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lavc/vaapi_encode_h265: Add GPB frame support for hevc_vaapi

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Use GPB frames to replace regular P/B frames if backend driver does not
support it.

- GPB:
    Generalized P and B picture. Regular P/B frames replaced by B
    frames with previous-predict only, L0 == L1. Normal B frames
    still have 2 different ref_lists and allow bi-prediction

Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Signed-off-by: Fei Wang <fei.w.wang@intel.com>
This commit is contained in:
Linjie Fu 2022-03-17 14:41:49 +08:00 • committed by Haihao Xiang
parent 6e45acd23b
commit a285968a0b
3 changed files with 78 additions and 5 deletions
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67
libavcodec/vaapi_encode.c
View file

@ -1875,6 +1875,7 @@ static av_cold int vaapi_encode_init_gop_structure(AVCodecContext *avctx)
VAStatus vas;
VAConfigAttrib attr = { VAConfigAttribEncMaxRefFrames };
uint32_t ref_l0, ref_l1;
int prediction_pre_only;
vas = vaGetConfigAttributes(ctx->hwctx->display,
ctx->va_profile,
@ -1893,6 +1894,51 @@ static av_cold int vaapi_encode_init_gop_structure(AVCodecContext *avctx)
ref_l1 = attr.value >> 16 & 0xffff;
}
ctx->p_to_gpb = 0;
prediction_pre_only = 0;
#if VA_CHECK_VERSION(1, 9, 0)
if (!(ctx->codec->flags & FLAG_INTRA_ONLY ||
avctx->gop_size <= 1)) {
attr = (VAConfigAttrib) { VAConfigAttribPredictionDirection };
vas = vaGetConfigAttributes(ctx->hwctx->display,
ctx->va_profile,
ctx->va_entrypoint,
&attr, 1);
if (vas != VA_STATUS_SUCCESS) {
av_log(avctx, AV_LOG_WARNING, "Failed to query prediction direction "
"attribute: %d (%s).\n", vas, vaErrorStr(vas));
return AVERROR_EXTERNAL;
} else if (attr.value == VA_ATTRIB_NOT_SUPPORTED) {
av_log(avctx, AV_LOG_VERBOSE, "Driver does not report any additional "
"prediction constraints.\n");
} else {
if (((ref_l0 > 0 || ref_l1 > 0) && !(attr.value & VA_PREDICTION_DIRECTION_PREVIOUS)) ||
((ref_l1 == 0) && (attr.value & (VA_PREDICTION_DIRECTION_FUTURE | VA_PREDICTION_DIRECTION_BI_NOT_EMPTY)))) {
av_log(avctx, AV_LOG_ERROR, "Driver report incorrect prediction "
"direction attribute.\n");
return AVERROR_EXTERNAL;
}
if (!(attr.value & VA_PREDICTION_DIRECTION_FUTURE)) {
if (ref_l0 > 0 && ref_l1 > 0) {
prediction_pre_only = 1;
av_log(avctx, AV_LOG_VERBOSE, "Driver only support same reference "
"lists for B-frames.\n");
}
}
if (attr.value & VA_PREDICTION_DIRECTION_BI_NOT_EMPTY) {
if (ref_l0 > 0 && ref_l1 > 0) {
ctx->p_to_gpb = 1;
av_log(avctx, AV_LOG_VERBOSE, "Driver does not support P-frames, "
"replacing them with B-frames.\n");
}
}
}
}
#endif
if (ctx->codec->flags & FLAG_INTRA_ONLY ||
avctx->gop_size <= 1) {
av_log(avctx, AV_LOG_VERBOSE, "Using intra frames only.\n");
@ -1902,15 +1948,26 @@ static av_cold int vaapi_encode_init_gop_structure(AVCodecContext *avctx)
"reference frames.\n");
return AVERROR(EINVAL);
} else if (!(ctx->codec->flags & FLAG_B_PICTURES) ||
ref_l1 < 1 || avctx->max_b_frames < 1) {
av_log(avctx, AV_LOG_VERBOSE, "Using intra and P-frames "
"(supported references: %d / %d).\n", ref_l0, ref_l1);
ref_l1 < 1 || avctx->max_b_frames < 1 ||
prediction_pre_only) {
if (ctx->p_to_gpb)
av_log(avctx, AV_LOG_VERBOSE, "Using intra and B-frames "
"(supported references: %d / %d).\n",
ref_l0, ref_l1);
else
av_log(avctx, AV_LOG_VERBOSE, "Using intra and P-frames "
"(supported references: %d / %d).\n", ref_l0, ref_l1);
ctx->gop_size = avctx->gop_size;
ctx->p_per_i = INT_MAX;
ctx->b_per_p = 0;
} else {
av_log(avctx, AV_LOG_VERBOSE, "Using intra, P- and B-frames "
"(supported references: %d / %d).\n", ref_l0, ref_l1);
if (ctx->p_to_gpb)
av_log(avctx, AV_LOG_VERBOSE, "Using intra and B-frames "
"(supported references: %d / %d).\n",
ref_l0, ref_l1);
else
av_log(avctx, AV_LOG_VERBOSE, "Using intra, P- and B-frames "
"(supported references: %d / %d).\n", ref_l0, ref_l1);
ctx->gop_size = avctx->gop_size;
ctx->p_per_i = INT_MAX;
ctx->b_per_p = avctx->max_b_frames;