libavcodec/nvenc.c

   1 /*
   2  * NVIDIA NVENC Support
   3  * Copyright (C) 2015 Luca Barbato
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <cuda.h>
  25 #include <nvEncodeAPI.h>
  26 #include <string.h>
  27
  28 #define CUDA_LIBNAME "libcuda.so"
  29
  30 #if HAVE_DLFCN_H
  31 #include <dlfcn.h>
  32
  33 #define NVENC_LIBNAME "libnvidia-encode.so"
  34
  35 #elif HAVE_WINDOWS_H
  36 #include <windows.h>
  37
  38 #if ARCH_X86_64
  39 #define NVENC_LIBNAME "nvEncodeAPI64.dll"
  40 #else
  41 #define NVENC_LIBNAME "nvEncodeAPI.dll"
  42 #endif
  43
  44 #define dlopen(filename, flags) LoadLibrary((filename))
  45 #define dlsym(handle, symbol)   GetProcAddress(handle, symbol)
  46 #define dlclose(handle)         FreeLibrary(handle)
  47 #endif
  48
  49 #include "libavutil/common.h"
  50 #include "libavutil/imgutils.h"
  51 #include "libavutil/mem.h"
  52 #include "avcodec.h"
  53 #include "internal.h"
  54 #include "nvenc.h"
  55
  56 #define NVENC_CAP 0x30
  57 #define BITSTREAM_BUFFER_SIZE 1024 * 1024
  58
  59 #define LOAD_LIBRARY(l, path)                   \
  60     do {                                        \
  61         if (!((l) = dlopen(path, RTLD_LAZY))) { \
  62             av_log(avctx, AV_LOG_ERROR,         \
  63                    "Cannot load %s\n",          \
  64                    path);                       \
  65             return AVERROR_UNKNOWN;             \
  66         }                                       \
  67     } while (0)
  68
  69 #define LOAD_SYMBOL(fun, lib, symbol)        \
  70     do {                                     \
  71         if (!((fun) = dlsym(lib, symbol))) { \
  72             av_log(avctx, AV_LOG_ERROR,      \
  73                    "Cannot load %s\n",       \
  74                    symbol);                  \
  75             return AVERROR_UNKNOWN;          \
  76         }                                    \
  77     } while (0)
  78
  79 static const struct {
  80     NVENCSTATUS nverr;
  81     int         averr;
  82     const char *desc;
  83 } nvenc_errors[] = {
  84     { NV_ENC_SUCCESS,                      0,                "success"                  },
  85     { NV_ENC_ERR_NO_ENCODE_DEVICE,         AVERROR(ENOENT),  "no encode device"         },
  86     { NV_ENC_ERR_UNSUPPORTED_DEVICE,       AVERROR(ENOSYS),  "unsupported device"       },
  87     { NV_ENC_ERR_INVALID_ENCODERDEVICE,    AVERROR(EINVAL),  "invalid encoder device"   },
  88     { NV_ENC_ERR_INVALID_DEVICE,           AVERROR(EINVAL),  "invalid device"           },
  89     { NV_ENC_ERR_DEVICE_NOT_EXIST,         AVERROR(EIO),     "device does not exist"    },
  90     { NV_ENC_ERR_INVALID_PTR,              AVERROR(EFAULT),  "invalid ptr"              },
  91     { NV_ENC_ERR_INVALID_EVENT,            AVERROR(EINVAL),  "invalid event"            },
  92     { NV_ENC_ERR_INVALID_PARAM,            AVERROR(EINVAL),  "invalid param"            },
  93     { NV_ENC_ERR_INVALID_CALL,             AVERROR(EINVAL),  "invalid call"             },
  94     { NV_ENC_ERR_OUT_OF_MEMORY,            AVERROR(ENOMEM),  "out of memory"            },
  95     { NV_ENC_ERR_ENCODER_NOT_INITIALIZED,  AVERROR(EINVAL),  "encoder not initialized"  },
  96     { NV_ENC_ERR_UNSUPPORTED_PARAM,        AVERROR(ENOSYS),  "unsupported param"        },
  97     { NV_ENC_ERR_LOCK_BUSY,                AVERROR(EAGAIN),  "lock busy"                },
  98     { NV_ENC_ERR_NOT_ENOUGH_BUFFER,        AVERROR(ENOBUFS), "not enough buffer"        },
  99     { NV_ENC_ERR_INVALID_VERSION,          AVERROR(EINVAL),  "invalid version"          },
 100     { NV_ENC_ERR_MAP_FAILED,               AVERROR(EIO),     "map failed"               },
 101     { NV_ENC_ERR_NEED_MORE_INPUT,          AVERROR(EAGAIN),  "need more input"          },
 102     { NV_ENC_ERR_ENCODER_BUSY,             AVERROR(EAGAIN),  "encoder busy"             },
 103     { NV_ENC_ERR_EVENT_NOT_REGISTERD,      AVERROR(EBADF),   "event not registered"     },
 104     { NV_ENC_ERR_GENERIC,                  AVERROR_UNKNOWN,  "generic error"            },
 105     { NV_ENC_ERR_INCOMPATIBLE_CLIENT_KEY,  AVERROR(EINVAL),  "incompatible client key"  },
 106     { NV_ENC_ERR_UNIMPLEMENTED,            AVERROR(ENOSYS),  "unimplemented"            },
 107     { NV_ENC_ERR_RESOURCE_REGISTER_FAILED, AVERROR(EIO),     "resource register failed" },
 108     { NV_ENC_ERR_RESOURCE_NOT_REGISTERED,  AVERROR(EBADF),   "resource not registered"  },
 109     { NV_ENC_ERR_RESOURCE_NOT_MAPPED,      AVERROR(EBADF),   "resource not mapped"      },
 110 };
 111
 112 static int nvenc_map_error(NVENCSTATUS err, const char **desc)
 113 {
 114     int i;
 115     for (i = 0; i < FF_ARRAY_ELEMS(nvenc_errors); i++) {
 116         if (nvenc_errors[i].nverr == err) {
 117             if (desc)
 118                 *desc = nvenc_errors[i].desc;
 119             return nvenc_errors[i].averr;
 120         }
 121     }
 122     if (desc)
 123         *desc = "unknown error";
 124     return AVERROR_UNKNOWN;
 125 }
 126
 127 static int nvenc_print_error(void *log_ctx, NVENCSTATUS err,
 128                              const char *error_string)
 129 {
 130     const char *desc;
 131     int ret;
 132     ret = nvenc_map_error(err, &desc);
 133     av_log(log_ctx, AV_LOG_ERROR, "%s: %s (%d)\n", error_string, desc, err);
 134     return ret;
 135 }
 136
