]> git.sesse.net Git - movit/blob - resource_pool.cpp
Add a mode for YCbCrInput where Cb and Cr are in the same texture.
[movit] / resource_pool.cpp
1 #include <assert.h>
2 #include <pthread.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <algorithm>
6 #include <map>
7 #include <string>
8 #include <utility>
9 #include <epoxy/gl.h>
10
11 #include "init.h"
12 #include "resource_pool.h"
13 #include "util.h"
14
15 using namespace std;
16
17 namespace movit {
18
19 ResourcePool::ResourcePool(size_t program_freelist_max_length,
20                            size_t texture_freelist_max_bytes,
21                            size_t fbo_freelist_max_length)
22         : program_freelist_max_length(program_freelist_max_length),
23           texture_freelist_max_bytes(texture_freelist_max_bytes),
24           fbo_freelist_max_length(fbo_freelist_max_length),
25           texture_freelist_bytes(0)
26 {
27         pthread_mutex_init(&lock, NULL);
28 }
29
30 ResourcePool::~ResourcePool()
31 {
32         assert(program_refcount.empty());
33
34         for (list<GLuint>::const_iterator freelist_it = program_freelist.begin();
35              freelist_it != program_freelist.end();
36              ++freelist_it) {
37                 delete_program(*freelist_it);
38         }
39         assert(programs.empty());
40         assert(program_shaders.empty());
41
42         for (list<GLuint>::const_iterator freelist_it = texture_freelist.begin();
43              freelist_it != texture_freelist.end();
44              ++freelist_it) {
45                 GLuint free_texture_num = *freelist_it;
46                 assert(texture_formats.count(free_texture_num) != 0);
47                 texture_freelist_bytes -= estimate_texture_size(texture_formats[free_texture_num]);
48                 texture_formats.erase(free_texture_num);
49                 glDeleteTextures(1, &free_texture_num);
50                 check_error();
51         }
52         assert(texture_formats.empty());
53         assert(texture_freelist_bytes == 0);
54
55         void *context = get_gl_context_identifier();
56         cleanup_unlinked_fbos(context);
57
58         for (map<void *, std::list<GLuint> >::iterator context_it = fbo_freelist.begin();
59              context_it != fbo_freelist.end();
60              ++context_it) {
61                 if (context_it->first != context) {
62                         // If this does not hold, the client should have called clean_context() earlier.
63                         assert(context_it->second.empty());
64                         continue;
65                 }
66                 for (list<GLuint>::const_iterator freelist_it = context_it->second.begin();
67                      freelist_it != context_it->second.end();
68                      ++freelist_it) {
69                         pair<void *, GLuint> key(context, *freelist_it);
70                         GLuint free_fbo_num = *freelist_it;
71                         assert(fbo_formats.count(key) != 0);
72                         fbo_formats.erase(key);
73                         glDeleteFramebuffers(1, &free_fbo_num);
74                         check_error();
75                 }
76         }
77
78         assert(fbo_formats.empty());
79 }
80
81 void ResourcePool::delete_program(GLuint glsl_program_num)
82 {
83         bool found_program = false;
84         for (map<pair<string, string>, GLuint>::iterator program_it = programs.begin();
85              program_it != programs.end();
86              ++program_it) {
87                 if (program_it->second == glsl_program_num) {
88                         programs.erase(program_it);
89                         found_program = true;
90                         break;
91                 }
92         }
93         assert(found_program);
94         glDeleteProgram(glsl_program_num);
95
96         map<GLuint, pair<GLuint, GLuint> >::iterator shader_it =
97                 program_shaders.find(glsl_program_num);
98         assert(shader_it != program_shaders.end());
99
100         glDeleteShader(shader_it->second.first);
101         glDeleteShader(shader_it->second.second);
102         program_shaders.erase(shader_it);
103 }
104
105 GLuint ResourcePool::compile_glsl_program(const string& vertex_shader, const string& fragment_shader)
106 {
107         GLuint glsl_program_num;
108         pthread_mutex_lock(&lock);
109         const pair<string, string> key(vertex_shader, fragment_shader);
110         if (programs.count(key)) {
111                 // Already in the cache. Increment the refcount, or take it off the freelist
112                 // if it's zero.
