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platform-external-webrtc/talk/media/webrtc/webrtcvideoengine2.cc

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/*
* libjingle
* Copyright 2014 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.
*/
#ifdef HAVE_WEBRTC_VIDEO
#include "talk/media/webrtc/webrtcvideoengine2.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <math.h>
#include <string>
#include "libyuv/convert_from.h"
#include "talk/base/buffer.h"
#include "talk/base/logging.h"
#include "talk/base/stringutils.h"
#include "talk/media/base/videocapturer.h"
#include "talk/media/base/videorenderer.h"
#include "talk/media/webrtc/webrtcvideocapturer.h"
#include "talk/media/webrtc/webrtcvideoframe.h"
#include "talk/media/webrtc/webrtcvoiceengine.h"
#include "webrtc/call.h"
// TODO(pbos): Move codecs out of modules (webrtc:3070).
#include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
#define UNIMPLEMENTED \
LOG(LS_ERROR) << "Call to unimplemented function " << __FUNCTION__; \
ASSERT(false)
namespace cricket {
static const int kCpuMonitorPeriodMs = 2000; // 2 seconds.
// This constant is really an on/off, lower-level configurable NACK history
// duration hasn't been implemented.
static const int kNackHistoryMs = 1000;
static const int kDefaultFramerate = 30;
static const int kMinVideoBitrate = 50;
static const int kMaxVideoBitrate = 2000;
static const int kVideoMtu = 1200;
static const int kVideoRtpBufferSize = 65536;
static const char kVp8PayloadName[] = "VP8";
static const int kDefaultRtcpReceiverReportSsrc = 1;
struct VideoCodecPref {
int payload_type;
const char* name;
int rtx_payload_type;
} kDefaultVideoCodecPref = {100, kVp8PayloadName, 96};
VideoCodecPref kRedPref = {116, kRedCodecName, -1};
VideoCodecPref kUlpfecPref = {117, kUlpfecCodecName, -1};
// The formats are sorted by the descending order of width. We use the order to
// find the next format for CPU and bandwidth adaptation.
const VideoFormatPod kDefaultVideoFormat = {
640, 400, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY};
const VideoFormatPod kVideoFormats[] = {
{1280, 800, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{1280, 720, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{960, 600, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{960, 540, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
kDefaultVideoFormat,
{640, 360, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{640, 480, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{480, 300, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{480, 270, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{480, 360, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{320, 200, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{320, 180, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{320, 240, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{240, 150, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{240, 135, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{240, 180, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{160, 100, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{160, 90, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY},
{160, 120, FPS_TO_INTERVAL(kDefaultFramerate), FOURCC_ANY}, };
static bool FindFirstMatchingCodec(const std::vector<VideoCodec>& codecs,
const VideoCodec& requested_codec,
VideoCodec* matching_codec) {
for (size_t i = 0; i < codecs.size(); ++i) {
if (requested_codec.Matches(codecs[i])) {
*matching_codec = codecs[i];
return true;
}
}
return false;
}
static bool FindBestVideoFormat(int max_width,
int max_height,
int aspect_width,
int aspect_height,
VideoFormat* video_format) {
assert(max_width > 0);
assert(max_height > 0);
assert(aspect_width > 0);
assert(aspect_height > 0);
VideoFormat best_format;
for (int i = 0; i < ARRAY_SIZE(kVideoFormats); ++i) {
const VideoFormat format(kVideoFormats[i]);
// Skip any format that is larger than the local or remote maximums, or
// smaller than the current best match
if (format.width > max_width || format.height > max_height ||
(format.width < best_format.width &&
format.height < best_format.height)) {
continue;
}
// If we don't have any matches yet, this is the best so far.
if (best_format.width == 0) {
best_format = format;
continue;
}
// Prefer closer aspect ratios i.e:
// |format| aspect - requested aspect <
// |best_format| aspect - requested aspect
if (abs(format.width * aspect_height * best_format.height -
aspect_width * format.height * best_format.height) <
abs(best_format.width * aspect_height * format.height -
aspect_width * format.height * best_format.height)) {
best_format = format;
}
}
if (best_format.width != 0) {
*video_format = best_format;
return true;
}
return false;
}
static VideoCodec DefaultVideoCodec() {
VideoCodec default_codec(kDefaultVideoCodecPref.payload_type,
kDefaultVideoCodecPref.name,
kDefaultVideoFormat.width,
kDefaultVideoFormat.height,
kDefaultFramerate,
0);
return default_codec;
}
static VideoCodec DefaultRedCodec() {
return VideoCodec(kRedPref.payload_type, kRedPref.name, 0, 0, 0, 0);
}
static VideoCodec DefaultUlpfecCodec() {
return VideoCodec(kUlpfecPref.payload_type, kUlpfecPref.name, 0, 0, 0, 0);
}
static std::vector<VideoCodec> DefaultVideoCodecs() {
std::vector<VideoCodec> codecs;
codecs.push_back(DefaultVideoCodec());
codecs.push_back(DefaultRedCodec());
codecs.push_back(DefaultUlpfecCodec());
if (kDefaultVideoCodecPref.rtx_payload_type != -1) {
codecs.push_back(
VideoCodec::CreateRtxCodec(kDefaultVideoCodecPref.rtx_payload_type,
kDefaultVideoCodecPref.payload_type));
}
return codecs;
}
class DefaultVideoEncoderFactory : public WebRtcVideoEncoderFactory2 {
public:
virtual bool CreateEncoderSettings(
webrtc::VideoSendStream::Config::EncoderSettings* encoder_settings,
const VideoOptions& options,
const VideoCodec& codec,
size_t num_streams) OVERRIDE {
if (num_streams != 1) {
LOG(LS_ERROR) << "Unsupported number of streams: " << num_streams;
return false;
}
if (!SupportsCodec(codec)) {
LOG(LS_ERROR) << "Can't create encoder settings for unsupported codec: '"
<< codec.name << "'";
return false;
}
*encoder_settings = webrtc::VideoSendStream::Config::EncoderSettings();
webrtc::VideoStream stream;
stream.width = codec.width;
stream.height = codec.height;
stream.max_framerate =
codec.framerate != 0 ? codec.framerate : kDefaultFramerate;
int min_bitrate = kMinVideoBitrate;
codec.GetParam(kCodecParamMinBitrate, &min_bitrate);
int max_bitrate = kMaxVideoBitrate;
codec.GetParam(kCodecParamMaxBitrate, &max_bitrate);
stream.min_bitrate_bps = min_bitrate * 1000;
stream.target_bitrate_bps = stream.max_bitrate_bps = max_bitrate * 1000;
int max_qp = 56;
codec.GetParam(kCodecParamMaxQuantization, &max_qp);
stream.max_qp = max_qp;
encoder_settings->streams.push_back(stream);
encoder_settings->encoder = webrtc::VP8Encoder::Create();
encoder_settings->payload_type = kDefaultVideoCodecPref.payload_type;
encoder_settings->payload_name = kDefaultVideoCodecPref.name;
return true;
}
virtual bool SupportsCodec(const VideoCodec& codec) OVERRIDE {
return _stricmp(codec.name.c_str(), kVp8PayloadName) == 0;
}
} default_encoder_factory;
WebRtcVideoEngine2::WebRtcVideoEngine2() {
// Construct without a factory or voice engine.
