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render.c
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render.c
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#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <dirent.h>
#include <math.h>
#include <time.h>
#include <pthread.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "glad.h"
#include "render.h"
#include "xwin.h"
#include "glsl_ext.h"
typeof(bind_types) bind_types = {
[STDIN_TYPE_NONE] = { .n = "NONE", .i = STDIN_TYPE_NONE },
[STDIN_TYPE_INT] = { .n = "int", .i = STDIN_TYPE_INT },
[STDIN_TYPE_FLOAT] = { .n = "float", .i = STDIN_TYPE_FLOAT },
[STDIN_TYPE_BOOL] = { .n = "bool", .i = STDIN_TYPE_BOOL },
[STDIN_TYPE_VEC2] = { .n = "vec2", .i = STDIN_TYPE_VEC2 },
[STDIN_TYPE_VEC3] = { .n = "vec3", .i = STDIN_TYPE_VEC3 },
[STDIN_TYPE_VEC4] = { .n = "vec4", .i = STDIN_TYPE_VEC4 },
{}
};
/* The following macros are some black magic that allow the use of
by-reference C closures in both Clang and GCC. Their behaviour
differs slightly so please read up on both nested GCC functions
and Clang blocks if you are going to use these. */
#if defined(__clang__)
#define MUTABLE __block
#define INLINE(t, x) MUTABLE __auto_type x = ^t
#else
#define MUTABLE
#define INLINE(t, x) t x
#endif
#if defined(__clang__)
static void* block_storage;
#define RHANDLER(name, args, ...) \
({ block_storage = ^(const char* name, void** args) __VA_ARGS__; \
(typeof(^(const char* name, void** args) __VA_ARGS__)) block_storage; })
#define CLOSURE(ret, ...) ({ block_storage = ^ret __VA_ARGS__; \
(typeof(^ret __VA_ARGS__)) block_storage; })
#elif defined(__GNUC__) || defined(__GNUG__)
#define RHANDLER(name, args, ...) \
({ void _handler(const char* name, void** args) __VA_ARGS__ _handler; })
#define CLOSURE(ret, ...) ({ ret _handler __VA_ARGS__; _handler; })
#else
#error "no nested function/block syntax available"
#endif
#define TWOPI 6.28318530718
#define PI 3.14159265359
#define swap(a, b) do { __auto_type tmp = a; a = b; b = tmp; } while (0)
#define IB_START_LEFT 0
#define IB_END_LEFT 1
#define IB_START_RIGHT 2
#define IB_END_RIGHT 3
#define IB_WORK_LEFT 4
#define IB_WORK_RIGHT 5
/* Only a single vertex shader is needed, since all rendering
is done in the fragment shader over a fullscreen quad */
#define VERTEX_SHADER_SRC \
"layout(location = 0) in vec3 pos; void main() { gl_Position = vec4(pos.x, pos.y, 0.0F, 1.0F); }"
/* Should be defined from meson */
#ifndef GLAVA_RESOURCE_PATH
#define GLAVA_RESOURCE_PATH "../resources/"
#endif
bool glad_instantiated = false;
struct gl_wcb* wcbs[2] = {};
static size_t wcbs_idx = 0;
static inline void register_wcb(struct gl_wcb* wcb) { wcbs[wcbs_idx++] = wcb; }
#define DECL_WCB(N) \
do { \
extern struct gl_wcb N; \
register_wcb(&N); \
} while (0)
/* GLSL bind source */
struct gl_bind_src {
const char* name;
int type;
int src_type;
};
/* Function that can be applied to uniform binds */
struct gl_transform {
const char* name;
int type;
void (*apply)(struct gl_data*, void**, void* data);
bool opt; /* true if the transform is a post-FFT transformation */
};
/* Data for sampler1D */
struct gl_sampler_data {
float* buf;
size_t sz;
};
/* Per-bind data containing the framebuffer and 1D texture to render
for smoothing or averaging output */
struct sm_fb {
GLuint fbo, tex;
};
/* Per-bind data containing the framebuffer and textures gravity output.
