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<!-- ##### SECTION Title ##### -->
DCT
<!-- ##### SECTION Short_Description ##### -->
Discrete Cosine Transform Related Function Classes
<!-- ##### SECTION Long_Description ##### -->
<para>
Functions operate on arrays of data. The arrays can be either source
arrays (input only), destination arrays (output only), or in-place
arrays (both input and output).
</para>
<para>
The interpretation of a parameter can usually be determined from its
name. Parameters for arrays are of the form d1_1xn, where the first
character represents the direction (source, destination, or in-place),
the second represents the index for that particular direction, and
the characters after the underscore indicate the size of the array.
In this case, "1xn" represents an array that is 1 by N. Note that
the index and the size can both be omitted, giving a default of 1
for the index and 1xn for the size.
</para>
<para>
Parameters that represent strides are of the form "d1s". The
interpretation is similar to above, except that the s indicates
a stride parameter.
</para>
<para>
The exceptions to the above rule are "dest", "src", "dstr", "sstr", etc.
These are aliases for "d1", "s1", "d1s", and "s1s", respectively. This
form is deprecated and will be removed in the 0.4 series.
</para>
<para>
Two special parameters are "n" and "m", which determine the size of
the arrays in other parameters.
</para>
<para>
Data arrays are laid out such that rows are separated by the number
of bytes given by the corresponding stride. Elements in each row
are contiguous. If there is no stride parameter corresponding to an
array, the rows of the array are contiguous.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### FUNCTION oil_dct36_f32 ##### -->
<para>
</para>
@d_36:
@dstr:
@s_36:
@sstr:
<!-- ##### FUNCTION oil_fdct8_f64 ##### -->
<para>
Calculates the forward discrete cosine transform on the source array.
</para>
@d_8:
@s_8:
@dstr:
@sstr:
<!-- ##### FUNCTION oil_fdct8x8_f64 ##### -->
<para>
Calculates the 2-D forward discrete cosine transform on the source array.
</para>
@d_8x8:
@dstr:
@s_8x8:
@sstr:
<!-- ##### FUNCTION oil_fdct8x8s_s16 ##### -->
<para>
Calculates the 2-D forward discrete cosine transform on the source array,
multiplying some values in the destination array by values interesting
to the algorithm. This function is not recommended.
</para>
@d_8x8:
@ds:
@s_8x8:
@ss:
<!-- ##### FUNCTION oil_idct8_f64 ##### -->
<para>
Calculates the inverse discrete cosine transform on the source array.
</para>
@d_8:
@dstr:
@s_8:
@sstr:
<!-- ##### FUNCTION oil_idct8x8_f64 ##### -->
<para>
Calculates the 2-D inverse discrete cosine transform on the source array.
</para>
@d_8x8:
@dstr:
@s_8x8:
@sstr:
<!-- ##### FUNCTION oil_idct8x8_s16 ##### -->
<para>
Calculates the 2-D inverse discrete cosine transform on the source array,
multiplying some values in the destination array by values interesting
to the algorithm. This function is not recommended.
</para>
@d_8x8:
@dstr:
@s_8x8:
@sstr:
<!-- ##### FUNCTION oil_imdct12_f64 ##### -->
<para>
Calculate the inverse modified discrete cosine transform of the source
array. This function is interesting in mp3 decoding.
</para>
@d_12:
@s_6:
<!-- ##### FUNCTION oil_imdct32_f32 ##### -->
<para>
Calculate the inverse modified discrete cosine transform of the source
array. This function is interesting in mp3 decoding.
</para>
@d_32:
@s_32:
<!-- ##### FUNCTION oil_imdct36_f64 ##### -->
<para>
Calculate the inverse modified discrete cosine transform of the source
array. This function is interesting in mp3 decoding.
</para>
@d_36:
@s_18:
<!-- ##### FUNCTION oil_mdct12_f64 ##### -->
<para>
Calculates the modified discrete cosine transform of the source array.
</para>
@d_6:
@s_12:
<!-- ##### FUNCTION oil_mdct36_f64 ##### -->
<para>
Calculates the modified discrete cosine transform of the source array.
</para>
@d_18:
@s_36:
<!-- ##### FUNCTION oil_idct8theora_s16 ##### -->
<para>
Requires version 0.3.2
</para>
@d_8:
@dstr:
@s_8:
@sstr:
<!-- ##### FUNCTION oil_idct8x8lim10_f64 ##### -->
<para>
Requires version 0.3.2
</para>
@d_8x8:
@dstr:
@s_8x8:
@sstr:
<!-- ##### FUNCTION oil_idct8x8lim10_s16 ##### -->
<para>
Requires version 0.3.2
</para>
@d_8x8:
@dstr:
@s_8x8:
@sstr:
<!-- ##### FUNCTION oil_idct8x8theora_s16 ##### -->
<para>
Requires version 0.3.2
</para>
@d_8x8:
@dstr:
@s_8x8:
@sstr:
|