Construct(NULL, NULL, new talk_base::CpuMonitor(NULL));
}
WebRtcVideoEngine2::WebRtcVideoEngine2(
WebRtcVideoChannelFactory* channel_factory) {
// Construct without a voice engine.
Construct(channel_factory, NULL, new talk_base::CpuMonitor(NULL));
}
void WebRtcVideoEngine2::Construct(WebRtcVideoChannelFactory* channel_factory,
WebRtcVoiceEngine* voice_engine,
talk_base::CpuMonitor* cpu_monitor) {
LOG(LS_INFO) << "WebRtcVideoEngine2::WebRtcVideoEngine2";
worker_thread_ = NULL;
voice_engine_ = voice_engine;
initialized_ = false;
capture_started_ = false;
cpu_monitor_.reset(cpu_monitor);
channel_factory_ = channel_factory;
video_codecs_ = DefaultVideoCodecs();
default_codec_format_ = VideoFormat(kDefaultVideoFormat);
}
WebRtcVideoEngine2::~WebRtcVideoEngine2() {
LOG(LS_INFO) << "WebRtcVideoEngine2::~WebRtcVideoEngine2";
if (initialized_) {
Terminate();
}
}
bool WebRtcVideoEngine2::Init(talk_base::Thread* worker_thread) {
LOG(LS_INFO) << "WebRtcVideoEngine2::Init";
worker_thread_ = worker_thread;
ASSERT(worker_thread_ != NULL);
cpu_monitor_->set_thread(worker_thread_);
if (!cpu_monitor_->Start(kCpuMonitorPeriodMs)) {
LOG(LS_ERROR) << "Failed to start CPU monitor.";
cpu_monitor_.reset();
}
initialized_ = true;
return true;
}
void WebRtcVideoEngine2::Terminate() {
LOG(LS_INFO) << "WebRtcVideoEngine2::Terminate";
cpu_monitor_->Stop();
initialized_ = false;
}
int WebRtcVideoEngine2::GetCapabilities() { return VIDEO_RECV | VIDEO_SEND; }
bool WebRtcVideoEngine2::SetOptions(const VideoOptions& options) {
// TODO(pbos): Do we need this? This is a no-op in the existing
// WebRtcVideoEngine implementation.
LOG(LS_VERBOSE) << "SetOptions: " << options.ToString();
// options_ = options;
return true;
}
bool WebRtcVideoEngine2::SetDefaultEncoderConfig(
const VideoEncoderConfig& config) {
// TODO(pbos): Implement. Should be covered by corresponding unit tests.
LOG(LS_VERBOSE) << "SetDefaultEncoderConfig()";
return true;
}
VideoEncoderConfig WebRtcVideoEngine2::GetDefaultEncoderConfig() const {
return VideoEncoderConfig(DefaultVideoCodec());
}
WebRtcVideoChannel2* WebRtcVideoEngine2::CreateChannel(
VoiceMediaChannel* voice_channel) {
LOG(LS_INFO) << "CreateChannel: "
<< (voice_channel != NULL ? "With" : "Without")
<< " voice channel.";
WebRtcVideoChannel2* channel =
channel_factory_ != NULL
? channel_factory_->Create(this, voice_channel)
: new WebRtcVideoChannel2(
this, voice_channel, GetDefaultVideoEncoderFactory());
if (!channel->Init()) {
delete channel;
return NULL;
}
return channel;
}
const std::vector<VideoCodec>& WebRtcVideoEngine2::codecs() const {
return video_codecs_;
}
const std::vector<RtpHeaderExtension>&
WebRtcVideoEngine2::rtp_header_extensions() const {
return rtp_header_extensions_;
}
void WebRtcVideoEngine2::SetLogging(int min_sev, const char* filter) {
// TODO(pbos): Set up logging.
LOG(LS_VERBOSE) << "SetLogging: " << min_sev << '"' << filter << '"';
// if min_sev == -1, we keep the current log level.
if (min_sev < 0) {
assert(min_sev == -1);
return;
}
}
bool WebRtcVideoEngine2::EnableTimedRender() {
// TODO(pbos): Figure out whether this can be removed.
return true;
}
bool WebRtcVideoEngine2::SetLocalRenderer(VideoRenderer* renderer) {
// TODO(pbos): Implement or remove. Unclear which stream should be rendered
// locally even.
return true;
}
// Checks to see whether we comprehend and could receive a particular codec
bool WebRtcVideoEngine2::FindCodec(const VideoCodec& in) {
// TODO(pbos): Probe encoder factory to figure out that the codec is supported
// if supported by the encoder factory. Add a corresponding test that fails
// with this code (that doesn't ask the factory).
for (int i = 0; i < ARRAY_SIZE(kVideoFormats); ++i) {
const VideoFormat fmt(kVideoFormats[i]);
if ((in.width != 0 || in.height != 0) &&
(fmt.width != in.width || fmt.height != in.height)) {
continue;
}
for (size_t j = 0; j < video_codecs_.size(); ++j) {
VideoCodec codec(video_codecs_[j].id, video_codecs_[j].name, 0, 0, 0, 0);
if (codec.Matches(in)) {
return true;
}
}
}
return false;
}
// Tells whether the |requested| codec can be transmitted or not. If it can be
// transmitted |out| is set with the best settings supported. Aspect ratio will
// be set as close to |current|'s as possible. If not set |requested|'s
// dimensions will be used for aspect ratio matching.
bool WebRtcVideoEngine2::CanSendCodec(const VideoCodec& requested,
const VideoCodec& current,
VideoCodec* out) {
assert(out != NULL);
// TODO(pbos): Implement.
if (requested.width != requested.height &&
(requested.height == 0 || requested.width == 0)) {
// 0xn and nx0 are invalid resolutions.
return false;
}
VideoCodec matching_codec;
if (!FindFirstMatchingCodec(video_codecs_, requested, &matching_codec)) {
// Codec not supported.
return false;
}
// Pick the best quality that is within their and our bounds and has the
// correct aspect ratio.
VideoFormat format;
if (requested.width == 0 && requested.height == 0) {
// Special case with resolution 0. The channel should not send frames.
