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/*
flext - C++ layer for Max/MSP and pd (pure data) externals
Copyright (c) 2001-2005 Thomas Grill (gr@grrrr.org)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
*/
/*! \file flbuf.cpp
\brief Implementation of the buffer abstraction class.
*/
#include "flext.h"
#include "flfeatures.h"
#if FLEXT_SYS != FLEXT_SYS_JMAX
#if FLEXT_SYS == FLEXT_SYS_PD
#define DIRTY_INTERVAL 0 // buffer dirty check in msec
#endif
#if FLEXT_SYS == FLEXT_SYS_MAX
// defined in flsupport.cpp
extern const t_symbol *sym_buffer,*sym_size;
#endif
flext::buffer::buffer(const t_symbol *bn,bool delayed):
sym(NULL),data(NULL),
chns(0),frames(0)
{
#if FLEXT_SYS == FLEXT_SYS_PD
arr = NULL;
interval = DIRTY_INTERVAL;
isdirty = false;
ticking = false;
tick = clock_new(this,(t_method)cb_tick);
#endif
if(bn) Set(bn,delayed);
ClearDirty();
}
flext::buffer::~buffer()
{
#if FLEXT_SYS == FLEXT_SYS_PD
clock_free(tick);
#endif
}
int flext::buffer::Set(const t_symbol *s,bool nameonly)
{
int ret = 0;
bool valid = data != NULL; // valid now? (before change)
if(s && sym != s) {
ret = 1;
data = NULL;
frames = 0;
chns = 0;
}
if(s && *GetString(s)) sym = s;
if(!sym) {
if(valid) ret = -1;
}
else if(!nameonly) {
#if FLEXT_SYS == FLEXT_SYS_PD
int frames1;
t_sample *data1;
arr = (t_garray *)pd_findbyclass(const_cast<t_symbol *>(sym), garray_class);
if(!arr)
{
if (*GetString(sym)) FLEXT_LOG1("buffer: no such array '%s'",GetString(sym));
// sym = NULL;
if(valid) ret = -1;
}
else if(!garray_getfloatarray(arr, &frames1, &data1))
{
error("buffer: bad template '%s'",GetString(sym));
data = NULL;
frames = 0;
if(valid) ret = -1;
}
else {
ret = 0;
garray_usedindsp(arr);
if(frames != frames1) { frames = frames1; if(!ret) ret = 1; }
if(data != data1) { data = data1; if(!ret) ret = 1; }
chns = 1;
}
#elif FLEXT_SYS == FLEXT_SYS_MAX
if(sym->s_thing) {
const t_buffer *p = (const t_buffer *)sym->s_thing;
FLEXT_ASSERT(!NOGOOD(p));
if(ob_sym(p) != sym_buffer) {
post("buffer: object '%s' not valid (type %s)",GetString(sym),GetString(ob_sym(p)));
if(valid) ret = -2;
}
else {
#ifdef FLEXT_DEBUG
// post("flext: buffer object '%s' - valid:%i samples:%i channels:%i frames:%i",GetString(sym),p->b_valid,p->b_frames,p->b_nchans,p->b_frames);
#endif
if(data != p->b_samples) { data = p->b_samples; if(!ret) ret = 1; }
if(chns != p->b_nchans) { chns = p->b_nchans; if(!ret) ret = 1; }
if(frames != p->b_frames) { frames = p->b_frames; if(!ret) ret = 1; }
}
}
else {
FLEXT_LOG1("buffer: symbol '%s' not defined", GetString(sym));
/*if(valid)*/ ret = -1;
}
#else
#error not implemented
#endif
}
return ret;
}
bool flext::buffer::Update()
{
FLEXT_ASSERT(sym);
bool upd = false;
#if FLEXT_SYS == FLEXT_SYS_PD
if(!arr) return data == NULL;
int frames1;
t_sample *data1;
if(!garray_getfloatarray(arr, &frames1, &data1)) {
data = NULL;
chns = 0;
frames = 0;
upd = true;
}
else if(data != data1 || frames != frames1) {
data = data1;
frames = frames1;
upd = true;
}
#elif FLEXT_SYS == FLEXT_SYS_MAX
const t_buffer *p = (const t_buffer *)sym->s_thing;
if(p) {
FLEXT_ASSERT(!NOGOOD(p) && ob_sym(p) == sym_buffer);
if(data != p->b_samples || chns != p->b_nchans || frames != p->b_frames) {
data = p->b_samples;
chns = p->b_nchans;
frames = p->b_frames;
upd = true;
}
}
else {
// buffer~ has e.g. been renamed
data = NULL;
chns = 0;
frames = 0;
upd = true;
}
#else
#error not implemented
#endif
return upd;
}
flext::buffer::lock_t flext::buffer::Lock()
{
FLEXT_ASSERT(sym);
#if FLEXT_SYS == FLEXT_SYS_PD
FLEXT_ASSERT(arr);
#ifdef _FLEXT_HAVE_PD_GARRAYLOCKS
garray_lock(arr);
#endif
return false;
#elif FLEXT_SYS == FLEXT_SYS_MAX
t_buffer *p = (t_buffer *)sym->s_thing;
FLEXT_ASSERT(p);
#ifdef _FLEXT_HAVE_MAX_INUSEFLAG
long old = p->b_inuse;
p->b_inuse = 1;
return old;
#else
return 0;
#endif
#else
#error not implemented
#endif
}
void flext::buffer::Unlock(flext::buffer::lock_t prv)
{
FLEXT_ASSERT(sym);
#if FLEXT_SYS == FLEXT_SYS_PD
FLEXT_ASSERT(arr);
#ifdef _FLEXT_HAVE_PD_GARRAYLOCKS
garray_unlock(arr);
#endif
#elif FLEXT_SYS == FLEXT_SYS_MAX
t_buffer *p = (t_buffer *)sym->s_thing;
FLEXT_ASSERT(p);
#ifdef _FLEXT_HAVE_MAX_INUSEFLAG
p->b_inuse = prv;
#endif
#else
#error not implemented
#endif
}
void flext::buffer::Frames(int fr,bool keep,bool zero)
{
FLEXT_ASSERT(sym);
#if FLEXT_SYS == FLEXT_SYS_PD
// is this function guaranteed to keep memory and set rest to zero?
