2 * Copyright (c) 2014 Lukasz Marek
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 //TODO: support for more formats
22 //TODO: support for more systems.
23 //TODO: implement X11, Windows, Mac OS native default window. SDL 1.2 doesn't allow to render to custom thread.
34 #include <OpenGL/gl3.h>
41 #if HAVE_GLXGETPROCADDRESS
52 #include "libavutil/common.h"
53 #include "libavutil/pixdesc.h"
54 #include "libavutil/log.h"
55 #include "libavutil/opt.h"
56 #include "libavutil/avassert.h"
57 #include "libavutil/avstring.h"
58 #include "libavformat/avformat.h"
59 #include "libavdevice/avdevice.h"
60 #include "opengl_enc_shaders.h"
66 /* GL_RED_COMPONENT is used for plannar pixel types.
67 * Only red component is sampled in shaders.
68 * On some platforms GL_RED is not availabe and GL_LUMINANCE have to be used,
69 * but since OpenGL 3.0 GL_LUMINANCE is deprecated.
70 * GL_RED produces RGBA = value, 0, 0, 1.
71 * GL_LUMINANCE produces RGBA = value, value, value, 1.
72 * Note: GL_INTENSITY may also be used which produce RGBA = value, value, value, value. */
74 #define GL_RED_COMPONENT GL_RED
75 #elif defined(GL_LUMINANCE)
76 #define GL_RED_COMPONENT GL_LUMINANCE
78 #define GL_RED_COMPONENT 0x1903; //GL_RED
81 /* Constants not defined for iOS */
82 #define FF_GL_UNSIGNED_BYTE_3_3_2 0x8032
83 #define FF_GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
84 #define FF_GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
86 /* MinGW exposes only OpenGL 1.1 API */
87 #define FF_GL_ARRAY_BUFFER 0x8892
88 #define FF_GL_ELEMENT_ARRAY_BUFFER 0x8893
89 #define FF_GL_STATIC_DRAW 0x88E4
90 #define FF_GL_FRAGMENT_SHADER 0x8B30
91 #define FF_GL_VERTEX_SHADER 0x8B31
92 #define FF_GL_COMPILE_STATUS 0x8B81
93 #define FF_GL_LINK_STATUS 0x8B82
94 #define FF_GL_INFO_LOG_LENGTH 0x8B84
95 typedef void (APIENTRY *FF_PFNGLACTIVETEXTUREPROC) (GLenum texture);
96 typedef void (APIENTRY *FF_PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
97 typedef void (APIENTRY *FF_PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
98 typedef void (APIENTRY *FF_PFNGLBUFFERDATAPROC) (GLenum target, ptrdiff_t size, const GLvoid *data, GLenum usage);
99 typedef void (APIENTRY *FF_PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
100 typedef GLint (APIENTRY *FF_PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const char *name);
101 typedef void (APIENTRY *FF_PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
102 typedef void (APIENTRY *FF_PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, uintptr_t pointer);
103 typedef GLint (APIENTRY *FF_PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const char *name);
104 typedef void (APIENTRY *FF_PFNGLUNIFORM1FPROC) (GLint location, GLfloat v0);
105 typedef void (APIENTRY *FF_PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
106 typedef void (APIENTRY *FF_PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
107 typedef GLuint (APIENTRY *FF_PFNGLCREATEPROGRAMPROC) (void);
108 typedef void (APIENTRY *FF_PFNGLDELETEPROGRAMPROC) (GLuint program);
109 typedef void (APIENTRY *FF_PFNGLUSEPROGRAMPROC) (GLuint program);
110 typedef void (APIENTRY *FF_PFNGLLINKPROGRAMPROC) (GLuint program);
111 typedef void (APIENTRY *FF_PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
112 typedef void (APIENTRY *FF_PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, char *infoLog);
113 typedef void (APIENTRY *FF_PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
114 typedef GLuint (APIENTRY *FF_PFNGLCREATESHADERPROC) (GLenum type);
115 typedef void (APIENTRY *FF_PFNGLDELETESHADERPROC) (GLuint shader);
116 typedef void (APIENTRY *FF_PFNGLCOMPILESHADERPROC) (GLuint shader);
117 typedef void (APIENTRY *FF_PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const char* *string, const GLint *length);
118 typedef void (APIENTRY *FF_PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
119 typedef void (APIENTRY *FF_PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, char *infoLog);
121 typedef struct FFOpenGLFunctions {
122 FF_PFNGLACTIVETEXTUREPROC glActiveTexture; //Require GL ARB multitexture
123 FF_PFNGLGENBUFFERSPROC glGenBuffers; //Require GL_ARB_vertex_buffer_object
124 FF_PFNGLDELETEBUFFERSPROC glDeleteBuffers; //Require GL_ARB_vertex_buffer_object
125 FF_PFNGLBUFFERDATAPROC glBufferData; //Require GL_ARB_vertex_buffer_object
126 FF_PFNGLBINDBUFFERPROC glBindBuffer; //Require GL_ARB_vertex_buffer_object
127 FF_PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation; //Require GL_ARB_vertex_shader
128 FF_PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray; //Require GL_ARB_vertex_shader
129 FF_PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer; //Require GL_ARB_vertex_shader
130 FF_PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation; //Require GL_ARB_shader_objects
131 FF_PFNGLUNIFORM1FPROC glUniform1f; //Require GL_ARB_shader_objects
132 FF_PFNGLUNIFORM1IPROC glUniform1i; //Require GL_ARB_shader_objects
133 FF_PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv; //Require GL_ARB_shader_objects
134 FF_PFNGLCREATEPROGRAMPROC glCreateProgram; //Require GL_ARB_shader_objects
135 FF_PFNGLDELETEPROGRAMPROC glDeleteProgram; //Require GL_ARB_shader_objects
136 FF_PFNGLUSEPROGRAMPROC glUseProgram; //Require GL_ARB_shader_objects