There are multiple output framebuffers for GLSL frame averaging */
struct gr_fb {
struct sm_fb* out;
size_t out_sz;
size_t out_idx;
};
/* GLSL uniform bind */
struct gl_bind {
const char* name;
GLuint uniform;
int type;
int src_type;
void (**transformations)(struct gl_data*, void**, void* data);
size_t t_sz;
struct sm_fb sm, av, gr_store;
struct gr_fb gr;
bool optimize_fft;
};
/* GL screen framebuffer object */
struct gl_sfbo {
GLuint fbo, tex, shader, stdin_uniform;
bool indirect, nativeonly;
const char* name;
struct gl_bind* binds;
GLuint* pipe_uniforms;
size_t binds_sz;
};
/* data for screen-space overlay (quad) */
struct overlay_data {
GLuint vbuf, vao;
};
struct gl_data {
struct gl_sfbo* stages;
struct overlay_data overlay;
GLuint audio_tex_r, audio_tex_l, bg_tex, sm_prog, av_prog, gr_prog, p_prog;
size_t stages_sz, bufscale, avg_frames;
void* w;
struct gl_wcb* wcb;
int lww, lwh, lwx, lwy; /* last window dimensions */
int rate; /* framerate */
double tcounter;
float time, timecycle;
int fcounter, ucounter, kcounter;
bool print_fps, avg_window, interpolate, interpolate_glsl, force_geometry,
force_raised, copy_desktop, smooth_pass, premultiply_alpha, check_fullscreen,
clickthrough, mirror_input, accel_fft;
void** t_data;
size_t t_count;
float gravity_step, target_spu, fr, ur, smooth_distance, smooth_ratio,
smooth_factor, fft_scale, fft_cutoff;
struct {
float r, g, b, a;
} clear_color;
float* interpolate_buf[6];
int geometry[4];
int stdin_type;
struct rd_bind* binds;
GLuint bg_prog, bg_utex, bg_screen;
bool bg_setup;
GLuint sm_utex, sm_usz, sm_uw,
gr_utex, gr_udiff,
p_utex;
GLuint* av_utex;
bool test_mode;
struct gl_sfbo off_sfbo;
#ifdef GLAVA_DEBUG
struct {
float r, g, b, a;
} test_eval_color;
bool debug_verbose;
bool assigned_debug_cb;
#endif
};
bool rd_get_test_mode(struct glava_renderer* r) {
struct gl_data* gl = r->gl;
return gl->test_mode;
}
/* load shader file */
static GLuint shaderload(const char* rpath,
GLenum type,
const char* shader,
const char* config,
const char* defaults,
struct request_handler* handlers,
int shader_version,
bool raw,
bool* skipped,
struct gl_data* gl) {
size_t s_len = strlen(shader);
/* Path buffer for error message mapping */
char path[raw ? 2 : strlen(rpath) + s_len + 2];
if (raw) {
path[0] = '*';
path[1] = '\0';
}
struct stat st;
int fd = -1;
if (!raw) {
snprintf(path, sizeof(path) / sizeof(char), "%s/%s", shader, rpath);
fd = open(path, O_RDONLY);
if (fd == -1) {
fprintf(stderr, "failed to load shader '%s': %s\n", path, strerror(errno));
return 0;
}
fstat(fd, &st);
}
GLint max_uniforms;
glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max_uniforms);
const GLchar* map = raw ? shader : mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
char* bind_header = malloc(1);
bind_header[0] = '\0';
size_t bh_idx = 0;
const char* fmt = "uniform %s _IN_%s;\n";
/* Construct pipe binding header (containing uniforms) */
for (struct rd_bind* bd = gl->binds; bd->name != NULL; ++bd) {
size_t inc = snprintf(NULL, 0, fmt, bd->stype, bd->name);
