/*
- * Common code between AC3 encoder and decoder
+ * Common code between the AC-3 encoder and decoder
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
*
* This file is part of FFmpeg.
/**
* @file ac3.h
- * Common code between AC3 encoder and decoder.
+ * Common code between the AC-3 encoder and decoder.
*/
-#ifndef FFMPEG_AC3_H
-#define FFMPEG_AC3_H
+#ifndef AVCODEC_AC3_H
+#define AVCODEC_AC3_H
#include "ac3tab.h"
#define AC3_MAX_CODED_FRAME_SIZE 3840 /* in bytes */
#define AC3_MAX_CHANNELS 6 /* including LFE channel */
-#define NB_BLOCKS 6 /* number of PCM blocks inside an AC3 frame */
+#define NB_BLOCKS 6 /* number of PCM blocks inside an AC-3 frame */
#define AC3_FRAME_SIZE (NB_BLOCKS * 256)
/* exponent encoding strategy */
uint8_t channel_mode;
uint8_t lfe_on;
uint8_t frame_type;
+ int substreamid; ///< substream identification
+ int center_mix_level; ///< Center mix level index
+ int surround_mix_level; ///< Surround mix level index
+ uint16_t channel_map;
+ int num_blocks; ///< number of audio blocks
/** @} */
/** @defgroup derived Derived values
uint32_t bit_rate;
uint8_t channels;
uint16_t frame_size;
- int center_mix_level; ///< Center mix level index
- int surround_mix_level; ///< Surround mix level index
/** @} */
} AC3HeaderInfo;
* @param[in] end ending bin location
* @param[in] snr_offset SNR adjustment
* @param[in] floor noise floor
+ * @param[in] bap_tab look-up table for bit allocation pointers
* @param[out] bap bit allocation pointers
*/
void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
- int snr_offset, int floor, uint8_t *bap);
+ int snr_offset, int floor,
+ const uint8_t *bap_tab, uint8_t *bap);
void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,
int8_t *exp, int start, int end,
uint8_t *dba_offsets, uint8_t *dba_lengths,
uint8_t *dba_values);
-#endif /* FFMPEG_AC3_H */
+#endif /* AVCODEC_AC3_H */