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authorwm4 <wm4@mplayer2.org>2012-03-31 01:13:38 +0200
committerwm4 <wm4@mplayer2.org>2012-03-31 02:58:52 +0200
commit98052873dadf619536c3ab379d45a998f2cf0999 (patch)
tree33b1dfde0716a2e94b5c21d446aa227c5e502f1c /libvo/vo_gl3.c
parentb00c1335c83be933b96de9464779a0e74c34331d (diff)
downloadmpv-98052873dadf619536c3ab379d45a998f2cf0999.tar.bz2
mpv-98052873dadf619536c3ab379d45a998f2cf0999.tar.xz
libvo: add vo_gl3
This new vo is heavily based on vo_gl.c. It provides better scale filters, dithering, and optional color management with LittleCMS2. It requires OpenGL 3. Many features are enabled by default, so it will be slower than vo_gl. However, it can be tuned to behave almost as vo_gl.
Diffstat (limited to 'libvo/vo_gl3.c')
-rw-r--r--libvo/vo_gl3.c2418
1 files changed, 2418 insertions, 0 deletions
diff --git a/libvo/vo_gl3.c b/libvo/vo_gl3.c
new file mode 100644
index 0000000000..1947839816
--- /dev/null
+++ b/libvo/vo_gl3.c
@@ -0,0 +1,2418 @@
+/*
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * You can alternatively redistribute this file and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <stdbool.h>
+#include <assert.h>
+#include "config.h"
+
+#include <libavutil/avutil.h>
+
+#ifdef CONFIG_LCMS2
+#include <lcms2.h>
+#include "stream/stream.h"
+#endif
+
+#include "talloc.h"
+#include "bstr.h"
+#include "mp_msg.h"
+#include "subopt-helper.h"
+#include "video_out.h"
+#include "libmpcodecs/vfcap.h"
+#include "libmpcodecs/mp_image.h"
+#include "geometry.h"
+#include "osd.h"
+#include "sub/font_load.h"
+#include "sub/sub.h"
+#include "eosd_packer.h"
+
+#include "gl_common.h"
+#include "filter_kernels.h"
+#include "aspect.h"
+#include "fastmemcpy.h"
+#include "sub/ass_mp.h"
+
+// Generated from libvo/vo_gl3_shaders.glsl
+#include "libvo/vo_gl3_shaders.h"
+
+// How many parts the OSD may consist of at most.
+#define MAX_OSD_PARTS 20
+
+// Pixel width of 1D lookup textures.
+#define LOOKUP_TEXTURE_SIZE 256
+
+// Texture units 0-2 are used by the video, with unit 0 for free use.
+// Units 3-4 are used for scaler LUTs.
+#define TEXUNIT_SCALERS 3
+#define TEXUNIT_3DLUT 5
+#define TEXUNIT_DITHER 6
+
+// lscale/cscale arguments that map directly to shader filter routines.
+// Note that the convolution filters are not included in this list.
+static const char *fixed_scale_filters[] = {
+ "bilinear",
+ "bicubic_fast",
+ "sharpen3",
+ "sharpen5",
+ NULL
+};
+
+struct lut_tex_format {
+ int pixels;
+ GLint internal_format;
+ GLenum format;
+};
+
+// Indexed with filter_kernel->size.
+// This must match the weightsN functions in the shader.
+// Each entry uses (size+3)/4 pixels per LUT entry, and size/pixels components
+// per pixel.
+struct lut_tex_format lut_tex_formats[] = {
+ [2] = {1, GL_RG16F, GL_RG},
+ [4] = {1, GL_RGBA16F, GL_RGBA},
+ [6] = {2, GL_RGB16F, GL_RGB},
+ [8] = {2, GL_RGBA16F, GL_RGBA},
+ [12] = {3, GL_RGBA16F, GL_RGBA},
+ [16] = {4, GL_RGBA16F, GL_RGBA},
+};
+
+// must be sorted, and terminated with 0
+static const int filter_sizes[] = {2, 4, 6, 8, 12, 16, 0};
+
+struct vertex {
+ float position[2];
+ uint8_t color[4];
+ float texcoord[2];
+};
+
+#define VERTEX_ATTRIB_POSITION 0
+#define VERTEX_ATTRIB_COLOR 1
+#define VERTEX_ATTRIB_TEXCOORD 2
+
+// 2 triangles primitives per quad = 6 vertices per quad
+// (GL_QUAD is deprecated, strips can't be used with EOSD image lists)
+#define VERTICES_PER_QUAD 6
+
+struct texplane {
+ int shift_x, shift_y;
+ GLuint gl_texture;
+ int gl_buffer;
+ int buffer_size;
+ void *buffer_ptr;
+};
+
+struct scaler {
+ int index;
+ const char *name;
+ float params[2];
+ struct filter_kernel *kernel;
+ GLuint gl_lut;
+ const char *lut_name;
+
+ // kernel points here
+ struct filter_kernel kernel_storage;
+};
+
+struct fbotex {
+ GLuint fbo;
+ GLuint texture;
+ int tex_w, tex_h; // size of .texture
+ int vp_w, vp_h; // viewport of fbo / used part of the texture
+};
+
+struct gl_priv {
+ struct vo *vo;
+ MPGLContext *glctx;
+ GL *gl;
+ const char *shader_version;