137 FF_PFNGLLINKPROGRAMPROC glLinkProgram; //Require GL_ARB_shader_objects
138 FF_PFNGLGETPROGRAMIVPROC glGetProgramiv; //Require GL_ARB_shader_objects
139 FF_PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog; //Require GL_ARB_shader_objects
140 FF_PFNGLATTACHSHADERPROC glAttachShader; //Require GL_ARB_shader_objects
141 FF_PFNGLCREATESHADERPROC glCreateShader; //Require GL_ARB_shader_objects
142 FF_PFNGLDELETESHADERPROC glDeleteShader; //Require GL_ARB_shader_objects
143 FF_PFNGLCOMPILESHADERPROC glCompileShader; //Require GL_ARB_shader_objects
144 FF_PFNGLSHADERSOURCEPROC glShaderSource; //Require GL_ARB_shader_objects
145 FF_PFNGLGETSHADERIVPROC glGetShaderiv; //Require GL_ARB_shader_objects
146 FF_PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog; //Require GL_ARB_shader_objects
149 #define OPENGL_ERROR_CHECK(ctx) \
152 if ((err_code = glGetError()) != GL_NO_ERROR) { \
153 av_log(ctx, AV_LOG_ERROR, "OpenGL error occurred in '%s', line %d: %d\n", __FUNCTION__, __LINE__, err_code); \
158 typedef struct OpenGLVertexInfo
160 float x, y, z; ///<Position
161 float s0, t0; ///<Texture coords
164 /* defines 2 triangles to display */
165 static GLushort g_index[6] =
171 typedef struct OpenGLContext {
172 AVClass *class; ///< class for private options
175 SDL_Surface *surface;
177 FFOpenGLFunctions glprocs;
179 uint8_t background[4]; ///< Background color
180 int no_window; ///< 0 for create default window
181 char *window_title; ///< Title of the window
183 /* OpenGL implementation limits */
184 GLint max_texture_size; ///< Maximum texture size
185 GLint max_viewport_width; ///< Maximum viewport size
186 GLint max_viewport_height; ///< Maximum viewport size
187 int non_pow_2_textures; ///< 1 when non power of 2 textures are supported
189 /* Current OpenGL configuration */
190 GLuint program; ///< Shader program
191 GLuint texture_name[4]; ///< Textures' IDs
192 GLuint index_buffer; ///< Index buffer
193 GLuint vertex_buffer; ///< Vertex buffer
194 OpenGLVertexInfo vertex[4]; ///< VBO
195 GLint projection_matrix_location; ///< Uniforms' locations
196 GLint model_view_matrix_location;
197 GLint color_map_location;
198 GLint chroma_div_w_location;
199 GLint chroma_div_h_location;
200 GLint texture_location[4];
201 GLint position_attrib; ///< Attibutes' locations
202 GLint texture_coords_attrib;
204 GLfloat projection_matrix[16]; ///< Projection matrix
205 GLfloat model_view_matrix[16]; ///< Modev view matrix
206 GLfloat color_map[16]; ///< RGBA color map matrix
207 GLfloat chroma_div_w; ///< Chroma subsampling w ratio
208 GLfloat chroma_div_h; ///< Chroma subsampling h ratio
210 /* Stream information */
213 int width; ///< Stream width
214 int height; ///< Stream height
215 enum AVPixelFormat pix_fmt; ///< Stream pixel format
216 int picture_width; ///< Rendered width
217 int picture_height; ///< Rendered height
222 static av_cold int opengl_prepare_vertex(AVFormatContext *s);
223 static int opengl_draw(AVFormatContext *h, AVPacket *pkt, int repaint);
224 static av_cold int opengl_init_context(OpenGLContext *opengl);
226 static int opengl_resize(AVFormatContext *h, int width, int height)
229 OpenGLContext *opengl = h->priv_data;
230 opengl->window_width = width;
231 opengl->window_height = height;
232 /* max_viewport_width == 0 means write_header was not called yet. */
233 if (opengl->max_viewport_width) {
234 if (opengl->no_window &&
235 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
236 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
239 if ((ret = opengl_prepare_vertex(h)) < 0)
241 ret = opengl_draw(h, NULL, 1);
247 static int opengl_control_message(AVFormatContext *h, int type, void *data, size_t data_size)
249 OpenGLContext *opengl = h->priv_data;
251 case AV_APP_TO_DEV_WINDOW_SIZE:
253 AVDeviceRect *message = data;
254 return opengl_resize(h, message->width, message->height);
256 return AVERROR(EINVAL);
257 case AV_APP_TO_DEV_WINDOW_REPAINT:
258 return opengl_resize(h, opengl->window_width, opengl->window_height);
260 return AVERROR(ENOSYS);
264 static int opengl_sdl_recreate_window(OpenGLContext *opengl, int width, int height)
266 opengl->surface = SDL_SetVideoMode(width, height,
267 32, SDL_OPENGL | SDL_RESIZABLE);
268 if (!opengl->surface) {
269 av_log(opengl, AV_LOG_ERROR, "Unable to set video mode: %s\n", SDL_GetError());
270 return AVERROR_EXTERNAL;
272 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
273 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
274 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
275 SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
276 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
280 static int opengl_sdl_process_events(AVFormatContext *h)
283 OpenGLContext *opengl = h->priv_data;
286 while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_ALLEVENTS) > 0) {
287 switch (event.type) {
291 switch (event.key.keysym.sym) {
297 case SDL_VIDEORESIZE: {
300 AVDeviceRect message;
301 /* clean up old context because SDL_SetVideoMode may lose its state. */
302 SDL_VideoDriverName(buffer, sizeof(buffer));
303 reinit = !av_strncasecmp(buffer, "quartz", sizeof(buffer));
305 glDeleteTextures(4, opengl->texture_name);
306 opengl->glprocs.glDeleteBuffers(2, &opengl->index_buffer);
