On 16 June 2010 03:13, Benjamin Larsson <[email protected]> wrote:
>
[...]
>> +
>> + // cur_lsp * 0.25 + prev_lsp * 0.75
>> + ff_acelp_weighted_vector_sum(&lpc[1], cur_lsp, prev_lsp,
>> + 4096, 12288, 1 << 13, 14, LPC_ORDER);
>> + ff_acelp_weighted_vector_sum(&lpc[LPC_ORDER + 1], cur_lsp, prev_lsp,
>> + 8192, 8192, 1 << 13, 14, LPC_ORDER);
>> + ff_acelp_weighted_vector_sum(&lpc[LPC_ORDER * 2 + 2], cur_lsp, prev_lsp,
>> + 12288, 4096, 1 << 13, 14, LPC_ORDER);
>> + memcpy(&lpc[LPC_ORDER * 3 + 3], cur_lsp, LPC_ORDER * sizeof(int16_t));
>> +
>> + for (i = 0; i < SUBFRAMES; i++) {
>> + // Calculate cosine
>> + for (j = 1; j <= LPC_ORDER; j++) {
>> + int index = ptr[j] >> 7;
>> + int offset = ptr[j] & 0x7f;
>> + int64_t temp1 = cos_tab[index] << 16;
>> + int temp2 = (cos_tab[index + 1] - cos_tab[index]) *
>> + ((offset << 8) + 0x80) << 1;
>> + ptr[j] = av_clipl_int32(((temp1 + temp2) << 1) + (1 << 15)) >>
>> 16;
>> + }
>> +
>> + ff_acelp_lsp2lpc(ptr, ptr, LPC_ORDER >> 1);
>> + ptr += LPC_ORDER + 1;
>> + }
>> +}
>> +
>
> Is it bit exact compared to the ref decoder ?
>
Now bit exact.
Regards
Naufal
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