From 7b0b6a2c414a7e8947d37c817d5b312a7ec844f7 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Wed, 13 Jun 2012 11:59:12 -0700
Subject: [PATCH] disable lagged encoding in one-pass

This currently has no effect and can create an artificial lag in e.g.,
realtime.

Change-Id: Ia1c7c6dbe7c6fe82a944f087f1b0d1dbbc0aa1b6
---
 test/config_test.cc | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 test/test.mk        |  1 +
 vp8/vp8_cx_iface.c  |  2 +-
 3 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 test/config_test.cc

diff --git a/test/config_test.cc b/test/config_test.cc
new file mode 100644
index 0000000..e595786
--- /dev/null
+++ b/test/config_test.cc
@@ -0,0 +1,61 @@
+/*
+ *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include "third_party/googletest/src/include/gtest/gtest.h"
+#include "test/encode_test_driver.h"
+#include "test/video_source.h"
+
+namespace {
+
+class ConfigTest : public ::libvpx_test::EncoderTest,
+    public ::testing::TestWithParam<enum libvpx_test::TestMode> {
+ public:
+  ConfigTest() : frame_count_in_(0), frame_count_out_(0), frame_count_max_(0) {}
+
+ protected:
+  virtual void SetUp() {
+    InitializeConfig();
+    SetMode(GetParam());
+  }
+
+  virtual void BeginPassHook(unsigned int /*pass*/) {
+    frame_count_in_ = 0;
+    frame_count_out_ = 0;
+  }
+
+  virtual void PreEncodeFrameHook(libvpx_test::VideoSource* /*video*/) {
+    ++frame_count_in_;
+    abort_ |= (frame_count_in_ >= frame_count_max_);
+  }
+
+  virtual void FramePktHook(const vpx_codec_cx_pkt_t* /*pkt*/) {
+    ++frame_count_out_;
+  }
+
+  virtual bool Continue() {
+    return !HasFatalFailure() && !abort_;
+  }
+
+  unsigned int frame_count_in_;
+  unsigned int frame_count_out_;
+  unsigned int frame_count_max_;
+};
+
+TEST_P(ConfigTest, LagIsDisabled) {
+  frame_count_max_ = 2;
+  cfg_.g_lag_in_frames = 15;
+
+  libvpx_test::DummyVideoSource video;
+  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+
+  EXPECT_EQ(frame_count_in_, frame_count_out_);
+}
+
+INSTANTIATE_TEST_CASE_P(OnePassModes, ConfigTest, ONE_PASS_TEST_MODES);
+}  // namespace
diff --git a/test/test.mk b/test/test.mk
index ac500fe..d58beb4 100644
--- a/test/test.mk
+++ b/test/test.mk
@@ -1,5 +1,6 @@
 LIBVPX_TEST_SRCS-yes += test.mk
 LIBVPX_TEST_SRCS-yes += boolcoder_test.cc
+LIBVPX_TEST_SRCS-yes += config_test.cc
 LIBVPX_TEST_SRCS-yes += encode_test_driver.cc
 LIBVPX_TEST_SRCS-yes += encode_test_driver.h
 LIBVPX_TEST_SRCS-yes += idctllm_test.cc
diff --git a/vp8/vp8_cx_iface.c b/vp8/vp8_cx_iface.c
index 9671107..fed96b2 100644
--- a/vp8/vp8_cx_iface.c
+++ b/vp8/vp8_cx_iface.c
@@ -299,7 +299,7 @@ static vpx_codec_err_t set_vp8e_config(VP8_CONFIG *oxcf,
         break;
     }
 
-    if (cfg.g_pass == VPX_RC_FIRST_PASS)
+    if (cfg.g_pass == VPX_RC_FIRST_PASS || cfg.g_pass == VPX_RC_ONE_PASS)
     {
         oxcf->allow_lag     = 0;
         oxcf->lag_in_frames = 0;
-- 
2.7.4