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268 lines
9.6 KiB
C
268 lines
9.6 KiB
C
#include "demo.h"
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#include <pthread.h>
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#include <stdatomic.h>
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// this can take a long time, especially in large terminals; we cap execution
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// at fifteen seconds (the true intended runtime), and drop frames when behind.
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#define MAX_SECONDS 15
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// issue #2390 adds ncvisual_frame_count(). until then...FIXME
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#define VIDEO_FRAMES 862
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static const char* leg[] = {
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" 88 88 88 88 88 88 88 ",
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" \"\" 88 88 88 88 \"\" \"\" ,d ",
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" 88 88 88 88 88 ",
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" ,adPPYYba, 8b,dPPYba, 88 ,adPPYba, 88 ,d8 88,dPPYba, 88 ,adPPYYba, ,adPPYba, 88 ,d8 88 ,adPPYba, 88 8b,dPPYba, MM88MMM ",
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" \"\" `Y8 88P' `\"8a 88 a8\" \"\" 88 ,a8\" 88P' \"8a 88 \"\" `Y8 a8\" \"\" 88 ,a8\" 88 a8\" \"8a 88 88P' `\"8a 88 ",
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" ,adPPPPP88 88 88 88 8b 8888[ 88 d8 88 ,adPPPPP88 8b 8888[ 88 8b d8 88 88 88 88 ",
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" 88, ,88 88 88 88 \"8a, ,aa 88`\"Yba, 88b, ,a8\" 88 88, ,88 \"8a, ,aa 88`\"Yba, 88 \"8a, ,a8\" 88 88 88 88, ",
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" `\"8bbdP\"Y8 88 88 88 `\"Ybbd8\"' 88 `Y8a 8Y\"Ybbd8\"' 88 `\"8bbdP\"Y8 `\"Ybbd8\"' 88 `Y8a 88 `\"YbbdP\"' 88 88 88 \"Y888 ",
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" ,88 ",
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" 888P ",
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};
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static struct ncplane*
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make_slider(struct notcurses* nc, int dimx){
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const int len = strlen(leg[0]);
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// 862 frames in the video
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const int REPS = 862 / len + dimx / len + 2;
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struct ncplane_options nopts = {
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.y = 1,
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.x = 0,
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.rows = sizeof(leg) / sizeof(*leg),
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.cols = len * REPS,
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.name = "scrl",
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};
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struct ncplane* n = ncplane_create(notcurses_stdplane(nc), &nopts);
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uint64_t channels = 0;
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ncchannels_set_fg_alpha(&channels, NCALPHA_TRANSPARENT);
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ncchannels_set_bg_alpha(&channels, NCALPHA_TRANSPARENT);
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ncplane_set_base(n, " ", 0, channels);
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ncplane_set_scrolling(n, true);
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int r = 0x5f;
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int g = 0xaf;
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int b = 0x84;
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ncplane_set_bg_alpha(n, NCALPHA_TRANSPARENT);
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for(int x = 0 ; x < REPS ; ++x){
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for(size_t l = 0 ; l < sizeof(leg) / sizeof(*leg) ; ++l){
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ncplane_set_fg_rgb8_clipped(n, r + 0x8 * l, g + 0x8 * l, b + 0x8 * l);
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if(ncplane_set_bg_rgb8(n, (l + 1) * 0x2, 0x20, (l + 1) * 0x2)){
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ncplane_destroy(n);
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return NULL;
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}
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if(ncplane_putstr_yx(n, l, x * len, leg[l]) != len){
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ncplane_destroy(n);
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return NULL;
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}
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}
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int t = r;
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r = g;
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g = b;
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b = t;
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}
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return n;
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}
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static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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static pthread_mutex_t render_lock = PTHREAD_MUTEX_INITIALIZER;
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struct marsh {
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struct notcurses* nc;
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struct ncvisual* ncv; // video stream, one copy per thread
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struct ncplane* slider; // text plane at top, sliding to the left
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float dm; // delay multiplier
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int next_frame;
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uint64_t startns; // when we started (CLOCK_MONOTONIC) for frame dropping
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int* frame_to_render; // shared; protected by renderlock
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int* dropped; // shared; protected by renderlock
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struct ncplane** lplane; // shared; plane to destroy, renderlocked
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};
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// make a plane on a new pile suitable for rendering a frame of the video
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static int
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make_plane(struct notcurses* nc, struct ncplane** t){
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unsigned dimy, dimx;
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notcurses_stddim_yx(nc, &dimy, &dimx);
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// FIXME want a resizecb
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struct ncplane_options opts = {
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.rows = dimy - 1,
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.cols = dimx,
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.name = "bmap",
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};
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*t = ncpile_create(nc, &opts);
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if(!*t){
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return -1;
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}
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return 0;
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}
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// returns the index of the next frame, which can immediately begin to be
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// rendered onto the thread's plane. if we're behind the clock, we don't
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// bother blitting it, and drop the plane to signal as much.
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static int
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get_next_frame(struct marsh* m, struct ncvisual_options* vopts){
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// one does the odds, and one the evens. load two unless we're the even,
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// and it's the first frame.
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if(m->next_frame){
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if(ncvisual_decode(m->ncv)){
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return -1;
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}
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}
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if(ncvisual_decode(m->ncv)){
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return -1;
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}
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uint64_t ns = clock_getns(CLOCK_MONOTONIC);
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int ret = m->next_frame;
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uint64_t deadline = m->startns + (m->next_frame + 1) * MAX_SECONDS * (NANOSECS_IN_SEC / VIDEO_FRAMES);
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// if we've missed the deadline, drop the frame 99% of the time (you've still
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// got to draw now and again, or else there's just the initial frame hanging
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// there for ~900 frames of crap).
