blob: 80575c3aa0c22ae1ae01e454fcb17dd2dbbda41c [file] [log] [blame]
* 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 <map>
#include <vector>
#include "video_engine/include/vie_codec.h"
#include "video_engine/include/vie_image_process.h"
#include "video_engine/test/auto_test/interface/vie_autotest_defines.h"
#include "video_engine/test/auto_test/helpers/vie_to_file_renderer.h"
class FrameDropDetector;
class TbInterfaces;
// Initializes the Video engine and its components, runs video playback using
// for KAutoTestSleepTimeMs milliseconds, then shuts down everything.
// The bit rate and packet loss parameters should be configured so that
// frames are dropped, in order to test the frame drop detection that is
// performed by the FrameDropDetector class.
void TestFullStack(const TbInterfaces& interfaces,
int capture_id,
int video_channel,
int width,
int height,
int bit_rate_kbps,
int packet_loss_percent,
int network_delay_ms,
FrameDropDetector* frame_drop_detector);
// A frame in a video file. The four different points in the stack when
// register the frame state are (in time order): created, transmitted, decoded,
// rendered.
class Frame {
Frame(int number, unsigned int timestamp)
: number_(number),
dropped_at_render(false) {}
// Frame number, starting at 0.
int number_;
// Frame timestamp, that is used by Video Engine and RTP headers and set when
// the frame is sent into the stack.
unsigned int frame_timestamp_;
// Timestamps for our measurements of when the frame is in different states.
int64_t created_timestamp_in_us_;
int64_t sent_timestamp_in_us_;
int64_t received_timestamp_in_us_;
int64_t decoded_timestamp_in_us_;
int64_t rendered_timestamp_in_us_;
// Where the frame was dropped (more than one may be true).
bool dropped_at_send;
bool dropped_at_receive;
bool dropped_at_decode;
bool dropped_at_render;
// Fixes the output file by copying the last successful frame into the place
// where the dropped frame would be, for all dropped frames (if any).
// This method will not be able to fix data for the first frame if that is
// dropped, since there'll be no previous frame to copy. This case should never
// happen because of encoder frame dropping at least.
// Parameters:
// output_file The output file to modify (pad with frame copies
// for all dropped frames)
// frame_length_in_bytes Byte length of each frame.
// frames A vector of all Frame objects. Must be sorted by
// frame number. If empty this method will do nothing.
void FixOutputFileForComparison(const std::string& output_file,
int frame_length_in_bytes,
const std::vector<Frame*>& frames);
// Handles statistics about dropped frames. Frames travel through the stack
// with different timestamps. The frames created and sent to the encoder have
// one timestamp on the sending side while the decoded/rendered frames have
// another timestamp on the receiving side. The difference between these
// timestamps is fixed, which we can use to identify the frames when they
// arrive, since the FrameDropDetector class gets data reported from both sides.
// The four different points in the stack when this class examines the frame
// states are (in time order): created, sent, received, decoded, rendered.
// The flow can be visualized like this:
// Created Sent Received Decoded Rendered
// +-------+ | +-------+ | +---------+ | +------+ +-------+ | +--------+
// |Capture| | |Encoder| | | Ext. | | |Jitter| |Decoder| | | Ext. |
// | device|---->| |-->|transport|-->|buffer|->| |---->|renderer|
// +-------+ +-------+ +---------+ +------+ +-------+ +--------+
// This class has no intention of being thread-safe.
class FrameDropDetector {
enum State {
// A frame being created, i.e. sent to the encoder; the first step of
// a frame's life cycle. This timestamp becomes the frame timestamp in the
// Frame objects.
// A frame being sent in external transport (to the simulated network). This
// timestamp differs from the one in the Created state by a constant diff.
// A frame being received in external transport (from the simulated
// network). This timestamp differs from the one in the Created state by a
// constant diff.
// A frame that has been decoded in the decoder. This timestamp differs
// from the one in the Created state by a constant diff.
// A frame that has been rendered; the last step of a frame's life cycle.
// This timestamp differs from the one in the Created state by a constant
// diff.
: dirty_(true),
timestamp_diff_(0) {}
// Reports a frame has reached a state in the frame life cycle.
void ReportFrameState(State state, unsigned int timestamp);
// Uses all the gathered timestamp information to calculate which frames have
// been dropped during the test and where they were dropped. Not until
// this method has been executed, the Frame objects will have all fields
// filled with the proper timestamp information.
void CalculateResults();
// Calculates the number of frames have been registered as dropped at the
// specified state of the frame life cycle.
// CalculateResults() must be called before calling this method.
int GetNumberOfFramesDroppedAt(State state);
// Gets a vector of all the created frames.
// CalculateResults() must be called before calling this method to have all
// fields of the Frame objects to represent the current state.
const std::vector<Frame*>& GetAllFrames();
// Prints a detailed report about all the different frame states and which
// ones are detected as dropped, using ViETest::Log.
// CalculateResults() must be called before calling this method.
void PrintReport();
// Prints all the timestamp maps. Mainly used for debugging purposes to find
// missing timestamps.
void PrintDebugDump();
// Will be false until CalculateResults() is called. Switches to true
// as soon as new timestamps are reported using ReportFrameState().
bool dirty_;
// Map of frame creation timestamps to all Frame objects.
std::map<unsigned int, Frame*> created_frames_;
// Maps converted frame timestamps (differ from creation timestamp) to the
// time they arrived in the different states of the frame's life cycle.
std::map<unsigned int, int64_t> sent_frames_;
std::map<unsigned int, int64_t> received_frames_;
std::map<unsigned int, int64_t> decoded_frames_;
std::map<unsigned int, int64_t> rendered_frames_;
// A vector with the frames sorted in their created order.
std::vector<Frame*> created_frames_vector_;
// Statistics.
int dropped_frames_at_send_;
int dropped_frames_at_receive_;
int dropped_frames_at_decode_;
int dropped_frames_at_render_;
int num_created_frames_;
int num_sent_frames_;
int num_received_frames_;
int num_decoded_frames_;
int num_rendered_frames_;
// The constant diff between the created and transmitted frames, since their
// timestamps are converted.
unsigned int timestamp_diff_;
// Tracks which frames are received on the remote side and reports back to the
// FrameDropDetector class when they are rendered.
class FrameDropMonitoringRemoteFileRenderer : public ViEToFileRenderer {
explicit FrameDropMonitoringRemoteFileRenderer(
FrameDropDetector* frame_drop_detector)
: frame_drop_detector_(frame_drop_detector) {}
virtual ~FrameDropMonitoringRemoteFileRenderer() {}
// Implementation of ExternalRenderer:
int FrameSizeChange(unsigned int width, unsigned int height,
unsigned int number_of_streams);
int DeliverFrame(unsigned char* buffer, int buffer_size,
uint32_t time_stamp,
int64_t render_time);
FrameDropDetector* frame_drop_detector_;