summaryrefslogtreecommitdiffstats
path: root/include/private/media/AudioTrackShared.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/private/media/AudioTrackShared.h')
-rw-r--r--include/private/media/AudioTrackShared.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h
new file mode 100644
index 0000000..1878f3c
--- /dev/null
+++ b/include/private/media/AudioTrackShared.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_AUDIO_TRACK_SHARED_H
+#define ANDROID_AUDIO_TRACK_SHARED_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/threads.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+#define MAX_SAMPLE_RATE 65535
+#define THREAD_PRIORITY_AUDIO_CLIENT (ANDROID_PRIORITY_AUDIO)
+
+struct audio_track_cblk_t
+{
+ enum {
+ SEQUENCE_MASK = 0xFFFFFF00,
+ BUFFER_MASK = 0x000000FF
+ };
+
+ Mutex lock;
+ Condition cv;
+ volatile uint32_t user;
+ volatile uint32_t server;
+ volatile union {
+ uint16_t volume[2];
+ uint32_t volumeLR;
+ };
+ uint16_t sampleRate;
+ uint16_t reserved;
+
+ void* buffers;
+ size_t size;
+
+ audio_track_cblk_t();
+ uint32_t stepUser(int bufferCount);
+ bool stepServer(int bufferCount);
+ void* buffer(int id) const;
+};
+
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_AUDIO_TRACK_SHARED_H