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ffmpeg/libavformat/avisynth.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* AviSynth(+) support
* Copyright (c) 2012 AvxSynth Team
*
* This file is part of FFmpeg
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/attributes.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "demux.h"
#include "internal.h"
#include "config.h"
/* Enable function pointer definitions for runtime loading. */
#define AVSC_NO_DECLSPEC
/* Platform-specific directives. */
#ifdef _WIN32
#include "compat/w32dlfcn.h"
#include "libavutil/wchar_filename.h"
#undef EXTERN_C
#define AVISYNTH_LIB "avisynth"
#else
#include <dlfcn.h>
#define AVISYNTH_NAME "libavisynth"
#define AVISYNTH_LIB AVISYNTH_NAME SLIBSUF
#endif
/* Endianness guards for audio */
#if HAVE_BIGENDIAN
#define PCM(format) (AV_CODEC_ID_PCM_ ## format ## BE)
#else
#define PCM(format) (AV_CODEC_ID_PCM_ ## format ## LE)
#endif
#include <avisynth/avisynth_c.h>
typedef struct AviSynthLibrary {
void *library;
#define AVSC_DECLARE_FUNC(name) name ## _func name
AVSC_DECLARE_FUNC(avs_bit_blt);
AVSC_DECLARE_FUNC(avs_clip_get_error);
AVSC_DECLARE_FUNC(avs_check_version);
AVSC_DECLARE_FUNC(avs_create_script_environment);
AVSC_DECLARE_FUNC(avs_delete_script_environment);
AVSC_DECLARE_FUNC(avs_get_audio);
AVSC_DECLARE_FUNC(avs_get_channel_mask);
AVSC_DECLARE_FUNC(avs_get_error);
AVSC_DECLARE_FUNC(avs_get_frame);
AVSC_DECLARE_FUNC(avs_get_version);
AVSC_DECLARE_FUNC(avs_get_video_info);
AVSC_DECLARE_FUNC(avs_invoke);
AVSC_DECLARE_FUNC(avs_is_color_space);
AVSC_DECLARE_FUNC(avs_release_clip);
AVSC_DECLARE_FUNC(avs_release_value);
AVSC_DECLARE_FUNC(avs_release_video_frame);
AVSC_DECLARE_FUNC(avs_take_clip);
AVSC_DECLARE_FUNC(avs_bits_per_pixel);
AVSC_DECLARE_FUNC(avs_get_height_p);
AVSC_DECLARE_FUNC(avs_get_pitch_p);
AVSC_DECLARE_FUNC(avs_get_read_ptr_p);
AVSC_DECLARE_FUNC(avs_get_row_size_p);
AVSC_DECLARE_FUNC(avs_is_planar_rgb);
AVSC_DECLARE_FUNC(avs_is_planar_rgba);
AVSC_DECLARE_FUNC(avs_get_frame_props_ro);
AVSC_DECLARE_FUNC(avs_prop_get_int);
AVSC_DECLARE_FUNC(avs_prop_get_type);
AVSC_DECLARE_FUNC(avs_get_env_property);
#undef AVSC_DECLARE_FUNC
} AviSynthLibrary;
typedef enum AviSynthFlags {
AVISYNTH_FRAMEPROP_FIELD_ORDER = (1 << 0),
AVISYNTH_FRAMEPROP_RANGE = (1 << 1),
AVISYNTH_FRAMEPROP_PRIMARIES = (1 << 2),
AVISYNTH_FRAMEPROP_TRANSFER = (1 << 3),
AVISYNTH_FRAMEPROP_MATRIX = (1 << 4),
AVISYNTH_FRAMEPROP_CHROMA_LOCATION = (1 << 5),
AVISYNTH_FRAMEPROP_SAR = (1 << 6),
} AviSynthFlags;
typedef struct AviSynthContext {
const AVClass *class;
AVS_ScriptEnvironment *env;
AVS_Clip *clip;
const AVS_VideoInfo *vi;
/* avisynth_read_packet_video() iterates over this. */
int n_planes;
const int *planes;
int curr_stream;
int curr_frame;
int64_t curr_sample;
int error;
uint32_t flags;
/* Linked list pointers. */
struct AviSynthContext *next;
} AviSynthContext;
static const int avs_planes_packed[1] = { 0 };
static const int avs_planes_grey[1] = { AVS_PLANAR_Y };
static const int avs_planes_yuv[3] = { AVS_PLANAR_Y, AVS_PLANAR_U,
AVS_PLANAR_V };
static const int avs_planes_rgb[3] = { AVS_PLANAR_G, AVS_PLANAR_B,
AVS_PLANAR_R };
static const int avs_planes_yuva[4] = { AVS_PLANAR_Y, AVS_PLANAR_U,
AVS_PLANAR_V, AVS_PLANAR_A };
static const int avs_planes_rgba[4] = { AVS_PLANAR_G, AVS_PLANAR_B,
AVS_PLANAR_R, AVS_PLANAR_A };
/* A conflict between C++ global objects, atexit, and dynamic loading requires
* us to register our own atexit handler to prevent double freeing. */
static AviSynthLibrary avs_library;
static int avs_atexit_called = 0;
/* Linked list of AviSynthContexts. An atexit handler destroys this list. */
static AviSynthContext *avs_ctx_list = NULL;
