From bc11e713063f3f96f98256abc81c0d8ee1ddb312 Mon Sep 17 00:00:00 2001
From: Marco Nelissen <marcone@google.com>
Date: Thu, 8 Jan 2015 12:26:36 -0800
Subject: Use callbacks for Midi I/O

Instead of having the Sonivox engine directly open the file and
use stdio to read from it, use caller-provided callbacks.

Change-Id: Ie55129109060a4a7862fee3177f994401e00b6c1
---
 include/media/JetPlayer.h     |  5 ++---
 include/media/MidiIoWrapper.h | 46 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 3 deletions(-)
 create mode 100644 include/media/MidiIoWrapper.h

(limited to 'include')

diff --git a/include/media/JetPlayer.h b/include/media/JetPlayer.h
index 388f767..63d1980 100644
--- a/include/media/JetPlayer.h
+++ b/include/media/JetPlayer.h
@@ -22,6 +22,7 @@
 #include <libsonivox/jet.h>
 #include <libsonivox/eas_types.h>
 #include <media/AudioTrack.h>
+#include <media/MidiIoWrapper.h>
 
 
 namespace android {
@@ -86,15 +87,13 @@ private:
 
     int                 mMaxTracks; // max number of MIDI tracks, usually 32
     EAS_DATA_HANDLE     mEasData;
-    EAS_FILE_LOCATOR    mEasJetFileLoc;
+    sp<MidiIoWrapper>   mIoWrapper;
     EAS_PCM*            mAudioBuffer;// EAS renders the MIDI data into this buffer,
     sp<AudioTrack>      mAudioTrack; // and we play it in this audio track
     int                 mTrackBufferSize;
     S_JET_STATUS        mJetStatus;
     S_JET_STATUS        mPreviousJetStatus;
 
-    char                mJetFilePath[PATH_MAX];
-
     class JetPlayerThread : public Thread {
     public:
         JetPlayerThread(JetPlayer *player) : mPlayer(player) {
diff --git a/include/media/MidiIoWrapper.h b/include/media/MidiIoWrapper.h
new file mode 100644
index 0000000..caf1d75
--- /dev/null
+++ b/include/media/MidiIoWrapper.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2014 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 MIDI_IO_WRAPPER_H_
+#define MIDI_IO_WRAPPER_H_
+
+#include <libsonivox/eas_types.h>
+
+namespace android {
+
+class MidiIoWrapper : public RefBase {
+public:
+    MidiIoWrapper(const char *path);
+    MidiIoWrapper(int fd, off64_t offset, int64_t size);
+
+    ~MidiIoWrapper();
+
+    int readAt(void *buffer, int offset, int size);
+    int size();
+
+    EAS_FILE_LOCATOR getLocator();
+
+private:
+    int mFd;
+    off64_t mBase;
+    int64_t  mLength;
+    EAS_FILE mEasFile;
+};
+
+
+}  // namespace android
+
+#endif // MIDI_IO_WRAPPER_H_
-- 
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