| /* |
| * 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 "webrtc/modules/rtp_rtcp/source/rtp_receiver_video.h" |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #include "webrtc/modules/rtp_rtcp/interface/rtp_payload_registry.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_format_video_generic.h" |
| #include "webrtc/modules/rtp_rtcp/source/rtp_utility.h" |
| #include "webrtc/system_wrappers/interface/critical_section_wrapper.h" |
| #include "webrtc/system_wrappers/interface/trace.h" |
| #include "webrtc/system_wrappers/interface/trace_event.h" |
| |
| namespace webrtc { |
| |
| RTPReceiverStrategy* RTPReceiverStrategy::CreateVideoStrategy( |
| int32_t id, RtpData* data_callback) { |
| return new RTPReceiverVideo(id, data_callback); |
| } |
| |
| RTPReceiverVideo::RTPReceiverVideo(int32_t id, RtpData* data_callback) |
| : RTPReceiverStrategy(data_callback), |
| id_(id) {} |
| |
| RTPReceiverVideo::~RTPReceiverVideo() { |
| } |
| |
| bool RTPReceiverVideo::ShouldReportCsrcChanges( |
| uint8_t payload_type) const { |
| // Always do this for video packets. |
| return true; |
| } |
| |
| int32_t RTPReceiverVideo::OnNewPayloadTypeCreated( |
| const char payload_name[RTP_PAYLOAD_NAME_SIZE], |
| int8_t payload_type, |
| uint32_t frequency) { |
| return 0; |
| } |
| |
| int32_t RTPReceiverVideo::ParseRtpPacket( |
| WebRtcRTPHeader* rtp_header, |
| const PayloadUnion& specific_payload, |
| bool is_red, |
| const uint8_t* payload, |
| uint16_t payload_length, |
| int64_t timestamp_ms, |
| bool is_first_packet) { |
| TRACE_EVENT2("webrtc_rtp", "Video::ParseRtp", |
| "seqnum", rtp_header->header.sequenceNumber, |
| "timestamp", rtp_header->header.timestamp); |
| rtp_header->type.Video.codec = specific_payload.Video.videoCodecType; |
| |
| const uint16_t payload_data_length = |
| payload_length - rtp_header->header.paddingLength; |
| |
| if (payload_data_length == 0) |
| return data_callback_->OnReceivedPayloadData(NULL, 0, rtp_header) == 0 ? 0 |
| : -1; |
| |
| return ParseVideoCodecSpecific(rtp_header, |
| payload, |
| payload_data_length, |
| specific_payload.Video.videoCodecType, |
| timestamp_ms, |
| is_first_packet); |
| } |
| |
| int RTPReceiverVideo::GetPayloadTypeFrequency() const { |
| return kVideoPayloadTypeFrequency; |
| } |
| |
| RTPAliveType RTPReceiverVideo::ProcessDeadOrAlive( |
| uint16_t last_payload_length) const { |
| return kRtpDead; |
| } |
| |
| int32_t RTPReceiverVideo::InvokeOnInitializeDecoder( |
| RtpFeedback* callback, |
| int32_t id, |
| int8_t payload_type, |
| const char payload_name[RTP_PAYLOAD_NAME_SIZE], |
| const PayloadUnion& specific_payload) const { |
| // For video we just go with default values. |
| if (-1 == callback->OnInitializeDecoder( |
| id, payload_type, payload_name, kVideoPayloadTypeFrequency, 1, 0)) { |
| WEBRTC_TRACE(kTraceError, |
| kTraceRtpRtcp, |
| id, |
| "Failed to create video decoder for payload type:%d", |
| payload_type); |
| return -1; |
| } |
| return 0; |
| } |
| |
| // We are not allowed to hold a critical section when calling this function. |
| int32_t RTPReceiverVideo::ParseVideoCodecSpecific( |
| WebRtcRTPHeader* rtp_header, |
| const uint8_t* payload_data, |
| uint16_t payload_data_length, |
| RtpVideoCodecTypes video_type, |
| int64_t now_ms, |
| bool is_first_packet) { |
| WEBRTC_TRACE(kTraceStream, |
| kTraceRtpRtcp, |
| id_, |
| "%s(timestamp:%u)", |
| __FUNCTION__, |
| rtp_header->header.timestamp); |
| |
| switch (rtp_header->type.Video.codec) { |
| case kRtpVideoGeneric: |
| rtp_header->type.Video.isFirstPacket = is_first_packet; |
| return ReceiveGenericCodec(rtp_header, payload_data, payload_data_length); |
| case kRtpVideoVp8: |
| return ReceiveVp8Codec(rtp_header, payload_data, payload_data_length); |
| case kRtpVideoNone: |
| break; |
| } |
| return -1; |
| } |
| |
| int32_t RTPReceiverVideo::BuildRTPheader( |
