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/*
* Copyright (c) 2011 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 <string.h>
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/modules/interface/module_common_types.h"
#include "webrtc/modules/video_coding/main/source/decoding_state.h"
#include "webrtc/modules/video_coding/main/source/frame_buffer.h"
#include "webrtc/modules/video_coding/main/source/jitter_buffer_common.h"
#include "webrtc/modules/video_coding/main/source/packet.h"
namespace webrtc {
TEST(TestDecodingState, Sanity) {
VCMDecodingState dec_state;
dec_state.Reset();
EXPECT_TRUE(dec_state.in_initial_state());
EXPECT_TRUE(dec_state.full_sync());
}
TEST(TestDecodingState, FrameContinuity) {
VCMDecodingState dec_state;
// Check that makes decision based on correct method.
VCMFrameBuffer frame;
VCMFrameBuffer frame_key;
VCMPacket packet;
packet.isFirstPacket = true;
packet.timestamp = 1;
packet.seqNum = 0xffff;
packet.frameType = kVideoFrameDelta;
packet.codecSpecificHeader.codec = kRtpVideoVp8;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0x007F;
FrameData frame_data;
frame_data.rtt_ms = 0;
frame_data.rolling_average_packets_per_frame = -1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
// Always start with a key frame.
dec_state.Reset();
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
packet.frameType = kVideoFrameKey;
EXPECT_LE(0, frame_key.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame_key));
dec_state.SetState(&frame);
frame.Reset();
packet.frameType = kVideoFrameDelta;
// Use pictureId
packet.isFirstPacket = false;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0x0002;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
frame.Reset();
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0;
packet.seqNum = 10;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
// Use sequence numbers.
packet.codecSpecificHeader.codecHeader.VP8.pictureId = kNoPictureId;
frame.Reset();
packet.seqNum = dec_state.sequence_num() - 1u;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
frame.Reset();
packet.seqNum = dec_state.sequence_num() + 1u;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
// Insert another packet to this frame
packet.seqNum++;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
// Verify wrap.
EXPECT_LE(dec_state.sequence_num(), 0xffff);
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
// Insert packet with temporal info.
dec_state.Reset();
frame.Reset();
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0;
packet.seqNum = 1;
packet.timestamp = 1;
EXPECT_TRUE(dec_state.full_sync());
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
frame.Reset();
// 1 layer up - still good.
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 1;
packet.seqNum = 2;
packet.timestamp = 2;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
frame.Reset();
// Lost non-base layer packet => should update sync parameter.
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 3;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 3;
packet.seqNum = 4;
packet.timestamp = 4;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
// Now insert the next non-base layer (belonging to a next tl0PicId).
frame.Reset();
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 2;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 4;
packet.seqNum = 5;
packet.timestamp = 5;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
// Checking continuity and not updating the state - this should not trigger
// an update of sync state.
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
EXPECT_TRUE(dec_state.full_sync());
// Next base layer (dropped interim non-base layers) - should update sync.
frame.Reset();
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 5;
packet.seqNum = 6;
packet.timestamp = 6;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.full_sync());
// Check wrap for temporal layers.
frame.Reset();
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0x00FF;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 6;
packet.seqNum = 7;
packet.timestamp = 7;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.full_sync());
frame.Reset();
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0x0000;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 7;
packet.seqNum = 8;
packet.timestamp = 8;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
// The current frame is not continuous
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
}
TEST(TestDecodingState, UpdateOldPacket) {
VCMDecodingState dec_state;
// Update only if zero size and newer than previous.
// Should only update if the timeStamp match.
VCMFrameBuffer frame;
VCMPacket packet;
packet.timestamp = 1;
packet.seqNum = 1;
packet.frameType = kVideoFrameDelta;
FrameData frame_data;
frame_data.rtt_ms = 0;
frame_data.rolling_average_packets_per_frame = -1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
EXPECT_EQ(dec_state.sequence_num(), 1);
// Insert an empty packet that does not belong to the same frame.
// => Sequence num should be the same.
packet.timestamp = 2;
dec_state.UpdateOldPacket(&packet);
EXPECT_EQ(dec_state.sequence_num(), 1);
// Now insert empty packet belonging to the same frame.
packet.timestamp = 1;
packet.seqNum = 2;
packet.frameType = kFrameEmpty;
packet.sizeBytes = 0;
dec_state.UpdateOldPacket(&packet);
EXPECT_EQ(dec_state.sequence_num(), 2);
// Now insert delta packet belonging to the same frame.
packet.timestamp = 1;
packet.seqNum = 3;
packet.frameType = kVideoFrameDelta;
packet.sizeBytes = 1400;
dec_state.UpdateOldPacket(&packet);
EXPECT_EQ(dec_state.sequence_num(), 3);
// Insert a packet belonging to an older timestamp - should not update the
// sequence number.
packet.timestamp = 0;
packet.seqNum = 4;
packet.frameType = kFrameEmpty;
packet.sizeBytes = 0;
dec_state.UpdateOldPacket(&packet);
EXPECT_EQ(dec_state.sequence_num(), 3);
}
TEST(TestDecodingState, MultiLayerBehavior) {
// Identify sync/non-sync when more than one layer.
VCMDecodingState dec_state;
// Identify packets belonging to old frames/packets.
// Set state for current frames.
// tl0PicIdx 0, temporal id 0.
VCMFrameBuffer frame;
VCMPacket packet;
packet.frameType = kVideoFrameDelta;
packet.codecSpecificHeader.codec = kRtpVideoVp8;
packet.timestamp = 0;
packet.seqNum = 0;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0;
FrameData frame_data;
frame_data.rtt_ms = 0;
frame_data.rolling_average_packets_per_frame = -1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
// tl0PicIdx 0, temporal id 1.
frame.Reset();
packet.timestamp = 1;
packet.seqNum = 1;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
// Lost tl0PicIdx 0, temporal id 2.
