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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5cf367ae57
Rewrite audioconvert to try to make it more clear what steps are executed during conversion. Add passthrough step that just does a memcpy when possible. Add ORC optimized dither and quantization functions. Implement noise-shaping on S32 samples only and allow for arbitrary noise shaping coefficients if we want this later.
36 lines
625 B
Text
36 lines
625 B
Text
.function audio_convert_orc_s32_to_double
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.dest 8 d1 gdouble
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.source 4 s1 gint32
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.temp 8 t1
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convld t1, s1
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divd d1, t1, 0x41DFFFFFFFC00000L
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.function audio_convert_orc_double_to_s32
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.dest 4 d1 gint32
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.source 8 s1 gdouble
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.temp 8 t1
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muld t1, s1, 0x41DFFFFFFFC00000L
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convdl d1, t1
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.function audio_convert_orc_int_bias
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.dest 4 d1 gint32
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.source 4 s1 gint32
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.param 4 bias gint32
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.param 4 mask gint32
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.temp 4 t1
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addssl t1, s1, bias
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andl d1, t1, mask
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.function audio_convert_orc_int_dither
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.dest 4 d1 gint32
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.source 4 s1 gint32
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.source 4 dither gint32
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.param 4 mask gint32
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.temp 4 t1
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addssl t1, s1, dither
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andl d1, t1, mask
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