static av_cold void avisynth_atexit_handler(void);
static av_cold int avisynth_load_library(void)
{
avs_library.library = dlopen(AVISYNTH_LIB, RTLD_NOW | RTLD_LOCAL);
if (!avs_library.library)
return AVERROR_UNKNOWN;
#define LOAD_AVS_FUNC(name, continue_on_fail) \
avs_library.name = (name ## _func) \
dlsym(avs_library.library, #name); \
if (!continue_on_fail && !avs_library.name) \
goto fail;
LOAD_AVS_FUNC(avs_bit_blt, 0);
LOAD_AVS_FUNC(avs_clip_get_error, 0);
LOAD_AVS_FUNC(avs_check_version, 0);
LOAD_AVS_FUNC(avs_create_script_environment, 0);
LOAD_AVS_FUNC(avs_delete_script_environment, 0);
LOAD_AVS_FUNC(avs_get_audio, 0);
LOAD_AVS_FUNC(avs_get_channel_mask, 1);
LOAD_AVS_FUNC(avs_get_error, 1); // New to AviSynth 2.6
LOAD_AVS_FUNC(avs_get_frame, 0);
LOAD_AVS_FUNC(avs_get_version, 0);
LOAD_AVS_FUNC(avs_get_video_info, 0);
LOAD_AVS_FUNC(avs_invoke, 0);
LOAD_AVS_FUNC(avs_is_color_space, 1);
LOAD_AVS_FUNC(avs_release_clip, 0);
LOAD_AVS_FUNC(avs_release_value, 0);
LOAD_AVS_FUNC(avs_release_video_frame, 0);
LOAD_AVS_FUNC(avs_take_clip, 0);
LOAD_AVS_FUNC(avs_bits_per_pixel, 1);
LOAD_AVS_FUNC(avs_get_height_p, 1);
LOAD_AVS_FUNC(avs_get_pitch_p, 1);
LOAD_AVS_FUNC(avs_get_read_ptr_p, 1);
LOAD_AVS_FUNC(avs_get_row_size_p, 1);
LOAD_AVS_FUNC(avs_is_planar_rgb, 1);
LOAD_AVS_FUNC(avs_is_planar_rgba, 1);
LOAD_AVS_FUNC(avs_get_frame_props_ro, 1);
LOAD_AVS_FUNC(avs_prop_get_int, 1);
LOAD_AVS_FUNC(avs_prop_get_type, 1);
LOAD_AVS_FUNC(avs_get_env_property, 1);
#undef LOAD_AVS_FUNC
atexit(avisynth_atexit_handler);
return 0;
fail:
dlclose(avs_library.library);
return AVERROR_UNKNOWN;
}
/* Note that avisynth_context_create and avisynth_context_destroy
* do not allocate or free the actual context! That is taken care of
* by libavformat. */
static av_cold int avisynth_context_create(AVFormatContext *s)
{
AviSynthContext *avs = s->priv_data;
int ret;
if (!avs_library.library)
if (ret = avisynth_load_library())
return ret;
avs->env = avs_library.avs_create_script_environment(3);
if (avs_library.avs_get_error) {
const char *error = avs_library.avs_get_error(avs->env);
if (error) {
av_log(s, AV_LOG_ERROR, "%s\n", error);
return AVERROR_UNKNOWN;
}
}
if (!avs_ctx_list) {
avs_ctx_list = avs;
} else {
avs->next = avs_ctx_list;
avs_ctx_list = avs;
}
return 0;
}
static av_cold void avisynth_context_destroy(AviSynthContext *avs)
{
if (avs_atexit_called)
return;
if (avs == avs_ctx_list) {
avs_ctx_list = avs->next;
} else {
AviSynthContext *prev = avs_ctx_list;
while (prev->next != avs)
prev = prev->next;
prev->next = avs->next;
}
if (avs->clip) {
avs_library.avs_release_clip(avs->clip);
avs->clip = NULL;
}
if (avs->env) {
avs_library.avs_delete_script_environment(avs->env);
avs->env = NULL;
}
}
static av_cold void avisynth_atexit_handler(void)
{
AviSynthContext *avs = avs_ctx_list;
while (avs) {
AviSynthContext *next = avs->next;
avisynth_context_destroy(avs);
avs = next;
}
dlclose(avs_library.library);
avs_atexit_called = 1;
}
/* Create AVStream from audio and video data. */
static int avisynth_create_stream_video(AVFormatContext *s, AVStream *st)
{
AviSynthContext *avs = s->priv_data;
const AVS_Map *avsmap;
AVS_VideoFrame *frame;
int error;
int planar = 0; // 0: packed, 1: YUV, 2: Y8, 3: Planar RGB, 4: YUVA, 5: Planar RGBA
int sar_num = 1;
int sar_den = 1;
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
st->codecpar->width = avs->vi->width;
st->codecpar->height = avs->vi->height;
st->avg_frame_rate = (AVRational) { avs->vi->fps_numerator,
avs->vi->fps_denominator };
st->start_time = 0;
st->duration = avs->vi->num_frames;
st->nb_frames = avs->vi->num_frames;
avpriv_set_pts_info(st, 32, avs->vi->fps_denominator, avs->vi->fps_numerator);
switch (avs->vi->pixel_type) {
/* 10~16-bit YUV pix_fmts (AviSynth+) */
case AVS_CS_YUV444P10:
st->codecpar->format = AV_PIX_FMT_YUV444P10;
planar = 1;
break;
case AVS_CS_YUV422P10:
st->codecpar->format = AV_PIX_FMT_YUV422P10;
planar = 1;
break;
case AVS_CS_YUV420P10:
st->codecpar->format = AV_PIX_FMT_YUV420P10;
planar = 1;
break;
case AVS_CS_YUV444P12:
st->codecpar->format = AV_PIX_FMT_YUV444P12;
planar = 1;
break;
case AVS_CS_YUV422P12:
st->codecpar->format = AV_PIX_FMT_YUV422P12;
planar = 1;
break;
case AVS_CS_YUV420P12:
st->codecpar->format = AV_PIX_FMT_YUV420P12;
planar = 1;
break;
case AVS_CS_YUV444P14:
st->codecpar->format = AV_PIX_FMT_YUV444P14;
planar = 1;
break;
case AVS_CS_YUV422P14:
st->codecpar->format = AV_PIX_FMT_YUV422P14;
planar = 1;
break;
case AVS_CS_YUV420P14:
st->codecpar->format = AV_PIX_FMT_YUV420P14;
planar = 1;
break;
case AVS_CS_YUV444P16:
st->codecpar->format = AV_PIX_FMT_YUV444P16;
planar = 1;
break;
case AVS_CS_YUV422P16:
st->codecpar->format = AV_PIX_FMT_YUV422P16;
planar = 1;
break;
case AVS_CS_YUV420P16:
st->codecpar->format = AV_PIX_FMT_YUV420P16;
planar = 1;
break;
/* 8~16-bit YUV pix_fmts with Alpha (AviSynth+) */
case AVS_CS_YUVA444:
st->codecpar->format = AV_PIX_FMT_YUVA444P;
planar = 4;
break;
case AVS_CS_YUVA422:
st->codecpar->format = AV_PIX_FMT_YUVA422P;
planar = 4;
break;
case AVS_CS_YUVA420:
st->codecpar->format = AV_PIX_FMT_YUVA420P;
planar = 4;
break;
case AVS_CS_YUVA444P10:
st->codecpar->format = AV_PIX_FMT_YUVA444P10;
planar = 4;
break;
case AVS_CS_YUVA422P10:
st->codecpar->format = AV_PIX_FMT_YUVA422P10;
planar = 4;
break;
case AVS_CS_YUVA420P10:
st->codecpar->format = AV_PIX_FMT_YUVA420P10;
planar = 4;
break;
case AVS_CS_YUVA422P12:
st->codecpar->format = AV_PIX_FMT_YUVA422P12;
planar = 4;
break;
case AVS_CS_YUVA444P16:
st->codecpar->format = AV_PIX_FMT_YUVA444P16;
planar = 4;
break;
case AVS_CS_YUVA422P16:
st->codecpar->format = AV_PIX_FMT_YUVA422P16;
planar = 4;
break;
case AVS_CS_YUVA420P16:
st->codecpar->format = AV_PIX_FMT_YUVA420P16;
planar = 4;
break;
/* Planar RGB pix_fmts (AviSynth+) */
case AVS_CS_RGBP:
st->codecpar->format = AV_PIX_FMT_GBRP;
planar = 3;
break;
case AVS_CS_RGBP10:
st->codecpar->format = AV_PIX_FMT_GBRP10;
planar = 3;
break;
case AVS_CS_RGBP12:
st->codecpar->format = AV_PIX_FMT_GBRP12;
planar = 3;
break;
case AVS_CS_RGBP14:
st->codecpar->format = AV_PIX_FMT_GBRP14;
planar = 3;
break;
case AVS_CS_RGBP16:
st->codecpar->format = AV_PIX_FMT_GBRP16;
planar = 3;
break;
/* Single precision floating point Planar RGB (AviSynth+) */
case AVS_CS_RGBPS:
st->codecpar->format = AV_PIX_FMT_GBRPF32;
planar = 3;
break;
/* Planar RGB pix_fmts with Alpha (AviSynth+) */
case AVS_CS_RGBAP:
st->codecpar->format = AV_PIX_FMT_GBRAP;
planar = 5;
break;
case AVS_CS_RGBAP10:
st->codecpar->format = AV_PIX_FMT_GBRAP10;
planar = 5;
break;
case AVS_CS_RGBAP12:
st->codecpar->format = AV_PIX_FMT_GBRAP12;
planar = 5;
break;
case AVS_CS_RGBAP16:
st->codecpar->format = AV_PIX_FMT_GBRAP16;
planar = 5;
break;
/* Single precision floating point Planar RGB with Alpha (AviSynth+) */
case AVS_CS_RGBAPS:
st->codecpar->format = AV_PIX_FMT_GBRAPF32;
planar = 5;
break;
/* 10~16-bit gray pix_fmts (AviSynth+) */
case AVS_CS_Y10:
st->codecpar->format = AV_PIX_FMT_GRAY10;
planar = 2;
break;
case AVS_CS_Y12:
st->codecpar->format = AV_PIX_FMT_GRAY12;
planar = 2;
break;
case AVS_CS_Y14:
st->codecpar->format = AV_PIX_FMT_GRAY14;
planar = 2;
break;
case AVS_CS_Y16:
st->codecpar->format = AV_PIX_FMT_GRAY16;
planar = 2;
break;
/* Single precision floating point gray (AviSynth+) */
case AVS_CS_Y32:
st->codecpar->format = AV_PIX_FMT_GRAYF32;
planar = 2;
break;
/* pix_fmts added in AviSynth 2.6 */
case AVS_CS_YV24:
st->codecpar->format = AV_PIX_FMT_YUV444P;
planar = 1;
break;
case AVS_CS_YV16:
st->codecpar->format = AV_PIX_FMT_YUV422P;
planar = 1;
break;
case AVS_CS_YV411:
st->codecpar->format = AV_PIX_FMT_YUV411P;
planar = 1;
break;
case AVS_CS_Y8:
st->codecpar->format = AV_PIX_FMT_GRAY8;
planar = 2;
break;
/* 16-bit packed RGB pix_fmts (AviSynth+) */
case AVS_CS_BGR48:
st->codecpar->format = AV_PIX_FMT_BGR48;
break;
case AVS_CS_BGR64:
st->codecpar->format = AV_PIX_FMT_BGRA64;
break;
/* AviSynth 2.5 pix_fmts */
case AVS_CS_BGR24:
st->codecpar->format = AV_PIX_FMT_BGR24;
break;
case AVS_CS_BGR32:
st->codecpar->format = AV_PIX_FMT_RGB32;
break;
case AVS_CS_YUY2:
st->codecpar->format = AV_PIX_FMT_YUYV422;
break;
case AVS_CS_YV12:
st->codecpar->format = AV_PIX_FMT_YUV420P;
planar = 1;
break;
case AVS_CS_I420: // Is this even used anywhere?
st->codecpar->format = AV_PIX_FMT_YUV420P;
planar = 1;
break;
default:
av_log(s, AV_LOG_ERROR,
"unknown AviSynth colorspace %d\n", avs->vi->pixel_type);
avs->error = 1;
return AVERROR_UNKNOWN;
}
switch (planar) {
case 5: // Planar RGB + Alpha
avs->n_planes = 4;
avs->planes = avs_planes_rgba;
break;
case 4: // YUV + Alpha
avs->n_planes = 4;
avs->planes = avs_planes_yuva;
break;
case 3: // Planar RGB
avs->n_planes = 3;
avs->planes = avs_planes_rgb;
break;
case 2: // Y8
avs->n_planes = 1;
avs->planes = avs_planes_grey;
break;
case 1: // YUV
avs->n_planes = 3;
avs->planes = avs_planes_yuv;
break;
default:
avs->n_planes = 1;
avs->planes = avs_planes_packed;
}
/* Read AviSynth+'s frame properties to set additional info.
*
* Due to a bug preventing the C interface from accessing frame
* properties in earlier versions of interface version 8, and
* previous attempts at being clever resulting in pre-8 versions
* of AviSynth+ segfaulting, only enable this if we detect
* version 9 at the minimum. Technically, 8.1 works, but the time
* distance between 8.1 and 9 is very small, so just restrict it to 9. */
if (avs_library.avs_get_version(avs->clip) >= 9) {
frame = avs_library.avs_get_frame(avs->clip, 0);
avsmap = avs_library.avs_get_frame_props_ro(avs->env, frame);
/* Field order */
if(avs->flags & AVISYNTH_FRAMEPROP_FIELD_ORDER) {
if(avs_library.avs_prop_get_type(avs->env, avsmap, "_FieldBased") == AVS_PROPTYPE_UNSET) {
st->codecpar->field_order = AV_FIELD_UNKNOWN;
} else {
switch (avs_library.avs_prop_get_int(avs->env, avsmap, "_FieldBased", 0, &error)) {
case 0:
st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
break;
case 1:
st->codecpar->field_order = AV_FIELD_BB;
break;
case 2:
st->codecpar->field_order = AV_FIELD_TT;
break;
default:
st->codecpar->field_order = AV_FIELD_UNKNOWN;
}
}
}
/* Color Range */
if(avs->flags & AVISYNTH_FRAMEPROP_RANGE) {
if(avs_library.avs_prop_get_type(avs->env, avsmap, "_ColorRange") == AVS_PROPTYPE_UNSET) {
st->codecpar->color_range = AVCOL_RANGE_UNSPECIFIED;
} else {
switch (avs_library.avs_prop_get_int(avs->env, avsmap, "_ColorRange", 0, &error)) {
case 0:
st->codecpar->color_range = AVCOL_RANGE_JPEG;
break;
case 1:
st->codecpar->color_range = AVCOL_RANGE_MPEG;
break;
default:
st->codecpar->color_range = AVCOL_RANGE_UNSPECIFIED;
}
}
}
/* Color Primaries */
if(avs->flags & AVISYNTH_FRAMEPROP_PRIMARIES) {
switch (avs_library.avs_prop_get_int(avs->env, avsmap, "_Primaries", 0, &error)) {
case 1:
st->codecpar->color_primaries = AVCOL_PRI_BT709;
break;
case 2:
st->codecpar->color_primaries = AVCOL_PRI_UNSPECIFIED;
break;
case 4:
st->codecpar->color_primaries = AVCOL_PRI_BT470M;
break;
case 5:
st->codecpar->color_primaries = AVCOL_PRI_BT470BG;
break;
case 6:
st->codecpar->color_primaries = AVCOL_PRI_SMPTE170M;
break;
case 7:
st->codecpar->color_primaries = AVCOL_PRI_SMPTE240M;
