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--HG-- rename : modules/libfishsound/AUTHORS => media/libfishsound/AUTHORS rename : modules/libfishsound/COPYING => media/libfishsound/COPYING rename : modules/libfishsound/ChangeLog => media/libfishsound/ChangeLog rename : modules/libfishsound/Makefile.in => media/libfishsound/Makefile.in rename : modules/libfishsound/README => media/libfishsound/README rename : modules/libfishsound/README_MOZILLA => media/libfishsound/README_MOZILLA rename : modules/libfishsound/include/Makefile.in => media/libfishsound/include/Makefile.in rename : modules/libfishsound/include/fishsound/Makefile.in => media/libfishsound/include/fishsound/Makefile.in rename : modules/libfishsound/include/fishsound/comments.h => media/libfishsound/include/fishsound/comments.h rename : modules/libfishsound/include/fishsound/config.h => media/libfishsound/include/fishsound/config.h rename : modules/libfishsound/include/fishsound/constants.h => media/libfishsound/include/fishsound/constants.h rename : modules/libfishsound/include/fishsound/decode.h => media/libfishsound/include/fishsound/decode.h rename : modules/libfishsound/include/fishsound/deprecated.h => media/libfishsound/include/fishsound/deprecated.h rename : modules/libfishsound/include/fishsound/encode.h => media/libfishsound/include/fishsound/encode.h rename : modules/libfishsound/include/fishsound/fishsound.h => media/libfishsound/include/fishsound/fishsound.h rename : modules/libfishsound/src/Makefile.in => media/libfishsound/src/Makefile.in rename : modules/libfishsound/src/libfishsound/Makefile.in => media/libfishsound/src/libfishsound/Makefile.in rename : modules/libfishsound/src/libfishsound/config.h => media/libfishsound/src/libfishsound/config.h rename : modules/libfishsound/src/libfishsound/convert.h => media/libfishsound/src/libfishsound/convert.h rename : modules/libfishsound/src/libfishsound/convert_c.h => media/libfishsound/src/libfishsound/convert_c.h rename : modules/libfishsound/src/libfishsound/convert_oil.h => media/libfishsound/src/libfishsound/convert_oil.h rename : modules/libfishsound/src/libfishsound/fishsound.c => media/libfishsound/src/libfishsound/fishsound.c rename : modules/libfishsound/src/libfishsound/fishsound_comments.c => media/libfishsound/src/libfishsound/fishsound_comments.c rename : modules/libfishsound/src/libfishsound/fishsound_decode.c => media/libfishsound/src/libfishsound/fishsound_decode.c rename : modules/libfishsound/src/libfishsound/fishsound_encode.c => media/libfishsound/src/libfishsound/fishsound_encode.c rename : modules/libfishsound/src/libfishsound/fishsound_flac.c => media/libfishsound/src/libfishsound/fishsound_flac.c rename : modules/libfishsound/src/libfishsound/fishsound_speex.c => media/libfishsound/src/libfishsound/fishsound_speex.c rename : modules/libfishsound/src/libfishsound/fishsound_vorbis.c => media/libfishsound/src/libfishsound/fishsound_vorbis.c rename : modules/libfishsound/src/libfishsound/fs_compat.h => media/libfishsound/src/libfishsound/fs_compat.h