308 if ((ret = opengl_sdl_recreate_window(opengl, event.resize.w, event.resize.h)) < 0)
310 if (reinit && (ret = opengl_init_context(opengl)) < 0)
312 message.width = opengl->surface->w;
313 message.height = opengl->surface->h;
314 return opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
321 static int av_cold opengl_sdl_create_window(AVFormatContext *h)
325 OpenGLContext *opengl = h->priv_data;
326 AVDeviceRect message;
327 if (SDL_Init(SDL_INIT_VIDEO)) {
328 av_log(opengl, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError());
329 return AVERROR_EXTERNAL;
331 if ((ret = opengl_sdl_recreate_window(opengl, opengl->width, opengl->height)) < 0)
333 av_log(opengl, AV_LOG_INFO, "SDL driver: '%s'.\n", SDL_VideoDriverName(buffer, sizeof(buffer)));
334 message.width = opengl->surface->w;
335 message.height = opengl->surface->h;
336 opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
340 static int av_cold opengl_sdl_load_procedures(OpenGLContext *opengl)
342 FFOpenGLFunctions *procs = &opengl->glprocs;
344 #define LOAD_OPENGL_FUN(name, type) \
345 procs->name = (type)SDL_GL_GetProcAddress(#name); \
346 if (!procs->name) { \
347 av_log(opengl, AV_LOG_ERROR, "Cannot load OpenGL function: '%s'\n", #name); \
348 return AVERROR(ENOSYS); \
351 LOAD_OPENGL_FUN(glActiveTexture, FF_PFNGLACTIVETEXTUREPROC)
352 LOAD_OPENGL_FUN(glGenBuffers, FF_PFNGLGENBUFFERSPROC)
353 LOAD_OPENGL_FUN(glDeleteBuffers, FF_PFNGLDELETEBUFFERSPROC)
354 LOAD_OPENGL_FUN(glBufferData, FF_PFNGLBUFFERDATAPROC)
355 LOAD_OPENGL_FUN(glBindBuffer, FF_PFNGLBINDBUFFERPROC)
356 LOAD_OPENGL_FUN(glGetAttribLocation, FF_PFNGLGETATTRIBLOCATIONPROC)
357 LOAD_OPENGL_FUN(glGetUniformLocation, FF_PFNGLGETUNIFORMLOCATIONPROC)
358 LOAD_OPENGL_FUN(glUniform1f, FF_PFNGLUNIFORM1FPROC)
359 LOAD_OPENGL_FUN(glUniform1i, FF_PFNGLUNIFORM1IPROC)
360 LOAD_OPENGL_FUN(glUniformMatrix4fv, FF_PFNGLUNIFORMMATRIX4FVPROC)
361 LOAD_OPENGL_FUN(glCreateProgram, FF_PFNGLCREATEPROGRAMPROC)
362 LOAD_OPENGL_FUN(glDeleteProgram, FF_PFNGLDELETEPROGRAMPROC)
363 LOAD_OPENGL_FUN(glUseProgram, FF_PFNGLUSEPROGRAMPROC)
364 LOAD_OPENGL_FUN(glLinkProgram, FF_PFNGLLINKPROGRAMPROC)
365 LOAD_OPENGL_FUN(glGetProgramiv, FF_PFNGLGETPROGRAMIVPROC)
366 LOAD_OPENGL_FUN(glGetProgramInfoLog, FF_PFNGLGETPROGRAMINFOLOGPROC)
367 LOAD_OPENGL_FUN(glAttachShader, FF_PFNGLATTACHSHADERPROC)
368 LOAD_OPENGL_FUN(glCreateShader, FF_PFNGLCREATESHADERPROC)
369 LOAD_OPENGL_FUN(glDeleteShader, FF_PFNGLDELETESHADERPROC)
370 LOAD_OPENGL_FUN(glCompileShader, FF_PFNGLCOMPILESHADERPROC)
371 LOAD_OPENGL_FUN(glShaderSource, FF_PFNGLSHADERSOURCEPROC)
372 LOAD_OPENGL_FUN(glGetShaderiv, FF_PFNGLGETSHADERIVPROC)
373 LOAD_OPENGL_FUN(glGetShaderInfoLog, FF_PFNGLGETSHADERINFOLOGPROC)
374 LOAD_OPENGL_FUN(glEnableVertexAttribArray, FF_PFNGLENABLEVERTEXATTRIBARRAYPROC)
375 LOAD_OPENGL_FUN(glVertexAttribPointer, FF_PFNGLVERTEXATTRIBPOINTERPROC)
379 #undef LOAD_OPENGL_FUN
381 #endif /* HAVE_SDL */
383 #if defined(__APPLE__)
384 static int av_cold opengl_load_procedures(OpenGLContext *opengl)
386 FFOpenGLFunctions *procs = &opengl->glprocs;
388 procs->glActiveTexture = glActiveTexture;
389 procs->glGenBuffers = glGenBuffers;
390 procs->glDeleteBuffers = glDeleteBuffers;
391 procs->glBufferData = glBufferData;
392 procs->glBindBuffer = glBindBuffer;
393 procs->glGetAttribLocation = glGetAttribLocation;
394 procs->glGetUniformLocation = glGetUniformLocation;
395 procs->glUniform1f = glUniform1f;
396 procs->glUniform1i = glUniform1i;
397 procs->glUniformMatrix4fv = glUniformMatrix4fv;
398 procs->glCreateProgram = glCreateProgram;
399 procs->glDeleteProgram = glDeleteProgram;
400 procs->glUseProgram = glUseProgram;
401 procs->glLinkProgram = glLinkProgram;
402 procs->glGetProgramiv = glGetProgramiv;
403 procs->glGetProgramInfoLog = glGetProgramInfoLog;
404 procs->glAttachShader = glAttachShader;
405 procs->glCreateShader = glCreateShader;
406 procs->glDeleteShader = glDeleteShader;
407 procs->glCompileShader = glCompileShader;
408 procs->glShaderSource = glShaderSource;
409 procs->glGetShaderiv = glGetShaderiv;
410 procs->glGetShaderInfoLog = glGetShaderInfoLog;
411 procs->glEnableVertexAttribArray = glEnableVertexAttribArray;
412 procs->glVertexAttribPointer = (FF_PFNGLVERTEXATTRIBPOINTERPROC) glVertexAttribPointer;
416 static int av_cold opengl_load_procedures(OpenGLContext *opengl)
418 FFOpenGLFunctions *procs = &opengl->glprocs;
420 #if HAVE_GLXGETPROCADDRESS
421 #define SelectedGetProcAddress glXGetProcAddress
422 #elif HAVE_WGLGETPROCADDRESS
423 #define SelectedGetProcAddress wglGetProcAddress
426 #define LOAD_OPENGL_FUN(name, type) \
427 procs->name = (type)SelectedGetProcAddress(#name); \
428 if (!procs->name) { \
429 av_log(opengl, AV_LOG_ERROR, "Cannot load OpenGL function: '%s'\n", #name); \
430 return AVERROR(ENOSYS); \
433 LOAD_OPENGL_FUN(glActiveTexture, FF_PFNGLACTIVETEXTUREPROC)
434 LOAD_OPENGL_FUN(glGenBuffers, FF_PFNGLGENBUFFERSPROC)
435 LOAD_OPENGL_FUN(glDeleteBuffers, FF_PFNGLDELETEBUFFERSPROC)
436 LOAD_OPENGL_FUN(glBufferData, FF_PFNGLBUFFERDATAPROC)
437 LOAD_OPENGL_FUN(glBindBuffer, FF_PFNGLBINDBUFFERPROC)
438 LOAD_OPENGL_FUN(glGetAttribLocation, FF_PFNGLGETATTRIBLOCATIONPROC)
439 LOAD_OPENGL_FUN(glGetUniformLocation, FF_PFNGLGETUNIFORMLOCATIONPROC)
440 LOAD_OPENGL_FUN(glUniform1f, FF_PFNGLUNIFORM1FPROC)
