Mesen2/Utilities/Video/GifRecorder.cpp

#include "pch.h"
#include "GifRecorder.h"
#include "gif.h"

GifRecorder::GifRecorder()
{
	_gif.reset(new GifWriter());
	_frameCounter = 0;
}

GifRecorder::~GifRecorder()
{
	StopRecording();
}

bool GifRecorder::Init(string filename)
{
	_outputFile = filename;
	ofstream fileTest(filename, std::ios::out | std::ios::binary);
	if(!fileTest) {
		return false;
	}
	return true;
}

bool GifRecorder::StartRecording(uint32_t width, uint32_t height, uint32_t bpp, uint32_t audioSampleRate, double fps)
{
	_width = width;
	_height = height;
	_fps = fps;

	_recording = GifBegin(_gif.get(), _outputFile.c_str(), width, height, 2, 8, false);
	_frameCounter = 0;
	return _recording;
}

void GifRecorder::StopRecording()
{
	if(_recording) {
		GifEnd(_gif.get());
	}
}

bool GifRecorder::AddFrame(void* frameBuffer, uint32_t width, uint32_t height, double fps)
{
	if(_width != width || _height != height || _fps != fps) {
		return false;
	}

	_frameCounter++;
	
	if(fps < 55 || (_frameCounter % 6) != 0) {
		//At 60 FPS, skip 1 of every 6 frames (max FPS for GIFs is 50fps)
		GifWriteFrame(_gif.get(), (uint8_t*)frameBuffer, width, height, 2, 8, false);
	}

	return true;
}

bool GifRecorder::AddSound(int16_t* soundBuffer, uint32_t sampleCount, uint32_t sampleRate)
{
	return true;
}

bool GifRecorder::IsRecording()
{
	return _recording;
}

string GifRecorder::GetOutputFile()
{
	return _outputFile;
}