rename : modules/libfishsound/src/libfishsound/fs_vector.c => media/libfishsound/src/libfishsound/fs_vector.c rename : modules/libfishsound/src/libfishsound/fs_vector.h => media/libfishsound/src/libfishsound/fs_vector.h rename : modules/libfishsound/src/libfishsound/private.h => media/libfishsound/src/libfishsound/private.h rename : modules/libfishsound/update.sh => media/libfishsound/update.sh rename : modules/libogg/AUTHORS => media/libogg/AUTHORS rename : modules/libogg/CHANGES => media/libogg/CHANGES rename : modules/libogg/COPYING => media/libogg/COPYING rename : modules/libogg/Makefile.in => media/libogg/Makefile.in rename : modules/libogg/README => media/libogg/README rename : modules/libogg/README_MOZILLA => media/libogg/README_MOZILLA rename : modules/libogg/include/Makefile.in => media/libogg/include/Makefile.in rename : modules/libogg/include/ogg/Makefile.in => 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media/liboggplay/src/liboggplay/oggplay_callback_info.c rename : modules/liboggplay/src/liboggplay/oggplay_data.c => media/liboggplay/src/liboggplay/oggplay_data.c rename : modules/liboggplay/src/liboggplay/oggplay_data.h => media/liboggplay/src/liboggplay/oggplay_data.h rename : modules/liboggplay/src/liboggplay/oggplay_file_reader.c => media/liboggplay/src/liboggplay/oggplay_file_reader.c rename : modules/liboggplay/src/liboggplay/oggplay_file_reader.h => media/liboggplay/src/liboggplay/oggplay_file_reader.h rename : modules/liboggplay/src/liboggplay/oggplay_private.h => media/liboggplay/src/liboggplay/oggplay_private.h rename : modules/liboggplay/src/liboggplay/oggplay_query.c => media/liboggplay/src/liboggplay/oggplay_query.c rename : modules/liboggplay/src/liboggplay/oggplay_seek.c => media/liboggplay/src/liboggplay/oggplay_seek.c rename : modules/liboggplay/src/liboggplay/oggplay_tcp_reader.c => media/liboggplay/src/liboggplay/oggplay_tcp_reader.c rename : modules/liboggplay/src/liboggplay/oggplay_tcp_reader.h => media/liboggplay/src/liboggplay/oggplay_tcp_reader.h rename : modules/liboggplay/src/liboggplay/oggplay_tools.c => media/liboggplay/src/liboggplay/oggplay_tools.c rename : modules/liboggplay/src/liboggplay/oggplay_yuv2rgb.c => media/liboggplay/src/liboggplay/oggplay_yuv2rgb.c rename : modules/liboggplay/src/liboggplay/std_semaphore.h => media/liboggplay/src/liboggplay/std_semaphore.h rename : modules/liboggplay/update.sh => media/liboggplay/update.sh rename : modules/liboggplay_audio/Makefile.in => media/liboggplay_audio/Makefile.in rename : modules/liboggplay_audio/README_MOZILLA => media/liboggplay_audio/README_MOZILLA rename : modules/liboggplay_audio/sydney_audio.h => media/liboggplay_audio/sydney_audio.h rename : modules/liboggplay_audio/sydney_audio_alsa.c => media/liboggplay_audio/sydney_audio_alsa.c rename : modules/liboggplay_audio/sydney_audio_mac.c => media/liboggplay_audio/sydney_audio_mac.c rename : 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modules/libvorbis/lib/masking.h => media/libvorbis/lib/masking.h rename : modules/libvorbis/lib/mdct.h => media/libvorbis/lib/mdct.h rename : modules/libvorbis/lib/misc.h => media/libvorbis/lib/misc.h rename : modules/libvorbis/lib/os.h => media/libvorbis/lib/os.h rename : modules/libvorbis/lib/psy.h => media/libvorbis/lib/psy.h rename : modules/libvorbis/lib/registry.h => media/libvorbis/lib/registry.h rename : modules/libvorbis/lib/scales.h => media/libvorbis/lib/scales.h rename : modules/libvorbis/lib/smallft.h => media/libvorbis/lib/smallft.h rename : modules/libvorbis/lib/vorbis_analysis.c => media/libvorbis/lib/vorbis_analysis.c rename : modules/libvorbis/lib/vorbis_bitrate.c => media/libvorbis/lib/vorbis_bitrate.c rename : modules/libvorbis/lib/vorbis_block.c => media/libvorbis/lib/vorbis_block.c rename : modules/libvorbis/lib/vorbis_codebook.c => media/libvorbis/lib/vorbis_codebook.c rename : modules/libvorbis/lib/vorbis_envelope.c => media/libvorbis/lib/vorbis_envelope.c rename : modules/libvorbis/lib/vorbis_floor0.c => media/libvorbis/lib/vorbis_floor0.c rename : modules/libvorbis/lib/vorbis_floor1.c => media/libvorbis/lib/vorbis_floor1.c rename : modules/libvorbis/lib/vorbis_info.c => media/libvorbis/lib/vorbis_info.c rename : modules/libvorbis/lib/vorbis_lookup.c => media/libvorbis/lib/vorbis_lookup.c rename : modules/libvorbis/lib/vorbis_lpc.c => media/libvorbis/lib/vorbis_lpc.c rename : modules/libvorbis/lib/vorbis_lsp.c => media/libvorbis/lib/vorbis_lsp.c rename : modules/libvorbis/lib/vorbis_mapping0.c => media/libvorbis/lib/vorbis_mapping0.c rename : modules/libvorbis/lib/vorbis_mdct.c => media/libvorbis/lib/vorbis_mdct.c rename : modules/libvorbis/lib/vorbis_psy.c => media/libvorbis/lib/vorbis_psy.c rename : modules/libvorbis/lib/vorbis_registry.c => media/libvorbis/lib/vorbis_registry.c rename : modules/libvorbis/lib/vorbis_res0.c => media/libvorbis/lib/vorbis_res0.c rename : modules/libvorbis/lib/vorbis_sharedbook.c => 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271 lines
8.4 KiB
C
271 lines
8.4 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2007 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function:
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last mod: $Id: idct.c 13884 2007-09-22 08:38:10Z giles $
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********************************************************************/
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#include <string.h>
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#include <ogg/ogg.h>
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#include "dct.h"
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#include "idct.h"
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/*Performs an inverse 8 point Type-II DCT transform.
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The output is scaled by a factor of 2 relative to the orthonormal version of
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the transform.
|
|
_y: The buffer to store the result in.
|
|
Data will be placed in every 8th entry (e.g., in a column of an 8x8
|
|
block).
|
|
