1/*
2 * Copyright (C) 2010 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#include "math.h"
18
19#include <system/audio.h>
20
21//-----------------------------------------------------------------------------
22// OpenSL ES to Android
23//----------------------
24
25static inline uint32_t sles_to_android_sampleRate(SLuint32 sampleRateMilliHertz) {
26    return (uint32_t)(sampleRateMilliHertz / 1000);
27}
28
29static inline audio_format_t sles_to_android_sampleFormat(const SLDataFormat_PCM *df_pcm) {
30    if (df_pcm->containerSize != df_pcm->bitsPerSample) {
31        return AUDIO_FORMAT_INVALID;
32    }
33    switch (df_pcm->formatType) {
34    case SL_DATAFORMAT_PCM:
35        switch (df_pcm->containerSize) {
36        case 8:
37            return AUDIO_FORMAT_PCM_8_BIT;
38        case 16:
39            return AUDIO_FORMAT_PCM_16_BIT;
40        case 24:
41            return AUDIO_FORMAT_PCM_24_BIT_PACKED;
42        case 32:
43            return AUDIO_FORMAT_PCM_32_BIT;
44        default:
45            return AUDIO_FORMAT_INVALID;
46        }
47    case SL_ANDROID_DATAFORMAT_PCM_EX:
48        switch (((SLAndroidDataFormat_PCM_EX *)df_pcm)->representation) {
49        case SL_ANDROID_PCM_REPRESENTATION_UNSIGNED_INT:
50            switch (df_pcm->containerSize) {
51            case 8:
52                return AUDIO_FORMAT_PCM_8_BIT;
53            default:
54                return AUDIO_FORMAT_INVALID;
55            }
56        case SL_ANDROID_PCM_REPRESENTATION_SIGNED_INT:
57            switch (df_pcm->containerSize) {
58            case 16:
59                return AUDIO_FORMAT_PCM_16_BIT;
60            case 24:
61                return AUDIO_FORMAT_PCM_24_BIT_PACKED;
62            case 32:
63                return AUDIO_FORMAT_PCM_32_BIT;
64            default:
65                return AUDIO_FORMAT_INVALID;
66            }
67        case SL_ANDROID_PCM_REPRESENTATION_FLOAT:
68            switch (df_pcm->containerSize) {
69            case 32:
70                return AUDIO_FORMAT_PCM_FLOAT;
71            default:
72                return AUDIO_FORMAT_INVALID;
73            }
74        default:
75            return AUDIO_FORMAT_INVALID;
76        }
77    default:
78        return AUDIO_FORMAT_INVALID;
79    }
80}
81
82
83static inline float sles_to_android_amplification(SLmillibel level) {
84    // FIXME use the FX Framework conversions
85    return pow(10, (float)level/2000);
86}
87