/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* this file handles Max-style patchable objects, i.e., objects which
can interconnect via inlets and outlets; also, the (terse) generic
behavior for "gobjs" appears at the end of this file. */
#include "m_pd.h"
#include "m_imp.h"
union inletunion
{
t_symbol *iu_symto;
t_gpointer *iu_pointerslot;
t_float *iu_floatslot;
t_symbol **iu_symslot;
t_sample iu_floatsignalvalue;
};
struct _inlet
{
t_pd i_pd;
struct _inlet *i_next;
t_object *i_owner;
t_pd *i_dest;
t_symbol *i_symfrom;
union inletunion i_un;
};
#define i_symto i_un.iu_symto
#define i_pointerslot i_un.iu_pointerslot
#define i_floatslot i_un.iu_floatslot
#define i_symslot i_un.iu_symslot
static t_class *inlet_class, *pointerinlet_class, *floatinlet_class,
*symbolinlet_class;
#define ISINLET(pd) ((*(pd) == inlet_class) || \
(*(pd) == pointerinlet_class) || \
(*(pd) == floatinlet_class) || \
(*(pd) == symbolinlet_class))
/* --------------------- generic inlets ala max ------------------ */
t_inlet *inlet_new(t_object *owner, t_pd *dest, t_symbol *s1, t_symbol *s2)
{
t_inlet *x = (t_inlet *)pd_new(inlet_class), *y, *y2;
x->i_owner = owner;
x->i_dest = dest;
if (s1 == &s_signal)
x->i_un.iu_floatsignalvalue = 0;
else x->i_symto = s2;
x->i_symfrom = s1;
x->i_next = 0;
if((y = owner->ob_inlet))
{
while((y2 = y->i_next)) y = y2;
y->i_next = x;
}
else owner->ob_inlet = x;
return (x);
}
static void inlet_wrong(t_inlet *x, t_symbol *s)
{
pd_error(x->i_owner, "inlet: expected '%s' but got '%s'",
x->i_symfrom->s_name, s->s_name);
}
/* LATER figure out how to make these efficient: */
static void inlet_bang(t_inlet *x)
{
if (x->i_symfrom == &s_bang)
pd_vmess(x->i_dest, x->i_symto, "");
else if (!x->i_symfrom) pd_bang(x->i_dest);
else inlet_wrong(x, &s_bang);
}
static void inlet_pointer(t_inlet *x, t_gpointer *gp)
{
if (x->i_symfrom == &s_pointer)
pd_vmess(x->i_dest, x->i_symto, "p", gp);
else if (!x->i_symfrom) pd_pointer(x->i_dest, gp);
else inlet_wrong(x, &s_pointer);
}
static void inlet_float(t_inlet *x, t_float f)
{
if (x->i_symfrom == &s_float)
pd_vmess(x->i_dest, x->i_symto, "f", (t_floatarg)f);
else if (x->i_symfrom == &s_signal)
x->i_un.iu_floatsignalvalue = ftofix(f);
else if (!x->i_symfrom)
pd_float(x->i_dest, f);
else inlet_wrong(x, &s_float);
}
static void inlet_symbol(t_inlet *x, t_symbol *s)
{
if (x->i_symfrom == &s_symbol)
pd_vmess(x->i_dest, x->i_symto, "s", s);
else if (!x->i_symfrom) pd_symbol(x->i_dest, s);
else inlet_wrong(x, &s_symbol);
}
static void inlet_list(t_inlet *x, t_symbol *s, int argc, t_atom *argv)
{
#ifndef ROCKBOX
t_atom at;
#endif
if (x->i_symfrom == &s_list || x->i_symfrom == &s_float
|| x->i_symfrom == &s_symbol || x->i_symfrom == &s_pointer)
typedmess(x->i_dest, x->i_symto, argc, argv);
else if (!x->i_symfrom) pd_list(x->i_dest, s, argc, argv);
else inlet_wrong(x, &s_list);
}
static void inlet_anything(t_inlet *x, t_symbol *s, int argc, t_atom *argv)
{
if (x->i_symfrom == s)
typedmess(x->i_dest, x->i_symto, argc, argv);
else if (!x->i_symfrom)
typedmess(x->i_dest, s, argc, argv);
else inlet_wrong(x, s);
}
void inlet_free(t_inlet *x)
{
t_object *y = x->i_owner;
t_inlet *x2;
if (y->ob_inlet == x) y->ob_inlet = x->i_next;
else for (x2 = y->ob_inlet; x2; x2 = x2->i_next)
