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74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* This file contains the declaration of the VP8 packetizer class.
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* A packetizer object is created for each encoded video frame. The
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* constructor is called with the payload data and size,
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* together with the fragmentation information and a packetizer mode
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* of choice. Alternatively, if no fragmentation info is available, the
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* second constructor can be used with only payload data and size; in that
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* case the mode kEqualSize is used.
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*
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* After creating the packetizer, the method NextPacket is called
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* repeatedly to get all packets for the frame. The method returns
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* false as long as there are more packets left to fetch.
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*/
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#ifndef MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_VP8_H_
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#define MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_VP8_H_
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#include <stddef.h>
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#include <cstdint>
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#include <vector>
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#include "absl/container/inlined_vector.h"
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#include "api/array_view.h"
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#include "modules/rtp_rtcp/source/rtp_format.h"
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#include "modules/rtp_rtcp/source/rtp_packet_to_send.h"
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#include "modules/video_coding/codecs/vp8/include/vp8_globals.h"
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namespace webrtc {
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// Packetizer for VP8.
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class RtpPacketizerVp8 : public RtpPacketizer {
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public:
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// Initialize with payload from encoder.
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// The payload_data must be exactly one encoded VP8 frame.
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RtpPacketizerVp8(rtc::ArrayView<const uint8_t> payload,
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PayloadSizeLimits limits,
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const RTPVideoHeaderVP8& hdr_info);
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~RtpPacketizerVp8() override;
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RtpPacketizerVp8(const RtpPacketizerVp8&) = delete;
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RtpPacketizerVp8& operator=(const RtpPacketizerVp8&) = delete;
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size_t NumPackets() const override;
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// Get the next payload with VP8 payload header.
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// Write payload and set marker bit of the `packet`.
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// Returns true on success, false otherwise.
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bool NextPacket(RtpPacketToSend* packet) override;
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private:
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// VP8 header can use up to 6 bytes.
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using RawHeader = absl::InlinedVector<uint8_t, 6>;
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static RawHeader BuildHeader(const RTPVideoHeaderVP8& header);
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RawHeader hdr_;
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rtc::ArrayView<const uint8_t> remaining_payload_;
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std::vector<int> payload_sizes_;
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std::vector<int>::const_iterator current_packet_;
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};
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} // namespace webrtc
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#endif // MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_VP8_H_
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