sunshine-sdk/src/nvenc/nvenc_base.cpp
2023-10-27 16:39:40 +07:00

584 lines
22 KiB
C++

#include "nvenc_base.h"
#include "src/config.h"
#include "src/utility.h"
namespace {
GUID
quality_preset_guid_from_number(unsigned number) {
if (number > 7) number = 7;
switch (number) {
case 1:
default:
return NV_ENC_PRESET_P1_GUID;
case 2:
return NV_ENC_PRESET_P2_GUID;
case 3:
return NV_ENC_PRESET_P3_GUID;
case 4:
return NV_ENC_PRESET_P4_GUID;
case 5:
return NV_ENC_PRESET_P5_GUID;
case 6:
return NV_ENC_PRESET_P6_GUID;
case 7:
return NV_ENC_PRESET_P7_GUID;
}
};
bool
equal_guids(const GUID &guid1, const GUID &guid2) {
return std::memcmp(&guid1, &guid2, sizeof(GUID)) == 0;
}
auto
quality_preset_string_from_guid(const GUID &guid) {
if (equal_guids(guid, NV_ENC_PRESET_P1_GUID)) {
return "P1";
}
if (equal_guids(guid, NV_ENC_PRESET_P2_GUID)) {
return "P2";
}
if (equal_guids(guid, NV_ENC_PRESET_P3_GUID)) {
return "P3";
}
if (equal_guids(guid, NV_ENC_PRESET_P4_GUID)) {
return "P4";
}
if (equal_guids(guid, NV_ENC_PRESET_P5_GUID)) {
return "P5";
}
if (equal_guids(guid, NV_ENC_PRESET_P6_GUID)) {
return "P6";
}
if (equal_guids(guid, NV_ENC_PRESET_P7_GUID)) {
return "P7";
}
return "Unknown";
}
} // namespace
namespace nvenc {
nvenc_base::nvenc_base(NV_ENC_DEVICE_TYPE device_type, void *device):
device_type(device_type),
device(device) {
}
nvenc_base::~nvenc_base() {
// Use destroy_encoder() instead
}
bool
nvenc_base::create_encoder(const nvenc_config &config, const video::config_t &client_config, const nvenc_colorspace_t &colorspace, NV_ENC_BUFFER_FORMAT buffer_format) {
if (!nvenc && !init_library()) return false;
if (encoder) destroy_encoder();
auto fail_guard = util::fail_guard([this] { destroy_encoder(); });
encoder_params.width = client_config.width;
encoder_params.height = client_config.height;
encoder_params.buffer_format = buffer_format;
encoder_params.rfi = true;
NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS session_params = { NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS_VER };
session_params.device = device;
session_params.deviceType = device_type;
session_params.apiVersion = NVENCAPI_VERSION;
if (nvenc_failed(nvenc->nvEncOpenEncodeSessionEx(&session_params, &encoder))) {
// BOOST_LOG(error) << "NvEncOpenEncodeSessionEx failed";
return false;
}
uint32_t encode_guid_count = 0;
if (nvenc_failed(nvenc->nvEncGetEncodeGUIDCount(encoder, &encode_guid_count))) {
// BOOST_LOG(error) << "NvEncGetEncodeGUIDCount failed: " << last_error_string;
return false;
};
std::vector<GUID> encode_guids(encode_guid_count);
if (nvenc_failed(nvenc->nvEncGetEncodeGUIDs(encoder, encode_guids.data(), encode_guids.size(), &encode_guid_count))) {
// BOOST_LOG(error) << "NvEncGetEncodeGUIDs failed: " << last_error_string;
return false;
}
NV_ENC_INITIALIZE_PARAMS init_params = { NV_ENC_INITIALIZE_PARAMS_VER };
switch (client_config.videoFormat) {
case 0:
// H.264
init_params.encodeGUID = NV_ENC_CODEC_H264_GUID;
break;
case 1:
// HEVC
init_params.encodeGUID = NV_ENC_CODEC_HEVC_GUID;
break;
case 2:
// AV1
init_params.encodeGUID = NV_ENC_CODEC_AV1_GUID;
break;
default:
// BOOST_LOG(error) << "NvEnc: unknown video format " << client_config.videoFormat;
return false;
}
{
auto search_predicate = [&](const GUID &guid) {
return equal_guids(init_params.encodeGUID, guid);
};
if (std::find_if(encode_guids.begin(), encode_guids.end(), search_predicate) == encode_guids.end()) {
// BOOST_LOG(error) << "NvEnc: encoding format is not supported by the gpu";
return false;
}
}
auto get_encoder_cap = [&](NV_ENC_CAPS cap) {
NV_ENC_CAPS_PARAM param = { NV_ENC_CAPS_PARAM_VER, cap };
