4 #include <SDL2/SDL_error.h>
5 #include <SDL2/SDL_video.h>
7 #include <movit/util.h>
18 using namespace std::chrono;
23 const unsigned prob_bits = 12;
24 const unsigned prob_scale = 1 << prob_bits;
25 const unsigned NUM_SYMS = 256;
26 const unsigned NUM_TABLES = 16;
28 struct RansDecSymbol {
32 struct RansDecodeTable {
33 int cum2sym[prob_scale];
34 RansDecSymbol dsyms[NUM_SYMS];
36 RansDecodeTable decode_tables[NUM_TABLES];
38 optional<uint32_t> read_varint(const char **ptr, const char *end)
46 x |= (ch & 0x7f) << shift;
47 if ((ch & 0x80) == 0) return x;
50 return nullopt; // Error: Overlong int.
53 return nullopt; // Error: EOF.
57 uint src_offset, src_len;
59 CoeffStream streams[45 * 64]; // HACK
61 int main(int argc, char **argv)
63 // Set up an OpenGL context using SDL.
64 if (SDL_Init(SDL_INIT_VIDEO) == -1) {
65 fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
68 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
69 SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
70 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
71 SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
72 SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4);
73 SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 5);
75 SDL_Window *window = SDL_CreateWindow("OpenGL window for unit test",
76 SDL_WINDOWPOS_UNDEFINED,
77 SDL_WINDOWPOS_UNDEFINED,
80 SDL_GLContext context = SDL_GL_CreateContext(window);
81 assert(context != nullptr);
83 //char buf[16] = { 0 };
86 glGetIntegerv(GL_MAX_COMPUTE_SHARED_MEMORY_SIZE, &size);
87 printf("shared_memory_size=%u\n", size);
89 string shader_src = ::read_file("decoder.shader");
90 GLuint shader_num = compile_shader(shader_src, GL_COMPUTE_SHADER);
91 GLuint glsl_program_num = glCreateProgram();
92 glAttachShader(glsl_program_num, shader_num);
93 glLinkProgram(glsl_program_num);
96 glGetProgramiv(glsl_program_num, GL_LINK_STATUS, &success);
97 if (success == GL_FALSE) {
98 GLchar error_log[1024] = {0};
99 glGetProgramInfoLog(glsl_program_num, 1024, nullptr, error_log);
100 fprintf(stderr, "Error linking program: %s\n", error_log);
104 glUseProgram(glsl_program_num);
106 string coded = ::read_file(argc >= 2 ? argv[1] : "coded.dat");
107 const char *ptr = &coded[0];
108 const char *end = ptr + coded.size();
109 GLuint sign_bias[NUM_TABLES];
111 // printf("first few bytes offs=%zu: %d %d %d %d %d %d %d %d\n", ptr - coded.data(),
112 // (uint8_t)ptr[0], (uint8_t)ptr[1], (uint8_t)ptr[2], (uint8_t)ptr[3],
113 // (uint8_t)ptr[4], (uint8_t)ptr[5], (uint8_t)ptr[6], (uint8_t)ptr[7]);
115 // read the rANS tables
116 for (unsigned table = 0; table < NUM_TABLES; ++table) {
117 uint32_t cum_freq = 0;
118 for (unsigned sym = 0; sym < NUM_SYMS; ++sym) {
119 optional<uint32_t> freq = read_varint(&ptr, end);
121 fprintf(stderr, "Error parsing varint for table %d symbol %d\n", table, sym);
125 decode_tables[table].dsyms[(sym + 1) & 255].sym_start = cum_freq;
126 decode_tables[table].dsyms[(sym + 1) & 255].sym_freq = *freq;
127 for (uint32_t i = 0; i < freq; ++i) {
128 if (cum_freq < prob_scale)
129 decode_tables[table].cum2sym[cum_freq] = (sym + 1) & 255;
133 sign_bias[table] = cum_freq;
136 // Make cum2sym texture.
137 unique_ptr<uint8_t[]> cum2sym_data(new uint8_t[prob_scale * NUM_TABLES]);
138 for (unsigned table = 0; table < NUM_TABLES; ++table) {
139 for (unsigned i = 0; i < prob_scale; ++i) {
140 cum2sym_data[prob_scale * table + i] = decode_tables[table].cum2sym[i];
144 glGenTextures(1, &cum2sym_tex);
145 glBindTexture(GL_TEXTURE_2D, cum2sym_tex);
146 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
147 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
148 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
149 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
150 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8UI, prob_scale, NUM_TABLES, 0, GL_RED_INTEGER, GL_UNSIGNED_BYTE, cum2sym_data.get());
153 // Make dsyms texture.
