Revert of Refactor MediaCodecBridge to add support for NDK APIs

media/base/android/media_codec_bridge.cc

 // 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.
 
 #include "media/base/android/media_codec_bridge.h"
 
 #include <algorithm>
+#include <limits>
 
 #include "base/android/build_info.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
+#include "base/basictypes.h"
+#include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/numerics/safe_conversions.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "jni/MediaCodecBridge_jni.h"
+#include "media/base/bit_reader.h"
 #include "media/base/decrypt_config.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::JavaIntArrayToIntVector;
 using base::android::ScopedJavaLocalRef;
 
+#define RETURN_ON_ERROR(condition)                          \
+  do {                                                           \
+    if (!(condition)) {                                          \
+      LOG(ERROR) << "Unable to parse AAC header: " #condition; \
+      return false;                                              \
+    }                                                            \
+  } while (0)
+
 namespace media {
 
-MediaCodecBridge::MediaCodecBridge() {}
-
-MediaCodecBridge::~MediaCodecBridge() {}
+enum {
+  kBufferFlagSyncFrame = 1,    // BUFFER_FLAG_SYNC_FRAME
+  kBufferFlagEndOfStream = 4,  // BUFFER_FLAG_END_OF_STREAM
+  kConfigureFlagEncode = 1,    // CONFIGURE_FLAG_ENCODE
+};
+
+static const std::string AudioCodecToAndroidMimeType(const AudioCodec& codec) {
+  switch (codec) {
+    case kCodecMP3:
+      return "audio/mpeg";
+    case kCodecVorbis:
+      return "audio/vorbis";
+    case kCodecOpus:
+      return "audio/opus";
+    case kCodecAAC:
+      return "audio/mp4a-latm";
+    default:
+      return std::string();
+  }
+}
+
+static const std::string VideoCodecToAndroidMimeType(const VideoCodec& codec) {
+  switch (codec) {
+    case kCodecH264:
+      return "video/avc";
+    case kCodecHEVC:
+      return "video/hevc";
+    case kCodecVP8:
+      return "video/x-vnd.on2.vp8";
+    case kCodecVP9:
+      return "video/x-vnd.on2.vp9";
+    default:
+      return std::string();
+  }
+}
+
+static const std::string CodecTypeToAndroidMimeType(const std::string& codec) {
+  // TODO(xhwang): Shall we handle more detailed strings like "mp4a.40.2"?
+  if (codec == "avc1")
+    return "video/avc";
+  if (codec == "hvc1")
+    return "video/hevc";
+  if (codec == "mp4a")
+    return "audio/mp4a-latm";
+  if (codec == "vp8" || codec == "vp8.0")
+    return "video/x-vnd.on2.vp8";
+  if (codec == "vp9" || codec == "vp9.0")
+    return "video/x-vnd.on2.vp9";
+  if (codec == "vorbis")
+    return "audio/vorbis";
+  if (codec == "opus")
+    return "audio/opus";
+  return std::string();
+}
+
+// TODO(qinmin): using a map to help all the conversions in this class.
+static const std::string AndroidMimeTypeToCodecType(const std::string& mime) {
+  if (mime == "video/mp4v-es")
+    return "mp4v";
+  if (mime == "video/avc")
+    return "avc1";
+  if (mime == "video/hevc")
+    return "hvc1";
+  if (mime == "video/x-vnd.on2.vp8")
+    return "vp8";
+  if (mime == "video/x-vnd.on2.vp9")
+    return "vp9";
+  if (mime == "audio/mp4a-latm")
+    return "mp4a";
+  if (mime == "audio/mpeg")
+    return "mp3";
+  if (mime == "audio/vorbis")
+    return "vorbis";
+  if (mime == "audio/opus")
+    return "opus";
+  return std::string();
+}
+
+static ScopedJavaLocalRef<jintArray>
+ToJavaIntArray(JNIEnv* env, scoped_ptr<jint[]> native_array, int size) {
+  ScopedJavaLocalRef<jintArray> j_array(env, env->NewIntArray(size));
+  env->SetIntArrayRegion(j_array.obj(), 0, size, native_array.get());
+  return j_array;
+}
+
+// static
+bool MediaCodecBridge::IsAvailable() {
+  // MediaCodec is only available on JB and greater.
+  if (base::android::BuildInfo::GetInstance()->sdk_int() < 16)
+    return false;
+  // Blacklist some devices on Jellybean as for MediaCodec support is buggy.
+  // http://crbug.com/365494.
