Ejemplo n.º 1
0
        private ResultCode DecodeInterleavedInternal(BinaryReader input, out short[] outPcmData, long outputSize, out uint outConsumed, out int outSamples)
        {
            outPcmData  = null;
            outConsumed = 0;
            outSamples  = 0;

            long streamSize = input.BaseStream.Length;

            if (streamSize < Marshal.SizeOf <OpusPacketHeader>())
            {
                return(ResultCode.OpusInvalidInput);
            }

            OpusPacketHeader header = OpusPacketHeader.FromStream(input);

            uint totalSize = header.length + (uint)Marshal.SizeOf <OpusPacketHeader>();

            if (totalSize > streamSize)
            {
                return(ResultCode.OpusInvalidInput);
            }

            byte[] opusData = input.ReadBytes((int)header.length);

            ResultCode result = GetPacketNumSamples(out int numSamples, opusData);

            if (result == ResultCode.Success)
            {
                if ((uint)numSamples * (uint)_channelsCount * sizeof(short) > outputSize)
                {
                    return(ResultCode.OpusInvalidInput);
                }

                outPcmData = new short[numSamples * _channelsCount];

                if (_reset)
                {
                    _reset = false;

                    _decoder.ResetState();
                }

                try
                {
                    outSamples  = _decoder.Decode(opusData, 0, opusData.Length, outPcmData, 0, outPcmData.Length / _channelsCount);
                    outConsumed = totalSize;
                }
                catch (OpusException)
                {
                    // TODO: as OpusException doesn't provide us the exact error code, this is kind of inaccurate in some cases...
                    return(ResultCode.OpusInvalidInput);
                }
            }

            return(ResultCode.Success);
        }
Ejemplo n.º 2
0
        public static ResultCode DecodeInterleaved(
            this IDecoder decoder,
            bool reset,
            ReadOnlySpan <byte> input,
            out short[] outPcmData,
            ulong outputSize,
            out uint outConsumed,
            out int outSamples)
        {
            outPcmData  = null;
            outConsumed = 0;
            outSamples  = 0;

            int streamSize = input.Length;

            if (streamSize < Unsafe.SizeOf <OpusPacketHeader>())
            {
                return(ResultCode.OpusInvalidInput);
            }

            OpusPacketHeader header = OpusPacketHeader.FromSpan(input);
            int  headerSize         = Unsafe.SizeOf <OpusPacketHeader>();
            uint totalSize          = header.length + (uint)headerSize;

            if (totalSize > streamSize)
            {
                return(ResultCode.OpusInvalidInput);
            }

            byte[] opusData = input.Slice(headerSize, (int)header.length).ToArray();

            ResultCode result = decoder.GetPacketNumSamples(out int numSamples, opusData);

            if (result == ResultCode.Success)
            {
                if ((uint)numSamples * (uint)decoder.ChannelsCount * sizeof(short) > outputSize)
                {
                    return(ResultCode.OpusInvalidInput);
                }

                outPcmData = new short[numSamples * decoder.ChannelsCount];

                if (reset)
                {
                    decoder.ResetState();
                }

                try
                {
                    outSamples  = decoder.Decode(opusData, 0, opusData.Length, outPcmData, 0, outPcmData.Length / decoder.ChannelsCount);
                    outConsumed = totalSize;
                }
                catch (OpusException)
                {
                    // TODO: as OpusException doesn't provide us the exact error code, this is kind of inaccurate in some cases...
                    return(ResultCode.OpusInvalidInput);
                }
            }

            return(ResultCode.Success);
        }