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mpv/video/out/opengl/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 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.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <math.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <libavutil/common.h>
#include <libavutil/lfg.h>
#include "video.h"
#include "misc/bstr.h"
#include "options/m_config.h"
#include "common/global.h"
#include "options/options.h"
#include "common.h"
#include "utils.h"
#include "hwdec.h"
#include "osd.h"
#include "stream/stream.h"
#include "superxbr.h"
#include "nnedi3.h"
#include "video_shaders.h"
#include "video/out/filter_kernels.h"
#include "video/out/aspect.h"
#include "video/out/bitmap_packer.h"
#include "video/out/dither.h"
#include "video/out/vo.h"
// Maximal number of passes that prescaler can be applied.
#define MAX_PRESCALE_PASSES 5
// Maximal number of steps each pass of prescaling contains
#define MAX_PRESCALE_STEPS 2
// 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",
"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;
GLint gl_internal_format;
GLenum gl_target;
bool use_integer;
GLenum gl_format;
GLenum gl_type;
GLuint gl_texture;
int gl_buffer;
};
struct video_image {
struct texplane planes[4];
bool image_flipped;
struct mp_image *mpi; // original input image
};
enum plane_type {
PLANE_NONE = 0,
PLANE_RGB,
PLANE_LUMA,
PLANE_CHROMA,
PLANE_ALPHA,
PLANE_XYZ,
};
// A self-contained description of a source image which can be bound to a
// texture unit and sampled from. Contains metadata about how it's to be used
struct img_tex {
enum plane_type type; // must be set to something non-zero
int components; // number of relevant coordinates
float multiplier; // multiplier to be used when sampling
GLuint gl_tex;
GLenum gl_target;
bool use_integer;
int tex_w, tex_h;
int w, h;
struct gl_transform transform;
};
struct fbosurface {
struct fbotex fbotex;
double pts;
};
#define FBOSURFACES_MAX 10
struct cached_file {
char *path;
char *body;
};
struct gl_video {
GL *gl;
struct mpv_global *global;
struct mp_log *log;
struct gl_video_opts opts;
bool gl_debug;
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;
GLuint nnedi3_weights_buffer;
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;
bool is_yuv, is_packed_yuv;
bool has_alpha;
char color_swizzle[5];
bool use_integer_conversion;
struct video_image image;
bool dumb_mode;
bool forced_dumb_mode;
struct fbotex merge_fbo[4];
struct fbotex deband_fbo[4];
struct fbotex scale_fbo[4];
struct fbotex integer_fbo[4];
struct fbotex indirect_fbo;
struct fbotex blend_subs_fbo;
struct fbotex unsharp_fbo;
struct fbotex output_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];
struct fbotex prescale_fbo[MAX_PRESCALE_PASSES][MAX_PRESCALE_STEPS];
int surface_idx;
int surface_now;
int frames_drawn;
bool is_interpolated;
bool output_fbo_valid;
// state for configured scalers
struct scaler scaler[SCALER_COUNT];
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 img_tex pass_tex[TEXUNIT_VIDEO_NUM];
int pass_tex_num;
int texture_w, texture_h;
struct gl_transform texture_offset; // texture transform without rotation
bool use_linear;
float user_gamma;
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 cached_file files[10];
int num_files;
struct gl_hwdec *hwdec;
bool hwdec_active;
bool dsi_warned;
bool custom_shader_fn_warned;
};
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_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_ui_byte_formats_gles3[] = {
{0, GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE}, // 1 x 8
{0, GL_RG8UI, GL_RG_INTEGER, GL_UNSIGNED_BYTE}, // 2 x 8
{0, GL_RGB8UI, GL_RGB_INTEGER, GL_UNSIGNED_BYTE}, // 3 x 8
{0, GL_RGBA8UI, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE}, // 4 x 8
{0, GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT}, // 1 x 16
{0, GL_RG16UI, GL_RG_INTEGER, GL_UNSIGNED_SHORT}, // 2 x 16
{0, GL_RGB16UI, GL_RGB_INTEGER, GL_UNSIGNED_SHORT}, // 3 x 16
{0, GL_RGBA16UI, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT}, // 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,
.temporal_dither_period = 1,
.fbo_format = 0,
.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
{{"mitchell", .params={NAN, NAN}}, {.params = {NAN, NAN}},
.clamp = 1, }, // tscale
},
.scaler_resizes_only = 1,
.scaler_lut_size = 6,
.interpolation_threshold = 0.0001,
.alpha_mode = 3,
.background = {0, 0, 0, 255},
.gamma = 1.0f,
.prescale_passes = 1,
.prescale_downscaling_threshold = 2.0f,
};
const struct gl_video_opts gl_video_opts_hq_def = {
.dither_depth = 0,
.dither_size = 6,
.temporal_dither_period = 1,
.fbo_format = 0,
.correct_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
{{"mitchell", .params={NAN, NAN}}, {.params = {NAN, NAN}},
.clamp = 1, }, // tscale
},
.scaler_resizes_only = 1,
.scaler_lut_size = 6,
.interpolation_threshold = 0.0001,
.alpha_mode = 3,
.background = {0, 0, 0, 255},
.gamma = 1.0f,
.blend_subs = 0,
.deband = 1,
.prescale_passes = 1,
.prescale_downscaling_threshold = 2.0f,
};
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
#define SCALER_OPTS(n, i) \
OPT_STRING_VALIDATE(n, scaler[i].kernel.name, 0, validate_scaler_opt), \
OPT_FLOAT(n"-param1", scaler[i].kernel.params[0], 0), \
OPT_FLOAT(n"-param2", scaler[i].kernel.params[1], 0), \
OPT_FLOAT(n"-blur", scaler[i].kernel.blur, 0), \
OPT_FLOAT(n"-wparam", scaler[i].window.params[0], 0), \
OPT_FLAG(n"-clamp", scaler[i].clamp, 0), \
OPT_FLOATRANGE(n"-radius", scaler[i].radius, 0, 0.5, 16.0), \
OPT_FLOATRANGE(n"-antiring", scaler[i].antiring, 0, 0.0, 1.0), \
OPT_STRING_VALIDATE(n"-window", scaler[i].window.name, 0, validate_window_opt)
const struct m_sub_options gl_video_conf = {
.opts = (const m_option_t[]) {
OPT_FLAG("dumb-mode", dumb_mode, 0),
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),
SCALER_OPTS("scale", SCALER_SCALE),
SCALER_OPTS("dscale", SCALER_DSCALE),
SCALER_OPTS("cscale", SCALER_CSCALE),
SCALER_OPTS("tscale", SCALER_TSCALE),
OPT_INTRANGE("scaler-lut-size", scaler_lut_size, 0, 4, 10),
OPT_FLAG("scaler-resizes-only", scaler_resizes_only, 0),
OPT_FLAG("linear-scaling", linear_scaling, 0),
OPT_FLAG("correct-downscaling", correct_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},
{"rgba8", GL_RGBA8},
{"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},
{"auto", 0})),
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_INTRANGE("temporal-dither-period", temporal_dither_period, 0, 1, 128),
OPT_CHOICE("alpha", alpha_mode, 0,
({"no", 0},
{"yes", 1},
{"blend", 2},
{"blend-tiles", 3})),
OPT_FLAG("rectangle-textures", use_rectangle, 0),
OPT_COLOR("background", background, 0),
OPT_FLAG("interpolation", interpolation, 0),
OPT_FLOAT("interpolation-threshold", interpolation_threshold, 0),
OPT_CHOICE("blend-subtitles", blend_subs, 0,
({"no", 0},
{"yes", 1},
{"video", 2})),
OPT_STRING("scale-shader", scale_shader, 0),
OPT_STRINGLIST("pre-shaders", pre_shaders, 0),
OPT_STRINGLIST("post-shaders", post_shaders, 0),
OPT_FLAG("deband", deband, 0),
OPT_SUBSTRUCT("deband", deband_opts, deband_conf, 0),
OPT_FLOAT("sharpen", unsharp, 0),
OPT_CHOICE("prescale", prescale, 0,
({"none", 0},
{"superxbr", 1}
#if HAVE_NNEDI
, {"nnedi3", 2}
#endif
)),
OPT_INTRANGE("prescale-passes",
prescale_passes, 0, 1, MAX_PRESCALE_PASSES),
OPT_FLOATRANGE("prescale-downscaling-threshold",
prescale_downscaling_threshold, 0, 0.0, 32.0),
OPT_SUBSTRUCT("superxbr", superxbr_opts, superxbr_conf, 0),
OPT_SUBSTRUCT("nnedi3", nnedi3_opts, nnedi3_conf, 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_REMOVED("source-shader", "use :deband to enable debanding"),
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"),
OPT_REPLACED("fancy-downscaling", "correct-downscaling"),
{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, struct mp_image *mpi);
static void assign_options(struct gl_video_opts *dst, struct gl_video_opts *src);
static void get_scale_factors(struct gl_video *p, double xy[2]);
#define GLSL(x) gl_sc_add(p->sc, #x "\n");
#define GLSLF(...) gl_sc_addf(p->sc, __VA_ARGS__)
#define GLSLHF(...) gl_sc_haddf(p->sc, __VA_ARGS__)
// Return a fixed point texture format with given characteristics.
