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right shift the values by 8 in GAQ remap "B" table. data now fits in int8_t. 

Originally committed as revision 14958 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2008-08-25 00:15:29 +00:00
parent 8bc98ba92b
commit ffc2b3412c
2 changed files with 12 additions and 11 deletions
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21
libavcodec/ac3dec_data.c
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@ -87,18 +87,19 @@ const int16_t ff_eac3_gaq_remap_2_4_a[9][2] = {
/**
* Table E3.6, Gk=2 & Gk=4, B
* Large mantissa inverse quantization, negative mantissa remapping offsets
* Table values from the spec are right-shifted by 8 to simplify calculations.
* ff_eac3_gaq_remap_3_4_b[hebap-8][Gk=2,4]
*/
const int16_t ff_eac3_gaq_remap_2_4_b[9][2] = {
{ -5461, -1170},
{ -11703, -4915},
{ -14199, -6606},
{ -15327, -7412},
{ -15864, -7805},
{ -16126, -7999},
{ -16255, -8096},
{ -16320, -8144},
{ -16352, -8168}
const int8_t ff_eac3_gaq_remap_2_4_b[9][2] = {
{ -22, -5 },
{ -46, -20 },
{ -56, -26 },
{ -60, -29 },
{ -62, -31 },
{ -63, -32 },
{ -64, -32 },
{ -64, -32 },
{ -64, -32 },
};
static const int16_t vq_hebap1[4][6] = {

2
libavcodec/ac3dec_data.h
View File

@ -29,7 +29,7 @@ extern const uint8_t ff_eac3_hebap_tab[64];
extern const uint8_t ff_eac3_bits_vs_hebap[20];
extern const int16_t ff_eac3_gaq_remap_1[12];
extern const int16_t ff_eac3_gaq_remap_2_4_a[9][2];
extern const int16_t ff_eac3_gaq_remap_2_4_b[9][2];
extern const int8_t ff_eac3_gaq_remap_2_4_b[9][2];
extern const int16_t (*ff_eac3_vq_hebap[8])[6];
extern const uint8_t ff_eac3_frm_expstr[32][6];