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mpv/video/out/gl_video.c

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*
* You can alternatively redistribute this file 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.
*/
#include <assert.h>
#include <math.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <libavutil/common.h>
#include <libavutil/lfg.h>
#include "gl_video.h"
#include "misc/bstr.h"
#include "gl_common.h"
#include "gl_utils.h"
#include "gl_hwdec.h"
#include "gl_osd.h"
#include "filter_kernels.h"
#include "aspect.h"
#include "bitmap_packer.h"
#include "dither.h"
// Pixel width of 1D lookup textures.
#define LOOKUP_TEXTURE_SIZE 256
// Texture units 0-5 are used by the video, and for free use by the passes
#define TEXUNIT_VIDEO_NUM 6
// Other texture units are reserved for specific purposes
#define TEXUNIT_SCALERS TEXUNIT_VIDEO_NUM
#define TEXUNIT_3DLUT (TEXUNIT_SCALERS+4)
#define TEXUNIT_DITHER (TEXUNIT_3DLUT+1)
// scale/cscale arguments that map directly to shader filter routines.
// Note that the convolution filters are not included in this list.
static const char *const fixed_scale_filters[] = {
"bilinear",
"bicubic_fast",
"sharpen3",
"sharpen5",
"oversample",
"custom",
NULL
};
static const char *const fixed_tscale_filters[] = {
"oversample",
NULL
};
// must be sorted, and terminated with 0
int filter_sizes[] =
{2, 4, 6, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 0};
int tscale_sizes[] = {2, 4, 6, 0}; // limited by TEXUNIT_VIDEO_NUM
struct vertex_pt {
float x, y;
};
struct vertex {
struct vertex_pt position;
struct vertex_pt texcoord[TEXUNIT_VIDEO_NUM];
};
static const struct gl_vao_entry vertex_vao[] = {
{"position", 2, GL_FLOAT, false, offsetof(struct vertex, position)},
{"texcoord0", 2, GL_FLOAT, false, offsetof(struct vertex, texcoord[0])},
{"texcoord1", 2, GL_FLOAT, false, offsetof(struct vertex, texcoord[1])},
{"texcoord2", 2, GL_FLOAT, false, offsetof(struct vertex, texcoord[2])},
{"texcoord3", 2, GL_FLOAT, false, offsetof(struct vertex, texcoord[3])},
{"texcoord4", 2, GL_FLOAT, false, offsetof(struct vertex, texcoord[4])},
{"texcoord5", 2, GL_FLOAT, false, offsetof(struct vertex, texcoord[5])},
{0}
};
struct texplane {
int w, h;
int tex_w, tex_h;
GLint gl_internal_format;
GLenum gl_target;
GLenum gl_format;
GLenum gl_type;
GLuint gl_texture;
int gl_buffer;
int buffer_size;
void *buffer_ptr;
};
struct video_image {
struct texplane planes[4];
bool image_flipped;
bool needs_upload;
struct mp_image *mpi; // original input image
};
struct scaler {
int index;
struct scaler_config conf;
double scale_factor;
bool initialized;
struct filter_kernel *kernel;
GLuint gl_lut;
GLenum gl_target;
struct fbotex sep_fbo;
bool insufficient;
// kernel points here
struct filter_kernel kernel_storage;
};
struct fbosurface {
struct fbotex fbotex;
int64_t pts;
double vpts; // used for synchronizing subtitles only
};
#define FBOSURFACES_MAX 10
struct src_tex {
GLuint gl_tex;
GLenum gl_target;
int tex_w, tex_h;
struct mp_rect_f src;
};
struct gl_video {
GL *gl;
struct mpv_global *global;
struct mp_log *log;
struct gl_video_opts opts;
bool gl_debug;
int depth_g;
int texture_16bit_depth; // actual bits available in 16 bit textures
struct gl_shader_cache *sc;
GLenum gl_target; // texture target (GL_TEXTURE_2D, ...) for video and FBOs
struct gl_vao vao;
struct osd_state *osd_state;
struct mpgl_osd *osd;
double osd_pts;
GLuint lut_3d_texture;
bool use_lut_3d;
GLuint dither_texture;
int dither_size;
struct mp_image_params real_image_params; // configured format
struct mp_image_params image_params; // texture format (mind hwdec case)
struct mp_imgfmt_desc image_desc;
int plane_count;
int image_w, image_h;
bool is_yuv, is_rgb, is_packed_yuv;
bool has_alpha;
char color_swizzle[5];
struct video_image image;
struct fbotex chroma_merge_fbo;
struct fbotex source_fbo;
struct fbotex indirect_fbo;
struct fbotex blend_subs_fbo;
struct fbosurface surfaces[FBOSURFACES_MAX];
// these are duplicated so we can keep rendering back and forth between
// them to support an unlimited number of shader passes per step
struct fbotex pre_fbo[2];
struct fbotex post_fbo[2];
int surface_idx;
int surface_now;
bool is_interpolated;
// state for luma (0), luma-down(1), chroma (2) and temporal (3) scalers
struct scaler scaler[4];
struct mp_csp_equalizer video_eq;
struct mp_rect src_rect; // displayed part of the source video
struct mp_rect dst_rect; // video rectangle on output window
struct mp_osd_res osd_rect; // OSD size/margins
int vp_w, vp_h;
// temporary during rendering
struct src_tex pass_tex[TEXUNIT_VIDEO_NUM];
bool use_indirect;
bool use_linear;
bool use_normalized_range;
float user_gamma;
struct fbotex copy_fbos[4];
int frames_uploaded;
int frames_rendered;
AVLFG lfg;
// Cached because computing it can take relatively long
int last_dither_matrix_size;
float *last_dither_matrix;
struct gl_hwdec *hwdec;
bool hwdec_active;
};
struct fmt_entry {
int mp_format;
GLint internal_format;
GLenum format;
GLenum type;
};
// Very special formats, for which OpenGL happens to have direct support
static const struct fmt_entry mp_to_gl_formats[] = {
{IMGFMT_BGR555, GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV},
{IMGFMT_BGR565, GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV},
{IMGFMT_RGB555, GL_RGBA, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV},
{IMGFMT_RGB565, GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5},
{0},
};
static const struct fmt_entry gl_byte_formats[] = {
{0, GL_RED, GL_RED, GL_UNSIGNED_BYTE}, // 1 x 8
{0, GL_RG, GL_RG, GL_UNSIGNED_BYTE}, // 2 x 8
{0, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE}, // 3 x 8
{0, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE}, // 4 x 8
{0, GL_R16, GL_RED, GL_UNSIGNED_SHORT}, // 1 x 16
{0, GL_RG16, GL_RG, GL_UNSIGNED_SHORT}, // 2 x 16
{0, GL_RGB16, GL_RGB, GL_UNSIGNED_SHORT}, // 3 x 16
{0, GL_RGBA16, GL_RGBA, GL_UNSIGNED_SHORT}, // 4 x 16
};
static const struct fmt_entry gl_byte_formats_gles3[] = {
{0, GL_R8, GL_RED, GL_UNSIGNED_BYTE}, // 1 x 8
{0, GL_RG8, GL_RG, GL_UNSIGNED_BYTE}, // 2 x 8
{0, GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE}, // 3 x 8
{0, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE}, // 4 x 8
// There are no filterable texture formats that can be uploaded as
// GL_UNSIGNED_SHORT, so apparently we're out of luck.
{0, 0, 0, 0}, // 1 x 16
{0, 0, 0, 0}, // 2 x 16
{0, 0, 0, 0}, // 3 x 16
{0, 0, 0, 0}, // 4 x 16
};
static const struct fmt_entry gl_byte_formats_gles2[] = {
{0, GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE}, // 1 x 8
{0, GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE}, // 2 x 8
{0, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE}, // 3 x 8
{0, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE}, // 4 x 8
{0, 0, 0, 0}, // 1 x 16
{0, 0, 0, 0}, // 2 x 16
{0, 0, 0, 0}, // 3 x 16
{0, 0, 0, 0}, // 4 x 16
};
static const struct fmt_entry gl_byte_formats_legacy[] = {
{0, GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE}, // 1 x 8
{0, GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE}, // 2 x 8
{0, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE}, // 3 x 8
{0, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE}, // 4 x 8
{0, GL_LUMINANCE16, GL_LUMINANCE, GL_UNSIGNED_SHORT},// 1 x 16
{0, GL_LUMINANCE16_ALPHA16, GL_LUMINANCE_ALPHA, GL_UNSIGNED_SHORT},// 2 x 16
{0, GL_RGB16, GL_RGB, GL_UNSIGNED_SHORT},// 3 x 16
{0, GL_RGBA16, GL_RGBA, GL_UNSIGNED_SHORT},// 4 x 16
};
static const struct fmt_entry gl_float16_formats[] = {
{0, GL_R16F, GL_RED, GL_FLOAT}, // 1 x f
{0, GL_RG16F, GL_RG, GL_FLOAT}, // 2 x f
{0, GL_RGB16F, GL_RGB, GL_FLOAT}, // 3 x f
{0, GL_RGBA16F, GL_RGBA, GL_FLOAT}, // 4 x f
};
static const struct fmt_entry gl_apple_formats[] = {
{IMGFMT_UYVY, GL_RGB, GL_RGB_422_APPLE, GL_UNSIGNED_SHORT_8_8_APPLE},
{IMGFMT_YUYV, GL_RGB, GL_RGB_422_APPLE, GL_UNSIGNED_SHORT_8_8_REV_APPLE},
{0}
};
struct packed_fmt_entry {
int fmt;
int8_t component_size;
int8_t components[4]; // source component - 0 means unmapped
};
static const struct packed_fmt_entry mp_packed_formats[] = {
// w R G B A
{IMGFMT_Y8, 1, {1, 0, 0, 0}},
{IMGFMT_Y16, 2, {1, 0, 0, 0}},
{IMGFMT_YA8, 1, {1, 0, 0, 2}},
{IMGFMT_YA16, 2, {1, 0, 0, 2}},
{IMGFMT_ARGB, 1, {2, 3, 4, 1}},
{IMGFMT_0RGB, 1, {2, 3, 4, 0}},
{IMGFMT_BGRA, 1, {3, 2, 1, 4}},
{IMGFMT_BGR0, 1, {3, 2, 1, 0}},
{IMGFMT_ABGR, 1, {4, 3, 2, 1}},
{IMGFMT_0BGR, 1, {4, 3, 2, 0}},
{IMGFMT_RGBA, 1, {1, 2, 3, 4}},
{IMGFMT_RGB0, 1, {1, 2, 3, 0}},
{IMGFMT_BGR24, 1, {3, 2, 1, 0}},
{IMGFMT_RGB24, 1, {1, 2, 3, 0}},
{IMGFMT_RGB48, 2, {1, 2, 3, 0}},
{IMGFMT_RGBA64, 2, {1, 2, 3, 4}},
{IMGFMT_BGRA64, 2, {3, 2, 1, 4}},
{0},
};
const struct gl_video_opts gl_video_opts_def = {
.dither_depth = -1,
.dither_size = 6,
.fbo_format = GL_RGBA16,
.sigmoid_center = 0.75,
.sigmoid_slope = 6.5,
.scaler = {
{{"bilinear", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // scale
{{NULL, .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // dscale
{{"bilinear", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // cscale
{{"oversample", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // tscale
},
.alpha_mode = 2,
.background = {0, 0, 0, 255},
.gamma = 1.0f,
};
const struct gl_video_opts gl_video_opts_hq_def = {
.dither_depth = 0,
.dither_size = 6,
.fbo_format = GL_RGBA16,
.fancy_downscaling = 1,
.sigmoid_center = 0.75,
.sigmoid_slope = 6.5,
.sigmoid_upscaling = 1,
.scaler = {
{{"spline36", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // scale
{{"mitchell", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // dscale
{{"spline36", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // cscale
{{"oversample", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // tscale
},
.alpha_mode = 2,
.background = {0, 0, 0, 255},
.gamma = 1.0f,
.blend_subs = 0,
};
static int validate_scaler_opt(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param);
static int validate_window_opt(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param);
#define OPT_BASE_STRUCT struct gl_video_opts
const struct m_sub_options gl_video_conf = {
.opts = (const m_option_t[]) {
OPT_FLOATRANGE("gamma", gamma, 0, 0.1, 2.0),
OPT_FLAG("gamma-auto", gamma_auto, 0),
OPT_CHOICE_C("target-prim", target_prim, 0, mp_csp_prim_names),
OPT_CHOICE_C("target-trc", target_trc, 0, mp_csp_trc_names),
OPT_FLAG("pbo", pbo, 0),
OPT_STRING_VALIDATE("scale", scaler[0].kernel.name, 0, validate_scaler_opt),
OPT_STRING_VALIDATE("dscale", scaler[1].kernel.name, 0, validate_scaler_opt),
OPT_STRING_VALIDATE("cscale", scaler[2].kernel.name, 0, validate_scaler_opt),
OPT_STRING_VALIDATE("tscale", scaler[3].kernel.name, 0, validate_scaler_opt),
OPT_FLOAT("scale-param1", scaler[0].kernel.params[0], 0),
OPT_FLOAT("scale-param2", scaler[0].kernel.params[1], 0),
OPT_FLOAT("dscale-param1", scaler[1].kernel.params[0], 0),
OPT_FLOAT("dscale-param2", scaler[1].kernel.params[1], 0),
OPT_FLOAT("cscale-param1", scaler[2].kernel.params[0], 0),
OPT_FLOAT("cscale-param2", scaler[2].kernel.params[1], 0),
OPT_FLOAT("tscale-param1", scaler[3].kernel.params[0], 0),
OPT_FLOAT("tscale-param2", scaler[3].kernel.params[1], 0),
OPT_FLOAT("scale-blur", scaler[0].kernel.blur, 0),
