From 3bf9df6b2785fa6d951086978a3e66f49427166a Mon Sep 17 00:00:00 2001
From: FluorescentCIAAfricanAmerican <0934gj3049fk@protonmail.com>
Date: Wed, 22 Apr 2020 12:56:21 -0400
Subject: 1

---
 engine/voice_codecs/speex/VoiceEncoder_Speex.cpp | 202 +++++++++++++++++++++++
 1 file changed, 202 insertions(+)
 create mode 100644 engine/voice_codecs/speex/VoiceEncoder_Speex.cpp

(limited to 'engine/voice_codecs/speex/VoiceEncoder_Speex.cpp')

diff --git a/engine/voice_codecs/speex/VoiceEncoder_Speex.cpp b/engine/voice_codecs/speex/VoiceEncoder_Speex.cpp
new file mode 100644
index 0000000..8751618
--- /dev/null
+++ b/engine/voice_codecs/speex/VoiceEncoder_Speex.cpp
@@ -0,0 +1,202 @@
+//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+/* This product contains Speex software.  The license terms of the Speex
+software, distributed with this product, are as follows:
+
+© 2002-2003, Jean-Marc Valin/Xiph.Org Foundation
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or
+other materials provided with the distribution.
+
+Neither the name of the Xiph.org Foundation nor the names of its
+contributors may be used to endorse or promote products derived from this
+software without specific prior written permission.
+
+This software is provided by the copyright holders and contributors "as is"
+and any express or implied warranties, including, but not limited to, the
+implied warranties of merchantability and fitness for a particular purpose
+are disclaimed. In no event shall the foundation or contributors be liable
+for any direct, indirect, incidental, special, exemplary, or consequential
+damages (including, but not limited to, procurement of substitute goods or
+services; loss of use, data, or profits; or business interruption) however
+caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence or otherwise) arising in any way
+out of the use of this software, even if advised of the possibility of such
+damage. */
+
+#include "ivoicecodec.h"
+#include "VoiceEncoder_Speex.h"
+#include <stdio.h>
+
+#define SAMPLERATE			8000	// get 8000 samples/sec
+#define RAW_FRAME_SIZE		160		// in 160 samples per frame
+
+// each quality has a differnt farme size
+const int ENCODED_FRAME_SIZE [11] = {6,6,15,15,20,20,28,28,38,38,38};	
+
+/* useful Speex voice qualities are 0,2,4,6 and 8. each quality level
+   has a diffrent encoded frame size and needed bitrate:
+
+	Quality 0 :  6 bytes/frame,  2400bps
+	Quality 2 : 15 bytes/frame,  6000bps
+	Quality 4 : 20 bytes/frame,  8000bps
+	Quality 6 : 28 bytes/frame, 11200bps
+	Quality 8 : 38 bytes/frame, 15200bps */
+
+
+extern IVoiceCodec* CreateVoiceCodec_Frame(IFrameEncoder *pEncoder);
+
+void* CreateSpeexVoiceCodec()
+{
+	IFrameEncoder *pEncoder = new VoiceEncoder_Speex;
+	return CreateVoiceCodec_Frame( pEncoder );
+}
+
+EXPOSE_INTERFACE_FN(CreateSpeexVoiceCodec, IVoiceCodec, "vaudio_speex")
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+VoiceEncoder_Speex::VoiceEncoder_Speex()
+{
+	m_EncoderState = NULL;
+	m_DecoderState = NULL;
+	m_Quality = 0;
+}
+
+VoiceEncoder_Speex::~VoiceEncoder_Speex()
+{
+	TermStates();
+}
+
