/*
* WMA compatible codec
- * Copyright (c) 2002-2007 The FFmpeg Project.
+ * Copyright (c) 2002-2007 The Libav Project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef WMA_H
-#define WMA_H
+#ifndef AVCODEC_WMA_H
+#define AVCODEC_WMA_H
-#include "bitstream.h"
+#include "libavutil/float_dsp.h"
+#include "get_bits.h"
+#include "put_bits.h"
#include "dsputil.h"
+#include "fft.h"
+#include "fmtconvert.h"
/* size of blocks */
#define BLOCK_MIN_BITS 7
#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 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 */
+ 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 WMADecodeContext {
+typedef struct WMACodecContext {
+ AVCodecContext* avctx;
+ AVFrame frame;
GetBitContext gb;
PutBitContext pb;
int sample_rate;
int nb_channels;
int bit_rate;
- int version; /* 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2) */
+ int version; ///< 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
int block_align;
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 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 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;
//FIXME the following 3 tables should be shared between decoders
VLC coef_vlc[2];
uint16_t *run_table[2];
- uint16_t *level_table[2];
+ float *level_table[2];
uint16_t *int_table[2];
- CoefVLCTable *coef_vlcs[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 */
+ 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 */
- DECLARE_ALIGNED_16(float, exponents[MAX_CHANNELS][BLOCK_MAX_SIZE]);
+ 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];
- int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
- DECLARE_ALIGNED_16(float, coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]);
- DECLARE_ALIGNED_16(FFTSample, output[BLOCK_MAX_SIZE * 2]);
- DECLARE_ALIGNED_16(float, window[BLOCK_MAX_SIZE * 2]);
- MDCTContext mdct_ctx[BLOCK_NB_SIZES];
+ 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];
float *windows[BLOCK_NB_SIZES];
- DECLARE_ALIGNED_16(FFTSample, mdct_tmp[BLOCK_MAX_SIZE]); /* temporary storage for imdct */
/* output buffer for one frame and the last for IMDCT windowing */
- DECLARE_ALIGNED_16(float, frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE * 2]);
+ DECLARE_ALIGNED(32, float, frame_out)[MAX_CHANNELS][BLOCK_MAX_SIZE * 2];
/* last frame info */
- uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4]; /* padding added */
+ uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE]; /* padding added */
int last_bitoffset;
int last_superframe_len;
float noise_table[NOISE_TAB_SIZE];
float lsp_pow_m_table1[(1 << LSP_POW_BITS)];
float lsp_pow_m_table2[(1 << LSP_POW_BITS)];
DSPContext dsp;
+ FmtConvertContext fmt_conv;
+ AVFloatDSPContext fdsp;
#ifdef TRACE
int frame_count;
#endif
-} WMADecodeContext;
+} WMACodecContext;
+extern const uint16_t ff_wma_critical_freqs[25];
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_wma_scale_huffcodes[121];
-extern const uint8_t ff_wma_scale_huffbits[121];
+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);
-
-#endif
+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 */
projects / ffmpeg / blobdiff