD_ACP, 0, filename_wc, -1, filename_ansi,
560  MAX_PATH * 4, NULL, NULL);
561  arg = avs_new_value_string(filename_ansi);
562 #else
563  arg = avs_new_value_string(s->url);
564 #endif
565  val = avs_library.avs_invoke(avs->env, "Import", arg, 0);
566  if (avs_is_error(val)) {
567  av_log(s, AV_LOG_ERROR, "%s\n", avs_as_error(val));
568  ret = AVERROR_UNKNOWN;
569  goto fail;
570  }
571  if (!avs_is_clip(val)) {
572  av_log(s, AV_LOG_ERROR, "AviSynth script did not return a clip\n");
573  ret = AVERROR_UNKNOWN;
574  goto fail;
575  }
576 
577  avs->clip = avs_library.avs_take_clip(val, avs->env);
578  avs->vi = avs_library.avs_get_video_info(avs->clip);
579 
580  /* On Windows, FFmpeg supports AviSynth interface version 6 or higher.
581  * This includes AviSynth 2.6 RC1 or higher, and AviSynth+ r1718 or higher,
582  * and excludes 2.5 and the 2.6 alphas. */
583 
584  if (avs_library.avs_get_version(avs->clip) < 6) {
585  av_log(s, AV_LOG_ERROR,
586  "AviSynth version is too old. Please upgrade to either AviSynth 2.6 >= RC1 or AviSynth+ >= r1718.\n");
587  ret = AVERROR_UNKNOWN;
588  goto fail;
589  }
590 
591  /* Release the AVS_Value as it will go out of scope. */
592  avs_library.avs_release_value(val);
593 
594  if (ret = avisynth_create_stream(s))
595  goto fail;
596 
597  return 0;
598 
599 fail:
601  return ret;
602 }
603 
605  AVPacket *pkt, int *discard)
606 {
607  AviSynthContext *avs = s->priv_data;
608 
609  avs->curr_stream++;
610  avs->curr_stream %= s->nb_streams;
611 
612  *st = s->streams[avs->curr_stream];
613  if ((*st)->discard == AVDISCARD_ALL)
614  *discard = 1;
615  else
616  *discard = 0;
617 
618  return;
619 }
620 
621 /* Copy AviSynth clip data into an AVPacket. */
623  int discard)
624 {
625  AviSynthContext *avs = s->priv_data;
626  AVS_VideoFrame *frame;
627  unsigned char *dst_p;
628  const unsigned char *src_p;
629  int n, i, plane, rowsize, planeheight, pitch, bits, ret;
630  const char *error;
631  int avsplus av_unused;
632 
633  if (avs->curr_frame >= avs->vi->num_frames)
634  return AVERROR_EOF;
635 
636  /* This must happen even if the stream is discarded to prevent desync. */
637  n = avs->curr_frame++;
638  if (discard)
639  return 0;
640 
641 #ifdef _WIN32
642  /* Detect whether we're using AviSynth 2.6 or AviSynth+ by
643  * looking for whether avs_is_planar_rgb exists. */
644  if (GetProcAddress(avs_library.library, "avs_is_planar_rgb") == NULL)
645  avsplus = 0;
646  else
647  avsplus = 1;
648 #else
649  /* AviSynth+ is now the only variant of AviSynth we support
650  * on Linux and macOS. */
651  avsplus = 1;
652 #endif
653 
654  bits = avs_library.avs_bits_per_pixel(avs->vi);
655 
656  /* Without the cast to int64_t, calculation overflows at about 9k x 9k
657  * resolution. */
658  pkt->size = (((int64_t)avs->vi->width *
659  (int64_t)avs->vi->height) * bits) / 8;
660  if (!pkt->size)
661  return AVERROR_UNKNOWN;
662 
663  if ((ret = av_new_packet(pkt, pkt->size)) < 0)
664  return ret;
665 
666  pkt->pts = n;
667  pkt->dts = n;
668  pkt->duration = 1;
669  pkt->stream_index = avs->curr_stream;
670 