int value = 0;
nvenc->nvEncGetEncodeCaps(encoder, init_params.encodeGUID, &param, &value);
return value;
};
auto buffer_is_10bit = [&]() {
return buffer_format == NV_ENC_BUFFER_FORMAT_YUV420_10BIT || buffer_format == NV_ENC_BUFFER_FORMAT_YUV444_10BIT;
};
auto buffer_is_yuv444 = [&]() {
return buffer_format == NV_ENC_BUFFER_FORMAT_YUV444 || buffer_format == NV_ENC_BUFFER_FORMAT_YUV444_10BIT;
};
{
auto supported_width = get_encoder_cap(NV_ENC_CAPS_WIDTH_MAX);
auto supported_height = get_encoder_cap(NV_ENC_CAPS_HEIGHT_MAX);
if (encoder_params.width > supported_width || encoder_params.height > supported_height) {
// BOOST_LOG(error) << "NvEnc: gpu max encode resolution " << supported_width << "x" << supported_height << ", requested " << encoder_params.width << "x" << encoder_params.height;
return false;
}
}
if (buffer_is_10bit() && !get_encoder_cap(NV_ENC_CAPS_SUPPORT_10BIT_ENCODE)) {
// BOOST_LOG(error) << "NvEnc: gpu doesn't support 10-bit encode";
return false;
}
if (buffer_is_yuv444() && !get_encoder_cap(NV_ENC_CAPS_SUPPORT_YUV444_ENCODE)) {
// BOOST_LOG(error) << "NvEnc: gpu doesn't support YUV444 encode";
return false;
}
if (async_event_handle && !get_encoder_cap(NV_ENC_CAPS_ASYNC_ENCODE_SUPPORT)) {
// BOOST_LOG(warning) << "NvEnc: gpu doesn't support async encode";
async_event_handle = nullptr;
}
encoder_params.rfi = get_encoder_cap(NV_ENC_CAPS_SUPPORT_REF_PIC_INVALIDATION);
init_params.presetGUID = quality_preset_guid_from_number(config.quality_preset);
init_params.tuningInfo = NV_ENC_TUNING_INFO_ULTRA_LOW_LATENCY;
init_params.enablePTD = 1;
init_params.enableEncodeAsync = async_event_handle ? 1 : 0;
init_params.enableWeightedPrediction = config.weighted_prediction && get_encoder_cap(NV_ENC_CAPS_SUPPORT_WEIGHTED_PREDICTION);
init_params.encodeWidth = encoder_params.width;
init_params.darWidth = encoder_params.width;
init_params.encodeHeight = encoder_params.height;
init_params.darHeight = encoder_params.height;
init_params.frameRateNum = client_config.framerate;
init_params.frameRateDen = 1;
NV_ENC_PRESET_CONFIG preset_config = { NV_ENC_PRESET_CONFIG_VER, { NV_ENC_CONFIG_VER } };
if (nvenc_failed(nvenc->nvEncGetEncodePresetConfigEx(encoder, init_params.encodeGUID, init_params.presetGUID, init_params.tuningInfo, &preset_config))) {
// BOOST_LOG(error) << "NvEncGetEncodePresetConfigEx failed: " << last_error_string;
return false;
}
NV_ENC_CONFIG enc_config = preset_config.presetCfg;
enc_config.profileGUID = NV_ENC_CODEC_PROFILE_AUTOSELECT_GUID;
enc_config.gopLength = NVENC_INFINITE_GOPLENGTH;
enc_config.frameIntervalP = 1;
enc_config.rcParams.enableAQ = config.adaptive_quantization;
enc_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CBR;
enc_config.rcParams.zeroReorderDelay = 1;
enc_config.rcParams.enableLookahead = 0;
enc_config.rcParams.lowDelayKeyFrameScale = 1;
enc_config.rcParams.multiPass = config.two_pass == nvenc_two_pass::quarter_resolution ? NV_ENC_TWO_PASS_QUARTER_RESOLUTION :
config.two_pass == nvenc_two_pass::full_resolution ? NV_ENC_TWO_PASS_FULL_RESOLUTION :
NV_ENC_MULTI_PASS_DISABLED;
enc_config.rcParams.enableAQ = config.adaptive_quantization;
enc_config.rcParams.averageBitRate = client_config.bitrate * 1000;
if (get_encoder_cap(NV_ENC_CAPS_SUPPORT_CUSTOM_VBV_BUF_SIZE)) {
enc_config.rcParams.vbvBufferSize = client_config.bitrate * 1000 / client_config.framerate;
}
auto set_h264_hevc_common_format_config = [&](auto &format_config) {
format_config.repeatSPSPPS = 1;
format_config.idrPeriod = NVENC_INFINITE_GOPLENGTH;
format_config.sliceMode = 3;
format_config.sliceModeData = client_config.slicesPerFrame;
