1 /******************************************************************************
2  *
3  *  Copyright 2004-2012 Broadcom Corporation
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 /******************************************************************************
20  *
21  *  This is the interface to utility functions for dealing with SBC data
22  *  frames and codec capabilities.
23  *
24  ******************************************************************************/
25 #ifndef A2DP_SBC_UP_SAMPLE_H
26 #define A2DP_SBC_UP_SAMPLE_H
27 
28 #include <stdint.h>
29 
30 /*******************************************************************************
31  *
32  * Function         a2dp_sbc_init_up_sample
33  *
34  * Description      initialize the up sample
35  *
36  *                  src_sps: samples per second (source audio data)
37  *                  dst_sps: samples per second (converted audio data)
38  *                  bits: number of bits per pcm sample
39  *                  n_channels: number of channels (i.e. mono(1), stereo(2)...)
40  *
41  * Returns          none
42  *
43  ******************************************************************************/
44 void a2dp_sbc_init_up_sample(uint32_t src_sps, uint32_t dst_sps, uint8_t bits, uint8_t n_channels);
45 
46 /*******************************************************************************
47  *
48  * Function         a2dp_sbc_up_sample
49  *
50  * Description      Given the source (p_src) audio data and
51  *                  source speed (src_sps, samples per second),
52  *                  This function converts it to audio data in the desired
53  *                  format
54  *
55  *                  p_src: the data buffer that holds the source audio data
56  *                  p_dst: the data buffer to hold the converted audio data
57  *                  src_samples: The number of source samples (number of bytes)
58  *                  dst_samples: The size of p_dst (number of bytes)
59  *
60  * Note:            An AE reported an issue with this function.
61  *                  When called with a2dp_sbc_up_sample(src, uint8_array_dst..)
62  *                  the byte before uint8_array_dst may get overwritten.
63  *                  Using uint16_array_dst avoids the problem.
64  *                  This issue is related to endian-ness and is hard to resolve
65  *                  in a generic manner.
66  * **************** Please use uint16 array as dst.
67  *
68  * Returns          The number of bytes used in p_dst
69  *                  The number of bytes used in p_src (in *p_ret)
70  *
71  ******************************************************************************/
72 int a2dp_sbc_up_sample(void* p_src, void* p_dst, uint32_t src_samples, uint32_t dst_samples,
73                        uint32_t* p_ret);
74 
75 /*******************************************************************************
76  *
77  * Function         a2dp_sbc_up_sample_16s (16bits-stereo)
78  *
79  * Description      Given the source (p_src) audio data and
80  *                  source speed (src_sps, samples per second),
81  *                  This function converts it to audio data in the desired
82  *                  format
83  *
84  *                  p_src: the data buffer that holds the source audio data
85  *                  p_dst: the data buffer to hold the converted audio data
86  *                  src_samples: The number of source samples (in uint of 4
87  *                               bytes)
88  *                  dst_samples: The size of p_dst (in uint of 4 bytes)
89  *
90  * Returns          The number of bytes used in p_dst
91  *                  The number of bytes used in p_src (in *p_ret)
92  *
93  ******************************************************************************/
94 int a2dp_sbc_up_sample_16s(void* p_src, void* p_dst, uint32_t src_samples, uint32_t dst_samples,
95                            uint32_t* p_ret);
96 
97 /*******************************************************************************
98  *
99  * Function         a2dp_sbc_up_sample_16m (16bits-mono)
100  *
101  * Description      Given the source (p_src) audio data and
102  *                  source speed (src_sps, samples per second),
103  *                  This function converts it to audio data in the desired
104  *                  format
105  *
106  *                  p_src: the data buffer that holds the source audio data
107  *                  p_dst: the data buffer to hold the converted audio data
108  *                  src_samples: The number of source samples (in uint of 2
109  *                               bytes)
110  *                  dst_samples: The size of p_dst (in uint of 2 bytes)
111  *
112  * Returns          The number of bytes used in p_dst
113  *                  The number of bytes used in p_src (in *p_ret)
114  *
115  ******************************************************************************/
116 int a2dp_sbc_up_sample_16m(void* p_src, void* p_dst, uint32_t src_samples, uint32_t dst_samples,
117                            uint32_t* p_ret);
118 
119 /*******************************************************************************
120  *
121  * Function         a2dp_sbc_up_sample_8s (8bits-stereo)
122  *
123  * Description      Given the source (p_src) audio data and
124  *                  source speed (src_sps, samples per second),
125  *                  This function converts it to audio data in the desired
126  *                  format
127  *
128  *                  p_src: the data buffer that holds the source audio data
129  *                  p_dst: the data buffer to hold the converted audio data
130  *                  src_samples: The number of source samples (in uint of 2
131  *                               bytes)
132  *                  dst_samples: The size of p_dst (in uint of 2 bytes)
133  *
134  * Returns          The number of bytes used in p_dst
135  *                  The number of bytes used in p_src (in *p_ret)
136  *
137  ******************************************************************************/
138 int a2dp_sbc_up_sample_8s(void* p_src, void* p_dst, uint32_t src_samples, uint32_t dst_samples,
139                           uint32_t* p_ret);
140 
141 /*******************************************************************************
142  *
143  * Function         a2dp_sbc_up_sample_8m (8bits-mono)
144  *
145  * Description      Given the source (p_src) audio data and
146  *                  source speed (src_sps, samples per second),
147  *                  This function converts it to audio data in the desired
148  *                  format
149  *
150  *                  p_src: the data buffer that holds the source audio data
151  *                  p_dst: the data buffer to hold the converted audio data
152  *                  src_samples: The number of source samples (number of bytes)
153  *                  dst_samples: The size of p_dst (number of bytes)
154  *
155  * Returns          The number of bytes used in p_dst
156  *                  The number of bytes used in p_src (in *p_ret)
157  *
158  ******************************************************************************/
159 int a2dp_sbc_up_sample_8m(void* p_src, void* p_dst, uint32_t src_samples, uint32_t dst_samples,
160                           uint32_t* p_ret);
161 
162 #endif  // A2DP_SBC_UP_SAMPLE_H
163