671  frame = avs_library.avs_get_frame(avs->clip, n);
672  error = avs_library.avs_clip_get_error(avs->clip);
673  if (error) {
674  av_log(s, AV_LOG_ERROR, "%s\n", error);
675  avs->error = 1;
676  av_packet_unref(pkt);
677  return AVERROR_UNKNOWN;
678  }
679 
680  dst_p = pkt->data;
681  for (i = 0; i < avs->n_planes; i++) {
682  plane = avs->planes[i];
683  src_p = avs_library.avs_get_read_ptr_p(frame, plane);
684  pitch = avs_library.avs_get_pitch_p(frame, plane);
685 
686  rowsize = avs_library.avs_get_row_size_p(frame, plane);
687  planeheight = avs_library.avs_get_height_p(frame, plane);
688 
689  /* Flip RGB video. */
690  if (avs_is_rgb24(avs->vi) || avs_is_rgb(avs->vi)) {
691  src_p = src_p + (planeheight - 1) * pitch;
692  pitch = -pitch;
693  }
694 
695  /* Flip Planar RGB video */
696  if (avsplus && (avs_library.avs_is_planar_rgb(avs->vi) ||
697  avs_library.avs_is_planar_rgba(avs->vi))) {
698  src_p = src_p + (planeheight - 1) * pitch;
699  pitch = -pitch;
700  }
701 
702  avs_library.avs_bit_blt(avs->env, dst_p, rowsize, src_p, pitch,
703  rowsize, planeheight);
704  dst_p += rowsize * planeheight;
705  }
706 
707  avs_library.avs_release_video_frame(frame);
708  return 0;
709 }
710 
712  int discard)
713 {
714  AviSynthContext *avs = s->priv_data;
715  AVRational fps, samplerate;
716  int samples, ret;
717  int64_t n;
718  const char *error;
719 
720  if (avs->curr_sample >= avs->vi->num_audio_samples)
721  return AVERROR_EOF;
722 
723  fps.num = avs->vi->fps_numerator;
724  fps.den = avs->vi->fps_denominator;
725  samplerate.num = avs->vi->audio_samples_per_second;
726  samplerate.den = 1;
727 
728  if (avs_has_video(avs->vi)) {
729  if (avs->curr_frame < avs->vi->num_frames)
730  samples = av_rescale_q(avs->curr_frame, samplerate, fps) -
731  avs->curr_sample;
732  else
733  samples = av_rescale_q(1, samplerate, fps);
734  } else {
735  samples = 1000;
736  }
737 
738  /* After seeking, audio may catch up with video. */
739  if (samples <= 0) {
740  pkt->size = 0;
741  pkt->data = NULL;
742  return 0;
743  }
744 
745  if (avs->curr_sample + samples > avs->vi->num_audio_samples)
746  samples = avs->vi->num_audio_samples - avs->curr_sample;
747 
748  /* This must happen even if the stream is discarded to prevent desync. */
749  n = avs->curr_sample;
750  avs->curr_sample += samples;
751  if (discard)
752  return 0;
753 
754  pkt->size = avs_bytes_per_channel_sample(avs->vi) *
755  samples * avs->vi->nchannels;
756  if (!pkt->size)
757  return AVERROR_UNKNOWN;
758 
759  if ((ret = av_new_packet(pkt, pkt->size)) < 0)
760  return ret;
761 
762  pkt->pts = n;
763  pkt->dts = n;
764  pkt->duration = samples;
765  pkt->stream_index = avs->curr_stream;
766 
767  avs_library.avs_get_audio(avs->clip, pkt->data, n, samples);
768  error = avs_library.avs_clip_get_error(avs->clip);
769  if (error) {
770  av_log(s, AV_LOG_ERROR, "%s\n", error);
771  avs->error = 1;
772  av_packet_unref(pkt);
773  return AVERROR_UNKNOWN;
774  }
775  return 0;
776 }
777 
779 {
780  int ret;
781 
782  // Calling library must implement a lock for thread-safe opens.
