/*
 *  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 WEBRTC_MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_DEFINES_H_
#define WEBRTC_MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_DEFINES_H_

#include <string>
#include <vector>

#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/typedefs.h"
#include "webrtc/video_frame.h"

namespace webrtc {

// Error codes
#define VCM_FRAME_NOT_READY 3
#define VCM_REQUEST_SLI 2
#define VCM_MISSING_CALLBACK 1
#define VCM_OK 0
#define VCM_GENERAL_ERROR -1
#define VCM_LEVEL_EXCEEDED -2
#define VCM_MEMORY -3
#define VCM_PARAMETER_ERROR -4
#define VCM_UNKNOWN_PAYLOAD -5
#define VCM_CODEC_ERROR -6
#define VCM_UNINITIALIZED -7
#define VCM_NO_CODEC_REGISTERED -8
#define VCM_JITTER_BUFFER_ERROR -9
#define VCM_OLD_PACKET_ERROR -10
#define VCM_NO_FRAME_DECODED -11
#define VCM_ERROR_REQUEST_SLI -12
#define VCM_NOT_IMPLEMENTED -20

enum { kDefaultStartBitrateKbps = 300 };

enum VCMVideoProtection {
  kProtectionNone,
  kProtectionNack,
  kProtectionFEC,
  kProtectionNackFEC,
};

enum VCMTemporalDecimation {
  kBitrateOverUseDecimation,
};

struct VCMFrameCount {
  uint32_t numKeyFrames;
  uint32_t numDeltaFrames;
};

// Callback class used for passing decoded frames which are ready to be
// rendered.
class VCMReceiveCallback {
 public:
  virtual int32_t FrameToRender(VideoFrame& videoFrame) = 0;  // NOLINT
  virtual int32_t ReceivedDecodedReferenceFrame(const uint64_t pictureId) {
    return -1;
  }
  // Called when the current receive codec changes.
  virtual void OnIncomingPayloadType(int payload_type) {}
  virtual void OnDecoderImplementationName(const char* implementation_name) {}

 protected:
  virtual ~VCMReceiveCallback() {}
};

// Callback class used for informing the user of the bit rate and frame rate,
// and the name of the encoder.
class VCMSendStatisticsCallback {
 public:
  virtual void SendStatistics(uint32_t bitRate,
                              uint32_t frameRate,
                              const std::string& encoder_name) = 0;

 protected:
  virtual ~VCMSendStatisticsCallback() {}
};

// Callback class used for informing the user of the incoming bit rate and frame
// rate.
class VCMReceiveStatisticsCallback {
 public:
  virtual void OnReceiveRatesUpdated(uint32_t bitRate, uint32_t frameRate) = 0;
  virtual void OnDiscardedPacketsUpdated(int discarded_packets) = 0;
  virtual void OnFrameCountsUpdated(const FrameCounts& frame_counts) = 0;

 protected:
  virtual ~VCMReceiveStatisticsCallback() {}
};

// Callback class used for informing the user of decode timing info.
class VCMDecoderTimingCallback {
 public:
  virtual void OnDecoderTiming(int decode_ms,
                               int max_decode_ms,
                               int current_delay_ms,
                               int target_delay_ms,
                               int jitter_buffer_ms,
                               int min_playout_delay_ms,
                               int render_delay_ms) = 0;

 protected:
  virtual ~VCMDecoderTimingCallback() {}
};

// Callback class used for telling the user about how to configure the FEC,
// and the rates sent the last second is returned to the VCM.
class VCMProtectionCallback {
 public:
  virtual int ProtectionRequest(const FecProtectionParams* delta_params,
                                const FecProtectionParams* key_params,
                                uint32_t* sent_video_rate_bps,
                                uint32_t* sent_nack_rate_bps,
                                uint32_t* sent_fec_rate_bps) = 0;

 protected:
  virtual ~VCMProtectionCallback() {}
};

class VideoEncoderRateObserver {
 public:
  virtual ~VideoEncoderRateObserver() {}
  virtual void OnSetRates(uint32_t bitrate_bps, int framerate) = 0;
};

// Callback class used for telling the user about what frame type needed to
// continue decoding.
// Typically a key frame when the stream has been corrupted in some way.
class VCMFrameTypeCallback {
 public:
  virtual int32_t RequestKeyFrame() = 0;
  virtual int32_t SliceLossIndicationRequest(const uint64_t pictureId) {
    return -1;
  }

 protected:
  virtual ~VCMFrameTypeCallback() {}
};

// Callback class used for telling the user about which packet sequence numbers
// are currently
// missing and need to be resent.
// TODO(philipel): Deprecate VCMPacketRequestCallback
//                 and use NackSender instead.
class VCMPacketRequestCallback {
 public:
  virtual int32_t ResendPackets(const uint16_t* sequenceNumbers,
                                uint16_t length) = 0;

 protected:
  virtual ~VCMPacketRequestCallback() {}
};

class NackSender {
 public:
  virtual void SendNack(const std::vector<uint16_t>& sequence_numbers) = 0;

 protected:
  virtual ~NackSender() {}
};

class KeyFrameRequestSender {
 public:
  virtual void RequestKeyFrame() = 0;

 protected:
  virtual ~KeyFrameRequestSender() {}
};

}  // namespace webrtc

#endif  // WEBRTC_MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_DEFINES_H_