154 unique_ptr<pair<uint16_t, uint16_t>[]> dsyms_data(new pair<uint16_t, uint16_t>[NUM_SYMS * NUM_TABLES]);
155 for (unsigned table = 0; table < NUM_TABLES; ++table) {
156 for (unsigned sym = 0; sym < NUM_SYMS; ++sym) {
157 dsyms_data[NUM_SYMS * table + sym].first = decode_tables[table].dsyms[sym].sym_start;
158 dsyms_data[NUM_SYMS * table + sym].second = decode_tables[table].dsyms[sym].sym_freq;
162 glGenTextures(1, &dsyms_tex);
163 glBindTexture(GL_TEXTURE_2D, dsyms_tex);
164 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
165 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
166 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
167 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
168 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG16UI, NUM_SYMS, NUM_TABLES, 0, GL_RG_INTEGER, GL_UNSIGNED_SHORT, dsyms_data.get());
172 glGenTextures(1, &coeff_tex);
173 glBindTexture(GL_TEXTURE_2D, coeff_tex);
174 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
176 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
178 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
180 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
182 glTexImage2D(GL_TEXTURE_2D, 0, GL_R16I, 1280, 720, 0, GL_RED_INTEGER, GL_SHORT, nullptr);
186 glGenTextures(1, &out_tex);
187 glBindTexture(GL_TEXTURE_2D, out_tex);
188 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
189 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
190 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
191 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
192 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, 1280, 720, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
193 //glTexImage2D(GL_TEXTURE_2D, 0, GL_R32F, 1280, 720, 0, GL_RED, GL_FLOAT, nullptr);
196 GLint cum2sym_tex_pos = glGetUniformLocation(glsl_program_num, "cum2sym_tex");
197 GLint dsyms_tex_pos = glGetUniformLocation(glsl_program_num, "dsyms_tex");
198 GLint out_tex_pos = glGetUniformLocation(glsl_program_num, "out_tex");
199 GLint coeff_tex_pos = glGetUniformLocation(glsl_program_num, "coeff_tex");
200 GLint sign_bias_pos = glGetUniformLocation(glsl_program_num, "sign_bias_per_model");
201 printf("%d err=0x%x pos=%d,%d,%d,%d\n", __LINE__, glGetError(), cum2sym_tex_pos, dsyms_tex_pos, out_tex_pos, sign_bias_pos);
203 // Bind the textures.
204 glUniform1i(cum2sym_tex_pos, 0);
205 glUniform1i(dsyms_tex_pos, 1);
206 glUniform1i(out_tex_pos, 2);
207 glUniform1i(coeff_tex_pos, 3);
208 glUniform1uiv(sign_bias_pos, 16, sign_bias);
209 glBindImageTexture(0, cum2sym_tex, 0, GL_FALSE, 0, GL_READ_ONLY, GL_R8UI);
210 glBindImageTexture(1, dsyms_tex, 0, GL_FALSE, 0, GL_READ_ONLY, GL_RG16UI);
211 glBindImageTexture(2, out_tex, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R8);
212 glBindImageTexture(3, coeff_tex, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R16I);
213 printf("%d err=0x%x\n", __LINE__, glGetError());
215 // Decode all luma blocks.
