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10c1c5f963
kernel: Revert net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends See: https://github.com/raspberrypi/linux/pull/2717 kernel: thermal: add hysteresis support and adjust PoE HAT trip points See: https://github.com/raspberrypi/linux/pull/2700 kernel: Add composite RPi driver for pcm512x DAC HAT cards See: https://github.com/raspberrypi/linux/pull/2702 firmware: jpeg/mjpeg: MJPEG doesn't insert JFIF APP0 header See: https://github.com/raspberrypi/userland/issues/345 firmware: Add IL HVS component firmware: mmal: Acquire zero copy buffers on being passed to the VPU firmware: video_render: Use per pixel alpha on RGBA and BGRA firmware: video_render: Add support for alpha options (MIX and PREMULT)
107 lines
5.3 KiB
HTML
107 lines
5.3 KiB
HTML
<html>
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<head>
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<title>hvs</title>
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<body>
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<table border="0" cellpadding="10"><tr valign="top"><td>
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<table border="0" cellspacing="0" cellpadding="1"><tr>
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<td bgcolor="#e0c0c0"><a href="index.html">Top</a><br>
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<tr><td bgcolor="#c0e0e0">
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<a href="audio_capture.html">audio_capture</a><br>
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<a href="audio_decode.html">audio_decode</a><br>
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<a href="audio_encode.html">audio_encode</a><br>
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<a href="audio_lowpower.html">audio_lowpower</a><br>
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<a href="audio_mixer.html">audio_mixer</a><br>
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<a href="audio_processor.html">audio_processor</a><br>
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<a href="audio_render.html">audio_render</a><br>
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<a href="audio_splitter.html">audio_splitter</a><br>
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<tr><td bgcolor="#e0c0c0">
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<a href="image_decode.html">image_decode</a><br>
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<a href="image_encode.html">image_encode</a><br>
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<a href="image_fx.html">image_fx</a><br>
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<a href="resize.html">resize</a><br>
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<a href="source.html">source</a><br>
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<a href="transition.html">transition</a><br>
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<tr><td bgcolor="#c0e0e0">
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<a href="clock.html">clock</a><br>
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<a href="null_sink.html">null_sink</a><br>
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<a href="text_scheduler.html">text_scheduler</a><br>
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<a href="visualisation.html">visualisation</a><br>
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<tr><td bgcolor="#e0c0c0">
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<a href="camera.html">camera</a><br>
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<a href="egl_render.html">egl_render</a><br>
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<a href="hvs.html">hvs</a><br>
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<a href="isp.html">isp</a><br>
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<a href="rawcam.html">rawcam</a><br>
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<a href="video_decode.html">video_decode</a><br>
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<a href="video_encode.html">video_encode</a><br>
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<a href="video_render.html">video_render</a><br>
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<a href="video_scheduler.html">video_scheduler</a><br>
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<a href="video_splitter.html">video_splitter</a><br>
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<tr><td bgcolor="#c0e0e0">
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<a href="prop.html">Custom Index</a><br>
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<a href="metadata.html">Metadata</a><br>
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</table><td>
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<h1>OMX.broadcom.hvs</h1>
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<p>
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<p>
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This component wraps the HVS (Hardware Video Scalar) hardware block to
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offer hardware accelerated format conversion, blending, and resizing.
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It has four inputs port taking numerous different formats, and one output port
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which supports various RGB formats.
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<p>
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Port 380 can be considered the master input port. When both ports 380 and 385
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have a bufferthen the component will generate the output buffer based on the
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current set of buffers and parameters.
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The additional input ports are used for providing extra items to be composed
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into the output image. The ports are double-bufferred, only returning a buffer
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once a new one has been sent to replace it. Sending an empty buffer to
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these ports will return the current buffer and stop that port contributing to
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the output image.
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<p>
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Please note that this component has been developed for use under MMAL. It has
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not been tested at all under IL, so there may be unexpected behaviour under IL.
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It is also not considered to be production quality code yet - please use with caution.
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<p>
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<p>
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<table border="1" cellspacing="0" cellpadding="2"><tr><td>Port<td>Index<td>Notes
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<tr valign="top"><td rowspan="6">380 381 382 383 384<td><tt>OMX_IndexParamPortDefinition</tt>
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<td> Set this to control the geometry and format of the input buffers.
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The stripe height requirements vary based on format, but must be
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>= <tt>nFrameHeight</tt>.
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As an exception to the IL spec, this component supports updating this parameter
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in any state. Buffer presented to the port will be interpreted with the settings
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defined when the buffer is presented.
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<tr valign="top"><td><tt><a href="prop.html#OMX_IndexConfigDisplayRegion">OMX_IndexConfigDisplayRegion</a></tt>
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<td> Setting this config allows control over how buffers passed on that port
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contribute to the output frame.
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Source rectangles may currently not take into account any cropping required by
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a decoder.
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It does not support the OMX_DISPLAY_MODE_FILL and OMX_DISPLAY_MODE_LETTERBOX
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flags.
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It assumes that OMX_DISPLAY_SET_NOASPECT is set, ie it will distort the image to
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map the source/source rectangle into the destination rectangle.
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Buffers will be displayed with the value of OMX_IndexConfigDisplayRegion set at
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the point the buffer is submitted, even if it is subsequently updated.
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<tr valign="top"><td><tt><a href="prop.html#OMX_IndexParamColorSpace">OMX_IndexParamColorSpace</a></tt>
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<td> Set/retrieve the image colour space settings that images received on
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this port should be rendered with.
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<tr valign="top"><td><tt><a href="prop.html#OMX_IndexParamCameraPoolToEncoderFunction">OMX_IndexParamCameraPoolToEncoderFunction</a></tt>
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<td> Used to set up proprietary communication with the previous component.
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<tr valign="top"><td><tt><a href="prop.html#OMX_IndexConfigBrcmUseProprietaryCallback">OMX_IndexConfigBrcmUseProprietaryCallback</a></tt>
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<td> Forces use of proprietary tunnelling between ports.
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<tr valign="top"><td><tt><a href="prop.html#OMX_IndexParamBrcmSupportsUnalignedSliceheight">OMX_IndexParamBrcmSupportsUnalignedSliceheight</a></tt>
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<td> Retrieves the capabilites of this component to allow any
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nSliceHeight value >= nHeight.
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<tr valign="top"><td rowspan="1">385<td><tt>OMX_IndexParamPortDefinition</tt>
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<td> Set / query this to control the geometry and format of the output buffers.
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<tr valign="top"><td rowspan="2">380 381 382 383 384 385<td><tt><a href="prop.html#OMX_IndexParamMinimumAlignment">OMX_IndexParamMinimumAlignment</a></tt>
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<td> Query the minimum alignment that the component requries on the port.
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<tr valign="top"><td><tt>OMX_IndexParamVideoPortFormat</tt>
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<td> Set / query the image port format used.
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</table>
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</table>
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</body>
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</html>
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