113                 glsl_program_num = programs[key];
114                 map<GLuint, int>::iterator refcount_it = program_refcount.find(glsl_program_num);
115                 if (refcount_it != program_refcount.end()) {
116                         ++refcount_it->second;
117                 } else {
118                         list<GLuint>::iterator freelist_it =
119                                 find(program_freelist.begin(), program_freelist.end(), glsl_program_num);
120                         assert(freelist_it != program_freelist.end());
121                         program_freelist.erase(freelist_it);
122                         program_refcount.insert(make_pair(glsl_program_num, 1));
123                 }
124         } else {
125                 // Not in the cache. Compile the shaders.
126                 glsl_program_num = glCreateProgram();
127                 check_error();
128                 GLuint vs_obj = compile_shader(vertex_shader, GL_VERTEX_SHADER);
129                 check_error();
130                 GLuint fs_obj = compile_shader(fragment_shader, GL_FRAGMENT_SHADER);
131                 check_error();
132                 glAttachShader(glsl_program_num, vs_obj);
133                 check_error();
134                 glAttachShader(glsl_program_num, fs_obj);
135                 check_error();
136                 glLinkProgram(glsl_program_num);
137                 check_error();
138
139                 GLint success;
140                 glGetProgramiv(glsl_program_num, GL_LINK_STATUS, &success);
141                 if (success == GL_FALSE) {
142                         GLchar error_log[1024] = {0};
143                         glGetProgramInfoLog(glsl_program_num, 1024, NULL, error_log);
144                         fprintf(stderr, "Error linking program: %s\n", error_log);
145                         exit(1);
146                 }
147
148                 if (movit_debug_level == MOVIT_DEBUG_ON) {
149                         // Output shader to a temporary file, for easier debugging.
150                         static int compiled_shader_num = 0;
151                         char filename[256];
152                         sprintf(filename, "chain-%03d.frag", compiled_shader_num++);
153                         FILE *fp = fopen(filename, "w");
154                         if (fp == NULL) {
155                                 perror(filename);
156                                 exit(1);
157                         }
158                         fprintf(fp, "%s\n", fragment_shader.c_str());
159                         fclose(fp);
160                 }
161
162                 programs.insert(make_pair(key, glsl_program_num));
163                 program_refcount.insert(make_pair(glsl_program_num, 1));
164                 program_shaders.insert(make_pair(glsl_program_num, make_pair(vs_obj, fs_obj)));
165         }
166         pthread_mutex_unlock(&lock);
167         return glsl_program_num;
168 }
169
170 void ResourcePool::release_glsl_program(GLuint glsl_program_num)
171 {
172         pthread_mutex_lock(&lock);
173         map<GLuint, int>::iterator refcount_it = program_refcount.find(glsl_program_num);
174         assert(refcount_it != program_refcount.end());
175
176         if (--refcount_it->second == 0) {
177                 program_refcount.erase(refcount_it);
178                 assert(find(program_freelist.begin(), program_freelist.end(), glsl_program_num)
179                         == program_freelist.end());
180                 program_freelist.push_front(glsl_program_num);
181                 if (program_freelist.size() > program_freelist_max_length) {
182                         delete_program(program_freelist.back());
183                         program_freelist.pop_back();
184                 }
185         }
186
187         pthread_mutex_unlock(&lock);
188 }
189
190 GLuint ResourcePool::create_2d_texture(GLint internal_format, GLsizei width, GLsizei height)
191 {
192         assert(width > 0);
193         assert(height > 0);
194
195         pthread_mutex_lock(&lock);
196         // See if there's a texture on the freelist we can use.
