Implement OmxJpegImageDecoder.

Add StreamSource, which wraps a SkStream to a DataSource.
Add SkOmxPixelRef, which holds a MediaBuffer.
Test OmxJpegImageDecoder by a Jpeg decoder bench.

1 files changed, 53 insertions, 0 deletions

diff --git a/media/tests/omxjpegdecoder/StreamSource.cpp b/media/tests/omxjpegdecoder/StreamSource.cpp
new file mode 100644
index 0000000..3ca5857
--- /dev/null
+++ b/media/tests/omxjpegdecoder/StreamSource.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+#include <media/stagefright/MediaDebug.h>
+
+#include "StreamSource.h"
+
+namespace android {
+
+StreamSource::StreamSource(SkStream *stream)
+        : mStream(stream) {
+    CHECK(stream != NULL);
+    mSize = stream->getLength();
+}
+
+StreamSource::~StreamSource() {
+    delete mStream;
+    mStream = NULL;
+}
+
+status_t StreamSource::InitCheck() const {
+    return mStream != NULL ? OK : NO_INIT;
+}
+
+ssize_t StreamSource::read_at(off_t offset, void *data, size_t size) {
+    Mutex::Autolock autoLock(mLock);
+
+    mStream->rewind();
+    mStream->skip(offset);
+    ssize_t result = mStream->read(data, size);
+
+    return result;
+}
+
+status_t StreamSource::getSize(off_t *size) {
+      *size = mSize;
+      return OK;
+}
+
+}  // namespace android