| // Copyright 2020 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. |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "V4L2EncodeInterface" |
| |
| #include <v4l2_codec2/components/V4L2EncodeInterface.h> |
| |
| #include <inttypes.h> |
| #include <algorithm> |
| |
| #include <C2PlatformSupport.h> |
| #include <SimpleC2Interface.h> |
| #include <android/hardware/graphics/common/1.0/types.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <utils/Log.h> |
| |
| #include <v4l2_codec2/common/V4L2ComponentCommon.h> |
| #include <v4l2_codec2/common/V4L2Device.h> |
| #include <v4l2_codec2/common/VideoTypes.h> |
| |
| using android::hardware::graphics::common::V1_0::BufferUsage; |
| |
| namespace android { |
| |
| namespace { |
| |
| // Use basic linear block pool/allocator as default. |
| constexpr C2BlockPool::local_id_t kDefaultOutputBlockPool = C2BlockPool::BASIC_LINEAR; |
| // Default input and output allocators. |
| constexpr C2Allocator::id_t kDefaultInputAllocator = C2PlatformAllocatorStore::GRALLOC; |
| constexpr C2Allocator::id_t kDefaultOutputAllocator = C2PlatformAllocatorStore::BLOB; |
| |
| // The default output framerate in frames per second. |
| // TODO: increase to 60 fps in the future. |
| constexpr float kDefaultFrameRate = 30.0; |
| // The default output bitrate in bits per second. Use the max bitrate of AVC Level1.0 as default. |
| constexpr uint32_t kDefaultBitrate = 64000; |
| |
| // The maximal output bitrate in bits per second. It's the max bitrate of AVC Level4.1. |
| // TODO: increase this in the future for supporting higher level/resolution encoding. |
| constexpr uint32_t kMaxBitrate = 50000000; |
| |
| std::optional<VideoCodec> getCodecFromComponentName(const std::string& name) { |
| if (name == V4L2ComponentName::kH264Encoder) return VideoCodec::H264; |
| if (name == V4L2ComponentName::kVP8Encoder) return VideoCodec::VP8; |
| if (name == V4L2ComponentName::kVP9Encoder) return VideoCodec::VP9; |
| |
| ALOGE("Unknown name: %s", name.c_str()); |
| return std::nullopt; |
| } |
| |
| // Check whether the specified profile is a valid profile for the specified codec. |
| bool IsValidProfileForCodec(VideoCodec codec, C2Config::profile_t profile) { |
| switch (codec) { |
| case VideoCodec::H264: |
| return ((profile >= C2Config::PROFILE_AVC_BASELINE) && |
| (profile <= C2Config::PROFILE_AVC_ENHANCED_MULTIVIEW_DEPTH_HIGH)); |
| case VideoCodec::VP8: |
| return ((profile >= C2Config::PROFILE_VP8_0) && (profile <= C2Config::PROFILE_VP8_3)); |
| case VideoCodec::VP9: |
| return ((profile >= C2Config::PROFILE_VP9_0) && (profile <= C2Config::PROFILE_VP9_3)); |
| default: |
| return false; |
| } |
| } |
| |
| } // namespace |
| |
| // static |
| C2R V4L2EncodeInterface::H264ProfileLevelSetter( |
| bool /*mayBlock*/, C2P<C2StreamProfileLevelInfo::output>& info, |
| const C2P<C2StreamPictureSizeInfo::input>& videoSize, |
| const C2P<C2StreamFrameRateInfo::output>& frameRate, |
| const C2P<C2StreamBitrateInfo::output>& bitrate) { |
| static C2Config::level_t lowestConfigLevel = C2Config::LEVEL_UNUSED; |
| |
| // Adopt default minimal profile instead if the requested profile is not supported, or lower |
| // than the default minimal one. |
| constexpr C2Config::profile_t minProfile = C2Config::PROFILE_AVC_BASELINE; |
