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opengl_enc.c
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1 /*
2  * Copyright (c) 2014 Lukasz Marek
3  *
4  * This file is part of FFmpeg.
5  *
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.
10  *
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.
15  *
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
19  */
20 
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.
24 
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29 #include <stddef.h>
30 
31 #include "config.h"
32 
33 #if HAVE_WINDOWS_H
34 #define WIN32_LEAN_AND_MEAN
35 #include <windows.h>
36 #endif
37 #if HAVE_OPENGL_GL3_H
38 #include <OpenGL/gl3.h>
39 #elif HAVE_ES2_GL_H
40 #include <ES2/gl.h>
41 #else
42 #include <GL/gl.h>
43 #include <GL/glext.h>
44 #endif
45 #if HAVE_GLXGETPROCADDRESS
46 #include <GL/glx.h>
47 #endif
48 
49 #if HAVE_SDL2
50 #include <SDL.h>
51 #endif
52 
53 #include "libavutil/common.h"
54 #include "libavutil/pixdesc.h"
55 #include "libavutil/log.h"
56 #include "libavutil/opt.h"
57 #include "libavutil/avassert.h"
58 #include "libavutil/avstring.h"
59 #include "libavformat/avformat.h"
60 #include "libavformat/internal.h"
61 #include "libavdevice/avdevice.h"
62 #include "opengl_enc_shaders.h"
63 
64 #ifndef APIENTRY
65 #define APIENTRY
66 #endif
67 
68 /* FF_GL_RED_COMPONENT is used for plannar pixel types.
69  * Only red component is sampled in shaders.
70  * On some platforms GL_RED is not available and GL_LUMINANCE have to be used,
71  * but since OpenGL 3.0 GL_LUMINANCE is deprecated.
72  * GL_RED produces RGBA = value, 0, 0, 1.
73  * GL_LUMINANCE produces RGBA = value, value, value, 1.
74  * Note: GL_INTENSITY may also be used which produce RGBA = value, value, value, value. */
75 #if defined(GL_RED)
76 #define FF_GL_RED_COMPONENT GL_RED
77 #elif defined(GL_LUMINANCE)
78 #define FF_GL_RED_COMPONENT GL_LUMINANCE
79 #else
80 #define FF_GL_RED_COMPONENT 0x1903; //GL_RED
81 #endif
82 
83 /* Constants not defined for iOS */
84 #define FF_GL_UNSIGNED_BYTE_3_3_2 0x8032
85 #define FF_GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
86 #define FF_GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
87 #define FF_GL_UNPACK_ROW_LENGTH 0x0CF2
88 
89 /* MinGW exposes only OpenGL 1.1 API */
90 #define FF_GL_ARRAY_BUFFER 0x8892
91 #define FF_GL_ELEMENT_ARRAY_BUFFER 0x8893
92 #define FF_GL_STATIC_DRAW 0x88E4
93 #define FF_GL_FRAGMENT_SHADER 0x8B30
94 #define FF_GL_VERTEX_SHADER 0x8B31
95 #define FF_GL_COMPILE_STATUS 0x8B81
96 #define FF_GL_LINK_STATUS 0x8B82
97 #define FF_GL_INFO_LOG_LENGTH 0x8B84
98 typedef void (APIENTRY *FF_PFNGLACTIVETEXTUREPROC) (GLenum texture);
99 typedef void (APIENTRY *FF_PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
100 typedef void (APIENTRY *FF_PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
101 typedef void (APIENTRY *FF_PFNGLBUFFERDATAPROC) (GLenum target, ptrdiff_t size, const GLvoid *data, GLenum usage);
102 typedef void (APIENTRY *FF_PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
103 typedef GLint (APIENTRY *FF_PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const char *name);
104 typedef void (APIENTRY *FF_PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
105 typedef void (APIENTRY *FF_PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, uintptr_t pointer);
106 typedef GLint (APIENTRY *FF_PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const char *name);
107 typedef void (APIENTRY *FF_PFNGLUNIFORM1FPROC) (GLint location, GLfloat v0);
108 typedef void (APIENTRY *FF_PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
109 typedef void (APIENTRY *FF_PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
110 typedef GLuint (APIENTRY *FF_PFNGLCREATEPROGRAMPROC) (void);
111 typedef void (APIENTRY *FF_PFNGLDELETEPROGRAMPROC) (GLuint program);
112 typedef void (APIENTRY *FF_PFNGLUSEPROGRAMPROC) (GLuint program);
113 typedef void (APIENTRY *FF_PFNGLLINKPROGRAMPROC) (GLuint program);
114 typedef void (APIENTRY *FF_PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
115 typedef void (APIENTRY *FF_PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, char *infoLog);
116 typedef void (APIENTRY *FF_PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
117 typedef GLuint (APIENTRY *FF_PFNGLCREATESHADERPROC) (GLenum type);
118 typedef void (APIENTRY *FF_PFNGLDELETESHADERPROC) (GLuint shader);
119 typedef void (APIENTRY *FF_PFNGLCOMPILESHADERPROC) (GLuint shader);
120 typedef void (APIENTRY *FF_PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const char* *string, const GLint *length);
121 typedef void (APIENTRY *FF_PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
122 typedef void (APIENTRY *FF_PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, char *infoLog);
123 
124 typedef struct FFOpenGLFunctions {
125  FF_PFNGLACTIVETEXTUREPROC glActiveTexture; //Require GL ARB multitexture
126  FF_PFNGLGENBUFFERSPROC glGenBuffers; //Require GL_ARB_vertex_buffer_object
127  FF_PFNGLDELETEBUFFERSPROC glDeleteBuffers; //Require GL_ARB_vertex_buffer_object
128  FF_PFNGLBUFFERDATAPROC glBufferData; //Require GL_ARB_vertex_buffer_object
129  FF_PFNGLBINDBUFFERPROC glBindBuffer; //Require GL_ARB_vertex_buffer_object
130  FF_PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation; //Require GL_ARB_vertex_shader
131  FF_PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray; //Require GL_ARB_vertex_shader
132  FF_PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer; //Require GL_ARB_vertex_shader
133  FF_PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation; //Require GL_ARB_shader_objects
134  FF_PFNGLUNIFORM1FPROC glUniform1f; //Require GL_ARB_shader_objects
135  FF_PFNGLUNIFORM1IPROC glUniform1i; //Require GL_ARB_shader_objects
136  FF_PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv; //Require GL_ARB_shader_objects
137  FF_PFNGLCREATEPROGRAMPROC glCreateProgram; //Require GL_ARB_shader_objects
138  FF_PFNGLDELETEPROGRAMPROC glDeleteProgram; //Require GL_ARB_shader_objects
139  FF_PFNGLUSEPROGRAMPROC glUseProgram; //Require GL_ARB_shader_objects
140  FF_PFNGLLINKPROGRAMPROC glLinkProgram; //Require GL_ARB_shader_objects
141  FF_PFNGLGETPROGRAMIVPROC glGetProgramiv; //Require GL_ARB_shader_objects
142  FF_PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog; //Require GL_ARB_shader_objects
143  FF_PFNGLATTACHSHADERPROC glAttachShader; //Require GL_ARB_shader_objects
144  FF_PFNGLCREATESHADERPROC glCreateShader; //Require GL_ARB_shader_objects
145  FF_PFNGLDELETESHADERPROC glDeleteShader; //Require GL_ARB_shader_objects
146  FF_PFNGLCOMPILESHADERPROC glCompileShader; //Require GL_ARB_shader_objects
147  FF_PFNGLSHADERSOURCEPROC glShaderSource; //Require GL_ARB_shader_objects
148  FF_PFNGLGETSHADERIVPROC glGetShaderiv; //Require GL_ARB_shader_objects
149  FF_PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog; //Require GL_ARB_shader_objects
150 } FFOpenGLFunctions;
151 
152 #define OPENGL_ERROR_CHECK(ctx) \
153 {\
154  GLenum err_code; \
155  if ((err_code = glGetError()) != GL_NO_ERROR) { \
156  av_log(ctx, AV_LOG_ERROR, "OpenGL error occurred in '%s', line %d: %d\n", __FUNCTION__, __LINE__, err_code); \
157  goto fail; \
158  } \
159 }\
160 
161 typedef struct OpenGLVertexInfo
162 {
163  float x, y, z; ///<Position
164  float s0, t0; ///<Texture coords
165 } OpenGLVertexInfo;
166 
167 /* defines 2 triangles to display */
168 static const GLushort g_index[6] =
169 {
170  0, 1, 2,
171  0, 3, 2,
172 };
173 
174 typedef struct OpenGLContext {
175  AVClass *class; ///< class for private options
176 
177 #if HAVE_SDL2
178  SDL_Window *window;
179  SDL_GLContext glcontext;
180 #endif
181  FFOpenGLFunctions glprocs;
182 
183  int inited; ///< Set to 1 when write_header was successfully called.