break;
case 8:
st->codecpar->color_primaries = AVCOL_PRI_FILM;
break;
case 9:
st->codecpar->color_primaries = AVCOL_PRI_BT2020;
break;
case 10:
st->codecpar->color_primaries = AVCOL_PRI_SMPTE428;
break;
case 11:
st->codecpar->color_primaries = AVCOL_PRI_SMPTE431;
break;
case 12:
st->codecpar->color_primaries = AVCOL_PRI_SMPTE432;
break;
case 22:
st->codecpar->color_primaries = AVCOL_PRI_EBU3213;
break;
default:
st->codecpar->color_primaries = AVCOL_PRI_UNSPECIFIED;
}
}
/* Color Transfer Characteristics */
if(avs->flags & AVISYNTH_FRAMEPROP_TRANSFER) {
switch (avs_library.avs_prop_get_int(avs->env, avsmap, "_Transfer", 0, &error)) {
case 1:
st->codecpar->color_trc = AVCOL_TRC_BT709;
break;
case 2:
st->codecpar->color_trc = AVCOL_TRC_UNSPECIFIED;
break;
case 4:
st->codecpar->color_trc = AVCOL_TRC_GAMMA22;
break;
case 5:
st->codecpar->color_trc = AVCOL_TRC_GAMMA28;
break;
case 6:
st->codecpar->color_trc = AVCOL_TRC_SMPTE170M;
break;
case 7:
st->codecpar->color_trc = AVCOL_TRC_SMPTE240M;
break;
case 8:
st->codecpar->color_trc = AVCOL_TRC_LINEAR;
break;
case 9:
st->codecpar->color_trc = AVCOL_TRC_LOG;
break;
case 10:
st->codecpar->color_trc = AVCOL_TRC_LOG_SQRT;
break;
case 11:
st->codecpar->color_trc = AVCOL_TRC_IEC61966_2_4;
break;
case 12:
st->codecpar->color_trc = AVCOL_TRC_BT1361_ECG;
break;
case 13:
st->codecpar->color_trc = AVCOL_TRC_IEC61966_2_1;
break;
case 14:
st->codecpar->color_trc = AVCOL_TRC_BT2020_10;
break;
case 15:
st->codecpar->color_trc = AVCOL_TRC_BT2020_12;
break;
case 16:
st->codecpar->color_trc = AVCOL_TRC_SMPTE2084;
break;
case 17:
st->codecpar->color_trc = AVCOL_TRC_SMPTE428;
break;
case 18:
st->codecpar->color_trc = AVCOL_TRC_ARIB_STD_B67;
break;
default:
st->codecpar->color_trc = AVCOL_TRC_UNSPECIFIED;
}
}
/* Matrix coefficients */
if(avs->flags & AVISYNTH_FRAMEPROP_MATRIX) {
if(avs_library.avs_prop_get_type(avs->env, avsmap, "_Matrix") == AVS_PROPTYPE_UNSET) {
st->codecpar->color_space = AVCOL_SPC_UNSPECIFIED;
} else {
switch (avs_library.avs_prop_get_int(avs->env, avsmap, "_Matrix", 0, &error)) {
case 0:
st->codecpar->color_space = AVCOL_SPC_RGB;
break;
case 1:
st->codecpar->color_space = AVCOL_SPC_BT709;
break;
case 2:
st->codecpar->color_space = AVCOL_SPC_UNSPECIFIED;
break;
case 4:
st->codecpar->color_space = AVCOL_SPC_FCC;
break;
case 5:
st->codecpar->color_space = AVCOL_SPC_BT470BG;
break;
case 6:
st->codecpar->color_space = AVCOL_SPC_SMPTE170M;
break;
case 7:
st->codecpar->color_space = AVCOL_SPC_SMPTE240M;
break;
case 8:
st->codecpar->color_space = AVCOL_SPC_YCGCO;
break;
case 9:
st->codecpar->color_space = AVCOL_SPC_BT2020_NCL;
break;
case 10:
st->codecpar->color_space = AVCOL_SPC_BT2020_CL;
break;
case 11:
st->codecpar->color_space = AVCOL_SPC_SMPTE2085;
break;
case 12:
st->codecpar->color_space = AVCOL_SPC_CHROMA_DERIVED_NCL;
break;
case 13:
st->codecpar->color_space = AVCOL_SPC_CHROMA_DERIVED_CL;
break;
case 14:
st->codecpar->color_space = AVCOL_SPC_ICTCP;
break;
default:
st->codecpar->color_space = AVCOL_SPC_UNSPECIFIED;
}
}
}
/* Chroma Location */
if(avs->flags & AVISYNTH_FRAMEPROP_CHROMA_LOCATION) {
if(avs_library.avs_prop_get_type(avs->env, avsmap, "_ChromaLocation") == AVS_PROPTYPE_UNSET) {
st->codecpar->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
} else {
switch (avs_library.avs_prop_get_int(avs->env, avsmap, "_ChromaLocation", 0, &error)) {
case 0:
st->codecpar->chroma_location = AVCHROMA_LOC_LEFT;
break;
case 1:
st->codecpar->chroma_location = AVCHROMA_LOC_CENTER;
break;
case 2:
st->codecpar->chroma_location = AVCHROMA_LOC_TOPLEFT;
break;
case 3:
st->codecpar->chroma_location = AVCHROMA_LOC_TOP;
break;
case 4:
st->codecpar->chroma_location = AVCHROMA_LOC_BOTTOMLEFT;