| if (!info.F(info.v.profile).supportsAtAll(info.v.profile) || info.v.profile < minProfile) { |
| if (info.F(info.v.profile).supportsAtAll(minProfile)) { |
| ALOGV("Set profile to default (%u) instead.", minProfile); |
| info.set().profile = minProfile; |
| } else { |
| ALOGE("Unable to set either requested profile (%u) or default profile (%u).", |
| info.v.profile, minProfile); |
| return C2R(C2SettingResultBuilder::BadValue(info.F(info.v.profile))); |
| } |
| } |
| |
| // Table A-1 in spec |
| struct LevelLimits { |
| C2Config::level_t level; |
| float maxMBPS; // max macroblock processing rate in macroblocks per second |
| uint64_t maxFS; // max frame size in macroblocks |
| uint32_t maxBR; // max video bitrate in bits per second |
| }; |
| constexpr LevelLimits kLimits[] = { |
| {C2Config::LEVEL_AVC_1, 1485, 99, 64000}, |
| {C2Config::LEVEL_AVC_1B, 1485, 99, 128000}, |
| {C2Config::LEVEL_AVC_1_1, 3000, 396, 192000}, |
| {C2Config::LEVEL_AVC_1_2, 6000, 396, 384000}, |
| {C2Config::LEVEL_AVC_1_3, 11880, 396, 768000}, |
| {C2Config::LEVEL_AVC_2, 11880, 396, 2000000}, |
| {C2Config::LEVEL_AVC_2_1, 19800, 792, 4000000}, |
| {C2Config::LEVEL_AVC_2_2, 20250, 1620, 4000000}, |
| {C2Config::LEVEL_AVC_3, 40500, 1620, 10000000}, |
| {C2Config::LEVEL_AVC_3_1, 108000, 3600, 14000000}, |
| {C2Config::LEVEL_AVC_3_2, 216000, 5120, 20000000}, |
| {C2Config::LEVEL_AVC_4, 245760, 8192, 20000000}, |
| {C2Config::LEVEL_AVC_4_1, 245760, 8192, 50000000}, |
| {C2Config::LEVEL_AVC_4_2, 522240, 8704, 50000000}, |
| {C2Config::LEVEL_AVC_5, 589824, 22080, 135000000}, |
| {C2Config::LEVEL_AVC_5_1, 983040, 36864, 240000000}, |
| {C2Config::LEVEL_AVC_5_2, 2073600, 36864, 240000000}, |
| }; |
| |
| uint64_t targetFS = |
| static_cast<uint64_t>((videoSize.v.width + 15) / 16) * ((videoSize.v.height + 15) / 16); |
| float targetMBPS = static_cast<float>(targetFS) * frameRate.v.value; |
| |
| // Try the recorded lowest configed level. This level should become adaptable after input size, |
| // frame rate, and bitrate are all set. |
| if (lowestConfigLevel != C2Config::LEVEL_UNUSED && lowestConfigLevel < info.v.level) { |
| info.set().level = lowestConfigLevel; |
| } |
| |
| // Check if the supplied level meets the requirements. If not, update the level with the lowest |
| // level meeting the requirements. |
| |
| bool found = false; |
| bool needsUpdate = !info.F(info.v.level).supportsAtAll(info.v.level); |
| for (const LevelLimits& limit : kLimits) { |
| if (!info.F(info.v.level).supportsAtAll(limit.level)) { |
| continue; |
| } |
| |
| // Table A-2 in spec |
| // The maximum bit rate for High Profile is 1.25 times that of the Base/Extended/Main |
| // Profiles, 3 times for Hi10P, and 4 times for Hi422P/Hi444PP. |
| uint32_t maxBR = limit.maxBR; |
| if (info.v.profile >= C2Config::PROFILE_AVC_HIGH_422) { |
| maxBR *= 4; |
| } else if (info.v.profile >= C2Config::PROFILE_AVC_HIGH_10) { |
| maxBR *= 3; |
| } else if (info.v.profile >= C2Config::PROFILE_AVC_HIGH) { |
| maxBR = maxBR * 5.0 / 4.0; |
| } |
| |
| if (targetFS <= limit.maxFS && targetMBPS <= limit.maxMBPS && bitrate.v.value <= maxBR) { |
| // This is the lowest level that meets the requirements, and if |
| // we haven't seen the supplied level yet, that means we don't |
| // need the update. |
| if (needsUpdate) { |