184  uint8_t background[4]; ///< Background color
185  int no_window; ///< 0 for create default window
186  char *window_title; ///< Title of the window
187 
188  /* OpenGL implementation limits */
189  GLint max_texture_size; ///< Maximum texture size
190  GLint max_viewport_width; ///< Maximum viewport size
191  GLint max_viewport_height; ///< Maximum viewport size
192  int non_pow_2_textures; ///< 1 when non power of 2 textures are supported
193  int unpack_subimage; ///< 1 when GL_EXT_unpack_subimage is available
194 
195  /* Current OpenGL configuration */
196  GLuint program; ///< Shader program
197  GLuint vertex_shader; ///< Vertex shader
198  GLuint fragment_shader; ///< Fragment shader for current pix_pmt
199  GLuint texture_name[4]; ///< Textures' IDs
200  GLuint index_buffer; ///< Index buffer
201  GLuint vertex_buffer; ///< Vertex buffer
202  OpenGLVertexInfo vertex[4]; ///< VBO
203  GLint projection_matrix_location; ///< Uniforms' locations
204  GLint model_view_matrix_location;
205  GLint color_map_location;
206  GLint chroma_div_w_location;
207  GLint chroma_div_h_location;
208  GLint texture_location[4];
209  GLint position_attrib; ///< Attibutes' locations
210  GLint texture_coords_attrib;
211 
212  GLfloat projection_matrix[16]; ///< Projection matrix
213  GLfloat model_view_matrix[16]; ///< Modev view matrix
214  GLfloat color_map[16]; ///< RGBA color map matrix
215  GLfloat chroma_div_w; ///< Chroma subsampling w ratio
216  GLfloat chroma_div_h; ///< Chroma subsampling h ratio
217 
218  /* Stream information */
219  GLenum format;
220  GLenum type;
221  int width; ///< Stream width
222  int height; ///< Stream height
223  enum AVPixelFormat pix_fmt; ///< Stream pixel format
224  int picture_width; ///< Rendered width
225  int picture_height; ///< Rendered height
226  int window_width;
227  int window_height;
228 } OpenGLContext;
229 
230 static const struct OpenGLFormatDesc {
231  enum AVPixelFormat fixel_format;
232  const char * const * fragment_shader;
233  GLenum format;
234  GLenum type;
235 } opengl_format_desc[] = {
236  { AV_PIX_FMT_YUV420P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
237  { AV_PIX_FMT_YUV444P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
238  { AV_PIX_FMT_YUV422P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
239  { AV_PIX_FMT_YUV410P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
240  { AV_PIX_FMT_YUV411P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
241  { AV_PIX_FMT_YUV440P, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
242  { AV_PIX_FMT_YUV420P16, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
243  { AV_PIX_FMT_YUV422P16, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
244  { AV_PIX_FMT_YUV444P16, &FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
245  { AV_PIX_FMT_YUVA420P, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
246  { AV_PIX_FMT_YUVA444P, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
247  { AV_PIX_FMT_YUVA422P, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
248  { AV_PIX_FMT_YUVA420P16, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
249  { AV_PIX_FMT_YUVA422P16, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
250  { AV_PIX_FMT_YUVA444P16, &FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
251  { AV_PIX_FMT_RGB24, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_BYTE },
252  { AV_PIX_FMT_BGR24, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_BYTE },
253  { AV_PIX_FMT_0RGB, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
254  { AV_PIX_FMT_RGB0, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
255  { AV_PIX_FMT_0BGR, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
256  { AV_PIX_FMT_BGR0, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
257  { AV_PIX_FMT_RGB565, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 },
258  { AV_PIX_FMT_BGR565, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 },
259  { AV_PIX_FMT_RGB555, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, FF_GL_UNSIGNED_SHORT_1_5_5_5_REV },
260  { AV_PIX_FMT_BGR555, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGBA, FF_GL_UNSIGNED_SHORT_1_5_5_5_REV },
261  { AV_PIX_FMT_RGB8, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, FF_GL_UNSIGNED_BYTE_3_3_2 },
262  { AV_PIX_FMT_BGR8, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, FF_GL_UNSIGNED_BYTE_2_3_3_REV },
263  { AV_PIX_FMT_RGB48, &FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET, GL_RGB, GL_UNSIGNED_SHORT },
264  { AV_PIX_FMT_ARGB, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
265  { AV_PIX_FMT_RGBA, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
266  { AV_PIX_FMT_ABGR, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
267  { AV_PIX_FMT_BGRA, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_BYTE },
268  { AV_PIX_FMT_RGBA64, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_SHORT },
269  { AV_PIX_FMT_BGRA64, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET, GL_RGBA, GL_UNSIGNED_SHORT },
270  { AV_PIX_FMT_GBRP, &FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
271  { AV_PIX_FMT_GBRP16, &FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
272  { AV_PIX_FMT_GBRAP, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
273  { AV_PIX_FMT_GBRAP16, &FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
274  { AV_PIX_FMT_GRAY8, &FF_OPENGL_FRAGMENT_SHADER_GRAY, FF_GL_RED_COMPONENT, GL_UNSIGNED_BYTE },
275  { AV_PIX_FMT_GRAY16, &FF_OPENGL_FRAGMENT_SHADER_GRAY, FF_GL_RED_COMPONENT, GL_UNSIGNED_SHORT },
276  { AV_PIX_FMT_NONE, NULL }
277 };
278 
279 static av_cold int opengl_prepare_vertex(AVFormatContext *s);
280 static int opengl_draw(AVFormatContext *h, void *intput, int repaint, int is_pkt);
281 static av_cold int opengl_init_context(OpenGLContext *opengl);
282 
283 static av_cold void opengl_deinit_context(OpenGLContext *opengl)
284 {
285  glDeleteTextures(4, opengl->texture_name);
286  opengl->texture_name[0] = opengl->texture_name[1] =
287  opengl->texture_name[2] = opengl->texture_name[3] = 0;
288  if (opengl->glprocs.glUseProgram)
289  opengl->glprocs.glUseProgram(0);
290  if (opengl->glprocs.glDeleteProgram) {
291  opengl->glprocs.glDeleteProgram(opengl->program);
292  opengl->program = 0;
293  }
294  if (opengl->glprocs.glDeleteShader) {
295  opengl->glprocs.glDeleteShader(opengl->vertex_shader);
296  opengl->glprocs.glDeleteShader(opengl->fragment_shader);
297  opengl->vertex_shader = opengl->fragment_shader = 0;
298  }
299  if (opengl->glprocs.glBindBuffer) {
300  opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, 0);
301  opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, 0);
302  }
303  if (opengl->glprocs.glDeleteBuffers) {
304  opengl->glprocs.glDeleteBuffers(2, &opengl->index_buffer);
305  opengl->vertex_buffer = opengl->index_buffer = 0;
306  }
307 }
308 
309 static int opengl_resize(AVFormatContext *h, int width, int height)
310 {
311  int ret = 0;
312  OpenGLContext *opengl = h->priv_data;
313  opengl->window_width = width;
314  opengl->window_height = height;
315  if (opengl->inited) {
316  if (opengl->no_window &&
317  (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
318  av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
319  goto end;
320  }
321  if ((ret = opengl_prepare_vertex(h)) < 0)
322  goto end;
323  ret = opengl_draw(h, NULL, 1, 0);
324  }
325  end:
326  return ret;
327 }
328 
329 static int opengl_control_message(AVFormatContext *h, int type, void *data, size_t data_size)
330 {
331  OpenGLContext *opengl = h->priv_data;
332  switch(type) {
333  case AV_APP_TO_DEV_WINDOW_SIZE:
334  if (data) {
335  AVDeviceRect *message = data;
336  return opengl_resize(h, message->width, message->height);
337  }
338  return AVERROR(EINVAL);
339  case AV_APP_TO_DEV_WINDOW_REPAINT:
340  return opengl_resize(h, opengl->window_width, opengl->window_height);
341  }
342  return AVERROR(ENOSYS);
343 }
344 
345 #if HAVE_SDL2
346 static int opengl_sdl_process_events(AVFormatContext *h)
347 {
348  OpenGLContext *opengl = h->priv_data;
349  AVDeviceRect message;
350  SDL_Event event;
351  SDL_PumpEvents();
352  while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT) > 0) {
353  switch (event.type) {
354  case SDL_QUIT:
355  return AVERROR(EIO);
356  case SDL_KEYDOWN:
357  switch (event.key.keysym.sym) {
358  case SDLK_ESCAPE:
359  case SDLK_q:
360  return AVERROR(EIO);
361  }
362  return 0;
363  case SDL_WINDOWEVENT:
364  switch(event.window.event) {
365  case SDL_WINDOWEVENT_RESIZED:
366  case SDL_WINDOWEVENT_SIZE_CHANGED:
367  SDL_GL_GetDrawableSize(opengl->window, &message.width, &message.height);
368  return opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
369  default:
370  break;
371  }
372  }
373  }
374  return 0;
375 }
376 
377 static int av_cold opengl_sdl_create_window(AVFormatContext *h)
378 {
379  OpenGLContext *opengl = h->priv_data;
380  AVDeviceRect message;
381  if (SDL_Init(SDL_INIT_VIDEO)) {
382  av_log(opengl, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError());
383  return AVERROR_EXTERNAL;
384  }
385  opengl->window = SDL_CreateWindow(opengl->window_title,
