mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
29d147c94d
* commit '059a934806d61f7af9ab3fd9f74994b838ea5eba': lavc: Consistently prefix input buffer defines Conflicts: doc/examples/decoding_encoding.c libavcodec/4xm.c libavcodec/aac_adtstoasc_bsf.c libavcodec/aacdec.c libavcodec/aacenc.c libavcodec/ac3dec.h libavcodec/asvenc.c libavcodec/avcodec.h libavcodec/avpacket.c libavcodec/dvdec.c libavcodec/ffv1enc.c libavcodec/g2meet.c libavcodec/gif.c libavcodec/h264.c libavcodec/h264_mp4toannexb_bsf.c libavcodec/huffyuvdec.c libavcodec/huffyuvenc.c libavcodec/jpeglsenc.c libavcodec/libxvid.c libavcodec/mdec.c libavcodec/motionpixels.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/noise_bsf.c libavcodec/nuv.c libavcodec/nvenc.c libavcodec/options.c libavcodec/parser.c libavcodec/pngenc.c libavcodec/proresenc_kostya.c libavcodec/qsvdec.c libavcodec/svq1enc.c libavcodec/tiffenc.c libavcodec/truemotion2.c libavcodec/utils.c libavcodec/utvideoenc.c libavcodec/vc1dec.c libavcodec/wmalosslessdec.c libavformat/adxdec.c libavformat/aiffdec.c libavformat/apc.c libavformat/apetag.c libavformat/avidec.c libavformat/bink.c libavformat/cafdec.c libavformat/flvdec.c libavformat/id3v2.c libavformat/isom.c libavformat/matroskadec.c libavformat/mov.c libavformat/mpc.c libavformat/mpc8.c libavformat/mpegts.c libavformat/mvi.c libavformat/mxfdec.c libavformat/mxg.c libavformat/nutdec.c libavformat/oggdec.c libavformat/oggparsecelt.c libavformat/oggparseflac.c libavformat/oggparseopus.c libavformat/oggparsespeex.c libavformat/omadec.c libavformat/rawdec.c libavformat/riffdec.c libavformat/rl2.c libavformat/rmdec.c libavformat/rtpdec_latm.c libavformat/rtpdec_mpeg4.c libavformat/rtpdec_qdm2.c libavformat/rtpdec_svq3.c libavformat/sierravmd.c libavformat/smacker.c libavformat/smush.c libavformat/spdifenc.c libavformat/takdec.c libavformat/tta.c libavformat/utils.c libavformat/vqf.c libavformat/westwood_vqa.c libavformat/xmv.c libavformat/xwma.c libavformat/yop.c Merged-by: Michael Niedermayer <michael@niedermayer.cc>
159 lines
6.1 KiB
C
159 lines
6.1 KiB
C
/*
|
|
* WMA compatible codec
|
|
* Copyright (c) 2002-2007 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_WMA_H
|
|
#define AVCODEC_WMA_H
|
|
|
|
#include "libavutil/float_dsp.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "fft.h"
|
|
#include "get_bits.h"
|
|
#include "put_bits.h"
|
|
|
|
/* size of blocks */
|
|
#define BLOCK_MIN_BITS 7
|
|
#define BLOCK_MAX_BITS 11
|
|
#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS)
|
|
|
|
#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1)
|
|
|
|
/* XXX: find exact max size */
|
|
#define HIGH_BAND_MAX_SIZE 16
|
|
|
|
#define NB_LSP_COEFS 10
|
|
|
|
/* XXX: is it a suitable value ? */
|
|
#define MAX_CODED_SUPERFRAME_SIZE 32768
|
|
|
|
#define MAX_CHANNELS 2
|
|
|
|
#define NOISE_TAB_SIZE 8192
|
|
|
|
#define LSP_POW_BITS 7
|
|
|
|
// FIXME should be in wmadec
|
|
#define VLCBITS 9
|
|
#define VLCMAX ((22 + VLCBITS - 1) / VLCBITS)
|
|
|
|
typedef float WMACoef; ///< type for decoded coefficients, int16_t would be enough for wma 1/2
|
|
|
|
typedef struct CoefVLCTable {
|
|
int n; ///< total number of codes
|
|
int max_level;
|
|
const uint32_t *huffcodes; ///< VLC bit values
|
|
const uint8_t *huffbits; ///< VLC bit size
|
|
const uint16_t *levels; ///< table to build run/level tables
|
|
} CoefVLCTable;
|
|
|
|
typedef struct WMACodecContext {
|
|
AVCodecContext *avctx;
|
|
GetBitContext gb;
|
|
PutBitContext pb;
|
|
int version; ///< 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
|
|
int use_bit_reservoir;
|
|
int use_variable_block_len;
|
|
int use_exp_vlc; ///< exponent coding: 0 = lsp, 1 = vlc + delta
|
|
