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/*
* Copyright (c) 2012 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 "webrtc/common_types.h"
#include <string.h>
#include <algorithm>
#include <limits>
#include <type_traits>
#include "webrtc/rtc_base/checks.h"
#include "webrtc/rtc_base/stringutils.h"
namespace webrtc {
StreamDataCounters::StreamDataCounters() : first_packet_time_ms(-1) {}
constexpr size_t StreamId::kMaxSize;
bool StreamId::IsLegalName(rtc::ArrayView<const char> name) {
return (name.size() <= kMaxSize && name.size() > 0 &&
std::all_of(name.data(), name.data() + name.size(), isalnum));
}
void StreamId::Set(const char* data, size_t size) {
// If |data| contains \0, the stream id size might become less than |size|.
RTC_CHECK_LE(size, kMaxSize);
memcpy(value_, data, size);
if (size < kMaxSize)
value_[size] = 0;
}
// StreamId is used as member of RTPHeader that is sometimes copied with memcpy
// and thus assume trivial destructibility.
static_assert(std::is_trivially_destructible<StreamId>::value, "");
RTPHeaderExtension::RTPHeaderExtension()
: hasTransmissionTimeOffset(false),
transmissionTimeOffset(0),
hasAbsoluteSendTime(false),
absoluteSendTime(0),
hasTransportSequenceNumber(false),
transportSequenceNumber(0),
hasAudioLevel(false),
voiceActivity(false),
audioLevel(0),
hasVideoRotation(false),
videoRotation(kVideoRotation_0),
hasVideoContentType(false),
videoContentType(VideoContentType::UNSPECIFIED),
has_video_timing(false) {}
RTPHeaderExtension::RTPHeaderExtension(const RTPHeaderExtension& other) =
default;
RTPHeaderExtension& RTPHeaderExtension::operator=(
const RTPHeaderExtension& other) = default;
RTPHeader::RTPHeader()
: markerBit(false),
payloadType(0),
sequenceNumber(0),
timestamp(0),
ssrc(0),
numCSRCs(0),
arrOfCSRCs(),
paddingLength(0),
headerLength(0),
payload_type_frequency(0),
extension() {}
RTPHeader::RTPHeader(const RTPHeader& other) = default;
RTPHeader& RTPHeader::operator=(const RTPHeader& other) = default;
VideoCodec::VideoCodec()
: codecType(kVideoCodecUnknown),
plName(),
plType(0),
width(0),
height(0),
startBitrate(0),
maxBitrate(0),
minBitrate(0),
targetBitrate(0),
maxFramerate(0),
qpMax(0),
numberOfSimulcastStreams(0),
simulcastStream(),
spatialLayers(),
mode(kRealtimeVideo),
expect_encode_from_texture(false),
timing_frame_thresholds({0, 0}),
codec_specific_() {}
VideoCodecVP8* VideoCodec::VP8() {
RTC_DCHECK_EQ(codecType, kVideoCodecVP8);
return &codec_specific_.VP8;
}
const VideoCodecVP8& VideoCodec::VP8() const {
RTC_DCHECK_EQ(codecType, kVideoCodecVP8);
return codec_specific_.VP8;
}
VideoCodecVP9* VideoCodec::VP9() {
RTC_DCHECK_EQ(codecType, kVideoCodecVP9);
return &codec_specific_.VP9;
}
const VideoCodecVP9& VideoCodec::VP9() const {
RTC_DCHECK_EQ(codecType, kVideoCodecVP9);
return codec_specific_.VP9;
}
VideoCodecH264* VideoCodec::H264() {
RTC_DCHECK_EQ(codecType, kVideoCodecH264);
return &codec_specific_.H264;
}
const VideoCodecH264& VideoCodec::H264() const {
RTC_DCHECK_EQ(codecType, kVideoCodecH264);
return codec_specific_.H264;
}
static const char* kPayloadNameVp8 = "VP8";
static const char* kPayloadNameVp9 = "VP9";
static const char* kPayloadNameH264 = "H264";
static const char* kPayloadNameI420 = "I420";
static const char* kPayloadNameRED = "RED";
static const char* kPayloadNameULPFEC = "ULPFEC";
static const char* kPayloadNameGeneric = "Generic";
static bool CodecNamesEq(const char* name1, const char* name2) {
return _stricmp(name1, name2) == 0;
}
const char* CodecTypeToPayloadString(VideoCodecType type) {
switch (type) {
case kVideoCodecVP8:
return kPayloadNameVp8;
case kVideoCodecVP9:
return kPayloadNameVp9;
case kVideoCodecH264:
return kPayloadNameH264;
case kVideoCodecI420:
return kPayloadNameI420;
case kVideoCodecRED:
return kPayloadNameRED;
case kVideoCodecULPFEC:
return kPayloadNameULPFEC;
default:
// Unrecognized codecs default to generic.