 137 static av_cold int nvenc_load_libraries(AVCodecContext *avctx)
 138 {
 139     NVENCContext *ctx         = avctx->priv_data;
 140     NVENCLibraryContext *nvel = &ctx->nvel;
 141     PNVENCODEAPICREATEINSTANCE nvenc_create_instance;
 142     NVENCSTATUS err;
 143
 144     LOAD_LIBRARY(nvel->cuda, CUDA_LIBNAME);
 145
 146     LOAD_SYMBOL(nvel->cu_init, nvel->cuda, "cuInit");
 147     LOAD_SYMBOL(nvel->cu_device_get_count, nvel->cuda, "cuDeviceGetCount");
 148     LOAD_SYMBOL(nvel->cu_device_get, nvel->cuda, "cuDeviceGet");
 149     LOAD_SYMBOL(nvel->cu_device_get_name, nvel->cuda, "cuDeviceGetName");
 150     LOAD_SYMBOL(nvel->cu_device_compute_capability, nvel->cuda,
 151                 "cuDeviceComputeCapability");
 152     LOAD_SYMBOL(nvel->cu_ctx_create, nvel->cuda, "cuCtxCreate_v2");
 153     LOAD_SYMBOL(nvel->cu_ctx_pop_current, nvel->cuda, "cuCtxPopCurrent_v2");
 154     LOAD_SYMBOL(nvel->cu_ctx_destroy, nvel->cuda, "cuCtxDestroy_v2");
 155
 156     LOAD_LIBRARY(nvel->nvenc, NVENC_LIBNAME);
 157
 158     LOAD_SYMBOL(nvenc_create_instance, nvel->nvenc,
 159                 "NvEncodeAPICreateInstance");
 160
 161     nvel->nvenc_funcs.version = NV_ENCODE_API_FUNCTION_LIST_VER;
 162
 163     err = nvenc_create_instance(&nvel->nvenc_funcs);
 164     if (err != NV_ENC_SUCCESS)
 165         return nvenc_print_error(avctx, err, "Cannot create the NVENC instance");
 166
 167     return 0;
 168 }
 169
 170 static int nvenc_open_session(AVCodecContext *avctx)
 171 {
 172     NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS params = { 0 };
 173     NVENCContext *ctx                           = avctx->priv_data;
 174     NV_ENCODE_API_FUNCTION_LIST *nv             = &ctx->nvel.nvenc_funcs;
 175     int ret;
 176
 177     params.version    = NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS_VER;
 178     params.apiVersion = NVENCAPI_VERSION;
 179     params.device     = ctx->cu_context;
 180     params.deviceType = NV_ENC_DEVICE_TYPE_CUDA;
 181
 182     ret = nv->nvEncOpenEncodeSessionEx(&params, &ctx->nvenc_ctx);
 183     if (ret != NV_ENC_SUCCESS) {
 184         ctx->nvenc_ctx = NULL;
 185         return nvenc_print_error(avctx, ret, "Cannot open the NVENC Session");
 186     }
 187
 188     return 0;
 189 }
 190
 191 static int nvenc_check_codec_support(AVCodecContext *avctx)
 192 {
 193     NVENCContext *ctx               = avctx->priv_data;
 194     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
 195     int i, ret, count = 0;
 196     GUID *guids = NULL;
 197
 198     ret = nv->nvEncGetEncodeGUIDCount(ctx->nvenc_ctx, &count);
 199
 200     if (ret != NV_ENC_SUCCESS || !count)
 201         return AVERROR(ENOSYS);
 202
 203     guids = av_malloc(count * sizeof(GUID));
 204     if (!guids)
 205         return AVERROR(ENOMEM);
 206
 207     ret = nv->nvEncGetEncodeGUIDs(ctx->nvenc_ctx, guids, count, &count);
 208     if (ret != NV_ENC_SUCCESS) {
 209         ret = AVERROR(ENOSYS);
 210         goto fail;
 211     }
 212
 213     ret = AVERROR(ENOSYS);
 214     for (i = 0; i < count; i++) {
 215         if (!memcmp(&guids[i], &ctx->params.encodeGUID, sizeof(*guids))) {
 216             ret = 0;
 217             break;
 218         }
 219     }
 220
 221 fail:
 222     av_free(guids);
 223
 224     return ret;
 225 }
 226
 227 static int nvenc_check_cap(AVCodecContext *avctx, NV_ENC_CAPS cap)
 228 {
 229     NVENCContext *ctx               = avctx->priv_data;
 230     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
 231     NV_ENC_CAPS_PARAM params        = { 0 };
 232     int ret, val = 0;
 233
 234     params.version     = NV_ENC_CAPS_PARAM_VER;
 235     params.capsToQuery = cap;
 236
 237     ret = nv->nvEncGetEncodeCaps(ctx->nvenc_ctx, ctx->params.encodeGUID, &params, &val);
 238
 239     if (ret == NV_ENC_SUCCESS)
 240         return val;
 241     return 0;
 242 }
 243
 244 static int nvenc_check_capabilities(AVCodecContext *avctx)
 245 {
 246     int ret;
 247
 248     ret = nvenc_check_codec_support(avctx);
 249     if (ret < 0) {
 250         av_log(avctx, AV_LOG_VERBOSE, "Codec not supported\n");
 251         return ret;
 252     }
 253
 254     ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_YUV444_ENCODE);
 255     if (avctx->pix_fmt == AV_PIX_FMT_YUV444P && ret <= 0) {
 256         av_log(avctx, AV_LOG_VERBOSE, "YUV444P not supported\n");
 257         return AVERROR(ENOSYS);
 258     }
 259
 260     ret = nvenc_check_cap(avctx, NV_ENC_CAPS_WIDTH_MAX);
 261     if (ret < avctx->width) {
 262         av_log(avctx, AV_LOG_VERBOSE, "Width %d exceeds %d\n",
 263                avctx->width, ret);
 264         return AVERROR(ENOSYS);
 265     }
 266
 267     ret = nvenc_check_cap(avctx, NV_ENC_CAPS_HEIGHT_MAX);
 268     if (ret < avctx->height) {
 269         av_log(avctx, AV_LOG_VERBOSE, "Height %d exceeds %d\n",
 270                avctx->height, ret);
 271         return AVERROR(ENOSYS);
 272     }
 273
 274     ret = nvenc_check_cap(avctx, NV_ENC_CAPS_NUM_MAX_BFRAMES);
 275     if (ret < avctx->max_b_frames) {
 276         av_log(avctx, AV_LOG_VERBOSE, "Max b-frames %d exceed %d\n",
 277                avctx->max_b_frames, ret);
 278
 279         return AVERROR(ENOSYS);
 280     }
 281
 282     return 0;
 283 }
 284
 285 static int nvenc_check_device(AVCodecContext *avctx, int idx)
 286 {
 287     NVENCContext *ctx               = avctx->priv_data;
 288     NVENCLibraryContext *nvel       = &ctx->nvel;
