generic-library/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ac3enc: move mant*_cnt and qmant*_ptr out of AC3EncodeContext

Browse Source 
These fields are only used in quantize_mantissas() and reset
on each call, no need to store them in the main context.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-03-13 16:22:07 +00:00
parent e0be794a71
commit 6f718471ea
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
libavcodec/ac3enc.c
View File

@ -178,10 +178,6 @@ typedef struct AC3EncodeContext {
int frame_bits; ///< all frame bits except exponents and mantissas int frame_bits; ///< all frame bits except exponents and mantissas
int exponent_bits; ///< number of bits used for exponents int exponent_bits; ///< number of bits used for exponents
/* mantissa encoding */
int mant1_cnt, mant2_cnt, mant4_cnt; ///< mantissa counts for bap=1,2,4
uint16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr; ///< mantissa pointers for bap=1,2,4
SampleType **planar_samples; SampleType **planar_samples;
uint8_t *bap_buffer; uint8_t *bap_buffer;
uint8_t *bap1_buffer; uint8_t *bap1_buffer;
@ -199,6 +195,10 @@ typedef struct AC3EncodeContext {
DECLARE_ALIGNED(16, SampleType, windowed_samples)[AC3_WINDOW_SIZE]; DECLARE_ALIGNED(16, SampleType, windowed_samples)[AC3_WINDOW_SIZE];
} AC3EncodeContext; } AC3EncodeContext;
typedef struct AC3Mant {
uint16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr; ///< mantissa pointers for bap=1,2,4
int mant1_cnt, mant2_cnt, mant4_cnt; ///< mantissa counts for bap=1,2,4
} AC3Mant;
#define CMIXLEV_NUM_OPTIONS 3 #define CMIXLEV_NUM_OPTIONS 3
static const float cmixlev_options[CMIXLEV_NUM_OPTIONS] = { static const float cmixlev_options[CMIXLEV_NUM_OPTIONS] = {
@ -1248,7 +1248,7 @@ static inline int asym_quant(int c, int e, int qbits)
/** /**
* Quantize a set of mantissas for a single channel in a single block. * Quantize a set of mantissas for a single channel in a single block.
*/ */
static void quantize_mantissas_blk_ch(AC3EncodeContext *s, int32_t *fixed_coef, static void quantize_mantissas_blk_ch(AC3Mant *s, int32_t *fixed_coef,
uint8_t *exp, uint8_t *exp,
uint8_t *bap, uint16_t *qmant, int n) uint8_t *bap, uint16_t *qmant, int n)
{ {
@ -1350,12 +1350,11 @@ static void quantize_mantissas(AC3EncodeContext *s)
for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) { for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
AC3Block *block = &s->blocks[blk]; AC3Block *block = &s->blocks[blk];
AC3Block *ref_block; AC3Block *ref_block;
s->mant1_cnt = s->mant2_cnt = s->mant4_cnt = 0; AC3Mant m = { 0 };
s->qmant1_ptr = s->qmant2_ptr = s->qmant4_ptr = NULL;
for (ch = 0; ch < s->channels; ch++) { for (ch = 0; ch < s->channels; ch++) {
ref_block = block->exp_ref_block[ch]; ref_block = block->exp_ref_block[ch];
quantize_mantissas_blk_ch(s, block->fixed_coef[ch], quantize_mantissas_blk_ch(&m, block->fixed_coef[ch],
ref_block->exp[ch], ref_block->bap[ch], ref_block->exp[ch], ref_block->bap[ch],
block->qmant[ch], s->nb_coefs[ch]); block->qmant[ch], s->nb_coefs[ch]);
} }