mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* Spa
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*
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* Copyright © 2022 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <spa/utils/defs.h>
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#include <spa/utils/string.h>
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#include <spa/param/audio/raw.h>
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struct dither {
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uint32_t intensity;
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#define DITHER_METHOD_NONE 0
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#define DITHER_METHOD_RECTANGULAR 2
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#define DITHER_METHOD_TRIANGULAR 3
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#define DITHER_METHOD_SHAPED_5 4
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uint32_t method;
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uint32_t n_channels;
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uint32_t cpu_flags;
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struct spa_log *log;
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void (*process) (struct dither *d, void * SPA_RESTRICT dst[],
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const void * SPA_RESTRICT src[], uint32_t n_samples);
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void (*free) (struct dither *d);
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uint32_t random[16];
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float *dither;
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uint32_t dither_size;
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float scale;
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};
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int dither_init(struct dither *d);
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static const struct dither_method_info {
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const char *label;
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const char *description;
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uint32_t method;
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} dither_method_info[] = {
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[DITHER_METHOD_NONE] = { "none", "Disabled", DITHER_METHOD_NONE },
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[DITHER_METHOD_RECTANGULAR] = { "rectangular", "Rectangular dithering", DITHER_METHOD_RECTANGULAR },
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[DITHER_METHOD_TRIANGULAR] = { "triangular", "Triangular dithering", DITHER_METHOD_TRIANGULAR },
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[DITHER_METHOD_SHAPED_5] = { "shaped5", "Shaped 5 dithering", DITHER_METHOD_SHAPED_5 }
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};
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static inline uint32_t dither_method_from_label(const char *label)
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{
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uint32_t i;
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for (i = 0; i < SPA_N_ELEMENTS(dither_method_info); i++) {
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if (spa_streq(dither_method_info[i].label, label))
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return dither_method_info[i].method;
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}
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return DITHER_METHOD_NONE;
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}
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#define dither_process(d,...) (d)->process(d, __VA_ARGS__)
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#define dither_free(d) (d)->free(d)
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#define DEFINE_FUNCTION(name,arch) \
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void dither_##name##_##arch(struct dither *d, \
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void * SPA_RESTRICT dst[], \
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const void * SPA_RESTRICT src[], \
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uint32_t n_samples);
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#define DITHER_OPS_MAX_ALIGN 16
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DEFINE_FUNCTION(f32, c);
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#if defined(HAVE_SSE2)
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DEFINE_FUNCTION(f32, sse2);
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#endif
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#undef DEFINE_FUNCTION
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