} else {
int max_width = talk_base::_min(requested.width, matching_codec.width);
int max_height = talk_base::_min(requested.height, matching_codec.height);
int aspect_width = max_width;
int aspect_height = max_height;
if (current.width > 0 && current.height > 0) {
aspect_width = current.width;
aspect_height = current.height;
}
if (!FindBestVideoFormat(
max_width, max_height, aspect_width, aspect_height, &format)) {
return false;
}
}
out->id = requested.id;
out->name = requested.name;
out->preference = requested.preference;
out->params = requested.params;
out->framerate =
talk_base::_min(requested.framerate, matching_codec.framerate);
out->width = format.width;
out->height = format.height;
out->params = requested.params;
out->feedback_params = requested.feedback_params;
return true;
}
bool WebRtcVideoEngine2::SetVoiceEngine(WebRtcVoiceEngine* voice_engine) {
if (initialized_) {
LOG(LS_WARNING) << "SetVoiceEngine can not be called after Init";
return false;
}
voice_engine_ = voice_engine;
return true;
}
// Ignore spammy trace messages, mostly from the stats API when we haven't
// gotten RTCP info yet from the remote side.
bool WebRtcVideoEngine2::ShouldIgnoreTrace(const std::string& trace) {
static const char* const kTracesToIgnore[] = {NULL};
for (const char* const* p = kTracesToIgnore; *p; ++p) {
if (trace.find(*p) == 0) {
return true;
}
}
return false;
}
WebRtcVideoEncoderFactory2* WebRtcVideoEngine2::GetDefaultVideoEncoderFactory()
const {
return &default_encoder_factory;
}
// Thin map between cricket::VideoFrame and an existing webrtc::I420VideoFrame
// to avoid having to copy the rendered VideoFrame prematurely.
// This implementation is only safe to use in a const context and should never
// be written to.
class WebRtcVideoRenderFrame : public cricket::VideoFrame {
public:
explicit WebRtcVideoRenderFrame(const webrtc::I420VideoFrame* frame)
: frame_(frame) {}
virtual bool InitToBlack(int w,
int h,
size_t pixel_width,
size_t pixel_height,
int64 elapsed_time,
int64 time_stamp) OVERRIDE {
UNIMPLEMENTED;
return false;
}
virtual bool Reset(uint32 fourcc,
int w,
int h,
int dw,
int dh,
uint8* sample,
size_t sample_size,
size_t pixel_width,
size_t pixel_height,
int64 elapsed_time,
int64 time_stamp,
int rotation) OVERRIDE {
UNIMPLEMENTED;
return false;
}
virtual size_t GetWidth() const OVERRIDE {
return static_cast<size_t>(frame_->width());
}
virtual size_t GetHeight() const OVERRIDE {
return static_cast<size_t>(frame_->height());
}
virtual const uint8* GetYPlane() const OVERRIDE {
return frame_->buffer(webrtc::kYPlane);
}
virtual const uint8* GetUPlane() const OVERRIDE {
return frame_->buffer(webrtc::kUPlane);
}
virtual const uint8* GetVPlane() const OVERRIDE {
return frame_->buffer(webrtc::kVPlane);
}
virtual uint8* GetYPlane() OVERRIDE {
UNIMPLEMENTED;
return NULL;
}
virtual uint8* GetUPlane() OVERRIDE {
UNIMPLEMENTED;
return NULL;
}
virtual uint8* GetVPlane() OVERRIDE {
UNIMPLEMENTED;
return NULL;
}
virtual int32 GetYPitch() const OVERRIDE {
return frame_->stride(webrtc::kYPlane);
}
virtual int32 GetUPitch() const OVERRIDE {
return frame_->stride(webrtc::kUPlane);
}
virtual int32 GetVPitch() const OVERRIDE {
return frame_->stride(webrtc::kVPlane);
}
virtual void* GetNativeHandle() const OVERRIDE { return NULL; }
virtual size_t GetPixelWidth() const OVERRIDE { return 1; }
virtual size_t GetPixelHeight() const OVERRIDE { return 1; }
virtual int64 GetElapsedTime() const OVERRIDE {
// Convert millisecond render time to ns timestamp.
return frame_->render_time_ms() * talk_base::kNumNanosecsPerMillisec;
}
virtual int64 GetTimeStamp() const OVERRIDE {
// Convert 90K rtp timestamp to ns timestamp.
return (frame_->timestamp() / 90) * talk_base::kNumNanosecsPerMillisec;
}
virtual void SetElapsedTime(int64 elapsed_time) OVERRIDE { UNIMPLEMENTED; }
virtual void SetTimeStamp(int64 time_stamp) OVERRIDE { UNIMPLEMENTED; }
virtual int GetRotation() const OVERRIDE {
UNIMPLEMENTED;
return ROTATION_0;
}
virtual VideoFrame* Copy() const OVERRIDE {
UNIMPLEMENTED;
return NULL;
}
virtual bool MakeExclusive() OVERRIDE {
UNIMPLEMENTED;
return false;
}
virtual size_t CopyToBuffer(uint8* buffer, size_t size) const {
UNIMPLEMENTED;
return 0;
}
// TODO(fbarchard): Refactor into base class and share with LMI
virtual size_t ConvertToRgbBuffer(uint32 to_fourcc,
uint8* buffer,
size_t size,
int stride_rgb) const OVERRIDE {
size_t width = GetWidth();
size_t height = GetHeight();
size_t needed = (stride_rgb >= 0 ? stride_rgb : -stride_rgb) * height;
if (size < needed) {
LOG(LS_WARNING) << "RGB buffer is not large enough";
return needed;
}
if (libyuv::ConvertFromI420(GetYPlane(),
GetYPitch(),
GetUPlane(),
GetUPitch(),
GetVPlane(),
GetVPitch(),
buffer,
stride_rgb,
static_cast<int>(width),
static_cast<int>(height),
to_fourcc)) {
LOG(LS_ERROR) << "RGB type not supported: " << to_fourcc;
return 0; // 0 indicates error
}
return needed;
}
protected:
virtual VideoFrame* CreateEmptyFrame(int w,
int h,
size_t pixel_width,
size_t pixel_height,
int64 elapsed_time,
int64 time_stamp) const OVERRIDE {
// TODO(pbos): Remove WebRtcVideoFrame dependency, and have a non-const
// version of I420VideoFrame wrapped.
WebRtcVideoFrame* frame = new WebRtcVideoFrame();
frame->InitToBlack(
w, h, pixel_width, pixel_height, elapsed_time, time_stamp);
return frame;
}
private:
const webrtc::I420VideoFrame* const frame_;
};
WebRtcVideoRenderer::WebRtcVideoRenderer()
: last_width_(-1), last_height_(-1), renderer_(NULL) {}
void WebRtcVideoRenderer::RenderFrame(const webrtc::I420VideoFrame& frame,
int time_to_render_ms) {
talk_base::CritScope crit(&lock_);
if (renderer_ == NULL) {
LOG(LS_WARNING) << "VideoReceiveStream not connected to a VideoRenderer.";
return;
}
if (frame.width() != last_width_ || frame.height() != last_height_) {
SetSize(frame.width(), frame.height());
}
LOG(LS_VERBOSE) << "RenderFrame: (" << frame.width() << "x" << frame.height()
<< ")";
const WebRtcVideoRenderFrame render_frame(&frame);
renderer_->RenderFrame(&render_frame);
}
void WebRtcVideoRenderer::SetRenderer(cricket::VideoRenderer* renderer) {
talk_base::CritScope crit(&lock_);
renderer_ = renderer;
if (renderer_ != NULL && last_width_ != -1) {
SetSize(last_width_, last_height_);
}
}
VideoRenderer* WebRtcVideoRenderer::GetRenderer() {
talk_base::CritScope crit(&lock_);
return renderer_;
}
void WebRtcVideoRenderer::SetSize(int width, int height) {
talk_base::CritScope crit(&lock_);
if (!renderer_->SetSize(width, height, 0)) {
LOG(LS_ERROR) << "Could not set renderer size.";
}
last_width_ = width;
last_height_ = height;
}
// WebRtcVideoChannel2
WebRtcVideoChannel2::WebRtcVideoChannel2(
WebRtcVideoEngine2* engine,
VoiceMediaChannel* voice_channel,
WebRtcVideoEncoderFactory2* encoder_factory)
: encoder_factory_(encoder_factory) {
// TODO(pbos): Connect the video and audio with |voice_channel|.
