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214 lines
11 KiB
ReStructuredText
214 lines
11 KiB
ReStructuredText
:github_url: hide
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.. _class_ResourceImporterWAV:
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ResourceImporterWAV
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===================
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**继承:** :ref:`ResourceImporter<class_ResourceImporter>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
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导入 WAV 音频文件,用于播放。
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.. rst-class:: classref-introduction-group
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描述
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----
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WAV 是未经压缩的格式,能够提供比 Ogg Vorbis 和 MP3 更高的质量。解压时的 CPU 开销也最低。因此即便在低端设备上,也能够同时播放大量的 WAV 声音。
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默认情况下,Godot 使用有损的 Quite OK Audio 压缩导入 WAV 文件。可以通过设置 :ref:`compress/mode<class_ResourceImporterWAV_property_compress/mode>` 属性来更改。
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.. rst-class:: classref-introduction-group
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教程
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----
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- :doc:`导入音频样本 <../tutorials/assets_pipeline/importing_audio_samples>`
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.. rst-class:: classref-reftable-group
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属性
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----
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.. table::
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:widths: auto
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`int<class_int>` | :ref:`compress/mode<class_ResourceImporterWAV_property_compress/mode>` | ``2`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`int<class_int>` | :ref:`edit/loop_begin<class_ResourceImporterWAV_property_edit/loop_begin>` | ``0`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`int<class_int>` | :ref:`edit/loop_end<class_ResourceImporterWAV_property_edit/loop_end>` | ``-1`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`int<class_int>` | :ref:`edit/loop_mode<class_ResourceImporterWAV_property_edit/loop_mode>` | ``0`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`bool<class_bool>` | :ref:`edit/normalize<class_ResourceImporterWAV_property_edit/normalize>` | ``false`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`bool<class_bool>` | :ref:`edit/trim<class_ResourceImporterWAV_property_edit/trim>` | ``false`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`bool<class_bool>` | :ref:`force/8_bit<class_ResourceImporterWAV_property_force/8_bit>` | ``false`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`bool<class_bool>` | :ref:`force/max_rate<class_ResourceImporterWAV_property_force/max_rate>` | ``false`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`float<class_float>` | :ref:`force/max_rate_hz<class_ResourceImporterWAV_property_force/max_rate_hz>` | ``44100`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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| :ref:`bool<class_bool>` | :ref:`force/mono<class_ResourceImporterWAV_property_force/mono>` | ``false`` |
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+---------------------------+--------------------------------------------------------------------------------+-----------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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属性说明
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--------
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.. _class_ResourceImporterWAV_property_compress/mode:
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.. rst-class:: classref-property
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:ref:`int<class_int>` **compress/mode** = ``2`` :ref:`🔗<class_ResourceImporterWAV_property_compress/mode>`
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导入时使用的压缩模式。
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- **PCM (Uncompressed):**\ 导入音频数据,不进行压缩,保持尽可能高的质量。CPU 开销最低,但内存占用最高。
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- **IMA ADPCM:**\ 导入时进行快速有损压缩,显著降低质量,但是 CPU 开销和内存占用都较低。不支持跳转,仅支持 Forward 循环模式。
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- **\ `Quite OK Audio <https://qoaformat.org/>`__\ :**\ 导入时也会进行有损压缩,CPU 开销比 IMA ADPCM 略高,但是质量要高很多,内存占用也最低。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_edit/loop_begin:
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.. rst-class:: classref-property
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:ref:`int<class_int>` **edit/loop_begin** = ``0`` :ref:`🔗<class_ResourceImporterWAV_property_edit/loop_begin>`
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循环起始点,\ :ref:`edit/loop_mode<class_ResourceImporterWAV_property_edit/loop_mode>` 为 **Forward**\ 、\ **Ping-Pong**\ 、或 **Backward** 时使用。设置的是音频文件开始之后的采样数。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_edit/loop_end:
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.. rst-class:: classref-property
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:ref:`int<class_int>` **edit/loop_end** = ``-1`` :ref:`🔗<class_ResourceImporterWAV_property_edit/loop_end>`
