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87776ab72b
Move it to the actual users. There are some inclusions of qemu/host-utils.h in headers, but they are all necessary. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
176 lines
4.7 KiB
C
176 lines
4.7 KiB
C
/*
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* QEMU Timer based audio emulation
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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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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qemu/host-utils.h"
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#include "audio.h"
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#include "qemu/timer.h"
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#define AUDIO_CAP "noaudio"
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#include "audio_int.h"
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typedef struct NoVoiceOut {
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HWVoiceOut hw;
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int64_t old_ticks;
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} NoVoiceOut;
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typedef struct NoVoiceIn {
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HWVoiceIn hw;
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int64_t old_ticks;
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} NoVoiceIn;
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static int no_run_out (HWVoiceOut *hw, int live)
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{
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NoVoiceOut *no = (NoVoiceOut *) hw;
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int decr, samples;
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int64_t now;
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int64_t ticks;
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int64_t bytes;
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now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
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ticks = now - no->old_ticks;
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bytes = muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
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bytes = audio_MIN(bytes, INT_MAX);
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samples = bytes >> hw->info.shift;
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no->old_ticks = now;
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decr = audio_MIN (live, samples);
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hw->rpos = (hw->rpos + decr) % hw->samples;
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return decr;
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}
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static int no_write (SWVoiceOut *sw, void *buf, int len)
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{
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return audio_pcm_sw_write(sw, buf, len);
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}
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static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)
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{
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audio_pcm_init_info (&hw->info, as);
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hw->samples = 1024;
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return 0;
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}
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static void no_fini_out (HWVoiceOut *hw)
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{
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(void) hw;
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}
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static int no_ctl_out (HWVoiceOut *hw, int cmd, ...)
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{
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(void) hw;
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(void) cmd;
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return 0;
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}
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static int no_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
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{
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audio_pcm_init_info (&hw->info, as);
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hw->samples = 1024;
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return 0;
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}
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static void no_fini_in (HWVoiceIn *hw)
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{
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(void) hw;
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}
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static int no_run_in (HWVoiceIn *hw)
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{
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NoVoiceIn *no = (NoVoiceIn *) hw;
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int live = audio_pcm_hw_get_live_in (hw);
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int dead = hw->samples - live;
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int samples = 0;
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if (dead) {
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int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
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int64_t ticks = now - no->old_ticks;
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int64_t bytes =
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muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
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no->old_ticks = now;
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bytes = audio_MIN (bytes, INT_MAX);
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samples = bytes >> hw->info.shift;
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samples = audio_MIN (samples, dead);
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}
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return samples;
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}
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static int no_read (SWVoiceIn *sw, void *buf, int size)
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{
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/* use custom code here instead of audio_pcm_sw_read() to avoid
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* useless resampling/mixing */
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int samples = size >> sw->info.shift;
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int total = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
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int to_clear = audio_MIN (samples, total);
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sw->total_hw_samples_acquired += total;
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audio_pcm_info_clear_buf (&sw->info, buf, to_clear);
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return to_clear << sw->info.shift;
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}
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static int no_ctl_in (HWVoiceIn *hw, int cmd, ...)
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{
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(void) hw;
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(void) cmd;
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return 0;
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}
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static void *no_audio_init (void)
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{
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return &no_audio_init;
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}
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static void no_audio_fini (void *opaque)
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{
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(void) opaque;
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}
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static struct audio_pcm_ops no_pcm_ops = {
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.init_out = no_init_out,
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.fini_out = no_fini_out,
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.run_out = no_run_out,
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.write = no_write,
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.ctl_out = no_ctl_out,
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.init_in = no_init_in,
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.fini_in = no_fini_in,
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.run_in = no_run_in,
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.read = no_read,
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.ctl_in = no_ctl_in
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};
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struct audio_driver no_audio_driver = {
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.name = "none",
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.descr = "Timer based audio emulation",
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.options = NULL,
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.init = no_audio_init,
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.fini = no_audio_fini,
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.pcm_ops = &no_pcm_ops,
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.can_be_default = 1,
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.max_voices_out = INT_MAX,
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.max_voices_in = INT_MAX,
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.voice_size_out = sizeof (NoVoiceOut),
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.voice_size_in = sizeof (NoVoiceIn)
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};
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