bind_header = realloc(bind_header, bh_idx + inc + 1);
snprintf(bind_header + bh_idx, inc + 1, fmt, bd->stype, bd->name);
bh_idx += inc;
}
/* Append to header entries with a #define for each `#expand` control */
MUTABLE char* efmt_header = malloc(1);
MUTABLE size_t efmt_idx = 0;
INLINE(void, append_efmt)(const char* n, size_t v) {
size_t inc = snprintf(NULL, 0, "#define %s %d\n", n, (int) v);
efmt_header = realloc(efmt_header, efmt_idx + inc + 1);
snprintf(efmt_header + efmt_idx, inc + 1, "#define %s %d\n", n, (int) v);
efmt_idx += inc;
};
/* Create `#expand` header entry, using the above closure */
#define EBIND(n, v) \
({ \
struct glsl_ext_efunc ret = \
{ .name = n, .call = CLOSURE(size_t, (void) { return v; })}; \
append_efmt(n, v); \
ret; \
})
struct glsl_ext_efunc efuncs[] = {
EBIND("_AVG_FRAMES", gl->avg_frames ),
EBIND("_AVG_WINDOW", (int) gl->avg_window ),
EBIND("_USE_ALPHA", 1 ),
EBIND("_PREMULTIPLY_ALPHA", gl->premultiply_alpha ? 1 : 0),
EBIND("_CHANNELS", gl->mirror_input ? 1 : 2 ),
EBIND("_UNIFORM_LIMIT", (int) max_uniforms ),
EBIND("_PRE_SMOOTHED_AUDIO", gl->smooth_pass ? 1 : 0 ),
{ .name = NULL }
};
#undef EBIND
size_t pad = bh_idx + efmt_idx;
struct glsl_ext ext = {
.source = raw ? NULL : map,
.source_len = raw ? 0 : st.st_size,
.cd = shader,
.cfd = config,
.dd = defaults,
.handlers = handlers,
.processed = (char*) (raw ? shader : NULL),
.p_len = raw ? s_len : 0,
.binds = gl->binds,
.efuncs = efuncs
};
/* If this is raw input, skip processing */
if (!raw) ext_process(&ext, rpath);
/* Format GLSL header with defines, pipe bindings, and expand constants. */
static const GLchar* header_fmt =
"#version %d\n"
"#define _SMOOTH_FACTOR %.6f\n"
"#define USE_STDIN %d\n"
"#if USE_STDIN == 1\n"
"uniform %s STDIN;\n"
"#endif\n" "%s\n" "%s";
size_t blen = strlen(header_fmt) + 32 + pad;
GLchar* buf = malloc((blen * sizeof(GLchar*)) + ext.p_len);
int written = snprintf(buf, blen, header_fmt, (int) shader_version,
(double) gl->smooth_factor, gl->stdin_type != STDIN_TYPE_NONE,
bind_types[gl->stdin_type].n, bind_header, efmt_header);
if (written < 0) {
fprintf(stderr, "snprintf() encoding error while prepending header to shader '%s'\n", path);
return 0;
}
memcpy(buf + written, ext.processed, ext.p_len);
if (!raw) munmap((void*) map, st.st_size);
GLuint s = glCreateShader(type);
GLint sl = (GLint) (ext.p_len + written);
glShaderSource(s, 1, (const GLchar* const*) &buf, &sl);
switch (glGetError()) {
case GL_INVALID_VALUE:
fprintf(stderr, "invalid value while loading shader source\n");
glava_abort();
return 0;
case GL_INVALID_OPERATION:
fprintf(stderr, "invalid operation while loading shader source\n");
glava_abort();
return 0;
default: {}
}
glCompileShader(s);
GLint ret, ilen;
glGetShaderiv(s, GL_COMPILE_STATUS, &ret);
if (ret == GL_FALSE) {
glGetShaderiv(s, GL_INFO_LOG_LENGTH, &ilen);
if (ilen) {
GLchar* ebuf = malloc(sizeof(GLchar) * ilen);
glGetShaderInfoLog(s, ilen, NULL, ebuf);
/* check for `#error __disablestage` and flag `*skipped` accordingly */
if (skipped != NULL) {
bool last = false;
static const char* skip_keyword = "__disablestage";
