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 "libavformat/internal.h"
60 #include "libavdevice/avdevice.h"
61 #include "opengl_enc_shaders.h"
67 /* FF_GL_RED_COMPONENT is used for plannar pixel types.
68 * Only red component is sampled in shaders.
69 * On some platforms GL_RED is not availabe and GL_LUMINANCE have to be used,
70 * but since OpenGL 3.0 GL_LUMINANCE is deprecated.
71 * GL_RED produces RGBA = value, 0, 0, 1.
72 * GL_LUMINANCE produces RGBA = value, value, value, 1.
73 * Note: GL_INTENSITY may also be used which produce RGBA = value, value, value, value. */
75 #define FF_GL_RED_COMPONENT GL_RED
76 #elif defined(GL_LUMINANCE)
77 #define FF_GL_RED_COMPONENT GL_LUMINANCE
79 #define FF_GL_RED_COMPONENT 0x1903; //GL_RED
82 /* Constants not defined for iOS */
83 #define FF_GL_UNSIGNED_BYTE_3_3_2 0x8032
84 #define FF_GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
85 #define FF_GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
86 #define FF_GL_UNPACK_ROW_LENGTH 0x0CF2
88 /* MinGW exposes only OpenGL 1.1 API */
89 #define FF_GL_ARRAY_BUFFER 0x8892
90 #define FF_GL_ELEMENT_ARRAY_BUFFER 0x8893
91 #define FF_GL_STATIC_DRAW 0x88E4
92 #define FF_GL_FRAGMENT_SHADER 0x8B30
93 #define FF_GL_VERTEX_SHADER 0x8B31
94 #define FF_GL_COMPILE_STATUS 0x8B81
95 #define FF_GL_LINK_STATUS 0x8B82
96 #define FF_GL_INFO_LOG_LENGTH 0x8B84
97 typedef void (APIENTRY *FF_PFNGLACTIVETEXTUREPROC) (GLenum texture);
98 typedef void (APIENTRY *FF_PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
99 typedef void (APIENTRY *FF_PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
100 typedef void (APIENTRY *FF_PFNGLBUFFERDATAPROC) (GLenum target, ptrdiff_t size, const GLvoid *data, GLenum usage);
101 typedef void (APIENTRY *FF_PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
102 typedef GLint (APIENTRY *FF_PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const char *name);
103 typedef void (APIENTRY *FF_PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
104 typedef void (APIENTRY *FF_PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, uintptr_t pointer);
105 typedef GLint (APIENTRY *FF_PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const char *name);
106 typedef void (APIENTRY *FF_PFNGLUNIFORM1FPROC) (GLint location, GLfloat v0);
107 typedef void (APIENTRY *FF_PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
108 typedef void (APIENTRY *FF_PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
109 typedef GLuint (APIENTRY *FF_PFNGLCREATEPROGRAMPROC) (void);
110 typedef void (APIENTRY *FF_PFNGLDELETEPROGRAMPROC) (GLuint program);
111 typedef void (APIENTRY *FF_PFNGLUSEPROGRAMPROC) (GLuint program);
112 typedef void (APIENTRY *FF_PFNGLLINKPROGRAMPROC) (GLuint program);
113 typedef void (APIENTRY *FF_PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
114 typedef void (APIENTRY *FF_PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, char *infoLog);
115 typedef void (APIENTRY *FF_PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
116 typedef GLuint (APIENTRY *FF_PFNGLCREATESHADERPROC) (GLenum type);
117 typedef void (APIENTRY *FF_PFNGLDELETESHADERPROC) (GLuint shader);
118 typedef void (APIENTRY *FF_PFNGLCOMPILESHADERPROC) (GLuint shader);
119 typedef void (APIENTRY *FF_PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const char* *string, const GLint *length);
120 typedef void (APIENTRY *FF_PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
121 typedef void (APIENTRY *FF_PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, char *infoLog);
123 typedef struct FFOpenGLFunctions {
124 FF_PFNGLACTIVETEXTUREPROC glActiveTexture; //Require GL ARB multitexture
125 FF_PFNGLGENBUFFERSPROC glGenBuffers; //Require GL_ARB_vertex_buffer_object
126 FF_PFNGLDELETEBUFFERSPROC glDeleteBuffers; //Require GL_ARB_vertex_buffer_object
127 FF_PFNGLBUFFERDATAPROC glBufferData; //Require GL_ARB_vertex_buffer_object
128 FF_PFNGLBINDBUFFERPROC glBindBuffer; //Require GL_ARB_vertex_buffer_object
129 FF_PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation; //Require GL_ARB_vertex_shader
130 FF_PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray; //Require GL_ARB_vertex_shader
131 FF_PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer; //Require GL_ARB_vertex_shader
132 FF_PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation; //Require GL_ARB_shader_objects
133 FF_PFNGLUNIFORM1FPROC glUniform1f; //Require GL_ARB_shader_objects
134 FF_PFNGLUNIFORM1IPROC glUniform1i; //Require GL_ARB_shader_objects
135 FF_PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv; //Require GL_ARB_shader_objects
136 FF_PFNGLCREATEPROGRAMPROC glCreateProgram; //Require GL_ARB_shader_objects
137 FF_PFNGLDELETEPROGRAMPROC glDeleteProgram; //Require GL_ARB_shader_objects
138 FF_PFNGLUSEPROGRAMPROC glUseProgram; //Require GL_ARB_shader_objects
139 FF_PFNGLLINKPROGRAMPROC glLinkProgram; //Require GL_ARB_shader_objects
140 FF_PFNGLGETPROGRAMIVPROC glGetProgramiv; //Require GL_ARB_shader_objects
141 FF_PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog; //Require GL_ARB_shader_objects
142 FF_PFNGLATTACHSHADERPROC glAttachShader; //Require GL_ARB_shader_objects
143 FF_PFNGLCREATESHADERPROC glCreateShader; //Require GL_ARB_shader_objects
144 FF_PFNGLDELETESHADERPROC glDeleteShader; //Require GL_ARB_shader_objects
145 FF_PFNGLCOMPILESHADERPROC glCompileShader; //Require GL_ARB_shader_objects
146 FF_PFNGLSHADERSOURCEPROC glShaderSource; //Require GL_ARB_shader_objects
147 FF_PFNGLGETSHADERIVPROC glGetShaderiv; //Require GL_ARB_shader_objects
148 FF_PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog; //Require GL_ARB_shader_objects
