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ra144: use scalarproduct_int16

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The buffer holding the coefficients must be padded with 0 so as to use DSP
functions that may overread. Currently, the SSE2/3 versions is an example,
as they process batches of 16 bytes.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Christophe Gisquet 2012-03-04 13:28:16 +01:00 committed by Michael Niedermayer
parent dfc99ca04d
commit c3390fd56c
4 changed files with 17 additions and 13 deletions
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14
libavcodec/ra144.c
View File

@ -1681,12 +1681,9 @@ unsigned int ff_rescale_rms(unsigned int rms, unsigned int energy)
}
/** inverse root mean square */
int ff_irms(const int16_t *data)
int ff_irms(DSPContext *dsp, const int16_t *data)
{
unsigned int i, sum = 0;
for (i=0; i < BLOCKSIZE; i++)
sum += data[i] * data[i];
unsigned int sum = dsp->scalarproduct_int16(data, data, BLOCKSIZE);
if (sum == 0)
return 0; /* OOPS - division by zero */
@ -1698,14 +1695,13 @@ void ff_subblock_synthesis(RA144Context *ractx, const int16_t *lpc_coefs,
int cba_idx, int cb1_idx, int cb2_idx,
int gval, int gain)
{
int16_t buffer_a[BLOCKSIZE];
int16_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;
ff_copy_and_dup(ractx->buffer_a, ractx->adapt_cb, cba_idx);
m[0] = (ff_irms(&ractx->dsp, ractx->buffer_a) * gval) >> 12;
} else {
m[0] = 0;
}
@ -1716,7 +1712,7 @@ void ff_subblock_synthesis(RA144Context *ractx, const int16_t *lpc_coefs,
block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE;
add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL,
add_wav(block, gain, cba_idx, m, cba_idx? ractx->buffer_a: NULL,
ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]);
memcpy(ractx->curr_sblock, ractx->curr_sblock + BLOCKSIZE,

6
libavcodec/ra144.h
View File

@ -25,6 +25,7 @@
#include <stdint.h>
#include "lpc.h"
#include "audio_frame_queue.h"
#include "dsputil.h"
#define NBLOCKS 4 ///< number of subblocks within a block
#define BLOCKSIZE 40 ///< subblock size in 16-bit words
@ -35,6 +36,7 @@
typedef struct RA144Context {
AVCodecContext *avctx;
DSPContext dsp;
LPCContext lpc_ctx;
AudioFrameQueue afq;
int last_frame;
@ -57,6 +59,8 @@ typedef struct RA144Context {
/** Adaptive codebook, its size is two units bigger to avoid a
* buffer overflow. */
int16_t adapt_cb[146+2];
DECLARE_ALIGNED(16, int16_t, buffer_a)[FFALIGN(BLOCKSIZE,16)];
} RA144Context;
void ff_copy_and_dup(int16_t *target, const int16_t *source, int offset);
@ -68,7 +72,7 @@ unsigned int ff_rms(const int *data);
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);
int ff_irms(DSPContext *dsp, const int16_t *data/*align 16*/);
void ff_subblock_synthesis(RA144Context *ractx, const int16_t *lpc_coefs,
int cba_idx, int cb1_idx, int cb2_idx,
int gval, int gain);

3
libavcodec/ra144dec.c
View File

@ -34,10 +34,13 @@ static av_cold int ra144_decode_init(AVCodecContext * avctx)
RA144Context *ractx = avctx->priv_data;
ractx->avctx = avctx;
ff_dsputil_init(&ractx->dsp, avctx);
ractx->lpc_coef[0] = ractx->lpc_tables[0];
ractx->lpc_coef[1] = ractx->lpc_tables[1];
AV_ZERO128(ractx->buffer_a+BLOCKSIZE);
avctx->channels = 1;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;

7
libavcodec/ra144enc.c
View File

@ -60,7 +60,9 @@ static av_cold int ra144_encode_init(AVCodecContext * avctx)
ractx = avctx->priv_data;
ractx->lpc_coef[0] = ractx->lpc_tables[0];
ractx->lpc_coef[1] = ractx->lpc_tables[1];
AV_ZERO128(ractx->buffer_a+BLOCKSIZE);
ractx->avctx = avctx;
ff_dsputil_init(&ractx->dsp, avctx);
ret = ff_lpc_init(&ractx->lpc_ctx, avctx->frame_size, LPC_ORDER,
FF_LPC_TYPE_LEVINSON);
if (ret < 0)
@ -334,7 +336,6 @@ static void ra144_encode_subblock(RA144Context *ractx,
float data[BLOCKSIZE] = { 0 }, work[LPC_ORDER + BLOCKSIZE];
float coefs[LPC_ORDER];
float zero[BLOCKSIZE], cba[BLOCKSIZE], cb1[BLOCKSIZE], cb2[BLOCKSIZE];
int16_t cba_vect[BLOCKSIZE];
int cba_idx, cb1_idx, cb2_idx, gain;
int i, n;
unsigned m[3];
@ -373,8 +374,8 @@ static void ra144_encode_subblock(RA144Context *ractx,
*/
memcpy(cba, work + LPC_ORDER, sizeof(cba));
ff_copy_and_dup(cba_vect, ractx->adapt_cb, cba_idx + BLOCKSIZE / 2 - 1);
m[0] = (ff_irms(cba_vect) * rms) >> 12;
ff_copy_and_dup(ractx->buffer_a, ractx->adapt_cb, cba_idx + BLOCKSIZE / 2 - 1);
m[0] = (ff_irms(&ractx->dsp, ractx->buffer_a) * rms) >> 12;
}
fixed_cb_search(work + LPC_ORDER, coefs, data, cba_idx, &cb1_idx, &cb2_idx);
for (i = 0; i < BLOCKSIZE; i++) {