245 строки
8.5 KiB
XML
245 строки
8.5 KiB
XML
<refentry id="packed-yuv">
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<refmeta>
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<refentrytitle>Packed YUV formats</refentrytitle>
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&manvol;
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</refmeta>
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<refnamediv>
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<refname>Packed YUV formats</refname>
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<refpurpose>Packed YUV formats</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<para>Similar to the packed RGB formats these formats store
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the Y, Cb and Cr component of each pixel in one 16 or 32 bit
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word.</para>
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<table pgwide="1" frame="none">
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<title>Packed YUV Image Formats</title>
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<tgroup cols="37" align="center">
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<colspec colname="id" align="left" />
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<colspec colname="fourcc" />
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<colspec colname="bit" />
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<colspec colnum="4" colname="b07" align="center" />
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<colspec colnum="5" colname="b06" align="center" />
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<colspec colnum="6" colname="b05" align="center" />
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<colspec colnum="7" colname="b04" align="center" />
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<colspec colnum="8" colname="b03" align="center" />
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<colspec colnum="9" colname="b02" align="center" />
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<colspec colnum="10" colname="b01" align="center" />
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<colspec colnum="11" colname="b00" align="center" />
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<colspec colnum="13" colname="b17" align="center" />
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<colspec colnum="14" colname="b16" align="center" />
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<colspec colnum="15" colname="b15" align="center" />
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<colspec colnum="16" colname="b14" align="center" />
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<colspec colnum="17" colname="b13" align="center" />
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<colspec colnum="18" colname="b12" align="center" />
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<colspec colnum="19" colname="b11" align="center" />
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<colspec colnum="20" colname="b10" align="center" />
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<colspec colnum="22" colname="b27" align="center" />
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<colspec colnum="23" colname="b26" align="center" />
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<colspec colnum="24" colname="b25" align="center" />
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<colspec colnum="25" colname="b24" align="center" />
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<colspec colnum="26" colname="b23" align="center" />
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<colspec colnum="27" colname="b22" align="center" />
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<colspec colnum="28" colname="b21" align="center" />
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<colspec colnum="29" colname="b20" align="center" />
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<colspec colnum="31" colname="b37" align="center" />
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<colspec colnum="32" colname="b36" align="center" />
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<colspec colnum="33" colname="b35" align="center" />
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<colspec colnum="34" colname="b34" align="center" />
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<colspec colnum="35" colname="b33" align="center" />
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<colspec colnum="36" colname="b32" align="center" />
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<colspec colnum="37" colname="b31" align="center" />
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<colspec colnum="38" colname="b30" align="center" />
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<spanspec namest="b07" nameend="b00" spanname="b0" />
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<spanspec namest="b17" nameend="b10" spanname="b1" />
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<spanspec namest="b27" nameend="b20" spanname="b2" />
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<spanspec namest="b37" nameend="b30" spanname="b3" />
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<thead>
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<row>
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<entry>Identifier</entry>
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<entry>Code</entry>
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<entry> </entry>
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<entry spanname="b0">Byte 0 in memory</entry>
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<entry spanname="b1">Byte 1</entry>
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<entry spanname="b2">Byte 2</entry>
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<entry spanname="b3">Byte 3</entry>
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</row>
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<row>
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<entry> </entry>
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<entry> </entry>
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<entry>Bit</entry>
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<entry>7</entry>
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<entry>6</entry>
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<entry>5</entry>
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<entry>4</entry>
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<entry>3</entry>
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<entry>2</entry>
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<entry>1</entry>
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<entry>0</entry>
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<entry> </entry>
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<entry>7</entry>
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<entry>6</entry>
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<entry>5</entry>
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<entry>4</entry>
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<entry>3</entry>
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<entry>2</entry>
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<entry>1</entry>
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<entry>0</entry>
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<entry> </entry>
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<entry>7</entry>
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<entry>6</entry>
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<entry>5</entry>
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<entry>4</entry>
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<entry>3</entry>
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<entry>2</entry>
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<entry>1</entry>
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<entry>0</entry>
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<entry> </entry>
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<entry>7</entry>
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<entry>6</entry>
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<entry>5</entry>
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<entry>4</entry>
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<entry>3</entry>
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<entry>2</entry>
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<entry>1</entry>
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<entry>0</entry>
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</row>
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</thead>
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<tbody valign="top">
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<row id="V4L2-PIX-FMT-YUV444">
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<entry><constant>V4L2_PIX_FMT_YUV444</constant></entry>
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<entry>'Y444'</entry>
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<entry></entry>
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<entry>Cb<subscript>3</subscript></entry>
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<entry>Cb<subscript>2</subscript></entry>
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<entry>Cb<subscript>1</subscript></entry>
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<entry>Cb<subscript>0</subscript></entry>
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<entry>Cr<subscript>3</subscript></entry>
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<entry>Cr<subscript>2</subscript></entry>
