Пример #1
0
        /// <summary>
        /// Reads bytes from this wave stream
        /// </summary>
        /// <param name="destBuffer">The destination buffer</param>
        /// <returns>Number of bytes read.</returns>
        public int Read(Span <byte> destBuffer)
        {
            int samplesRequired = destBuffer.Length / 2;

            sourceBuffer = BufferHelpers.Ensure(sourceBuffer, samplesRequired);
            var s             = new Span <float>(sourceBuffer, 0, samplesRequired);
            int sourceSamples = sourceProvider.Read(s);

            var outBuf = MemoryMarshal.Cast <byte, short>(destBuffer);

            //destBuffer.NonPortableCast<byte,short>();
            for (int sample = 0; sample < sourceSamples; sample++)
            {
                // adjust volume
                float sample32 = sourceBuffer[sample] * volume;
                // clip
                if (sample32 > 1.0f)
                {
                    sample32 = 1.0f;
                }
                if (sample32 < -1.0f)
                {
                    sample32 = -1.0f;
                }
                outBuf[sample++] = (short)(sample32 * 32767);
            }

            return(sourceSamples * 2);
        }
Пример #2
0
 /// <summary>
 /// Ensure the source buffer exists and is big enough
 /// </summary>
 /// <param name="sourceBytesRequired">Bytes required</param>
 protected void EnsureSourceBuffer(int sourceBytesRequired)
 {
     sourceBuffer = BufferHelpers.Ensure(sourceBuffer, sourceBytesRequired);
 }