| // Copyright 2021 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/capture/video/video_capture_buffer_pool_util.h" |
| |
| #include "build/build_config.h" |
| #include "build/chromeos_buildflags.h" |
| #include "media/capture/capture_switches.h" |
| |
| namespace media { |
| |
| int DeviceVideoCaptureMaxBufferPoolSize() { |
| // The maximum number of video frame buffers in-flight at any one time. |
| // If all buffers are still in use by consumers when new frames are produced |
| // those frames get dropped. |
| static int max_buffer_count = kVideoCaptureDefaultMaxBufferPoolSize; |
| |
| #if defined(OS_MAC) |
| // On macOS, we allow a few more buffers as it's routinely observed that it |
| // runs out of three when just displaying 60 FPS media in a video element. |
| max_buffer_count = 10; |
| #elif BUILDFLAG(IS_CHROMEOS_ASH) |
| // On Chrome OS with MIPI cameras running on HAL v3, there can be four |
| // concurrent streams of camera pipeline depth ~6. We allow at most 36 buffers |
| // here to take into account the delay caused by the consumer (e.g. display or |
| // video encoder). |
| if (switches::IsVideoCaptureUseGpuMemoryBufferEnabled()) { |
| max_buffer_count = 36; |
| } |
| #elif defined(OS_WIN) |
| // On Windows, for GMB backed zero-copy more buffers are needed because it's |
| // routinely observed that it runs out of default buffer count when just |
| // displaying 60 FPS media in a video element |
| if (switches::IsVideoCaptureUseGpuMemoryBufferEnabled()) { |
| max_buffer_count = 30; |
| } |
| #endif |
| |
| return max_buffer_count; |
| } |
| |
| } // namespace media |