if (x2->i_next == x)
{
x2->i_next = x->i_next;
break;
}
t_freebytes(x, sizeof(*x));
}
/* ----- pointerinlets, floatinlets, syminlets: optimized inlets ------- */
static void pointerinlet_pointer(t_inlet *x, t_gpointer *gp)
{
gpointer_unset(x->i_pointerslot);
*(x->i_pointerslot) = *gp;
if (gp->gp_stub) gp->gp_stub->gs_refcount++;
}
t_inlet *pointerinlet_new(t_object *owner, t_gpointer *gp)
{
t_inlet *x = (t_inlet *)pd_new(pointerinlet_class), *y, *y2;
x->i_owner = owner;
x->i_dest = 0;
x->i_symfrom = &s_pointer;
x->i_pointerslot = gp;
x->i_next = 0;
if((y = owner->ob_inlet))
{
while((y2 = y->i_next)) y = y2;
y->i_next = x;
}
else owner->ob_inlet = x;
return (x);
}
static void floatinlet_float(t_inlet *x, t_float f)
{
*(x->i_floatslot) = f;
}
t_inlet *floatinlet_new(t_object *owner, t_float *fp)
{
t_inlet *x = (t_inlet *)pd_new(floatinlet_class), *y, *y2;
x->i_owner = owner;
x->i_dest = 0;
x->i_symfrom = &s_float;
x->i_floatslot = fp;
x->i_next = 0;
if((y = owner->ob_inlet))
{
while((y2 = y->i_next)) y = y2;
y->i_next = x;
}
else owner->ob_inlet = x;
return (x);
}
static void symbolinlet_symbol(t_inlet *x, t_symbol *s)
{
*(x->i_symslot) = s;
}
t_inlet *symbolinlet_new(t_object *owner, t_symbol **sp)
{
t_inlet *x = (t_inlet *)pd_new(symbolinlet_class), *y, *y2;
x->i_owner = owner;
x->i_dest = 0;
x->i_symfrom = &s_symbol;
x->i_symslot = sp;
x->i_next = 0;
if((y = owner->ob_inlet))
{
while((y2 = y->i_next)) y = y2;
y->i_next = x;
}
else owner->ob_inlet = x;
return (x);
}
/* ---------------------- routine to handle lists ---------------------- */
/* objects interpret lists by feeding them to the individual inlets.
Before you call this check that the object doesn't have a more
specific way to handle lists. */
void obj_list(t_object *x, t_symbol *s, int argc, t_atom *argv)
{
t_atom *ap;
int count;
t_inlet *ip = ((t_object *)x)->ob_inlet;
#ifdef ROCKBOX
(void) s;
#endif
if (!argc) return;
for (count = argc-1, ap = argv+1; ip && count--; ap++, ip = ip->i_next)
{
if (ap->a_type == A_POINTER) pd_pointer(&ip->i_pd, ap->a_w.w_gpointer);
else if (ap->a_type == A_FLOAT) pd_float(&ip->i_pd, ap->a_w.w_float);
else pd_symbol(&ip->i_pd, ap->a_w.w_symbol);
}
if (argv->a_type == A_POINTER) pd_pointer(&x->ob_pd, argv->a_w.w_gpointer);
else if (argv->a_type == A_FLOAT) pd_float(&x->ob_pd, argv->a_w.w_float);
else pd_symbol(&x->ob_pd, argv->a_w.w_symbol);
}
void obj_init(void)
{
inlet_class = class_new(gensym("inlet"), 0, 0,
sizeof(t_inlet), CLASS_PD, 0);
class_addbang(inlet_class, inlet_bang);
class_addpointer(inlet_class, inlet_pointer);
class_addfloat(inlet_class, inlet_float);
class_addsymbol(inlet_class, inlet_symbol);
class_addlist(inlet_class, inlet_list);
class_addanything(inlet_class, inlet_anything);
pointerinlet_class = class_new(gensym("inlet"), 0, 0,
sizeof(t_inlet), CLASS_PD, 0);
class_addpointer(pointerinlet_class, pointerinlet_pointer);
floatinlet_class = class_new(gensym("inlet"), 0, 0,
sizeof(t_inlet), CLASS_PD, 0);
class_addfloat(floatinlet_class, (t_method)floatinlet_float);
symbolinlet_class = class_new(gensym("inlet"), 0, 0,
sizeof(t_inlet), CLASS_PD, 0);
class_addsymbol(symbolinlet_class, symbolinlet_symbol);
}
/* --------------------------- outlets ------------------------------ */
static char *stacklimit, *topstack;