OPT_FLOAT("dscale-blur", scaler[1].kernel.blur, 0),
OPT_FLOAT("cscale-blur", scaler[2].kernel.blur, 0),
OPT_FLOAT("tscale-blur", scaler[3].kernel.blur, 0),
OPT_STRING_VALIDATE("scale-window", scaler[0].window.name, 0, validate_window_opt),
OPT_STRING_VALIDATE("dscale-window", scaler[1].window.name, 0, validate_window_opt),
OPT_STRING_VALIDATE("cscale-window", scaler[2].window.name, 0, validate_window_opt),
OPT_STRING_VALIDATE("tscale-window", scaler[3].window.name, 0, validate_window_opt),
OPT_FLOAT("scale-wparam", scaler[0].window.params[0], 0),
OPT_FLOAT("dscale-wparam", scaler[1].window.params[0], 0),
OPT_FLOAT("cscale-wparam", scaler[2].window.params[0], 0),
OPT_FLOAT("tscale-wparam", scaler[3].window.params[0], 0),
OPT_FLOATRANGE("scale-radius", scaler[0].radius, 0, 0.5, 16.0),
OPT_FLOATRANGE("dscale-radius", scaler[1].radius, 0, 0.5, 16.0),
OPT_FLOATRANGE("cscale-radius", scaler[2].radius, 0, 0.5, 16.0),
OPT_FLOATRANGE("tscale-radius", scaler[3].radius, 0, 0.5, 3.0),
OPT_FLOATRANGE("scale-antiring", scaler[0].antiring, 0, 0.0, 1.0),
OPT_FLOATRANGE("dscale-antiring", scaler[1].antiring, 0, 0.0, 1.0),
OPT_FLOATRANGE("cscale-antiring", scaler[2].antiring, 0, 0.0, 1.0),
OPT_FLOATRANGE("tscale-antiring", scaler[3].antiring, 0, 0.0, 1.0),
OPT_FLAG("scaler-resizes-only", scaler_resizes_only, 0),
OPT_FLAG("linear-scaling", linear_scaling, 0),
OPT_FLAG("fancy-downscaling", fancy_downscaling, 0),
OPT_FLAG("sigmoid-upscaling", sigmoid_upscaling, 0),
OPT_FLOATRANGE("sigmoid-center", sigmoid_center, 0, 0.0, 1.0),
OPT_FLOATRANGE("sigmoid-slope", sigmoid_slope, 0, 1.0, 20.0),
OPT_CHOICE("fbo-format", fbo_format, 0,
({"rgb", GL_RGB},
{"rgba", GL_RGBA},
{"rgb8", GL_RGB8},
{"rgb10", GL_RGB10},
{"rgb10_a2", GL_RGB10_A2},
{"rgb16", GL_RGB16},
{"rgb16f", GL_RGB16F},
{"rgb32f", GL_RGB32F},
{"rgba12", GL_RGBA12},
{"rgba16", GL_RGBA16},
{"rgba16f", GL_RGBA16F},
{"rgba32f", GL_RGBA32F})),
OPT_CHOICE_OR_INT("dither-depth", dither_depth, 0, -1, 16,
({"no", -1}, {"auto", 0})),
OPT_CHOICE("dither", dither_algo, 0,
({"fruit", 0}, {"ordered", 1}, {"no", -1})),
OPT_INTRANGE("dither-size-fruit", dither_size, 0, 2, 8),
OPT_FLAG("temporal-dither", temporal_dither, 0),
OPT_CHOICE("alpha", alpha_mode, 0,
({"no", 0},
{"yes", 1},
{"blend", 2})),
OPT_FLAG("rectangle-textures", use_rectangle, 0),
OPT_COLOR("background", background, 0),
OPT_FLAG("interpolation", interpolation, 0),
OPT_CHOICE("blend-subtitles", blend_subs, 0,
({"no", 0},
{"yes", 1},
{"video", 2})),
OPT_STRING("source-shader", source_shader, 0),
OPT_STRING("scale-shader", scale_shader, 0),
OPT_STRINGLIST("pre-shaders", pre_shaders, 0),
OPT_STRINGLIST("post-shaders", post_shaders, 0),
OPT_REMOVED("approx-gamma", "this is always enabled now"),
OPT_REMOVED("cscale-down", "chroma is never downscaled"),
OPT_REMOVED("scale-sep", "this is set automatically whenever sane"),
OPT_REMOVED("indirect", "this is set automatically whenever sane"),
OPT_REMOVED("srgb", "use target-prim=bt709:target-trc=srgb instead"),
OPT_REPLACED("lscale", "scale"),
OPT_REPLACED("lscale-down", "scale-down"),
OPT_REPLACED("lparam1", "scale-param1"),
OPT_REPLACED("lparam2", "scale-param2"),
OPT_REPLACED("lradius", "scale-radius"),
OPT_REPLACED("lantiring", "scale-antiring"),
OPT_REPLACED("cparam1", "cscale-param1"),
OPT_REPLACED("cparam2", "cscale-param2"),
OPT_REPLACED("cradius", "cscale-radius"),
OPT_REPLACED("cantiring", "cscale-antiring"),
OPT_REPLACED("smoothmotion", "interpolation"),
OPT_REPLACED("smoothmotion-threshold", "tscale-param1"),
OPT_REPLACED("scale-down", "dscale"),
{0}
},
.size = sizeof(struct gl_video_opts),
.defaults = &gl_video_opts_def,
};
static void uninit_rendering(struct gl_video *p);
static void uninit_scaler(struct gl_video *p, struct scaler *scaler);
static void check_gl_features(struct gl_video *p);
static bool init_format(int fmt, struct gl_video *init);
static void gl_video_upload_image(struct gl_video *p);
#define GLSL(x) gl_sc_add(p->sc, #x "\n");
#define GLSLF(...) gl_sc_addf(p->sc, __VA_ARGS__)
static const struct fmt_entry *find_tex_format(GL *gl, int bytes_per_comp,
int n_channels)
{
assert(bytes_per_comp == 1 || bytes_per_comp == 2);
assert(n_channels >= 1 && n_channels <= 4);
const struct fmt_entry *fmts = gl_byte_formats;
if (gl->es >= 300) {
fmts = gl_byte_formats_gles3;
} else if (gl->es) {
fmts = gl_byte_formats_gles2;
} else if (!(gl->mpgl_caps & MPGL_CAP_TEX_RG)) {
fmts = gl_byte_formats_legacy;
}
return &fmts[n_channels - 1 + (bytes_per_comp - 1) * 4];
}
static void debug_check_gl(struct gl_video *p, const char *msg)
{
if (p->gl_debug)
glCheckError(p->gl, p->log, msg);
}
void gl_video_set_debug(struct gl_video *p, bool enable)
{
GL *gl = p->gl;
p->gl_debug = enable;
if (p->gl->debug_context)
gl_set_debug_logger(gl, enable ? p->log : NULL);
}
static void gl_video_reset_surfaces(struct gl_video *p)
{
for (int i = 0; i < FBOSURFACES_MAX; i++) {
p->surfaces[i].pts = 0;
p->surfaces[i].vpts = MP_NOPTS_VALUE;
}
p->surface_idx = 0;
p->surface_now = 0;
}
static inline int fbosurface_wrap(int id)
{
id = id % FBOSURFACES_MAX;
return id < 0 ? id + FBOSURFACES_MAX : id;
}
static void recreate_osd(struct gl_video *p)
{
mpgl_osd_destroy(p->osd);
p->osd = NULL;
if (p->osd_state) {
p->osd = mpgl_osd_init(p->gl, p->log, p->osd_state);
mpgl_osd_set_options(p->osd, p->opts.pbo);
}
}
static void reinit_rendering(struct gl_video *p)
{
MP_VERBOSE(p, "Reinit rendering.\n");
debug_check_gl(p, "before scaler initialization");
uninit_rendering(p);
recreate_osd(p);
}
static void uninit_rendering(struct gl_video *p)
{
GL *gl = p->gl;
for (int n = 0; n < 4; n++)
uninit_scaler(p, &p->scaler[n]);
gl->DeleteTextures(1, &p->dither_texture);
p->dither_texture = 0;
fbotex_uninit(&p->chroma_merge_fbo);
fbotex_uninit(&p->source_fbo);
fbotex_uninit(&p->indirect_fbo);
fbotex_uninit(&p->blend_subs_fbo);
for (int n = 0; n < 2; n++) {
fbotex_uninit(&p->pre_fbo[n]);
fbotex_uninit(&p->post_fbo[n]);
}
for (int n = 0; n < FBOSURFACES_MAX; n++)
fbotex_uninit(&p->surfaces[n].fbotex);
for (int n = 0; n < 4; n++)
fbotex_uninit(&p->copy_fbos[n]);
gl_video_reset_surfaces(p);
}
void gl_video_set_lut3d(struct gl_video *p, struct lut3d *lut3d)
{
GL *gl = p->gl;
if (!lut3d) {
if (p->use_lut_3d) {
p->use_lut_3d = false;
reinit_rendering(p);
}
return;
}
if (!(gl->mpgl_caps & MPGL_CAP_3D_TEX))
return;
if (!p->lut_3d_texture)
gl->GenTextures(1, &p->lut_3d_texture);
gl->ActiveTexture(GL_TEXTURE0 + TEXUNIT_3DLUT);
gl->BindTexture(GL_TEXTURE_3D, p->lut_3d_texture);
gl->TexImage3D(GL_TEXTURE_3D, 0, GL_RGB16, lut3d->size[0], lut3d->size[1],
lut3d->size[2], 0, GL_RGB, GL_UNSIGNED_SHORT, lut3d->data);
gl->TexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
gl->TexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
gl->ActiveTexture(GL_TEXTURE0);
p->use_lut_3d = true;
check_gl_features(p);
debug_check_gl(p, "after 3d lut creation");
reinit_rendering(p);
}
static void pass_load_fbotex(struct gl_video *p, struct fbotex *src_fbo, int id,
int w, int h)
{
p->pass_tex[id] = (struct src_tex){
.gl_tex = src_fbo->texture,
.gl_target = GL_TEXTURE_2D,
.tex_w = src_fbo->tex_w,
.tex_h = src_fbo->tex_h,
.src = {0, 0, w, h},
};
}
static void pass_set_image_textures(struct gl_video *p, struct video_image *vimg,
struct gl_transform *chroma)
{
GLuint imgtex[4] = {0};
*chroma = (struct gl_transform){{{0}}};
assert(vimg->mpi);
float ls_w = 1.0 / (1 << p->image_desc.chroma_xs);
float ls_h = 1.0 / (1 << p->image_desc.chroma_ys);
if (p->image_params.chroma_location != MP_CHROMA_CENTER) {
int cx, cy;
mp_get_chroma_location(p->image_params.chroma_location, &cx, &cy);
// By default texture coordinates are such that chroma is centered with
// any chroma subsampling. If a specific direction is given, make it
// so that the luma and chroma sample line up exactly.
// For 4:4:4, setting chroma location should have no effect at all.
// luma sample size (in chroma coord. space)
chroma->t[0] = ls_w < 1 ? ls_w * -cx / 2 : 0;
chroma->t[1] = ls_h < 1 ? ls_h * -cy / 2 : 0;
}
// Make sure luma/chroma sizes are aligned.
// Example: For 4:2:0 with size 3x3, the subsampled chroma plane is 2x2
// so luma (3,3) has to align with chroma (2,2).
chroma->m[0][0] = ls_w * (float)vimg->planes[0].tex_w
/ vimg->planes[1].tex_w;
chroma->m[1][1] = ls_h * (float)vimg->planes[0].tex_h
/ vimg->planes[1].tex_h;
if (p->hwdec_active) {
if (p->hwdec->driver->map_image(p->hwdec, vimg->mpi, imgtex) < 0) {
for (int n = 0; n < p->plane_count; n++)
imgtex[n] = -1;
}
} else {
for (int n = 0; n < p->plane_count; n++)
imgtex[n] = vimg->planes[n].gl_texture;
}
for (int n = 0; n < p->plane_count; n++) {
struct texplane *t = &vimg->planes[n];
p->pass_tex[n] = (struct src_tex){
.gl_tex = imgtex[n],
.gl_target = t->gl_target,
.tex_w = t->tex_w,
.tex_h = t->tex_h,
.src = {0, 0, t->w, t->h},
};
}
}
static void init_video(struct gl_video *p)
{
GL *gl = p->gl;
check_gl_features(p);
init_format(p->image_params.imgfmt, p);
p->gl_target = p->opts.use_rectangle ? GL_TEXTURE_RECTANGLE : GL_TEXTURE_2D;
if (p->hwdec_active) {
if (p->hwdec->driver->reinit(p->hwdec, &p->image_params) < 0)
MP_ERR(p, "Initializing texture for hardware decoding failed.\n");
init_format(p->image_params.imgfmt, p);
p->gl_target = p->hwdec->gl_texture_target;
}
mp_image_params_guess_csp(&p->image_params);
p->image_w = p->image_params.w;
p->image_h = p->image_params.h;
int eq_caps = MP_CSP_EQ_CAPS_GAMMA;
if (p->is_yuv && p->image_params.colorspace != MP_CSP_BT_2020_C)
eq_caps |= MP_CSP_EQ_CAPS_COLORMATRIX;
if (p->image_desc.flags & MP_IMGFLAG_XYZ)
eq_caps |= MP_CSP_EQ_CAPS_BRIGHTNESS;
p->video_eq.capabilities = eq_caps;
av_lfg_init(&p->lfg, 1);
debug_check_gl(p, "before video texture creation");
struct video_image *vimg = &p->image;
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
plane->gl_target = p->gl_target;
plane->w = mp_chroma_div_up(p->image_w, p->image_desc.xs[n]);
plane->h = mp_chroma_div_up(p->image_h, p->image_desc.ys[n]);
plane->tex_w = plane->w;
plane->tex_h = plane->h;
if (!p->hwdec_active) {
gl->ActiveTexture(GL_TEXTURE0 + n);
gl->GenTextures(1, &plane->gl_texture);
gl->BindTexture(p->gl_target, plane->gl_texture);
gl->TexImage2D(p->gl_target, 0, plane->gl_internal_format,
plane->tex_w, plane->tex_h, 0,
plane->gl_format, plane->gl_type, NULL);
gl->TexParameteri(p->gl_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri(p->gl_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri(p->gl_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri(p->gl_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
MP_VERBOSE(p, "Texture for plane %d: %dx%d\n",
n, plane->tex_w, plane->tex_h);
}
gl->ActiveTexture(GL_TEXTURE0);
debug_check_gl(p, "after video texture creation");
reinit_rendering(p);
}
static void uninit_video(struct gl_video *p)
{
GL *gl = p->gl;
uninit_rendering(p);
struct video_image *vimg = &p->image;
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
gl->DeleteTextures(1, &plane->gl_texture);
plane->gl_texture = 0;
gl->DeleteBuffers(1, &plane->gl_buffer);
plane->gl_buffer = 0;
plane->buffer_ptr = NULL;
plane->buffer_size = 0;
}
mp_image_unrefp(&vimg->mpi);
// Invalidate image_params to ensure that gl_video_config() will call
// init_video() on uninitialized gl_video.
