Refactor MediaCodecBridge to add support for NDK APIs

media/base/android/ndk_media_codec_bridge.cc

+// Copyright 2015 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/ndk_media_codec_bridge.h"
+
+#include <media/NdkMediaError.h>
+#include <media/NdkMediaFormat.h>
+
+#include <limits>
+
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/native_library.h"
+#include "base/strings/string_util.h"
+#include "media/base/decrypt_config.h"
+
+namespace {
+const char kMediaFormatKeyCropLeft[] = "crop-left";
+const char kMediaFormatKeyCropRight[] = "crop-right";
+const char kMediaFormatKeyCropBottom[] = "crop-bottom";
+const char kMediaFormatKeyCropTop[] = "crop-top";
+}
+
+namespace media {
+
+// Translate media_status_t to MediaCodecStatus.
+static MediaCodecStatus TranslateMediaCodecStatus(media_status_t status) {
+  switch (status) {
+    case AMEDIA_OK:
+      return MEDIA_CODEC_OK;
+    case AMEDIA_DRM_NEED_KEY:
+      return MEDIA_CODEC_NO_KEY;
+    default:
+      return MEDIA_CODEC_ERROR;
+  }
+}
+
+NdkMediaCodecBridge::~NdkMediaCodecBridge() {}
+
+NdkMediaCodecBridge::NdkMediaCodecBridge(const std::string& mime,
+                                         bool is_secure,
+                                         MediaCodecDirection direction) {
+  if (base::StartsWith(mime, "video", base::CompareCase::SENSITIVE) &&
+      is_secure && direction == MEDIA_CODEC_DECODER) {
+    // TODO(qinmin): get the secure decoder name from java.
+    NOTIMPLEMENTED();
+    return;
+  }
+
+  if (direction == MEDIA_CODEC_DECODER)
+    media_codec_.reset(AMediaCodec_createDecoderByType(mime.c_str()));
+  else
+    media_codec_.reset(AMediaCodec_createEncoderByType(mime.c_str()));
+}
+
+MediaCodecStatus NdkMediaCodecBridge::Reset() {
+  media_status_t status = AMediaCodec_flush(media_codec_.get());
+  return TranslateMediaCodecStatus(status);
+}
+
+bool NdkMediaCodecBridge::Start() {
+  return AMEDIA_OK == AMediaCodec_start(media_codec_.get());
+}
+
+void NdkMediaCodecBridge::Stop() {
+  AMediaCodec_stop(media_codec_.get());
+}
+
+void NdkMediaCodecBridge::GetOutputFormat(int* width, int* height) {
+  AMediaFormat* format = AMediaCodec_getOutputFormat(media_codec_.get());
+  int left, right, bottom, top;
+  bool has_left = AMediaFormat_getInt32(format, kMediaFormatKeyCropLeft, &left);
+  bool has_right =
+      AMediaFormat_getInt32(format, kMediaFormatKeyCropRight, &right);
+  bool has_bottom =
+      AMediaFormat_getInt32(format, kMediaFormatKeyCropBottom, &bottom);
+  bool has_top = AMediaFormat_getInt32(format, kMediaFormatKeyCropTop, &top);
+  if (has_left && has_right && has_bottom && has_top) {
+    // Use crop size as it is more accurate. right and bottom are inclusive.
+    *width = right - left + 1;
+    *height = top - bottom + 1;
+  } else {
+    AMediaFormat_getInt32(format, AMEDIAFORMAT_KEY_WIDTH, width);
+    AMediaFormat_getInt32(format, AMEDIAFORMAT_KEY_HEIGHT, height);
+  }
+}
+
+int NdkMediaCodecBridge::GetOutputSamplingRate() {
+  AMediaFormat* format = AMediaCodec_getOutputFormat(media_codec_.get());
+  int sample_rate = 0;
+  AMediaFormat_getInt32(format, AMEDIAFORMAT_KEY_SAMPLE_RATE, &sample_rate);
+  DCHECK(sample_rate != 0);
+  return sample_rate;
+}
+
+MediaCodecStatus NdkMediaCodecBridge::QueueInputBuffer(
+    int index,
+    const uint8_t* data,
+    size_t data_size,
+    const base::TimeDelta& presentation_time) {
+  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;
+
+  media_status_t status =
+      AMediaCodec_queueInputBuffer(media_codec_.get(), index, 0, data_size,
+                                   presentation_time.InMicroseconds(), 0);
+  return TranslateMediaCodecStatus(status);
+}
+
+MediaCodecStatus NdkMediaCodecBridge::QueueSecureInputBuffer(
+    int index,
+    const uint8_t* data,
+    size_t data_size,
+    const std::vector<char>& key_id,
+    const std::vector<char>& iv,
+    const SubsampleEntry* subsamples,
+    int subsamples_size,
+    const base::TimeDelta& presentation_time) {
+  if (data_size >
+      base::checked_cast<size_t>(std::numeric_limits<int32_t>::max())) {