#define STACKSIZE 1000000
static int outlet_eventno;
/* set a stack limit (on each incoming event that can set off messages)
for the outlet functions to check to prevent stack overflow from message
recursion */
void outlet_setstacklim(void)
{
char c;
topstack = &c;
stacklimit = (&c) - STACKSIZE;
outlet_eventno++;
}
/* get a number unique to the (clock, MIDI, GUI, etc.) event we're on */
int sched_geteventno( void)
{
return (outlet_eventno);
}
struct _outconnect
{
struct _outconnect *oc_next;
t_pd *oc_to;
};
struct _outlet
{
t_object *o_owner;
struct _outlet *o_next;
t_outconnect *o_connections;
t_symbol *o_sym;
};
t_outlet *outlet_new(t_object *owner, t_symbol *s)
{
t_outlet *x = (t_outlet *)getbytes(sizeof(*x)), *y, *y2;
x->o_owner = owner;
x->o_next = 0;
if((y = owner->ob_outlet))
{
while((y2 = y->o_next)) y = y2;
y->o_next = x;
}
else owner->ob_outlet = x;
x->o_connections = 0;
x->o_sym = s;
return (x);
}
static void outlet_stackerror(t_outlet *x)
{
pd_error(x->o_owner, "stack overflow");
stacklimit = topstack;
}
void outlet_bang(t_outlet *x)
{
t_outconnect *oc;
char c;
if (&c < stacklimit)
outlet_stackerror(x);
else for (oc = x->o_connections; oc; oc = oc->oc_next)
pd_bang(oc->oc_to);
}
void outlet_pointer(t_outlet *x, t_gpointer *gp)
{
t_outconnect *oc;
t_gpointer gpointer;
char c;
if (&c < stacklimit)
outlet_stackerror(x);
else
{
#if 0
gpointer_copy(gp, &gpointer);
for (oc = x->o_connections; oc; oc = oc->oc_next)
pd_pointer(oc->oc_to, &gpointer);
gpointer_unset(&gpointer);
#else
gpointer = *gp;
for (oc = x->o_connections; oc; oc = oc->oc_next)
pd_pointer(oc->oc_to, &gpointer);
#endif
}
}
void outlet_float(t_outlet *x, t_float f)
{
t_outconnect *oc;
char c;
if (&c < stacklimit)
outlet_stackerror(x);
else for (oc = x->o_connections; oc; oc = oc->oc_next)
pd_float(oc->oc_to, f);
}
void outlet_symbol(t_outlet *x, t_symbol *s)
{
t_outconnect *oc;
char c;
if (&c < stacklimit)
outlet_stackerror(x);
else for (oc = x->o_connections; oc; oc = oc->oc_next)
pd_symbol(oc->oc_to, s);
}
void outlet_list(t_outlet *x, t_symbol *s, int argc, t_atom *argv)
{
t_outconnect *oc;
char c;
if (&c < stacklimit)
outlet_stackerror(x);
else for (oc = x->o_connections; oc; oc = oc->oc_next)
pd_list(oc->oc_to, s, argc, argv);
}
void outlet_anything(t_outlet *x, t_symbol *s, int argc, t_atom *argv)
{
t_outconnect *oc;
char c;
if (&c < stacklimit)
outlet_stackerror(x);
else for (oc = x->o_connections; oc; oc = oc->oc_next)
typedmess(oc->oc_to, s, argc, argv);
}
/* get the outlet's declared symbol */
t_symbol *outlet_getsymbol(t_outlet *x)
{
return (x->o_sym);
}
void outlet_free(t_outlet *x)
{
t_object *y = x->o_owner;
t_outlet *x2;
if (y->ob_outlet == x) y->ob_outlet = x->o_next;
else for (x2 = y->ob_outlet; x2; x2 = x2->o_next)
if (x2->o_next == x)
{
x2->o_next = x->o_next;
break;
}
t_freebytes(x, sizeof(*x));
}
t_outconnect *obj_connect(t_object *source, int outno,
t_object *sink, int inno)
{
t_inlet *i;
t_outlet *o;
t_pd *to;
t_outconnect *oc, *oc2;
for (o = source->ob_outlet; o && outno; o = o->o_next, outno--) ;
if (!o) return (0);
if (sink->ob_pd->c_firstin)
{
if (!inno)
{
to = &sink->ob_pd;
goto doit;
}
else inno--;
}
for (i = sink->ob_inlet; i && inno; i = i->i_next, inno--) ;
if (!i) return (0);
to = &i->i_pd;
doit:
oc = (t_outconnect *)t_getbytes(sizeof(*oc));
oc->oc_next = 0;
oc->oc_to = to;
/* append it to the end of the list */
/* LATER we might cache the last "oc" to make this faster. */
if ((oc2 = o->o_connections))
{
while (oc2->oc_next) oc2 = oc2->oc_next;
oc2->oc_next = oc;
}
else o->o_connections = oc;
if (o->o_sym == &s_signal) canvas_update_dsp();
return (oc);
}
void obj_disconnect(t_object *source, int outno, t_object *sink, int inno)
{
t_inlet *i;
t_outlet *o;
t_pd *to;
t_outconnect *oc, *oc2;
for (o = source->ob_outlet; o && outno; o = o->o_next, outno--)
if (!o) return;
if (sink->ob_pd->c_firstin)
{
if (!inno)
{
to = &sink->ob_pd;
goto doit;
}
else inno--;
}
for (i = sink->ob_inlet; i && inno; i = i->i_next, inno--) ;
if (!i) return;
to = &i->i_pd;
doit:
if (!(oc = o->o_connections)) return;
if (oc->oc_to == to)
{
o->o_connections = oc->oc_next;
freebytes(oc, sizeof(*oc));
goto done;
}
while((oc2 = oc->oc_next))
{
if (oc2->oc_to == to)
{
oc->oc_next = oc2->oc_next;
freebytes(oc2, sizeof(*oc2));
goto done;
}
oc = oc2;
}
done:
if (o->o_sym == &s_signal) canvas_update_dsp();
}
/* ------ traversal routines for code that can't see our structures ------ */
int obj_noutlets(t_object *x)
{
int n;
t_outlet *o;
for (o = x->ob_outlet, n = 0; o; o = o->o_next) n++;
return (n);
}
int obj_ninlets(t_object *x)
{
int n;
t_inlet *i;
for (i = x->ob_inlet, n = 0; i; i = i->i_next) n++;
if (x->ob_pd->c_firstin) n++;
return (n);
}
t_outconnect *obj_starttraverseoutlet(t_object *x, t_outlet **op, int nout)
{
t_outlet *o = x->ob_outlet;
while (nout-- && o) o = o->o_next;
*op = o;
if (o) return (o->o_connections);
else return (0);
}
t_outconnect *obj_nexttraverseoutlet(t_outconnect *lastconnect,
t_object **destp, t_inlet **inletp, int *whichp)
{
t_pd *y;
y = lastconnect->oc_to;
if (ISINLET(y))
{
int n;
t_inlet *i = (t_inlet *)y, *i2;
t_object *dest = i->i_owner;
for (n = dest->ob_pd->c_firstin, i2 = dest->ob_inlet;
i2 && i2 != i; i2 = i2->i_next) n++;
*whichp = n;
*destp = dest;
*inletp = i;
}
else
{
*whichp = 0;
*inletp = 0;
*destp = ((t_object *)y);
}
return (lastconnect->oc_next);
}
/* this one checks that a pd is indeed a patchable object, and returns
it, correctly typed, or zero if the check failed. */
t_object *pd_checkobject(t_pd *x)
{
if ((*x)->c_patchable) return ((t_object *)x);
else return (0);
}
/* move an inlet or outlet to the head of the list */
void obj_moveinletfirst(t_object *x, t_inlet *i)
{
t_inlet *i2;
if (x->ob_inlet == i) return;
else for (i2 = x->ob_inlet; i2; i2 = i2->i_next)
if (i2->i_next == i)
{
i2->i_next = i->i_next;
i->i_next = x->ob_inlet;
x->ob_inlet = i;
return;
}
}
void obj_moveoutletfirst(t_object *x, t_outlet *o)
{
t_outlet *o2;
if (x->ob_outlet == o) return;
else for (o2 = x->ob_outlet; o2; o2 = o2->o_next)
if (o2->o_next == o)
{
o2->o_next = o->o_next;
o->o_next = x->ob_outlet;
x->ob_outlet = o;
return;
}
}
/* routines for DSP sorting, which are used in d_ugen.c and g_canvas.c */
/* LATER try to consolidate all the slightly different routines. */
int obj_nsiginlets(t_object *x)
{
int n;
t_inlet *i;
for (i = x->ob_inlet, n = 0; i; i = i->i_next)
if (i->i_symfrom == &s_signal) n++;
if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin) n++;
return (n);
}