webrtc::Call::Config config(this);
Construct(webrtc::Call::Create(config), engine);
}
WebRtcVideoChannel2::WebRtcVideoChannel2(
webrtc::Call* call,
WebRtcVideoEngine2* engine,
WebRtcVideoEncoderFactory2* encoder_factory)
: encoder_factory_(encoder_factory) {
Construct(call, engine);
}
void WebRtcVideoChannel2::Construct(webrtc::Call* call,
WebRtcVideoEngine2* engine) {
rtcp_receiver_report_ssrc_ = kDefaultRtcpReceiverReportSsrc;
sending_ = false;
call_.reset(call);
default_renderer_ = NULL;
default_send_ssrc_ = 0;
default_recv_ssrc_ = 0;
}
WebRtcVideoChannel2::~WebRtcVideoChannel2() {
for (std::map<uint32, WebRtcVideoSendStream*>::iterator it =
send_streams_.begin();
it != send_streams_.end();
++it) {
delete it->second;
}
for (std::map<uint32, webrtc::VideoReceiveStream*>::iterator it =
receive_streams_.begin();
it != receive_streams_.end();
++it) {
assert(it->second != NULL);
call_->DestroyVideoReceiveStream(it->second);
}
for (std::map<uint32, WebRtcVideoRenderer*>::iterator it = renderers_.begin();
it != renderers_.end();
++it) {
assert(it->second != NULL);
delete it->second;
}
}
bool WebRtcVideoChannel2::Init() { return true; }
namespace {
static bool ValidateCodecFormats(const std::vector<VideoCodec>& codecs) {
for (size_t i = 0; i < codecs.size(); ++i) {
if (!codecs[i].ValidateCodecFormat()) {
return false;
}
}
return true;
}
static std::string CodecVectorToString(const std::vector<VideoCodec>& codecs) {
std::stringstream out;
out << '{';
for (size_t i = 0; i < codecs.size(); ++i) {
out << codecs[i].ToString();
if (i != codecs.size() - 1) {
out << ", ";
}
}
out << '}';
return out.str();
}
} // namespace
bool WebRtcVideoChannel2::SetRecvCodecs(const std::vector<VideoCodec>& codecs) {
// TODO(pbos): Must these receive codecs propagate to existing receive
// streams?
LOG(LS_INFO) << "SetRecvCodecs: " << CodecVectorToString(codecs);
if (!ValidateCodecFormats(codecs)) {
return false;
}
const std::vector<VideoCodecSettings> mapped_codecs = MapCodecs(codecs);
if (mapped_codecs.empty()) {
LOG(LS_ERROR) << "SetRecvCodecs called without video codec payloads.";
return false;
}
// TODO(pbos): Add a decoder factory which controls supported codecs.
// Blocked on webrtc:2854.
for (size_t i = 0; i < mapped_codecs.size(); ++i) {
if (_stricmp(mapped_codecs[i].codec.name.c_str(), kVp8PayloadName) != 0) {
LOG(LS_ERROR) << "SetRecvCodecs called with unsupported codec: '"
<< mapped_codecs[i].codec.name << "'";
return false;
}
}
recv_codecs_ = mapped_codecs;
return true;
}
bool WebRtcVideoChannel2::SetSendCodecs(const std::vector<VideoCodec>& codecs) {
LOG(LS_INFO) << "SetSendCodecs: " << CodecVectorToString(codecs);
if (!ValidateCodecFormats(codecs)) {
return false;
}
const std::vector<VideoCodecSettings> supported_codecs =
FilterSupportedCodecs(MapCodecs(codecs));
if (supported_codecs.empty()) {
LOG(LS_ERROR) << "No video codecs supported by encoder factory.";
return false;
}
send_codec_.Set(supported_codecs.front());
LOG(LS_INFO) << "Using codec: " << supported_codecs.front().codec.ToString();
SetCodecForAllSendStreams(supported_codecs.front());
return true;
}
bool WebRtcVideoChannel2::GetSendCodec(VideoCodec* codec) {
VideoCodecSettings codec_settings;
if (!send_codec_.Get(&codec_settings)) {
LOG(LS_VERBOSE) << "GetSendCodec: No send codec set.";
return false;
}
*codec = codec_settings.codec;
return true;
}
bool WebRtcVideoChannel2::SetSendStreamFormat(uint32 ssrc,
const VideoFormat& format) {
LOG(LS_VERBOSE) << "SetSendStreamFormat:" << ssrc << " -> "
<< format.ToString();
if (send_streams_.find(ssrc) == send_streams_.end()) {
return false;
}
return send_streams_[ssrc]->SetVideoFormat(format);
}
bool WebRtcVideoChannel2::SetRender(bool render) {
// TODO(pbos): Implement. Or refactor away as it shouldn't be needed.
LOG(LS_VERBOSE) << "SetRender: " << (render ? "true" : "false");
return true;
}
bool WebRtcVideoChannel2::SetSend(bool send) {
LOG(LS_VERBOSE) << "SetSend: " << (send ? "true" : "false");
if (send && !send_codec_.IsSet()) {
LOG(LS_ERROR) << "SetSend(true) called before setting codec.";
return false;
}
if (send) {
StartAllSendStreams();
} else {
StopAllSendStreams();
}
sending_ = send;
return true;
}
static bool ConfigureSendSsrcs(webrtc::VideoSendStream::Config* config,
const StreamParams& sp) {
if (!sp.has_ssrc_groups()) {
config->rtp.ssrcs = sp.ssrcs;
return true;
}
if (sp.get_ssrc_group(kFecSsrcGroupSemantics) != NULL) {
LOG(LS_ERROR) << "Standalone FEC SSRCs not supported.";
return false;
}
const SsrcGroup* sim_group = sp.get_ssrc_group(kSimSsrcGroupSemantics);
if (sim_group == NULL) {
LOG(LS_ERROR) << "Grouped StreamParams without regular SSRC group: "
<< sp.ToString();
return false;
}
// Map RTX SSRCs.