197         for (list<GLuint>::iterator freelist_it = texture_freelist.begin();
198              freelist_it != texture_freelist.end();
199              ++freelist_it) {
200                 GLuint texture_num = *freelist_it;
201                 map<GLuint, Texture2D>::const_iterator format_it = texture_formats.find(texture_num);
202                 assert(format_it != texture_formats.end());
203                 if (format_it->second.internal_format == internal_format &&
204                     format_it->second.width == width &&
205                     format_it->second.height == height) {
206                         texture_freelist_bytes -= estimate_texture_size(format_it->second);
207                         texture_freelist.erase(freelist_it);
208                         pthread_mutex_unlock(&lock);
209                         return texture_num;
210                 }
211         }
212
213         // Find any reasonable format given the internal format; OpenGL validates it
214         // even though we give NULL as pointer.
215         GLenum format;
216         switch (internal_format) {
217         case GL_RGBA32F_ARB:
218         case GL_RGBA16F_ARB:
219         case GL_RGBA8:
220         case GL_SRGB8_ALPHA8:
221                 format = GL_RGBA;
222                 break;
223         case GL_RGB32F:
224         case GL_RGB16F:
225         case GL_RGB8:
226         case GL_SRGB8:
227                 format = GL_RGB;
228                 break;
229         case GL_RG32F:
230         case GL_RG16F:
231         case GL_RG8:
232                 format = GL_RG;
233                 break;
234         case GL_R32F:
235         case GL_R16F:
236         case GL_R8:
237                 format = GL_RED;
238                 break;
239         default:
240                 // TODO: Add more here as needed.
241                 assert(false);
242         }
243
244         // Same with type; GLES is stricter than desktop OpenGL here.
245         GLenum type;
246         switch (internal_format) {
247         case GL_RGBA32F_ARB:
248         case GL_RGBA16F_ARB:
249         case GL_RGB32F:
250         case GL_RGB16F:
251         case GL_RG32F:
252         case GL_RG16F:
253         case GL_R32F:
254         case GL_R16F:
255                 type = GL_FLOAT;
256                 break;
257         case GL_SRGB8_ALPHA8:
258         case GL_SRGB8:
259         case GL_RGBA8:
260         case GL_RGB8:
261         case GL_RG8:
262         case GL_R8:
263                 type = GL_UNSIGNED_BYTE;
264                 break;
265         default:
266                 // TODO: Add more here as needed.
267                 assert(false);
268         }
269
270
271         GLuint texture_num;
272         glGenTextures(1, &texture_num);
273         check_error();
274         glBindTexture(GL_TEXTURE_2D, texture_num);
275         check_error();
276         glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, type, NULL);
277         check_error();
278         glBindTexture(GL_TEXTURE_2D, 0);
279         check_error();
280
281         Texture2D texture_format;
282         texture_format.internal_format = internal_format;
283         texture_format.width = width;
284         texture_format.height = height;
285         assert(texture_formats.count(texture_num) == 0);
286         texture_formats.insert(make_pair(texture_num, texture_format));
287
288         pthread_mutex_unlock(&lock);
289         return texture_num;
290 }
291
292 void ResourcePool::release_2d_texture(GLuint texture_num)
293 {
294         pthread_mutex_lock(&lock);
295         texture_freelist.push_front(texture_num);
296         assert(texture_formats.count(texture_num) != 0);
297         texture_freelist_bytes += estimate_texture_size(texture_formats[texture_num]);
298
299         while (texture_freelist_bytes > texture_freelist_max_bytes) {
300                 GLuint free_texture_num = texture_freelist.back();
301                 texture_freelist.pop_back();
302                 assert(texture_formats.count(free_texture_num) != 0);
303                 texture_freelist_bytes -= estimate_texture_size(texture_formats[free_texture_num]);
304                 texture_formats.erase(free_texture_num);
305                 glDeleteTextures(1, &free_texture_num);
306                 check_error();
307
308                 // Unlink any lingering FBO related to this texture. We might
309                 // not be in the right context, so don't delete it right away;
310                 // the cleanup in release_fbo() (which calls cleanup_unlinked_fbos())
311                 // will take care of actually doing that later.
