/*
  * H.264 hardware encoding using nvidia nvenc
  * Copyright (c) 2014 Timo Rothenpieler <timo@rothenpieler.org>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #if defined(_WIN32)

 #include <windows.h>
 #else
 #include <dlfcn.h>
 #endif
 
 #include <nvEncodeAPI.h>
 
 #include "libavutil/internal.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/avassert.h"
 #include "libavutil/opt.h"
 #include "libavutil/mem.h"
 #include "avcodec.h"
 #include "internal.h"
 #include "thread.h"
 

 #if defined(_WIN32)

 #define CUDAAPI __stdcall
 #else
 #define CUDAAPI
 #endif
 

 #if defined(_WIN32)

 #define LOAD_FUNC(l, s) GetProcAddress(l, s)
 #define DL_CLOSE_FUNC(l) FreeLibrary(l)
 #else
 #define LOAD_FUNC(l, s) dlsym(l, s)
 #define DL_CLOSE_FUNC(l) dlclose(l)
 #endif
 
 typedef enum cudaError_enum {
     CUDA_SUCCESS = 0
 } CUresult;
 typedef int CUdevice;
 typedef void* CUcontext;
 
 typedef CUresult(CUDAAPI *PCUINIT)(unsigned int Flags);
 typedef CUresult(CUDAAPI *PCUDEVICEGETCOUNT)(int *count);
 typedef CUresult(CUDAAPI *PCUDEVICEGET)(CUdevice *device, int ordinal);
 typedef CUresult(CUDAAPI *PCUDEVICEGETNAME)(char *name, int len, CUdevice dev);
 typedef CUresult(CUDAAPI *PCUDEVICECOMPUTECAPABILITY)(int *major, int *minor, CUdevice dev);
 typedef CUresult(CUDAAPI *PCUCTXCREATE)(CUcontext *pctx, unsigned int flags, CUdevice dev);
 typedef CUresult(CUDAAPI *PCUCTXPOPCURRENT)(CUcontext *pctx);
 typedef CUresult(CUDAAPI *PCUCTXDESTROY)(CUcontext ctx);
 
 typedef NVENCSTATUS (NVENCAPI* PNVENCODEAPICREATEINSTANCE)(NV_ENCODE_API_FUNCTION_LIST *functionList);
 
 typedef struct NvencInputSurface
 {
     NV_ENC_INPUT_PTR input_surface;
     int width;
     int height;
 
     int lockCount;
 
     NV_ENC_BUFFER_FORMAT format;
 } NvencInputSurface;
 
 typedef struct NvencOutputSurface
 {
     NV_ENC_OUTPUT_PTR output_surface;
     int size;
 
     NvencInputSurface* input_surface;
 
     int busy;
 } NvencOutputSurface;
 
 typedef struct NvencData
 {
     union {
         int64_t timestamp;
         NvencOutputSurface *surface;

     } u;

 } NvencData;
 
 typedef struct NvencDataList
 {
     NvencData* data;
 
     uint32_t pos;
     uint32_t count;
     uint32_t size;
 } NvencDataList;
 
 typedef struct NvencDynLoadFunctions
 {
     PCUINIT cu_init;
     PCUDEVICEGETCOUNT cu_device_get_count;
     PCUDEVICEGET cu_device_get;
     PCUDEVICEGETNAME cu_device_get_name;
     PCUDEVICECOMPUTECAPABILITY cu_device_compute_capability;
     PCUCTXCREATE cu_ctx_create;
     PCUCTXPOPCURRENT cu_ctx_pop_current;
     PCUCTXDESTROY cu_ctx_destroy;
 
     NV_ENCODE_API_FUNCTION_LIST nvenc_funcs;
     int nvenc_device_count;
     CUdevice nvenc_devices[16];
 

 #if defined(_WIN32)

     HMODULE cuda_lib;
     HMODULE nvenc_lib;
 #else
     void* cuda_lib;
     void* nvenc_lib;
 #endif
 } NvencDynLoadFunctions;
 

 typedef struct NvencValuePair
 {
     const char *str;
     uint32_t num;
 } NvencValuePair;
 

 typedef struct NvencContext
 {
     AVClass *avclass;
 
     NvencDynLoadFunctions nvenc_dload_funcs;
 
     NV_ENC_INITIALIZE_PARAMS init_encode_params;
     NV_ENC_CONFIG encode_config;
     CUcontext cu_context;
 
     int max_surface_count;
     NvencInputSurface *input_surfaces;
     NvencOutputSurface *output_surfaces;
 
     NvencDataList output_surface_queue;
     NvencDataList output_surface_ready_queue;
     NvencDataList timestamp_list;
     int64_t last_dts;
 
     void *nvencoder;
 
     char *preset;

     char *profile;

     char *level;
     char *tier;

     int cbr;
     int twopass;
     int gpu;

     int buffer_delay;

 } NvencContext;
 

 static const NvencValuePair nvenc_h264_level_pairs[] = {
     { "auto", NV_ENC_LEVEL_AUTOSELECT },
     { "1"   , NV_ENC_LEVEL_H264_1     },
     { "1.0" , NV_ENC_LEVEL_H264_1     },
     { "1b"  , NV_ENC_LEVEL_H264_1b    },
     { "1.0b", NV_ENC_LEVEL_H264_1b    },
     { "1.1" , NV_ENC_LEVEL_H264_11    },
     { "1.2" , NV_ENC_LEVEL_H264_12    },
     { "1.3" , NV_ENC_LEVEL_H264_13    },
     { "2"   , NV_ENC_LEVEL_H264_2     },
     { "2.0" , NV_ENC_LEVEL_H264_2     },
     { "2.1" , NV_ENC_LEVEL_H264_21    },
     { "2.2" , NV_ENC_LEVEL_H264_22    },
     { "3"   , NV_ENC_LEVEL_H264_3     },
     { "3.0" , NV_ENC_LEVEL_H264_3     },
     { "3.1" , NV_ENC_LEVEL_H264_31    },
     { "3.2" , NV_ENC_LEVEL_H264_32    },
     { "4"   , NV_ENC_LEVEL_H264_4     },
     { "4.0" , NV_ENC_LEVEL_H264_4     },
     { "4.1" , NV_ENC_LEVEL_H264_41    },
     { "4.2" , NV_ENC_LEVEL_H264_42    },
     { "5"   , NV_ENC_LEVEL_H264_5     },
     { "5.0" , NV_ENC_LEVEL_H264_5     },
     { "5.1" , NV_ENC_LEVEL_H264_51    },
     { NULL }
 };
 

 static const NvencValuePair nvenc_hevc_level_pairs[] = {

     { "auto", NV_ENC_LEVEL_AUTOSELECT },
     { "1"   , NV_ENC_LEVEL_HEVC_1     },
     { "1.0" , NV_ENC_LEVEL_HEVC_1     },
     { "2"   , NV_ENC_LEVEL_HEVC_2     },
     { "2.0" , NV_ENC_LEVEL_HEVC_2     },
     { "2.1" , NV_ENC_LEVEL_HEVC_21    },
     { "3"   , NV_ENC_LEVEL_HEVC_3     },
     { "3.0" , NV_ENC_LEVEL_HEVC_3     },
     { "3.1" , NV_ENC_LEVEL_HEVC_31    },
     { "4"   , NV_ENC_LEVEL_HEVC_4     },
     { "4.0" , NV_ENC_LEVEL_HEVC_4     },
     { "4.1" , NV_ENC_LEVEL_HEVC_41    },
     { "5"   , NV_ENC_LEVEL_HEVC_5     },
     { "5.0" , NV_ENC_LEVEL_HEVC_5     },
     { "5.1" , NV_ENC_LEVEL_HEVC_51    },
     { "5.2" , NV_ENC_LEVEL_HEVC_52    },
     { "6"   , NV_ENC_LEVEL_HEVC_6     },
     { "6.0" , NV_ENC_LEVEL_HEVC_6     },
     { "6.1" , NV_ENC_LEVEL_HEVC_61    },
     { "6.2" , NV_ENC_LEVEL_HEVC_62    },
     { NULL }
 };
 
 static int input_string_to_uint32(AVCodecContext *avctx, const NvencValuePair *pair, const char *input, uint32_t *output)
 {
     for (; pair->str; ++pair) {
         if (!strcmp(input, pair->str)) {
             *output = pair->num;
             return 0;
         }
     }
 
     return AVERROR(EINVAL);
 }
 

 static NvencData* data_queue_dequeue(NvencDataList* queue)
 {
     uint32_t mask;
     uint32_t read_pos;
 
     av_assert0(queue);
     av_assert0(queue->size);
     av_assert0(queue->data);
 
     if (!queue->count)
         return NULL;
 