+
+ int use_indirect;
+ int use_gamma;
+ int use_srgb;
+ int use_scale_sep;
+ int use_fancy_downscaling;
+ int use_lut_3d;
+ int use_npot;
+ int use_pbo;
+ int use_glFinish;
+ int use_gl_debug;
+ int use_gl2;
+
+ int dither_depth;
+ int swap_interval;
+ GLint fbo_format;
+ int stereo_mode;
+ int osd_color;
+
+ GLuint vertex_buffer;
+ GLuint vao;
+
+ GLuint osd_program, eosd_program;
+ GLuint indirect_program, scale_sep_program, final_program;
+
+ GLuint osd_textures[MAX_OSD_PARTS];
+ int osd_textures_count;
+ struct vertex osd_va[MAX_OSD_PARTS * VERTICES_PER_QUAD];
+
+ GLuint eosd_texture;
+ int eosd_texture_width, eosd_texture_height;
+ GLuint eosd_buffer;
+ struct vertex *eosd_va;
+ struct eosd_packer *eosd;
+
+ GLuint lut_3d_texture;
+ int lut_3d_w, lut_3d_h, lut_3d_d;
+ void *lut_3d_data;
+
+ GLuint dither_texture;
+ float dither_quantization;
+ float dither_multiply;
+
+ uint32_t image_width;
+ uint32_t image_height;
+ uint32_t image_format;
+ int texture_width;
+ int texture_height;
+
+ bool is_yuv;
+ bool is_linear_rgb;
+
+ // per pixel (full pixel when packed, each component when planar)
+ int plane_bytes;
+ int plane_bits;
+ int component_bits;
+
+ GLint gl_internal_format;
+ GLenum gl_format;
+ GLenum gl_type;
+
+ int plane_count;
+ struct texplane planes[3];
+
+ struct fbotex indirect_fbo; // RGB target
+ struct fbotex scale_sep_fbo; // first pass when doing 2 pass scaling
+
+ // state for luma (0) and chroma (1) scalers
+ struct scaler scalers[2];
+ // luma scaler parameters (the same are used for chroma)
+ float scaler_params[2];
+
+ struct mp_csp_details colorspace;
+ struct mp_csp_equalizer video_eq;
+
+ int mpi_flipped;
+ int vo_flipped;
+
+ struct vo_rect src_rect; // displayed part of the source video
+ struct vo_rect dst_rect; // video rectangle on output window
+ int border_x, border_y; // OSD borders
+ int vp_x, vp_y, vp_w, vp_h; // GL viewport
+};
+
+struct fmt_entry {
+ int mp_format;
+ GLint internal_format;
+ GLenum format;
+ int component_bits;
+ GLenum type;
+};
+
+static const struct fmt_entry mp_to_gl_formats[] = {
+ {IMGFMT_RGB48NE, GL_RGB16, GL_RGB, 16, GL_UNSIGNED_SHORT},
+ {IMGFMT_RGB24, GL_RGB, GL_RGB, 8, GL_UNSIGNED_BYTE},
+ {IMGFMT_RGBA, GL_RGBA, GL_RGBA, 8, GL_UNSIGNED_BYTE},
+ {IMGFMT_RGB15, GL_RGBA, GL_RGBA, 5, GL_UNSIGNED_SHORT_1_5_5_5_REV},
+ {IMGFMT_RGB16, GL_RGB, GL_RGB, 6, GL_UNSIGNED_SHORT_5_6_5_REV},
+ {IMGFMT_BGR15, GL_RGBA, GL_BGRA, 5, GL_UNSIGNED_SHORT_1_5_5_5_REV},
+ {IMGFMT_BGR16, GL_RGB, GL_RGB, 6, GL_UNSIGNED_SHORT_5_6_5},
+ {IMGFMT_BGR24, GL_RGB, GL_BGR, 8, GL_UNSIGNED_BYTE},
+ {IMGFMT_BGRA, GL_RGBA, GL_BGRA, 8, GL_UNSIGNED_BYTE},
+ {0},
+};
+
+
+static const char help_text[];
+
+static void uninit_rendering(struct gl_priv *p);
+static void delete_shaders(struct gl_priv *p);
+
+
+static void default_tex_params(struct GL *gl, GLenum target, GLint filter)
+{
+ gl->TexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);
+ gl->TexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);
+ gl->TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ gl->TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+}
+
+static void debug_check_gl(struct gl_priv *p, const char *msg)
+{
+ if (p->use_gl_debug)
+ glCheckError(p->gl, msg);
+}
+
+static void tex_size(struct gl_priv *p, int w, int h, int *texw, int *texh)
+{
+ if (p->use_npot) {
+ *texw = w;
+ *texh = h;
+ } else {
+ *texw = 32;
+ while (*texw < w)
+ *texw *= 2;
+ *texh = 32;
+ while (*texh < h)
+ *texh *= 2;
+ }
+}
+
+static void draw_triangles(struct gl_priv *p, struct vertex *vb, int vert_count)
+{
+ GL *gl = p->gl;
+
+ assert(vert_count % 3 == 0);
+
+ gl->BindBuffer(GL_ARRAY_BUFFER, p->vertex_buffer);
+ gl->BufferData(GL_ARRAY_BUFFER, vert_count * sizeof(struct vertex), vb,
+ GL_DYNAMIC_DRAW);
+ gl->BindBuffer(GL_ARRAY_BUFFER, 0);
+
+ gl->BindVertexArray(p->vao);
+ gl->DrawArrays(GL_TRIANGLES, 0, vert_count);
+ gl->BindVertexArray(0);
+
+ debug_check_gl(p, "after rendering");
+}
+
+// Write a textured quad to a vertex array.
