initial checkin

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

1 files changed, 126 insertions, 0 deletions

diff --git a/src/audio/audio_device.h b/src/audio/audio_device.h
new file mode 100644
index 0000000..27503f8
--- /dev/null
+++ b/src/audio/audio_device.h
@@ -0,0 +1,126 @@
+/*
+    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
+*/
+
+#ifndef _AUDIO_DEVICE_H
+#define _AUDIO_DEVICE_H
+
+#include <string>
+#include "twinkle_config.h"
+
+using namespace std;
+
+#ifndef _SYS_SETTINGS_H
+class t_audio_device;
+#endif
+
+enum t_audio_sampleformat {
+	SAMPLEFORMAT_U8,
+	SAMPLEFORMAT_S8,
+	SAMPLEFORMAT_S16,
+	SAMPLEFORMAT_U16
+};
+
+class t_audio_io {
+public:
+	virtual ~t_audio_io();
+	virtual void enable(bool enable_playback, bool enable_recording) = 0;
+	virtual void flush(bool playback_buffer, bool recording_buffer) = 0;
+	// Returns the number of bytes that can be written/read without blocking
+	virtual int get_buffer_space(bool is_recording_buffer) = 0;
+	// Returns the size of the hardware buffer
+	virtual int get_buffer_size(bool is_recording_buffer) = 0;
+	
+	/** Check if a play buffer underrun occurred. */
+	virtual bool play_buffer_underrun(void) = 0;
+	
+	virtual int read(unsigned char* buf, int len) = 0;
+	virtual int write(const unsigned char* buf, int len) = 0;
+	virtual int get_sample_rate(void) const;
+	
+	static t_audio_io* open(const t_audio_device& dev, bool playback, 
+		bool capture, bool blocking, int channels, t_audio_sampleformat format, 
+		int sample_rate, bool short_latency);
+		
+	// Validate if an audio device can be opened.
+	static bool validate(const t_audio_device& dev, bool playback, bool capture);
+
+protected:
+	virtual bool open(const string& device, bool playback, bool capture, 
+		bool blocking, int channels, t_audio_sampleformat format, 
+		int sample_rate, bool short_latency);
+		
+private:
+	int _sample_rate;
+	
+};
+
+class t_oss_io : public t_audio_io {
+public:
+	t_oss_io();
+	virtual ~t_oss_io();
+	void enable(bool enable_playback, bool enable_recording);
+	void flush(bool playback_buffer, bool recording_buffer);
+	int get_buffer_space(bool is_recording_buffer);
+	int get_buffer_size(bool is_recording_buffer);
+	bool play_buffer_underrun(void);
+	int read(unsigned char* buf, int len);
+	int write(const unsigned char* buf, int len);
+protected:
+	bool open(const string& device, bool playback, bool capture, bool blocking, 
+		int channels, t_audio_sampleformat format, int sample_rate, 
+		bool short_latency);
+private:
+	int fd;
+	int play_buffersize, rec_buffersize;
+};
+
+#ifdef HAVE_LIBASOUND
+class t_alsa_io : public t_audio_io {
+public:
+	t_alsa_io();
+	virtual ~t_alsa_io();
+	void enable(bool enable_playback, bool enable_recording);
+	void flush(bool playback_buffer, bool recording_buffer);
+	int get_buffer_space(bool is_recording_buffer);
+	int get_buffer_size(bool is_recording_buffer);
+	bool play_buffer_underrun(void);
+	int read(unsigned char* buf, int len);
+	int write(const unsigned char* buf, int len);
+protected:
+	bool open(const string& device, bool playback, bool capture, bool blocking, 
+		int channels, t_audio_sampleformat format, int sample_rate, 
+		bool short_latency);
+private:
+	struct _snd_pcm *pcm_play_ptr, *pcm_rec_ptr;
+	int play_framesize, rec_framesize;
+	int play_buffersize, rec_buffersize;
+	int play_periods, rec_periods;
+	bool short_latency;
+	
+	// snd_pcm_delay should return the number of bytes in the buffer.
+	// For some reason however, if the capture device is a software mixer,
+	// it returns inaccurate values.
+	// This flag if the functionality is broken.
+	bool rec_delay_broken;
+	
+	// Indicates if snd_pcm_pause works for this device
+	bool can_pause;
+};
+#endif
+
+#endif