312                 for (map<pair<void *, GLuint>, FBO>::iterator format_it = fbo_formats.begin();
313                      format_it != fbo_formats.end();
314                      ++format_it) {
315                         for (unsigned i = 0; i < num_fbo_attachments; ++i) {
316                                 if (format_it->second.texture_num[i] == free_texture_num) {
317                                         format_it->second.texture_num[i] = GL_INVALID_INDEX;
318                                 }
319                         }
320                 }
321         }
322         pthread_mutex_unlock(&lock);
323 }
324
325 GLuint ResourcePool::create_fbo(GLuint texture0_num, GLuint texture1_num, GLuint texture2_num, GLuint texture3_num)
326 {
327         void *context = get_gl_context_identifier();
328
329         // Make sure we are filled from the bottom.
330         assert(texture0_num != 0);
331         if (texture1_num == 0) {
332                 assert(texture2_num == 0);
333         }
334         if (texture2_num == 0) {
335                 assert(texture3_num == 0);
336         }
337
338         pthread_mutex_lock(&lock);
339         if (fbo_freelist.count(context) != 0) {
340                 // See if there's an FBO on the freelist we can use.
341                 for (list<GLuint>::iterator freelist_it = fbo_freelist[context].begin();
342                      freelist_it != fbo_freelist[context].end();
343                      ++freelist_it) {
344                         GLuint fbo_num = *freelist_it;
345                         map<pair<void *, GLuint>, FBO>::const_iterator format_it =
346                                 fbo_formats.find(make_pair(context, fbo_num));
347                         assert(format_it != fbo_formats.end());
348                         if (format_it->second.texture_num[0] == texture0_num &&
349                             format_it->second.texture_num[1] == texture1_num &&
350                             format_it->second.texture_num[2] == texture2_num &&
351                             format_it->second.texture_num[3] == texture3_num) {
352                                 fbo_freelist[context].erase(freelist_it);
353                                 pthread_mutex_unlock(&lock);
354                                 return fbo_num;
355                         }
356                 }
357         }
358
359         // Create a new one.
360         FBO fbo_format;
361         fbo_format.texture_num[0] = texture0_num;
362         fbo_format.texture_num[1] = texture1_num;
363         fbo_format.texture_num[2] = texture2_num;
364         fbo_format.texture_num[3] = texture3_num;
365
366         GLuint fbo_num;
367         glGenFramebuffers(1, &fbo_num);
368         check_error();
369         glBindFramebuffer(GL_FRAMEBUFFER, fbo_num);
370         check_error();
371
372         GLenum bufs[num_fbo_attachments];
373         unsigned num_active_attachments = 0;
374         for (unsigned i = 0; i < num_fbo_attachments; ++i, ++num_active_attachments) {
375                 if (fbo_format.texture_num[i] == 0) {
376                         break;
377                 }
378                 glFramebufferTexture2D(
379                         GL_FRAMEBUFFER,
380                         GL_COLOR_ATTACHMENT0 + i,
381                         GL_TEXTURE_2D,
382                         fbo_format.texture_num[i],
383                         0);
384                 check_error();
385                 bufs[i] = GL_COLOR_ATTACHMENT0 + i;
386         }
387
388         glDrawBuffers(num_active_attachments, bufs);
389         check_error();
390
391         GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
392         assert(status == GL_FRAMEBUFFER_COMPLETE);
393         glBindFramebuffer(GL_FRAMEBUFFER, 0);
394         check_error();
395
396         pair<void *, GLuint> key(context, fbo_num);
397         assert(fbo_formats.count(key) == 0);
398         fbo_formats.insert(make_pair(key, fbo_format));
399
400         pthread_mutex_unlock(&lock);
401         return fbo_num;
402 }
403
404 void ResourcePool::release_fbo(GLuint fbo_num)
405 {
406         void *context = get_gl_context_identifier();
407
408         pthread_mutex_lock(&lock);
409         fbo_freelist[context].push_front(fbo_num);
410         assert(fbo_formats.count(make_pair(context, fbo_num)) != 0);
411
412         // Now that we're in this context, free up any FBOs that are connected
413         // to deleted textures (in release_2d_texture).