break;
case 5:
st->codecpar->chroma_location = AVCHROMA_LOC_BOTTOM;
break;
default:
st->codecpar->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
}
}
}
/* Sample aspect ratio */
if(avs->flags & AVISYNTH_FRAMEPROP_SAR) {
sar_num = avs_library.avs_prop_get_int(avs->env, avsmap, "_SARNum", 0, &error);
sar_den = avs_library.avs_prop_get_int(avs->env, avsmap, "_SARDen", 0, &error);
st->sample_aspect_ratio = (AVRational){ sar_num, sar_den };
}
avs_library.avs_release_video_frame(frame);
} else {
st->codecpar->field_order = AV_FIELD_UNKNOWN;
/* AviSynth works with frame-based video, detecting field order can
* only work when avs_is_field_based returns 'false'. */
av_log(s, AV_LOG_TRACE, "avs_is_field_based: %d\n", avs_is_field_based(avs->vi));
if (avs_is_field_based(avs->vi) == 0) {
if (avs_is_tff(avs->vi)) {
st->codecpar->field_order = AV_FIELD_TT;
}
else if (avs_is_bff(avs->vi)) {
st->codecpar->field_order = AV_FIELD_BB;
}
}
}
return 0;
}
static int avisynth_create_stream_audio(AVFormatContext *s, AVStream *st)
{
AviSynthContext *avs = s->priv_data;
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->sample_rate = avs->vi->audio_samples_per_second;
st->codecpar->ch_layout.nb_channels = avs->vi->nchannels;
st->duration = avs->vi->num_audio_samples;
avpriv_set_pts_info(st, 64, 1, avs->vi->audio_samples_per_second);
if (avs_library.avs_get_version(avs->clip) >= 10)
av_channel_layout_from_mask(&st->codecpar->ch_layout,
avs_library.avs_get_channel_mask(avs->vi));
switch (avs->vi->sample_type) {
case AVS_SAMPLE_INT8:
st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
break;
case AVS_SAMPLE_INT16:
st->codecpar->codec_id = PCM(S16);
break;
case AVS_SAMPLE_INT24:
st->codecpar->codec_id = PCM(S24);
break;
case AVS_SAMPLE_INT32:
st->codecpar->codec_id = PCM(S32);
break;
case AVS_SAMPLE_FLOAT:
st->codecpar->codec_id = PCM(F32);
break;
default:
av_log(s, AV_LOG_ERROR,
"unknown AviSynth sample type %d\n", avs->vi->sample_type);
avs->error = 1;
return AVERROR_UNKNOWN;
}
return 0;
}
static int avisynth_create_stream(AVFormatContext *s)
{
AviSynthContext *avs = s->priv_data;
AVStream *st;
int ret;
int id = 0;
if (avs_has_video(avs->vi)) {
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR_UNKNOWN;
st->id = id++;
if (ret = avisynth_create_stream_video(s, st))
return ret;
}
if (avs_has_audio(avs->vi)) {
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR_UNKNOWN;
st->id = id++;
if (ret = avisynth_create_stream_audio(s, st))
return ret;
}
return 0;
}
static int avisynth_open_file(AVFormatContext *s)
{
AviSynthContext *avs = s->priv_data;
AVS_Value val;
int ret;
if (ret = avisynth_context_create(s))
return ret;
if (!avs_library.avs_check_version(avs->env, 7)) {
AVS_Value args[] = {
avs_new_value_string(s->url),
avs_new_value_bool(1) // filename is in UTF-8
};
val = avs_library.avs_invoke(avs->env, "Import",
avs_new_value_array(args, 2), 0);
} else {
AVS_Value arg;
#ifdef _WIN32
char *filename_ansi;
/* Convert UTF-8 to ANSI code page */
if (utf8toansi(s->url, &filename_ansi)) {
ret = AVERROR_UNKNOWN;
goto fail;
}
arg = avs_new_value_string(filename_ansi);
#else
arg = avs_new_value_string(s->url);
#endif
val = avs_library.avs_invoke(avs->env, "Import", arg, 0);
#ifdef _WIN32
av_free(filename_ansi);
#endif
}
if (avs_is_error(val)) {
av_log(s, AV_LOG_ERROR, "%s\n", avs_as_error(val));
ret = AVERROR_UNKNOWN;
goto fail;
}
if (!avs_is_clip(val)) {
av_log(s, AV_LOG_ERROR, "AviSynth script did not return a clip\n");
ret = AVERROR_UNKNOWN;
goto fail;
}
avs->clip = avs_library.avs_take_clip(val, avs->env);
avs->vi = avs_library.avs_get_video_info(avs->clip);
/* On Windows, FFmpeg supports AviSynth interface version 6 or higher.
