Always compile VP9 source files.

Instead of optionally compile VP9 source files based on the value of
the GN argument 'rtc_libvpx_build_vp9', this CL uses the preprocessor
macro RTC_ENABLE_VP9 to decide if VP9 related code needs to be compiled
or not.

Bug: None
Change-Id: I5c1b69d7ec35e8446181d98c912277d0ae8fdba2
Reviewed-on: https://webrtc-review.googlesource.com/c/111063
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25685}

modules/video_coding/BUILD.gn

@@ -501,19 +501,14 @@ rtc_static_library("webrtc_vp9_helpers") {
 rtc_static_library("webrtc_vp9") {
   visibility = [ "*" ]
   poisonous = [ "software_video_codecs" ]
-  if (rtc_libvpx_build_vp9) {
-    sources = [
-      "codecs/vp9/include/vp9.h",
-      "codecs/vp9/vp9_frame_buffer_pool.cc",
-      "codecs/vp9/vp9_frame_buffer_pool.h",
-      "codecs/vp9/vp9_impl.cc",
-      "codecs/vp9/vp9_impl.h",
-    ]
-  } else {
-    sources = [
-      "codecs/vp9/vp9_noop.cc",
-    ]
-  }
+  sources = [
+    "codecs/vp9/include/vp9.h",
+    "codecs/vp9/vp9.cc",
+    "codecs/vp9/vp9_frame_buffer_pool.cc",
+    "codecs/vp9/vp9_frame_buffer_pool.h",
+    "codecs/vp9/vp9_impl.cc",
+    "codecs/vp9/vp9_impl.h",
+  ]
 
   if (!build_with_chromium && is_clang) {
     # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).

modules/video_coding/codecs/vp9/vp9.cc

@@ -1,43 +1,60 @@
 /*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *  Copyright (c) 2018 The WebRTC 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.
- *
  */
 
-#if defined(RTC_ENABLE_VP9)
-#error
-#endif  // defined(RTC_ENABLE_VP9)
-
 #include "modules/video_coding/codecs/vp9/include/vp9.h"
 
+#include "absl/memory/memory.h"
 #include "api/video_codecs/sdp_video_format.h"
+#include "modules/video_coding/codecs/vp9/vp9_impl.h"
 #include "rtc_base/checks.h"
 
 namespace webrtc {
 
 std::vector<SdpVideoFormat> SupportedVP9Codecs() {
+#ifdef RTC_ENABLE_VP9
+  // TODO(emircan): Add Profile 2 support after fixing browser_tests.
+  std::vector<SdpVideoFormat> supported_formats{SdpVideoFormat(
+      cricket::kVp9CodecName,
+      {{kVP9FmtpProfileId, VP9ProfileToString(VP9Profile::kProfile0)}})};
+  return supported_formats;
+#else
   return std::vector<SdpVideoFormat>();
+#endif
 }
 
 std::unique_ptr<VP9Encoder> VP9Encoder::Create() {
+#ifdef RTC_ENABLE_VP9
+  return absl::make_unique<VP9EncoderImpl>(cricket::VideoCodec());
+#else
   RTC_NOTREACHED();
   return nullptr;
+#endif
 }
 
 std::unique_ptr<VP9Encoder> VP9Encoder::Create(
     const cricket::VideoCodec& codec) {
+#ifdef RTC_ENABLE_VP9
+  return absl::make_unique<VP9EncoderImpl>(codec);
+#else
   RTC_NOTREACHED();
   return nullptr;
+#endif
 }
 
 std::unique_ptr<VP9Decoder> VP9Decoder::Create() {
+#ifdef RTC_ENABLE_VP9
+  return absl::make_unique<VP9DecoderImpl>();
+#else
   RTC_NOTREACHED();
   return nullptr;
+#endif
 }
 
 }  // namespace webrtc

modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc

@@ -9,6 +9,8 @@
  *
  */
 
+#ifdef RTC_ENABLE_VP9
+
 #include "modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.h"
 
