1 #include "pbo_frame_allocator.h"
3 #include <bmusb/bmusb.h>
4 #include <movit/util.h>
12 PBOFrameAllocator::PBOFrameAllocator(size_t frame_size, GLuint width, GLuint height, size_t num_queued_frames, GLenum buffer, GLenum permissions, GLenum map_bits)
15 userdata.reset(new Userdata[num_queued_frames]);
16 for (size_t i = 0; i < num_queued_frames; ++i) {
18 glGenBuffers(1, &pbo);
20 glBindBuffer(buffer, pbo);
22 glBufferStorage(buffer, frame_size, NULL, permissions | GL_MAP_PERSISTENT_BIT);
26 frame.data = (uint8_t *)glMapBufferRange(buffer, 0, frame_size, permissions | map_bits | GL_MAP_PERSISTENT_BIT);
27 frame.data2 = frame.data + frame_size / 2;
29 frame.size = frame_size;
30 frame.userdata = &userdata[i];
31 userdata[i].pbo = pbo;
33 frame.interleaved = true;
35 // Create textures. We don't allocate any data for the second field at this point
36 // (just create the texture state with the samplers), since our default assumed
37 // resolution is progressive.
38 glGenTextures(2, userdata[i].tex_y);
40 glGenTextures(2, userdata[i].tex_cbcr);
42 userdata[i].last_width[0] = width;
43 userdata[i].last_height[0] = height;
44 userdata[i].last_width[1] = 0;
45 userdata[i].last_height[1] = 0;
46 userdata[i].last_interlaced = false;
47 userdata[i].last_has_signal = false;
48 userdata[i].last_is_connected = false;
49 for (unsigned field = 0; field < 2; ++field) {
50 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_y[field]);
52 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
54 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
56 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
59 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
63 glBindTexture(GL_TEXTURE_2D, userdata[i].tex_cbcr[field]);
65 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
67 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
69 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
72 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, width / 2, height, 0, GL_RG, GL_UNSIGNED_BYTE, NULL);
79 glBindBuffer(buffer, 0);
81 glBindTexture(GL_TEXTURE_2D, 0);
85 PBOFrameAllocator::~PBOFrameAllocator()
87 while (!freelist.empty()) {
88 Frame frame = freelist.front();
90 GLuint pbo = ((Userdata *)frame.userdata)->pbo;
91 glBindBuffer(buffer, pbo);
93 glUnmapBuffer(buffer);
95 glBindBuffer(buffer, 0);
97 glDeleteBuffers(1, &pbo);
99 glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_y);
101 glDeleteTextures(2, ((Userdata *)frame.userdata)->tex_cbcr);
105 //static int sumsum = 0;
107 bmusb::FrameAllocator::Frame PBOFrameAllocator::alloc_frame()
111 unique_lock<mutex> lock(freelist_mutex); // Meh.
112 if (freelist.empty()) {
113 printf("Frame overrun (no more spare PBO frames), dropping frame!\n");
115 //fprintf(stderr, "freelist has %d allocated\n", ++sumsum);
116 vf = freelist.front();
117 freelist.pop(); // Meh.
124 void PBOFrameAllocator::release_frame(Frame frame)
126 if (frame.overflow > 0) {
127 printf("%d bytes overflow after last (PBO) frame\n", int(frame.overflow));
131 // Poison the page. (Note that this might be bogus if you don't have an OpenGL context.)
132 memset(frame.data, 0, frame.size);
133 Userdata *userdata = (Userdata *)frame.userdata;
134 for (unsigned field = 0; field < 2; ++field) {
135 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
137 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
139 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
141 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
143 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, userdata->last_width[field], userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
146 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
148 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
150 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
152 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
154 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, userdata->last_width[field] / 2, userdata->last_height[field], 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
159 unique_lock<mutex> lock(freelist_mutex);
160 freelist.push(frame);