p->real_image_params = (struct mp_image_params){0};
p->image_params = p->real_image_params;
}
static void pass_prepare_src_tex(struct gl_video *p)
{
GL *gl = p->gl;
struct gl_shader_cache *sc = p->sc;
for (int n = 0; n < TEXUNIT_VIDEO_NUM; n++) {
struct src_tex *s = &p->pass_tex[n];
if (!s->gl_tex)
continue;
char texture_name[32];
char texture_size[32];
snprintf(texture_name, sizeof(texture_name), "texture%d", n);
snprintf(texture_size, sizeof(texture_size), "texture_size%d", n);
gl_sc_uniform_sampler(sc, texture_name, s->gl_target, n);
float f[2] = {1, 1};
if (s->gl_target != GL_TEXTURE_RECTANGLE) {
f[0] = s->tex_w;
f[1] = s->tex_h;
}
gl_sc_uniform_vec2(sc, texture_size, f);
gl->ActiveTexture(GL_TEXTURE0 + n);
gl->BindTexture(s->gl_target, s->gl_tex);
}
gl->ActiveTexture(GL_TEXTURE0);
}
// flags = bits 0-1: rotate, bit 2: flip vertically
static void render_pass_quad(struct gl_video *p, int vp_w, int vp_h,
const struct mp_rect *dst, int flags)
{
struct vertex va[4];
struct gl_transform t;
gl_transform_ortho(&t, 0, vp_w, 0, vp_h);
float x[2] = {dst->x0, dst->x1};
float y[2] = {dst->y0, dst->y1};
gl_transform_vec(t, &x[0], &y[0]);
gl_transform_vec(t, &x[1], &y[1]);
for (int n = 0; n < 4; n++) {
struct vertex *v = &va[n];
v->position.x = x[n / 2];
v->position.y = y[n % 2];
for (int i = 0; i < TEXUNIT_VIDEO_NUM; i++) {
struct src_tex *s = &p->pass_tex[i];
if (s->gl_tex) {
float tx[2] = {s->src.x0, s->src.x1};
float ty[2] = {s->src.y0, s->src.y1};
if (flags & 4)
MPSWAP(float, ty[0], ty[1]);
bool rect = s->gl_target == GL_TEXTURE_RECTANGLE;
v->texcoord[i].x = tx[n / 2] / (rect ? 1 : s->tex_w);
v->texcoord[i].y = ty[n % 2] / (rect ? 1 : s->tex_h);
}
}
}
int rot = flags & 3;
while (rot--) {
static const int perm[4] = {1, 3, 0, 2};
struct vertex vb[4];
memcpy(vb, va, sizeof(vb));
for (int n = 0; n < 4; n++)
memcpy(va[n].texcoord, vb[perm[n]].texcoord,
sizeof(struct vertex_pt[TEXUNIT_VIDEO_NUM]));
}
p->gl->Viewport(0, 0, vp_w, abs(vp_h));
gl_vao_draw_data(&p->vao, GL_TRIANGLE_STRIP, va, 4);
debug_check_gl(p, "after rendering");
}
// flags: see render_pass_quad
static void finish_pass_direct(struct gl_video *p, GLint fbo, int vp_w, int vp_h,
const struct mp_rect *dst, int flags)
{
GL *gl = p->gl;
pass_prepare_src_tex(p);
gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);
gl_sc_gen_shader_and_reset(p->sc);
render_pass_quad(p, vp_w, vp_h, dst, flags);
gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
memset(&p->pass_tex, 0, sizeof(p->pass_tex));
}
// dst_fbo: this will be used for rendering; possibly reallocating the whole
// FBO, if the required parameters have changed
// w, h: required FBO target dimension, and also defines the target rectangle
// used for rasterization
// tex: the texture unit to load the result back into
// flags: 0 or combination of FBOTEX_FUZZY_W/FBOTEX_FUZZY_H (setting the fuzzy
// flags allows the FBO to be larger than the w/h parameters)
static void finish_pass_fbo(struct gl_video *p, struct fbotex *dst_fbo,
int w, int h, int tex, int flags)
{
fbotex_change(dst_fbo, p->gl, p->log, w, h, p->opts.fbo_format, flags);
finish_pass_direct(p, dst_fbo->fbo, dst_fbo->tex_w, dst_fbo->tex_h,
&(struct mp_rect){0, 0, w, h}, 0);
pass_load_fbotex(p, dst_fbo, tex, w, h);
}
static void uninit_scaler(struct gl_video *p, struct scaler *scaler)
{
GL *gl = p->gl;
fbotex_uninit(&scaler->sep_fbo);
gl->DeleteTextures(1, &scaler->gl_lut);
scaler->gl_lut = 0;
scaler->kernel = NULL;
scaler->initialized = false;
}
static void load_shader(struct gl_video *p, const char *body)
{
gl_sc_hadd(p->sc, body);
gl_sc_uniform_f(p->sc, "random", (double)av_lfg_get(&p->lfg) / UINT32_MAX);
gl_sc_uniform_f(p->sc, "frame", p->frames_uploaded);
gl_sc_uniform_vec2(p->sc, "image_size", (GLfloat[]){p->image_w, p->image_h});
}
// Applies an arbitrary number of shaders in sequence, using the given pair
// of FBOs as intermediate buffers. Returns whether any shaders were applied.
static bool apply_shaders(struct gl_video *p, char **shaders,
struct fbotex textures[2], int tex_num,
int tex_w, int tex_h)
{
if (!shaders)
return false;
bool success = false;
int tex = 0;
for (int n = 0; shaders[n]; n++) {
const char *body = gl_sc_loadfile(p->sc, shaders[n]);
if (!body)
continue;
finish_pass_fbo(p, &textures[tex], tex_w, tex_h, tex_num, 0);
load_shader(p, body);
GLSLF("// custom shader\n");
GLSLF("vec4 color = sample(texture%d, texcoord%d, texture_size%d);\n",
tex_num, tex_num, tex_num);
tex = (tex+1) % 2;
success = true;
}
return success;
}
// Semantic equality
static bool double_seq(double a, double b)
{
return (isnan(a) && isnan(b)) || a == b;
}
static bool scaler_fun_eq(struct scaler_fun a, struct scaler_fun b)
{
if ((a.name && !b.name) || (b.name && !a.name))
return false;
return ((!a.name && !b.name) || strcmp(a.name, b.name) == 0) &&
double_seq(a.params[0], b.params[0]) &&
double_seq(a.params[1], b.params[1]) &&
a.blur == b.blur;
}
static bool scaler_conf_eq(struct scaler_config a, struct scaler_config b)
{
// Note: antiring isn't compared because it doesn't affect LUT
// generation
return scaler_fun_eq(a.kernel, b.kernel) &&
scaler_fun_eq(a.window, b.window) &&
a.radius == b.radius;
}
static void reinit_scaler(struct gl_video *p, struct scaler *scaler,
const struct scaler_config *conf,
double scale_factor,
int sizes[])
{
GL *gl = p->gl;
if (scaler_conf_eq(scaler->conf, *conf) &&
scaler->scale_factor == scale_factor &&
scaler->initialized)
return;
uninit_scaler(p, scaler);
scaler->conf = *conf;
scaler->scale_factor = scale_factor;
scaler->insufficient = false;
scaler->initialized = true;
const struct filter_kernel *t_kernel = mp_find_filter_kernel(conf->kernel.name);
if (!t_kernel)
return;
scaler->kernel_storage = *t_kernel;
scaler->kernel = &scaler->kernel_storage;
const char *win = conf->window.name;
if (!win || !win[0])
win = t_kernel->window; // fall back to the scaler's default window
const struct filter_window *t_window = mp_find_filter_window(win);
if (t_window)
scaler->kernel->w = *t_window;
for (int n = 0; n < 2; n++) {
if (!isnan(conf->kernel.params[n]))
scaler->kernel->f.params[n] = conf->kernel.params[n];
if (!isnan(conf->window.params[n]))
scaler->kernel->w.params[n] = conf->window.params[n];
}
if (conf->kernel.blur > 0.0)
scaler->kernel->f.blur = conf->kernel.blur;
if (conf->window.blur > 0.0)
scaler->kernel->w.blur = conf->window.blur;
if (scaler->kernel->f.resizable && conf->radius > 0.0)
scaler->kernel->f.radius = conf->radius;
scaler->insufficient = !mp_init_filter(scaler->kernel, sizes, scale_factor);
if (scaler->kernel->polar) {
scaler->gl_target = GL_TEXTURE_1D;
} else {
scaler->gl_target = GL_TEXTURE_2D;
}
int size = scaler->kernel->size;
int elems_per_pixel = 4;
if (size == 1) {
elems_per_pixel = 1;
} else if (size == 2) {
elems_per_pixel = 2;
} else if (size == 6) {
elems_per_pixel = 3;
}
int width = size / elems_per_pixel;
assert(size == width * elems_per_pixel);
const struct fmt_entry *fmt = &gl_float16_formats[elems_per_pixel - 1];
GLenum target = scaler->gl_target;
gl->ActiveTexture(GL_TEXTURE0 + TEXUNIT_SCALERS + scaler->index);
if (!scaler->gl_lut)
gl->GenTextures(1, &scaler->gl_lut);
gl->BindTexture(target, scaler->gl_lut);
float *weights = talloc_array(NULL, float, LOOKUP_TEXTURE_SIZE * size);
mp_compute_lut(scaler->kernel, LOOKUP_TEXTURE_SIZE, weights);
if (target == GL_TEXTURE_1D) {
gl->TexImage1D(target, 0, fmt->internal_format, LOOKUP_TEXTURE_SIZE,
0, fmt->format, GL_FLOAT, weights);
} else {
gl->TexImage2D(target, 0, fmt->internal_format, width, LOOKUP_TEXTURE_SIZE,
0, fmt->format, GL_FLOAT, weights);
}
talloc_free(weights);
gl->TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
if (target != GL_TEXTURE_1D)
gl->TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
gl->ActiveTexture(GL_TEXTURE0);
debug_check_gl(p, "after initializing scaler");
}
// Set up shared/commonly used variables
static void sampler_prelude(struct gl_video *p, int tex_num)
{
GLSLF("#define tex texture%d\n", tex_num);
GLSLF("vec2 pos = texcoord%d;\n", tex_num);
GLSLF("vec2 size = texture_size%d;\n", tex_num);
GLSLF("vec2 pt = vec2(1.0) / size;\n");
}
static void pass_sample_separated_get_weights(struct gl_video *p,
struct scaler *scaler)
{
gl_sc_uniform_sampler(p->sc, "lut", scaler->gl_target,
TEXUNIT_SCALERS + scaler->index);
int N = scaler->kernel->size;
if (N == 2) {
GLSL(vec2 c1 = texture(lut, vec2(0.5, fcoord)).RG;)
GLSL(float weights[2] = float[](c1.r, c1.g);)
} else if (N == 6) {
GLSL(vec4 c1 = texture(lut, vec2(0.25, fcoord));)
GLSL(vec4 c2 = texture(lut, vec2(0.75, fcoord));)
GLSL(float weights[6] = float[](c1.r, c1.g, c1.b, c2.r, c2.g, c2.b);)
} else {
GLSLF("float weights[%d];\n", N);
for (int n = 0; n < N / 4; n++) {
GLSLF("c = texture(lut, vec2(1.0 / %d + %d / float(%d), fcoord));\n",
N / 2, n, N / 4);
GLSLF("weights[%d] = c.r;\n", n * 4 + 0);
GLSLF("weights[%d] = c.g;\n", n * 4 + 1);
GLSLF("weights[%d] = c.b;\n", n * 4 + 2);
GLSLF("weights[%d] = c.a;\n", n * 4 + 3);
}
}
}
// Handle a single pass (either vertical or horizontal). The direction is given
// by the vector (d_x, d_y). If the vector is 0, then planar interpolation is
// used instead (samples from texture0 through textureN)
static void pass_sample_separated_gen(struct gl_video *p, struct scaler *scaler,
int d_x, int d_y)
{
int N = scaler->kernel->size;
bool use_ar = scaler->conf.antiring > 0;
bool planar = d_x == 0 && d_y == 0;
GLSL(vec4 color = vec4(0.0);)
GLSLF("{\n");
if (!planar) {
GLSLF("vec2 dir = vec2(%d, %d);\n", d_x, d_y);
GLSL(pt *= dir;)
GLSL(float fcoord = dot(fract(pos * size - vec2(0.5)), dir);)
GLSLF("vec2 base = pos - fcoord * pt - pt * vec2(%d);\n", N / 2 - 1);
}
GLSL(vec4 c;)
if (use_ar) {
GLSL(vec4 hi = vec4(0.0);)
GLSL(vec4 lo = vec4(1.0);)
}
pass_sample_separated_get_weights(p, scaler);
GLSLF("// scaler samples\n");
for (int n = 0; n < N; n++) {
if (planar) {
GLSLF("c = texture(texture%d, texcoord%d);\n", n, n);
} else {
GLSLF("c = texture(tex, base + pt * vec2(%d));\n", n);
}
GLSLF("color += vec4(weights[%d]) * c;\n", n);
if (use_ar && (n == N/2-1 || n == N/2)) {
GLSL(lo = min(lo, c);)
GLSL(hi = max(hi, c);)
}
}
if (use_ar)
GLSLF("color = mix(color, clamp(color, lo, hi), %f);\n",
scaler->conf.antiring);
GLSLF("}\n");
}
static void pass_sample_separated(struct gl_video *p, int src_tex,
struct scaler *scaler, int w, int h,
struct gl_transform transform)
{
// Keep the x components untouched for the first pass
struct mp_rect_f src_new = p->pass_tex[src_tex].src;
gl_transform_rect(transform, &src_new);
GLSLF("// pass 1\n");
p->pass_tex[src_tex].src.y0 = src_new.y0;
p->pass_tex[src_tex].src.y1 = src_new.y1;
pass_sample_separated_gen(p, scaler, 0, 1);
int src_w = p->pass_tex[src_tex].src.x1 - p->pass_tex[src_tex].src.x0;
finish_pass_fbo(p, &scaler->sep_fbo, src_w, h, src_tex, FBOTEX_FUZZY_H);
// Restore the sample source for the second pass
sampler_prelude(p, src_tex);
GLSLF("// pass 2\n");
p->pass_tex[src_tex].src.x0 = src_new.x0;
p->pass_tex[src_tex].src.x1 = src_new.x1;
