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vaapi_h264: Add trivial support for low-power encoding 

Experimental; requires Skylake and VAAPI 0.39.1 (not yet released).
Also increases the allowed range of the quality option - in low-power
mode, the Intel driver supports levels 1-8 (and 0 meaning default).
This commit is contained in:
Mark Thompson 2016-05-17 23:08:57 +01:00
parent b51c7c6b8a
commit a86aa16088
1 changed files with 16 additions and 2 deletions
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18
libavcodec/vaapi_encode_h264.c
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@ -126,6 +126,7 @@ typedef struct VAAPIEncodeH264Context {
typedef struct VAAPIEncodeH264Options {
int qp;
int quality;
int low_power;
} VAAPIEncodeH264Options;
@ -854,7 +855,17 @@ static av_cold int vaapi_encode_h264_init_internal(AVCodecContext *avctx)
avctx->profile);
return AVERROR(EINVAL);
}
ctx->va_entrypoint = VAEntrypointEncSlice;
if (opt->low_power) {
#if VA_CHECK_VERSION(0, 39, 1)
ctx->va_entrypoint = VAEntrypointEncSliceLP;
#else
av_log(avctx, AV_LOG_ERROR, "Low-power encoding is not "
"supported with this VAAPI version.\n");
return AVERROR(EINVAL);
#endif
} else {
ctx->va_entrypoint = VAEntrypointEncSlice;
}
ctx->input_width = avctx->width;
ctx->input_height = avctx->height;
@ -937,7 +948,10 @@ static const AVOption vaapi_encode_h264_options[] = {
{ "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
{ "quality", "Set encode quality (trades off against speed, higher is faster)",
OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, FLAGS },
OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8, FLAGS },
{ "low_power", "Use low-power encoding mode (experimental: only supported "
"on some platforms, does not support all features)",
OFFSET(low_power), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
{ NULL },
};