Move talk/media to webrtc/media

talk/media/base/codec.cc

-/*
- * 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.
- */
-
-#include "talk/media/base/codec.h"
-
-#include <algorithm>
-#include <sstream>
-
-#include "webrtc/base/common.h"
-#include "webrtc/base/logging.h"
-#include "webrtc/base/stringencode.h"
-#include "webrtc/base/stringutils.h"
-
-namespace cricket {
-
-const int kMaxPayloadId = 127;
-
-bool FeedbackParam::operator==(const FeedbackParam& other) const {
-  return _stricmp(other.id().c_str(), id().c_str()) == 0 &&
-      _stricmp(other.param().c_str(), param().c_str()) == 0;
-}
-
-bool FeedbackParams::operator==(const FeedbackParams& other) const {
-  return params_ == other.params_;
-}
-
-bool FeedbackParams::Has(const FeedbackParam& param) const {
-  return std::find(params_.begin(), params_.end(), param) != params_.end();
-}
-
-void FeedbackParams::Add(const FeedbackParam& param) {
-  if (param.id().empty()) {
-    return;
-  }
-  if (Has(param)) {
-    // Param already in |this|.
-    return;
-  }
-  params_.push_back(param);
-  ASSERT(!HasDuplicateEntries());
-}
-
-void FeedbackParams::Intersect(const FeedbackParams& from) {
-  std::vector<FeedbackParam>::iterator iter_to = params_.begin();
-  while (iter_to != params_.end()) {
-    if (!from.Has(*iter_to)) {
-      iter_to = params_.erase(iter_to);
-    } else {
-      ++iter_to;
-    }
-  }
-}
-
-bool FeedbackParams::HasDuplicateEntries() const {
-  for (std::vector<FeedbackParam>::const_iterator iter = params_.begin();
-       iter != params_.end(); ++iter) {
-    for (std::vector<FeedbackParam>::const_iterator found = iter + 1;
-         found != params_.end(); ++found) {
-      if (*found == *iter) {
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
-Codec::Codec(int id, const std::string& name, int clockrate, int preference)
-    : id(id), name(name), clockrate(clockrate), preference(preference) {
-}
-
-Codec::Codec() : id(0), clockrate(0), preference(0) {
-}
-
-Codec::Codec(const Codec& c) = default;
-
-Codec::~Codec() = default;
-
-Codec& Codec::operator=(const Codec& c) {
-  this->id = c.id;  // id is reserved in objective-c
-  name = c.name;
-  clockrate = c.clockrate;
-  preference = c.preference;
-  params = c.params;
-  feedback_params = c.feedback_params;
-  return *this;
-}
-
-bool Codec::operator==(const Codec& c) const {
-  return this->id == c.id &&  // id is reserved in objective-c
-         name == c.name && clockrate == c.clockrate &&
-         preference == c.preference && params == c.params &&
-         feedback_params == c.feedback_params;
-}
-
-bool Codec::Matches(const Codec& codec) const {
-  // Match the codec id/name based on the typical static/dynamic name rules.
-  // Matching is case-insensitive.
-  const int kMaxStaticPayloadId = 95;
-  return (codec.id <= kMaxStaticPayloadId) ?
-      (id == codec.id) : (_stricmp(name.c_str(), codec.name.c_str()) == 0);
-}
-
-bool Codec::GetParam(const std::string& name, std::string* out) const {
-  CodecParameterMap::const_iterator iter = params.find(name);
-  if (iter == params.end())
-    return false;
-  *out = iter->second;
-  return true;
-}
-
-bool Codec::GetParam(const std::string& name, int* out) const {
-  CodecParameterMap::const_iterator iter = params.find(name);
-  if (iter == params.end())
-    return false;
-  return rtc::FromString(iter->second, out);
-}
-
-void Codec::SetParam(const std::string& name, const std::string& value) {
-  params[name] = value;
-}
-
-void Codec::SetParam(const std::string& name, int value)  {
-  params[name] = rtc::ToString(value);
-}
-
-bool Codec::RemoveParam(const std::string& name) {
-  return params.erase(name) == 1;
-}
-
-void Codec::AddFeedbackParam(const FeedbackParam& param) {
-  feedback_params.Add(param);
-}
-
-bool Codec::HasFeedbackParam(const FeedbackParam& param) const {
-  return feedback_params.Has(param);
-}
-
-void Codec::IntersectFeedbackParams(const Codec& other) {
-  feedback_params.Intersect(other.feedback_params);
-}
-
-AudioCodec::AudioCodec(int id,
-                       const std::string& name,
-                       int clockrate,
-                       int bitrate,
-                       size_t channels,
-                       int preference)
-    : Codec(id, name, clockrate, preference),
-      bitrate(bitrate),
-      channels(channels) {
-}
-
-AudioCodec::AudioCodec() : Codec(), bitrate(0), channels(0) {
-}
-
-AudioCodec::AudioCodec(const AudioCodec& c) = default;
-
-AudioCodec& AudioCodec::operator=(const AudioCodec& c) {
-  Codec::operator=(c);
-  bitrate = c.bitrate;
-  channels = c.channels;
-  return *this;
-}
-
-bool AudioCodec::operator==(const AudioCodec& c) const {
-  return bitrate == c.bitrate && channels == c.channels && Codec::operator==(c);
-}
-
-bool AudioCodec::Matches(const AudioCodec& codec) const {
-  // If a nonzero clockrate is specified, it must match the actual clockrate.
-  // If a nonzero bitrate is specified, it must match the actual bitrate,
-  // unless the codec is VBR (0), where we just force the supplied value.