pass_sample_separated_gen(p, scaler, 1, 0);
}
static void pass_sample_polar(struct gl_video *p, struct scaler *scaler)
{
double radius = scaler->kernel->f.radius;
int bound = (int)ceil(radius);
bool use_ar = scaler->conf.antiring > 0;
GLSL(vec4 color = vec4(0.0);)
GLSLF("{\n");
GLSL(vec2 fcoord = fract(pos * size - vec2(0.5));)
GLSL(vec2 base = pos - fcoord * pt;)
GLSL(vec4 c;)
GLSLF("float w, d, wsum = 0.0;\n");
if (use_ar) {
GLSL(vec4 lo = vec4(1.0);)
GLSL(vec4 hi = vec4(0.0);)
}
gl_sc_uniform_sampler(p->sc, "lut", scaler->gl_target,
TEXUNIT_SCALERS + scaler->index);
GLSLF("// scaler samples\n");
for (int y = 1-bound; y <= bound; y++) {
for (int x = 1-bound; x <= bound; x++) {
// Since we can't know the subpixel position in advance, assume a
// worst case scenario
int yy = y > 0 ? y-1 : y;
int xx = x > 0 ? x-1 : x;
double dmax = sqrt(xx*xx + yy*yy);
// Skip samples definitely outside the radius
if (dmax >= radius)
continue;
GLSLF("d = length(vec2(%d, %d) - fcoord)/%f;\n", x, y, radius);
// Check for samples that might be skippable
if (dmax >= radius - 1)
GLSLF("if (d < 1.0) {\n");
GLSL(w = texture1D(lut, d).r;)
GLSL(wsum += w;)
GLSLF("c = texture(tex, base + pt * vec2(%d, %d));\n", x, y);
GLSL(color += vec4(w) * c;)
if (use_ar && x >= 0 && y >= 0 && x <= 1 && y <= 1) {
GLSL(lo = min(lo, c);)
GLSL(hi = max(hi, c);)
}
if (dmax >= radius -1)
GLSLF("}\n");
}
}
GLSL(color = color / vec4(wsum);)
if (use_ar)
GLSLF("color = mix(color, clamp(color, lo, hi), %f);\n",
scaler->conf.antiring);
GLSLF("}\n");
}
static void bicubic_calcweights(struct gl_video *p, const char *t, const char *s)
{
// Explanation of how bicubic scaling with only 4 texel fetches is done:
// http://www.mate.tue.nl/mate/pdfs/10318.pdf
// 'Efficient GPU-Based Texture Interpolation using Uniform B-Splines'
// Explanation why this algorithm normally always blurs, even with unit
// scaling:
// http://bigwww.epfl.ch/preprints/ruijters1001p.pdf
// 'GPU Prefilter for Accurate Cubic B-spline Interpolation'
GLSLF("vec4 %s = vec4(-0.5, 0.1666, 0.3333, -0.3333) * %s"
" + vec4(1, 0, -0.5, 0.5);\n", t, s);
GLSLF("%s = %s * %s + vec4(0, 0, -0.5, 0.5);\n", t, t, s);
GLSLF("%s = %s * %s + vec4(-0.6666, 0, 0.8333, 0.1666);\n", t, t, s);
GLSLF("%s.xy *= vec2(1, 1) / vec2(%s.z, %s.w);\n", t, t, t);
GLSLF("%s.xy += vec2(1 + %s, 1 - %s);\n", t, s, s);
}
static void pass_sample_bicubic_fast(struct gl_video *p)
{
GLSL(vec4 color;)
GLSLF("{\n");
GLSL(vec2 fcoord = fract(pos * size + vec2(0.5, 0.5));)
bicubic_calcweights(p, "parmx", "fcoord.x");
bicubic_calcweights(p, "parmy", "fcoord.y");
GLSL(vec4 cdelta;)
GLSL(cdelta.xz = parmx.RG * vec2(-pt.x, pt.x);)
GLSL(cdelta.yw = parmy.RG * vec2(-pt.y, pt.y);)
// first y-interpolation
GLSL(vec4 ar = texture(tex, pos + cdelta.xy);)
GLSL(vec4 ag = texture(tex, pos + cdelta.xw);)
GLSL(vec4 ab = mix(ag, ar, parmy.b);)
// second y-interpolation
GLSL(vec4 br = texture(tex, pos + cdelta.zy);)
GLSL(vec4 bg = texture(tex, pos + cdelta.zw);)
GLSL(vec4 aa = mix(bg, br, parmy.b);)
// x-interpolation
GLSL(color = mix(aa, ab, parmx.b);)
GLSLF("}\n");
}
static void pass_sample_sharpen3(struct gl_video *p, struct scaler *scaler)
{
GLSL(vec4 color;)
GLSLF("{\n");
GLSL(vec2 st = pt * 0.5;)
GLSL(vec4 p = texture(tex, pos);)
GLSL(vec4 sum = texture(tex, pos + st * vec2(+1, +1))
+ texture(tex, pos + st * vec2(+1, -1))
+ texture(tex, pos + st * vec2(-1, +1))
+ texture(tex, pos + st * vec2(-1, -1));)
float param = scaler->conf.kernel.params[0];
param = isnan(param) ? 0.5 : param;
GLSLF("color = p + (p - 0.25 * sum) * %f;\n", param);
GLSLF("}\n");
}
static void pass_sample_sharpen5(struct gl_video *p, struct scaler *scaler)
{
GLSL(vec4 color;)
GLSLF("{\n");
GLSL(vec2 st1 = pt * 1.2;)
GLSL(vec4 p = texture(tex, pos);)
GLSL(vec4 sum1 = texture(tex, pos + st1 * vec2(+1, +1))
+ texture(tex, pos + st1 * vec2(+1, -1))
+ texture(tex, pos + st1 * vec2(-1, +1))
+ texture(tex, pos + st1 * vec2(-1, -1));)
GLSL(vec2 st2 = pt * 1.5;)
GLSL(vec4 sum2 = texture(tex, pos + st2 * vec2(+1, 0))
+ texture(tex, pos + st2 * vec2( 0, +1))
+ texture(tex, pos + st2 * vec2(-1, 0))
+ texture(tex, pos + st2 * vec2( 0, -1));)
GLSL(vec4 t = p * 0.859375 + sum2 * -0.1171875 + sum1 * -0.09765625;)
float param = scaler->conf.kernel.params[0];
param = isnan(param) ? 0.5 : param;
GLSLF("color = p + t * %f;\n", param);
GLSLF("}\n");
}
static void pass_sample_oversample(struct gl_video *p, struct scaler *scaler,
int w, int h)
{
GLSL(vec4 color;)
GLSLF("{\n");
GLSL(vec2 pos = pos + vec2(0.5) * pt;) // round to nearest
GLSL(vec2 fcoord = fract(pos * size - vec2(0.5));)
// We only need to sample from the four corner pixels since we're using
// nearest neighbour and can compute the exact transition point
GLSL(vec2 baseNW = pos - fcoord * pt;)
GLSL(vec2 baseNE = baseNW + vec2(pt.x, 0.0);)
GLSL(vec2 baseSW = baseNW + vec2(0.0, pt.y);)
GLSL(vec2 baseSE = baseNW + pt;)
// Determine the mixing coefficient vector
gl_sc_uniform_vec2(p->sc, "output_size", (float[2]){w, h});
GLSL(vec2 coeff = vec2((baseSE - pos) * output_size);)
GLSL(coeff = clamp(coeff, 0.0, 1.0);)
float threshold = scaler->conf.kernel.params[0];
if (threshold > 0) { // also rules out NAN
GLSLF("coeff = mix(coeff, vec2(0.0), "
"lessThanEqual(coeff, vec2(%f)));\n", threshold);
GLSLF("coeff = mix(coeff, vec2(1.0), "
"greaterThanEqual(coeff, vec2(%f)));\n", threshold);
}
// Compute the right blend of colors
GLSL(vec4 left = mix(texture(tex, baseSW),
texture(tex, baseNW),
coeff.y);)
GLSL(vec4 right = mix(texture(tex, baseSE),
texture(tex, baseNE),
coeff.y);)
GLSL(color = mix(right, left, coeff.x);)
GLSLF("}\n");
}
// Sample. This samples from the texture ID given by src_tex. It's hardcoded to
// use all variables and values associated with it (which includes textureN,
// texcoordN and texture_sizeN).
// The src rectangle is implicit in p->pass_tex + transform.
// The dst rectangle is implicit by what the caller will do next, but w and h
// must still be what is going to be used (to dimension FBOs correctly).
// This will declare "vec4 color;", which contains the scaled contents.
// The scaler unit is initialized by this function; in order to avoid cache
// thrashing, the scaler unit should usually use the same parameters.
static void pass_sample(struct gl_video *p, int src_tex, struct scaler *scaler,
const struct scaler_config *conf, double scale_factor,
int w, int h, struct gl_transform transform)
{
reinit_scaler(p, scaler, conf, scale_factor, filter_sizes);
sampler_prelude(p, src_tex);
// Set up the transformation for everything other than separated scaling
if (!scaler->kernel || scaler->kernel->polar)
gl_transform_rect(transform, &p->pass_tex[src_tex].src);
// Dispatch the scaler. They're all wildly different.
const char *name = scaler->conf.kernel.name;
if (strcmp(name, "bilinear") == 0) {
GLSL(vec4 color = texture(tex, pos);)
} else if (strcmp(name, "bicubic_fast") == 0) {
pass_sample_bicubic_fast(p);
} else if (strcmp(name, "sharpen3") == 0) {
pass_sample_sharpen3(p, scaler);
} else if (strcmp(name, "sharpen5") == 0) {
pass_sample_sharpen5(p, scaler);
} else if (strcmp(name, "oversample") == 0) {
pass_sample_oversample(p, scaler, w, h);
} else if (strcmp(name, "custom") == 0) {
const char *body = gl_sc_loadfile(p->sc, p->opts.scale_shader);
if (body) {
load_shader(p, body);
GLSLF("// custom scale-shader\n");
GLSL(vec4 color = sample(tex, pos, size);)
} else {
p->opts.scale_shader = NULL;
}
} else if (scaler->kernel && scaler->kernel->polar) {
pass_sample_polar(p, scaler);
} else if (scaler->kernel) {
pass_sample_separated(p, src_tex, scaler, w, h, transform);
} else {
// Should never happen
abort();
}
// Micro-optimization: Avoid scaling unneeded channels
if (!p->has_alpha || p->opts.alpha_mode != 1)
GLSL(color.a = 1.0;)
}
static void pass_copy_from_rect(struct gl_video *p)
{
struct src_tex new_pass_tex[TEXUNIT_VIDEO_NUM];
assert(sizeof(new_pass_tex) == sizeof(p->pass_tex));
memcpy(&new_pass_tex, &p->pass_tex, sizeof(p->pass_tex));
memset(&p->pass_tex, 0, sizeof(p->pass_tex));
for (int n = 0; n < TEXUNIT_VIDEO_NUM; n++) {
struct src_tex *src = &new_pass_tex[n];
if (src->gl_tex && src->gl_target == GL_TEXTURE_RECTANGLE) {
p->pass_tex[0] = (struct src_tex){
.gl_tex = src->gl_tex,
.gl_target = GL_TEXTURE_RECTANGLE,
.tex_w = src->tex_w,
.tex_h = src->tex_h,
.src = {0, 0, src->tex_w, src->tex_h},
};
const char *get = p->gl->version < 300 ? "texture2DRect" : "texture";
GLSLF("vec4 color = %s(texture0, texcoord0);\n", get);
finish_pass_fbo(p, &p->copy_fbos[n], src->tex_w, src->tex_h, 0, 0);
src->gl_tex = p->copy_fbos[n].texture;
src->gl_target = GL_TEXTURE_2D;
}
}
memcpy(&p->pass_tex, &new_pass_tex, sizeof(p->pass_tex));
}
// sample from video textures, set "color" variable to yuv value
static void pass_read_video(struct gl_video *p)
{
struct gl_transform chromafix;
pass_set_image_textures(p, &p->image, &chromafix);
if (p->gl->version < 300 && p->pass_tex[0].gl_target == GL_TEXTURE_RECTANGLE)
pass_copy_from_rect(p);
// The custom shader logic is a bit tricky, but there are basically three
// different places it can occur: RGB, or chroma *and* luma (which are
// treated separately even for 4:4:4 content, but the minor speed loss
// is not worth the complexity it would require).
const char *shader = gl_sc_loadfile(p->sc, p->opts.source_shader);
// Since this is before normalization, we have to take into account
// the bit depth. Specifically, we want the shader to perform normalization
// to 16 bit because otherwise it results in bad quantization, especially
// with 8-bit FBOs (where it just destroys the image completely)
int in_bits = p->image_desc.component_bits,
tx_bits = (in_bits + 7) & ~7;
float cmul = ((1 << tx_bits) - 1.0) / ((1 << in_bits) - 1.0);
// Custom source shaders are required to output at range [0.0, 1.0]
p->use_normalized_range = shader != NULL;
if (p->image_desc.flags & MP_IMGFLAG_XYZ) {
cmul = 1.0;
p->use_normalized_range = true;
}
// Special case for non-planar content
if (p->plane_count == 1) {
if (shader) {
load_shader(p, shader);
GLSLF("// custom source-shader (RGB)\n");
gl_sc_uniform_f(p->sc, "cmul", cmul);
GLSL(vec4 color = sample(texture0, texcoord0, texture_size0);)
p->use_indirect = true;
} else {
GLSL(vec4 color = texture(texture0, texcoord0);)
}
return;
}
// Chroma preprocessing (merging -> shaders -> scaling)
struct src_tex luma = p->pass_tex[0];
int c_w = p->pass_tex[1].src.x1 - p->pass_tex[1].src.x0;
int c_h = p->pass_tex[1].src.y1 - p->pass_tex[1].src.y0;
const struct scaler_config *cscale = &p->opts.scaler[2];
// Non-trivial sampling is needed on the chroma plane
bool nontrivial = p->image_desc.flags & MP_IMGFLAG_SUBSAMPLED &&
strcmp(cscale->kernel.name, "bilinear") != 0;
bool merged = false;
if (p->plane_count > 2 && (nontrivial || shader)) {
// For simplicity and performance, we merge the chroma planes
// into a single texture before scaling or shading, so the shader
// doesn't need to run multiple times.
