Revision 427981c7 libavcodec/ra288.c
| libavcodec/ra288.c | ||
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} |
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static void co(int n, int i, int j, const float *in, float *out, float *st1,
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static void do_hybrid_window(int n, int i, int j, const float *in, float *out, float *st1,
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float *st2, const float *table) |
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{
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unsigned int x; |
| ... | ... | |
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st2[x] = st2[x] * 0.5625 + buffer1[x]; |
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out[x] = st2[x] + buffer2[x]; |
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} |
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*out *= 257./256.; /* to prevent clipping */ |
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/* Multiply by the white noise correcting factor (WNCF) */ |
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*out *= 257./256.; |
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} |
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static void update(Real288_internal *glob) |
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memcpy(buffer1 , glob->output + 20, 20*sizeof(*buffer1)); |
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memcpy(buffer1 + 20, glob->output , 20*sizeof(*buffer1)); |
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co(36, 40, 35, buffer1, temp1, glob->st1a, glob->st1b, table1);
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do_hybrid_window(36, 40, 35, buffer1, temp1, glob->st1a, glob->st1b, table1);
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if (pred(temp1, glob->st1, 36)) |
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colmult(glob->pr1, glob->st1, table1a, 36); |
| ... | ... | |
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memcpy(buffer2 , glob->history + 4, 4*sizeof(*buffer2)); |
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memcpy(buffer2 + 4, glob->history , 4*sizeof(*buffer2)); |
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co(10, 8, 20, buffer2, temp2, glob->st2a, glob->st2b, table2);
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do_hybrid_window(10, 8, 20, buffer2, temp2, glob->st2a, glob->st2b, table2);
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if (pred(temp2, glob->st2, 10)) |
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colmult(glob->pr2, glob->st2, table2a, 10); |
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