Refactor MediaCodecBridge to add support for NDK APIs

media/base/android/sdk_media_codec_bridge.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_BASE_ANDROID_SDK_MEDIA_CODEC_BRIDGE_H_
+#define MEDIA_BASE_ANDROID_SDK_MEDIA_CODEC_BRIDGE_H_
+
+#include <jni.h>
+#include <set>
+#include <string>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "media/base/android/media_codec_bridge.h"
+#include "media/base/audio_decoder_config.h"
+#include "media/base/media_export.h"
+#include "media/base/video_decoder_config.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace media {
+
+// This class implements MediaCodecBridge using android MediaCodec SDK APIs.
+class MEDIA_EXPORT SdkMediaCodecBridge : public MediaCodecBridge {
+ public:
+  ~SdkMediaCodecBridge() override;
+
+  // MediaCodecBridge implementations.
+  MediaCodecStatus Reset() override;
+  bool Start() override;
+  void Stop() override;
+  void GetOutputFormat(int* width, int* height) override;
+  int GetOutputSamplingRate() override;
+  MediaCodecStatus QueueInputBuffer(
+      int index,
+      const uint8* data,
+      size_t data_size,
+      const base::TimeDelta& presentation_time) override;
+  using MediaCodecBridge::QueueSecureInputBuffer;
+  MediaCodecStatus QueueSecureInputBuffer(
+      int index,
+      const uint8* data,
+      size_t data_size,
+      std::vector<char> key_id,
+      std::vector<char> iv,
+      const SubsampleEntry* subsamples,
+      int subsamples_size,
+      const base::TimeDelta& presentation_time) override;
+  void QueueEOS(int input_buffer_index) override;
+  MediaCodecStatus DequeueInputBuffer(const base::TimeDelta& timeout,
+                                      int* index) override;
+  MediaCodecStatus DequeueOutputBuffer(const base::TimeDelta& timeout,
+                                       int* index,
+                                       size_t* offset,
+                                       size_t* size,
+                                       base::TimeDelta* presentation_time,
+                                       bool* end_of_stream,
+                                       bool* key_frame) override;
+  void ReleaseOutputBuffer(int index, bool render) override;
+  int GetOutputBuffersCount() override;
+  size_t GetOutputBuffersCapacity() override;
+  void GetInputBuffer(int input_buffer_index,
+                      uint8** data,
+                      size_t* capacity) override;
+  bool CopyFromOutputBuffer(int index,
+                            size_t offset,
+                            void* dst,
+                            int dst_size) override;
+
+  static bool RegisterSdkMediaCodecBridge(JNIEnv* env);
+
+ protected:
+  SdkMediaCodecBridge(const std::string& mime,
+                      bool is_secure,
+                      MediaCodecDirection direction);
+
+  // Called to get the buffer address given the output buffer index and offset.
+  // This function returns the size of the output and |addr| is the pointer to
+  // the address to read.
+  int GetOutputBufferAddress(int index, size_t offset, void** addr);
+
+  jobject media_codec() { return j_media_codec_.obj(); }
+  MediaCodecDirection direction_;
+
+ private:
+  // Java MediaCodec instance.
+  base::android::ScopedJavaGlobalRef<jobject> j_media_codec_;
+
+  DISALLOW_COPY_AND_ASSIGN(SdkMediaCodecBridge);
+};
+
+// Class for handling audio decoding using android MediaCodec APIs.
+// TODO(qinmin): implement the logic to switch between NDK and SDK
+// MediaCodecBridge.
+class MEDIA_EXPORT AudioCodecBridge : public SdkMediaCodecBridge {
+ public:
+  // Returns an AudioCodecBridge instance if |codec| is supported, or a NULL
+  // pointer otherwise.
+  static AudioCodecBridge* Create(const AudioCodec& codec);
+
+  // See MediaCodecUtil::IsKnownUnaccelerated().