GLSLF("// chroma merging\n");
GLSL(vec4 color = vec4(texture(texture1, texcoord1).r,
texture(texture2, texcoord2).r,
0.0, 1.0);)
// We also pull up here in this case to avoid the issues described
// above.
GLSLF("color.rg *= %f;\n", cmul);
p->use_normalized_range = true;
merged = true;
assert(c_w == p->pass_tex[2].src.x1 - p->pass_tex[2].src.x0);
assert(c_h == p->pass_tex[2].src.y1 - p->pass_tex[2].src.y0);
finish_pass_fbo(p, &p->chroma_merge_fbo, c_w, c_h, 1, 0);
}
if (shader) {
// Chroma plane shader logic
load_shader(p, shader);
gl_sc_uniform_f(p->sc, "cmul", merged ? 1.0 : cmul);
GLSLF("// custom source-shader (chroma)\n");
GLSL(vec4 color = sample(texture1, texcoord1, texture_size1);)
GLSL(color.ba = vec2(0.0, 1.0);) // skip unused
finish_pass_fbo(p, &p->source_fbo, c_w, c_h, 1, 0);
p->use_indirect = true;
}
if (p->image_desc.flags & MP_IMGFLAG_SUBSAMPLED && nontrivial) {
GLSLF("// chroma scaling\n");
pass_sample(p, 1, &p->scaler[2], cscale, 1.0, p->image_w, p->image_h,
chromafix);
GLSL(vec2 chroma = color.rg;)
p->use_indirect = true;
} else {
// No explicit scaling needed, either because it's trivial (ie.
// bilinear), or because there's no subsampling. We have to manually
// apply the fix to the chroma coordinates because it's not implied by
// pass_sample.
GLSL(vec4 color;)
gl_transform_rect(chromafix, &p->pass_tex[1].src);
if (p->plane_count > 2 && !merged) {
gl_transform_rect(chromafix, &p->pass_tex[2].src);
GLSL(vec2 chroma = vec2(texture(texture1, texcoord1).r,
texture(texture2, texcoord2).r);)
} else {
GLSL(vec2 chroma = texture(texture1, texcoord1).rg;)
}
}
p->pass_tex[0] = luma; // Restore the luma plane
if (shader) {
load_shader(p, shader);
gl_sc_uniform_f(p->sc, "cmul", cmul);
GLSLF("// custom source-shader (luma)\n");
GLSL(float luma = sample(texture0, texcoord0, texture_size0).r;)
p->use_indirect = true;
} else {
GLSL(float luma = texture(texture0, texcoord0).r;)
if (p->use_normalized_range)
GLSLF("luma *= %f;\n", cmul);
}
GLSL(color = vec4(luma, chroma, 1.0);)
if (p->has_alpha && p->plane_count >= 4) {
GLSL(color.a = texture(texture3, texcoord3).r;)
if (p->use_normalized_range)
GLSLF("color.a *= %f;\n", cmul);
}
}
// yuv conversion, and any other conversions before main up/down-scaling
static void pass_convert_yuv(struct gl_video *p)
{
struct gl_shader_cache *sc = p->sc;
struct mp_csp_params cparams = MP_CSP_PARAMS_DEFAULTS;
cparams.gray = p->is_yuv && !p->is_packed_yuv && p->plane_count == 1;
cparams.input_bits = p->image_desc.component_bits;
cparams.texture_bits = (cparams.input_bits + 7) & ~7;
mp_csp_set_image_params(&cparams, &p->image_params);
mp_csp_copy_equalizer_values(&cparams, &p->video_eq);
p->user_gamma = 1.0 / (cparams.gamma * p->opts.gamma);
GLSLF("// color conversion\n");
if (p->color_swizzle[0])
GLSLF("color = color.%s;\n", p->color_swizzle);
// Pre-colormatrix input gamma correction
if (p->image_desc.flags & MP_IMGFLAG_XYZ) {
cparams.colorspace = MP_CSP_XYZ;
// Pre-colormatrix input gamma correction. Note that this results in
// linear light
GLSL(color.rgb = pow(color.rgb, vec3(2.6));)
}
// Something already took care of expansion
if (p->use_normalized_range)
cparams.input_bits = cparams.texture_bits;
// Conversion from Y'CbCr or other linear spaces to RGB
if (!p->is_rgb) {
struct mp_cmat m = {{{0}}};
if (p->image_desc.flags & MP_IMGFLAG_XYZ) {
struct mp_csp_primaries csp = mp_get_csp_primaries(p->image_params.primaries);
mp_get_xyz2rgb_coeffs(&cparams, csp, MP_INTENT_RELATIVE_COLORIMETRIC, &m);
} else {
mp_get_yuv2rgb_coeffs(&cparams, &m);
}
gl_sc_uniform_mat3(sc, "colormatrix", true, &m.m[0][0]);
gl_sc_uniform_vec3(sc, "colormatrix_c", m.c);
GLSL(color.rgb = mat3(colormatrix) * color.rgb + colormatrix_c;)
}
if (p->image_params.colorspace == MP_CSP_BT_2020_C) {
p->use_indirect = true;
// Conversion for C'rcY'cC'bc via the BT.2020 CL system:
// C'bc = (B'-Y'c) / 1.9404 | C'bc <= 0
// = (B'-Y'c) / 1.5816 | C'bc > 0
//
// C'rc = (R'-Y'c) / 1.7184 | C'rc <= 0
// = (R'-Y'c) / 0.9936 | C'rc > 0
//
// as per the BT.2020 specification, table 4. This is a non-linear
// transformation because (constant) luminance receives non-equal
// contributions from the three different channels.
GLSLF("// constant luminance conversion\n");
GLSL(color.br = color.br * mix(vec2(1.5816, 0.9936),
vec2(1.9404, 1.7184),
lessThanEqual(color.br, vec2(0)))
+ color.gg;)
// Expand channels to camera-linear light. This shader currently just
// assumes everything uses the BT.2020 12-bit gamma function, since the
// difference between 10 and 12-bit is negligible for anything other
// than 12-bit content.
GLSL(color.rgb = mix(color.rgb / vec3(4.5),
pow((color.rgb + vec3(0.0993))/vec3(1.0993), vec3(1.0/0.45)),
lessThanEqual(vec3(0.08145), color.rgb));)
// Calculate the green channel from the expanded RYcB
// The BT.2020 specification says Yc = 0.2627*R + 0.6780*G + 0.0593*B
GLSL(color.g = (color.g - 0.2627*color.r - 0.0593*color.b)/0.6780;)
// Recompress to receive the R'G'B' result, same as other systems
GLSL(color.rgb = mix(color.rgb * vec3(4.5),
vec3(1.0993) * pow(color.rgb, vec3(0.45)) - vec3(0.0993),
lessThanEqual(vec3(0.0181), color.rgb));)
}
if (!p->has_alpha || p->opts.alpha_mode == 0) { // none
GLSL(color.a = 1.0;)
} else if (p->opts.alpha_mode == 2) { // blend
GLSL(color = vec4(color.rgb * color.a, 1.0);)
}
}
static void get_scale_factors(struct gl_video *p, double xy[2])
{
xy[0] = (p->dst_rect.x1 - p->dst_rect.x0) /
(double)(p->src_rect.x1 - p->src_rect.x0);
xy[1] = (p->dst_rect.y1 - p->dst_rect.y0) /
(double)(p->src_rect.y1 - p->src_rect.y0);
}
// Linearize (expand), given a TRC as input
static void pass_linearize(struct gl_video *p, enum mp_csp_trc trc)
{
if (trc == MP_CSP_TRC_LINEAR)
return;
GLSL(color.rgb = clamp(color.rgb, 0.0, 1.0);)
switch (trc) {
case MP_CSP_TRC_SRGB:
GLSL(color.rgb = mix(color.rgb / vec3(12.92),
pow((color.rgb + vec3(0.055))/vec3(1.055),
vec3(2.4)),
lessThan(vec3(0.04045), color.rgb));)
break;
case MP_CSP_TRC_BT_1886:
GLSL(color.rgb = pow(color.rgb, vec3(1.961));)
break;
case MP_CSP_TRC_GAMMA18:
GLSL(color.rgb = pow(color.rgb, vec3(1.8));)
break;
case MP_CSP_TRC_GAMMA22:
GLSL(color.rgb = pow(color.rgb, vec3(2.2));)
break;
case MP_CSP_TRC_GAMMA28:
GLSL(color.rgb = pow(color.rgb, vec3(2.8));)
break;
case MP_CSP_TRC_PRO_PHOTO:
GLSL(color.rgb = mix(color.rgb / vec3(16.0),
pow(color.rgb, vec3(1.8)),
lessThan(vec3(0.03125), color.rgb));)
break;
}
}
// Delinearize (compress), given a TRC as output
static void pass_delinearize(struct gl_video *p, enum mp_csp_trc trc)
{
if (trc == MP_CSP_TRC_LINEAR)
return;
GLSL(color.rgb = clamp(color.rgb, 0.0, 1.0);)
switch (trc) {
case MP_CSP_TRC_SRGB:
GLSL(color.rgb = mix(color.rgb * vec3(12.92),
vec3(1.055) * pow(color.rgb, vec3(1.0/2.4))
- vec3(0.055),
lessThanEqual(vec3(0.0031308), color.rgb));)
break;
case MP_CSP_TRC_BT_1886:
GLSL(color.rgb = pow(color.rgb, vec3(1.0/1.961));)
break;
case MP_CSP_TRC_GAMMA18:
GLSL(color.rgb = pow(color.rgb, vec3(1.0/1.8));)
break;
case MP_CSP_TRC_GAMMA22:
GLSL(color.rgb = pow(color.rgb, vec3(1.0/2.2));)
break;
case MP_CSP_TRC_GAMMA28:
GLSL(color.rgb = pow(color.rgb, vec3(1.0/2.8));)
break;
case MP_CSP_TRC_PRO_PHOTO:
GLSL(color.rgb = mix(color.rgb * vec3(16.0),
pow(color.rgb, vec3(1.0/1.8)),
lessThanEqual(vec3(0.001953), color.rgb));)
break;
}
}
// Takes care of the main scaling and pre/post-conversions
static void pass_scale_main(struct gl_video *p)
{
// Figure out the main scaler.
double xy[2];
get_scale_factors(p, xy);
bool downscaling = xy[0] < 1.0 || xy[1] < 1.0;
bool upscaling = !downscaling && (xy[0] > 1.0 || xy[1] > 1.0);
double scale_factor = 1.0;
struct scaler *scaler = &p->scaler[0];
struct scaler_config scaler_conf = p->opts.scaler[0];
if (p->opts.scaler_resizes_only && !downscaling && !upscaling)
scaler_conf.kernel.name = "bilinear";
if (downscaling && p->opts.scaler[1].kernel.name) {
scaler_conf = p->opts.scaler[1];
scaler = &p->scaler[1];
}
double f = MPMIN(xy[0], xy[1]);
if (p->opts.fancy_downscaling && f < 1.0 &&
fabs(xy[0] - f) < 0.01 && fabs(xy[1] - f) < 0.01)
{
scale_factor = FFMAX(1.0, 1.0 / f);
}
// Pre-conversion, like linear light/sigmoidization
GLSLF("// scaler pre-conversion\n");
if (p->use_linear) {
p->use_indirect = true;
pass_linearize(p, p->image_params.gamma);
}
bool use_sigmoid = p->use_linear && p->opts.sigmoid_upscaling && upscaling;
float sig_center, sig_slope, sig_offset, sig_scale;
if (use_sigmoid) {
p->use_indirect = true;
// Coefficients for the sigmoidal transform are taken from the
// formula here: http://www.imagemagick.org/Usage/color_mods/#sigmoidal
sig_center = p->opts.sigmoid_center;
sig_slope = p->opts.sigmoid_slope;
// This function needs to go through (0,0) and (1,1) so we compute the
// values at 1 and 0, and then scale/shift them, respectively.
sig_offset = 1.0/(1+expf(sig_slope * sig_center));
sig_scale = 1.0/(1+expf(sig_slope * (sig_center-1))) - sig_offset;
GLSLF("color.rgb = %f - log(1.0/(color.rgb * %f + %f) - 1.0)/%f;\n",
sig_center, sig_scale, sig_offset, sig_slope);
}
// Compute the cropped and rotated transformation
float sx = (p->src_rect.x1 - p->src_rect.x0) / (float)p->image_w,
sy = (p->src_rect.y1 - p->src_rect.y0) / (float)p->image_h,
ox = p->src_rect.x0,
oy = p->src_rect.y0;
struct gl_transform transform = {{{sx,0.0}, {0.0,sy}}, {ox,oy}};
int xc = 0, yc = 1,
vp_w = p->dst_rect.x1 - p->dst_rect.x0,
vp_h = p->dst_rect.y1 - p->dst_rect.y0;
if ((p->image_params.rotate % 180) == 90) {
MPSWAP(float, transform.m[0][xc], transform.m[0][yc]);
MPSWAP(float, transform.m[1][xc], transform.m[1][yc]);
MPSWAP(float, transform.t[0], transform.t[1]);
MPSWAP(int, xc, yc);
MPSWAP(int, vp_w, vp_h);
}
GLSLF("// main scaling\n");
if (!p->use_indirect && strcmp(scaler_conf.kernel.name, "bilinear") == 0) {
// implicitly scale in pass_video_to_screen, but set up the textures
// manually (for cropping etc.). Special care has to be taken for the
// chroma planes (everything except luma=tex0), to make sure the offset
// is scaled to the correct reference frame (in the case of subsampled
// input)
struct gl_transform tchroma = transform;
tchroma.t[xc] /= 1 << p->image_desc.chroma_xs;
tchroma.t[yc] /= 1 << p->image_desc.chroma_ys;
for (int n = 0; n < p->plane_count; n++)
gl_transform_rect(n > 0 ? tchroma : transform, &p->pass_tex[n].src);
} else {
finish_pass_fbo(p, &p->indirect_fbo, p->image_w, p->image_h, 0, 0);
pass_sample(p, 0, scaler, &scaler_conf, scale_factor, vp_w, vp_h,
transform);
}
GLSLF("// scaler post-conversion\n");
if (use_sigmoid) {
// Inverse of the transformation above
GLSLF("color.rgb = (1.0/(1.0 + exp(%f * (%f - color.rgb))) - %f) / %f;\n",
sig_slope, sig_center, sig_offset, sig_scale);
}
}
// Adapts the colors from the given color space to the display device's native
// gamut.
static void pass_colormanage(struct gl_video *p, enum mp_csp_prim prim_src,
enum mp_csp_trc trc_src)
{
GLSLF("// color management\n");
enum mp_csp_trc trc_dst = p->opts.target_trc;
enum mp_csp_prim prim_dst = p->opts.target_prim;
if (p->use_lut_3d) {
// The 3DLUT is hard-coded against BT.2020's gamut during creation, and
// we never want to adjust its output (so treat it as linear)
prim_dst = MP_CSP_PRIM_BT_2020;
trc_dst = MP_CSP_TRC_LINEAR;
}
if (prim_dst == MP_CSP_PRIM_AUTO)
prim_dst = prim_src;
if (trc_dst == MP_CSP_TRC_AUTO) {
trc_dst = trc_src;
// Avoid outputting linear light at all costs
if (trc_dst == MP_CSP_TRC_LINEAR)
trc_dst = p->image_params.gamma;
if (trc_dst == MP_CSP_TRC_LINEAR)
trc_dst = MP_CSP_TRC_GAMMA22;
}
bool need_cms = prim_src != prim_dst || p->use_lut_3d;
bool need_gamma = trc_src != trc_dst || need_cms;
if (need_gamma)
pass_linearize(p, trc_src);
// Adapt to the right colorspace if necessary
if (prim_src != prim_dst) {
struct mp_csp_primaries csp_src = mp_get_csp_primaries(prim_src),
csp_dst = mp_get_csp_primaries(prim_dst);
float m[3][3] = {{0}};
mp_get_cms_matrix(csp_src, csp_dst, MP_INTENT_RELATIVE_COLORIMETRIC, m);
gl_sc_uniform_mat3(p->sc, "cms_matrix", true, &m[0][0]);
GLSL(color.rgb = cms_matrix * color.rgb;)
}
if (p->use_lut_3d) {
gl_sc_uniform_sampler(p->sc, "lut_3d", GL_TEXTURE_3D, TEXUNIT_3DLUT);
// For the 3DLUT we are arbitrarily using 2.4 as input gamma to reduce
// the severity of quantization errors.
GLSL(color.rgb = clamp(color.rgb, 0.0, 1.0);)
GLSL(color.rgb = pow(color.rgb, vec3(1.0/2.4));)
GLSL(color.rgb = texture3D(lut_3d, color.rgb).rgb;)
}
if (need_gamma)
pass_delinearize(p, trc_dst);
}
static void pass_dither(struct gl_video *p)
{
GL *gl = p->gl;
// Assume 8 bits per component if unknown.
int dst_depth = p->depth_g ? p->depth_g : 8;
if (p->opts.dither_depth > 0)
dst_depth = p->opts.dither_depth;
if (p->opts.dither_depth < 0 || p->opts.dither_algo < 0)
return;
if (!p->dither_texture) {
MP_VERBOSE(p, "Dither to %d.\n", dst_depth);
int tex_size;
void *tex_data;
GLint tex_iformat;
GLint tex_format;
GLenum tex_type;
unsigned char temp[256];
if (p->opts.dither_algo == 0) {
int sizeb = p->opts.dither_size;
int size = 1 << sizeb;
if (p->last_dither_matrix_size != size) {
p->last_dither_matrix = talloc_realloc(p, p->last_dither_matrix,
float, size * size);
mp_make_fruit_dither_matrix(p->last_dither_matrix, sizeb);
p->last_dither_matrix_size = size;
}
tex_size = size;
tex_iformat = gl_float16_formats[0].internal_format;
tex_format = gl_float16_formats[0].format;
tex_type = GL_FLOAT;
tex_data = p->last_dither_matrix;
} else {
assert(sizeof(temp) >= 8 * 8);
mp_make_ordered_dither_matrix(temp, 8);
const struct fmt_entry *fmt = find_tex_format(gl, 1, 1);
tex_size = 8;
tex_iformat = fmt->internal_format;
tex_format = fmt->format;
tex_type = fmt->type;
tex_data = temp;
}
p->dither_size = tex_size;
gl->ActiveTexture(GL_TEXTURE0 + TEXUNIT_DITHER);
gl->GenTextures(1, &p->dither_texture);
gl->BindTexture(GL_TEXTURE_2D, p->dither_texture);
gl->PixelStorei(GL_UNPACK_ALIGNMENT, 1);
gl->TexImage2D(GL_TEXTURE_2D, 0, tex_iformat, tex_size, tex_size, 0,
tex_format, tex_type, tex_data);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
gl->PixelStorei(GL_UNPACK_ALIGNMENT, 4);
gl->ActiveTexture(GL_TEXTURE0);
debug_check_gl(p, "dither setup");
}
GLSLF("// dithering\n");
// This defines how many bits are considered significant for output on
// screen. The superfluous bits will be used for rounding according to the
// dither matrix. The precision of the source implicitly decides how many
// dither patterns can be visible.
int dither_quantization = (1 << dst_depth) - 1;
gl_sc_uniform_sampler(p->sc, "dither", GL_TEXTURE_2D, TEXUNIT_DITHER);
GLSLF("vec2 dither_pos = gl_FragCoord.xy / %d;\n", p->dither_size);
if (p->opts.temporal_dither) {
int phase = p->frames_rendered % 8u;
float r = phase * (M_PI / 2); // rotate
float m = phase < 4 ? 1 : -1; // mirror
float matrix[2][2] = {{cos(r), -sin(r) },
{sin(r) * m, cos(r) * m}};
gl_sc_uniform_mat2(p->sc, "dither_trafo", true, &matrix[0][0]);
GLSL(dither_pos = dither_trafo * dither_pos;)
}
GLSL(float dither_value = texture(dither, dither_pos).r;)
GLSLF("color = floor(color * %d + dither_value + 0.5 / (%d * %d)) / %d;\n",
dither_quantization, p->dither_size, p->dither_size,
dither_quantization);
}
// Draws the OSD, in scene-referred colors.. If cms is true, subtitles are
// instead adapted to the display's gamut.
static void pass_draw_osd(struct gl_video *p, int draw_flags, double pts,
struct mp_osd_res rect, int vp_w, int vp_h, int fbo,
bool cms)
{
mpgl_osd_generate(p->osd, rect, pts, p->image_params.stereo_out, draw_flags);
p->gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);
for (int n = 0; n < MAX_OSD_PARTS; n++) {
enum sub_bitmap_format fmt = mpgl_osd_get_part_format(p->osd, n);
if (!fmt)
continue;
gl_sc_uniform_sampler(p->sc, "osdtex", GL_TEXTURE_2D, 0);
switch (fmt) {
case SUBBITMAP_RGBA: {
GLSLF("// OSD (RGBA)\n");
GLSL(vec4 color = texture(osdtex, texcoord).bgra;)
break;
}
case SUBBITMAP_LIBASS: {
GLSLF("// OSD (libass)\n");
GLSL(vec4 color =
vec4(ass_color.rgb, ass_color.a * texture(osdtex, texcoord).r);)
break;
}
default:
abort();
}
// Subtitle color management, they're assumed to be sRGB by default
if (cms)
pass_colormanage(p, MP_CSP_PRIM_BT_709, MP_CSP_TRC_SRGB);
gl_sc_set_vao(p->sc, mpgl_osd_get_vao(p->osd));
gl_sc_gen_shader_and_reset(p->sc);
mpgl_osd_draw_part(p->osd, vp_w, vp_h, n);
}
gl_sc_set_vao(p->sc, &p->vao);
}
// The main rendering function, takes care of everything up to and including
// upscaling
static void pass_render_frame(struct gl_video *p)
{
p->use_linear = p->opts.linear_scaling || p->opts.sigmoid_upscaling;
p->use_indirect = false; // set to true as needed by pass_*
pass_read_video(p);
pass_convert_yuv(p);
// For subtitles
double vpts = p->image.mpi->pts;
if (vpts == MP_NOPTS_VALUE)
vpts = p->osd_pts;
if (p->osd && p->opts.blend_subs == 2) {
double scale[2];
get_scale_factors(p, scale);
struct mp_osd_res rect = {
.w = p->image_w, .h = p->image_h,
.display_par = scale[1] / scale[0], // counter compensate scaling
};
finish_pass_fbo(p, &p->blend_subs_fbo, p->image_w, p->image_h, 0, 0);
pass_draw_osd(p, OSD_DRAW_SUB_ONLY, vpts, rect, p->image_w, p->image_h,
p->blend_subs_fbo.fbo, false);
GLSL(vec4 color = texture(texture0, texcoord0);)
}
if (apply_shaders(p, p->opts.pre_shaders, &p->pre_fbo[0], 0,
p->image_w, p->image_h))
{
p->use_indirect = true;
}
pass_scale_main(p);
int vp_w = p->dst_rect.x1 - p->dst_rect.x0,
vp_h = p->dst_rect.y1 - p->dst_rect.y0;
if (p->osd && p->opts.blend_subs == 1) {
// Recreate the real video size from the src/dst rects
struct mp_osd_res rect = {
.w = vp_w, .h = vp_h,
.ml = -p->src_rect.x0, .mr = p->src_rect.x1 - p->image_w,
.mt = -p->src_rect.y0, .mb = p->src_rect.y1 - p->image_h,
.display_par = 1.0,
};
// Adjust margins for scale
double scale[2];
get_scale_factors(p, scale);
rect.ml *= scale[0]; rect.mr *= scale[0];
rect.mt *= scale[1]; rect.mb *= scale[1];
// We should always blend subtitles in non-linear light
if (p->use_linear)
pass_delinearize(p, p->image_params.gamma);
finish_pass_fbo(p, &p->blend_subs_fbo, vp_w, vp_h, 0, FBOTEX_FUZZY);
pass_draw_osd(p, OSD_DRAW_SUB_ONLY, vpts, rect, vp_w, vp_h,
p->blend_subs_fbo.fbo, false);
GLSL(vec4 color = texture(texture0, texcoord0);)
if (p->use_linear)
pass_linearize(p, p->image_params.gamma);
}
apply_shaders(p, p->opts.post_shaders, &p->post_fbo[0], 0, vp_w, vp_h);
}
static void pass_draw_to_screen(struct gl_video *p, int fbo)
{
// Adjust the overall gamma before drawing to screen
if (p->user_gamma != 1) {
gl_sc_uniform_f(p->sc, "user_gamma", p->user_gamma);
GLSL(color.rgb = clamp(color.rgb, 0.0, 1.0);)
GLSL(color.rgb = pow(color.rgb, vec3(user_gamma));)
}
pass_colormanage(p, p->image_params.primaries,
p->use_linear ? MP_CSP_TRC_LINEAR : p->image_params.gamma);
pass_dither(p);
int flags = (p->image_params.rotate % 90 ? 0 : p->image_params.rotate / 90)
| (p->image.image_flipped ? 4 : 0);
finish_pass_direct(p, fbo, p->vp_w, p->vp_h, &p->dst_rect, flags);
}
// Draws an interpolate frame to fbo, based on the frame timing in t
static void gl_video_interpolate_frame(struct gl_video *p, int fbo,
struct frame_timing *t)
{
int vp_w = p->dst_rect.x1 - p->dst_rect.x0,
vp_h = p->dst_rect.y1 - p->dst_rect.y0;
// First of all, figure out if we have a frame availble at all, and draw
// it manually + reset the queue if not
if (!p->surfaces[p->surface_now].pts) {
pass_render_frame(p);
finish_pass_fbo(p, &p->surfaces[p->surface_now].fbotex,
vp_w, vp_h, 0, FBOTEX_FUZZY);
p->surfaces[p->surface_now].pts = t ? t->pts : 0;
p->surfaces[p->surface_now].vpts = p->image.mpi->pts;
p->surface_idx = p->surface_now;
}
// Figure out the queue size. For illustration, a filter radius of 2 would
// look like this: _ A [B] C D _
// A is surface_bse, B is surface_now, C is surface_nxt and D is
// surface_end.
struct scaler *tscale = &p->scaler[3];
reinit_scaler(p, tscale, &p->opts.scaler[3], 1, tscale_sizes);
bool oversample = strcmp(tscale->conf.kernel.name, "oversample") == 0;
int size;
if (oversample) {
size = 2;
} else {
assert(tscale->kernel && !tscale->kernel->polar);
size = ceil(tscale->kernel->size);
assert(size <= TEXUNIT_VIDEO_NUM);
}
int radius = size/2;
int surface_now = p->surface_now;
int surface_nxt = fbosurface_wrap(surface_now + 1);
int surface_bse = fbosurface_wrap(surface_now - (radius-1));
int surface_end = fbosurface_wrap(surface_now + radius);
assert(fbosurface_wrap(surface_bse + size-1) == surface_end);
// Render a new frame if it came in and there's room in the queue
int surface_dst = fbosurface_wrap(p->surface_idx+1);
if (t && surface_dst != surface_bse &&
p->surfaces[p->surface_idx].pts < t->pts) {
MP_STATS(p, "new-pts");
pass_render_frame(p);
finish_pass_fbo(p, &p->surfaces[surface_dst].fbotex,
vp_w, vp_h, 0, FBOTEX_FUZZY);
p->surfaces[surface_dst].pts = t->pts;
p->surfaces[surface_dst].vpts = p->image.mpi->pts;
p->surface_idx = surface_dst;
}
// Figure out whether the queue is "valid". A queue is invalid if the
// frames' PTS is not monotonically increasing. Anything else is invalid,
// so avoid blending incorrect data and just draw the latest frame as-is.