+bool VoiceEncoder_Speex::Init(int quality, int &rawFrameSize, int &encodedFrameSize)
+{
+	if ( !InitStates() )
+		return false;
+
+	rawFrameSize = RAW_FRAME_SIZE * BYTES_PER_SAMPLE;
+
+	// map gerneral voice quality 1-5 to speex quality levels
+	switch ( quality )
+	{
+		case 1 :	m_Quality = 0; break;
+		case 2 :	m_Quality = 2; break;
+		case 3 :	m_Quality = 4; break;
+		case 4 :	m_Quality = 6; break;
+		case 5 : 	m_Quality = 8; break;
+		default	:	m_Quality = 0; break;
+	}
+
+	encodedFrameSize = ENCODED_FRAME_SIZE[m_Quality];
+
+	speex_encoder_ctl( m_EncoderState, SPEEX_SET_QUALITY, &m_Quality);
+	speex_decoder_ctl( m_DecoderState, SPEEX_SET_QUALITY, &m_Quality);
+
+	int postfilter = 1; // Set the perceptual enhancement on
+	speex_decoder_ctl( m_DecoderState, SPEEX_SET_ENH, &postfilter);
+
+	int samplerate = SAMPLERATE;
+	speex_decoder_ctl( m_DecoderState, SPEEX_SET_SAMPLING_RATE, &samplerate );
+	speex_encoder_ctl( m_EncoderState, SPEEX_SET_SAMPLING_RATE, &samplerate );
+
+	return true;
+}
+
+void VoiceEncoder_Speex::Release()
+{
+	delete this;
+}
+
+void VoiceEncoder_Speex::EncodeFrame(const char *pUncompressedBytes, char *pCompressed)
+{
+	float input[RAW_FRAME_SIZE];
+	short * in = (short*)pUncompressedBytes;
+
+	/*Copy the 16 bits values to float so Speex can work on them*/
+	for (int i=0;i<RAW_FRAME_SIZE;i++)
+	{
+		input[i]=(float)*in;
+		in++;
+	}
+
+	/*Flush all the bits in the struct so we can encode a new frame*/
+	speex_bits_reset( &m_Bits );
+
+	/*Encode the frame*/
+	speex_encode( m_EncoderState, input, &m_Bits );
+
+	/*Copy the bits to an array of char that can be written*/
+	int size = speex_bits_write(&m_Bits, pCompressed, ENCODED_FRAME_SIZE[m_Quality] );
+	NOTE_UNUSED( size );
+
+	// char text[255];	_snprintf(text, 255, "outsize %i,", size ); OutputDebugStr( text );
+}
+
+void VoiceEncoder_Speex::DecodeFrame(const char *pCompressed, char *pDecompressedBytes)
+{
+	float output[RAW_FRAME_SIZE];
+	short * out = (short*)pDecompressedBytes;
+
+	/*Copy the data into the bit-stream struct*/
+	speex_bits_read_from(&m_Bits, (char *)pCompressed, ENCODED_FRAME_SIZE[m_Quality] );
+
+	/*Decode the data*/
+	speex_decode(m_DecoderState, &m_Bits, output);
+	
+	/*Copy from float to short (16 bits) for output*/
+	for (int i=0;i<RAW_FRAME_SIZE;i++)
+	{
+		*out = (short)output[i];
+		out++;
+	}
+}
+
+bool VoiceEncoder_Speex::ResetState()
+{
+	speex_encoder_ctl(m_EncoderState, SPEEX_RESET_STATE , NULL );
+	speex_decoder_ctl(m_DecoderState, SPEEX_RESET_STATE , NULL );
+	return true;
+}
+
+bool VoiceEncoder_Speex::InitStates()
+{
+	speex_bits_init(&m_Bits);
+	
+	m_EncoderState = speex_encoder_init( &speex_nb_mode );	// narrow band mode 8kbp
+
+	m_DecoderState = speex_decoder_init( &speex_nb_mode );
+	
+	return m_EncoderState && m_DecoderState;
+}
+
+void VoiceEncoder_Speex::TermStates()
+{
+	if(m_EncoderState)
+	{
+		speex_encoder_destroy( m_EncoderState );
+		m_EncoderState = NULL;
+	}
+
+	if(m_DecoderState)
+	{
+		speex_decoder_destroy( m_DecoderState );
+		m_DecoderState = NULL;
+	}
+
+	speex_bits_destroy( &m_Bits );
+}
-- 
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