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Export scalability mode helper APIs.

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This will help to reduce redundant ScalabilityMode to temporal layer
count mapping in blink.

Bug: chromium:40763991
Change-Id: Ida3e6abb91383e27465eb1b697ad9431935cf9ff
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/362486
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Jianlin Qiu <jianlin.qiu@intel.com>
Cr-Commit-Position: refs/heads/main@{#43031}
This commit is contained in:
Qiu Jianlin 2024-09-13 16:10:32 +08:00 committed by WebRTC LUCI CQ
parent 4b51217ef6
commit 295758848c
2 changed files with 5 additions and 3 deletions
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1
api/video_codecs/BUILD.gn
View File

@ -34,6 +34,7 @@ rtc_source_set("scalability_mode_helper") {
deps = [
":scalability_mode",
"../../modules/video_coding/svc:scalability_mode_util",
"../../rtc_base/system:rtc_export",
"//third_party/abseil-cpp/absl/strings:string_view",
]
}

7
api/video_codecs/scalability_mode_helper.h
View File

@ -15,22 +15,23 @@
#include "absl/strings/string_view.h"
#include "api/video_codecs/scalability_mode.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// Returns the number of spatial layers from the `scalability_mode_string`
// or nullopt if the given mode is unknown.
std::optional<int> ScalabilityModeStringToNumSpatialLayers(
RTC_EXPORT std::optional<int> ScalabilityModeStringToNumSpatialLayers(
absl::string_view scalability_mode_string);
// Returns the number of temporal layers from the `scalability_mode_string`
// or nullopt if the given mode is unknown.
std::optional<int> ScalabilityModeStringToNumTemporalLayers(
RTC_EXPORT std::optional<int> ScalabilityModeStringToNumTemporalLayers(
absl::string_view scalability_mode_string);
// Convert the `scalability_mode_string` to the scalability mode enum value
// or nullopt if the given mode is unknown.
std::optional<ScalabilityMode> ScalabilityModeStringToEnum(
RTC_EXPORT std::optional<ScalabilityMode> ScalabilityModeStringToEnum(
absl::string_view scalability_mode_string);
} // namespace webrtc