1 // Avisynth C Interface Version 0.20
2 // Copyright 2003 Kevin Atkinson
4 // This program is free software; you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation; either version 2 of the License, or
7 // (at your option) any later version.
9 // This program 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
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA, or visit
17 // http://www.gnu.org/copyleft/gpl.html .
19 // As a special exception, I give you permission to link to the
20 // Avisynth C interface with independent modules that communicate with
21 // the Avisynth C interface solely through the interfaces defined in
22 // avisynth_c.h, regardless of the license terms of these independent
23 // modules, and to copy and distribute the resulting combined work
24 // under terms of your choice, provided that every copy of the
25 // combined work is accompanied by a complete copy of the source code
26 // of the Avisynth C interface and Avisynth itself (with the version
27 // used to produce the combined work), being distributed under the
28 // terms of the GNU General Public License plus this exception. An
29 // independent module is a module which is not derived from or based
30 // on Avisynth C Interface, such as 3rd-party filters, import and
31 // export plugins, or graphical user interfaces.
33 #ifndef __AVISYNTH_C__
34 #define __AVISYNTH_C__
37 # define EXTERN_C extern "C"
42 #define AVSC_USE_STDCALL 1
44 #ifndef AVSC_USE_STDCALL
45 # define AVSC_CC __cdecl
47 # define AVSC_CC __stdcall
50 #define AVSC_EXPORT EXTERN_C __declspec(dllexport)
51 #define AVSC_INLINE static __inline
52 #ifdef AVISYNTH_C_EXPORTS
53 # define AVSC_API(ret) EXTERN_C __declspec(dllexport) ret AVSC_CC
55 # define AVSC_API(ret) EXTERN_C __declspec(dllimport) ret AVSC_CC
58 typedef unsigned char BYTE;
60 typedef long long int INT64;
62 typedef __int64 INT64;
66 /////////////////////////////////////////////////////////////////////
71 #ifndef __AVISYNTH_H__
72 enum { AVISYNTH_INTERFACE_VERSION = 2 };
75 enum {AVS_SAMPLE_INT8 = 1<<0,
76 AVS_SAMPLE_INT16 = 1<<1,
77 AVS_SAMPLE_INT24 = 1<<2,
78 AVS_SAMPLE_INT32 = 1<<3,
79 AVS_SAMPLE_FLOAT = 1<<4};
81 enum {AVS_PLANAR_Y=1<<0,
84 AVS_PLANAR_ALIGNED=1<<3,
85 AVS_PLANAR_Y_ALIGNED=AVS_PLANAR_Y|AVS_PLANAR_ALIGNED,
86 AVS_PLANAR_U_ALIGNED=AVS_PLANAR_U|AVS_PLANAR_ALIGNED,
87 AVS_PLANAR_V_ALIGNED=AVS_PLANAR_V|AVS_PLANAR_ALIGNED};
89 // Colorspace properties.
90 enum {AVS_CS_BGR = 1<<28,
92 AVS_CS_INTERLEAVED = 1<<30,
93 AVS_CS_PLANAR = 1<<31};
95 // Specific colorformats
98 AVS_CS_BGR24 = 1<<0 | AVS_CS_BGR | AVS_CS_INTERLEAVED,
99 AVS_CS_BGR32 = 1<<1 | AVS_CS_BGR | AVS_CS_INTERLEAVED,
100 AVS_CS_YUY2 = 1<<2 | AVS_CS_YUV | AVS_CS_INTERLEAVED,
101 AVS_CS_YV12 = 1<<3 | AVS_CS_YUV | AVS_CS_PLANAR, // y-v-u, planar
102 AVS_CS_I420 = 1<<4 | AVS_CS_YUV | AVS_CS_PLANAR, // y-u-v, planar
103 AVS_CS_IYUV = 1<<4 | AVS_CS_YUV | AVS_CS_PLANAR // same as above
109 AVS_IT_FIELDBASED = 1<<2};
113 AVS_FILTER_INPUT_COLORSPACE=2,
114 AVS_FILTER_OUTPUT_TYPE=9,
117 AVS_FILTER_VERSION=6,
119 AVS_FILTER_ARGS_INFO=8,
120 AVS_FILTER_ARGS_DESCRIPTION=10,
121 AVS_FILTER_DESCRIPTION=11};