441 LOAD_OPENGL_FUN(glUniform1i, FF_PFNGLUNIFORM1IPROC)
442 LOAD_OPENGL_FUN(glUniformMatrix4fv, FF_PFNGLUNIFORMMATRIX4FVPROC)
443 LOAD_OPENGL_FUN(glCreateProgram, FF_PFNGLCREATEPROGRAMPROC)
444 LOAD_OPENGL_FUN(glDeleteProgram, FF_PFNGLDELETEPROGRAMPROC)
445 LOAD_OPENGL_FUN(glUseProgram, FF_PFNGLUSEPROGRAMPROC)
446 LOAD_OPENGL_FUN(glLinkProgram, FF_PFNGLLINKPROGRAMPROC)
447 LOAD_OPENGL_FUN(glGetProgramiv, FF_PFNGLGETPROGRAMIVPROC)
448 LOAD_OPENGL_FUN(glGetProgramInfoLog, FF_PFNGLGETPROGRAMINFOLOGPROC)
449 LOAD_OPENGL_FUN(glAttachShader, FF_PFNGLATTACHSHADERPROC)
450 LOAD_OPENGL_FUN(glCreateShader, FF_PFNGLCREATESHADERPROC)
451 LOAD_OPENGL_FUN(glDeleteShader, FF_PFNGLDELETESHADERPROC)
452 LOAD_OPENGL_FUN(glCompileShader, FF_PFNGLCOMPILESHADERPROC)
453 LOAD_OPENGL_FUN(glShaderSource, FF_PFNGLSHADERSOURCEPROC)
454 LOAD_OPENGL_FUN(glGetShaderiv, FF_PFNGLGETSHADERIVPROC)
455 LOAD_OPENGL_FUN(glGetShaderInfoLog, FF_PFNGLGETSHADERINFOLOGPROC)
456 LOAD_OPENGL_FUN(glEnableVertexAttribArray, FF_PFNGLENABLEVERTEXATTRIBARRAYPROC)
457 LOAD_OPENGL_FUN(glVertexAttribPointer, FF_PFNGLVERTEXATTRIBPOINTERPROC)
461 #undef SelectedGetProcAddress
462 #undef LOAD_OPENGL_FUN
466 static av_always_inline void opengl_make_identity(float matrix[16])
468 memset(matrix, 0, 16 * sizeof(float));
469 matrix[0] = matrix[5] = matrix[10] = matrix[15] = 1.0f;
472 static av_always_inline void opengl_make_ortho(float matrix[16],
473 float left, float right,
474 float bottom, float top,
475 float nearZ, float farZ)
477 float ral = right + left;
478 float rsl = right - left;
479 float tab = top + bottom;
480 float tsb = top - bottom;
481 float fan = farZ + nearZ;
482 float fsn = farZ - nearZ;
484 memset(matrix, 0, 16 * sizeof(float));
485 matrix[0] = 2.0f / rsl;
486 matrix[5] = 2.0f / tsb;
487 matrix[10] = -2.0f / fsn;
488 matrix[12] = -ral / rsl;
489 matrix[13] = -tab / tsb;
490 matrix[14] = -fan / fsn;
494 static av_cold int opengl_read_limits(OpenGLContext *opengl)
497 const char *extention;
500 } required_extensions[] = {
501 { "GL_ARB_multitexture", 1, 3 },
502 { "GL_ARB_vertex_buffer_object", 1, 5 }, //GLX_ARB_vertex_buffer_object
503 { "GL_ARB_vertex_shader", 2, 0 },
504 { "GL_ARB_fragment_shader", 2, 0 },
505 { "GL_ARB_shader_objects", 2, 0 },
509 const char *extensions, *version;
511 version = glGetString(GL_VERSION);
512 extensions = glGetString(GL_EXTENSIONS);
514 av_log(opengl, AV_LOG_DEBUG, "OpenGL version: %s\n", version);
515 sscanf(version, "%d.%d", &major, &minor);
517 for (i = 0; required_extensions[i].extention; i++) {
518 if (major < required_extensions[i].major &&
519 (major == required_extensions[i].major && minor < required_extensions[i].minor) &&
520 !strstr(extensions, required_extensions[i].extention)) {
521 av_log(opengl, AV_LOG_ERROR, "Required extension %s is not supported.\n",
522 required_extensions[i].extention);
523 av_log(opengl, AV_LOG_DEBUG, "Supported extensions are: %s\n", extensions);
524 return AVERROR(ENOSYS);
527 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &opengl->max_texture_size);
528 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, &opengl->max_viewport_width);
529 opengl->non_pow_2_textures = major >= 2 || strstr(extensions, "GL_ARB_texture_non_power_of_two");
531 av_log(opengl, AV_LOG_DEBUG, "Non Power of 2 textures support: %s\n", opengl->non_pow_2_textures ? "Yes" : "No");
532 av_log(opengl, AV_LOG_DEBUG, "Max texture size: %dx%d\n", opengl->max_texture_size, opengl->max_texture_size);
533 av_log(opengl, AV_LOG_DEBUG, "Max viewport size: %dx%d\n",
534 opengl->max_viewport_width, opengl->max_viewport_height);
536 OPENGL_ERROR_CHECK(opengl);
539 return AVERROR_EXTERNAL;
542 static av_always_inline const char * opengl_get_fragment_shader_code(enum AVPixelFormat format)
545 case AV_PIX_FMT_YUV420P: case AV_PIX_FMT_YUV444P:
546 case AV_PIX_FMT_YUV422P: case AV_PIX_FMT_YUV410P:
547 case AV_PIX_FMT_YUV411P: case AV_PIX_FMT_YUV440P:
548 case AV_PIX_FMT_YUV420P16: case AV_PIX_FMT_YUV422P16:
549 case AV_PIX_FMT_YUV444P16:
550 return FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR;
551 case AV_PIX_FMT_YUVA420P: case AV_PIX_FMT_YUVA444P:
552 case AV_PIX_FMT_YUVA422P:
553 case AV_PIX_FMT_YUVA420P16: case AV_PIX_FMT_YUVA422P16:
554 case AV_PIX_FMT_YUVA444P16:
555 return FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR;
556 case AV_PIX_FMT_RGB24: case AV_PIX_FMT_BGR24:
557 case AV_PIX_FMT_0RGB: case AV_PIX_FMT_RGB0:
558 case AV_PIX_FMT_0BGR: case AV_PIX_FMT_BGR0:
559 case AV_PIX_FMT_RGB565: case AV_PIX_FMT_BGR565:
560 case AV_PIX_FMT_RGB555: case AV_PIX_FMT_BGR555:
561 case AV_PIX_FMT_RGB8: case AV_PIX_FMT_BGR8:
562 case AV_PIX_FMT_RGB48:
563 return FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET;
564 case AV_PIX_FMT_ARGB: case AV_PIX_FMT_RGBA:
565 case AV_PIX_FMT_ABGR: case AV_PIX_FMT_BGRA:
566 case AV_PIX_FMT_RGBA64: case AV_PIX_FMT_BGRA64:
567 return FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET;
568 case AV_PIX_FMT_GBRP: case AV_PIX_FMT_GBRP16:
569 return FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR;
570 case AV_PIX_FMT_GBRAP: case AV_PIX_FMT_GBRAP16:
571 return FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR;
578 static av_always_inline int opengl_type_size(GLenum type)
581 case GL_UNSIGNED_SHORT:
582 case FF_GL_UNSIGNED_SHORT_1_5_5_5_REV:
583 case GL_UNSIGNED_SHORT_5_6_5:
585 case GL_UNSIGNED_BYTE:
586 case FF_GL_UNSIGNED_BYTE_3_3_2:
587 case FF_GL_UNSIGNED_BYTE_2_3_3_REV:
594 static av_cold void opengl_get_texture_params(OpenGLContext *opengl)
596 switch(opengl->pix_fmt) {
597 case AV_PIX_FMT_YUV420P: case AV_PIX_FMT_YUV444P:
598 case AV_PIX_FMT_YUV422P: case AV_PIX_FMT_YUV410P:
599 case AV_PIX_FMT_YUV411P: case AV_PIX_FMT_YUV440P:
600 case AV_PIX_FMT_YUVA420P: case AV_PIX_FMT_YUVA444P:
601 case AV_PIX_FMT_YUVA422P:
602 case AV_PIX_FMT_GBRP: case AV_PIX_FMT_GBRAP:
603 opengl->format = GL_RED_COMPONENT;
604 opengl->type = GL_UNSIGNED_BYTE;
606 case AV_PIX_FMT_YUV420P16: case AV_PIX_FMT_YUV422P16:
607 case AV_PIX_FMT_YUV444P16:
608 case AV_PIX_FMT_YUVA420P16: case AV_PIX_FMT_YUVA422P16:
609 case AV_PIX_FMT_YUVA444P16:
610 case AV_PIX_FMT_GBRP16: case AV_PIX_FMT_GBRAP16:
611 opengl->format = GL_RED_COMPONENT;
612 opengl->type = GL_UNSIGNED_SHORT;
614 case AV_PIX_FMT_RGB24: case AV_PIX_FMT_BGR24:
615 opengl->format = GL_RGB;
616 opengl->type = GL_UNSIGNED_BYTE;
618 case AV_PIX_FMT_ARGB: case AV_PIX_FMT_RGBA:
619 case AV_PIX_FMT_ABGR: case AV_PIX_FMT_BGRA:
620 case AV_PIX_FMT_0RGB: case AV_PIX_FMT_RGB0:
621 case AV_PIX_FMT_0BGR: case AV_PIX_FMT_BGR0:
622 opengl->format = GL_RGBA;
623 opengl->type = GL_UNSIGNED_BYTE;
625 case AV_PIX_FMT_RGB8:
626 opengl->format = GL_RGB;
627 opengl->type = FF_GL_UNSIGNED_BYTE_3_3_2;
629 case AV_PIX_FMT_BGR8:
630 opengl->format = GL_RGB;
631 opengl->type = FF_GL_UNSIGNED_BYTE_2_3_3_REV;
633 case AV_PIX_FMT_RGB555: case AV_PIX_FMT_BGR555:
634 opengl->format = GL_RGBA;
635 opengl->type = FF_GL_UNSIGNED_SHORT_1_5_5_5_REV;
637 case AV_PIX_FMT_RGB565: case AV_PIX_FMT_BGR565:
638 opengl->format = GL_RGB;
639 opengl->type = GL_UNSIGNED_SHORT_5_6_5;
641 case AV_PIX_FMT_RGB48:
642 opengl->format = GL_RGB;
643 opengl->type = GL_UNSIGNED_SHORT;
645 case AV_PIX_FMT_RGBA64: case AV_PIX_FMT_BGRA64:
646 opengl->format = GL_RGBA;
647 opengl->type = GL_UNSIGNED_SHORT;
652 static void opengl_compute_display_area(AVFormatContext *s)
654 AVRational sar, dar; /* sample and display aspect ratios */
655 OpenGLContext *opengl = s->priv_data;
656 AVStream *st = s->streams[0];
657 AVCodecContext *encctx = st->codec;
659 /* compute overlay width and height from the codec context information */
660 sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 };
661 dar = av_mul_q(sar, (AVRational){ encctx->width, encctx->height });
663 /* we suppose the screen has a 1/1 sample aspect ratio */
664 /* fit in the window */
665 if (av_cmp_q(dar, (AVRational){ opengl->window_width, opengl->window_height }) > 0) {
667 opengl->picture_width = opengl->window_width;
668 opengl->picture_height = av_rescale(opengl->picture_width, dar.den, dar.num);
671 opengl->picture_height = opengl->window_height;
672 opengl->picture_width = av_rescale(opengl->picture_height, dar.num, dar.den);
676 static av_cold void opengl_get_texture_size(OpenGLContext *opengl, int in_width, int in_height,
677 int *out_width, int *out_height)
679 if (opengl->non_pow_2_textures) {
680 *out_width = in_width;
681 *out_height = in_height;
683 int max = FFMIN(FFMAX(in_width, in_height), opengl->max_texture_size);
684 unsigned power_of_2 = 1;
685 while (power_of_2 < max)
687 *out_height = power_of_2;
688 *out_width = power_of_2;
689 av_log(opengl, AV_LOG_DEBUG, "Texture size calculated from %dx%d into %dx%d\n",
690 in_width, in_height, *out_width, *out_height);
694 static av_cold void opengl_fill_color_map(OpenGLContext *opengl)
696 const AVPixFmtDescriptor *desc;
698 enum AVPixelFormat pix_fmt = opengl->pix_fmt;
700 /* We need order of components, not exact position, some minor HACKs here */
701 if (pix_fmt == AV_PIX_FMT_RGB565 || pix_fmt == AV_PIX_FMT_BGR555 ||
702 pix_fmt == AV_PIX_FMT_BGR8 || pix_fmt == AV_PIX_FMT_RGB8)
703 pix_fmt = AV_PIX_FMT_RGB24;
704 else if (pix_fmt == AV_PIX_FMT_BGR565 || pix_fmt == AV_PIX_FMT_RGB555)
705 pix_fmt = AV_PIX_FMT_BGR24;
707 desc = av_pix_fmt_desc_get(pix_fmt);
708 if (!(desc->flags & AV_PIX_FMT_FLAG_RGB))
711 #define FILL_COMPONENT(i) { \
712 shift = desc->comp[i].depth_minus1 >> 3; \
713 opengl->color_map[(i << 2) + ((desc->comp[i].offset_plus1 - 1) >> shift)] = 1.0; \
716 memset(opengl->color_map, 0, sizeof(opengl->color_map));
720 if (desc->flags & AV_PIX_FMT_FLAG_ALPHA)
723 #undef FILL_COMPONENT
726 static av_cold GLuint opengl_load_shader(OpenGLContext *opengl, GLenum type, const char *source)
728 GLuint shader = opengl->glprocs.glCreateShader(type);
731 av_log(opengl, AV_LOG_ERROR, "glCreateShader() failed\n");
734 opengl->glprocs.glShaderSource(shader, 1, &source, NULL);
735 opengl->glprocs.glCompileShader(shader);
737 opengl->glprocs.glGetShaderiv(shader, FF_GL_COMPILE_STATUS, &result);
740 opengl->glprocs.glGetShaderiv(shader, FF_GL_INFO_LOG_LENGTH, &result);
742 if ((log = av_malloc(result))) {
743 opengl->glprocs.glGetShaderInfoLog(shader, result, NULL, log);
744 av_log(opengl, AV_LOG_ERROR, "Compile error: %s\n", log);
750 OPENGL_ERROR_CHECK(opengl);
753 opengl->glprocs.glDeleteShader(shader);
757 static av_cold int opengl_compile_shaders(OpenGLContext *opengl, enum AVPixelFormat pix_fmt)
759 GLuint vertex_shader = 0, fragment_shader = 0;