| // Since current config update is sequential, there is an issue when we want to set |
| // lower level for small input size, frame rate, and bitrate, if we set level first, |
| // it will be adjusted to a higher one because the default input size or others are |
| // above the limit. Use lowestConfigLevel to record the level we have tried to |
| // config (but failed). |
| // TODO(johnylin): remove this solution after b/140407694 has proper fix. |
| lowestConfigLevel = info.v.level; |
| |
| ALOGD("Given level %u does not cover current configuration: " |
| "adjusting to %u", |
| info.v.level, limit.level); |
| info.set().level = limit.level; |
| } |
| found = true; |
| break; |
| } |
| if (info.v.level <= limit.level) { |
| // We break out of the loop when the lowest feasible level is found. The fact that we're |
| // here means that our level doesn't meet the requirement and needs to be updated. |
| needsUpdate = true; |
| } |
| } |
| if (!found) { |
| ALOGE("Unable to find proper level with current config, requested level (%u).", |
| info.v.level); |
| return C2R(C2SettingResultBuilder::BadValue(info.F(info.v.level))); |
| } |
| |
| return C2R::Ok(); |
| } |
| |
| C2R V4L2EncodeInterface::VP9ProfileLevelSetter( |
| bool /*mayBlock*/, C2P<C2StreamProfileLevelInfo::output>& info, |
| const C2P<C2StreamPictureSizeInfo::input>& /*videoSize*/, |
| const C2P<C2StreamFrameRateInfo::output>& /*frameRate*/, |
| const C2P<C2StreamBitrateInfo::output>& /*bitrate*/) { |
| // Adopt default minimal profile instead if the requested profile is not supported, or lower |
| // than the default minimal one. |
| constexpr C2Config::profile_t defaultMinProfile = C2Config::PROFILE_VP9_0; |
| if (!info.F(info.v.profile).supportsAtAll(info.v.profile) || |
| info.v.profile < defaultMinProfile) { |
| if (info.F(info.v.profile).supportsAtAll(defaultMinProfile)) { |
| ALOGV("Set profile to default (%u) instead.", defaultMinProfile); |
| info.set().profile = defaultMinProfile; |
| } else { |
| ALOGE("Unable to set either requested profile (%u) or default profile (%u).", |
| info.v.profile, defaultMinProfile); |
| return C2R(C2SettingResultBuilder::BadValue(info.F(info.v.profile))); |
| } |
| } |
| |
| return C2R::Ok(); |
| } |
| |
| // static |
| C2R V4L2EncodeInterface::SizeSetter(bool mayBlock, C2P<C2StreamPictureSizeInfo::input>& videoSize) { |
| (void)mayBlock; |
| // TODO: maybe apply block limit? |
| return videoSize.F(videoSize.v.width) |
| .validatePossible(videoSize.v.width) |
| .plus(videoSize.F(videoSize.v.height).validatePossible(videoSize.v.height)); |
| } |
| |
| // static |
| C2R V4L2EncodeInterface::IntraRefreshPeriodSetter(bool mayBlock, |
| C2P<C2StreamIntraRefreshTuning::output>& period) { |
| (void)mayBlock; |
| if (period.v.period < 1) { |
| period.set().mode = C2Config::INTRA_REFRESH_DISABLED; |
| period.set().period = 0; |
| } else { |
| // Only support arbitrary mode (cyclic in our case). |
| period.set().mode = C2Config::INTRA_REFRESH_ARBITRARY; |
| } |
| return C2R::Ok(); |
| } |
| |
| V4L2EncodeInterface::V4L2EncodeInterface(const C2String& name, |
| std::shared_ptr<C2ReflectorHelper> helper) |
| : C2InterfaceHelper(std::move(helper)) { |
| ALOGV("%s(%s)", __func__, name.c_str()); |
| |
| setDerivedInstance(this); |
| |
| Initialize(name); |
| } |
| |
| void V4L2EncodeInterface::Initialize(const C2String& name) { |