+// va = destination vertex array, VERTICES_PER_QUAD entries will be overwritten
+// x0, y0, x1, y1 = destination coordinates of the quad
+// tx0, ty0, tx1, ty1 = source texture coordinates (usually in pixels)
+// texture_w, texture_h = size of the texture, or an inverse factor
+// color = optional color for all vertices, NULL for opaque white
+// flip = flip vertically
+static void write_quad(struct vertex *va,
+ float x0, float y0, float x1, float y1,
+ float tx0, float ty0, float tx1, float ty1,
+ float texture_w, float texture_h,
+ const uint8_t color[4], bool flip)
+{
+ static const uint8_t white[4] = { 255, 255, 255, 255 };
+
+ if (!color)
+ color = white;
+
+ tx0 /= texture_w;
+ ty0 /= texture_h;
+ tx1 /= texture_w;
+ ty1 /= texture_h;
+
+ if (flip) {
+ float tmp = ty0;
+ ty0 = ty1;
+ ty1 = tmp;
+ }
+
+#define COLOR_INIT {color[0], color[1], color[2], color[3]}
+ va[0] = (struct vertex) { {x0, y0}, COLOR_INIT, {tx0, ty0} };
+ va[1] = (struct vertex) { {x0, y1}, COLOR_INIT, {tx0, ty1} };
+ va[2] = (struct vertex) { {x1, y0}, COLOR_INIT, {tx1, ty0} };
+ va[3] = (struct vertex) { {x1, y1}, COLOR_INIT, {tx1, ty1} };
+ va[4] = va[2];
+ va[5] = va[1];
+#undef COLOR_INIT
+}
+
+static void fbotex_init(struct gl_priv *p, struct fbotex *fbo, int w, int h)
+{
+ GL *gl = p->gl;
+
+ assert(!fbo->fbo);
+ assert(!fbo->texture);
+
+ tex_size(p, w, h, &fbo->tex_w, &fbo->tex_h);
+
+ fbo->vp_w = w;
+ fbo->vp_h = h;
+
+ mp_msg(MSGT_VO, MSGL_V, "[gl] Create FBO: %dx%d\n", fbo->tex_w, fbo->tex_h);
+
+ gl->GenFramebuffers(1, &fbo->fbo);
+ gl->GenTextures(1, &fbo->texture);
+ gl->BindTexture(GL_TEXTURE_2D, fbo->texture);
+ gl->TexImage2D(GL_TEXTURE_2D, 0, p->fbo_format, fbo->tex_w, fbo->tex_h, 0,
+ GL_RGB, GL_UNSIGNED_BYTE, NULL);
+ default_tex_params(gl, GL_TEXTURE_2D, GL_LINEAR);
+ gl->BindFramebuffer(GL_FRAMEBUFFER, fbo->fbo);
+ gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D, fbo->texture, 0);
+
+ if (gl->CheckFramebufferStatus(GL_FRAMEBUFFER)
+ != GL_FRAMEBUFFER_COMPLETE)
+ {
+ mp_msg(MSGT_VO, MSGL_ERR, "[gl] Error: framebuffer completeness "
+ "check failed!\n");
+ }
+
+ gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
+
+ debug_check_gl(p, "after creating framebuffer & associated texture");
+}
+
+static void fbotex_uninit(struct gl_priv *p, struct fbotex *fbo)
+{
+ GL *gl = p->gl;
+
+ gl->DeleteFramebuffers(1, &fbo->fbo);
+ gl->DeleteTextures(1, &fbo->texture);
+ *fbo = (struct fbotex) {0};
+}
+
+static void matrix_ortho2d(float m[3][3], float x0, float x1,
+ float y0, float y1)
+{
+ memset(m, 0, 9 * sizeof(float));
+ m[0][0] = 2.0f / (x1 - x0);
+ m[1][1] = 2.0f / (y1 - y0);
+ m[2][0] = -(x1 + x0) / (x1 - x0);
+ m[2][1] = -(y1 + y0) / (y1 - y0);
+ m[2][2] = 1.0f;
+}
+
+static void update_uniforms(struct gl_priv *p, GLuint program)
+{
+ GL *gl = p->gl;
+ GLint loc;
+
+ if (program == 0)
+ return;
+
+ gl->UseProgram(program);
+
+ struct mp_csp_params cparams = {
+ .colorspace = p->colorspace,
