ed2a4a7941
This adds proper support for float samples in mixeng by adding a new audio format for it. Limitations: only native endianness is supported. None of the virtual sound cards support float samples (it looks like most of them only support 8 and 16 bit, only hda supports 32 bit), it is only used for the audio backends (i.e. host side). Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Acked-by: Markus Armbruster <armbru@redhat.com> Message-id: 8a8b0b5698401b78d3c4c8ec90aef83b95babb06.1580672076.git.DirtY.iCE.hu@gmail.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
59 lines
2.4 KiB
C
59 lines
2.4 KiB
C
/*
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* QEMU Mixing engine header
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*
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* Copyright (c) 2004-2005 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* 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 shall be included in
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* all copies or substantial portions of the 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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef QEMU_MIXENG_H
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#define QEMU_MIXENG_H
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#ifdef FLOAT_MIXENG
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typedef float mixeng_real;
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struct mixeng_volume { int mute; mixeng_real r; mixeng_real l; };
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struct st_sample { mixeng_real l; mixeng_real r; };
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#else
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struct mixeng_volume { int mute; int64_t r; int64_t l; };
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struct st_sample { int64_t l; int64_t r; };
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#endif
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typedef struct st_sample st_sample;
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typedef void (t_sample) (struct st_sample *dst, const void *src, int samples);
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typedef void (f_sample) (void *dst, const struct st_sample *src, int samples);
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/* indices: [stereo][signed][swap endiannes][8, 16 or 32-bits] */
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extern t_sample *mixeng_conv[2][2][2][3];
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extern f_sample *mixeng_clip[2][2][2][3];
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/* indices: [stereo] */
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extern t_sample *mixeng_conv_float[2];
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extern f_sample *mixeng_clip_float[2];
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void *st_rate_start (int inrate, int outrate);
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void st_rate_flow(void *opaque, st_sample *ibuf, st_sample *obuf,
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size_t *isamp, size_t *osamp);
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void st_rate_flow_mix(void *opaque, st_sample *ibuf, st_sample *obuf,
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size_t *isamp, size_t *osamp);
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void st_rate_stop (void *opaque);
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void mixeng_clear (struct st_sample *buf, int len);
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void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol);
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#endif /* QEMU_MIXENG_H */
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