| // Copyright 2019 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. |
| |
| // This file defines all configuration constants for a platform. |
| |
| #include "starboard/configuration_constants.h" |
| |
| // Determines the threshhold of allocation size that should be done with mmap |
| // (if available), rather than allocated within the core heap. |
| const size_t kSbDefaultMmapThreshold = 256 * 1024U; |
| |
| // The current platform's maximum length of the name of a single directory |
| // entry, not including the absolute path. |
| const int32_t kSbFileMaxName = 64; |
| |
| // The current platform's maximum number of files that can be opened at the |
| // same time by one process. |
| const uint32_t kSbFileMaxOpen = 64; |
| |
| // The current platform's alternate file path component separator character. |
| // This is like SB_FILE_SEP_CHAR, except if your platform supports an alternate |
| // character, then you can place that here. For example, on windows machines, |
| // the primary separator character is probably '\', but the alternate is '/'. |
| const char kSbFileAltSepChar = '/'; |
| |
| // The string form of SB_FILE_ALT_SEP_CHAR. |
| const char* kSbFileAltSepString = "/"; |
| |
| // The current platform's maximum length of an absolute path. |
| const uint32_t kSbFileMaxPath = 4096; |
| |
| // The current platform's file path component separator character. This is the |
| // character that appears after a directory in a file path. For example, the |
| // absolute canonical path of the file "/path/to/a/file.txt" uses '/' as a path |
| // component separator character. |
| const char kSbFileSepChar = '/'; |
| |
| // The string form of SB_FILE_SEP_CHAR. |
| const char* kSbFileSepString = "/"; |
| |
| // Allow ac3 and ec3 support |
| const bool kSbHasAc3Audio = true; |
| |
| // Specifies whether this platform has webm/vp9 support. This should be set to |
| // non-zero on platforms with webm/vp9 support. |
| const bool kSbHasMediaWebmVp9Support = false; |
| |
| // Whether the current platform supports thread priorities. |
| const bool kSbHasThreadPrioritySupport = false; |
| |
| // Determines the alignment that allocations should have on this platform. |
| const size_t kSbMallocAlignment = 16; |
| |
| // The maximum number of thread local storage keys supported by this platform. |
| const uint32_t kSbMaxThreadLocalKeys = 512; |
| |
| // The maximum length of a name for a thread, including the NULL-terminator. |
| const int32_t kSbMaxThreadNameLength = 16; |
| |
| // Defines the path where memory debugging logs should be written to. |
| const char* kSbMemoryLogPath = "/tmp/starboard"; |
| |
| // The maximum audio bitrate the platform can decode. The following value |
| // equals to 5M bytes per seconds which is more than enough for compressed |
| // audio. |
| const uint32_t kSbMediaMaxAudioBitrateInBitsPerSecond = 40 * 1024 * 1024; |
| |
| // The maximum video bitrate the platform can decode. The following value |
| // equals to 25M bytes per seconds which is more than enough for compressed |
| // video. |
| const uint32_t kSbMediaMaxVideoBitrateInBitsPerSecond = 200 * 1024 * 1024; |
| |
| // Specify the number of video frames to be cached during playback. A large |
| // value leads to more stable fps but also causes the app to use more memory. |
| const uint32_t kSbMediaMaximumVideoFrames = 12; |
| |
| // The encoded video frames are compressed in different ways, so their decoding |
| // time can vary a lot. Occasionally a single frame can take longer time to |
| // decode than the average time per frame. The player has to cache some frames |
| // to account for such inconsistency. The number of frames being cached are |
| // controlled by SB_MEDIA_MAXIMUM_VIDEO_PREROLL_FRAMES and |
| // SB_MEDIA_MAXIMUM_VIDEO_FRAMES. |
| // |
| // Specify the number of video frames to be cached before the playback starts. |
| // Note that setting this value too large may increase the playback start delay. |
| const uint32_t kSbMediaMaximumVideoPrerollFrames = 4; |
| |
| // Specifies how video frame buffers must be aligned on this platform. |
| const uint32_t kSbMediaVideoFrameAlignment = 256; |
| |
| // The memory page size, which controls the size of chunks on memory that |
| // allocators deal with, and the alignment of those chunks. This doesn't have to |
| // be the hardware-defined physical page size, but it should be a multiple of |
| // it. |
| const size_t kSbMemoryPageSize = 4096; |
| |
| // Specifies the network receive buffer size in bytes, set via |
| // SbSocketSetReceiveBufferSize(). |
| // |
| // Setting this to 0 indicates that SbSocketSetReceiveBufferSize() should |
| // not be called. Use this for OSs (such as Linux) where receive buffer |
| // auto-tuning is better. |
| // |
| // On some platforms, this may affect max TCP window size which may |
| // dramatically affect throughput in the presence of latency. |
| // |
| // If your platform does not have a good TCP auto-tuning mechanism, |
| // a setting of (128 * 1024) here is recommended. |
| const uint32_t kSbNetworkReceiveBufferSize = 0; |
| |
| // Defines the maximum number of simultaneous threads for this platform. Some |
| // platforms require sharing thread handles with other kinds of system handles, |
| // like mutexes, so we want to keep this managable. |
| const uint32_t kSbMaxThreads = 90; |
| |
| // The current platform's search path component separator character. When |
| // specifying an ordered list of absolute paths of directories to search for a |
| // given reason, this is the character that appears between entries. For |
| // example, the search path of "/etc/search/first:/etc/search/second" uses ':' |
| // as a search path component separator character. |
| const char kSbPathSepChar = ':'; |
| |
| // The string form of SB_PATH_SEP_CHAR. |
| const char* kSbPathSepString = ":"; |
| |
| // Specifies the preferred byte order of color channels in a pixel. Refer to |
| // starboard/configuration.h for the possible values. EGL/GLES platforms should |
| // generally prefer a byte order of RGBA, regardless of endianness. |
| const int kSbPreferredRgbaByteOrder = SB_PREFERRED_RGBA_BYTE_ORDER_RGBA; |
| |
| // The maximum number of users that can be signed in at the same time. |
| const uint32_t kSbUserMaxSignedIn = 1; |