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循环结束点,\ :ref:`edit/loop_mode<class_ResourceImporterWAV_property_edit/loop_mode>` 为 **Forward**\ 、\ **Ping-Pong**\ 、或 **Backward** 时使用。设置的是音频文件开始之后的采样数。\ ``-1`` 表示使用音频文件的末尾作为循环结束点。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_edit/loop_mode:
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.. rst-class:: classref-property
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:ref:`int<class_int>` **edit/loop_mode** = ``0`` :ref:`🔗<class_ResourceImporterWAV_property_edit/loop_mode>`
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控制音频如何循环。
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- **Detect From WAV:**\ 使用 WAV 元数据中的循环信息。
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- **Disabled:**\ 不循环音频,即便元数据显示该文件应该在播放时循环。
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- **Forward:**\ 标准音频循环。从头开始正向播放音频至 :ref:`edit/loop_end<class_ResourceImporterWAV_property_edit/loop_end>`\ ,然后回到 :ref:`edit/loop_begin<class_ResourceImporterWAV_property_edit/loop_begin>` 再进行重复。
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- **Ping-Pong:**\ 正向播放音频至 :ref:`edit/loop_end<class_ResourceImporterWAV_property_edit/loop_end>`\ ,然后逆向播放至 :ref:`edit/loop_begin<class_ResourceImporterWAV_property_edit/loop_begin>`\ ,再重复这一循环。
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- **Backward:**\ 从 :ref:`edit/loop_end<class_ResourceImporterWAV_property_edit/loop_end>` 至 :ref:`edit/loop_begin<class_ResourceImporterWAV_property_edit/loop_begin>` 逆向播放音频,再进行重复。
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\ **注意:**\ 在 :ref:`AudioStreamPlayer<class_AudioStreamPlayer>` 中,循环音频到达音频文件末尾时不会发出 :ref:`AudioStreamPlayer.finished<class_AudioStreamPlayer_signal_finished>` 信号,因为音频会无限循环播放。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_edit/normalize:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **edit/normalize** = ``false`` :ref:`🔗<class_ResourceImporterWAV_property_edit/normalize>`
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如果为 ``true``\ ,则会将音频音量进行归一化,让最高音量等于 0 dB。启用后,音频听起来会更响,具体取决于原始的最高音量。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_edit/trim:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **edit/trim** = ``false`` :ref:`🔗<class_ResourceImporterWAV_property_edit/trim>`
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如果为 ``true``\ ,则会自动修剪掉音频开头和结尾处归一化后低于 -50 dB 的部分(见 :ref:`edit/normalize<class_ResourceImporterWAV_property_edit/normalize>`\ )。这样就能够避免出现文件开头和结尾出现空白的情况,这种情况会占用不必要的文件大小,同时也会在播放时导致延迟。修剪时还会使用 500 个采样进行淡入/淡出,避免产生爆音。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_force/8_bit:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **force/8_bit** = ``false`` :ref:`🔗<class_ResourceImporterWAV_property_force/8_bit>`
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如果为 ``true``\ ,则会在源文件至少为 16 位时,强制让导入的音频使用 8 位量化。
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通常不建议启用,因为 8 位量化会显著降低音质。如果你需要让文件大小更小,请考虑改用 Ogg Vorbis 或 MP3 音频。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_force/max_rate:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **force/max_rate** = ``false`` :ref:`🔗<class_ResourceImporterWAV_property_force/max_rate>`
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如果设成比 ``0`` 大的值,则会强制让音频的采样率降低至小于等于 :ref:`force/max_rate_hz<class_ResourceImporterWAV_property_force/max_rate_hz>` 的值。
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可以让部分声音在不影响音质的同时降低文件大小,具体取决于声音的内容。详见\ `《最佳实践》 <../tutorials/assets_pipeline/importing_audio_samples.html#doc-importing-audio-samples-best-practices>`__\ 。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_force/max_rate_hz:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **force/max_rate_hz** = ``44100`` :ref:`🔗<class_ResourceImporterWAV_property_force/max_rate_hz>`
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导入音频采样的频率限制(单位为赫兹)。仅当 :ref:`force/max_rate<class_ResourceImporterWAV_property_force/max_rate>` 为 ``true`` 时有效。
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.. rst-class:: classref-item-separator
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----
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.. _class_ResourceImporterWAV_property_force/mono:
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.. rst-class:: classref-property
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:ref:`bool<class_bool>` **force/mono** = ``false`` :ref:`🔗<class_ResourceImporterWAV_property_force/mono>`
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如果为 ``true``\ ,则会在源文件为立体声时,强制让导入的音频使用单声道。将两个声道合并能够将文件大小降低 50%。
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.. |virtual| replace:: :abbr:`virtual (本方法通常需要用户覆盖才能生效。)`
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.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
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.. |const| replace:: :abbr:`const (本方法无副作用,不会修改该实例的任何成员变量。)`
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.. |vararg| replace:: :abbr:`vararg (本方法除了能接受在此处描述的参数外,还能够继续接受任意数量的参数。)`
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.. |constructor| replace:: :abbr:`constructor (本方法用于构造某个类型。)`
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.. |static| replace:: :abbr:`static (调用本方法无需实例,可直接使用类名进行调用。)`
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.. |operator| replace:: :abbr:`operator (本方法描述的是使用本类型作为左操作数的有效运算符。)`
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.. |bitfield| replace:: :abbr:`BitField (这个值是由下列位标志构成位掩码的整数。)`
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.. |void| replace:: :abbr:`void (无返回值。)`
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