151 #define OPENGL_ERROR_CHECK(ctx) \
154 if ((err_code = glGetError()) != GL_NO_ERROR) { \
155 av_log(ctx, AV_LOG_ERROR, "OpenGL error occurred in '%s', line %d: %d\n", __FUNCTION__, __LINE__, err_code); \
160 typedef struct OpenGLVertexInfo
162 float x, y, z; ///<Position
163 float s0, t0; ///<Texture coords
166 /* defines 2 triangles to display */
167 static GLushort g_index[6] =
173 typedef struct OpenGLContext {
174 AVClass *class; ///< class for private options
177 SDL_Surface *surface;
179 FFOpenGLFunctions glprocs;
181 uint8_t background[4]; ///< Background color
182 int no_window; ///< 0 for create default window
183 char *window_title; ///< Title of the window
185 /* OpenGL implementation limits */
186 GLint max_texture_size; ///< Maximum texture size
187 GLint max_viewport_width; ///< Maximum viewport size
188 GLint max_viewport_height; ///< Maximum viewport size
189 int non_pow_2_textures; ///< 1 when non power of 2 textures are supported
190 int unpack_subimage; ///< 1 when GL_EXT_unpack_subimage is available
192 /* Current OpenGL configuration */
193 GLuint program; ///< Shader program
194 GLuint vertex_shader; ///< Vertex shader
195 GLuint fragment_shader; ///< Fragment shader for current pix_pmt
196 GLuint texture_name[4]; ///< Textures' IDs
197 GLuint index_buffer; ///< Index buffer
198 GLuint vertex_buffer; ///< Vertex buffer
199 OpenGLVertexInfo vertex[4]; ///< VBO
200 GLint projection_matrix_location; ///< Uniforms' locations
201 GLint model_view_matrix_location;
202 GLint color_map_location;
203 GLint chroma_div_w_location;
204 GLint chroma_div_h_location;
205 GLint texture_location[4];
206 GLint position_attrib; ///< Attibutes' locations
207 GLint texture_coords_attrib;
209 GLfloat projection_matrix[16]; ///< Projection matrix
210 GLfloat model_view_matrix[16]; ///< Modev view matrix
211 GLfloat color_map[16]; ///< RGBA color map matrix
212 GLfloat chroma_div_w; ///< Chroma subsampling w ratio
213 GLfloat chroma_div_h; ///< Chroma subsampling h ratio
215 /* Stream information */
218 int width; ///< Stream width
219 int height; ///< Stream height
220 enum AVPixelFormat pix_fmt; ///< Stream pixel format
221 int picture_width; ///< Rendered width
222 int picture_height; ///< Rendered height
227 static const struct OpenGLFormatDesc {
228 enum AVPixelFormat fixel_format;
229 const char * const * fragment_shader;
232 } opengl_format_desc[] = {
233 { AV_PIX_FMT_YUV420P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
234 { AV_PIX_FMT_YUV444P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
235 { AV_PIX_FMT_YUV422P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
236 { AV_PIX_FMT_YUV410P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
237 { AV_PIX_FMT_YUV411P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
238 { AV_PIX_FMT_YUV440P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
239 { AV_PIX_FMT_YUV420P16, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
240 { AV_PIX_FMT_YUV422P16, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
241 { AV_PIX_FMT_YUV444P16, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
242 { AV_PIX_FMT_YUVA420P, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
243 { AV_PIX_FMT_YUVA444P, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
244 { AV_PIX_FMT_YUVA422P, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
245 { AV_PIX_FMT_YUVA420P16, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
246 { AV_PIX_FMT_YUVA422P16, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
247 { AV_PIX_FMT_YUVA444P16, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
248 { AV_PIX_FMT_RGB24, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_BYTE },
249 { AV_PIX_FMT_BGR24, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_BYTE },
250 { AV_PIX_FMT_0RGB, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
251 { AV_PIX_FMT_RGB0, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
252 { AV_PIX_FMT_0BGR, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
253 { AV_PIX_FMT_BGR0, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
254 { AV_PIX_FMT_RGB565, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 },
255 { AV_PIX_FMT_BGR565, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 },
256 { AV_PIX_FMT_RGB555, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, FF_GL_UNSIGNED_SHORT_1_5_5_5_REV },
257 { AV_PIX_FMT_BGR555, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, FF_GL_UNSIGNED_SHORT_1_5_5_5_REV },
258 { AV_PIX_FMT_RGB8, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, FF_GL_UNSIGNED_BYTE_3_3_2 },
259 { AV_PIX_FMT_BGR8, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, FF_GL_UNSIGNED_BYTE_2_3_3_REV },
260 { AV_PIX_FMT_RGB48, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_SHORT },
261 { AV_PIX_FMT_ARGB, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
262 { AV_PIX_FMT_RGBA, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
263 { AV_PIX_FMT_ABGR, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
264 { AV_PIX_FMT_BGRA, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
265 { AV_PIX_FMT_RGBA64, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_SHORT },
266 { AV_PIX_FMT_BGRA64, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_SHORT },
267 { AV_PIX_FMT_GBRP, &FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
268 { AV_PIX_FMT_GBRP16, &FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
269 { AV_PIX_FMT_GBRAP, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
270 { AV_PIX_FMT_GBRAP16, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
