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34 lines
986 B
34 lines
986 B
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#define AC3_FRAME_SIZE (6*256) |
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#define AC3_MAX_CODED_FRAME_SIZE 3840 /* in bytes */ |
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#define AC3_MAX_CHANNELS 6 |
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typedef struct AC3EncodeContext { |
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PutBitContext pb; |
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int nb_channels; |
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int nb_all_channels; |
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int lfe_channel; |
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int bit_rate; |
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int sample_rate; |
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int bsid; |
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int frame_size_min; /* minimum frame size in case rounding is necessary */ |
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int frame_size; /* current frame size in words */ |
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int halfratecod; |
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int frmsizecod; |
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int fscod; /* frequency */ |
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int acmod; |
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int lfe; |
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int bsmod; |
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short last_samples[AC3_MAX_CHANNELS][256]; |
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int chbwcod[AC3_MAX_CHANNELS]; |
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int nb_coefs[AC3_MAX_CHANNELS]; |
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/* bitrate allocation control */ |
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int sgaincod, sdecaycod, fdecaycod, dbkneecod, floorcod; |
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int sgain, sdecay, fdecay, dbknee, floor; |
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int csnroffst; |
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int fgaincod[AC3_MAX_CHANNELS]; |
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int fsnroffst[AC3_MAX_CHANNELS]; |
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/* mantissa encoding */ |
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int mant1_cnt, mant2_cnt, mant4_cnt; |
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} AC3EncodeContext;
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