+  static bool IsKnownUnaccelerated(const AudioCodec& codec);
+
+  // Start the audio codec bridge.
+  bool ConfigureAndStart(const AudioCodec& codec,
+                         int sample_rate,
+                         int channel_count,
+                         const uint8* extra_data,
+                         size_t extra_data_size,
+                         int64 codec_delay_ns,
+                         int64 seek_preroll_ns,
+                         bool play_audio,
+                         jobject media_crypto) WARN_UNUSED_RESULT;
+
+  // Plays the output buffer right away or save for later playback if |postpone|
+  // is set to true. This call must be called after DequeueOutputBuffer() and
+  // before ReleaseOutputBuffer. The data is extracted from the output buffers
+  // using |index|, |size| and |offset|. Returns the playback head position
+  // expressed in frames.
+  // When |postpone| is set to true, the next PlayOutputBuffer() should have
+  // postpone == false, and it will play two buffers: the postponed one and
+  // the one identified by |index|.
+  int64 PlayOutputBuffer(int index,
+                         size_t size,
+                         size_t offset,
+                         bool postpone = false);
+
+  // Set the volume of the audio output.
+  void SetVolume(double volume);
+
+ private:
+  explicit AudioCodecBridge(const std::string& mime);
+
+  // Configure the java MediaFormat object with the extra codec data passed in.
+  bool ConfigureMediaFormat(jobject j_format,
+                            const AudioCodec& codec,
+                            const uint8* extra_data,
+                            size_t extra_data_size,
+                            int64 codec_delay_ns,
+                            int64 seek_preroll_ns);
+};
+
+// Class for handling video encoding/decoding using android MediaCodec APIs.
+// TODO(qinmin): implement the logic to switch between NDK and SDK
+// MediaCodecBridge.
+class MEDIA_EXPORT VideoCodecBridge : public SdkMediaCodecBridge {
+ public:
+  // See MediaCodecUtil::IsKnownUnaccelerated().
+  static bool IsKnownUnaccelerated(const VideoCodec& codec,
+                                   MediaCodecDirection direction);
+
+  // Create, start, and return a VideoCodecBridge decoder or NULL on failure.
+  static VideoCodecBridge* CreateDecoder(
+      const VideoCodec& codec,  // e.g. media::kCodecVP8
+      bool is_secure,
+      const gfx::Size& size,  // Output frame size.
+      jobject surface,        // Output surface, optional.
+      jobject media_crypto);  // MediaCrypto object, optional.
+
+  // Create, start, and return a VideoCodecBridge encoder or NULL on failure.
+  static VideoCodecBridge* CreateEncoder(
+      const VideoCodec& codec,  // e.g. media::kCodecVP8
+      const gfx::Size& size,    // input frame size
+      int bit_rate,             // bits/second
+      int frame_rate,           // frames/second
+      int i_frame_interval,     // count
+      int color_format);        // MediaCodecInfo.CodecCapabilities.
+
+  void SetVideoBitrate(int bps);
+  void RequestKeyFrameSoon();
+
+  // Returns whether adaptive playback is supported for this object given
+  // the new size.
+  bool IsAdaptivePlaybackSupported(int width, int height);
+
+  // Test-only method to set the return value of IsAdaptivePlaybackSupported().
+  // Without this function, the return value of that function will be device
+  // dependent. If |adaptive_playback_supported| is equal to 0, the return value
+  // will be false. If |adaptive_playback_supported| is larger than 0, the
+  // return value will be true.
+  void set_adaptive_playback_supported_for_testing(
+      int adaptive_playback_supported) {
+    adaptive_playback_supported_for_testing_ = adaptive_playback_supported;
+  }
+
+ private:
+  VideoCodecBridge(const std::string& mime,
+                   bool is_secure,
+                   MediaCodecDirection direction);
+
+  int adaptive_playback_supported_for_testing_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_ANDROID_SDK_MEDIA_CODEC_BRIDGE_H_