1/*
2 * Copyright (C) 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 LDAC
19//
20
21#ifndef A2DP_VENDOR_LDAC_H
22#define A2DP_VENDOR_LDAC_H
23
24#include "a2dp_codec_api.h"
25#include "a2dp_vendor_ldac_constants.h"
26#include "avdt_api.h"
27
28class A2dpCodecConfigLdac : public A2dpCodecConfig {
29 public:
30  A2dpCodecConfigLdac(btav_a2dp_codec_priority_t codec_priority);
31  virtual ~A2dpCodecConfigLdac();
32
33  bool init() override;
34  period_ms_t encoderIntervalMs() const override;
35  bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability,
36                      uint8_t* p_result_codec_config) override;
37
38 private:
39  bool useRtpHeaderMarkerBit() const override;
40  bool updateEncoderUserConfig(
41      const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
42      bool* p_restart_input, bool* p_restart_output,
43      bool* p_config_updated) override;
44  void debug_codec_dump(int fd) override;
45};
46
47// Checks whether the codec capabilities contain a valid A2DP LDAC Source
48// codec.
49// NOTE: only codecs that are implemented are considered valid.
50// Returns true if |p_codec_info| contains information about a valid LDAC
51// codec, otherwise false.
52bool A2DP_IsVendorSourceCodecValidLdac(const uint8_t* p_codec_info);
53
54// Checks whether the codec capabilities contain a valid peer A2DP LDAC Sink
55// codec.
56// NOTE: only codecs that are implemented are considered valid.
57// Returns true if |p_codec_info| contains information about a valid LDAC
58// codec, otherwise false.
59bool A2DP_IsVendorPeerSinkCodecValidLdac(const uint8_t* p_codec_info);
60
61// Checks whether the A2DP data packets should contain RTP header.
62// |content_protection_enabled| is true if Content Protection is
63// enabled. |p_codec_info| contains information about the codec capabilities.
64// Returns true if the A2DP data packets should contain RTP header, otherwise
65// false.
66bool A2DP_VendorUsesRtpHeaderLdac(bool content_protection_enabled,
67                                  const uint8_t* p_codec_info);
68
69// Gets the A2DP LDAC codec name for a given |p_codec_info|.
70const char* A2DP_VendorCodecNameLdac(const uint8_t* p_codec_info);
71
72// Checks whether two A2DP LDAC codecs |p_codec_info_a| and |p_codec_info_b|
73// have the same type.
74// Returns true if the two codecs have the same type, otherwise false.
75bool A2DP_VendorCodecTypeEqualsLdac(const uint8_t* p_codec_info_a,
76                                    const uint8_t* p_codec_info_b);
77
78// Checks whether two A2DP LDAC codecs |p_codec_info_a| and |p_codec_info_b|
79// are exactly the same.
80// Returns true if the two codecs are exactly the same, otherwise false.
81// If the codec type is not LDAC, the return value is false.
82bool A2DP_VendorCodecEqualsLdac(const uint8_t* p_codec_info_a,
83                                const uint8_t* p_codec_info_b);
84
85// Gets the track sample rate value for the A2DP LDAC codec.
86// |p_codec_info| is a pointer to the LDAC codec_info to decode.
87// Returns the track sample rate on success, or -1 if |p_codec_info|
88// contains invalid codec information.
89int A2DP_VendorGetTrackSampleRateLdac(const uint8_t* p_codec_info);
90
91// Gets the bits per audio sample for the A2DP LDAC codec.
92// |p_codec_info| is a pointer to the LDAC codec_info to decode.
93// Returns the bits per audio sample on success, or -1 if |p_codec_info|
94// contains invalid codec information.
95int A2DP_VendorGetTrackBitsPerSampleLdac(const uint8_t* p_codec_info);
96
97// Gets the channel count for the A2DP LDAC codec.
98// |p_codec_info| is a pointer to the LDAC codec_info to decode.
99// Returns the channel count on success, or -1 if |p_codec_info|
100// contains invalid codec information.
101int A2DP_VendorGetTrackChannelCountLdac(const uint8_t* p_codec_info);
102
103// Gets the channel mode code for the A2DP LDAC codec.
104// The actual value is codec-specific - see |A2DP_LDAC_CHANNEL_MODE_*|.
105// |p_codec_info| is a pointer to the LDAC codec_info to decode.
106// Returns the channel mode code on success, or -1 if |p_codec_info|
107// contains invalid codec information.
108int A2DP_VendorGetChannelModeCodeLdac(const uint8_t* p_codec_info);
109
110// Gets the A2DP LDAC audio data timestamp from an audio packet.
111// |p_codec_info| contains the codec information.
112// |p_data| contains the audio data.
113// The timestamp is stored in |p_timestamp|.
114// Returns true on success, otherwise false.
115bool A2DP_VendorGetPacketTimestampLdac(const uint8_t* p_codec_info,
116                                       const uint8_t* p_data,
117                                       uint32_t* p_timestamp);
118
119// Builds A2DP LDAC codec header for audio data.
120// |p_codec_info| contains the codec information.
121// |p_buf| contains the audio data.
122// |frames_per_packet| is the number of frames in this packet.
123// Returns true on success, otherwise false.
124bool A2DP_VendorBuildCodecHeaderLdac(const uint8_t* p_codec_info, BT_HDR* p_buf,
125                                     uint16_t frames_per_packet);
126
127// Decodes and displays LDAC codec info (for debugging).
128// |p_codec_info| is a pointer to the LDAC codec_info to decode and display.
129void A2DP_VendorDumpCodecInfoLdac(const uint8_t* p_codec_info);
130
131// Gets the A2DP LDAC encoder interface that can be used to encode and prepare
132// A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|.
133// |p_codec_info| contains the codec information.
134// Returns the A2DP LDAC encoder interface if the |p_codec_info| is valid and
135// supported, otherwise NULL.
136const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterfaceLdac(
137    const uint8_t* p_codec_info);
138
139// Adjusts the A2DP LDAC codec, based on local support and Bluetooth
140// specification.
141// |p_codec_info| contains the codec information to adjust.
142// Returns true if |p_codec_info| is valid and supported, otherwise false.
143bool A2DP_VendorAdjustCodecLdac(uint8_t* p_codec_info);
144
145// Gets the A2DP LDAC Source codec index for a given |p_codec_info|.
146// Returns the corresponding |btav_a2dp_codec_index_t| on success,
147// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|.
148btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndexLdac(
149    const uint8_t* p_codec_info);
150
151// Gets the A2DP LDAC Source codec name.
152const char* A2DP_VendorCodecIndexStrLdac(void);
153
154// Initializes A2DP LDAC Source codec information into |tAVDT_CFG|
155// configuration entry pointed by |p_cfg|.
156bool A2DP_VendorInitCodecConfigLdac(tAVDT_CFG* p_cfg);
157
158#endif  // A2DP_VENDOR_LDAC_H
159