FFmpeg
vapoursynth.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20 * @file
21 * VapourSynth demuxer
22 *
23 * Synthesizes vapour (?)
24 */
25 
26 #include <limits.h>
27 
28 #include <vapoursynth/VSScript4.h>
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/eval.h"
33 #include "libavutil/frame.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/mem.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "avformat.h"
39 #include "demux.h"
40 #include "internal.h"
41 
42 /* Platform-specific directives. */
43 #ifdef _WIN32
44  #include <windows.h>
45  #include "compat/w32dlfcn.h"
46  #include "libavutil/wchar_filename.h"
47  #undef EXTERN_C
48  #define VSSCRIPT_LIB "VSScript.dll"
49 #else
50  #include <dlfcn.h>
51  #define VSSCRIPT_NAME "libvapoursynth-script"
52  #define VSSCRIPT_LIB VSSCRIPT_NAME SLIBSUF
53 #endif
54 
55 struct VSState {
56  const VSSCRIPTAPI *vssapi;
57  VSScript *vss;
58 };
59 
60 typedef const VSSCRIPTAPI *(*VSScriptGetAPIFunc)(int version);
61 
62 typedef struct VSContext {
63  const AVClass *class;
64 
65  AVBufferRef *vss_state;
66 
67  const VSSCRIPTAPI *vssapi;
68  const VSAPI *vsapi;
69  void *vslibrary;
70 
71  VSNode *outnode;
72  int is_cfr;
73  int current_frame;
74 
75  int c_order[4];
76 
77  /* options */
78  int64_t max_script_size;
79 } VSContext;
80 
81 #define OFFSET(x) offsetof(VSContext, x)
82 #define A AV_OPT_FLAG_AUDIO_PARAM
83 #define D AV_OPT_FLAG_DECODING_PARAM
84 static const AVOption options[] = {
85  {"max_script_size", "set max file size supported (in bytes)", OFFSET(max_script_size), AV_OPT_TYPE_INT64, {.i64 = 1 * 1024 * 1024}, 0, SIZE_MAX - 1, A|D},
86  {NULL}
87 };
88 
89 static av_cold void* vs_load_library(VSScriptGetAPIFunc *get_vssapi)
90 {
91  void *vslibrary = NULL;
92 #ifdef _WIN32
93  const HKEY hkeys[] = {HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE};
94  LONG r;
95  WCHAR vss_path[512];
96  DWORD buf_size = sizeof(vss_path) - 2;
97  char *vss_path_utf8;
98  int i;
99 
100  for (i = 0; i < FF_ARRAY_ELEMS(hkeys); i++) {
101  if ((r = RegGetValueW(hkeys[i], L"SOFTWARE\\VapourSynth",
102  L"VSScriptDLL", RRF_RT_REG_SZ, NULL,
103  &vss_path, &buf_size)) == ERROR_SUCCESS)
104  break;
105  }
106  if (r == ERROR_SUCCESS && wchartoutf8(vss_path, &vss_path_utf8) == 0) {
107  vslibrary = dlopen(vss_path_utf8, RTLD_NOW | RTLD_GLOBAL);
108  av_free(vss_path_utf8);
109  }
110  else
111 #endif
112  vslibrary = dlopen(VSSCRIPT_LIB, RTLD_NOW | RTLD_GLOBAL);
113 
114  if (vslibrary != NULL) {
115  if (!(*get_vssapi = (VSScriptGetAPIFunc)dlsym(vslibrary, "getVSScriptAPI"))) {