+ .input_bits = p->plane_bits,
+ .texture_bits = (p->plane_bits + 7) & ~7,
+ };
+ mp_csp_copy_equalizer_values(&cparams, &p->video_eq);
+
+ loc = gl->GetUniformLocation(program, "transform");
+ if (loc >= 0) {
+ float matrix[3][3];
+ matrix_ortho2d(matrix, 0, p->vp_w, p->vp_h, 0);
+ gl->UniformMatrix3fv(loc, 1, GL_FALSE, &matrix[0][0]);
+ }
+
+ loc = gl->GetUniformLocation(program, "colormatrix");
+ if (loc >= 0) {
+ float yuv2rgb[3][4] = {{0}};
+ if (p->is_yuv)
+ mp_get_yuv2rgb_coeffs(&cparams, yuv2rgb);
+ gl->UniformMatrix4x3fv(loc, 1, GL_TRUE, &yuv2rgb[0][0]);
+ }
+
+ gl->Uniform3f(gl->GetUniformLocation(program, "inv_gamma"),
+ 1.0 / cparams.rgamma,
+ 1.0 / cparams.ggamma,
+ 1.0 / cparams.bgamma);
+
+ gl->Uniform1i(gl->GetUniformLocation(program, "texture1"), 0);
+ gl->Uniform1i(gl->GetUniformLocation(program, "texture2"), 1);
+ gl->Uniform1i(gl->GetUniformLocation(program, "texture3"), 2);
+
+ gl->Uniform1i(gl->GetUniformLocation(program, "lut_3d"), TEXUNIT_3DLUT);
+
+ for (int n = 0; n < 2; n++) {
+ const char *lut = p->scalers[n].lut_name;
+ if (lut)
+ gl->Uniform1i(gl->GetUniformLocation(program, lut),
+ TEXUNIT_SCALERS + n);
+ }
+
+ gl->Uniform1i(gl->GetUniformLocation(program, "dither"), TEXUNIT_DITHER);
+ gl->Uniform1f(gl->GetUniformLocation(program, "dither_quantization"),
+ p->dither_quantization);
+ gl->Uniform1f(gl->GetUniformLocation(program, "dither_multiply"),
+ p->dither_multiply);
+
+ float sparam1 = p->scaler_params[0];
+ gl->Uniform1f(gl->GetUniformLocation(program, "filter_param1"),
+ isnan(sparam1) ? 0.5f : sparam1);
+
+ gl->UseProgram(0);
+
+ debug_check_gl(p, "update_uniforms()");
+}
+
+static void update_all_uniforms(struct gl_priv *p)
+{
+ update_uniforms(p, p->osd_program);
+ update_uniforms(p, p->eosd_program);
+ update_uniforms(p, p->indirect_program);
+ update_uniforms(p, p->scale_sep_program);
+ update_uniforms(p, p->final_program);
+}
+
+#define SECTION_HEADER "#!section "
+
+static char *get_section(void *talloc_ctx, struct bstr source,
+ const char *section)
+{
+ char *res = talloc_strdup(talloc_ctx, "");
+ bool copy = false;
+ while (source.len) {
+ struct bstr line = bstr_getline(source, &source);
+ if (bstr_eatstart(&line, bstr(SECTION_HEADER))) {
+ copy = bstrcmp0(line, section) == 0;
+ } else if (copy) {
+ res = talloc_asprintf_append_buffer(res, "%.*s\n", BSTR_P(line));
+ }
+ }
+ return res;
+}
+
+static char *t_concat(void *talloc_ctx, const char *s1, const char *s2)
+{
+ return talloc_asprintf(talloc_ctx, "%s%s", s1, s2);
+}
+
+static GLuint create_shader(GL *gl, GLenum type, const char *header,
+ const char *source)
+{
+ void *tmp = talloc_new(NULL);
+ const char *full_source = t_concat(tmp, header, source);
+
+ GLuint shader = gl->CreateShader(type);
+ gl->ShaderSource(shader, 1, &full_source, NULL);
+ gl->CompileShader(shader);
+ GLint status;
+ gl->GetShaderiv(shader, GL_COMPILE_STATUS, &status);
+ GLint log_length;
+ gl->GetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
