Define AVMediaType enum, and use it instead of enum CodecType, which
[libav.git] / libavcodec / roqvideodec.c
1 /*
2 * Copyright (C) 2003 the ffmpeg project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file libavcodec/roqvideodec.c
23 * id RoQ Video Decoder by Dr. Tim Ferguson
24 * For more information about the id RoQ format, visit:
25 * http://www.csse.monash.edu.au/~timf/
26 */
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31
32 #include "avcodec.h"
33 #include "bytestream.h"
34 #include "roqvideo.h"
35
36 static void roqvideo_decode_frame(RoqContext *ri)
37 {
38 unsigned int chunk_id = 0, chunk_arg = 0;
39 unsigned long chunk_size = 0;
40 int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
41 int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my;
42 int frame_stats[2][4] = {{0},{0}};
43 roq_qcell *qcell;
44 const unsigned char *buf = ri->buf;
45 const unsigned char *buf_end = ri->buf + ri->size;
46
47 while (buf < buf_end) {
48 chunk_id = bytestream_get_le16(&buf);
49 chunk_size = bytestream_get_le32(&buf);
50 chunk_arg = bytestream_get_le16(&buf);
51
52 if(chunk_id == RoQ_QUAD_VQ)
53 break;
54 if(chunk_id == RoQ_QUAD_CODEBOOK) {
55 if((nv1 = chunk_arg >> 8) == 0)
56 nv1 = 256;
57 if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
58 nv2 = 256;
59 for(i = 0; i < nv1; i++) {
60 ri->cb2x2[i].y[0] = *buf++;
61 ri->cb2x2[i].y[1] = *buf++;
62 ri->cb2x2[i].y[2] = *buf++;
63 ri->cb2x2[i].y[3] = *buf++;
64 ri->cb2x2[i].u = *buf++;
65 ri->cb2x2[i].v = *buf++;
66 }
67 for(i = 0; i < nv2; i++)
68 for(j = 0; j < 4; j++)
69 ri->cb4x4[i].idx[j] = *buf++;
70 }
71 }
72
73 bpos = xpos = ypos = 0;
74 while(bpos < chunk_size) {
75 for (yp = ypos; yp < ypos + 16; yp += 8)
76 for (xp = xpos; xp < xpos + 16; xp += 8) {
77 if (vqflg_pos < 0) {
78 vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
79 vqflg_pos = 7;
80 }
81 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
82 frame_stats[0][vqid]++;
83 vqflg_pos--;
84
85 switch(vqid) {
86 case RoQ_ID_MOT:
87 break;
88 case RoQ_ID_FCC:
89 mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
90 my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
91 ff_apply_motion_8x8(ri, xp, yp, mx, my);
92 break;
93 case RoQ_ID_SLD:
94 qcell = ri->cb4x4 + buf[bpos++];
95 ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]);
96 ff_apply_vector_4x4(ri, xp+4, yp, ri->cb2x2 + qcell->idx[1]);
97 ff_apply_vector_4x4(ri, xp, yp+4, ri->cb2x2 + qcell->idx[2]);
98 ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cb2x2 + qcell->idx[3]);
99 break;
100 case RoQ_ID_CCC:
101 for (k = 0; k < 4; k++) {
102 x = xp; y = yp;
103 if(k & 0x01) x += 4;
104 if(k & 0x02) y += 4;
105
106 if (vqflg_pos < 0) {
107 vqflg = buf[bpos++];
108 vqflg |= (buf[bpos++] << 8);
109 vqflg_pos = 7;
110 }
111 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
112 frame_stats[1][vqid]++;
113 vqflg_pos--;
114 switch(vqid) {
115 case RoQ_ID_MOT:
116 break;
117 case RoQ_ID_FCC:
118 mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
119 my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
120 ff_apply_motion_4x4(ri, x, y, mx, my);
121 break;
122 case RoQ_ID_SLD:
123 qcell = ri->cb4x4 + buf[bpos++];
124 ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]);
125 ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + qcell->idx[1]);
126 ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + qcell->idx[2]);
127 ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + qcell->idx[3]);
128 break;
129 case RoQ_ID_CCC:
130 ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + buf[bpos]);
131 ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + buf[bpos+1]);
132 ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + buf[bpos+2]);
133 ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + buf[bpos+3]);
134 bpos += 4;
135 break;
136 }
137 }
138 break;
139 default:
140 av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
141 }
142 }
143
144 xpos += 16;
145 if (xpos >= ri->width) {
146 xpos -= ri->width;
147 ypos += 16;
148 }
149 if(ypos >= ri->height)
150 break;
151 }
152 }
153
154
155 static av_cold int roq_decode_init(AVCodecContext *avctx)
156 {
157 RoqContext *s = avctx->priv_data;
158
159 s->avctx = avctx;
160 s->width = avctx->width;
161 s->height = avctx->height;
162 s->last_frame = &s->frames[0];
163 s->current_frame = &s->frames[1];
164 avctx->pix_fmt = PIX_FMT_YUV444P;
165
166 return 0;
167 }
168
169 static int roq_decode_frame(AVCodecContext *avctx,
170 void *data, int *data_size,
171 AVPacket *avpkt)
172 {
173 const uint8_t *buf = avpkt->data;
174 int buf_size = avpkt->size;
175 RoqContext *s = avctx->priv_data;
176 int copy= !s->current_frame->data[0];
177
178 if (avctx->reget_buffer(avctx, s->current_frame)) {
179 av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
180 return -1;
181 }
182
183 if(copy)
184 av_picture_copy((AVPicture*)s->current_frame, (AVPicture*)s->last_frame,
185 avctx->pix_fmt, avctx->width, avctx->height);
186
187 s->buf = buf;
188 s->size = buf_size;
189 roqvideo_decode_frame(s);
190
191 *data_size = sizeof(AVFrame);
192 *(AVFrame*)data = *s->current_frame;
193
194 /* shuffle frames */
195 FFSWAP(AVFrame *, s->current_frame, s->last_frame);
196
197 return buf_size;
198 }
199
200 static av_cold int roq_decode_end(AVCodecContext *avctx)
201 {
202 RoqContext *s = avctx->priv_data;
203
204 /* release the last frame */
205 if (s->last_frame->data[0])
206 avctx->release_buffer(avctx, s->last_frame);
207 if (s->current_frame->data[0])
208 avctx->release_buffer(avctx, s->current_frame);
209
210 return 0;
211 }
212
213 AVCodec roq_decoder = {
214 "roqvideo",
215 AVMEDIA_TYPE_VIDEO,
216 CODEC_ID_ROQ,
217 sizeof(RoqContext),
218 roq_decode_init,
219 NULL,
220 roq_decode_end,
221 roq_decode_frame,
222 CODEC_CAP_DR1,
223 .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
224 };