| const WebRtcRTPHeader* rtp_header, |
| uint8_t* data_buffer) const { |
| data_buffer[0] = static_cast<uint8_t>(0x80); // version 2 |
| data_buffer[1] = static_cast<uint8_t>(rtp_header->header.payloadType); |
| if (rtp_header->header.markerBit) { |
| data_buffer[1] |= kRtpMarkerBitMask; // MarkerBit is 1 |
| } |
| ModuleRTPUtility::AssignUWord16ToBuffer(data_buffer + 2, |
| rtp_header->header.sequenceNumber); |
| ModuleRTPUtility::AssignUWord32ToBuffer(data_buffer + 4, |
| rtp_header->header.timestamp); |
| ModuleRTPUtility::AssignUWord32ToBuffer(data_buffer + 8, |
| rtp_header->header.ssrc); |
| |
| int32_t rtp_header_length = 12; |
| |
| // Add the CSRCs if any |
| if (rtp_header->header.numCSRCs > 0) { |
| if (rtp_header->header.numCSRCs > 16) { |
| // error |
| assert(false); |
| } |
| uint8_t* ptr = &data_buffer[rtp_header_length]; |
| for (uint32_t i = 0; i < rtp_header->header.numCSRCs; ++i) { |
| ModuleRTPUtility::AssignUWord32ToBuffer(ptr, |
| rtp_header->header.arrOfCSRCs[i]); |
| ptr += 4; |
| } |
| data_buffer[0] = (data_buffer[0] & 0xf0) | rtp_header->header.numCSRCs; |
| // Update length of header |
| rtp_header_length += sizeof(uint32_t) * rtp_header->header.numCSRCs; |
| } |
| return rtp_header_length; |
| } |
| |
| int32_t RTPReceiverVideo::ReceiveVp8Codec(WebRtcRTPHeader* rtp_header, |
| const uint8_t* payload_data, |
| uint16_t payload_data_length) { |
| ModuleRTPUtility::RTPPayload parsed_packet; |
| uint32_t id; |
| { |
| CriticalSectionScoped cs(crit_sect_.get()); |
| id = id_; |
| } |
| ModuleRTPUtility::RTPPayloadParser rtp_payload_parser( |
| kRtpVideoVp8, payload_data, payload_data_length, id); |
| |
| if (!rtp_payload_parser.Parse(parsed_packet)) |
| return -1; |
| |
| if (parsed_packet.info.VP8.dataLength == 0) |
| return 0; |
| |
| rtp_header->frameType = (parsed_packet.frameType == ModuleRTPUtility::kIFrame) |
| ? kVideoFrameKey : kVideoFrameDelta; |
| |
| RTPVideoHeaderVP8* to_header = &rtp_header->type.Video.codecHeader.VP8; |
| ModuleRTPUtility::RTPPayloadVP8* from_header = &parsed_packet.info.VP8; |
| |
| rtp_header->type.Video.isFirstPacket = |
| from_header->beginningOfPartition && (from_header->partitionID == 0); |
| to_header->nonReference = from_header->nonReferenceFrame; |
| to_header->pictureId = |
| from_header->hasPictureID ? from_header->pictureID : kNoPictureId; |
| to_header->tl0PicIdx = |
| from_header->hasTl0PicIdx ? from_header->tl0PicIdx : kNoTl0PicIdx; |
| if (from_header->hasTID) { |
| to_header->temporalIdx = from_header->tID; |
| to_header->layerSync = from_header->layerSync; |
| } else { |
| to_header->temporalIdx = kNoTemporalIdx; |
| to_header->layerSync = false; |
| } |
| to_header->keyIdx = from_header->hasKeyIdx ? from_header->keyIdx : kNoKeyIdx; |
| |
| rtp_header->type.Video.width = from_header->frameWidth; |
| rtp_header->type.Video.height = from_header->frameHeight; |
| |
| to_header->partitionId = from_header->partitionID; |
| to_header->beginningOfPartition = from_header->beginningOfPartition; |
| |
| if (data_callback_->OnReceivedPayloadData(parsed_packet.info.VP8.data, |
| parsed_packet.info.VP8.dataLength, |
| rtp_header) != 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| int32_t RTPReceiverVideo::ReceiveGenericCodec( |
| WebRtcRTPHeader* rtp_header, |
| const uint8_t* payload_data, |
| uint16_t payload_data_length) { |
| uint8_t generic_header = *payload_data++; |
| --payload_data_length; |
| |
| rtp_header->frameType = |
| ((generic_header & RtpFormatVideoGeneric::kKeyFrameBit) != 0) ? |
| kVideoFrameKey : kVideoFrameDelta; |
| rtp_header->type.Video.isFirstPacket = |
| (generic_header & RtpFormatVideoGeneric::kFirstPacketBit) != 0; |
| |
| if (data_callback_->OnReceivedPayloadData( |
| payload_data, payload_data_length, rtp_header) != 0) { |
| return -1; |
| } |
| return 0; |
| } |
| } // namespace webrtc |