 289     char name[128]                  = { 0 };
 290     int major, minor, ret;
 291     CUdevice cu_device;
 292     CUcontext dummy;
 293     int loglevel = AV_LOG_VERBOSE;
 294
 295     if (ctx->device == LIST_DEVICES)
 296         loglevel = AV_LOG_INFO;
 297
 298     ret = nvel->cu_device_get(&cu_device, idx);
 299     if (ret != CUDA_SUCCESS) {
 300         av_log(avctx, AV_LOG_ERROR,
 301                "Cannot access the CUDA device %d\n",
 302                idx);
 303         return -1;
 304     }
 305
 306     ret = nvel->cu_device_get_name(name, sizeof(name), cu_device);
 307     if (ret != CUDA_SUCCESS)
 308         return -1;
 309
 310     ret = nvel->cu_device_compute_capability(&major, &minor, cu_device);
 311     if (ret != CUDA_SUCCESS)
 312         return -1;
 313
 314     av_log(avctx, loglevel, "Device %d [%s] ", cu_device, name);
 315
 316     if (((major << 4) | minor) < NVENC_CAP)
 317         goto fail;
 318
 319     ret = nvel->cu_ctx_create(&ctx->cu_context, 0, cu_device);
 320     if (ret != CUDA_SUCCESS)
 321         goto fail;
 322
 323     ret = nvel->cu_ctx_pop_current(&dummy);
 324     if (ret != CUDA_SUCCESS)
 325         goto fail2;
 326
 327     if ((ret = nvenc_open_session(avctx)) < 0)
 328         goto fail2;
 329
 330     if ((ret = nvenc_check_capabilities(avctx)) < 0)
 331         goto fail3;
 332
 333     av_log(avctx, loglevel, "supports NVENC\n");
 334
 335     if (ctx->device == cu_device || ctx->device == ANY_DEVICE)
 336         return 0;
 337
 338 fail3:
 339     nvel->nvenc_funcs.nvEncDestroyEncoder(ctx->nvenc_ctx);
 340     ctx->nvenc_ctx = NULL;
 341
 342 fail2:
 343     nvel->cu_ctx_destroy(ctx->cu_context);
 344     ctx->cu_context = NULL;
 345
 346 fail:
 347     if (ret != 0)
 348         av_log(avctx, loglevel, "does not support NVENC (major %d minor %d)\n",
 349                major, minor);
 350
 351     return AVERROR(ENOSYS);
 352 }
 353
 354 static int nvenc_setup_device(AVCodecContext *avctx)
 355 {
 356     NVENCContext *ctx         = avctx->priv_data;
 357     NVENCLibraryContext *nvel = &ctx->nvel;
 358     int i, nb_devices = 0;
 359
 360     if ((nvel->cu_init(0)) != CUDA_SUCCESS) {
 361         av_log(avctx, AV_LOG_ERROR,
 362                "Cannot init CUDA\n");
 363         return AVERROR_UNKNOWN;
 364     }
 365
 366     if ((nvel->cu_device_get_count(&nb_devices)) != CUDA_SUCCESS) {
 367         av_log(avctx, AV_LOG_ERROR,
 368                "Cannot enumerate the CUDA devices\n");
 369         return AVERROR_UNKNOWN;
 370     }
 371
 372     switch (avctx->codec->id) {
 373     case AV_CODEC_ID_H264:
 374         ctx->params.encodeGUID = NV_ENC_CODEC_H264_GUID;
 375         break;
 376     case AV_CODEC_ID_HEVC:
 377         ctx->params.encodeGUID = NV_ENC_CODEC_HEVC_GUID;
 378         break;
 379     default:
 380         return AVERROR_BUG;
 381     }
 382
 383     for (i = 0; i < nb_devices; ++i) {
 384         if ((nvenc_check_device(avctx, i)) >= 0 && ctx->device != LIST_DEVICES)
 385             return 0;
 386     }
 387
 388     if (ctx->device == LIST_DEVICES)
 389         return AVERROR_EXIT;
 390
 391     return AVERROR(ENOSYS);
 392 }
 393
 394 typedef struct GUIDTuple {
 395     const GUID guid;
 396     int flags;
 397 } GUIDTuple;
 398
 399 static int nvec_map_preset(NVENCContext *ctx)
 400 {
 401     GUIDTuple presets[] = {
 402         { NV_ENC_PRESET_DEFAULT_GUID },
 403         { NV_ENC_PRESET_HP_GUID },
 404         { NV_ENC_PRESET_HQ_GUID },
 405         { NV_ENC_PRESET_BD_GUID },
 406         { NV_ENC_PRESET_LOW_LATENCY_DEFAULT_GUID, NVENC_LOWLATENCY },
 407         { NV_ENC_PRESET_LOW_LATENCY_HP_GUID,      NVENC_LOWLATENCY },
 408         { NV_ENC_PRESET_LOW_LATENCY_HQ_GUID,      NVENC_LOWLATENCY },
 409         { NV_ENC_PRESET_LOSSLESS_DEFAULT_GUID,    NVENC_LOSSLESS },
 410         { NV_ENC_PRESET_LOSSLESS_HP_GUID,         NVENC_LOSSLESS },
 411         { { 0 } }
 412     };
 413
 414     GUIDTuple *t = &presets[ctx->preset];
 415
 416     ctx->params.presetGUID = t->guid;
 417     ctx->flags             = t->flags;
 418
 419     return AVERROR(EINVAL);
 420 }
 421
 422 static void set_constqp(AVCodecContext *avctx, NV_ENC_RC_PARAMS *rc)
 423 {
 424     rc->rateControlMode = NV_ENC_PARAMS_RC_CONSTQP;
 425     rc->constQP.qpInterB = avctx->global_quality;
 426     rc->constQP.qpInterP = avctx->global_quality;
 427     rc->constQP.qpIntra  = avctx->global_quality;
 428 }
 429
 430 static void set_vbr(AVCodecContext *avctx, NV_ENC_RC_PARAMS *rc)
 431 {
 432     if (avctx->qmin >= 0) {
 433         rc->enableMinQP    = 1;
 434         rc->minQP.qpInterB = avctx->qmin;
 435         rc->minQP.qpInterP = avctx->qmin;
 436         rc->minQP.qpIntra  = avctx->qmin;
 437     }
 438
 439     if (avctx->qmax >= 0) {
 440         rc->enableMaxQP = 1;
 441         rc->maxQP.qpInterB = avctx->qmax;
 442         rc->maxQP.qpInterP = avctx->qmax;
 443         rc->maxQP.qpIntra  = avctx->qmax;
 444     }
 445 }
 446
 447 static void nvenc_override_rate_control(AVCodecContext *avctx,
 448                                         NV_ENC_RC_PARAMS *rc)
 449 {
 450     NVENCContext *ctx    = avctx->priv_data;
 451
 452     switch (ctx->rc) {
 453     case NV_ENC_PARAMS_RC_CONSTQP:
 454         if (avctx->global_quality < 0) {
 455             av_log(avctx, AV_LOG_WARNING,
 456                    "The constant quality rate-control requires "
