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| <title>libogg - datatype - ogg_stream_state</title> |
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| <td><p class=tiny>libogg documentation</p></td> |
| <td align=right><p class=tiny>libogg release 1.2.0 - 20100325</p></td> |
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| <h1>ogg_stream_state</h1> |
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| <p><i>declared in "ogg/ogg.h"</i></p> |
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| <p> |
| The ogg_stream_state struct tracks the current encode/decode state of the current logical bitstream. |
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| <pre><b> |
| typedef struct { |
| unsigned char *body_data; /* bytes from packet bodies */ |
| long body_storage; /* storage elements allocated */ |
| long body_fill; /* elements stored; fill mark */ |
| long body_returned; /* elements of fill returned */ |
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| int *lacing_vals; /* The values that will go to the segment table */ |
| ogg_int64_t *granule_vals; /* granulepos values for headers. Not compact |
| this way, but it is simple coupled to the |
| lacing fifo */ |
| long lacing_storage; |
| long lacing_fill; |
| long lacing_packet; |
| long lacing_returned; |
| |
| unsigned char header[282]; /* working space for header encode */ |
| int header_fill; |
| |
| int e_o_s; /* set when we have buffered the last packet in the |
| logical bitstream */ |
| int b_o_s; /* set after we've written the initial page |
| of a logical bitstream */ |
| long serialno; |
| int pageno; |
| ogg_int64_t packetno; /* sequence number for decode; the framing |
| knows where there's a hole in the data, |
| but we need coupling so that the codec |
| (which is in a seperate abstraction |
| layer) also knows about the gap */ |
| ogg_int64_t granulepos; |
| |
| } ogg_stream_state; |
| </b></pre> |
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| <h3>Relevant Struct Members</h3> |
| <dl> |
| <dt><i>body_data</i></dt> |
| <dd>Pointer to data from packet bodies.</dd> |
| <dt><i>body_storage</i></dt> |
| <dd>Storage allocated for bodies in bytes (filled or unfilled).</dd> |
| <dt><i>body_fill</i></dt> |
| <dd>Amount of storage filled with stored packet bodies.</dd> |
| <dt><i>body_returned</i></dt> |
| <dd>Number of elements returned from storage.</dd> |
| <dt><i>lacing_vals</i></dt> |
| <dd>String of lacing values for the packet segments within the current page. Each value is a byte, indicating packet segment length.</dd> |
| <dt><i>granule_vals</i></dt> |
| <dd>Pointer to the lacing values for the packet segments within the current page.</dd> |
| <dt><i>lacing_storage</i></dt> |
| <dd>Total amount of storage (in bytes) allocated for storing lacing values.</dd> |
| <dt><i>lacing_fill</i></dt> |
| <dd>Fill marker for the current vs. total allocated storage of lacing values for the page.</dd> |
| <dt><i>lacing_packet</i></dt> |
| <dd>Lacing value for current packet segment.</dd> |
| <dt><i>lacing_returned</i></dt> |
| <dd>Number of lacing values returned from lacing_storage.</dd> |
| <dt><i>header</i></dt> |
| <dd>Temporary storage for page header during encode process, while the header is being created.</dd> |
| <dt><i>header_fill</i></dt> |
| <dd>Fill marker for header storage allocation. Used during the header creation process.</dd> |
| <dt><i>e_o_s</i></dt> |
| <dd>Marker set when the last packet of the logical bitstream has been buffered.</dd> |
| <dt><i>b_o_s</i></dt> |
| <dd>Marker set after we have written the first page in the logical bitstream.</dd> |
| <dt><i>serialno</i></dt> |
| <dd>Serial number of this logical bitstream.</dd> |
| <dt><i>pageno</i></dt> |
| <dd>Number of the current page within the stream.</dd> |
| <dt><i>packetno</i></dt> |
| <dd>Number of the current packet.</dd> |
| <dt><i>granulepos</i></dt> |
| <dd>Exact position of decoding/encoding process.</dd> |
| </dl> |
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| <br><br> |
| <hr noshade> |
| <table border=0 width=100%> |
| <tr valign=top> |
| <td><p class=tiny>copyright © 2000-2010 Xiph.Org</p></td> |
| <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td> |
| </tr><tr> |
| <td><p class=tiny>libogg documentation</p></td> |
| <td align=right><p class=tiny>libogg release 1.2.0 - 20100325</p></td> |
| </tr> |
| </table> |
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| </body> |
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