// Possible causes for failure of this condition include seeks, pausing,
// end of playback or start of playback.
bool valid = true;
for (int i = surface_bse, ii; valid && i != surface_end; i = ii) {
ii = fbosurface_wrap(i+1);
if (!p->surfaces[i].pts || !p->surfaces[ii].pts) {
valid = false;
} else if (p->surfaces[ii].pts < p->surfaces[i].pts) {
valid = false;
MP_DBG(p, "interpolation queue underrun\n");
}
}
// Update OSD PTS to synchronize subtitles with the displayed frame
if (t) {
double vpts_now = p->surfaces[surface_now].vpts,
vpts_nxt = p->surfaces[surface_nxt].vpts,
vpts_new = p->image.mpi->pts;
if (vpts_now != MP_NOPTS_VALUE &&
vpts_nxt != MP_NOPTS_VALUE &&
vpts_new != MP_NOPTS_VALUE)
{
// Round to nearest neighbour
double vpts_vsync = (t->next_vsync - t->pts)/1e6 + vpts_new;
p->osd_pts = fabs(vpts_vsync-vpts_now) < fabs(vpts_vsync-vpts_nxt)
? vpts_now : vpts_nxt;
}
}
// Finally, draw the right mix of frames to the screen.
if (!t || !valid) {
// surface_now is guaranteed to be valid, so we can safely use it.
pass_load_fbotex(p, &p->surfaces[surface_now].fbotex, 0, vp_w, vp_h);
GLSL(vec4 color = texture(texture0, texcoord0);)
p->is_interpolated = false;
} else {
int64_t pts_now = p->surfaces[surface_now].pts,
pts_nxt = p->surfaces[surface_nxt].pts;
double fscale = pts_nxt - pts_now, mix;
if (oversample) {
double vsync_interval = t->next_vsync - t->prev_vsync,
threshold = tscale->conf.kernel.params[0];
threshold = isnan(threshold) ? 0.0 : threshold;
mix = (pts_nxt - t->next_vsync) / vsync_interval;
mix = mix <= 0 + threshold ? 0 : mix;
mix = mix >= 1 - threshold ? 1 : mix;
mix = 1 - mix;
gl_sc_uniform_f(p->sc, "inter_coeff", mix);
GLSL(vec4 color = mix(texture(texture0, texcoord0),
texture(texture1, texcoord1),
inter_coeff);)
} else {
mix = (t->next_vsync - pts_now) / fscale;
gl_sc_uniform_f(p->sc, "fcoord", mix);
pass_sample_separated_gen(p, tscale, 0, 0);
}
for (int i = 0; i < size; i++) {
pass_load_fbotex(p, &p->surfaces[fbosurface_wrap(surface_bse+i)].fbotex,
i, vp_w, vp_h);
}
MP_STATS(p, "frame-mix");
MP_DBG(p, "inter frame ppts: %lld, pts: %lld, vsync: %lld, mix: %f\n",
(long long)pts_now, (long long)pts_nxt,
(long long)t->next_vsync, mix);
p->is_interpolated = true;
}
pass_draw_to_screen(p, fbo);
// Dequeue frames if necessary
if (t) {
int64_t vsync_interval = t->next_vsync - t->prev_vsync;
int64_t vsync_guess = t->next_vsync + vsync_interval;
if (p->surfaces[surface_nxt].pts > p->surfaces[p->surface_now].pts &&
p->surfaces[surface_nxt].pts < vsync_guess)
{
p->surface_now = surface_nxt;
}
}
}
// (fbo==0 makes BindFramebuffer select the screen backbuffer)
void gl_video_render_frame(struct gl_video *p, int fbo, struct frame_timing *t)
{
GL *gl = p->gl;
struct video_image *vimg = &p->image;
gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);
if (!vimg->mpi || p->dst_rect.x0 > 0 || p->dst_rect.y0 > 0 ||
p->dst_rect.x1 < p->vp_w || p->dst_rect.y1 < abs(p->vp_h))
{
struct m_color c = p->opts.background;
gl->ClearColor(c.r / 255.0, c.g / 255.0, c.b / 255.0, c.a / 255.0);
gl->Clear(GL_COLOR_BUFFER_BIT);
}
if (vimg->mpi) {
gl_video_upload_image(p);
gl_sc_set_vao(p->sc, &p->vao);
if (p->opts.interpolation) {
gl_video_interpolate_frame(p, fbo, t);
} else {
// Skip interpolation if there's nothing to be done
pass_render_frame(p);
pass_draw_to_screen(p, fbo);
}
debug_check_gl(p, "after video rendering");
}
gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);
if (p->osd) {
pass_draw_osd(p, p->opts.blend_subs ? OSD_DRAW_OSD_ONLY : 0,
p->osd_pts, p->osd_rect, p->vp_w, p->vp_h, fbo, true);
debug_check_gl(p, "after OSD rendering");
}
gl->UseProgram(0);
gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
p->frames_rendered++;
}
// vp_w/vp_h is the implicit size of the target framebuffer.
// vp_h can be negative to flip the screen.
void gl_video_resize(struct gl_video *p, int vp_w, int vp_h,
struct mp_rect *src, struct mp_rect *dst,
struct mp_osd_res *osd)
{
p->src_rect = *src;
p->dst_rect = *dst;
p->osd_rect = *osd;
p->vp_w = vp_w;
p->vp_h = vp_h;
gl_video_reset_surfaces(p);
}
static bool get_image(struct gl_video *p, struct mp_image *mpi)
{
GL *gl = p->gl;
if (!p->opts.pbo)
return false;
struct video_image *vimg = &p->image;
// See comments in init_video() about odd video sizes.
// The normal upload path does this too, but less explicit.
mp_image_set_size(mpi, vimg->planes[0].w, vimg->planes[0].h);
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
mpi->stride[n] = mp_image_plane_w(mpi, n) * p->image_desc.bytes[n];
int needed_size = mp_image_plane_h(mpi, n) * mpi->stride[n];
if (!plane->gl_buffer)
gl->GenBuffers(1, &plane->gl_buffer);
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, plane->gl_buffer);
if (needed_size > plane->buffer_size) {
plane->buffer_size = needed_size;
gl->BufferData(GL_PIXEL_UNPACK_BUFFER, plane->buffer_size,
NULL, GL_DYNAMIC_DRAW);
}
if (!plane->buffer_ptr)
plane->buffer_ptr = gl->MapBuffer(GL_PIXEL_UNPACK_BUFFER,
GL_WRITE_ONLY);
mpi->planes[n] = plane->buffer_ptr;
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
return true;
}
void gl_video_set_image(struct gl_video *p, struct mp_image *mpi)
{
assert(mpi);
struct video_image *vimg = &p->image;
talloc_free(vimg->mpi);
vimg->mpi = mpi;
vimg->needs_upload = true;
p->osd_pts = mpi->pts;
}
static void gl_video_upload_image(struct gl_video *p)
{
GL *gl = p->gl;
struct video_image *vimg = &p->image;
struct mp_image *mpi = vimg->mpi;
if (p->hwdec_active || !mpi || !vimg->needs_upload)
return;
vimg->needs_upload = false;
p->frames_uploaded++;
assert(mpi->num_planes == p->plane_count);
mp_image_t mpi2 = *mpi;
bool pbo = false;
if (!vimg->planes[0].buffer_ptr && get_image(p, &mpi2)) {
for (int n = 0; n < p->plane_count; n++) {
int line_bytes = mp_image_plane_w(mpi, n) * p->image_desc.bytes[n];
int plane_h = mp_image_plane_h(mpi, n);
memcpy_pic(mpi2.planes[n], mpi->planes[n], line_bytes, plane_h,
mpi2.stride[n], mpi->stride[n]);
}
pbo = true;
}
vimg->image_flipped = mpi2.stride[0] < 0;
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
void *plane_ptr = mpi2.planes[n];
if (pbo) {
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, plane->gl_buffer);
if (!gl->UnmapBuffer(GL_PIXEL_UNPACK_BUFFER))
MP_FATAL(p, "Video PBO upload failed. "
"Remove the 'pbo' suboption.\n");
plane->buffer_ptr = NULL;
plane_ptr = NULL; // PBO offset 0
}
gl->ActiveTexture(GL_TEXTURE0 + n);
gl->BindTexture(p->gl_target, plane->gl_texture);
glUploadTex(gl, p->gl_target, plane->gl_format, plane->gl_type,
plane_ptr, mpi2.stride[n], 0, 0, plane->w, plane->h, 0);
}
gl->ActiveTexture(GL_TEXTURE0);
if (pbo)
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
static bool test_fbo(struct gl_video *p, bool *success)
{
if (!*success)
return false;
GL *gl = p->gl;
*success = false;
MP_VERBOSE(p, "Testing user-set FBO format (0x%x)\n",
(unsigned)p->opts.fbo_format);
struct fbotex fbo = {0};
if (fbotex_init(&fbo, p->gl, p->log, 16, 16, p->opts.fbo_format)) {
gl->BindFramebuffer(GL_FRAMEBUFFER, fbo.fbo);
gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
*success = true;
}
fbotex_uninit(&fbo);
glCheckError(gl, p->log, "FBO test");
return *success;
}
// Disable features that are not supported with the current OpenGL version.
static void check_gl_features(struct gl_video *p)
{
GL *gl = p->gl;
bool have_float_tex = gl->mpgl_caps & MPGL_CAP_FLOAT_TEX;
bool have_fbo = gl->mpgl_caps & MPGL_CAP_FB;
bool have_1d_tex = gl->mpgl_caps & MPGL_CAP_1D_TEX;
bool have_3d_tex = gl->mpgl_caps & MPGL_CAP_3D_TEX;
bool have_mix = gl->glsl_version >= 130;
// Normally, we want to disable them by default if FBOs are unavailable,
// because they will be slow (not critically slow, but still slower).
// Without FP textures, we must always disable them.
// I don't know if luminance alpha float textures exist, so disregard them.
for (int n = 0; n < 4; n++) {
const struct filter_kernel *kernel =
mp_find_filter_kernel(p->opts.scaler[n].kernel.name);
if (kernel) {
char *reason = NULL;
if (!test_fbo(p, &have_fbo))
reason = "scaler (FBOs missing)";
if (!have_float_tex)
reason = "scaler (float tex. missing)";
if (!have_1d_tex && kernel->polar)
reason = "scaler (1D tex. missing)";
if (reason) {
p->opts.scaler[n].kernel.name = "bilinear";
MP_WARN(p, "Disabling %s.\n", reason);
}
}
}
// GLES3 doesn't provide filtered 16 bit integer textures
// GLES2 doesn't even provide 3D textures
if (p->use_lut_3d && !(have_3d_tex && have_float_tex)) {
p->use_lut_3d = false;
MP_WARN(p, "Disabling color management (GLES unsupported).\n");
}
// Missing float textures etc. (maybe ordered would actually work)
if (p->opts.dither_algo >= 0 && gl->es) {
p->opts.dither_algo = -1;
MP_WARN(p, "Disabling dithering (GLES unsupported).\n");
}
int use_cms = p->opts.target_prim != MP_CSP_PRIM_AUTO ||
p->opts.target_trc != MP_CSP_TRC_AUTO || p->use_lut_3d;
// mix() is needed for some gamma functions
if (!have_mix && (p->opts.linear_scaling || p->opts.sigmoid_upscaling)) {
p->opts.linear_scaling = false;
p->opts.sigmoid_upscaling = false;
MP_WARN(p, "Disabling linear/sigmoid scaling (GLSL version too old).\n");
}
if (!have_mix && use_cms) {
p->opts.target_prim = MP_CSP_PRIM_AUTO;
p->opts.target_trc = MP_CSP_TRC_AUTO;
p->use_lut_3d = false;
MP_WARN(p, "Disabling color management (GLSL version too old).\n");
}
if (use_cms && !test_fbo(p, &have_fbo)) {
p->opts.target_prim = MP_CSP_PRIM_AUTO;
p->opts.target_trc = MP_CSP_TRC_AUTO;
p->use_lut_3d = false;
MP_WARN(p, "Disabling color management (FBOs missing).\n");
}
if (p->opts.interpolation && !test_fbo(p, &have_fbo)) {
p->opts.interpolation = false;
MP_WARN(p, "Disabling interpolation (FBOs missing).\n");
}
if (p->opts.blend_subs && !test_fbo(p, &have_fbo)) {
p->opts.blend_subs = 0;
MP_WARN(p, "Disabling subtitle blending (FBOs missing).\n");
}
if (gl->es && p->opts.pbo) {
p->opts.pbo = 0;
MP_WARN(p, "Disabling PBOs (GLES unsupported).\n");
}
}
static int init_gl(struct gl_video *p)
{
GL *gl = p->gl;
debug_check_gl(p, "before init_gl");
check_gl_features(p);
gl->Disable(GL_DITHER);
gl_vao_init(&p->vao, gl, sizeof(struct vertex), vertex_vao);
gl_video_set_gl_state(p);
// Test whether we can use 10 bit. Hope that testing a single format/channel
// is good enough (instead of testing all 1-4 channels variants etc.).