 457                    "the 'global_quality' option set.\n");
 458             return;
 459         }
 460         set_constqp(avctx, rc);
 461         return;
 462     case NV_ENC_PARAMS_RC_2_PASS_VBR:
 463     case NV_ENC_PARAMS_RC_VBR:
 464         if (avctx->qmin < 0 && avctx->qmax < 0) {
 465             av_log(avctx, AV_LOG_WARNING,
 466                    "The variable bitrate rate-control requires "
 467                    "the 'qmin' and/or 'qmax' option set.\n");
 468             return;
 469         }
 470     case NV_ENC_PARAMS_RC_VBR_MINQP:
 471         if (avctx->qmin < 0) {
 472             av_log(avctx, AV_LOG_WARNING,
 473                    "The variable bitrate rate-control requires "
 474                    "the 'qmin' option set.\n");
 475             return;
 476         }
 477         set_vbr(avctx, rc);
 478         break;
 479     case NV_ENC_PARAMS_RC_CBR:
 480         break;
 481     case NV_ENC_PARAMS_RC_2_PASS_QUALITY:
 482     case NV_ENC_PARAMS_RC_2_PASS_FRAMESIZE_CAP:
 483         if (!(ctx->flags & NVENC_LOWLATENCY)) {
 484             av_log(avctx, AV_LOG_WARNING,
 485                    "The multipass rate-control requires "
 486                    "a low-latency preset.\n");
 487             return;
 488         }
 489     }
 490
 491     rc->rateControlMode = ctx->rc;
 492 }
 493
 494 static void nvenc_setup_rate_control(AVCodecContext *avctx)
 495 {
 496     NVENCContext *ctx    = avctx->priv_data;
 497     NV_ENC_RC_PARAMS *rc = &ctx->config.rcParams;
 498
 499     if (avctx->bit_rate > 0)
 500         rc->averageBitRate = avctx->bit_rate;
 501
 502     if (avctx->rc_max_rate > 0)
 503         rc->maxBitRate = avctx->rc_max_rate;
 504
 505     if (ctx->rc > 0) {
 506         nvenc_override_rate_control(avctx, rc);
 507     } else if (avctx->global_quality > 0) {
 508         set_constqp(avctx, rc);
 509     } else if (avctx->qmin >= 0 && avctx->qmax >= 0) {
 510         rc->rateControlMode = NV_ENC_PARAMS_RC_VBR;
 511         set_vbr(avctx, rc);
 512     }
 513
 514     if (avctx->rc_buffer_size > 0)
 515         rc->vbvBufferSize = avctx->rc_buffer_size;
 516
 517     if (rc->averageBitRate > 0)
 518         avctx->bit_rate = rc->averageBitRate;
 519 }
 520
 521 static int nvenc_setup_h264_config(AVCodecContext *avctx)
 522 {
 523     NVENCContext *ctx                      = avctx->priv_data;
 524     NV_ENC_CONFIG *cc                      = &ctx->config;
 525     NV_ENC_CONFIG_H264 *h264               = &cc->encodeCodecConfig.h264Config;
 526     NV_ENC_CONFIG_H264_VUI_PARAMETERS *vui = &h264->h264VUIParameters;
 527
 528     vui->colourDescriptionPresentFlag = 1;
 529     vui->videoSignalTypePresentFlag   = 1;
 530
 531     vui->colourMatrix            = avctx->colorspace;
 532     vui->colourPrimaries         = avctx->color_primaries;
 533     vui->transferCharacteristics = avctx->color_trc;
 534
 535     vui->videoFullRangeFlag = avctx->color_range == AVCOL_RANGE_JPEG;
 536
 537     h264->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
 538     h264->repeatSPSPPS  = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;
 539
 540     h264->maxNumRefFrames = avctx->refs;
 541     h264->idrPeriod       = cc->gopLength;
 542
 543     if (ctx->profile)
 544         avctx->profile = ctx->profile;
 545
 546     if (avctx->pix_fmt == AV_PIX_FMT_YUV444P)
 547         h264->chromaFormatIDC = 3;
 548     else
 549         h264->chromaFormatIDC = 1;
 550
 551     switch (ctx->profile) {
 552     case NV_ENC_H264_PROFILE_BASELINE:
 553         cc->profileGUID = NV_ENC_H264_PROFILE_BASELINE_GUID;
 554         break;
 555     case NV_ENC_H264_PROFILE_MAIN:
 556         cc->profileGUID = NV_ENC_H264_PROFILE_MAIN_GUID;
 557         break;
 558     case NV_ENC_H264_PROFILE_HIGH:
 559         cc->profileGUID = NV_ENC_H264_PROFILE_HIGH_GUID;
 560         break;
 561     case NV_ENC_H264_PROFILE_HIGH_444:
 562         cc->profileGUID = NV_ENC_H264_PROFILE_HIGH_444_GUID;
 563         break;
 564     case NV_ENC_H264_PROFILE_CONSTRAINED_HIGH:
 565         cc->profileGUID = NV_ENC_H264_PROFILE_CONSTRAINED_HIGH_GUID;
 566         break;
 567     }
 568
 569     h264->level = ctx->level;
 570
 571     return 0;
 572 }
 573
 574 static int nvenc_setup_hevc_config(AVCodecContext *avctx)
 575 {
 576     NVENCContext *ctx                      = avctx->priv_data;
 577     NV_ENC_CONFIG *cc                      = &ctx->config;
 578     NV_ENC_CONFIG_HEVC *hevc               = &cc->encodeCodecConfig.hevcConfig;
 579
 580     hevc->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
 581     hevc->repeatSPSPPS  = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;
 582
 583     hevc->maxNumRefFramesInDPB = avctx->refs;
 584     hevc->idrPeriod            = cc->gopLength;
 585
 586     /* No other profile is supported in the current SDK version 5 */
 587     cc->profileGUID = NV_ENC_HEVC_PROFILE_MAIN_GUID;
 588     avctx->profile  = FF_PROFILE_HEVC_MAIN;
 589
 590     if (ctx->level) {
 591         hevc->level = ctx->level;
 592     } else {
 593         hevc->level = NV_ENC_LEVEL_AUTOSELECT;
 594     }
 595
 596     if (ctx->tier) {
 597         hevc->tier = ctx->tier;
 598     }
 599
 600     return 0;
 601 }
 602 static int nvenc_setup_codec_config(AVCodecContext *avctx)
 603 {
 604     switch (avctx->codec->id) {
 605     case AV_CODEC_ID_H264:
 606         return nvenc_setup_h264_config(avctx);
