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dct.h
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1 /*
2  * (I)DCT Transforms
3  * Copyright (c) 2009 Peter Ross <pross@xvid.org>
4  * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
5  * Copyright (c) 2010 Vitor Sessak
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #if !defined(AVCODEC_DCT_H) && (!defined(FFT_FLOAT) || FFT_FLOAT)
25 #define AVCODEC_DCT_H
26 
27 #include <stdint.h>
28 
29 #include "rdft.h"
30 
31 struct DCTContext {
32  int nbits;
33  int inverse;
34  RDFTContext rdft;
35  const float *costab;
36  FFTSample *csc2;
37  void (*dct_calc)(struct DCTContext *s, FFTSample *data);
38  void (*dct32)(FFTSample *out, const FFTSample *in);
39 };
40 
41 /**
42  * Set up DCT.
43  * @param nbits size of the input array:
44  * (1 << nbits) for DCT-II, DCT-III and DST-I
45  * (1 << nbits) + 1 for DCT-I
46  *
47  * @note the first element of the input of DST-I is ignored
48  */
49 int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType type);
50 void ff_dct_end (DCTContext *s);
51 
52 void ff_dct_init_x86(DCTContext *s);
53 
54 void ff_fdct_ifast(int16_t *data);
55 void ff_fdct_ifast248(int16_t *data);
56 void ff_jpeg_fdct_islow_8(int16_t *data);
57 void ff_jpeg_fdct_islow_10(int16_t *data);
58 void ff_fdct248_islow_8(int16_t *data);
59 void ff_fdct248_islow_10(int16_t *data);
60 
61 void ff_j_rev_dct(int16_t *data);
62 void ff_j_rev_dct4(int16_t *data);
63 void ff_j_rev_dct2(int16_t *data);
64 void ff_j_rev_dct1(int16_t *data);
65 void ff_jref_idct_put(uint8_t *dest, int line_size, int16_t *block);
66 void ff_jref_idct_add(uint8_t *dest, int line_size, int16_t *block);
67 
68 #endif /* AVCODEC_DCT_H */
ff_jpeg_fdct_islow_10
void ff_jpeg_fdct_islow_10(int16_t *data)
ff_fdct248_islow_10
void ff_fdct248_islow_10(int16_t *data)
s
const char * s
Definition: avisynth_c.h:631
DCTContext::dct_calc
void(* dct_calc)(struct DCTContext *s, FFTSample *data)
Definition: dct.h:37
ff_fdct_ifast
void ff_fdct_ifast(int16_t *data)
Definition: jfdctfst.c:208
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
DCTContext::costab
const float * costab
Definition: dct.h:35
ff_j_rev_dct4
void ff_j_rev_dct4(int16_t *data)
DCTContext::rdft
RDFTContext rdft
Definition: dct.h:34
ff_dct_init_x86
void ff_dct_init_x86(DCTContext *s)
Definition: dct_init.c:29
uint8_t
uint8_t
Definition: audio_convert.c:194
DCTContext::nbits
int nbits
Definition: dct.h:32
DCTTransformType
DCTTransformType
Definition: avfft.h:93
ff_jref_idct_add
void ff_jref_idct_add(uint8_t *dest, int line_size, int16_t *block)
Definition: jrevdct.c:1165
FFTSample
float FFTSample
Definition: avfft.h:35
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
DCTContext
Definition: dct.h:31
ff_fdct248_islow_8
void ff_fdct248_islow_8(int16_t *data)
ff_j_rev_dct1
void ff_j_rev_dct1(int16_t *data)
out
FILE * out
Definition: movenc-test.c:54
ff_dct_init
int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType type)
Set up DCT.
Definition: dct.c:177
ff_jpeg_fdct_islow_8
void ff_jpeg_fdct_islow_8(int16_t *data)
ff_j_rev_dct
void ff_j_rev_dct(int16_t *data)
ff_jref_idct_put
void ff_jref_idct_put(uint8_t *dest, int line_size, int16_t *block)
Definition: jrevdct.c:1159
DCTContext::inverse
int inverse
Definition: dct.h:33
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Definition: audio_convert.c:194
DCTContext::dct32
void(* dct32)(FFTSample *out, const FFTSample *in)
Definition: dct.h:38
type
GLint GLenum type
Definition: opengl_enc.c:105
ff_dct_end
void ff_dct_end(DCTContext *s)
Definition: dct.c:220
ff_fdct_ifast248
void ff_fdct_ifast248(int16_t *data)
Definition: jfdctfst.c:274
ff_j_rev_dct2
void ff_j_rev_dct2(int16_t *data)
DCTContext::csc2
FFTSample * csc2
Definition: dct.h:36
block
static int16_t block[64]
Definition: dct-test.c:112
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