[FFmpeg-cvslog] r20078 - in trunk/libavcodec: wma.c wma.h wmaprodata.h wmaprodec.c
mru
subversion
Tue Sep 29 12:38:34 CEST 2009
Author: mru
Date: Tue Sep 29 12:38:34 2009
New Revision: 20078
Log:
WMA: store level_table as floats, use type punning for sign flip in decode
Modified:
trunk/libavcodec/wma.c
trunk/libavcodec/wma.h
trunk/libavcodec/wmaprodata.h
trunk/libavcodec/wmaprodec.c
Modified: trunk/libavcodec/wma.c
==============================================================================
--- trunk/libavcodec/wma.c Tue Sep 29 12:38:30 2009 (r20077)
+++ trunk/libavcodec/wma.c Tue Sep 29 12:38:34 2009 (r20078)
@@ -29,7 +29,7 @@
/* XXX: use same run/length optimization as mpeg decoders */
//FIXME maybe split decode / encode or pass flag
static void init_coef_vlc(VLC *vlc, uint16_t **prun_table,
- uint16_t **plevel_table, uint16_t **pint_table,
+ float **plevel_table, uint16_t **pint_table,
const CoefVLCTable *vlc_table)
{
int n = vlc_table->n;
@@ -37,12 +37,14 @@ static void init_coef_vlc(VLC *vlc, uint
const uint32_t *table_codes = vlc_table->huffcodes;
const uint16_t *levels_table = vlc_table->levels;
uint16_t *run_table, *level_table, *int_table;
+ float *flevel_table;
int i, l, j, k, level;
init_vlc(vlc, VLCBITS, n, table_bits, 1, 1, table_codes, 4, 4, 0);
run_table = av_malloc(n * sizeof(uint16_t));
level_table = av_malloc(n * sizeof(uint16_t));
+ flevel_table= av_malloc(n * sizeof(*flevel_table));
int_table = av_malloc(n * sizeof(uint16_t));
i = 2;
level = 1;
@@ -53,13 +55,15 @@ static void init_coef_vlc(VLC *vlc, uint
for (j = 0; j < l; j++) {
run_table[i] = j;
level_table[i] = level;
+ flevel_table[i]= level;
i++;
}
level++;
}
*prun_table = run_table;
- *plevel_table = level_table;
+ *plevel_table = flevel_table;
*pint_table = int_table;
+ av_free(level_table);
}
/**
@@ -465,19 +469,22 @@ unsigned int ff_wma_get_large_val(GetBit
*/
int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb,
VLC *vlc,
- const uint16_t *level_table, const uint16_t *run_table,
+ const float *level_table, const uint16_t *run_table,
int version, WMACoef *ptr, int offset,
int num_coefs, int block_len, int frame_len_bits,
int coef_nb_bits)
{
int code, level, sign;
+ const uint32_t *ilvl = (const uint32_t*)level_table;
+ uint32_t *iptr = (uint32_t*)ptr;
const unsigned int coef_mask = block_len - 1;
for (; offset < num_coefs; offset++) {
code = get_vlc2(gb, vlc->table, VLCBITS, VLCMAX);
if (code > 1) {
/** normal code */
offset += run_table[code];
- level = level_table[code];
+ sign = get_bits1(gb) - 1;
+ iptr[offset & coef_mask] = ilvl[code] ^ sign<<31;
} else if (code == 1) {
/** EOB */
break;
@@ -503,9 +510,9 @@ int ff_wma_run_level_decode(AVCodecConte
offset += get_bits(gb, 2) + 1;
}
}
+ sign = get_bits1(gb) - 1;
+ ptr[offset & coef_mask] = (level^sign) - sign;
}
- sign = get_bits1(gb) - 1;
- ptr[offset & coef_mask] = (level^sign) - sign;
}
/** NOTE: EOB can be omitted */
if (offset > num_coefs) {
Modified: trunk/libavcodec/wma.h
==============================================================================
--- trunk/libavcodec/wma.h Tue Sep 29 12:38:30 2009 (r20077)
+++ trunk/libavcodec/wma.h Tue Sep 29 12:38:34 2009 (r20078)
@@ -93,7 +93,7 @@ typedef struct WMACodecContext {
//FIXME the following 3 tables should be shared between decoders
VLC coef_vlc[2];
uint16_t *run_table[2];
- uint16_t *level_table[2];
+ float *level_table[2];
uint16_t *int_table[2];
const CoefVLCTable *coef_vlcs[2];
/* frame info */
@@ -153,7 +153,7 @@ int ff_wma_end(AVCodecContext *avctx);
unsigned int ff_wma_get_large_val(GetBitContext* gb);
int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb,
VLC *vlc,
- const uint16_t *level_table, const uint16_t *run_table,
+ const float *level_table, const uint16_t *run_table,
int version, WMACoef *ptr, int offset,
int num_coefs, int block_len, int frame_len_bits,
int coef_nb_bits);
Modified: trunk/libavcodec/wmaprodata.h
==============================================================================
--- trunk/libavcodec/wmaprodata.h Tue Sep 29 12:38:30 2009 (r20077)
+++ trunk/libavcodec/wmaprodata.h Tue Sep 29 12:38:34 2009 (r20078)
@@ -352,7 +352,7 @@ static const uint16_t coef0_run[HUFF_COE
1, 0, 1, 0, 1, 0,
};
-static const uint16_t coef0_level[HUFF_COEF0_SIZE] = {
+static const float coef0_level[HUFF_COEF0_SIZE] = {
0, 0, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
@@ -393,7 +393,7 @@ static const uint16_t coef1_run[HUFF_COE
1, 0, 1, 0, 1, 0, 1, 0, 0, 0,
};
-static const uint16_t coef1_level[HUFF_COEF1_SIZE] = {
+static const float coef1_level[HUFF_COEF1_SIZE] = {
0, 0, 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, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
Modified: trunk/libavcodec/wmaprodec.c
==============================================================================
--- trunk/libavcodec/wmaprodec.c Tue Sep 29 12:38:30 2009 (r20077)
+++ trunk/libavcodec/wmaprodec.c Tue Sep 29 12:38:34 2009 (r20078)
@@ -769,7 +769,7 @@ static int decode_coeffs(WMAProDecodeCtx
int cur_coeff = 0;
int num_zeros = 0;
const uint16_t* run;
- const uint16_t* level;
+ const float* level;
dprintf(s->avctx, "decode coefficients for channel %i\n", c);
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