size_t sksz = sizeof(skip_keyword);
for(size_t t = 0; t < (size_t) ilen; ++t) {
if (ebuf[t] == '_') {
if (last && !strncmp(ebuf + t - 1, skip_keyword, sksz)) {
*skipped = true;
goto free_ebuf;
} else last = true;
} else last = false;
}
}
fprintf(stderr, "Shader compilation failed for '%s':\n", path);
int ln_start = 0, col_start = 0;
for (int i = 0; i < ilen; ++i) {
switch (ebuf[i]) {
newline:
case '\n': {
int ret = -1, sz = (i - ln_start) + 1;
char fmt[] = { '%', '0' + (sz > 9 ? 9 : sz), 'd', '\0' };
if (ext.ss_lookup && sscanf(ebuf + ln_start, fmt, &ret) > 0) {
fprintf(stderr, "\"%s\":", ext.ss_lookup[ret]);
}
sz -= col_start - ln_start;
if (sz > 0)
fwrite(ebuf + col_start, sizeof(GLchar), sz, stderr);
ln_start = i + 1;
col_start = ln_start;
break;
}
case ':':
if (col_start <= ln_start)
col_start = i + 1;
default:
if (i == ilen - 1) goto newline;
break;
}
}
#ifdef GLAVA_DEBUG
if (gl->debug_verbose) {
fprintf(stderr, "Processed shader source for '%s':\n", path);
fwrite(buf, sizeof(GLchar), sl, stderr);
}
#endif
free_ebuf:
free(ebuf);
return 0;
} else {
fprintf(stderr, "Shader compilation failed for '%s', but no info was available\n", path);
return 0;
}
}
if (!raw) ext_free(&ext);
free(buf);
close(fd);
return s;
}
/* link shaders */
#define shaderlink(...) shaderlink_f((GLuint[]) {__VA_ARGS__, 0})
static GLuint shaderlink_f(GLuint* arr) {
GLuint f, p;
int i = 0;
if ((p = glCreateProgram()) == 0) {
fprintf(stderr, "failed to create program\n");
abort();
}
while ((f = arr[i++]) != 0) {
glAttachShader(p, f);
switch (glGetError()) {
case GL_INVALID_VALUE:
fprintf(stderr, "tried to pass invalid value to glAttachShader\n");
return 0;
case GL_INVALID_OPERATION:
fprintf(stderr, "shader is already attached, or argument types "
"were invalid when calling glAttachShader\n");
return 0;
default: {}
}
}
glLinkProgram(p);
GLint ret, ilen;
glGetProgramiv(p, GL_LINK_STATUS, &ret);
if (ret == GL_FALSE) {
glGetProgramiv(p, GL_INFO_LOG_LENGTH, &ilen);
if (ilen) {
GLchar buf[ilen];
glGetProgramInfoLog(p, ilen, NULL, buf);
fprintf(stderr, "Shader linking failed for program %d:\n", (int) p);
fwrite(buf, sizeof(GLchar), ilen - 1, stderr);
return 0;
} else {
fprintf(stderr, "Shader linking failed for program %d, but no info was available\n", (int) p);
return 0;
}
}
return p;
}
/* load shaders */
#define shaderbuild(gl, shader_path, c, d, r, v, s, ...) \
shaderbuild_f(gl, shader_path, c, d, r, v, s, (const char*[]) {__VA_ARGS__, 0})
static GLuint shaderbuild_f(struct gl_data* gl,
const char* shader_path,
const char* config, const char* defaults,
struct request_handler* handlers,
int shader_version,
bool* skipped,
const char** arr) {
if (skipped) *skipped = false;
const char* str;
int i = 0, sz = 0, t;
while ((str = arr[i++]) != NULL) ++sz;
GLuint shaders[sz + 2];
shaders[sz + 1] = 0;
for (i = 0; i < sz; ++i) {
const char* path = arr[i];
size_t len = strlen(path);
for (t = len - 2; t >= 0; --t) {
if (path[t] == '.') {
if (!strcmp(path + t + 1, "frag") || !strcmp(path + t + 1, "glsl")) {
if (!(shaders[i] = shaderload(path, GL_FRAGMENT_SHADER,
shader_path, config, defaults, handlers,
shader_version, false, skipped, gl))) {
return 0;
}
} else if (!strcmp(path + t + 1, "vert")) {
fprintf(stderr, "shaderbuild(): vertex shaders not allowed: %s\n", path);
abort();
} else {
fprintf(stderr, "shaderbuild(): invalid file extension: %s\n", path);
abort();
}
break;
}
}
}
/* load builtin vertex shader */
shaders[sz] = shaderload(NULL, GL_VERTEX_SHADER, VERTEX_SHADER_SRC,
NULL, NULL, handlers, shader_version, true, NULL, gl);
fflush(stdout);
return shaderlink_f(shaders);
}
static GLuint create_1d_tex() {
GLuint tex;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_1D, tex);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_REPEAT);
return tex;
}
static void update_1d_tex(GLuint tex, size_t w, float* data) {
glBindTexture(GL_TEXTURE_1D, tex);
glTexImage1D(GL_TEXTURE_1D, 0, GL_R16, w, 0, GL_RED, GL_FLOAT, data);
}
#define BIND_VEC2 0
#define BIND_VEC3 1
#define BIND_VEC4 2
#define BIND_IVEC2 3
#define BIND_IVEC3 4
#define BIND_IVEC4 5
#define BIND_INT 6
#define BIND_FLOAT 7
#define BIND_SAMPLER1D 8
#define BIND_SAMPLER2D 9
/* setup screen framebuffer object and its texture */
static void setup_sfbo(struct gl_sfbo* s, int w, int h) {
GLuint tex = s->indirect ? s->tex : ({ glGenTextures(1, &s->tex); s->tex; });
GLuint fbo = s->indirect ? s->fbo : ({ glGenFramebuffers(1, &s->fbo); s->fbo; });
s->indirect = true;
/* bind texture and setup space */
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
/* setup and bind framebuffer to texture */
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
switch (glCheckFramebufferStatus(GL_FRAMEBUFFER)) {
case GL_FRAMEBUFFER_COMPLETE: break;
default:
fprintf(stderr, "error in frambuffer state\n");
abort();
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
static void overlay(struct overlay_data* d) {
GLfloat buf[18];
buf[0] = -1.0f; buf[1] = -1.0f; buf[2] = 0.0f;
buf[3] = 1.0f; buf[4] = -1.0f; buf[5] = 0.0f;
buf[6] = -1.0f; buf[7] = 1.0f; buf[8] = 0.0f;
buf[9] = 1.0f; buf[10] = 1.0f; buf[11] = 0.0f;
buf[12] = 1.0f; buf[13] = -1.0f; buf[14] = 0.0f;
buf[15] = -1.0f; buf[16] = 1.0f; buf[17] = 0.0f;
glGenBuffers(1, &d->vbuf);
glBindBuffer(GL_ARRAY_BUFFER, d->vbuf);
glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 18, buf, GL_STATIC_DRAW);
glGenVertexArrays(1, &d->vao);
glBindVertexArray(d->vao);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, d->vbuf);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*) 0);
glDisableVertexAttribArray(0);
glBindVertexArray(0);
}
static void drawoverlay(const struct overlay_data* d) {
glBindVertexArray(d->vao);
glEnableVertexAttribArray(0);
glDrawArrays(GL_TRIANGLES, 0, 6);
glDisableVertexAttribArray(0);
glBindVertexArray(0);
}
#define TRANSFORM_NONE 0
#define TRANSFORM_FFT 1
#define TRANSFORM_WINDOW 2
#ifdef GLAD_DEBUG
struct err_msg {
GLenum code;
const char* msg;
const char* cname;
};
#define CODE(c) .code = c, .cname = #c
static const struct err_msg err_lookup[] = {
{ CODE(GL_INVALID_ENUM), .msg = "Invalid enum parameter" },