386  SDL_WINDOWPOS_UNDEFINED,
387  SDL_WINDOWPOS_UNDEFINED,
388  opengl->window_width, opengl->window_height,
389  SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL);
390  if (!opengl->window) {
391  av_log(opengl, AV_LOG_ERROR, "Unable to create default window: %s\n", SDL_GetError());
392  return AVERROR_EXTERNAL;
393  }
394  opengl->glcontext = SDL_GL_CreateContext(opengl->window);
395  if (!opengl->glcontext) {
396  av_log(opengl, AV_LOG_ERROR, "Unable to create OpenGL context on default window: %s\n", SDL_GetError());
397  return AVERROR_EXTERNAL;
398  }
399  SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
400  SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
401  SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
402  SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
403  SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
404  av_log(opengl, AV_LOG_INFO, "SDL driver: '%s'.\n", SDL_GetCurrentVideoDriver());
405  SDL_GL_GetDrawableSize(opengl->window, &message.width, &message.height);
406  return opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
407 }
408 
409 static int av_cold opengl_sdl_load_procedures(OpenGLContext *opengl)
410 {
411  FFOpenGLFunctions *procs = &opengl->glprocs;
412 
413 #define LOAD_OPENGL_FUN(name, type) \
414  procs->name = (type)SDL_GL_GetProcAddress(#name); \
415  if (!procs->name) { \
416  av_log(opengl, AV_LOG_ERROR, "Cannot load OpenGL function: '%s'\n", #name); \
417  return AVERROR(ENOSYS); \
418  }
419 
420  LOAD_OPENGL_FUN(glActiveTexture, FF_PFNGLACTIVETEXTUREPROC)
421  LOAD_OPENGL_FUN(glGenBuffers, FF_PFNGLGENBUFFERSPROC)
422  LOAD_OPENGL_FUN(glDeleteBuffers, FF_PFNGLDELETEBUFFERSPROC)
423  LOAD_OPENGL_FUN(glBufferData, FF_PFNGLBUFFERDATAPROC)
424  LOAD_OPENGL_FUN(glBindBuffer, FF_PFNGLBINDBUFFERPROC)
425  LOAD_OPENGL_FUN(glGetAttribLocation, FF_PFNGLGETATTRIBLOCATIONPROC)
426  LOAD_OPENGL_FUN(glGetUniformLocation, FF_PFNGLGETUNIFORMLOCATIONPROC)
427  LOAD_OPENGL_FUN(glUniform1f, FF_PFNGLUNIFORM1FPROC)
428  LOAD_OPENGL_FUN(glUniform1i, FF_PFNGLUNIFORM1IPROC)
429  LOAD_OPENGL_FUN(glUniformMatrix4fv, FF_PFNGLUNIFORMMATRIX4FVPROC)
430  LOAD_OPENGL_FUN(glCreateProgram, FF_PFNGLCREATEPROGRAMPROC)
431  LOAD_OPENGL_FUN(glDeleteProgram, FF_PFNGLDELETEPROGRAMPROC)
432  LOAD_OPENGL_FUN(glUseProgram, FF_PFNGLUSEPROGRAMPROC)
433  LOAD_OPENGL_FUN(glLinkProgram, FF_PFNGLLINKPROGRAMPROC)
434  LOAD_OPENGL_FUN(glGetProgramiv, FF_PFNGLGETPROGRAMIVPROC)
435  LOAD_OPENGL_FUN(glGetProgramInfoLog, FF_PFNGLGETPROGRAMINFOLOGPROC)
436  LOAD_OPENGL_FUN(glAttachShader, FF_PFNGLATTACHSHADERPROC)
437  LOAD_OPENGL_FUN(glCreateShader, FF_PFNGLCREATESHADERPROC)
438  LOAD_OPENGL_FUN(glDeleteShader, FF_PFNGLDELETESHADERPROC)
439  LOAD_OPENGL_FUN(glCompileShader, FF_PFNGLCOMPILESHADERPROC)
440  LOAD_OPENGL_FUN(glShaderSource, FF_PFNGLSHADERSOURCEPROC)
441  LOAD_OPENGL_FUN(glGetShaderiv, FF_PFNGLGETSHADERIVPROC)
442  LOAD_OPENGL_FUN(glGetShaderInfoLog, FF_PFNGLGETSHADERINFOLOGPROC)
443  LOAD_OPENGL_FUN(glEnableVertexAttribArray, FF_PFNGLENABLEVERTEXATTRIBARRAYPROC)
444  LOAD_OPENGL_FUN(glVertexAttribPointer, FF_PFNGLVERTEXATTRIBPOINTERPROC)
445 
446  return 0;
447 
448 #undef LOAD_OPENGL_FUN
449 }
450 #endif /* HAVE_SDL2 */
451 
452 #if defined(__APPLE__)
453 static int av_cold opengl_load_procedures(OpenGLContext *opengl)
454 {
455  FFOpenGLFunctions *procs = &opengl->glprocs;
456 
457 #if HAVE_SDL2
458  if (!opengl->no_window)
459  return opengl_sdl_load_procedures(opengl);
460 #endif
461 
462  procs->glActiveTexture = glActiveTexture;
463  procs->glGenBuffers = glGenBuffers;
464  procs->glDeleteBuffers = glDeleteBuffers;
465  procs->glBufferData = glBufferData;
466  procs->glBindBuffer = glBindBuffer;
467  procs->glGetAttribLocation = glGetAttribLocation;
468  procs->glGetUniformLocation = glGetUniformLocation;
469  procs->glUniform1f = glUniform1f;
470  procs->glUniform1i = glUniform1i;
471  procs->glUniformMatrix4fv = glUniformMatrix4fv;
472  procs->glCreateProgram = glCreateProgram;
473  procs->glDeleteProgram = glDeleteProgram;
474  procs->glUseProgram = glUseProgram;
475  procs->glLinkProgram = glLinkProgram;
476  procs->glGetProgramiv = glGetProgramiv;
477  procs->glGetProgramInfoLog = glGetProgramInfoLog;
478  procs->glAttachShader = glAttachShader;
479  procs->glCreateShader = glCreateShader;
480  procs->glDeleteShader = glDeleteShader;
481  procs->glCompileShader = glCompileShader;
482  procs->glShaderSource = glShaderSource;
483  procs->glGetShaderiv = glGetShaderiv;
484  procs->glGetShaderInfoLog = glGetShaderInfoLog;
485  procs->glEnableVertexAttribArray = glEnableVertexAttribArray;
486  procs->glVertexAttribPointer = (FF_PFNGLVERTEXATTRIBPOINTERPROC) glVertexAttribPointer;
487  return 0;
488 }
489 #else
490 static int av_cold opengl_load_procedures(OpenGLContext *opengl)
491 {
492  FFOpenGLFunctions *procs = &opengl->glprocs;
493 
494 #if HAVE_GLXGETPROCADDRESS
495 #define SelectedGetProcAddress glXGetProcAddress
496 #elif HAVE_WGLGETPROCADDRESS
497 #define SelectedGetProcAddress wglGetProcAddress
498 #endif
499 
500 #define LOAD_OPENGL_FUN(name, type) \
501  procs->name = (type)SelectedGetProcAddress(#name); \
502  if (!procs->name) { \
503  av_log(opengl, AV_LOG_ERROR, "Cannot load OpenGL function: '%s'\n", #name); \
504  return AVERROR(ENOSYS); \
505  }
506 
507 #if HAVE_SDL2
508  if (!opengl->no_window)
509  return opengl_sdl_load_procedures(opengl);
510 #endif
511 
512  LOAD_OPENGL_FUN(glActiveTexture, FF_PFNGLACTIVETEXTUREPROC)
513  LOAD_OPENGL_FUN(glGenBuffers, FF_PFNGLGENBUFFERSPROC)
514  LOAD_OPENGL_FUN(glDeleteBuffers, FF_PFNGLDELETEBUFFERSPROC)
515  LOAD_OPENGL_FUN(glBufferData, FF_PFNGLBUFFERDATAPROC)
516  LOAD_OPENGL_FUN(glBindBuffer, FF_PFNGLBINDBUFFERPROC)
517  LOAD_OPENGL_FUN(glGetAttribLocation, FF_PFNGLGETATTRIBLOCATIONPROC)
518  LOAD_OPENGL_FUN(glGetUniformLocation, FF_PFNGLGETUNIFORMLOCATIONPROC)
519  LOAD_OPENGL_FUN(glUniform1f, FF_PFNGLUNIFORM1FPROC)
520  LOAD_OPENGL_FUN(glUniform1i, FF_PFNGLUNIFORM1IPROC)
521  LOAD_OPENGL_FUN(glUniformMatrix4fv, FF_PFNGLUNIFORMMATRIX4FVPROC)
522  LOAD_OPENGL_FUN(glCreateProgram, FF_PFNGLCREATEPROGRAMPROC)
523  LOAD_OPENGL_FUN(glDeleteProgram, FF_PFNGLDELETEPROGRAMPROC)
524  LOAD_OPENGL_FUN(glUseProgram, FF_PFNGLUSEPROGRAMPROC)
525  LOAD_OPENGL_FUN(glLinkProgram, FF_PFNGLLINKPROGRAMPROC)
526  LOAD_OPENGL_FUN(glGetProgramiv, FF_PFNGLGETPROGRAMIVPROC)
527  LOAD_OPENGL_FUN(glGetProgramInfoLog, FF_PFNGLGETPROGRAMINFOLOGPROC)
528  LOAD_OPENGL_FUN(glAttachShader, FF_PFNGLATTACHSHADERPROC)
529  LOAD_OPENGL_FUN(glCreateShader, FF_PFNGLCREATESHADERPROC)
530  LOAD_OPENGL_FUN(glDeleteShader, FF_PFNGLDELETESHADERPROC)
531  LOAD_OPENGL_FUN(glCompileShader, FF_PFNGLCOMPILESHADERPROC)
532  LOAD_OPENGL_FUN(glShaderSource, FF_PFNGLSHADERSOURCEPROC)
533  LOAD_OPENGL_FUN(glGetShaderiv, FF_PFNGLGETSHADERIVPROC)
534  LOAD_OPENGL_FUN(glGetShaderInfoLog, FF_PFNGLGETSHADERINFOLOGPROC)
535  LOAD_OPENGL_FUN(glEnableVertexAttribArray, FF_PFNGLENABLEVERTEXATTRIBARRAYPROC)
536  LOAD_OPENGL_FUN(glVertexAttribPointer, FF_PFNGLVERTEXATTRIBPOINTERPROC)
537 
538  return 0;
539 
540 #undef SelectedGetProcAddress
541 #undef LOAD_OPENGL_FUN
542 }
543 #endif
544 
545 static void opengl_make_identity(float matrix[16])
546 {
547  memset(matrix, 0, 16 * sizeof(float));
548  matrix[0] = matrix[5] = matrix[10] = matrix[15] = 1.0f;
549 }
550 
551 static void opengl_make_ortho(float matrix[16], float left, float right,
552  float bottom, float top, float nearZ, float farZ)
553 {
554  float ral = right + left;
555  float rsl = right - left;
556  float tab = top + bottom;
557  float tsb = top - bottom;
558  float fan = farZ + nearZ;
559  float fsn = farZ - nearZ;
560 
561  memset(matrix, 0, 16 * sizeof(float));
562  matrix[0] = 2.0f / rsl;
563  matrix[5] = 2.0f / tsb;
564  matrix[10] = -2.0f / fsn;
565  matrix[12] = -ral / rsl;
566  matrix[13] = -tab / tsb;
567  matrix[14] = -fan / fsn;
568  matrix[15] = 1.0f;
569 }
570 
571 static av_cold int opengl_read_limits(OpenGLContext *opengl)
572 {
573  static const struct{
574  const char *extension;
575  int major;
576  int minor;
577  } required_extensions[] = {
578  { "GL_ARB_multitexture", 1, 3 },
579  { "GL_ARB_vertex_buffer_object", 1, 5 }, //GLX_ARB_vertex_buffer_object
580  { "GL_ARB_vertex_shader", 2, 0 },
581  { "GL_ARB_fragment_shader", 2, 0 },
582  { "GL_ARB_shader_objects", 2, 0 },
583  { NULL, 0, 0 }
584  };
585  int i, major, minor;
586  const char *extensions, *version;
587 
588  version = glGetString(GL_VERSION);
589  extensions = glGetString(GL_EXTENSIONS);
590 
591  av_log(opengl, AV_LOG_DEBUG, "OpenGL version: %s\n", version);
592  sscanf(version, "%d.%d", &major, &minor);
593 
594  for (i = 0; required_extensions[i].extension; i++) {
595  if (major < required_extensions[i].major &&
596  (major == required_extensions[i].major && minor < required_extensions[i].minor) &&
597  !strstr(extensions, required_extensions[i].extension)) {
598  av_log(opengl, AV_LOG_ERROR, "Required extension %s is not supported.\n",
599  required_extensions[i].extension);
600  av_log(opengl, AV_LOG_DEBUG, "Supported extensions are: %s\n", extensions);
