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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/modules/video_coding/codec_database.h"
#include <assert.h>
#include "webrtc/base/checks.h"
#include "webrtc/base/logging.h"
#include "webrtc/engine_configurations.h"
#include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
#include "webrtc/modules/video_coding/codecs/i420/include/i420.h"
#include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
#include "webrtc/modules/video_coding/codecs/vp9/include/vp9.h"
#include "webrtc/modules/video_coding/internal_defines.h"
namespace {
const size_t kDefaultPayloadSize = 1440;
const uint8_t kDefaultPayloadType = 100;
}
namespace webrtc {
VideoCodecVP8 VideoEncoder::GetDefaultVp8Settings() {
VideoCodecVP8 vp8_settings;
memset(&vp8_settings, 0, sizeof(vp8_settings));
vp8_settings.resilience = kResilientStream;
vp8_settings.numberOfTemporalLayers = 1;
vp8_settings.denoisingOn = true;
vp8_settings.errorConcealmentOn = false;
vp8_settings.automaticResizeOn = false;
vp8_settings.frameDroppingOn = true;
vp8_settings.keyFrameInterval = 3000;
return vp8_settings;
}
VideoCodecVP9 VideoEncoder::GetDefaultVp9Settings() {
VideoCodecVP9 vp9_settings;
memset(&vp9_settings, 0, sizeof(vp9_settings));
vp9_settings.resilience = 1;
vp9_settings.numberOfTemporalLayers = 1;
vp9_settings.denoisingOn = false;
vp9_settings.frameDroppingOn = true;
vp9_settings.keyFrameInterval = 3000;
vp9_settings.adaptiveQpMode = true;
vp9_settings.automaticResizeOn = true;
vp9_settings.numberOfSpatialLayers = 1;
vp9_settings.flexibleMode = false;
return vp9_settings;
}
VideoCodecH264 VideoEncoder::GetDefaultH264Settings() {
VideoCodecH264 h264_settings;
memset(&h264_settings, 0, sizeof(h264_settings));
h264_settings.profile = kProfileBase;
h264_settings.frameDroppingOn = true;
h264_settings.keyFrameInterval = 3000;
h264_settings.spsData = NULL;
h264_settings.spsLen = 0;
h264_settings.ppsData = NULL;
h264_settings.ppsLen = 0;
return h264_settings;
}
VCMDecoderMapItem::VCMDecoderMapItem(VideoCodec* settings,
int number_of_cores,
bool require_key_frame)
: settings(settings),
number_of_cores(number_of_cores),
require_key_frame(require_key_frame) {
assert(number_of_cores >= 0);
}
VCMExtDecoderMapItem::VCMExtDecoderMapItem(
VideoDecoder* external_decoder_instance,
uint8_t payload_type,
bool internal_render_timing)
: payload_type(payload_type),
external_decoder_instance(external_decoder_instance),
internal_render_timing(internal_render_timing) {
}
VCMCodecDataBase::VCMCodecDataBase(
VideoEncoderRateObserver* encoder_rate_observer,
VCMEncodedFrameCallback* encoded_frame_callback)
: number_of_cores_(0),
max_payload_size_(kDefaultPayloadSize),
periodic_key_frames_(false),
pending_encoder_reset_(true),
send_codec_(),
receive_codec_(),
encoder_payload_type_(0),
external_encoder_(NULL),
internal_source_(false),
encoder_rate_observer_(encoder_rate_observer),
encoded_frame_callback_(encoded_frame_callback),
ptr_decoder_(NULL),
dec_map_(),
dec_external_map_() {}
VCMCodecDataBase::~VCMCodecDataBase() {
ResetSender();
ResetReceiver();
}
void VCMCodecDataBase::Codec(VideoCodecType codec_type, VideoCodec* settings) {
memset(settings, 0, sizeof(VideoCodec));
switch (codec_type) {
case kVideoCodecVP8:
strncpy(settings->plName, "VP8", 4);
settings->codecType = kVideoCodecVP8;
// 96 to 127 dynamic payload types for video codecs.
settings->plType = kDefaultPayloadType;
settings->startBitrate = kDefaultStartBitrateKbps;
settings->minBitrate = VCM_MIN_BITRATE;
settings->maxBitrate = 0;
settings->maxFramerate = VCM_DEFAULT_FRAME_RATE;
settings->width = VCM_DEFAULT_CODEC_WIDTH;
settings->height = VCM_DEFAULT_CODEC_HEIGHT;
settings->numberOfSimulcastStreams = 0;
settings->qpMax = 56;
settings->codecSpecific.VP8 = VideoEncoder::GetDefaultVp8Settings();
return;
case kVideoCodecVP9:
strncpy(settings->plName, "VP9", 4);
settings->codecType = kVideoCodecVP9;
// 96 to 127 dynamic payload types for video codecs.
