virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

g722: Split out g722_qmf_apply() function into g722dsp.c

Browse Source 
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Peter Meerwald 2015-02-15 12:21:21 +01:00 committed by Martin Storsjö
parent 4abfa387b8
commit 6769068313
7 changed files with 91 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libavcodec/Makefile
View File

@ -511,8 +511,8 @@ OBJS-$(CONFIG_ADPCM_EA_R1_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_EA_R2_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_EA_R3_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_EA_XAS_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_G722_DECODER) += g722.o g722dec.o
OBJS-$(CONFIG_ADPCM_G722_ENCODER) += g722.o g722enc.o
OBJS-$(CONFIG_ADPCM_G722_DECODER) += g722.o g722dsp.o g722dec.o
OBJS-$(CONFIG_ADPCM_G722_ENCODER) += g722.o g722dsp.o g722enc.o
OBJS-$(CONFIG_ADPCM_G726_DECODER) += g726.o
OBJS-$(CONFIG_ADPCM_G726_ENCODER) += g726.o
OBJS-$(CONFIG_ADPCM_IMA_AMV_DECODER) += adpcm.o adpcm_data.o

22
libavcodec/g722.c
View File

@ -71,16 +71,6 @@ const int16_t ff_g722_low_inv_quant6[64] = {
211, 170, 130, 91, 54, 17, -54, -17
};
/**
* quadrature mirror filter (QMF) coefficients
*
* ITU-T G.722 Table 11
*/
static const int16_t qmf_coeffs[12] = {
3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
};
/**
* adaptive predictor
*
@ -157,15 +147,3 @@ void ff_g722_update_high_predictor(struct G722Band *band, const int dhigh,
high_log_factor_step[ihigh&1], 0, 22528);
band->scale_factor = linear_scale_factor(band->log_factor - (10 << 11));
}
void ff_g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
{
int i;
*xout1 = 0;
*xout2 = 0;
for (i = 0; i < 12; i++) {
MAC16(*xout2, prev_samples[2*i ], qmf_coeffs[i ]);
MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]);
}
}

5
libavcodec/g722.h
View File

@ -27,6 +27,7 @@
#include <stdint.h>
#include "avcodec.h"
#include "g722dsp.h"
#define PREV_SAMPLES_BUF_SIZE 1024
@ -61,6 +62,8 @@ typedef struct G722Context {
int value;
int prev;
} *paths[2];
G722DSPContext dsp;
} G722Context;
extern const int16_t ff_g722_high_inv_quant[4];
@ -72,6 +75,4 @@ void ff_g722_update_low_predictor(struct G722Band *band, const int ilow);
void ff_g722_update_high_predictor(struct G722Band *band, const int dhigh,
const int ihigh);
void ff_g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2);
#endif /* AVCODEC_G722_H */

6
libavcodec/g722dec.c
View File

@ -67,6 +67,8 @@ static av_cold int g722_decode_init(AVCodecContext * avctx)
c->band[1].scale_factor = 2;
c->prev_samples_pos = 22;
ff_g722dsp_init(&c->dsp);
return 0;
}
@ -122,8 +124,8 @@ static int g722_decode_frame(AVCodecContext *avctx, void *data,
c->prev_samples[c->prev_samples_pos++] = rlow + rhigh;
c->prev_samples[c->prev_samples_pos++] = rlow - rhigh;
ff_g722_apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
&xout1, &xout2);
c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
&xout1, &xout2);
*out_buf++ = av_clip_int16(xout1 >> 11);
*out_buf++ = av_clip_int16(xout2 >> 11);
if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {

47
libavcodec/g722dsp.c Normal file
View File

@ -0,0 +1,47 @@
/*
* Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "g722dsp.h"
#include "mathops.h"
/*
* quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
* in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
*/
static const int16_t qmf_coeffs[12] = {
3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
};
static void g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
{
int i;
*xout1 = 0;
*xout2 = 0;
for (i = 0; i < 12; i++) {
MAC16(*xout2, prev_samples[2*i ], qmf_coeffs[i ]);
MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]);
}
}
av_cold void ff_g722dsp_init(G722DSPContext *c)
{
c->apply_qmf = g722_apply_qmf;
}

32
libavcodec/g722dsp.h Normal file
View File

@ -0,0 +1,32 @@
/*
* Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_G722DSP_H
#define AVCODEC_G722DSP_H
#include <stdint.h>
typedef struct G722DSPContext {
void (*apply_qmf)(const int16_t *prev_samples, int *xout1, int *xout2);
} G722DSPContext;
void ff_g722dsp_init(G722DSPContext *c);
#endif /* AVCODEC_G722DSP_H */

4
libavcodec/g722enc.c
View File

@ -119,6 +119,8 @@ static av_cold int g722_encode_init(AVCodecContext * avctx)
}
}
ff_g722dsp_init(&c->dsp);
return 0;
error:
g722_encode_close(avctx);
@ -138,7 +140,7 @@ static inline void filter_samples(G722Context *c, const int16_t *samples,
int xout1, xout2;
c->prev_samples[c->prev_samples_pos++] = samples[0];
c->prev_samples[c->prev_samples_pos++] = samples[1];
ff_g722_apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
*xlow = xout1 + xout2 >> 14;
*xhigh = xout1 - xout2 >> 14;
if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {