/*int do_layer1(struct frame *fr,int outmode,struct audio_info_struct *ai) */
int do_layer1(PMPSTR mp, unsigned char *pcm_sample,int *pcm_point)
{
int clip=0;
unsigned int balloc[2*SBLIMIT];
unsigned int scale_index[2][SBLIMIT];
real fraction[2][SBLIMIT];
struct frame *fr=&(mp->fr);
int i,stereo = fr->stereo;
int single = fr->single;
fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? (fr->mode_ext<<2)+4 : 32;
if(stereo == 1 || single == 3)
single = 0;
I_step_one(balloc,scale_index,fr);
for (i=0;i<SCALE_BLOCK;i++)
{
I_step_two(fraction,balloc,scale_index,fr);
if(single >= 0)
{
clip += synth_1to1_mono( mp, (real *) fraction[single],pcm_sample,pcm_point);
}
else {
int p1 = *pcm_point;
clip += synth_1to1( mp, (real *) fraction[0],0,pcm_sample,&p1);
clip += synth_1to1( mp, (real *) fraction[1],1,pcm_sample,pcm_point);
}
}
return clip;
}
int
decode_layer2_frame(PMPSTR mp, unsigned char *pcm_sample, int *pcm_point)
{
real fraction[2][4][SBLIMIT]; /* pick_table clears unused subbands */
sideinfo_layer_II si;
struct frame *fr = &(mp->fr);
int single = fr->single;
int i, j, clip = 0;
II_select_table(fr);
II_step_one(mp, &si, fr);
if (fr->stereo == 1 || single == 3)
single = 0;
if (single >= 0) {
for (i = 0; i < SCALE_BLOCK; i++) {
II_step_two(mp, &si, fr, i >> 2, fraction);
for (j = 0; j < 3; j++) {
clip += synth_1to1_mono(mp, fraction[single][j], pcm_sample, pcm_point);
}
}
}
else {
for (i = 0; i < SCALE_BLOCK; i++) {
int
decode_layer1_frame(PMPSTR mp, unsigned char *pcm_sample, int *pcm_point)
{
real fraction[2][SBLIMIT]; /* FIXME: change real -> double ? */
sideinfo_layer_I si;
struct frame *fr = &(mp->fr);
int single = fr->single;
int i, clip = 0;
I_step_one(mp, &si);
if (fr->stereo == 1 || single == 3)
single = 0;
if (single >= 0) {
/* decoding one of possibly two channels */
for (i = 0; i < SCALE_BLOCK; i++) {
I_step_two(mp, &si, fraction);
clip += synth_1to1_mono(mp, (real *) fraction[single], pcm_sample, pcm_point);
}
}
else {
for (i = 0; i < SCALE_BLOCK; i++) {
int p1 = *pcm_point;
I_step_two(mp, &si, fraction);
clip += synth_1to1(mp, (real *) fraction[0], 0, pcm_sample, &p1);
clip += synth_1to1(mp, (real *) fraction[1], 1, pcm_sample, pcm_point);
}
}
return clip;
}
int do_layer2( PMPSTR mp,unsigned char *pcm_sample,int *pcm_point)
//int do_layer2(struct frame *fr,int outmode,struct audio_info_struct *ai)
{
int clip=0;
int i,j;
real fraction[2][4][SBLIMIT]; /* pick_table clears unused subbands */
unsigned int bit_alloc[64];
int scale[192];
struct frame *fr=&(mp->fr);
int stereo = fr->stereo;
int single = fr->single;
II_select_table(fr);
fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ?
(fr->mode_ext<<2)+4 : fr->II_sblimit;
if(stereo == 1 || single == 3)
single = 0;
II_step_one(bit_alloc, scale, fr);
for (i=0; i<SCALE_BLOCK; i++)
{
II_step_two(bit_alloc,fraction,scale,fr,i>>2);
for (j=0; j<3; j++)
{
if(single >= 0)
{
clip += synth_1to1_mono(mp, fraction[single][j],pcm_sample,pcm_point);
}
else {
int p1 = *pcm_point;
clip += synth_1to1(mp, fraction[0][j],0,pcm_sample,&p1);
clip += synth_1to1(mp, fraction[1][j],1,pcm_sample,pcm_point);
}
}
}
return clip;
}