if (buffer_is_yuv444()) {
format_config.chromaFormatIDC = 3;
}
format_config.enableFillerDataInsertion = config.insert_filler_data;
};
auto set_ref_frames = [&](uint32_t &ref_frames_option, NV_ENC_NUM_REF_FRAMES &L0_option, uint32_t ref_frames_default) {
if (client_config.numRefFrames > 0) {
ref_frames_option = client_config.numRefFrames;
}
else {
ref_frames_option = ref_frames_default;
}
if (ref_frames_option > 0 && !get_encoder_cap(NV_ENC_CAPS_SUPPORT_MULTIPLE_REF_FRAMES)) {
ref_frames_option = 1;
encoder_params.rfi = false;
}
encoder_params.ref_frames_in_dpb = ref_frames_option;
// This limits ref frames any frame can use to 1, but allows larger buffer size for fallback if some frames are invalidated through rfi
L0_option = NV_ENC_NUM_REF_FRAMES_1;
};
auto set_minqp_if_enabled = [&](int value) {
if (config.enable_min_qp) {
enc_config.rcParams.enableMinQP = 1;
enc_config.rcParams.minQP.qpInterP = value;
enc_config.rcParams.minQP.qpIntra = value;
}
};
auto fill_h264_hevc_vui = [&colorspace](auto &vui_config) {
vui_config.videoSignalTypePresentFlag = 1;
vui_config.videoFormat = NV_ENC_VUI_VIDEO_FORMAT_UNSPECIFIED;
vui_config.videoFullRangeFlag = colorspace.full_range;
vui_config.colourDescriptionPresentFlag = 1;
vui_config.colourPrimaries = colorspace.primaries;
vui_config.transferCharacteristics = colorspace.tranfer_function;
vui_config.colourMatrix = colorspace.matrix;
vui_config.chromaSampleLocationFlag = 1;
vui_config.chromaSampleLocationTop = 0;
vui_config.chromaSampleLocationBot = 0;
};
switch (client_config.videoFormat) {
case 0: {
// H.264
enc_config.profileGUID = buffer_is_yuv444() ? NV_ENC_H264_PROFILE_HIGH_444_GUID : NV_ENC_H264_PROFILE_HIGH_GUID;
auto &format_config = enc_config.encodeCodecConfig.h264Config;
set_h264_hevc_common_format_config(format_config);
if (config.h264_cavlc || !get_encoder_cap(NV_ENC_CAPS_SUPPORT_CABAC)) {
format_config.entropyCodingMode = NV_ENC_H264_ENTROPY_CODING_MODE_CAVLC;
}
else {
format_config.entropyCodingMode = NV_ENC_H264_ENTROPY_CODING_MODE_CABAC;
}
set_ref_frames(format_config.maxNumRefFrames, format_config.numRefL0, 5);
set_minqp_if_enabled(config.min_qp_h264);
fill_h264_hevc_vui(format_config.h264VUIParameters);
break;
}
case 1: {
// HEVC
auto &format_config = enc_config.encodeCodecConfig.hevcConfig;
set_h264_hevc_common_format_config(format_config);
if (buffer_is_10bit()) {
format_config.pixelBitDepthMinus8 = 2;
}
set_ref_frames(format_config.maxNumRefFramesInDPB, format_config.numRefL0, 5);
set_minqp_if_enabled(config.min_qp_hevc);
fill_h264_hevc_vui(format_config.hevcVUIParameters);
break;
}
case 2: {
// AV1
auto &format_config = enc_config.encodeCodecConfig.av1Config;
format_config.repeatSeqHdr = 1;
format_config.idrPeriod = NVENC_INFINITE_GOPLENGTH;
format_config.chromaFormatIDC = 1; // YUV444 not supported by NVENC yet
format_config.enableBitstreamPadding = config.insert_filler_data;
if (buffer_is_10bit()) {
format_config.inputPixelBitDepthMinus8 = 2;
format_config.pixelBitDepthMinus8 = 2;
}
format_config.colorPrimaries = colorspace.primaries;
format_config.transferCharacteristics = colorspace.tranfer_function;
format_config.matrixCoefficients = colorspace.matrix;
format_config.colorRange = colorspace.full_range;
format_config.chromaSamplePosition = 1;
set_ref_frames(format_config.maxNumRefFramesInDPB, format_config.numFwdRefs, 8);
set_minqp_if_enabled(config.min_qp_av1);
if (client_config.slicesPerFrame > 1) {
// NVENC only supports slice counts that are powers of two, so we'll pick powers of two
// with bias to rows due to hopefully more similar macroblocks with a row vs a column.