271 { AV_PIX_FMT_GRAY8, &FF_OPENGL_FRAGMENT_SHADER_GRAY, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
272 { AV_PIX_FMT_GRAY16, &FF_OPENGL_FRAGMENT_SHADER_GRAY, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
273 { AV_PIX_FMT_NONE, NULL }
276 static av_cold int opengl_prepare_vertex(AVFormatContext *s);
277 static int opengl_draw(AVFormatContext *h, void *intput, int repaint, int is_pkt);
278 static av_cold int opengl_init_context(OpenGLContext *opengl);
280 static av_cold void opengl_deinit_context(OpenGLContext *opengl)
282 glDeleteTextures(4, opengl->texture_name);
283 opengl->texture_name[0] = opengl->texture_name[1] =
284 opengl->texture_name[2] = opengl->texture_name[3] = 0;
285 if (opengl->glprocs.glUseProgram)
286 opengl->glprocs.glUseProgram(0);
287 if (opengl->glprocs.glDeleteProgram) {
288 opengl->glprocs.glDeleteProgram(opengl->program);
291 if (opengl->glprocs.glDeleteShader) {
292 opengl->glprocs.glDeleteShader(opengl->vertex_shader);
293 opengl->glprocs.glDeleteShader(opengl->fragment_shader);
294 opengl->vertex_shader = opengl->fragment_shader = 0;
296 if (opengl->glprocs.glBindBuffer) {
297 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, 0);
298 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, 0);
300 if (opengl->glprocs.glDeleteBuffers) {
301 opengl->glprocs.glDeleteBuffers(2, &opengl->index_buffer);
302 opengl->vertex_buffer = opengl->index_buffer = 0;
306 static int opengl_resize(AVFormatContext *h, int width, int height)
309 OpenGLContext *opengl = h->priv_data;
310 opengl->window_width = width;
311 opengl->window_height = height;
312 /* max_viewport_width == 0 means write_header was not called yet. */
313 if (opengl->max_viewport_width) {
314 if (opengl->no_window &&
315 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
316 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
319 if ((ret = opengl_prepare_vertex(h)) < 0)
321 ret = opengl_draw(h, NULL, 1, 0);
327 static int opengl_control_message(AVFormatContext *h, int type, void *data, size_t data_size)
329 OpenGLContext *opengl = h->priv_data;
331 case AV_APP_TO_DEV_WINDOW_SIZE:
333 AVDeviceRect *message = data;
334 return opengl_resize(h, message->width, message->height);
336 return AVERROR(EINVAL);
337 case AV_APP_TO_DEV_WINDOW_REPAINT:
338 return opengl_resize(h, opengl->window_width, opengl->window_height);
340 return AVERROR(ENOSYS);
344 static int opengl_sdl_recreate_window(OpenGLContext *opengl, int width, int height)
346 opengl->surface = SDL_SetVideoMode(width, height,
347 32, SDL_OPENGL | SDL_RESIZABLE);
348 if (!opengl->surface) {
349 av_log(opengl, AV_LOG_ERROR, "Unable to set video mode: %s\n", SDL_GetError());
350 return AVERROR_EXTERNAL;
352 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
353 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
354 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
355 SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
356 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
360 static int opengl_sdl_process_events(AVFormatContext *h)
363 OpenGLContext *opengl = h->priv_data;
366 while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_ALLEVENTS) > 0) {
367 switch (event.type) {
371 switch (event.key.keysym.sym) {
377 case SDL_VIDEORESIZE: {
380 AVDeviceRect message;
381 /* clean up old context because SDL_SetVideoMode may lose its state. */
382 SDL_VideoDriverName(buffer, sizeof(buffer));
383 reinit = !av_strncasecmp(buffer, "quartz", sizeof(buffer));
385 opengl_deinit_context(opengl);
387 if ((ret = opengl_sdl_recreate_window(opengl, event.resize.w, event.resize.h)) < 0)
389 if (reinit && (ret = opengl_init_context(opengl)) < 0)
391 message.width = opengl->surface->w;
392 message.height = opengl->surface->h;
393 return opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
400 static int av_cold opengl_sdl_create_window(AVFormatContext *h)
404 OpenGLContext *opengl = h->priv_data;
405 AVDeviceRect message;
406 if (SDL_Init(SDL_INIT_VIDEO)) {
407 av_log(opengl, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError());
408 return AVERROR_EXTERNAL;
410 if ((ret = opengl_sdl_recreate_window(opengl, opengl->width, opengl->height)) < 0)
412 av_log(opengl, AV_LOG_INFO, "SDL driver: '%s'.\n", SDL_VideoDriverName(buffer, sizeof(buffer)));
413 message.width = opengl->surface->w;
414 message.height = opengl->surface->h;
415 SDL_WM_SetCaption(opengl->window_title, NULL);
416 opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
420 static int av_cold opengl_sdl_load_procedures(OpenGLContext *opengl)
422 FFOpenGLFunctions *procs = &opengl->glprocs;
424 #define LOAD_OPENGL_FUN(name, type) \
425 procs->name = (type)SDL_GL_GetProcAddress(#name); \
426 if (!procs->name) { \
427 av_log(opengl, AV_LOG_ERROR, "Cannot load OpenGL function: '%s'\n", #name); \
428 return AVERROR(ENOSYS); \
431 LOAD_OPENGL_FUN(glActiveTexture, FF_PFNGLACTIVETEXTUREPROC)
432 LOAD_OPENGL_FUN(glGenBuffers, FF_PFNGLGENBUFFERSPROC)
433 LOAD_OPENGL_FUN(glDeleteBuffers, FF_PFNGLDELETEBUFFERSPROC)
434 LOAD_OPENGL_FUN(glBufferData, FF_PFNGLBUFFERDATAPROC)
435 LOAD_OPENGL_FUN(glBindBuffer, FF_PFNGLBINDBUFFERPROC)
436 LOAD_OPENGL_FUN(glGetAttribLocation, FF_PFNGLGETATTRIBLOCATIONPROC)
437 LOAD_OPENGL_FUN(glGetUniformLocation, FF_PFNGLGETUNIFORMLOCATIONPROC)
438 LOAD_OPENGL_FUN(glUniform1f, FF_PFNGLUNIFORM1FPROC)
439 LOAD_OPENGL_FUN(glUniform1i, FF_PFNGLUNIFORM1IPROC)
440 LOAD_OPENGL_FUN(glUniformMatrix4fv, FF_PFNGLUNIFORMMATRIX4FVPROC)
441 LOAD_OPENGL_FUN(glCreateProgram, FF_PFNGLCREATEPROGRAMPROC)
442 LOAD_OPENGL_FUN(glDeleteProgram, FF_PFNGLDELETEPROGRAMPROC)
443 LOAD_OPENGL_FUN(glUseProgram, FF_PFNGLUSEPROGRAMPROC)