+
+ int pri = status ? (log_length > 1 ? MSGL_V : MSGL_DBG2) : MSGL_ERR;
+ const char *typestr = type == GL_VERTEX_SHADER ? "vertex" : "fragment";
+ if (mp_msg_test(MSGT_VO, pri)) {
+ mp_msg(MSGT_VO, pri, "[gl] %s shader source:\n", typestr);
+ mp_log_source(MSGT_VO, pri, full_source);
+ }
+ if (log_length > 1) {
+ GLchar *log = talloc_zero_size(tmp, log_length + 1);
+ gl->GetShaderInfoLog(shader, log_length, NULL, log);
+ mp_msg(MSGT_VO, pri, "[gl] %s shader compile log (status=%d):\n%s\n",
+ typestr, status, log);
+ }
+
+ talloc_free(tmp);
+
+ return shader;
+}
+
+static void prog_create_shader(GL *gl, GLuint program, GLenum type,
+ const char *header, const char *source)
+{
+ GLuint shader = create_shader(gl, type, header, source);
+ gl->AttachShader(program, shader);
+ gl->DeleteShader(shader);
+}
+
+static void link_shader(GL *gl, GLuint program)
+{
+ gl->LinkProgram(program);
+ GLint status;
+ gl->GetProgramiv(program, GL_LINK_STATUS, &status);
+ GLint log_length;
+ gl->GetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
+
+ int pri = status ? (log_length > 1 ? MSGL_V : MSGL_DBG2) : MSGL_ERR;
+ if (mp_msg_test(MSGT_VO, pri)) {
+ GLchar *log = talloc_zero_size(NULL, log_length + 1);
+ gl->GetProgramInfoLog(program, log_length, NULL, log);
+ mp_msg(MSGT_VO, pri, "[gl] shader link log (status=%d): %s\n",
+ status, log);
+ talloc_free(log);
+ }
+}
+
+static void bind_attrib_locs(GL *gl, GLuint program)
+{
+ gl->BindAttribLocation(program, VERTEX_ATTRIB_POSITION, "vertex_position");
+ gl->BindAttribLocation(program, VERTEX_ATTRIB_COLOR, "vertex_color");
+ gl->BindAttribLocation(program, VERTEX_ATTRIB_TEXCOORD, "vertex_texcoord");
+}
+
+static GLuint create_program(GL *gl, const char *name, const char *header,
+ const char *vertex, const char *frag)
+{
+ mp_msg(MSGT_VO, MSGL_V, "[gl] compiling shader program '%s'\n", name);
+ mp_msg(MSGT_VO, MSGL_V, "[gl] header:\n");
+ mp_log_source(MSGT_VO, MSGL_V, header);
+ GLuint prog = gl->CreateProgram();
+ prog_create_shader(gl, prog, GL_VERTEX_SHADER, header, vertex);
+ prog_create_shader(gl, prog, GL_FRAGMENT_SHADER, header, frag);
+ bind_attrib_locs(gl, prog);
+ link_shader(gl, prog);
+ return prog;
+}
+
+static void shader_def(char **shader, const char *name,
+ const char *value)
+{
+ *shader = talloc_asprintf_append(*shader, "#define %s %s\n", name, value);
+}
+
+static void shader_def_opt(char **shader, const char *name, bool b)
+{
+ if (b)
+ shader_def(shader, name, "1");
+}
+
+static void shader_setup_scaler(char **shader, struct scaler *scaler, int pass)
+{
+ const char *target = scaler->index == 0 ? "SAMPLE_L" : "SAMPLE_C";
+ if (!scaler->kernel) {
+ *shader = talloc_asprintf_append(*shader, "#define %s sample_%s\n",
+ target, scaler->name);
+ } else {
+ int size = scaler->kernel->size;
+ if (pass != -1) {
+ // The direction/pass assignment is rather arbitrary, but fixed in
+ // other parts of the code (like FBO setup).
