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.
31 /* Disable the encoder. */
32 #undef CONFIG_CLJR_ENCODER
33 #define CONFIG_CLJR_ENCODER 0
35 typedef struct CLJRContext{
36 AVCodecContext *avctx;
40 static int decode_frame(AVCodecContext *avctx,
41 void *data, int *data_size,
44 const uint8_t *buf = avpkt->data;
45 int buf_size = avpkt->size;
46 CLJRContext * const a = avctx->priv_data;
48 AVFrame *picture = data;
49 AVFrame * const p= (AVFrame*)&a->picture;
53 avctx->release_buffer(avctx, p);
55 if(buf_size/avctx->height < avctx->width) {
56 av_log(avctx, AV_LOG_ERROR, "Resolution larger than buffer size. Invalid header?\n");
61 if(avctx->get_buffer(avctx, p) < 0){
62 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
65 p->pict_type= AV_PICTURE_TYPE_I;
68 init_get_bits(&gb, buf, buf_size * 8);
70 for(y=0; y<avctx->height; y++){
71 uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
72 uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
73 uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
74 for(x=0; x<avctx->width; x+=4){
75 luma[3] = get_bits(&gb, 5) << 3;
76 luma[2] = get_bits(&gb, 5) << 3;
77 luma[1] = get_bits(&gb, 5) << 3;
78 luma[0] = get_bits(&gb, 5) << 3;
80 *(cb++) = get_bits(&gb, 6) << 2;
81 *(cr++) = get_bits(&gb, 6) << 2;
85 *picture= *(AVFrame*)&a->picture;
86 *data_size = sizeof(AVPicture);
93 #if CONFIG_CLJR_ENCODER
94 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
95 CLJRContext * const a = avctx->priv_data;
97 AVFrame * const p= (AVFrame*)&a->picture;
101 p->pict_type= AV_PICTURE_TYPE_I;
106 avpriv_align_put_bits(&a->pb);
107 while(get_bit_count(&a->pb)&31)
108 put_bits(&a->pb, 8, 0);
110 size= get_bit_count(&a->pb)/32;
116 static av_cold void common_init(AVCodecContext *avctx){
117 CLJRContext * const a = avctx->priv_data;
119 avcodec_get_frame_defaults(&a->picture);
120 avctx->coded_frame= (AVFrame*)&a->picture;
124 static av_cold int decode_init(AVCodecContext *avctx){
128 avctx->pix_fmt= PIX_FMT_YUV411P;
133 #if CONFIG_CLJR_ENCODER
134 static av_cold int encode_init(AVCodecContext *avctx){
142 AVCodec ff_cljr_decoder = {
144 .type = AVMEDIA_TYPE_VIDEO,
146 .priv_data_size = sizeof(CLJRContext),
148 .decode = decode_frame,
149 .capabilities = CODEC_CAP_DR1,
150 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
153 #if CONFIG_CLJR_ENCODER
154 AVCodec ff_cljr_encoder = {
156 .type = AVMEDIA_TYPE_VIDEO,
158 .priv_data_size = sizeof(CLJRContext),
160 .encode = encode_frame,
161 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),