     /* Size always is a multiple of two */
     mask = queue->size - 1;
     read_pos = (queue->pos - queue->count) & mask;
     queue->count--;
 
     return &queue->data[read_pos];
 }
 
 static int data_queue_enqueue(NvencDataList* queue, NvencData *data)
 {
     NvencDataList new_queue;
     NvencData* tmp_data;
     uint32_t mask;
 
     if (!queue->size) {
         /* size always has to be a multiple of two */
         queue->size = 4;
         queue->pos = 0;
         queue->count = 0;
 
         queue->data = av_malloc(queue->size * sizeof(*(queue->data)));
 
         if (!queue->data) {
             queue->size = 0;
             return AVERROR(ENOMEM);
         }
     }
 
     if (queue->count == queue->size) {
         new_queue.size = queue->size << 1;
         new_queue.pos = 0;
         new_queue.count = 0;
         new_queue.data = av_malloc(new_queue.size * sizeof(*(queue->data)));
 
         if (!new_queue.data)
             return AVERROR(ENOMEM);
 
         while (tmp_data = data_queue_dequeue(queue))
             data_queue_enqueue(&new_queue, tmp_data);
 
         av_free(queue->data);
         *queue = new_queue;
     }
 
     mask = queue->size - 1;
 
     queue->data[queue->pos] = *data;
     queue->pos = (queue->pos + 1) & mask;
     queue->count++;
 
     return 0;
 }
 
 static int out_surf_queue_enqueue(NvencDataList* queue, NvencOutputSurface* surface)
 {
     NvencData data;

     data.u.surface = surface;

 
     return data_queue_enqueue(queue, &data);
 }
 
 static NvencOutputSurface* out_surf_queue_dequeue(NvencDataList* queue)
 {
     NvencData* res = data_queue_dequeue(queue);
 
     if (!res)
         return NULL;
 

     return res->u.surface;

 }
 
 static int timestamp_queue_enqueue(NvencDataList* queue, int64_t timestamp)
 {
     NvencData data;

     data.u.timestamp = timestamp;

 
     return data_queue_enqueue(queue, &data);
 }
 
 static int64_t timestamp_queue_dequeue(NvencDataList* queue)
 {
     NvencData* res = data_queue_dequeue(queue);
 
     if (!res)
         return AV_NOPTS_VALUE;
 

     return res->u.timestamp;

 }
 
 #define CHECK_LOAD_FUNC(t, f, s) \
 do { \
     (f) = (t)LOAD_FUNC(dl_fn->cuda_lib, s); \
     if (!(f)) { \
         av_log(avctx, AV_LOG_FATAL, "Failed loading %s from CUDA library\n", s); \
         goto error; \
     } \
 } while (0)
 
 static av_cold int nvenc_dyload_cuda(AVCodecContext *avctx)
 {
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
 
     if (dl_fn->cuda_lib)
         return 1;
 
 #if defined(_WIN32)
     dl_fn->cuda_lib = LoadLibrary(TEXT("nvcuda.dll"));
 #else
     dl_fn->cuda_lib = dlopen("libcuda.so", RTLD_LAZY);
 #endif
 
     if (!dl_fn->cuda_lib) {
         av_log(avctx, AV_LOG_FATAL, "Failed loading CUDA library\n");
         goto error;
     }
 
     CHECK_LOAD_FUNC(PCUINIT, dl_fn->cu_init, "cuInit");
     CHECK_LOAD_FUNC(PCUDEVICEGETCOUNT, dl_fn->cu_device_get_count, "cuDeviceGetCount");
     CHECK_LOAD_FUNC(PCUDEVICEGET, dl_fn->cu_device_get, "cuDeviceGet");
     CHECK_LOAD_FUNC(PCUDEVICEGETNAME, dl_fn->cu_device_get_name, "cuDeviceGetName");
     CHECK_LOAD_FUNC(PCUDEVICECOMPUTECAPABILITY, dl_fn->cu_device_compute_capability, "cuDeviceComputeCapability");
     CHECK_LOAD_FUNC(PCUCTXCREATE, dl_fn->cu_ctx_create, "cuCtxCreate_v2");
     CHECK_LOAD_FUNC(PCUCTXPOPCURRENT, dl_fn->cu_ctx_pop_current, "cuCtxPopCurrent_v2");
     CHECK_LOAD_FUNC(PCUCTXDESTROY, dl_fn->cu_ctx_destroy, "cuCtxDestroy_v2");
 
     return 1;
 
 error:
 
     if (dl_fn->cuda_lib)
         DL_CLOSE_FUNC(dl_fn->cuda_lib);
 
     dl_fn->cuda_lib = NULL;
 
     return 0;
 }
 
 static av_cold int check_cuda_errors(AVCodecContext *avctx, CUresult err, const char *func)
 {
     if (err != CUDA_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, ">> %s - failed with error code 0x%x\n", func, err);
         return 0;
     }
     return 1;
 }
 #define check_cuda_errors(f) if (!check_cuda_errors(avctx, f, #f)) goto error
 
 static av_cold int nvenc_check_cuda(AVCodecContext *avctx)
 {
     int device_count = 0;
     CUdevice cu_device = 0;
     char gpu_name[128];
     int smminor = 0, smmajor = 0;

     int i, smver, target_smver;

 
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
 

     switch (avctx->codec->id) {
     case AV_CODEC_ID_H264:

         target_smver = avctx->pix_fmt == AV_PIX_FMT_YUV444P ? 0x52 : 0x30;

         break;
     case AV_CODEC_ID_H265:
         target_smver = 0x52;
         break;
     default:
         av_log(avctx, AV_LOG_FATAL, "nvenc: Unknown codec name\n");
         goto error;
     }
 

     if (!nvenc_dyload_cuda(avctx))
         return 0;
 
     if (dl_fn->nvenc_device_count > 0)
         return 1;
 
     check_cuda_errors(dl_fn->cu_init(0));
 
     check_cuda_errors(dl_fn->cu_device_get_count(&device_count));
 
     if (!device_count) {
         av_log(avctx, AV_LOG_FATAL, "No CUDA capable devices found\n");
         goto error;
     }
 
     av_log(avctx, AV_LOG_VERBOSE, "%d CUDA capable devices found\n", device_count);
 
     dl_fn->nvenc_device_count = 0;
 
     for (i = 0; i < device_count; ++i) {
         check_cuda_errors(dl_fn->cu_device_get(&cu_device, i));
         check_cuda_errors(dl_fn->cu_device_get_name(gpu_name, sizeof(gpu_name), cu_device));
         check_cuda_errors(dl_fn->cu_device_compute_capability(&smmajor, &smminor, cu_device));
 
         smver = (smmajor << 4) | smminor;
 

         av_log(avctx, AV_LOG_VERBOSE, "[ GPU #%d - < %s > has Compute SM %d.%d, NVENC %s ]\n", i, gpu_name, smmajor, smminor, (smver >= target_smver) ? "Available" : "Not Available");

         if (smver >= target_smver)

             dl_fn->nvenc_devices[dl_fn->nvenc_device_count++] = cu_device;
     }
 
     if (!dl_fn->nvenc_device_count) {
         av_log(avctx, AV_LOG_FATAL, "No NVENC capable devices found\n");
         goto error;
     }
 
     return 1;
 
 error:
 
     dl_fn->nvenc_device_count = 0;
 
     return 0;
 }
 
 static av_cold int nvenc_dyload_nvenc(AVCodecContext *avctx)
 {
     PNVENCODEAPICREATEINSTANCE nvEncodeAPICreateInstance = 0;
     NVENCSTATUS nvstatus;
 
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
 
     if (!nvenc_check_cuda(avctx))
         return 0;
 
     if (dl_fn->nvenc_lib)
         return 1;
 
 #if defined(_WIN32)
     if (sizeof(void*) == 8) {
         dl_fn->nvenc_lib = LoadLibrary(TEXT("nvEncodeAPI64.dll"));
     } else {
         dl_fn->nvenc_lib = LoadLibrary(TEXT("nvEncodeAPI.dll"));
     }
 #else
     dl_fn->nvenc_lib = dlopen("libnvidia-encode.so.1", RTLD_LAZY);
 #endif
 
     if (!dl_fn->nvenc_lib) {
         av_log(avctx, AV_LOG_FATAL, "Failed loading the nvenc library\n");
         goto error;
     }
 
     nvEncodeAPICreateInstance = (PNVENCODEAPICREATEINSTANCE)LOAD_FUNC(dl_fn->nvenc_lib, "NvEncodeAPICreateInstance");
 
     if (!nvEncodeAPICreateInstance) {
         av_log(avctx, AV_LOG_FATAL, "Failed to load nvenc entrypoint\n");
         goto error;
     }
 
     dl_fn->nvenc_funcs.version = NV_ENCODE_API_FUNCTION_LIST_VER;
 
     nvstatus = nvEncodeAPICreateInstance(&dl_fn->nvenc_funcs);
 
     if (nvstatus != NV_ENC_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, "Failed to create nvenc instance\n");
         goto error;
     }
 
     av_log(avctx, AV_LOG_VERBOSE, "Nvenc initialized successfully\n");
 
     return 1;
 
 error:
     if (dl_fn->nvenc_lib)
         DL_CLOSE_FUNC(dl_fn->nvenc_lib);
 
     dl_fn->nvenc_lib = NULL;
 
     return 0;
 }
 
 static av_cold void nvenc_unload_nvenc(AVCodecContext *avctx)
 {
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
 
     DL_CLOSE_FUNC(dl_fn->nvenc_lib);
     dl_fn->nvenc_lib = NULL;
 
     dl_fn->nvenc_device_count = 0;
 
     DL_CLOSE_FUNC(dl_fn->cuda_lib);
     dl_fn->cuda_lib = NULL;
 
     dl_fn->cu_init = NULL;
     dl_fn->cu_device_get_count = NULL;
     dl_fn->cu_device_get = NULL;
     dl_fn->cu_device_get_name = NULL;
     dl_fn->cu_device_compute_capability = NULL;
     dl_fn->cu_ctx_create = NULL;
     dl_fn->cu_ctx_pop_current = NULL;
     dl_fn->cu_ctx_destroy = NULL;
 
     av_log(avctx, AV_LOG_VERBOSE, "Nvenc unloaded\n");
 }
 
 static av_cold int nvenc_encode_init(AVCodecContext *avctx)
 {
     NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS encode_session_params = { 0 };
     NV_ENC_PRESET_CONFIG preset_config = { 0 };
     CUcontext cu_context_curr;
     CUresult cu_res;
     GUID encoder_preset = NV_ENC_PRESET_HQ_GUID;

     GUID codec;

     NVENCSTATUS nv_status = NV_ENC_SUCCESS;
     int surfaceCount = 0;
     int i, num_mbs;
     int isLL = 0;

     int lossless = 0;

     int res = 0;

     int dw, dh;

 
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
     NV_ENCODE_API_FUNCTION_LIST *p_nvenc = &dl_fn->nvenc_funcs;
 
     if (!nvenc_dyload_nvenc(avctx))
         return AVERROR_EXTERNAL;
 
     ctx->last_dts = AV_NOPTS_VALUE;
 
     ctx->encode_config.version = NV_ENC_CONFIG_VER;
     ctx->init_encode_params.version = NV_ENC_INITIALIZE_PARAMS_VER;
     preset_config.version = NV_ENC_PRESET_CONFIG_VER;
     preset_config.presetCfg.version = NV_ENC_CONFIG_VER;
     encode_session_params.version = NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS_VER;
     encode_session_params.apiVersion = NVENCAPI_VERSION;

     if (ctx->gpu >= dl_fn->nvenc_device_count) {
         av_log(avctx, AV_LOG_FATAL, "Requested GPU %d, but only %d GPUs are available!\n", ctx->gpu, dl_fn->nvenc_device_count);
         res = AVERROR(EINVAL);
         goto error;
     }
 
     ctx->cu_context = NULL;
     cu_res = dl_fn->cu_ctx_create(&ctx->cu_context, 0, dl_fn->nvenc_devices[ctx->gpu]);
 
     if (cu_res != CUDA_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, "Failed creating CUDA context for NVENC: 0x%x\n", (int)cu_res);
         res = AVERROR_EXTERNAL;
         goto error;
     }
 
     cu_res = dl_fn->cu_ctx_pop_current(&cu_context_curr);
 
     if (cu_res != CUDA_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, "Failed popping CUDA context: 0x%x\n", (int)cu_res);
         res = AVERROR_EXTERNAL;
         goto error;
     }
 
     encode_session_params.device = ctx->cu_context;
     encode_session_params.deviceType = NV_ENC_DEVICE_TYPE_CUDA;
 
     nv_status = p_nvenc->nvEncOpenEncodeSessionEx(&encode_session_params, &ctx->nvencoder);
     if (nv_status != NV_ENC_SUCCESS) {
         ctx->nvencoder = NULL;
         av_log(avctx, AV_LOG_FATAL, "OpenEncodeSessionEx failed: 0x%x - invalid license key?\n", (int)nv_status);
         res = AVERROR_EXTERNAL;
         goto error;
     }
 
     if (ctx->preset) {
         if (!strcmp(ctx->preset, "hp")) {
             encoder_preset = NV_ENC_PRESET_HP_GUID;
         } else if (!strcmp(ctx->preset, "hq")) {
             encoder_preset = NV_ENC_PRESET_HQ_GUID;
         } else if (!strcmp(ctx->preset, "bd")) {
             encoder_preset = NV_ENC_PRESET_BD_GUID;
         } else if (!strcmp(ctx->preset, "ll")) {
             encoder_preset = NV_ENC_PRESET_LOW_LATENCY_DEFAULT_GUID;
             isLL = 1;
         } else if (!strcmp(ctx->preset, "llhp")) {
             encoder_preset = NV_ENC_PRESET_LOW_LATENCY_HP_GUID;
             isLL = 1;
         } else if (!strcmp(ctx->preset, "llhq")) {
             encoder_preset = NV_ENC_PRESET_LOW_LATENCY_HQ_GUID;
             isLL = 1;

