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Code Issues Releases Activity

Rename var: swapbuf* are LPC related

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Originally committed as revision 13432 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-05-26 18:16:05 +00:00
parent f000bfad3d
commit e037baf797
1 changed files with 18 additions and 18 deletions
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36
libavcodec/ra144.c
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@ -34,11 +34,11 @@ typedef struct {
unsigned int oldval;
/* the swapped buffers */
unsigned int swapbuffers[4][10];
unsigned int *swapbuf1;
unsigned int *swapbuf2;
unsigned int *swapbuf1alt;
unsigned int *swapbuf2alt;
unsigned int lpc_tables[4][10];
unsigned int *lpc_refl; //< LPC reflection coefficients
unsigned int *lpc_coef; //< LPC coefficients
unsigned int *lpc_refl_old; //< previous frame LPC reflection coefs
unsigned int *lpc_coef_old; //< previous frame LPC coefficients
unsigned int buffer[5];
uint16_t adapt_cb[148]; //< Adaptative codebook
@ -48,10 +48,10 @@ static int ra144_decode_init(AVCodecContext * avctx)
{
RA144Context *ractx = avctx->priv_data;
ractx->swapbuf1 = ractx->swapbuffers[0];
ractx->swapbuf2 = ractx->swapbuffers[1];
ractx->swapbuf1alt = ractx->swapbuffers[2];
ractx->swapbuf2alt = ractx->swapbuffers[3];
ractx->lpc_refl = ractx->lpc_tables[0];
ractx->lpc_coef = ractx->lpc_tables[1];
ractx->lpc_refl_old = ractx->lpc_tables[2];
ractx->lpc_coef_old = ractx->lpc_tables[3];
return 0;
}
@ -326,21 +326,21 @@ static int ra144_decode_frame(AVCodecContext * avctx,
for (i=0; i<10; i++)
// "<< 1"? Doesn't this make one value out of two of the table useless?
ractx->swapbuf1[i] = decodetable[i][get_bits(&gb, sizes[i]) << 1];
ractx->lpc_refl[i] = decodetable[i][get_bits(&gb, sizes[i]) << 1];
do_voice(ractx->swapbuf1, ractx->swapbuf2);
do_voice(ractx->lpc_refl, ractx->lpc_coef);
val = decodeval[get_bits(&gb, 5) << 1]; // Useless table entries?
a = t_sqrt(val*ractx->oldval) >> 12;
gbuf1[0] = dec2(gbuf2[0], ractx->swapbuf1alt, ractx->swapbuf2alt, ractx->oldval, ractx->swapbuf2, 3);
gbuf1[0] = dec2(gbuf2[0], ractx->lpc_refl_old, ractx->lpc_coef_old, ractx->oldval, ractx->lpc_coef, 3);
if (ractx->oldval < val) {
gbuf1[1] = dec2(gbuf2[1], ractx->swapbuf1, ractx->swapbuf2, a, ractx->swapbuf2alt, 2);
gbuf1[1] = dec2(gbuf2[1], ractx->lpc_refl, ractx->lpc_coef, a, ractx->lpc_coef_old, 2);
} else {
gbuf1[1] = dec2(gbuf2[1], ractx->swapbuf1alt, ractx->swapbuf2alt, a, ractx->swapbuf2, 2);
gbuf1[1] = dec2(gbuf2[1], ractx->lpc_refl_old, ractx->lpc_coef_old, a, ractx->lpc_coef, 2);
}
gbuf1[2] = dec2(gbuf2[2], ractx->swapbuf1, ractx->swapbuf2, val, ractx->swapbuf2alt, 3);
gbuf1[3] = dec1(gbuf2[3], ractx->swapbuf1, ractx->swapbuf2, val);
gbuf1[2] = dec2(gbuf2[2], ractx->lpc_refl, ractx->lpc_coef, val, ractx->lpc_coef_old, 3);
gbuf1[3] = dec1(gbuf2[3], ractx->lpc_refl, ractx->lpc_coef, val);
/* do output */
for (c=0; c<4; c++) {
@ -354,8 +354,8 @@ static int ra144_decode_frame(AVCodecContext * avctx,
ractx->oldval = val;
FFSWAP(unsigned int *, ractx->swapbuf1alt, ractx->swapbuf1);
FFSWAP(unsigned int *, ractx->swapbuf2alt, ractx->swapbuf2);
FFSWAP(unsigned int *, ractx->lpc_refl_old, ractx->lpc_refl);
FFSWAP(unsigned int *, ractx->lpc_coef_old, ractx->lpc_coef);
*data_size = 2*160;
return 20;