1/*
2 * Copyright 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//
18// A2DP Codec API for aptX-HD
19//
20
21#ifndef A2DP_VENDOR_APTX_HD_H
22#define A2DP_VENDOR_APTX_HD_H
23
24#include "a2dp_codec_api.h"
25#include "a2dp_vendor_aptx_hd_constants.h"
26#include "avdt_api.h"
27
28class A2dpCodecConfigAptxHd : public A2dpCodecConfig {
29 public:
30  A2dpCodecConfigAptxHd(btav_a2dp_codec_priority_t codec_priority);
31  virtual ~A2dpCodecConfigAptxHd();
32
33  bool init() override;
34  period_ms_t encoderIntervalMs() const override;
35  int getEffectiveMtu() const override;
36  bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability,
37                      uint8_t* p_result_codec_config) override;
38  bool setPeerCodecCapabilities(
39      const uint8_t* p_peer_codec_capabilities) override;
40
41 private:
42  bool useRtpHeaderMarkerBit() const override;
43  bool updateEncoderUserConfig(
44      const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
45      bool* p_restart_input, bool* p_restart_output,
46      bool* p_config_updated) override;
47  void debug_codec_dump(int fd) override;
48};
49
50// Checks whether the codec capabilities contain a valid A2DP aptX-HD Source
51// codec.
52// NOTE: only codecs that are implemented are considered valid.
53// Returns true if |p_codec_info| contains information about a valid aptX-HD
54// codec, otherwise false.
55bool A2DP_IsVendorSourceCodecValidAptxHd(const uint8_t* p_codec_info);
56
57// Checks whether the codec capabilities contain a valid peer A2DP aptX-HD Sink
58// codec.
59// NOTE: only codecs that are implemented are considered valid.
60// Returns true if |p_codec_info| contains information about a valid aptX-HD
61// codec, otherwise false.
62bool A2DP_IsVendorPeerSinkCodecValidAptxHd(const uint8_t* p_codec_info);
63
64// Checks whether the A2DP data packets should contain RTP header.
65// |content_protection_enabled| is true if Content Protection is
66// enabled. |p_codec_info| contains information about the codec capabilities.
67// Returns true if the A2DP data packets should contain RTP header, otherwise
68// false.
69bool A2DP_VendorUsesRtpHeaderAptxHd(bool content_protection_enabled,
70                                    const uint8_t* p_codec_info);
71
72// Gets the A2DP aptX-HD codec name for a given |p_codec_info|.
73const char* A2DP_VendorCodecNameAptxHd(const uint8_t* p_codec_info);
74
75// Checks whether two A2DP aptX-HD codecs |p_codec_info_a| and |p_codec_info_b|
76// have the same type.
77// Returns true if the two codecs have the same type, otherwise false.
78bool A2DP_VendorCodecTypeEqualsAptxHd(const uint8_t* p_codec_info_a,
79                                      const uint8_t* p_codec_info_b);
80
81// Checks whether two A2DP aptX-HD codecs |p_codec_info_a| and |p_codec_info_b|
82// are exactly the same.
83// Returns true if the two codecs are exactly the same, otherwise false.
84// If the codec type is not aptX-HD, the return value is false.
85bool A2DP_VendorCodecEqualsAptxHd(const uint8_t* p_codec_info_a,
86                                  const uint8_t* p_codec_info_b);
87
88// Gets the track sample rate value for the A2DP aptX-HD codec.
89// |p_codec_info| is a pointer to the aptX-HD codec_info to decode.
90// Returns the track sample rate on success, or -1 if |p_codec_info|
91// contains invalid codec information.
92int A2DP_VendorGetTrackSampleRateAptxHd(const uint8_t* p_codec_info);
93
94// Gets the track bitrate value for the A2DP aptX-HD codec.
95// |p_codec_info| is a pointer to the aptX-HD codec_info to decode.
96// Returns the track sample rate on success, or -1 if |p_codec_info|
97// contains invalid codec information.
98int A2DP_VendorGetBitRateAptxHd(const uint8_t* p_codec_info);
99
100// Gets the channel count for the A2DP aptX-HD codec.
101// |p_codec_info| is a pointer to the aptX-HD codec_info to decode.
102// Returns the channel count on success, or -1 if |p_codec_info|
103// contains invalid codec information.
104int A2DP_VendorGetTrackChannelCountAptxHd(const uint8_t* p_codec_info);
105
106// Gets the A2DP aptX-HD audio data timestamp from an audio packet.
107// |p_codec_info| contains the codec information.
108// |p_data| contains the audio data.
109// The timestamp is stored in |p_timestamp|.
110// Returns true on success, otherwise false.
111bool A2DP_VendorGetPacketTimestampAptxHd(const uint8_t* p_codec_info,
112                                         const uint8_t* p_data,
113                                         uint32_t* p_timestamp);
114
115// Builds A2DP aptX-HD codec header for audio data.
116// |p_codec_info| contains the codec information.
117// |p_buf| contains the audio data.
118// |frames_per_packet| is the number of frames in this packet.
119// Returns true on success, otherwise false.
120bool A2DP_VendorBuildCodecHeaderAptxHd(const uint8_t* p_codec_info,
121                                       BT_HDR* p_buf,
122                                       uint16_t frames_per_packet);
123
124// Decodes A2DP aptX-HD codec info into a human readable string.
125// |p_codec_info| is a pointer to the aptX-HD codec_info to decode.
126// Returns a string describing the codec information.
127std::string A2DP_VendorCodecInfoStringAptxHd(const uint8_t* p_codec_info);
128
129// Gets the A2DP aptX-HD encoder interface that can be used to encode and
130// prepare A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|.
131// |p_codec_info| contains the codec information.
132// Returns the A2DP aptX-HD encoder interface if the |p_codec_info| is valid
133// and supported, otherwise NULL.
134const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterfaceAptxHd(
135    const uint8_t* p_codec_info);
136
137// Adjusts the A2DP aptX-HD codec, based on local support and Bluetooth
138// specification.
139// |p_codec_info| contains the codec information to adjust.
140// Returns true if |p_codec_info| is valid and supported, otherwise false.
141bool A2DP_VendorAdjustCodecAptxHd(uint8_t* p_codec_info);
142
143// Gets the A2DP aptX-HD Source codec index for a given |p_codec_info|.
144// Returns the corresponding |btav_a2dp_codec_index_t| on success,
145// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|.
146btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndexAptxHd(
147    const uint8_t* p_codec_info);
148
149// Gets the A2DP aptX-HD Source codec name.
150const char* A2DP_VendorCodecIndexStrAptxHd(void);
151
152// Initializes A2DP aptX-HD Source codec information into |AvdtpSepConfig|
153// configuration entry pointed by |p_cfg|.
154bool A2DP_VendorInitCodecConfigAptxHd(AvdtpSepConfig* p_cfg);
155
156#endif  // A2DP_VENDOR_APTX_HD_H
157