1/*
2 * Copyright (C) 2015 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#pragma once
18
19#include "policy.h"
20#include <Volume.h>
21#include <system/audio.h>
22#include <convert/convert.h>
23#include <utils/Log.h>
24#include <string>
25#include <utils/Vector.h>
26#include <utils/SortedVector.h>
27
28namespace android {
29
30struct SampleRateTraits
31{
32    typedef uint32_t Type;
33    typedef SortedVector<Type> Collection;
34};
35struct DeviceTraits
36{
37    typedef audio_devices_t Type;
38    typedef Vector<Type> Collection;
39};
40struct OutputFlagTraits
41{
42    typedef audio_output_flags_t Type;
43    typedef Vector<Type> Collection;
44};
45struct InputFlagTraits
46{
47    typedef audio_input_flags_t Type;
48    typedef Vector<Type> Collection;
49};
50struct FormatTraits
51{
52    typedef audio_format_t Type;
53    typedef Vector<Type> Collection;
54};
55struct ChannelTraits
56{
57    typedef audio_channel_mask_t Type;
58    typedef SortedVector<Type> Collection;
59};
60struct OutputChannelTraits : public ChannelTraits {};
61struct InputChannelTraits : public ChannelTraits {};
62struct ChannelIndexTraits : public ChannelTraits {};
63struct GainModeTraits
64{
65    typedef audio_gain_mode_t Type;
66    typedef Vector<Type> Collection;
67};
68struct StreamTraits
69{
70  typedef audio_stream_type_t Type;
71  typedef Vector<Type> Collection;
72};
73struct DeviceCategoryTraits
74{
75  typedef device_category Type;
76  typedef Vector<Type> Collection;
77};
78template <typename T>
79struct DefaultTraits
80{
81  typedef T Type;
82  typedef Vector<Type> Collection;
83};
84
85template <class Traits>
86static void collectionFromString(const std::string &str, typename Traits::Collection &collection,
87                                 const char *del = "|")
88{
89    char *literal = strdup(str.c_str());
90    for (const char *cstr = strtok(literal, del); cstr != NULL; cstr = strtok(NULL, del)) {
91        typename Traits::Type value;
92        if (utilities::convertTo<std::string, typename Traits::Type >(cstr, value)) {
93            collection.add(value);
94        }
95    }
96    free(literal);
97}
98
99template <class Traits>
100class TypeConverter
101{
102public:
103    static bool toString(const typename Traits::Type &value, std::string &str);
104
105    static bool fromString(const std::string &str, typename Traits::Type &result);
106
107    static void collectionFromString(const std::string &str,
108                                     typename Traits::Collection &collection,
109                                     const char *del = "|");
110
111    static uint32_t maskFromString(const std::string &str, const char *del = "|");
112
113protected:
114    struct Table {
115        const char *literal;
116        typename Traits::Type value;
117    };
118
119    static const Table mTable[];
120    static const size_t mSize;
121};
122
123typedef TypeConverter<DeviceTraits> DeviceConverter;
124typedef TypeConverter<OutputFlagTraits> OutputFlagConverter;
125typedef TypeConverter<InputFlagTraits> InputFlagConverter;
126typedef TypeConverter<FormatTraits> FormatConverter;
127typedef TypeConverter<OutputChannelTraits> OutputChannelConverter;
128typedef TypeConverter<InputChannelTraits> InputChannelConverter;
129typedef TypeConverter<ChannelIndexTraits> ChannelIndexConverter;
130typedef TypeConverter<GainModeTraits> GainModeConverter;
131typedef TypeConverter<StreamTraits> StreamTypeConverter;
132typedef TypeConverter<DeviceCategoryTraits> DeviceCategoryConverter;
133
134static SampleRateTraits::Collection samplingRatesFromString(const std::string &samplingRates,
135                                                            const char *del = "|")
136{
137    SampleRateTraits::Collection samplingRateCollection;
138    collectionFromString<SampleRateTraits>(samplingRates, samplingRateCollection, del);
139    return samplingRateCollection;
140}
141
142static FormatTraits::Collection formatsFromString(const std::string &formats, const char *del = "|")
143{
144    FormatTraits::Collection formatCollection;
145    FormatConverter::collectionFromString(formats, formatCollection, del);
146    return formatCollection;
147}
148
149static audio_format_t formatFromString(const std::string &literalFormat)
150{
151    audio_format_t format;
152    if (literalFormat.empty()) {
153        return gDynamicFormat;
154    }
155    FormatConverter::fromString(literalFormat, format);
156    return format;
157}
158
159static audio_channel_mask_t channelMaskFromString(const std::string &literalChannels)
160{
161    audio_channel_mask_t channels;
162    if (!OutputChannelConverter::fromString(literalChannels, channels) ||
163            !InputChannelConverter::fromString(literalChannels, channels)) {
164        return AUDIO_CHANNEL_INVALID;
165    }
166    return channels;
167}
168
169static ChannelTraits::Collection channelMasksFromString(const std::string &channels,
170                                                        const char *del = "|")
171{
172    ChannelTraits::Collection channelMaskCollection;
173    OutputChannelConverter::collectionFromString(channels, channelMaskCollection, del);
174    InputChannelConverter::collectionFromString(channels, channelMaskCollection, del);
175    ChannelIndexConverter::collectionFromString(channels, channelMaskCollection, del);
176    return channelMaskCollection;
177}
178
179static InputChannelTraits::Collection inputChannelMasksFromString(const std::string &inChannels,
180                                                                  const char *del = "|")
181{
182    InputChannelTraits::Collection inputChannelMaskCollection;
183    InputChannelConverter::collectionFromString(inChannels, inputChannelMaskCollection, del);
184    ChannelIndexConverter::collectionFromString(inChannels, inputChannelMaskCollection, del);
185    return inputChannelMaskCollection;
186}
187
188static OutputChannelTraits::Collection outputChannelMasksFromString(const std::string &outChannels,
189                                                                    const char *del = "|")
190{
191    OutputChannelTraits::Collection outputChannelMaskCollection;
192    OutputChannelConverter::collectionFromString(outChannels, outputChannelMaskCollection, del);
193    ChannelIndexConverter::collectionFromString(outChannels, outputChannelMaskCollection, del);
194    return outputChannelMaskCollection;
195}
196
197}; // namespace android
198
199