std::vector<uint32_t> rtx_ssrcs;
for (size_t i = 0; i < sim_group->ssrcs.size(); ++i) {
uint32_t rtx_ssrc;
if (!sp.GetFidSsrc(sim_group->ssrcs[i], &rtx_ssrc)) {
continue;
}
rtx_ssrcs.push_back(rtx_ssrc);
}
if (!rtx_ssrcs.empty() && sim_group->ssrcs.size() != rtx_ssrcs.size()) {
LOG(LS_ERROR)
<< "RTX SSRCs exist, but don't cover all SSRCs (unsupported): "
<< sp.ToString();
return false;
}
config->rtp.rtx.ssrcs = rtx_ssrcs;
config->rtp.ssrcs = sim_group->ssrcs;
return true;
}
bool WebRtcVideoChannel2::AddSendStream(const StreamParams& sp) {
LOG(LS_INFO) << "AddSendStream: " << sp.ToString();
if (sp.ssrcs.empty()) {
LOG(LS_ERROR) << "No SSRCs in stream parameters.";
return false;
}
uint32 ssrc = sp.first_ssrc();
assert(ssrc != 0);
// TODO(pbos): Make sure none of sp.ssrcs are used, not just the identifying
// ssrc.
if (send_streams_.find(ssrc) != send_streams_.end()) {
LOG(LS_ERROR) << "Send stream with ssrc '" << ssrc << "' already exists.";
return false;
}
webrtc::VideoSendStream::Config config = call_->GetDefaultSendConfig();
if (!ConfigureSendSsrcs(&config, sp)) {
return false;
}
VideoCodecSettings codec_settings;
if (!send_codec_.Get(&codec_settings)) {
// TODO(pbos): Set up a temporary fake encoder for VideoSendStream instead
// of setting default codecs not to break CreateEncoderSettings.
SetSendCodecs(DefaultVideoCodecs());
assert(send_codec_.IsSet());
send_codec_.Get(&codec_settings);
// This is only to bring up defaults to make VideoSendStream setup easier
// and avoid complexity. We still don't want to allow sending with the
// default codec.
send_codec_.Clear();
}
// CreateEncoderSettings will allocate a suitable VideoEncoder instance
// matching current settings.
if (!encoder_factory_->CreateEncoderSettings(&config.encoder_settings,
options_,
codec_settings.codec,
config.rtp.ssrcs.size())) {
LOG(LS_ERROR) << "Failed to create suitable encoder settings.";
return false;
}
config.rtp.c_name = sp.cname;
config.rtp.fec = codec_settings.fec;
if (!config.rtp.rtx.ssrcs.empty()) {
config.rtp.rtx.payload_type = codec_settings.rtx_payload_type;
}
config.rtp.nack.rtp_history_ms = kNackHistoryMs;
config.rtp.max_packet_size = kVideoMtu;
WebRtcVideoSendStream* stream =
new WebRtcVideoSendStream(call_.get(), config, encoder_factory_);
send_streams_[ssrc] = stream;
if (rtcp_receiver_report_ssrc_ == kDefaultRtcpReceiverReportSsrc) {
rtcp_receiver_report_ssrc_ = ssrc;
}
if (default_send_ssrc_ == 0) {
default_send_ssrc_ = ssrc;
}
if (sending_) {
stream->Start();
}
return true;
}
bool WebRtcVideoChannel2::RemoveSendStream(uint32 ssrc) {
LOG(LS_INFO) << "RemoveSendStream: " << ssrc;
if (ssrc == 0) {
if (default_send_ssrc_ == 0) {
LOG(LS_ERROR) << "No default send stream active.";
return false;
}
LOG(LS_VERBOSE) << "Removing default stream: " << default_send_ssrc_;
ssrc = default_send_ssrc_;
}
std::map<uint32, WebRtcVideoSendStream*>::iterator it =
send_streams_.find(ssrc);
if (it == send_streams_.end()) {
return false;
}
delete it->second;
send_streams_.erase(it);
if (ssrc == default_send_ssrc_) {
default_send_ssrc_ = 0;
}
return true;
}
bool WebRtcVideoChannel2::AddRecvStream(const StreamParams& sp) {
LOG(LS_INFO) << "AddRecvStream: " << sp.ToString();
assert(sp.ssrcs.size() > 0);
uint32 ssrc = sp.first_ssrc();
assert(ssrc != 0); // TODO(pbos): Is this ever valid?
if (default_recv_ssrc_ == 0) {
default_recv_ssrc_ = ssrc;
}
// TODO(pbos): Check if any of the SSRCs overlap.
if (receive_streams_.find(ssrc) != receive_streams_.end()) {
LOG(LS_ERROR) << "Receive stream for SSRC " << ssrc << "already exists.";
return false;
}
webrtc::VideoReceiveStream::Config config = call_->GetDefaultReceiveConfig();
config.rtp.remote_ssrc = ssrc;
config.rtp.local_ssrc = rtcp_receiver_report_ssrc_;
uint32 rtx_ssrc = 0;
if (sp.GetFidSsrc(ssrc, &rtx_ssrc)) {
// TODO(pbos): Right now, VideoReceiveStream accepts any rtx payload, this
// should use the actual codec payloads that may be received.
// (for each receive payload, set rtx[payload].ssrc = rtx_ssrc.
config.rtp.rtx[0].ssrc = rtx_ssrc;
}
config.rtp.remb = true;
// TODO(pbos): This protection is against setting the same local ssrc as
// remote which is not permitted by the lower-level API. RTCP requires a
// corresponding sender SSRC. Figure out what to do when we don't have
// (receive-only) or know a good local SSRC.
if (config.rtp.remote_ssrc == config.rtp.local_ssrc) {
if (config.rtp.local_ssrc != kDefaultRtcpReceiverReportSsrc) {
config.rtp.local_ssrc = kDefaultRtcpReceiverReportSsrc;
} else {
config.rtp.local_ssrc = kDefaultRtcpReceiverReportSsrc + 1;
}
}
bool default_renderer_used = false;
for (std::map<uint32, WebRtcVideoRenderer*>::iterator it = renderers_.begin();
it != renderers_.end();
++it) {
if (it->second->GetRenderer() == default_renderer_) {
default_renderer_used = true;
break;
}
}
assert(renderers_[ssrc] == NULL);
renderers_[ssrc] = new WebRtcVideoRenderer();
if (!default_renderer_used) {
renderers_[ssrc]->SetRenderer(default_renderer_);
}
config.renderer = renderers_[ssrc];
{
// TODO(pbos): Base receive codecs off recv_codecs_ and set up using a
// DecoderFactory similar to send side. Pending webrtc:2854.
