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Code Issues Releases Activity

pass bap table to ff_ac3_bit_alloc_calc_bap()

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Originally committed as revision 13694 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2008-06-07 22:29:54 +00:00
parent 30cc3ac20e
commit 687671f03b
4 changed files with 11 additions and 6 deletions
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8
libavcodec/ac3.c
View File

@ -173,7 +173,8 @@ void ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
}
void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
int snr_offset, int floor, uint8_t *bap)
int snr_offset, int floor,
const uint8_t *bap_tab, uint8_t *bap)
{
int i, j, k, end1, v, address;
@ -190,7 +191,7 @@ void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
end1 = FFMIN(band_start_tab[j] + ff_ac3_critical_band_size_tab[j], end);
for (k = i; k < end1; k++) {
address = av_clip((psd[i] - v) >> 5, 0, 63);
bap[i] = ff_ac3_bap_tab[address];
bap[i] = bap_tab[address];
i++;
}
} while (end > band_start_tab[j++]);
@ -215,7 +216,8 @@ void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,
dba_mode, dba_nsegs, dba_offsets, dba_lengths, dba_values,
mask);
ff_ac3_bit_alloc_calc_bap(mask, psd, start, end, snr_offset, s->floor, bap);
ff_ac3_bit_alloc_calc_bap(mask, psd, start, end, snr_offset, s->floor,
ff_ac3_bap_tab, bap);
}
/**

4
libavcodec/ac3.h
View File

@ -168,10 +168,12 @@ void ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,
* @param[in] end ending bin location
* @param[in] snr_offset SNR adjustment
* @param[in] floor noise floor
* @param[in] bap_tab look-up table for bit allocation pointers
* @param[out] bap bit allocation pointers
*/
void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
int snr_offset, int floor, uint8_t *bap);
int snr_offset, int floor,
const uint8_t *bap_tab, uint8_t *bap);
void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,
int8_t *exp, int start, int end,

2
libavcodec/ac3dec.c
View File

@ -1047,7 +1047,7 @@ static int ac3_parse_audio_block(AC3DecodeContext *s, int blk)
s->start_freq[ch], s->end_freq[ch],
s->snr_offset[ch],
s->bit_alloc_params.floor,
s->bap[ch]);
ff_ac3_bap_tab, s->bap[ch]);
}
}

3
libavcodec/ac3enc.c
View File

@ -463,7 +463,8 @@ static int bit_alloc(AC3EncodeContext *s,
for(ch=0;ch<s->nb_all_channels;ch++) {
ff_ac3_bit_alloc_calc_bap(mask[i][ch], psd[i][ch], 0,
s->nb_coefs[ch], snr_offset,
s->bit_alloc.floor, bap[i][ch]);
s->bit_alloc.floor, ff_ac3_bap_tab,
bap[i][ch]);
frame_bits += compute_mantissa_size(s, bap[i][ch],
s->nb_coefs[ch]);
}