444 LOAD_OPENGL_FUN(glLinkProgram, FF_PFNGLLINKPROGRAMPROC)
445 LOAD_OPENGL_FUN(glGetProgramiv, FF_PFNGLGETPROGRAMIVPROC)
446 LOAD_OPENGL_FUN(glGetProgramInfoLog, FF_PFNGLGETPROGRAMINFOLOGPROC)
447 LOAD_OPENGL_FUN(glAttachShader, FF_PFNGLATTACHSHADERPROC)
448 LOAD_OPENGL_FUN(glCreateShader, FF_PFNGLCREATESHADERPROC)
449 LOAD_OPENGL_FUN(glDeleteShader, FF_PFNGLDELETESHADERPROC)
450 LOAD_OPENGL_FUN(glCompileShader, FF_PFNGLCOMPILESHADERPROC)
451 LOAD_OPENGL_FUN(glShaderSource, FF_PFNGLSHADERSOURCEPROC)
452 LOAD_OPENGL_FUN(glGetShaderiv, FF_PFNGLGETSHADERIVPROC)
453 LOAD_OPENGL_FUN(glGetShaderInfoLog, FF_PFNGLGETSHADERINFOLOGPROC)
454 LOAD_OPENGL_FUN(glEnableVertexAttribArray, FF_PFNGLENABLEVERTEXATTRIBARRAYPROC)
455 LOAD_OPENGL_FUN(glVertexAttribPointer, FF_PFNGLVERTEXATTRIBPOINTERPROC)
459 #undef LOAD_OPENGL_FUN
461 #endif /* HAVE_SDL */
463 #if defined(__APPLE__)
464 static int av_cold opengl_load_procedures(OpenGLContext *opengl)
466 FFOpenGLFunctions *procs = &opengl->glprocs;
469 if (!opengl->no_window)
470 return opengl_sdl_load_procedures(opengl);
473 procs->glActiveTexture = glActiveTexture;
474 procs->glGenBuffers = glGenBuffers;
475 procs->glDeleteBuffers = glDeleteBuffers;
476 procs->glBufferData = glBufferData;
477 procs->glBindBuffer = glBindBuffer;
478 procs->glGetAttribLocation = glGetAttribLocation;
479 procs->glGetUniformLocation = glGetUniformLocation;
480 procs->glUniform1f = glUniform1f;
481 procs->glUniform1i = glUniform1i;
482 procs->glUniformMatrix4fv = glUniformMatrix4fv;
483 procs->glCreateProgram = glCreateProgram;
484 procs->glDeleteProgram = glDeleteProgram;
485 procs->glUseProgram = glUseProgram;
486 procs->glLinkProgram = glLinkProgram;
487 procs->glGetProgramiv = glGetProgramiv;
488 procs->glGetProgramInfoLog = glGetProgramInfoLog;
489 procs->glAttachShader = glAttachShader;
490 procs->glCreateShader = glCreateShader;
491 procs->glDeleteShader = glDeleteShader;
492 procs->glCompileShader = glCompileShader;
493 procs->glShaderSource = glShaderSource;
494 procs->glGetShaderiv = glGetShaderiv;
495 procs->glGetShaderInfoLog = glGetShaderInfoLog;
496 procs->glEnableVertexAttribArray = glEnableVertexAttribArray;
497 procs->glVertexAttribPointer = (FF_PFNGLVERTEXATTRIBPOINTERPROC) glVertexAttribPointer;
501 static int av_cold opengl_load_procedures(OpenGLContext *opengl)
503 FFOpenGLFunctions *procs = &opengl->glprocs;
505 #if HAVE_GLXGETPROCADDRESS
506 #define SelectedGetProcAddress glXGetProcAddress
507 #elif HAVE_WGLGETPROCADDRESS
508 #define SelectedGetProcAddress wglGetProcAddress
511 #define LOAD_OPENGL_FUN(name, type) \
512 procs->name = (type)SelectedGetProcAddress(#name); \
513 if (!procs->name) { \
514 av_log(opengl, AV_LOG_ERROR, "Cannot load OpenGL function: '%s'\n", #name); \
515 return AVERROR(ENOSYS); \
519 if (!opengl->no_window)
520 return opengl_sdl_load_procedures(opengl);
523 LOAD_OPENGL_FUN(glActiveTexture, FF_PFNGLACTIVETEXTUREPROC)
524 LOAD_OPENGL_FUN(glGenBuffers, FF_PFNGLGENBUFFERSPROC)
525 LOAD_OPENGL_FUN(glDeleteBuffers, FF_PFNGLDELETEBUFFERSPROC)
526 LOAD_OPENGL_FUN(glBufferData, FF_PFNGLBUFFERDATAPROC)
527 LOAD_OPENGL_FUN(glBindBuffer, FF_PFNGLBINDBUFFERPROC)
528 LOAD_OPENGL_FUN(glGetAttribLocation, FF_PFNGLGETATTRIBLOCATIONPROC)
529 LOAD_OPENGL_FUN(glGetUniformLocation, FF_PFNGLGETUNIFORMLOCATIONPROC)
530 LOAD_OPENGL_FUN(glUniform1f, FF_PFNGLUNIFORM1FPROC)
531 LOAD_OPENGL_FUN(glUniform1i, FF_PFNGLUNIFORM1IPROC)
532 LOAD_OPENGL_FUN(glUniformMatrix4fv, FF_PFNGLUNIFORMMATRIX4FVPROC)
533 LOAD_OPENGL_FUN(glCreateProgram, FF_PFNGLCREATEPROGRAMPROC)
534 LOAD_OPENGL_FUN(glDeleteProgram, FF_PFNGLDELETEPROGRAMPROC)
535 LOAD_OPENGL_FUN(glUseProgram, FF_PFNGLUSEPROGRAMPROC)
536 LOAD_OPENGL_FUN(glLinkProgram, FF_PFNGLLINKPROGRAMPROC)
537 LOAD_OPENGL_FUN(glGetProgramiv, FF_PFNGLGETPROGRAMIVPROC)
538 LOAD_OPENGL_FUN(glGetProgramInfoLog, FF_PFNGLGETPROGRAMINFOLOGPROC)
539 LOAD_OPENGL_FUN(glAttachShader, FF_PFNGLATTACHSHADERPROC)
540 LOAD_OPENGL_FUN(glCreateShader, FF_PFNGLCREATESHADERPROC)
541 LOAD_OPENGL_FUN(glDeleteShader, FF_PFNGLDELETESHADERPROC)
542 LOAD_OPENGL_FUN(glCompileShader, FF_PFNGLCOMPILESHADERPROC)
543 LOAD_OPENGL_FUN(glShaderSource, FF_PFNGLSHADERSOURCEPROC)
544 LOAD_OPENGL_FUN(glGetShaderiv, FF_PFNGLGETSHADERIVPROC)
545 LOAD_OPENGL_FUN(glGetShaderInfoLog, FF_PFNGLGETSHADERINFOLOGPROC)
546 LOAD_OPENGL_FUN(glEnableVertexAttribArray, FF_PFNGLENABLEVERTEXATTRIBARRAYPROC)
547 LOAD_OPENGL_FUN(glVertexAttribPointer, FF_PFNGLVERTEXATTRIBPOINTERPROC)
551 #undef SelectedGetProcAddress
552 #undef LOAD_OPENGL_FUN
556 static void opengl_make_identity(float matrix[16])
558 memset(matrix, 0, 16 * sizeof(float));
559 matrix[0] = matrix[5] = matrix[10] = matrix[15] = 1.0f;
562 static void opengl_make_ortho(float matrix[16], float left, float right,
563 float bottom, float top, float nearZ, float farZ)
565 float ral = right + left;
566 float rsl = right - left;
567 float tab = top + bottom;
568 float tsb = top - bottom;
569 float fan = farZ + nearZ;
570 float fsn = farZ - nearZ;
572 memset(matrix, 0, 16 * sizeof(float));
573 matrix[0] = 2.0f / rsl;
574 matrix[5] = 2.0f / tsb;
575 matrix[10] = -2.0f / fsn;
576 matrix[12] = -ral / rsl;
577 matrix[13] = -tab / tsb;
578 matrix[14] = -fan / fsn;
582 static av_cold int opengl_read_limits(OpenGLContext *opengl)
585 const char *extention;
588 } required_extensions[] = {
589 { "GL_ARB_multitexture", 1, 3 },
590 { "GL_ARB_vertex_buffer_object", 1, 5 }, //GLX_ARB_vertex_buffer_object
591 { "GL_ARB_vertex_shader", 2, 0 },
592 { "GL_ARB_fragment_shader", 2, 0 },
593 { "GL_ARB_shader_objects", 2, 0 },
