1 files changed, 416 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libtremor/mapping0.c b/lib/rbcodec/codecs/libtremor/mapping0.c
new file mode 100644
index 0000000000..084d5e076d
--- /dev/null
+++ b/lib/rbcodec/codecs/libtremor/mapping0.c
@@ -0,0 +1,416 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
+ *                                                                  *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
+ * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: channel mapping 0 implementation
+
+ ********************************************************************/
+
+#include "config-tremor.h"
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "ogg.h"
+#include "ivorbiscodec.h"
+#include "codeclib.h"
+#include "codec_internal.h"
+#include "codebook.h"
+#include "window.h"
+#include "registry.h"
+#include "misc.h"
+#include <codecs/lib/codeclib.h>
+
+/* simplistic, wasteful way of doing this (unique lookup for each
+   mode/submapping); there should be a central repository for
+   identical lookups.  That will require minor work, so I'm putting it
+   off as low priority.
+
+   Why a lookup for each backend in a given mode?  Because the
+   blocksize is set by the mode, and low backend lookups may require
+   parameters from other areas of the mode/mapping */
+
+typedef struct {
+  vorbis_info_mode *mode;
+  vorbis_info_mapping0 *map;
+
+  vorbis_look_floor **floor_look;
+
+  vorbis_look_residue **residue_look;
+
+  vorbis_func_floor **floor_func;
+  vorbis_func_residue **residue_func;
+
+  int ch;
+  long lastframe; /* if a different mode is called, we need to 
+                     invalidate decay */
+} vorbis_look_mapping0;
+
+static void mapping0_free_info(vorbis_info_mapping *i){
+  vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
+  if(info){
+    memset(info,0,sizeof(*info));
+    _ogg_free(info);
+  }
+}
+
+static void mapping0_free_look(vorbis_look_mapping *look){
+  int i;
+  vorbis_look_mapping0 *l=(vorbis_look_mapping0 *)look;
+  if(l){
+
+    for(i=0;i<l->map->submaps;i++){
+      l->floor_func[i]->free_look(l->floor_look[i]);
+      l->residue_func[i]->free_look(l->residue_look[i]);
+    }
+
+    _ogg_free(l->floor_func);
+    _ogg_free(l->residue_func);
+    _ogg_free(l->floor_look);
+    _ogg_free(l->residue_look);
+    memset(l,0,sizeof(*l));
+    _ogg_free(l);
+  }
+}
+
+static vorbis_look_mapping *mapping0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
+                          vorbis_info_mapping *m){
+  int i;
+  vorbis_info          *vi=vd->vi;
+  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
+  vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)_ogg_calloc(1,sizeof(*look));
+  vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
+  look->mode=vm;
+  
+  look->floor_look=(vorbis_look_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_look));
+
+  look->residue_look=(vorbis_look_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_look));
+
+  look->floor_func=(vorbis_func_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_func));
+  look->residue_func=(vorbis_func_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_func));
+  
+  for(i=0;i<info->submaps;i++){
+    int floornum=info->floorsubmap[i];
+    int resnum=info->residuesubmap[i];
+
+    look->floor_func[i]=_floor_P[ci->floor_type[floornum]];
+    look->floor_look[i]=look->floor_func[i]->
