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mpegvideo: Remove commented-out PARANOID debug cruft

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This commit is contained in:
Diego Biurrun 2013-05-15 15:17:08 +02:00
parent d46c588f3c
commit 004b81c465
3 changed files with 0 additions and 37 deletions
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4
libavcodec/mpegvideo.c
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@ -59,10 +59,6 @@ static void dct_unquantize_h263_intra_c(MpegEncContext *s,
static void dct_unquantize_h263_inter_c(MpegEncContext *s,
int16_t *block, int n, int qscale);
/* enable all paranoid tests for rounding, overflows, etc... */
//#define PARANOID
//#define DEBUG

3
libavcodec/mpegvideo_enc.c
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@ -60,9 +60,6 @@ static int sse_mb(MpegEncContext *s);
static void denoise_dct_c(MpegEncContext *s, int16_t *block);
static int dct_quantize_trellis_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
/* enable all paranoid tests for rounding, overflows, etc... */
//#define PARANOID
//#define DEBUG
static uint8_t default_mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];

30
libavcodec/x86/mpegvideo.c
View File

@ -164,36 +164,6 @@ __asm__ volatile(
);
}
/*
NK:
Note: looking at PARANOID:
"enable all paranoid tests for rounding, overflows, etc..."
#ifdef PARANOID
if (level < -2048 || level > 2047)
fprintf(stderr, "unquant error %d %d\n", i, level);
#endif
We can suppose that result of two multiplications can't be greater than 0xFFFF
i.e. is 16-bit, so we use here only PMULLW instruction and can avoid
a complex multiplication.
=====================================================
Full formula for multiplication of 2 integer numbers
which are represent as high:low words:
input: value1 = high1:low1
value2 = high2:low2
output: value3 = value1*value2
value3=high3:low3 (on overflow: modulus 2^32 wrap-around)
this mean that for 0x123456 * 0x123456 correct result is 0x766cb0ce4
but this algorithm will compute only 0x66cb0ce4
this limited by 16-bit size of operands
---------------------------------
tlow1 = high1*low2
tlow2 = high2*low1
tlow1 = tlow1 + tlow2
high3:low3 = low1*low2
high3 += tlow1
*/
static void dct_unquantize_mpeg1_intra_mmx(MpegEncContext *s,
int16_t *block, int n, int qscale)
{