::garray_resize(arr,(float)fr);
Update();
#elif FLEXT_SYS == FLEXT_SYS_MAX
t_sample *tmp = NULL;
int sz = frames;
if(fr < sz) sz = fr;
if(keep) {
// copy buffer data to tmp storage
tmp = (t_sample *)NewAligned(sz*sizeof(t_sample));
FLEXT_ASSERT(tmp);
CopySamples(tmp,data,sz);
}
t_atom msg;
t_buffer *buf = (t_buffer *)sym->s_thing;
// b_msr reflects buffer sample rate... is this what we want?
// Max bug: adding half a sample to prevent roundoff errors....
float ms = (fr+0.5)/buf->b_msr;
SetFloat(msg,ms);
::typedmess((object *)buf,(t_symbol *)sym_size,1,&msg);
Update();
if(tmp) {
// copy data back
CopySamples(data,tmp,sz);
FreeAligned(tmp);
if(zero && sz < fr) ZeroSamples(data+sz,fr-sz);
}
else
if(zero) ZeroSamples(data,fr);
#else
#error
#endif
}
#if FLEXT_SYS == FLEXT_SYS_PD
void flext::buffer::SetRefrIntv(float intv)
{
interval = intv;
if(interval == 0 && ticking) {
clock_unset(tick);
ticking = false;
}
}
#elif FLEXT_SYS == FLEXT_SYS_MAX
void flext::buffer::SetRefrIntv(float) {}
#else
#error
#endif
void flext::buffer::Dirty(bool force)
{
FLEXT_ASSERT(sym);
#if FLEXT_SYS == FLEXT_SYS_PD
if((!ticking) && (interval || force)) {
ticking = true;
cb_tick(this); // immediately redraw
}
else {
if(force) clock_delay(tick,0);
isdirty = true;
}
#elif FLEXT_SYS == FLEXT_SYS_MAX
t_buffer *p = (t_buffer *)sym->s_thing;
FLEXT_ASSERT(p && !NOGOOD(p));
p->b_modtime = gettime();
#else
#error Not implemented
#endif
}
#if FLEXT_SYS == FLEXT_SYS_PD
void flext::buffer::cb_tick(buffer *b)
{
if(b->arr) garray_redraw(b->arr);
#ifdef FLEXT_DEBUG
else error("buffer: array is NULL");
#endif
if(b->isdirty && b->interval) {
b->isdirty = false;
b->ticking = true;
clock_delay(b->tick,b->interval);
}
else
b->ticking = false;
}
#endif
void flext::buffer::ClearDirty()
{
#if FLEXT_SYS == FLEXT_SYS_PD
cleantime = clock_getlogicaltime();
#elif FLEXT_SYS == FLEXT_SYS_MAX
cleantime = gettime();
#else
#error Not implemented
#endif
}
bool flext::buffer::IsDirty() const
{
if(!sym) return false;
#if FLEXT_SYS == FLEXT_SYS_PD
#ifdef _FLEXT_HAVE_PD_GARRAYUPDATETIME
return arr && (isdirty || garray_updatetime(arr) > cleantime);
#else
// Don't know.... (no method in PD judging whether buffer has been changed from outside flext...)
return true;
#endif
#elif FLEXT_SYS == FLEXT_SYS_MAX
t_buffer *p = (t_buffer *)sym->s_thing;
FLEXT_ASSERT(p && !NOGOOD(p));
return p->b_modtime > cleantime;
#else
#error Not implemented
#endif
}
#endif // Jmax
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