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<entry>Cr<subscript>1</subscript></entry>
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<entry>Cr<subscript>0</subscript></entry>
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<entry></entry>
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<entry>a<subscript>3</subscript></entry>
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<entry>a<subscript>2</subscript></entry>
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<entry>a<subscript>1</subscript></entry>
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<entry>a<subscript>0</subscript></entry>
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<entry>Y'<subscript>3</subscript></entry>
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<entry>Y'<subscript>2</subscript></entry>
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<entry>Y'<subscript>1</subscript></entry>
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<entry>Y'<subscript>0</subscript></entry>
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</row>
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<row id="V4L2-PIX-FMT-YUV555">
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<entry><constant>V4L2_PIX_FMT_YUV555</constant></entry>
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<entry>'YUVO'</entry>
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<entry></entry>
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<entry>Cb<subscript>2</subscript></entry>
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<entry>Cb<subscript>1</subscript></entry>
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<entry>Cb<subscript>0</subscript></entry>
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<entry>Cr<subscript>4</subscript></entry>
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<entry>Cr<subscript>3</subscript></entry>
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<entry>Cr<subscript>2</subscript></entry>
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<entry>Cr<subscript>1</subscript></entry>
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<entry>Cr<subscript>0</subscript></entry>
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<entry></entry>
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<entry>a</entry>
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<entry>Y'<subscript>4</subscript></entry>
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<entry>Y'<subscript>3</subscript></entry>
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<entry>Y'<subscript>2</subscript></entry>
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<entry>Y'<subscript>1</subscript></entry>
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<entry>Y'<subscript>0</subscript></entry>
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<entry>Cb<subscript>4</subscript></entry>
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<entry>Cb<subscript>3</subscript></entry>
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</row>
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<row id="V4L2-PIX-FMT-YUV565">
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<entry><constant>V4L2_PIX_FMT_YUV565</constant></entry>
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<entry>'YUVP'</entry>
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<entry></entry>
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<entry>Cb<subscript>2</subscript></entry>
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<entry>Cb<subscript>1</subscript></entry>
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<entry>Cb<subscript>0</subscript></entry>
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<entry>Cr<subscript>4</subscript></entry>
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<entry>Cr<subscript>3</subscript></entry>
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<entry>Cr<subscript>2</subscript></entry>
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<entry>Cr<subscript>1</subscript></entry>
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<entry>Cr<subscript>0</subscript></entry>
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<entry></entry>
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<entry>Y'<subscript>4</subscript></entry>
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<entry>Y'<subscript>3</subscript></entry>
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<entry>Y'<subscript>2</subscript></entry>
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<entry>Y'<subscript>1</subscript></entry>
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<entry>Y'<subscript>0</subscript></entry>
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<entry>Cb<subscript>5</subscript></entry>
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<entry>Cb<subscript>4</subscript></entry>
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<entry>Cb<subscript>3</subscript></entry>
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</row>
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<row id="V4L2-PIX-FMT-YUV32">
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<entry><constant>V4L2_PIX_FMT_YUV32</constant></entry>
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<entry>'YUV4'</entry>
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<entry></entry>
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<entry>a<subscript>7</subscript></entry>
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<entry>a<subscript>6</subscript></entry>
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<entry>a<subscript>5</subscript></entry>
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<entry>a<subscript>4</subscript></entry>
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<entry>a<subscript>3</subscript></entry>
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<entry>a<subscript>2</subscript></entry>
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<entry>a<subscript>1</subscript></entry>
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<entry>a<subscript>0</subscript></entry>
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<entry></entry>
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<entry>Y'<subscript>7</subscript></entry>
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<entry>Y'<subscript>6</subscript></entry>
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<entry>Y'<subscript>5</subscript></entry>
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<entry>Y'<subscript>4</subscript></entry>
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<entry>Y'<subscript>3</subscript></entry>
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<entry>Y'<subscript>2</subscript></entry>
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<entry>Y'<subscript>1</subscript></entry>
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<entry>Y'<subscript>0</subscript></entry>
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<entry></entry>
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<entry>Cb<subscript>7</subscript></entry>
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<entry>Cb<subscript>6</subscript></entry>
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<entry>Cb<subscript>5</subscript></entry>
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<entry>Cb<subscript>4</subscript></entry>
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<entry>Cb<subscript>3</subscript></entry>
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<entry>Cb<subscript>2</subscript></entry>
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<entry>Cb<subscript>1</subscript></entry>
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<entry>Cb<subscript>0</subscript></entry>
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<entry></entry>
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<entry>Cr<subscript>7</subscript></entry>
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<entry>Cr<subscript>6</subscript></entry>
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<entry>Cr<subscript>5</subscript></entry>
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<entry>Cr<subscript>4</subscript></entry>
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<entry>Cr<subscript>3</subscript></entry>
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<entry>Cr<subscript>2</subscript></entry>
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<entry>Cr<subscript>1</subscript></entry>
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<entry>Cr<subscript>0</subscript></entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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<para>Bit 7 is the most significant bit. The value of a = alpha
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bits is undefined when reading from the driver, ignored when writing
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to the driver, except when alpha blending has been negotiated for a
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<link linkend="overlay">Video Overlay</link> or <link
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linkend="osd">Video Output Overlay</link>.</para>
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</refsect1>
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</refentry>
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<!--
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Local Variables:
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sgml-parent-document: "pixfmt.sgml"
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indent-tabs-mode: nil
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End:
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-->
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