597 const char *extensions, *version;
599 version = glGetString(GL_VERSION);
600 extensions = glGetString(GL_EXTENSIONS);
602 av_log(opengl, AV_LOG_DEBUG, "OpenGL version: %s\n", version);
603 sscanf(version, "%d.%d", &major, &minor);
605 for (i = 0; required_extensions[i].extention; i++) {
606 if (major < required_extensions[i].major &&
607 (major == required_extensions[i].major && minor < required_extensions[i].minor) &&
608 !strstr(extensions, required_extensions[i].extention)) {
609 av_log(opengl, AV_LOG_ERROR, "Required extension %s is not supported.\n",
610 required_extensions[i].extention);
611 av_log(opengl, AV_LOG_DEBUG, "Supported extensions are: %s\n", extensions);
612 return AVERROR(ENOSYS);
615 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &opengl->max_texture_size);
616 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, &opengl->max_viewport_width);
617 opengl->non_pow_2_textures = major >= 2 || strstr(extensions, "GL_ARB_texture_non_power_of_two");
618 #if defined(GL_ES_VERSION_2_0)
619 opengl->unpack_subimage = !!strstr(extensions, "GL_EXT_unpack_subimage");
621 opengl->unpack_subimage = 1;
624 av_log(opengl, AV_LOG_DEBUG, "Non Power of 2 textures support: %s\n", opengl->non_pow_2_textures ? "Yes" : "No");
625 av_log(opengl, AV_LOG_DEBUG, "Unpack Subimage extension support: %s\n", opengl->unpack_subimage ? "Yes" : "No");
626 av_log(opengl, AV_LOG_DEBUG, "Max texture size: %dx%d\n", opengl->max_texture_size, opengl->max_texture_size);
627 av_log(opengl, AV_LOG_DEBUG, "Max viewport size: %dx%d\n",
628 opengl->max_viewport_width, opengl->max_viewport_height);
630 OPENGL_ERROR_CHECK(opengl);
633 return AVERROR_EXTERNAL;
636 static const char* opengl_get_fragment_shader_code(enum AVPixelFormat format)
639 for (i = 0; i < FF_ARRAY_ELEMS(opengl_format_desc); i++) {
640 if (opengl_format_desc[i].fixel_format == format)
641 return *opengl_format_desc[i].fragment_shader;
646 static int opengl_type_size(GLenum type)
649 case GL_UNSIGNED_SHORT:
650 case FF_GL_UNSIGNED_SHORT_1_5_5_5_REV:
651 case GL_UNSIGNED_SHORT_5_6_5:
653 case GL_UNSIGNED_BYTE:
654 case FF_GL_UNSIGNED_BYTE_3_3_2:
655 case FF_GL_UNSIGNED_BYTE_2_3_3_REV:
662 static av_cold void opengl_get_texture_params(OpenGLContext *opengl)
665 for (i = 0; i < FF_ARRAY_ELEMS(opengl_format_desc); i++) {
666 if (opengl_format_desc[i].fixel_format == opengl->pix_fmt) {
667 opengl->format = opengl_format_desc[i].format;
668 opengl->type = opengl_format_desc[i].type;
674 static void opengl_compute_display_area(AVFormatContext *s)
676 AVRational sar, dar; /* sample and display aspect ratios */
677 OpenGLContext *opengl = s->priv_data;
678 AVStream *st = s->streams[0];
679 AVCodecContext *encctx = st->codec;
681 /* compute overlay width and height from the codec context information */
682 sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 };
683 dar = av_mul_q(sar, (AVRational){ encctx->width, encctx->height });
685 /* we suppose the screen has a 1/1 sample aspect ratio */
686 /* fit in the window */
687 if (av_cmp_q(dar, (AVRational){ opengl->window_width, opengl->window_height }) > 0) {
689 opengl->picture_width = opengl->window_width;
690 opengl->picture_height = av_rescale(opengl->picture_width, dar.den, dar.num);
693 opengl->picture_height = opengl->window_height;
694 opengl->picture_width = av_rescale(opengl->picture_height, dar.num, dar.den);
698 static av_cold void opengl_get_texture_size(OpenGLContext *opengl, int in_width, int in_height,
699 int *out_width, int *out_height)
701 if (opengl->non_pow_2_textures) {
702 *out_width = in_width;
703 *out_height = in_height;
705 int max = FFMIN(FFMAX(in_width, in_height), opengl->max_texture_size);
706 unsigned power_of_2 = 1;
707 while (power_of_2 < max)
709 *out_height = power_of_2;
710 *out_width = power_of_2;
711 av_log(opengl, AV_LOG_DEBUG, "Texture size calculated from %dx%d into %dx%d\n",
712 in_width, in_height, *out_width, *out_height);
716 static av_cold void opengl_fill_color_map(OpenGLContext *opengl)
718 const AVPixFmtDescriptor *desc;
720 enum AVPixelFormat pix_fmt = opengl->pix_fmt;
722 /* We need order of components, not exact position, some minor HACKs here */
723 if (pix_fmt == AV_PIX_FMT_RGB565 || pix_fmt == AV_PIX_FMT_BGR555 ||
724 pix_fmt == AV_PIX_FMT_BGR8 || pix_fmt == AV_PIX_FMT_RGB8)
725 pix_fmt = AV_PIX_FMT_RGB24;
726 else if (pix_fmt == AV_PIX_FMT_BGR565 || pix_fmt == AV_PIX_FMT_RGB555)
727 pix_fmt = AV_PIX_FMT_BGR24;
729 desc = av_pix_fmt_desc_get(pix_fmt);
730 if (!(desc->flags & AV_PIX_FMT_FLAG_RGB))
733 #define FILL_COMPONENT(i) { \
734 shift = desc->comp[i].depth_minus1 >> 3; \
735 opengl->color_map[(i << 2) + ((desc->comp[i].offset_plus1 - 1) >> shift)] = 1.0; \
738 memset(opengl->color_map, 0, sizeof(opengl->color_map));
742 if (desc->flags & AV_PIX_FMT_FLAG_ALPHA)
745 #undef FILL_COMPONENT
748 static av_cold GLuint opengl_load_shader(OpenGLContext *opengl, GLenum type, const char *source)
750 GLuint shader = opengl->glprocs.glCreateShader(type);
753 av_log(opengl, AV_LOG_ERROR, "glCreateShader() failed\n");
756 opengl->glprocs.glShaderSource(shader, 1, &source, NULL);
757 opengl->glprocs.glCompileShader(shader);
759 opengl->glprocs.glGetShaderiv(shader, FF_GL_COMPILE_STATUS, &result);
762 opengl->glprocs.glGetShaderiv(shader, FF_GL_INFO_LOG_LENGTH, &result);
764 if ((log = av_malloc(result))) {
765 opengl->glprocs.glGetShaderInfoLog(shader, result, NULL, log);
766 av_log(opengl, AV_LOG_ERROR, "Compile error: %s\n", log);
772 OPENGL_ERROR_CHECK(opengl);
775 opengl->glprocs.glDeleteShader(shader);
779 static av_cold int opengl_compile_shaders(OpenGLContext *opengl, enum AVPixelFormat pix_fmt)
