Function ff_dca_core_dequantize

libavcodec/dca_core.h:226–247

}

static inline void ff_dca_core_dequantize(int32_t *output, const int32_t *input,
                                          int32_t step_size, int32_t scale, int residual, int len)
{
    // Account for quantizer step size
    int64_t step_scale = (int64_t)step_size * scale;
    int n, shift = 0;

    // Limit scale factor resolution to 22 bits
    if (step_scale > (1 << 23)) {
        shift = av_log2(step_scale >> 23) + 1;
        step_scale >>= shift;
    }

    // Scale the samples
    if (residual) {
        for (n = 0; n < len; n++)
            output[n] += clip23(norm__(input[n] * step_scale, 22 - shift));
    } else {
        for (n = 0; n < len; n++)
            output[n]  = clip23(norm__(input[n] * step_scale, 22 - shift));
    }
}

int ff_dca_core_parse(DCACoreDecoder *s, const uint8_t *data, int size);
int ff_dca_core_parse_exss(DCACoreDecoder *s, const uint8_t *data, DCAExssAsset *asset);