3 * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "bitstream.h"
37 AVS_P_FRAME_3X3 = 0x01,
38 AVS_P_FRAME_2X2 = 0x02,
39 AVS_P_FRAME_2X3 = 0x03,
40 } avs_video_sub_type_t;
44 avs_decode_frame(AVCodecContext * avctx,
45 void *data, int *data_size, uint8_t * buf, int buf_size)
47 avs_context_t *const avs = avctx->priv_data;
48 AVFrame *picture = data;
49 AVFrame *const p = (AVFrame *) & avs->picture;
50 uint8_t *table, *vect, *out;
51 int i, j, x, y, stride, vect_w = 3, vect_h = 3;
53 avs_block_type_t type;
54 GetBitContext change_map;
56 if (avctx->reget_buffer(avctx, p)) {
57 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
61 p->pict_type = FF_P_TYPE;
64 out = avs->picture.data[0];
65 stride = avs->picture.linesize[0];
71 if (type == AVS_PALETTE) {
73 uint32_t *pal = (uint32_t *) avs->picture.data[1];
76 last = first + LE_16(buf + 2);
78 for (i=first; i<last; i++, buf+=3)
79 pal[i] = (buf[0] << 18) | (buf[1] << 10) | (buf[2] << 2);
86 if (type != AVS_VIDEO)
91 p->pict_type = FF_I_TYPE;
103 case AVS_P_FRAME_2X3:
112 table = buf + (256 * vect_w * vect_h);
113 if (sub_type != AVS_I_FRAME) {
114 int map_size = ((318 / vect_w + 7) / 8) * (198 / vect_h);
115 init_get_bits(&change_map, table, map_size);
119 for (y=0; y<198; y+=vect_h) {
120 for (x=0; x<318; x+=vect_w) {
121 if (sub_type == AVS_I_FRAME || get_bits1(&change_map)) {
122 vect = &buf[*table++ * (vect_w * vect_h)];
123 for (j=0; j<vect_w; j++) {
124 out[(y + 0) * stride + x + j] = vect[(0 * vect_w) + j];
125 out[(y + 1) * stride + x + j] = vect[(1 * vect_w) + j];
127 out[(y + 2) * stride + x + j] =
128 vect[(2 * vect_w) + j];
132 if (sub_type != AVS_I_FRAME)
133 align_get_bits(&change_map);
136 *picture = *(AVFrame *) & avs->picture;
137 *data_size = sizeof(AVPicture);
142 static int avs_decode_init(AVCodecContext * avctx)
144 avctx->pix_fmt = PIX_FMT_PAL8;
148 AVCodec avs_decoder = {
152 sizeof(avs_context_t),