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Code Issues Releases Activity

Split do_output_subblock() into common code and decoder specific parts

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Patch by Francesco Lavra (firstnamelastname@interfree.it)

Originally committed as revision 23576 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Francesco Lavra 2010-06-11 08:05:17 +00:00 committed by Vitor Sessak
parent 5ec29beeb4
commit 756e346798
3 changed files with 39 additions and 29 deletions
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34
libavcodec/ra144.c
View File

@ -21,6 +21,7 @@
#include <stdint.h>
#include "avcodec.h"
#include "celp_filters.h"
#include "ra144.h"
const int16_t ff_gain_val_tab[256][3] = {
@ -1684,3 +1685,36 @@ int ff_irms(const int16_t *data)
return 0x20000000 / (ff_t_sqrt(sum) >> 8);
}
void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs,
int cba_idx, int cb1_idx, int cb2_idx,
int gval, int gain)
{
uint16_t buffer_a[40];
uint16_t *block;
int m[3];
if (cba_idx) {
cba_idx += BLOCKSIZE/2 - 1;
ff_copy_and_dup(buffer_a, ractx->adapt_cb, cba_idx);
m[0] = (ff_irms(buffer_a) * gval) >> 12;
} else {
m[0] = 0;
}
m[1] = (ff_cb1_base[cb1_idx] * gval) >> 8;
m[2] = (ff_cb2_base[cb2_idx] * gval) >> 8;
memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE,
(BUFFERSIZE - BLOCKSIZE) * sizeof(*ractx->adapt_cb));
block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE;
ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL,
ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]);
memcpy(ractx->curr_sblock, ractx->curr_sblock + 40,
10*sizeof(*ractx->curr_sblock));
if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs,
block, BLOCKSIZE, 10, 1, 0xfff))
memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock));
}

3
libavcodec/ra144.h
View File

@ -61,6 +61,9 @@ int ff_interp(RA144Context *ractx, int16_t *out, int a, int copyold,
int energy);
unsigned int ff_rescale_rms(unsigned int rms, unsigned int energy);
int ff_irms(const int16_t *data);
void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs,
int cba_idx, int cb1_idx, int cb2_idx,
int gval, int gain);
extern const int16_t ff_gain_val_tab[256][3];
extern const uint8_t ff_gain_exp_tab[256];

31
libavcodec/ra144dec.c
View File

@ -26,7 +26,6 @@
#include "avcodec.h"
#include "get_bits.h"
#include "ra144.h"
#include "celp_filters.h"
static av_cold int ra144_decode_init(AVCodecContext * avctx)
@ -45,39 +44,13 @@ static av_cold int ra144_decode_init(AVCodecContext * avctx)
static void do_output_subblock(RA144Context *ractx, const uint16_t *lpc_coefs,
int gval, GetBitContext *gb)
{
uint16_t buffer_a[40];
uint16_t *block;
int cba_idx = get_bits(gb, 7); // index of the adaptive CB, 0 if none
int gain = get_bits(gb, 8);
int cb1_idx = get_bits(gb, 7);
int cb2_idx = get_bits(gb, 7);
int m[3];
if (cba_idx) {
cba_idx += BLOCKSIZE/2 - 1;
ff_copy_and_dup(buffer_a, ractx->adapt_cb, cba_idx);
m[0] = (ff_irms(buffer_a) * gval) >> 12;
} else {
m[0] = 0;
}
m[1] = (ff_cb1_base[cb1_idx] * gval) >> 8;
m[2] = (ff_cb2_base[cb2_idx] * gval) >> 8;
memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE,
(BUFFERSIZE - BLOCKSIZE) * sizeof(*ractx->adapt_cb));
block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE;
ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL,
ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]);
memcpy(ractx->curr_sblock, ractx->curr_sblock + 40,
10*sizeof(*ractx->curr_sblock));
if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs,
block, BLOCKSIZE, 10, 1, 0xfff))
memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock));
ff_subblock_synthesis(ractx, lpc_coefs, cba_idx, cb1_idx, cb2_idx, gval,
gain);
}
/** Uncompress one block (20 bytes -> 160*2 bytes). */