53 lines
934 B
C
53 lines
934 B
C
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#ifndef _ALSA_DEV_H_
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#define _ALSA_DEV_H_
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#include <string>
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#include <alsa/asoundlib.h>
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namespace alsa {
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void vol_scaler_run(int16_t *buf, int n, int volume);
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struct Config {
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char device[20];
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int channels;
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int rate;
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snd_pcm_format_t format;
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unsigned int buffer_time;
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unsigned int period_time;
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};
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class AlsaDev
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{
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public:
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AlsaDev();
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~AlsaDev();
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int applyConfig(Config &config);
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int init(snd_pcm_stream_t type);
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void destory();
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// 样本点大小(字节)
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int getSampleSize();
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// 一帧的大小(字节)
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int getFrameSize();
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// 每周期包含的帧数
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int getFrames();
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// 内部缓冲区大小(帧)
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int getHwBufferSize();
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// alsa配置转为字符串输出
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const char *configToString();
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int write(uint8_t *data, size_t bytes);
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int read(uint8_t *data, size_t bytes);
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private:
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class Private;
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Private *d_ptr;
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};
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}
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#endif
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