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/*
* Copyright © 2020, VideoLAN and dav1d authors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "dp_renderer.h"
#include <assert.h>
/**
* Renderer context for SDL
*/
typedef struct renderer_priv_ctx
{
// SDL window
SDL_Window *win;
// SDL renderer
SDL_Renderer *renderer;
// Lock protecting access to the texture
SDL_mutex *lock;
// Texture to render
SDL_Texture *tex;
} Dav1dPlayRendererPrivateContext;
static void *sdl_renderer_create(void)
{
SDL_Window *win = dp_create_sdl_window(0);
if (win == NULL)
return NULL;
// Alloc
Dav1dPlayRendererPrivateContext *rd_priv_ctx = malloc(sizeof(Dav1dPlayRendererPrivateContext));
if (rd_priv_ctx == NULL) {
return NULL;
}
rd_priv_ctx->win = win;
// Create renderer
rd_priv_ctx->renderer = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);
// Set scale quality
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
// Create Mutex
rd_priv_ctx->lock = SDL_CreateMutex();
if (rd_priv_ctx->lock == NULL) {
fprintf(stderr, "SDL_CreateMutex failed: %s\n", SDL_GetError());
free(rd_priv_ctx);
return NULL;
}
rd_priv_ctx->tex = NULL;
return rd_priv_ctx;
}
static void sdl_renderer_destroy(void *cookie)
{
Dav1dPlayRendererPrivateContext *rd_priv_ctx = cookie;
assert(rd_priv_ctx != NULL);
SDL_DestroyRenderer(rd_priv_ctx->renderer);
SDL_DestroyMutex(rd_priv_ctx->lock);
free(rd_priv_ctx);
}
static void sdl_render(void *cookie, const Dav1dPlaySettings *settings)
{
Dav1dPlayRendererPrivateContext *rd_priv_ctx = cookie;
assert(rd_priv_ctx != NULL);
SDL_LockMutex(rd_priv_ctx->lock);
if (rd_priv_ctx->tex == NULL) {
SDL_UnlockMutex(rd_priv_ctx->lock);
return;
}
// Display the frame
SDL_RenderClear(rd_priv_ctx->renderer);
SDL_RenderCopy(rd_priv_ctx->renderer, rd_priv_ctx->tex, NULL, NULL);
SDL_RenderPresent(rd_priv_ctx->renderer);
SDL_UnlockMutex(rd_priv_ctx->lock);
}
static int sdl_update_texture(void *cookie, Dav1dPicture *dav1d_pic,
const Dav1dPlaySettings *settings)
{
Dav1dPlayRendererPrivateContext *rd_priv_ctx = cookie;
assert(rd_priv_ctx != NULL);
SDL_LockMutex(rd_priv_ctx->lock);
if (dav1d_pic == NULL) {
rd_priv_ctx->tex = NULL;
SDL_UnlockMutex(rd_priv_ctx->lock);
return 0;
}
int width = dav1d_pic->p.w;
int height = dav1d_pic->p.h;
int tex_w = width;
int tex_h = height;
enum Dav1dPixelLayout dav1d_layout = dav1d_pic->p.layout;
if (DAV1D_PIXEL_LAYOUT_I420 != dav1d_layout || dav1d_pic->p.bpc != 8) {
fprintf(stderr, "Unsupported pixel format, only 8bit 420 supported so far.\n");
exit(50);
}
SDL_Texture *texture = rd_priv_ctx->tex;
if (texture != NULL) {
SDL_QueryTexture(texture, NULL, NULL, &tex_w, &tex_h);
if (tex_w != width || tex_h != height) {
SDL_DestroyTexture(texture);
texture = NULL;
}
}
if (texture == NULL) {
texture = SDL_CreateTexture(rd_priv_ctx->renderer, SDL_PIXELFORMAT_IYUV,
SDL_TEXTUREACCESS_STREAMING, width, height);
}
SDL_UpdateYUVTexture(texture, NULL,
dav1d_pic->data[0], (int)dav1d_pic->stride[0], // Y
dav1d_pic->data[1], (int)dav1d_pic->stride[1], // U
dav1d_pic->data[2], (int)dav1d_pic->stride[1] // V
);
rd_priv_ctx->tex = texture;
SDL_UnlockMutex(rd_priv_ctx->lock);
return 0;
}
const Dav1dPlayRenderInfo rdr_sdl = {
.name = "sdl",
.create_renderer = sdl_renderer_create,
.destroy_renderer = sdl_renderer_destroy,
.render = sdl_render,
.update_frame = sdl_update_texture
};
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