116  dlclose(vslibrary);
117  return NULL;
118  }
119  }
120  return vslibrary;
121 }
122 
123 static void free_vss_state(void *opaque, uint8_t *data)
124 {
125  struct VSState *vss = opaque;
126 
127  if (vss->vss) {
128  vss->vssapi->freeScript(vss->vss);
129  }
130 }
131 
132 static av_cold int read_close_vs(AVFormatContext *s)
133 {
134  VSContext *vs = s->priv_data;
135 
136  if (vs->outnode)
137  vs->vsapi->freeNode(vs->outnode);
138 
139  av_buffer_unref(&vs->vss_state);
140 
141  vs->vsapi = NULL;
142  vs->outnode = NULL;
143 
144  if (vs->vslibrary)
145  dlclose(vs->vslibrary);
146 
147  return 0;
148 }
149 
150 static av_cold int is_native_endian(enum AVPixelFormat pixfmt)
151 {
152  enum AVPixelFormat other = av_pix_fmt_swap_endianness(pixfmt);
153  const AVPixFmtDescriptor *pd;
154  if (other == AV_PIX_FMT_NONE || other == pixfmt)
155  return 1; // not affected by byte order
156  pd = av_pix_fmt_desc_get(pixfmt);
157  return pd && (!!HAVE_BIGENDIAN == !!(pd->flags & AV_PIX_FMT_FLAG_BE));
158 }
159 
160 static av_cold enum AVPixelFormat match_pixfmt(const VSVideoFormat *vsf, int c_order[4])
161 {
162  static const int yuv_order[4] = {0, 1, 2, 0};
163  static const int rgb_order[4] = {1, 2, 0, 0};
164  const AVPixFmtDescriptor *pd;
165 
166  for (pd = av_pix_fmt_desc_next(NULL); pd; pd = av_pix_fmt_desc_next(pd)) {
167  int is_rgb, is_yuv, i;
168  const int *order;
169  enum AVPixelFormat pixfmt;
170 
171  pixfmt = av_pix_fmt_desc_get_id(pd);
172 
173  if (pd->flags & (AV_PIX_FMT_FLAG_BAYER | AV_PIX_FMT_FLAG_ALPHA |
174  AV_PIX_FMT_FLAG_HWACCEL | AV_PIX_FMT_FLAG_BITSTREAM |
175  AV_PIX_FMT_FLAG_XYZ))
176  continue;
177 
178  if (pd->log2_chroma_w != vsf->subSamplingW ||
179  pd->log2_chroma_h != vsf->subSamplingH)
180  continue;
181 
182  is_rgb = vsf->colorFamily == cfRGB;
183  if (is_rgb != !!(pd->flags & AV_PIX_FMT_FLAG_RGB))
184  continue;
185 
186  is_yuv = vsf->colorFamily == cfYUV ||
187  vsf->colorFamily == cfGray;
188  if (!is_rgb && !is_yuv)
189  continue;
190 
191  if (vsf->sampleType != ((pd->flags & AV_PIX_FMT_FLAG_FLOAT) ? stFloat : stInteger))
192  continue;
193 
194  if (av_pix_fmt_count_planes(pixfmt) != vsf->numPlanes)
195  continue;
196 
197  if (!is_native_endian(pixfmt))
198  continue;
199 
200  order = is_yuv ? yuv_order : rgb_order;
201 
202  for (i = 0; i < pd->nb_components; i++) {
203  const AVComponentDescriptor *c = &pd->comp[i];
204  if (order[c->plane] != i ||
205  c->offset != 0 || c->shift != 0 ||
206  c->step != vsf->bytesPerSample ||
207  c->depth != vsf->bitsPerSample)
208  goto cont;
209  }
210 
211  // Use it.
