Add the decoder param large_win.

src/tests/params.vtc

@@ -3,7 +3,7 @@
 varnishtest "test various custom parameter settings"
 
 server s1 {
-	loop 3 {
+	loop 4 {
 		rxreq
 		txresp -body {Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure.}
 	}
@@ -81,6 +81,23 @@ varnish v1 -errvcl {vfp brotli failure: new err: quality 12 out of range (0 to 1
 	}
 }
 
+# Large window
+
+varnish v1 -vcl+backend {
+	import ${vmod_brotli};
+
+	sub vcl_init {
+		new mybr = brotli.decoder("unbr_largewin", large_win=true);
+	}
+
+	sub vcl_backend_response {
+		set beresp.filters = "br unbr_largewin";
+		set beresp.uncacheable = true;
+	}
+}
+
+client c1 -run
+
 logexpect l1 -v v1 -d 1 -g vxid -q "VfpAcct" {
 	expect 0 * Begin	bereq
 	expect * = VfpAcct	{^unbr \d+ 269$}
@@ -96,4 +113,9 @@ logexpect l1 -v v1 -d 1 -g vxid -q "VfpAcct" {
 	expect * = VfpAcct	{^unbr \d+ 269$}
 	expect * = VfpAcct	{^br_q11 \d+ \d+$}
 	expect * = End
+
+	expect 0 * Begin	bereq
+	expect * = VfpAcct	{^unbr_largewin \d+ 269$}
+	expect * = VfpAcct	{^br \d+ \d+$}
+	expect * = End
 } -run

src/vfp_brotli.c

@@ -78,6 +78,7 @@ struct vbr_settings {
 #define VBR_SETTINGS_MAGIC 0xa61992aa
 	VCL_BYTES	bufsz;
 	uint32_t	quality;
+	uint32_t	large_win;
 	enum vbr_which	which;
 };
 
@@ -153,8 +154,10 @@ setEncoderParams(struct vbr *vbr, const struct vbr_settings *settings)
 static void
 setDecoderParams(struct vbr *vbr, const struct vbr_settings *settings)
 {
-	(void) vbr;
-	(void) settings;
+	CHECK_OBJ_NOTNULL(settings, VBR_SETTINGS_MAGIC);
+	assert(BrotliDecoderSetParameter(vbr->state.dec,
+					 BROTLI_DECODER_PARAM_LARGE_WINDOW,
+					 settings->large_win) == BROTLI_TRUE);
 }
 
 static inline void
@@ -675,7 +678,7 @@ vmod_encoder__fini(struct vmod_brotli_encoder **encp)
 VCL_VOID
 vmod_decoder__init(VRT_CTX, struct vmod_brotli_decoder **decp,
 		   const char *vcl_name, struct vmod_priv *priv,
-		   VCL_STRING filter_name, VCL_BYTES bufsz)
+		   VCL_STRING filter_name, VCL_BYTES bufsz, VCL_BOOL large_win)
 {
 	struct vmod_brotli_decoder *dec;
 	struct vfp *vfp = NULL;
@@ -701,6 +704,7 @@ vmod_decoder__init(VRT_CTX, struct vmod_brotli_decoder **decp,
 	vfp->pull = vfp_unbr_pull;
 	VRT_AddVFP(ctx, vfp);
 	settings->which = DEC;
+	settings->large_win = large_win;
 	dec->vfp = vfp;
 }
 

src/vfp_brotli.vcc

@@ -70,7 +70,7 @@ $Object encoder(PRIV_VCL, STRING name, BYTES bufffer=32768, INT quality=11)
 
 XXX ...
 
-$Object decoder(PRIV_VCL, STRING name, BYTES buffer=32768)
+$Object decoder(PRIV_VCL, STRING name, BYTES buffer=32768, BOOL large_win=0)
 
 XXX ...