diff options
| -rw-r--r-- | libavcodec/mpegvideo.c | 4 | ||||
| -rw-r--r-- | libavcodec/mpegvideo_enc.c | 3 | ||||
| -rw-r--r-- | libavcodec/x86/mpegvideo.c | 30 |
3 files changed, 0 insertions, 37 deletions
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index 2ab3294..a52d04a 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -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 diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c index b2078e9..24b775e 100644 --- a/libavcodec/mpegvideo_enc.c +++ b/libavcodec/mpegvideo_enc.c @@ -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]; diff --git a/libavcodec/x86/mpegvideo.c b/libavcodec/x86/mpegvideo.c index 55cff74..68f3b62 100644 --- a/libavcodec/x86/mpegvideo.c +++ b/libavcodec/x86/mpegvideo.c @@ -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) { |
