Define AVMediaType enum, and use it instead of enum CodecType, which
[libav.git] / libavcodec / cljr.c
1 /*
2 * Cirrus Logic AccuPak (CLJR) codec
3 * Copyright (c) 2003 Alex Beregszaszi
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
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
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file libavcodec/cljr.c
24 * Cirrus Logic AccuPak codec.
25 */
26
27 #include "avcodec.h"
28 #include "dsputil.h"
29 #include "get_bits.h"
30
31 /* Disable the encoder. */
32 #undef CONFIG_CLJR_ENCODER
33 #define CONFIG_CLJR_ENCODER 0
34
35 typedef struct CLJRContext{
36 AVCodecContext *avctx;
37 AVFrame picture;
38 int delta[16];
39 int offset[4];
40 GetBitContext gb;
41 } CLJRContext;
42
43 static int decode_frame(AVCodecContext *avctx,
44 void *data, int *data_size,
45 AVPacket *avpkt)
46 {
47 const uint8_t *buf = avpkt->data;
48 int buf_size = avpkt->size;
49 CLJRContext * const a = avctx->priv_data;
50 AVFrame *picture = data;
51 AVFrame * const p= (AVFrame*)&a->picture;
52 int x, y;
53
54 if(p->data[0])
55 avctx->release_buffer(avctx, p);
56
57 p->reference= 0;
58 if(avctx->get_buffer(avctx, p) < 0){
59 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
60 return -1;
61 }
62 p->pict_type= FF_I_TYPE;
63 p->key_frame= 1;
64
65 init_get_bits(&a->gb, buf, buf_size);
66
67 for(y=0; y<avctx->height; y++){
68 uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
69 uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
70 uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
71 for(x=0; x<avctx->width; x+=4){
72 luma[3] = get_bits(&a->gb, 5) << 3;
73 luma[2] = get_bits(&a->gb, 5) << 3;
74 luma[1] = get_bits(&a->gb, 5) << 3;
75 luma[0] = get_bits(&a->gb, 5) << 3;
76 luma+= 4;
77 *(cb++) = get_bits(&a->gb, 6) << 2;
78 *(cr++) = get_bits(&a->gb, 6) << 2;
79 }
80 }
81
82 *picture= *(AVFrame*)&a->picture;
83 *data_size = sizeof(AVPicture);
84
85 emms_c();
86
87 return buf_size;
88 }
89
90 #if CONFIG_CLJR_ENCODER
91 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
92 CLJRContext * const a = avctx->priv_data;
93 AVFrame *pict = data;
94 AVFrame * const p= (AVFrame*)&a->picture;
95 int size;
96
97 *p = *pict;
98 p->pict_type= FF_I_TYPE;
99 p->key_frame= 1;
100
101 emms_c();
102
103 align_put_bits(&a->pb);
104 while(get_bit_count(&a->pb)&31)
105 put_bits(&a->pb, 8, 0);
106
107 size= get_bit_count(&a->pb)/32;
108
109 return size*4;
110 }
111 #endif
112
113 static av_cold void common_init(AVCodecContext *avctx){
114 CLJRContext * const a = avctx->priv_data;
115
116 avctx->coded_frame= (AVFrame*)&a->picture;
117 a->avctx= avctx;
118 }
119
120 static av_cold int decode_init(AVCodecContext *avctx){
121
122 common_init(avctx);
123
124 avctx->pix_fmt= PIX_FMT_YUV411P;
125
126 return 0;
127 }
128
129 #if CONFIG_CLJR_ENCODER
130 static av_cold int encode_init(AVCodecContext *avctx){
131
132 common_init(avctx);
133
134 return 0;
135 }
136 #endif
137
138 AVCodec cljr_decoder = {
139 "cljr",
140 AVMEDIA_TYPE_VIDEO,
141 CODEC_ID_CLJR,
142 sizeof(CLJRContext),
143 decode_init,
144 NULL,
145 NULL,
146 decode_frame,
147 CODEC_CAP_DR1,
148 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
149 };
150
151 #if CONFIG_CLJR_ENCODER
152 AVCodec cljr_encoder = {
153 "cljr",
154 AVMEDIA_TYPE_VIDEO,
155 CODEC_ID_CLJR,
156 sizeof(CLJRContext),
157 encode_init,
158 encode_frame,
159 //encode_end,
160 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
161 };
162 #endif