Output frames in first pass for VPX_DL_REALTIME.

Since combining VPX_DL_REALTIME with VPX_RC_FIRST_PASS is basically
nonsense, ignore the user's pass setting when this happens and
behave as if the requested encode is a single pass encode.

BUG=webm:1233

Change-Id: I5ee4c4e5838c4ca6d24988890aae490b10826db2

test/realtime_test.cc

@@ -0,0 +1,76 @@
+/*
+ *  Copyright (c) 2016 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 "test/codec_factory.h"
+#include "test/encode_test_driver.h"
+#include "test/util.h"
+#include "test/video_source.h"
+#include "third_party/googletest/src/include/gtest/gtest.h"
+
+namespace {
+
+const int kVideoSourceWidth = 320;
+const int kVideoSourceHeight = 240;
+const int kFramesToEncode = 2;
+
+class RealtimeTest
+    : public ::libvpx_test::EncoderTest,
+      public ::libvpx_test::CodecTestWithParam<libvpx_test::TestMode> {
+ protected:
+  RealtimeTest()
+      : EncoderTest(GET_PARAM(0)), num_decoded_(0), frame_packets_(0) {}
+  virtual ~RealtimeTest() {}
+
+  virtual void SetUp() {
+    InitializeConfig();
+    cfg_.g_lag_in_frames = 0;
+    SetMode(::libvpx_test::kRealTime);
+  }
+
+  virtual void BeginPassHook(unsigned int /*pass*/) {
+    // TODO(tomfinegan): We're changing the pass value here to make sure
+    // we get frames when real time mode is combined with |g_pass| set to
+    // VPX_RC_FIRST_PASS. This is necessary because EncoderTest::RunLoop() sets
+    // the pass value based on the mode passed into EncoderTest::SetMode(),
+    // which overrides the one specified in SetUp() above.
+    cfg_.g_pass = VPX_RC_FIRST_PASS;
+  }
+  virtual void FramePktHook(const vpx_codec_cx_pkt_t * /*pkt*/) {
+    frame_packets_++;
+  }
+  virtual void DecompressedFrameHook(const vpx_image_t & /*img*/,
+                                     vpx_codec_pts_t /*pts*/) {
+    num_decoded_++;
+  }
+  virtual bool HandleDecodeResult(const vpx_codec_err_t res_dec,
+                                  const libvpx_test::VideoSource & /*video*/,
+                                  libvpx_test::Decoder *decoder) {
+    EXPECT_EQ(VPX_CODEC_OK, res_dec) << decoder->DecodeError();
+    return !::testing::Test::HasFailure();
+  }
+
+  int num_decoded_;
+  int frame_packets_;
+};
+
+TEST_P(RealtimeTest, RealtimeFirstPassProducesFrames) {
+  ::libvpx_test::RandomVideoSource video;
+  video.SetSize(kVideoSourceWidth, kVideoSourceHeight);
+  video.set_limit(kFramesToEncode);
+  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+  EXPECT_EQ(kFramesToEncode, num_decoded_);
+  EXPECT_EQ(kFramesToEncode, frame_packets_);
+}
+
+VP8_INSTANTIATE_TEST_CASE(RealtimeTest,
+                          ::testing::Values(::libvpx_test::kRealTime));
+VP9_INSTANTIATE_TEST_CASE(RealtimeTest,
+                          ::testing::Values(::libvpx_test::kRealTime));
+
+}  // namespace

test/test.mk

@@ -24,6 +24,7 @@ LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += datarate_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += encode_api_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += error_resilience_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += i420_video_source.h
+LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += realtime_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += resize_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += y4m_video_source.h
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += yuv_video_source.h

vp8/vp8_cx_iface.c

@@ -786,7 +786,9 @@ static void pick_quickcompress_mode(vpx_codec_alg_priv_t  *ctx,
     new_qc = MODE_REALTIME;
 #endif
 
-    if (ctx->cfg.g_pass == VPX_RC_FIRST_PASS)
+    if (deadline == VPX_DL_REALTIME)
+        new_qc = MODE_REALTIME;
+    else if (ctx->cfg.g_pass == VPX_RC_FIRST_PASS)
         new_qc = MODE_FIRSTPASS;
     else if (ctx->cfg.g_pass == VPX_RC_LAST_PASS)
         new_qc = (new_qc == MODE_BESTQUALITY)

vp9/vp9_cx_iface.c

@@ -905,6 +905,11 @@ static void pick_quickcompress_mode(vpx_codec_alg_priv_t *ctx,
       break;
   }
 
+  if (deadline == VPX_DL_REALTIME) {
+    ctx->oxcf.pass = 0;
+    new_mode = REALTIME;
+  }
+
   if (ctx->oxcf.mode != new_mode) {
     ctx->oxcf.mode = new_mode;
     vp9_change_config(ctx->cpi, &ctx->oxcf);