212  memcpy(c_order, order, sizeof(int[4]));
213  return pixfmt;
214 
215  cont: ;
216  }
217 
218  return AV_PIX_FMT_NONE;
219 }
220 
221 static av_cold int read_header_vs(AVFormatContext *s)
222 {
223  AVStream *st;
224  AVIOContext *pb = s->pb;
225  VSContext *vs = s->priv_data;
226  VSScriptGetAPIFunc get_vssapi;
227  int64_t sz = avio_size(pb);
228  char *buf = NULL;
229  char dummy;
230  char vsfmt[32];
231  const VSVideoInfo *info;
232  struct VSState *vss_state;
233  int err = 0;
234 
235  if (!(vs->vslibrary = vs_load_library(&get_vssapi))) {
236  av_log(s, AV_LOG_ERROR, "Could not open " VSSCRIPT_LIB ". "
237  "Check VapourSynth installation.\n");
238  err = AVERROR_EXTERNAL;
239  goto done;
240  }
241 
242  if (!(vs->vssapi = get_vssapi(VSSCRIPT_API_VERSION))) {
243  av_log(s, AV_LOG_ERROR, "Failed to initialize VSScript (possibly PYTHONPATH not set).\n");
244  err = AVERROR_EXTERNAL;
245  goto done;
246  }
247 
248  if (!(vs->vsapi = vs->vssapi->getVSAPI(VAPOURSYNTH_API_VERSION))) {
249  av_log(s, AV_LOG_ERROR, "Could not get VSAPI. "
250  "Check VapourSynth installation.\n");
251  err = AVERROR_EXTERNAL;
252  goto done;
253  }
254 
255  vss_state = av_mallocz(sizeof(*vss_state));
256  if (!vss_state) {
257  err = AVERROR(ENOMEM);
258  goto done;
259  }
260  vss_state->vssapi = vs->vssapi;
261 
262  vs->vss_state = av_buffer_create(NULL, 0, free_vss_state, vss_state, 0);
263  if (!vs->vss_state) {
264  err = AVERROR(ENOMEM);
265  av_free(vss_state);
266  goto done;
267  }
268 
269  if (!(vss_state->vss = vs->vssapi->createScript(NULL))) {
270  av_log(s, AV_LOG_ERROR, "Failed to create script instance.\n");
271  err = AVERROR_EXTERNAL;
272  goto done;
273  }
274 
275  if (sz < 0 || sz > vs->max_script_size) {
276  if (sz < 0)
277  av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
278  sz = vs->max_script_size;
279  }
280 
281  buf = av_malloc(sz + 1);
282  if (!buf) {
283  err = AVERROR(ENOMEM);
284  goto done;
285  }
286  sz = avio_read(pb, buf, sz);
287 
288  if (sz < 0) {
289  av_log(s, AV_LOG_ERROR, "Could not read script.\n");
290  err = sz;
291  goto done;
292  }
293 
294  // Data left means our buffer (the max_script_size option) is too small
295  if (avio_read(pb, &dummy, 1) == 1) {
296  av_log(s, AV_LOG_ERROR, "File size is larger than max_script_size option "
297  "value %"PRIi64", consider increasing the max_script_size option\n",
298  vs->max_script_size);
299  err = AVERROR_BUFFER_TOO_SMALL;
300  goto done;
301  }
302 
303  buf[sz] = '\0';
304  if (vs->vssapi->evaluateBuffer(vss_state->vss, buf, s->url)) {
305  const char *msg = vs->vssapi->getError(vss_state->vss);
306  av_log(s, AV_LOG_ERROR, "Failed to parse script: %s\n", msg ? msg : "(unknown)");
307  err = AVERROR_EXTERNAL;
308  goto done;
309  }
310 
311  vs->outnode = vs->vssapi->getOutputNode(vss_state->vss, 0);
312  if (!vs->outnode) {
313  av_log(s, AV_LOG_ERROR, "Could not get script output node.\n");
314  err = AVERROR_EXTERNAL;
315  goto done;
316  }
317 
318  st = avformat_new_stream(s, NULL);
319  if (!st) {
320  err = AVERROR(ENOMEM);
321  goto done;
322  }
323 
324  info = vs->vsapi->getVideoInfo(vs->outnode);
325 
326  if (!info->format.colorFamily || !info->width || !info->height) {
327  av_log(s, AV_LOG_ERROR, "Non-constant input format not supported.\n");
328  err = AVERROR_PATCHWELCOME;
329  goto done;
330  }
331 
332  if (info->fpsDen) {
333  vs->is_cfr = 1;
334  avpriv_set_pts_info(st, 64, info->fpsDen, info->fpsNum);
335  st->duration = info->numFrames;
336  } else {
337  // VFR. Just set "something".