783  if (ret = ff_lock_avformat())
784  return ret;
785 
786  if (ret = avisynth_open_file(s)) {
788  return ret;
789  }
790 
792  return 0;
793 }
794 
796 {
797  AviSynthContext *avs = s->priv_data;
798  AVStream *st;
799  int discard = 0;
800  int ret;
801 
802  if (avs->error)
803  return AVERROR_UNKNOWN;
804 
805  /* If either stream reaches EOF, try to read the other one before
806  * giving up. */
807  avisynth_next_stream(s, &st, pkt, &discard);
808  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
809  ret = avisynth_read_packet_video(s, pkt, discard);
810  if (ret == AVERROR_EOF && avs_has_audio(avs->vi)) {
811  avisynth_next_stream(s, &st, pkt, &discard);
812  return avisynth_read_packet_audio(s, pkt, discard);
813  }
814  } else {
815  ret = avisynth_read_packet_audio(s, pkt, discard);
816  if (ret == AVERROR_EOF && avs_has_video(avs->vi)) {
817  avisynth_next_stream(s, &st, pkt, &discard);
818  return avisynth_read_packet_video(s, pkt, discard);
819  }
820  }
821 
822  return ret;
823 }
824 
826 {
827  if (ff_lock_avformat())
828  return AVERROR_UNKNOWN;
829 
832  return 0;
833 }
834 
835 static int avisynth_read_seek(AVFormatContext *s, int stream_index,
836  int64_t timestamp, int flags)
837 {
838  AviSynthContext *avs = s->priv_data;
839  AVStream *st;
840  AVRational fps, samplerate;
841 
842  if (avs->error)
843  return AVERROR_UNKNOWN;
844 
845  fps = (AVRational) { avs->vi->fps_numerator,
846  avs->vi->fps_denominator };
847  samplerate = (AVRational) { avs->vi->audio_samples_per_second, 1 };
848 
849  st = s->streams[stream_index];
850  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
851  /* AviSynth frame counts are signed int. */
852  if ((timestamp >= avs->vi->num_frames) ||
853  (timestamp > INT_MAX) ||
854  (timestamp < 0))
855  return AVERROR_EOF;
856  avs->curr_frame = timestamp;
857  if (avs_has_audio(avs->vi))
858  avs->curr_sample = av_rescale_q(timestamp, samplerate, fps);
859  } else {
860  if ((timestamp >= avs->vi->num_audio_samples) || (timestamp < 0))
861  return AVERROR_EOF;
862  /* Force frame granularity for seeking. */
863  if (avs_has_video(avs->vi)) {
864  avs->curr_frame = av_rescale_q(timestamp, fps, samplerate);
865  avs->curr_sample = av_rescale_q(avs->curr_frame, samplerate, fps);
866  } else {
867  avs->curr_sample = timestamp;
868  }
869  }
870 
871  return 0;
872 }
873 
875  .name = "avisynth",
876  .long_name = NULL_IF_CONFIG_SMALL("AviSynth script"),
877  .priv_data_size = sizeof(AviSynthContext),
882  .extensions = "avs",
883 };
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:440
static int avs_atexit_called
Definition: avisynth.c:107
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:434
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:407
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:417
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:435
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
int num
Numerator.
Definition: rational.h:59
int size
Definition: packet.h:356
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:413
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:392
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:401
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi - 0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64, *(const int64_t *) pi *(1.0f/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64, *(const int64_t *) pi *(1.0/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(UINT64_C(1)<< 63))) #define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={ FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64), };static void cpy1(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, len);} static void cpy2(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 2 *len);} static void cpy4(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 4 *len);} static void cpy8(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 8 *len);} AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags) { AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){ in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);} ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map) { switch(av_get_bytes_per_sample(in_fmt)){ case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;} } if(HAVE_X86ASM &&HAVE_MMX) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);return ctx;} void swri_audio_convert_free(AudioConvert **ctx) { av_freep(ctx);} int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len) { int ch;int off=0;const int os=(out->planar ? 1 :out->ch_count) *out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask) { int planes=in->planar ? in->ch_count :1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;} if(ctx->out_simd_align_mask) { int planes=out->planar ? out->ch_count :1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;} if(ctx->simd_f &&!ctx->ch_map &&!misaligned){ off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){ if(out->planar==in->planar){ int planes=out->planar ? out->ch_count :1;for(ch=0;ch< planes;ch++){ ctx->simd_f(out-> ch const uint8_t **in ch off *out planar
Definition: audioconvert.c:56
discard all
Definition: avcodec.h:236
static AVPacket pkt
static void error(const char *err)
Macro definitions for various function/variable attributes.
static const int avs_planes_yuv[3]
Definition: avisynth.c:95
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:378
Format I/O context.