/* get the index, among signal inlets, of the mth inlet overall */
int obj_siginletindex(t_object *x, int m)
{
int n = 0;
t_inlet *i;
if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin)
{
if (!m--) return (0);
n++;
}
for (i = x->ob_inlet; i; i = i->i_next, m--)
if (i->i_symfrom == &s_signal)
{
if (m == 0) return (n);
n++;
}
return (-1);
}
int obj_issignalinlet(t_object *x, int m)
{
t_inlet *i;
if (x->ob_pd->c_firstin)
{
if (!m)
return (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin);
else m--;
}
for (i = x->ob_inlet; i && m; i = i->i_next, m--)
;
return (i && (i->i_symfrom == &s_signal));
}
int obj_nsigoutlets(t_object *x)
{
int n;
t_outlet *o;
for (o = x->ob_outlet, n = 0; o; o = o->o_next)
if (o->o_sym == &s_signal) n++;
return (n);
}
int obj_sigoutletindex(t_object *x, int m)
{
int n;
t_outlet *o2;
for (o2 = x->ob_outlet, n = 0; o2; o2 = o2->o_next, m--)
if (o2->o_sym == &s_signal)
{
if (m == 0) return (n);
n++;
}
return (-1);
}
int obj_issignaloutlet(t_object *x, int m)
{
int n;
t_outlet *o2;
for (o2 = x->ob_outlet, n = 0; o2 && m--; o2 = o2->o_next);
return (o2 && (o2->o_sym == &s_signal));
}
t_sample *obj_findsignalscalar(t_object *x, int m)
{
int n = 0;
t_inlet *i;
if (x->ob_pd->c_firstin && x->ob_pd->c_floatsignalin)
{
if (!m--)
return (x->ob_pd->c_floatsignalin > 0 ?
(t_sample *)(((char *)x) + x->ob_pd->c_floatsignalin) : 0);
n++;
}
for (i = x->ob_inlet; i; i = i->i_next, m--)
if (i->i_symfrom == &s_signal)
{
if (m == 0)
return (&i->i_un.iu_floatsignalvalue);
n++;
}
return (0);
}
/* and these are only used in g_io.c... */
int inlet_getsignalindex(t_inlet *x)
{
int n = 0;
t_inlet *i;
for (i = x->i_owner->ob_inlet, n = 0; i && i != x; i = i->i_next)
if (i->i_symfrom == &s_signal) n++;
return (n);
}
int outlet_getsignalindex(t_outlet *x)
{
int n = 0;
t_outlet *o;
for (o = x->o_owner->ob_outlet, n = 0; o && o != x; o = o->o_next)
if (o->o_sym == &s_signal) n++;
return (n);
}
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/*
* parse.c
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This file is part of a52dec, a free ATSC A-52 stream decoder.
* See http://liba52.sourceforge.net/ for updates.
*
* a52dec 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.
*
* a52dec 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
*/
#include "config-a52.h"
#include <string.h>
#include <inttypes.h>
#include "a52.h"
#include "a52_internal.h"
#include "bitstream.h"
#include "tables.h"
#if defined(HAVE_MEMALIGN) && !defined(__cplusplus)
/* some systems have memalign() but no declaration for it */
void * memalign (size_t align, size_t size);
#else
/* assume malloc alignment is sufficient */
#define memalign(align,size) malloc (size)
#endif
typedef struct {
quantizer_t q1[2];
quantizer_t q2[2];
quantizer_t q4;
int q1_ptr;
int q2_ptr;
int q4_ptr;
} quantizer_set_t;
static a52_state_t istate IBSS_ATTR;
static sample_t isamples[256*12] IBSS_ATTR;
static uint8_t halfrate[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3};
a52_state_t * a52_init (uint32_t mm_accel)
{
a52_state_t * state;
int i;
#if defined(CPU_COLDFIRE)
coldfire_set_macsr(EMAC_FRACTIONAL | EMAC_ROUND | EMAC_SATURATE);
#endif
/*
this needs to come back if we ever want two decoder instances
simultenously. NOTE, you also need to remove comments in a52_free.