+ const char *direction = pass == 0 ? "0, 1" : "1, 0";
+ *shader = talloc_asprintf_append(*shader, "#define %s(p0, p1) "
+ "sample_convolution_sep%d(vec2(%s), %s, p0, p1)\n",
+ target, size, direction, scaler->lut_name);
+ } else {
+ *shader = talloc_asprintf_append(*shader, "#define %s(p0, p1) "
+ "sample_convolution%d(%s, p0, p1)\n",
+ target, size, scaler->lut_name);
+ }
+ }
+}
+
+// return false if RGB or 4:4:4 YUV
+static bool input_is_subsampled(struct gl_priv *p)
+{
+ for (int i = 0; i < p->plane_count; i++)
+ if (p->planes[i].shift_x || p->planes[i].shift_y)
+ return true;
+ return false;
+}
+
+static void compile_shaders(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ delete_shaders(p);
+
+ void *tmp = talloc_new(NULL);
+
+ struct bstr src = { (char*)vo_gl3_shaders, sizeof(vo_gl3_shaders) };
+ char *vertex_shader = get_section(tmp, src, "vertex_all");
+ char *shader_prelude = get_section(tmp, src, "prelude");
+ char *s_video = get_section(tmp, src, "frag_video");
+ char *s_eosd = get_section(tmp, src, "frag_eosd");
+ char *s_osd = get_section(tmp, src, "frag_osd");
+
+ char *header = talloc_asprintf(tmp, "#version %s\n%s", p->shader_version,
+ shader_prelude);
+
+ char *header_eosd = talloc_strdup(tmp, header);
+ shader_def_opt(&header_eosd, "USE_3DLUT", p->use_lut_3d);
+
+ p->eosd_program =
+ create_program(gl, "eosd", header_eosd, vertex_shader, s_eosd);
+
+ p->osd_program =
+ create_program(gl, "osd", header, vertex_shader, s_osd);
+
+ char *header_conv = talloc_strdup(tmp, "");
+ char *header_final = talloc_strdup(tmp, "");
+ char *header_sep = NULL;
+
+ bool convert_input_to_linear = !p->is_linear_rgb
+ && (p->use_srgb || p->use_lut_3d);
+
+ shader_def_opt(&header_conv, "USE_PLANAR", p->plane_count > 1);
+ shader_def_opt(&header_conv, "USE_GBRP", p->image_format == IMGFMT_GBRP);
+ shader_def_opt(&header_conv, "USE_YGRAY", p->is_yuv && p->plane_count == 1);
+ shader_def_opt(&header_conv, "USE_COLORMATRIX", p->is_yuv);
+ shader_def_opt(&header_conv, "USE_LINEAR_CONV", convert_input_to_linear);
+
+ shader_def_opt(&header_final, "USE_LINEAR_CONV_INV", p->use_lut_3d);
+ shader_def_opt(&header_final, "USE_GAMMA_POW", p->use_gamma);
+ shader_def_opt(&header_final, "USE_3DLUT", p->use_lut_3d);
+ shader_def_opt(&header_final, "USE_DITHER", p->dither_texture != 0);
+
+ if (p->use_scale_sep && p->scalers[0].kernel) {
+ header_sep = talloc_strdup(tmp, "");
+ shader_def_opt(&header_sep, "FIXED_SCALE", true);
+ shader_setup_scaler(&header_sep, &p->scalers[0], 0);
+ shader_setup_scaler(&header_final, &p->scalers[0], 1);
+ } else {
+ shader_setup_scaler(&header_final, &p->scalers[0], -1);
+ }
+
+ // We want to do scaling in linear light. Scaling is closely connected to
+ // texture sampling due to how the shader is structured (or if GL bilinear
+ // scaling is used). The purpose of the "indirect" pass is to convert the
+ // input video to linear RGB.
+ // Another purpose is reducing input to a single texture for scaling.
+ bool use_indirect = p->use_indirect;
+
+ // Don't sample from input video textures before converting the input to
+ // linear light. (Unneeded when sRGB textures are used.)
+ if (convert_input_to_linear)
+ use_indirect = true;
+
+ // It doesn't make sense to scale the chroma with cscale in the 1. scale
+ // step and with lscale in the 2. step. If the chroma is subsampled, a
+ // convolution filter wouldn't even work entirely correctly, because the
+ // luma scaler would sample two texels instead of one per tap for chroma.
+ // Also, even with 4:4:4 YUV or planar RGB, the indirection might be faster,
+ // because the shader can't use one scaler for sampling from 3 textures. It
+ // has to fetch the coefficients for each texture separately, even though
+ // they're the same (this is not an inherent restriction, but would require
+ // to restructure the shader).
+ if (header_sep && p->plane_count > 1)
+ use_indirect = true;
+
+ if (input_is_subsampled(p)) {
+ shader_setup_scaler(&header_conv, &p->scalers[1], -1);
+ } else {
+ // Force using the luma scaler on chroma. If the "indirect" stage is
+ // used, the actual scaling will happen in the next stage.
+ shader_def(&header_conv, "SAMPLE_C",
+ use_indirect ? "sample_bilinear" : "SAMPLE_L");
+ }
+
+ if (use_indirect) {
+ // We don't use filtering for the Y-plane (luma), because it's never
+ // scaled in this scenario.
