/*
- * QEMU NULL audio output driver
- *
- * Copyright (c) 2004 Vassili Karpov (malc)
- *
+ * 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
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include "vl.h"
+#include "qemu-common.h"
+#include "audio.h"
+#include "qemu-timer.h"
-#include "audio/audio_int.h"
+#define AUDIO_CAP "noaudio"
+#include "audio_int.h"
-typedef struct NoVoice {
- HWVoice hw;
+typedef struct NoVoiceOut {
+ HWVoiceOut hw;
int64_t old_ticks;
-} NoVoice;
+} NoVoiceOut;
-#define dolog(...) AUD_log ("noaudio", __VA_ARGS__)
-#ifdef DEBUG
-#define ldebug(...) dolog (__VA_ARGS__)
-#else
-#define ldebug(...)
-#endif
+typedef struct NoVoiceIn {
+ HWVoiceIn hw;
+ int64_t old_ticks;
+} NoVoiceIn;
-static void no_hw_run (HWVoice *hw)
+static int no_run_out (HWVoiceOut *hw)
{
- NoVoice *no = (NoVoice *) hw;
- int rpos, live, decr, samples;
- uint8_t *dst;
- st_sample_t *src;
- int64_t now = qemu_get_clock (vm_clock);
- int64_t ticks = now - no->old_ticks;
- int64_t bytes = (ticks * hw->bytes_per_second) / ticks_per_sec;
-
- if (bytes > INT_MAX)
- samples = INT_MAX >> hw->shift;
- else
- samples = bytes >> hw->shift;
-
- live = pcm_hw_get_live (hw);
- if (live <= 0)
- return;
+ NoVoiceOut *no = (NoVoiceOut *) hw;
+ int live, decr, samples;
+ int64_t now;
+ int64_t ticks;
+ int64_t bytes;
+
+ live = audio_pcm_hw_get_live_out (&no->hw);
+ if (!live) {
+ return 0;
+ }
+
+ now = qemu_get_clock (vm_clock);
+ ticks = now - no->old_ticks;
+ bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
+ bytes = audio_MIN (bytes, INT_MAX);
+ samples = bytes >> hw->info.shift;
no->old_ticks = now;
decr = audio_MIN (live, samples);
- samples = decr;
- rpos = hw->rpos;
- while (samples) {
- int left_till_end_samples = hw->samples - rpos;
- int convert_samples = audio_MIN (samples, left_till_end_samples);
+ hw->rpos = (hw->rpos + decr) % hw->samples;
+ return decr;
+}
- src = advance (hw->mix_buf, rpos * sizeof (st_sample_t));
- memset (src, 0, convert_samples * sizeof (st_sample_t));
+static int no_write (SWVoiceOut *sw, void *buf, int len)
+{
+ return audio_pcm_sw_write (sw, buf, len);
+}
- rpos = (rpos + convert_samples) % hw->samples;
- samples -= convert_samples;
- }
+static int no_init_out (HWVoiceOut *hw, audsettings_t *as)
+{
+ audio_pcm_init_info (&hw->info, as);
+ hw->samples = 1024;
+ return 0;
+}
- pcm_hw_dec_live (hw, decr);
- hw->rpos = rpos;
+static void no_fini_out (HWVoiceOut *hw)
+{
+ (void) hw;
}
-static int no_hw_write (SWVoice *sw, void *buf, int len)
+static int no_ctl_out (HWVoiceOut *hw, int cmd, ...)
{
- return pcm_hw_write (sw, buf, len);
+ (void) hw;
+ (void) cmd;
+ return 0;
}
-static int no_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt)
+static int no_init_in (HWVoiceIn *hw, audsettings_t *as)
{
- NoVoice *no = (NoVoice *) hw;
- hw->freq = freq;
- hw->nchannels = nchannels;
- hw->fmt = fmt;
- hw->bufsize = 4096;
+ audio_pcm_init_info (&hw->info, as);
+ hw->samples = 1024;
return 0;
}
-static void no_hw_fini (HWVoice *hw)
+static void no_fini_in (HWVoiceIn *hw)
{
(void) hw;
}
-static int no_hw_ctl (HWVoice *hw, int cmd, ...)
+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_get_clock (vm_clock);
+ int64_t ticks = now - no->old_ticks;
+ int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
+
+ 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)
+{
+ 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);
+ audio_pcm_info_clear_buf (&sw->info, buf, to_clear);
+ return to_clear;
+}
+
+static int no_ctl_in (HWVoiceIn *hw, int cmd, ...)
{
(void) hw;
(void) cmd;
static void no_audio_fini (void *opaque)
{
+ (void) opaque;
}
-struct pcm_ops no_pcm_ops = {
- no_hw_init,
- no_hw_fini,
- no_hw_run,
- no_hw_write,
- no_hw_ctl
+static struct audio_pcm_ops no_pcm_ops = {
+ no_init_out,
+ no_fini_out,
+ no_run_out,
+ no_write,
+ no_ctl_out,
+
+ no_init_in,
+ no_fini_in,
+ no_run_in,
+ no_read,
+ no_ctl_in
};
-struct audio_output_driver no_output_driver = {
- "none",
- no_audio_init,
- no_audio_fini,
- &no_pcm_ops,
- 1,
- 1,
- sizeof (NoVoice)
+struct audio_driver no_audio_driver = {
+ INIT_FIELD (name = ) "none",
+ INIT_FIELD (descr = ) "Timer based audio emulation",
+ INIT_FIELD (options = ) NULL,
+ INIT_FIELD (init = ) no_audio_init,
+ INIT_FIELD (fini = ) no_audio_fini,
+ INIT_FIELD (pcm_ops = ) &no_pcm_ops,
+ INIT_FIELD (can_be_default = ) 1,
+ INIT_FIELD (max_voices_out = ) INT_MAX,
+ INIT_FIELD (max_voices_in = ) INT_MAX,
+ INIT_FIELD (voice_size_out = ) sizeof (NoVoiceOut),
+ INIT_FIELD (voice_size_in = ) sizeof (NoVoiceIn)
};
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