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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 WEBRTC_MODULES_AUDIO_CODING_NETEQ4_DECODER_DATABASE_H_
-#define WEBRTC_MODULES_AUDIO_CODING_NETEQ4_DECODER_DATABASE_H_
-
-#include <map>
-
-#include "webrtc/common_types.h" // NULL
-#include "webrtc/modules/audio_coding/neteq4/interface/audio_decoder.h"
-#include "webrtc/modules/audio_coding/neteq4/packet.h"
-#include "webrtc/system_wrappers/interface/constructor_magic.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-// Forward declaration.
-class AudioDecoder;
-
-class DecoderDatabase {
- public:
- enum DatabaseReturnCodes {
- kOK = 0,
- kInvalidRtpPayloadType = -1,
- kCodecNotSupported = -2,
- kInvalidSampleRate = -3,
- kDecoderExists = -4,
- kDecoderNotFound = -5,
- kInvalidPointer = -6
- };
-
- // Struct used to store decoder info in the database.
- struct DecoderInfo {
- // Constructors.
- DecoderInfo()
- : codec_type(kDecoderArbitrary),
- fs_hz(8000),
- decoder(NULL),
- external(false) {
- }
- DecoderInfo(NetEqDecoder ct, int fs, AudioDecoder* dec, bool ext)
- : codec_type(ct),
- fs_hz(fs),
- decoder(dec),
- external(ext) {
- }
- // Destructor. (Defined in decoder_database.cc.)
- ~DecoderInfo();
-
- NetEqDecoder codec_type;
- int fs_hz;
- AudioDecoder* decoder;
- bool external;
- };
-
- static const uint8_t kMaxRtpPayloadType = 0x7F; // Max for a 7-bit number.
- // Maximum value for 8 bits, and an invalid RTP payload type (since it is
- // only 7 bits).
- static const uint8_t kRtpPayloadTypeError = 0xFF;
-
- DecoderDatabase();
-
- virtual ~DecoderDatabase();
-
- // Returns true if the database is empty.
- virtual bool Empty() const;
-
- // Returns the number of decoders registered in the database.
- virtual int Size() const;
-
- // Resets the database, erasing all registered payload types, and deleting
- // any AudioDecoder objects that were not externally created and inserted
- // using InsertExternal().
- virtual void Reset();
-
- // Registers |rtp_payload_type| as a decoder of type |codec_type|. Returns
- // kOK on success; otherwise an error code.
- virtual int RegisterPayload(uint8_t rtp_payload_type,
- NetEqDecoder codec_type);
-
- // Registers an externally created AudioDecoder object, and associates it
- // as a decoder of type |codec_type| with |rtp_payload_type|.
- virtual int InsertExternal(uint8_t rtp_payload_type,
- NetEqDecoder codec_type,
- int fs_hz, AudioDecoder* decoder);
-
- // Removes the entry for |rtp_payload_type| from the database.
- // Returns kDecoderNotFound or kOK depending on the outcome of the operation.
- virtual int Remove(uint8_t rtp_payload_type);
-
- // Returns a pointer to the DecoderInfo struct for |rtp_payload_type|. If
- // no decoder is registered with that |rtp_payload_type|, NULL is returned.
- virtual const DecoderInfo* GetDecoderInfo(uint8_t rtp_payload_type) const;
-
- // Returns one RTP payload type associated with |codec_type|, or
- // kDecoderNotFound if no entry exists for that value. Note that one
- // |codec_type| may be registered with several RTP payload types, and the
- // method may return any of them.
- virtual uint8_t GetRtpPayloadType(NetEqDecoder codec_type) const;
-
- // Returns a pointer to the AudioDecoder object associated with
- // |rtp_payload_type|, or NULL if none is registered. If the AudioDecoder
- // object does not exist for that decoder, the object is created.
- virtual AudioDecoder* GetDecoder(uint8_t rtp_payload_type);
-
- // Returns true if |rtp_payload_type| is registered as a |codec_type|.
- virtual bool IsType(uint8_t rtp_payload_type,
- NetEqDecoder codec_type) const;
-
- // Returns true if |rtp_payload_type| is registered as comfort noise.
- virtual bool IsComfortNoise(uint8_t rtp_payload_type) const;
-
- // Returns true if |rtp_payload_type| is registered as DTMF.
- virtual bool IsDtmf(uint8_t rtp_payload_type) const;
-
- // Returns true if |rtp_payload_type| is registered as RED.
- virtual bool IsRed(uint8_t rtp_payload_type) const;
-
- // Sets the active decoder to be |rtp_payload_type|. If this call results in a
- // change of active decoder, |new_decoder| is set to true. The previous active
- // decoder's AudioDecoder object is deleted.
- virtual int SetActiveDecoder(uint8_t rtp_payload_type, bool* new_decoder);
-
- // Returns the current active decoder, or NULL if no active decoder exists.
- virtual AudioDecoder* GetActiveDecoder();
-
- // Sets the active comfort noise decoder to be |rtp_payload_type|. If this
- // call results in a change of active comfort noise decoder, the previous
- // active decoder's AudioDecoder object is deleted.
- virtual int SetActiveCngDecoder(uint8_t rtp_payload_type);
-
- // Returns the current active comfort noise decoder, or NULL if no active
- // comfort noise decoder exists.
- virtual AudioDecoder* GetActiveCngDecoder();
-
- // Returns kOK if all packets in |packet_list| carry payload types that are
- // registered in the database. Otherwise, returns kDecoderNotFound.
- virtual int CheckPayloadTypes(const PacketList& packet_list) const;
-
- private:
- typedef std::map<uint8_t, DecoderInfo> DecoderMap;
-
- DecoderMap decoders_;
- int active_decoder_;
- int active_cng_decoder_;
-
- DISALLOW_COPY_AND_ASSIGN(DecoderDatabase);
-};
-
-} // namespace webrtc
-#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ4_DECODER_DATABASE_H_