338  avpriv_set_pts_info(st, 64, 1, AV_TIME_BASE);
339  s->ctx_flags |= AVFMTCTX_UNSEEKABLE;
340  }
341 
342  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
343  st->codecpar->codec_id = AV_CODEC_ID_WRAPPED_AVFRAME;
344  st->codecpar->width = info->width;
345  st->codecpar->height = info->height;
346  st->codecpar->format = match_pixfmt(&info->format, vs->c_order);
347 
348  if (st->codecpar->format == AV_PIX_FMT_NONE) {
349  av_log(s, AV_LOG_ERROR, "Unsupported VS pixel format %s\n",
350  vs->vsapi->getVideoFormatName(&info->format, vsfmt) ? vsfmt : "(unknown)");
351  err = AVERROR_EXTERNAL;
352  goto done;
353  }
354  av_log(s, AV_LOG_VERBOSE, "VS format %s -> pixfmt %s\n",
355  vs->vsapi->getVideoFormatName(&info->format, vsfmt) ? vsfmt : "(unknown)",
356  av_get_pix_fmt_name(st->codecpar->format));
357 
358 done:
359  av_free(buf);
360  return err;
361 }
362 
363 static void free_frame(void *opaque, uint8_t *data)
364 {
365  AVFrame *frame = (AVFrame *)data;
366 
367  av_frame_free(&frame);
368 }
369 
370 static int get_vs_prop_int(AVFormatContext *s, const VSMap *map, const char *name, int def)
371 {
372  VSContext *vs = s->priv_data;
373  int64_t res;
374  int err = 1;
375 
376  res = vs->vsapi->mapGetInt(map, name, 0, &err);
377  return err || res < INT_MIN || res > INT_MAX ? def : res;
378 }
379 
380 struct vsframe_ref_data {
381  const VSAPI *vsapi;
382  const VSFrame *frame;
383  AVBufferRef *vss_state;
384 };
385 
386 static void free_vsframe_ref(void *opaque, uint8_t *data)
387 {
388  struct vsframe_ref_data *d = opaque;
389 
390  if (d->frame)
391  d->vsapi->freeFrame(d->frame);
392 
393  av_buffer_unref(&d->vss_state);
394 
395  av_free(d);
396 }
397 
398 static int read_packet_vs(AVFormatContext *s, AVPacket *pkt)
399 {
400  VSContext *vs = s->priv_data;
401  AVStream *st = s->streams[0];
402  AVFrame *frame = NULL;
403  char vserr[80];
404  const VSFrame *vsframe;
405  const VSVideoInfo *info = vs->vsapi->getVideoInfo(vs->outnode);
406  const VSMap *props;
407  const AVPixFmtDescriptor *desc;
408  AVBufferRef *vsframe_ref = NULL;
409  struct vsframe_ref_data *ref_data;
410  int err = 0;
411  int i;
412 
413  if (vs->current_frame >= info->numFrames)
414  return AVERROR_EOF;
415 
416  ref_data = av_mallocz(sizeof(*ref_data));
417  if (!ref_data) {
418  err = AVERROR(ENOMEM);
419  goto end;
420  }
421 
422  // (the READONLY flag is important because the ref is reused for plane data)
423  vsframe_ref = av_buffer_create(NULL, 0, free_vsframe_ref, ref_data, AV_BUFFER_FLAG_READONLY);
424  if (!vsframe_ref) {
425  err = AVERROR(ENOMEM);
426  av_free(ref_data);
427  goto end;
428  }
429 
430  vsframe = vs->vsapi->getFrame(vs->current_frame, vs->outnode, vserr, sizeof(vserr));
431  if (!vsframe) {
432  av_log(s, AV_LOG_ERROR, "Error getting frame: %s\n", vserr);
433  err = AVERROR_EXTERNAL;
434  goto end;
435  }
436 
437  ref_data->vsapi = vs->vsapi;
438  ref_data->frame = vsframe;
439 
440  ref_data->vss_state = av_buffer_ref(vs->vss_state);
441  if (!ref_data->vss_state) {
442  err = AVERROR(ENOMEM);
443  goto end;
444  }
445 
446  props = vs->vsapi->getFramePropertiesRO(vsframe);
447 
448  frame = av_frame_alloc();
449  if (!frame) {
450  err = AVERROR(ENOMEM);
451  goto end;
452  }
453 
454  frame->format = st->codecpar->format;
455  frame->width = st->codecpar->width;
456  frame->height = st->codecpar->height;
457  frame->colorspace = st->codecpar->color_space;
458 
459  // Values according to ISO/IEC 14496-10.
