Export symbols needed by the Chromium component build (part 4).

This CL uses RTC_EXPORT (defined in rtc_base/system/rtc_export.h)
to mark WebRTC symbols as visible from a shared library, this doesn't
mean these symbols are part of the public API (please continue to refer
to [1] for info about what is considered public WebRTC API).

[1] - https://webrtc.googlesource.com/src/+/HEAD/native-api.md

Bug: webrtc:9419
Change-Id: I12ef6f85ccef7dae3afe9ecff99725af13d551e2
Reviewed-on: https://webrtc-review.googlesource.com/c/106684
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25246}

media/base/codec.h

@@ -20,6 +20,7 @@
 #include "api/video_codecs/sdp_video_format.h"
 #include "common_types.h"  // NOLINT(build/include)
 #include "media/base/mediaconstants.h"
+#include "rtc_base/system/rtc_export.h"
 
 namespace cricket {
 
@@ -62,7 +63,7 @@ class FeedbackParams {
   std::vector<FeedbackParam> params_;
 };
 
-struct Codec {
+struct RTC_EXPORT Codec {
   int id;
   std::string name;
   int clockrate;
@@ -142,7 +143,7 @@ struct AudioCodec : public Codec {
   bool operator!=(const AudioCodec& c) const { return !(*this == c); }
 };
 
-struct VideoCodec : public Codec {
+struct RTC_EXPORT VideoCodec : public Codec {
   // Creates a codec with the given parameters.
   VideoCodec(int id, const std::string& name);
   // Creates a codec with the given name and empty id.
@@ -215,8 +216,9 @@ const Codec* FindCodecById(const std::vector<Codec>& codecs, int payload_type) {
   return nullptr;
 }
 
-bool CodecNamesEq(const std::string& name1, const std::string& name2);
-bool CodecNamesEq(const char* name1, const char* name2);
+RTC_EXPORT bool CodecNamesEq(const std::string& name1,
+                             const std::string& name2);
+RTC_EXPORT bool CodecNamesEq(const char* name1, const char* name2);
 bool HasNack(const Codec& codec);
 bool HasRemb(const Codec& codec);
 bool HasRrtr(const Codec& codec);

media/base/h264_profile_level_id.h

@@ -62,7 +62,7 @@ absl::optional<ProfileLevelId> ParseProfileLevelId(const char* str);
 // contained in an SDP key-value map. A default profile level id will be
 // returned if the profile-level-id key is missing. Nothing will be returned if
 // the key is present but the string is invalid.
-absl::optional<ProfileLevelId> ParseSdpProfileLevelId(
+RTC_EXPORT absl::optional<ProfileLevelId> ParseSdpProfileLevelId(
     const CodecParameterMap& params);
 
 // Given that a decoder supports up to a given frame size (in pixels) at up to a
@@ -74,7 +74,7 @@ RTC_EXPORT absl::optional<Level> SupportedLevel(int max_frame_pixel_count,
 
 // Returns canonical string representation as three hex bytes of the profile
 // level id, or returns nothing for invalid profile level ids.
-absl::optional<std::string> ProfileLevelIdToString(
+RTC_EXPORT absl::optional<std::string> ProfileLevelIdToString(
     const ProfileLevelId& profile_level_id);
 
 // Generate codec parameters that will be used as answer in an SDP negotiation

media/base/mediaconstants.h

@@ -13,6 +13,8 @@
 
 #include <string>
 
+#include "rtc_base/system/rtc_export.h"
+
 // This file contains constants related to media.
 
 namespace cricket {
@@ -127,12 +129,12 @@ extern const char kComfortNoiseCodecName[];
 
 extern const char kVp8CodecName[];
 extern const char kVp9CodecName[];
-extern const char kH264CodecName[];
+RTC_EXPORT extern const char kH264CodecName[];
 
 // RFC 6184 RTP Payload Format for H.264 video
-extern const char kH264FmtpProfileLevelId[];
-extern const char kH264FmtpLevelAsymmetryAllowed[];
-extern const char kH264FmtpPacketizationMode[];
+RTC_EXPORT extern const char kH264FmtpProfileLevelId[];
+RTC_EXPORT extern const char kH264FmtpLevelAsymmetryAllowed[];
+RTC_EXPORT extern const char kH264FmtpPacketizationMode[];
 extern const char kH264FmtpSpropParameterSets[];
 extern const char kH264ProfileLevelConstrainedBaseline[];
 

media/base/videocapturer.h

@@ -26,6 +26,7 @@
 #include "media/base/videocommon.h"
 #include "rtc_base/constructormagic.h"
 #include "rtc_base/criticalsection.h"
+#include "rtc_base/system/rtc_export.h"
 #include "rtc_base/third_party/sigslot/sigslot.h"
 #include "rtc_base/thread_checker.h"
 #include "rtc_base/timestampaligner.h"
@@ -72,7 +73,8 @@ enum CaptureState {
 //   media engine thread). Hence, the VideoCapture subclasses dont need to be
 //   thread safe.
 //
-class VideoCapturer : public sigslot::has_slots<>,
+class RTC_EXPORT VideoCapturer
+    : public sigslot::has_slots<>,
       public rtc::VideoSourceInterface<webrtc::VideoFrame> {
  public:
   VideoCapturer();

media/engine/webrtcvideoencoderfactory.h

@@ -16,6 +16,7 @@
 
 #include "common_types.h"  // NOLINT(build/include)
 #include "media/base/codec.h"
+#include "rtc_base/system/rtc_export.h"
 
 namespace webrtc {
 class VideoEncoder;
@@ -25,7 +26,7 @@ namespace cricket {
 
 // Deprecated. Use webrtc::VideoEncoderFactory instead.
 // https://bugs.chromium.org/p/webrtc/issues/detail?id=7925
-class WebRtcVideoEncoderFactory {
+class RTC_EXPORT WebRtcVideoEncoderFactory {
  public:
   virtual ~WebRtcVideoEncoderFactory() {}
 

p2p/BUILD.gn

@@ -211,6 +211,7 @@ rtc_static_library("libstunprober") {
     "..:webrtc_common",
     "../rtc_base:checks",
     "../rtc_base:rtc_base",
+    "../rtc_base/system:rtc_export",
   ]
 }
 

p2p/stunprober/stunprober.h

@@ -22,6 +22,7 @@
 #include "rtc_base/ipaddress.h"
 #include "rtc_base/network.h"
 #include "rtc_base/socketaddress.h"
+#include "rtc_base/system/rtc_export.h"
 #include "rtc_base/thread.h"
 #include "rtc_base/thread_checker.h"
 
@@ -49,7 +50,7 @@ enum NatType {
   NATTYPE_NON_SYMMETRIC  // Behind a non-symmetric NAT.
 };
 
-class StunProber : public sigslot::has_slots<> {
+class RTC_EXPORT StunProber : public sigslot::has_slots<> {
  public:
   enum Status {       // Used in UMA_HISTOGRAM_ENUMERATION.
     SUCCESS,          // Successfully received bytes from the server.