| scoped_refptr<V4L2Device> device = V4L2Device::create(); |
| if (!device) { |
| ALOGE("Failed to create V4L2 device"); |
| mInitStatus = C2_CORRUPTED; |
| return; |
| } |
| |
| auto codec = getCodecFromComponentName(name); |
| if (!codec) { |
| ALOGE("Invalid component name"); |
| mInitStatus = C2_BAD_VALUE; |
| return; |
| } |
| |
| V4L2Device::SupportedEncodeProfiles supported_profiles = device->getSupportedEncodeProfiles(); |
| |
| // Compile the list of supported profiles. |
| // Note: unsigned int is used here, since std::vector<C2Config::profile_t> cannot convert to |
| // std::vector<unsigned int> required by the c2 framework below. |
| std::vector<unsigned int> profiles; |
| ui::Size maxSize; |
| for (const auto& supportedProfile : supported_profiles) { |
| if (!IsValidProfileForCodec(codec.value(), supportedProfile.profile)) { |
| continue; // Ignore unrecognizable or unsupported profiles. |
| } |
| ALOGV("Queried c2_profile = 0x%x : max_size = %d x %d", supportedProfile.profile, |
| supportedProfile.max_resolution.width, supportedProfile.max_resolution.height); |
| profiles.push_back(static_cast<unsigned int>(supportedProfile.profile)); |
| maxSize.setWidth(std::max(maxSize.width, supportedProfile.max_resolution.width)); |
| maxSize.setHeight(std::max(maxSize.height, supportedProfile.max_resolution.height)); |
| } |
| |
| if (profiles.empty()) { |
| ALOGE("No supported profiles"); |
| mInitStatus = C2_BAD_VALUE; |
| return; |
| } |
| |
| // Special note: the order of addParameter matters if your setters are dependent on other |
| // parameters. Please make sure the dependent parameters are added prior to the |
| // one needs the setter dependency. |
| |
| addParameter(DefineParam(mKind, C2_PARAMKEY_COMPONENT_KIND) |
| .withConstValue(new C2ComponentKindSetting(C2Component::KIND_ENCODER)) |
| .build()); |
| |
| addParameter(DefineParam(mInputVisibleSize, C2_PARAMKEY_PICTURE_SIZE) |
| .withDefault(new C2StreamPictureSizeInfo::input(0u, 320, 240)) |
| .withFields({ |
| C2F(mInputVisibleSize, width).inRange(2, maxSize.width, 2), |
| C2F(mInputVisibleSize, height).inRange(2, maxSize.height, 2), |
| }) |
| .withSetter(SizeSetter) |
| .build()); |
| |
| addParameter(DefineParam(mFrameRate, C2_PARAMKEY_FRAME_RATE) |
| .withDefault(new C2StreamFrameRateInfo::output(0u, kDefaultFrameRate)) |
| // TODO: More restriction? |
| .withFields({C2F(mFrameRate, value).greaterThan(0.)}) |
| .withSetter(Setter<decltype(*mFrameRate)>::StrictValueWithNoDeps) |
| .build()); |
| |
| addParameter(DefineParam(mBitrate, C2_PARAMKEY_BITRATE) |
| .withDefault(new C2StreamBitrateInfo::output(0u, kDefaultBitrate)) |
| .withFields({C2F(mBitrate, value).inRange(0, kMaxBitrate)}) |
| .withSetter(Setter<decltype(*mBitrate)>::StrictValueWithNoDeps) |
| .build()); |
| |
| addParameter( |
| DefineParam(mBitrateMode, C2_PARAMKEY_BITRATE_MODE) |
| .withDefault(new C2StreamBitrateModeTuning::output(0u, C2Config::BITRATE_CONST)) |
| .withFields( |
| {C2F(mBitrateMode, value) |
| .oneOf({C2Config::BITRATE_CONST, C2Config::BITRATE_VARIABLE})}) |
| .withSetter(Setter<decltype(*mBitrateMode)>::StrictValueWithNoDeps) |
| .build()); |
| |
| std::string outputMime; |
| if (getCodecFromComponentName(name) == VideoCodec::H264) { |
| outputMime = MEDIA_MIMETYPE_VIDEO_AVC; |