         } else if (!strcmp(ctx->preset, "lossless")) {
             encoder_preset = NV_ENC_PRESET_LOSSLESS_DEFAULT_GUID;
             lossless = 1;
         } else if (!strcmp(ctx->preset, "losslesshp")) {
             encoder_preset = NV_ENC_PRESET_LOSSLESS_HP_GUID;
             lossless = 1;

         } else if (!strcmp(ctx->preset, "default")) {
             encoder_preset = NV_ENC_PRESET_DEFAULT_GUID;
         } else {

             av_log(avctx, AV_LOG_FATAL, "Preset \"%s\" is unknown! Supported presets: hp, hq, bd, ll, llhp, llhq, lossless, losslesshp, default\n", ctx->preset);

             res = AVERROR(EINVAL);
             goto error;
         }
     }
 

     switch (avctx->codec->id) {
     case AV_CODEC_ID_H264:
         codec = NV_ENC_CODEC_H264_GUID;
         break;
     case AV_CODEC_ID_H265:
         codec = NV_ENC_CODEC_HEVC_GUID;
         break;
     default:
         av_log(avctx, AV_LOG_ERROR, "nvenc: Unknown codec name\n");
         res = AVERROR(EINVAL);
         goto error;
     }
 
     nv_status = p_nvenc->nvEncGetEncodePresetConfig(ctx->nvencoder, codec, encoder_preset, &preset_config);

     if (nv_status != NV_ENC_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, "GetEncodePresetConfig failed: 0x%x\n", (int)nv_status);
         res = AVERROR_EXTERNAL;
         goto error;
     }
 

     ctx->init_encode_params.encodeGUID = codec;

     ctx->init_encode_params.encodeHeight = avctx->height;
     ctx->init_encode_params.encodeWidth = avctx->width;

 
     if (avctx->sample_aspect_ratio.num && avctx->sample_aspect_ratio.den &&
         (avctx->sample_aspect_ratio.num != 1 || avctx->sample_aspect_ratio.num != 1)) {
         av_reduce(&dw, &dh,
                   avctx->width * avctx->sample_aspect_ratio.num,
                   avctx->height * avctx->sample_aspect_ratio.den,
                   1024 * 1024);
         ctx->init_encode_params.darHeight = dh;
         ctx->init_encode_params.darWidth = dw;
     } else {
         ctx->init_encode_params.darHeight = avctx->height;
         ctx->init_encode_params.darWidth = avctx->width;
     }
 

     // De-compensate for hardware, dubiously, trying to compensate for
     // playback at 704 pixel width.
     if (avctx->width == 720 &&
         (avctx->height == 480 || avctx->height == 576)) {
         av_reduce(&dw, &dh,
                   ctx->init_encode_params.darWidth * 44,
                   ctx->init_encode_params.darHeight * 45,

                   1024 * 1024);

         ctx->init_encode_params.darHeight = dh;
         ctx->init_encode_params.darWidth = dw;
     }
 

     ctx->init_encode_params.frameRateNum = avctx->time_base.den;
     ctx->init_encode_params.frameRateDen = avctx->time_base.num * avctx->ticks_per_frame;
 
     num_mbs = ((avctx->width + 15) >> 4) * ((avctx->height + 15) >> 4);
     ctx->max_surface_count = (num_mbs >= 8160) ? 32 : 48;
 

     if (ctx->buffer_delay >= ctx->max_surface_count)
         ctx->buffer_delay = ctx->max_surface_count - 1;
 

     ctx->init_encode_params.enableEncodeAsync = 0;
     ctx->init_encode_params.enablePTD = 1;
 
     ctx->init_encode_params.presetGUID = encoder_preset;
 
     ctx->init_encode_params.encodeConfig = &ctx->encode_config;
     memcpy(&ctx->encode_config, &preset_config.presetCfg, sizeof(ctx->encode_config));
     ctx->encode_config.version = NV_ENC_CONFIG_VER;
 

     if (avctx->refs >= 0) {
         /* 0 means "let the hardware decide" */

         switch (avctx->codec->id) {
         case AV_CODEC_ID_H264:
             ctx->encode_config.encodeCodecConfig.h264Config.maxNumRefFrames = avctx->refs;
             break;
         case AV_CODEC_ID_H265:
             ctx->encode_config.encodeCodecConfig.hevcConfig.maxNumRefFramesInDPB = avctx->refs;
             break;
         /* Earlier switch/case will return if unknown codec is passed. */
         }

     }
 

     if (avctx->gop_size > 0) {
         if (avctx->max_b_frames >= 0) {
             /* 0 is intra-only, 1 is I/P only, 2 is one B Frame, 3 two B frames, and so on. */
             ctx->encode_config.frameIntervalP = avctx->max_b_frames + 1;
         }
 

         ctx->encode_config.gopLength = avctx->gop_size;

         switch (avctx->codec->id) {
         case AV_CODEC_ID_H264:
             ctx->encode_config.encodeCodecConfig.h264Config.idrPeriod = avctx->gop_size;
             break;
         case AV_CODEC_ID_H265:
             ctx->encode_config.encodeCodecConfig.hevcConfig.idrPeriod = avctx->gop_size;
             break;
         /* Earlier switch/case will return if unknown codec is passed. */
         }

     } else if (avctx->gop_size == 0) {
         ctx->encode_config.frameIntervalP = 0;
         ctx->encode_config.gopLength = 1;

         switch (avctx->codec->id) {
         case AV_CODEC_ID_H264:
             ctx->encode_config.encodeCodecConfig.h264Config.idrPeriod = 1;
             break;
         case AV_CODEC_ID_H265:
             ctx->encode_config.encodeCodecConfig.hevcConfig.idrPeriod = 1;
             break;
         /* Earlier switch/case will return if unknown codec is passed. */
         }

     }
 

     /* when there're b frames, set dts offset */
     if (ctx->encode_config.frameIntervalP >= 2)
         ctx->last_dts = -2;
 

     if (avctx->bit_rate > 0)
         ctx->encode_config.rcParams.averageBitRate = avctx->bit_rate;
 
     if (avctx->rc_max_rate > 0)
         ctx->encode_config.rcParams.maxBitRate = avctx->rc_max_rate;
 

     if (lossless) {

         if (avctx->codec->id == AV_CODEC_ID_H264)
             ctx->encode_config.encodeCodecConfig.h264Config.qpPrimeYZeroTransformBypassFlag = 1;
 

         ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CONSTQP;
         ctx->encode_config.rcParams.constQP.qpInterB = 0;
         ctx->encode_config.rcParams.constQP.qpInterP = 0;
         ctx->encode_config.rcParams.constQP.qpIntra = 0;
 
         avctx->qmin = -1;
         avctx->qmax = -1;

     } else if (ctx->cbr) {

         if (!ctx->twopass) {
             ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CBR;
         } else if (ctx->twopass == 1 || isLL) {
             ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_2_PASS_QUALITY;
 

             if (avctx->codec->id == AV_CODEC_ID_H264) {
                 ctx->encode_config.encodeCodecConfig.h264Config.adaptiveTransformMode = NV_ENC_H264_ADAPTIVE_TRANSFORM_ENABLE;
                 ctx->encode_config.encodeCodecConfig.h264Config.fmoMode = NV_ENC_H264_FMO_DISABLE;
             }

         } else {
             ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CBR;
         }
     } else if (avctx->global_quality > 0) {
         ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_CONSTQP;
         ctx->encode_config.rcParams.constQP.qpInterB = avctx->global_quality;
         ctx->encode_config.rcParams.constQP.qpInterP = avctx->global_quality;
         ctx->encode_config.rcParams.constQP.qpIntra = avctx->global_quality;
 
         avctx->qmin = -1;
         avctx->qmax = -1;
     } else if (avctx->qmin >= 0 && avctx->qmax >= 0) {

         if (ctx->twopass == 1) {
             ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_2_PASS_VBR;
 
             if (avctx->codec->id == AV_CODEC_ID_H264) {
                 ctx->encode_config.encodeCodecConfig.h264Config.adaptiveTransformMode = NV_ENC_H264_ADAPTIVE_TRANSFORM_ENABLE;
                 ctx->encode_config.encodeCodecConfig.h264Config.fmoMode = NV_ENC_H264_FMO_DISABLE;
             }
         } else {
             ctx->encode_config.rcParams.rateControlMode = NV_ENC_PARAMS_RC_VBR;
         }

 
         ctx->encode_config.rcParams.enableMinQP = 1;
         ctx->encode_config.rcParams.enableMaxQP = 1;
 
         ctx->encode_config.rcParams.minQP.qpInterB = avctx->qmin;
         ctx->encode_config.rcParams.minQP.qpInterP = avctx->qmin;
         ctx->encode_config.rcParams.minQP.qpIntra = avctx->qmin;
 
         ctx->encode_config.rcParams.maxQP.qpInterB = avctx->qmax;
         ctx->encode_config.rcParams.maxQP.qpInterP = avctx->qmax;
         ctx->encode_config.rcParams.maxQP.qpIntra = avctx->qmax;
     }
 
     if (avctx->rc_buffer_size > 0)
         ctx->encode_config.rcParams.vbvBufferSize = avctx->rc_buffer_size;
 

     if (avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {

         ctx->encode_config.frameFieldMode = NV_ENC_PARAMS_FRAME_FIELD_MODE_FIELD;
     } else {
         ctx->encode_config.frameFieldMode = NV_ENC_PARAMS_FRAME_FIELD_MODE_FRAME;
     }
 

     switch (avctx->codec->id) {
     case AV_CODEC_ID_H264:
         ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.colourDescriptionPresentFlag = 1;
         ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.videoSignalTypePresentFlag = 1;

         ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.colourMatrix = avctx->colorspace;
         ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.colourPrimaries = avctx->color_primaries;
         ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.transferCharacteristics = avctx->color_trc;

         ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.videoFullRangeFlag = avctx->color_range == AVCOL_RANGE_JPEG;

         ctx->encode_config.encodeCodecConfig.h264Config.disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
         ctx->encode_config.encodeCodecConfig.h264Config.repeatSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;

 
         if (!ctx->profile) {
             switch (avctx->profile) {

             case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_HIGH_444_GUID;
                 break;

             case FF_PROFILE_H264_BASELINE:
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_BASELINE_GUID;
                 break;
             case FF_PROFILE_H264_MAIN:
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_MAIN_GUID;
                 break;
             case FF_PROFILE_H264_HIGH:
             case FF_PROFILE_UNKNOWN:
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_HIGH_GUID;
                 break;
             default:
                 av_log(avctx, AV_LOG_WARNING, "Unsupported profile requested, falling back to high\n");
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_HIGH_GUID;
                 break;
             }
         } else {
             if (!strcmp(ctx->profile, "high")) {
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_HIGH_GUID;
                 avctx->profile = FF_PROFILE_H264_HIGH;
             } else if (!strcmp(ctx->profile, "main")) {
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_MAIN_GUID;
                 avctx->profile = FF_PROFILE_H264_MAIN;
             } else if (!strcmp(ctx->profile, "baseline")) {
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_BASELINE_GUID;
                 avctx->profile = FF_PROFILE_H264_BASELINE;

             } else if (!strcmp(ctx->profile, "high444p")) {
                 ctx->encode_config.profileGUID = NV_ENC_H264_PROFILE_HIGH_444_GUID;
                 avctx->profile = FF_PROFILE_H264_HIGH_444_PREDICTIVE;

             } else {
                 av_log(avctx, AV_LOG_FATAL, "Profile \"%s\" is unknown! Supported profiles: high, main, baseline\n", ctx->profile);
                 res = AVERROR(EINVAL);
                 goto error;
             }
         }

         ctx->encode_config.encodeCodecConfig.h264Config.chromaFormatIDC = avctx->profile == FF_PROFILE_H264_HIGH_444_PREDICTIVE ? 3 : 1;
 

         if (ctx->level) {
             res = input_string_to_uint32(avctx, nvenc_h264_level_pairs, ctx->level, &ctx->encode_config.encodeCodecConfig.h264Config.level);
 
             if (res) {
                 av_log(avctx, AV_LOG_FATAL, "Level \"%s\" is unknown! Supported levels: auto, 1, 1b, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2, 5, 5.1\n", ctx->level);
                 goto error;
             }
         } else {
             ctx->encode_config.encodeCodecConfig.h264Config.level = NV_ENC_LEVEL_AUTOSELECT;
         }
 

         break;
     case AV_CODEC_ID_H265:

         ctx->encode_config.encodeCodecConfig.hevcConfig.disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
         ctx->encode_config.encodeCodecConfig.hevcConfig.repeatSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;

 
         /* No other profile is supported in the current SDK version 5 */
         ctx->encode_config.profileGUID = NV_ENC_HEVC_PROFILE_MAIN_GUID;
         avctx->profile = FF_PROFILE_HEVC_MAIN;

 
         if (ctx->level) {

             res = input_string_to_uint32(avctx, nvenc_hevc_level_pairs, ctx->level, &ctx->encode_config.encodeCodecConfig.hevcConfig.level);

 
             if (res) {
                 av_log(avctx, AV_LOG_FATAL, "Level \"%s\" is unknown! Supported levels: auto, 1, 2, 2.1, 3, 3.1, 4, 4.1, 5, 5.1, 5.2, 6, 6.1, 6.2\n", ctx->level);
                 goto error;
             }
         } else {
             ctx->encode_config.encodeCodecConfig.hevcConfig.level = NV_ENC_LEVEL_AUTOSELECT;
         }
 
         if (ctx->tier) {
             if (!strcmp(ctx->tier, "main")) {
                 ctx->encode_config.encodeCodecConfig.hevcConfig.tier = NV_ENC_TIER_HEVC_MAIN;
             } else if (!strcmp(ctx->tier, "high")) {
                 ctx->encode_config.encodeCodecConfig.hevcConfig.tier = NV_ENC_TIER_HEVC_HIGH;
             } else {
                 av_log(avctx, AV_LOG_FATAL, "Tier \"%s\" is unknown! Supported tiers: main, high\n", ctx->tier);
                 res = AVERROR(EINVAL);
                 goto error;
             }
         }
 

         break;
     /* Earlier switch/case will return if unknown codec is passed. */
     }

 
     nv_status = p_nvenc->nvEncInitializeEncoder(ctx->nvencoder, &ctx->init_encode_params);
     if (nv_status != NV_ENC_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, "InitializeEncoder failed: 0x%x\n", (int)nv_status);
         res = AVERROR_EXTERNAL;
         goto error;
     }
 
     ctx->input_surfaces = av_malloc(ctx->max_surface_count * sizeof(*ctx->input_surfaces));
 
     if (!ctx->input_surfaces) {
         res = AVERROR(ENOMEM);
         goto error;
     }
 
     ctx->output_surfaces = av_malloc(ctx->max_surface_count * sizeof(*ctx->output_surfaces));
 
     if (!ctx->output_surfaces) {
         res = AVERROR(ENOMEM);
         goto error;
     }
 
     for (surfaceCount = 0; surfaceCount < ctx->max_surface_count; ++surfaceCount) {
         NV_ENC_CREATE_INPUT_BUFFER allocSurf = { 0 };
         NV_ENC_CREATE_BITSTREAM_BUFFER allocOut = { 0 };
         allocSurf.version = NV_ENC_CREATE_INPUT_BUFFER_VER;
         allocOut.version = NV_ENC_CREATE_BITSTREAM_BUFFER_VER;
 
         allocSurf.width = (avctx->width + 31) & ~31;
         allocSurf.height = (avctx->height + 31) & ~31;
 
         allocSurf.memoryHeap = NV_ENC_MEMORY_HEAP_SYSMEM_CACHED;
 
         switch (avctx->pix_fmt) {
         case AV_PIX_FMT_YUV420P:
             allocSurf.bufferFmt = NV_ENC_BUFFER_FORMAT_YV12_PL;
             break;
 
         case AV_PIX_FMT_NV12:
             allocSurf.bufferFmt = NV_ENC_BUFFER_FORMAT_NV12_PL;
             break;
 
         case AV_PIX_FMT_YUV444P:
             allocSurf.bufferFmt = NV_ENC_BUFFER_FORMAT_YUV444_PL;
             break;
 
         default:
             av_log(avctx, AV_LOG_FATAL, "Invalid input pixel format\n");
             res = AVERROR(EINVAL);
             goto error;
         }
 
         nv_status = p_nvenc->nvEncCreateInputBuffer(ctx->nvencoder, &allocSurf);

         if (nv_status != NV_ENC_SUCCESS) {

             av_log(avctx, AV_LOG_FATAL, "CreateInputBuffer failed\n");
             res = AVERROR_EXTERNAL;
             goto error;
         }
 
         ctx->input_surfaces[surfaceCount].lockCount = 0;
         ctx->input_surfaces[surfaceCount].input_surface = allocSurf.inputBuffer;
         ctx->input_surfaces[surfaceCount].format = allocSurf.bufferFmt;
         ctx->input_surfaces[surfaceCount].width = allocSurf.width;
         ctx->input_surfaces[surfaceCount].height = allocSurf.height;
 
         /* 1MB is large enough to hold most output frames. NVENC increases this automaticaly if it's not enough. */
         allocOut.size = 1024 * 1024;
 
         allocOut.memoryHeap = NV_ENC_MEMORY_HEAP_SYSMEM_CACHED;
 
         nv_status = p_nvenc->nvEncCreateBitstreamBuffer(ctx->nvencoder, &allocOut);

         if (nv_status != NV_ENC_SUCCESS) {

             av_log(avctx, AV_LOG_FATAL, "CreateBitstreamBuffer failed\n");
             ctx->output_surfaces[surfaceCount++].output_surface = NULL;
             res = AVERROR_EXTERNAL;
             goto error;
         }
 
         ctx->output_surfaces[surfaceCount].output_surface = allocOut.bitstreamBuffer;
         ctx->output_surfaces[surfaceCount].size = allocOut.size;
         ctx->output_surfaces[surfaceCount].busy = 0;
     }
 

     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {

         uint32_t outSize = 0;
         char tmpHeader[256];
         NV_ENC_SEQUENCE_PARAM_PAYLOAD payload = { 0 };
         payload.version = NV_ENC_SEQUENCE_PARAM_PAYLOAD_VER;
 
         payload.spsppsBuffer = tmpHeader;
         payload.inBufferSize = sizeof(tmpHeader);
         payload.outSPSPPSPayloadSize = &outSize;
 
         nv_status = p_nvenc->nvEncGetSequenceParams(ctx->nvencoder, &payload);
         if (nv_status != NV_ENC_SUCCESS) {
             av_log(avctx, AV_LOG_FATAL, "GetSequenceParams failed\n");
             goto error;
         }
 
         avctx->extradata_size = outSize;

         avctx->extradata = av_mallocz(outSize + AV_INPUT_BUFFER_PADDING_SIZE);

 
         if (!avctx->extradata) {
             res = AVERROR(ENOMEM);
             goto error;
         }
 
         memcpy(avctx->extradata, tmpHeader, outSize);
     }
 
     if (ctx->encode_config.frameIntervalP > 1)
         avctx->has_b_frames = 2;
 
     if (ctx->encode_config.rcParams.averageBitRate > 0)
         avctx->bit_rate = ctx->encode_config.rcParams.averageBitRate;
 
     return 0;
 
 error:
 
     for (i = 0; i < surfaceCount; ++i) {
         p_nvenc->nvEncDestroyInputBuffer(ctx->nvencoder, ctx->input_surfaces[i].input_surface);
         if (ctx->output_surfaces[i].output_surface)
             p_nvenc->nvEncDestroyBitstreamBuffer(ctx->nvencoder, ctx->output_surfaces[i].output_surface);
     }
 
     if (ctx->nvencoder)
         p_nvenc->nvEncDestroyEncoder(ctx->nvencoder);
 
     if (ctx->cu_context)
         dl_fn->cu_ctx_destroy(ctx->cu_context);
 
     nvenc_unload_nvenc(avctx);
 
     ctx->nvencoder = NULL;
     ctx->cu_context = NULL;
 
     return res;
 }
 
 static av_cold int nvenc_encode_close(AVCodecContext *avctx)
 {
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
     NV_ENCODE_API_FUNCTION_LIST *p_nvenc = &dl_fn->nvenc_funcs;
     int i;
 
     av_freep(&ctx->timestamp_list.data);
     av_freep(&ctx->output_surface_ready_queue.data);
     av_freep(&ctx->output_surface_queue.data);
 
     for (i = 0; i < ctx->max_surface_count; ++i) {
         p_nvenc->nvEncDestroyInputBuffer(ctx->nvencoder, ctx->input_surfaces[i].input_surface);
         p_nvenc->nvEncDestroyBitstreamBuffer(ctx->nvencoder, ctx->output_surfaces[i].output_surface);
     }
     ctx->max_surface_count = 0;
 
     p_nvenc->nvEncDestroyEncoder(ctx->nvencoder);
     ctx->nvencoder = NULL;
 
     dl_fn->cu_ctx_destroy(ctx->cu_context);
     ctx->cu_context = NULL;
 
     nvenc_unload_nvenc(avctx);
 
     return 0;
 }
 

 static int process_output_surface(AVCodecContext *avctx, AVPacket *pkt, NvencOutputSurface *tmpoutsurf)

 {
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
     NV_ENCODE_API_FUNCTION_LIST *p_nvenc = &dl_fn->nvenc_funcs;
 

     uint32_t slice_mode_data;
     uint32_t *slice_offsets;

     NV_ENC_LOCK_BITSTREAM lock_params = { 0 };
     NVENCSTATUS nv_status;
     int res = 0;
 

     switch (avctx->codec->id) {
     case AV_CODEC_ID_H264:
       slice_mode_data = ctx->encode_config.encodeCodecConfig.h264Config.sliceModeData;
       break;
     case AV_CODEC_ID_H265:
       slice_mode_data = ctx->encode_config.encodeCodecConfig.hevcConfig.sliceModeData;
       break;
     default:
       av_log(avctx, AV_LOG_ERROR, "nvenc: Unknown codec name\n");
       res = AVERROR(EINVAL);
       goto error;
     }
     slice_offsets = av_mallocz(slice_mode_data * sizeof(*slice_offsets));
 

     if (!slice_offsets)
         return AVERROR(ENOMEM);
 
     lock_params.version = NV_ENC_LOCK_BITSTREAM_VER;
 
     lock_params.doNotWait = 0;
     lock_params.outputBitstream = tmpoutsurf->output_surface;
     lock_params.sliceOffsets = slice_offsets;
 
     nv_status = p_nvenc->nvEncLockBitstream(ctx->nvencoder, &lock_params);
     if (nv_status != NV_ENC_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed locking bitstream buffer\n");
         res = AVERROR_EXTERNAL;
         goto error;
     }
 

     if (res = ff_alloc_packet2(avctx, pkt, lock_params.bitstreamSizeInBytes, 0)) {

         p_nvenc->nvEncUnlockBitstream(ctx->nvencoder, tmpoutsurf->output_surface);
         goto error;
     }
 
     memcpy(pkt->data, lock_params.bitstreamBufferPtr, lock_params.bitstreamSizeInBytes);
 
     nv_status = p_nvenc->nvEncUnlockBitstream(ctx->nvencoder, tmpoutsurf->output_surface);
     if (nv_status != NV_ENC_SUCCESS)
         av_log(avctx, AV_LOG_ERROR, "Failed unlocking bitstream buffer, expect the gates of mordor to open\n");
 
     switch (lock_params.pictureType) {
     case NV_ENC_PIC_TYPE_IDR:
         pkt->flags |= AV_PKT_FLAG_KEY;

