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      1 /*
      2  * libjingle
      3  * Copyright 2010 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_MEDIA_WEBRTC_FAKEWEBRTCVIDEOENGINE_H_
     29 #define TALK_MEDIA_WEBRTC_FAKEWEBRTCVIDEOENGINE_H_
     30 
     31 #include <map>
     32 #include <set>
     33 #include <vector>
     34 
     35 #include "talk/media/base/codec.h"
     36 #include "talk/media/webrtc/fakewebrtccommon.h"
     37 #include "talk/media/webrtc/webrtcvideodecoderfactory.h"
     38 #include "talk/media/webrtc/webrtcvideoencoderfactory.h"
     39 #include "webrtc/base/basictypes.h"
     40 #include "webrtc/base/criticalsection.h"
     41 #include "webrtc/base/gunit.h"
     42 #include "webrtc/base/stringutils.h"
     43 #include "webrtc/base/thread_annotations.h"
     44 #include "webrtc/modules/video_coding/include/video_error_codes.h"
     45 #include "webrtc/video_decoder.h"
     46 #include "webrtc/video_encoder.h"
     47 
     48 namespace cricket {
     49 
     50 static const int kMinVideoBitrate = 100;
     51 static const int kStartVideoBitrate = 300;
     52 static const int kMaxVideoBitrate = 1000;
     53 
     54 // WebRtc channel id and capture id share the same number space.
     55 // This is how AddRenderer(renderId, ...) is able to tell if it is adding a
     56 // renderer for a channel or it is adding a renderer for a capturer.
     57 static const int kViEChannelIdBase = 0;
     58 static const int kViEChannelIdMax = 1000;
     59 
     60 // Fake class for mocking out webrtc::VideoDecoder
     61 class FakeWebRtcVideoDecoder : public webrtc::VideoDecoder {
     62  public:
     63   FakeWebRtcVideoDecoder()
     64       : num_frames_received_(0) {
     65   }
     66 
     67   virtual int32_t InitDecode(const webrtc::VideoCodec*, int32_t) {
     68     return WEBRTC_VIDEO_CODEC_OK;
     69   }
     70 
     71   virtual int32_t Decode(const webrtc::EncodedImage&,
     72                          bool,
     73                          const webrtc::RTPFragmentationHeader*,
     74                          const webrtc::CodecSpecificInfo*,
     75                          int64_t) {
     76     num_frames_received_++;
     77     return WEBRTC_VIDEO_CODEC_OK;
     78   }
     79 
     80   virtual int32_t RegisterDecodeCompleteCallback(
     81       webrtc::DecodedImageCallback*) {
     82     return WEBRTC_VIDEO_CODEC_OK;
     83   }
     84 
     85   virtual int32_t Release() { return WEBRTC_VIDEO_CODEC_OK; }
     86 
     87   virtual int32_t Reset() { return WEBRTC_VIDEO_CODEC_OK; }
     88 
     89   int GetNumFramesReceived() const {
     90     return num_frames_received_;
     91   }
     92 
     93  private:
     94   int num_frames_received_;
     95 };
     96 
     97 // Fake class for mocking out WebRtcVideoDecoderFactory.
     98 class FakeWebRtcVideoDecoderFactory : public WebRtcVideoDecoderFactory {
     99  public:
    100   FakeWebRtcVideoDecoderFactory()
    101       : num_created_decoders_(0) {
    102   }
    103 
    104   virtual webrtc::VideoDecoder* CreateVideoDecoder(
    105       webrtc::VideoCodecType type) {
    106     if (supported_codec_types_.count(type) == 0) {
    107       return NULL;
    108     }
    109     FakeWebRtcVideoDecoder* decoder = new FakeWebRtcVideoDecoder();
    110     decoders_.push_back(decoder);
    111     num_created_decoders_++;
    112     return decoder;
    113   }
    114 
    115   virtual void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) {
    116     decoders_.erase(
    117         std::remove(decoders_.begin(), decoders_.end(), decoder),
    118         decoders_.end());
    119     delete decoder;
    120   }
    121 
    122   void AddSupportedVideoCodecType(webrtc::VideoCodecType type) {
    123     supported_codec_types_.insert(type);
    124   }
    125 
    126   int GetNumCreatedDecoders() {
    127     return num_created_decoders_;
    128   }
    129 
    130   const std::vector<FakeWebRtcVideoDecoder*>& decoders() {
    131     return decoders_;
    132   }
    133 
    134  private:
    135   std::set<webrtc::VideoCodecType> supported_codec_types_;
    136   std::vector<FakeWebRtcVideoDecoder*> decoders_;
    137   int num_created_decoders_;
    138 };
    139 
    140 // Fake class for mocking out webrtc::VideoEnoder
