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/*************************************************************
*
* streaming external for PD
*
* File: main.cpp
*
* Description: PD class definition
*
* Author: Thomas Grill (t.grill@gmx.net)
*
*************************************************************/
//! Version number of this external
#define __STREAM_VERSION "0.1.0"
// prevent MSVC "extern" warning
#ifdef _MSC_VER
#pragma warning( disable : 4091 )
#endif
// headers contained in the PD distribution
#include <m_pd.h>
#include <pthread.h>
// include stream class
#include "streamogg.h"
//! PD class
static t_class *amp_class = NULL;
//! PD object structure
struct t_amp
{
t_object obj;
Stream *stream;
int channels;
int vecsz;
float srate;
t_sample **outsigs;
t_outlet *dumpout;
t_clock *clk;
int clkrate;
};
/*! periodic clock function for output of buffer filling status */
static void amp_clock(t_amp *x)
{
outlet_float(x->dumpout,x->stream->getFilling());
// retrigger clock
if(x->clkrate) clock_delay(x->clk,x->clkrate);
}
/*! PD object constructor
\param fchannels number of channels (stream can have less)
*/
static void *amp_new(t_floatarg fchannels)
{
int channels = (int)fchannels;
if(channels == 0) channels = 2;
else
if(channels < 1) return NULL;
// make PD object
t_amp *x = (t_amp *)pd_new(amp_class);
x->channels = channels;
x->outsigs = new t_sample *[channels];
x->stream = new StreamOGG;
// make signal outlets
for(int i = 0; i < channels; i++)
outlet_new(&x->obj, gensym("signal"));
// additional dump outlet (e.g. buffer filling status)
x->dumpout = outlet_new(&x->obj, gensym("anything"));
// set clock function
x->clk = clock_new(x,(t_method)amp_clock);
x->clkrate = 0;
return x;
}
/*! PD object destructor */
static void amp_free(t_amp *x)
{
delete[] x->outsigs;
delete x->stream;
clock_free(x->clk);
}
/*! DSP function -> delegate processing to stream */
static t_int *amp_perform(t_int *w)
{
t_amp *x = (t_amp *)w[1];
x->stream->doGet(x->channels,x->outsigs,x->vecsz,x->srate);
return w+2;
}
/*! set up DSP */
static void amp_dsp(t_amp *x, t_signal **sp)
{
x->vecsz = sp[0]->s_n;
x->srate = sp[0]->s_sr;
// store outlet signal vectors
for(int i = 0; i < x->channels; ++i)
x->outsigs[i] = sp[i]->s_vec;
dsp_add(amp_perform, 1, x);
}
/*! Connect to stream
\param s URL of stream
*/
static void amp_connect(t_amp *x,const t_symbol *s)
{
x->stream->doInit(s->s_name);
}
/*! Disconnect from stream */
static void amp_disconnect(t_amp *x)
{
x->stream->doExit();
}
/*! Set/Clear debug mode
\param f 0/1 ... debug mode off/on
*/
static void amp_debug(t_amp *x,t_floatarg f)
{
x->stream->debug = (f != 0);
}
/*! Set tick rate for buffer filling status
\param f tick rate in ms
*/
static void amp_tick(t_amp *x,t_floatarg f)
{
ASSERT(f >= 0);
x->clkrate = (int)f;
if(f) clock_delay(x->clk,f);
else clock_unset(x->clk);
}
/*! Set decoder FIFO size */
static void amp_strbuf(t_amp *x,t_floatarg f)
{
x->stream->setStreamBufSize((int)f);
}
/*! Set decoder chunk size */
static void amp_strchunk(t_amp *x,t_floatarg f)
{
x->stream->setStreamBufChunk((int)f);
}
/*! Set decoder filling threshold ratio */
static void amp_strthresh(t_amp *x,t_floatarg f)
{
x->stream->setStreamBufThresh(f);
}
/*! Output number of stream channels to dump outlet */
static void amp_getchannels(t_amp *x)
{
t_atom a;
SETFLOAT(&a,x->stream->getChannels());
outlet_anything(x->dumpout,gensym("channels"),1,&a);
}
/*! Output sample rate to dump outlet */
static void amp_getsrate(t_amp *x)
{
t_atom a;
SETFLOAT(&a,x->stream->getSamplerate());
outlet_anything(x->dumpout,gensym("srate"),1,&a);
}
/*! Output bitrate to dump outlet */
static void amp_getbrate(t_amp *x)
{
t_atom a;
SETFLOAT(&a,x->stream->getBitrate());
outlet_anything(x->dumpout,gensym("brate"),1,&a);
}
/*! Output a stream tag to dump outlet
\param sym name of tag to output
*/
static void amp_gettag(t_amp *x,const t_symbol *sym)
{
t_atom a[2];
SETSYMBOL(a+0,const_cast<t_symbol *>(sym));
SETSYMBOL(a+1,gensym(const_cast<char *>(x->stream->getTag(sym->s_name).c_str())));
outlet_anything(x->dumpout,gensym("tag"),2,a);
}
/*! External setup routine of PD class
\note Must be exported from shared library
*/
extern "C"
#ifdef _MSC_VER
__declspec(dllexport)
#endif
void stream_setup()
{
// post some message to the console
post("Stream, version " __STREAM_VERSION ", (C)2003 IEM Graz");
post("objects: amp~");
post("");
// register the xmlrpc class
amp_class = class_new(gensym("amp~"),(t_newmethod)amp_new,(t_method)amp_free,sizeof(t_amp),0, A_DEFFLOAT,A_NULL);
// register methods
class_addmethod(amp_class, (t_method)amp_dsp, gensym("dsp"), A_NULL);
class_addmethod(amp_class, (t_method)amp_connect, gensym("connect"), A_SYMBOL, A_NULL);
class_addmethod(amp_class, (t_method)amp_disconnect, gensym("disconnect"), A_NULL);
class_addmethod(amp_class, (t_method)amp_debug, gensym("debug"), A_FLOAT, A_NULL);
class_addmethod(amp_class, (t_method)amp_tick, gensym("tick"), A_FLOAT, A_NULL);
class_addmethod(amp_class, (t_method)amp_strbuf, gensym("strbuf"), A_FLOAT, A_NULL);
class_addmethod(amp_class, (t_method)amp_strchunk, gensym("strchunk"), A_FLOAT, A_NULL);
class_addmethod(amp_class, (t_method)amp_strthresh, gensym("strthresh"), A_FLOAT, A_NULL);
class_addmethod(amp_class, (t_method)amp_getchannels, gensym("getchannels"), A_NULL);
class_addmethod(amp_class, (t_method)amp_getsrate, gensym("getsrate"), A_NULL);
class_addmethod(amp_class, (t_method)amp_getbrate, gensym("getbrate"), A_NULL);
class_addmethod(amp_class, (t_method)amp_gettag, gensym("gettag"), A_SYMBOL,A_NULL);
}
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