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audioquantize: make helper for add with saturation

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This commit is contained in:
Wim Taymans 2015-10-28 11:40:42 +01:00
parent 1da79c76a7
commit 26d469a04b
1 changed files with 11 additions and 18 deletions
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29
gst/audioconvert/gstaudioquantize.c
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@ -62,6 +62,14 @@ struct _GstAudioQuantize
#define MAKE_QUANTIZE_FUNC_NAME(name) \
gst_audio_quantize_quantize_##name
#define ADDSS(res,val) \
if (val > 0 && res > 0 && G_MAXINT32 - res <= val) \
res = G_MAXINT32; \
else if (val < 0 && res < 0 && G_MININT32 - res >= val) \
res = G_MININT32; \
else \
res += val;
/* Quantize functions for gint32 as intermediate format */
#define MAKE_QUANTIZE_FUNC_I(name, DITHER_INIT_FUNC, ADD_DITHER_FUNC, \
@ -162,12 +170,7 @@ MAKE_QUANTIZE_FUNC_NAME (name) (GstAudioQuantize *quant, gdouble *src, \
#define ADD_DITHER_RPDF_I() \
rand = bias + RANDOM_INT_DITHER(dither); \
if (rand > 0 && tmp > 0 && G_MAXINT32 - tmp <= rand) \
tmp = G_MAXINT32; \
else if (rand < 0 && tmp < 0 && G_MININT32 - tmp >= rand) \
tmp = G_MININT32; \
else \
tmp += rand;
ADDSS (tmp, rand);
#define INIT_DITHER_RPDF_F() \
gdouble dither = 1.0/(1U<<(32 - scale - 1));
@ -182,12 +185,7 @@ MAKE_QUANTIZE_FUNC_NAME (name) (GstAudioQuantize *quant, gdouble *src, \
#define ADD_DITHER_TPDF_I() \
rand = bias + RANDOM_INT_DITHER(dither) \
+ RANDOM_INT_DITHER(dither); \
if (rand > 0 && tmp > 0 && G_MAXINT32 - tmp <= rand) \
tmp = G_MAXINT32; \
else if (rand < 0 && tmp < 0 && G_MININT32 - tmp >= rand) \
tmp = G_MININT32; \
else \
tmp += rand;
ADDSS (tmp, rand);
#define INIT_DITHER_TPDF_F() \
gdouble dither = 1.0/(1U<<(32 - scale));
@ -205,12 +203,7 @@ MAKE_QUANTIZE_FUNC_NAME (name) (GstAudioQuantize *quant, gdouble *src, \
tmp_rand = RANDOM_INT_DITHER(dither); \
rand = bias + tmp_rand - last_random[chan_pos]; \
last_random[chan_pos] = tmp_rand; \
if (rand > 0 && tmp > 0 && G_MAXINT32 - tmp <= rand) \
tmp = G_MAXINT32; \
else if (rand < 0 && tmp < 0 && G_MININT32 - tmp >= rand) \
tmp = G_MININT32; \
else \
tmp += rand;
ADDSS (tmp, rand);
/* Like TPDF dither but the dither noise is oriented more to the
* higher frequencies */