601  return AVERROR(ENOSYS);
602  }
603  }
604  glGetIntegerv(GL_MAX_TEXTURE_SIZE, &opengl->max_texture_size);
605  glGetIntegerv(GL_MAX_VIEWPORT_DIMS, &opengl->max_viewport_width);
606  opengl->non_pow_2_textures = major >= 2 || strstr(extensions, "GL_ARB_texture_non_power_of_two");
607 #if defined(GL_ES_VERSION_2_0)
608  opengl->unpack_subimage = !!strstr(extensions, "GL_EXT_unpack_subimage");
609 #else
610  opengl->unpack_subimage = 1;
611 #endif
612 
613  av_log(opengl, AV_LOG_DEBUG, "Non Power of 2 textures support: %s\n", opengl->non_pow_2_textures ? "Yes" : "No");
614  av_log(opengl, AV_LOG_DEBUG, "Unpack Subimage extension support: %s\n", opengl->unpack_subimage ? "Yes" : "No");
615  av_log(opengl, AV_LOG_DEBUG, "Max texture size: %dx%d\n", opengl->max_texture_size, opengl->max_texture_size);
616  av_log(opengl, AV_LOG_DEBUG, "Max viewport size: %dx%d\n",
617  opengl->max_viewport_width, opengl->max_viewport_height);
618 
619  OPENGL_ERROR_CHECK(opengl);
620  return 0;
621  fail:
622  return AVERROR_EXTERNAL;
623 }
624 
625 static const char* opengl_get_fragment_shader_code(enum AVPixelFormat format)
626 {
627  int i;
628  for (i = 0; i < FF_ARRAY_ELEMS(opengl_format_desc); i++) {
629  if (opengl_format_desc[i].fixel_format == format)
630  return *opengl_format_desc[i].fragment_shader;
631  }
632  return NULL;
633 }
634 
635 static int opengl_type_size(GLenum type)
636 {
637  switch(type) {
638  case GL_UNSIGNED_SHORT:
639  case FF_GL_UNSIGNED_SHORT_1_5_5_5_REV:
640  case GL_UNSIGNED_SHORT_5_6_5:
641  return 2;
642  case GL_UNSIGNED_BYTE:
643  case FF_GL_UNSIGNED_BYTE_3_3_2:
644  case FF_GL_UNSIGNED_BYTE_2_3_3_REV:
645  default:
646  break;
647  }
648  return 1;
649 }
650 
651 static av_cold void opengl_get_texture_params(OpenGLContext *opengl)
652 {
653  int i;
654  for (i = 0; i < FF_ARRAY_ELEMS(opengl_format_desc); i++) {
655  if (opengl_format_desc[i].fixel_format == opengl->pix_fmt) {
656  opengl->format = opengl_format_desc[i].format;
657  opengl->type = opengl_format_desc[i].type;
658  break;
659  }
660  }
661 }
662 
663 static void opengl_compute_display_area(AVFormatContext *s)
664 {
665  AVRational sar, dar; /* sample and display aspect ratios */
666  OpenGLContext *opengl = s->priv_data;
667  AVStream *st = s->streams[0];
668  AVCodecParameters *par = st->codecpar;
669 
670  /* compute overlay width and height from the codec context information */
671  sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 };
672  dar = av_mul_q(sar, (AVRational){ par->width, par->height });
673 
674  /* we suppose the screen has a 1/1 sample aspect ratio */
675  /* fit in the window */
676  if (av_cmp_q(dar, (AVRational){ opengl->window_width, opengl->window_height }) > 0) {
677  /* fit in width */
678  opengl->picture_width = opengl->window_width;
679  opengl->picture_height = av_rescale(opengl->picture_width, dar.den, dar.num);
680  } else {
681  /* fit in height */
682  opengl->picture_height = opengl->window_height;
683  opengl->picture_width = av_rescale(opengl->picture_height, dar.num, dar.den);
684  }
685 }
686 
687 static av_cold void opengl_get_texture_size(OpenGLContext *opengl, int in_width, int in_height,
688  int *out_width, int *out_height)
689 {
690  if (opengl->non_pow_2_textures) {
691  *out_width = in_width;
692  *out_height = in_height;
693  } else {
694  int max = FFMIN(FFMAX(in_width, in_height), opengl->max_texture_size);
695  unsigned power_of_2 = 1;
696  while (power_of_2 < max)
697  power_of_2 *= 2;
698  *out_height = power_of_2;
699  *out_width = power_of_2;
700  av_log(opengl, AV_LOG_DEBUG, "Texture size calculated from %dx%d into %dx%d\n",
701  in_width, in_height, *out_width, *out_height);
702  }
703 }
704 
705 static av_cold void opengl_fill_color_map(OpenGLContext *opengl)
706 {
707  const AVPixFmtDescriptor *desc;
708  int shift;
709  enum AVPixelFormat pix_fmt = opengl->pix_fmt;
710 
711  /* We need order of components, not exact position, some minor HACKs here */
712  if (pix_fmt == AV_PIX_FMT_RGB565 || pix_fmt == AV_PIX_FMT_BGR555 ||
713  pix_fmt == AV_PIX_FMT_BGR8 || pix_fmt == AV_PIX_FMT_RGB8)
714  pix_fmt = AV_PIX_FMT_RGB24;
715  else if (pix_fmt == AV_PIX_FMT_BGR565 || pix_fmt == AV_PIX_FMT_RGB555)
716  pix_fmt = AV_PIX_FMT_BGR24;
717 
718  desc = av_pix_fmt_desc_get(pix_fmt);
719  if (!(desc->flags & AV_PIX_FMT_FLAG_RGB))
720  return;
721 
722 #define FILL_COMPONENT(i) { \
723  shift = (desc->comp[i].depth - 1) >> 3; \
724  opengl->color_map[(i << 2) + (desc->comp[i].offset >> shift)] = 1.0; \
725  }
726 
727  memset(opengl->color_map, 0, sizeof(opengl->color_map));
728  FILL_COMPONENT(0);
729  FILL_COMPONENT(1);
730  FILL_COMPONENT(2);
731  if (desc->flags & AV_PIX_FMT_FLAG_ALPHA)
732  FILL_COMPONENT(3);
733 
734 #undef FILL_COMPONENT
735 }
736 
737 static av_cold GLuint opengl_load_shader(OpenGLContext *opengl, GLenum type, const char *source)
738 {
739  GLuint shader = opengl->glprocs.glCreateShader(type);
740  GLint result;
741  if (!shader) {
742  av_log(opengl, AV_LOG_ERROR, "glCreateShader() failed\n");
743  return 0;
744  }
745  opengl->glprocs.glShaderSource(shader, 1, &source, NULL);
746  opengl->glprocs.glCompileShader(shader);
747 
748  opengl->glprocs.glGetShaderiv(shader, FF_GL_COMPILE_STATUS, &result);
749  if (!result) {
750  char *log;
751  opengl->glprocs.glGetShaderiv(shader, FF_GL_INFO_LOG_LENGTH, &result);
752  if (result) {
753  if ((log = av_malloc(result))) {
754  opengl->glprocs.glGetShaderInfoLog(shader, result, NULL, log);
755  av_log(opengl, AV_LOG_ERROR, "Compile error: %s\n", log);
756  av_free(log);
757  }
758  }
759  goto fail;
760  }
761  OPENGL_ERROR_CHECK(opengl);
762  return shader;
763  fail:
764  opengl->glprocs.glDeleteShader(shader);
765  return 0;
766 }
767 
768 static av_cold int opengl_compile_shaders(OpenGLContext *opengl, enum AVPixelFormat pix_fmt)
769 {
770  GLint result;
771  const char *fragment_shader_code = opengl_get_fragment_shader_code(pix_fmt);
772 
773  if (!fragment_shader_code) {
774  av_log(opengl, AV_LOG_ERROR, "Provided pixel format '%s' is not supported\n",
775  av_get_pix_fmt_name(pix_fmt));
776  return AVERROR(EINVAL);
777  }
778 
779  opengl->vertex_shader = opengl_load_shader(opengl, FF_GL_VERTEX_SHADER,
780  FF_OPENGL_VERTEX_SHADER);
781  if (!opengl->vertex_shader) {
782  av_log(opengl, AV_LOG_ERROR, "Vertex shader loading failed.\n");
783  goto fail;
784  }
785  opengl->fragment_shader = opengl_load_shader(opengl, FF_GL_FRAGMENT_SHADER,
786  fragment_shader_code);
787  if (!opengl->fragment_shader) {
788  av_log(opengl, AV_LOG_ERROR, "Fragment shader loading failed.\n");
789  goto fail;
790  }
791 
792  opengl->program = opengl->glprocs.glCreateProgram();
793  if (!opengl->program)
794  goto fail;
795 
796  opengl->glprocs.glAttachShader(opengl->program, opengl->vertex_shader);
797  opengl->glprocs.glAttachShader(opengl->program, opengl->fragment_shader);
798  opengl->glprocs.glLinkProgram(opengl->program);
799 
800  opengl->glprocs.glGetProgramiv(opengl->program, FF_GL_LINK_STATUS, &result);
801  if (!result) {
802  char *log;
803  opengl->glprocs.glGetProgramiv(opengl->program, FF_GL_INFO_LOG_LENGTH, &result);
804  if (result) {
805  log = av_malloc(result);
806  if (!log)
807  goto fail;
808  opengl->glprocs.glGetProgramInfoLog(opengl->program, result, NULL, log);
809  av_log(opengl, AV_LOG_ERROR, "Link error: %s\n", log);
810  av_free(log);
811  }
812  goto fail;
813  }
814 
815  opengl->position_attrib = opengl->glprocs.glGetAttribLocation(opengl->program, "a_position");
816  opengl->texture_coords_attrib = opengl->glprocs.glGetAttribLocation(opengl->program, "a_textureCoords");
817  opengl->projection_matrix_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_projectionMatrix");
818  opengl->model_view_matrix_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_modelViewMatrix");
819  opengl->color_map_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_colorMap");
820  opengl->texture_location[0] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture0");
821  opengl->texture_location[1] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture1");
822  opengl->texture_location[2] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture2");
823  opengl->texture_location[3] = opengl->glprocs.glGetUniformLocation(opengl->program, "u_texture3");
824  opengl->chroma_div_w_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_chroma_div_w");
825  opengl->chroma_div_h_location = opengl->glprocs.glGetUniformLocation(opengl->program, "u_chroma_div_h");
826 
827  OPENGL_ERROR_CHECK(opengl);
828  return 0;
829  fail:
830  opengl->glprocs.glDeleteShader(opengl->vertex_shader);
831  opengl->glprocs.glDeleteShader(opengl->fragment_shader);
832  opengl->glprocs.glDeleteProgram(opengl->program);
833  opengl->fragment_shader = opengl->vertex_shader = opengl->program = 0;
834  return AVERROR_EXTERNAL;
835 }
836 
837 static av_cold int opengl_configure_texture(OpenGLContext *opengl, GLuint texture,
838  GLsizei width, GLsizei height)
839 {
840  if (texture) {
841  int new_width, new_height;
