Add qemu 2.4.0

[kvmfornfv.git] / qemu / audio / noaudio.c

diff --git a/qemu/audio/noaudio.c b/qemu/audio/noaudio.c
new file mode 100644 (file)
index 0000000..50db1f3
--- /dev/null
+++ b/qemu/audio/noaudio.c
@@ -0,0 +1,173 @@
+/*
+ * 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-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, get_ticks_per_sec ());
+    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, get_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)
+{
+    /* 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)
+};