blob: 5e49785e9de081d3afd54dd8a57fa7bcf2de0be2 [file] [log] [blame]
* Copyright (c) 2004 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.
#include <map>
#include <set>
#include <string>
#include <vector>
#include "webrtc/api/rtpparameters.h"
#include "webrtc/common_types.h"
#include "webrtc/media/base/mediaconstants.h"
namespace cricket {
typedef std::map<std::string, std::string> CodecParameterMap;
class FeedbackParam {
FeedbackParam() = default;
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_; }
std::string id_; // e.g. "nack", "ccm"
std::string param_; // e.g. "", "rpsi", "fir"
class FeedbackParams {
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_; }
bool HasDuplicateEntries() const;
std::vector<FeedbackParam> params_;
struct Codec {
int id;
std::string name;
int clockrate;
CodecParameterMap params;
FeedbackParams feedback_params;
virtual ~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);
// Filter |this| feedbacks params such that only those shared by both |this|
// and |other| are kept.
void IntersectFeedbackParams(const Codec& other);
virtual webrtc::RtpCodecParameters ToCodecParameters() const;
Codec& operator=(const Codec& c);
Codec& operator=(Codec&& c);
bool operator==(const Codec& c) const;
bool operator!=(const Codec& c) const {
return !(*this == c);
// A Codec can't be created without a subclass.
// Creates a codec with the given parameters.
Codec(int id, const std::string& name, int clockrate);
// Creates an empty codec.
Codec(const Codec& c);
Codec(Codec&& 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);
// Creates an empty codec.
AudioCodec(const AudioCodec& c);
AudioCodec(AudioCodec&& c);
virtual ~AudioCodec() = default;
// Indicates if this codec is compatible with the specified codec.
bool Matches(const AudioCodec& codec) const;
std::string ToString() const;
webrtc::RtpCodecParameters ToCodecParameters() const override;
AudioCodec& operator=(const AudioCodec& c);
AudioCodec& operator=(AudioCodec&& c);
bool operator==(const AudioCodec& c) const;
bool operator!=(const AudioCodec& c) const {
return !(*this == c);
inline std::ostream& operator<<(std::ostream& os, const AudioCodec& ac) {
os << "{id: " <<;
os << ", name: " <<;
os << ", clockrate: " << ac.clockrate;
os << ", bitrate: " << ac.bitrate;
os << ", channels: " << ac.channels;
os << ", params: {";
const char* sep = "";
for (const auto& kv : ac.params) {
os << sep << kv.first << ": " << kv.second;
sep = ", ";
os << "}, feedback_params: {";
sep = "";
for (const FeedbackParam& fp : ac.feedback_params.params()) {
os << sep << << ": " << fp.param();
sep = ", ";
os << "}}";
return os;
struct 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.
explicit VideoCodec(const std::string& name);
// Creates an empty codec.
VideoCodec(const VideoCodec& c);
VideoCodec(VideoCodec&& c);
virtual ~VideoCodec() = default;
// Indicates if this video codec is the same as the other video codec, e.g. if
// they are both VP8 or VP9, or if they are both H264 with the same H264
// profile. H264 levels however are not compared.
bool Matches(const VideoCodec& codec) const;
std::string ToString() const;
webrtc::RtpCodecParameters ToCodecParameters() const override;
VideoCodec& operator=(const VideoCodec& c);
VideoCodec& operator=(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 {
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;
void SetDefaultParameters();
struct DataCodec : public Codec {
DataCodec(int id, const std::string& name);
DataCodec(const DataCodec& c);
DataCodec(DataCodec&& c);
virtual ~DataCodec() = default;
DataCodec& operator=(const DataCodec& c);
DataCodec& operator=(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 nullptr.
template <class Codec>
const Codec* FindCodecById(const std::vector<Codec>& codecs, int payload_type) {
for (const auto& codec : codecs) {
if ( == payload_type)
return &codec;
return nullptr;
bool CodecNamesEq(const std::string& name1, const std::string& name2);
bool CodecNamesEq(const char* name1, const char* name2);
bool HasNack(const Codec& codec);
bool HasRemb(const Codec& codec);
bool HasTransportCc(const Codec& codec);
// Returns the first codec in |supported_codecs| that matches |codec|, or
// nullptr if no codec matches.
const VideoCodec* FindMatchingCodec(
const std::vector<VideoCodec>& supported_codecs,
const VideoCodec& codec);
} // namespace cricket