| C2Config::profile_t minProfile = static_cast<C2Config::profile_t>( |
| *std::min_element(profiles.begin(), profiles.end())); |
| addParameter( |
| DefineParam(mProfileLevel, C2_PARAMKEY_PROFILE_LEVEL) |
| .withDefault(new C2StreamProfileLevelInfo::output(0u, minProfile, |
| C2Config::LEVEL_AVC_4_1)) |
| .withFields( |
| {C2F(mProfileLevel, profile).oneOf(profiles), |
| C2F(mProfileLevel, level) |
| // TODO: query supported levels from adaptor. |
| .oneOf({C2Config::LEVEL_AVC_1, C2Config::LEVEL_AVC_1B, |
| C2Config::LEVEL_AVC_1_1, C2Config::LEVEL_AVC_1_2, |
| C2Config::LEVEL_AVC_1_3, C2Config::LEVEL_AVC_2, |
| C2Config::LEVEL_AVC_2_1, C2Config::LEVEL_AVC_2_2, |
| C2Config::LEVEL_AVC_3, C2Config::LEVEL_AVC_3_1, |
| C2Config::LEVEL_AVC_3_2, C2Config::LEVEL_AVC_4, |
| C2Config::LEVEL_AVC_4_1, C2Config::LEVEL_AVC_4_2, |
| C2Config::LEVEL_AVC_5, C2Config::LEVEL_AVC_5_1})}) |
| .withSetter(H264ProfileLevelSetter, mInputVisibleSize, mFrameRate, mBitrate) |
| .build()); |
| } else if (getCodecFromComponentName(name) == VideoCodec::VP8) { |
| outputMime = MEDIA_MIMETYPE_VIDEO_VP8; |
| // VP8 doesn't have conventional profiles, we'll use profile0 if the VP8 codec is requested. |
| addParameter(DefineParam(mProfileLevel, C2_PARAMKEY_PROFILE_LEVEL) |
| .withConstValue(new C2StreamProfileLevelInfo::output( |
| 0u, C2Config::PROFILE_VP8_0, C2Config::LEVEL_UNUSED)) |
| .build()); |
| } else if (getCodecFromComponentName(name) == VideoCodec::VP9) { |
| outputMime = MEDIA_MIMETYPE_VIDEO_VP9; |
| C2Config::profile_t minProfile = static_cast<C2Config::profile_t>( |
| *std::min_element(profiles.begin(), profiles.end())); |
| addParameter( |
| DefineParam(mProfileLevel, C2_PARAMKEY_PROFILE_LEVEL) |
| .withDefault(new C2StreamProfileLevelInfo::output(0u, minProfile, |
| C2Config::LEVEL_VP9_1)) |
| .withFields( |
| {C2F(mProfileLevel, profile).oneOf(profiles), |
| C2F(mProfileLevel, level) |
| // TODO(dstaessens) query supported levels from adaptor. |
| .oneOf({C2Config::LEVEL_VP9_1, C2Config::LEVEL_VP9_1_1, |
| C2Config::LEVEL_VP9_2, C2Config::LEVEL_VP9_2_1, |
| C2Config::LEVEL_VP9_3, C2Config::LEVEL_VP9_3_1, |
| C2Config::LEVEL_VP9_4, C2Config::LEVEL_VP9_4_1, |
| C2Config::LEVEL_VP9_5, C2Config::LEVEL_VP9_5_1, |
| C2Config::LEVEL_VP9_5_2, C2Config::LEVEL_VP9_6, |
| C2Config::LEVEL_VP9_6_1, |
| C2Config::LEVEL_VP9_6_2})}) |
| .withSetter(VP9ProfileLevelSetter, mInputVisibleSize, mFrameRate, mBitrate) |
| .build()); |
| } else { |
| ALOGE("Unsupported component name: %s", name.c_str()); |
| mInitStatus = C2_BAD_VALUE; |
| return; |
| } |
| |
| addParameter( |
| DefineParam(mInputFormat, C2_PARAMKEY_INPUT_STREAM_BUFFER_TYPE) |
| .withConstValue(new C2StreamBufferTypeSetting::input(0u, C2BufferData::GRAPHIC)) |
| .build()); |
| |
| // TODO(b/167640667) Add VIDEO_ENCODER flag once input convertor is not enabled by default. |
| // When using the format convertor (which is currently always enabled) it's not useful to add |
| // the VIDEO_ENCODER buffer flag for input buffers here. Currently zero-copy is not supported |
| // yet, so when using this flag an additional buffer will be allocated on host side and a copy |
| // will be performed between the guest and host buffer to keep them in sync. This is wasteful as |
| // the buffer is only used on guest side by the format convertor which converts and copies the |
