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/*
* 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.
*/
#ifndef MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_H_
#define MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_H_
#include "api/field_trials_view.h"
#include "api/video/video_frame.h"
#include "api/video_codecs/video_decoder.h"
#include "modules/rtp_rtcp/source/rtp_video_header.h"
#include "modules/video_coding/include/video_coding_defines.h"
namespace webrtc {
class Clock;
class EncodedImageCallback;
class VideoDecoder;
class VideoEncoder;
struct CodecSpecificInfo;
class VideoCodingModule {
public:
// DEPRECATED.
static VideoCodingModule* Create(
Clock* clock,
const FieldTrialsView* field_trials = nullptr);
virtual ~VideoCodingModule() = default;
/*
* Receiver
*/
// Register possible receive codecs, can be called multiple times for
// different codecs.
// The module will automatically switch between registered codecs depending on
// the
// payload type of incoming frames. The actual decoder will be created when
// needed.
//
// Input:
// - payload_type : RTP payload type
// - settings : Settings for the decoder to be registered.
//
virtual void RegisterReceiveCodec(uint8_t payload_type,
const VideoDecoder::Settings& settings) = 0;
// Register an external decoder object.
//
// Input:
// - externalDecoder : Decoder object to be used for decoding frames.
// - payloadType : The payload type which this decoder is bound to.
virtual void RegisterExternalDecoder(VideoDecoder* externalDecoder,
uint8_t payloadType) = 0;
// Register a receive callback. Will be called whenever there is a new frame
// ready
// for rendering.
//
// Input:
// - receiveCallback : The callback object to be used by the
// module when a
// frame is ready for rendering.
// De-register with a NULL pointer.
//
// Return value : VCM_OK, on success.
// < 0, on error.
virtual int32_t RegisterReceiveCallback(
VCMReceiveCallback* receiveCallback) = 0;
// Register a frame type request callback. This callback will be called when
// the
// module needs to request specific frame types from the send side.
//
// Input:
// - frameTypeCallback : The callback object to be used by the
// module when
// requesting a specific type of frame from
// the send side.
// De-register with a NULL pointer.
//
// Return value : VCM_OK, on success.
// < 0, on error.
virtual int32_t RegisterFrameTypeCallback(
VCMFrameTypeCallback* frameTypeCallback) = 0;
// Registers a callback which is called whenever the receive side of the VCM
// encounters holes in the packet sequence and needs packets to be
// retransmitted.
//
// Input:
// - callback : The callback to be registered in the VCM.
//
// Return value : VCM_OK, on success.
// <0, on error.
virtual int32_t RegisterPacketRequestCallback(
VCMPacketRequestCallback* callback) = 0;
// Waits for the next frame in the jitter buffer to become complete
// (waits no longer than maxWaitTimeMs), then passes it to the decoder for
// decoding.
// Should be called as often as possible to get the most out of the decoder.
//
// Return value : VCM_OK, on success.
// < 0, on error.
virtual int32_t Decode(uint16_t maxWaitTimeMs = 200) = 0;
// Insert a parsed packet into the receiver side of the module. Will be placed
// in the
// jitter buffer waiting for the frame to become complete. Returns as soon as
// the packet
// has been placed in the jitter buffer.
//
// Input:
// - incomingPayload : Payload of the packet.
// - payloadLength : Length of the payload.
// - rtp_header : The parsed RTP header.
// - video_header : The relevant extensions and payload header.
//
// Return value : VCM_OK, on success.
// < 0, on error.
virtual int32_t IncomingPacket(const uint8_t* incomingPayload,
size_t payloadLength,
const RTPHeader& rtp_header,
const RTPVideoHeader& video_header) = 0;
// Sets the maximum number of sequence numbers that we are allowed to NACK
// and the oldest sequence number that we will consider to NACK. If a
// sequence number older than `max_packet_age_to_nack` is missing
// a key frame will be requested. A key frame will also be requested if the
// time of incomplete or non-continuous frames in the jitter buffer is above
// `max_incomplete_time_ms`.
virtual void SetNackSettings(size_t max_nack_list_size,
int max_packet_age_to_nack,
int max_incomplete_time_ms) = 0;
// Runs delayed tasks. Expected to be called periodically.
virtual void Process() = 0;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_H_
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