return kPayloadNameGeneric;
}
}
VideoCodecType PayloadStringToCodecType(const std::string& name) {
if (CodecNamesEq(name.c_str(), kPayloadNameVp8))
return kVideoCodecVP8;
if (CodecNamesEq(name.c_str(), kPayloadNameVp9))
return kVideoCodecVP9;
if (CodecNamesEq(name.c_str(), kPayloadNameH264))
return kVideoCodecH264;
if (CodecNamesEq(name.c_str(), kPayloadNameI420))
return kVideoCodecI420;
if (CodecNamesEq(name.c_str(), kPayloadNameRED))
return kVideoCodecRED;
if (CodecNamesEq(name.c_str(), kPayloadNameULPFEC))
return kVideoCodecULPFEC;
return kVideoCodecGeneric;
}
const uint32_t BitrateAllocation::kMaxBitrateBps =
std::numeric_limits<uint32_t>::max();
BitrateAllocation::BitrateAllocation() : sum_(0), bitrates_{} {}
bool BitrateAllocation::SetBitrate(size_t spatial_index,
size_t temporal_index,
uint32_t bitrate_bps) {
RTC_CHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_CHECK_LT(temporal_index, kMaxTemporalStreams);
RTC_CHECK_LE(bitrates_[spatial_index][temporal_index], sum_);
uint64_t new_bitrate_sum_bps = sum_;
new_bitrate_sum_bps -= bitrates_[spatial_index][temporal_index];
new_bitrate_sum_bps += bitrate_bps;
if (new_bitrate_sum_bps > kMaxBitrateBps)
return false;
bitrates_[spatial_index][temporal_index] = bitrate_bps;
sum_ = static_cast<uint32_t>(new_bitrate_sum_bps);
return true;
}
uint32_t BitrateAllocation::GetBitrate(size_t spatial_index,
size_t temporal_index) const {
RTC_CHECK_LT(spatial_index, kMaxSpatialLayers);
RTC_CHECK_LT(temporal_index, kMaxTemporalStreams);
return bitrates_[spatial_index][temporal_index];
}
// Get the sum of all the temporal layer for a specific spatial layer.
uint32_t BitrateAllocation::GetSpatialLayerSum(size_t spatial_index) const {
RTC_CHECK_LT(spatial_index, kMaxSpatialLayers);
uint32_t sum = 0;
for (int i = 0; i < kMaxTemporalStreams; ++i)
sum += bitrates_[spatial_index][i];
return sum;
}
std::string BitrateAllocation::ToString() const {
if (sum_ == 0)
return "BitrateAllocation [ [] ]";
// TODO(sprang): Replace this stringstream with something cheaper.
std::ostringstream oss;
oss << "BitrateAllocation [";
uint32_t spatial_cumulator = 0;
for (int si = 0; si < kMaxSpatialLayers; ++si) {
RTC_DCHECK_LE(spatial_cumulator, sum_);
if (spatial_cumulator == sum_)
break;
const uint32_t layer_sum = GetSpatialLayerSum(si);
if (layer_sum == sum_) {
oss << " [";
} else {
if (si > 0)
oss << ",";
oss << std::endl << " [";
}
spatial_cumulator += layer_sum;
uint32_t temporal_cumulator = 0;
for (int ti = 0; ti < kMaxTemporalStreams; ++ti) {
RTC_DCHECK_LE(temporal_cumulator, layer_sum);
if (temporal_cumulator == layer_sum)
break;
if (ti > 0)
oss << ", ";
uint32_t bitrate = bitrates_[si][ti];
oss << bitrate;
temporal_cumulator += bitrate;
}
oss << "]";
}
RTC_DCHECK_EQ(spatial_cumulator, sum_);
oss << " ]";
return oss.str();
}
std::ostream& BitrateAllocation::operator<<(std::ostream& os) const {
os << ToString();
return os;
}
} // namespace webrtc