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rv34dsp.c
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1 /*
2  * RV30/40 decoder common dsp functions
3  * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
4  * Copyright (c) 2011 Janne Grunau
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * RV30/40 decoder common dsp functions
26  */
27 
28 #include "rv34dsp.h"
29 #include "libavutil/common.h"
30 
31 /**
32  * @name RV30/40 inverse transform functions
33  * @{
34  */
35 
36 static av_always_inline void rv34_row_transform(int temp[16], int16_t *block)
37 {
38  int i;
39 
40  for(i = 0; i < 4; i++){
41  const int z0 = 13*(block[i+4*0] + block[i+4*2]);
42  const int z1 = 13*(block[i+4*0] - block[i+4*2]);
43  const int z2 = 7* block[i+4*1] - 17*block[i+4*3];
44  const int z3 = 17* block[i+4*1] + 7*block[i+4*3];
45 
46  temp[4*i+0] = z0 + z3;
47  temp[4*i+1] = z1 + z2;
48  temp[4*i+2] = z1 - z2;
49  temp[4*i+3] = z0 - z3;
50  }
51 }
52 
53 /**
54  * Real Video 3.0/4.0 inverse transform + sample reconstruction
55  * Code is almost the same as in SVQ3, only scaling is different.
56  */
57 static void rv34_idct_add_c(uint8_t *dst, ptrdiff_t stride, int16_t *block){
58  int temp[16];
59  int i;
60 
61  rv34_row_transform(temp, block);
62  memset(block, 0, 16*sizeof(int16_t));
63 
64  for(i = 0; i < 4; i++){
65  const int z0 = 13*(temp[4*0+i] + temp[4*2+i]) + 0x200;
66  const int z1 = 13*(temp[4*0+i] - temp[4*2+i]) + 0x200;
67  const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i];
68  const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i];
69 
70  dst[0] = av_clip_uint8( dst[0] + ( (z0 + z3) >> 10 ) );
71  dst[1] = av_clip_uint8( dst[1] + ( (z1 + z2) >> 10 ) );
72  dst[2] = av_clip_uint8( dst[2] + ( (z1 - z2) >> 10 ) );
73  dst[3] = av_clip_uint8( dst[3] + ( (z0 - z3) >> 10 ) );
74 
75  dst += stride;
76  }
77 }
78 
79 /**
80  * RealVideo 3.0/4.0 inverse transform for DC block
81  *
82  * Code is almost the same as rv34_inv_transform()
83  * but final coefficients are multiplied by 1.5 and have no rounding.
84  */
85 static void rv34_inv_transform_noround_c(int16_t *block){
86  int temp[16];
87  int i;
88 
89  rv34_row_transform(temp, block);
90 
91  for(i = 0; i < 4; i++){
92  const int z0 = 39*(temp[4*0+i] + temp[4*2+i]);
93  const int z1 = 39*(temp[4*0+i] - temp[4*2+i]);
94  const int z2 = 21* temp[4*1+i] - 51*temp[4*3+i];
95  const int z3 = 51* temp[4*1+i] + 21*temp[4*3+i];
96 
97  block[i*4+0] = (z0 + z3) >> 11;
98  block[i*4+1] = (z1 + z2) >> 11;
99  block[i*4+2] = (z1 - z2) >> 11;
100  block[i*4+3] = (z0 - z3) >> 11;
101  }
102 }
103 
104 static void rv34_idct_dc_add_c(uint8_t *dst, ptrdiff_t stride, int dc)
105 {
106  int i, j;
107 
108  dc = (13*13*dc + 0x200) >> 10;
109  for (i = 0; i < 4; i++)
110  {
111  for (j = 0; j < 4; j++)
112  dst[j] = av_clip_uint8( dst[j] + dc );
113 
114  dst += stride;
115  }
116 }
117 
119 {
120  int16_t dc = (13 * 13 * 3 * block[0]) >> 11;
121  int i, j;
122 
123  for (i = 0; i < 4; i++, block += 4)
124  for (j = 0; j < 4; j++)
125  block[j] = dc;
126 }
127 
128 /** @} */ // transform
129 
130 
132 {
135 
138 
139  if (ARCH_ARM)
141  if (ARCH_X86)
143 }
else temp
Definition: vf_mcdeint.c:259
static void rv34_inv_transform_noround_c(int16_t *block)
RealVideo 3.0/4.0 inverse transform for DC block.
Definition: rv34dsp.c:85
uint8_t
#define av_cold
Definition: attributes.h:82
av_cold void ff_rv34dsp_init(RV34DSPContext *c)
Definition: rv34dsp.c:131
rv34_idct_add_func rv34_idct_add
Definition: rv34dsp.h:70
static void rv34_idct_dc_add_c(uint8_t *dst, ptrdiff_t stride, int dc)
Definition: rv34dsp.c:104
RV30/40 decoder motion compensation functions.
rv34_idct_dc_add_func rv34_idct_dc_add
Definition: rv34dsp.h:71
rv34_inv_transform_func rv34_inv_transform_dc
Definition: rv34dsp.h:69
av_cold void ff_rv34dsp_init_arm(RV34DSPContext *c)
static void rv34_inv_transform_dc_noround_c(int16_t *block)
Definition: rv34dsp.c:118
static av_always_inline void rv34_row_transform(int temp[16], int16_t *block)
Definition: rv34dsp.c:36
void ff_rv34dsp_init_x86(RV34DSPContext *c)
Definition: rv34dsp_init.c:33
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal and external API header
static double c[64]
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-> dc
rv34_inv_transform_func rv34_inv_transform
Definition: rv34dsp.h:68
#define av_always_inline
Definition: attributes.h:39
#define stride
static void rv34_idct_add_c(uint8_t *dst, ptrdiff_t stride, int16_t *block)
Real Video 3.0/4.0 inverse transform + sample reconstruction Code is almost the same as in SVQ3...
Definition: rv34dsp.c:57
static int16_t block[64]
Definition: dct-test.c:112