124 AVS_FILTER_TYPE_AUDIO=1,
125 AVS_FILTER_TYPE_VIDEO=2,
126 AVS_FILTER_OUTPUT_TYPE_SAME=3,
127 AVS_FILTER_OUTPUT_TYPE_DIFFERENT=4};
133 #define AVS_FRAME_ALIGN 16
135 typedef struct AVS_Clip AVS_Clip;
136 typedef struct AVS_ScriptEnvironment AVS_ScriptEnvironment;
138 /////////////////////////////////////////////////////////////////////
143 // AVS_VideoInfo is layed out identicly to VideoInfo
144 typedef struct AVS_VideoInfo {
145 int width, height; // width=0 means no video
146 unsigned fps_numerator, fps_denominator;
151 int audio_samples_per_second; // 0 means no audio
153 INT64 num_audio_samples;
156 // Imagetype properties
161 // useful functions of the above
162 AVSC_INLINE int avs_has_video(const AVS_VideoInfo * p)
163 { return (p->width!=0); }
165 AVSC_INLINE int avs_has_audio(const AVS_VideoInfo * p)
166 { return (p->audio_samples_per_second!=0); }
168 AVSC_INLINE int avs_is_rgb(const AVS_VideoInfo * p)
169 { return !!(p->pixel_type&AVS_CS_BGR); }
171 AVSC_INLINE int avs_is_rgb24(const AVS_VideoInfo * p)
172 { return (p->pixel_type&AVS_CS_BGR24)==AVS_CS_BGR24; } // Clear out additional properties
174 AVSC_INLINE int avs_is_rgb32(const AVS_VideoInfo * p)
175 { return (p->pixel_type & AVS_CS_BGR32) == AVS_CS_BGR32 ; }
177 AVSC_INLINE int avs_is_yuv(const AVS_VideoInfo * p)
178 { return !!(p->pixel_type&AVS_CS_YUV ); }
180 AVSC_INLINE int avs_is_yuy2(const AVS_VideoInfo * p)
181 { return (p->pixel_type & AVS_CS_YUY2) == AVS_CS_YUY2; }
183 AVSC_INLINE int avs_is_yv12(const AVS_VideoInfo * p)
184 { return ((p->pixel_type & AVS_CS_YV12) == AVS_CS_YV12)||((p->pixel_type & AVS_CS_I420) == AVS_CS_I420); }
186 AVSC_INLINE int avs_is_color_space(const AVS_VideoInfo * p, int c_space)
187 { return ((p->pixel_type & c_space) == c_space); }
189 AVSC_INLINE int avs_is_property(const AVS_VideoInfo * p, int property)
190 { return ((p->pixel_type & property)==property ); }
192 AVSC_INLINE int avs_is_planar(const AVS_VideoInfo * p)
193 { return !!(p->pixel_type & AVS_CS_PLANAR); }
195 AVSC_INLINE int avs_is_field_based(const AVS_VideoInfo * p)
196 { return !!(p->image_type & AVS_IT_FIELDBASED); }
198 AVSC_INLINE int avs_is_parity_known(const AVS_VideoInfo * p)
199 { return ((p->image_type & AVS_IT_FIELDBASED)&&(p->image_type & (AVS_IT_BFF | AVS_IT_TFF))); }
201 AVSC_INLINE int avs_is_bff(const AVS_VideoInfo * p)
202 { return !!(p->image_type & AVS_IT_BFF); }
204 AVSC_INLINE int avs_is_tff(const AVS_VideoInfo * p)
205 { return !!(p->image_type & AVS_IT_TFF); }
207 AVSC_INLINE int avs_bits_per_pixel(const AVS_VideoInfo * p)
209 switch (p->pixel_type) {
210 case AVS_CS_BGR24: return 24;
211 case AVS_CS_BGR32: return 32;
212 case AVS_CS_YUY2: return 16;
214 case AVS_CS_I420: return 12;
218 AVSC_INLINE int avs_bytes_from_pixels(const AVS_VideoInfo * p, int pixels)
219 { return pixels * (avs_bits_per_pixel(p)>>3); } // Will work on planar images, but will return only luma planes
221 AVSC_INLINE int avs_row_size(const AVS_VideoInfo * p)
222 { return avs_bytes_from_pixels(p,p->width); } // Also only returns first plane on planar images
224 AVSC_INLINE int avs_bmp_size(const AVS_VideoInfo * vi)
