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Allowing RED decoding for Opus.

Browse Source 
BUG=4247
TEST=reproduced and fixed the bug
R=henrik.lundin@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/41809004

Cr-Commit-Position: refs/heads/master@{#8364}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8364 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
minyue@webrtc.org
2015-02-13 14:01:54 +00:00
parent 96e4db9bea
commit a8cc3440b1
8 changed files with 130 additions and 48 deletions
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134
webrtc/modules/audio_coding/neteq/payload_splitter_unittest.cc
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@ -32,6 +32,28 @@ static const size_t kRedHeaderLength = 4; // 4 bytes RED header.
static const uint16_t kSequenceNumber = 0;
static const uint32_t kBaseTimestamp = 0x12345678;
// A possible Opus packet that contains FEC is the following.
// The frame is 20 ms in duration.
//
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |0|0|0|0|1|0|0|0|x|1|x|x|x|x|x|x|x| |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
// | Compressed frame 1 (N-2 bytes)... :
// : |
// | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
void CreateOpusFecPayload(uint8_t* payload, size_t payload_length,
uint8_t payload_value) {
if (payload_length < 2) {
return;
}
payload[0] = 0x08;
payload[1] = 0x40;
memset(&payload[2], payload_value, payload_length - 2);
}
// RED headers (according to RFC 2198):
//
// 0 1 2 3
@ -52,7 +74,8 @@ static const uint32_t kBaseTimestamp = 0x12345678;
// "behind" the the previous payload.
Packet* CreateRedPayload(size_t num_payloads,
uint8_t* payload_types,
int timestamp_offset) {
int timestamp_offset,
bool embed_opus_fec = false) {
Packet* packet = new Packet;
packet->header.payloadType = kRedPayloadType;
packet->header.timestamp = kBaseTimestamp;
@ -84,52 +107,34 @@ Packet* CreateRedPayload(size_t num_payloads,
}
for (size_t i = 0; i < num_payloads; ++i) {
// Write |i| to all bytes in each payload.
memset(payload_ptr, static_cast<int>(i), kPayloadLength);
if (embed_opus_fec) {
CreateOpusFecPayload(payload_ptr, kPayloadLength,
static_cast<uint8_t>(i));
} else {
memset(payload_ptr, static_cast<int>(i), kPayloadLength);
}
payload_ptr += kPayloadLength;
}
packet->payload = payload;
return packet;
}
// A possible Opus packet that contains FEC is the following.
// The frame is 20 ms in duration.
//
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |0|0|0|0|1|0|0|0|x|1|x|x|x|x|x|x|x| |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
// | Compressed frame 1 (N-2 bytes)... :
// : |
// | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Packet* CreateOpusFecPacket(uint8_t payload_type, size_t payload_length,
uint8_t payload_value) {
Packet* packet = new Packet;
packet->header.payloadType = payload_type;
packet->header.timestamp = kBaseTimestamp;
packet->header.sequenceNumber = kSequenceNumber;
packet->payload_length = payload_length;
uint8_t* payload = new uint8_t[packet->payload_length];
payload[0] = 0x08;
payload[1] = 0x40;
memset(&payload[2], payload_value, payload_length - 2);
packet->payload = payload;
return packet;
}
// Create a packet with all payload bytes set to |payload_value|.
Packet* CreatePacket(uint8_t payload_type, size_t payload_length,
uint8_t payload_value) {
uint8_t payload_value, bool opus_fec = false) {
Packet* packet = new Packet;
packet->header.payloadType = payload_type;
packet->header.timestamp = kBaseTimestamp;
packet->header.sequenceNumber = kSequenceNumber;
packet->payload_length = payload_length;
uint8_t* payload = new uint8_t[packet->payload_length];
memset(payload, payload_value, payload_length);
packet->payload = payload;
if (opus_fec) {
CreateOpusFecPayload(packet->payload, packet->payload_length,
payload_value);
} else {
memset(payload, payload_value, payload_length);
}
return packet;
}
@ -726,7 +731,7 @@ TEST(FecPayloadSplitter, MixedPayload) {
decoder_database.RegisterPayload(0, kDecoderOpus);
decoder_database.RegisterPayload(1, kDecoderPCMu);
Packet* packet = CreateOpusFecPacket(0, 10, 0xFF);
Packet* packet = CreatePacket(0, 10, 0xFF, true);
packet_list.push_back(packet);
packet = CreatePacket(0, 10, 0); // Non-FEC Opus payload.
@ -774,4 +779,67 @@ TEST(FecPayloadSplitter, MixedPayload) {
delete packet;
}
TEST(FecPayloadSplitter, EmbedFecInRed) {
PacketList packet_list;
DecoderDatabase decoder_database;
const int kTimestampOffset = 20 * 48; // 20 ms * 48 kHz.
uint8_t payload_types[] = {0, 0};
decoder_database.RegisterPayload(0, kDecoderOpus);
Packet* packet = CreateRedPayload(2, payload_types, kTimestampOffset, true);
packet_list.push_back(packet);
PayloadSplitter splitter;
EXPECT_EQ(PayloadSplitter::kOK,
splitter.SplitRed(&packet_list));
EXPECT_EQ(PayloadSplitter::kOK,
splitter.SplitFec(&packet_list, &decoder_database));
EXPECT_EQ(4u, packet_list.size());
// Check first packet. FEC packet copied from primary payload in RED.
packet = packet_list.front();
EXPECT_EQ(0, packet->header.payloadType);
EXPECT_EQ(kBaseTimestamp - kTimestampOffset, packet->header.timestamp);
EXPECT_EQ(kPayloadLength, packet->payload_length);
EXPECT_FALSE(packet->primary);
EXPECT_EQ(packet->payload[3], 1);
delete [] packet->payload;
delete packet;
packet_list.pop_front();
// Check second packet. Normal packet copied from primary payload in RED.
packet = packet_list.front();
EXPECT_EQ(0, packet->header.payloadType);
EXPECT_EQ(kBaseTimestamp, packet->header.timestamp);
EXPECT_EQ(kPayloadLength, packet->payload_length);
EXPECT_TRUE(packet->primary);
EXPECT_EQ(packet->payload[3], 1);
delete [] packet->payload;
delete packet;
packet_list.pop_front();
// Check third packet. FEC packet copied from secondary payload in RED.
packet = packet_list.front();
EXPECT_EQ(0, packet->header.payloadType);
EXPECT_EQ(kBaseTimestamp - 2 * kTimestampOffset, packet->header.timestamp);
EXPECT_EQ(kPayloadLength, packet->payload_length);
EXPECT_FALSE(packet->primary);
EXPECT_EQ(packet->payload[3], 0);
delete [] packet->payload;
delete packet;
packet_list.pop_front();
// Check fourth packet. Normal packet copied from primary payload in RED.
packet = packet_list.front();
EXPECT_EQ(0, packet->header.payloadType);
EXPECT_EQ(kBaseTimestamp - kTimestampOffset, packet->header.timestamp);
EXPECT_EQ(kPayloadLength, packet->payload_length);
EXPECT_TRUE(packet->primary);
EXPECT_EQ(packet->payload[3], 0);
delete [] packet->payload;
delete packet;
packet_list.pop_front();
}
} // namespace webrtc