761 const char *fragment_shader_code = opengl_get_fragment_shader_code(pix_fmt);
763 if (!fragment_shader_code) {
764 av_log(opengl, AV_LOG_ERROR, "Provided pixel format '%s' is not supported\n",
765 av_get_pix_fmt_name(pix_fmt));
766 return AVERROR(EINVAL);
769 vertex_shader = opengl_load_shader(opengl, FF_GL_VERTEX_SHADER,
770 FF_OPENGL_VERTEX_SHADER);
771 if (!vertex_shader) {
772 av_log(opengl, AV_LOG_ERROR, "Vertex shader loading failed.\n");
775 fragment_shader = opengl_load_shader(opengl, FF_GL_FRAGMENT_SHADER,
776 fragment_shader_code);
777 if (!fragment_shader) {
778 av_log(opengl, AV_LOG_ERROR, "Fragment shader loading failed.\n");
782 opengl->program = opengl->glprocs.glCreateProgram();
783 if (!opengl->program)
786 opengl->glprocs.glAttachShader(opengl->program, vertex_shader);
787 opengl->glprocs.glAttachShader(opengl->program, fragment_shader);
788 opengl->glprocs.glLinkProgram(opengl->program);
790 opengl->glprocs.glGetProgramiv(opengl->program, FF_GL_LINK_STATUS, &result);
793 opengl->glprocs.glGetProgramiv(opengl->program, FF_GL_INFO_LOG_LENGTH, &result);
795 log = av_malloc(result);
798 opengl->glprocs.glGetProgramInfoLog(opengl->program, result, NULL, log);
799 av_log(opengl, AV_LOG_ERROR, "Link error: %s\n", log);
805 opengl->position_attrib = opengl->glprocs.glGetAttribLocation(opengl->program, "a_position");
806 opengl->texture_coords_attrib = opengl->glprocs.glGetAttribLocation(opengl->program, "a_textureCoords");
807 opengl->projection_matrix_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_projectionMatrix");
808 opengl->model_view_matrix_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_modelViewMatrix");
809 opengl->color_map_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_colorMap");
810 opengl->texture_location[0] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture0");
811 opengl->texture_location[1] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture1");
812 opengl->texture_location[2] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture2");
813 opengl->texture_location[3] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture3");
814 opengl->chroma_div_w_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_chroma_div_w");
815 opengl->chroma_div_h_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_chroma_div_h");
817 OPENGL_ERROR_CHECK(opengl);
820 opengl->glprocs.glDeleteShader(vertex_shader);
821 opengl->glprocs.glDeleteShader(fragment_shader);
822 opengl->glprocs.glDeleteProgram(opengl->program);
824 return AVERROR_EXTERNAL;
827 static av_cold int opengl_configure_texture(OpenGLContext *opengl, GLuint texture,
828 GLsizei width, GLsizei height)
831 int new_width, new_height;
832 opengl_get_texture_size(opengl, width, height, &new_width, &new_height);
833 glBindTexture(GL_TEXTURE_2D, texture);
834 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
835 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
836 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
837 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
838 glTexImage2D(GL_TEXTURE_2D, 0, opengl->format, new_width, new_height, 0,
839 opengl->format, opengl->type, NULL);
840 OPENGL_ERROR_CHECK(NULL);
844 return AVERROR_EXTERNAL;
847 static av_cold int opengl_prepare_vertex(AVFormatContext *s)
849 OpenGLContext *opengl = s->priv_data;
852 if (opengl->window_width > opengl->max_viewport_width || opengl->window_height > opengl->max_viewport_height) {
853 opengl->window_width = FFMAX(opengl->window_width, opengl->max_viewport_width);
854 opengl->window_height = FFMAX(opengl->window_height, opengl->max_viewport_height);
855 av_log(opengl, AV_LOG_WARNING, "Too big viewport requested, limited to %dx%d", opengl->window_width, opengl->window_height);
857 glViewport(0, 0, opengl->window_width, opengl->window_height);
858 opengl_make_ortho(opengl->projection_matrix,
859 - (float)opengl->window_width / 2.0f, (float)opengl->window_width / 2.0f,
860 - (float)opengl->window_height / 2.0f, (float)opengl->window_height / 2.0f,
862 opengl_make_identity(opengl->model_view_matrix);
864 opengl_compute_display_area(s);
866 opengl->vertex[0].z = opengl->vertex[1].z = opengl->vertex[2].z = opengl->vertex[3].z = 0.0f;
867 opengl->vertex[0].x = opengl->vertex[1].x = - (float)opengl->picture_width / 2.0f;
868 opengl->vertex[2].x = opengl->vertex[3].x = (float)opengl->picture_width / 2.0f;
869 opengl->vertex[1].y = opengl->vertex[2].y = - (float)opengl->picture_height / 2.0f;
870 opengl->vertex[0].y = opengl->vertex[3].y = (float)opengl->picture_height / 2.0f;
872 opengl_get_texture_size(opengl, opengl->width, opengl->height, &tex_w, &tex_h);
874 opengl->vertex[0].s0 = 0.0f;
875 opengl->vertex[0].t0 = 0.0f;
876 opengl->vertex[1].s0 = 0.0f;
877 opengl->vertex[1].t0 = (float)opengl->height / (float)tex_h;
878 opengl->vertex[2].s0 = (float)opengl->width / (float)tex_w;
879 opengl->vertex[2].t0 = (float)opengl->height / (float)tex_h;
880 opengl->vertex[3].s0 = (float)opengl->width / (float)tex_w;
881 opengl->vertex[3].t0 = 0.0f;
883 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, opengl->vertex_buffer);
884 opengl->glprocs.glBufferData(FF_GL_ARRAY_BUFFER, sizeof(opengl->vertex), opengl->vertex, FF_GL_STATIC_DRAW);
885 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, 0);
886 OPENGL_ERROR_CHECK(opengl);
