mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-10-03 03:30:45 +00:00
2af8f2cea6
* qatar/master: (27 commits) cmdutils: use new avcodec_is_decoder/encoder() functions. lavc: make codec_is_decoder/encoder() public. lavc: deprecate AVCodecContext.sub_id. libcdio: add a forgotten AVClass to the private context. swscale: remove "cpu flags" from -sws_flags description. proresenc: give user a possibility to alter some encoding parameters vorbisenc: add output buffer overwrite protection libopencore-amrnbenc: fix end-of-stream handling ra144enc: fix end-of-stream handling nellymoserenc: zero any leftover packet bytes nellymoserenc: use proper MDCT overlap delay qpeg: Use bytestream2 functions to prevent buffer overreads. swscale: make %rep unconditional. vp8: convert simple loopfilter x86 assembly to use named arguments. vp8: convert idct x86 assembly to use named arguments. vp8: convert mc x86 assembly to use named arguments. vp8: convert loopfilter x86 assembly to use cpuflags(). vp8: convert idct/mc x86 assembly to use cpuflags(). swscale: remove now unnecessary hack. x86inc: don't "bake" stack_offset in named arguments. ... Conflicts: cmdutils.c doc/APIchanges libavcodec/mpeg12.c libavcodec/options.c libavcodec/qpeg.c libavcodec/utils.c libavcodec/version.h libavdevice/libcdio.c tests/lavf-regression.sh Merged-by: Michael Niedermayer <michaelni@gmx.at>
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/*
|
|
* Real Audio 1.0 (14.4K)
|
|
* Copyright (c) 2003 the ffmpeg project
|
|
*
|
|
* 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_RA144_H
|
|
#define AVCODEC_RA144_H
|
|
|
|
#include <stdint.h>
|
|
#include "lpc.h"
|
|
|
|
#define NBLOCKS 4 ///< number of subblocks within a block
|
|
#define BLOCKSIZE 40 ///< subblock size in 16-bit words
|
|
#define BUFFERSIZE 146 ///< the size of the adaptive codebook
|
|
#define FIXED_CB_SIZE 128 ///< size of fixed codebooks
|
|
#define FRAMESIZE 20 ///< size of encoded frame
|
|
#define LPC_ORDER 10 ///< order of LPC filter
|
|
|
|
typedef struct {
|
|
AVCodecContext *avctx;
|
|
AVFrame frame;
|
|
LPCContext lpc_ctx;
|
|
int last_frame;
|
|
|
|
unsigned int old_energy; ///< previous frame energy
|
|
|
|
unsigned int lpc_tables[2][10];
|
|
|
|
/** LPC coefficients: lpc_coef[0] is the coefficients of the current frame
|
|
* and lpc_coef[1] of the previous one. */
|
|
unsigned int *lpc_coef[2];
|
|
|
|
unsigned int lpc_refl_rms[2];
|
|
|
|
int16_t curr_block[NBLOCKS * BLOCKSIZE];
|
|
|
|
/** The current subblock padded by the last 10 values of the previous one. */
|
|
int16_t curr_sblock[50];
|
|
|
|
/** Adaptive codebook, its size is two units bigger to avoid a
|
|
* buffer overflow. */
|
|
uint16_t adapt_cb[146+2];
|
|
} RA144Context;
|
|
|
|
void ff_copy_and_dup(int16_t *target, const int16_t *source, int offset);
|
|
int ff_eval_refl(int *refl, const int16_t *coefs, AVCodecContext *avctx);
|
|
void ff_eval_coefs(int *coefs, const int *refl);
|
|
void ff_int_to_int16(int16_t *out, const int *inp);
|
|
int ff_t_sqrt(unsigned int x);
|
|
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);
|
|
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];
|
|
extern const int8_t ff_cb1_vects[128][40];
|
|
extern const int8_t ff_cb2_vects[128][40];
|
|
extern const uint16_t ff_cb1_base[128];
|
|
extern const uint16_t ff_cb2_base[128];
|
|
extern const int16_t ff_energy_tab[32];
|
|
extern const int16_t * const ff_lpc_refl_cb[10];
|
|
|
|
#endif /* AVCODEC_RA144_H */
|