1 /* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
2  * Use of this source code is governed by a BSD-style license that can be
3  * found in the LICENSE file.
4  */
5 
6 #ifndef COMMON_CRAS_AUDIO_CODEC_H_
7 #define COMMON_CRAS_AUDIO_CODEC_H_
8 
9 /* A audio codec that transforms audio between different formats.
10  * decode - Function to decode audio samples. Returns the number of decoded
11  *   bytes of input buffer, number of decoded bytes of output buffer
12  *   will be filled in count.
13  * encode - Function to encode audio samples. Returns the number of encoded
14  *   bytes of input buffer, number of encoded bytes of output buffer
15  *   will be filled in count.
16  * priv_data - Private data for specific use.
17  */
18 struct cras_audio_codec {
19 	int (*decode)(struct cras_audio_codec *codec, const void *input,
20 		      size_t input_len, void *output, size_t output_len,
21 		      size_t *count);
22 	int (*encode)(struct cras_audio_codec *codec, const void *input,
23 		      size_t intput_len, void *output, size_t output_len,
24 		      size_t *count);
25 	void *priv_data;
26 };
27 
28 #endif /* COMMON_CRAS_AUDIO_CODEC_H_ */
29