225 { if (avs_is_planar(vi)) {int p = vi->height * ((avs_row_size(vi)+3) & ~3); p+=p>>1; return p; } return vi->height * ((avs_row_size(vi)+3) & ~3); }
227 AVSC_INLINE int avs_samples_per_second(const AVS_VideoInfo * p)
228 { return p->audio_samples_per_second; }
231 AVSC_INLINE int avs_bytes_per_channel_sample(const AVS_VideoInfo * p)
233 switch (p->sample_type) {
234 case AVS_SAMPLE_INT8: return sizeof(signed char);
235 case AVS_SAMPLE_INT16: return sizeof(signed short);
236 case AVS_SAMPLE_INT24: return 3;
237 case AVS_SAMPLE_INT32: return sizeof(signed int);
238 case AVS_SAMPLE_FLOAT: return sizeof(float);
242 AVSC_INLINE int avs_bytes_per_audio_sample(const AVS_VideoInfo * p)
243 { return p->nchannels*avs_bytes_per_channel_sample(p);}
245 AVSC_INLINE INT64 avs_audio_samples_from_frames(const AVS_VideoInfo * p, INT64 frames)
246 { return ((INT64)(frames) * p->audio_samples_per_second * p->fps_denominator / p->fps_numerator); }
248 AVSC_INLINE int avs_frames_from_audio_samples(const AVS_VideoInfo * p, INT64 samples)
249 { return (int)(samples * (INT64)p->fps_numerator / (INT64)p->fps_denominator / (INT64)p->audio_samples_per_second); }
251 AVSC_INLINE INT64 avs_audio_samples_from_bytes(const AVS_VideoInfo * p, INT64 bytes)
252 { return bytes / avs_bytes_per_audio_sample(p); }
254 AVSC_INLINE INT64 avs_bytes_from_audio_samples(const AVS_VideoInfo * p, INT64 samples)
255 { return samples * avs_bytes_per_audio_sample(p); }
257 AVSC_INLINE int avs_audio_channels(const AVS_VideoInfo * p)
258 { return p->nchannels; }
260 AVSC_INLINE int avs_sample_type(const AVS_VideoInfo * p)
261 { return p->sample_type;}
264 AVSC_INLINE void avs_set_property(AVS_VideoInfo * p, int property)
265 { p->image_type|=property; }
267 AVSC_INLINE void avs_clear_property(AVS_VideoInfo * p, int property)
268 { p->image_type&=~property; }
270 AVSC_INLINE void avs_set_field_based(AVS_VideoInfo * p, int isfieldbased)
271 { if (isfieldbased) p->image_type|=AVS_IT_FIELDBASED; else p->image_type&=~AVS_IT_FIELDBASED; }
273 AVSC_INLINE void avs_set_fps(AVS_VideoInfo * p, unsigned numerator, unsigned denominator)
275 unsigned x=numerator, y=denominator;
276 while (y) { // find gcd
277 unsigned t = x%y; x = y; y = t;
279 p->fps_numerator = numerator/x;
280 p->fps_denominator = denominator/x;
283 AVSC_INLINE int avs_is_same_colorspace(AVS_VideoInfo * x, AVS_VideoInfo * y)
285 return (x->pixel_type == y->pixel_type)
286 || (avs_is_yv12(x) && avs_is_yv12(y));
289 /////////////////////////////////////////////////////////////////////
294 // VideoFrameBuffer holds information about a memory block which is used
295 // for video data. For efficiency, instances of this class are not deleted
296 // when the refcount reaches zero; instead they're stored in a linked list
297 // to be reused. The instances are deleted when the corresponding AVS
300 // AVS_VideoFrameBuffer is layed out identicly to VideoFrameBuffer
301 // DO NOT USE THIS STRUCTURE DIRECTLY
302 typedef struct AVS_VideoFrameBuffer {
305 // sequence_number is incremented every time the buffer is changed, so
306 // that stale views can tell they're no longer valid.