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 bool is_integer_format(const struct fmt_entry *fmt)
{
// Tests only the formats which we actually declare somewhere.
switch (fmt->format) {
case GL_RED_INTEGER:
case GL_RG_INTEGER:
case GL_RGB_INTEGER:
case GL_RGBA_INTEGER:
return true;
}
return false;
}
static const char *load_cached_file(struct gl_video *p, const char *path)
{
if (!path || !path[0])
return NULL;
for (int n = 0; n < p->num_files; n++) {
if (strcmp(p->files[n].path, path) == 0)
return p->files[n].body;
}
// not found -> load it
if (p->num_files == MP_ARRAY_SIZE(p->files)) {
// empty cache when it overflows
for (int n = 0; n < p->num_files; n++) {
talloc_free(p->files[n].path);
talloc_free(p->files[n].body);
}
p->num_files = 0;
}
struct bstr s = stream_read_file(path, p, p->global, 100000); // 100 kB
if (s.len) {
struct cached_file *new = &p->files[p->num_files++];
*new = (struct cached_file) {
.path = talloc_strdup(p, path),
.body = s.start
};
return new->body;
}
return NULL;
}
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 = MP_NOPTS_VALUE;
p->surface_idx = 0;
p->surface_now = 0;
p->frames_drawn = 0;
p->output_fbo_valid = false;
}
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 < SCALER_COUNT; n++)
uninit_scaler(p, &p->scaler[n]);
gl->DeleteTextures(1, &p->dither_texture);
p->dither_texture = 0;
gl->DeleteBuffers(1, &p->nnedi3_weights_buffer);
p->nnedi3_weights_buffer = 0;
for (int n = 0; n < 4; n++) {
fbotex_uninit(&p->merge_fbo[n]);
fbotex_uninit(&p->deband_fbo[n]);
fbotex_uninit(&p->scale_fbo[n]);
fbotex_uninit(&p->integer_fbo[n]);
}
fbotex_uninit(&p->indirect_fbo);
fbotex_uninit(&p->blend_subs_fbo);
fbotex_uninit(&p->unsharp_fbo);
for (int n = 0; n < 2; n++) {
fbotex_uninit(&p->pre_fbo[n]);
fbotex_uninit(&p->post_fbo[n]);
}
for (int pass = 0; pass < MAX_PRESCALE_PASSES; pass++) {
for (int step = 0; step < MAX_PRESCALE_STEPS; step++)
fbotex_uninit(&p->prescale_fbo[pass][step]);
}
for (int n = 0; n < FBOSURFACES_MAX; n++)
fbotex_uninit(&p->surfaces[n].fbotex);
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) || gl->es) {
MP_ERR(p, "16 bit fixed point 3D textures not available.\n");
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);
}
// Fill an img_tex struct from an FBO + some metadata
static struct img_tex img_tex_fbo(struct fbotex *fbo, struct gl_transform t,
enum plane_type type, int components)
{
assert(type != PLANE_NONE);
return (struct img_tex){
.type = type,
.gl_tex = fbo->texture,
.gl_target = GL_TEXTURE_2D,
.multiplier = 1.0,
.use_integer = false,
.tex_w = fbo->rw,
.tex_h = fbo->rh,
.w = fbo->lw,
.h = fbo->lh,
.transform = t,
.components = components,
};
}
// Bind an img_tex to a free texture unit and return its ID. At most
// TEXUNIT_VIDEO_NUM texture units can be bound at once
static int pass_bind(struct gl_video *p, struct img_tex tex)
{
assert(p->pass_tex_num < TEXUNIT_VIDEO_NUM);
p->pass_tex[p->pass_tex_num] = tex;
return p->pass_tex_num++;
}
// Places a video_image's image textures + associated metadata into tex[]. The
// number of textures is equal to p->plane_count.