format_config.numTileRows = std::pow(2, std::ceil(std::log2(client_config.slicesPerFrame) / 2));
format_config.numTileColumns = std::pow(2, std::floor(std::log2(client_config.slicesPerFrame) / 2));
}
break;
}
}
init_params.encodeConfig = &enc_config;
if (nvenc_failed(nvenc->nvEncInitializeEncoder(encoder, &init_params))) {
// BOOST_LOG(error) << "NvEncInitializeEncoder failed: " << last_error_string;
return false;
}
if (async_event_handle) {
NV_ENC_EVENT_PARAMS event_params = { NV_ENC_EVENT_PARAMS_VER };
event_params.completionEvent = async_event_handle;
if (nvenc_failed(nvenc->nvEncRegisterAsyncEvent(encoder, &event_params))) {
// BOOST_LOG(error) << "NvEncRegisterAsyncEvent failed: " << last_error_string;
return false;
}
}
NV_ENC_CREATE_BITSTREAM_BUFFER create_bitstream_buffer = { NV_ENC_CREATE_BITSTREAM_BUFFER_VER };
if (nvenc_failed(nvenc->nvEncCreateBitstreamBuffer(encoder, &create_bitstream_buffer))) {
// BOOST_LOG(error) << "NvEncCreateBitstreamBuffer failed: " << last_error_string;
return false;
}
output_bitstream = create_bitstream_buffer.bitstreamBuffer;
if (!create_and_register_input_buffer()) {
return false;
}
{
// auto f = stat_trackers::one_digit_after_decimal();
// BOOST_LOG(debug) << "NvEnc: requested encoded frame size " << f % (client_config.bitrate / 8. / client_config.framerate) << " kB";
}
{
std::string extra;
if (init_params.enableEncodeAsync) extra += " async";
if (buffer_is_10bit()) extra += " 10-bit";
if (enc_config.rcParams.multiPass != NV_ENC_MULTI_PASS_DISABLED) extra += " two-pass";
if (encoder_params.rfi) extra += " rfi";
if (init_params.enableWeightedPrediction) extra += " weighted-prediction";
if (enc_config.rcParams.enableAQ) extra += " adaptive-quantization";
if (enc_config.rcParams.enableMinQP) extra += " qpmin=" + std::to_string(enc_config.rcParams.minQP.qpInterP);
if (config.insert_filler_data) extra += " filler-data";
// BOOST_LOG(info) << "NvEnc: created encoder " << quality_preset_string_from_guid(init_params.presetGUID) << extra;
}
encoder_state = {};
fail_guard.disable();
return true;
}
void
nvenc_base::destroy_encoder() {
if (output_bitstream) {
nvenc->nvEncDestroyBitstreamBuffer(encoder, output_bitstream);
output_bitstream = nullptr;
}
if (encoder && async_event_handle) {
NV_ENC_EVENT_PARAMS event_params = { NV_ENC_EVENT_PARAMS_VER };
event_params.completionEvent = async_event_handle;
nvenc->nvEncUnregisterAsyncEvent(encoder, &event_params);
}
if (registered_input_buffer) {
nvenc->nvEncUnregisterResource(encoder, registered_input_buffer);
registered_input_buffer = nullptr;
}
if (encoder) {
nvenc->nvEncDestroyEncoder(encoder);
encoder = nullptr;
}
encoder_state = {};
encoder_params = {};
}
nvenc_encoded_frame
nvenc_base::encode_frame(uint64_t frame_index, bool force_idr) {
if (!encoder) {
return {};
}
assert(registered_input_buffer);
assert(output_bitstream);
NV_ENC_MAP_INPUT_RESOURCE mapped_input_buffer = { NV_ENC_MAP_INPUT_RESOURCE_VER };
mapped_input_buffer.registeredResource = registered_input_buffer;
