[FFmpeg-devel] [PATCH v2 1/4] lavc/vaapi_encode: add EQUAL_MULTI_ROWS support for slice structure

[Linjie Fu]

VA_ENC_SLICE_STRUCTURE_EQUAL_MULTI_ROWS is added to in the latest
libva (1.8.0) which matches the hardware behaviour:

/** \brief Driver supports any number of rows per slice but they must be the same
*       for all slices except for the last one, which must be equal or smaller
*       to the previous slices. */

And VA_ENC_SLICE_STRUCTURE_EQUAL_ROWS is kind of deprecated for iHD
since it's somehow introduced in [1] however misleading from what we
actually handle, and one row per slice would not get a good quality.

Caps query support in driver is WIP, and this would fix the multi slice
encoding for VAEntrypointEncSliceLP.

[1]<https://github.com/intel/libva/commit/0e6d5441f19bdc674b4da3169d614d10fd644778>

Signed-off-by: Linjie Fu <linjie.fu at intel.com>
---
 libavcodec/vaapi_encode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/vaapi_encode.c b/libavcodec/vaapi_encode.c
index cb05ebd..234618a 100644
--- a/libavcodec/vaapi_encode.c
+++ b/libavcodec/vaapi_encode.c
@@ -1888,6 +1888,9 @@ static av_cold int vaapi_encode_init_slice_structure(AVCodecContext *avctx)
         req_slices = avctx->slices;
     }
     if (slice_structure & VA_ENC_SLICE_STRUCTURE_ARBITRARY_ROWS ||
+#if VA_CHECK_VERSION(1, 8, 0)
+        slice_structure & VA_ENC_SLICE_STRUCTURE_EQUAL_MULTI_ROWS ||
+#endif
         slice_structure & VA_ENC_SLICE_STRUCTURE_ARBITRARY_MACROBLOCKS) {
         ctx->nb_slices  = req_slices;
         ctx->slice_size = ctx->slice_block_rows / ctx->nb_slices;
-- 
2.7.4