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media / base / svc_scalability_mode.cc [blame]
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "media/base/svc_scalability_mode.h"
#include <algorithm>
#include "base/check_op.h"
#include "base/notreached.h"
namespace media {
namespace {
constexpr SVCScalabilityMode kSVCScalabilityModeMap[3][3][3] = {
// kOff.
{
{SVCScalabilityMode::kL1T1, SVCScalabilityMode::kL1T2,
SVCScalabilityMode::kL1T3},
{SVCScalabilityMode::kS2T1, SVCScalabilityMode::kS2T2,
SVCScalabilityMode::kS2T3},
{SVCScalabilityMode::kS3T1, SVCScalabilityMode::kS3T2,
SVCScalabilityMode::kS3T3},
},
// kOn.
{
{SVCScalabilityMode::kL1T1, SVCScalabilityMode::kL1T2,
SVCScalabilityMode::kL1T3},
{SVCScalabilityMode::kL2T1, SVCScalabilityMode::kL2T2,
SVCScalabilityMode::kL2T3},
{SVCScalabilityMode::kL3T1, SVCScalabilityMode::kL3T2,
SVCScalabilityMode::kL3T3},
},
// kOnKeyPic.
{
{SVCScalabilityMode::kL1T1, SVCScalabilityMode::kL1T2,
SVCScalabilityMode::kL1T3},
{SVCScalabilityMode::kL2T1Key, SVCScalabilityMode::kL2T2Key,
SVCScalabilityMode::kL2T3Key},
{SVCScalabilityMode::kL3T1Key, SVCScalabilityMode::kL3T2Key,
SVCScalabilityMode::kL3T3Key},
}};
} // namespace
std::vector<SVCScalabilityMode>
GetSupportedScalabilityModesByHWEncoderForTesting() {
constexpr size_t kSVCMapSize =
sizeof(kSVCScalabilityModeMap) / sizeof(SVCScalabilityMode);
std::vector<SVCScalabilityMode> supported_svcs(
&kSVCScalabilityModeMap[0][0][0],
(&kSVCScalabilityModeMap[0][0][0]) + kSVCMapSize);
std::sort(supported_svcs.begin(), supported_svcs.end());
supported_svcs.erase(
std::unique(supported_svcs.begin(), supported_svcs.end()),
supported_svcs.end());
CHECK_EQ(supported_svcs.size(), 21u);
return supported_svcs;
}
SVCScalabilityMode GetSVCScalabilityMode(
const size_t num_spatial_layers,
const size_t num_temporal_layers,
SVCInterLayerPredMode inter_layer_pred) {
constexpr SVCScalabilityMode kInvalid = static_cast<SVCScalabilityMode>(-1);
CHECK(0 < num_spatial_layers && num_spatial_layers <= 3);
CHECK(0 < num_temporal_layers && num_temporal_layers <= 3);
CHECK(static_cast<int>(inter_layer_pred) >= 0 &&
static_cast<int>(inter_layer_pred) < 3);
auto mode =
kSVCScalabilityModeMap[static_cast<int>(inter_layer_pred)]
[num_spatial_layers - 1][num_temporal_layers - 1];
CHECK_NE(mode, kInvalid);
return mode;
}
const char* GetScalabilityModeName(SVCScalabilityMode scalability_mode) {
switch (scalability_mode) {
case SVCScalabilityMode::kL1T1:
return "L1T1";
case SVCScalabilityMode::kL1T2:
return "L1T2";
case SVCScalabilityMode::kL1T3:
return "L1T3";
case SVCScalabilityMode::kL2T1:
return "L2T1";
case SVCScalabilityMode::kL2T2:
return "L2T2";
case SVCScalabilityMode::kL2T3:
return "L2T3";
case SVCScalabilityMode::kL3T1:
return "L3T1";
case SVCScalabilityMode::kL3T2:
return "L3T2";
case SVCScalabilityMode::kL3T3:
return "L3T3";
case SVCScalabilityMode::kL2T1h:
return "L2T1h";
case SVCScalabilityMode::kL2T2h:
return "L2T2h";
case SVCScalabilityMode::kL2T3h:
return "L2T3h";
case SVCScalabilityMode::kS2T1:
return "S2T1";
case SVCScalabilityMode::kS2T2:
return "S2T2";
case SVCScalabilityMode::kS2T3:
return "S2T3";
case SVCScalabilityMode::kS2T1h:
return "S2T1h";
case SVCScalabilityMode::kS2T2h:
return "S2T2h";
case SVCScalabilityMode::kS2T3h:
return "S2T3h";
case SVCScalabilityMode::kS3T1:
return "S3T1";
case SVCScalabilityMode::kS3T2:
return "S3T2";
case SVCScalabilityMode::kS3T3:
return "S3T3";
case SVCScalabilityMode::kS3T1h:
return "S3T1h";
case SVCScalabilityMode::kS3T2h:
return "S3T2h";
case SVCScalabilityMode::kS3T3h:
return "S3T3h";
case SVCScalabilityMode::kL2T1Key:
return "L2T1_KEY";
case SVCScalabilityMode::kL2T2Key:
return "L2T2_KEY";
case SVCScalabilityMode::kL2T2KeyShift:
return "L2T2_KEY_SHIFT";
case SVCScalabilityMode::kL2T3Key:
return "L2T3_KEY";
case SVCScalabilityMode::kL2T3KeyShift:
return "L2T3_KEY_SHIFT";
case SVCScalabilityMode::kL3T1Key:
return "L3T1_KEY";
case SVCScalabilityMode::kL3T2Key:
return "L3T2_KEY";
case SVCScalabilityMode::kL3T2KeyShift:
return "L3T2_KEY_SHIFT";
case SVCScalabilityMode::kL3T3Key:
return "L3T3_KEY";
case SVCScalabilityMode::kL3T3KeyShift:
return "L3T3_KEY_SHIFT";
case SVCScalabilityMode::kL3T1h:
return "L3T1h";
case SVCScalabilityMode::kL3T2h:
return "L3T2h";
case SVCScalabilityMode::kL3T3h:
return "L3T3h";
}
NOTREACHED();
}
} // namespace media