if (nvenc_failed(nvenc->nvEncMapInputResource(encoder, &mapped_input_buffer))) {
// BOOST_LOG(error) << "NvEncMapInputResource failed: " << last_error_string;
return {};
}
auto unmap_guard = util::fail_guard([&] { nvenc->nvEncUnmapInputResource(encoder, &mapped_input_buffer); });
NV_ENC_PIC_PARAMS pic_params = { NV_ENC_PIC_PARAMS_VER };
pic_params.inputWidth = encoder_params.width;
pic_params.inputHeight = encoder_params.height;
pic_params.encodePicFlags = force_idr ? NV_ENC_PIC_FLAG_FORCEIDR : 0;
pic_params.inputTimeStamp = frame_index;
pic_params.pictureStruct = NV_ENC_PIC_STRUCT_FRAME;
pic_params.inputBuffer = mapped_input_buffer.mappedResource;
pic_params.bufferFmt = mapped_input_buffer.mappedBufferFmt;
pic_params.outputBitstream = output_bitstream;
pic_params.completionEvent = async_event_handle;
if (nvenc_failed(nvenc->nvEncEncodePicture(encoder, &pic_params))) {
// BOOST_LOG(error) << "NvEncEncodePicture failed: " << last_error_string;
return {};
}
NV_ENC_LOCK_BITSTREAM lock_bitstream = { NV_ENC_LOCK_BITSTREAM_VER };
lock_bitstream.outputBitstream = output_bitstream;
lock_bitstream.doNotWait = 0;
if (async_event_handle && !wait_for_async_event(100)) {
// BOOST_LOG(error) << "NvEnc: frame " << frame_index << " encode wait timeout";
return {};
}
if (nvenc_failed(nvenc->nvEncLockBitstream(encoder, &lock_bitstream))) {
// BOOST_LOG(error) << "NvEncLockBitstream failed: " << last_error_string;
return {};
}
auto data_pointer = (uint8_t *) lock_bitstream.bitstreamBufferPtr;
nvenc_encoded_frame encoded_frame {
{ data_pointer, data_pointer + lock_bitstream.bitstreamSizeInBytes },
lock_bitstream.outputTimeStamp,
lock_bitstream.pictureType == NV_ENC_PIC_TYPE_IDR,
encoder_state.rfi_needs_confirmation,
};
if (encoder_state.rfi_needs_confirmation) {
// Invalidation request has been fulfilled, and video network packet will be marked as such
encoder_state.rfi_needs_confirmation = false;
}
encoder_state.last_encoded_frame_index = frame_index;
if (encoded_frame.idr) {
// BOOST_LOG(debug) << "NvEnc: idr frame " << encoded_frame.frame_index;
}
if (nvenc_failed(nvenc->nvEncUnlockBitstream(encoder, lock_bitstream.outputBitstream))) {
// BOOST_LOG(error) << "NvEncUnlockBitstream failed: " << last_error_string;
}
// if (config::sunshine.min_log_level <= 1) {
// // Print encoded frame size stats to debug log every 20 seconds
// auto callback = [&](float stat_min, float stat_max, double stat_avg) {
// auto f = stat_trackers::one_digit_after_decimal();
// // BOOST_LOG(debug) << "NvEnc: encoded frame sizes (min max avg) " << f % stat_min << " " << f % stat_max << " " << f % stat_avg << " kB";
// };
// using namespace std::literals;
// encoder_state.frame_size_tracker.collect_and_callback_on_interval(encoded_frame.data.size() / 1000., callback, 20s);
// }
return encoded_frame;
}
bool
nvenc_base::invalidate_ref_frames(uint64_t first_frame, uint64_t last_frame) {
if (!encoder || !encoder_params.rfi) return false;