782 const char *fragment_shader_code = opengl_get_fragment_shader_code(pix_fmt);
784 if (!fragment_shader_code) {
785 av_log(opengl, AV_LOG_ERROR, "Provided pixel format '%s' is not supported\n",
786 av_get_pix_fmt_name(pix_fmt));
787 return AVERROR(EINVAL);
790 opengl->vertex_shader = opengl_load_shader(opengl, FF_GL_VERTEX_SHADER,
791 FF_OPENGL_VERTEX_SHADER);
792 if (!opengl->vertex_shader) {
793 av_log(opengl, AV_LOG_ERROR, "Vertex shader loading failed.\n");
796 opengl->fragment_shader = opengl_load_shader(opengl, FF_GL_FRAGMENT_SHADER,
797 fragment_shader_code);
798 if (!opengl->fragment_shader) {
799 av_log(opengl, AV_LOG_ERROR, "Fragment shader loading failed.\n");
803 opengl->program = opengl->glprocs.glCreateProgram();
804 if (!opengl->program)
807 opengl->glprocs.glAttachShader(opengl->program, opengl->vertex_shader);
808 opengl->glprocs.glAttachShader(opengl->program, opengl->fragment_shader);
809 opengl->glprocs.glLinkProgram(opengl->program);
811 opengl->glprocs.glGetProgramiv(opengl->program, FF_GL_LINK_STATUS, &result);
814 opengl->glprocs.glGetProgramiv(opengl->program, FF_GL_INFO_LOG_LENGTH, &result);
816 log = av_malloc(result);
819 opengl->glprocs.glGetProgramInfoLog(opengl->program, result, NULL, log);
820 av_log(opengl, AV_LOG_ERROR, "Link error: %s\n", log);
826 opengl->position_attrib = opengl->glprocs.glGetAttribLocation(opengl->program, "a_position");
827 opengl->texture_coords_attrib = opengl->glprocs.glGetAttribLocation(opengl->program, "a_textureCoords");
828 opengl->projection_matrix_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_projectionMatrix");
829 opengl->model_view_matrix_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_modelViewMatrix");
830 opengl->color_map_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_colorMap");
831 opengl->texture_location[0] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture0");
832 opengl->texture_location[1] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture1");
833 opengl->texture_location[2] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture2");
834 opengl->texture_location[3] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture3");
835 opengl->chroma_div_w_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_chroma_div_w");
836 opengl->chroma_div_h_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_chroma_div_h");
838 OPENGL_ERROR_CHECK(opengl);
841 opengl->glprocs.glDeleteShader(opengl->vertex_shader);
842 opengl->glprocs.glDeleteShader(opengl->fragment_shader);
843 opengl->glprocs.glDeleteProgram(opengl->program);
844 opengl->fragment_shader = opengl->vertex_shader = opengl->program = 0;
845 return AVERROR_EXTERNAL;
848 static av_cold int opengl_configure_texture(OpenGLContext *opengl, GLuint texture,
849 GLsizei width, GLsizei height)
852 int new_width, new_height;
853 opengl_get_texture_size(opengl, width, height, &new_width, &new_height);
854 glBindTexture(GL_TEXTURE_2D, texture);
855 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
856 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
857 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
858 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
859 glTexImage2D(GL_TEXTURE_2D, 0, opengl->format, new_width, new_height, 0,
860 opengl->format, opengl->type, NULL);
861 OPENGL_ERROR_CHECK(NULL);
865 return AVERROR_EXTERNAL;
868 static av_cold int opengl_prepare_vertex(AVFormatContext *s)
870 OpenGLContext *opengl = s->priv_data;
873 if (opengl->window_width > opengl->max_viewport_width || opengl->window_height > opengl->max_viewport_height) {
874 opengl->window_width = FFMAX(opengl->window_width, opengl->max_viewport_width);
875 opengl->window_height = FFMAX(opengl->window_height, opengl->max_viewport_height);
876 av_log(opengl, AV_LOG_WARNING, "Too big viewport requested, limited to %dx%d", opengl->window_width, opengl->window_height);
878 glViewport(0, 0, opengl->window_width, opengl->window_height);
879 opengl_make_ortho(opengl->projection_matrix,
880 - (float)opengl->window_width / 2.0f, (float)opengl->window_width / 2.0f,
881 - (float)opengl->window_height / 2.0f, (float)opengl->window_height / 2.0f,
883 opengl_make_identity(opengl->model_view_matrix);
885 opengl_compute_display_area(s);
887 opengl->vertex[0].z = opengl->vertex[1].z = opengl->vertex[2].z = opengl->vertex[3].z = 0.0f;
888 opengl->vertex[0].x = opengl->vertex[1].x = - (float)opengl->picture_width / 2.0f;
889 opengl->vertex[2].x = opengl->vertex[3].x = (float)opengl->picture_width / 2.0f;
890 opengl->vertex[1].y = opengl->vertex[2].y = - (float)opengl->picture_height / 2.0f;
891 opengl->vertex[0].y = opengl->vertex[3].y = (float)opengl->picture_height / 2.0f;
893 opengl_get_texture_size(opengl, opengl->width, opengl->height, &tex_w, &tex_h);
895 opengl->vertex[0].s0 = 0.0f;
896 opengl->vertex[0].t0 = 0.0f;
897 opengl->vertex[1].s0 = 0.0f;
898 opengl->vertex[1].t0 = (float)opengl->height / (float)tex_h;
899 opengl->vertex[2].s0 = (float)opengl->width / (float)tex_w;
900 opengl->vertex[2].t0 = (float)opengl->height / (float)tex_h;
901 opengl->vertex[3].s0 = (float)opengl->width / (float)tex_w;
902 opengl->vertex[3].t0 = 0.0f;
904 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, opengl->vertex_buffer);
905 opengl->glprocs.glBufferData(FF_GL_ARRAY_BUFFER, sizeof(opengl->vertex), opengl->vertex, FF_GL_STATIC_DRAW);
906 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, 0);
907 OPENGL_ERROR_CHECK(opengl);
910 return AVERROR_EXTERNAL;
913 static int opengl_prepare(OpenGLContext *opengl)
916 opengl->glprocs.glUseProgram(opengl->program);