static void pass_get_img_tex(struct gl_video *p, struct video_image *vimg,
struct img_tex tex[4])
{
assert(vimg->mpi);
// Determine the chroma offset
struct gl_transform chroma = (struct gl_transform){{{0}}};
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].w / vimg->planes[1].w;
chroma.m[1][1] = ls_h * (float)vimg->planes[0].h / vimg->planes[1].h;
// The existing code assumes we just have a single tex multiplier for
// all of the planes. This may change in the future
float tex_mul = 1.0 / mp_get_csp_mul(p->image_params.colorspace,
p->image_desc.component_bits,
p->image_desc.component_full_bits);
memset(tex, 0, 4 * sizeof(tex[0]));
for (int n = 0; n < p->plane_count; n++) {
struct texplane *t = &vimg->planes[n];
enum plane_type type;
if (n >= 3) {
type = PLANE_ALPHA;
} else if (p->image_desc.flags & MP_IMGFLAG_RGB) {
type = PLANE_RGB;
} else if (p->image_desc.flags & MP_IMGFLAG_YUV) {
type = n == 0 ? PLANE_LUMA : PLANE_CHROMA;
} else if (p->image_desc.flags & MP_IMGFLAG_XYZ) {
type = PLANE_XYZ;
} else {
abort();
}
tex[n] = (struct img_tex){
.type = type,
.gl_tex = t->gl_texture,
.gl_target = t->gl_target,
.multiplier = tex_mul,
.use_integer = t->use_integer,
.tex_w = t->w,
.tex_h = t->h,
.w = t->w,
.h = t->h,
.transform = type == PLANE_CHROMA ? chroma : identity_trans,
.components = p->image_desc.components[n],
};
}
}
static void init_video(struct gl_video *p)
{
GL *gl = p->gl;
init_format(p->image_params.imgfmt, p);
p->gl_target = p->opts.use_rectangle ? GL_TEXTURE_RECTANGLE : GL_TEXTURE_2D;
check_gl_features(p);
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->image_params.imgfmt = p->image_desc.id;
p->gl_target = p->hwdec->gl_texture_target;
}
mp_image_params_guess_csp(&p->image_params);
int eq_caps = MP_CSP_EQ_CAPS_GAMMA;
if (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;
struct mp_image layout = {0};
mp_image_set_params(&layout, &p->image_params);
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
plane->gl_target = p->gl_target;
plane->w = mp_image_plane_w(&layout, n);
plane->h = mp_image_plane_h(&layout, n);
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->w, plane->h, 0,
plane->gl_format, plane->gl_type, NULL);
int filter = plane->use_integer ? GL_NEAREST : GL_LINEAR;
gl->TexParameteri(p->gl_target, GL_TEXTURE_MIN_FILTER, filter);
gl->TexParameteri(p->gl_target, GL_TEXTURE_MAG_FILTER, filter);
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->w, plane->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];
if (!p->hwdec_active)
gl->DeleteTextures(1, &plane->gl_texture);
plane->gl_texture = 0;
gl->DeleteBuffers(1, &plane->gl_buffer);
plane->gl_buffer = 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 < p->pass_tex_num; n++) {
struct img_tex *s = &p->pass_tex[n];
if (!s->gl_tex)
continue;
char texture_name[32];
char texture_size[32];
char pixel_size[32];
snprintf(texture_name, sizeof(texture_name), "texture%d", n);
snprintf(texture_size, sizeof(texture_size), "texture_size%d", n);
snprintf(pixel_size, sizeof(pixel_size), "pixel_size%d", n);
if (s->use_integer) {
gl_sc_uniform_sampler_ui(sc, texture_name, n);
} else {
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_sc_uniform_vec2(sc, pixel_size, (GLfloat[]){1.0f / f[0],
1.0f / f[1]});
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 < p->pass_tex_num; i++) {
struct img_tex *s = &p->pass_tex[i];
if (!s->gl_tex)
continue;
struct mp_rect_f src_rect = {0, 0, s->w, s->h};
gl_transform_rect(s->transform, &src_rect);
float tx[2] = {src_rect.x0, src_rect.x1};
float ty[2] = {src_rect.y0, src_rect.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));
p->pass_tex_num = 0;
}
// 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
// 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 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->rw, dst_fbo->rh,
&(struct mp_rect){0, 0, w, h}, 0);
}
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_params.w,
p->image_params.h});
}
static const char *get_custom_shader_fn(struct gl_video *p, const char *body)
{
if (!p->gl->es && strstr(body, "sample") && !strstr(body, "sample_pixel")) {
if (!p->custom_shader_fn_warned) {
MP_WARN(p, "sample() is deprecated in custom shaders. "
"Use sample_pixel()\n");
p->custom_shader_fn_warned = true;
}
return "sample";
}
return "sample_pixel";
}
// 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, int w, int h,
struct fbotex textures[2])
{
if (!shaders)
return false;
bool success = false;
int tex = 0;
for (int n = 0; shaders[n]; n++) {
const char *body = load_cached_file(p, shaders[n]);
if (!body)
continue;
finish_pass_fbo(p, &textures[tex], w, h, 0);
int id = pass_bind(p, img_tex_fbo(&textures[tex], identity_trans,
PLANE_RGB, 4));
GLSLHF("#define pixel_size pixel_size%d\n", id);
load_shader(p, body);
const char *fn_name = get_custom_shader_fn(p, body);
GLSLF("// custom shader\n");
GLSLF("color = %s(texture%d, texcoord%d, texture_size%d);\n",
fn_name, id, id, id);
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 &&
a.clamp == b.clamp;
}
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->kernel->clamp = conf->clamp;
scaler->insufficient = !mp_init_filter(scaler->kernel, sizes, scale_factor);
if (scaler->kernel->polar && (gl->mpgl_caps & MPGL_CAP_1D_TEX)) {
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);
scaler->lut_size = 1 << p->opts.scaler_lut_size;
float *weights = talloc_array(NULL, float, scaler->lut_size * size);
mp_compute_lut(scaler->kernel, scaler->lut_size, weights);
if (target == GL_TEXTURE_1D) {
gl->TexImage1D(target, 0, fmt->internal_format, scaler->lut_size,
0, fmt->format, GL_FLOAT, weights);
} else {
gl->TexImage2D(target, 0, fmt->internal_format, width, scaler->lut_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");
}
// Special helper for sampling from two separated stages
static void pass_sample_separated(struct gl_video *p, struct img_tex src,
struct scaler *scaler, int w, int h)
{
// Separate the transformation into x and y components, per pass
struct gl_transform t_x = {
.m = {{src.transform.m[0][0], 0.0}, {src.transform.m[1][0], 1.0}},
.t = {src.transform.t[0], 0.0},
};
struct gl_transform t_y = {
.m = {{1.0, src.transform.m[0][1]}, {0.0, src.transform.m[1][1]}},
.t = {0.0, src.transform.t[1]},
};
// First pass (scale only in the y dir)
src.transform = t_y;
sampler_prelude(p->sc, pass_bind(p, src));
GLSLF("// pass 1\n");
pass_sample_separated_gen(p->sc, scaler, 0, 1);
GLSLF("color *= %f;\n", src.multiplier);
finish_pass_fbo(p, &scaler->sep_fbo, src.w, h, FBOTEX_FUZZY_H);
// Second pass (scale only in the x dir)
src = img_tex_fbo(&scaler->sep_fbo, t_x, src.type, src.components);
sampler_prelude(p->sc, pass_bind(p, src));
GLSLF("// pass 2\n");
pass_sample_separated_gen(p->sc, scaler, 1, 0);
}
// Sample from img_tex, with the src rectangle given by it.
// 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 write the scaled contents to the vec4 "color".
// 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, struct img_tex tex,
struct scaler *scaler, const struct scaler_config *conf,
double scale_factor, int w, int h)
{
reinit_scaler(p, scaler, conf, scale_factor, filter_sizes);
bool is_separated = scaler->kernel && !scaler->kernel->polar;
// Set up the transformation+prelude and bind the texture, for everything
// other than separated scaling (which does this in the subfunction)
if (!is_separated)
sampler_prelude(p->sc, pass_bind(p, tex));
// Dispatch the scaler. They're all wildly different.
const char *name = scaler->conf.kernel.name;
if (strcmp(name, "bilinear") == 0) {
GLSL(color = texture(tex, pos);)
} else if (strcmp(name, "bicubic_fast") == 0) {
pass_sample_bicubic_fast(p->sc);
} else if (strcmp(name, "oversample") == 0) {
pass_sample_oversample(p->sc, scaler, w, h);
} else if (strcmp(name, "custom") == 0) {
const char *body = load_cached_file(p, p->opts.scale_shader);
if (body) {
load_shader(p, body);
const char *fn_name = get_custom_shader_fn(p, body);
GLSLF("// custom scale-shader\n");
GLSLF("color = %s(tex, pos, size);\n", fn_name);
} else {
p->opts.scale_shader = NULL;
}
} else if (scaler->kernel && scaler->kernel->polar) {
pass_sample_polar(p->sc, scaler);
} else if (scaler->kernel) {
pass_sample_separated(p, tex, scaler, w, h);
} else {
// Should never happen
abort();
}
// Apply any required multipliers. Separated scaling already does this in
// its first stage
if (!is_separated)
GLSLF("color *= %f;\n", tex.multiplier);
// Micro-optimization: Avoid scaling unneeded channels
if (!p->has_alpha || p->opts.alpha_mode != 1)
GLSL(color.a = 1.0;)
}
// Get the number of passes for prescaler, with given display size.
