Move talk/media to webrtc/media

talk/media/base/codec.h

-/*
- * libjingle
- * Copyright 2004 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef TALK_MEDIA_BASE_CODEC_H_
-#define TALK_MEDIA_BASE_CODEC_H_
-
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "talk/media/base/constants.h"
-
-namespace cricket {
-
-typedef std::map<std::string, std::string> CodecParameterMap;
-
-extern const int kMaxPayloadId;
-
-class FeedbackParam {
- public:
-  FeedbackParam(const std::string& id, const std::string& param)
-      : id_(id),
-        param_(param) {
-  }
-  explicit FeedbackParam(const std::string& id)
-      : id_(id),
-        param_(kParamValueEmpty) {
-  }
-  bool operator==(const FeedbackParam& other) const;
-
-  const std::string& id() const { return id_; }
-  const std::string& param() const { return param_; }
-
- private:
-  std::string id_;  // e.g. "nack", "ccm"
-  std::string param_;  // e.g. "", "rpsi", "fir"
-};
-
-class FeedbackParams {
- public:
-  bool operator==(const FeedbackParams& other) const;
-
-  bool Has(const FeedbackParam& param) const;
-  void Add(const FeedbackParam& param);
-
-  void Intersect(const FeedbackParams& from);
-
-  const std::vector<FeedbackParam>& params() const { return params_; }
- private:
-  bool HasDuplicateEntries() const;
-
-  std::vector<FeedbackParam> params_;
-};
-
-struct Codec {
-  int id;
-  std::string name;
-  int clockrate;
-  int preference;
-  CodecParameterMap params;
-  FeedbackParams feedback_params;
-
-  // Creates a codec with the given parameters.
-  Codec(int id, const std::string& name, int clockrate, int preference);
-  // Creates an empty codec.
-  Codec();
-  Codec(const Codec& c);
-  ~Codec();
-
-  // Indicates if this codec is compatible with the specified codec.
-  bool Matches(const Codec& codec) const;
-
-  // Find the parameter for |name| and write the value to |out|.
-  bool GetParam(const std::string& name, std::string* out) const;
-  bool GetParam(const std::string& name, int* out) const;
-
-  void SetParam(const std::string& name, const std::string& value);
-  void SetParam(const std::string& name, int value);
-
-  // It is safe to input a non-existent parameter.
-  // Returns true if the parameter existed, false if it did not exist.
-  bool RemoveParam(const std::string& name);
-
-  bool HasFeedbackParam(const FeedbackParam& param) const;
-  void AddFeedbackParam(const FeedbackParam& param);
-
-  static bool Preferable(const Codec& first, const Codec& other) {
-    return first.preference > other.preference;
-  }
-
-  // Filter |this| feedbacks params such that only those shared by both |this|
-  // and |other| are kept.
-  void IntersectFeedbackParams(const Codec& other);
-
-  Codec& operator=(const Codec& c);
-
-  bool operator==(const Codec& c) const;
-
-  bool operator!=(const Codec& c) const {
-    return !(*this == c);
-  }
-};
-
-struct AudioCodec : public Codec {
-  int bitrate;
-  size_t channels;
-
-  // Creates a codec with the given parameters.
-  AudioCodec(int id,
-             const std::string& name,
-             int clockrate,
-             int bitrate,
-             size_t channels,
-             int preference);
-  // Creates an empty codec.
-  AudioCodec();
-  AudioCodec(const AudioCodec& c);
-  ~AudioCodec() = default;
-
-  // Indicates if this codec is compatible with the specified codec.
-  bool Matches(const AudioCodec& codec) const;
-
-  static bool Preferable(const AudioCodec& first, const AudioCodec& other) {
-    return first.preference > other.preference;
-  }
-
-  std::string ToString() const;
-
-  AudioCodec& operator=(const AudioCodec& c);
-
-  bool operator==(const AudioCodec& c) const;
-
-  bool operator!=(const AudioCodec& c) const {
-    return !(*this == c);
-  }
-};
-
-struct VideoCodec : public Codec {
-  int width;
-  int height;
-  int framerate;
-
-  // Creates a codec with the given parameters.
-  VideoCodec(int id,
-             const std::string& name,
-             int width,
-             int height,
-             int framerate,
-             int preference);
-  VideoCodec(int id, const std::string& name);
-  // Creates an empty codec.
-  VideoCodec();
-  VideoCodec(const VideoCodec& c);
-  ~VideoCodec() = default;
-
-  static bool Preferable(const VideoCodec& first, const VideoCodec& other) {
-    return first.preference > other.preference;
-  }
-
-  std::string ToString() const;
-
-  VideoCodec& operator=(const VideoCodec& c);
-
-  bool operator==(const VideoCodec& c) const;
-
-  bool operator!=(const VideoCodec& c) const {
-    return !(*this == c);
-  }
-
-  static VideoCodec CreateRtxCodec(int rtx_payload_type,
-                                   int associated_payload_type);
-
-  enum CodecType {
-    CODEC_VIDEO,
-    CODEC_RED,
-    CODEC_ULPFEC,
-    CODEC_RTX,
-  };
-
-  CodecType GetCodecType() const;
-  // Validates a VideoCodec's payload type, dimensions and bitrates etc. If they
-  // don't make sense (such as max < min bitrate), and error is logged and
-  // ValidateCodecFormat returns false.
-  bool ValidateCodecFormat() const;
-};
-
-struct DataCodec : public Codec {
-  DataCodec(int id, const std::string& name, int preference);
-  DataCodec();
-  DataCodec(const DataCodec& c);
-
-  DataCodec& operator=(const DataCodec& c);
-
-  std::string ToString() const;
-};
-
-// Get the codec setting associated with |payload_type|. If there
-// is no codec associated with that payload type it returns false.
-template <class Codec>
-bool FindCodecById(const std::vector<Codec>& codecs,
-                   int payload_type,
-                   Codec* codec_out) {
-  for (const auto& codec : codecs) {
-    if (codec.id == payload_type) {
-      *codec_out = codec;
-      return true;
-    }
-  }
-  return false;
-}
-
-bool CodecNamesEq(const std::string& name1, const std::string& name2);
-bool HasNack(const VideoCodec& codec);
-bool HasRemb(const VideoCodec& codec);
-bool HasTransportCc(const VideoCodec& codec);
-
-}  // namespace cricket
-
-#endif  // TALK_MEDIA_BASE_CODEC_H_