2 * Cirrus Logic AccuPak (CLJR) codec
3 * Copyright (c) 2003 Alex Beregszaszi
5 * This file is part of FFmpeg.
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.
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.
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
24 * Cirrus Logic AccuPak codec.
28 #include "mpegvideo.h"
30 typedef struct CLJRContext{
31 AVCodecContext *avctx;
38 static int decode_frame(AVCodecContext *avctx,
39 void *data, int *data_size,
40 uint8_t *buf, int buf_size)
42 CLJRContext * const a = avctx->priv_data;
43 AVFrame *picture = data;
44 AVFrame * const p= (AVFrame*)&a->picture;
48 avctx->release_buffer(avctx, p);
51 if(avctx->get_buffer(avctx, p) < 0){
52 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
58 init_get_bits(&a->gb, buf, buf_size);
60 for(y=0; y<avctx->height; y++){
61 uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
62 uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
63 uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
64 for(x=0; x<avctx->width; x+=4){
65 luma[3] = get_bits(&a->gb, 5) << 3;
66 luma[2] = get_bits(&a->gb, 5) << 3;
67 luma[1] = get_bits(&a->gb, 5) << 3;
68 luma[0] = get_bits(&a->gb, 5) << 3;
70 *(cb++) = get_bits(&a->gb, 6) << 2;
71 *(cr++) = get_bits(&a->gb, 6) << 2;
75 *picture= *(AVFrame*)&a->picture;
76 *data_size = sizeof(AVPicture);
84 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
85 CLJRContext * const a = avctx->priv_data;
87 AVFrame * const p= (AVFrame*)&a->picture;
97 align_put_bits(&a->pb);
98 while(get_bit_count(&a->pb)&31)
99 put_bits(&a->pb, 8, 0);
101 size= get_bit_count(&a->pb)/32;
107 static void common_init(AVCodecContext *avctx){
108 CLJRContext * const a = avctx->priv_data;
110 avctx->coded_frame= (AVFrame*)&a->picture;
114 static int decode_init(AVCodecContext *avctx){
118 avctx->pix_fmt= PIX_FMT_YUV411P;
124 static int encode_init(AVCodecContext *avctx){
132 AVCodec cljr_decoder = {
144 #ifdef CONFIG_ENCODERS
146 AVCodec cljr_encoder = {
156 #endif //CONFIG_ENCODERS