| // buffer into another buffer. |
| //addParameter(DefineParam(mInputMemoryUsage, C2_PARAMKEY_INPUT_STREAM_USAGE) |
| // .withConstValue(new C2StreamUsageTuning::input( |
| // 0u, static_cast<uint64_t>(BufferUsage::VIDEO_ENCODER))) |
| // .build()); |
| |
| addParameter( |
| DefineParam(mOutputFormat, C2_PARAMKEY_OUTPUT_STREAM_BUFFER_TYPE) |
| .withConstValue(new C2StreamBufferTypeSetting::output(0u, C2BufferData::LINEAR)) |
| .build()); |
| |
| addParameter(DefineParam(mInputMediaType, C2_PARAMKEY_INPUT_MEDIA_TYPE) |
| .withConstValue(AllocSharedString<C2PortMediaTypeSetting::input>( |
| MEDIA_MIMETYPE_VIDEO_RAW)) |
| .build()); |
| |
| addParameter(DefineParam(mOutputMediaType, C2_PARAMKEY_OUTPUT_MEDIA_TYPE) |
| .withConstValue(AllocSharedString<C2PortMediaTypeSetting::output>( |
| outputMime.c_str())) |
| .build()); |
| |
| addParameter(DefineParam(mIntraRefreshPeriod, C2_PARAMKEY_INTRA_REFRESH) |
| .withDefault(new C2StreamIntraRefreshTuning::output( |
| 0u, C2Config::INTRA_REFRESH_DISABLED, 0.)) |
| .withFields({C2F(mIntraRefreshPeriod, mode) |
| .oneOf({C2Config::INTRA_REFRESH_DISABLED, |
| C2Config::INTRA_REFRESH_ARBITRARY}), |
| C2F(mIntraRefreshPeriod, period).any()}) |
| .withSetter(IntraRefreshPeriodSetter) |
| .build()); |
| |
| addParameter(DefineParam(mRequestKeyFrame, C2_PARAMKEY_REQUEST_SYNC_FRAME) |
| .withDefault(new C2StreamRequestSyncFrameTuning::output(0u, C2_FALSE)) |
| .withFields({C2F(mRequestKeyFrame, value).oneOf({C2_FALSE, C2_TRUE})}) |
| .withSetter(Setter<decltype(*mRequestKeyFrame)>::NonStrictValueWithNoDeps) |
| .build()); |
| |
| addParameter(DefineParam(mKeyFramePeriodUs, C2_PARAMKEY_SYNC_FRAME_INTERVAL) |
| .withDefault(new C2StreamSyncFrameIntervalTuning::output(0u, 1000000)) |
| .withFields({C2F(mKeyFramePeriodUs, value).any()}) |
| .withSetter(Setter<decltype(*mKeyFramePeriodUs)>::StrictValueWithNoDeps) |
| .build()); |
| |
| C2Allocator::id_t inputAllocators[] = {kDefaultInputAllocator}; |
| |
| C2Allocator::id_t outputAllocators[] = {kDefaultOutputAllocator}; |
| |
| addParameter( |
| DefineParam(mInputAllocatorIds, C2_PARAMKEY_INPUT_ALLOCATORS) |
| .withConstValue(C2PortAllocatorsTuning::input::AllocShared(inputAllocators)) |
| .build()); |
| |
| addParameter( |
| DefineParam(mOutputAllocatorIds, C2_PARAMKEY_OUTPUT_ALLOCATORS) |
| .withConstValue(C2PortAllocatorsTuning::output::AllocShared(outputAllocators)) |
| .build()); |
| |
| C2BlockPool::local_id_t outputBlockPools[] = {kDefaultOutputBlockPool}; |
| |
| addParameter( |
| DefineParam(mOutputBlockPoolIds, C2_PARAMKEY_OUTPUT_BLOCK_POOLS) |
| .withDefault(C2PortBlockPoolsTuning::output::AllocShared(outputBlockPools)) |
| .withFields({C2F(mOutputBlockPoolIds, m.values[0]).any(), |
| C2F(mOutputBlockPoolIds, m.values).inRange(0, 1)}) |
| .withSetter(Setter<C2PortBlockPoolsTuning::output>::NonStrictValuesWithNoDeps) |
| .build()); |
| |
| mInitStatus = C2_OK; |
| } |
| |
| uint32_t V4L2EncodeInterface::getKeyFramePeriod() const { |
| if (mKeyFramePeriodUs->value < 0 || mKeyFramePeriodUs->value == INT64_MAX) { |
| return 0; |
| } |
| double period = mKeyFramePeriodUs->value / 1e6 * mFrameRate->value; |
| return static_cast<uint32_t>(std::max(std::min(std::round(period), double(UINT32_MAX)), 1.)); |
| } |
| |
| } // namespace android |
