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authorMans Rullgard <mans@mansr.com>2011-03-11 02:49:55 +0000
committerMans Rullgard <mans@mansr.com>2011-03-29 19:31:45 +0100
commit6d9f52b2cd760eacf6cc6b7d694b0b00d991f1de (patch)
treeb6275771445a9cf058d92cb5fb2847698a3414a8 /libavcodec/ac3.c
parentd38345878cbb89e4d8d33bd79f47836d4e9cd637 (diff)
downloadffmpeg-6d9f52b2cd760eacf6cc6b7d694b0b00d991f1de.tar.gz
ac3: move ff_ac3_bit_alloc_calc_bap to ac3dsp
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec/ac3.c')
-rw-r--r--libavcodec/ac3.c46
1 files changed, 11 insertions, 35 deletions
diff --git a/libavcodec/ac3.c b/libavcodec/ac3.c
index c8659fe6f5..704c6e03a6 100644
--- a/libavcodec/ac3.c
+++ b/libavcodec/ac3.c
@@ -31,7 +31,7 @@
/**
* Starting frequency coefficient bin for each critical band.
*/
-static const uint8_t band_start_tab[AC3_CRITICAL_BANDS+1] = {
+const uint8_t ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 26, 27, 28, 31,
@@ -44,7 +44,7 @@ static const uint8_t band_start_tab[AC3_CRITICAL_BANDS+1] = {
/**
* Map each frequency coefficient bin to the critical band that contains it.
*/
-static const uint8_t bin_to_band_tab[253] = {
+const uint8_t ff_ac3_bin_to_band_tab[253] = {
0,
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
@@ -70,7 +70,7 @@ static const uint8_t bin_to_band_tab[253] = {
};
#else /* CONFIG_HARDCODED_TABLES */
-static uint8_t bin_to_band_tab[253];
+uint8_t ff_ac3_bin_to_band_tab[253];
#endif
static inline int calc_lowcomp1(int a, int b0, int b1, int c)
@@ -106,10 +106,10 @@ void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd,
/* PSD integration */
bin = start;
- band = bin_to_band_tab[start];
+ band = ff_ac3_bin_to_band_tab[start];
do {
int v = psd[bin++];
- int band_end = FFMIN(band_start_tab[band+1], end);
+ int band_end = FFMIN(ff_ac3_band_start_tab[band+1], end);
for (; bin < band_end; bin++) {
int max = FFMAX(v, psd[bin]);
/* logadd */
@@ -117,7 +117,7 @@ void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd,
v = max + ff_ac3_log_add_tab[adr];
}
band_psd[band++] = v;
- } while (end > band_start_tab[band]);
+ } while (end > ff_ac3_band_start_tab[band]);
}
int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
@@ -132,8 +132,8 @@ int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
int lowcomp, fastleak, slowleak;
/* excitation function */
- band_start = bin_to_band_tab[start];
- band_end = bin_to_band_tab[end-1] + 1;
+ band_start = ff_ac3_bin_to_band_tab[start];
+ band_end = ff_ac3_bin_to_band_tab[end-1] + 1;
if (band_start == 0) {
lowcomp = 0;
@@ -212,30 +212,6 @@ int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
return 0;
}
-void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
- int snr_offset, int floor,
- const uint8_t *bap_tab, uint8_t *bap)
-{
- int bin, band;
-
- /* special case, if snr offset is -960, set all bap's to zero */
- if (snr_offset == -960) {
- memset(bap, 0, AC3_MAX_COEFS);
- return;
- }
-
- bin = start;
- band = bin_to_band_tab[start];
- do {
- int m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;
- int band_end = FFMIN(band_start_tab[band+1], end);
- for (; bin < band_end; bin++) {
- int address = av_clip((psd[bin] - m) >> 5, 0, 63);
- bap[bin] = bap_tab[address];
- }
- } while (end > band_start_tab[band++]);
-}
-
/**
* Initialize some tables.
* note: This function must remain thread safe because it is called by the
@@ -244,12 +220,12 @@ void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
av_cold void ff_ac3_common_init(void)
{
#if !CONFIG_HARDCODED_TABLES
- /* compute bin_to_band_tab from band_start_tab */
+ /* compute ff_ac3_bin_to_band_tab from ff_ac3_band_start_tab */
int bin = 0, band;
for (band = 0; band < AC3_CRITICAL_BANDS; band++) {
- int band_end = band_start_tab[band+1];
+ int band_end = ff_ac3_band_start_tab[band+1];
while (bin < band_end)
- bin_to_band_tab[bin++] = band;
+ ff_ac3_bin_to_band_tab[bin++] = band;
}
#endif /* !CONFIG_HARDCODED_TABLES */
}