mirror of
https://github.com/ryujinx-mirror/ryujinx.git
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92 lines
2.9 KiB
C#
92 lines
2.9 KiB
C#
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using Concentus;
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using Concentus.Enums;
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using Concentus.Structs;
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using Ryujinx.HLE.HOS.Services.Audio.Types;
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using System;
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using System.Runtime.CompilerServices;
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namespace Ryujinx.HLE.HOS.Services.Audio.HardwareOpusDecoderManager
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{
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static class DecoderCommon
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{
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private static ResultCode GetPacketNumSamples(this IDecoder decoder, out int numSamples, byte[] packet)
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{
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int result = OpusPacketInfo.GetNumSamples(packet, 0, packet.Length, decoder.SampleRate);
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numSamples = result;
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if (result == OpusError.OPUS_INVALID_PACKET)
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{
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return ResultCode.OpusInvalidInput;
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}
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else if (result == OpusError.OPUS_BAD_ARG)
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{
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return ResultCode.OpusInvalidInput;
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}
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return ResultCode.Success;
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}
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public static ResultCode DecodeInterleaved(
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this IDecoder decoder,
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bool reset,
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ReadOnlySpan<byte> input,
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out short[] outPcmData,
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ulong outputSize,
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out uint outConsumed,
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out int outSamples)
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{
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outPcmData = null;
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outConsumed = 0;
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outSamples = 0;
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int streamSize = input.Length;
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if (streamSize < Unsafe.SizeOf<OpusPacketHeader>())
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{
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return ResultCode.OpusInvalidInput;
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}
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OpusPacketHeader header = OpusPacketHeader.FromSpan(input);
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int headerSize = Unsafe.SizeOf<OpusPacketHeader>();
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uint totalSize = header.length + (uint)headerSize;
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if (totalSize > streamSize)
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{
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return ResultCode.OpusInvalidInput;
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}
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byte[] opusData = input.Slice(headerSize, (int)header.length).ToArray();
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ResultCode result = decoder.GetPacketNumSamples(out int numSamples, opusData);
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if (result == ResultCode.Success)
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{
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if ((uint)numSamples * (uint)decoder.ChannelsCount * sizeof(short) > outputSize)
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{
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return ResultCode.OpusInvalidInput;
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}
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outPcmData = new short[numSamples * decoder.ChannelsCount];
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if (reset)
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{
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decoder.ResetState();
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}
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try
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{
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outSamples = decoder.Decode(opusData, 0, opusData.Length, outPcmData, 0, outPcmData.Length / decoder.ChannelsCount);
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outConsumed = totalSize;
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}
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catch (OpusException)
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{
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// TODO: as OpusException doesn't provide us the exact error code, this is kind of inaccurate in some cases...
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return ResultCode.OpusInvalidInput;
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}
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}
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return ResultCode.Success;
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}
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}
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}
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