+  if (base::android::BuildInfo::GetInstance()->sdk_int() == 16) {
+    std::string model(base::android::BuildInfo::GetInstance()->model());
+    return model != "GT-I9100" && model != "GT-I9300" && model != "GT-N7000";
+  }
+  return true;
+}
+
+// static
+bool MediaCodecBridge::SupportsSetParameters() {
+  // MediaCodec.setParameters() is only available starting with K.
+  return base::android::BuildInfo::GetInstance()->sdk_int() >= 19;
+}
+
+// static
+bool MediaCodecBridge::SupportsGetName() {
+  // MediaCodec.getName() is only available on JB MR2 and greater.
+  return base::android::BuildInfo::GetInstance()->sdk_int() >= 18;
+}
+
+// static
+std::vector<MediaCodecBridge::CodecsInfo> MediaCodecBridge::GetCodecsInfo() {
+  std::vector<CodecsInfo> codecs_info;
+  if (!IsAvailable())
+    return codecs_info;
+
+  JNIEnv* env = AttachCurrentThread();
+  std::string mime_type;
+  ScopedJavaLocalRef<jobjectArray> j_codec_info_array =
+      Java_MediaCodecBridge_getCodecsInfo(env);
+  jsize len = env->GetArrayLength(j_codec_info_array.obj());
+  for (jsize i = 0; i < len; ++i) {
+    ScopedJavaLocalRef<jobject> j_info(
+        env, env->GetObjectArrayElement(j_codec_info_array.obj(), i));
+    ScopedJavaLocalRef<jstring> j_codec_type =
+        Java_CodecInfo_codecType(env, j_info.obj());
+    ConvertJavaStringToUTF8(env, j_codec_type.obj(), &mime_type);
+    ScopedJavaLocalRef<jstring> j_codec_name =
+        Java_CodecInfo_codecName(env, j_info.obj());
+    CodecsInfo info;
+    info.codecs = AndroidMimeTypeToCodecType(mime_type);
+    ConvertJavaStringToUTF8(env, j_codec_name.obj(), &info.name);
+    info.direction = static_cast<MediaCodecDirection>(
+        Java_CodecInfo_direction(env, j_info.obj()));
+    codecs_info.push_back(info);
+  }
+  return codecs_info;
+}
+
+// static
+std::string MediaCodecBridge::GetDefaultCodecName(
+    const std::string& mime_type,
+    MediaCodecDirection direction) {
+  if (!IsAvailable())
+    return std::string();
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime_type);
+  ScopedJavaLocalRef<jstring> j_codec_name =
+      Java_MediaCodecBridge_getDefaultCodecName(env, j_mime.obj(), direction);
+  return ConvertJavaStringToUTF8(env, j_codec_name.obj());
+}
+
+// static
+std::set<int> MediaCodecBridge::GetEncoderColorFormats(
+    const std::string& mime_type) {
+  std::set<int> color_formats;
+  if (!IsAvailable())
+    return color_formats;
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime_type);
+  ScopedJavaLocalRef<jintArray> j_color_format_array =
+      Java_MediaCodecBridge_getEncoderColorFormatsForMime(env, j_mime.obj());
+
+  if (j_color_format_array.obj()) {
+    std::vector<int> formats;
+    JavaIntArrayToIntVector(env, j_color_format_array.obj(), &formats);
+    color_formats = std::set<int>(formats.begin(), formats.end());
+  }
+
+  return color_formats;
+}
+
+// static
+bool MediaCodecBridge::CanDecode(const std::string& codec, bool is_secure) {
+  if (!IsAvailable())
+    return false;
+
+  JNIEnv* env = AttachCurrentThread();
+  std::string mime = CodecTypeToAndroidMimeType(codec);
+  if (mime.empty())
+    return false;
+  ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime);
+  ScopedJavaLocalRef<jobject> j_media_codec_bridge =
+      Java_MediaCodecBridge_create(env, j_mime.obj(), is_secure, false);
+  if (!j_media_codec_bridge.is_null()) {
+    Java_MediaCodecBridge_release(env, j_media_codec_bridge.obj());
+    return true;
+  }
+  return false;
+}
+
+// static
+bool MediaCodecBridge::IsKnownUnaccelerated(const std::string& mime_type,
+                                            MediaCodecDirection direction) {
+  if (!IsAvailable())
+    return true;
+
+  std::string codec_name;
+  if (SupportsGetName()) {
+    codec_name = GetDefaultCodecName(mime_type, direction);
+  } else {
+    std::string codec_type = AndroidMimeTypeToCodecType(mime_type);
+    std::vector<media::MediaCodecBridge::CodecsInfo> codecs_info =
+        MediaCodecBridge::GetCodecsInfo();
+    for (size_t i = 0; i < codecs_info.size(); ++i) {
+      if (codecs_info[i].codecs == codec_type &&
+          codecs_info[i].direction == direction) {
+        codec_name = codecs_info[i].name;
+        break;
+      }
+    }
+  }
+  DVLOG(1) << __PRETTY_FUNCTION__ << "Default codec for " << mime_type <<
+      " : " << codec_name;
+  // It would be nice if MediaCodecInfo externalized some notion of
+  // HW-acceleration but it doesn't. Android Media guidance is that the
+  // "OMX.google" prefix is always used for SW decoders, so that's what we
+  // use. "OMX.SEC.*" codec is Samsung software implementation - report it
+  // as unaccelerated as well. Also temporary blacklist Exynos and MediaTek
+  // devices while HW decoder video freezes and distortions are
+  // investigated - http://crbug.com/446974.
