/*
* WMA compatible codec
- * Copyright (c) 2002-2007 The FFmpeg Project.
+ * Copyright (c) 2002-2007 The FFmpeg Project
*
* This file is part of FFmpeg.
*
* 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 "get_bits.h"
+#include "put_bits.h"
#include "dsputil.h"
/* size of blocks */
#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 uint16_t *levels; ///< table to build run/level tables
} CoefVLCTable;
-typedef struct WMADecodeContext {
+typedef struct WMACodecContext {
AVCodecContext* avctx;
GetBitContext gb;
PutBitContext pb;
//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 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 exponents_bsize[MAX_CHANNELS]; ///< log2 ratio frame/exp. length
+ DECLARE_ALIGNED_16(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_16(float, coefs)[MAX_CHANNELS][BLOCK_MAX_SIZE];
+ DECLARE_ALIGNED_16(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_16(float, frame_out)[MAX_CHANNELS][BLOCK_MAX_SIZE * 2];
/* last frame info */
uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4]; /* padding added */
int last_bitoffset;
#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];
+int av_cold ff_wma_get_frame_len_bits(int sample_rate, int version,
+ unsigned int decode_flags);
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 */