{ CODE(GL_INVALID_VALUE), .msg = "Invalid value parameter" },
{ CODE(GL_INVALID_OPERATION), .msg = "Invalid operation" },
{ CODE(GL_STACK_OVERFLOW), .msg = "Stack overflow" },
{ CODE(GL_STACK_UNDERFLOW), .msg = "Stack underflow" },
{ CODE(GL_OUT_OF_MEMORY), .msg = "Out of memory" },
{ CODE(GL_INVALID_FRAMEBUFFER_OPERATION), .msg = "Out of memory" },
#ifdef GL_CONTEXT_LOSS
{ CODE(GL_CONTEXT_LOSS), .msg = "Context loss (graphics device or driver reset?)" }
#endif
};
#undef CODE
static void glad_debugcb(const char* name, void *funcptr, int len_args, ...) {
GLenum err = glad_glGetError();
if (err != GL_NO_ERROR) {
const char* cname = "?", * msg = "Unknown error code";
for (size_t t = 0; t < sizeof(err_lookup) / sizeof(struct err_msg); ++t) {
if (err_lookup[t].code == err) {
cname = err_lookup[t].cname;
msg = err_lookup[t].msg;
break;
}
}
fprintf(stderr, "glGetError(): %d (%s) in %s: '%s'\n",
(int) err, cname, name, msg);
abort();
}
}
#endif
#define SHADER_EXT_VERT "vert"
#define SHADER_EXT_FRAG "frag"
static struct gl_bind_src bind_sources[] = {
#define SRC_PREV 0
{ .name = "prev", .type = BIND_SAMPLER2D, .src_type = SRC_PREV },
#define SRC_AUDIO_L 1
{ .name = "audio_l", .type = BIND_SAMPLER1D, .src_type = SRC_AUDIO_L },
#define SRC_AUDIO_R 2
{ .name = "audio_r", .type = BIND_SAMPLER1D, .src_type = SRC_AUDIO_R },
#define SRC_AUDIO_SZ 3
{ .name = "audio_sz", .type = BIND_INT, .src_type = SRC_AUDIO_SZ },
#define SRC_SCREEN 4
{ .name = "screen", .type = BIND_IVEC2, .src_type = SRC_SCREEN },
#define SRC_TIME 5
{ .name = "time", .type = BIND_FLOAT, .src_type = SRC_SCREEN }
};
#define window(t, sz) (0.53836 - (0.46164 * cos(TWOPI * (double) t / (double) sz)))
#define window_frame(t, sz) (0.6 - (0.4 * cos(TWOPI * (double) t / (double) sz)))
#define ALLOC_ONCE(u, udata, sz) \
if (*udata == NULL) { \
u = calloc(sz, sizeof(typeof(*u))); \
*udata = u; \
} else u = (typeof(u)) *udata;
/* type generic clamp/min/max, like in GLSL */
#define clamp(v, min, max) \
({ \
__auto_type _v = v; \
if (_v < min) _v = min; \
else if (_v > max) _v = max; \
_v; \
})
#define min(a0, b0) \
({ \
__auto_type _a = a0; \
__auto_type _b = b0; \
_a < _b ? _a : _b; \
})
#define max(a0, b0) \
({ \
__auto_type _a = a0; \
__auto_type _b = b0; \
_a > _b ? _a : _b; \
})
#define E 2.7182818284590452353
void transform_smooth(struct gl_data* d, void** _, void* data) {
struct gl_sampler_data* s = (struct gl_sampler_data*) data;
float* b = s->buf;
size_t
sz = s->sz,
asz = (size_t) ceil(s->sz / d->smooth_ratio);
for (int t = 0; t < asz; ++t) {
float
db = log(t), /* buffer index on log scale */
avg = 0; /* adj value averages (weighted) */
/* Calculate real indexes for sampling at this position, since the
distance is specified in scalar values */
int smin = (int) floor(powf(E, max(db - d->smooth_distance, 0)));
int smax = min((int) ceil(powf(E, db + d->smooth_distance)), (int) sz - 1);
int count = 0;
for (int s = smin; s <= smax; ++s) {
if (b[s]) {
avg += b[s] /* / abs(powf(10, db + (t - s))) */;
count++;
}
}
avg /= count;
b[t] = avg;
}
}
