2 * Cirrus Logic AccuPak (CLJR) codec
3 * Copyright (c) 2003 Alex Beregszaszi
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 typedef struct CLJRContext {
35 static av_cold int common_init(AVCodecContext *avctx)
37 CLJRContext * const a = avctx->priv_data;
39 avctx->coded_frame = &a->picture;
44 #if CONFIG_CLJR_DECODER
45 static int decode_frame(AVCodecContext *avctx,
46 void *data, int *data_size,
49 const uint8_t *buf = avpkt->data;
50 int buf_size = avpkt->size;
51 CLJRContext * const a = avctx->priv_data;
53 AVFrame *picture = data;
54 AVFrame * const p = &a->picture;
58 avctx->release_buffer(avctx, p);
60 if (avctx->height <= 0 || avctx->width <= 0) {
61 av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n");
62 return AVERROR_INVALIDDATA;
65 if (buf_size < avctx->height * avctx->width) {
66 av_log(avctx, AV_LOG_ERROR,
67 "Resolution larger than buffer size. Invalid header?\n");
68 return AVERROR_INVALIDDATA;
72 if (avctx->get_buffer(avctx, p) < 0) {
73 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
76 p->pict_type = AV_PICTURE_TYPE_I;
79 init_get_bits(&gb, buf, buf_size * 8);
81 for (y = 0; y < avctx->height; y++) {
82 uint8_t *luma = &a->picture.data[0][y * a->picture.linesize[0]];
83 uint8_t *cb = &a->picture.data[1][y * a->picture.linesize[1]];
84 uint8_t *cr = &a->picture.data[2][y * a->picture.linesize[2]];
85 for (x = 0; x < avctx->width; x += 4) {
86 luma[3] = get_bits(&gb, 5) << 3;
87 luma[2] = get_bits(&gb, 5) << 3;
88 luma[1] = get_bits(&gb, 5) << 3;
89 luma[0] = get_bits(&gb, 5) << 3;
91 *(cb++) = get_bits(&gb, 6) << 2;
92 *(cr++) = get_bits(&gb, 6) << 2;
96 *picture = a->picture;
97 *data_size = sizeof(AVPicture);
102 static av_cold int decode_init(AVCodecContext *avctx)
104 avctx->pix_fmt = PIX_FMT_YUV411P;
105 return common_init(avctx);
108 static av_cold int decode_end(AVCodecContext *avctx)
110 CLJRContext *a = avctx->priv_data;
112 if (a->picture.data[0])
113 avctx->release_buffer(avctx, &a->picture);
117 AVCodec ff_cljr_decoder = {
119 .type = AVMEDIA_TYPE_VIDEO,
121 .priv_data_size = sizeof(CLJRContext),
124 .decode = decode_frame,
125 .capabilities = CODEC_CAP_DR1,
126 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
130 #if CONFIG_CLJR_ENCODER
131 static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
132 int buf_size, void *data)
138 p->pict_type = AV_PICTURE_TYPE_I;
141 init_put_bits(&pb, buf, buf_size / 8);
143 for (y = 0; y < avctx->height; y++) {
144 uint8_t *luma = &p->data[0][y * p->linesize[0]];
145 uint8_t *cb = &p->data[1][y * p->linesize[1]];
146 uint8_t *cr = &p->data[2][y * p->linesize[2]];
147 for (x = 0; x < avctx->width; x += 4) {
148 put_bits(&pb, 5, luma[3] >> 3);
149 put_bits(&pb, 5, luma[2] >> 3);
150 put_bits(&pb, 5, luma[1] >> 3);
151 put_bits(&pb, 5, luma[0] >> 3);
153 put_bits(&pb, 6, *(cb++) >> 2);
154 put_bits(&pb, 6, *(cr++) >> 2);
160 return put_bits_count(&pb) / 8;
163 AVCodec ff_cljr_encoder = {
165 .type = AVMEDIA_TYPE_VIDEO,
167 .priv_data_size = sizeof(CLJRContext),
169 .encode = encode_frame,
170 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
172 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),