static int get_prescale_passes(struct gl_video *p, struct img_tex tex[4])
{
if (!p->opts.prescale)
return 0;
// Return 0 if no luma planes exist
for (int n = 0; ; n++) {
if (n > 4)
return 0;
if (tex[n].type == PLANE_LUMA)
break;
}
// The downscaling threshold check is turned off.
if (p->opts.prescale_downscaling_threshold < 1.0f)
return p->opts.prescale_passes;
double scale_factors[2];
get_scale_factors(p, scale_factors);
int passes = 0;
for (; passes < p->opts.prescale_passes; passes ++) {
// The scale factor happens to be the same for superxbr and nnedi3.
scale_factors[0] /= 2;
scale_factors[1] /= 2;
if (1.0f / scale_factors[0] > p->opts.prescale_downscaling_threshold)
break;
if (1.0f / scale_factors[1] > p->opts.prescale_downscaling_threshold)
break;
}
return passes;
}
// Upload the NNEDI3 UBO weights only if needed
static void upload_nnedi3_weights(struct gl_video *p)
{
GL *gl = p->gl;
if (p->opts.nnedi3_opts->upload == NNEDI3_UPLOAD_UBO &&
!p->nnedi3_weights_buffer)
{
gl->GenBuffers(1, &p->nnedi3_weights_buffer);
gl->BindBufferBase(GL_UNIFORM_BUFFER, 0, p->nnedi3_weights_buffer);
int size;
const float *weights = get_nnedi3_weights(p->opts.nnedi3_opts, &size);
MP_VERBOSE(p, "Uploading NNEDI3 weights via UBO (size=%d)\n", size);
// We don't know the endianness of GPU, just assume it's LE
gl->BufferData(GL_UNIFORM_BUFFER, size, weights, GL_STATIC_DRAW);
}
}
// Applies a single pass of the prescaler, and accumulates the offset in
// pass_transform.
static void pass_prescale(struct gl_video *p, struct img_tex *tex,
struct gl_transform *pass_transform,
struct fbotex fbo[MAX_PRESCALE_STEPS])
{
// Happens to be the same for superxbr and nnedi3.
const int num_steps = 2;
for (int step = 0; step < num_steps; step++) {
struct gl_transform step_transform = {{{0}}};
int id = pass_bind(p, *tex);
switch(p->opts.prescale) {
case 1:
pass_superxbr(p->sc, tex->components, id, step, tex->multiplier,
p->opts.superxbr_opts, &step_transform);
break;
case 2:
upload_nnedi3_weights(p);
pass_nnedi3(p->gl, p->sc, tex->components, id, step, tex->multiplier,
p->opts.nnedi3_opts, &step_transform);
break;
default:
abort();
}
int new_w = tex->w * (int)step_transform.m[0][0],
new_h = tex->h * (int)step_transform.m[1][1];
finish_pass_fbo(p, &fbo[step], new_w, new_h, 0);
*tex = img_tex_fbo(&fbo[step], identity_trans, tex->type, tex->components);
// Accumulate the local transform
gl_transform_trans(step_transform, pass_transform);
}
}
// Copy a texture to the vec4 color, while increasing offset. Also applies
// the texture multiplier to the sampled color
static void copy_img_tex(struct gl_video *p, int *offset, struct img_tex img)
{
int count = img.components;
assert(*offset + count <= 4);
int id = pass_bind(p, img);
const char *src = "wzyx" + (4 - count);
const char *dst = (const char*[4]){"wzyx", "wzy", "wz", "w"}[*offset]
+ (4 - *offset - count);
if (img.use_integer) {
uint64_t tex_max = 1ull << p->image_desc.component_full_bits;
img.multiplier *= 1.0 / (tex_max - 1);
}
GLSLF("color.%s = %f * vec4(texture(texture%d, texcoord%d)).%s;\n",
dst, img.multiplier, id, id, src);
*offset += count;
}
// sample from video textures, set "color" variable to yuv value
static void pass_read_video(struct gl_video *p)
{
struct img_tex tex[4];
pass_get_img_tex(p, &p->image, tex);
// Most of the steps here don't actually apply image transformations yet,
// save for the actual upscaling - so as a code convenience we store them
// separately
struct gl_transform transforms[4];
struct gl_transform tex_trans = identity_trans;
for (int i = 0; i < 4; i++) {
transforms[i] = tex[i].transform;
tex[i].transform = identity_trans;
}
int prescale_passes = get_prescale_passes(p, tex);
int dst_w = p->texture_w << prescale_passes,
dst_h = p->texture_h << prescale_passes;
bool needs_deband[4];
int scaler_id[4]; // ID if needed, -1 otherwise
int needs_prescale[4]; // number of prescaling passes left
// Determine what needs to be done for which plane
for (int i=0; i < 4; i++) {
enum plane_type type = tex[i].type;
if (type == PLANE_NONE) {
needs_deband[i] = false;
needs_prescale[i] = 0;
scaler_id[i] = -1;
continue;
}
needs_deband[i] = type != PLANE_ALPHA ? p->opts.deband : false;
needs_prescale[i] = type == PLANE_LUMA ? prescale_passes : 0;
scaler_id[i] = -1;
switch (type) {
case PLANE_RGB:
case PLANE_LUMA:
case PLANE_XYZ:
scaler_id[i] = SCALER_SCALE;
break;
case PLANE_CHROMA:
scaler_id[i] = SCALER_CSCALE;
break;
case PLANE_ALPHA: // always use bilinear for alpha
default:
continue;
}
// We can skip scaling if the texture is already at the required size
if (tex[i].w == dst_w && tex[i].h == dst_h)
scaler_id[i] = -1;
}
// Process all the planes that need some action performed
while (true) {
// Find next plane to operate on
int n = -1;
for (int i = 0; i < 4; i++) {
if (tex[i].type != PLANE_NONE &&
(scaler_id[i] >= 0 || needs_deband[i] || needs_prescale[i]))
{
n = i;
break;
}
}
if (n == -1) // no textures left
break;
// Figure out if it needs to be merged with anything else first
int o = -1;
for (int i = n+1; i < 4; i++) {
if (tex[i].type == tex[n].type
&& tex[i].w == tex[n].w
&& tex[i].h == tex[n].h
&& gl_transform_eq(transforms[i], transforms[n]))
{
o = i;
break;
}
}
// Multiple planes share the same dimensions and type, merge them for
// upscaling/debanding efficiency
if (o != -1) {
GLSLF("// merging plane %d into %d\n", o, n);
int num = 0;
copy_img_tex(p, &num, tex[n]);
copy_img_tex(p, &num, tex[o]);
finish_pass_fbo(p, &p->merge_fbo[n], tex[n].w, tex[n].h, 0);
tex[n] = img_tex_fbo(&p->merge_fbo[n], identity_trans,
tex[n].type, num);
memset(&tex[o], 0, sizeof(tex[o]));
continue;
}
// The steps after this point (debanding, upscaling) can't handle
// integer textures, so the plane is still in that format by this point
// we need to ensure it gets converted
if (tex[n].use_integer) {
GLSLF("// use_integer fix for plane %d\n", n);
copy_img_tex(p, &(int){0}, tex[n]);
finish_pass_fbo(p, &p->integer_fbo[n], tex[n].w, tex[n].h, 0);
tex[n] = img_tex_fbo(&p->integer_fbo[n], identity_trans,
tex[n].type, tex[n].components);
continue;
}
// Plane is not yet debanded
if (needs_deband[n]) {
GLSLF("// debanding plane %d\n", n);
int id = pass_bind(p, tex[n]);
pass_sample_deband(p->sc, p->opts.deband_opts, id, tex[n].multiplier,
p->gl_target, &p->lfg);
// Optimization: Skip (clear) unused planes
for (int i = tex[n].components; i < 4; i++)
GLSLF("color.%c = %f;\n", "xyzw"[i], i == 3 ? 1.0 : 0.0);