+  if (codec_name.length() > 0) {
+    return (base::StartsWith(codec_name, "OMX.google.",
+                             base::CompareCase::SENSITIVE) ||
+            base::StartsWith(codec_name, "OMX.SEC.",
+                             base::CompareCase::SENSITIVE) ||
+            base::StartsWith(codec_name, "OMX.MTK.",
+                             base::CompareCase::SENSITIVE) ||
+            base::StartsWith(codec_name, "OMX.Exynos.",
+                             base::CompareCase::SENSITIVE));
+  }
+  return true;
+}
+
+MediaCodecBridge::MediaCodecBridge(const std::string& mime,
+                                   bool is_secure,
+                                   MediaCodecDirection direction) {
+  JNIEnv* env = AttachCurrentThread();
+  CHECK(env);
+  DCHECK(!mime.empty());
+  ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime);
+  j_media_codec_.Reset(
+      Java_MediaCodecBridge_create(env, j_mime.obj(), is_secure, direction));
+}
+
+MediaCodecBridge::~MediaCodecBridge() {
+  JNIEnv* env = AttachCurrentThread();
+  CHECK(env);
+  if (j_media_codec_.obj())
+    Java_MediaCodecBridge_release(env, j_media_codec_.obj());
+}
+
+bool MediaCodecBridge::StartInternal() {
+  JNIEnv* env = AttachCurrentThread();
+  return Java_MediaCodecBridge_start(env, j_media_codec_.obj());
+}
+
+MediaCodecStatus MediaCodecBridge::Reset() {
+  JNIEnv* env = AttachCurrentThread();
+  return static_cast<MediaCodecStatus>(
+      Java_MediaCodecBridge_flush(env, j_media_codec_.obj()));
+}
+
+void MediaCodecBridge::Stop() {
+  JNIEnv* env = AttachCurrentThread();
+  Java_MediaCodecBridge_stop(env, j_media_codec_.obj());
+}
+
+void MediaCodecBridge::GetOutputFormat(int* width, int* height) {
+  JNIEnv* env = AttachCurrentThread();
+
+  *width = Java_MediaCodecBridge_getOutputWidth(env, j_media_codec_.obj());
+  *height = Java_MediaCodecBridge_getOutputHeight(env, j_media_codec_.obj());
+}
+
+int MediaCodecBridge::GetOutputSamplingRate() {
+  JNIEnv* env = AttachCurrentThread();
+
+  return Java_MediaCodecBridge_getOutputSamplingRate(env, j_media_codec_.obj());
+}
+
+MediaCodecStatus MediaCodecBridge::QueueInputBuffer(
+    int index,
+    const uint8* data,
+    size_t data_size,
+    const base::TimeDelta& presentation_time) {
+  DVLOG(3) << __PRETTY_FUNCTION__ << index << ": " << data_size;
+  if (data_size >
+      base::checked_cast<size_t>(std::numeric_limits<int32_t>::max()))
+    return MEDIA_CODEC_ERROR;
+  if (data && !FillInputBuffer(index, data, data_size))
+    return MEDIA_CODEC_ERROR;
+  JNIEnv* env = AttachCurrentThread();
+  return static_cast<MediaCodecStatus>(
+      Java_MediaCodecBridge_queueInputBuffer(env,
+                                             j_media_codec_.obj(),
+                                             index,
+                                             0,
+                                             data_size,
+                                             presentation_time.InMicroseconds(),
+                                             0));
+}
 
 MediaCodecStatus MediaCodecBridge::QueueSecureInputBuffer(
     int index,
     const uint8_t* data,
     size_t data_size,
     const std::string& key_id,
     const std::string& iv,
     const std::vector<SubsampleEntry>& subsamples,
     const base::TimeDelta& presentation_time) {
-  const std::vector<char> key_vec(key_id.begin(), key_id.end());
-  const std::vector<char> iv_vec(iv.begin(), iv.end());
-  return QueueSecureInputBuffer(index, data, data_size, key_vec, iv_vec,
-                                subsamples.empty() ? nullptr : &subsamples[0],
-                                subsamples.size(), presentation_time);
+  return QueueSecureInputBuffer(
+      index, data, data_size, reinterpret_cast<const uint8_t*>(key_id.data()),
+      key_id.size(), reinterpret_cast<const uint8_t*>(iv.data()), iv.size(),
+      subsamples.empty() ? nullptr : &subsamples[0], subsamples.size(),
+      presentation_time);
+}
+
+// TODO(timav): Combine this and above methods together keeping only the first
+// interface after we switch to Spitzer pipeline.