842  opengl_get_texture_size(opengl, width, height, &new_width, &new_height);
843  glBindTexture(GL_TEXTURE_2D, texture);
844  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
845  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
846  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
847  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
848  glTexImage2D(GL_TEXTURE_2D, 0, opengl->format, new_width, new_height, 0,
849  opengl->format, opengl->type, NULL);
850  OPENGL_ERROR_CHECK(NULL);
851  }
852  return 0;
853  fail:
854  return AVERROR_EXTERNAL;
855 }
856 
857 static av_cold int opengl_prepare_vertex(AVFormatContext *s)
858 {
859  OpenGLContext *opengl = s->priv_data;
860  int tex_w, tex_h;
861 
862  if (opengl->window_width > opengl->max_viewport_width || opengl->window_height > opengl->max_viewport_height) {
863  opengl->window_width = FFMIN(opengl->window_width, opengl->max_viewport_width);
864  opengl->window_height = FFMIN(opengl->window_height, opengl->max_viewport_height);
865  av_log(opengl, AV_LOG_WARNING, "Too big viewport requested, limited to %dx%d", opengl->window_width, opengl->window_height);
866  }
867  glViewport(0, 0, opengl->window_width, opengl->window_height);
868  opengl_make_ortho(opengl->projection_matrix,
869  - (float)opengl->window_width / 2.0f, (float)opengl->window_width / 2.0f,
870  - (float)opengl->window_height / 2.0f, (float)opengl->window_height / 2.0f,
871  1.0f, -1.0f);
872  opengl_make_identity(opengl->model_view_matrix);
873 
874  opengl_compute_display_area(s);
875 
876  opengl->vertex[0].z = opengl->vertex[1].z = opengl->vertex[2].z = opengl->vertex[3].z = 0.0f;
877  opengl->vertex[0].x = opengl->vertex[1].x = - (float)opengl->picture_width / 2.0f;
878  opengl->vertex[2].x = opengl->vertex[3].x = (float)opengl->picture_width / 2.0f;
879  opengl->vertex[1].y = opengl->vertex[2].y = - (float)opengl->picture_height / 2.0f;
880  opengl->vertex[0].y = opengl->vertex[3].y = (float)opengl->picture_height / 2.0f;
881 
882  opengl_get_texture_size(opengl, opengl->width, opengl->height, &tex_w, &tex_h);
883 
884  opengl->vertex[0].s0 = 0.0f;
885  opengl->vertex[0].t0 = 0.0f;
886  opengl->vertex[1].s0 = 0.0f;
887  opengl->vertex[1].t0 = (float)opengl->height / (float)tex_h;
888  opengl->vertex[2].s0 = (float)opengl->width / (float)tex_w;
889  opengl->vertex[2].t0 = (float)opengl->height / (float)tex_h;
890  opengl->vertex[3].s0 = (float)opengl->width / (float)tex_w;
891  opengl->vertex[3].t0 = 0.0f;
892 
893  opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, opengl->vertex_buffer);
894  opengl->glprocs.glBufferData(FF_GL_ARRAY_BUFFER, sizeof(opengl->vertex), opengl->vertex, FF_GL_STATIC_DRAW);
895  opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, 0);
896  OPENGL_ERROR_CHECK(opengl);
897  return 0;
898  fail:
899  return AVERROR_EXTERNAL;
900 }
901 
902 static int opengl_prepare(OpenGLContext *opengl)
903 {
904  int i;
905  opengl->glprocs.glUseProgram(opengl->program);
906  opengl->glprocs.glUniformMatrix4fv(opengl->projection_matrix_location, 1, GL_FALSE, opengl->projection_matrix);
907  opengl->glprocs.glUniformMatrix4fv(opengl->model_view_matrix_location, 1, GL_FALSE, opengl->model_view_matrix);
908  for (i = 0; i < 4; i++)
909  if (opengl->texture_location[i] != -1) {
910  opengl->glprocs.glActiveTexture(GL_TEXTURE0 + i);
911  glBindTexture(GL_TEXTURE_2D, opengl->texture_name[i]);
912  opengl->glprocs.glUniform1i(opengl->texture_location[i], i);
913  }
914  if (opengl->color_map_location != -1)
915  opengl->glprocs.glUniformMatrix4fv(opengl->color_map_location, 1, GL_FALSE, opengl->color_map);
916  if (opengl->chroma_div_h_location != -1)
917  opengl->glprocs.glUniform1f(opengl->chroma_div_h_location, opengl->chroma_div_h);
918  if (opengl->chroma_div_w_location != -1)
919  opengl->glprocs.glUniform1f(opengl->chroma_div_w_location, opengl->chroma_div_w);
920 
921  OPENGL_ERROR_CHECK(opengl);
922  return 0;
923  fail:
924  return AVERROR_EXTERNAL;
925 }
926 
927 static int opengl_create_window(AVFormatContext *h)
928 {
929  OpenGLContext *opengl = h->priv_data;
930  int ret;
931 
932  if (!opengl->no_window) {
933 #if HAVE_SDL2
934  if ((ret = opengl_sdl_create_window(h)) < 0) {
935  av_log(opengl, AV_LOG_ERROR, "Cannot create default SDL window.\n");
936  return ret;
937  }
938 #else
939  av_log(opengl, AV_LOG_ERROR, "FFmpeg is compiled without SDL. Cannot create default window.\n");
940  return AVERROR(ENOSYS);
941 #endif
942  } else {
943  AVDeviceRect message;
944  message.x = message.y = 0;
945  message.width = opengl->window_width;
946  message.height = opengl->window_height;
947  if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_CREATE_WINDOW_BUFFER,
948  &message , sizeof(message))) < 0) {
949  av_log(opengl, AV_LOG_ERROR, "Application failed to create window buffer.\n");
950  return ret;
951  }
952  if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
953  av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
954  return ret;
955  }
956  }
957  return 0;
958 }
959 
960 static int opengl_release_window(AVFormatContext *h)
961 {
962  int ret;
963  OpenGLContext *opengl = h->priv_data;
964  if (!opengl->no_window) {
965 #if HAVE_SDL2
966  SDL_GL_DeleteContext(opengl->glcontext);
967  SDL_DestroyWindow(opengl->window);
968  SDL_Quit();
969 #endif
970  } else if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER, NULL , 0)) < 0) {
971  av_log(opengl, AV_LOG_ERROR, "Application failed to release window buffer.\n");
972  return ret;
973  }
974  return 0;
975 }
976 
977 static av_cold int opengl_write_trailer(AVFormatContext *h)
978 {
979  OpenGLContext *opengl = h->priv_data;
980 
981  if (opengl->no_window &&
982  avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0) < 0)
983  av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
984 
985  opengl_deinit_context(opengl);
986  opengl_release_window(h);
987 
988  return 0;
989 }
990 
991 static av_cold int opengl_init_context(OpenGLContext *opengl)
992 {
993  int i, ret;
994  const AVPixFmtDescriptor *desc;
995 
996  if ((ret = opengl_compile_shaders(opengl, opengl->pix_fmt)) < 0)
997  goto fail;
998 
999  desc = av_pix_fmt_desc_get(opengl->pix_fmt);
1000  av_assert0(desc->nb_components > 0 && desc->nb_components <= 4);
1001  glGenTextures(desc->nb_components, opengl->texture_name);
1002 
1003  opengl->glprocs.glGenBuffers(2, &opengl->index_buffer);
1004  if (!opengl->index_buffer || !opengl->vertex_buffer) {
1005  av_log(opengl, AV_LOG_ERROR, "Buffer generation failed.\n");
1006  ret = AVERROR_EXTERNAL;
1007  goto fail;
1008  }
1009 
1010  opengl_configure_texture(opengl, opengl->texture_name[0], opengl->width, opengl->height);
1011  if (desc->nb_components > 1) {
1012  int has_alpha = desc->flags & AV_PIX_FMT_FLAG_ALPHA;
1013  int num_planes = desc->nb_components - (has_alpha ? 1 : 0);
1014  if (opengl->non_pow_2_textures) {
1015  opengl->chroma_div_w = 1.0f;
1016  opengl->chroma_div_h = 1.0f;
1017  } else {
1018  opengl->chroma_div_w = 1 << desc->log2_chroma_w;
1019  opengl->chroma_div_h = 1 << desc->log2_chroma_h;
1020  }
1021  for (i = 1; i < num_planes; i++)
1022  if (opengl->non_pow_2_textures)
1023  opengl_configure_texture(opengl, opengl->texture_name[i],
1024  AV_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w),
1025  AV_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h));
1026  else
1027  opengl_configure_texture(opengl, opengl->texture_name[i], opengl->width, opengl->height);
1028  if (has_alpha)
1029  opengl_configure_texture(opengl, opengl->texture_name[3], opengl->width, opengl->height);
1030  }
1031 
1032  opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, opengl->index_buffer);
1033  opengl->glprocs.glBufferData(FF_GL_ELEMENT_ARRAY_BUFFER, sizeof(g_index), g_index, FF_GL_STATIC_DRAW);
1034  opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, 0);
1035 
1036  glEnable(GL_BLEND);
1037  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1038 
1039  glClearColor((float)opengl->background[0] / 255.0f, (float)opengl->background[1] / 255.0f,
1040  (float)opengl->background[2] / 255.0f, 1.0f);
1041 
1042  ret = AVERROR_EXTERNAL;
1043  OPENGL_ERROR_CHECK(opengl);
1044 
1045  return 0;
1046  fail:
1047  return ret;
1048 }
1049 
1050 static av_cold int opengl_write_header(AVFormatContext *h)
1051 {
1052  OpenGLContext *opengl = h->priv_data;
1053  AVStream *st;
1054  int ret;
1055 
1056  if (h->nb_streams != 1 ||
1057  h->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO ||
1058  h->streams[0]->codecpar->codec_id != AV_CODEC_ID_RAWVIDEO) {
1059  av_log(opengl, AV_LOG_ERROR, "Only a single video stream is supported.\n");
1060  return AVERROR(EINVAL);
1061  }
1062  st = h->streams[0];
1063  opengl->width = st->codecpar->width;
1064  opengl->height = st->codecpar->height;
1065  opengl->pix_fmt = st->codecpar->format;
1066  if (!opengl->window_width)
1067  opengl->window_width = opengl->width;
1068  if (!opengl->window_height)
1069  opengl->window_height = opengl->height;
1070 
1071  if (!opengl->window_title && !opengl->no_window)
1072  opengl->window_title = av_strdup(h->filename);
1073 
