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/**
* @file sdl2/sdl.c Simple DirectMedia Layer module for SDL v2.0
*
* Copyright (C) 2010 Creytiv.com
*/
#include <SDL2/SDL.h>
#include <re.h>
#include <rem.h>
#include <baresip.h>
struct vidisp_st {
struct vidisp *vd; /**< Inheritance (1st) */
SDL_Window *window; /**< SDL Window */
SDL_Renderer *renderer; /**< SDL Renderer */
SDL_Texture *texture; /**< Texture for pixels */
struct vidsz size; /**< Current size */
bool fullscreen; /**< Fullscreen flag */
};
static struct vidisp *vid;
static void sdl_reset(struct vidisp_st *st)
{
if (st->texture) {
/*SDL_DestroyTexture(st->texture);*/
st->texture = NULL;
}
if (st->renderer) {
/*SDL_DestroyRenderer(st->renderer);*/
st->renderer = NULL;
}
if (st->window) {
SDL_DestroyWindow(st->window);
st->window = NULL;
}
}
static void destructor(void *arg)
{
struct vidisp_st *st = arg;
sdl_reset(st);
mem_deref(st->vd);
}
static int alloc(struct vidisp_st **stp, struct vidisp *vd,
struct vidisp_prm *prm, const char *dev,
vidisp_resize_h *resizeh, void *arg)
{
struct vidisp_st *st;
int err = 0;
/* Not used by SDL */
(void)prm;
(void)dev;
(void)resizeh;
(void)arg;
st = mem_zalloc(sizeof(*st), destructor);
if (!st)
return ENOMEM;
st->vd = mem_ref(vd);
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
static int display(struct vidisp_st *st, const char *title,
const struct vidframe *frame)
{
void *pixels;
uint8_t *p;
int pitch, ret;
unsigned i, h;
if (!vidsz_cmp(&st->size, &frame->size)) {
if (st->size.w && st->size.h) {
info("sdl: reset size: %u x %u ---> %u x %u\n",
st->size.w, st->size.h,
frame->size.w, frame->size.h);
}
sdl_reset(st);
}
if (!st->window) {
Uint32 flags = SDL_WINDOW_SHOWN | SDL_WINDOW_INPUT_FOCUS;
char capt[256];
if (st->fullscreen)
flags |= SDL_WINDOW_FULLSCREEN;
if (title) {
re_snprintf(capt, sizeof(capt), "%s - %u x %u",
title, frame->size.w, frame->size.h);
}
else {
re_snprintf(capt, sizeof(capt), "%u x %u",
frame->size.w, frame->size.h);
}
st->window = SDL_CreateWindow(capt,
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
frame->size.w, frame->size.h,
flags);
if (!st->window) {
warning("sdl: unable to create sdl window: %s\n",
SDL_GetError());
return ENODEV;
}
st->size = frame->size;
SDL_RaiseWindow(st->window);
SDL_SetWindowBordered(st->window, true);
SDL_ShowWindow(st->window);
}
if (!st->renderer) {
Uint32 flags = 0;
flags |= SDL_RENDERER_ACCELERATED;
flags |= SDL_RENDERER_PRESENTVSYNC;
st->renderer = SDL_CreateRenderer(st->window, -1, flags);
if (!st->renderer) {
warning("sdl: unable to create renderer: %s\n",
SDL_GetError());
return ENOMEM;
}
}
if (!st->texture) {
st->texture = SDL_CreateTexture(st->renderer,
SDL_PIXELFORMAT_IYUV,
SDL_TEXTUREACCESS_STREAMING,
frame->size.w, frame->size.h);
if (!st->texture) {
warning("sdl: unable to create texture: %s\n",
SDL_GetError());
return ENODEV;
}
}
ret = SDL_LockTexture(st->texture, NULL, &pixels, &pitch);
if (ret != 0) {
warning("sdl: unable to lock texture (ret=%d)\n", ret);
return ENODEV;
}
p = pixels;
for (i=0; i<3; i++) {
const uint8_t *s = frame->data[i];
const unsigned stp = frame->linesize[0] / frame->linesize[i];
const unsigned sz = frame->size.w / stp;
for (h = 0; h < frame->size.h; h += stp) {
memcpy(p, s, sz);
s += frame->linesize[i];
p += (pitch / stp);
}
}
SDL_UnlockTexture(st->texture);
/* Blit the sprite onto the screen */
SDL_RenderCopy(st->renderer, st->texture, NULL, NULL);
/* Update the screen! */
SDL_RenderPresent(st->renderer);
return 0;
}
static void hide(struct vidisp_st *st)
{
if (!st || !st->window)
return;
SDL_HideWindow(st->window);
}
static int module_init(void)
{
int err;
if (SDL_VideoInit(NULL) < 0) {
warning("sdl2: unable to init Video: %s\n",
SDL_GetError());
return ENODEV;
}
err = vidisp_register(&vid, "sdl2", alloc, NULL, display, hide);
if (err)
return err;
return 0;
}
static int module_close(void)
{
vid = mem_deref(vid);
SDL_VideoQuit();
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(sdl2) = {
"sdl2",
"vidisp",
module_init,
module_close,
};
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