#include "Sound/OggLoader.h"

#include "fmt/format.h"

#include "External/stb/stb_vorbis.c"

#include <cstring>

#include <cstdlib>

#include <stdexcept>

namespace sh::sound

{

SH_SOUND_API auto OggLoader::Load(const std::filesystem::path& path) -> AudioData

{

int channels = 0;

int sampleRate = 0;

short* decodedSamples = nullptr;

const int sampleCount = stb_vorbis_decode_filename(path.string().c_str(), &channels, &sampleRate, &decodedSamples);

if (sampleCount < 0 || decodedSamples == nullptr)

throw std::runtime_error{ fmt::format("Failed to decode ogg file: {}", path.string()) };

AudioData audioData{};

audioData.sampleRate = static_cast<std::uint32_t>(sampleRate);

if (channels == 1)

audioData.format = AudioFormat::Mono16;

else if (channels == 2)

audioData.format = AudioFormat::Stereo16;

else

{

free(decodedSamples);

throw std::runtime_error{ fmt::format("Unsupported ogg channel count: {}", channels) };

}

const std::size_t byteCount = static_cast<std::size_t>(sampleCount) * static_cast<std::size_t>(channels) * sizeof(short);

audioData.samples.resize(byteCount);

std::memcpy(audioData.samples.data(), decodedSamples, byteCount);

free(decodedSamples);

return audioData;

}

}//namespace