917 opengl->glprocs.glUniformMatrix4fv(opengl->projection_matrix_location, 1, GL_FALSE, opengl->projection_matrix);
918 opengl->glprocs.glUniformMatrix4fv(opengl->model_view_matrix_location, 1, GL_FALSE, opengl->model_view_matrix);
919 for (i = 0; i < 4; i++)
920 if (opengl->texture_location[i] != -1) {
921 opengl->glprocs.glActiveTexture(GL_TEXTURE0 + i);
922 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[i]);
923 opengl->glprocs.glUniform1i(opengl->texture_location[i], i);
925 if (opengl->color_map_location != -1)
926 opengl->glprocs.glUniformMatrix4fv(opengl->color_map_location, 1, GL_FALSE, opengl->color_map);
927 if (opengl->chroma_div_h_location != -1)
928 opengl->glprocs.glUniform1f(opengl->chroma_div_h_location, opengl->chroma_div_h);
929 if (opengl->chroma_div_w_location != -1)
930 opengl->glprocs.glUniform1f(opengl->chroma_div_w_location, opengl->chroma_div_w);
932 OPENGL_ERROR_CHECK(opengl);
935 return AVERROR_EXTERNAL;
938 static int opengl_create_window(AVFormatContext *h)
940 OpenGLContext *opengl = h->priv_data;
943 if (!opengl->no_window) {
945 if ((ret = opengl_sdl_create_window(h)) < 0) {
946 av_log(opengl, AV_LOG_ERROR, "Cannot create default SDL window.\n");
950 av_log(opengl, AV_LOG_ERROR, "FFmpeg is compiled without SDL. Cannot create default window.\n");
951 return AVERROR(ENOSYS);
954 if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_CREATE_WINDOW_BUFFER, NULL , 0)) < 0) {
955 av_log(opengl, AV_LOG_ERROR, "Application failed to create window buffer.\n");
958 if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
959 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
966 static int opengl_release_window(AVFormatContext *h)
969 OpenGLContext *opengl = h->priv_data;
970 if (!opengl->no_window) {
974 } else if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER, NULL , 0)) < 0) {
975 av_log(opengl, AV_LOG_ERROR, "Application failed to release window buffer.\n");
981 static av_cold int opengl_write_trailer(AVFormatContext *h)
983 OpenGLContext *opengl = h->priv_data;
985 if (opengl->no_window &&
986 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0) < 0)
987 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
989 opengl_deinit_context(opengl);
990 opengl_release_window(h);
995 static av_cold int opengl_init_context(OpenGLContext *opengl)
998 const AVPixFmtDescriptor *desc;
1000 if ((ret = opengl_compile_shaders(opengl, opengl->pix_fmt)) < 0)
1003 desc = av_pix_fmt_desc_get(opengl->pix_fmt);
1004 av_assert0(desc->nb_components > 0 && desc->nb_components <= 4);
1005 glGenTextures(desc->nb_components, opengl->texture_name);
1007 opengl->glprocs.glGenBuffers(2, &opengl->index_buffer);
1008 if (!opengl->index_buffer || !opengl->vertex_buffer) {
1009 av_log(opengl, AV_LOG_ERROR, "Buffer generation failed.\n");
1010 ret = AVERROR_EXTERNAL;
1014 opengl_configure_texture(opengl, opengl->texture_name[0], opengl->width, opengl->height);
1015 if (desc->nb_components > 1) {
1016 int has_alpha = desc->flags & AV_PIX_FMT_FLAG_ALPHA;
1017 int num_planes = desc->nb_components - (has_alpha ? 1 : 0);
1018 if (opengl->non_pow_2_textures) {
1019 opengl->chroma_div_w = 1.0f;
1020 opengl->chroma_div_h = 1.0f;
1022 opengl->chroma_div_w = 1 << desc->log2_chroma_w;
1023 opengl->chroma_div_h = 1 << desc->log2_chroma_h;
1025 for (i = 1; i < num_planes; i++)
1026 if (opengl->non_pow_2_textures)
1027 opengl_configure_texture(opengl, opengl->texture_name[i],
1028 FF_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w),
1029 FF_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h));
1031 opengl_configure_texture(opengl, opengl->texture_name[i], opengl->width, opengl->height);
1033 opengl_configure_texture(opengl, opengl->texture_name[3], opengl->width, opengl->height);
1036 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, opengl->index_buffer);
1037 opengl->glprocs.glBufferData(FF_GL_ELEMENT_ARRAY_BUFFER, sizeof(g_index), g_index, FF_GL_STATIC_DRAW);
1038 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, 0);
1041 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1043 glClearColor((float)opengl->background[0] / 255.0f, (float)opengl->background[1] / 255.0f,
1044 (float)opengl->background[2] / 255.0f, 1.0f);
1046 ret = AVERROR_EXTERNAL;
1047 OPENGL_ERROR_CHECK(opengl);
1054 static av_cold int opengl_write_header(AVFormatContext *h)
1056 OpenGLContext *opengl = h->priv_data;
1060 if (h->nb_streams != 1 ||
1061 h->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
1062 h->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
1063 av_log(opengl, AV_LOG_ERROR, "Only a single video stream is supported.\n");
1064 return AVERROR(EINVAL);
1067 opengl->width = st->codec->width;
1068 opengl->height = st->codec->height;
1069 opengl->pix_fmt = st->codec->pix_fmt;
1071 if (!opengl->window_title && !opengl->no_window)
1072 opengl->window_title = av_strdup(h->filename);
1074 if ((ret = opengl_create_window(h)))
1077 if ((ret = opengl_read_limits(opengl)) < 0)
1080 if (opengl->width > opengl->max_texture_size || opengl->height > opengl->max_texture_size) {
1081 av_log(opengl, AV_LOG_ERROR, "Too big picture %dx%d, max supported size is %dx%d\n",
1082 opengl->width, opengl->height, opengl->max_texture_size, opengl->max_texture_size);
1083 ret = AVERROR(EINVAL);
1087 if ((ret = opengl_load_procedures(opengl)) < 0)
1090 opengl_fill_color_map(opengl);
1091 opengl_get_texture_params(opengl);
1093 if ((ret = opengl_init_context(opengl)) < 0)
1096 if ((ret = opengl_prepare_vertex(h)) < 0)
1099 glClear(GL_COLOR_BUFFER_BIT);
1102 if (!opengl->no_window)
1103 SDL_GL_SwapBuffers();
1105 if (opengl->no_window &&