+      look(vd,vm,ci->floor_param[floornum]);
+    look->residue_func[i]=_residue_P[ci->residue_type[resnum]];
+    look->residue_look[i]=look->residue_func[i]->
+      look(vd,vm,ci->residue_param[resnum]);
+    
+  }
+
+  look->ch=vi->channels;
+
+  return(look);
+}
+
+static int ilog(unsigned int v){
+  int ret=0;
+  if(v)--v;
+  while(v){
+    ret++;
+    v>>=1;
+  }
+  return(ret);
+}
+
+
+/* also responsible for range checking */
+static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
+  int i,b;
+  vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)_ogg_calloc(1,sizeof(*info));
+  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
+  memset(info,0,sizeof(*info));
+
+  b=oggpack_read(opb,1);
+  if(b<0)goto err_out;
+  if(b){
+    info->submaps=oggpack_read(opb,4)+1;
+    if(info->submaps<=0)goto err_out;
+  }else
+    info->submaps=1;
+
+  b=oggpack_read(opb,1);
+  if(b<0)goto err_out;
+  if(b){
+    info->coupling_steps=oggpack_read(opb,8)+1;
+    if(info->coupling_steps<=0)goto err_out;
+    for(i=0;i<info->coupling_steps;i++){
+      int testM=oggpack_read(opb,ilog(vi->channels));
+      info->coupling_mag[i]=testM;
+      int testA=oggpack_read(opb,ilog(vi->channels));
+      info->coupling_ang[i]=testA;
+
+      if(testM<0 || 
+         testA<0 || 
+         testM==testA || 
+         testM>=vi->channels ||
+         testA>=vi->channels) goto err_out;
+    }
+
+  }
+
+  if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
+    
+  if(info->submaps>1){
+    for(i=0;i<vi->channels;i++){
+      info->chmuxlist[i]=oggpack_read(opb,4);
+      if(info->chmuxlist[i]>=info->submaps || info->chmuxlist[i]<0)goto err_out;
+    }
+  }
+  for(i=0;i<info->submaps;i++){
+    int temp=oggpack_read(opb,8);
+    if(temp>=ci->times)goto err_out;
+    info->floorsubmap[i]=oggpack_read(opb,8);
+    if(info->floorsubmap[i]>=ci->floors || info->floorsubmap[i]<0)goto err_out;
+    info->residuesubmap[i]=oggpack_read(opb,8);
+    if(info->residuesubmap[i]>=ci->residues || info->residuesubmap[i]<0)
+      goto err_out;
+  }
+
+  return info;
+
+ err_out:
+  mapping0_free_info(info);
+  return(NULL);
+}
+
+#ifdef _ARM_ASSEM_
+#define MAGANG( _mag, _ang )\
+{\
+      register int temp;\
+      asm( "mov %[temp], %[ang]\n\t"\
+           "cmp %[mag], #0\n\t"\
+           "rsble %[temp], %[temp], #0\n\t"\
+           "cmp %[ang], #0\n\t"\
+           "subgt %[ang], %[mag], %[temp]\n\t"\
+           "movle %[ang], %[mag]\n\t"\
+           "addle %[mag], %[mag], %[temp]\n\t"\
+           : [mag] "+r" ( ( _mag ) ), [ang] "+r" ( ( _ang ) ), [temp] "=&r" (temp)\
+           :\
+           : "cc" );\
+}
+
+static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, int n)
+{
+    ogg_int32_t * const pcmMend = pcmM + n/2;
+    while(LIKELY(pcmM < pcmMend))
+    {
+      register int M0 asm("r2"),M1 asm("r3"),M2 asm("r4"),M3 asm("r5");
+      register int A0 asm("r6"),A1 asm("r7"),A2 asm("r8"),A3 asm("r9");
+      asm volatile( "ldmia %[pcmM], {%[M0], %[M1], %[M2], %[M3]}\n\t"
+                    "ldmia %[pcmA], {%[A0], %[A1], %[A2], %[A3]}\n\t"
+                    : [M0] "=r" (M0), [M1] "=r" (M1), [M2] "=r" (M2), [M3] "=r" (M3),
+                      [A0] "=r" (A0), [A1] "=r" (A1), [A2] "=r" (A2), [A3] "=r" (A3)
+                    : [pcmM] "r" (pcmM), [pcmA] "r" (pcmA) 
+                    : "memory" );
+      MAGANG( M0, A0 );