+MediaCodecStatus MediaCodecBridge::QueueSecureInputBuffer(
+    int index,
+    const uint8* data,
+    size_t data_size,
+    const uint8* key_id,
+    int key_id_size,
+    const uint8* iv,
+    int iv_size,
+    const SubsampleEntry* subsamples,
+    int subsamples_size,
+    const base::TimeDelta& presentation_time) {
+  DVLOG(3) << __PRETTY_FUNCTION__ << index << ": " << data_size;
+  if (data_size >
+      base::checked_cast<size_t>(std::numeric_limits<int32_t>::max()))
+    return MEDIA_CODEC_ERROR;
+  if (data && !FillInputBuffer(index, data, data_size))
+    return MEDIA_CODEC_ERROR;
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jbyteArray> j_key_id =
+      base::android::ToJavaByteArray(env, key_id, key_id_size);
+  ScopedJavaLocalRef<jbyteArray> j_iv =
+      base::android::ToJavaByteArray(env, iv, iv_size);
+
+  // MediaCodec.CryptoInfo documentations says passing NULL for |clear_array|
+  // to indicate that all data is encrypted. But it doesn't specify what
+  // |cypher_array| and |subsamples_size| should be in that case. Passing
+  // one subsample here just to be on the safe side.
+  int new_subsamples_size = subsamples_size == 0 ? 1 : subsamples_size;
+
+  scoped_ptr<jint[]> native_clear_array(new jint[new_subsamples_size]);
+  scoped_ptr<jint[]> native_cypher_array(new jint[new_subsamples_size]);
+
+  if (subsamples_size == 0) {
+    DCHECK(!subsamples);
+    native_clear_array[0] = 0;
+    native_cypher_array[0] = data_size;
+  } else {
+    DCHECK_GT(subsamples_size, 0);
+    DCHECK(subsamples);
+    for (int i = 0; i < subsamples_size; ++i) {
+      DCHECK(subsamples[i].clear_bytes <= std::numeric_limits<uint16>::max());
+      if (subsamples[i].cypher_bytes >
+          static_cast<uint32>(std::numeric_limits<jint>::max())) {
+        return MEDIA_CODEC_ERROR;
+      }
+
+      native_clear_array[i] = subsamples[i].clear_bytes;
+      native_cypher_array[i] = subsamples[i].cypher_bytes;
+    }
+  }
+
+  ScopedJavaLocalRef<jintArray> clear_array =
+      ToJavaIntArray(env, native_clear_array.Pass(), new_subsamples_size);
+  ScopedJavaLocalRef<jintArray> cypher_array =
+      ToJavaIntArray(env, native_cypher_array.Pass(), new_subsamples_size);
+
+  return static_cast<MediaCodecStatus>(
+      Java_MediaCodecBridge_queueSecureInputBuffer(
+          env,
+          j_media_codec_.obj(),
+          index,
+          0,
+          j_iv.obj(),
+          j_key_id.obj(),
+          clear_array.obj(),
+          cypher_array.obj(),
+          new_subsamples_size,
+          presentation_time.InMicroseconds()));
+}
+
+void MediaCodecBridge::QueueEOS(int input_buffer_index) {
+  DVLOG(3) << __PRETTY_FUNCTION__ << ": " << input_buffer_index;
+  JNIEnv* env = AttachCurrentThread();
+  Java_MediaCodecBridge_queueInputBuffer(env,
+                                         j_media_codec_.obj(),
+                                         input_buffer_index,
+                                         0,
+                                         0,
+                                         0,
+                                         kBufferFlagEndOfStream);
+}
+
+MediaCodecStatus MediaCodecBridge::DequeueInputBuffer(
+    const base::TimeDelta& timeout,
+    int* index) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> result = Java_MediaCodecBridge_dequeueInputBuffer(
+      env, j_media_codec_.obj(), timeout.InMicroseconds());
+  *index = Java_DequeueInputResult_index(env, result.obj());
+  MediaCodecStatus status = static_cast<MediaCodecStatus>(
+      Java_DequeueInputResult_status(env, result.obj()));
+  DVLOG(3) << __PRETTY_FUNCTION__ << ": status: " << status
+           << ", index: " << *index;
+  return status;
+}
+
+MediaCodecStatus MediaCodecBridge::DequeueOutputBuffer(
+    const base::TimeDelta& timeout,
+    int* index,
+    size_t* offset,
+    size_t* size,
+    base::TimeDelta* presentation_time,
+    bool* end_of_stream,
+    bool* key_frame) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> result =