 #include "vpx/vpx_codec.h"
@@ -138,3 +140,5 @@ int32_t Vp9FrameBufferPool::VpxReleaseFrameBuffer(void* user_priv,
 }
 
 }  // namespace webrtc
+
+#endif  // RTC_ENABLE_VP9

modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.h

@@ -12,6 +12,8 @@
 #ifndef MODULES_VIDEO_CODING_CODECS_VP9_VP9_FRAME_BUFFER_POOL_H_
 #define MODULES_VIDEO_CODING_CODECS_VP9_VP9_FRAME_BUFFER_POOL_H_
 
+#ifdef RTC_ENABLE_VP9
+
 #include <vector>
 
 #include "rtc_base/buffer.h"
@@ -120,4 +122,6 @@ class Vp9FrameBufferPool {
 
 }  // namespace webrtc
 
+#endif  // RTC_ENABLE_VP9
+
 #endif  // MODULES_VIDEO_CODING_CODECS_VP9_VP9_FRAME_BUFFER_POOL_H_

modules/video_coding/codecs/vp9/vp9_impl.cc

@@ -9,6 +9,8 @@
  *
  */
 
+#ifdef RTC_ENABLE_VP9
+
 #include "modules/video_coding/codecs/vp9/vp9_impl.h"
 
 #include <algorithm>
@@ -124,23 +126,6 @@ ColorSpace ExtractVP9ColorSpace(vpx_color_space_t space_t,
 }
 }  // namespace
 
-std::vector<SdpVideoFormat> SupportedVP9Codecs() {
-  // TODO(emircan): Add Profile 2 support after fixing browser_tests.
-  std::vector<SdpVideoFormat> supported_formats{SdpVideoFormat(
-      cricket::kVp9CodecName,
-      {{kVP9FmtpProfileId, VP9ProfileToString(VP9Profile::kProfile0)}})};
-  return supported_formats;
-}
-
-std::unique_ptr<VP9Encoder> VP9Encoder::Create() {
-  return absl::make_unique<VP9EncoderImpl>(cricket::VideoCodec());
-}
-
-std::unique_ptr<VP9Encoder> VP9Encoder::Create(
-    const cricket::VideoCodec& codec) {
-  return absl::make_unique<VP9EncoderImpl>(codec);
-}
-
 void VP9EncoderImpl::EncoderOutputCodedPacketCallback(vpx_codec_cx_pkt* pkt,
                                                       void* user_data) {
   VP9EncoderImpl* enc = static_cast<VP9EncoderImpl*>(user_data);
@@ -1260,10 +1245,6 @@ VideoEncoder::EncoderInfo VP9EncoderImpl::GetEncoderInfo() const {
   return info;
 }
 
-std::unique_ptr<VP9Decoder> VP9Decoder::Create() {
-  return absl::make_unique<VP9DecoderImpl>();
-}
-
 VP9DecoderImpl::VP9DecoderImpl()
     : decode_complete_callback_(nullptr),
       inited_(false),
@@ -1458,3 +1439,5 @@ const char* VP9DecoderImpl::ImplementationName() const {
 }
 
 }  // namespace webrtc
+
+#endif  // RTC_ENABLE_VP9

modules/video_coding/codecs/vp9/vp9_impl.h

@@ -12,6 +12,8 @@
 #ifndef MODULES_VIDEO_CODING_CODECS_VP9_VP9_IMPL_H_
 #define MODULES_VIDEO_CODING_CODECS_VP9_VP9_IMPL_H_
 
+#ifdef RTC_ENABLE_VP9
+
 #include <map>
 #include <memory>
 #include <vector>
@@ -179,4 +181,6 @@ class VP9DecoderImpl : public VP9Decoder {
 };
 }  // namespace webrtc
 
+#endif  // RTC_ENABLE_VP9
+
 #endif  // MODULES_VIDEO_CODING_CODECS_VP9_VP9_IMPL_H_