_x: The input coefficients.
|
|
The first 8 entries are used (e.g., from a row of an 8x8 block).*/
|
|
static void idct8(ogg_int16_t *_y,const ogg_int16_t _x[8]){
|
|
ogg_int32_t t[8];
|
|
ogg_int32_t r;
|
|
/*Stage 1:*/
|
|
/*0-1 butterfly.*/
|
|
t[0]=OC_C4S4*(ogg_int16_t)(_x[0]+_x[4])>>16;
|
|
t[1]=OC_C4S4*(ogg_int16_t)(_x[0]-_x[4])>>16;
|
|
/*2-3 rotation by 6pi/16.*/
|
|
t[2]=(OC_C6S2*_x[2]>>16)-(OC_C2S6*_x[6]>>16);
|
|
t[3]=(OC_C2S6*_x[2]>>16)+(OC_C6S2*_x[6]>>16);
|
|
/*4-7 rotation by 7pi/16.*/
|
|
t[4]=(OC_C7S1*_x[1]>>16)-(OC_C1S7*_x[7]>>16);
|
|
/*5-6 rotation by 3pi/16.*/
|
|
t[5]=(OC_C3S5*_x[5]>>16)-(OC_C5S3*_x[3]>>16);
|
|
t[6]=(OC_C5S3*_x[5]>>16)+(OC_C3S5*_x[3]>>16);
|
|
t[7]=(OC_C1S7*_x[1]>>16)+(OC_C7S1*_x[7]>>16);
|
|
/*Stage 2:*/
|
|
/*4-5 butterfly.*/
|
|
r=t[4]+t[5];
|
|
t[5]=OC_C4S4*(ogg_int16_t)(t[4]-t[5])>>16;
|
|
t[4]=r;
|
|
/*7-6 butterfly.*/
|
|
r=t[7]+t[6];
|
|
t[6]=OC_C4S4*(ogg_int16_t)(t[7]-t[6])>>16;
|
|
t[7]=r;
|
|
/*Stage 3:*/
|
|
/*0-3 butterfly.*/
|
|
r=t[0]+t[3];
|
|
t[3]=t[0]-t[3];
|
|
t[0]=r;
|
|
/*1-2 butterfly.*/
|
|
r=t[1]+t[2];
|
|
t[2]=t[1]-t[2];
|
|
t[1]=r;
|
|
/*6-5 butterfly.*/
|
|
r=t[6]+t[5];
|
|
t[5]=t[6]-t[5];
|
|
t[6]=r;
|
|
/*Stage 4:*/
|
|
/*0-7 butterfly.*/
|
|
_y[0<<3]=(ogg_int16_t)(t[0]+t[7]);
|
|
/*1-6 butterfly.*/
|
|
_y[1<<3]=(ogg_int16_t)(t[1]+t[6]);
|
|
/*2-5 butterfly.*/
|
|
_y[2<<3]=(ogg_int16_t)(t[2]+t[5]);
|
|
/*3-4 butterfly.*/
|
|
_y[3<<3]=(ogg_int16_t)(t[3]+t[4]);
|
|
_y[4<<3]=(ogg_int16_t)(t[3]-t[4]);
|
|
_y[5<<3]=(ogg_int16_t)(t[2]-t[5]);
|
|
_y[6<<3]=(ogg_int16_t)(t[1]-t[6]);
|
|
_y[7<<3]=(ogg_int16_t)(t[0]-t[7]);
|
|
}
|
|
|
|
/*Performs an inverse 8 point Type-II DCT transform.
|
|
The output is scaled by a factor of 2 relative to the orthonormal version of
|
|
the transform.
|
|
_y: The buffer to store the result in.
|
|
Data will be placed in every 8th entry (e.g., in a column of an 8x8
|
|
block).
|
|
_x: The input coefficients.
|
|
Only the first 4 entries are used.
|
|
The other 4 are assumed to be 0.*/
|
|
static void idct8_4(ogg_int16_t *_y,const ogg_int16_t _x[8]){
|
|
ogg_int32_t t[8];
|
|
ogg_int32_t r;
|
|
/*Stage 1:*/
|
|
t[0]=OC_C4S4*_x[0]>>16;
|
|
t[2]=OC_C6S2*_x[2]>>16;
|
|
t[3]=OC_C2S6*_x[2]>>16;
|
|
t[4]=OC_C7S1*_x[1]>>16;
|
|
t[5]=-(OC_C5S3*_x[3]>>16);
|
|
t[6]=OC_C3S5*_x[3]>>16;
|
|
t[7]=OC_C1S7*_x[1]>>16;
|
|
/*Stage 2:*/
|
|
r=t[4]+t[5];
|
|
t[5]=OC_C4S4*(ogg_int16_t)(t[4]-t[5])>>16;
|
|
t[4]=r;
|
|
r=t[7]+t[6];
|
|
t[6]=OC_C4S4*(ogg_int16_t)(t[7]-t[6])>>16;
|
|
t[7]=r;
|
|
/*Stage 3:*/
|
|
t[1]=t[0]+t[2];
|
|
t[2]=t[0]-t[2];
|
|
r=t[0]+t[3];
|
|
t[3]=t[0]-t[3];
|
|
t[0]=r;
|
|
r=t[6]+t[5];
|
|
t[5]=t[6]-t[5];
|
|
t[6]=r;
|
|
/*Stage 4:*/
|
|
_y[0<<3]=(ogg_int16_t)(t[0]+t[7]);
|
|
_y[1<<3]=(ogg_int16_t)(t[1]+t[6]);
|
|
_y[2<<3]=(ogg_int16_t)(t[2]+t[5]);
|
|
_y[3<<3]=(ogg_int16_t)(t[3]+t[4]);
|
|
_y[4<<3]=(ogg_int16_t)(t[3]-t[4]);
|
|
_y[5<<3]=(ogg_int16_t)(t[2]-t[5]);
|
|
_y[6<<3]=(ogg_int16_t)(t[1]-t[6]);
|
|
_y[7<<3]=(ogg_int16_t)(t[0]-t[7]);
|
|
}
|
|
|
|
/*Performs an inverse 8 point Type-II DCT transform.