 607     case AV_CODEC_ID_HEVC:
 608         return nvenc_setup_hevc_config(avctx);
 609     }
 610     return 0;
 611 }
 612
 613 static int nvenc_setup_encoder(AVCodecContext *avctx)
 614 {
 615     NVENCContext *ctx               = avctx->priv_data;
 616     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
 617     NV_ENC_PRESET_CONFIG preset_cfg = { 0 };
 618     AVCPBProperties *cpb_props;
 619     int ret;
 620
 621     ctx->params.version = NV_ENC_INITIALIZE_PARAMS_VER;
 622
 623     ctx->params.encodeHeight = avctx->height;
 624     ctx->params.encodeWidth  = avctx->width;
 625
 626     if (avctx->sample_aspect_ratio.num &&
 627         avctx->sample_aspect_ratio.den &&
 628         (avctx->sample_aspect_ratio.num != 1 ||
 629          avctx->sample_aspect_ratio.den != 1)) {
 630         av_reduce(&ctx->params.darWidth,
 631                   &ctx->params.darHeight,
 632                   avctx->width * avctx->sample_aspect_ratio.num,
 633                   avctx->height * avctx->sample_aspect_ratio.den,
 634                   INT_MAX / 8);
 635     } else {
 636         ctx->params.darHeight = avctx->height;
 637         ctx->params.darWidth  = avctx->width;
 638     }
 639
 640     ctx->params.frameRateNum = avctx->time_base.den;
 641     ctx->params.frameRateDen = avctx->time_base.num * avctx->ticks_per_frame;
 642
 643     ctx->params.enableEncodeAsync = 0;
 644     ctx->params.enablePTD         = 1;
 645
 646     ctx->params.encodeConfig = &ctx->config;
 647
 648     nvec_map_preset(ctx);
 649
 650     preset_cfg.version           = NV_ENC_PRESET_CONFIG_VER;
 651     preset_cfg.presetCfg.version = NV_ENC_CONFIG_VER;
 652
 653     ret = nv->nvEncGetEncodePresetConfig(ctx->nvenc_ctx,
 654                                          ctx->params.encodeGUID,
 655                                          ctx->params.presetGUID,
 656                                          &preset_cfg);
 657     if (ret != NV_ENC_SUCCESS)
 658         return nvenc_print_error(avctx, ret, "Cannot get the preset configuration");
 659
 660     memcpy(&ctx->config, &preset_cfg.presetCfg, sizeof(ctx->config));
 661
 662     ctx->config.version = NV_ENC_CONFIG_VER;
 663
 664     if (avctx->gop_size > 0) {
 665         if (avctx->max_b_frames > 0) {
 666             ctx->last_dts = -2;
 667             /* 0 is intra-only,
 668              * 1 is I/P only,
 669              * 2 is one B Frame,
 670              * 3 two B frames, and so on. */
 671             ctx->config.frameIntervalP = avctx->max_b_frames + 1;
 672         } else if (avctx->max_b_frames == 0) {
 673             ctx->config.frameIntervalP = 1;
 674         }
 675         ctx->config.gopLength = avctx->gop_size;
 676     } else if (avctx->gop_size == 0) {
 677         ctx->config.frameIntervalP = 0;
 678         ctx->config.gopLength      = 1;
 679     }
 680
 681     if (ctx->config.frameIntervalP > 1)
 682         avctx->max_b_frames = ctx->config.frameIntervalP - 1;
 683
 684     nvenc_setup_rate_control(avctx);
 685
 686     if (avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {
 687         ctx->config.frameFieldMode = NV_ENC_PARAMS_FRAME_FIELD_MODE_FIELD;
 688     } else {
 689         ctx->config.frameFieldMode = NV_ENC_PARAMS_FRAME_FIELD_MODE_FRAME;
 690     }
 691
 692     if ((ret = nvenc_setup_codec_config(avctx)) < 0)
 693         return ret;
 694
 695     ret = nv->nvEncInitializeEncoder(ctx->nvenc_ctx, &ctx->params);
 696     if (ret != NV_ENC_SUCCESS)
 697         return nvenc_print_error(avctx, ret, "Cannot initialize the decoder");
 698
 699     cpb_props = ff_add_cpb_side_data(avctx);
 700     if (!cpb_props)
 701         return AVERROR(ENOMEM);
 702     cpb_props->max_bitrate = avctx->rc_max_rate;
 703     cpb_props->min_bitrate = avctx->rc_min_rate;
 704     cpb_props->avg_bitrate = avctx->bit_rate;
 705     cpb_props->buffer_size = avctx->rc_buffer_size;
 706
 707     return 0;
 708 }
 709
 710 static int nvenc_alloc_surface(AVCodecContext *avctx, int idx)
 711 {
 712     NVENCContext *ctx               = avctx->priv_data;
 713     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
 714     int ret;
 715     NV_ENC_CREATE_INPUT_BUFFER in_buffer      = { 0 };
 716     NV_ENC_CREATE_BITSTREAM_BUFFER out_buffer = { 0 };
 717
 718     in_buffer.version  = NV_ENC_CREATE_INPUT_BUFFER_VER;
 719     out_buffer.version = NV_ENC_CREATE_BITSTREAM_BUFFER_VER;
 720
 721     in_buffer.width  = avctx->width;
 722     in_buffer.height = avctx->height;
 723
 724     in_buffer.memoryHeap = NV_ENC_MEMORY_HEAP_SYSMEM_UNCACHED;
 725
 726     switch (avctx->pix_fmt) {
 727     case AV_PIX_FMT_YUV420P:
 728         in_buffer.bufferFmt = NV_ENC_BUFFER_FORMAT_YV12_PL;
 729         break;
 730     case AV_PIX_FMT_NV12:
 731         in_buffer.bufferFmt = NV_ENC_BUFFER_FORMAT_NV12_PL;
 732         break;
 733     case AV_PIX_FMT_YUV444P:
 734         in_buffer.bufferFmt = NV_ENC_BUFFER_FORMAT_YUV444_PL;
 735         break;
 736     default:
 737         return AVERROR_BUG;
 738     }
 739
 740     ret = nv->nvEncCreateInputBuffer(ctx->nvenc_ctx, &in_buffer);
 741     if (ret != NV_ENC_SUCCESS)
 742         return nvenc_print_error(avctx, ret, "CreateInputBuffer failed");
 743
 744     ctx->in[idx].in        = in_buffer.inputBuffer;
 745     ctx->in[idx].format    = in_buffer.bufferFmt;
 746
 747     /* 1MB is large enough to hold most output frames.
