diff options
Diffstat (limited to 'qemu/audio/noaudio.c')
| -rw-r--r-- | qemu/audio/noaudio.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/qemu/audio/noaudio.c b/qemu/audio/noaudio.c deleted file mode 100644 index b360c199a..000000000 --- a/qemu/audio/noaudio.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * QEMU Timer based audio emulation - * - * Copyright (c) 2004-2005 Vassili Karpov (malc) - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "qemu/osdep.h" -#include "qemu-common.h" -#include "audio.h" -#include "qemu/timer.h" - -#define AUDIO_CAP "noaudio" -#include "audio_int.h" - -typedef struct NoVoiceOut { - HWVoiceOut hw; - int64_t old_ticks; -} NoVoiceOut; - -typedef struct NoVoiceIn { - HWVoiceIn hw; - int64_t old_ticks; -} NoVoiceIn; - -static int no_run_out (HWVoiceOut *hw, int live) -{ - NoVoiceOut *no = (NoVoiceOut *) hw; - int decr, samples; - int64_t now; - int64_t ticks; - int64_t bytes; - - now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - ticks = now - no->old_ticks; - bytes = muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); - bytes = audio_MIN(bytes, INT_MAX); - samples = bytes >> hw->info.shift; - - no->old_ticks = now; - decr = audio_MIN (live, samples); - hw->rpos = (hw->rpos + decr) % hw->samples; - return decr; -} - -static int no_write (SWVoiceOut *sw, void *buf, int len) -{ - return audio_pcm_sw_write(sw, buf, len); -} - -static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque) -{ - audio_pcm_init_info (&hw->info, as); - hw->samples = 1024; - return 0; -} - -static void no_fini_out (HWVoiceOut *hw) -{ - (void) hw; -} - -static int no_ctl_out (HWVoiceOut *hw, int cmd, ...) -{ - (void) hw; - (void) cmd; - return 0; -} - -static int no_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque) -{ - audio_pcm_init_info (&hw->info, as); - hw->samples = 1024; - return 0; -} - -static void no_fini_in (HWVoiceIn *hw) -{ - (void) hw; -} - -static int no_run_in (HWVoiceIn *hw) -{ - NoVoiceIn *no = (NoVoiceIn *) hw; - int live = audio_pcm_hw_get_live_in (hw); - int dead = hw->samples - live; - int samples = 0; - - if (dead) { - int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - int64_t ticks = now - no->old_ticks; - int64_t bytes = - muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); - - no->old_ticks = now; - bytes = audio_MIN (bytes, INT_MAX); - samples = bytes >> hw->info.shift; - samples = audio_MIN (samples, dead); - } - return samples; -} - -static int no_read (SWVoiceIn *sw, void *buf, int size) -{ - /* use custom code here instead of audio_pcm_sw_read() to avoid - * useless resampling/mixing */ - int samples = size >> sw->info.shift; - int total = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; - int to_clear = audio_MIN (samples, total); - sw->total_hw_samples_acquired += total; - audio_pcm_info_clear_buf (&sw->info, buf, to_clear); - return to_clear << sw->info.shift; -} - -static int no_ctl_in (HWVoiceIn *hw, int cmd, ...) -{ - (void) hw; - (void) cmd; - return 0; -} - -static void *no_audio_init (void) -{ - return &no_audio_init; -} - -static void no_audio_fini (void *opaque) -{ - (void) opaque; -} - -static struct audio_pcm_ops no_pcm_ops = { - .init_out = no_init_out, - .fini_out = no_fini_out, - .run_out = no_run_out, - .write = no_write, - .ctl_out = no_ctl_out, - - .init_in = no_init_in, - .fini_in = no_fini_in, - .run_in = no_run_in, - .read = no_read, - .ctl_in = no_ctl_in -}; - -struct audio_driver no_audio_driver = { - .name = "none", - .descr = "Timer based audio emulation", - .options = NULL, - .init = no_audio_init, - .fini = no_audio_fini, - .pcm_ops = &no_pcm_ops, - .can_be_default = 1, - .max_voices_out = INT_MAX, - .max_voices_in = INT_MAX, - .voice_size_out = sizeof (NoVoiceOut), - .voice_size_in = sizeof (NoVoiceIn) -}; |