307 long sequence_number;
310 } AVS_VideoFrameBuffer;
312 // VideoFrame holds a "window" into a VideoFrameBuffer.
314 // AVS_VideoFrame is layed out identicly to IVideoFrame
315 // DO NOT USE THIS STRUCTURE DIRECTLY
316 typedef struct AVS_VideoFrame {
318 AVS_VideoFrameBuffer * vfb;
319 int offset, pitch, row_size, height, offsetU, offsetV, pitchUV; // U&V offsets are from top of picture.
322 // Access functions for AVS_VideoFrame
323 AVSC_INLINE int avs_get_pitch(const AVS_VideoFrame * p) {
326 AVSC_INLINE int avs_get_pitch_p(const AVS_VideoFrame * p, int plane) {
328 case AVS_PLANAR_U: case AVS_PLANAR_V: return p->pitchUV;}
331 AVSC_INLINE int avs_get_row_size(const AVS_VideoFrame * p) {
332 return p->row_size; }
334 AVSC_INLINE int avs_get_row_size_p(const AVS_VideoFrame * p, int plane) {
337 case AVS_PLANAR_U: case AVS_PLANAR_V:
338 if (p->pitchUV) return p->row_size>>1;
340 case AVS_PLANAR_U_ALIGNED: case AVS_PLANAR_V_ALIGNED:
342 int r = ((p->row_size+AVS_FRAME_ALIGN-1)&(~(AVS_FRAME_ALIGN-1)) )>>1; // Aligned rowsize
345 return p->row_size>>1;
347 case AVS_PLANAR_Y_ALIGNED:
348 r = (p->row_size+AVS_FRAME_ALIGN-1)&(~(AVS_FRAME_ALIGN-1)); // Aligned rowsize
356 AVSC_INLINE int avs_get_height(const AVS_VideoFrame * p) {
359 AVSC_INLINE int avs_get_height_p(const AVS_VideoFrame * p, int plane) {
361 case AVS_PLANAR_U: case AVS_PLANAR_V:
362 if (p->pitchUV) return p->height>>1;
367 AVSC_INLINE const BYTE* avs_get_read_ptr(const AVS_VideoFrame * p) {
368 return p->vfb->data + p->offset;}
370 AVSC_INLINE const BYTE* avs_get_read_ptr_p(const AVS_VideoFrame * p, int plane)
373 case AVS_PLANAR_U: return p->vfb->data + p->offsetU;
374 case AVS_PLANAR_V: return p->vfb->data + p->offsetV;
375 default: return p->vfb->data + p->offset;}
378 AVSC_INLINE int avs_is_writable(const AVS_VideoFrame * p) {
379 return (p->refcount == 1 && p->vfb->refcount == 1);}
381 AVSC_INLINE BYTE* avs_get_write_ptr(const AVS_VideoFrame * p)
383 if (avs_is_writable(p)) {
384 ++p->vfb->sequence_number;
385 return p->vfb->data + p->offset;
390 AVSC_INLINE BYTE* avs_get_write_ptr_p(const AVS_VideoFrame * p, int plane)
392 if (plane==AVS_PLANAR_Y && avs_is_writable(p)) {
393 ++p->vfb->sequence_number;
394 return p->vfb->data + p->offset;
395 } else if (plane==AVS_PLANAR_Y) {
399 case AVS_PLANAR_U: return p->vfb->data + p->offsetU;
400 case AVS_PLANAR_V: return p->vfb->data + p->offsetV;
401 default: return p->vfb->data + p->offset;
407 AVSC_API(void) avs_release_video_frame(AVS_VideoFrame *);
408 // makes a shallow copy of a video frame
409 AVSC_API(AVS_VideoFrame *) avs_copy_video_frame(AVS_VideoFrame *);
411 AVSC_INLINE void avs_release_frame(AVS_VideoFrame * f)
412 {avs_release_video_frame(f);}
413 AVSC_INLINE AVS_VideoFrame * avs_copy_frame(AVS_VideoFrame * f)
414 {return avs_copy_video_frame(f);}
418 /////////////////////////////////////////////////////////////////////
423 // Treat AVS_Value as a fat pointer. That is use avs_copy_value
424 // and avs_release_value appropiaty as you would if AVS_Value was
427 // To maintain source code compatibility with future versions of the
428 // avisynth_c API don't use the AVS_Value directly. Use the helper
431 // AVS_Value is layed out identicly to AVSValue
432 typedef struct AVS_Value AVS_Value;
434 short type; // 'a'rray, 'c'lip, 'b'ool, 'i'nt, 'f'loat, 's'tring, 'v'oid, or 'l'ong
435 // for some function e'rror
438 void * clip; // do not use directly, use avs_take_clip
443 const AVS_Value * array;
447 // AVS_Value should be initilized with avs_void.