+ shader_def(&header_conv, "SAMPLE_L", "sample_bilinear");
+ shader_def_opt(&header_conv, "FIXED_SCALE", true);
+ header_conv = t_concat(tmp, header, header_conv);
+ p->indirect_program =
+ create_program(gl, "indirect", header_conv, vertex_shader, s_video);
+ } else if (header_sep) {
+ header_sep = t_concat(tmp, header_sep, header_conv);
+ } else {
+ header_final = t_concat(tmp, header_final, header_conv);
+ }
+
+ if (header_sep) {
+ header_sep = t_concat(tmp, header, header_sep);
+ p->scale_sep_program =
+ create_program(gl, "scale_sep", header_sep, vertex_shader, s_video);
+ }
+
+ header_final = t_concat(tmp, header, header_final);
+ p->final_program =
+ create_program(gl, "final", header_final, vertex_shader, s_video);
+
+ debug_check_gl(p, "shader compilation");
+
+ talloc_free(tmp);
+}
+
+static void delete_program(GL *gl, GLuint *prog)
+{
+ gl->DeleteProgram(*prog);
+ *prog = 0;
+}
+
+static void delete_shaders(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ delete_program(gl, &p->osd_program);
+ delete_program(gl, &p->eosd_program);
+ delete_program(gl, &p->indirect_program);
+ delete_program(gl, &p->scale_sep_program);
+ delete_program(gl, &p->final_program);
+}
+
+static double get_scale_factor(struct gl_priv *p)
+{
+ double sx = p->dst_rect.width / (double)p->src_rect.width;
+ double sy = p->dst_rect.height / (double)p->src_rect.height;
+ // xxx: actually we should use different scalers in X/Y directions if the
+ // scale factors are different due to anamorphic content
+ return FFMIN(sx, sy);
+}
+
+static bool update_scale_factor(struct gl_priv *p, struct filter_kernel *kernel)
+{
+ double scale = get_scale_factor(p);
+ if (!p->use_fancy_downscaling && scale < 1.0)
+ scale = 1.0;
+ return mp_init_filter(kernel, filter_sizes, FFMAX(1.0, 1.0 / scale));
+}
+
+static void init_scaler(struct gl_priv *p, struct scaler *scaler)
+{
+ GL *gl = p->gl;
+
+ assert(scaler->name);
+
+ scaler->kernel = NULL;
+
+ const struct filter_kernel *t_kernel = mp_find_filter_kernel(scaler->name);
+ if (!t_kernel)
+ return;
+
+ scaler->kernel_storage = *t_kernel;
+ scaler->kernel = &scaler->kernel_storage;
+
+ for (int n = 0; n < 2; n++) {
+ if (!isnan(p->scaler_params[n]))
+ scaler->kernel->params[n] = p->scaler_params[n];
+ }
+
+ update_scale_factor(p, scaler->kernel);
+
+ int size = scaler->kernel->size;
+ assert(size < FF_ARRAY_ELEMS(lut_tex_formats));
+ struct lut_tex_format *fmt = &lut_tex_formats[size];
+ bool use_2d = fmt->pixels > 1;
+ bool is_luma = scaler->index == 0;
+ scaler->lut_name = use_2d
+ ? (is_luma ? "lut_l_2d" : "lut_c_2d")
+ : (is_luma ? "lut_l_1d" : "lut_c_1d");
+
+ gl->ActiveTexture(GL_TEXTURE0 + TEXUNIT_SCALERS + scaler->index);
+ GLenum target = use_2d ? GL_TEXTURE_2D : GL_TEXTURE_1D;
+
+ if (!scaler->gl_lut)
+ gl->GenTextures(1, &scaler->gl_lut);
+
+ gl->BindTexture(target, scaler->gl_lut);
+ gl->PixelStorei(GL_UNPACK_ALIGNMENT, 4);
+ gl->PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+
+ float *weights = talloc_array(NULL, float, LOOKUP_TEXTURE_SIZE * size);
+ mp_compute_lut(scaler->kernel, LOOKUP_TEXTURE_SIZE, weights);
+ if (use_2d) {
+ gl->TexImage2D(GL_TEXTURE_2D, 0, fmt->internal_format, fmt->pixels,
+ LOOKUP_TEXTURE_SIZE, 0, fmt->format, GL_FLOAT,
+ weights);
+ } else {
+ gl->TexImage1D(GL_TEXTURE_1D, 0, fmt->internal_format,
+ LOOKUP_TEXTURE_SIZE, 0, fmt->format, GL_FLOAT,
+ weights);
+ }
+ talloc_free(weights);
+
+ gl->TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ gl->TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ gl->TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ gl->TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ gl->ActiveTexture(GL_TEXTURE0);
+
+ debug_check_gl(p, "after initializing scaler");
+}
+
+static void make_dither_matrix(unsigned char *m, int size)
+{
+ m[0] = 0;
+ for (int sz = 1; sz < size; sz *= 2) {
+ int offset[] = {sz*size, sz, sz * (size+1), 0};
+ for (int i = 0; i < 4; i++)
+ for (int y = 0; y < sz * size; y += size)
+ for (int x = 0; x < sz; x++)
+ m[x+y+offset[i]] = m[x+y] * 4 + (3-i) * 256/size/size;
+ }
+}
+
+static void init_dither(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ // Assume 8 bits per component if unknown.