finish_pass_fbo(p, &p->deband_fbo[n], tex[n].w, tex[n].h, 0);
tex[n] = img_tex_fbo(&p->deband_fbo[n], identity_trans,
tex[n].type, tex[n].components);
needs_deband[n] = false;
continue;
}
// Plane still needs prescaling passes
if (needs_prescale[n]) {
GLSLF("// prescaling plane %d (%d left)\n", n, needs_prescale[n]);
pass_prescale(p, &tex[n], &tex_trans,
p->prescale_fbo[needs_prescale[n]-1]);
needs_prescale[n]--;
// We can skip scaling if we arrived at our target res
if (tex[n].w == dst_w && tex[n].h == dst_h)
scaler_id[n] = -1;
// If we're done prescaling, we need to adjust all of the
// other transforms to make sure the planes still align
if (needs_prescale[n] == 0) {
for (int i = 0; i < 4; i++) {
if (n == i)
continue;
transforms[i].t[0] -= tex_trans.t[0] / tex_trans.m[0][0];
transforms[i].t[1] -= tex_trans.t[1] / tex_trans.m[1][1];
}
}
continue;
}
// Plane is not yet upscaled
if (scaler_id[n] >= 0) {
const struct scaler_config *conf = &p->opts.scaler[scaler_id[n]];
struct scaler *scaler = &p->scaler[scaler_id[n]];
// This is the only step that actually uses the transform
tex[n].transform = transforms[n];
// Bilinear scaling is a no-op due to GPU sampling
if (strcmp(conf->kernel.name, "bilinear") != 0) {
GLSLF("// upscaling plane %d\n", n);
pass_sample(p, tex[n], scaler, conf, 1.0, dst_w, dst_h);
finish_pass_fbo(p, &p->scale_fbo[n], dst_w, dst_h, FBOTEX_FUZZY);
tex[n] = img_tex_fbo(&p->scale_fbo[n], identity_trans,
tex[n].type, tex[n].components);
transforms[n] = identity_trans;
}
scaler_id[n] = -1;
continue;
}
// Execution should never reach this point
abort();
}
// All planes are of the same size and properly aligned at this point
GLSLF("// combining planes\n");
int coord = 0;
for (int i = 0; i < 4; i++) {
if (tex[i].type != PLANE_NONE)
copy_img_tex(p, &coord, tex[i]);
}
p->texture_w = dst_w;
p->texture_h = dst_h;
p->texture_offset = tex_trans;
}
// Utility function that simply binds an FBO and reads from it, without any
// transformations. Returns the ID of the texture unit it was bound to
static int pass_read_fbo(struct gl_video *p, struct fbotex *fbo)
{
struct img_tex tex = img_tex_fbo(fbo, identity_trans, PLANE_RGB, 4);
copy_img_tex(p, &(int){0}, tex);
return pass_bind(p, tex);
}
// 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 = p->image_desc.component_full_bits;
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 (cparams.colorspace == MP_CSP_XYZ)
GLSL(color.rgb = pow(color.rgb, vec3(2.6));) // linear light
// We always explicitly normalize the range in pass_read_video
cparams.input_bits = cparams.texture_bits = 0;
// Conversion to RGB. For RGB itself, this still applies e.g. brightness
// and contrast controls, or expansion of e.g. LSB-packed 10 bit data.
struct mp_cmat m = {{{0}}};
mp_get_csp_matrix(&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) {
// 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 against black
GLSL(color = vec4(color.rgb * color.a, 1.0);)
} else if (p->opts.alpha_mode == 3) { // blend against tiles
GLSL(bvec2 tile = lessThan(fract(gl_FragCoord.xy / 32.0), vec2(0.5));)
GLSL(vec3 background = vec3(tile.x == tile.y ? 1.0 : 0.75);)
GLSL(color.rgb = color.rgb * color.a + background * (1.0 - color.a);)
} else if (p->gl->fb_premultiplied) {
GLSL(color = vec4(color.rgb * color.a, color.a);)
}
}
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);
}
// Compute the cropped and rotated transformation of the video source rectangle.
// vp_w and vp_h are set to the _destination_ video size.
static void compute_src_transform(struct gl_video *p, struct gl_transform *tr,
int *vp_w, int *vp_h)
{
float sx = (p->src_rect.x1 - p->src_rect.x0) / (float)p->texture_w,
sy = (p->src_rect.y1 - p->src_rect.y0) / (float)p->texture_h,
ox = p->src_rect.x0,
oy = p->src_rect.y0;
struct gl_transform transform = {{{sx,0.0}, {0.0,sy}}, {ox,oy}};
gl_transform_trans(p->texture_offset, &transform);
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);
}
*tr = transform;
}
// 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);
// actual scale factor should be divided by the scale factor of prescaling.
xy[0] /= p->texture_offset.m[0][0];
xy[1] /= p->texture_offset.m[1][1];
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[SCALER_SCALE];
struct scaler_config scaler_conf = p->opts.scaler[SCALER_SCALE];
if (p->opts.scaler_resizes_only && !downscaling && !upscaling) {
scaler_conf.kernel.name = "bilinear";
// bilinear is going to be used, just remove all sub-pixel offsets.
p->texture_offset.t[0] = (int)p->texture_offset.t[0];
p->texture_offset.t[1] = (int)p->texture_offset.t[1];
}
if (downscaling && p->opts.scaler[SCALER_DSCALE].kernel.name) {
scaler_conf = p->opts.scaler[SCALER_DSCALE];
scaler = &p->scaler[SCALER_DSCALE];
}
// When requesting correct-downscaling and the clip is anamorphic, and
// because only a single scale factor is used for both axes, enable it only
// when both axes are downscaled, and use the milder of the factors to not
// end up with too much blur on one axis (even if we end up with sub-optimal
// scale factor on the other axis). This is better than not respecting
// correct scaling at all for anamorphic clips.
double f = MPMAX(xy[0], xy[1]);
if (p->opts.correct_downscaling && f < 1.0)
scale_factor = 1.0 / f;
// Pre-conversion, like linear light/sigmoidization
GLSLF("// scaler pre-conversion\n");
if (p->use_linear)
pass_linearize(p->sc, 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) {
// 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);
}
struct gl_transform transform;
int vp_w, vp_h;
compute_src_transform(p, &transform, &vp_w, &vp_h);
GLSLF("// main scaling\n");
finish_pass_fbo(p, &p->indirect_fbo, p->texture_w, p->texture_h, 0);
pass_sample(p, img_tex_fbo(&p->indirect_fbo, transform, PLANE_RGB, 4),
scaler, &scaler_conf, scale_factor, vp_w, vp_h);
// Changes the texture size to display size after main scaler.
p->texture_w = vp_w;
p->texture_h = vp_h;
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->sc, 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->sc, trc_dst);
}
static void pass_dither(struct gl_video *p)
{
GL *gl = p->gl;
// Assume 8 bits per component if unknown.
int dst_depth = gl->fb_g ? gl->fb_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;
}
const struct fmt_entry *fmt = find_tex_format(gl, 2, 1);
tex_size = size;
// Prefer R16 texture since they provide higher precision.
