blob: 35d66df203f0fe62f8c611d67e867e1385624be0 [file] [log] [blame]
/*
* Copyright (c) 2022 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/video_coding/svc/scalability_mode_util.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "api/video_codecs/scalability_mode.h"
#include "rtc_base/checks.h"
namespace webrtc {
absl::optional<ScalabilityMode> ScalabilityModeFromString(
absl::string_view mode_string) {
if (mode_string == "L1T1")
return ScalabilityMode::kL1T1;
if (mode_string == "L1T2")
return ScalabilityMode::kL1T2;
if (mode_string == "L1T3")
return ScalabilityMode::kL1T3;
if (mode_string == "L2T1")
return ScalabilityMode::kL2T1;
if (mode_string == "L2T1h")
return ScalabilityMode::kL2T1h;
if (mode_string == "L2T1_KEY")
return ScalabilityMode::kL2T1_KEY;
if (mode_string == "L2T2")
return ScalabilityMode::kL2T2;
if (mode_string == "L2T2h")
return ScalabilityMode::kL2T2h;
if (mode_string == "L2T2_KEY")
return ScalabilityMode::kL2T2_KEY;
if (mode_string == "L2T2_KEY_SHIFT")
return ScalabilityMode::kL2T2_KEY_SHIFT;
if (mode_string == "L2T3")
return ScalabilityMode::kL2T3;
if (mode_string == "L2T3h")
return ScalabilityMode::kL2T3h;
if (mode_string == "L2T3_KEY")
return ScalabilityMode::kL2T3_KEY;
if (mode_string == "L3T1")
return ScalabilityMode::kL3T1;
if (mode_string == "L3T1h")
return ScalabilityMode::kL3T1h;
if (mode_string == "L3T1_KEY")
return ScalabilityMode::kL3T1_KEY;
if (mode_string == "L3T2")
return ScalabilityMode::kL3T2;
if (mode_string == "L3T2h")
return ScalabilityMode::kL3T2h;
if (mode_string == "L3T2_KEY")
return ScalabilityMode::kL3T2_KEY;
if (mode_string == "L3T3")
return ScalabilityMode::kL3T3;
if (mode_string == "L3T3h")
return ScalabilityMode::kL3T3h;
if (mode_string == "L3T3_KEY")
return ScalabilityMode::kL3T3_KEY;
if (mode_string == "S2T1")
return ScalabilityMode::kS2T1;
if (mode_string == "S2T1h")
return ScalabilityMode::kS2T1h;
if (mode_string == "S2T2")
return ScalabilityMode::kS2T2;
if (mode_string == "S2T2h")
return ScalabilityMode::kS2T2h;
if (mode_string == "S2T3")
return ScalabilityMode::kS2T3;
if (mode_string == "S2T3h")
return ScalabilityMode::kS2T3h;
if (mode_string == "S3T1")
return ScalabilityMode::kS3T1;
if (mode_string == "S3T1h")
return ScalabilityMode::kS3T1h;
if (mode_string == "S3T2")
return ScalabilityMode::kS3T2;
if (mode_string == "S3T2h")
return ScalabilityMode::kS3T2h;
if (mode_string == "S3T3")
return ScalabilityMode::kS3T3;
if (mode_string == "S3T3h")
return ScalabilityMode::kS3T3h;
return absl::nullopt;
}
InterLayerPredMode ScalabilityModeToInterLayerPredMode(
ScalabilityMode scalability_mode) {
switch (scalability_mode) {
case ScalabilityMode::kL1T1:
case ScalabilityMode::kL1T2:
case ScalabilityMode::kL1T3:
case ScalabilityMode::kL2T1:
case ScalabilityMode::kL2T1h:
return InterLayerPredMode::kOn;
case ScalabilityMode::kL2T1_KEY:
return InterLayerPredMode::kOnKeyPic;
case ScalabilityMode::kL2T2:
case ScalabilityMode::kL2T2h:
return InterLayerPredMode::kOn;
case ScalabilityMode::kL2T2_KEY:
case ScalabilityMode::kL2T2_KEY_SHIFT:
return InterLayerPredMode::kOnKeyPic;
case ScalabilityMode::kL2T3:
case ScalabilityMode::kL2T3h:
return InterLayerPredMode::kOn;
case ScalabilityMode::kL2T3_KEY:
return InterLayerPredMode::kOnKeyPic;
case ScalabilityMode::kL3T1:
case ScalabilityMode::kL3T1h:
return InterLayerPredMode::kOn;
case ScalabilityMode::kL3T1_KEY:
return InterLayerPredMode::kOnKeyPic;
case ScalabilityMode::kL3T2:
case ScalabilityMode::kL3T2h:
return InterLayerPredMode::kOn;
case ScalabilityMode::kL3T2_KEY:
return InterLayerPredMode::kOnKeyPic;
case ScalabilityMode::kL3T3:
case ScalabilityMode::kL3T3h:
return InterLayerPredMode::kOn;
case ScalabilityMode::kL3T3_KEY:
return InterLayerPredMode::kOnKeyPic;