216 unsigned num_blocks = (HEIGHT / 16);
217 for (unsigned y = 0; y < 8; ++y) {
218 for (unsigned x = 0; x < 8; ++x) {
219 unsigned coeff_num = y * 8 + x;
221 for (unsigned yb = 0; yb < HEIGHT; yb += 16) {
222 optional<uint32_t> num_rans_bytes = read_varint(&ptr, end);
223 if (!num_rans_bytes) {
224 fprintf(stderr, "Error parsing varint for block %d rANS bytes\n", yb);
228 CoeffStream *stream = &streams[coeff_num * num_blocks + (yb/16)];
229 stream->src_offset = ptr - coded.data();
230 stream->src_len = *num_rans_bytes;
233 ptr += *num_rans_bytes;
235 //printf("read %d rANS bytes, %d sign bytes\n", *num_rans_bytes, *num_sign_bytes);
240 // put the coded data (as a whole) into an SSBO
241 printf("%d err=0x%x bufsize=%zu\n", __LINE__, glGetError(), coded.size());
243 GLuint ssbo_stream, ssbo, ssbo_out;
245 glGenBuffers(1, &ssbo_stream);
246 glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo_stream);
247 glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(streams), streams, GL_STREAM_DRAW);
248 glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo_stream);
249 printf("%d err=0x%x bufsize=%zu\n", __LINE__, glGetError(), coded.size());
251 glGenBuffers(1, &ssbo);
252 glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
253 glBufferData(GL_SHADER_STORAGE_BUFFER, coded.size(), coded.data(), GL_STREAM_DRAW);
254 glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 9, ssbo);
255 printf("%d err=0x%x bufsize=%zu\n", __LINE__, glGetError(), coded.size());
257 glGenBuffers(1, &ssbo_out);
258 glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo_out);
259 glBufferData(GL_SHADER_STORAGE_BUFFER, 65536, nullptr, GL_STREAM_DRAW); // ??
260 glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 10, ssbo_out);
263 #define PARALLEL_SLICES 1
264 steady_clock::time_point start = steady_clock::now();
265 for (int i = 0; i < 1000; ++i)
266 glDispatchCompute(1, (45+PARALLEL_SLICES-1)/PARALLEL_SLICES, 1);
269 steady_clock::time_point now = steady_clock::now();
271 unsigned *timing = (unsigned *)glMapBufferRange(GL_SHADER_STORAGE_BUFFER, 0, 65536, GL_MAP_READ_BIT);
272 //setlocale(LC_ALL, "nb_NO.UTF-8");
278 "barrier after rANS decode",
280 "barrier after horizontal IDCT",
283 "barrier after store to texture",
284 "dummy timer for overhead measurement",
287 for (int i = 0; i < 10; ++i) {
288 //printf("%d: %'18.0f [%s]\n", i, double((uint64_t(timing[i * 2 + 1]) << 32) | timing[i * 2]), phases[i].c_str());
289 printf("%d,%s", i, phases[i].c_str());
290 for (int j = 0; j < 512; ++j) {
291 int idx = (j * 10 + i) * 2;
292 uint64_t val = (uint64_t(timing[idx + 1]) << 32) | timing[idx];
293 // printf(" %'18.0f", double(val));
294 // printf(" %'6.0f", double(val) * 1e-6);
295 printf(",%.0f", double(val) * 1e-6);
298 //printf(" [%s]\n", phases[i].c_str());
302 unsigned char *data = new unsigned char[1280 * 720];
303 glGetTexImage(GL_TEXTURE_2D, 0, GL_RED, GL_UNSIGNED_BYTE, data);
305 printf("%d err=0x%x bufsize=%zu\n", __LINE__, glGetError(), coded.size());
308 for (int k = 0; k < 4; ++k) {
309 for (int y = 0; y < 8; ++y) {
310 for (int x = 0; x < 8; ++x) {
311 printf("%3d ", data[y * 1280 + x + k*8]);
319 for (int k = 0; k < 4; ++k) {
320 for (int y = 0; y < 8; ++y) {
321 for (int x = 0; x < 8; ++x) {
322 //printf("%5.2f ", data[(y+8) * 1280 + x + (1272-k*8)]);
323 printf("%3d ", data[y * 1280 + x + k*8]);
332 FILE *fp = fopen("narabu.pgm", "wb");
333 fprintf(fp, "P5\n1280 720\n255\n");
334 for (int y = 0; y < 720; ++y) {
335 for (int x = 0; x < 1280; ++x) {
336 int k = lrintf(data[y * 1280 + x]);
338 if (k > 255) k = 255;
344 int16_t *coeff_data = new int16_t[1280 * 720];
345 glBindTexture(GL_TEXTURE_2D, coeff_tex);
347 glGetTexImage(GL_TEXTURE_2D, 0, GL_RED_INTEGER, GL_SHORT, coeff_data);
349 for (int k = 0; k < 4; ++k) {
350 for (int y = 0; y < 8; ++y) {
351 for (int x = 0; x < 8; ++x) {
352 printf("%3d ", coeff_data[y * 1280 + x + k*8]);
362 glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0); // unbind
364 printf("foo = 0x%x\n", glGetError());
365 printf("Each iteration took %.3f ms.\n", 1e3 * duration<double>(now - start).count() / 1000);