+      Java_MediaCodecBridge_dequeueOutputBuffer(
+          env, j_media_codec_.obj(), timeout.InMicroseconds());
+  *index = Java_DequeueOutputResult_index(env, result.obj());
+  *offset = base::checked_cast<size_t>(
+      Java_DequeueOutputResult_offset(env, result.obj()));
+  *size = base::checked_cast<size_t>(
+      Java_DequeueOutputResult_numBytes(env, result.obj()));
+  if (presentation_time) {
+    *presentation_time = base::TimeDelta::FromMicroseconds(
+        Java_DequeueOutputResult_presentationTimeMicroseconds(env,
+                                                              result.obj()));
+  }
+  int flags = Java_DequeueOutputResult_flags(env, result.obj());
+  if (end_of_stream)
+    *end_of_stream = flags & kBufferFlagEndOfStream;
+  if (key_frame)
+    *key_frame = flags & kBufferFlagSyncFrame;
+  MediaCodecStatus status = static_cast<MediaCodecStatus>(
+      Java_DequeueOutputResult_status(env, result.obj()));
+  DVLOG(3) << __PRETTY_FUNCTION__ << ": status: " << status
+           << ", index: " << *index << ", offset: " << *offset
+           << ", size: " << *size << ", flags: " << flags;
+  return status;
+}
+
+void MediaCodecBridge::ReleaseOutputBuffer(int index, bool render) {
+  DVLOG(3) << __PRETTY_FUNCTION__ << ": " << index;
+  JNIEnv* env = AttachCurrentThread();
+  CHECK(env);
+
+  Java_MediaCodecBridge_releaseOutputBuffer(
+      env, j_media_codec_.obj(), index, render);
 }
 
 int MediaCodecBridge::GetOutputBuffersCount() {
-  return 0;
+  JNIEnv* env = AttachCurrentThread();
+  return Java_MediaCodecBridge_getOutputBuffersCount(env, j_media_codec_.obj());
 }
 
 size_t MediaCodecBridge::GetOutputBuffersCapacity() {
-  return 0;
+  JNIEnv* env = AttachCurrentThread();
+  return Java_MediaCodecBridge_getOutputBuffersCapacity(env,
+                                                        j_media_codec_.obj());
+}
+
+void MediaCodecBridge::GetInputBuffer(int input_buffer_index,
+                                      uint8** data,
+                                      size_t* capacity) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> j_buffer(Java_MediaCodecBridge_getInputBuffer(
+      env, j_media_codec_.obj(), input_buffer_index));
+  *data = static_cast<uint8*>(env->GetDirectBufferAddress(j_buffer.obj()));
+  *capacity = base::checked_cast<size_t>(
+      env->GetDirectBufferCapacity(j_buffer.obj()));
+}
+
+bool MediaCodecBridge::CopyFromOutputBuffer(int index,
+                                            size_t offset,
+                                            void* dst,
+                                            int dst_size) {
+  void* src_data = nullptr;
+  int src_capacity = GetOutputBufferAddress(index, offset, &src_data);
+  if (src_capacity < dst_size)
+    return false;
+  memcpy(dst, src_data, dst_size);
+  return true;
+}
+
+int MediaCodecBridge::GetOutputBufferAddress(int index,
+                                             size_t offset,
+                                             void** addr) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> j_buffer(
+      Java_MediaCodecBridge_getOutputBuffer(env, j_media_codec_.obj(), index));
+  *addr = reinterpret_cast<uint8*>(
+      env->GetDirectBufferAddress(j_buffer.obj())) + offset;
+  return env->GetDirectBufferCapacity(j_buffer.obj()) - offset;
 }
 
 bool MediaCodecBridge::FillInputBuffer(int index,
                                        const uint8_t* data,
                                        size_t size) {
-  uint8_t* dst = nullptr;
+  uint8* dst = NULL;
   size_t capacity = 0;
   GetInputBuffer(index, &dst, &capacity);
   CHECK(dst);
 
   if (size > capacity) {
     LOG(ERROR) << "Input buffer size " << size
                << " exceeds MediaCodec input buffer capacity: " << capacity;
     return false;
   }
 
   memcpy(dst, data, size);
   return true;
 }
 
+AudioCodecBridge::AudioCodecBridge(const std::string& mime)
+    // Audio codec doesn't care about security level and there is no need for
+    // audio encoding yet.
