#include "Resampler.h"
#include "ffcpp.h"
#include <stdexcept>

extern "C" {
	#include <libavutil/opt.h>
}

namespace ffcpp {

	Resampler::Resampler(int inChannelLayout, int inSampleRate, AVSampleFormat inSampleFormat, int outChannelLayout,
	                     int outSampleRate, AVSampleFormat outSampleFormat) {
		_swrContext = swr_alloc();
		if(!_swrContext) {
			throw new std::runtime_error("cannot create resampler");
		}

		av_opt_set_int(_swrContext, "in_channel_layout",    inChannelLayout, 0);
		av_opt_set_int(_swrContext, "in_sample_rate",       inSampleRate, 0);
		av_opt_set_sample_fmt(_swrContext, "in_sample_fmt", inSampleFormat, 0);

		av_opt_set_int(_swrContext, "out_channel_layout",    outChannelLayout, 0);
		av_opt_set_int(_swrContext, "out_sample_rate",       outSampleRate, 0);
		av_opt_set_sample_fmt(_swrContext, "out_sample_fmt", outSampleFormat, 0);

		int res = swr_init(_swrContext);
		throwIfError(res, "cannot init resampler");
	}

	Resampler::~Resampler() {
		if(_swrContext) {
			swr_free(&_swrContext);
		}
	}

	Frame Resampler::Resample(Frame& inFrame) {
		return Frame();
	}
}