initial checkin

Check in contents of upstream 1.4.2 tarball, exclude generated files.

1 files changed, 183 insertions, 0 deletions

diff --git a/src/audio/audio_encoder.h b/src/audio/audio_encoder.h
new file mode 100644
index 0000000..d280567
--- /dev/null
+++ b/src/audio/audio_encoder.h
@@ -0,0 +1,183 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+// Audio encoders
+
+#ifndef _AUDIO_ENCODER_H
+#define _AUDIO_ENCODER_H
+
+#include <cc++/config.h>
+#include "twinkle_config.h"
+#include "audio_codecs.h"
+#include "user.h"
+
+#ifdef HAVE_GSM
+#include <gsm/gsm.h>
+#else
+#include "gsm/inc/gsm.h"
+#endif
+
+#ifdef HAVE_SPEEX
+#include <speex/speex.h>
+#endif
+
+#ifdef HAVE_ILBC
+#ifndef HAVE_ILBC_CPP
+extern "C" {
+#endif
+#include <ilbc/iLBC_define.h>
+#ifndef HAVE_ILBC_CPP
+}
+#endif
+#endif
+
+// Abstract definition of an audio encoder
+class t_audio_encoder {
+protected:
+	t_audio_codec	_codec;
+	uint16		_payload_id;		// payload id for the codec
+	uint16		_ptime;			// in milliseconds
+	uint16		_max_payload_size;	// maximum size of payload
+	
+	t_user		*_user_config;
+	
+	t_audio_encoder(uint16 payload_id, uint16 ptime, t_user *user_config);
+	
+public:
+	virtual ~t_audio_encoder() {};
+	
+	t_audio_codec get_codec(void) const;
+	uint16 get_payload_id(void) const;
+	uint16 get_ptime(void) const;
+	uint16 get_sample_rate(void) const;
+	uint16 get_max_payload_size(void) const;
+	
+	// Encode a 16-bit PCM sample buffer to a encoded payload
+	// Returns the number of bytes written into the payload.
+	// The silence flag indicates if the returned sound samples represent silence
+	// that may be suppressed.
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence) = 0;
+};
+
+
+// G.711 A-law
+class t_g711a_audio_encoder : public t_audio_encoder {
+public:
+	t_g711a_audio_encoder(uint16 payload_id, uint16 ptime, t_user *user_config);
+	
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence);
+};
+
+
+// G.711 u-law
+class t_g711u_audio_encoder : public t_audio_encoder {
+public:
+	t_g711u_audio_encoder(uint16 payload_id, uint16 ptime, t_user *user_config);
+	
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence);
+};
+
+
+// GSM
+class t_gsm_audio_encoder : public t_audio_encoder {
+private:
+	gsm 		gsm_encoder;
+	
+public:
+	t_gsm_audio_encoder(uint16 payload_id, uint16 ptime, t_user *user_config);
+	virtual ~t_gsm_audio_encoder();
+	
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence);
+};
+
+
+#ifdef HAVE_SPEEX
+class t_speex_audio_encoder : public t_audio_encoder {
+public:
+	enum t_mode {
+		MODE_NB,	// Narrow band
+		MODE_WB,	// Wide band
+		MODE_UWB	// Ultra wide band
+	};
+	
+private:
+	SpeexBits	speex_bits;
+	void		*speex_enc_state;
+	t_mode		_mode;
+	
+public:
+	t_speex_audio_encoder(uint16 payload_id, uint16 ptime, t_mode mode, 
+		t_user *user_config);
+	virtual ~t_speex_audio_encoder();
+	
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence);
+};
+#endif
+
+#ifdef HAVE_ILBC
+class t_ilbc_audio_encoder : public t_audio_encoder {
+private:
+	iLBC_Enc_Inst_t	_ilbc_encoder;
+	uint8		_mode;		// 20, 30 ms (frame size)
+	
+public:
+	t_ilbc_audio_encoder(uint16 payload_id, uint16 ptime, 
+		t_user *user_config);
+	
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence);
+};
+#endif
+
+class t_g726_audio_encoder : public t_audio_encoder {
+public:
+	enum t_bit_rate {
+		BIT_RATE_16,
+		BIT_RATE_24,
+		BIT_RATE_32,
+		BIT_RATE_40
+	};
+	
+private:
+	uint16 encode_16(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size);
+	uint16 encode_24(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size);
+	uint16 encode_32(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size);
+	uint16 encode_40(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size);
+
+	g72x_state	_state;
+	t_bit_rate	_bit_rate;
+	t_g726_packing	_packing;
+	
+public:
+	t_g726_audio_encoder(uint16 payload_id, uint16 ptime, t_bit_rate bit_rate, 
+		t_user *user_config);
+		
+	virtual uint16 encode(int16 *sample_buf, uint16 nsamples, 
+			uint8 *payload, uint16 payload_size, bool &silence);
+};
+
+#endif