+    : MediaCodecBridge(mime, false, MEDIA_CODEC_DECODER) {}
+
+bool AudioCodecBridge::Start(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) {
+  JNIEnv* env = AttachCurrentThread();
+
+  if (!media_codec())
+    return false;
+
+  std::string codec_string = AudioCodecToAndroidMimeType(codec);
+  if (codec_string.empty())
+    return false;
+
+  ScopedJavaLocalRef<jstring> j_mime =
+      ConvertUTF8ToJavaString(env, codec_string);
+  ScopedJavaLocalRef<jobject> j_format(Java_MediaCodecBridge_createAudioFormat(
+      env, j_mime.obj(), sample_rate, channel_count));
+  DCHECK(!j_format.is_null());
+
+  if (!ConfigureMediaFormat(j_format.obj(), codec, extra_data, extra_data_size,
+                            codec_delay_ns, seek_preroll_ns)) {
+    return false;
+  }
+
+  if (!Java_MediaCodecBridge_configureAudio(
+           env, media_codec(), j_format.obj(), media_crypto, 0, play_audio)) {
+    return false;
+  }
+
+  return StartInternal();
+}
+
+bool AudioCodecBridge::ConfigureMediaFormat(jobject j_format,
+                                            const AudioCodec& codec,
+                                            const uint8* extra_data,
+                                            size_t extra_data_size,
+                                            int64 codec_delay_ns,
+                                            int64 seek_preroll_ns) {
+  if (extra_data_size == 0 && codec != kCodecOpus)
+    return true;
+
+  JNIEnv* env = AttachCurrentThread();
+  switch (codec) {
+    case kCodecVorbis: {
+      if (extra_data[0] != 2) {
+        LOG(ERROR) << "Invalid number of vorbis headers before the codec "
+                   << "header: " << extra_data[0];
+        return false;
+      }
+
+      size_t header_length[2];
+      // |total_length| keeps track of the total number of bytes before the last
+      // header.
+      size_t total_length = 1;
+      const uint8* current_pos = extra_data;
+      // Calculate the length of the first 2 headers.
+      for (int i = 0; i < 2; ++i) {
+        header_length[i] = 0;
+        while (total_length < extra_data_size) {
+          size_t size = *(++current_pos);
+          total_length += 1 + size;
+          if (total_length > 0x80000000) {
+            LOG(ERROR) << "Vorbis header size too large";
+            return false;
+          }
+          header_length[i] += size;
+          if (size < 0xFF)
+            break;
+        }
+        if (total_length >= extra_data_size) {
+          LOG(ERROR) << "Invalid vorbis header size in the extra data";
+          return false;
+        }
+      }
+      current_pos++;
+      // The first header is identification header.
+      ScopedJavaLocalRef<jbyteArray> first_header =
+          base::android::ToJavaByteArray(env, current_pos, header_length[0]);
+      Java_MediaCodecBridge_setCodecSpecificData(
+          env, j_format, 0, first_header.obj());
+      // The last header is codec header.
+      ScopedJavaLocalRef<jbyteArray> last_header =
+          base::android::ToJavaByteArray(
+              env, extra_data + total_length, extra_data_size - total_length);
+      Java_MediaCodecBridge_setCodecSpecificData(
+          env, j_format, 1, last_header.obj());
+      break;
+    }
+    case kCodecAAC: {
+      media::BitReader reader(extra_data, extra_data_size);
+
+      // The following code is copied from aac.cc
+      // TODO(qinmin): refactor the code in aac.cc to make it more reusable.