460  frame->colorspace = get_vs_prop_int(s, props, "_Matrix", frame->colorspace);
461  frame->color_primaries = get_vs_prop_int(s, props, "_Primaries", frame->color_primaries);
462  frame->color_trc = get_vs_prop_int(s, props, "_Transfer", frame->color_trc);
463 
464  if (get_vs_prop_int(s, props, "_ColorRange", 1) == 0)
465  frame->color_range = AVCOL_RANGE_JPEG;
466 
467  frame->sample_aspect_ratio.num = get_vs_prop_int(s, props, "_SARNum", 0);
468  frame->sample_aspect_ratio.den = get_vs_prop_int(s, props, "_SARDen", 1);
469 
470  av_assert0(vs->vsapi->getFrameWidth(vsframe, 0) == frame->width);
471  av_assert0(vs->vsapi->getFrameHeight(vsframe, 0) == frame->height);
472 
473  desc = av_pix_fmt_desc_get(frame->format);
474 
475  for (i = 0; i < info->format.numPlanes; i++) {
476  int p = vs->c_order[i];
477  ptrdiff_t plane_h = frame->height;
478 
479  frame->data[i] = (void *)vs->vsapi->getReadPtr(vsframe, p);
480  frame->linesize[i] = vs->vsapi->getStride(vsframe, p);
481 
482  frame->buf[i] = av_buffer_ref(vsframe_ref);
483  if (!frame->buf[i]) {
484  err = AVERROR(ENOMEM);
485  goto end;
486  }
487 
488  // Each plane needs an AVBufferRef that indicates the correct plane
489  // memory range. VapourSynth doesn't even give us the memory range,
490  // so make up a bad guess to make FFmpeg happy (even if almost nothing
491  // checks the memory range).
492  if (i == 1 || i == 2)
493  plane_h = AV_CEIL_RSHIFT(plane_h, desc->log2_chroma_h);
494  frame->buf[i]->data = frame->data[i];
495  frame->buf[i]->size = frame->linesize[i] * plane_h;
496  }
497 
498  pkt->buf = av_buffer_create((uint8_t*)frame, sizeof(*frame),
499  free_frame, NULL, 0);
500  if (!pkt->buf) {
501  err = AVERROR(ENOMEM);
502  goto end;
503  }
504 
505  frame = NULL; // pkt owns it now
506 
507  pkt->data = pkt->buf->data;
508  pkt->size = pkt->buf->size;
509  pkt->flags |= AV_PKT_FLAG_TRUSTED;
510 
511  if (vs->is_cfr)
512  pkt->pts = vs->current_frame;
513 
514  vs->current_frame++;
515 
516 end:
517  av_frame_free(&frame);
518  av_buffer_unref(&vsframe_ref);
519  return err;
520 }
521 
522 static int read_seek_vs(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
523 {
524  VSContext *vs = s->priv_data;
525 
526  if (!vs->is_cfr)
527  return AVERROR(ENOSYS);
528 
529  vs->current_frame = FFMIN(FFMAX(0, ts), s->streams[0]->duration);
530  return 0;
531 }
532 
533 static av_cold int probe_vs(const AVProbeData *p)
534 {
535  // Explicitly do not support this. VS scripts are written in Python, and
536  // can run arbitrary code on the user's system.
537  return 0;
538 }
539 
540 static const AVClass class_vs = {
541  .class_name = "VapourSynth demuxer",
542  .item_name = av_default_item_name,
543  .option = options,
544  .version = LIBAVUTIL_VERSION_INT,
545 };
546 
547 const FFInputFormat ff_vapoursynth_demuxer = {
548  .p.name = "vapoursynth",
549  .p.long_name = NULL_IF_CONFIG_SMALL("VapourSynth demuxer"),
550  .p.priv_class = &class_vs,
551  .priv_data_size = sizeof(VSContext),
552  .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
553  .read_probe = probe_vs,
554  .read_header = read_header_vs,
555  .read_packet = read_packet_vs,
556  .read_close = read_close_vs,
557  .read_seek = read_seek_vs,
558 };
av_pix_fmt_swap_endianness
enum AVPixelFormat av_pix_fmt_swap_endianness(enum AVPixelFormat pix_fmt)
Utility function to swap the endianness of a pixel format.