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if(ns > deadline && (rand() % 100)){
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ncplane_destroy(vopts->n);
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vopts->n = NULL;
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}else if(ncvisual_blit(m->nc, m->ncv, vopts) == NULL){
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return -1;
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}
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m->next_frame += 2;
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return ret;
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}
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static void*
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xray_thread(void *vmarsh){
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struct marsh* m = vmarsh;
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struct ncplane* stdn = notcurses_stdplane(m->nc);
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int frame = -1;
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struct ncvisual_options vopts = {
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.x = NCALIGN_CENTER,
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.y = NCALIGN_CENTER,
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.scaling = NCSCALE_SCALE_HIRES,
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.blitter = NCBLIT_PIXEL,
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.flags = NCVISUAL_OPTION_VERALIGNED | NCVISUAL_OPTION_HORALIGNED
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| NCVISUAL_OPTION_ADDALPHA,
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};
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int ret;
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do{
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if(make_plane(m->nc, &vopts.n)){
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return NULL;
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}
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// if we're behind where we want to be time-wise, this will return the
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// expected frame id, but vopts.n will be NULL (and the plane we created
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// will have been destroyed). that frame has been dropped.
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if((frame = get_next_frame(m, &vopts)) < 0){
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ncplane_destroy(vopts.n);
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// FIXME need to cancel other one; it won't be able to progress
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return NULL;
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}
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ret = -1;
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// only one thread can render the standard pile at a time
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pthread_mutex_lock(&render_lock);
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while(*m->frame_to_render != frame){
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pthread_cond_wait(&cond, &render_lock);
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}
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int x = ncplane_x(m->slider);
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if(ncplane_move_yx(m->slider, 1, x - 1) == 0){
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// FIXME otherwise, increment a visible drop count?
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if(vopts.n){
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ncplane_reparent(vopts.n, notcurses_stdplane(m->nc));
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ncplane_move_top(vopts.n);
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ncplane_destroy(*m->lplane);
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*m->lplane = vopts.n;
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ncplane_set_fg_rgb8_clipped(stdn, 96 + *m->dropped / 2, 0, 0x80);
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ncplane_printf_aligned(stdn, 1 + ncplane_dim_y(m->slider),
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NCALIGN_RIGHT, "%d dropped frame%s",
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*m->dropped, *m->dropped == 0 ? "s 🤘" :
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*m->dropped == 1 ? " 🤔 " :
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*m->dropped < 10 ? "s 😕" :
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*m->dropped < 100 ? "s 😞" :
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*m->dropped < 250 ? "s 😟" :
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*m->dropped < 450 ? "s 😠" :
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*m->dropped < 700 ? "s 😡" : "s 🤬");
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ret = demo_render(m->nc);
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}else{
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// FIXME i'd like to at least render the updated drop count and the
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// moved slider, but even that's too slow with stupid shitty sixel,
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// due to redrawing far too much of it see #2380
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++*m->dropped;
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ret = 0;
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}
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}
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*m->frame_to_render = frame + 1;
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pthread_mutex_unlock(&render_lock);
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pthread_cond_signal(&cond);
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vopts.n = NULL;
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}while(ret == 0);
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return NULL;
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}
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int xray_demo(struct notcurses* nc, uint64_t startns){
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if(!notcurses_canopen_videos(nc)){
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return 0;
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}
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unsigned dimx, dimy;
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notcurses_term_dim_yx(nc, &dimy, &dimx);
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ncplane_erase(notcurses_stdplane(nc));
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char* path = find_data("notcursesIII.mov");
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struct ncvisual* ncv1 = ncvisual_from_file(path);
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struct ncvisual* ncv2 = ncvisual_from_file(path);
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free(path);
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if(ncv1 == NULL || ncv2 == NULL){
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return -1;
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}
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struct ncplane* slider = make_slider(nc, dimx);
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if(slider == NULL){
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ncvisual_destroy(ncv1);
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ncvisual_destroy(ncv2);
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return -1;
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}
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uint64_t stdc = 0;
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ncchannels_set_bg_rgb(&stdc, 0);
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ncplane_set_base(notcurses_stdplane(nc), "", 0, stdc);
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ncplane_set_bg_rgb(notcurses_stdplane(nc), 0);
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// returns non-zero if the selected blitter isn't available
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pthread_t tid1, tid2;
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int last_frame = 0;
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int dropped = 0;
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struct ncplane* kplane = NULL; // to kill
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struct marsh m1 = {
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.slider = slider,
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.nc = nc,
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.next_frame = 0,
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.frame_to_render = &last_frame,
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.dm = notcurses_check_pixel_support(nc) ? 0 : 0.5 * delaymultiplier,
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.ncv = ncv1,
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.startns = startns,
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.lplane = &kplane,
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.dropped = &dropped,
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};
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struct marsh m2 = {
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.slider = slider,
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.nc = nc,
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.next_frame = 1,
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.frame_to_render = &last_frame,
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.dm = notcurses_check_pixel_support(nc) ? 0 : 0.5 * delaymultiplier,
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.ncv = ncv2,
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.startns = startns,
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.lplane = &kplane,
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.dropped = &dropped,
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};
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int ret = -1;
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if(pthread_create(&tid1, NULL, xray_thread, &m1)){
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goto err;
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}
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if(pthread_create(&tid2, NULL, xray_thread, &m2)){
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pthread_join(tid1, NULL);
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goto err;
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}
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ret = pthread_join(tid1, NULL) | pthread_join(tid2, NULL);
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err:
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ncvisual_destroy(ncv1);
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ncvisual_destroy(ncv2);
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ncplane_destroy(slider);
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if(kplane){
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ncplane_destroy(kplane);
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}
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return ret;
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}
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