Quoting Mark Thompson (2017-04-30 20:43:34)
> Use AVCodecContext.compression_level rather than a private option,
> replacing the H.264-specific quality option (which stays only for
> compatibility).
>
> This now works with the H.265 encoder in the i965 driver, as well as
> the existing cases with the H.264 encoder.
> ---
> doc/encoders.texi | 9 ++++++---
> libavcodec/vaapi_encode.c | 33 +++++++++++++++++++++++++++++++++
> libavcodec/vaapi_encode.h | 6 ++++++
> libavcodec/vaapi_encode_h264.c | 25 ++-----------------------
> 4 files changed, 47 insertions(+), 26 deletions(-)
>
> diff --git a/doc/encoders.texi b/doc/encoders.texi
> index 7cebe39c1..c369e03bf 100644
> --- a/doc/encoders.texi
> +++ b/doc/encoders.texi
> @@ -948,7 +948,13 @@ The following standard libavcodec options are used:
> @item
> @option{rc_init_occupancy} / @option{rc_initial_buffer_occupancy}
> @item
> +@option{compression_level}
> +
> +Speed / quality tradeoff: higher values are faster / worse quality.
> +@item
> @option{q} / @option{global_quality}
> +
> +Size / quality tradeoff: higher values are smaller / worse quality.
> @item
> @option{qmin}
> (only: @option{qmax} is not supported)
> @@ -969,9 +975,6 @@ The following standard libavcodec options are used:
> @option{level} sets the value of @emph{level_idc}.
>
> @table @option
> -@item quality
> -Set the local encoding quality/speed tradeoff (range 1-8, higher values are
> faster; not all
> -systems implement all levels).
> @item low_power
> Use low-power encoding mode.
> @end table
> diff --git a/libavcodec/vaapi_encode.c b/libavcodec/vaapi_encode.c
> index 620518419..5e5177a5d 100644
> --- a/libavcodec/vaapi_encode.c
> +++ b/libavcodec/vaapi_encode.c
> @@ -1423,6 +1423,39 @@ av_cold int ff_vaapi_encode_init(AVCodecContext *avctx)
> goto fail;
> }
>
> + if (avctx->compression_level >= 0) {
> +#if VA_CHECK_VERSION(0, 36, 0)
> + VAConfigAttrib attr = { VAConfigAttribEncQualityRange };
> +
> + 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 quality "
> + "attribute: will use default compression level.\n");
> + } else if (avctx->compression_level > attr.value) {
> + av_log(avctx, AV_LOG_ERROR, "Invalid compression level: "
> + "valid range is 0-%d.\n", attr.value);
> + err = AVERROR(EINVAL);
It looks a bit strange to me that this branch fails, while the case
where vaapi doesn't support this option continues.
Otherwise looks fine.
--
Anton Khirnov
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