448 // Should also set to avs_void after the value is released
449 // with avs_copy_value. Consider it the equalvent of setting
451 static const AVS_Value avs_void = {'v'};
453 AVSC_API(void) avs_copy_value(AVS_Value * dest, AVS_Value src);
454 AVSC_API(void) avs_release_value(AVS_Value);
456 AVSC_INLINE int avs_defined(AVS_Value v) { return v.type != 'v'; }
457 AVSC_INLINE int avs_is_clip(AVS_Value v) { return v.type == 'c'; }
458 AVSC_INLINE int avs_is_bool(AVS_Value v) { return v.type == 'b'; }
459 AVSC_INLINE int avs_is_int(AVS_Value v) { return v.type == 'i'; }
460 AVSC_INLINE int avs_is_float(AVS_Value v) { return v.type == 'f' || v.type == 'i'; }
461 AVSC_INLINE int avs_is_string(AVS_Value v) { return v.type == 's'; }
462 AVSC_INLINE int avs_is_array(AVS_Value v) { return v.type == 'a'; }
463 AVSC_INLINE int avs_is_error(AVS_Value v) { return v.type == 'e'; }
465 AVSC_API(AVS_Clip *) avs_take_clip(AVS_Value, AVS_ScriptEnvironment *);
466 AVSC_API(void) avs_set_to_clip(AVS_Value *, AVS_Clip *);
468 AVSC_INLINE int avs_as_bool(AVS_Value v)
469 { return v.d.boolean; }
470 AVSC_INLINE int avs_as_int(AVS_Value v)
471 { return v.d.integer; }
472 AVSC_INLINE const char * avs_as_string(AVS_Value v)
473 { return avs_is_error(v) || avs_is_string(v) ? v.d.string : 0; }
474 AVSC_INLINE double avs_as_float(AVS_Value v)
475 { return avs_is_int(v) ? v.d.integer : v.d.floating_pt; }
476 AVSC_INLINE const char * avs_as_error(AVS_Value v)
477 { return avs_is_error(v) ? v.d.string : 0; }
478 AVSC_INLINE const AVS_Value * avs_as_array(AVS_Value v)
479 { return v.d.array; }
480 AVSC_INLINE int avs_array_size(AVS_Value v)
481 { return avs_is_array(v) ? v.array_size : 1; }
482 AVSC_INLINE AVS_Value avs_array_elt(AVS_Value v, int index)
483 { return avs_is_array(v) ? v.d.array[index] : v; }
485 // only use these functions on am AVS_Value that does not already have
486 // an active value. Remember, treat AVS_Value as a fat pointer.