// Also set up default codecs if there's nothing in recv_codecs_.
webrtc::VideoCodec codec;
memset(&codec, 0, sizeof(codec));
codec.plType = kDefaultVideoCodecPref.payload_type;
strcpy(codec.plName, kDefaultVideoCodecPref.name);
codec.codecType = webrtc::kVideoCodecVP8;
codec.codecSpecific.VP8.resilience = webrtc::kResilientStream;
codec.codecSpecific.VP8.numberOfTemporalLayers = 1;
codec.codecSpecific.VP8.denoisingOn = true;
codec.codecSpecific.VP8.errorConcealmentOn = false;
codec.codecSpecific.VP8.automaticResizeOn = false;
codec.codecSpecific.VP8.frameDroppingOn = true;
codec.codecSpecific.VP8.keyFrameInterval = 3000;
// Bitrates don't matter and are ignored for the receiver. This is put in to
// have the current underlying implementation accept the VideoCodec.
codec.minBitrate = codec.startBitrate = codec.maxBitrate = 300;
config.codecs.push_back(codec);
for (size_t i = 0; i < recv_codecs_.size(); ++i) {
if (recv_codecs_[i].codec.id == codec.plType) {
config.rtp.fec = recv_codecs_[i].fec;
if (recv_codecs_[i].rtx_payload_type != -1 && rtx_ssrc != 0) {
config.rtp.rtx[codec.plType].ssrc = rtx_ssrc;
config.rtp.rtx[codec.plType].payload_type =
recv_codecs_[i].rtx_payload_type;
}
break;
}
}
}
webrtc::VideoReceiveStream* receive_stream =
call_->CreateVideoReceiveStream(config);
assert(receive_stream != NULL);
receive_streams_[ssrc] = receive_stream;
receive_stream->Start();
return true;
}
bool WebRtcVideoChannel2::RemoveRecvStream(uint32 ssrc) {
LOG(LS_INFO) << "RemoveRecvStream: " << ssrc;
if (ssrc == 0) {
ssrc = default_recv_ssrc_;
}
std::map<uint32, webrtc::VideoReceiveStream*>::iterator stream =
receive_streams_.find(ssrc);
if (stream == receive_streams_.end()) {
LOG(LS_ERROR) << "Stream not found for ssrc: " << ssrc;
return false;
}
call_->DestroyVideoReceiveStream(stream->second);
receive_streams_.erase(stream);
std::map<uint32, WebRtcVideoRenderer*>::iterator renderer =
renderers_.find(ssrc);
assert(renderer != renderers_.end());
delete renderer->second;
renderers_.erase(renderer);
if (ssrc == default_recv_ssrc_) {
default_recv_ssrc_ = 0;
}
return true;
}
bool WebRtcVideoChannel2::SetRenderer(uint32 ssrc, VideoRenderer* renderer) {
LOG(LS_INFO) << "SetRenderer: ssrc:" << ssrc << " "
<< (renderer ? "(ptr)" : "NULL");
bool is_default_ssrc = false;
if (ssrc == 0) {
is_default_ssrc = true;
ssrc = default_recv_ssrc_;
default_renderer_ = renderer;
}
std::map<uint32, WebRtcVideoRenderer*>::iterator it = renderers_.find(ssrc);
if (it == renderers_.end()) {
return is_default_ssrc;
}
it->second->SetRenderer(renderer);
return true;
}
bool WebRtcVideoChannel2::GetRenderer(uint32 ssrc, VideoRenderer** renderer) {
if (ssrc == 0) {
if (default_renderer_ == NULL) {
return false;
}
*renderer = default_renderer_;
return true;
}
std::map<uint32, WebRtcVideoRenderer*>::iterator it = renderers_.find(ssrc);
if (it == renderers_.end()) {
return false;
}
*renderer = it->second->GetRenderer();
return true;
}
bool WebRtcVideoChannel2::GetStats(const StatsOptions& options,
VideoMediaInfo* info) {
// TODO(pbos): Implement.
return true;
}
bool WebRtcVideoChannel2::SetCapturer(uint32 ssrc, VideoCapturer* capturer) {
LOG(LS_INFO) << "SetCapturer: " << ssrc << " -> "
<< (capturer != NULL ? "(capturer)" : "NULL");
assert(ssrc != 0);
if (send_streams_.find(ssrc) == send_streams_.end()) {
LOG(LS_ERROR) << "No sending stream on ssrc " << ssrc;
return false;
}
return send_streams_[ssrc]->SetCapturer(capturer);
}
bool WebRtcVideoChannel2::SendIntraFrame() {
// TODO(pbos): Implement.
LOG(LS_VERBOSE) << "SendIntraFrame().";
return true;
}
bool WebRtcVideoChannel2::RequestIntraFrame() {
// TODO(pbos): Implement.
LOG(LS_VERBOSE) << "SendIntraFrame().";
return true;
}
void WebRtcVideoChannel2::OnPacketReceived(
talk_base::Buffer* packet,
const talk_base::PacketTime& packet_time) {
if (call_->Receiver()->DeliverPacket(
reinterpret_cast<const uint8_t*>(packet->data()), packet->length())) {
return;
}
// Packet ignored most likely because there's no receiver for it, try to
// create one unless it already exists.
uint32 ssrc = 0;
if (default_recv_ssrc_ != 0) { // Already one default stream.
LOG(LS_WARNING) << "Default receive stream already set.";
return;
}
if (!GetRtpSsrc(packet->data(), packet->length(), &ssrc)) {
return;
}
StreamParams sp;
sp.ssrcs.push_back(ssrc);
AddRecvStream(sp);
if (!call_->Receiver()->DeliverPacket(
reinterpret_cast<const uint8_t*>(packet->data()), packet->length())) {
LOG(LS_WARNING) << "Failed to deliver RTP packet.";
return;
}
}
void WebRtcVideoChannel2::OnRtcpReceived(
talk_base::Buffer* packet,
const talk_base::PacketTime& packet_time) {
if (!call_->Receiver()->DeliverPacket(
reinterpret_cast<const uint8_t*>(packet->data()), packet->length())) {
LOG(LS_WARNING) << "Failed to deliver RTCP packet.";
}
}
void WebRtcVideoChannel2::OnReadyToSend(bool ready) {
LOG(LS_VERBOSE) << "OnReadySend: " << (ready ? "Ready." : "Not ready.");
}
bool WebRtcVideoChannel2::MuteStream(uint32 ssrc, bool mute) {
LOG(LS_VERBOSE) << "MuteStream: " << ssrc << " -> "
<< (mute ? "mute" : "unmute");
assert(ssrc != 0);
if (send_streams_.find(ssrc) == send_streams_.end()) {
LOG(LS_ERROR) << "No sending stream on ssrc " << ssrc;
return false;
}
return send_streams_[ssrc]->MuteStream(mute);
}
bool WebRtcVideoChannel2::SetRecvRtpHeaderExtensions(
const std::vector<RtpHeaderExtension>& extensions) {
// TODO(pbos): Implement.
LOG(LS_VERBOSE) << "SetRecvRtpHeaderExtensions()";
return true;
}
bool WebRtcVideoChannel2::SetSendRtpHeaderExtensions(
const std::vector<RtpHeaderExtension>& extensions) {
// TODO(pbos): Implement.
LOG(LS_VERBOSE) << "SetSendRtpHeaderExtensions()";
return true;
}
bool WebRtcVideoChannel2::SetStartSendBandwidth(int bps) {
// TODO(pbos): Implement.
LOG(LS_VERBOSE) << "SetStartSendBandwidth: " << bps;
return true;
}
bool WebRtcVideoChannel2::SetMaxSendBandwidth(int bps) {
// TODO(pbos): Implement.
