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Move scale_bias to a more sane place. I am starting to wonder how this

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trash got into svn ...

Originally committed as revision 12856 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-04-16 15:28:11 +00:00
parent 687550d35e
commit 5d32325a7b
1 changed files with 5 additions and 5 deletions
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10
libavcodec/nellymoserdec.c
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@ -96,7 +96,7 @@ typedef struct NellyMoserDecodeContext {
AVRandomState random_state; AVRandomState random_state;
GetBitContext gb; GetBitContext gb;
int add_bias; int add_bias;
int scale_bias; float scale_bias;
DSPContext dsp; DSPContext dsp;
MDCTContext imdct_ctx; MDCTContext imdct_ctx;
DECLARE_ALIGNED_16(float,imdct_tmp[NELLY_BUF_LEN]); DECLARE_ALIGNED_16(float,imdct_tmp[NELLY_BUF_LEN]);
@ -120,7 +120,7 @@ static void overlap_and_window(NellyMoserDecodeContext *s, float *state, float *
top = NELLY_BUF_LEN-1; top = NELLY_BUF_LEN-1;
while (bot < NELLY_BUF_LEN) { while (bot < NELLY_BUF_LEN) {
audio[bot] = ( a_in[bot]*sine_window[bot]+state[bot]*sine_window[top])/s->scale_bias + s->add_bias; audio[bot] = a_in[bot]*sine_window[bot]+state[bot]*sine_window[top] + s->add_bias;
bot++; bot++;
top--; top--;
@ -279,7 +279,7 @@ void nelly_decode_block(NellyMoserDecodeContext *s, const unsigned char block[NE
for (i=0 ; i<NELLY_BANDS ; i++) { for (i=0 ; i<NELLY_BANDS ; i++) {
if (i > 0) if (i > 0)
val += nelly_delta_table[get_bits(&s->gb, 5)]; val += nelly_delta_table[get_bits(&s->gb, 5)];
pval = pow(2, val/2048); pval = pow(2, val/2048) * s->scale_bias;
for (j = 0; j < nelly_band_sizes_table[i]; j++) { for (j = 0; j < nelly_band_sizes_table[i]; j++) {
*bptr++ = val; *bptr++ = val;
*pptr++ = pval; *pptr++ = pval;
@ -328,10 +328,10 @@ static av_cold int decode_init(AVCodecContext * avctx) {
if(s->dsp.float_to_int16 == ff_float_to_int16_c) { if(s->dsp.float_to_int16 == ff_float_to_int16_c) {
s->add_bias = 385; s->add_bias = 385;
s->scale_bias = 8*32768; s->scale_bias = 1.0/(8*32768);
} else { } else {
s->add_bias = 0; s->add_bias = 0;
s->scale_bias = 1*8; s->scale_bias = 1.0/(1*8);
} }
/* Generate overlap window */ /* Generate overlap window */