Definition: avformat.h:1351
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:379
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
static int avisynth_read_packet_audio(AVFormatContext *s, AVPacket *pkt, int discard)
Definition: avisynth.c:711
#define av_cold
Definition: attributes.h:88
int width
Video only.
Definition: codec_par.h:126
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
int id
Format-specific stream ID.
Definition: avformat.h:883
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static AVFrame * frame
uint8_t * data
Definition: packet.h:355
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_PIX_FMT_BGR48
Definition: pixfmt.h:388
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:410
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:402
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:439
#define av_log(a,...)
static av_cold int avisynth_read_close(AVFormatContext *s)
Definition: avisynth.c:825
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
#define AVISYNTH_LIB
Definition: avisynth.c:42
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
char * url
input or output URL.
Definition: avformat.h:1447
const int * planes
Definition: avisynth.c:81
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:441
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:418
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:400
uint8_t bits
Definition: vp3data.h:202
static int avisynth_read_packet_video(AVFormatContext *s, AVPacket *pkt, int discard)
Definition: avisynth.c:622
AVInputFormat ff_avisynth_demuxer
Definition: avisynth.c:874
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
static const int avs_planes_yuva[4]
Definition: avisynth.c:99
#define fail()
Definition: checkasm.h:123
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:419
AVS_ScriptEnvironment * env
Definition: avisynth.c:75
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
static AviSynthLibrary avs_library
Definition: avisynth.c:106
static const int avs_planes_rgba[4]
Definition: avisynth.c:101
AVSC_DECLARE_FUNC(avs_bit_blt)
static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: avisynth.c:795
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:416
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:381
AVS_Clip * clip
Definition: avisynth.c:76
static int avisynth_create_stream_video(AVFormatContext *s, AVStream *st)
Definition: avisynth.c:227
int ff_unlock_avformat(void)
Definition: utils.c:83
static const int avs_planes_grey[1]
Definition: avisynth.c:94
#define s(width, name)
Definition: cbs_vp9.c:257
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:415
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:408
static int avisynth_create_stream_audio(AVFormatContext *s, AVStream *st)
Definition: avisynth.c:482
static av_cold void avisynth_atexit_handler(void)
Definition: avisynth.c:212
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:405
#define AV_PIX_FMT_GRAYF32
Definition: pixfmt.h:429
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:380
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:370
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:67
void * library
Definition: avisynth.c:48
static const int avs_planes_rgb[3]
Definition: avisynth.c:97
#define LOAD_AVS_FUNC(name, continue_on_fail)
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:397
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int avisynth_create_stream(AVFormatContext *s)
Definition: avisynth.c:517
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:406
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:414
const AVS_VideoInfo * vi
Definition: avisynth.c:77
#define flags(name, subs,...)
Definition: cbs_av1.c:564
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:404
static int avisynth_open_file(AVFormatContext *s)
Definition: avisynth.c:543
static av_cold int avisynth_load_library(void)
Definition: avisynth.c:114
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AV_PIX_FMT_GBRPF32
Definition: pixfmt.h:426
Main libavformat public API header.
static int avisynth_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: avisynth.c:835
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
#define AV_PIX_FMT_GBRAPF32
Definition: pixfmt.h:427
common internal api header.
static AviSynthContext * avs_ctx_list
Definition: avisynth.c:110
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:915
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:927
int den
Denominator.
Definition: rational.h:60
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
struct AviSynthContext * next
Definition: avisynth.c:90
void * priv_data
Format private data.
Definition: avformat.h:1379
int channels
Audio only.
Definition: codec_par.h:166
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
static av_cold int avisynth_context_create(AVFormatContext *s)
Definition: avisynth.c:160
int ff_lock_avformat(void)
Definition: utils.c:78
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
static const int avs_planes_packed[1]
Definition: avisynth.c:93
static av_cold void avisynth_context_destroy(AviSynthContext *avs)
Definition: avisynth.c:188
int stream_index
Definition: packet.h:357
static av_cold int avisynth_read_header(AVFormatContext *s)
Definition: avisynth.c:778
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:332
static void avisynth_next_stream(AVFormatContext *s, AVStream **st, AVPacket *pkt, int *discard)
Definition: avisynth.c:604
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:409
int64_t curr_sample
Definition: avisynth.c:85
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
#define av_unused
Definition: attributes.h:131
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:437