 748      * NVENC increases this automaticaly if it's not enough. */
 749     out_buffer.size = BITSTREAM_BUFFER_SIZE;
 750
 751     out_buffer.memoryHeap = NV_ENC_MEMORY_HEAP_SYSMEM_UNCACHED;
 752
 753     ret = nv->nvEncCreateBitstreamBuffer(ctx->nvenc_ctx, &out_buffer);
 754     if (ret != NV_ENC_SUCCESS)
 755         return nvenc_print_error(avctx, ret, "CreateBitstreamBuffer failed");
 756
 757     ctx->out[idx].out  = out_buffer.bitstreamBuffer;
 758     ctx->out[idx].busy = 0;
 759
 760     return 0;
 761 }
 762
 763 static int nvenc_setup_surfaces(AVCodecContext *avctx)
 764 {
 765     NVENCContext *ctx = avctx->priv_data;
 766     int i, ret;
 767
 768     ctx->nb_surfaces = FFMAX(4 + avctx->max_b_frames,
 769                              ctx->nb_surfaces);
 770
 771     ctx->in = av_mallocz(ctx->nb_surfaces * sizeof(*ctx->in));
 772     if (!ctx->in)
 773         return AVERROR(ENOMEM);
 774
 775     ctx->out = av_mallocz(ctx->nb_surfaces * sizeof(*ctx->out));
 776     if (!ctx->out)
 777         return AVERROR(ENOMEM);
 778
 779     ctx->timestamps = av_fifo_alloc(ctx->nb_surfaces * sizeof(int64_t));
 780     if (!ctx->timestamps)
 781         return AVERROR(ENOMEM);
 782     ctx->pending = av_fifo_alloc(ctx->nb_surfaces * sizeof(ctx->out));
 783     if (!ctx->pending)
 784         return AVERROR(ENOMEM);
 785     ctx->ready = av_fifo_alloc(ctx->nb_surfaces * sizeof(ctx->out));
 786     if (!ctx->ready)
 787         return AVERROR(ENOMEM);
 788
 789     for (i = 0; i < ctx->nb_surfaces; i++) {
 790         if ((ret = nvenc_alloc_surface(avctx, i)) < 0)
 791             return ret;
 792     }
 793
 794     return 0;
 795 }
 796
 797 #define EXTRADATA_SIZE 512
 798
 799 static int nvenc_setup_extradata(AVCodecContext *avctx)
 800 {
 801     NVENCContext *ctx                     = avctx->priv_data;
 802     NV_ENCODE_API_FUNCTION_LIST *nv       = &ctx->nvel.nvenc_funcs;
 803     NV_ENC_SEQUENCE_PARAM_PAYLOAD payload = { 0 };
 804     int ret;
 805
 806     avctx->extradata = av_mallocz(EXTRADATA_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
 807     if (!avctx->extradata)
 808         return AVERROR(ENOMEM);
 809
 810     payload.version              = NV_ENC_SEQUENCE_PARAM_PAYLOAD_VER;
 811     payload.spsppsBuffer         = avctx->extradata;
 812     payload.inBufferSize         = EXTRADATA_SIZE;
 813     payload.outSPSPPSPayloadSize = &avctx->extradata_size;
 814
 815     ret = nv->nvEncGetSequenceParams(ctx->nvenc_ctx, &payload);
 816     if (ret != NV_ENC_SUCCESS)
 817         return nvenc_print_error(avctx, ret, "Cannot get the extradata");
 818
 819     return 0;
 820 }
 821
 822 av_cold int ff_nvenc_encode_close(AVCodecContext *avctx)
 823 {
 824     NVENCContext *ctx               = avctx->priv_data;
 825     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
 826     int i;
 827
 828     av_fifo_free(ctx->timestamps);
 829     av_fifo_free(ctx->pending);
 830     av_fifo_free(ctx->ready);
 831
 832     if (ctx->in) {
 833         for (i = 0; i < ctx->nb_surfaces; ++i) {
 834             nv->nvEncDestroyInputBuffer(ctx->nvenc_ctx, ctx->in[i].in);
 835             nv->nvEncDestroyBitstreamBuffer(ctx->nvenc_ctx, ctx->out[i].out);
 836         }
 837     }
 838
 839     av_freep(&ctx->in);
 840     av_freep(&ctx->out);
 841
 842     if (ctx->nvenc_ctx)
 843         nv->nvEncDestroyEncoder(ctx->nvenc_ctx);
 844
 845     if (ctx->cu_context)
 846         ctx->nvel.cu_ctx_destroy(ctx->cu_context);
 847
 848     if (ctx->nvel.nvenc)
 849         dlclose(ctx->nvel.nvenc);
 850
 851     if (ctx->nvel.cuda)
 852         dlclose(ctx->nvel.cuda);
 853
 854     return 0;
 855 }
 856
 857 av_cold int ff_nvenc_encode_init(AVCodecContext *avctx)
 858 {
 859     int ret;
 860
 861     if ((ret = nvenc_load_libraries(avctx)) < 0)
 862         return ret;
 863
 864     if ((ret = nvenc_setup_device(avctx)) < 0)
 865         return ret;
 866
 867     if ((ret = nvenc_setup_encoder(avctx)) < 0)
 868         return ret;
 869
 870     if ((ret = nvenc_setup_surfaces(avctx)) < 0)
 871         return ret;
 872
 873     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
 874         if ((ret = nvenc_setup_extradata(avctx)) < 0)
 875             return ret;
 876     }
 877
 878     return 0;
 879 }
 880
 881 static NVENCInputSurface *get_input_surface(NVENCContext *ctx)
 882 {
 883     int i;
 884
 885     for (i = 0; i < ctx->nb_surfaces; i++) {
 886         if (!ctx->in[i].locked) {
 887             ctx->in[i].locked = 1;
 888             return &ctx->in[i];
 889         }
 890     }
 891
 892     return NULL;
 893 }
 894
 895 static NVENCOutputSurface *get_output_surface(NVENCContext *ctx)
 896 {
 897     int i;
 898
 899     for (i = 0; i < ctx->nb_surfaces; i++) {
 900         if (!ctx->out[i].busy) {
 901             return &ctx->out[i];
 902         }
 903     }
 904
 905     return NULL;
 906 }
 907
 908 static int nvenc_copy_frame(NV_ENC_LOCK_INPUT_BUFFER *in, const AVFrame *frame)
 909 {
 910     uint8_t *buf = in->bufferDataPtr;
 911     int off      = frame->height * in->pitch;
 912
 913     switch (frame->format) {
 914     case AV_PIX_FMT_YUV420P:
 915         av_image_copy_plane(buf, in->pitch,
 916                             frame->data[0], frame->linesize[0],
 917                             frame->width, frame->height);
 918         buf += off;
 919
 920         av_image_copy_plane(buf, in->pitch >> 1,
 921                             frame->data[2], frame->linesize[2],
 922                             frame->width >> 1, frame->height >> 1);
 923
 924         buf += off >> 2;
 925
 926         av_image_copy_plane(buf, in->pitch >> 1,
 927                             frame->data[1], frame->linesize[1],
 928                             frame->width >> 1, frame->height >> 1);
 929         break;
 930     case AV_PIX_FMT_NV12:
 931         av_image_copy_plane(buf, in->pitch,
 932                             frame->data[0], frame->linesize[0],
 933                             frame->width, frame->height);
 934         buf += off;
 935
 936         av_image_copy_plane(buf, in->pitch,
 937                             frame->data[1], frame->linesize[1],
 938                             frame->width, frame->height >> 1);
 939         break;
 940     case AV_PIX_FMT_YUV444P:
 941         av_image_copy_plane(buf, in->pitch,
 942                             frame->data[0], frame->linesize[0],
 943                             frame->width, frame->height);
 944         buf += off;
 945
 946         av_image_copy_plane(buf, in->pitch,
 947                             frame->data[1], frame->linesize[1],
 948                             frame->width, frame->height);
 949         buf += off;
 950
 951         av_image_copy_plane(buf, in->pitch,
 952                             frame->data[2], frame->linesize[2],
 953                             frame->width, frame->height);
 954         break;
 955     default:
 956         return AVERROR_BUG;
 957     }
 958
 959     return 0;
 960 }
 961
 962 static int nvenc_enqueue_frame(AVCodecContext *avctx, const AVFrame *frame,
 963                                NVENCInputSurface **in_surf)
 964 {
 965     NVENCContext *ctx               = avctx->priv_data;
 966     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
 967     NV_ENC_LOCK_INPUT_BUFFER params = { 0 };
 968     NVENCInputSurface *in           = get_input_surface(ctx);
 969     int ret;
 970
 971     if (!in)
 972         return AVERROR_BUG;
 973
 974     params.version     = NV_ENC_LOCK_INPUT_BUFFER_VER;
 975     params.inputBuffer = in->in;
 976
 977
 978     ret = nv->nvEncLockInputBuffer(ctx->nvenc_ctx, &params);
 979     if (ret != NV_ENC_SUCCESS)
 980         return nvenc_print_error(avctx, ret, "Cannot lock the buffer");
 981
 982     ret = nvenc_copy_frame(&params, frame);
 983     if (ret < 0)
 984         goto fail;
 985
 986     ret = nv->nvEncUnlockInputBuffer(ctx->nvenc_ctx, in->in);
 987     if (ret != NV_ENC_SUCCESS)
 988         return nvenc_print_error(avctx, ret, "Cannot unlock the buffer");
 989
 990     *in_surf = in;
 991
 992     return 0;
 993
 994 fail:
 995     nv->nvEncUnlockInputBuffer(ctx->nvenc_ctx, in->in);
 996
 997     return ret;
 998 }
 999
1000 static void nvenc_codec_specific_pic_params(AVCodecContext *avctx,
1001                                             NV_ENC_PIC_PARAMS *params)
1002 {
1003     NVENCContext *ctx = avctx->priv_data;
1004
1005     switch (avctx->codec->id) {
1006     case AV_CODEC_ID_H264:
1007         params->codecPicParams.h264PicParams.sliceMode =
1008             ctx->config.encodeCodecConfig.h264Config.sliceMode;
1009         params->codecPicParams.h264PicParams.sliceModeData =
1010             ctx->config.encodeCodecConfig.h264Config.sliceModeData;
1011         break;
1012     case AV_CODEC_ID_HEVC:
1013         params->codecPicParams.hevcPicParams.sliceMode =
1014             ctx->config.encodeCodecConfig.hevcConfig.sliceMode;
1015         params->codecPicParams.hevcPicParams.sliceModeData =
1016             ctx->config.encodeCodecConfig.hevcConfig.sliceModeData;
1017         break;
1018     }
1019 }
1020
1021 static inline int nvenc_enqueue_timestamp(AVFifoBuffer *f, int64_t pts)
1022 {
1023     return av_fifo_generic_write(f, &pts, sizeof(pts), NULL);
1024 }
1025
1026 static inline int nvenc_dequeue_timestamp(AVFifoBuffer *f, int64_t *pts)
1027 {
1028     return av_fifo_generic_read(f, pts, sizeof(*pts), NULL);
1029 }
1030
1031 static inline int nvenc_enqueue_surface(AVFifoBuffer *f,
1032                                         NVENCOutputSurface *surf)
1033 {
1034     surf->busy = 1;
1035     return av_fifo_generic_write(f, &surf, sizeof(surf), NULL);
1036 }
1037
1038 static inline int nvenc_dequeue_surface(AVFifoBuffer *f,
1039                                         NVENCOutputSurface **surf)
1040 {