case ScalabilityMode::kS2T1:
case ScalabilityMode::kS2T1h:
case ScalabilityMode::kS2T2:
case ScalabilityMode::kS2T2h:
case ScalabilityMode::kS2T3:
case ScalabilityMode::kS2T3h:
case ScalabilityMode::kS3T1:
case ScalabilityMode::kS3T1h:
case ScalabilityMode::kS3T2:
case ScalabilityMode::kS3T2h:
case ScalabilityMode::kS3T3:
case ScalabilityMode::kS3T3h:
return InterLayerPredMode::kOff;
}
RTC_CHECK_NOTREACHED();
}
int ScalabilityModeToNumSpatialLayers(ScalabilityMode scalability_mode) {
switch (scalability_mode) {
case ScalabilityMode::kL1T1:
case ScalabilityMode::kL1T2:
case ScalabilityMode::kL1T3:
return 1;
case ScalabilityMode::kL2T1:
case ScalabilityMode::kL2T1h:
case ScalabilityMode::kL2T1_KEY:
case ScalabilityMode::kL2T2:
case ScalabilityMode::kL2T2h:
case ScalabilityMode::kL2T2_KEY:
case ScalabilityMode::kL2T2_KEY_SHIFT:
case ScalabilityMode::kL2T3:
case ScalabilityMode::kL2T3h:
case ScalabilityMode::kL2T3_KEY:
return 2;
case ScalabilityMode::kL3T1:
case ScalabilityMode::kL3T1h:
case ScalabilityMode::kL3T1_KEY:
case ScalabilityMode::kL3T2:
case ScalabilityMode::kL3T2h:
case ScalabilityMode::kL3T2_KEY:
case ScalabilityMode::kL3T3:
case ScalabilityMode::kL3T3h:
case ScalabilityMode::kL3T3_KEY:
return 3;
case ScalabilityMode::kS2T1:
case ScalabilityMode::kS2T1h:
case ScalabilityMode::kS2T2:
case ScalabilityMode::kS2T2h:
case ScalabilityMode::kS2T3:
case ScalabilityMode::kS2T3h:
return 2;
case ScalabilityMode::kS3T1:
case ScalabilityMode::kS3T1h:
case ScalabilityMode::kS3T2:
case ScalabilityMode::kS3T2h:
case ScalabilityMode::kS3T3:
case ScalabilityMode::kS3T3h:
return 3;
}
RTC_CHECK_NOTREACHED();
}
int ScalabilityModeToNumTemporalLayers(ScalabilityMode scalability_mode) {
switch (scalability_mode) {
case ScalabilityMode::kL1T1:
return 1;
case ScalabilityMode::kL1T2:
return 2;
case ScalabilityMode::kL1T3:
return 3;
case ScalabilityMode::kL2T1:
case ScalabilityMode::kL2T1h:
case ScalabilityMode::kL2T1_KEY:
return 1;
case ScalabilityMode::kL2T2:
case ScalabilityMode::kL2T2h:
case ScalabilityMode::kL2T2_KEY:
case ScalabilityMode::kL2T2_KEY_SHIFT:
return 2;
case ScalabilityMode::kL2T3:
case ScalabilityMode::kL2T3h:
case ScalabilityMode::kL2T3_KEY:
return 3;
case ScalabilityMode::kL3T1:
case ScalabilityMode::kL3T1h:
case ScalabilityMode::kL3T1_KEY:
return 1;
case ScalabilityMode::kL3T2:
case ScalabilityMode::kL3T2h:
case ScalabilityMode::kL3T2_KEY:
return 2;
case ScalabilityMode::kL3T3:
case ScalabilityMode::kL3T3h:
case ScalabilityMode::kL3T3_KEY:
return 3;
case ScalabilityMode::kS2T1:
case ScalabilityMode::kS2T1h:
case ScalabilityMode::kS3T1:
case ScalabilityMode::kS3T1h:
return 1;
case ScalabilityMode::kS2T2:
case ScalabilityMode::kS2T2h:
case ScalabilityMode::kS3T2:
case ScalabilityMode::kS3T2h:
return 2;
case ScalabilityMode::kS2T3:
case ScalabilityMode::kS2T3h:
case ScalabilityMode::kS3T3:
case ScalabilityMode::kS3T3h:
return 3;
}
RTC_CHECK_NOTREACHED();
}
absl::optional<ScalabilityModeResolutionRatio> ScalabilityModeToResolutionRatio(
ScalabilityMode scalability_mode) {
switch (scalability_mode) {
case ScalabilityMode::kL1T1:
case ScalabilityMode::kL1T2:
case ScalabilityMode::kL1T3:
return absl::nullopt;
case ScalabilityMode::kL2T1:
case ScalabilityMode::kL2T1_KEY:
case ScalabilityMode::kL2T2:
case ScalabilityMode::kL2T2_KEY:
case ScalabilityMode::kL2T2_KEY_SHIFT:
case ScalabilityMode::kL2T3:
case ScalabilityMode::kL2T3_KEY:
case ScalabilityMode::kL3T1:
case ScalabilityMode::kL3T1_KEY:
case ScalabilityMode::kL3T2:
case ScalabilityMode::kL3T2_KEY:
case ScalabilityMode::kL3T3:
case ScalabilityMode::kL3T3_KEY:
case ScalabilityMode::kS2T1:
case ScalabilityMode::kS2T2:
case ScalabilityMode::kS2T3:
case ScalabilityMode::kS3T1:
case ScalabilityMode::kS3T2:
case ScalabilityMode::kS3T3:
return ScalabilityModeResolutionRatio::kTwoToOne;
case ScalabilityMode::kL2T1h:
case ScalabilityMode::kL2T2h:
case ScalabilityMode::kL2T3h:
case ScalabilityMode::kL3T1h:
case ScalabilityMode::kL3T2h:
case ScalabilityMode::kL3T3h:
case ScalabilityMode::kS2T1h:
case ScalabilityMode::kS2T2h:
case ScalabilityMode::kS2T3h:
case ScalabilityMode::kS3T1h:
case ScalabilityMode::kS3T2h:
case ScalabilityMode::kS3T3h:
return ScalabilityModeResolutionRatio::kThreeToTwo;
}
RTC_CHECK_NOTREACHED();
}
ScalabilityMode LimitNumSpatialLayers(ScalabilityMode scalability_mode,
int max_spatial_layers) {
int num_spatial_layers = ScalabilityModeToNumSpatialLayers(scalability_mode);
if (max_spatial_layers >= num_spatial_layers) {
return scalability_mode;
}
switch (scalability_mode) {
case ScalabilityMode::kL1T1:
return ScalabilityMode::kL1T1;
case ScalabilityMode::kL1T2:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kL1T3:
return ScalabilityMode::kL1T3;
case ScalabilityMode::kL2T1:
return ScalabilityMode::kL1T1;
case ScalabilityMode::kL2T1h:
return ScalabilityMode::kL1T1;
case ScalabilityMode::kL2T1_KEY:
return ScalabilityMode::kL1T1;
case ScalabilityMode::kL2T2:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kL2T2h:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kL2T2_KEY:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kL2T2_KEY_SHIFT:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kL2T3:
return ScalabilityMode::kL1T3;
case ScalabilityMode::kL2T3h:
return ScalabilityMode::kL1T3;
case ScalabilityMode::kL2T3_KEY:
return ScalabilityMode::kL1T3;
case ScalabilityMode::kL3T1:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T1
: ScalabilityMode::kL1T1;
case ScalabilityMode::kL3T1h:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T1h
: ScalabilityMode::kL1T1;
case ScalabilityMode::kL3T1_KEY:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T1_KEY
: ScalabilityMode::kL1T1;
case ScalabilityMode::kL3T2:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T2
: ScalabilityMode::kL1T2;
case ScalabilityMode::kL3T2h:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T2h
: ScalabilityMode::kL1T2;
case ScalabilityMode::kL3T2_KEY:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T2_KEY
: ScalabilityMode::kL1T2;
case ScalabilityMode::kL3T3:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T3
: ScalabilityMode::kL1T3;
case ScalabilityMode::kL3T3h:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T3h
: ScalabilityMode::kL1T3;
case ScalabilityMode::kL3T3_KEY:
return max_spatial_layers == 2 ? ScalabilityMode::kL2T3_KEY
: ScalabilityMode::kL1T3;
case ScalabilityMode::kS2T1:
return ScalabilityMode::kL1T1;
case ScalabilityMode::kS2T1h:
return ScalabilityMode::kL1T1;
case ScalabilityMode::kS2T2:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kS2T2h:
return ScalabilityMode::kL1T2;
case ScalabilityMode::kS2T3:
return ScalabilityMode::kL1T3;
case ScalabilityMode::kS2T3h:
return ScalabilityMode::kL1T3;
case ScalabilityMode::kS3T1:
return max_spatial_layers == 2 ? ScalabilityMode::kS2T1
: ScalabilityMode::kL1T1;
case ScalabilityMode::kS3T1h:
return max_spatial_layers == 2 ? ScalabilityMode::kS2T1h
: ScalabilityMode::kL1T1;
case ScalabilityMode::kS3T2:
return max_spatial_layers == 2 ? ScalabilityMode::kS2T2
: ScalabilityMode::kL1T2;
case ScalabilityMode::kS3T2h:
return max_spatial_layers == 2 ? ScalabilityMode::kS2T2h
: ScalabilityMode::kL1T2;
case ScalabilityMode::kS3T3:
return max_spatial_layers == 2 ? ScalabilityMode::kS2T3
: ScalabilityMode::kL1T3;
case ScalabilityMode::kS3T3h:
return max_spatial_layers == 2 ? ScalabilityMode::kS2T3h
: ScalabilityMode::kL1T3;
}
RTC_CHECK_NOTREACHED();
}
} // namespace webrtc