1074  if ((ret = opengl_create_window(h)))
1075  goto fail;
1076 
1077  if ((ret = opengl_read_limits(opengl)) < 0)
1078  goto fail;
1079 
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);
1084  goto fail;
1085  }
1086 
1087  if ((ret = opengl_load_procedures(opengl)) < 0)
1088  goto fail;
1089 
1090  opengl_fill_color_map(opengl);
1091  opengl_get_texture_params(opengl);
1092 
1093  if ((ret = opengl_init_context(opengl)) < 0)
1094  goto fail;
1095 
1096  if ((ret = opengl_prepare_vertex(h)) < 0)
1097  goto fail;
1098 
1099  glClear(GL_COLOR_BUFFER_BIT);
1100 
1101 #if HAVE_SDL2
1102  if (!opengl->no_window)
1103  SDL_GL_SwapWindow(opengl->window);
1104 #endif
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");
1108  goto fail;
1109  }
1110 
1111  ret = AVERROR_EXTERNAL;
1112  OPENGL_ERROR_CHECK(opengl);
1113 
1114  opengl->inited = 1;
1115  return 0;
1116 
1117  fail:
1118  opengl_write_trailer(h);
1119  return ret;
1120 }
1121 
1122 static uint8_t* opengl_get_plane_pointer(OpenGLContext *opengl, AVPacket *pkt, int comp_index,
1123  const AVPixFmtDescriptor *desc)
1124 {
1125  uint8_t *data = pkt->data;
1126  int wordsize = opengl_type_size(opengl->type);
1127  int width_chroma = AV_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w);
1128  int height_chroma = AV_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h);
1129  int plane = desc->comp[comp_index].plane;
1130 
1131  switch(plane) {
1132  case 0:
1133  break;
1134  case 1:
1135  data += opengl->width * opengl->height * wordsize;
1136  break;
1137  case 2:
1138  data += opengl->width * opengl->height * wordsize;
1139  data += width_chroma * height_chroma * wordsize;
1140  break;
1141  case 3:
1142  data += opengl->width * opengl->height * wordsize;
1143  data += 2 * width_chroma * height_chroma * wordsize;
1144  break;
1145  default:
1146  return NULL;
1147  }
1148  return data;
1149 }
1150 
1151 #define LOAD_TEXTURE_DATA(comp_index, sub) \
1152 { \
1153  int width = sub ? AV_CEIL_RSHIFT(opengl->width, desc->log2_chroma_w) : opengl->width; \
1154  int height = sub ? AV_CEIL_RSHIFT(opengl->height, desc->log2_chroma_h): opengl->height; \
1155  uint8_t *data; \
1156  int plane = desc->comp[comp_index].plane; \
1157  \
1158  glBindTexture(GL_TEXTURE_2D, opengl->texture_name[comp_index]); \
1159  if (!is_pkt) { \
1160  GLint length = ((AVFrame *)input)->linesize[plane]; \
1161  int bytes_per_pixel = opengl_type_size(opengl->type); \
1162  if (!(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) \
1163  bytes_per_pixel *= desc->nb_components; \
1164  data = ((AVFrame *)input)->data[plane]; \
1165  if (!(length % bytes_per_pixel) && \
1166  (opengl->unpack_subimage || ((length / bytes_per_pixel) == width))) { \
1167  length /= bytes_per_pixel; \
1168  if (length != width) \
1169  glPixelStorei(FF_GL_UNPACK_ROW_LENGTH, length); \
1170  glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, \
1171  opengl->format, opengl->type, data); \
1172  if (length != width) \
1173  glPixelStorei(FF_GL_UNPACK_ROW_LENGTH, 0); \
1174  } else { \
1175  int h; \
1176  for (h = 0; h < height; h++) { \
1177  glTexSubImage2D(GL_TEXTURE_2D, 0, 0, h, width, 1, \
1178  opengl->format, opengl->type, data); \
1179  data += length; \
1180  } \
1181  } \
1182  } else { \
1183  data = opengl_get_plane_pointer(opengl, input, comp_index, desc); \
1184  glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, \
1185  opengl->format, opengl->type, data); \
1186  } \
1187 }
1188 
1189 static int opengl_draw(AVFormatContext *h, void *input, int repaint, int is_pkt)
1190 {
1191  OpenGLContext *opengl = h->priv_data;
1192  enum AVPixelFormat pix_fmt = h->streams[0]->codecpar->format;
1193  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
1194  int ret;
1195 
1196 #if HAVE_SDL2
1197  if (!opengl->no_window && (ret = opengl_sdl_process_events(h)) < 0)
1198  goto fail;
1199 #endif
1200  if (opengl->no_window &&
1201  (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER, NULL , 0)) < 0) {
1202  av_log(opengl, AV_LOG_ERROR, "Application failed to prepare window buffer.\n");
1203  goto fail;
1204  }
1205 
1206  glClear(GL_COLOR_BUFFER_BIT);
1207 
1208  if (!repaint) {
1209  if (is_pkt)
1210  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
1211  LOAD_TEXTURE_DATA(0, 0)
1212  if (desc->flags & AV_PIX_FMT_FLAG_PLANAR) {
1213  LOAD_TEXTURE_DATA(1, 1)
1214  LOAD_TEXTURE_DATA(2, 1)
1215  if (desc->flags & AV_PIX_FMT_FLAG_ALPHA)
1216  LOAD_TEXTURE_DATA(3, 0)
1217  }
1218  }
1219  ret = AVERROR_EXTERNAL;
1220  OPENGL_ERROR_CHECK(opengl);
1221 
1222  if ((ret = opengl_prepare(opengl)) < 0)
1223  goto fail;
1224 
1225  opengl->glprocs.glBindBuffer(FF_GL_ARRAY_BUFFER, opengl->vertex_buffer);
1226  opengl->glprocs.glBindBuffer(FF_GL_ELEMENT_ARRAY_BUFFER, opengl->index_buffer);
1227  opengl->glprocs.glVertexAttribPointer(opengl->position_attrib, 3, GL_FLOAT, GL_FALSE, sizeof(OpenGLVertexInfo), 0);
1228  opengl->glprocs.glEnableVertexAttribArray(opengl->position_attrib);
1229  opengl->glprocs.glVertexAttribPointer(opengl->texture_coords_attrib, 2, GL_FLOAT, GL_FALSE, sizeof(OpenGLVertexInfo), 12);
1230  opengl->glprocs.glEnableVertexAttribArray(opengl->texture_coords_attrib);
1231 
1232  glDrawElements(GL_TRIANGLES, FF_ARRAY_ELEMS(g_index), GL_UNSIGNED_SHORT, 0);
1233 
1234  ret = AVERROR_EXTERNAL;
1235  OPENGL_ERROR_CHECK(opengl);
1236 
1237 #if HAVE_SDL2
1238  if (!opengl->no_window)
1239  SDL_GL_SwapWindow(opengl->window);
1240 #endif
1241  if (opengl->no_window &&
1242  (ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
1243  av_log(opengl, AV_LOG_ERROR, "Application failed to display window buffer.\n");
1244  goto fail;
1245  }
1246 
1247  return 0;
1248  fail:
1249  return ret;
1250 }
1251 
1252 static int opengl_write_packet(AVFormatContext *h, AVPacket *pkt)
1253 {
1254  return opengl_draw(h, pkt, 0, 1);
1255 }
1256 
1257 static int opengl_write_frame(AVFormatContext *h, int stream_index,
1258  AVFrame **frame, unsigned flags)
1259 {
1260  if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
1261  return 0;
1262  return opengl_draw(h, *frame, 0, 0);
1263 }
1264 
1265 #define OFFSET(x) offsetof(OpenGLContext, x)
1266 #define ENC AV_OPT_FLAG_ENCODING_PARAM
1267 static const AVOption options[] = {
1268  { "background", "set background color", OFFSET(background), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, ENC },
1269  { "no_window", "disable default window", OFFSET(no_window), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
1270  { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, ENC },
1271  { "window_size", "set window size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, ENC },
1272  { NULL }
1273 };
1274 
1275 static const AVClass opengl_class = {
1276  .class_name = "opengl outdev",
1277  .item_name = av_default_item_name,
1278  .option = options,
1279  .version = LIBAVUTIL_VERSION_INT,
1280  .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
1281 };
1282 
1283 AVOutputFormat ff_opengl_muxer = {
1284  .name = "opengl",
1285  .long_name = NULL_IF_CONFIG_SMALL("OpenGL output"),
1286  .priv_data_size = sizeof(OpenGLContext),
1287  .audio_codec = AV_CODEC_ID_NONE,
1288  .video_codec = AV_CODEC_ID_RAWVIDEO,
1289  .write_header = opengl_write_header,
1290  .write_packet = opengl_write_packet,
1291  .write_uncoded_frame = opengl_write_frame,
1292  .write_trailer = opengl_write_trailer,
1293  .control_message = opengl_control_message,
1294  .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
1295  .priv_class = &opengl_class,
1296 };
plane
int plane
Definition: avisynth_c.h:422
OpenGLContext::max_texture_size
GLint max_texture_size
Maximum texture size.
Definition: opengl_enc.c:189
AV_APP_TO_DEV_WINDOW_SIZE
Window size change message.
Definition: avdevice.h:135
OpenGLContext::model_view_matrix
GLfloat model_view_matrix[16]
Modev view matrix.
Definition: opengl_enc.c:213
AVComponentDescriptor::plane
int plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:35
NULL
#define NULL
Definition: coverity.c:32
AV_APP_TO_DEV_WINDOW_REPAINT
Repaint request message.
Definition: avdevice.h:145
usage
ptrdiff_t const GLvoid GLenum usage
Definition: opengl_enc.c:101
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:378
s
const char * s
Definition: avisynth_c.h:768
g_index
static const GLushort g_index[6]
Definition: opengl_enc.c:168
FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR
static const char *const FF_OPENGL_FRAGMENT_SHADER_RGBA_PLANAR
Fragment shader for planar RGBA formats.
Definition: opengl_enc_shaders.h:78
AV_CODEC_ID_NONE
Definition: avcodec.h:192
ENC
#define ENC
Definition: opengl_enc.c:1266
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:40
shift
static int shift(int a, int b)
Definition: sonic.c:82
FF_GL_FRAGMENT_SHADER
#define FF_GL_FRAGMENT_SHADER
Definition: opengl_enc.c:93
FFOpenGLFunctions::glDeleteShader
FF_PFNGLDELETESHADERPROC glDeleteShader
Definition: opengl_enc.c:145
opengl_prepare
static int opengl_prepare(OpenGLContext *opengl)
Definition: opengl_enc.c:902
AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER
Prepare window buffer message.