if (first_frame >= encoder_state.last_rfi_range.first &&
last_frame <= encoder_state.last_rfi_range.second) {
// BOOST_LOG(debug) << "NvEnc: rfi request " << first_frame << "-" << last_frame << " already done";
return true;
}
encoder_state.rfi_needs_confirmation = true;
if (last_frame < first_frame) {
// BOOST_LOG(error) << "NvEnc: invaid rfi request " << first_frame << "-" << last_frame << ", generating IDR";
return false;
}
// BOOST_LOG(debug) << "NvEnc: rfi request " << first_frame << "-" << last_frame << " expanding to last encoded frame " << encoder_state.last_encoded_frame_index;
last_frame = encoder_state.last_encoded_frame_index;
encoder_state.last_rfi_range = { first_frame, last_frame };
if (last_frame - first_frame + 1 >= encoder_params.ref_frames_in_dpb) {
// BOOST_LOG(debug) << "NvEnc: rfi request too large, generating IDR";
return false;
}
for (auto i = first_frame; i <= last_frame; i++) {
if (nvenc_failed(nvenc->nvEncInvalidateRefFrames(encoder, i))) {
// BOOST_LOG(error) << "NvEncInvalidateRefFrames " << i << " failed: " << last_error_string;
return false;
}
}
return true;
}
bool
nvenc_base::nvenc_failed(NVENCSTATUS status) {
auto status_string = [](NVENCSTATUS status) -> std::string {
switch (status) {
#define nvenc_status_case(x) \
case x: \
return #x;
nvenc_status_case(NV_ENC_SUCCESS);
nvenc_status_case(NV_ENC_ERR_NO_ENCODE_DEVICE);
nvenc_status_case(NV_ENC_ERR_UNSUPPORTED_DEVICE);
nvenc_status_case(NV_ENC_ERR_INVALID_ENCODERDEVICE);
nvenc_status_case(NV_ENC_ERR_INVALID_DEVICE);
nvenc_status_case(NV_ENC_ERR_DEVICE_NOT_EXIST);
nvenc_status_case(NV_ENC_ERR_INVALID_PTR);
nvenc_status_case(NV_ENC_ERR_INVALID_EVENT);
nvenc_status_case(NV_ENC_ERR_INVALID_PARAM);
nvenc_status_case(NV_ENC_ERR_INVALID_CALL);
nvenc_status_case(NV_ENC_ERR_OUT_OF_MEMORY);
nvenc_status_case(NV_ENC_ERR_ENCODER_NOT_INITIALIZED);
nvenc_status_case(NV_ENC_ERR_UNSUPPORTED_PARAM);
nvenc_status_case(NV_ENC_ERR_LOCK_BUSY);
nvenc_status_case(NV_ENC_ERR_NOT_ENOUGH_BUFFER);
nvenc_status_case(NV_ENC_ERR_INVALID_VERSION);
nvenc_status_case(NV_ENC_ERR_MAP_FAILED);
nvenc_status_case(NV_ENC_ERR_NEED_MORE_INPUT);
nvenc_status_case(NV_ENC_ERR_ENCODER_BUSY);
nvenc_status_case(NV_ENC_ERR_EVENT_NOT_REGISTERD);
nvenc_status_case(NV_ENC_ERR_GENERIC);
nvenc_status_case(NV_ENC_ERR_INCOMPATIBLE_CLIENT_KEY);
nvenc_status_case(NV_ENC_ERR_UNIMPLEMENTED);
nvenc_status_case(NV_ENC_ERR_RESOURCE_REGISTER_FAILED);
nvenc_status_case(NV_ENC_ERR_RESOURCE_NOT_REGISTERED);
nvenc_status_case(NV_ENC_ERR_RESOURCE_NOT_MAPPED);
// Newer versions of sdk may add more constants, look for them the end of NVENCSTATUS enum
#undef nvenc_status_case
default:
return std::to_string(status);
}
};
last_error_string.clear();
if (status != NV_ENC_SUCCESS) {
if (nvenc && encoder) {
last_error_string = nvenc->nvEncGetLastErrorString(encoder);
if (!last_error_string.empty()) last_error_string += " ";
}
last_error_string += status_string(status);
return true;
}
return false;
}
} // namespace nvenc