Definition: pixdesc.c:3225
wchar_filename.h
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:215
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
name
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 default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
r
const char * r
Definition: vf_curves.c:127
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
AVCodecParameters::color_space
enum AVColorSpace color_space
Definition: codec_par.h:169
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
VSContext::current_frame
int current_frame
Definition: vapoursynth.c:73
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3170
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
ff_vapoursynth_demuxer
const FFInputFormat ff_vapoursynth_demuxer
Definition: vapoursynth.c:547
int64_t
long long int64_t
Definition: coverity.c:34
AV_PIX_FMT_FLAG_FLOAT
#define AV_PIX_FMT_FLAG_FLOAT
The pixel format contains IEEE-754 floating point values.
Definition: pixdesc.h:158
VSContext::vssapi
const VSSCRIPTAPI * vssapi
Definition: vapoursynth.c:67
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:162
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:389
pixdesc.h
AVCOL_RANGE_JPEG
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:717
AVPacket::data
uint8_t * data
Definition: packet.h:539
AVOption
AVOption.
Definition: opt.h:429
vsframe_ref_data::vss_state
AVBufferRef * vss_state
Definition: vapoursynth.c:383
data
const char data[16]
Definition: mxf.c:149
av_pix_fmt_desc_next
const AVPixFmtDescriptor * av_pix_fmt_desc_next(const AVPixFmtDescriptor *prev)
Iterate over all pixel format descriptors known to libavutil.
Definition: pixdesc.c:3177
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:225
match_pixfmt
static av_cold enum AVPixelFormat match_pixfmt(const VSVideoFormat *vsf, int c_order[4])
Definition: vapoursynth.c:160
OFFSET
#define OFFSET(x)
Definition: vapoursynth.c:81
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
get_vs_prop_int
static int get_vs_prop_int(AVFormatContext *s, const VSMap *map, const char *name, int def)
Definition: vapoursynth.c:370
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:323
free_vss_state
static void free_vss_state(void *opaque, uint8_t *data)
Definition: vapoursynth.c:123
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
vs_load_library
static av_cold void * vs_load_library(VSScriptGetAPIFunc *get_vssapi)
Definition: vapoursynth.c:89
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3210
VSSCRIPT_LIB
#define VSSCRIPT_LIB
Definition: vapoursynth.c:52
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:867
class_vs
static const AVClass class_vs
Definition: vapoursynth.c:540
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:151
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
dummy
int dummy
Definition: motion.c:66
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
AVERROR_BUFFER_TOO_SMALL
#define AVERROR_BUFFER_TOO_SMALL
Buffer too small.
Definition: error.h:53
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:807
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
avassert.h
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
VSState::vssapi
const VSSCRIPTAPI * vssapi
Definition: vapoursynth.c:56
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:42
options
static const AVOption options[]
Definition: vapoursynth.c:84
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:60
AV_BUFFER_FLAG_READONLY
#define AV_BUFFER_FLAG_READONLY
Always treat the buffer as read-only, even when it has only one reference.
Definition: buffer.h:114
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:553
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:134
info
MIPS optimizations info
Definition: mips.txt:2
vsframe_ref_data::vsapi
const VSAPI * vsapi
Definition: vapoursynth.c:381
AV_OPT_TYPE_INT64
@ AV_OPT_TYPE_INT64
Underlying C type is int64_t.
Definition: opt.h:263
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
VSContext::max_script_size
int64_t max_script_size
Definition: vapoursynth.c:78
read_header_vs
static av_cold int read_header_vs(AVFormatContext *s)
Definition: vapoursynth.c:221
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:147
limits.h
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
AV_CODEC_ID_WRAPPED_AVFRAME
@ AV_CODEC_ID_WRAPPED_AVFRAME
Passthrough codec, AVFrames wrapped in AVPacket.
Definition: codec_id.h:608
FF_INFMT_FLAG_INIT_CLEANUP
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: demux.h:35
AVFormatContext
Format I/O context.
Definition: avformat.h:1300
internal.h
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:522
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:771
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:540
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
NULL
#define NULL
Definition: coverity.c:32
VSContext::c_order
int c_order[4]
Definition: vapoursynth.c:75
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
av_buffer_unref
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
Definition: buffer.c:139
AVComponentDescriptor
Definition: pixdesc.h:30
AVPixFmtDescriptor::nb_components
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
AVFMTCTX_UNSEEKABLE
#define AVFMTCTX_UNSEEKABLE
signal that the stream is definitely not seekable, and attempts to call the seek function will fail.
