Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

audio/noaudio.c

@@ -0,0 +1,145 @@
+/*
+ * 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/module.h"
+#include "qemu/audio.h"
+#include "qom/object.h"
+
+#include "audio_int.h"
+
+#define TYPE_AUDIO_NONE "audio-none"
+OBJECT_DECLARE_SIMPLE_TYPE(AudioNone, AUDIO_NONE)
+
+struct AudioNone {
+    AudioMixengBackend parent_obj;
+};
+
+typedef struct NoVoiceOut {
+    HWVoiceOut hw;
+    RateCtl rate;
+} NoVoiceOut;
+
+typedef struct NoVoiceIn {
+    HWVoiceIn hw;
+    RateCtl rate;
+} NoVoiceIn;
+
+static size_t no_write(HWVoiceOut *hw, void *buf, size_t len)
+{
+    NoVoiceOut *no = (NoVoiceOut *) hw;
+    return audio_rate_get_bytes(&no->rate, &hw->info, len);
+}
+
+static int no_init_out(HWVoiceOut *hw, struct audsettings *as)
+{
+    NoVoiceOut *no = (NoVoiceOut *) hw;
+
+    audio_pcm_init_info (&hw->info, as);
+    hw->samples = 1024;
+    audio_rate_start(&no->rate);
+    return 0;
+}
+
+static void no_fini_out (HWVoiceOut *hw)
+{
+    (void) hw;
+}
+
+static void no_enable_out(HWVoiceOut *hw, bool enable)
+{
+    NoVoiceOut *no = (NoVoiceOut *) hw;
+
+    if (enable) {
+        audio_rate_start(&no->rate);
+    }
+}
+
+static int no_init_in(HWVoiceIn *hw, struct audsettings *as)
+{
+    NoVoiceIn *no = (NoVoiceIn *) hw;
+
+    audio_pcm_init_info (&hw->info, as);
+    hw->samples = 1024;
+    audio_rate_start(&no->rate);
+    return 0;
+}
+
+static void no_fini_in (HWVoiceIn *hw)
+{
+    (void) hw;
+}
+
+static size_t no_read(HWVoiceIn *hw, void *buf, size_t size)
+{
+    NoVoiceIn *no = (NoVoiceIn *) hw;
+    int64_t bytes = audio_rate_get_bytes(&no->rate, &hw->info, size);
+
+    audio_pcm_info_clear_buf(&hw->info, buf, bytes / hw->info.bytes_per_frame);
+    return bytes;
+}
+
+static void no_enable_in(HWVoiceIn *hw, bool enable)
+{
+    NoVoiceIn *no = (NoVoiceIn *) hw;
+
+    if (enable) {
+        audio_rate_start(&no->rate);
+    }
+}
+
+static void audio_none_class_init(ObjectClass *klass, const void *data)
+{
+    AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_CLASS(klass);
+
+    k->max_voices_out = INT_MAX;
+    k->max_voices_in = INT_MAX;
+    k->voice_size_out = sizeof(NoVoiceOut);
+    k->voice_size_in = sizeof(NoVoiceIn);
+
+    k->init_out = no_init_out;
+    k->fini_out = no_fini_out;
+    k->write = no_write;
+    k->buffer_get_free = audio_generic_buffer_get_free;
+    k->run_buffer_out = audio_generic_run_buffer_out;
+    k->enable_out = no_enable_out;
+
+    k->init_in = no_init_in;
+    k->fini_in = no_fini_in;
+    k->read = no_read;
+    k->run_buffer_in = audio_generic_run_buffer_in;
+    k->enable_in = no_enable_in;
+}
+
+static const TypeInfo audio_types[] = {
+    {
+        .name = TYPE_AUDIO_NONE,
+        .parent = TYPE_AUDIO_MIXENG_BACKEND,
+        .instance_size = sizeof(AudioNone),
+        .class_init = audio_none_class_init,
+    },
+};
+
+DEFINE_TYPES(audio_types)
+module_obj(TYPE_AUDIO_NONE);