1041     return av_fifo_generic_read(f, surf, sizeof(*surf), NULL);
1042 }
1043
1044 static int nvenc_set_timestamp(NVENCContext *ctx,
1045                                NV_ENC_LOCK_BITSTREAM *params,
1046                                AVPacket *pkt)
1047 {
1048     pkt->pts      = params->outputTimeStamp;
1049     pkt->duration = params->outputDuration;
1050
1051     return nvenc_dequeue_timestamp(ctx->timestamps, &pkt->dts);
1052 }
1053
1054 static int nvenc_get_frame(AVCodecContext *avctx, AVPacket *pkt)
1055 {
1056     NVENCContext *ctx               = avctx->priv_data;
1057     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
1058     NV_ENC_LOCK_BITSTREAM params    = { 0 };
1059     NVENCOutputSurface *out         = NULL;
1060     int ret;
1061
1062     ret = nvenc_dequeue_surface(ctx->pending, &out);
1063     if (ret)
1064         return ret;
1065
1066     params.version         = NV_ENC_LOCK_BITSTREAM_VER;
1067     params.outputBitstream = out->out;
1068
1069     ret = nv->nvEncLockBitstream(ctx->nvenc_ctx, &params);
1070     if (ret < 0)
1071         return nvenc_print_error(avctx, ret, "Cannot lock the bitstream");
1072
1073     ret = ff_alloc_packet(pkt, params.bitstreamSizeInBytes);
1074     if (ret < 0)
1075         return ret;
1076
1077     memcpy(pkt->data, params.bitstreamBufferPtr, pkt->size);
1078
1079     ret = nv->nvEncUnlockBitstream(ctx->nvenc_ctx, out->out);
1080     if (ret < 0)
1081         return nvenc_print_error(avctx, ret, "Cannot unlock the bitstream");
1082
1083     out->busy = out->in->locked = 0;
1084
1085     ret = nvenc_set_timestamp(ctx, &params, pkt);
1086     if (ret < 0)
1087         return ret;
1088
1089     switch (params.pictureType) {
1090     case NV_ENC_PIC_TYPE_IDR:
1091         pkt->flags |= AV_PKT_FLAG_KEY;
1092 #if FF_API_CODED_FRAME
1093 FF_DISABLE_DEPRECATION_WARNINGS
1094     case NV_ENC_PIC_TYPE_INTRA_REFRESH:
1095     case NV_ENC_PIC_TYPE_I:
1096         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
1097         break;
1098     case NV_ENC_PIC_TYPE_P:
1099         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
1100         break;
1101     case NV_ENC_PIC_TYPE_B:
1102         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;
1103         break;
1104     case NV_ENC_PIC_TYPE_BI:
1105         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_BI;
1106         break;
1107 FF_ENABLE_DEPRECATION_WARNINGS
1108 #endif
1109     }
1110
1111     return 0;
1112 }
1113
1114 int ff_nvenc_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1115                           const AVFrame *frame, int *got_packet)
1116 {
1117     NVENCContext *ctx               = avctx->priv_data;
1118     NV_ENCODE_API_FUNCTION_LIST *nv = &ctx->nvel.nvenc_funcs;
1119     NV_ENC_PIC_PARAMS params        = { 0 };
1120     NVENCInputSurface *in           = NULL;
1121     NVENCOutputSurface *out         = NULL;
1122     int ret;
1123
1124     params.version = NV_ENC_PIC_PARAMS_VER;
1125
1126     if (frame) {
1127         ret = nvenc_enqueue_frame(avctx, frame, &in);
1128         if (ret < 0)
1129             return ret;
1130         out = get_output_surface(ctx);
1131         if (!out)
1132             return AVERROR_BUG;
1133
1134         out->in = in;
1135
1136         params.inputBuffer     = in->in;
1137         params.bufferFmt       = in->format;
1138         params.inputWidth      = frame->width;
1139         params.inputHeight     = frame->height;
1140         params.outputBitstream = out->out;
1141         params.inputTimeStamp  = frame->pts;
1142
1143         if (avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {
1144             if (frame->top_field_first)
1145                 params.pictureStruct = NV_ENC_PIC_STRUCT_FIELD_TOP_BOTTOM;
1146             else
1147                 params.pictureStruct = NV_ENC_PIC_STRUCT_FIELD_BOTTOM_TOP;
1148         } else {
1149             params.pictureStruct = NV_ENC_PIC_STRUCT_FRAME;
1150         }
1151
1152         nvenc_codec_specific_pic_params(avctx, &params);
1153
1154         ret = nvenc_enqueue_timestamp(ctx->timestamps, frame->pts);
1155         if (ret < 0)
1156             return ret;
1157     } else {
1158         params.encodePicFlags = NV_ENC_PIC_FLAG_EOS;
1159     }
1160
1161     ret = nv->nvEncEncodePicture(ctx->nvenc_ctx, &params);
1162     if (ret != NV_ENC_SUCCESS &&
1163         ret != NV_ENC_ERR_NEED_MORE_INPUT)
1164         return nvenc_print_error(avctx, ret, "Error encoding the frame");
1165
1166     if (out) {
1167         ret = nvenc_enqueue_surface(ctx->pending, out);
1168         if (ret < 0)
1169             return ret;
1170     }
1171
1172     if (ret != NV_ENC_ERR_NEED_MORE_INPUT &&
1173         av_fifo_size(ctx->pending)) {
1174         ret = nvenc_get_frame(avctx, pkt);
1175         if (ret < 0)
1176             return ret;
1177         *got_packet = 1;
1178     } else {
1179         *got_packet = 0;
1180     }
1181
1182     return 0;
1183 }