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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROFILE_H
#define ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROFILE_H
#include <stdbool.h>
#include <tinyalsa/asoundlib.h>
#define MAX_PROFILE_FORMATS 6 /* We long support the 5 standard formats defined
* in asound.h, so we just need this to be 1 more
* than that */
#define MAX_PROFILE_SAMPLE_RATES 14 /* this number needs to be 1 more than the number of
* sample rates in std_sample_rates[]
* (in alsa_device_profile.c) */
#define MAX_PROFILE_CHANNEL_COUNTS 9 /* this number need to be 1 more than the number of
* standard channel formats in std_channel_counts[]
* (in alsa_device_profile.c) */
#define DEFAULT_SAMPLE_RATE 44100
#define DEFAULT_SAMPLE_FORMAT PCM_FORMAT_S16_LE
#define DEFAULT_CHANNEL_COUNT 2
typedef struct {
int card;
int device;
int direction; /* PCM_OUT or PCM_IN */
enum pcm_format formats[MAX_PROFILE_FORMATS];
unsigned sample_rates[MAX_PROFILE_SAMPLE_RATES];
unsigned channel_counts[MAX_PROFILE_CHANNEL_COUNTS];
bool is_valid;
/* read from the hardware device */
struct pcm_config default_config;
unsigned min_period_size;
unsigned max_period_size;
unsigned min_channel_count;
unsigned max_channel_count;
} alsa_device_profile;
void profile_init(alsa_device_profile* profile, int direction);
bool profile_is_initialized(alsa_device_profile* profile);
bool profile_is_valid(alsa_device_profile* profile);
bool profile_is_cached_for(alsa_device_profile* profile, int card, int device);
void profile_decache(alsa_device_profile* profile);
bool profile_read_device_info(alsa_device_profile* profile);
/* Audio Config Strings Methods */
char * profile_get_sample_rate_strs(alsa_device_profile* profile);
char * profile_get_format_strs(alsa_device_profile* profile);
char * profile_get_channel_count_strs(alsa_device_profile* profile);
/* Sample Rate Methods */
unsigned profile_get_default_sample_rate(alsa_device_profile* profile);
bool profile_is_sample_rate_valid(alsa_device_profile* profile, unsigned rate);
/* Format Methods */
enum pcm_format profile_get_default_format(alsa_device_profile* profile);
bool profile_is_format_valid(alsa_device_profile* profile, enum pcm_format fmt);
/* Channel Methods */
unsigned profile_get_default_channel_count(alsa_device_profile* profile);
bool profile_is_channel_count_valid(alsa_device_profile* profile, unsigned count);
/* Utility */
unsigned profile_calc_min_period_size(alsa_device_profile* profile, unsigned sample_rate);
unsigned int profile_get_period_size(alsa_device_profile* profile, unsigned sample_rate);
#endif /* ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROFILE_H */
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