#include "ac3.h"
#include "get_bits.h"
-#if CONFIG_HARDCODED_TABLES
-
/**
* Starting frequency coefficient bin for each critical band.
*/
79, 85, 97, 109, 121, 133, 157, 181, 205, 229, 253
};
+#if CONFIG_HARDCODED_TABLES
+
/**
* Map each frequency coefficient bin to the critical band that contains it.
*/
};
#else /* CONFIG_HARDCODED_TABLES */
-static const uint8_t ff_ac3_critical_band_size_tab[AC3_CRITICAL_BANDS]={
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3,
- 3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24
-};
-
-static uint8_t band_start_tab[51];
static uint8_t bin_to_band_tab[253];
#endif
av_cold void ac3_common_init(void)
{
#if !CONFIG_HARDCODED_TABLES
- /* compute bndtab and masktab from bandsz */
+ /* compute bin_to_band_tab from band_start_tab */
int bin = 0, band;
for (band = 0; band < AC3_CRITICAL_BANDS; band++) {
- int band_end = bin + ff_ac3_critical_band_size_tab[band];
- band_start_tab[band] = bin;
+ int band_end = band_start_tab[band+1];
while (bin < band_end)
bin_to_band_tab[bin++] = band;
}
- band_start_tab[AC3_CRITICAL_BANDS] = bin;
#endif /* !CONFIG_HARDCODED_TABLES */
}