+ int dst_depth = p->glctx->depth_g ? p->glctx->depth_g : 8;
+ if (p->dither_depth > 0)
+ dst_depth = p->dither_depth;
+
+ int src_depth = p->component_bits;
+ if (p->use_lut_3d)
+ src_depth = 16;
+
+ if (dst_depth >= src_depth || p->dither_depth < 0 || src_depth < 0)
+ return;
+
+ mp_msg(MSGT_VO, MSGL_V, "[gl] Dither %d->%d.\n", src_depth, dst_depth);
+
+ // This defines how many bits are considered significant for output on
+ // screen. The superfluous bits will be used for rounded according to the
+ // dither matrix. The precision of the source implicitly decides how many
+ // dither patterns can be visible.
+ p->dither_quantization = (1 << dst_depth) - 1;
+ int size = 8;
+ p->dither_multiply = p->dither_quantization + 1.0 / (size*size);
+ unsigned char dither[256];
+ make_dither_matrix(dither, 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->PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ gl->TexImage2D(GL_TEXTURE_2D, 0, GL_RED, size, size, 0, GL_RED,
+ GL_UNSIGNED_BYTE, dither);
+ 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->ActiveTexture(GL_TEXTURE0);
+}
+
+static void reinit_rendering(struct gl_priv *p)
+{
+ mp_msg(MSGT_VO, MSGL_V, "[gl] Reinit rendering.\n");
+
+ debug_check_gl(p, "before scaler initialization");
+
+ uninit_rendering(p);
+
+ init_dither(p);
+
+ init_scaler(p, &p->scalers[0]);
+ init_scaler(p, &p->scalers[1]);
+
+ compile_shaders(p);
+
+ if (p->indirect_program && !p->indirect_fbo.fbo)
+ fbotex_init(p, &p->indirect_fbo, p->texture_width, p->texture_height);
+}
+
+static void uninit_rendering(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ delete_shaders(p);
+
+ for (int n = 0; n < 2; n++) {
+ gl->DeleteTextures(1, &p->scalers->gl_lut);
+ p->scalers->gl_lut = 0;
+ p->scalers->lut_name = NULL;
+ p->scalers->kernel = NULL;
+ }
+
+ gl->DeleteTextures(1, &p->dither_texture);
+ p->dither_texture = 0;
+}
+
+static void init_lut_3d(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ gl->GenTextures(1, &p->lut_3d_texture);
+ gl->ActiveTexture(GL_TEXTURE0 + TEXUNIT_3DLUT);
+ gl->BindTexture(GL_TEXTURE_3D, p->lut_3d_texture);
+ gl->PixelStorei(GL_UNPACK_ALIGNMENT, 4);
+ gl->PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ gl->TexImage3D(GL_TEXTURE_3D, 0, GL_RGB16, p->lut_3d_w, p->lut_3d_h,
+ p->lut_3d_d, 0, GL_RGB, GL_UNSIGNED_SHORT, p->lut_3d_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);
+
+ debug_check_gl(p, "after 3d lut creation");
+}
+
+static void init_video(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ if (p->use_lut_3d && !p->lut_3d_texture)
+ init_lut_3d(p);
+
+ if (!p->is_yuv && (p->use_srgb || p->use_lut_3d)) {
+ p->is_linear_rgb = true;
+ p->gl_internal_format = GL_SRGB;
+ }
+
+ int eq_caps = MP_CSP_EQ_CAPS_GAMMA;
+ if (p->is_yuv)
+ eq_caps |= MP_CSP_EQ_CAPS_COLORMATRIX;
+ p->video_eq.capabilities = eq_caps;
+
+ debug_check_gl(p, "before video texture creation");
+
+ tex_size(p, p->image_width, p->image_height,
+ &p->texture_width, &p->texture_height);
+
+ for (int n = 0; n < p->plane_count; n++) {
+ struct texplane *plane = &p->planes[n];
+
+ int w = p->texture_width >> plane->shift_x;
+ int h = p->texture_height >> plane->shift_y;
+
+ mp_msg(MSGT_VO, MSGL_V, "[gl] Texture for plane %d: %dx%d\n", n, w, h);
+
+ gl->ActiveTexture(GL_TEXTURE0 + n);
+ gl->GenTextures(1, &plane->gl_texture);
+ gl->BindTexture(GL_TEXTURE_2D, plane->gl_texture);
+
+ gl->TexImage2D(GL_TEXTURE_2D, 0, p->gl_internal_format, w, h, 0,
+ p->gl_format, p->gl_type, NULL);
+ default_tex_params(gl, GL_TEXTURE_2D, GL_LINEAR);
+ }
+ gl->ActiveTexture(GL_TEXTURE0);
+
+ debug_check_gl(p, "after video texture creation");
+
+ reinit_rendering(p);
+}
+
+static void uninit_video(struct gl_priv *p)
+{
+ GL *gl = p->gl;
+
+ uninit_rendering(p);
+