1106 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
1107 av_log(opengl, AV_LOG_ERROR, "Application failed to display window buffer.\n");
1111 ret = AVERROR_EXTERNAL;
1112 OPENGL_ERROR_CHECK(opengl);
1116 opengl_write_trailer(h);
1120 static uint8_t* opengl_get_plane_pointer(OpenGLContext *opengl, AVPacket *pkt, int comp_index,
1121 const AVPixFmtDescriptor *desc)
1123 uint8_t *data = pkt->data;
1124 int wordsize = opengl_type_size(opengl->type);
1125 int width_chroma = FF_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w);
1126 int height_chroma = FF_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h);
1127 int plane = desc->comp[comp_index].plane;
1133 data += opengl->width * opengl->height * wordsize;
1136 data += opengl->width * opengl->height * wordsize;
1137 data += width_chroma * height_chroma * wordsize;
1140 data += opengl->width * opengl->height * wordsize;
1141 data += 2 * width_chroma * height_chroma * wordsize;
1149 #define LOAD_TEXTURE_DATA(comp_index, sub) \
1151 int width = sub ? FF_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w) : opengl->width; \
1152 int height = sub ? FF_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h): opengl->height; \
1154 int plane = desc->comp[comp_index].plane; \
1156 glBindTexture(GL_TEXTURE_2D, opengl->texture_name[comp_index]); \
1158 GLint length = ((AVFrame *)input)->linesize[plane]; \
1159 int bytes_per_pixel = opengl_type_size(opengl->type); \
1160 if (!(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) \
1161 bytes_per_pixel *= desc->nb_components; \
1162 data = ((AVFrame *)input)->data[plane]; \
1163 if (!(length % bytes_per_pixel) && \
1164 (opengl->unpack_subimage || ((length / bytes_per_pixel) == width))) { \
1165 length /= bytes_per_pixel; \
1166 if (length != width) \
1167 glPixelStorei(FF_GL_UNPACK_ROW_LENGTH, length); \
1168 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, \
1169 opengl->format, opengl->type, data); \
1170 if (length != width) \
1171 glPixelStorei(FF_GL_UNPACK_ROW_LENGTH, 0); \
1174 for (h = 0; h < height; h++) { \
1175 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, h, width, 1, \
1176 opengl->format, opengl->type, data); \
1181 data = opengl_get_plane_pointer(opengl, input, comp_index, desc); \
1182 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, \
1183 opengl->format, opengl->type, data); \
1187 static int opengl_draw(AVFormatContext *h, void *input, int repaint, int is_pkt)
1189 OpenGLContext *opengl = h->priv_data;
1190 enum AVPixelFormat pix_fmt = h->streams[0]->codec->pix_fmt;
1191 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
1195 if (!opengl->no_window && (ret = opengl_sdl_process_events(h)) < 0)
1198 if (opengl->no_window &&
1199 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
1200 av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
1204 glClear(GL_COLOR_BUFFER_BIT);
1207 LOAD_TEXTURE_DATA(0, 0)
1208 if (desc->flags & AV_PIX_FMT_FLAG_PLANAR) {
1209 LOAD_TEXTURE_DATA(1, 1)
1210 LOAD_TEXTURE_DATA(2, 1)
1211 if (desc->flags & AV_PIX_FMT_FLAG_ALPHA)
1212 LOAD_TEXTURE_DATA(3, 0)
1215 ret = AVERROR_EXTERNAL;
1216 OPENGL_ERROR_CHECK(opengl);
1218 if ((ret = opengl_prepare(opengl)) < 0)
1221 opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, opengl->vertex_buffer);
1222 opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, opengl->index_buffer);
1223 opengl->glprocs.glVertexAttribPointer(opengl->position_attrib, 3, GL_FLOAT, GL_FALSE, sizeof(OpenGLVertexInfo), 0);
1224 opengl->glprocs.glEnableVertexAttribArray(opengl->position_attrib);
1225 opengl->glprocs.glVertexAttribPointer(opengl->texture_coords_attrib, 2, GL_FLOAT, GL_FALSE, sizeof(OpenGLVertexInfo), 12);
1226 opengl->glprocs.glEnableVertexAttribArray(opengl->texture_coords_attrib);
1228 glDrawElements(GL_TRIANGLES, FF_ARRAY_ELEMS(g_index), GL_UNSIGNED_SHORT, 0);
1230 ret = AVERROR_EXTERNAL;
1231 OPENGL_ERROR_CHECK(opengl);
1234 if (!opengl->no_window)
1235 SDL_GL_SwapBuffers();
1237 if (opengl->no_window &&
1238 (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
1239 av_log(opengl, AV_LOG_ERROR, "Application failed to display window buffer.\n");
1248 static int opengl_write_packet(AVFormatContext *h, AVPacket *pkt)
1250 return opengl_draw(h, pkt, 0, 1);
1253 static int opengl_write_frame(AVFormatContext *h, int stream_index,
1254 AVFrame **frame, unsigned flags)
1256 if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
1258 return opengl_draw(h, *frame, 0, 0);
1261 #define OFFSET(x) offsetof(OpenGLContext, x)
1262 #define ENC AV_OPT_FLAG_ENCODING_PARAM
1263 static const AVOption options[] = {
1264 { "background", "set background color", OFFSET(background), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, ENC },
1265 { "no_window", "disable default window", OFFSET(no_window), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
1266 { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, ENC },
1270 static const AVClass opengl_class = {
1271 .class_name = "opengl outdev",
1272 .item_name = av_default_item_name,
1274 .version = LIBAVUTIL_VERSION_INT,
1277 AVOutputFormat ff_opengl_muxer = {
1279 .long_name = NULL_IF_CONFIG_SMALL("OpenGL output"),
1280 .priv_data_size = sizeof(OpenGLContext),
1281 .audio_codec = AV_CODEC_ID_NONE,
1282 .video_codec = AV_CODEC_ID_RAWVIDEO,
1283 .write_header = opengl_write_header,
1284 .write_packet = opengl_write_packet,
1285 .write_uncoded_frame = opengl_write_frame,
1286 .write_trailer = opengl_write_trailer,
1287 .control_message = opengl_control_message,
1288 .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
1289 .priv_class = &opengl_class,