libavcodec/nvenc.h

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef AVCODEC_NVENC_H
  20 #define AVCODEC_NVENC_H
  21
  22 #include <cuda.h>
  23 #include <nvEncodeAPI.h>
  24
  25 #include "libavutil/fifo.h"
  26 #include "libavutil/opt.h"
  27
  28 #include "avcodec.h"
  29
  30 typedef struct NVENCInputSurface {
  31     NV_ENC_INPUT_PTR in;
  32     NV_ENC_BUFFER_FORMAT format;
  33     int locked;
  34 } NVENCInputSurface;
  35
  36 typedef struct NVENCOutputSurface {
  37     NV_ENC_OUTPUT_PTR out;
  38     NVENCInputSurface *in;
  39     int busy;
  40 } NVENCOutputSurface;
  41
  42 typedef CUresult(CUDAAPI *PCUINIT)(unsigned int Flags);
  43 typedef CUresult(CUDAAPI *PCUDEVICEGETCOUNT)(int *count);
  44 typedef CUresult(CUDAAPI *PCUDEVICEGET)(CUdevice *device, int ordinal);
  45 typedef CUresult(CUDAAPI *PCUDEVICEGETNAME)(char *name, int len, CUdevice dev);
  46 typedef CUresult(CUDAAPI *PCUDEVICECOMPUTECAPABILITY)(int *major, int *minor, CUdevice dev);
  47 typedef CUresult(CUDAAPI *PCUCTXCREATE)(CUcontext *pctx, unsigned int flags, CUdevice dev);
  48 typedef CUresult(CUDAAPI *PCUCTXPOPCURRENT)(CUcontext *pctx);
  49 typedef CUresult(CUDAAPI *PCUCTXDESTROY)(CUcontext ctx);
  50
  51 typedef NVENCSTATUS (NVENCAPI *PNVENCODEAPICREATEINSTANCE)(NV_ENCODE_API_FUNCTION_LIST *functionList);
  52
  53 typedef struct NVENCLibraryContext
  54 {
  55     void *cuda;
  56     void *nvenc;
  57
  58     PCUINIT cu_init;
  59     PCUDEVICEGETCOUNT cu_device_get_count;
  60     PCUDEVICEGET cu_device_get;
  61     PCUDEVICEGETNAME cu_device_get_name;
  62     PCUDEVICECOMPUTECAPABILITY cu_device_compute_capability;
  63     PCUCTXCREATE cu_ctx_create;
  64     PCUCTXPOPCURRENT cu_ctx_pop_current;
  65     PCUCTXDESTROY cu_ctx_destroy;
  66
  67     NV_ENCODE_API_FUNCTION_LIST nvenc_funcs;
  68 } NVENCLibraryContext;
  69
  70 enum {
  71     PRESET_DEFAULT,
  72     PRESET_HP,
  73     PRESET_HQ,
  74     PRESET_BD ,
  75     PRESET_LOW_LATENCY_DEFAULT ,
  76     PRESET_LOW_LATENCY_HQ ,
  77     PRESET_LOW_LATENCY_HP,
  78     PRESET_LOSSLESS_DEFAULT,
  79     PRESET_LOSSLESS_HP,
  80 };
  81
  82 enum {
  83     NV_ENC_H264_PROFILE_BASELINE,
  84     NV_ENC_H264_PROFILE_MAIN,
  85     NV_ENC_H264_PROFILE_HIGH,
  86     NV_ENC_H264_PROFILE_HIGH_444,
  87     NV_ENC_H264_PROFILE_CONSTRAINED_HIGH,
  88 };
  89
  90 enum {
  91     NVENC_LOWLATENCY = 1,
  92     NVENC_LOSSLESS,
  93 };
  94
  95 enum {
  96     LIST_DEVICES = -2,
  97     ANY_DEVICE,
  98 };
  99
 100 typedef struct NVENCContext {
 101     AVClass *class;
 102     NVENCLibraryContext nvel;
 103
 104     NV_ENC_INITIALIZE_PARAMS params;
 105     NV_ENC_CONFIG config;
 106
 107     CUcontext cu_context;
 108
 109     int nb_surfaces;
 110     NVENCInputSurface *in;
 111     NVENCOutputSurface *out;
 112     AVFifoBuffer *timestamps;
 113     AVFifoBuffer *pending, *ready;
 114
 115     int64_t last_dts;
 116
 117     void *nvenc_ctx;
 118
 119     int preset;
 120     int profile;
 121     int level;
 122     int tier;
 123     int rc;
 124     int device;
 125     int flags;
 126 } NVENCContext;
 127
 128 int ff_nvenc_encode_init(AVCodecContext *avctx);
 129
 130 int ff_nvenc_encode_close(AVCodecContext *avctx);
 131
 132 int ff_nvenc_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 133                           const AVFrame *frame, int *got_packet);
 134
 135 #endif /* AVCODEC_NVENC_H */