LOG(LS_VERBOSE) << "SetMaxSendBandwidth: " << bps;
return true;
}
bool WebRtcVideoChannel2::SetOptions(const VideoOptions& options) {
LOG(LS_VERBOSE) << "SetOptions: " << options.ToString();
options_.SetAll(options);
return true;
}
void WebRtcVideoChannel2::SetInterface(NetworkInterface* iface) {
MediaChannel::SetInterface(iface);
// Set the RTP recv/send buffer to a bigger size
MediaChannel::SetOption(NetworkInterface::ST_RTP,
talk_base::Socket::OPT_RCVBUF,
kVideoRtpBufferSize);
// TODO(sriniv): Remove or re-enable this.
// As part of b/8030474, send-buffer is size now controlled through
// portallocator flags.
// network_interface_->SetOption(NetworkInterface::ST_RTP,
// talk_base::Socket::OPT_SNDBUF,
// kVideoRtpBufferSize);
}
void WebRtcVideoChannel2::UpdateAspectRatio(int ratio_w, int ratio_h) {
// TODO(pbos): Implement.
}
void WebRtcVideoChannel2::OnMessage(talk_base::Message* msg) {
// Ignored.
}
bool WebRtcVideoChannel2::SendRtp(const uint8_t* data, size_t len) {
talk_base::Buffer packet(data, len, kMaxRtpPacketLen);
return MediaChannel::SendPacket(&packet);
}
bool WebRtcVideoChannel2::SendRtcp(const uint8_t* data, size_t len) {
talk_base::Buffer packet(data, len, kMaxRtpPacketLen);
return MediaChannel::SendRtcp(&packet);
}
void WebRtcVideoChannel2::StartAllSendStreams() {
for (std::map<uint32, WebRtcVideoSendStream*>::iterator it =
send_streams_.begin();
it != send_streams_.end();
++it) {
it->second->Start();
}
}
void WebRtcVideoChannel2::StopAllSendStreams() {
for (std::map<uint32, WebRtcVideoSendStream*>::iterator it =
send_streams_.begin();
it != send_streams_.end();
++it) {
it->second->Stop();
}
}
void WebRtcVideoChannel2::SetCodecForAllSendStreams(
const WebRtcVideoChannel2::VideoCodecSettings& codec) {
for (std::map<uint32, WebRtcVideoSendStream*>::iterator it =
send_streams_.begin();
it != send_streams_.end();
++it) {
assert(it->second != NULL);
it->second->SetCodec(options_, codec);
}
}
WebRtcVideoChannel2::WebRtcVideoSendStream::WebRtcVideoSendStream(
webrtc::Call* call,
const webrtc::VideoSendStream::Config& config,
WebRtcVideoEncoderFactory2* encoder_factory)
: call_(call),
config_(config),
encoder_factory_(encoder_factory),
capturer_(NULL),
stream_(NULL),
sending_(false),
muted_(false),
format_(static_cast<int>(config.encoder_settings.streams.back().height),
static_cast<int>(config.encoder_settings.streams.back().width),
VideoFormat::FpsToInterval(
config.encoder_settings.streams.back().max_framerate),
FOURCC_I420) {
RecreateWebRtcStream();
}
WebRtcVideoChannel2::WebRtcVideoSendStream::~WebRtcVideoSendStream() {
DisconnectCapturer();
call_->DestroyVideoSendStream(stream_);
delete config_.encoder_settings.encoder;
}
static void SetWebRtcFrameToBlack(webrtc::I420VideoFrame* video_frame) {
assert(video_frame != NULL);
memset(video_frame->buffer(webrtc::kYPlane),
16,
video_frame->allocated_size(webrtc::kYPlane));
memset(video_frame->buffer(webrtc::kUPlane),
128,
video_frame->allocated_size(webrtc::kUPlane));
memset(video_frame->buffer(webrtc::kVPlane),
128,
video_frame->allocated_size(webrtc::kVPlane));
}
static void CreateBlackFrame(webrtc::I420VideoFrame* video_frame,
int width,
int height) {
video_frame->CreateEmptyFrame(
width, height, width, (width + 1) / 2, (width + 1) / 2);
SetWebRtcFrameToBlack(video_frame);
}
static void ConvertToI420VideoFrame(const VideoFrame& frame,
webrtc::I420VideoFrame* i420_frame) {
i420_frame->CreateFrame(
static_cast<int>(frame.GetYPitch() * frame.GetHeight()),
frame.GetYPlane(),
static_cast<int>(frame.GetUPitch() * ((frame.GetHeight() + 1) / 2)),
frame.GetUPlane(),
static_cast<int>(frame.GetVPitch() * ((frame.GetHeight() + 1) / 2)),
frame.GetVPlane(),
static_cast<int>(frame.GetWidth()),
static_cast<int>(frame.GetHeight()),
static_cast<int>(frame.GetYPitch()),
static_cast<int>(frame.GetUPitch()),
static_cast<int>(frame.GetVPitch()));
}
void WebRtcVideoChannel2::WebRtcVideoSendStream::InputFrame(
VideoCapturer* capturer,
const VideoFrame* frame) {
LOG(LS_VERBOSE) << "InputFrame: " << frame->GetWidth() << "x"
<< frame->GetHeight();
bool is_screencast = capturer->IsScreencast();
// Lock before copying, can be called concurrently when swapping input source.
talk_base::CritScope frame_cs(&frame_lock_);
if (!muted_) {
ConvertToI420VideoFrame(*frame, &video_frame_);
} else {
// Create a tiny black frame to transmit instead.
CreateBlackFrame(&video_frame_, 1, 1);
is_screencast = false;
}
talk_base::CritScope cs(&lock_);
if (format_.width == 0) { // Dropping frames.
assert(format_.height == 0);
LOG(LS_VERBOSE) << "VideoFormat 0x0 set, Dropping frame.";
return;
}
// Reconfigure codec if necessary.
if (is_screencast) {
SetDimensions(video_frame_.width(), video_frame_.height());
}
LOG(LS_VERBOSE) << "SwapFrame: " << video_frame_.width() << "x"
<< video_frame_.height() << " -> (codec) "
<< config_.encoder_settings.streams.back().width << "x"
<< config_.encoder_settings.streams.back().height;
stream_->Input()->SwapFrame(&video_frame_);
}
bool WebRtcVideoChannel2::WebRtcVideoSendStream::SetCapturer(
VideoCapturer* capturer) {
if (!DisconnectCapturer() && capturer == NULL) {
return false;
}
{
talk_base::CritScope cs(&lock_);
if (capturer == NULL) {
LOG(LS_VERBOSE) << "Disabling capturer, sending black frame.";
webrtc::I420VideoFrame black_frame;
int width = format_.width;
int height = format_.height;
int half_width = (width + 1) / 2;
black_frame.CreateEmptyFrame(
width, height, width, half_width, half_width);
SetWebRtcFrameToBlack(&black_frame);
SetDimensions(width, height);
stream_->Input()->SwapFrame(&black_frame);
capturer_ = NULL;
return true;
}
capturer_ = capturer;
}
// Lock cannot be held while connecting the capturer to prevent lock-order
// violations.