void transform_gravity(struct gl_data* d, void** udata, void* data) {
struct gl_sampler_data* s = (struct gl_sampler_data*) data;
float* b = s->buf;
size_t sz = s->sz, t;
float* applied;
ALLOC_ONCE(applied, udata, sz);
float g = d->gravity_step * (1.0F / d->ur);
for (t = 0; t < sz; ++t) {
if (b[t] >= applied[t]) {
applied[t] = b[t] - g;
} else applied[t] -= g;
b[t] = applied[t];
}
}
void transform_average(struct gl_data* d, void** udata, void* data) {
struct gl_sampler_data* s = (struct gl_sampler_data*) data;
float* b = s->buf;
size_t sz = s->sz, t, f;
size_t tsz = sz * d->avg_frames;
float v;
bool use_window = d->avg_window;
float* bufs;
ALLOC_ONCE(bufs, udata, tsz);
/* TODO: optimize into circle buffer */
memmove(bufs, &bufs[sz], (tsz - sz) * sizeof(float));
memcpy(&bufs[tsz - sz], b, sz * sizeof(float));
#define DO_AVG(w) \
do { \
for (t = 0; t < sz; ++t) { \
v = 0.0F; \
for (f = 0; f < d->avg_frames; ++f) { \
v += w * bufs[(f * sz) + t]; \
} \
b[t] = v / d->avg_frames; \
} \
} while (0)
if (use_window)
DO_AVG(window_frame(f, d->avg_frames - 1));
else
DO_AVG(1);
#undef DO_AVG
}
void transform_wrange(struct gl_data* d, void** _, void* data) {
struct gl_sampler_data* s = (struct gl_sampler_data*) data;
float* b = s->buf;
size_t sz = s->sz, t;
for (t = 0; t < sz; ++t) {
b[t] += 1.0F;
b[t] /= 2.0F;
}
}
void transform_fft(struct gl_data* d, void** _, void* in) {
struct gl_sampler_data* s = (struct gl_sampler_data*) in;
float* data = s->buf;
unsigned long nn = (unsigned long) (s->sz / 2);
unsigned long n, mmax, m, j, istep, i;
float wtemp, wr, wpr, wpi, wi, theta;
float tempr, tempi;
/* apply window */
for (i = 0; i < s->sz; ++i) {
data[i] *= window(i, s->sz - 1);
}
/* reverse-binary reindexing */
n = nn << 1;
j = 1;
for (i = 1; i < n; i += 2) {
if (j > i) {
swap(data[j-1], data[i-1]);
swap(data[j], data[i]);
}
m = nn;
while (m >= 2 && j > m) {
j -= m;
m >>= 1;
}
j += m;
};
/* here begins the Danielson-Lanczos section */
mmax = 2;
while (n > mmax) {
istep = mmax << 1;
theta = -(2 * M_PI / mmax);
wtemp = sin(0.5 * theta);
wpr = -2.0 * wtemp * wtemp;
wpi = sin(theta);
wr = 1.0;
wi = 0.0;
for (m = 1; m < mmax; m += 2) {
for (i = m; i <= n; i += istep) {
j= i + mmax;
tempr = wr * data[j-1] - wi * data[j];
tempi = wr * data[j] + wi * data[j-1];
data[j-1] = data[i-1] - tempr;
data[j] = data[i] - tempi;
data[i-1] += tempr;
data[i] += tempi;
}
wtemp = wr;
wr += wr * wpr - wi * wpi;
wi += wi * wpr + wtemp * wpi;
}
mmax = istep;
}
/* abs and log scale */
for (n = 0; n < s->sz; ++n) {
if (data[n] < 0.0F) data[n] = -data[n];
data[n] = log(data[n] + 1) / 3;
data[n] *= max((((float) n / (float) s->sz) * d->fft_scale) + (1.0F - d->fft_cutoff), 1.0F);
}
}
static struct gl_transform transform_functions[] = {
{ .name = "window", .type = BIND_SAMPLER1D, .apply = NULL },
{ .name = "fft", .type = BIND_SAMPLER1D, .apply = transform_fft },
{ .name = "wrange", .type = BIND_SAMPLER1D, .apply = transform_wrange },
{ .name = "avg", .type = BIND_SAMPLER1D, .apply = NULL },
{ .name = "gravity", .type = BIND_SAMPLER1D, .apply = NULL },