* This includes AviSynth 2.6 RC1 or higher, and AviSynth+ r1718 or higher,
* and excludes 2.5 and the 2.6 alphas. */
if (avs_library.avs_get_version(avs->clip) < 6) {
av_log(s, AV_LOG_ERROR,
"AviSynth version is too old. Please upgrade to either AviSynth 2.6 >= RC1 or AviSynth+ >= r1718.\n");
ret = AVERROR_UNKNOWN;
goto fail;
}
/* Release the AVS_Value as it will go out of scope. */
avs_library.avs_release_value(val);
if (ret = avisynth_create_stream(s))
goto fail;
return 0;
fail:
avisynth_context_destroy(avs);
return ret;
}
static void avisynth_next_stream(AVFormatContext *s, AVStream **st,
AVPacket *pkt, int *discard)
{
AviSynthContext *avs = s->priv_data;
avs->curr_stream++;
avs->curr_stream %= s->nb_streams;
*st = s->streams[avs->curr_stream];
if ((*st)->discard == AVDISCARD_ALL)
*discard = 1;
else
*discard = 0;
return;
}
/* Copy AviSynth clip data into an AVPacket. */
static int avisynth_read_packet_video(AVFormatContext *s, AVPacket *pkt,
int discard)
{
AviSynthContext *avs = s->priv_data;
AVS_VideoFrame *frame;
unsigned char *dst_p;
const unsigned char *src_p;
int n, i, plane, rowsize, planeheight, pitch, bits, ret;
const char *error;
if (avs->curr_frame >= avs->vi->num_frames)
return AVERROR_EOF;
/* This must happen even if the stream is discarded to prevent desync. */
n = avs->curr_frame++;
if (discard)
return 0;
bits = avs_library.avs_bits_per_pixel(avs->vi);
/* Without the cast to int64_t, calculation overflows at about 9k x 9k
* resolution. */
pkt->size = (((int64_t)avs->vi->width *
(int64_t)avs->vi->height) * bits) / 8;
if (!pkt->size)
return AVERROR_UNKNOWN;
if ((ret = av_new_packet(pkt, pkt->size)) < 0)
return ret;
pkt->pts = n;
pkt->dts = n;
pkt->duration = 1;
pkt->stream_index = avs->curr_stream;
frame = avs_library.avs_get_frame(avs->clip, n);
error = avs_library.avs_clip_get_error(avs->clip);
if (error) {
av_log(s, AV_LOG_ERROR, "%s\n", error);
avs->error = 1;
av_packet_unref(pkt);
return AVERROR_UNKNOWN;
}
dst_p = pkt->data;
for (i = 0; i < avs->n_planes; i++) {
plane = avs->planes[i];
src_p = avs_library.avs_get_read_ptr_p(frame, plane);
pitch = avs_library.avs_get_pitch_p(frame, plane);
rowsize = avs_library.avs_get_row_size_p(frame, plane);
planeheight = avs_library.avs_get_height_p(frame, plane);
/* Flip RGB video. */
if (avs_library.avs_is_color_space(avs->vi, AVS_CS_BGR) ||
avs_library.avs_is_color_space(avs->vi, AVS_CS_BGR48) ||
avs_library.avs_is_color_space(avs->vi, AVS_CS_BGR64)) {
src_p = src_p + (planeheight - 1) * pitch;
pitch = -pitch;
}
avs_library.avs_bit_blt(avs->env, dst_p, rowsize, src_p, pitch,
rowsize, planeheight);
dst_p += rowsize * planeheight;
}
avs_library.avs_release_video_frame(frame);
return 0;
}
static int avisynth_read_packet_audio(AVFormatContext *s, AVPacket *pkt,
int discard)
{
AviSynthContext *avs = s->priv_data;
AVRational fps, samplerate;
int samples, ret;
int64_t n;
const char *error;
if (avs->curr_sample >= avs->vi->num_audio_samples)
return AVERROR_EOF;
fps.num = avs->vi->fps_numerator;
fps.den = avs->vi->fps_denominator;
samplerate.num = avs->vi->audio_samples_per_second;
samplerate.den = 1;
if (avs_has_video(avs->vi)) {
if (avs->curr_frame < avs->vi->num_frames)
samples = av_rescale_q(avs->curr_frame, samplerate, fps) -
avs->curr_sample;
else
samples = av_rescale_q(1, samplerate, fps);
} else {
samples = 1000;
}
/* After seeking, audio may catch up with video. */
if (samples <= 0) {
pkt->size = 0;
pkt->data = NULL;
return 0;
}
if (avs->curr_sample + samples > avs->vi->num_audio_samples)
samples = avs->vi->num_audio_samples - avs->curr_sample;
/* This must happen even if the stream is discarded to prevent desync. */
n = avs->curr_sample;
avs->curr_sample += samples;
if (discard)
return 0;
pkt->size = avs_bytes_per_channel_sample(avs->vi) *
samples * avs->vi->nchannels;
if (!pkt->size)
return AVERROR_UNKNOWN;
if ((ret = av_new_packet(pkt, pkt->size)) < 0)
return ret;
pkt->pts = n;
pkt->dts = n;
pkt->duration = samples;
pkt->stream_index = avs->curr_stream;
avs_library.avs_get_audio(avs->clip, pkt->data, n, samples);
error = avs_library.avs_clip_get_error(avs->clip);
if (error) {
av_log(s, AV_LOG_ERROR, "%s\n", error);
avs->error = 1;
av_packet_unref(pkt);
return AVERROR_UNKNOWN;
}
return 0;
}
static av_cold int avisynth_read_header(AVFormatContext *s)
{
int ret;
// Calling library must implement a lock for thread-safe opens.