capturer->SignalVideoFrame.connect(this, &WebRtcVideoSendStream::InputFrame);
return true;
}
bool WebRtcVideoChannel2::WebRtcVideoSendStream::SetVideoFormat(
const VideoFormat& format) {
if ((format.width == 0 || format.height == 0) &&
format.width != format.height) {
LOG(LS_ERROR) << "Can't set VideoFormat, width or height is zero (but not "
"both, 0x0 drops frames).";
return false;
}
talk_base::CritScope cs(&lock_);
if (format.width == 0 && format.height == 0) {
LOG(LS_INFO)
<< "0x0 resolution selected. Captured frames will be dropped for ssrc: "
<< config_.rtp.ssrcs[0] << ".";
} else {
// TODO(pbos): Fix me, this only affects the last stream!
config_.encoder_settings.streams.back().max_framerate =
VideoFormat::IntervalToFps(format.interval);
SetDimensions(format.width, format.height);
}
format_ = format;
return true;
}
bool WebRtcVideoChannel2::WebRtcVideoSendStream::MuteStream(bool mute) {
talk_base::CritScope cs(&lock_);
bool was_muted = muted_;
muted_ = mute;
return was_muted != mute;
}
bool WebRtcVideoChannel2::WebRtcVideoSendStream::DisconnectCapturer() {
talk_base::CritScope cs(&lock_);
if (capturer_ == NULL) {
return false;
}
capturer_->SignalVideoFrame.disconnect(this);
capturer_ = NULL;
return true;
}
void WebRtcVideoChannel2::WebRtcVideoSendStream::SetCodec(
const VideoOptions& options,
const VideoCodecSettings& codec) {
talk_base::CritScope cs(&lock_);
webrtc::VideoEncoder* old_encoder = config_.encoder_settings.encoder;
if (!encoder_factory_->CreateEncoderSettings(
&config_.encoder_settings,
options,
codec.codec,
config_.encoder_settings.streams.size())) {
LOG(LS_ERROR) << "Could not create encoder settings for: '"
<< codec.codec.name
<< "'. This is most definitely a bug as SetCodec should only "
"receive codecs which the encoder factory claims to "
"support.";
return;
}
format_ = VideoFormat(codec.codec.width,
codec.codec.height,
VideoFormat::FpsToInterval(30),
FOURCC_I420);
config_.rtp.fec = codec.fec;
// TODO(pbos): Should changing RTX payload type be allowed?
RecreateWebRtcStream();
delete old_encoder;
}
void WebRtcVideoChannel2::WebRtcVideoSendStream::SetDimensions(int width,
int height) {
assert(!config_.encoder_settings.streams.empty());
LOG(LS_VERBOSE) << "SetDimensions: " << width << "x" << height;
if (config_.encoder_settings.streams.back().width == width &&
config_.encoder_settings.streams.back().height == height) {
return;
}
// TODO(pbos): Fix me, this only affects the last stream!
config_.encoder_settings.streams.back().width = width;
config_.encoder_settings.streams.back().height = height;
// TODO(pbos): Last parameter shouldn't always be NULL?
if (!stream_->ReconfigureVideoEncoder(config_.encoder_settings.streams,
NULL)) {
LOG(LS_WARNING) << "Failed to reconfigure video encoder for dimensions: "
<< width << "x" << height;
return;
}
}
void WebRtcVideoChannel2::WebRtcVideoSendStream::Start() {
talk_base::CritScope cs(&lock_);
stream_->Start();
sending_ = true;
}
void WebRtcVideoChannel2::WebRtcVideoSendStream::Stop() {
talk_base::CritScope cs(&lock_);
stream_->Stop();
sending_ = false;
}
void WebRtcVideoChannel2::WebRtcVideoSendStream::RecreateWebRtcStream() {
if (stream_ != NULL) {
call_->DestroyVideoSendStream(stream_);
}
stream_ = call_->CreateVideoSendStream(config_);
if (sending_) {
stream_->Start();
}
}
WebRtcVideoChannel2::VideoCodecSettings::VideoCodecSettings()
: rtx_payload_type(-1) {}
std::vector<WebRtcVideoChannel2::VideoCodecSettings>
WebRtcVideoChannel2::MapCodecs(const std::vector<VideoCodec>& codecs) {
assert(!codecs.empty());
std::vector<VideoCodecSettings> video_codecs;
std::map<int, bool> payload_used;
std::map<int, int> rtx_mapping; // video payload type -> rtx payload type.
webrtc::FecConfig fec_settings;
for (size_t i = 0; i < codecs.size(); ++i) {
const VideoCodec& in_codec = codecs[i];
int payload_type = in_codec.id;
if (payload_used[payload_type]) {
LOG(LS_ERROR) << "Payload type already registered: "
<< in_codec.ToString();
return std::vector<VideoCodecSettings>();
}
payload_used[payload_type] = true;
switch (in_codec.GetCodecType()) {
case VideoCodec::CODEC_RED: {
// RED payload type, should not have duplicates.
assert(fec_settings.red_payload_type == -1);
fec_settings.red_payload_type = in_codec.id;
continue;
}
case VideoCodec::CODEC_ULPFEC: {
// ULPFEC payload type, should not have duplicates.
assert(fec_settings.ulpfec_payload_type == -1);
fec_settings.ulpfec_payload_type = in_codec.id;
continue;
}
case VideoCodec::CODEC_RTX: {
int associated_payload_type;
if (!in_codec.GetParam(kCodecParamAssociatedPayloadType,
&associated_payload_type)) {
LOG(LS_ERROR) << "RTX codec without associated payload type: "
<< in_codec.ToString();
return std::vector<VideoCodecSettings>();
}
rtx_mapping[associated_payload_type] = in_codec.id;
continue;
}
case VideoCodec::CODEC_VIDEO:
break;
}
video_codecs.push_back(VideoCodecSettings());
video_codecs.back().codec = in_codec;
}
// One of these codecs should have been a video codec. Only having FEC
// parameters into this code is a logic error.
assert(!video_codecs.empty());
// TODO(pbos): Write tests that figure out that I have not verified that RTX
// codecs aren't mapped to bogus payloads.
for (size_t i = 0; i < video_codecs.size(); ++i) {
video_codecs[i].fec = fec_settings;
if (rtx_mapping[video_codecs[i].codec.id] != 0) {
video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
}
}
return video_codecs;
}
std::vector<WebRtcVideoChannel2::VideoCodecSettings>
WebRtcVideoChannel2::FilterSupportedCodecs(
const std::vector<WebRtcVideoChannel2::VideoCodecSettings>& mapped_codecs) {
std::vector<VideoCodecSettings> supported_codecs;
for (size_t i = 0; i < mapped_codecs.size(); ++i) {
if (encoder_factory_->SupportsCodec(mapped_codecs[i].codec)) {
supported_codecs.push_back(mapped_codecs[i]);
}
}
return supported_codecs;
}
} // namespace cricket
#endif // HAVE_WEBRTC_VIDEO
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