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tta: move code that will be shared with encoder to separate file

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-05-27 19:28:09 +00:00
parent a4b5863eea
commit 2e67dde954
4 changed files with 117 additions and 68 deletions
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2
libavcodec/Makefile
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@ -429,7 +429,7 @@ OBJS-$(CONFIG_TRUEMOTION2_DECODER) += truemotion2.o
OBJS-$(CONFIG_TRUESPEECH_DECODER) += truespeech.o
OBJS-$(CONFIG_TSCC_DECODER) += tscc.o msrledec.o
OBJS-$(CONFIG_TSCC2_DECODER) += tscc2.o
OBJS-$(CONFIG_TTA_DECODER) += tta.o
OBJS-$(CONFIG_TTA_DECODER) += tta.o ttadata.o
OBJS-$(CONFIG_TWINVQ_DECODER) += twinvq.o
OBJS-$(CONFIG_TXD_DECODER) += txd.o s3tc.o
OBJS-$(CONFIG_ULTI_DECODER) += ulti.o

81
libavcodec/tta.c
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@ -29,6 +29,7 @@
#define BITSTREAM_READER_LE
#include <limits.h>
#include "ttadata.h"
#include "avcodec.h"
#include "get_bits.h"
#include "unary.h"
@ -40,24 +41,6 @@
#define FORMAT_SIMPLE 1
#define FORMAT_ENCRYPTED 2
#define MAX_ORDER 16
typedef struct TTAFilter {
int32_t shift, round, error;
int32_t qm[MAX_ORDER];
int32_t dx[MAX_ORDER];
int32_t dl[MAX_ORDER];
} TTAFilter;
typedef struct TTARice {
uint32_t k0, k1, sum0, sum1;
} TTARice;
typedef struct TTAChannel {
int32_t predictor;
TTAFilter filter;
TTARice rice;
} TTAChannel;
typedef struct TTAContext {
AVClass *class;
AVCodecContext *avctx;
@ -75,40 +58,6 @@ typedef struct TTAContext {
TTAChannel *ch_ctx;
} TTAContext;
static const uint32_t shift_1[] = {
0x00000001, 0x00000002, 0x00000004, 0x00000008,
0x00000010, 0x00000020, 0x00000040, 0x00000080,
0x00000100, 0x00000200, 0x00000400, 0x00000800,
0x00001000, 0x00002000, 0x00004000, 0x00008000,
0x00010000, 0x00020000, 0x00040000, 0x00080000,
0x00100000, 0x00200000, 0x00400000, 0x00800000,
0x01000000, 0x02000000, 0x04000000, 0x08000000,
0x10000000, 0x20000000, 0x40000000, 0x80000000,
0x80000000, 0x80000000, 0x80000000, 0x80000000,
0x80000000, 0x80000000, 0x80000000, 0x80000000
};
static const uint32_t * const shift_16 = shift_1 + 4;
static const int32_t ttafilter_configs[4] = {
10,
9,
10,
12
};
static void ttafilter_init(TTAContext *s, TTAFilter *c, int32_t shift) {
memset(c, 0, sizeof(TTAFilter));
if (s->format == FORMAT_ENCRYPTED) {
int i;
for (i = 0; i < 8; i++)
c->qm[i] = sign_extend(s->crc_pass[i], 8);
}
c->shift = shift;
c->round = shift_1[shift-1];
// c->round = 1 << (shift - 1);
}
static inline void ttafilter_process(TTAFilter *c, int32_t *in)
{
register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
@ -140,14 +89,6 @@ static inline void ttafilter_process(TTAFilter *c, int32_t *in)
dl[5] += dl[6]; dl[4] += dl[5];
}
static void rice_init(TTARice *c, uint32_t k0, uint32_t k1)
{
c->k0 = k0;
c->k1 = k1;
c->sum0 = shift_16[k0];
c->sum1 = shift_16[k1];
}
static const int64_t tta_channel_layouts[7] = {
AV_CH_LAYOUT_STEREO,
AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
@ -319,9 +260,15 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
// init per channel states
for (i = 0; i < s->channels; i++) {
TTAFilter *filter = &s->ch_ctx[i].filter;
s->ch_ctx[i].predictor = 0;
ttafilter_init(s, &s->ch_ctx[i].filter, ttafilter_configs[s->bps-1]);
rice_init(&s->ch_ctx[i].rice, 10, 10);
ff_tta_filter_init(filter, ff_tta_filter_configs[s->bps-1]);
if (s->format == FORMAT_ENCRYPTED) {
int i;
for (i = 0; i < 8; i++)
filter->qm[i] = sign_extend(s->crc_pass[i], 8);
}
ff_tta_rice_init(&s->ch_ctx[i].rice, 10, 10);
}
i = 0;
@ -361,16 +308,16 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
switch (depth) {
case 1:
rice->sum1 += value - (rice->sum1 >> 4);
if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
if (rice->k1 > 0 && rice->sum1 < ff_tta_shift_16[rice->k1])
rice->k1--;
else if(rice->sum1 > shift_16[rice->k1 + 1])
else if(rice->sum1 > ff_tta_shift_16[rice->k1 + 1])
rice->k1++;
value += shift_1[rice->k0];
value += ff_tta_shift_1[rice->k0];
default:
rice->sum0 += value - (rice->sum0 >> 4);
if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
if (rice->k0 > 0 && rice->sum0 < ff_tta_shift_16[rice->k0])
rice->k0--;
else if(rice->sum0 > shift_16[rice->k0 + 1])
else if(rice->sum0 > ff_tta_shift_16[rice->k0 + 1])
rice->k0++;
}