if (fmt->internal_format) {
tex_iformat = fmt->internal_format;
tex_format = fmt->format;
} else {
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.0;\n", p->dither_size);
if (p->opts.temporal_dither) {
int phase = (p->frames_rendered / p->opts.temporal_dither_period) % 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.0 + dither_value + 0.5 / %d.0) / %d.0;\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(color = texture(osdtex, texcoord).bgra;)
break;
}
case SUBBITMAP_LIBASS: {
GLSLF("// OSD (libass)\n");
GLSL(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);
}
// Minimal rendering code path, for GLES or OpenGL 2.1 without proper FBOs.
static void pass_render_frame_dumb(struct gl_video *p, int fbo)
{
p->gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);
struct img_tex tex[4];
pass_get_img_tex(p, &p->image, tex);
struct gl_transform transform;
int vp_w, vp_h;
compute_src_transform(p, &transform, &vp_w, &vp_h);
struct gl_transform tchroma = transform;
tchroma.t[0] /= 1 << p->image_desc.chroma_xs;
tchroma.t[1] /= 1 << p->image_desc.chroma_ys;
int index = 0;
for (int i = 0; i < p->plane_count; i++) {
gl_transform_trans(tex[i].type == PLANE_CHROMA ? tchroma : transform,
&tex[i].transform);
copy_img_tex(p, &index, tex[i]);
}
pass_convert_yuv(p);
}
// The main rendering function, takes care of everything up to and including
// upscaling. p->image is rendered.
static void pass_render_frame(struct gl_video *p)
{
// initialize the texture parameters
p->texture_w = p->image_params.w;
p->texture_h = p->image_params.h;
p->texture_offset = identity_trans;
if (p->dumb_mode)
return;
p->use_linear = p->opts.linear_scaling || p->opts.sigmoid_upscaling;
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->texture_w, .h = p->texture_h,
.display_par = scale[1] / scale[0], // counter compensate scaling
};
finish_pass_fbo(p, &p->blend_subs_fbo,
p->texture_w, p->texture_h, 0);
pass_draw_osd(p, OSD_DRAW_SUB_ONLY, vpts, rect,
p->texture_w, p->texture_h, p->blend_subs_fbo.fbo, false);
GLSL(color = texture(texture0, texcoord0);)
}
apply_shaders(p, p->opts.pre_shaders, p->texture_w, p->texture_h, p->pre_fbo);
if (p->opts.unsharp != 0.0) {
finish_pass_fbo(p, &p->unsharp_fbo, p->texture_w, p->texture_h, 0);
pass_sample_unsharp(p->sc, p->opts.unsharp);
}
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_params.w,
.mt = -p->src_rect.y0, .mb = p->src_rect.y1 - p->image_params.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->sc, p->image_params.gamma);
finish_pass_fbo(p, &p->blend_subs_fbo, p->texture_w, p->texture_h,
FBOTEX_FUZZY);
pass_draw_osd(p, OSD_DRAW_SUB_ONLY, vpts, rect,
p->texture_w, p->texture_h, p->blend_subs_fbo.fbo, false);
pass_read_fbo(p, &p->blend_subs_fbo);
if (p->use_linear)
pass_linearize(p->sc, p->image_params.gamma);
}
apply_shaders(p, p->opts.post_shaders, p->texture_w, p->texture_h, p->post_fbo);
}
static void pass_draw_to_screen(struct gl_video *p, int fbo)
{
if (p->dumb_mode)
pass_render_frame_dumb(p, 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, struct vo_frame *t,
int fbo)
{
int vp_w = p->dst_rect.x1 - p->dst_rect.x0,
vp_h = p->dst_rect.y1 - p->dst_rect.y0;
// Reset the queue completely if this is a still image, to avoid any
// interpolation artifacts from surrounding frames when unpausing or
// framestepping
if (t->still)
gl_video_reset_surfaces(p);
// 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 == MP_NOPTS_VALUE) {
gl_video_upload_image(p, t->current);
pass_render_frame(p);
finish_pass_fbo(p, &p->surfaces[p->surface_now].fbotex,
vp_w, vp_h, FBOTEX_FUZZY);
p->surfaces[p->surface_now].pts = p->image.mpi->pts;
p->surface_idx = p->surface_now;
}
// Find the right frame for this instant
if (t->current&& t->current->pts != MP_NOPTS_VALUE) {
int next = fbosurface_wrap(p->surface_now + 1);
while (p->surfaces[next].pts != MP_NOPTS_VALUE &&
p->surfaces[next].pts > p->surfaces[p->surface_now].pts &&
p->surfaces[p->surface_now].pts < t->current->pts)
{
p->surface_now = next;
next = fbosurface_wrap(next + 1);
}
}
// 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_now+1 and D is
// surface_end.
struct scaler *tscale = &p->scaler[SCALER_TSCALE];
reinit_scaler(p, tscale, &p->opts.scaler[SCALER_TSCALE], 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_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 new frames while there's room in the queue. Note that technically,
// this should be done before the step where we find the right frame, but
// it only barely matters at the very beginning of playback, and this way
// makes the code much more linear.
int surface_dst = fbosurface_wrap(p->surface_idx+1);
for (int i = 0; i < t->num_frames; i++) {
// Avoid overwriting data we might still need
if (surface_dst == surface_bse - 1)
break;
struct mp_image *f = t->frames[i];
if (!mp_image_params_equal(&f->params, &p->real_image_params) ||
f->pts == MP_NOPTS_VALUE)
continue;
if (f->pts > p->surfaces[p->surface_idx].pts) {
gl_video_upload_image(p, f);
pass_render_frame(p);
finish_pass_fbo(p, &p->surfaces[surface_dst].fbotex,
vp_w, vp_h, FBOTEX_FUZZY);
p->surfaces[surface_dst].pts = f->pts;
p->surface_idx = surface_dst;
surface_dst = fbosurface_wrap(surface_dst+1);
}
}
// 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 == MP_NOPTS_VALUE ||
p->surfaces[ii].pts == MP_NOPTS_VALUE)
{
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
p->osd_pts = p->surfaces[surface_now].pts;
// Finally, draw the right mix of frames to the screen.
if (!valid || t->still) {
// surface_now is guaranteed to be valid, so we can safely use it.