889 return AVERROR_EXTERNAL;
892 static int opengl_prepare(OpenGLContext *opengl)
895 opengl->glprocs.glUseProgram(opengl->program);
896 opengl->glprocs.glUniformMatrix4fv(opengl->projection_matrix_location, 1, GL_FALSE, opengl->projection_matrix);
897 opengl->glprocs.glUniformMatrix4fv(opengl->model_view_matrix_location, 1, GL_FALSE, opengl->model_view_matrix);
898 for (i = 0; i < 4; i++)
899 if (opengl->texture_location[i] != -1) {
900 opengl->glprocs.glActiveTexture(GL_TEXTURE0 + i);
901 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[i]);
902 opengl->glprocs.glUniform1i(opengl->texture_location[i], i);
904 if (opengl->color_map_location != -1)
905 opengl->glprocs.glUniformMatrix4fv(opengl->color_map_location, 1, GL_FALSE, opengl->color_map);
906 if (opengl->chroma_div_h_location != -1)
907 opengl->glprocs.glUniform1f(opengl->chroma_div_h_location, opengl->chroma_div_h);
908 if (opengl->chroma_div_w_location != -1)
909 opengl->glprocs.glUniform1f(opengl->chroma_div_w_location, opengl->chroma_div_w);
911 OPENGL_ERROR_CHECK(opengl);
914 return AVERROR_EXTERNAL;
917 static av_cold int opengl_write_trailer(AVFormatContext *h)
919 OpenGLContext *opengl = h->priv_data;
921 if (opengl->no_window &&
922 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0) < 0)
923 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
925 glDeleteTextures(4, opengl->texture_name);
926 if (opengl && opengl->glprocs.glDeleteBuffers)
927 opengl->glprocs.glDeleteBuffers(2, &opengl->index_buffer);
930 if (!opengl->no_window)
933 if (opengl->no_window &&
934 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER, NULL , 0) < 0)
935 av_log(opengl, AV_LOG_ERROR, "Application failed to release window buffer.\n");
940 static av_cold int opengl_init_context(OpenGLContext *opengl)
943 const AVPixFmtDescriptor *desc;
945 if ((ret = opengl_compile_shaders(opengl, opengl->pix_fmt)) < 0)
948 desc = av_pix_fmt_desc_get(opengl->pix_fmt);
949 av_assert0(desc->nb_components > 0 && desc->nb_components <= 4);
950 glGenTextures(desc->nb_components, opengl->texture_name);
952 opengl->glprocs.glGenBuffers(2, &opengl->index_buffer);
953 if (!opengl->index_buffer || !opengl->vertex_buffer) {
954 av_log(opengl, AV_LOG_ERROR, "Buffer generation failed.\n");
955 ret = AVERROR_EXTERNAL;
959 opengl_configure_texture(opengl, opengl->texture_name[0], opengl->width, opengl->height);
960 if (desc->nb_components > 1) {
961 int has_alpha = desc->flags & AV_PIX_FMT_FLAG_ALPHA;
962 int num_planes = desc->nb_components - (has_alpha ? 1 : 0);
963 if (opengl->non_pow_2_textures) {
964 opengl->chroma_div_w = 1.0f;
965 opengl->chroma_div_h = 1.0f;
967 opengl->chroma_div_w = 1 << desc->log2_chroma_w;
968 opengl->chroma_div_h = 1 << desc->log2_chroma_h;
970 for (i = 1; i < num_planes; i++)
971 if (opengl->non_pow_2_textures)
972 opengl_configure_texture(opengl, opengl->texture_name[i],
973 FF_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w),
974 FF_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h));
976 opengl_configure_texture(opengl, opengl->texture_name[i], opengl->width, opengl->height);
978 opengl_configure_texture(opengl, opengl->texture_name[3], opengl->width, opengl->height);
981 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, opengl->index_buffer);
982 opengl->glprocs.glBufferData(FF_GL_ELEMENT_ARRAY_BUFFER, sizeof(g_index), g_index, FF_GL_STATIC_DRAW);
983 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, 0);
986 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
988 glClearColor((float)opengl->background[0] / 255.0f, (float)opengl->background[1] / 255.0f,
989 (float)opengl->background[2] / 255.0f, 1.0f);
991 ret = AVERROR_EXTERNAL;
992 OPENGL_ERROR_CHECK(opengl);
999 static av_cold int opengl_write_header(AVFormatContext *h)
1001 OpenGLContext *opengl = h->priv_data;
1005 if (h->nb_streams != 1 ||
1006 h->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
1007 h->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
1008 av_log(opengl, AV_LOG_ERROR, "Only a single video stream is supported.\n");
1009 return AVERROR(EINVAL);
1012 opengl->width = st->codec->width;
1013 opengl->height = st->codec->height;
1014 opengl->pix_fmt = st->codec->pix_fmt;
1016 if (!opengl->window_title && !opengl->no_window)
1017 opengl->window_title = av_strdup(h->filename);
1019 if (!opengl->no_window) {
1021 if ((ret = opengl_sdl_create_window(h)) < 0)
1024 av_log(opengl, AV_LOG_ERROR, "FFmpeg is compiled without SDL. Cannot create default window.\n");
1025 ret = AVERROR(ENOSYS);
1029 if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_CREATE_WINDOW_BUFFER, NULL , 0)) < 0) {
1030 av_log(opengl, AV_LOG_ERROR, "Application failed to create window buffer.\n");
1033 if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
1034 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
1039 if ((ret = opengl_read_limits(opengl)) < 0)
1042 if (opengl->width > opengl->max_texture_size || opengl->height > opengl->max_texture_size) {
1043 av_log(opengl, AV_LOG_ERROR, "Too big picture %dx%d, max supported size is %dx%d\n",
1044 opengl->width, opengl->height, opengl->max_texture_size, opengl->max_texture_size);
1045 ret = AVERROR(EINVAL);
1049 if (!opengl->no_window) {
1051 if ((ret = opengl_sdl_load_procedures(opengl)) < 0)
