1 #include "pbo_frame_allocator.h"
11 PBOFrameAllocator::PBOFrameAllocator(size_t frame_size, size_t num_queued_frames, GLenum buffer, GLenum permissions, GLenum map_bits)
12 : frame_size(frame_size), buffer(buffer)
14 for (size_t i = 0; i < num_queued_frames; ++i) {
16 glGenBuffers(1, &pbo);
18 glBindBuffer(buffer, pbo);
20 glBufferStorage(buffer, frame_size, NULL, permissions | GL_MAP_PERSISTENT_BIT);
24 frame.data = (uint8_t *)glMapBufferRange(buffer, 0, frame_size, permissions | map_bits | GL_MAP_PERSISTENT_BIT);
25 frame.data2 = frame.data + frame_size / 2;
27 frame.size = frame_size;
28 frame.userdata = (void *)(intptr_t)pbo;
30 frame.interleaved = true;
33 glBindBuffer(buffer, 0);
37 PBOFrameAllocator::~PBOFrameAllocator()
39 while (!freelist.empty()) {
40 Frame frame = freelist.front();
42 GLuint pbo = (intptr_t)frame.userdata;
43 glBindBuffer(buffer, pbo);
45 glUnmapBuffer(buffer);
47 glBindBuffer(buffer, 0);
49 glDeleteBuffers(1, &pbo);
52 //static int sumsum = 0;
54 FrameAllocator::Frame PBOFrameAllocator::alloc_frame()
58 std::unique_lock<std::mutex> lock(freelist_mutex); // Meh.
59 if (freelist.empty()) {
60 printf("Frame overrun (no more spare PBO frames), dropping frame!\n");
62 //fprintf(stderr, "freelist has %d allocated\n", ++sumsum);
63 vf = freelist.front();
64 freelist.pop(); // Meh.
70 void PBOFrameAllocator::release_frame(Frame frame)
72 std::unique_lock<std::mutex> lock(freelist_mutex);