Revision 756e3467
| libavcodec/ra144.c | ||
|---|---|---|
| 21 | 21 |
|
| 22 | 22 |
#include <stdint.h> |
| 23 | 23 |
#include "avcodec.h" |
| 24 |
#include "celp_filters.h" |
|
| 24 | 25 |
#include "ra144.h" |
| 25 | 26 |
|
| 26 | 27 |
const int16_t ff_gain_val_tab[256][3] = {
|
| ... | ... | |
| 1684 | 1685 |
|
| 1685 | 1686 |
return 0x20000000 / (ff_t_sqrt(sum) >> 8); |
| 1686 | 1687 |
} |
| 1688 |
|
|
| 1689 |
void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs, |
|
| 1690 |
int cba_idx, int cb1_idx, int cb2_idx, |
|
| 1691 |
int gval, int gain) |
|
| 1692 |
{
|
|
| 1693 |
uint16_t buffer_a[40]; |
|
| 1694 |
uint16_t *block; |
|
| 1695 |
int m[3]; |
|
| 1696 |
|
|
| 1697 |
if (cba_idx) {
|
|
| 1698 |
cba_idx += BLOCKSIZE/2 - 1; |
|
| 1699 |
ff_copy_and_dup(buffer_a, ractx->adapt_cb, cba_idx); |
|
| 1700 |
m[0] = (ff_irms(buffer_a) * gval) >> 12; |
|
| 1701 |
} else {
|
|
| 1702 |
m[0] = 0; |
|
| 1703 |
} |
|
| 1704 |
m[1] = (ff_cb1_base[cb1_idx] * gval) >> 8; |
|
| 1705 |
m[2] = (ff_cb2_base[cb2_idx] * gval) >> 8; |
|
| 1706 |
memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE, |
|
| 1707 |
(BUFFERSIZE - BLOCKSIZE) * sizeof(*ractx->adapt_cb)); |
|
| 1708 |
|
|
| 1709 |
block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE; |
|
| 1710 |
|
|
| 1711 |
ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL, |
|
| 1712 |
ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]); |
|
| 1713 |
|
|
| 1714 |
memcpy(ractx->curr_sblock, ractx->curr_sblock + 40, |
|
| 1715 |
10*sizeof(*ractx->curr_sblock)); |
|
| 1716 |
|
|
| 1717 |
if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs, |
|
| 1718 |
block, BLOCKSIZE, 10, 1, 0xfff)) |
|
| 1719 |
memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock)); |
|
| 1720 |
} |
|
| libavcodec/ra144.h | ||
|---|---|---|
| 61 | 61 |
int energy); |
| 62 | 62 |
unsigned int ff_rescale_rms(unsigned int rms, unsigned int energy); |
| 63 | 63 |
int ff_irms(const int16_t *data); |
| 64 |
void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs, |
|
| 65 |
int cba_idx, int cb1_idx, int cb2_idx, |
|
| 66 |
int gval, int gain); |
|
| 64 | 67 |
|
| 65 | 68 |
extern const int16_t ff_gain_val_tab[256][3]; |
| 66 | 69 |
extern const uint8_t ff_gain_exp_tab[256]; |
| libavcodec/ra144dec.c | ||
|---|---|---|
| 26 | 26 |
#include "avcodec.h" |
| 27 | 27 |
#include "get_bits.h" |
| 28 | 28 |
#include "ra144.h" |
| 29 |
#include "celp_filters.h" |
|
| 30 | 29 |
|
| 31 | 30 |
|
| 32 | 31 |
static av_cold int ra144_decode_init(AVCodecContext * avctx) |
| ... | ... | |
| 45 | 44 |
static void do_output_subblock(RA144Context *ractx, const uint16_t *lpc_coefs, |
| 46 | 45 |
int gval, GetBitContext *gb) |
| 47 | 46 |
{
|
| 48 |
uint16_t buffer_a[40]; |
|
| 49 |
uint16_t *block; |
|
| 50 | 47 |
int cba_idx = get_bits(gb, 7); // index of the adaptive CB, 0 if none |
| 51 | 48 |
int gain = get_bits(gb, 8); |
| 52 | 49 |
int cb1_idx = get_bits(gb, 7); |
| 53 | 50 |
int cb2_idx = get_bits(gb, 7); |
| 54 |
int m[3]; |
|
| 55 |
|
|
| 56 |
if (cba_idx) {
|
|
| 57 |
cba_idx += BLOCKSIZE/2 - 1; |
|
| 58 |
ff_copy_and_dup(buffer_a, ractx->adapt_cb, cba_idx); |
|
| 59 |
m[0] = (ff_irms(buffer_a) * gval) >> 12; |
|
| 60 |
} else {
|
|
| 61 |
m[0] = 0; |
|
| 62 |
} |
|
| 63 |
|
|
| 64 |
m[1] = (ff_cb1_base[cb1_idx] * gval) >> 8; |
|
| 65 |
m[2] = (ff_cb2_base[cb2_idx] * gval) >> 8; |
|
| 66 |
|
|
| 67 |
memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE, |
|
| 68 |
(BUFFERSIZE - BLOCKSIZE) * sizeof(*ractx->adapt_cb)); |
|
| 69 |
|
|
| 70 |
block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE; |
|
| 71 |
|
|
| 72 |
ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL, |
|
| 73 |
ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]); |
|
| 74 |
|
|
| 75 |
memcpy(ractx->curr_sblock, ractx->curr_sblock + 40, |
|
| 76 |
10*sizeof(*ractx->curr_sblock)); |
|
| 77 | 51 |
|
| 78 |
if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs, |
|
| 79 |
block, BLOCKSIZE, 10, 1, 0xfff)) |
|
| 80 |
memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock)); |
|
| 52 |
ff_subblock_synthesis(ractx, lpc_coefs, cba_idx, cb1_idx, cb2_idx, gval, |
|
| 53 |
gain); |
|
| 81 | 54 |
} |
| 82 | 55 |
|
| 83 | 56 |
/** Uncompress one block (20 bytes -> 160*2 bytes). */ |
Also available in: Unified diff