+    return MEDIA_CODEC_ERROR;
+  }
+  if (key_id.size() > 16 || iv.size())
+    return MEDIA_CODEC_ERROR;
+  if (data && !FillInputBuffer(index, data, data_size))
+    return MEDIA_CODEC_ERROR;
+
+  int new_subsamples_size = subsamples_size == 0 ? 1 : subsamples_size;
+  std::vector<size_t> clear_data, encrypted_data;
+  if (subsamples_size == 0) {
+    DCHECK(!subsamples);
+    clear_data.push_back(0);
+    encrypted_data.push_back(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_t>::max());
+      if (subsamples[i].cypher_bytes >
+          static_cast<int32_t>(std::numeric_limits<int32_t>::max())) {
+        return MEDIA_CODEC_ERROR;
+      }
+      clear_data.push_back(subsamples[i].clear_bytes);
+      encrypted_data.push_back(subsamples[i].cypher_bytes);
+    }
+  }
+
+  AMediaCodecCryptoInfo* crypto_info = AMediaCodecCryptoInfo_new(
+      new_subsamples_size,
+      reinterpret_cast<uint8_t*>(const_cast<char*>(key_id.data())),
+      reinterpret_cast<uint8_t*>(const_cast<char*>(iv.data())),
+      AMEDIACODECRYPTOINFO_MODE_AES_CTR, clear_data.data(),
+      encrypted_data.data());
+
+  media_status_t status = AMediaCodec_queueSecureInputBuffer(
+      media_codec_.get(), index, 0, crypto_info,
+      presentation_time.InMicroseconds(), 0);
+  AMediaCodecCryptoInfo_delete(crypto_info);
+  return TranslateMediaCodecStatus(status);
+}
+
+void NdkMediaCodecBridge::QueueEOS(int input_buffer_index) {
+  AMediaCodec_queueInputBuffer(media_codec_.get(), input_buffer_index, 0, 0, 0,
+                               AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM);
+}
+
+MediaCodecStatus NdkMediaCodecBridge::DequeueInputBuffer(
+    const base::TimeDelta& timeout,
+    int* index) {
+  *index = AMediaCodec_dequeueInputBuffer(media_codec_.get(),
+                                          timeout.InMicroseconds());
+  if (*index >= 0)
+    return MEDIA_CODEC_OK;
+  else if (*index == AMEDIACODEC_INFO_TRY_AGAIN_LATER)
+    return MEDIA_CODEC_DEQUEUE_INPUT_AGAIN_LATER;
+  else
+    return MEDIA_CODEC_ERROR;
+}
+
+MediaCodecStatus NdkMediaCodecBridge::DequeueOutputBuffer(
+    const base::TimeDelta& timeout,
+    int* index,
+    size_t* offset,
+    size_t* size,
+    base::TimeDelta* presentation_time,
+    bool* end_of_stream,
+    bool* key_frame) {
+  AMediaCodecBufferInfo buffer_info;
+  *index = AMediaCodec_dequeueOutputBuffer(media_codec_.get(), &buffer_info,
+                                           timeout.InMicroseconds());
+  *offset = buffer_info.offset;
+  *size = buffer_info.size;
+  *presentation_time =
+      base::TimeDelta::FromMicroseconds(buffer_info.presentationTimeUs);
+  if (end_of_stream)
+    *end_of_stream = buffer_info.flags & AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM;
+  if (key_frame)
+    *key_frame = false;  // This is deprecated.
+  if (*index >= 0)
+    return MEDIA_CODEC_OK;
+  else if (*index == AMEDIACODEC_INFO_TRY_AGAIN_LATER)
+    return MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER;
+  else
+    return MEDIA_CODEC_ERROR;
+}
+
+void NdkMediaCodecBridge::ReleaseOutputBuffer(int index, bool render) {
+  AMediaCodec_releaseOutputBuffer(media_codec_.get(), index, render);
+}
+
+void NdkMediaCodecBridge::GetInputBuffer(int input_buffer_index,
+                                         uint8_t** data,
+                                         size_t* capacity) {
+  *data = AMediaCodec_getInputBuffer(media_codec_.get(), input_buffer_index,
+                                     capacity);
+}
+
+bool NdkMediaCodecBridge::CopyFromOutputBuffer(int index,
+                                               size_t offset,
+                                               void* dst,
+                                               int dst_size) {
+  size_t capacity;
+  uint8_t* src_data =
+      AMediaCodec_getOutputBuffer(media_codec_.get(), index, &capacity);
+
+  if (capacity < offset || capacity - offset < static_cast<size_t>(dst_size))
+    return false;
+
+  memcpy(dst, src_data + offset, dst_size);
+  return true;
+}
+
+}  // namespace media