|
|
The output is scaled by a factor of 2 relative to the orthonormal version of
|
|
the transform.
|
|
_y: The buffer to store the result in.
|
|
Data will be placed in every 8th entry (e.g., in a column of an 8x8
|
|
block).
|
|
_x: The input coefficients.
|
|
Only the first 3 entries are used.
|
|
The other 5 are assumed to be 0.*/
|
|
static void idct8_3(ogg_int16_t *_y,const ogg_int16_t _x[8]){
|
|
ogg_int32_t t[8];
|
|
ogg_int32_t r;
|
|
/*Stage 1:*/
|
|
t[0]=OC_C4S4*_x[0]>>16;
|
|
t[2]=OC_C6S2*_x[2]>>16;
|
|
t[3]=OC_C2S6*_x[2]>>16;
|
|
t[4]=OC_C7S1*_x[1]>>16;
|
|
t[7]=OC_C1S7*_x[1]>>16;
|
|
/*Stage 2:*/
|
|
t[5]=OC_C4S4*t[4]>>16;
|
|
t[6]=OC_C4S4*t[7]>>16;
|
|
/*Stage 3:*/
|
|
t[1]=t[0]+t[2];
|
|
t[2]=t[0]-t[2];
|
|
r=t[0]+t[3];
|
|
t[3]=t[0]-t[3];
|
|
t[0]=r;
|
|
r=t[6]+t[5];
|
|
t[5]=t[6]-t[5];
|
|
t[6]=r;
|
|
/*Stage 4:*/
|
|
_y[0<<3]=(ogg_int16_t)(t[0]+t[7]);
|
|
_y[1<<3]=(ogg_int16_t)(t[1]+t[6]);
|
|
_y[2<<3]=(ogg_int16_t)(t[2]+t[5]);
|
|
_y[3<<3]=(ogg_int16_t)(t[3]+t[4]);
|
|
_y[4<<3]=(ogg_int16_t)(t[3]-t[4]);
|
|
_y[5<<3]=(ogg_int16_t)(t[2]-t[5]);
|
|
_y[6<<3]=(ogg_int16_t)(t[1]-t[6]);
|
|
_y[7<<3]=(ogg_int16_t)(t[0]-t[7]);
|
|
}
|
|
|
|
|
|
/*Performs an inverse 8 point Type-II DCT transform.
|
|
The output is scaled by a factor of 2 relative to the orthonormal version of
|
|
the transform.
|
|
_y: The buffer to store the result in.
|
|
Data will be placed in every 8th entry (e.g., in a column of an 8x8
|
|
block).
|
|
_x: The input coefficients.
|
|
Only the first 2 entries are used.
|
|
The other 6 are assumed to be 0.*/
|
|
static void idct8_2(ogg_int16_t *_y,const ogg_int16_t _x[8]){
|
|
ogg_int32_t t[8];
|
|
ogg_int32_t r;
|
|
/*Stage 1:*/
|
|
t[0]=OC_C4S4*_x[0]>>16;
|
|
t[4]=OC_C7S1*_x[1]>>16;
|
|
t[7]=OC_C1S7*_x[1]>>16;
|
|
/*Stage 2:*/
|
|
t[5]=OC_C4S4*t[4]>>16;
|
|
t[6]=OC_C4S4*t[7]>>16;
|
|
/*Stage 3:*/
|
|
r=t[6]+t[5];
|
|
t[5]=t[6]-t[5];
|
|
t[6]=r;
|
|
/*Stage 4:*/
|
|
_y[0<<3]=(ogg_int16_t)(t[0]+t[7]);
|
|
_y[1<<3]=(ogg_int16_t)(t[0]+t[6]);
|
|
_y[2<<3]=(ogg_int16_t)(t[0]+t[5]);
|
|
_y[3<<3]=(ogg_int16_t)(t[0]+t[4]);
|
|
_y[4<<3]=(ogg_int16_t)(t[0]-t[4]);
|
|
_y[5<<3]=(ogg_int16_t)(t[0]-t[5]);
|
|
_y[6<<3]=(ogg_int16_t)(t[0]-t[6]);
|
|
_y[7<<3]=(ogg_int16_t)(t[0]-t[7]);
|
|
}
|
|
|
|
|
|
/*Performs an inverse 8 point Type-II DCT transform.
