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Code Issues Releases Activity

avcodec/nvenc: add support for B frames as ref

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This commit is contained in:
Timo Rothenpieler 2018-04-11 14:22:20 +02:00
parent 3e9d676192
commit 86e9dba8fa
3 changed files with 38 additions and 0 deletions
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20
libavcodec/nvenc.c
View File

@ -370,6 +370,22 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
return AVERROR(ENOSYS);
}
#ifdef NVENC_HAVE_BFRAME_REF_MODE
ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_BFRAME_REF_MODE);
if (ctx->b_ref_mode == NV_ENC_BFRAME_REF_MODE_EACH && ret != 1) {
av_log(avctx, AV_LOG_VERBOSE, "Each B frame as reference is not supported\n");
return AVERROR(ENOSYS);
} else if (ctx->b_ref_mode != NV_ENC_BFRAME_REF_MODE_DISABLED && ret == 0) {
av_log(avctx, AV_LOG_VERBOSE, "B frames as references are not supported\n");
return AVERROR(ENOSYS);
}
#else
if (ctx->b_ref_mode != 0) {
av_log(avctx, AV_LOG_VERBOSE, "B frames as references need SDK 8.1 at build time\n");
return AVERROR(ENOSYS);
}
#endif
return 0;
}
@ -988,6 +1004,10 @@ static av_cold int nvenc_setup_h264_config(AVCodecContext *avctx)
if (ctx->coder >= 0)
h264->entropyCodingMode = ctx->coder;
#ifdef NVENC_HAVE_BFRAME_REF_MODE
h264->useBFramesAsRef = ctx->b_ref_mode;
#endif
return 0;
}

7
libavcodec/nvenc.h
View File

@ -40,6 +40,12 @@ typedef void ID3D11Device;
#define RC_MODE_DEPRECATED 0x800000
#define RCD(rc_mode) ((rc_mode) | RC_MODE_DEPRECATED)
// SDK 8.1 compile time feature checks
#if NVENCAPI_VERSION >= 0x01000008
#define NVENC_HAVE_BFRAME_REF_MODE
#define NVENC_HAVE_QP_MAP_MODE
#endif
typedef struct NvencSurface
{
NV_ENC_INPUT_PTR input_surface;
@ -174,6 +180,7 @@ typedef struct NvencContext
int cqp;
int weighted_pred;
int coder;
int b_ref_mode;
} NvencContext;
int ff_nvenc_encode_init(AVCodecContext *avctx);

11
libavcodec/nvenc_h264.c
View File

@ -126,6 +126,17 @@ static const AVOption options[] = {
{ "cavlc", "", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CAVLC }, 0, 0, VE, "coder" },
{ "ac", "", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CABAC }, 0, 0, VE, "coder" },
{ "vlc", "", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CAVLC }, 0, 0, VE, "coder" },
#ifdef NVENC_HAVE_BFRAME_REF_MODE
{ "b_ref_mode", "Use B frames as references", OFFSET(b_ref_mode), AV_OPT_TYPE_INT, { .i64 = NV_ENC_BFRAME_REF_MODE_DISABLED }, NV_ENC_BFRAME_REF_MODE_DISABLED, NV_ENC_BFRAME_REF_MODE_MIDDLE, VE, "b_ref_mode" },
{ "disabled", "B frames will not be used for reference", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_BFRAME_REF_MODE_DISABLED }, 0, 0, VE, "b_ref_mode" },
{ "each", "Each B frame will be used for reference", 0, AV_OPT_TYPE_CONST, { .i64 = NV_ENC_BFRAME_REF_MODE_EACH }, 0, 0, VE, "b_ref_mode" },
{ "middle", "Only (number of B frames)/2 will be used for reference", 0,AV_OPT_TYPE_CONST, { .i64 = NV_ENC_BFRAME_REF_MODE_MIDDLE }, 0, 0, VE, "b_ref_mode" },
#else
{ "b_ref_mode", "(not supported)", OFFSET(b_ref_mode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE, "b_ref_mode" },
{ "disabled", "", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, VE, "b_ref_mode" },
{ "each", "", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, VE, "b_ref_mode" },
{ "middle", "", 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, VE, "b_ref_mode" },
#endif
{ NULL }
};