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https://github.com/freebsd/freebsd-src.git
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Christos Margiolis
9cab9fde5e
This patch diverges quite a bit from the current upstream [1] in a few ways: 1. virtual_oss(8), virtual_bt_speaker(8) and virtual_oss_cmd(8) are actually separate programs. 2. Backends (lib/virtual_oss) are built as separate shared libraries and we dlopen() them in virtual_oss(8) and virtual_bt_speaker(8) on demand. 3. virtual_equalizer(8) and the sndio and bluetooth backends are built as ports, because they depend on third-party libraries. 4. Use newer libav API in bluetooth backend (see HAVE_LIBAV ifdefs) to address compiler errors. [1] https://github.com/freebsd/virtual_oss Sponsored by: The FreeBSD Foundation MFC after: 1 week Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D52308
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/*-
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* Copyright (c) 2015-2022 Hans Petter Selasky
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/queue.h>
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#include <sys/filio.h>
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#include <sys/soundcard.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <err.h>
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#include <time.h>
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#include "backend.h"
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#include "int.h"
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static void
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null_close(struct voss_backend *pbe __unused)
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{
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}
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static int
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null_open(struct voss_backend *pbe __unused, const char *devname __unused,
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int samplerate __unused, int bufsize __unused, int *pchannels __unused,
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int *pformat)
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{
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int value[3];
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int i;
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value[0] = *pformat & VPREFERRED_SNE_AFMT;
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value[1] = *pformat & VPREFERRED_SLE_AFMT;
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value[2] = *pformat & VPREFERRED_SBE_AFMT;
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for (i = 0; i != 3; i++) {
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if (value[i] == 0)
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continue;
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*pformat = value[i];
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return (0);
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}
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return (-1);
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}
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static int
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null_rec_transfer(struct voss_backend *pbe __unused, void *ptr, int len)
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{
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if (voss_has_synchronization == 0)
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virtual_oss_wait();
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memset(ptr, 0, len);
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return (len);
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}
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static int
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null_play_transfer(struct voss_backend *pbe __unused, void *ptr __unused,
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int len)
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{
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return (len);
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}
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static void
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null_delay(struct voss_backend *pbe __unused, int *pdelay)
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{
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*pdelay = -1;
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}
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struct voss_backend voss_backend_null_rec = {
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.open = null_open,
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.close = null_close,
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.transfer = null_rec_transfer,
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.delay = null_delay,
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};
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struct voss_backend voss_backend_null_play = {
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.open = null_open,
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.close = null_close,
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.transfer = null_play_transfer,
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.delay = null_delay,
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};
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