Definition: avdevice.h:230
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2266
OpenGLVertexInfo::z
float z
Position.
Definition: opengl_enc.c:163
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
OpenGLContext::chroma_div_h
GLfloat chroma_div_h
Chroma subsampling h ratio.
Definition: opengl_enc.c:216
AVDeviceRect::x
int x
x coordinate of top left corner
Definition: avdevice.h:111
OpenGLContext::picture_width
int picture_width
Rendered width.
Definition: opengl_enc.c:224
h
h
Definition: vp9dsp_template.c:2093
AVOption
AVOption.
Definition: opt.h:245
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
OpenGLFormatDesc::fragment_shader
const char *const * fragment_shader
Definition: opengl_enc.c:232
FFOpenGLFunctions::glDeleteProgram
FF_PFNGLDELETEPROGRAMPROC glDeleteProgram
Definition: opengl_enc.c:138
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
opengl_type_size
static int opengl_type_size(GLenum type)
Definition: opengl_enc.c:635
LOAD_OPENGL_FUN
#define LOAD_OPENGL_FUN(name, type)
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
desc
const char * desc
Definition: nvenc.c:101
AV_OPT_TYPE_INT
Definition: opt.h:223
FF_GL_LINK_STATUS
#define FF_GL_LINK_STATUS
Definition: opengl_enc.c:96
AV_PIX_FMT_RGBA64
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:331
OpenGLContext::model_view_matrix_location
GLint model_view_matrix_location
Definition: opengl_enc.c:204
APIENTRY
#define APIENTRY
Definition: opengl_enc.c:65
OpenGLContext::inited
int inited
Set to 1 when write_header was successfully called.
Definition: opengl_enc.c:183
OpenGLContext::no_window
int no_window
0 for create default window
Definition: opengl_enc.c:185
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3980
AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:180
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:956
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_PIX_FMT_BGRA64
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:336
OPENGL_ERROR_CHECK
#define OPENGL_ERROR_CHECK(ctx)
Definition: opengl_enc.c:152
new_height
AVS_VideoFrame int int int int new_height
Definition: avisynth_c.h:818
opengl_write_trailer
static av_cold int opengl_write_trailer(AVFormatContext *h)
Definition: opengl_enc.c:977
FF_OPENGL_VERTEX_SHADER
static const char *const FF_OPENGL_VERTEX_SHADER
Definition: opengl_enc_shaders.h:26
version
int version
Definition: avisynth_c.h:766
AV_PIX_FMT_0BGR
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:253
v0
GLfloat v0
Definition: opengl_enc.c:107
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
FFOpenGLFunctions::glAttachShader
FF_PFNGLATTACHSHADERPROC glAttachShader
Definition: opengl_enc.c:143
OpenGLContext::texture_location
GLint texture_location[4]
Definition: opengl_enc.c:208
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
opengl_compute_display_area
static void opengl_compute_display_area(AVFormatContext *s)
Definition: opengl_enc.c:663
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3972
FFOpenGLFunctions::glUseProgram
FF_PFNGLUSEPROGRAMPROC glUseProgram
Definition: opengl_enc.c:139
AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER
Display window buffer message.
Definition: avdevice.h:241
opengl_init_context
static av_cold int opengl_init_context(OpenGLContext *opengl)
Definition: opengl_enc.c:991
AVFormatContext
Format I/O context.
Definition: avformat.h:1338
AV_DEV_TO_APP_CREATE_WINDOW_BUFFER
Create window buffer message.
Definition: avdevice.h:219
string
GLsizei const char ** string
Definition: opengl_enc.c:120
FFOpenGLFunctions::glCompileShader
FF_PFNGLCOMPILESHADERPROC glCompileShader
Definition: opengl_enc.c:146
AV_OPT_TYPE_COLOR
Definition: opt.h:237
normalized
GLint GLenum GLboolean normalized
Definition: opengl_enc.c:105
opengl_write_packet
static int opengl_write_packet(AVFormatContext *h, AVPacket *pkt)
Definition: opengl_enc.c:1252
FFOpenGLFunctions::glShaderSource
FF_PFNGLSHADERSOURCEPROC glShaderSource
Definition: opengl_enc.c:147
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
avdevice_dev_to_app_control_message
int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type, void *data, size_t data_size)
Send control message from device to application.
Definition: avdevice.c:135
OpenGLContext::height
int height
Stream height.
Definition: opengl_enc.c:222
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
opengl_fill_color_map
static av_cold void opengl_fill_color_map(OpenGLContext *opengl)
Definition: opengl_enc.c:705
FF_GL_ELEMENT_ARRAY_BUFFER
#define FF_GL_ELEMENT_ARRAY_BUFFER
Definition: opengl_enc.c:91
FFOpenGLFunctions::glUniform1f
FF_PFNGLUNIFORM1FPROC glUniform1f
Definition: opengl_enc.c:134
AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:102
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:173
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
FF_GL_UNSIGNED_BYTE_3_3_2
#define FF_GL_UNSIGNED_BYTE_3_3_2
Definition: opengl_enc.c:84
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:4046
FFOpenGLFunctions::glGetUniformLocation
FF_PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation
Definition: opengl_enc.c:133
AV_PIX_FMT_RGB0
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:252
opt.h
AVOptions.
OpenGLContext::position_attrib
GLint position_attrib
Attibutes' locations.
Definition: opengl_enc.c:209
AV_WRITE_UNCODED_FRAME_QUERY
Query whether the feature is possible on this stream.
Definition: internal.h:572
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
FFOpenGLFunctions::glGetShaderiv
FF_PFNGLGETSHADERIVPROC glGetShaderiv
Definition: opengl_enc.c:148
FFOpenGLFunctions::glBindBuffer
FF_PFNGLBINDBUFFERPROC glBindBuffer
Definition: opengl_enc.c:129
opengl_resize
static int opengl_resize(AVFormatContext *h, int width, int height)
Definition: opengl_enc.c:309
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1406
AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:95
pointer
GLint GLenum GLboolean GLsizei uintptr_t pointer
Definition: opengl_enc.c:105
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
height
#define height
AV_OPT_TYPE_STRING
Definition: opt.h:227
AVPacket::data
uint8_t * data
Definition: avcodec.h:1601
FFOpenGLFunctions::glEnableVertexAttribArray
FF_PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray
Definition: opengl_enc.c:131
OpenGLContext::chroma_div_w
GLfloat chroma_div_w
Chroma subsampling w ratio.
Definition: opengl_enc.c:215
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:354
opengl_draw
static int opengl_draw(AVFormatContext *h, void *intput, int repaint, int is_pkt)
Definition: opengl_enc.c:1189
opengl_control_message
static int opengl_control_message(AVFormatContext *h, int type, void *data, size_t data_size)
Definition: opengl_enc.c:329
size
ptrdiff_t size
Definition: opengl_enc.c:101
OpenGLContext::vertex_buffer
GLuint vertex_buffer
Vertex buffer.
Definition: opengl_enc.c:201
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:377
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
OpenGLContext::fragment_shader
GLuint fragment_shader
Fragment shader for current pix_pmt.
Definition: opengl_enc.c:198
OpenGLContext::texture_name
GLuint texture_name[4]
Textures' IDs.
Definition: opengl_enc.c:199
FFOpenGLFunctions::glLinkProgram
FF_PFNGLLINKPROGRAMPROC glLinkProgram
Definition: opengl_enc.c:140
opengl_enc_shaders.h
OpenGLContext::texture_coords_attrib
GLint texture_coords_attrib
Definition: opengl_enc.c:210
avdevice.h
Main libavdevice API header.
OpenGLContext::glprocs
FFOpenGLFunctions glprocs
Definition: opengl_enc.c:181
FF_GL_VERTEX_SHADER
#define FF_GL_VERTEX_SHADER
Definition: opengl_enc.c:94
AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:188
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
FFOpenGLFunctions::glDeleteBuffers
FF_PFNGLDELETEBUFFERSPROC glDeleteBuffers
Definition: opengl_enc.c:127
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:78
AVERROR
#define AVERROR(e)
Definition: error.h:43
AV_PIX_FMT_FLAG_RGB
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
ff_opengl_muxer
AVOutputFormat ff_opengl_muxer
Definition: opengl_enc.c:1283
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:379
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3976
params
GLenum GLint * params
Definition: opengl_enc.c:114
AV_PIX_FMT_RGB48
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:327
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR
static const char *const FF_OPENGL_FRAGMENT_SHADER_YUVA_PLANAR
Fragment shader for planar YUVA formats.
Definition: opengl_enc_shaders.h:150
length
GLsizei GLsizei * length
Definition: opengl_enc.c:115
OpenGLContext::non_pow_2_textures
int non_pow_2_textures
1 when non power of 2 textures are supported
Definition: opengl_enc.c:192
count
GLsizei count
Definition: opengl_enc.c:109
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
OpenGLContext::chroma_div_w_location
GLint chroma_div_w_location
Definition: opengl_enc.c:206
FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR
static const char *const FF_OPENGL_FRAGMENT_SHADER_RGB_PLANAR
Fragment shader for planar RGB formats.
Definition: opengl_enc_shaders.h:100
AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:93
fail
#define fail()
Definition: checkasm.h:83
OpenGLFormatDesc::fixel_format
enum AVPixelFormat fixel_format
Definition: opengl_enc.c:231
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:363
AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
return
return
Definition: audio_convert.c:415
AVPixFmtDescriptor::flags
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1394
OpenGLContext::background
uint8_t background[4]
Background color.
Definition: opengl_enc.c:184
FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET
static const char *const FF_OPENGL_FRAGMENT_SHADER_RGBA_PACKET
Fragment shader for packet RGBA formats.
Definition: opengl_enc_shaders.h:44
window
static SDL_Window * window
Definition: ffplay.c:361
AVPixFmtDescriptor::nb_components
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:360
AVFormatContext::filename
char filename[1024]
input or output filename
Definition: avformat.h:1414
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:325
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
opengl_write_header
static av_cold int opengl_write_header(AVFormatContext *h)
Definition: opengl_enc.c:1050
width
#define width
opengl_deinit_context
static av_cold void opengl_deinit_context(OpenGLContext *opengl)
Definition: opengl_enc.c:283
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
value
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
opengl_get_fragment_shader_code
static const char * opengl_get_fragment_shader_code(enum AVPixelFormat format)
Definition: opengl_enc.c:625
OpenGLContext::pix_fmt
enum AVPixelFormat pix_fmt
Stream pixel format.
