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authorJack Chen2019-10-21 12:50:17 +0800
committerJack Chen2019-10-21 13:14:14 +0800
commit31924ce96d14060ba4d77dcec811dc3a84196273 (patch)
tree9a3824034c8783e512ab0e41a337bffd9a14d2dc /media_codecs.xml
downloadaur-31924ce96d14060ba4d77dcec811dc3a84196273.tar.gz
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+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright (C) 2012 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!--
+<!DOCTYPE MediaCodecs [
+<!ELEMENT Include EMPTY>
+<!ATTLIST Include href CDATA #REQUIRED>
+<!ELEMENT MediaCodecs (Decoders|Encoders|Include)*>
+<!ELEMENT Decoders (MediaCodec|Include)*>
+<!ELEMENT Encoders (MediaCodec|Include)*>
+<!ELEMENT MediaCodec (Type|Quirk|Include)*>
+<!ATTLIST MediaCodec name CDATA #REQUIRED>
+<!ATTLIST MediaCodec type CDATA>
+<!ELEMENT Type EMPTY>
+<!ATTLIST Type name CDATA #REQUIRED>
+<!ELEMENT Quirk EMPTY>
+<!ATTLIST Quirk name CDATA #REQUIRED>
+]>
+
+There's a simple and a complex syntax to declare the availability of a
+media codec:
+
+A codec that properly follows the OpenMax spec and therefore doesn't have any
+quirks and that only supports a single content type can be declared like so:
+
+ <MediaCodec name="OMX.foo.bar" type="something/interesting" />
+
+If a codec has quirks OR supports multiple content types, the following syntax
+can be used:
+
+ <MediaCodec name="OMX.foo.bar" >
+ <Type name="something/interesting" />
+ <Type name="something/else" />
+ ...
+ <Quirk name="requires-allocate-on-input-ports" />
+ <Quirk name="requires-allocate-on-output-ports" />
+ <Quirk name="output-buffers-are-unreadable" />
+ </MediaCodec>
+
+Only the three quirks included above are recognized at this point:
+
+"requires-allocate-on-input-ports"
+ must be advertised if the component does not properly support specification
+ of input buffers using the OMX_UseBuffer(...) API but instead requires
+ OMX_AllocateBuffer to be used.
+
+"requires-allocate-on-output-ports"
+ must be advertised if the component does not properly support specification
+ of output buffers using the OMX_UseBuffer(...) API but instead requires
+ OMX_AllocateBuffer to be used.
+
+"output-buffers-are-unreadable"
+ must be advertised if the emitted output buffers of a decoder component
+ are not readable, i.e. use a custom format even though abusing one of
+ the official OMX colorspace constants.
+ Clients of such decoders will not be able to access the decoded data,
+ naturally making the component much less useful. The only use for
+ a component with this quirk is to render the output to the screen.
+ Audio decoders MUST NOT advertise this quirk.
+ Video decoders that advertise this quirk must be accompanied by a
+ corresponding color space converter for thumbnail extraction,
+ matching surfaceflinger support that can render the custom format to
+ a texture and possibly other code, so just DON'T USE THIS QUIRK.
+
+-->
+
+<MediaCodecs>
+ <Settings>
+ <Setting name="supports-multiple-secure-codecs" value="true" />
+ <Setting name="supports-secure-with-non-secure-codec" value="true" />
+ <Setting name="max-video-encoder-input-buffers" value="9" />
+ </Settings>
+ <Include href="media_codecs_google_video.xml" />
+ <Include href="media_codecs_google_audio.xml" />
+ <Include href="media_codecs_google_telephony.xml" />
+</MediaCodecs>