487 AVSC_INLINE AVS_Value avs_new_value_bool(int v0)
488 { AVS_Value v; v.type = 'b'; v.d.boolean = v0 == 0 ? 0 : 1; return v; }
489 AVSC_INLINE AVS_Value avs_new_value_int(int v0)
490 { AVS_Value v; v.type = 'i'; v.d.integer = v0; return v; }
491 AVSC_INLINE AVS_Value avs_new_value_string(const char * v0)
492 { AVS_Value v; v.type = 's'; v.d.string = v0; return v; }
493 AVSC_INLINE AVS_Value avs_new_value_float(float v0)
494 { AVS_Value v; v.type = 'f'; v.d.floating_pt = v0; return v;}
495 AVSC_INLINE AVS_Value avs_new_value_error(const char * v0)
496 { AVS_Value v; v.type = 'e'; v.d.string = v0; return v; }
497 AVSC_INLINE AVS_Value avs_new_value_clip(AVS_Clip * v0)
498 { AVS_Value v; avs_set_to_clip(&v, v0); return v; }
499 AVSC_INLINE AVS_Value avs_new_value_array(AVS_Value * v0, int size)
500 { AVS_Value v; v.type = 'a'; v.d.array = v0; v.array_size = size; return v; }
502 /////////////////////////////////////////////////////////////////////
507 AVSC_API(void) avs_release_clip(AVS_Clip *);
508 AVSC_API(AVS_Clip *) avs_copy_clip(AVS_Clip *);
510 AVSC_API(const char *) avs_clip_get_error(AVS_Clip *); // return 0 if no error
512 AVSC_API(const AVS_VideoInfo *) avs_get_video_info(AVS_Clip *);
514 AVSC_API(int) avs_get_version(AVS_Clip *);
516 AVSC_API(AVS_VideoFrame *) avs_get_frame(AVS_Clip *, int n);
517 // The returned video frame must be released with avs_release_video_frame
519 AVSC_API(int) avs_get_parity(AVS_Clip *, int n);
520 // return field parity if field_based, else parity of first field in frame
522 AVSC_API(int) avs_get_audio(AVS_Clip *, void * buf,
523 INT64 start, INT64 count);
524 // start and count are in samples
526 AVSC_API(int) avs_set_cache_hints(AVS_Clip *,
527 int cachehints, int frame_range);
529 // This is the callback type used by avs_add_function
530 typedef AVS_Value (AVSC_CC * AVS_ApplyFunc)
531 (AVS_ScriptEnvironment *, AVS_Value args, void * user_data);
533 typedef struct AVS_FilterInfo AVS_FilterInfo;
534 struct AVS_FilterInfo
536 // these members should not be modified outside of the AVS_ApplyFunc callback
539 AVS_ScriptEnvironment * env;
540 AVS_VideoFrame * (AVSC_CC * get_frame)(AVS_FilterInfo *, int n);
541 int (AVSC_CC * get_parity)(AVS_FilterInfo *, int n);
542 int (AVSC_CC * get_audio)(AVS_FilterInfo *, void * buf,
543 INT64 start, INT64 count);
544 int (AVSC_CC * set_cache_hints)(AVS_FilterInfo *, int cachehints,
546 void (AVSC_CC * free_filter)(AVS_FilterInfo *);
548 // Should be set when ever there is an error to report.
549 // It is cleared before any of the above methods are called
551 // this is to store whatever and may be modified at will
555 // Create a new filter
556 // fi is set to point to the AVS_FilterInfo so that you can
557 // modify it once it is initilized.
558 // store_child should generally be set to true. If it is not
559 // set than ALL methods (the function pointers) must be defined
560 // If it is set than you do not need to worry about freeing the child
562 AVSC_API(AVS_Clip *) avs_new_c_filter(AVS_ScriptEnvironment * e,
563 AVS_FilterInfo * * fi,
564 AVS_Value child, int store_child);
566 /////////////////////////////////////////////////////////////////////
568 // AVS_ScriptEnvironment
571 // For GetCPUFlags. These are backwards-compatible with those in VirtualDub.
