From f3f3f15d90ae9c0a8fec183efdfd0dcb8bd054eb Mon Sep 17 00:00:00 2001
From: Winfried Ritsch <ritsch@users.sourceforge.net>
Date: Tue, 3 May 2005 07:18:08 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r2884, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/iem/iemstream/; revision=2885
---
 stream.h | 160 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 stream.h

(limited to 'stream.h')

diff --git a/stream.h b/stream.h
new file mode 100644
index 0000000..b55c8ed
--- /dev/null
+++ b/stream.h
@@ -0,0 +1,160 @@
+/*************************************************************
+ *
+ *    streaming external for PD
+ *
+ * File: stream.h
+ *
+ * Description: Declaration of the streamer class
+ *
+ * Author: Thomas Grill (t.grill@gmx.net)
+ *
+ *************************************************************/
+
+#ifndef __STREAM_H
+#define __STREAM_H
+
+#include <pthread.h>
+ 
+#include <assert.h>
+#define ASSERT assert
+
+#include <string>
+
+#include <samplerate.h>
+
+#include "fifo.h"
+#include "socket.h"
+
+
+/*! Class representing an abstract stream.
+	\note Must be inherited for a special stream format
+*/
+class Stream
+{
+public:
+	Stream();
+	virtual ~Stream();
+
+	//! Return true if in initializing state
+	bool isInitializing() const { return state == ST_INIT || state == ST_RECONNECT; }
+	//! Return true if socket is valid
+	bool isOk() const { return file >= 0; }
+
+	// Get/set size of encoder FIFO
+	int getStreamBufSize() const { return encoded.Size(); }
+	bool setStreamBufSize(int sz) { return encoded.Resize(sz,true); }
+
+	// Get/set size of encoder chunk (amount of data written from the stream at once)
+	int getStreamBufChunk() const { return encchunk; }
+	void setStreamBufChunk(int sz) { if(encchunk > 0) encchunk = sz; }
+
+	// Get/set buffer size ratio under which refilling is triggered (0...1)
+	float getStreamBufThresh() const { return encthresh; }
+	void setStreamBufThresh(float r) { if(encthresh > 0 && encthresh <= 1) encthresh = r; }
+
+	//! Get ratio of filling (0...1)
+	float getFilling() const { return (float)encoded.Have()/encoded.Size(); }
+
+	//! name of stream
+	virtual std::string getTag(const char *tag) const { return ""; }
+	//! number of stream channels
+	virtual int getChannels() const = 0;
+	//! stream sample rate
+	virtual float getSamplerate() const = 0;
+	//! nominal stream bit rate
+	virtual float getBitrate() const = 0;
+
+	const std::string &getHostname() const { return hostname; }
+	const std::string &getMountpoint() const { return mountpt; }
+	int getPort() const { return port; }
+
+	/*! Initialize stream */
+	bool doInit(const char *url);
+
+	/*! Disconnect from stream */
+	bool doExit();
+
+	//! Get a number of sample frames
+	int doGet(int ch,float *const *buf,int frames,float sr);
+
+	// Debug flag
+	volatile bool debug;
+
+protected:
+
+	//! Reset encoder state (disconnect and clear FIFOs)
+	virtual void Reset();
+	//! Reset URL
+	void ResetHost();
+
+	//! Init decoder
+	virtual bool WorkInit() = 0;
+	//! Decode data to channel buffers
+	virtual int DataRead(int frames) = 0;
+
+	//! Read stream data to encoder FIFO
+	int ReadChunk(int chunk,bool unlock);
+	//! Read stream data to buffer
+	int ReadChunk(char *buf,int chunk,bool unlock);
+
+	//! Set hostname, mountpt, port
+	bool SetURL(const char *url);
+
+	std::string hostname,mountpt;
+	int port;
+
+	// --- FIFO for encoded stream data -----------------------
+
+	int encchunk;		//! Size of data chunk to get from socket at once
+	float encthresh;	//! Ratio of fifo filling to keep up to
+	Fifo<char> encoded; //! Fifo for encoded stream data
+
+	// --- low-level socket stuff ------------------------------
+
+	//! stream socket
+	volatile SOCKET file;
+
+	//! Connect to stream
+	static SOCKET Connect(const char *hostname,const char *mountpoint,int portno);
+	//! Disonnect from stream
+	static void Disconnect(SOCKET fd);
+	//! Read data from stream
+	static int Read(SOCKET fd,char *buf,int size,int timeout = 1000);
+
+	// --- threading stuff -------------------------------------
+
+	//! status type
+	enum state_t {
+		ST_IDLE,  // nothing to do
+		ST_INIT,  // shall connect
+		ST_PROCESS,  // do decoding
+		ST_WAIT,  // wait a bit
+		ST_RECONNECT,  // try to reconnect
+		ST_FINISHED  // waiting for shutdown
+	};
+
+	volatile bool exit;  //! exit flag
+	volatile state_t state;  //! decoder state 
+	pthread_mutex_t mutex;  //! thread mutex
+	pthread_cond_t cond;	//! thread conditional
+	pthread_t thrid;  //! worker thread ID
+
+	int waitgrain,waitreconnect;
+
+	static void *thr_func(void *th);
+	void Work();
+
+	// --- channel buffers --------------------------------------
+
+	int bufch;
+	float **bufs;
+	Fifo<float> *decoded;
+
+	// --- SRC stuff --------------------------------------------
+
+	int src_channels;
+	double src_factor;
+	SRC_STATE **src_state;
+};
+
+#endif // __STREAM_H
-- 
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