Transcoder: Added MediaTrackTranscoder and VideoTrackTranscoder
A track transcoder transcodes samples from a single track of a media file.
MediaTrackTranscoder is the base class for all track transcoder, and
VideoTrackTranscoder is a concrete implementation for video tracks.
Test: Unit test.
Bug: 152091443
Change-Id: I7980a3cda40229004b6bca5212d3e903f19a3017
diff --git a/media/libmediatranscoding/transcoder/tests/TrackTranscoderTestUtils.h b/media/libmediatranscoding/transcoder/tests/TrackTranscoderTestUtils.h
new file mode 100644
index 0000000..6b9131c
--- /dev/null
+++ b/media/libmediatranscoding/transcoder/tests/TrackTranscoderTestUtils.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2020 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/MediaTrackTranscoder.h>
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+
+namespace android {
+
+//
+// This file contains test utilities used by more than one track transcoder test.
+//
+
+class TrackTranscoderTestUtils {
+public:
+ static std::shared_ptr<AMediaFormat> getDefaultVideoDestinationFormat(
+ AMediaFormat* sourceFormat) {
+ // Default video destination format setup.
+ static constexpr float kFrameRate = 30.0f;
+ static constexpr float kIFrameInterval = 30.0f;
+ static constexpr int32_t kBitRate = 2 * 1000 * 1000;
+ static constexpr int32_t kColorFormatSurface = 0x7f000789;
+
+ AMediaFormat* destinationFormat = AMediaFormat_new();
+ AMediaFormat_copy(destinationFormat, sourceFormat);
+ AMediaFormat_setFloat(destinationFormat, AMEDIAFORMAT_KEY_FRAME_RATE, kFrameRate);
+ AMediaFormat_setFloat(destinationFormat, AMEDIAFORMAT_KEY_I_FRAME_INTERVAL,
+ kIFrameInterval);
+ AMediaFormat_setInt32(destinationFormat, AMEDIAFORMAT_KEY_BIT_RATE, kBitRate);
+ AMediaFormat_setInt32(destinationFormat, AMEDIAFORMAT_KEY_COLOR_FORMAT,
+ kColorFormatSurface);
+
+ return std::shared_ptr<AMediaFormat>(destinationFormat,
+ std::bind(AMediaFormat_delete, std::placeholders::_1));
+ }
+};
+
+class TestCallback : public MediaTrackTranscoderCallback {
+public:
+ TestCallback() = default;
+ ~TestCallback() = default;
+
+ // MediaTrackTranscoderCallback
+ void onTrackFinished(MediaTrackTranscoder* transcoder __unused) {
+ std::unique_lock<std::mutex> lock(mMutex);
+ mTranscodingFinished = true;
+ mCv.notify_all();
+ }
+
+ void onTrackError(MediaTrackTranscoder* transcoder __unused, media_status_t status) {
+ std::unique_lock<std::mutex> lock(mMutex);
+ mTranscodingFinished = true;
+ mStatus = status;
+ mCv.notify_all();
+ }
+ // ~MediaTrackTranscoderCallback
+
+ media_status_t waitUntilFinished() {
+ std::unique_lock<std::mutex> lock(mMutex);
+ while (!mTranscodingFinished) {
+ mCv.wait(lock);
+ }
+ return mStatus;
+ }
+
+private:
+ media_status_t mStatus = AMEDIA_OK;
+ std::mutex mMutex;
+ std::condition_variable mCv;
+ bool mTranscodingFinished = false;
+};
+
+}; // namespace android