// Insert tl0PicIdx 0, temporal id 3.
frame.Reset();
packet.timestamp = 3;
packet.seqNum = 3;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 3;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 3;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.full_sync());
// Insert next base layer
frame.Reset();
packet.timestamp = 4;
packet.seqNum = 4;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 4;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.full_sync());
// Insert key frame - should update sync value.
// A key frame is always a base layer.
frame.Reset();
packet.frameType = kVideoFrameKey;
packet.isFirstPacket = 1;
packet.timestamp = 5;
packet.seqNum = 5;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 2;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 5;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
// After sync, a continuous PictureId is required
// (continuous base layer is not enough )
frame.Reset();
packet.frameType = kVideoFrameDelta;
packet.timestamp = 6;
packet.seqNum = 6;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 3;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 6;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
EXPECT_TRUE(dec_state.full_sync());
frame.Reset();
packet.frameType = kVideoFrameDelta;
packet.isFirstPacket = 1;
packet.timestamp = 8;
packet.seqNum = 8;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 4;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 8;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
EXPECT_TRUE(dec_state.full_sync());
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.full_sync());
// Insert a non-ref frame - should update sync value.
frame.Reset();
packet.frameType = kVideoFrameDelta;
packet.isFirstPacket = 1;
packet.timestamp = 9;
packet.seqNum = 9;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 4;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 2;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 9;
packet.codecSpecificHeader.codecHeader.VP8.layerSync = true;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
// The following test will verify the sync flag behavior after a loss.
// Create the following pattern:
// Update base layer, lose packet 1 (sync flag on, layer 2), insert packet 3
// (sync flag on, layer 2) check continuity and sync flag after inserting
// packet 2 (sync flag on, layer 1).
// Base layer.
frame.Reset();
dec_state.Reset();
packet.frameType = kVideoFrameDelta;
packet.isFirstPacket = 1;
packet.markerBit = 1;
packet.timestamp = 0;
packet.seqNum = 0;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0;
packet.codecSpecificHeader.codecHeader.VP8.layerSync = false;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
// Layer 2 - 2 packets (insert one, lose one).
frame.Reset();
packet.frameType = kVideoFrameDelta;
packet.isFirstPacket = 1;
packet.markerBit = 0;
packet.timestamp = 1;
packet.seqNum = 1;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 2;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 1;
packet.codecSpecificHeader.codecHeader.VP8.layerSync = true;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
// Layer 1
frame.Reset();
packet.frameType = kVideoFrameDelta;
packet.isFirstPacket = 1;
packet.markerBit = 1;
packet.timestamp = 2;
packet.seqNum = 3;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 2;
packet.codecSpecificHeader.codecHeader.VP8.layerSync = true;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
EXPECT_TRUE(dec_state.full_sync());
}
TEST(TestDecodingState, DiscontinuousPicIdContinuousSeqNum) {
VCMDecodingState dec_state;
VCMFrameBuffer frame;
VCMPacket packet;
frame.Reset();
packet.frameType = kVideoFrameKey;
packet.codecSpecificHeader.codec = kRtpVideoVp8;
packet.timestamp = 0;
packet.seqNum = 0;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0;
FrameData frame_data;
frame_data.rtt_ms = 0;
frame_data.rolling_average_packets_per_frame = -1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
EXPECT_TRUE(dec_state.full_sync());
// Continuous sequence number but discontinuous picture id. This implies a
// a loss and we have to fall back to only decoding the base layer.
frame.Reset();
packet.frameType = kVideoFrameDelta;
packet.timestamp += 3000;
++packet.seqNum;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 1;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 2;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
dec_state.SetState(&frame);
EXPECT_FALSE(dec_state.full_sync());
}
TEST(TestDecodingState, OldInput) {
VCMDecodingState dec_state;
// Identify packets belonging to old frames/packets.
// Set state for current frames.
VCMFrameBuffer frame;
VCMPacket packet;
packet.timestamp = 10;
packet.seqNum = 1;
FrameData frame_data;
frame_data.rtt_ms = 0;
frame_data.rolling_average_packets_per_frame = -1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
packet.timestamp = 9;
EXPECT_TRUE(dec_state.IsOldPacket(&packet));
// Check for old frame
frame.Reset();
frame.InsertPacket(packet, 0, kNoErrors, frame_data);
EXPECT_TRUE(dec_state.IsOldFrame(&frame));
}
TEST(TestDecodingState, PictureIdRepeat) {
VCMDecodingState dec_state;
VCMFrameBuffer frame;
VCMPacket packet;
packet.frameType = kVideoFrameDelta;
packet.codecSpecificHeader.codec = kRtpVideoVp8;
packet.timestamp = 0;
packet.seqNum = 0;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx = 0;
packet.codecSpecificHeader.codecHeader.VP8.pictureId = 0;
FrameData frame_data;
frame_data.rtt_ms = 0;
frame_data.rolling_average_packets_per_frame = -1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
dec_state.SetState(&frame);
// tl0PicIdx 0, temporal id 1.
frame.Reset();
++packet.timestamp;
++packet.seqNum;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx++;
packet.codecSpecificHeader.codecHeader.VP8.pictureId++;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
frame.Reset();
// Testing only gap in tl0PicIdx when tl0PicIdx in continuous.
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx += 3;
packet.codecSpecificHeader.codecHeader.VP8.temporalIdx++;
packet.codecSpecificHeader.codecHeader.VP8.tl0PicIdx = 1;
EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
}
} // namespace webrtc
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