pass_read_fbo(p, &p->surfaces[surface_now].fbotex);
p->is_interpolated = false;
} else {
double mix = t->vsync_offset / t->ideal_frame_duration;
// The scaler code always wants the fcoord to be between 0 and 1,
// so we try to adjust by using the previous set of N frames instead
// (which requires some extra checking to make sure it's valid)
if (mix < 0.0) {
int prev = fbosurface_wrap(surface_bse - 1);
if (p->surfaces[prev].pts != MP_NOPTS_VALUE &&
p->surfaces[prev].pts < p->surfaces[surface_bse].pts)
{
mix += 1.0;
surface_bse = prev;
} else {
mix = 0.0; // at least don't blow up, this should only
// ever happen at the start of playback
}
}
// Blend the frames together
if (oversample) {
double vsync_dist = t->vsync_interval / t->ideal_frame_duration,
threshold = tscale->conf.kernel.params[0];
threshold = isnan(threshold) ? 0.0 : threshold;
mix = (1 - mix) / vsync_dist;
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(color = mix(texture(texture0, texcoord0),
texture(texture1, texcoord1),
inter_coeff);)
} else {
gl_sc_uniform_f(p->sc, "fcoord", mix);
pass_sample_separated_gen(p->sc, tscale, 0, 0);
}
// Load all the required frames
for (int i = 0; i < size; i++) {
struct img_tex img =
img_tex_fbo(&p->surfaces[fbosurface_wrap(surface_bse+i)].fbotex,
identity_trans, PLANE_RGB, 4);
// Since the code in pass_sample_separated currently assumes
// the textures are bound in-order and starting at 0, we just
// assert to make sure this is the case (which it should always be)
int id = pass_bind(p, img);
assert(id == i);
}
MP_DBG(p, "inter frame dur: %f vsync: %f, mix: %f\n",
t->ideal_frame_duration, t->vsync_interval, mix);
p->is_interpolated = true;
}
pass_draw_to_screen(p, fbo);
p->frames_drawn += 1;
}
// (fbo==0 makes BindFramebuffer select the screen backbuffer)
void gl_video_render_frame(struct gl_video *p, struct vo_frame *frame, int fbo)
{
GL *gl = p->gl;
struct video_image *vimg = &p->image;
gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);
bool has_frame = frame->current || vimg->mpi;
if (!has_frame || 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 (has_frame) {
gl_sc_set_vao(p->sc, &p->vao);
bool interpolate = p->opts.interpolation && frame->display_synced &&
(p->frames_drawn || !frame->still);
if (interpolate) {
double ratio = frame->ideal_frame_duration / frame->vsync_interval;
if (fabs(ratio - 1.0) < p->opts.interpolation_threshold)
interpolate = false;
}
if (interpolate) {
gl_video_interpolate_frame(p, frame, fbo);
} else {
bool is_new = !frame->redraw && !frame->repeat;
if (is_new || !p->output_fbo_valid) {
p->output_fbo_valid = false;
gl_video_upload_image(p, frame->current);
pass_render_frame(p);
// For the non-interplation case, we draw to a single "cache"
// FBO to speed up subsequent re-draws (if any exist)
int dest_fbo = fbo;
if (frame->num_vsyncs > 1 && frame->display_synced &&
!p->dumb_mode && gl->BlitFramebuffer)
{
fbotex_change(&p->output_fbo, p->gl, p->log,
p->vp_w, abs(p->vp_h),
p->opts.fbo_format, 0);
dest_fbo = p->output_fbo.fbo;
p->output_fbo_valid = true;
}
pass_draw_to_screen(p, dest_fbo);
}
// "output fbo valid" and "output fbo needed" are equivalent
if (p->output_fbo_valid) {
gl->BindFramebuffer(GL_READ_FRAMEBUFFER, p->output_fbo.fbo);
gl->BindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
struct mp_rect rc = p->dst_rect;
if (p->vp_h < 0) {
rc.y1 = -p->vp_h - p->dst_rect.y0;
rc.y0 = -p->vp_h - p->dst_rect.y1;
}
gl->BlitFramebuffer(rc.x0, rc.y0, rc.x1, rc.y1,
rc.x0, rc.y0, rc.x1, rc.y1,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
gl->BindFramebuffer(GL_READ_FRAMEBUFFER, 0);
gl->BindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
}
}
}
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);
// The playloop calls this last before waiting some time until it decides
// to call flip_page(). Tell OpenGL to start execution of the GPU commands
// while we sleep (this happens asynchronously).
gl->Flush();
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 unmap_image(struct gl_video *p, struct mp_image *mpi)
{
GL *gl = p->gl;
bool ok = true;
struct video_image *vimg = &p->image;
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, plane->gl_buffer);
ok = gl->UnmapBuffer(GL_PIXEL_UNPACK_BUFFER) && ok;
mpi->planes[n] = NULL; // PBO offset 0
}
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
return ok;
}
static bool map_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;
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];
if (!plane->gl_buffer) {
gl->GenBuffers(1, &plane->gl_buffer);
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, plane->gl_buffer);
size_t buffer_size = mp_image_plane_h(mpi, n) * mpi->stride[n];
gl->BufferData(GL_PIXEL_UNPACK_BUFFER, buffer_size,
NULL, GL_DYNAMIC_DRAW);
}
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, plane->gl_buffer);
mpi->planes[n] = gl->MapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
if (!mpi->planes[n]) {
unmap_image(p, mpi);
return false;
}
}
memset(mpi->bufs, 0, sizeof(mpi->bufs));
return true;
}
static void gl_video_upload_image(struct gl_video *p, struct mp_image *mpi)
{
GL *gl = p->gl;
struct video_image *vimg = &p->image;
mpi = mp_image_new_ref(mpi);
if (!mpi)
abort();
talloc_free(vimg->mpi);
vimg->mpi = mpi;
p->osd_pts = mpi->pts;
p->frames_uploaded++;
if (p->hwdec_active) {
GLuint imgtex[4] = {0};
bool ok = p->hwdec->driver->map_image(p->hwdec, vimg->mpi, imgtex) >= 0;
for (int n = 0; n < p->plane_count; n++)
vimg->planes[n].gl_texture = ok ? imgtex[n] : -1;
return;
}
assert(mpi->num_planes == p->plane_count);
mp_image_t pbo_mpi = *mpi;
bool pbo = map_image(p, &pbo_mpi);
if (pbo) {
mp_image_copy(&pbo_mpi, mpi);
if (unmap_image(p, &pbo_mpi)) {
mpi = &pbo_mpi;
} else {
MP_FATAL(p, "Video PBO upload failed. Disabling PBOs.\n");
pbo = false;
p->opts.pbo = 0;
}
}
vimg->image_flipped = mpi->stride[0] < 0;
for (int n = 0; n < p->plane_count; n++) {
struct texplane *plane = &vimg->planes[n];
if (pbo)
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, plane->gl_buffer);
gl->ActiveTexture(GL_TEXTURE0 + n);
gl->BindTexture(plane->gl_target, plane->gl_texture);
glUploadTex(gl, plane->gl_target, plane->gl_format, plane->gl_type,
mpi->planes[n], mpi->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)
{
GL *gl = p->gl;
bool 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;
}
// Return whether dumb-mode can be used without disabling any features.
// Essentially, vo_opengl with mostly default settings will return true.
static bool check_dumb_mode(struct gl_video *p)
{
struct gl_video_opts *o = &p->opts;
if (p->use_integer_conversion)
return false;
if (o->dumb_mode)
return true;
if (o->target_prim || o->target_trc || o->linear_scaling ||
o->correct_downscaling || o->sigmoid_upscaling || o->interpolation ||
o->blend_subs || o->deband || o->unsharp || o->prescale)
return false;
// check remaining scalers (tscale is already implicitly excluded above)
for (int i = 0; i < SCALER_COUNT; i++) {
if (i != SCALER_TSCALE) {
const char *name = o->scaler[i].kernel.name;
if (name && strcmp(name, "bilinear") != 0)
return false;
}
}
if (o->pre_shaders && o->pre_shaders[0])
return false;
if (o->post_shaders && o->post_shaders[0])
return false;
if (p->use_lut_3d)
return false;
return true;
}
// 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_3d_tex = gl->mpgl_caps & MPGL_CAP_3D_TEX;
bool have_mix = gl->glsl_version >= 130;
bool have_texrg = gl->mpgl_caps & MPGL_CAP_TEX_RG;
if (have_fbo) {
if (!p->opts.fbo_format) {
p->opts.fbo_format = GL_RGBA16;
if (gl->es)
p->opts.fbo_format = have_float_tex ? GL_RGBA16F : GL_RGB10_A2;
}
have_fbo = test_fbo(p);
}
if (gl->es && p->opts.pbo) {
p->opts.pbo = 0;
MP_WARN(p, "Disabling PBOs (GLES unsupported).\n");
}
p->forced_dumb_mode = p->opts.dumb_mode || !have_fbo || !have_texrg;
bool voluntarily_dumb = check_dumb_mode(p);
if (p->forced_dumb_mode || voluntarily_dumb) {
if (voluntarily_dumb) {
MP_VERBOSE(p, "No advanced processing required. Enabling dumb mode.\n");
} else if (!p->opts.dumb_mode) {
MP_WARN(p, "High bit depth FBOs unsupported. Enabling dumb mode.\n"
"Most extended features will be disabled.\n");
}
p->dumb_mode = true;
p->use_lut_3d = false;
// Most things don't work, so whitelist all options that still work.