 #if FF_API_CODED_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS

     case NV_ENC_PIC_TYPE_I:
         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
         break;
     case NV_ENC_PIC_TYPE_P:
         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
         break;
     case NV_ENC_PIC_TYPE_B:
         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;
         break;
     case NV_ENC_PIC_TYPE_BI:
         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_BI;
         break;
     default:
         av_log(avctx, AV_LOG_ERROR, "Unknown picture type encountered, expect the output to be broken.\n");
         av_log(avctx, AV_LOG_ERROR, "Please report this error and include as much information on how to reproduce it as possible.\n");
         res = AVERROR_EXTERNAL;
         goto error;

 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

     }
 
     pkt->pts = lock_params.outputTimeStamp;
     pkt->dts = timestamp_queue_dequeue(&ctx->timestamp_list);
 

     /* when there're b frame(s), set dts offset */

     if (ctx->encode_config.frameIntervalP >= 2)
         pkt->dts -= 1;
 

     if (pkt->dts > pkt->pts)
         pkt->dts = pkt->pts;
 
     if (ctx->last_dts != AV_NOPTS_VALUE && pkt->dts <= ctx->last_dts)
         pkt->dts = ctx->last_dts + 1;
 
     ctx->last_dts = pkt->dts;
 
     av_free(slice_offsets);
 
     return 0;
 
 error:
 
     av_free(slice_offsets);
     timestamp_queue_dequeue(&ctx->timestamp_list);
 
     return res;
 }
 
 static int nvenc_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     const AVFrame *frame, int *got_packet)
 {
     NVENCSTATUS nv_status;
     NvencOutputSurface *tmpoutsurf;
     int res, i = 0;
 
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
     NV_ENCODE_API_FUNCTION_LIST *p_nvenc = &dl_fn->nvenc_funcs;
 
     NV_ENC_PIC_PARAMS pic_params = { 0 };
     pic_params.version = NV_ENC_PIC_PARAMS_VER;
 
     if (frame) {
         NV_ENC_LOCK_INPUT_BUFFER lockBufferParams = { 0 };
         NvencInputSurface *inSurf = NULL;
 
         for (i = 0; i < ctx->max_surface_count; ++i) {
             if (!ctx->input_surfaces[i].lockCount) {
                 inSurf = &ctx->input_surfaces[i];
                 break;
             }
         }
 
         av_assert0(inSurf);
 
         inSurf->lockCount = 1;
 
         lockBufferParams.version = NV_ENC_LOCK_INPUT_BUFFER_VER;
         lockBufferParams.inputBuffer = inSurf->input_surface;
 
         nv_status = p_nvenc->nvEncLockInputBuffer(ctx->nvencoder, &lockBufferParams);
         if (nv_status != NV_ENC_SUCCESS) {
             av_log(avctx, AV_LOG_ERROR, "Failed locking nvenc input buffer\n");
             return 0;
         }
 
         if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
             uint8_t *buf = lockBufferParams.bufferDataPtr;
 
             av_image_copy_plane(buf, lockBufferParams.pitch,
                 frame->data[0], frame->linesize[0],
                 avctx->width, avctx->height);
 
             buf += inSurf->height * lockBufferParams.pitch;
 
             av_image_copy_plane(buf, lockBufferParams.pitch >> 1,
                 frame->data[2], frame->linesize[2],
                 avctx->width >> 1, avctx->height >> 1);
 
             buf += (inSurf->height * lockBufferParams.pitch) >> 2;
 
             av_image_copy_plane(buf, lockBufferParams.pitch >> 1,
                 frame->data[1], frame->linesize[1],
                 avctx->width >> 1, avctx->height >> 1);
         } else if (avctx->pix_fmt == AV_PIX_FMT_NV12) {
             uint8_t *buf = lockBufferParams.bufferDataPtr;
 
             av_image_copy_plane(buf, lockBufferParams.pitch,
                 frame->data[0], frame->linesize[0],
                 avctx->width, avctx->height);
 
             buf += inSurf->height * lockBufferParams.pitch;
 
             av_image_copy_plane(buf, lockBufferParams.pitch,
                 frame->data[1], frame->linesize[1],
                 avctx->width, avctx->height >> 1);
         } else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P) {
             uint8_t *buf = lockBufferParams.bufferDataPtr;
 
             av_image_copy_plane(buf, lockBufferParams.pitch,
                 frame->data[0], frame->linesize[0],
                 avctx->width, avctx->height);
 
             buf += inSurf->height * lockBufferParams.pitch;
 
             av_image_copy_plane(buf, lockBufferParams.pitch,
                 frame->data[1], frame->linesize[1],
                 avctx->width, avctx->height);
 
             buf += inSurf->height * lockBufferParams.pitch;
 
             av_image_copy_plane(buf, lockBufferParams.pitch,
                 frame->data[2], frame->linesize[2],
                 avctx->width, avctx->height);
         } else {
             av_log(avctx, AV_LOG_FATAL, "Invalid pixel format!\n");
             return AVERROR(EINVAL);
         }
 
         nv_status = p_nvenc->nvEncUnlockInputBuffer(ctx->nvencoder, inSurf->input_surface);
         if (nv_status != NV_ENC_SUCCESS) {
             av_log(avctx, AV_LOG_FATAL, "Failed unlocking input buffer!\n");
             return AVERROR_EXTERNAL;
         }
 
         for (i = 0; i < ctx->max_surface_count; ++i)
             if (!ctx->output_surfaces[i].busy)
                 break;
 
         if (i == ctx->max_surface_count) {
             inSurf->lockCount = 0;
             av_log(avctx, AV_LOG_FATAL, "No free output surface found!\n");
             return AVERROR_EXTERNAL;
         }
 
         ctx->output_surfaces[i].input_surface = inSurf;
 
         pic_params.inputBuffer = inSurf->input_surface;
         pic_params.bufferFmt = inSurf->format;
         pic_params.inputWidth = avctx->width;
         pic_params.inputHeight = avctx->height;
         pic_params.outputBitstream = ctx->output_surfaces[i].output_surface;
         pic_params.completionEvent = 0;
 

         if (avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {

             if (frame->top_field_first) {
                 pic_params.pictureStruct = NV_ENC_PIC_STRUCT_FIELD_TOP_BOTTOM;
             } else {
                 pic_params.pictureStruct = NV_ENC_PIC_STRUCT_FIELD_BOTTOM_TOP;
             }
         } else {
             pic_params.pictureStruct = NV_ENC_PIC_STRUCT_FRAME;
         }
 
         pic_params.encodePicFlags = 0;
         pic_params.inputTimeStamp = frame->pts;
         pic_params.inputDuration = 0;

