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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_AUDIO_LINUX_ALSA_UTIL_H_
#define MEDIA_AUDIO_LINUX_ALSA_UTIL_H_
#include <alsa/asoundlib.h>
#include <string>
class AlsaWrapper;
namespace alsa_util {
snd_pcm_format_t BitsToFormat(int bits_per_sample);
snd_pcm_t* OpenCaptureDevice(AlsaWrapper* wrapper,
const char* device_name,
int channels,
int sample_rate,
snd_pcm_format_t pcm_format,
int latency_us);
snd_pcm_t* OpenPlaybackDevice(AlsaWrapper* wrapper,
const char* device_name,
int channels,
int sample_rate,
snd_pcm_format_t pcm_format,
int latency_us);
int CloseDevice(AlsaWrapper* wrapper, snd_pcm_t* handle);
snd_mixer_t* OpenMixer(AlsaWrapper* wrapper, const std::string& device_name);
void CloseMixer(AlsaWrapper* wrapper,
snd_mixer_t* mixer,
const std::string& device_name);
snd_mixer_elem_t* LoadCaptureMixerElement(AlsaWrapper* wrapper,
snd_mixer_t* mixer);
}
#endif // MEDIA_AUDIO_LINUX_ALSA_UTIL_H_
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