typo: CODEC_ID_cljr --> CODEC_ID_CLJR
[libav.git] / libavcodec / cljr.c
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1/*
2 * Cirrus Logic AccuPak (CLJR) codec
3 * Copyright (c) 2003 Alex Beregszaszi
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
3aff069b 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
3aff069b 20 */
115329f1 21
3aff069b 22/**
bad5537e 23 * @file libavcodec/cljr.c
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24 * Cirrus Logic AccuPak codec.
25 */
115329f1 26
3aff069b 27#include "avcodec.h"
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28#include "dsputil.h"
29#include "bitstream.h"
3aff069b 30
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31/* Disable the encoder. */
32#undef CONFIG_CLJR_ENCODER
b250f9c6 33#define CONFIG_CLJR_ENCODER 0
c7ac9449 34
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35typedef struct CLJRContext{
36 AVCodecContext *avctx;
37 AVFrame picture;
38 int delta[16];
39 int offset[4];
40 GetBitContext gb;
41} CLJRContext;
42
115329f1 43static int decode_frame(AVCodecContext *avctx,
3aff069b 44 void *data, int *data_size,
1a2c94cb 45 const uint8_t *buf, int buf_size)
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46{
47 CLJRContext * const a = avctx->priv_data;
48 AVFrame *picture = data;
49 AVFrame * const p= (AVFrame*)&a->picture;
d9c533a5 50 int x, y;
3aff069b 51
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52 if(p->data[0])
53 avctx->release_buffer(avctx, p);
54
55 p->reference= 0;
56 if(avctx->get_buffer(avctx, p) < 0){
9b879566 57 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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58 return -1;
59 }
fbd4293d 60 p->pict_type= FF_I_TYPE;
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61 p->key_frame= 1;
62
63 init_get_bits(&a->gb, buf, buf_size);
64
65 for(y=0; y<avctx->height; y++){
3aff069b 66 uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
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67 uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
68 uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
3aff069b 69 for(x=0; x<avctx->width; x+=4){
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70 luma[3] = get_bits(&a->gb, 5) << 3;
71 luma[2] = get_bits(&a->gb, 5) << 3;
72 luma[1] = get_bits(&a->gb, 5) << 3;
73 luma[0] = get_bits(&a->gb, 5) << 3;
74 luma+= 4;
75 *(cb++) = get_bits(&a->gb, 6) << 2;
76 *(cr++) = get_bits(&a->gb, 6) << 2;
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77 }
78 }
79
80 *picture= *(AVFrame*)&a->picture;
81 *data_size = sizeof(AVPicture);
82
83 emms_c();
115329f1 84
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85 return buf_size;
86}
87
b250f9c6 88#if CONFIG_CLJR_ENCODER
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89static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
90 CLJRContext * const a = avctx->priv_data;
91 AVFrame *pict = data;
92 AVFrame * const p= (AVFrame*)&a->picture;
93 int size;
94 int mb_x, mb_y;
95
96 *p = *pict;
fbd4293d 97 p->pict_type= FF_I_TYPE;
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98 p->key_frame= 1;
99
100 emms_c();
115329f1 101
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102 align_put_bits(&a->pb);
103 while(get_bit_count(&a->pb)&31)
104 put_bits(&a->pb, 8, 0);
115329f1 105
3aff069b 106 size= get_bit_count(&a->pb)/32;
115329f1 107
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108 return size*4;
109}
110#endif
111
98a6fff9 112static av_cold void common_init(AVCodecContext *avctx){
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113 CLJRContext * const a = avctx->priv_data;
114
115 avctx->coded_frame= (AVFrame*)&a->picture;
116 a->avctx= avctx;
117}
118
98a6fff9 119static av_cold int decode_init(AVCodecContext *avctx){
d9c533a5 120
3aff069b 121 common_init(avctx);
115329f1 122
c39c1dca 123 avctx->pix_fmt= PIX_FMT_YUV411P;
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124
125 return 0;
126}
127
b250f9c6 128#if CONFIG_CLJR_ENCODER
98a6fff9 129static av_cold int encode_init(AVCodecContext *avctx){
d9c533a5 130
3aff069b 131 common_init(avctx);
115329f1 132
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133 return 0;
134}
88730be6 135#endif
3aff069b 136
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137AVCodec cljr_decoder = {
138 "cljr",
139 CODEC_TYPE_VIDEO,
140 CODEC_ID_CLJR,
141 sizeof(CLJRContext),
142 decode_init,
143 NULL,
eea8c08f 144 NULL,
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145 decode_frame,
146 CODEC_CAP_DR1,
fe4bf374 147 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
3aff069b 148};
c7ac9449 149
b250f9c6 150#if CONFIG_CLJR_ENCODER
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151AVCodec cljr_encoder = {
152 "cljr",
153 CODEC_TYPE_VIDEO,
01c53437 154 CODEC_ID_CLJR,
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155 sizeof(CLJRContext),
156 encode_init,
157 encode_frame,
158 //encode_end,
fe4bf374 159 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
3aff069b 160};
f544a5fc 161#endif