settings->plType = kDefaultPayloadType;
settings->startBitrate = 100;
settings->minBitrate = VCM_MIN_BITRATE;
settings->maxBitrate = 0;
settings->maxFramerate = VCM_DEFAULT_FRAME_RATE;
settings->width = VCM_DEFAULT_CODEC_WIDTH;
settings->height = VCM_DEFAULT_CODEC_HEIGHT;
settings->numberOfSimulcastStreams = 0;
settings->qpMax = 56;
settings->codecSpecific.VP9 = VideoEncoder::GetDefaultVp9Settings();
return;
case kVideoCodecH264:
strncpy(settings->plName, "H264", 5);
settings->codecType = kVideoCodecH264;
// 96 to 127 dynamic payload types for video codecs.
settings->plType = kDefaultPayloadType;
settings->startBitrate = kDefaultStartBitrateKbps;
settings->minBitrate = VCM_MIN_BITRATE;
settings->maxBitrate = 0;
settings->maxFramerate = VCM_DEFAULT_FRAME_RATE;
settings->width = VCM_DEFAULT_CODEC_WIDTH;
settings->height = VCM_DEFAULT_CODEC_HEIGHT;
settings->numberOfSimulcastStreams = 0;
settings->qpMax = 56;
settings->codecSpecific.H264 = VideoEncoder::GetDefaultH264Settings();
return;
case kVideoCodecI420:
strncpy(settings->plName, "I420", 5);
settings->codecType = kVideoCodecI420;
// 96 to 127 dynamic payload types for video codecs.
settings->plType = kDefaultPayloadType;
// Bitrate needed for this size and framerate.
settings->startBitrate = 3 * VCM_DEFAULT_CODEC_WIDTH *
VCM_DEFAULT_CODEC_HEIGHT * 8 *
VCM_DEFAULT_FRAME_RATE / 1000 / 2;
settings->maxBitrate = settings->startBitrate;
settings->maxFramerate = VCM_DEFAULT_FRAME_RATE;
settings->width = VCM_DEFAULT_CODEC_WIDTH;
settings->height = VCM_DEFAULT_CODEC_HEIGHT;
settings->minBitrate = VCM_MIN_BITRATE;
settings->numberOfSimulcastStreams = 0;
return;
case kVideoCodecRED:
case kVideoCodecULPFEC:
case kVideoCodecGeneric:
case kVideoCodecUnknown:
RTC_NOTREACHED();
return;
}
}
void VCMCodecDataBase::ResetSender() {
DeleteEncoder();
periodic_key_frames_ = false;
}
// Assuming only one registered encoder - since only one used, no need for more.
bool VCMCodecDataBase::SetSendCodec(const VideoCodec* send_codec,
int number_of_cores,
size_t max_payload_size) {
RTC_DCHECK(send_codec);
if (max_payload_size == 0) {
max_payload_size = kDefaultPayloadSize;
}
RTC_DCHECK_GE(number_of_cores, 1);
RTC_DCHECK_GE(send_codec->plType, 1);
// Make sure the start bit rate is sane...
RTC_DCHECK_LE(send_codec->startBitrate, 1000000u);
RTC_DCHECK(send_codec->codecType != kVideoCodecUnknown);
bool reset_required = pending_encoder_reset_;
if (number_of_cores_ != number_of_cores) {
number_of_cores_ = number_of_cores;
reset_required = true;
}
if (max_payload_size_ != max_payload_size) {
max_payload_size_ = max_payload_size;
reset_required = true;
}
VideoCodec new_send_codec;
memcpy(&new_send_codec, send_codec, sizeof(new_send_codec));
if (new_send_codec.maxBitrate == 0) {
// max is one bit per pixel
new_send_codec.maxBitrate = (static_cast<int>(send_codec->height) *
static_cast<int>(send_codec->width) *
static_cast<int>(send_codec->maxFramerate)) / 1000;
if (send_codec->startBitrate > new_send_codec.maxBitrate) {
// But if the user tries to set a higher start bit rate we will
// increase the max accordingly.
new_send_codec.maxBitrate = send_codec->startBitrate;
}
}
if (new_send_codec.startBitrate > new_send_codec.maxBitrate)
new_send_codec.startBitrate = new_send_codec.maxBitrate;
if (!reset_required) {
reset_required = RequiresEncoderReset(new_send_codec);
}
memcpy(&send_codec_, &new_send_codec, sizeof(send_codec_));
if (!reset_required) {
encoded_frame_callback_->SetPayloadType(send_codec_.plType);
return true;
}
// If encoder exists, will destroy it and create new one.