         switch (avctx->codec->id) {
         case AV_CODEC_ID_H264:
           pic_params.codecPicParams.h264PicParams.sliceMode = ctx->encode_config.encodeCodecConfig.h264Config.sliceMode;
           pic_params.codecPicParams.h264PicParams.sliceModeData = ctx->encode_config.encodeCodecConfig.h264Config.sliceModeData;
           break;
         case AV_CODEC_ID_H265:
           pic_params.codecPicParams.hevcPicParams.sliceMode = ctx->encode_config.encodeCodecConfig.hevcConfig.sliceMode;
           pic_params.codecPicParams.hevcPicParams.sliceModeData = ctx->encode_config.encodeCodecConfig.hevcConfig.sliceModeData;
           break;
         default:
           av_log(avctx, AV_LOG_ERROR, "nvenc: Unknown codec name\n");
           return AVERROR(EINVAL);
         }

         res = timestamp_queue_enqueue(&ctx->timestamp_list, frame->pts);
 
         if (res)
             return res;
     } else {
         pic_params.encodePicFlags = NV_ENC_PIC_FLAG_EOS;
     }
 
     nv_status = p_nvenc->nvEncEncodePicture(ctx->nvencoder, &pic_params);
 
     if (frame && nv_status == NV_ENC_ERR_NEED_MORE_INPUT) {
         res = out_surf_queue_enqueue(&ctx->output_surface_queue, &ctx->output_surfaces[i]);
 
         if (res)
             return res;
 
         ctx->output_surfaces[i].busy = 1;
     }
 
     if (nv_status != NV_ENC_SUCCESS && nv_status != NV_ENC_ERR_NEED_MORE_INPUT) {
         av_log(avctx, AV_LOG_ERROR, "EncodePicture failed!\n");
         return AVERROR_EXTERNAL;
     }
 
     if (nv_status != NV_ENC_ERR_NEED_MORE_INPUT) {
         while (ctx->output_surface_queue.count) {
             tmpoutsurf = out_surf_queue_dequeue(&ctx->output_surface_queue);
             res = out_surf_queue_enqueue(&ctx->output_surface_ready_queue, tmpoutsurf);
 
             if (res)
                 return res;
         }
 
         if (frame) {
             res = out_surf_queue_enqueue(&ctx->output_surface_ready_queue, &ctx->output_surfaces[i]);
 
             if (res)
                 return res;
 
             ctx->output_surfaces[i].busy = 1;
         }
     }
 

     if (ctx->output_surface_ready_queue.count && (!frame || ctx->output_surface_ready_queue.count + ctx->output_surface_queue.count >= ctx->buffer_delay)) {

         tmpoutsurf = out_surf_queue_dequeue(&ctx->output_surface_ready_queue);
 

         res = process_output_surface(avctx, pkt, tmpoutsurf);

 
         if (res)
             return res;
 
         tmpoutsurf->busy = 0;
         av_assert0(tmpoutsurf->input_surface->lockCount);
         tmpoutsurf->input_surface->lockCount--;
 
         *got_packet = 1;
     } else {
         *got_packet = 0;
     }
 
     return 0;
 }
 

 static const enum AVPixelFormat pix_fmts_nvenc[] = {

     AV_PIX_FMT_YUV420P,

     AV_PIX_FMT_NV12,

     AV_PIX_FMT_YUV444P,

     AV_PIX_FMT_NONE
 };
 
 #define OFFSET(x) offsetof(NvencContext, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
     { "preset", "Set the encoding preset (one of hq, hp, bd, ll, llhq, llhp, default)", OFFSET(preset), AV_OPT_TYPE_STRING, { .str = "hq" }, 0, 0, VE },

     { "profile", "Set the encoding profile (high, main or baseline)", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
     { "level", "Set the encoding level restriction (auto, 1.0, 1.0b, 1.1, 1.2, ..., 4.2, 5.0, 5.1)", OFFSET(level), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
     { "tier", "Set the encoding tier (main or high)", OFFSET(tier), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },

     { "cbr", "Use cbr encoding mode", OFFSET(cbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },

     { "2pass", "Use 2pass cbr encoding mode", OFFSET(twopass), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },

     { "gpu", "Selects which NVENC capable GPU to use. First GPU is 0, second is 1, and so on.", OFFSET(gpu), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },

     { "delay", "Delays frame output by the given amount of frames.", OFFSET(buffer_delay), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 0, INT_MAX, VE },

     { NULL }
 };
 
 static const AVCodecDefault nvenc_defaults[] = {
     { "b", "0" },
     { "qmin", "-1" },
     { "qmax", "-1" },
     { "qdiff", "-1" },
     { "qblur", "-1" },
     { "qcomp", "-1" },
     { NULL },
 };
 

 #if CONFIG_NVENC_ENCODER

 static const AVClass nvenc_class = {
     .class_name = "nvenc",
     .item_name = av_default_item_name,
     .option = options,
     .version = LIBAVUTIL_VERSION_INT,
 };
 

 AVCodec ff_nvenc_encoder = {
     .name = "nvenc",
     .long_name = NULL_IF_CONFIG_SMALL("Nvidia NVENC h264 encoder"),
     .type = AVMEDIA_TYPE_VIDEO,
     .id = AV_CODEC_ID_H264,
     .priv_data_size = sizeof(NvencContext),
     .init = nvenc_encode_init,
     .encode2 = nvenc_encode_frame,
     .close = nvenc_encode_close,

     .capabilities = AV_CODEC_CAP_DELAY,

     .priv_class = &nvenc_class,
     .defaults = nvenc_defaults,
     .pix_fmts = pix_fmts_nvenc,
 };

 #endif
 

 /* Add an alias for nvenc_h264 */
 #if CONFIG_NVENC_H264_ENCODER
 static const AVClass nvenc_h264_class = {
     .class_name = "nvenc_h264",
     .item_name = av_default_item_name,
     .option = options,
     .version = LIBAVUTIL_VERSION_INT,
 };
 
 AVCodec ff_nvenc_h264_encoder = {
     .name = "nvenc_h264",
     .long_name = NULL_IF_CONFIG_SMALL("Nvidia NVENC h264 encoder"),
     .type = AVMEDIA_TYPE_VIDEO,
     .id = AV_CODEC_ID_H264,
     .priv_data_size = sizeof(NvencContext),
     .init = nvenc_encode_init,
     .encode2 = nvenc_encode_frame,
     .close = nvenc_encode_close,

     .capabilities = AV_CODEC_CAP_DELAY,

     .priv_class = &nvenc_h264_class,
     .defaults = nvenc_defaults,
     .pix_fmts = pix_fmts_nvenc,
 };
 #endif
 

 #if CONFIG_NVENC_HEVC_ENCODER
 static const AVClass nvenc_hevc_class = {
     .class_name = "nvenc_hevc",

     .item_name = av_default_item_name,
     .option = options,
     .version = LIBAVUTIL_VERSION_INT,
 };
 

 AVCodec ff_nvenc_hevc_encoder = {
     .name = "nvenc_hevc",
     .long_name = NULL_IF_CONFIG_SMALL("Nvidia NVENC hevc encoder"),

     .type = AVMEDIA_TYPE_VIDEO,
     .id = AV_CODEC_ID_H265,
     .priv_data_size = sizeof(NvencContext),
     .init = nvenc_encode_init,
     .encode2 = nvenc_encode_frame,
     .close = nvenc_encode_close,

     .capabilities = AV_CODEC_CAP_DELAY,

     .priv_class = &nvenc_hevc_class,

     .defaults = nvenc_defaults,
     .pix_fmts = pix_fmts_nvenc,
 };
 #endif