    141 class FakeWebRtcVideoEncoder : public webrtc::VideoEncoder {
    142  public:
    143   FakeWebRtcVideoEncoder() : num_frames_encoded_(0) {}
    144 
    145   virtual int32_t InitEncode(const webrtc::VideoCodec* codecSettings,
    146                              int32_t numberOfCores,
    147                              size_t maxPayloadSize) {
    148     rtc::CritScope lock(&crit_);
    149     codec_settings_ = *codecSettings;
    150     return WEBRTC_VIDEO_CODEC_OK;
    151   }
    152 
    153   webrtc::VideoCodec GetCodecSettings() {
    154     rtc::CritScope lock(&crit_);
    155     return codec_settings_;
    156   }
    157 
    158   virtual int32_t Encode(const webrtc::VideoFrame& inputImage,
    159                          const webrtc::CodecSpecificInfo* codecSpecificInfo,
    160                          const std::vector<webrtc::FrameType>* frame_types) {
    161     rtc::CritScope lock(&crit_);
    162     ++num_frames_encoded_;
    163     return WEBRTC_VIDEO_CODEC_OK;
    164   }
    165 
    166   virtual int32_t RegisterEncodeCompleteCallback(
    167       webrtc::EncodedImageCallback* callback) {
    168     return WEBRTC_VIDEO_CODEC_OK;
    169   }
    170 
    171   virtual int32_t Release() { return WEBRTC_VIDEO_CODEC_OK; }
    172 
    173   virtual int32_t SetChannelParameters(uint32_t packetLoss, int64_t rtt) {
    174     return WEBRTC_VIDEO_CODEC_OK;
    175   }
    176 
    177   virtual int32_t SetRates(uint32_t newBitRate, uint32_t frameRate) {
    178     return WEBRTC_VIDEO_CODEC_OK;
    179   }
    180 
    181   int GetNumEncodedFrames() {
    182     rtc::CritScope lock(&crit_);
    183     return num_frames_encoded_;
    184   }
    185 
    186  private:
    187   rtc::CriticalSection crit_;
    188   int num_frames_encoded_ GUARDED_BY(crit_);
    189   webrtc::VideoCodec codec_settings_ GUARDED_BY(crit_);
    190 };
    191 
    192 // Fake class for mocking out WebRtcVideoEncoderFactory.
    193 class FakeWebRtcVideoEncoderFactory : public WebRtcVideoEncoderFactory {
    194  public:
    195   FakeWebRtcVideoEncoderFactory()
    196       : num_created_encoders_(0), encoders_have_internal_sources_(false) {}
    197 
    198   virtual webrtc::VideoEncoder* CreateVideoEncoder(
    199       webrtc::VideoCodecType type) {
    200     if (supported_codec_types_.count(type) == 0) {
    201       return NULL;
    202     }
    203     FakeWebRtcVideoEncoder* encoder = new FakeWebRtcVideoEncoder();
    204     encoders_.push_back(encoder);
    205     num_created_encoders_++;
    206     return encoder;
    207   }
    208 
    209   virtual void DestroyVideoEncoder(webrtc::VideoEncoder* encoder) {
    210     encoders_.erase(
    211         std::remove(encoders_.begin(), encoders_.end(), encoder),
    212         encoders_.end());
    213     delete encoder;
    214   }
    215 
    216   virtual const std::vector<WebRtcVideoEncoderFactory::VideoCodec>& codecs()
    217       const {
    218     return codecs_;
    219   }
    220 
    221   virtual bool EncoderTypeHasInternalSource(
    222       webrtc::VideoCodecType type) const override {
    223     return encoders_have_internal_sources_;
    224   }
    225 
    226   void set_encoders_have_internal_sources(bool internal_source) {
    227     encoders_have_internal_sources_ = internal_source;
    228   }
    229 
    230   void AddSupportedVideoCodecType(webrtc::VideoCodecType type,
    231                                   const std::string& name) {
    232     supported_codec_types_.insert(type);
    233     codecs_.push_back(
    234         WebRtcVideoEncoderFactory::VideoCodec(type, name, 1280, 720, 30));
    235   }
    236 
    237   int GetNumCreatedEncoders() {
    238     return num_created_encoders_;
    239   }
    240 
    241   const std::vector<FakeWebRtcVideoEncoder*>& encoders() {
    242     return encoders_;
    243   }
    244 
    245  private:
    246   std::set<webrtc::VideoCodecType> supported_codec_types_;
    247   std::vector<WebRtcVideoEncoderFactory::VideoCodec> codecs_;
    248   std::vector<FakeWebRtcVideoEncoder*> encoders_;
    249   int num_created_encoders_;
    250   bool encoders_have_internal_sources_;
    251 };
    252 
    253 }  // namespace cricket
    254 
    255 #endif  // TALK_MEDIA_WEBRTC_FAKEWEBRTCVIDEOENGINE_H_
    256