414         cleanup_unlinked_fbos(context);
415
416         shrink_fbo_freelist(context, fbo_freelist_max_length);
417         pthread_mutex_unlock(&lock);
418 }
419
420 void ResourcePool::clean_context()
421 {
422         void *context = get_gl_context_identifier();
423
424         // Currently, we only need to worry about FBOs, as they are the only
425         // non-shareable resource we hold.
426         shrink_fbo_freelist(context, 0);
427         fbo_freelist.erase(context);
428 }
429
430 void ResourcePool::cleanup_unlinked_fbos(void *context)
431 {
432         for (list<GLuint>::iterator freelist_it = fbo_freelist[context].begin();
433              freelist_it != fbo_freelist[context].end(); ) {
434                 GLuint fbo_num = *freelist_it;
435                 pair<void *, GLuint> key(context, fbo_num);
436                 assert(fbo_formats.count(key) != 0);
437
438                 bool all_unlinked = true;
439                 for (unsigned i = 0; i < num_fbo_attachments; ++i) {
440                         if (fbo_formats[key].texture_num[i] != 0 &&
441                             fbo_formats[key].texture_num[i] != GL_INVALID_INDEX) {
442                                 all_unlinked = false;
443                                 break;
444                         }
445                 }
446                 if (all_unlinked) {
447                         fbo_formats.erase(key);
448                         glDeleteFramebuffers(1, &fbo_num);
449                         check_error();
450                         fbo_freelist[context].erase(freelist_it++);
451                 } else {
452                         freelist_it++;
453                 }
454         }
455 }
456
457 void ResourcePool::shrink_fbo_freelist(void *context, size_t max_length)
458 {
459         while (fbo_freelist[context].size() > max_length) {
460                 GLuint free_fbo_num = fbo_freelist[context].back();
461                 pair<void *, GLuint> key(context, free_fbo_num);
462                 fbo_freelist[context].pop_back();
463                 assert(fbo_formats.count(key) != 0);
464                 fbo_formats.erase(key);
465                 glDeleteFramebuffers(1, &free_fbo_num);
466                 check_error();
467         }
468 }
469
470 size_t ResourcePool::estimate_texture_size(const Texture2D &texture_format)
471 {
472         size_t bytes_per_pixel;
473
474         switch (texture_format.internal_format) {
475         case GL_RGBA32F_ARB:
476                 bytes_per_pixel = 16;
477                 break;
478         case GL_RGBA16F_ARB:
479                 bytes_per_pixel = 8;
480                 break;
481         case GL_RGB32F_ARB:
482                 bytes_per_pixel = 12;
483                 break;
484         case GL_RGB16F_ARB:
485                 bytes_per_pixel = 6;
486                 break;
487         case GL_RGBA8:
488         case GL_SRGB8_ALPHA8:
489                 bytes_per_pixel = 4;
490                 break;
491         case GL_RGB8:
492         case GL_SRGB8:
493                 bytes_per_pixel = 3;
494                 break;
495         case GL_RG32F:
496                 bytes_per_pixel = 8;
497                 break;
498         case GL_RG16F:
499                 bytes_per_pixel = 4;
500                 break;
501         case GL_R32F:
502                 bytes_per_pixel = 4;
503                 break;
504         case GL_R16F:
505                 bytes_per_pixel = 2;
506                 break;
507         case GL_RG8:
508                 bytes_per_pixel = 2;
509                 break;
510         case GL_R8:
511                 bytes_per_pixel = 1;
512                 break;
513         default:
514                 // TODO: Add more here as needed.
515                 assert(false);
516         }
517
518         return texture_format.width * texture_format.height * bytes_per_pixel;
519 }
520
521 }  // namespace movit