if (ret = ff_lock_avformat())
return ret;
if (ret = avisynth_open_file(s)) {
ff_unlock_avformat();
return ret;
}
ff_unlock_avformat();
return 0;
}
static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AviSynthContext *avs = s->priv_data;
AVStream *st;
int discard = 0;
int ret;
if (avs->error)
return AVERROR_UNKNOWN;
/* If either stream reaches EOF, try to read the other one before
* giving up. */
avisynth_next_stream(s, &st, pkt, &discard);
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
ret = avisynth_read_packet_video(s, pkt, discard);
if (ret == AVERROR_EOF && avs_has_audio(avs->vi)) {
avisynth_next_stream(s, &st, pkt, &discard);
return avisynth_read_packet_audio(s, pkt, discard);
}
} else {
ret = avisynth_read_packet_audio(s, pkt, discard);
if (ret == AVERROR_EOF && avs_has_video(avs->vi)) {
avisynth_next_stream(s, &st, pkt, &discard);
return avisynth_read_packet_video(s, pkt, discard);
}
}
return ret;
}
static av_cold int avisynth_read_close(AVFormatContext *s)
{
if (ff_lock_avformat())
return AVERROR_UNKNOWN;
avisynth_context_destroy(s->priv_data);
ff_unlock_avformat();
return 0;
}
static int avisynth_read_seek(AVFormatContext *s, int stream_index,
int64_t timestamp, int flags)
{
AviSynthContext *avs = s->priv_data;
AVStream *st;
AVRational fps, samplerate;
if (avs->error)
return AVERROR_UNKNOWN;
fps = (AVRational) { avs->vi->fps_numerator,
avs->vi->fps_denominator };
samplerate = (AVRational) { avs->vi->audio_samples_per_second, 1 };
st = s->streams[stream_index];
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
/* AviSynth frame counts are signed int. */
if ((timestamp >= avs->vi->num_frames) ||
(timestamp > INT_MAX) ||
(timestamp < 0))
return AVERROR_EOF;
avs->curr_frame = timestamp;
if (avs_has_audio(avs->vi))
avs->curr_sample = av_rescale_q(timestamp, samplerate, fps);
} else {
if ((timestamp >= avs->vi->num_audio_samples) || (timestamp < 0))
return AVERROR_EOF;
/* Force frame granularity for seeking. */
if (avs_has_video(avs->vi)) {
avs->curr_frame = av_rescale_q(timestamp, fps, samplerate);
avs->curr_sample = av_rescale_q(avs->curr_frame, samplerate, fps);
} else {
avs->curr_sample = timestamp;
}
}
return 0;
}
#define AVISYNTH_FRAMEPROP_DEFAULT AVISYNTH_FRAMEPROP_FIELD_ORDER | AVISYNTH_FRAMEPROP_RANGE | \
AVISYNTH_FRAMEPROP_PRIMARIES | AVISYNTH_FRAMEPROP_TRANSFER | \
AVISYNTH_FRAMEPROP_MATRIX | AVISYNTH_FRAMEPROP_CHROMA_LOCATION
#define OFFSET(x) offsetof(AviSynthContext, x)
static const AVOption avisynth_options[] = {
{ "avisynth_flags", "set flags related to reading frame properties from script (AviSynth+ v3.7.1 or higher)", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = AVISYNTH_FRAMEPROP_DEFAULT}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "field_order", "read field order", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_FIELD_ORDER}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "range", "read color range", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_RANGE}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "primaries", "read color primaries", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_PRIMARIES}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "transfer", "read color transfer characteristics", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_TRANSFER}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "matrix", "read matrix coefficients", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_MATRIX}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "chroma_location", "read chroma location", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_CHROMA_LOCATION}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ "sar", "read sample aspect ratio", 0, AV_OPT_TYPE_CONST, {.i64 = AVISYNTH_FRAMEPROP_SAR}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, .unit = "flags" },
{ NULL },
};
static const AVClass avisynth_demuxer_class = {
.class_name = "AviSynth demuxer",
.item_name = av_default_item_name,
.option = avisynth_options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFInputFormat ff_avisynth_demuxer = {
.p.name = "avisynth",
.p.long_name = NULL_IF_CONFIG_SMALL("AviSynth script"),
.p.extensions = "avs",
.p.priv_class = &avisynth_demuxer_class,
.priv_data_size = sizeof(AviSynthContext),
.read_header = avisynth_read_header,
.read_packet = avisynth_read_packet,
.read_close = avisynth_read_close,
.read_seek = avisynth_read_seek,
};
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