573 /* slowest CPU to support extension */
574 AVS_CPU_FORCE = 0x01, // N/A
575 AVS_CPU_FPU = 0x02, // 386/486DX
576 AVS_CPU_MMX = 0x04, // P55C, K6, PII
577 AVS_CPU_INTEGER_SSE = 0x08, // PIII, Athlon
578 AVS_CPU_SSE = 0x10, // PIII, Athlon XP/MP
579 AVS_CPU_SSE2 = 0x20, // PIV, Hammer
580 AVS_CPU_3DNOW = 0x40, // K6-2
581 AVS_CPU_3DNOW_EXT = 0x80, // Athlon
582 AVS_CPU_X86_64 = 0xA0, // Hammer (note: equiv. to 3DNow + SSE2,
583 // which only Hammer will have anyway)
587 AVSC_API(long) avs_get_cpu_flags(AVS_ScriptEnvironment *);
588 AVSC_API(int) avs_check_version(AVS_ScriptEnvironment *, int version);
590 AVSC_API(char *) avs_save_string(AVS_ScriptEnvironment *, const char* s, int length);
591 AVSC_API(char *) avs_sprintf(AVS_ScriptEnvironment *, const char * fmt, ...);
593 AVSC_API(char *) avs_vsprintf(AVS_ScriptEnvironment *, const char * fmt, void* val);
594 // note: val is really a va_list; I hope everyone typedefs va_list to a pointer
596 AVSC_API(int) avs_add_function(AVS_ScriptEnvironment *,
597 const char * name, const char * params,
598 AVS_ApplyFunc apply, void * user_data);
600 AVSC_API(int) avs_function_exists(AVS_ScriptEnvironment *, const char * name);
602 AVSC_API(AVS_Value) avs_invoke(AVS_ScriptEnvironment *, const char * name,
603 AVS_Value args, const char** arg_names);
604 // The returned value must be be released with avs_release_value
606 AVSC_API(AVS_Value) avs_get_var(AVS_ScriptEnvironment *, const char* name);
607 // The returned value must be be released with avs_release_value
609 AVSC_API(int) avs_set_var(AVS_ScriptEnvironment *, const char* name, AVS_Value val);
611 AVSC_API(int) avs_set_global_var(AVS_ScriptEnvironment *, const char* name, const AVS_Value val);
613 //void avs_push_context(AVS_ScriptEnvironment *, int level=0);
614 //void avs_pop_context(AVS_ScriptEnvironment *);
616 AVSC_API(AVS_VideoFrame *) avs_new_video_frame_a(AVS_ScriptEnvironment *,
617 const AVS_VideoInfo * vi, int align);
618 // align should be at least 16
621 AVS_VideoFrame * avs_new_video_frame(AVS_ScriptEnvironment * env,
622 const AVS_VideoInfo * vi)
623 {return avs_new_video_frame_a(env,vi,AVS_FRAME_ALIGN);}
626 AVS_VideoFrame * avs_new_frame(AVS_ScriptEnvironment * env,
627 const AVS_VideoInfo * vi)
628 {return avs_new_video_frame_a(env,vi,AVS_FRAME_ALIGN);}
631 AVSC_API(int) avs_make_writable(AVS_ScriptEnvironment *, AVS_VideoFrame * * pvf);
633 AVSC_API(void) avs_bit_blt(AVS_ScriptEnvironment *, BYTE* dstp, int dst_pitch, const BYTE* srcp, int src_pitch, int row_size, int height);
635 typedef void (AVSC_CC *AVS_ShutdownFunc)(void* user_data, AVS_ScriptEnvironment * env);
636 AVSC_API(void) avs_at_exit(AVS_ScriptEnvironment *, AVS_ShutdownFunc function, void * user_data);
638 AVSC_API(AVS_VideoFrame *) avs_subframe(AVS_ScriptEnvironment *, AVS_VideoFrame * src, int rel_offset, int new_pitch, int new_row_size, int new_height);
639 // The returned video frame must be be released
641 AVSC_API(int) avs_set_memory_max(AVS_ScriptEnvironment *, int mem);
643 AVSC_API(int) avs_set_working_dir(AVS_ScriptEnvironment *, const char * newdir);
645 // avisynth.dll exports this; it's a way to use it as a library, without
646 // writing an AVS script or without going through AVIFile.
647 AVSC_API(AVS_ScriptEnvironment *) avs_create_script_environment(int version);
649 // this symbol is the entry point for the plugin and must
652 const char * AVSC_CC avisynth_c_plugin_init(AVS_ScriptEnvironment* env);
655 AVSC_API(void) avs_delete_script_environment(AVS_ScriptEnvironment *);
658 AVSC_API(AVS_VideoFrame *) avs_subframe_planar(AVS_ScriptEnvironment *, AVS_VideoFrame * src, int rel_offset, int new_pitch, int new_row_size, int new_height, int rel_offsetU, int rel_offsetV, int new_pitchUV);
659 // The returned video frame must be be released