const struct fmt_entry *fmt = find_tex_format(gl, 2, 1);
if (gl->GetTexLevelParameteriv && fmt->format) {
GLuint tex;
gl->GenTextures(1, &tex);
gl->BindTexture(GL_TEXTURE_2D, tex);
gl->TexImage2D(GL_TEXTURE_2D, 0, fmt->internal_format, 64, 64, 0,
fmt->format, fmt->type, NULL);
GLenum pname = 0;
switch (fmt->format) {
case GL_RED: pname = GL_TEXTURE_RED_SIZE; break;
case GL_LUMINANCE: pname = GL_TEXTURE_LUMINANCE_SIZE; break;
}
GLint param = 0;
if (pname)
gl->GetTexLevelParameteriv(GL_TEXTURE_2D, 0, pname, &param);
if (param) {
MP_VERBOSE(p, "16 bit texture depth: %d.\n", (int)param);
p->texture_16bit_depth = param;
}
gl->DeleteTextures(1, &tex);
}
debug_check_gl(p, "after init_gl");
return 1;
}
void gl_video_uninit(struct gl_video *p)
{
if (!p)
return;
GL *gl = p->gl;
uninit_video(p);
gl_sc_destroy(p->sc);
gl_vao_uninit(&p->vao);
gl->DeleteTextures(1, &p->lut_3d_texture);
mpgl_osd_destroy(p->osd);
gl_set_debug_logger(gl, NULL);
talloc_free(p);
}
void gl_video_set_gl_state(struct gl_video *p)
{
GL *gl = p->gl;
gl->ActiveTexture(GL_TEXTURE0);
if (gl->mpgl_caps & MPGL_CAP_ROW_LENGTH)
gl->PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
gl->PixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
void gl_video_unset_gl_state(struct gl_video *p)
{
/* nop */
}
void gl_video_reset(struct gl_video *p)
{
gl_video_reset_surfaces(p);
}
bool gl_video_showing_interpolated_frame(struct gl_video *p)
{
return p->is_interpolated;
}
// dest = src.<w> (always using 4 components)
static void packed_fmt_swizzle(char w[5], const struct fmt_entry *texfmt,
const struct packed_fmt_entry *fmt)
{
const char *comp = "rgba";
// Normally, we work with GL_RG
if (texfmt && texfmt->internal_format == GL_LUMINANCE_ALPHA)
comp = "ragb";
for (int c = 0; c < 4; c++)
w[c] = comp[MPMAX(fmt->components[c] - 1, 0)];
w[4] = '\0';
}
static bool init_format(int fmt, struct gl_video *init)
{
struct GL *gl = init->gl;
init->hwdec_active = false;
if (init->hwdec && init->hwdec->driver->imgfmt == fmt) {
fmt = init->hwdec->converted_imgfmt;
init->hwdec_active = true;
}
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
if (!desc.id)
return false;
if (desc.num_planes > 4)
return false;
const struct fmt_entry *plane_format[4] = {0};
init->color_swizzle[0] = '\0';
init->has_alpha = false;
// YUV/planar formats
if (desc.flags & MP_IMGFLAG_YUV_P) {
int bits = desc.component_bits;
if ((desc.flags & MP_IMGFLAG_NE) && bits >= 8 && bits <= 16) {
init->has_alpha = desc.num_planes > 3;
plane_format[0] = find_tex_format(gl, (bits + 7) / 8, 1);
for (int p = 1; p < desc.num_planes; p++)
plane_format[p] = plane_format[0];
goto supported;
}
}
// YUV/half-packed
if (fmt == IMGFMT_NV12 || fmt == IMGFMT_NV21) {
if (!(init->gl->mpgl_caps & MPGL_CAP_TEX_RG))
return false;
plane_format[0] = find_tex_format(gl, 1, 1);
plane_format[1] = find_tex_format(gl, 1, 2);
if (fmt == IMGFMT_NV21)
snprintf(init->color_swizzle, sizeof(init->color_swizzle), "rbga");
goto supported;
}
// RGB/planar
if (fmt == IMGFMT_GBRP) {
snprintf(init->color_swizzle, sizeof(init->color_swizzle), "brga");
plane_format[0] = find_tex_format(gl, 1, 1);
for (int p = 1; p < desc.num_planes; p++)
plane_format[p] = plane_format[0];
goto supported;
}
// XYZ (same organization as RGB packed, but requires conversion matrix)
if (fmt == IMGFMT_XYZ12) {
plane_format[0] = find_tex_format(gl, 2, 3);
goto supported;
}
// Packed RGB special formats
for (const struct fmt_entry *e = mp_to_gl_formats; e->mp_format; e++) {
if (!gl->es && e->mp_format == fmt) {
plane_format[0] = e;
goto supported;
}
}
// Packed RGB(A) formats
for (const struct packed_fmt_entry *e = mp_packed_formats; e->fmt; e++) {
if (e->fmt == fmt) {
int n_comp = desc.bytes[0] / e->component_size;
plane_format[0] = find_tex_format(gl, e->component_size, n_comp);
packed_fmt_swizzle(init->color_swizzle, plane_format[0], e);
init->has_alpha = e->components[3] != 0;
goto supported;
}
}
// Packed YUV Apple formats
if (init->gl->mpgl_caps & MPGL_CAP_APPLE_RGB_422) {
for (const struct fmt_entry *e = gl_apple_formats; e->mp_format; e++) {
if (e->mp_format == fmt) {
init->is_packed_yuv = true;
snprintf(init->color_swizzle, sizeof(init->color_swizzle),
"gbra");
plane_format[0] = e;
goto supported;
}
}
}
// Unsupported format
return false;
supported:
// Stuff like IMGFMT_420AP10. Untested, most likely insane.
if (desc.num_planes == 4 && (desc.component_bits % 8) != 0)
return false;
if (desc.component_bits > 8 && desc.component_bits < 16) {
if (init->texture_16bit_depth < 16)
return false;
}
for (int p = 0; p < desc.num_planes; p++) {
if (!plane_format[p]->format)
return false;
}
for (int p = 0; p < desc.num_planes; p++) {
struct texplane *plane = &init->image.planes[p];
const struct fmt_entry *format = plane_format[p];
assert(format);
plane->gl_format = format->format;
plane->gl_internal_format = format->internal_format;
plane->gl_type = format->type;
}
init->is_yuv = desc.flags & MP_IMGFLAG_YUV;
init->is_rgb = desc.flags & MP_IMGFLAG_RGB;
init->plane_count = desc.num_planes;
init->image_desc = desc;
return true;
}
bool gl_video_check_format(struct gl_video *p, int mp_format)
{
struct gl_video tmp = *p;
return init_format(mp_format, &tmp);
}
void gl_video_config(struct gl_video *p, struct mp_image_params *params)
{
mp_image_unrefp(&p->image.mpi);
if (!mp_image_params_equal(&p->real_image_params, params)) {
uninit_video(p);
p->real_image_params = *params;
p->image_params = *params;
if (params->imgfmt)
init_video(p);
}
gl_video_reset_surfaces(p);
}
void gl_video_set_output_depth(struct gl_video *p, int r, int g, int b)
{
MP_VERBOSE(p, "Display depth: R=%d, G=%d, B=%d\n", r, g, b);
p->depth_g = g;
}
void gl_video_set_osd_source(struct gl_video *p, struct osd_state *osd)
{
mpgl_osd_destroy(p->osd);
p->osd = NULL;
p->osd_state = osd;
recreate_osd(p);
}
struct gl_video *gl_video_init(GL *gl, struct mp_log *log, struct mpv_global *g)
{
if (gl->version < 210 && gl->es < 200) {
mp_err(log, "At least OpenGL 2.1 or OpenGL ES 2.0 required.\n");
return NULL;
}
struct gl_video *p = talloc_ptrtype(NULL, p);
*p = (struct gl_video) {
.gl = gl,
.global = g,
.log = log,
.opts = gl_video_opts_def,
.gl_target = GL_TEXTURE_2D,
.texture_16bit_depth = 16,
.scaler = {{.index = 0}, {.index = 1}, {.index = 2}, {.index = 3}},
.sc = gl_sc_create(gl, log, g),
};
gl_video_set_debug(p, true);
init_gl(p);
recreate_osd(p);
return p;
}
// Get static string for scaler shader. If "tscale" is set to true, the
// scaler must be a separable convolution filter.
static const char *handle_scaler_opt(const char *name, bool tscale)
{
if (name && name[0]) {
const struct filter_kernel *kernel = mp_find_filter_kernel(name);
if (kernel && (!tscale || !kernel->polar))
return kernel->f.name;
for (const char *const *filter = tscale ? fixed_tscale_filters
: fixed_scale_filters;
*filter; filter++) {
if (strcmp(*filter, name) == 0)
return *filter;
}
}
return NULL;
}
static char **dup_str_array(void *parent, char **src)
{
if (!src)
return NULL;
char **res = talloc_new(parent);
int num = 0;
for (int n = 0; src && src[n]; n++)
MP_TARRAY_APPEND(res, res, num, talloc_strdup(res, src[n]));
MP_TARRAY_APPEND(res, res, num, NULL);
return res;
}
// Set the options, and possibly update the filter chain too.
// Note: assumes all options are valid and verified by the option parser.
void gl_video_set_options(struct gl_video *p, struct gl_video_opts *opts,
int *queue_size)
{
talloc_free(p->opts.source_shader);
talloc_free(p->opts.scale_shader);
talloc_free(p->opts.pre_shaders);
talloc_free(p->opts.post_shaders);
p->opts = *opts;
for (int n = 0; n < 4; n++) {
p->opts.scaler[n].kernel.name =
(char *)handle_scaler_opt(p->opts.scaler[n].kernel.name, n==3);
}
// Figure out an adequate size for the interpolation queue. The larger
// the radius, the earlier we need to queue frames. This rough heuristic
// seems to work for now, but ideally we want to rework the pause/unpause
// logic to make larger queue sizes the default.
if (queue_size && p->opts.interpolation) {
const struct filter_kernel *kernel =
mp_find_filter_kernel(p->opts.scaler[3].kernel.name);
if (kernel) {
double radius = kernel->f.radius;
radius = radius > 0 ? radius : p->opts.scaler[3].radius;
*queue_size = 50e3 * ceil(radius);
}
}
p->opts.source_shader = talloc_strdup(p, p->opts.source_shader);
p->opts.scale_shader = talloc_strdup(p, p->opts.scale_shader);
p->opts.pre_shaders = dup_str_array(p, p->opts.pre_shaders);
p->opts.post_shaders = dup_str_array(p, p->opts.post_shaders);
check_gl_features(p);
uninit_rendering(p);
}
struct mp_csp_equalizer *gl_video_eq_ptr(struct gl_video *p)
{
return &p->video_eq;
}
// Call when the mp_csp_equalizer returned by gl_video_eq_ptr() was changed.
void gl_video_eq_update(struct gl_video *p)
{
gl_video_reset_surfaces(p);
}
static int validate_scaler_opt(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param)
{
char s[20] = {0};
int r = 1;
bool tscale = bstr_equals0(name, "tscale");
if (bstr_equals0(param, "help")) {
r = M_OPT_EXIT - 1;
} else {
snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
if (!handle_scaler_opt(s, tscale))
r = M_OPT_INVALID;
}
if (r < 1) {
mp_info(log, "Available scalers:\n");
for (const char *const *filter = tscale ? fixed_tscale_filters
: fixed_scale_filters;
*filter; filter++) {
mp_info(log, " %s\n", *filter);
}
for (int n = 0; mp_filter_kernels[n].f.name; n++) {
if (!tscale || !mp_filter_kernels[n].polar)
mp_info(log, " %s\n", mp_filter_kernels[n].f.name);
}
if (s[0])
mp_fatal(log, "No scaler named '%s' found!\n", s);
}
return r;
}
static int validate_window_opt(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param)
{
char s[20] = {0};
int r = 1;
if (bstr_equals0(param, "help")) {
r = M_OPT_EXIT - 1;
} else {
snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
const struct filter_window *window = mp_find_filter_window(s);
if (!window)
r = M_OPT_INVALID;
}
if (r < 1) {
mp_info(log, "Available windows:\n");
for (int n = 0; mp_filter_windows[n].name; n++)
mp_info(log, " %s\n", mp_filter_windows[n].name);
if (s[0])
mp_fatal(log, "No window named '%s' found!\n", s);
}
return r;
}
float gl_video_scale_ambient_lux(float lmin, float lmax,
float rmin, float rmax, float lux)
{
assert(lmax > lmin);
float num = (rmax - rmin) * (log10(lux) - log10(lmin));
float den = log10(lmax) - log10(lmin);
float result = num / den + rmin;
// clamp the result
float max = MPMAX(rmax, rmin);
float min = MPMIN(rmax, rmin);
return MPMAX(MPMIN(result, max), min);
}
void gl_video_set_ambient_lux(struct gl_video *p, int lux)
{
if (p->opts.gamma_auto) {
float gamma = gl_video_scale_ambient_lux(16.0, 64.0, 2.40, 1.961, lux);
MP_VERBOSE(p, "ambient light changed: %dlux (gamma: %f)\n", lux, gamma);
p->opts.gamma = MPMIN(1.0, 1.961 / gamma);
gl_video_eq_update(p);
}
}
void gl_video_set_hwdec(struct gl_video *p, struct gl_hwdec *hwdec)
{
p->hwdec = hwdec;
mp_image_unrefp(&p->image.mpi);
}
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