+      MAGANG( M1, A1 );
+      MAGANG( M2, A2 );
+      MAGANG( M3, A3 );
+      asm volatile( "stmia %[pcmM]!, {%[M0], %[M1], %[M2], %[M3]}\n\t"
+                    "stmia %[pcmA]!, {%[A0], %[A1], %[A2], %[A3]}\n\t"
+                    : [pcmM] "+r" (pcmM), [pcmA] "+r" (pcmA)
+                    : [M0] "r" (M0), [M1] "r" (M1), [M2] "r" (M2), [M3] "r" (M3),
+                      [A0] "r" (A0), [A1] "r" (A1), [A2] "r" (A2), [A3] "r" (A3) 
+                    : "memory" );
+    }
+}
+
+#elif defined CPU_COLDFIRE
+
+#define MAGANG( _mag, _ang, _off )\
+{\
+    asm volatile( "tst.l %[mag]\n\t"\
+                  "bgt.s 1f\n\t"\
+                  "neg.l %[ang]\n\t" /* neg sets cc so we might as well jump */ \
+                  "ble.s 2f\n\t"\
+                  ".word 0x51fb\n\t" /* trapf.l, shadow next 2 insns */ \
+                                     /* if we didn't jump, the next test will */ \
+                                     /* false anyway */ \
+                  "1:\n\t"\
+                  "tst.l %[ang]\n\t"\
+                  "bgt.s 2f\n\t"\
+                  "add.l %[mag], %[ang]\n\t"\
+                  "move.l %[ang], (" #_off ", %[pcmM])\n\t"\
+                  ".word 0x51fa\n\t" /* trapf.w, shadow next insn */ \
+                  "2:\n\t"\
+                  "sub.l %[ang], %[mag]\n\t"\
+                  "move.l %[mag], (%[pcmA])+\n\t"\
+                  : [mag] "+r" ( ( _mag ) ), [ang] "+d" ( ( _ang ) ),\
+                    [pcmA] "+a" (pcmA)\
+                  : [pcmM] "a" (pcmM)\
+                  : "cc", "memory" );\
+}
+static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, unsigned int n)
+{
+    ogg_int32_t * const pcmMend = pcmM + n/2;
+    while(LIKELY(pcmM < pcmMend))
+    {
+      register int M0 asm("a2"),M1 asm("a3"),M2 asm("a4"),M3 asm("a5");
+      register int A0 asm("d2"),A1 asm("d3"),A2 asm("d4"),A3 asm("d5");
+      asm volatile( "movem.l (%[pcmM]), %[M0]-%[M3]\n\t"
+                    "movem.l (%[pcmA]), %[A0]-%[A3]\n\t"
+                    : [M0] "=r" (M0), [M1] "=r" (M1), [M2] "=r" (M2), [M3] "=r" (M3),
+                      [A0] "=r" (A0), [A1] "=r" (A1), [A2] "=r" (A2), [A3] "=r" (A3)
+                    : [pcmM] "a" (pcmM), [pcmA] "a" (pcmA) );
+
+      /* use offsets instead of autoinc since the store to pcmM is conditional */
+      MAGANG( M0, A0, 0 );
+      MAGANG( M1, A1, 4 );
+      MAGANG( M2, A2, 8 );
+      MAGANG( M3, A3, 12 );
+
+      asm volatile( "lea.l (4*4, %[pcmM]), %[pcmM]\n\t"
+                    : [pcmM] "+a" (pcmM));
+    }
+}
+#else
+static inline void channel_couple(ogg_int32_t *pcmM, ogg_int32_t *pcmA, int n)
+{
+    int j;
+    for(j=0;j<n/2;j++){
+      ogg_int32_t mag = pcmM[j], ang = pcmA[j], _ang;
+        if(mag>0)
+          _ang = ang;
+        else
+          _ang = -ang;
+
+        if(ang>0)
+          pcmA[j]=mag-_ang;
+        else{
+          pcmA[j]=mag;
+          pcmM[j]=mag+_ang;
+        }
+
+    }
+}
+#endif
+
+static int mapping0_inverse(vorbis_block *vb,vorbis_look_mapping *l){
+  vorbis_dsp_state     *vd=vb->vd;
+  vorbis_info          *vi=vd->vi;
+  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
+  vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
+  vorbis_info_mapping0 *info=look->map;
+
+  int                   i,j;
+  long                  n=vb->pcmend=ci->blocksizes[vb->W];
+