52
libavcodec/ttadata.c Normal file
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@ -0,0 +1,52 @@
/*
* TTA (The Lossless True Audio) data
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "ttadata.h"
const uint32_t ff_tta_shift_1[] = {
0x00000001, 0x00000002, 0x00000004, 0x00000008,
0x00000010, 0x00000020, 0x00000040, 0x00000080,
0x00000100, 0x00000200, 0x00000400, 0x00000800,
0x00001000, 0x00002000, 0x00004000, 0x00008000,
0x00010000, 0x00020000, 0x00040000, 0x00080000,
0x00100000, 0x00200000, 0x00400000, 0x00800000,
0x01000000, 0x02000000, 0x04000000, 0x08000000,
0x10000000, 0x20000000, 0x40000000, 0x80000000,
0x80000000, 0x80000000, 0x80000000, 0x80000000,
0x80000000, 0x80000000, 0x80000000, 0x80000000
};
const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4;
const uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 };
void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1)
{
c->k0 = k0;
c->k1 = k1;
c->sum0 = ff_tta_shift_16[k0];
c->sum1 = ff_tta_shift_16[k1];
}
void ff_tta_filter_init(TTAFilter *c, int32_t shift) {
memset(c, 0, sizeof(TTAFilter));
c->shift = shift;
c->round = ff_tta_shift_1[shift-1];
}

50
libavcodec/ttadata.h Normal file
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@ -0,0 +1,50 @@
/*
* TTA (The Lossless True Audio) data
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_TTADATA_H
#define AVCODEC_TTADATA_H
#include "internal.h"
#define MAX_ORDER 16
typedef struct TTAFilter {
int32_t shift, round, error;
int32_t qm[MAX_ORDER];
int32_t dx[MAX_ORDER];
int32_t dl[MAX_ORDER];
} TTAFilter;
typedef struct TTARice {
uint32_t k0, k1, sum0, sum1;
} TTARice;
typedef struct TTAChannel {
int32_t predictor;
TTAFilter filter;
TTARice rice;
} TTAChannel;
extern const uint32_t ff_tta_shift_1[];
extern const uint32_t * const ff_tta_shift_16;
extern const uint8_t ff_tta_filter_configs[];
void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1);
void ff_tta_filter_init(TTAFilter *c, int32_t shift);
#endif /* AVCODEC_TTADATA_H */