[FFmpeg-devel] [PATCH] lavc/vaapi_encode_h265: add support for low-power encoding

[Haihao Xiang]

Although VAEntrypointEncSliceLP was added in old version of VAAPI, we
never implemented it for VAAPI H265 encoder before. so it is reasonable
to require VAAPI 1.0

Signed-off-by: Haihao Xiang <haihao.xiang at intel.com>
---
 libavcodec/vaapi_encode_h265.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index f3b4f6c7e26..efe1148127f 100644
--- a/libavcodec/vaapi_encode_h265.c
+++ b/libavcodec/vaapi_encode_h265.c
@@ -65,6 +65,7 @@ typedef struct VAAPIEncodeH265Options {
     int aud;
     int profile;
     int level;
+    int low_power;
 } VAAPIEncodeH265Options;
 
 
@@ -914,7 +915,18 @@ static av_cold int vaapi_encode_h265_init(AVCodecContext *avctx)
                avctx->profile);
         return AVERROR(EINVAL);
     }
-    ctx->va_entrypoint = VAEntrypointEncSlice;
+
+    if (opt->low_power) {
+#if VA_CHECK_VERSION(1, 0, 0)
+        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;
+    }
 
     if (avctx->bit_rate > 0) {
         if (avctx->rc_max_rate == avctx->bit_rate)
@@ -986,6 +998,10 @@ static const AVOption vaapi_encode_h265_options[] = {
     { LEVEL("6.2", 186) },
 #undef LEVEL
 
+    { "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 },
 };
 
-- 
2.14.1