+  /* bounded mapping arrays instead of using alloca();
+     avoids memory leak; we can only deal with stereo anyway */
+  ogg_int32_t *pcmbundle[CHANNELS];
+  int   zerobundle[CHANNELS];
+  int   nonzero[CHANNELS];
+  void *floormemo[CHANNELS];
+
+  /* time domain information decode (note that applying the
+     information would have to happen later; we'll probably add a
+     function entry to the harness for that later */
+  /* NOT IMPLEMENTED */
+
+  /* recover the spectral envelope; store it in the PCM vector for now */
+  for(i=0;i<vi->channels;i++){
+    int submap=info->chmuxlist[i];
+    floormemo[i]=look->floor_func[submap]->
+      inverse1(vb,look->floor_look[submap]);
+    if(floormemo[i])
+      nonzero[i]=1;
+    else
+      nonzero[i]=0;
+    memset(vd->floors + i * ci->blocksizes[vb->W]/2,0,sizeof(ogg_int32_t)*n/2);
+  }
+
+  /* channel coupling can 'dirty' the nonzero listing */
+  for(i=0;i<info->coupling_steps;i++){
+    if(nonzero[info->coupling_mag[i]] ||
+       nonzero[info->coupling_ang[i]]){
+      nonzero[info->coupling_mag[i]]=1; 
+      nonzero[info->coupling_ang[i]]=1; 
+    }
+  }
+
+  /* recover the residue into our working vectors */
+  for(i=0;i<info->submaps;i++){
+    int ch_in_bundle=0;
+    for(j=0;j<vi->channels;j++){
+      if(info->chmuxlist[j]==i){
+        if(nonzero[j])
+          zerobundle[ch_in_bundle]=1;
+        else
+          zerobundle[ch_in_bundle]=0;
+        pcmbundle[ch_in_bundle++] = vd->floors + j * ci->blocksizes[vb->W]/2;
+      }
+    }
+
+    look->residue_func[i]->inverse(vb,look->residue_look[i],
+                                   pcmbundle,zerobundle,ch_in_bundle);
+  }
+
+  //for(j=0;j<vi->channels;j++)
+  //_analysis_output("coupled",seq+j,vb->pcm[j],-8,n/2,0,0);
+
+
+  /* channel coupling */
+  for(i=info->coupling_steps-1;i>=0;i--){
+    ogg_int32_t *pcmM = vd->floors + info->coupling_mag[i] * ci->blocksizes[vb->W]/2;
+    ogg_int32_t *pcmA = vd->floors + info->coupling_ang[i] * ci->blocksizes[vb->W]/2;
+    channel_couple(pcmM,pcmA,n);
+  }
+
+  //for(j=0;j<vi->channels;j++)
+  //_analysis_output("residue",seq+j,vb->pcm[j],-8,n/2,0,0);
+
+  //for(j=0;j<vi->channels;j++)
+  //_analysis_output("mdct",seq+j,vb->pcm[j],-24,n/2,0,1);
+
+  /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
+  /* only MDCT right now.... */
+  for(i=0;i<vi->channels;i++){
+    ogg_int32_t *pcm = vd->floors + i*ci->blocksizes[vb->W]/2;
+    int submap=info->chmuxlist[i];
+    
+    if(nonzero[i]) {
+      /* compute and apply spectral envelope */
+      look->floor_func[submap]->
+        inverse2(vb,look->floor_look[submap],floormemo[i],pcm);
+
+      ff_imdct_half(ci->blocksizes_nbits[vb->W],
+                    (int32_t*)vd->residues[vd->ri] + i*ci->blocksizes[vb->W]/2,
+                    (int32_t*)&vd->floors[i*ci->blocksizes[vb->W]/2]);
+    }
+    else
+      memset(vd->residues[vd->ri] + i*ci->blocksizes[vb->W]/2, 0, sizeof(ogg_int32_t)*n/2);
+  }
+
+  //for(j=0;j<vi->channels;j++)
+  //_analysis_output("imdct",seq+j,vb->pcm[j],-24,n,0,0);
+
+  //for(j=0;j<vi->channels;j++)
+  //_analysis_output("window",seq+j,vb->pcm[j],-24,n,0,0);
+
+  //seq+=vi->channels;
+  /* all done! */
+  return(0);
+}
+
+/* export hooks */
+const vorbis_func_mapping mapping0_exportbundle ICONST_ATTR ={
+  &mapping0_unpack,
+  &mapping0_look,
+  &mapping0_free_info,
+  &mapping0_free_look,
+  &mapping0_inverse
+};
+