Definition: avformat.h:1253
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
options
Definition: swscale.c:42
VSContext::vsapi
const VSAPI * vsapi
Definition: vapoursynth.c:68
VSContext::vslibrary
void * vslibrary
Definition: vapoursynth.c:69
read_seek_vs
static int read_seek_vs(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
Definition: vapoursynth.c:522
AVPixFmtDescriptor::flags
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:94
is_native_endian
static av_cold int is_native_endian(enum AVPixelFormat pixfmt)
Definition: vapoursynth.c:150
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
av_buffer_create
AVBufferRef * av_buffer_create(uint8_t *data, size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:55
VSState::vss
VSScript * vss
Definition: vapoursynth.c:57
eval.h
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AVPacket::size
int size
Definition: packet.h:540
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:94
AV_PIX_FMT_FLAG_RGB
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:136
AV_PIX_FMT_FLAG_BITSTREAM
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:124
VSContext::vss_state
AVBufferRef * vss_state
Definition: vapoursynth.c:65
frame.h
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:46
read_close_vs
static av_cold int read_close_vs(AVFormatContext *s)
Definition: vapoursynth.c:132
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:59
av_pix_fmt_desc_get_id
enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc)
Definition: pixdesc.c:3189
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:545
version
version
Definition: libkvazaar.c:321
AVBufferRef::size
size_t size
Size of data in bytes.
Definition: buffer.h:94
AV_PIX_FMT_FLAG_BAYER
#define AV_PIX_FMT_FLAG_BAYER
The pixel format is following a Bayer pattern.
Definition: pixdesc.h:152
free_frame
static void free_frame(void *opaque, uint8_t *data)
Definition: vapoursynth.c:363
VSContext::is_cfr
int is_cfr
Definition: vapoursynth.c:72
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:532
read_packet_vs
static int read_packet_vs(AVFormatContext *s, AVPacket *pkt)
Definition: vapoursynth.c:398
AVCodecParameters::height
int height
Definition: codec_par.h:135
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
VSContext::outnode
VSNode * outnode
Definition: vapoursynth.c:71
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_PIX_FMT_FLAG_BE
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:116
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:256
VSContext
Definition: vapoursynth.c:62
demux.h
AVStream
Stream structure.
Definition: avformat.h:748
pixfmt
enum AVPixelFormat pixfmt
Definition: kmsgrab.c:367
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:80
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
avformat.h
A
#define A
Definition: vapoursynth.c:82
probe_vs
static av_cold int probe_vs(const AVProbeData *p)
Definition: vapoursynth.c:533
AV_PIX_FMT_FLAG_XYZ
#define AV_PIX_FMT_FLAG_XYZ
The pixel format contains XYZ-like data (as opposed to YUV/RGB/grayscale).
Definition: pixdesc.h:163
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:612
vsframe_ref_data::frame
const VSFrame * frame
Definition: vapoursynth.c:382
vsframe_ref_data
Definition: vapoursynth.c:380
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:105
L
#define L(x)
Definition: vpx_arith.h:36
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
D
#define D
Definition: vapoursynth.c:83
mem.h
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
AVCodecParameters::format
int format
Definition: codec_par.h:92
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
map
const VDPAUPixFmtMap * map
Definition: hwcontext_vdpau.c:71
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:516
FFInputFormat
Definition: demux.h:42
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
avstring.h
AV_PKT_FLAG_TRUSTED
#define AV_PKT_FLAG_TRUSTED
The packet comes from a trusted source.
Definition: packet.h:608
VSState
Definition: vapoursynth.c:55
VSScriptGetAPIFunc
const typedef VSSCRIPTAPI *(* VSScriptGetAPIFunc)(int version)
Definition: vapoursynth.c:60
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
w32dlfcn.h
free_vsframe_ref
static void free_vsframe_ref(void *opaque, uint8_t *data)
Definition: vapoursynth.c:386
av_get_pix_fmt_name
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:3090
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