-  // The number of channels must match exactly, with the exception
-  // that channels=0 is treated synonymously as channels=1, per RFC
-  // 4566 section 6: " [The channels] parameter is OPTIONAL and may be
-  // omitted if the number of channels is one."
-  // Preference is ignored.
-  // TODO(juberti): Treat a zero clockrate as 8000Hz, the RTP default clockrate.
-  return Codec::Matches(codec) &&
-      ((codec.clockrate == 0 /*&& clockrate == 8000*/) ||
-          clockrate == codec.clockrate) &&
-      (codec.bitrate == 0 || bitrate <= 0 || bitrate == codec.bitrate) &&
-      ((codec.channels < 2 && channels < 2) || channels == codec.channels);
-}
-
-std::string AudioCodec::ToString() const {
-  std::ostringstream os;
-  os << "AudioCodec[" << id << ":" << name << ":" << clockrate << ":" << bitrate
-     << ":" << channels << ":" << preference << "]";
-  return os.str();
-}
-
-std::string VideoCodec::ToString() const {
-  std::ostringstream os;
-  os << "VideoCodec[" << id << ":" << name << ":" << width << ":" << height
-     << ":" << framerate << ":" << preference << "]";
-  return os.str();
-}
-
-VideoCodec::VideoCodec(int id,
-                       const std::string& name,
-                       int width,
-                       int height,
-                       int framerate,
-                       int preference)
-    : Codec(id, name, kVideoCodecClockrate, preference),
-      width(width),
-      height(height),
-      framerate(framerate) {
-}
-
-VideoCodec::VideoCodec(int id, const std::string& name)
-    : Codec(id, name, kVideoCodecClockrate, 0),
-      width(0),
-      height(0),
-      framerate(0) {
-}
-
-VideoCodec::VideoCodec() : Codec(), width(0), height(0), framerate(0) {
-  clockrate = kVideoCodecClockrate;
-}
-
-VideoCodec::VideoCodec(const VideoCodec& c) = default;
-
-VideoCodec& VideoCodec::operator=(const VideoCodec& c) {
-  Codec::operator=(c);
-  width = c.width;
-  height = c.height;
-  framerate = c.framerate;
-  return *this;
-}
-
-bool VideoCodec::operator==(const VideoCodec& c) const {
-  return width == c.width && height == c.height && framerate == c.framerate &&
-         Codec::operator==(c);
-}
-
-VideoCodec VideoCodec::CreateRtxCodec(int rtx_payload_type,
-                                      int associated_payload_type) {
-  VideoCodec rtx_codec(rtx_payload_type, kRtxCodecName, 0, 0, 0, 0);
-  rtx_codec.SetParam(kCodecParamAssociatedPayloadType, associated_payload_type);
-  return rtx_codec;
-}
-
-VideoCodec::CodecType VideoCodec::GetCodecType() const {
-  const char* payload_name = name.c_str();
-  if (_stricmp(payload_name, kRedCodecName) == 0) {
-    return CODEC_RED;
-  }
-  if (_stricmp(payload_name, kUlpfecCodecName) == 0) {
-    return CODEC_ULPFEC;
-  }
-  if (_stricmp(payload_name, kRtxCodecName) == 0) {
-    return CODEC_RTX;
-  }
-
-  return CODEC_VIDEO;
-}
-
-bool VideoCodec::ValidateCodecFormat() const {
-  if (id < 0 || id > 127) {
-    LOG(LS_ERROR) << "Codec with invalid payload type: " << ToString();
-    return false;
-  }
-  if (GetCodecType() != CODEC_VIDEO) {
-    return true;
-  }
-
-  // Video validation from here on.
-
-  if (width <= 0 || height <= 0) {
-    LOG(LS_ERROR) << "Codec with invalid dimensions: " << ToString();
-    return false;
-  }
-  int min_bitrate = -1;
-  int max_bitrate = -1;
-  if (GetParam(kCodecParamMinBitrate, &min_bitrate) &&
-      GetParam(kCodecParamMaxBitrate, &max_bitrate)) {
-    if (max_bitrate < min_bitrate) {
-      LOG(LS_ERROR) << "Codec with max < min bitrate: " << ToString();
-      return false;
-    }
-  }
-  return true;
-}
-
-DataCodec::DataCodec(int id, const std::string& name, int preference)
-    : Codec(id, name, kDataCodecClockrate, preference) {
-}
-
-DataCodec::DataCodec() : Codec() {
-  clockrate = kDataCodecClockrate;
-}
-
-DataCodec::DataCodec(const DataCodec& c) = default;
-
-DataCodec& DataCodec::operator=(const DataCodec& c) = default;
-
-std::string DataCodec::ToString() const {
-  std::ostringstream os;
-  os << "DataCodec[" << id << ":" << name << "]";
-  return os.str();
-}
-
-bool HasNack(const Codec& codec) {
-  return codec.HasFeedbackParam(
-      FeedbackParam(kRtcpFbParamNack, kParamValueEmpty));
-}
-
-bool HasRemb(const Codec& codec) {
-  return codec.HasFeedbackParam(
-      FeedbackParam(kRtcpFbParamRemb, kParamValueEmpty));
-}
-
-bool HasTransportCc(const Codec& codec) {
-  return codec.HasFeedbackParam(
-      FeedbackParam(kRtcpFbParamTransportCc, kParamValueEmpty));
-}
-
-bool CodecNamesEq(const std::string& name1, const std::string& name2) {
-  return _stricmp(name1.c_str(), name2.c_str()) == 0;
-}
-
-}  // namespace cricket