avcodec/libx265: apply lavc maxrate, bufsize & rc_init_occupancy

CLI options -maxrate, -bufsize and -rc_init_occupancy can now be picked
up by the x265 wrapper.  Min. rc init has to be 1001 to avoid x265
setting it to vbv-bufsize.

libavcodec/libx265.c

@@ -205,6 +205,9 @@ static av_cold int libx265_encode_init(AVCodecContext *avctx)
         ctx->params->rc.rateControlMode = X265_RC_ABR;
     }
 
+    ctx->params->rc.vbvBufferSize = avctx->rc_buffer_size / 1000;
+    ctx->params->rc.vbvMaxBitrate = avctx->rc_max_rate    / 1000;
+
     if (!(avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
         ctx->params->bRepeatHeaders = 1;
 
@@ -233,6 +236,11 @@ static av_cold int libx265_encode_init(AVCodecContext *avctx)
         }
     }
 
+    if (ctx->params->rc.vbvBufferSize && avctx->rc_initial_buffer_occupancy > 1000 &&
+        ctx->params->rc.vbvBufferInit == 0.9) {
+        ctx->params->rc.vbvBufferInit = (float)avctx->rc_initial_buffer_occupancy / 1000;
+    }
+
     if (ctx->profile) {
         if (ctx->api->param_apply_profile(ctx->params, ctx->profile) < 0) {
             int i;

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  58
 #define LIBAVCODEC_VERSION_MINOR  20
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MICRO 103
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \