src/starboard/shared/starboard/media/media_get_video_buffer_budget.cc

// Copyright 2018 The Cobalt Authors. All Rights Reserved.
//
// 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 "starboard/media.h"

#include "starboard/common/log.h"

#if SB_API_VERSION >= 10
// These are the legacy default values of the GYP variables.
#define LEGACY_VIDEO_BUDGET_1080P 30 * 1024 * 1024
#define LEGACY_VIDEO_BUDGET_4K 100 * 1024 * 1024

int SbMediaGetVideoBufferBudget(SbMediaVideoCodec codec,
                                int resolution_width,
                                int resolution_height,
                                int bits_per_pixel) {
  SB_UNREFERENCED_PARAMETER(codec);
  if ((resolution_width <= 1920 && resolution_height <= 1080) ||
      resolution_width == kSbMediaVideoResolutionDimensionInvalid ||
      resolution_height == kSbMediaVideoResolutionDimensionInvalid) {
    // Specifies the maximum amount of memory used by video buffers of media
    // source before triggering a garbage collection when the video resolution
    // is lower than 1080p (1920x1080).
#if defined(COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P) && \
    COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P != LEGACY_VIDEO_BUDGET_1080P
    SB_DLOG(WARNING) << "COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P will be "
                        "deprecated in a future Starboard version.";
    // Use define forwarded from GYP variable.
    return COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P;
#else   // defined(COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P) &&
    // COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P != LEGACY_VIDEO_BUDGET_1080P
    return 30 * 1024 * 1024;
#endif  // defined(COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P) &&
        // COBALT_MEDIA_BUFFER_VIDEO_BUDGET_1080P != LEGACY_VIDEO_BUDGET_1080P
  }

  if (resolution_width <= 3840 && resolution_height <= 2160) {
    if (bits_per_pixel <= 8) {
      // Specifies the maximum amount of memory used by video buffers of media
      // source before triggering a garbage collection when the video resolution
      // is lower than 4k (3840x2160) and bit per pixel is lower than 8.
#if defined(COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K) && \
    COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K != LEGACY_VIDEO_BUDGET_4K
      SB_DLOG(WARNING) << "COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K will be "
                          "deprecated in a future Starboard version.";
      // Use define forwarded from GYP variable.
      return COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K;
#else   // defined(COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K) &&
      // COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K != LEGACY_VIDEO_BUDGET_4K
      return 100 * 1024 * 1024;
#endif  // defined(COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K) &&
        // COBALT_MEDIA_BUFFER_VIDEO_BUDGET_4K != LEGACY_VIDEO_BUDGET_4K
    } else {
      // Specifies the maximum amount of memory used by video buffers of media
      // source before triggering a garbage collection when video resolution is
      // lower than 4k (3840x2160) and bit per pixel is greater than 8.
      return 160 * 1024 * 1024;
    }
  }

  // Specifies the maximum amount of memory used by video buffers of media
  // source before triggering a garbage collection when the video resolution is
  // lower than 8k (7680x4320).
  return 300 * 1024 * 1024;
}
#endif  // SB_API_VERSION >= 10