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2025-09-10 13:40:11 +08:00
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sodipodi:role="line">The backend buffer is made up of 1 or more (usually 3) periods.</tspan><tspan
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sodipodi:role="line">depending on what the backend driver requests. If there is</tspan><tspan
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sodipodi:role="line">insufficient data in the ring buffer, the callback will poll it for</tspan><tspan
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sodipodi:role="line">more data. If not enough data arrives for that period, playback</tspan><tspan
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sodipodi:role="line">Next block to be written</tspan><tspan
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y="34.992069"
x="234.88477"
sodipodi:role="line"><tspan
id="tspan3274"
style="font-style:italic">Sample</tspan> = Single unit of audio data, typically an I16 or SGL</tspan><tspan
id="tspan3252"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333px;font-family:Calibri;-inkscape-font-specification:Calibri;text-align:start;text-anchor:start;stroke-width:0.264583"
y="40.28373"
x="234.88477"
sodipodi:role="line"><tspan
id="tspan3256"
style="font-style:italic">Frame</tspan> = Group of samples equal to number of channels</tspan><tspan
id="tspan3250"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333px;font-family:Calibri;-inkscape-font-specification:Calibri;text-align:start;text-anchor:start;stroke-width:0.264583"
y="45.575394"
x="234.88477"
sodipodi:role="line"><tspan
id="tspan3258"
style="font-style:italic">Period</tspan> = 10ms of frames (sample rate / 100).</tspan><tspan
id="tspan3248"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333px;font-family:Calibri;-inkscape-font-specification:Calibri;text-align:start;text-anchor:start;stroke-width:0.264583"
y="50.867058"
x="234.88477"
sodipodi:role="line"> Typically 441 or 480 frames.</tspan></text>
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