+      uint8 profile = 0;
+      uint8 frequency_index = 0;
+      uint8 channel_config = 0;
+      RETURN_ON_ERROR(reader.ReadBits(5, &profile));
+      RETURN_ON_ERROR(reader.ReadBits(4, &frequency_index));
+
+      if (0xf == frequency_index)
+        RETURN_ON_ERROR(reader.SkipBits(24));
+      RETURN_ON_ERROR(reader.ReadBits(4, &channel_config));
+
+      if (profile == 5 || profile == 29) {
+        // Read extension config.
+        RETURN_ON_ERROR(reader.ReadBits(4, &frequency_index));
+        if (frequency_index == 0xf)
+          RETURN_ON_ERROR(reader.SkipBits(24));
+        RETURN_ON_ERROR(reader.ReadBits(5, &profile));
+      }
+
+      if (profile < 1 || profile > 4 || frequency_index == 0xf ||
+          channel_config > 7) {
+        LOG(ERROR) << "Invalid AAC header";
+        return false;
+      }
+      const size_t kCsdLength = 2;
+      uint8 csd[kCsdLength];
+      csd[0] = profile << 3 | frequency_index >> 1;
+      csd[1] = (frequency_index & 0x01) << 7 | channel_config << 3;
+      ScopedJavaLocalRef<jbyteArray> byte_array =
+          base::android::ToJavaByteArray(env, csd, kCsdLength);
+      Java_MediaCodecBridge_setCodecSpecificData(
+          env, j_format, 0, byte_array.obj());
+
+      // TODO(qinmin): pass an extra variable to this function to determine
+      // whether we need to call this.
+      Java_MediaCodecBridge_setFrameHasADTSHeader(env, j_format);
+      break;
+    }
+    case kCodecOpus: {
+      if (!extra_data || extra_data_size == 0 ||
+          codec_delay_ns < 0 || seek_preroll_ns < 0) {
+        LOG(ERROR) << "Invalid Opus Header";
+        return false;
+      }
+
+      // csd0 - Opus Header
+      ScopedJavaLocalRef<jbyteArray> csd0 =
+          base::android::ToJavaByteArray(env, extra_data, extra_data_size);
+      Java_MediaCodecBridge_setCodecSpecificData(env, j_format, 0, csd0.obj());
+
+      // csd1 - Codec Delay
+      ScopedJavaLocalRef<jbyteArray> csd1 =
+          base::android::ToJavaByteArray(
+              env, reinterpret_cast<const uint8*>(&codec_delay_ns),
+              sizeof(int64_t));
+      Java_MediaCodecBridge_setCodecSpecificData(env, j_format, 1, csd1.obj());
+
+      // csd2 - Seek Preroll
+      ScopedJavaLocalRef<jbyteArray> csd2 =
+          base::android::ToJavaByteArray(
+              env, reinterpret_cast<const uint8*>(&seek_preroll_ns),
+              sizeof(int64_t));
+      Java_MediaCodecBridge_setCodecSpecificData(env, j_format, 2, csd2.obj());
+      break;
+    }
+    default:
+      LOG(ERROR) << "Invalid header encountered for codec: "
+                 << AudioCodecToAndroidMimeType(codec);
+      return false;
+  }
+  return true;
+}
+
+int64 AudioCodecBridge::PlayOutputBuffer(int index,
+                                         size_t size,
+                                         size_t offset,
+                                         bool postpone) {
+  DCHECK_LE(0, index);
+  int numBytes = base::checked_cast<int>(size);
+
+  void* buffer = nullptr;
+  int capacity = GetOutputBufferAddress(index, offset, &buffer);
+  numBytes = std::min(capacity, numBytes);
+  CHECK_GE(numBytes, 0);
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jbyteArray> byte_array = base::android::ToJavaByteArray(
+          env, static_cast<uint8*>(buffer), numBytes);
+  return Java_MediaCodecBridge_playOutputBuffer(env, media_codec(),
+                                                byte_array.obj(), postpone);
+}
+
+void AudioCodecBridge::SetVolume(double volume) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_MediaCodecBridge_setVolume(env, media_codec(), volume);
+}
+
+// static
+AudioCodecBridge* AudioCodecBridge::Create(const AudioCodec& codec) {
+  if (!MediaCodecBridge::IsAvailable())
+    return NULL;
+
+  const std::string mime = AudioCodecToAndroidMimeType(codec);
+  return mime.empty() ? NULL : new AudioCodecBridge(mime);
+}
+
+// static
+bool AudioCodecBridge::IsKnownUnaccelerated(const AudioCodec& codec) {
+  return MediaCodecBridge::IsKnownUnaccelerated(
+      AudioCodecToAndroidMimeType(codec), MEDIA_CODEC_DECODER);
+}
+
+// static
+bool VideoCodecBridge::IsKnownUnaccelerated(const VideoCodec& codec,
+                                            MediaCodecDirection direction) {
+  return MediaCodecBridge::IsKnownUnaccelerated(
+      VideoCodecToAndroidMimeType(codec), direction);
