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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2022, Ideas on Board Oy
*
* sdl_sink.h - SDL Sink
*/
#include "sdl_sink.h"
#include <assert.h>
#include <fcntl.h>
#include <iomanip>
#include <iostream>
#include <signal.h>
#include <sstream>
#include <string.h>
#include <unistd.h>
#include <libcamera/camera.h>
#include <libcamera/formats.h>
#include "event_loop.h"
#include "image.h"
#ifdef HAVE_SDL_IMAGE
#include "sdl_texture_mjpg.h"
#endif
#include "sdl_texture_yuyv.h"
using namespace libcamera;
using namespace std::chrono_literals;
SDLSink::SDLSink()
: window_(nullptr), renderer_(nullptr), rect_({}),
init_(false)
{
}
SDLSink::~SDLSink()
{
stop();
}
int SDLSink::configure(const libcamera::CameraConfiguration &config)
{
int ret = FrameSink::configure(config);
if (ret < 0)
return ret;
if (config.size() > 1) {
std::cerr
<< "SDL sink only supports one camera stream at present, streaming first camera stream"
<< std::endl;
} else if (config.empty()) {
std::cerr << "Require at least one camera stream to process"
<< std::endl;
return -EINVAL;
}
const libcamera::StreamConfiguration &cfg = config.at(0);
rect_.w = cfg.size.width;
rect_.h = cfg.size.height;
switch (cfg.pixelFormat) {
#ifdef HAVE_SDL_IMAGE
case libcamera::formats::MJPEG:
texture_ = std::make_unique<SDLTextureMJPG>(rect_);
break;
#endif
case libcamera::formats::YUYV:
texture_ = std::make_unique<SDLTextureYUYV>(rect_);
break;
default:
std::cerr << "Unsupported pixel format "
<< cfg.pixelFormat.toString() << std::endl;
return -EINVAL;
};
return 0;
}
int SDLSink::start()
{
int ret = SDL_Init(SDL_INIT_VIDEO);
if (ret) {
std::cerr << "Failed to initialize SDL: " << SDL_GetError()
<< std::endl;
return ret;
}
init_ = true;
window_ = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, rect_.w,
rect_.h,
SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
if (!window_) {
std::cerr << "Failed to create SDL window: " << SDL_GetError()
<< std::endl;
return -EINVAL;
}
renderer_ = SDL_CreateRenderer(window_, -1, 0);
if (!renderer_) {
std::cerr << "Failed to create SDL renderer: " << SDL_GetError()
<< std::endl;
return -EINVAL;
}
/*
* Set for scaling purposes, not critical, don't return in case of
* error.
*/
ret = SDL_RenderSetLogicalSize(renderer_, rect_.w, rect_.h);
if (ret)
std::cerr << "Failed to set SDL render logical size: "
<< SDL_GetError() << std::endl;
ret = texture_->create(renderer_);
if (ret) {
return ret;
}
/* \todo Make the event cancellable to support stop/start cycles. */
EventLoop::instance()->addTimerEvent(
10ms, std::bind(&SDLSink::processSDLEvents, this));
return 0;
}
int SDLSink::stop()
{
texture_.reset();
if (renderer_) {
SDL_DestroyRenderer(renderer_);
renderer_ = nullptr;
}
if (window_) {
SDL_DestroyWindow(window_);
window_ = nullptr;
}
if (init_) {
SDL_Quit();
init_ = false;
}
return FrameSink::stop();
}
void SDLSink::mapBuffer(FrameBuffer *buffer)
{
std::unique_ptr<Image> image =
Image::fromFrameBuffer(buffer, Image::MapMode::ReadOnly);
assert(image != nullptr);
mappedBuffers_[buffer] = std::move(image);
}
bool SDLSink::processRequest(Request *request)
{
for (auto [stream, buffer] : request->buffers()) {
renderBuffer(buffer);
break; /* to be expanded to launch SDL window per buffer */
}
return true;
}
/*
* Process SDL events, required for things like window resize and quit button
*/
void SDLSink::processSDLEvents()
{
for (SDL_Event e; SDL_PollEvent(&e);) {
if (e.type == SDL_QUIT) {
/* Click close icon then quit */
EventLoop::instance()->exit(0);
}
}
}
void SDLSink::renderBuffer(FrameBuffer *buffer)
{
Image *image = mappedBuffers_[buffer].get();
/* \todo Implement support for multi-planar formats. */
const FrameMetadata::Plane &meta = buffer->metadata().planes()[0];
Span<uint8_t> data = image->data(0);
if (meta.bytesused > data.size())
std::cerr << "payload size " << meta.bytesused
<< " larger than plane size " << data.size()
<< std::endl;
texture_->update(data);
SDL_RenderClear(renderer_);
SDL_RenderCopy(renderer_, texture_->get(), nullptr, nullptr);
SDL_RenderPresent(renderer_);
}
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