DeleteEncoder();
RTC_DCHECK_EQ(encoder_payload_type_, send_codec_.plType)
<< "Encoder not registered for payload type " << send_codec_.plType;
ptr_encoder_.reset(
new VCMGenericEncoder(external_encoder_, encoder_rate_observer_,
encoded_frame_callback_, internal_source_));
encoded_frame_callback_->SetPayloadType(send_codec_.plType);
encoded_frame_callback_->SetInternalSource(internal_source_);
if (ptr_encoder_->InitEncode(&send_codec_, number_of_cores_,
max_payload_size_) < 0) {
LOG(LS_ERROR) << "Failed to initialize video encoder.";
DeleteEncoder();
return false;
}
// Intentionally don't check return value since the encoder registration
// shouldn't fail because the codec doesn't support changing the periodic key
// frame setting.
ptr_encoder_->SetPeriodicKeyFrames(periodic_key_frames_);
pending_encoder_reset_ = false;
return true;
}
bool VCMCodecDataBase::SendCodec(VideoCodec* current_send_codec) const {
if (!ptr_encoder_) {
return false;
}
memcpy(current_send_codec, &send_codec_, sizeof(VideoCodec));
return true;
}
VideoCodecType VCMCodecDataBase::SendCodec() const {
if (!ptr_encoder_) {
return kVideoCodecUnknown;
}
return send_codec_.codecType;
}
bool VCMCodecDataBase::DeregisterExternalEncoder(
uint8_t payload_type, bool* was_send_codec) {
assert(was_send_codec);
*was_send_codec = false;
if (encoder_payload_type_ != payload_type) {
return false;
}
if (send_codec_.plType == payload_type) {
// De-register as send codec if needed.
DeleteEncoder();
memset(&send_codec_, 0, sizeof(VideoCodec));
*was_send_codec = true;
}
encoder_payload_type_ = 0;
external_encoder_ = NULL;
internal_source_ = false;
return true;
}
void VCMCodecDataBase::RegisterExternalEncoder(
VideoEncoder* external_encoder,
uint8_t payload_type,
bool internal_source) {
// Since only one encoder can be used at a given time, only one external
// encoder can be registered/used.
external_encoder_ = external_encoder;
encoder_payload_type_ = payload_type;
internal_source_ = internal_source;
pending_encoder_reset_ = true;
}
bool VCMCodecDataBase::RequiresEncoderReset(const VideoCodec& new_send_codec) {
if (ptr_encoder_ == NULL) {
return true;
}
// Does not check startBitrate or maxFramerate
if (new_send_codec.codecType != send_codec_.codecType ||
strcmp(new_send_codec.plName, send_codec_.plName) != 0 ||
new_send_codec.plType != send_codec_.plType ||
new_send_codec.width != send_codec_.width ||
new_send_codec.height != send_codec_.height ||
new_send_codec.maxBitrate != send_codec_.maxBitrate ||
new_send_codec.minBitrate != send_codec_.minBitrate ||
new_send_codec.qpMax != send_codec_.qpMax ||
new_send_codec.numberOfSimulcastStreams !=
send_codec_.numberOfSimulcastStreams ||
new_send_codec.mode != send_codec_.mode ||
new_send_codec.extra_options != send_codec_.extra_options) {
return true;
}
switch (new_send_codec.codecType) {
case kVideoCodecVP8:
if (memcmp(&new_send_codec.codecSpecific.VP8,
&send_codec_.codecSpecific.VP8,
sizeof(new_send_codec.codecSpecific.VP8)) != 0) {
return true;
}
break;
case kVideoCodecVP9:
if (memcmp(&new_send_codec.codecSpecific.VP9,
&send_codec_.codecSpecific.VP9,
sizeof(new_send_codec.codecSpecific.VP9)) != 0) {
return true;
}
break;
case kVideoCodecH264:
if (memcmp(&new_send_codec.codecSpecific.H264,
&send_codec_.codecSpecific.H264,
sizeof(new_send_codec.codecSpecific.H264)) != 0) {
return true;
}
break;
case kVideoCodecGeneric:
break;
// Known codecs without payload-specifics
case kVideoCodecI420:
case kVideoCodecRED:
case kVideoCodecULPFEC:
break;
// Unknown codec type, reset just to be sure.
