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