state = (a52_state_t *) malloc (sizeof (a52_state_t));
if (state == NULL)
return NULL;
state->samples = (sample_t *) memalign (16, 256 * 12 * sizeof (sample_t));
if (state->samples == NULL) {
free (state);
return NULL;
}
*/
state = &istate;
state->samples = isamples;
for (i = 0; i < 256 * 12; i++)
state->samples[i] = 0;
state->downmixed = 1;
state->lfsr_state = 1;
a52_imdct_init (mm_accel);
return state;
}
sample_t * a52_samples (a52_state_t * state)
{
return state->samples;
}
int a52_syncinfo (uint8_t * buf, int * flags,
int * sample_rate, int * bit_rate)
{
static int rate[] = { 32, 40, 48, 56, 64, 80, 96, 112,
128, 160, 192, 224, 256, 320, 384, 448,
512, 576, 640};
static uint8_t lfeon[8] = {0x10, 0x10, 0x04, 0x04, 0x04, 0x01, 0x04, 0x01};
int frmsizecod;
int bitrate;
int half;
int acmod;
if ((buf[0] != 0x0b) || (buf[1] != 0x77)) /* syncword */
return 0;
if (buf[5] >= 0x60) /* bsid >= 12 */
return 0;
half = halfrate[buf[5] >> 3];
/* acmod, dsurmod and lfeon */
acmod = buf[6] >> 5;
*flags = ((((buf[6] & 0xf8) == 0x50) ? A52_DOLBY : acmod) |
((buf[6] & lfeon[acmod]) ? A52_LFE : 0));
frmsizecod = buf[4] & 63;
if (frmsizecod >= 38)
return 0;
bitrate = rate [frmsizecod >> 1];
*bit_rate = (bitrate * 1000) >> half;
switch (buf[4] & 0xc0) {
case 0:
*sample_rate = 48000 >> half;
return 4 * bitrate;
case 0x40:
*sample_rate = 44100 >> half;
return 2 * (320 * bitrate / 147 + (frmsizecod & 1));
case 0x80:
*sample_rate = 32000 >> half;
return 6 * bitrate;
default:
return 0;
}
}
int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
level_t * level, sample_t bias)
{
static level_t clev[4] = { LEVEL (LEVEL_3DB), LEVEL (LEVEL_45DB),
LEVEL (LEVEL_6DB), LEVEL (LEVEL_45DB) };
static level_t slev[4] = { LEVEL (LEVEL_3DB), LEVEL (LEVEL_6DB),
0, LEVEL (LEVEL_6DB) };
int chaninfo;
int acmod;
state->fscod = buf[4] >> 6;
state->halfrate = halfrate[buf[5] >> 3];
state->acmod = acmod = buf[6] >> 5;
a52_bitstream_set_ptr (state, buf + 6);
bitstream_get (state, 3); /* skip acmod we already parsed */
if ((acmod == 2) && (bitstream_get (state, 2) == 2)) /* dsurmod */
acmod = A52_DOLBY;
state->clev = state->slev = 0;
if ((acmod & 1) && (acmod != 1))
state->clev = clev[bitstream_get (state, 2)]; /* cmixlev */
if (acmod & 4)
state->slev = slev[bitstream_get (state, 2)]; /* surmixlev */
state->lfeon = bitstream_get (state, 1);
state->output = a52_downmix_init (acmod, *flags, level,
state->clev, state->slev);
if (state->output < 0)
return 1;
if (state->lfeon && (*flags & A52_LFE))
state->output |= A52_LFE;
*flags = state->output;
/* the 2* compensates for differences in imdct */
state->dynrng = state->level = MUL_C (*level, 2);
state->bias = bias;
state->dynrnge = 1;
state->dynrngcall = NULL;
state->cplba.deltbae = DELTA_BIT_NONE;
state->ba[0].deltbae = state->ba[1].deltbae = state->ba[2].deltbae =
state->ba[3].deltbae = state->ba[4].deltbae = DELTA_BIT_NONE;
chaninfo = !acmod;
do {
bitstream_get (state, 5); /* dialnorm */
if (bitstream_get (state, 1)) /* compre */
bitstream_get (state, 8); /* compr */
if (bitstream_get (state, 1)) /* langcode */
bitstream_get (state, 8); /* langcod */
if (bitstream_get (state, 1)) /* audprodie */
bitstream_get (state, 7); /* mixlevel + roomtyp */
} while (chaninfo--);
bitstream_get (state, 2); /* copyrightb + origbs */
