Some missing parts

include/grpc/impl/codegen/compression_types.h

@@ -50,6 +50,10 @@ extern "C" {
 /** Default compression level for the channel.
  * Its value is an int from the \a grpc_compression_level enum. */
 #define GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL "grpc.default_compression_level"
+/** Default stream compression level for the channel.
+ * Its value is an int from the \a grpc_stream_compression_level enum. */
+#define GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_LEVEL \
+  "grpc.default_stream_compression_level"
 /** Compression algorithms supported by the channel.
  * Its value is a bitset (an int). Bits correspond to algorithms in \a
  * grpc_compression_algorithm. For example, its LSB corresponds to

src/core/ext/filters/http/message_compress/message_compress_filter.c

@@ -488,7 +488,7 @@ static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx,
                                      grpc_channel_element_args *args) {
   channel_data *channeld = elem->channel_data;
 
-  /* Configuration for message-wise compression */
+  /* Configuration for message compression */
   channeld->enabled_algorithms_bitset =
       grpc_channel_args_compression_algorithm_get_states(args->channel_args);
 

src/core/lib/surface/channel.c

@@ -141,6 +141,16 @@ grpc_channel *grpc_channel_create_with_builder(
               (grpc_integer_options){GRPC_COMPRESS_LEVEL_NONE,
                                      GRPC_COMPRESS_LEVEL_NONE,
                                      GRPC_COMPRESS_LEVEL_COUNT - 1});
+    } else if (0 == strcmp(args->args[i].key,
+                           GRPC_STREAM_COMPRESSION_CHANNEL_DEFAULT_LEVEL)) {
+      channel->compression_options.default_stream_compression_level.is_set =
+          true;
+      channel->compression_options.default_stream_compression_level.level =
+          (grpc_compression_level)grpc_channel_arg_get_integer(
+              &args->args[i],
+              (grpc_integer_options){GRPC_COMPRESS_LEVEL_NONE,
+                                     GRPC_COMPRESS_LEVEL_NONE,
+                                     GRPC_COMPRESS_LEVEL_COUNT - 1});
     } else if (0 == strcmp(args->args[i].key,
                            GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM)) {
       channel->compression_options.default_algorithm.is_set = true;