{ .name = "smooth", .type = BIND_SAMPLER1D, .apply = transform_smooth }
};
static struct gl_bind_src* lookup_bind_src(const char* str) {
for (size_t t = 0; t < sizeof(bind_sources) / sizeof(struct gl_bind_src); ++t) {
if (!strcmp(bind_sources[t].name, str)) {
return &bind_sources[t];
}
}
return NULL;
}
struct glava_renderer* rd_new(const char** paths, const char* entry,
const char** requests, const char* force_backend,
struct rd_bind* bindings, int stdin_type,
bool auto_desktop, bool verbose,
bool test_mode) {
xwin_wait_for_wm();
MUTABLE glava_renderer* r = malloc(sizeof(struct glava_renderer));
*r = (struct glava_renderer) {
.alive = true,
.mirror_input = false,
.gl = malloc(sizeof(struct gl_data)),
.bufsize_request = 8192,
.rate_request = 22000,
.samplesize_request = 1024,
.audio_source_request = NULL,
.off_tex = 0,
.lock = PTHREAD_MUTEX_INITIALIZER,
.cond = PTHREAD_COND_INITIALIZER,
.sizereq_flag = 0,
.flag = false
};
pthread_mutex_lock(&r->lock);
MUTABLE struct gl_data* gl = r->gl;
*gl = (struct gl_data) {
.w = NULL,
.wcb = NULL,
.stages = NULL,
.rate = 0,
.tcounter = 0.0,
.fcounter = 0,
.ucounter = 0,
.kcounter = 0,
.time = 0.0F,
.timecycle = 60.0F,
.fr = 1.0F,
.ur = 1.0F,
.print_fps = true,
.bufscale = 1,
.avg_frames = 6,
.avg_window = true,
.gravity_step = 4.2,
.interpolate = true,
.interpolate_glsl = false,
.force_geometry = false,
.force_raised = false,
.smooth_factor = 0.025,
.smooth_distance = 0.01,
.smooth_ratio = 4,
.bg_tex = 0,
.sm_prog = 0,
.av_prog = 0,
.gr_prog = 0,
.p_prog = 0,
.copy_desktop = true,
.premultiply_alpha = true,
.mirror_input = false,
.accel_fft = true,
.check_fullscreen = false,
.smooth_pass = true,
.fft_scale = 10.2F,
.fft_cutoff = 0.3F,
.geometry = { 0, 0, 500, 400 },
.clear_color = { 0.0F, 0.0F, 0.0F, 0.0F },
.interpolate_buf = { [0] = NULL },
.clickthrough = false,
.stdin_type = stdin_type,
.binds = bindings,
.bg_setup = false,
.test_mode = test_mode,
.off_sfbo = {
.name = "test",
.shader = 0,
.indirect = false,
.nativeonly = false,
.binds = NULL,
.binds_sz = 0
},
#ifdef GLAVA_DEBUG
.test_eval_color = { 0.0F, 0.0F, 0.0F, 0.0F },
.debug_verbose = verbose,
.assigned_debug_cb = false,
#endif
};
bool forced = force_backend != NULL;
const char* backend = force_backend;
/* Window creation backend interfaces */
if (wcbs_idx == 0) {
#ifdef GLAVA_GLFW
DECL_WCB(wcb_glfw);
#endif
#ifdef GLAVA_GLX
DECL_WCB(wcb_glx);
#endif
}
#ifdef GLAVA_GLFW
if (!forced) backend = "glfw";
#endif
#ifdef GLAVA_GLX
if (!forced && getenv("DISPLAY")) {
backend = "glx";
}
#endif
if (!backend) {
fprintf(stderr, "No backend available for the active windowing system\n");
if (wcbs_idx == 0) {
fprintf(stderr, "None have been compiled into this build.\n");
} else {
fprintf(stderr, "Available backends:\n");
for (size_t t = 0; t < wcbs_idx; ++t) {
fprintf(stderr, "\t\"%s\"\n", wcbs[t]->name);
}
}
glava_abort();
}
if (verbose) printf("Using backend: '%s'\n", backend);
for (size_t t = 0; t < wcbs_idx; ++t) {
if (wcbs[t]->name && !strcmp(wcbs[t]->name, backend)) {
gl->wcb = wcbs[t];
break;
}
};