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