1054 } else if ((ret = opengl_load_procedures(opengl)) < 0)
1057 opengl_fill_color_map(opengl);
1058 opengl_get_texture_params(opengl);
1060 if ((ret = opengl_init_context(opengl)) < 0)
1063 if ((ret = opengl_prepare_vertex(h)) < 0)
1066 glClear(GL_COLOR_BUFFER_BIT);
1069 if (!opengl->no_window)
1070 SDL_GL_SwapBuffers();
1072 if (opengl->no_window &&
1073 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
1074 av_log(opengl, AV_LOG_ERROR, "Application failed to display window buffer.\n");
1078 ret = AVERROR_EXTERNAL;
1079 OPENGL_ERROR_CHECK(opengl);
1083 opengl_write_trailer(h);
1087 static uint8_t* opengl_get_plane_pointer(OpenGLContext *opengl, AVPacket *pkt, int comp_index,
1088 const AVPixFmtDescriptor *desc)
1090 uint8_t *data = pkt->data;
1091 int wordsize = opengl_type_size(opengl->type);
1092 int width_chroma = FF_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w);
1093 int height_chroma = FF_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h);
1094 int plane = desc->comp[comp_index].plane;
1100 data += opengl->width * opengl->height * wordsize;
1103 data += opengl->width * opengl->height * wordsize;
1104 data += width_chroma * height_chroma * wordsize;
1107 data += opengl->width * opengl->height * wordsize;
1108 data += 2 * width_chroma * height_chroma * wordsize;
1116 static int opengl_draw(AVFormatContext *h, AVPacket *pkt, int repaint)
1118 OpenGLContext *opengl = h->priv_data;
1119 enum AVPixelFormat pix_fmt = h->streams[0]->codec->pix_fmt;
1120 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
1124 if (!opengl->no_window && (ret = opengl_sdl_process_events(h)) < 0)
1127 if (opengl->no_window &&
1128 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
1129 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
1133 glClear(GL_COLOR_BUFFER_BIT);
1136 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[0]);
1137 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, opengl->width, opengl->height, opengl->format, opengl->type,
1138 opengl_get_plane_pointer(opengl, pkt, 0, desc));
1139 if (desc->flags & AV_PIX_FMT_FLAG_PLANAR) {
1140 int width_chroma = FF_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w);
1141 int height_chroma = FF_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h);
1142 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[1]);
1143 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_chroma, height_chroma, opengl->format, opengl->type,
1144 opengl_get_plane_pointer(opengl, pkt, 1, desc));
1145 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[2]);
1146 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_chroma, height_chroma, opengl->format, opengl->type,
1147 opengl_get_plane_pointer(opengl, pkt, 2, desc));
1148 if (desc->flags & AV_PIX_FMT_FLAG_ALPHA) {
1149 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[3]);
1150 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, opengl->width, opengl->height, opengl->format, opengl->type,
1151 opengl_get_plane_pointer(opengl, pkt, 3, desc));
1155 ret = AVERROR_EXTERNAL;
1156 OPENGL_ERROR_CHECK(opengl);
1158 if ((ret = opengl_prepare(opengl)) < 0)
1161 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, opengl->vertex_buffer);
1162 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, opengl->index_buffer);
1163 opengl->glprocs.glVertexAttribPointer(opengl->position_attrib, 3, GL_FLOAT, GL_FALSE, sizeof(OpenGLVertexInfo), 0);
1164 opengl->glprocs.glEnableVertexAttribArray(opengl->position_attrib);
1165 opengl->glprocs.glVertexAttribPointer(opengl->texture_coords_attrib, 2, GL_FLOAT, GL_FALSE, sizeof(OpenGLVertexInfo), 12);
1166 opengl->glprocs.glEnableVertexAttribArray(opengl->texture_coords_attrib);
1168 glDrawElements(GL_TRIANGLES, FF_ARRAY_ELEMS(g_index), GL_UNSIGNED_SHORT, 0);
1170 ret = AVERROR_EXTERNAL;
1171 OPENGL_ERROR_CHECK(opengl);
1174 if (!opengl->no_window)
1175 SDL_GL_SwapBuffers();
1177 if (opengl->no_window &&
1178 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
1179 av_log(opengl, AV_LOG_ERROR, "Application failed to display window buffer.\n");
1188 static int opengl_write_packet(AVFormatContext *h, AVPacket *pkt)
1190 return opengl_draw(h, pkt, 0);
1193 #define OFFSET(x) offsetof(OpenGLContext, x)
1194 #define ENC AV_OPT_FLAG_ENCODING_PARAM
1195 static const AVOption options[] = {
1196 { "background", "set background color", OFFSET(background), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, ENC },
1197 { "no_window", "disable default window", OFFSET(no_window), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
1198 { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, ENC },
1202 static const AVClass opengl_class = {
1203 .class_name = "opengl outdev",
1204 .item_name = av_default_item_name,
1206 .version = LIBAVUTIL_VERSION_INT,
1209 AVOutputFormat ff_opengl_muxer = {
1211 .long_name = NULL_IF_CONFIG_SMALL("OpenGL output"),
1212 .priv_data_size = sizeof(OpenGLContext),
1213 .audio_codec = AV_CODEC_ID_NONE,
1214 .video_codec = AV_CODEC_ID_RAWVIDEO,
1215 .write_header = opengl_write_header,
1216 .write_packet = opengl_write_packet,
1217 .write_trailer = opengl_write_trailer,
1218 .control_message = opengl_control_message,
1219 .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
1220 .priv_class = &opengl_class,