Definition: opengl_enc.c:223
AVOutputFormat::name
const char * name
Definition: avformat.h:524
FFOpenGLFunctions::glCreateProgram
FF_PFNGLCREATEPROGRAMPROC glCreateProgram
Definition: opengl_enc.c:137
options
static const AVOption options[]
Definition: opengl_enc.c:1267
FF_GL_RED_COMPONENT
#define FF_GL_RED_COMPONENT
Definition: opengl_enc.c:80
n
int n
Definition: avisynth_c.h:684
opengl_load_shader
static av_cold GLuint opengl_load_shader(OpenGLContext *opengl, GLenum type, const char *source)
Definition: opengl_enc.c:737
AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
OpenGLVertexInfo::t0
float t0
Texture coords.
Definition: opengl_enc.c:164
OpenGLContext::vertex
OpenGLVertexInfo vertex[4]
VBO.
Definition: opengl_enc.c:202
GLint
typedef GLint(APIENTRY *FF_PFNGLGETATTRIBLOCATIONPROC)(GLuint program
FFOpenGLFunctions::glBufferData
FF_PFNGLBUFFERDATAPROC glBufferData
Definition: opengl_enc.c:128
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER
Destroy window buffer message.
Definition: avdevice.h:252
FF_GL_STATIC_DRAW
#define FF_GL_STATIC_DRAW
Definition: opengl_enc.c:92
FILL_COMPONENT
#define FILL_COMPONENT(i)
AVStream
Stream structure.
Definition: avformat.h:889
AVFMT_NOTIMESTAMPS
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:486
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:352
AV_PIX_FMT_BGR555
#define AV_PIX_FMT_BGR555
Definition: pixfmt.h:334
OpenGLContext::chroma_div_h_location
GLint chroma_div_h_location
Definition: opengl_enc.c:207
opengl_release_window
static int opengl_release_window(AVFormatContext *h)
Definition: opengl_enc.c:960
AV_PIX_FMT_BGR8
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:84
shader
GLuint shader
Definition: opengl_enc.c:116
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
FFOpenGLFunctions::glGetProgramInfoLog
FF_PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog
Definition: opengl_enc.c:142
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
AVDeviceRect::height
int height
height
Definition: avdevice.h:114
opengl_format_desc
static const struct OpenGLFormatDesc opengl_format_desc[]
OpenGLContext::projection_matrix
GLfloat projection_matrix[16]
Projection matrix.
Definition: opengl_enc.c:212
AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:189
pname
GLenum pname
Definition: opengl_enc.c:114
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
FFOpenGLFunctions::glUniformMatrix4fv
FF_PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv
Definition: opengl_enc.c:136
opengl_get_texture_size
static av_cold void opengl_get_texture_size(OpenGLContext *opengl, int in_width, int in_height, int *out_width, int *out_height)
Definition: opengl_enc.c:687
opengl_get_texture_params
static av_cold void opengl_get_texture_params(OpenGLContext *opengl)
Definition: opengl_enc.c:651
FF_OPENGL_FRAGMENT_SHADER_GRAY
static const char *const FF_OPENGL_FRAGMENT_SHADER_GRAY
Definition: opengl_enc_shaders.h:176
opengl_create_window
static int opengl_create_window(AVFormatContext *h)
Definition: opengl_enc.c:927
FF_GL_INFO_LOG_LENGTH
#define FF_GL_INFO_LOG_LENGTH
Definition: opengl_enc.c:97
opengl_read_limits
static av_cold int opengl_read_limits(OpenGLContext *opengl)
Definition: opengl_enc.c:571
GLuint
typedef GLuint(APIENTRY *FF_PFNGLCREATEPROGRAMPROC)(void)
type
GLint GLenum type
Definition: opengl_enc.c:105
window_title
static const char * window_title
Definition: ffplay.c:313
bufSize
GLsizei bufSize
Definition: opengl_enc.c:115
AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
Definition: ffmpeg.c:645
format
static const char * format
Definition: movenc.c:47
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
opengl_make_ortho
static void opengl_make_ortho(float matrix[16], float left, float right, float bottom, float top, float nearZ, float farZ)
Definition: opengl_enc.c:551
index
int index
Definition: gxfenc.c:89
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
FFOpenGLFunctions::glGenBuffers
FF_PFNGLGENBUFFERSPROC glGenBuffers
Definition: opengl_enc.c:126
FFOpenGLFunctions::glGetShaderInfoLog
FF_PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog
Definition: opengl_enc.c:149
FF_GL_ARRAY_BUFFER
#define FF_GL_ARRAY_BUFFER
Definition: opengl_enc.c:90
opengl_prepare_vertex
static av_cold int opengl_prepare_vertex(AVFormatContext *s)
Definition: opengl_enc.c:857
AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:254
infoLog
GLsizei GLsizei char * infoLog
Definition: opengl_enc.c:115
transpose
GLsizei GLboolean transpose
Definition: opengl_enc.c:109
OpenGLContext::vertex_shader
GLuint vertex_shader
Vertex shader.
Definition: opengl_enc.c:197
FFOpenGLFunctions::glUniform1i
FF_PFNGLUNIFORM1IPROC glUniform1i
Definition: opengl_enc.c:135
opengl_load_procedures
static int av_cold opengl_load_procedures(OpenGLContext *opengl)
Definition: opengl_enc.c:490
AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:232
OpenGLContext::color_map_location
GLint color_map_location
Definition: opengl_enc.c:205
FF_GL_UNSIGNED_BYTE_2_3_3_REV
#define FF_GL_UNSIGNED_BYTE_2_3_3_REV
Definition: opengl_enc.c:85
OpenGLContext::picture_height
int picture_height
Rendered height.
Definition: opengl_enc.c:225
AV_PIX_FMT_BGR565
#define AV_PIX_FMT_BGR565
Definition: pixfmt.h:333
FFOpenGLFunctions::glGetProgramiv
FF_PFNGLGETPROGRAMIVPROC glGetProgramiv
Definition: opengl_enc.c:141
flags
static int flags
Definition: cpu.c:47
AVDeviceRect::width
int width
width
Definition: avdevice.h:113
OpenGLContext::program
GLuint program
Shader program.
Definition: opengl_enc.c:196
OpenGLContext::window_title
char * window_title
Title of the window.
Definition: opengl_enc.c:186
FF_GL_UNSIGNED_SHORT_1_5_5_5_REV
#define FF_GL_UNSIGNED_SHORT_1_5_5_5_REV
Definition: opengl_enc.c:86
av_cmp_q
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
OpenGLContext::unpack_subimage
int unpack_subimage
1 when GL_EXT_unpack_subimage is available
Definition: opengl_enc.c:193
avformat.h
Main libavformat public API header.
opengl_write_frame
static int opengl_write_frame(AVFormatContext *h, int stream_index, AVFrame **frame, unsigned flags)
Definition: opengl_enc.c:1257
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
FFOpenGLFunctions::glVertexAttribPointer
FF_PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer
Definition: opengl_enc.c:132
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:70
opengl_compile_shaders
static av_cold int opengl_compile_shaders(OpenGLContext *opengl, enum AVPixelFormat pix_fmt)
Definition: opengl_enc.c:768
FFOpenGLFunctions::glActiveTexture
FF_PFNGLACTIVETEXTUREPROC glActiveTexture
Definition: opengl_enc.c:125
common.h
common internal and external API header
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:478
buffers
GLuint * buffers
Definition: opengl_enc.c:99
AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:229
OpenGLContext::max_viewport_height
GLint max_viewport_height
Maximum viewport size.
Definition: opengl_enc.c:191
FFOpenGLFunctions::glCreateShader
FF_PFNGLCREATESHADERPROC glCreateShader
Definition: opengl_enc.c:144
OpenGLContext::max_viewport_width
GLint max_viewport_width
Maximum viewport size.
Definition: opengl_enc.c:190
AV_PIX_FMT_RGB8
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:87
AV_PIX_FMT_RGB555
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:329
AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
FF_GL_COMPILE_STATUS
#define FF_GL_COMPILE_STATUS
Definition: opengl_enc.c:95
OpenGLContext::color_map
GLfloat color_map[16]
RGBA color map matrix.
Definition: opengl_enc.c:214
AVRational::den
int den
Denominator.
Definition: rational.h:60
FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR
static const char *const FF_OPENGL_FRAGMENT_SHADER_YUV_PLANAR
Fragment shader for planar YUV formats.
Definition: opengl_enc_shaders.h:121
opengl_class
static const AVClass opengl_class
Definition: opengl_enc.c:1275
AVFMT_VARIABLE_FPS
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:489
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1366
OpenGLContext::index_buffer
GLuint index_buffer
Index buffer.
Definition: opengl_enc.c:200
OFFSET
#define OFFSET(x)
Definition: opengl_enc.c:1265
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:344
opengl_get_plane_pointer
static uint8_t * opengl_get_plane_pointer(OpenGLContext *opengl, AVPacket *pkt, int comp_index, const AVPixFmtDescriptor *desc)
Definition: opengl_enc.c:1122
FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET
static const char *const FF_OPENGL_FRAGMENT_SHADER_RGB_PACKET
Fragment shader for packet RGB formats.
Definition: opengl_enc_shaders.h:61
OpenGLContext::format
GLenum format
Definition: opengl_enc.c:219
tab
static const struct twinvq_data tab
Definition: twinvq_data.h:11135
LOAD_TEXTURE_DATA
#define LOAD_TEXTURE_DATA(comp_index, sub)
Definition: opengl_enc.c:1151
AV_PIX_FMT_RGB565
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:328
opengl_configure_texture
static av_cold int opengl_configure_texture(OpenGLContext *opengl, GLuint texture, GLsizei width, GLsizei height)
Definition: opengl_enc.c:837
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:100
FFOpenGLFunctions::glGetAttribLocation
FF_PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation
Definition: opengl_enc.c:130
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:195
AVStream::codecpar
AVCodecParameters * codecpar
Definition: avformat.h:1241
AV_CODEC_ID_RAWVIDEO
Definition: avcodec.h:210
AVDeviceRect::y
int y
y coordinate of top left corner
Definition: avdevice.h:112
av_get_pix_fmt_name
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2182
AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:251
OpenGLContext::width
int width
Stream width.
Definition: opengl_enc.c:221
opengl_make_identity
static void opengl_make_identity(float matrix[16])
Definition: opengl_enc.c:545
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1578
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:353
buffer
GLuint buffer
Definition: opengl_enc.c:102
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
name
const char * name
Definition: opengl_enc.c:103
OpenGLContext::projection_matrix_location
GLint projection_matrix_location
Uniforms' locations.
Definition: opengl_enc.c:203
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