+}
+
+// static
+VideoCodecBridge* VideoCodecBridge::CreateDecoder(const VideoCodec& codec,
+                                                  bool is_secure,
+                                                  const gfx::Size& size,
+                                                  jobject surface,
+                                                  jobject media_crypto) {
+  if (!MediaCodecBridge::IsAvailable())
+    return NULL;
+
+  const std::string mime = VideoCodecToAndroidMimeType(codec);
+  if (mime.empty())
+    return NULL;
+
+  scoped_ptr<VideoCodecBridge> bridge(
+      new VideoCodecBridge(mime, is_secure, MEDIA_CODEC_DECODER));
+  if (!bridge->media_codec())
+    return NULL;
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime);
+  ScopedJavaLocalRef<jobject> j_format(
+      Java_MediaCodecBridge_createVideoDecoderFormat(
+          env, j_mime.obj(), size.width(), size.height()));
+  DCHECK(!j_format.is_null());
+  if (!Java_MediaCodecBridge_configureVideo(env,
+                                            bridge->media_codec(),
+                                            j_format.obj(),
+                                            surface,
+                                            media_crypto,
+                                            0)) {
+    return NULL;
+  }
+
+  return bridge->StartInternal() ? bridge.release() : NULL;
+}
+
+// static
+VideoCodecBridge* VideoCodecBridge::CreateEncoder(const VideoCodec& codec,
+                                                  const gfx::Size& size,
+                                                  int bit_rate,
+                                                  int frame_rate,
+                                                  int i_frame_interval,
+                                                  int color_format) {
+  if (!MediaCodecBridge::IsAvailable())
+    return NULL;
+
+  const std::string mime = VideoCodecToAndroidMimeType(codec);
+  if (mime.empty())
+    return NULL;
+
+  scoped_ptr<VideoCodecBridge> bridge(
+      new VideoCodecBridge(mime, false, MEDIA_CODEC_ENCODER));
+  if (!bridge->media_codec())
+    return NULL;
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime);
+  ScopedJavaLocalRef<jobject> j_format(
+      Java_MediaCodecBridge_createVideoEncoderFormat(env,
+                                                     j_mime.obj(),
+                                                     size.width(),
+                                                     size.height(),
+                                                     bit_rate,
+                                                     frame_rate,
+                                                     i_frame_interval,
+                                                     color_format));
+  DCHECK(!j_format.is_null());
+  if (!Java_MediaCodecBridge_configureVideo(env,
+                                            bridge->media_codec(),
+                                            j_format.obj(),
+                                            NULL,
+                                            NULL,
+                                            kConfigureFlagEncode)) {
+    return NULL;
+  }
+
+  return bridge->StartInternal() ? bridge.release() : NULL;
+}
+
+VideoCodecBridge::VideoCodecBridge(const std::string& mime,
+                                   bool is_secure,
+                                   MediaCodecDirection direction)
+    : MediaCodecBridge(mime, is_secure, direction),
+      adaptive_playback_supported_for_testing_(-1) {}
+
+void VideoCodecBridge::SetVideoBitrate(int bps) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_MediaCodecBridge_setVideoBitrate(env, media_codec(), bps);
+}
+
+void VideoCodecBridge::RequestKeyFrameSoon() {
+  JNIEnv* env = AttachCurrentThread();
+  Java_MediaCodecBridge_requestKeyFrameSoon(env, media_codec());
+}
+
+bool VideoCodecBridge::IsAdaptivePlaybackSupported(int width, int height) {
+  if (adaptive_playback_supported_for_testing_ == 0)
+    return false;
+  else if (adaptive_playback_supported_for_testing_ > 0)
+    return true;
+  JNIEnv* env = AttachCurrentThread();
+  return Java_MediaCodecBridge_isAdaptivePlaybackSupported(
+      env, media_codec(), width, height);
+}
+
+bool MediaCodecBridge::RegisterMediaCodecBridge(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
 }  // namespace media