10.音频
===========

**10.1 音频接口介绍**
-----------

以SC-3568HA为例，该板卡的音频接口如下：

    |AUDIO_0|

**10.2 音频测试**
-----------

使用鸿蒙系统自带的测试命令测试音频是否正常：

+ 录制音频：

.. code-block:: bash
    :linenos:

    #创建test.wav文件
    ~# touch data/test.wav

    #录制音频
    ~# idl_capture data/test.wav
    ==================== Loading Mode ===================
    | 1. Passthrough Loading                               |
    | 2. IPC Loading                                       |
    ======================================================
    Please enter your choice:
    2
    ================= Audio Input Type ===============
    | 0. mic input type                                |
    | 1. speech wakeup input type                      |
    | 2. voice communication input typ                 |
    | 3. voice recognition input type                  |
    | 4. voice uplink input type                       |
    | 5. voice downlink input type                     |
    | 6. voice call input type                         |
    | 7. camcorder input type                          |
    | other. default input type                        |
    ==================================================
    Please enter your choice:
    0
    ================= Select Audio Card ==================
    1. primary
    ======================================================
    Please enter your choice:
    1
    ============== Play Capture select ===========
    | 1. Capture Poll                             |
    | 2. Capture Interrupt                        |
    ==============================================
    Please enter your choice:
    1
    ================== Play Capture Menu ==================
    | 1. Capture Start                                      |
    | 2. Capture Stop                                       |
    | 3. Capture Resume                                     |
    | 4. Capture Pause                                      |
    | 5. Capture SetVolume                                  |
    | 6. Capture SetGain                                    |
    | 7. Capture SetMute                                    |
    | 8. Capture SetAttributes                              |
    | 9. Capture SelectScene                                |
    | 10. Capture GetExtParams                              |
    | 11. Capture getMmapPosition                           |
    | 12.Exit                                               |
    =======================================================
    your choice is:

    1
    ============= Play Capture start Mode ==========
    | 1. Capture non-mmap                           |
    | 2. Capture mmap                               |
    ================================================
    Please enter your choice:
    1
    Start Successful
    ================== Play Capture Menu ==================
    | 1. Capture Start                                      |
    | 2. Capture Stop                                       |
    | 3. Capture Resume                                     |
    | 4. Capture Pause                                      |
    | 5. Capture SetVolume                                  |
    | 6. Capture SetGain                                    |
    | 7. Capture SetMute                                    |
    | 8. Capture SetAttributes                              |
    | 9. Capture SelectScene                                |
    | 10. Capture GetExtParams                              |
    | 11. Capture getMmapPosition                           |
    | 12.Exit                                               |
    =======================================================
    your choice is:


    Recording,the audio file size is 16Kb

    Recording,the audio file size is 512Kb

    Recording,the audio file size is 528Kb

    Recording,the audio file size is 1024Kb

    Recording,the audio file size is 1040Kb
    2
    Stop Successful
    ================== Play Capture Menu ==================
    | 1. Capture Start                                      |
    | 2. Capture Stop                                       |
    | 3. Capture Resume                                     |
    | 4. Capture Pause                                      |
    | 5. Capture SetVolume                                  |
    | 6. Capture SetGain                                    |
    | 7. Capture SetMute                                    |
    | 8. Capture SetAttributes                              |
    | 9. Capture SelectScene                                |
    | 10. Capture GetExtParams                              |
    | 11. Capture getMmapPosition                           |
    | 12.Exit                                               |
    =======================================================
    your choice is:

    12
    #录制完毕
    Record file path:/data/test.wav

+ 播放音频：

.. code-block:: bash
    :linenos:

    # idl_render data/test.wav
    ==================== Loading Mode ===================
    | 1. Passthrough Loading                               |
    | 2. IPC Loading                                       |
    ======================================================
    Please enter your choice:
    2
    ================= Select Audio Card ==================
    1. primary
    ======================================================
    Please enter your choice:
    1
    ================== Play Render Menu ==================
    | 1. Render Start                                      |
    | 2. Render Stop                                       |
    | 3. Render Resume                                     |
    | 4. Render Pause                                      |
    | 5. Render SetVolume                                  |
    | 6. Render GetGain                                    |
    | 7. Render SetMute                                    |
    | 8. Render SetAttributes                              |
    | 9. Render SelectScene                                |
    | 10. Render getEXtParams                              |
    | 11. Render getMmapPosition                           |
    | 12.Exit                                              |
    ======================================================
    your choice is:

    1
    Music channels = 2
    Music Rate     = 48000 Hz
    Music Bit      = 16 bit
    ============= Play Render Mode ==========
    | 1. Render non-mmap                     |
    | 2. Render mmap                         |
    ========================================
    Please enter your choice:
    1
    ../../drivers/peripheral/audio/test/sample/idl_render.c: [InitPlayingAudioParam]: [386]:[ERROR]:buffer size by calc is 16384
    Start Successful,Music is playing
    ================== Play Render Menu ==================
    | 1. Render Start                                      |
    | 2. Render Stop                                       |
    | 3. Render Resume                                     |
    | 4. Render Pause                                      |
    | 5. Render SetVolume                                  |
    | 6. Render GetGain                                    |
    | 7. Render SetMute                                    |
    | 8. Render SetAttributes                              |
    | 9. Render SelectScene                                |
    | 10. Render getEXtParams                              |
    | 11. Render getMmapPosition                           |
    | 12.Exit                                              |
    ======================================================
    your choice is:


    Play complete, please select input again
    Stop Successful


.. |AUDIO_0| image:: picture/AUDIO_0.png
   :width: 4in
   :height: 6.5in