|
|
The output is scaled by a factor of 2 relative to the orthonormal version of
|
|
the transform.
|
|
_y: The buffer to store the result in.
|
|
Data will be placed in every 8th entry (e.g., in a column of an 8x8
|
|
block).
|
|
_x: The input coefficients.
|
|
Only the first entry is used.
|
|
The other 7 are assumed to be 0.*/
|
|
static void idct8_1(ogg_int16_t *_y,const ogg_int16_t _x[1]){
|
|
_y[0<<3]=_y[1<<3]=_y[2<<3]=_y[3<<3]=
|
|
_y[4<<3]=_y[5<<3]=_y[6<<3]=_y[7<<3]=(ogg_int16_t)(OC_C4S4*_x[0]>>16);
|
|
}
|
|
|
|
/*Performs an inverse 8x8 Type-II DCT transform.
|
|
The input is assumed to be scaled by a factor of 4 relative to orthonormal
|
|
version of the transform.
|
|
_y: The buffer to store the result in.
|
|
This may be the same as _x.
|
|
_x: The input coefficients. */
|
|
void oc_idct8x8_c(ogg_int16_t _y[64],const ogg_int16_t _x[64]){
|
|
const ogg_int16_t *in;
|
|
ogg_int16_t *end;
|
|
ogg_int16_t *out;
|
|
ogg_int16_t w[64];
|
|
/*Transform rows of x into columns of w.*/
|
|
for(in=_x,out=w,end=out+8;out<end;in+=8,out++)idct8(out,in);
|
|
/*Transform rows of w into columns of y.*/
|
|
for(in=w,out=_y,end=out+8;out<end;in+=8,out++)idct8(out,in);
|
|
/*Adjust for scale factor.*/
|
|
for(out=_y,end=out+64;out<end;out++)*out=(ogg_int16_t)(*out+8>>4);
|
|
}
|
|
|
|
/*Performs an inverse 8x8 Type-II DCT transform.
|
|
The input is assumed to be scaled by a factor of 4 relative to orthonormal
|
|
version of the transform.
|
|
All coefficients but the first 10 in zig-zag scan order are assumed to be 0:
|
|
x x x x 0 0 0 0
|
|
x x x 0 0 0 0 0
|
|
x x 0 0 0 0 0 0
|
|
x 0 0 0 0 0 0 0
|
|
0 0 0 0 0 0 0 0
|
|
0 0 0 0 0 0 0 0
|
|
0 0 0 0 0 0 0 0
|
|
0 0 0 0 0 0 0 0
|
|
_y: The buffer to store the result in.
|
|
This may be the same as _x.
|
|
_x: The input coefficients. */
|
|
void oc_idct8x8_10_c(ogg_int16_t _y[64],const ogg_int16_t _x[64]){
|
|
const ogg_int16_t *in;
|
|
ogg_int16_t *end;
|
|
ogg_int16_t *out;
|
|
ogg_int16_t w[64];
|
|
/*Transform rows of x into columns of w.*/
|
|
idct8_4(w,_x);
|
|
idct8_3(w+1,_x+8);
|
|
idct8_2(w+2,_x+16);
|
|
idct8_1(w+3,_x+24);
|
|
/*Transform rows of w into columns of y.*/
|
|
for(in=w,out=_y,end=out+8;out<end;in+=8,out++)idct8_4(out,in);
|
|
/*Adjust for scale factor.*/
|
|
for(out=_y,end=out+64;out<end;out++)*out=(ogg_int16_t)(*out+8>>4);
|
|
}
|