int use_noise_coding; ///< true if perceptual noise is added
|
|
int byte_offset_bits;
|
|
VLC exp_vlc;
|
|
int exponent_sizes[BLOCK_NB_SIZES];
|
|
uint16_t exponent_bands[BLOCK_NB_SIZES][25];
|
|
int high_band_start[BLOCK_NB_SIZES]; ///< index of first coef in high band
|
|
int coefs_start; ///< first coded coef
|
|
int coefs_end[BLOCK_NB_SIZES]; ///< max number of coded coefficients
|
|
int exponent_high_sizes[BLOCK_NB_SIZES];
|
|
int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE];
|
|
VLC hgain_vlc;
|
|
|
|
/* coded values in high bands */
|
|
int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE];
|
|
int high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE];
|
|
|
|
/* there are two possible tables for spectral coefficients */
|
|
// FIXME the following 3 tables should be shared between decoders
|
|
VLC coef_vlc[2];
|
|
uint16_t *run_table[2];
|
|
float *level_table[2];
|
|
uint16_t *int_table[2];
|
|
const CoefVLCTable *coef_vlcs[2];
|
|
/* frame info */
|
|
int frame_len; ///< frame length in samples
|
|
int frame_len_bits; ///< frame_len = 1 << frame_len_bits
|
|
int nb_block_sizes; ///< number of block sizes
|
|
/* block info */
|
|
int reset_block_lengths;
|
|
int block_len_bits; ///< log2 of current block length
|
|
int next_block_len_bits; ///< log2 of next block length
|
|
int prev_block_len_bits; ///< log2 of prev block length
|
|
int block_len; ///< block length in samples
|
|
int block_num; ///< block number in current frame
|
|
int block_pos; ///< current position in frame
|
|
uint8_t ms_stereo; ///< true if mid/side stereo mode
|
|
uint8_t channel_coded[MAX_CHANNELS]; ///< true if channel is coded
|
|
int exponents_bsize[MAX_CHANNELS]; ///< log2 ratio frame/exp. length
|
|
DECLARE_ALIGNED(32, float, exponents)[MAX_CHANNELS][BLOCK_MAX_SIZE];
|
|
float max_exponent[MAX_CHANNELS];
|
|
WMACoef coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
|
|
DECLARE_ALIGNED(32, float, coefs)[MAX_CHANNELS][BLOCK_MAX_SIZE];
|
|
DECLARE_ALIGNED(32, FFTSample, output)[BLOCK_MAX_SIZE * 2];
|
|
FFTContext mdct_ctx[BLOCK_NB_SIZES];
|
|
const float *windows[BLOCK_NB_SIZES];
|
|
/* output buffer for one frame and the last for IMDCT windowing */
|
|
DECLARE_ALIGNED(32, float, frame_out)[MAX_CHANNELS][BLOCK_MAX_SIZE * 2];
|
|
/* last frame info */
|
|
uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + AV_INPUT_BUFFER_PADDING_SIZE]; /* padding added */
|
|
int last_bitoffset;
|
|
int last_superframe_len;
|
|
float noise_table[NOISE_TAB_SIZE];
|
|
int noise_index;
|
|
float noise_mult; /* XXX: suppress that and integrate it in the noise array */
|
|
/* lsp_to_curve tables */
|
|
float lsp_cos_table[BLOCK_MAX_SIZE];
|
|
float lsp_pow_e_table[256];
|
|
float lsp_pow_m_table1[(1 << LSP_POW_BITS)];
|
|
float lsp_pow_m_table2[(1 << LSP_POW_BITS)];
|
|
AVFloatDSPContext *fdsp;
|
|
|
|
#ifdef TRACE
|
|
int frame_count;
|
|
#endif /* TRACE */
|
|
} WMACodecContext;
|
|
|
|
extern const uint16_t ff_wma_hgain_huffcodes[37];
|
|
extern const uint8_t ff_wma_hgain_huffbits[37];
|
|
extern const float ff_wma_lsp_codebook[NB_LSP_COEFS][16];
|
|
extern const uint32_t ff_aac_scalefactor_code[121];
|
|
extern const uint8_t ff_aac_scalefactor_bits[121];
|
|
|
|
int ff_wma_init(AVCodecContext *avctx, int flags2);
|
|
int ff_wma_total_gain_to_bits(int total_gain);
|
|
int ff_wma_end(AVCodecContext *avctx);
|
|
unsigned int ff_wma_get_large_val(GetBitContext *gb);
|
|
int ff_wma_run_level_decode(AVCodecContext *avctx, GetBitContext *gb,
|
|
VLC *vlc, const float *level_table,
|
|
const uint16_t *run_table, int version,
|
|
WMACoef *ptr, int offset, int num_coefs,
|
|
int block_len, int frame_len_bits,
|
|
int coef_nb_bits);
|
|
|
|
#endif /* AVCODEC_WMA_H */
|