if (bitstream_get (state, 1)) /* timecod1e */
bitstream_get (state, 14); /* timecod1 */
if (bitstream_get (state, 1)) /* timecod2e */
bitstream_get (state, 14); /* timecod2 */
if (bitstream_get (state, 1)) { /* addbsie */
int addbsil;
addbsil = bitstream_get (state, 6);
do {
bitstream_get (state, 8); /* addbsi */
} while (addbsil--);
}
return 0;
}
void a52_dynrng (a52_state_t * state,
level_t (* call) (level_t, void *), void * data)
{
state->dynrnge = 0;
if (call) {
state->dynrnge = 1;
state->dynrngcall = call;
state->dynrngdata = data;
}
}
static int parse_exponents (a52_state_t * state, int expstr, int ngrps,
uint8_t exponent, uint8_t * dest)
{
int exps;
while (ngrps--) {
exps = bitstream_get (state, 7);
exponent += exp_1[exps];
if (exponent > 24)
return 1;
switch (expstr) {
case EXP_D45:
*(dest++) = exponent;
*(dest++) = exponent;
case EXP_D25:
*(dest++) = exponent;
case EXP_D15:
*(dest++) = exponent;
}
exponent += exp_2[exps];
if (exponent > 24)
return 1;
switch (expstr) {
case EXP_D45:
*(dest++) = exponent;
*(dest++) = exponent;
case EXP_D25:
*(dest++) = exponent;
case EXP_D15:
*(dest++) = exponent;
}
exponent += exp_3[exps];
if (exponent > 24)
return 1;
switch (expstr) {
case EXP_D45:
*(dest++) = exponent;
*(dest++) = exponent;
case EXP_D25:
*(dest++) = exponent;
case EXP_D15:
*(dest++) = exponent;
}
}
return 0;
}
static int parse_deltba (a52_state_t * state, int8_t * deltba)
{
int deltnseg, deltlen, delta, j;
memset (deltba, 0, 50);
deltnseg = bitstream_get (state, 3);
j = 0;
do {
j += bitstream_get (state, 5);
deltlen = bitstream_get (state, 4);
delta = bitstream_get (state, 3);
delta -= (delta >= 4) ? 3 : 4;
if (!deltlen)
continue;
if (j + deltlen >= 50)
return 1;
while (deltlen--)
deltba[j++] = delta;
} while (deltnseg--);
return 0;
}
static inline int zero_snr_offsets (int nfchans, a52_state_t * state)
{
int i;
if ((state->csnroffst) ||
(state->chincpl && state->cplba.bai >> 3) || /* cplinu, fsnroffst */
(state->lfeon && state->lfeba.bai >> 3)) /* fsnroffst */
return 0;
for (i = 0; i < nfchans; i++)
if (state->ba[i].bai >> 3) /* fsnroffst */
return 0;
return 1;
}
static inline int16_t dither_gen (a52_state_t * state)
{
int16_t nstate;
nstate = dither_lut[state->lfsr_state >> 8] ^ (state->lfsr_state << 8);
state->lfsr_state = (uint16_t) nstate;
return (3 * nstate) >> 2;
}
#ifndef LIBA52_FIXED
#define COEFF(c,t,l,s,e) (c) = (t) * (s)[e]
#else
#define COEFF(c,_t,_l,s,e) do { \
quantizer_t t = (_t); \
level_t l = (_l); \
int shift = e - 5; \
sample_t tmp = t * (l >> 16) + ((t * (l & 0xffff)) >> 16); \
if (shift >= 0) \
(c) = tmp >> shift; \
else \
(c) = tmp << -shift; \
} while (0)
#endif
static void coeff_get (a52_state_t * state, sample_t * coeff,
expbap_t * expbap, quantizer_set_t * quant,
level_t level, int dither, int end)
{
int i;
uint8_t * exp;
int8_t * bap;
#ifndef LIBA52_FIXED
sample_t factor[25];
for (i = 0; i <= 24; i++)
factor[i] = scale_factor[i] * level;
#endif
exp = expbap->exp;
bap = expbap->bap;
for (i = 0; i < end; i++) {
int bapi;
bapi = bap[i];
switch (bapi) {
case 0:
if (dither) {
COEFF (coeff[i], dither_gen (state), level, factor, exp[i]);
continue;
} else {
coeff[i] = 0;
continue;
}
case -1:
if (quant->q1_ptr >= 0) {
COEFF (coeff[i], quant->q1[quant->q1_ptr--], level,
factor, exp[i]);
continue;
} else {
int code;
code = bitstream_get (state, 5);
quant->q1_ptr = 1;
quant->q1[0] = q_1_2[code];
quant->q1[1] = q_1_1[code];
COEFF (coeff[i], q_1_0[code], level, factor, exp[i]);
continue;
}
case -2:
if (quant->q2_ptr >= 0) {
COEFF (coeff[i], quant->q2[quant->q2_ptr--], level,
factor, exp[i]);
continue;
} else {
int code;
code = bitstream_get (state, 7);
quant->q2_ptr = 1;
quant->q2[0] = q_2_2[code];
quant->q2[1] = q_2_1[code];
COEFF (coeff[i], q_2_0[code], level, factor, exp[i]);
continue;
}
case 3:
COEFF (coeff[i], q_3[bitstream_get (state, 3)], level,
factor, exp[i]);
continue;
case -3:
if (quant->q4_ptr == 0) {
quant->q4_ptr = -1;
COEFF (coeff[i], quant->q4, level, factor, exp[i]);
continue;
} else {
int code;
code = bitstream_get (state, 7);
quant->q4_ptr = 0;
quant->q4 = q_4_1[code];
COEFF (coeff[i], q_4_0[code], level, factor, exp[i]);
continue;
}
case 4:
COEFF (coeff[i], q_5[bitstream_get (state, 4)], level,
factor, exp[i]);
continue;
default:
COEFF (coeff[i], bitstream_get_2 (state, bapi) << (16 - bapi),
level, factor, exp[i]);
}
}
}
static void coeff_get_coupling (a52_state_t * state, int nfchans,
level_t * coeff, sample_t (* samples)[256],
quantizer_set_t * quant, uint8_t dithflag[5])
{
int cplbndstrc, bnd, i, i_end, ch;
uint8_t * exp;
int8_t * bap;
level_t cplco[5];
exp = state->cpl_expbap.exp;
bap = state->cpl_expbap.bap;
bnd = 0;
cplbndstrc = state->cplbndstrc;
i = state->cplstrtmant;
while (i < state->cplendmant) {
i_end = i + 12;
while (cplbndstrc & 1) {
cplbndstrc >>= 1;
i_end += 12;
}
cplbndstrc >>= 1;
for (ch = 0; ch < nfchans; ch++)
cplco[ch] = MUL_L (state->cplco[ch][bnd], coeff[ch]);
bnd++;
while (i < i_end) {
quantizer_t cplcoeff;
int bapi;
bapi = bap[i];
switch (bapi) {
case 0:
for (ch = 0; ch < nfchans; ch++)
if ((state->chincpl >> ch) & 1) {
if (dithflag[ch])
#ifndef LIBA52_FIXED
samples[ch][i] = (scale_factor[exp[i]] *
cplco[ch] * dither_gen (state));
#else
COEFF (samples[ch][i], dither_gen (state),
cplco[ch], scale_factor, exp[i]);
#endif
else
samples[ch][i] = 0;
}
i++;
continue;
case -1:
if (quant->q1_ptr >= 0) {
cplcoeff = quant->q1[quant->q1_ptr--];
break;
} else {
int code;
code = bitstream_get (state, 5);
quant->q1_ptr = 1;
quant->q1[0] = q_1_2[code];
quant->q1[1] = q_1_1[code];
cplcoeff = q_1_0[code];
break;
}
case -2:
if (quant->q2_ptr >= 0) {
cplcoeff = quant->q2[quant->q2_ptr--];
break;
} else {
int code;
code = bitstream_get (state, 7);
quant->q2_ptr = 1;
quant->q2[0] = q_2_2[code];
quant->q2[1] = q_2_1[code];
cplcoeff = q_2_0[code];
break;
}
case 3:
cplcoeff = q_3[bitstream_get (state, 3)];
break;
case -3:
if (quant->q4_ptr == 0) {
quant->q4_ptr = -1;
cplcoeff = quant->q4;
break;
} else {
int code;
code = bitstream_get (state, 7);
quant->q4_ptr = 0;
quant->q4 = q_4_1[code];
cplcoeff = q_4_0[code];
break;
}
case 4:
cplcoeff = q_5[bitstream_get (state, 4)];
break;
default:
cplcoeff = bitstream_get_2 (state, bapi) << (16 - bapi);
}
#ifndef LIBA52_FIXED
cplcoeff *= scale_factor[exp[i]];
#endif
for (ch = 0; ch < nfchans; ch++)
if ((state->chincpl >> ch) & 1)
#ifndef LIBA52_FIXED
samples[ch][i] = cplcoeff * cplco[ch];
#else
COEFF (samples[ch][i], cplcoeff, cplco[ch],
scale_factor, exp[i]);
#endif
i++;
}
}
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