struct gl_video_opts new_opts = {
.gamma = p->opts.gamma,
.gamma_auto = p->opts.gamma_auto,
.pbo = p->opts.pbo,
.fbo_format = p->opts.fbo_format,
.alpha_mode = p->opts.alpha_mode,
.use_rectangle = p->opts.use_rectangle,
.background = p->opts.background,
.dither_algo = -1,
};
for (int n = 0; n < SCALER_COUNT; n++)
new_opts.scaler[n] = gl_video_opts_def.scaler[n];
assign_options(&p->opts, &new_opts);
p->opts.deband_opts = m_config_alloc_struct(NULL, &deband_conf);
return;
}
p->dumb_mode = false;
// 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 < SCALER_COUNT; n++) {
const struct filter_kernel *kernel =
mp_find_filter_kernel(p->opts.scaler[n].kernel.name);
if (kernel) {
char *reason = NULL;
if (!have_float_tex)
reason = "(float tex. missing)";
if (reason) {
p->opts.scaler[n].kernel.name = "bilinear";
MP_WARN(p, "Disabling scaler #%d %s.\n", 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");
}
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 (!have_mix && p->opts.deband) {
p->opts.deband = 0;
MP_WARN(p, "Disabling debanding (GLSL version too old).\n");
}
if (p->opts.prescale == 2) {
if (p->opts.nnedi3_opts->upload == NNEDI3_UPLOAD_UBO) {
// Check features for uniform buffer objects.
if (!gl->BindBufferBase || !gl->GetUniformBlockIndex) {
MP_WARN(p, "Disabling NNEDI3 (%s required).\n",
gl->es ? "OpenGL ES 3.0" : "OpenGL 3.1");
p->opts.prescale = 0;
}
} else if (p->opts.nnedi3_opts->upload == NNEDI3_UPLOAD_SHADER) {
// Check features for hard coding approach.
if ((!gl->es && gl->glsl_version < 330) ||
(gl->es && gl->glsl_version < 300))
{
MP_WARN(p, "Disabling NNEDI3 (%s required).\n",
gl->es ? "OpenGL ES 3.0" : "OpenGL 3.3");
p->opts.prescale = 0;
}
}
}
}
static void init_gl(struct gl_video *p)
{
GL *gl = p->gl;
debug_check_gl(p, "before init_gl");
MP_VERBOSE(p, "Reported display depth: R=%d, G=%d, B=%d\n",
gl->fb_r, gl->fb_g, gl->fb_b);
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");
}
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);
assign_options(&p->opts, &(struct gl_video_opts){0});
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';
}
// Like find_tex_format(), but takes bits (not bytes), and but if no fixed point
// format is available, return an unsigned integer format.
static const struct fmt_entry *find_plane_format(GL *gl, int bytes_per_comp,
int n_channels)
{
const struct fmt_entry *e = find_tex_format(gl, bytes_per_comp, n_channels);
if (e->format || gl->es < 300)
return e;
return &gl_ui_byte_formats_gles3[n_channels - 1 + (bytes_per_comp - 1) * 4];
}
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 | MP_IMGFLAG_RGB_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_plane_format(gl, (bits + 7) / 8, 1);
for (int p = 1; p < desc.num_planes; p++)
plane_format[p] = plane_format[0];
// RGB/planar
if (desc.flags & MP_IMGFLAG_RGB_P)
snprintf(init->color_swizzle, sizeof(init->color_swizzle), "brga");
goto supported;
}
}
// YUV/half-packed
if (desc.flags & MP_IMGFLAG_YUV_NV) {
int bits = desc.component_bits;
if ((desc.flags & MP_IMGFLAG_NE) && bits >= 8 && bits <= 16) {
plane_format[0] = find_plane_format(gl, (bits + 7) / 8, 1);
plane_format[1] = find_plane_format(gl, (bits + 7) / 8, 2);
if (desc.flags & MP_IMGFLAG_YUV_NV_SWAP)
snprintf(init->color_swizzle, sizeof(init->color_swizzle), "rbga");
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:
if (desc.component_bits > 8 && desc.component_bits < 16) {
if (init->texture_16bit_depth < 16)
return false;
}
int use_integer = -1;
for (int p = 0; p < desc.num_planes; p++) {
if (!plane_format[p]->format)
return false;
int use_int_plane = !!is_integer_format(plane_format[p]);
if (use_integer < 0)
use_integer = use_int_plane;
if (use_integer != use_int_plane)
return false; // mixed planes not supported
}
init->use_integer_conversion = use_integer;
if (init->use_integer_conversion && init->forced_dumb_mode)
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;
plane->use_integer = init->use_integer_conversion;
}
init->is_yuv = desc.flags & MP_IMGFLAG_YUV;
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_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,
.sc = gl_sc_create(gl, log),
};
for (int n = 0; n < SCALER_COUNT; n++)
p->scaler[n] = (struct scaler){.index = n};
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;
}
static void assign_options(struct gl_video_opts *dst, struct gl_video_opts *src)
{
talloc_free(dst->scale_shader);
talloc_free(dst->pre_shaders);
talloc_free(dst->post_shaders);
talloc_free(dst->deband_opts);
talloc_free(dst->superxbr_opts);
talloc_free(dst->nnedi3_opts);
*dst = *src;
if (src->deband_opts)
dst->deband_opts = m_sub_options_copy(NULL, &deband_conf, src->deband_opts);
if (src->superxbr_opts) {
dst->superxbr_opts = m_sub_options_copy(NULL, &superxbr_conf,
src->superxbr_opts);
}
if (src->nnedi3_opts) {
dst->nnedi3_opts = m_sub_options_copy(NULL, &nnedi3_conf,
src->nnedi3_opts);
}
for (int n = 0; n < SCALER_COUNT; n++) {
dst->scaler[n].kernel.name =
(char *)handle_scaler_opt(dst->scaler[n].kernel.name,
n == SCALER_TSCALE);
}
dst->scale_shader = talloc_strdup(NULL, dst->scale_shader);
dst->pre_shaders = dup_str_array(NULL, dst->pre_shaders);
dst->post_shaders = dup_str_array(NULL, dst->post_shaders);
}
// 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)
{
assign_options(&p->opts, opts);
check_gl_features(p);
uninit_rendering(p);
if (p->opts.interpolation && !p->global->opts->video_sync && !p->dsi_warned) {
MP_WARN(p, "Interpolation now requires enabling display-sync mode.\n"
"E.g.: --video-sync=display-resample\n");
p->dsi_warned = true;
}
}
void gl_video_configure_queue(struct gl_video *p, struct vo *vo)
{
int queue_size = 1;
// Figure out an adequate size for the interpolation queue. The larger
// the radius, the earlier we need to queue frames.
if (p->opts.interpolation) {
const struct filter_kernel *kernel =
mp_find_filter_kernel(p->opts.scaler[SCALER_TSCALE].kernel.name);
if (kernel) {
double radius = kernel->f.radius;
radius = radius > 0 ? radius : p->opts.scaler[SCALER_TSCALE].radius;
queue_size += 1 + ceil(radius);
} else {
// Oversample case
queue_size += 2;
}
}
vo_set_queue_params(vo, 0, queue_size);
}
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)
{
}
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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