case kVideoCodecUnknown:
return true;
}
if (new_send_codec.numberOfSimulcastStreams > 0) {
for (unsigned char i = 0; i < new_send_codec.numberOfSimulcastStreams;
++i) {
if (memcmp(&new_send_codec.simulcastStream[i],
&send_codec_.simulcastStream[i],
sizeof(new_send_codec.simulcastStream[i])) !=
0) {
return true;
}
}
}
return false;
}
VCMGenericEncoder* VCMCodecDataBase::GetEncoder() {
return ptr_encoder_.get();
}
bool VCMCodecDataBase::SetPeriodicKeyFrames(bool enable) {
periodic_key_frames_ = enable;
if (ptr_encoder_) {
return (ptr_encoder_->SetPeriodicKeyFrames(periodic_key_frames_) == 0);
}
return true;
}
void VCMCodecDataBase::ResetReceiver() {
ReleaseDecoder(ptr_decoder_);
ptr_decoder_ = NULL;
memset(&receive_codec_, 0, sizeof(VideoCodec));
while (!dec_map_.empty()) {
DecoderMap::iterator it = dec_map_.begin();
delete (*it).second;
dec_map_.erase(it);
}
while (!dec_external_map_.empty()) {
ExternalDecoderMap::iterator external_it = dec_external_map_.begin();
delete (*external_it).second;
dec_external_map_.erase(external_it);
}
}
bool VCMCodecDataBase::DeregisterExternalDecoder(uint8_t payload_type) {
ExternalDecoderMap::iterator it = dec_external_map_.find(payload_type);
if (it == dec_external_map_.end()) {
// Not found
return false;
}
// We can't use payload_type to check if the decoder is currently in use,
// because payload type may be out of date (e.g. before we decode the first
// frame after RegisterReceiveCodec)
if (ptr_decoder_ != NULL &&
&ptr_decoder_->_decoder == (*it).second->external_decoder_instance) {
// Release it if it was registered and in use.
ReleaseDecoder(ptr_decoder_);
ptr_decoder_ = NULL;
}
DeregisterReceiveCodec(payload_type);
delete (*it).second;
dec_external_map_.erase(it);
return true;
}
// Add the external encoder object to the list of external decoders.
// Won't be registered as a receive codec until RegisterReceiveCodec is called.
void VCMCodecDataBase::RegisterExternalDecoder(
VideoDecoder* external_decoder,
uint8_t payload_type,
bool internal_render_timing) {
// Check if payload value already exists, if so - erase old and insert new.
VCMExtDecoderMapItem* ext_decoder = new VCMExtDecoderMapItem(
external_decoder, payload_type, internal_render_timing);
DeregisterExternalDecoder(payload_type);
dec_external_map_[payload_type] = ext_decoder;
}
bool VCMCodecDataBase::DecoderRegistered() const {
return !dec_map_.empty();
}
bool VCMCodecDataBase::RegisterReceiveCodec(
const VideoCodec* receive_codec,
int number_of_cores,
bool require_key_frame) {
if (number_of_cores < 0) {
return false;
}
// Check if payload value already exists, if so - erase old and insert new.
DeregisterReceiveCodec(receive_codec->plType);
if (receive_codec->codecType == kVideoCodecUnknown) {
return false;
}
VideoCodec* new_receive_codec = new VideoCodec(*receive_codec);
dec_map_[receive_codec->plType] = new VCMDecoderMapItem(new_receive_codec,
number_of_cores,
require_key_frame);
return true;
}
bool VCMCodecDataBase::DeregisterReceiveCodec(
uint8_t payload_type) {
DecoderMap::iterator it = dec_map_.find(payload_type);
if (it == dec_map_.end()) {
return false;
}
VCMDecoderMapItem* dec_item = (*it).second;
delete dec_item;
dec_map_.erase(it);
if (receive_codec_.plType == payload_type) {
// This codec is currently in use.
memset(&receive_codec_, 0, sizeof(VideoCodec));
}
return true;
}
bool VCMCodecDataBase::ReceiveCodec(VideoCodec* current_receive_codec) const {
assert(current_receive_codec);
if (!ptr_decoder_) {
return false;
}
memcpy(current_receive_codec, &receive_codec_, sizeof(VideoCodec));
return true;
}
VideoCodecType VCMCodecDataBase::ReceiveCodec() const {
if (!ptr_decoder_) {
return kVideoCodecUnknown;
}
return receive_codec_.codecType;
}
VCMGenericDecoder* VCMCodecDataBase::GetDecoder(
uint8_t payload_type, VCMDecodedFrameCallback* decoded_frame_callback) {
if (payload_type == receive_codec_.plType || payload_type == 0) {
return ptr_decoder_;
}
// Check for exisitng decoder, if exists - delete.
if (ptr_decoder_) {
ReleaseDecoder(ptr_decoder_);
ptr_decoder_ = NULL;
memset(&receive_codec_, 0, sizeof(VideoCodec));
}
ptr_decoder_ = CreateAndInitDecoder(payload_type, &receive_codec_);
if (!ptr_decoder_) {
return NULL;
}
VCMReceiveCallback* callback = decoded_frame_callback->UserReceiveCallback();
if (callback) callback->OnIncomingPayloadType(receive_codec_.plType);
if (ptr_decoder_->RegisterDecodeCompleteCallback(decoded_frame_callback)
< 0) {
ReleaseDecoder(ptr_decoder_);
ptr_decoder_ = NULL;
memset(&receive_codec_, 0, sizeof(VideoCodec));
return NULL;
}
return ptr_decoder_;
}
void VCMCodecDataBase::ReleaseDecoder(VCMGenericDecoder* decoder) const {
if (decoder) {
assert(&decoder->_decoder);
decoder->Release();
if (!decoder->External()) {
delete &decoder->_decoder;
}
delete decoder;
}
}
bool VCMCodecDataBase::SupportsRenderScheduling() const {
const VCMExtDecoderMapItem* ext_item = FindExternalDecoderItem(
receive_codec_.plType);
if (ext_item == nullptr)
return true;
return ext_item->internal_render_timing;
}
bool VCMCodecDataBase::MatchesCurrentResolution(int width, int height) const {
return send_codec_.width == width && send_codec_.height == height;
}
VCMGenericDecoder* VCMCodecDataBase::CreateAndInitDecoder(
uint8_t payload_type,
VideoCodec* new_codec) const {
assert(new_codec);
const VCMDecoderMapItem* decoder_item = FindDecoderItem(payload_type);
if (!decoder_item) {
LOG(LS_ERROR) << "Can't find a decoder associated with payload type: "
<< static_cast<int>(payload_type);
return NULL;
}
VCMGenericDecoder* ptr_decoder = NULL;
const VCMExtDecoderMapItem* external_dec_item =
FindExternalDecoderItem(payload_type);
if (external_dec_item) {
// External codec.
ptr_decoder = new VCMGenericDecoder(
*external_dec_item->external_decoder_instance, true);
} else {
// Create decoder.
ptr_decoder = CreateDecoder(decoder_item->settings->codecType);
}
if (!ptr_decoder)
return NULL;
if (ptr_decoder->InitDecode(decoder_item->settings.get(),
decoder_item->number_of_cores) < 0) {
ReleaseDecoder(ptr_decoder);
return NULL;
}
memcpy(new_codec, decoder_item->settings.get(), sizeof(VideoCodec));
return ptr_decoder;
}
void VCMCodecDataBase::DeleteEncoder() {
if (!ptr_encoder_)
return;
ptr_encoder_->Release();
ptr_encoder_.reset();
}
VCMGenericDecoder* VCMCodecDataBase::CreateDecoder(VideoCodecType type) const {
switch (type) {
case kVideoCodecVP8:
return new VCMGenericDecoder(*(VP8Decoder::Create()));
case kVideoCodecVP9:
return new VCMGenericDecoder(*(VP9Decoder::Create()));
case kVideoCodecI420:
return new VCMGenericDecoder(*(new I420Decoder));
case kVideoCodecH264:
if (H264Decoder::IsSupported()) {
return new VCMGenericDecoder(*(H264Decoder::Create()));
}
break;
default:
break;
}
LOG(LS_WARNING) << "No internal decoder of this type exists.";
return NULL;
}
const VCMDecoderMapItem* VCMCodecDataBase::FindDecoderItem(
uint8_t payload_type) const {
DecoderMap::const_iterator it = dec_map_.find(payload_type);
if (it != dec_map_.end()) {
return (*it).second;
}
return NULL;
}
const VCMExtDecoderMapItem* VCMCodecDataBase::FindExternalDecoderItem(
uint8_t payload_type) const {
ExternalDecoderMap::const_iterator it = dec_external_map_.find(payload_type);
if (it != dec_external_map_.end()) {
return (*it).second;
}
return NULL;
}
} // namespace webrtc