roqvideodec: use av_frame_copy
[libav.git] / libavcodec / roqvideodec.c
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1/*
2 * Copyright (C) 2003 the ffmpeg project
3 *
2912e87a 4 * This file is part of Libav.
55c970e3 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 17 * License along with Libav; if not, write to the Free Software
55c970e3 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
21/**
ba87f080 22 * @file
a74dc5b9
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23 * id RoQ Video Decoder by Dr. Tim Ferguson
24 * For more information about the id RoQ format, visit:
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25 * http://www.csse.monash.edu.au/~timf/
26 */
27
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
55c970e3 31
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32#include "libavutil/imgutils.h"
33
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34#include "avcodec.h"
35#include "bytestream.h"
759001c5 36#include "internal.h"
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37#include "roqvideo.h"
38
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39static void roqvideo_decode_frame(RoqContext *ri)
40{
41 unsigned int chunk_id = 0, chunk_arg = 0;
42 unsigned long chunk_size = 0;
43 int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
cdf15771 44 int vqid, xpos, ypos, xp, yp, x, y, mx, my;
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45 int frame_stats[2][4] = {{0},{0}};
46 roq_qcell *qcell;
cdf15771 47 int64_t chunk_start;
55c970e3 48
3e2f2002 49 while (bytestream2_get_bytes_left(&ri->gb) >= 8) {
84a020ef 50 chunk_id = bytestream2_get_le16(&ri->gb);
cdf15771 51 chunk_size = bytestream2_get_le32(&ri->gb);
84a020ef 52 chunk_arg = bytestream2_get_le16(&ri->gb);
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53
54 if(chunk_id == RoQ_QUAD_VQ)
55 break;
56 if(chunk_id == RoQ_QUAD_CODEBOOK) {
57 if((nv1 = chunk_arg >> 8) == 0)
58 nv1 = 256;
59 if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
60 nv2 = 256;
61 for(i = 0; i < nv1; i++) {
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62 ri->cb2x2[i].y[0] = bytestream2_get_byte(&ri->gb);
63 ri->cb2x2[i].y[1] = bytestream2_get_byte(&ri->gb);
64 ri->cb2x2[i].y[2] = bytestream2_get_byte(&ri->gb);
65 ri->cb2x2[i].y[3] = bytestream2_get_byte(&ri->gb);
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66 ri->cb2x2[i].u = bytestream2_get_byte(&ri->gb);
67 ri->cb2x2[i].v = bytestream2_get_byte(&ri->gb);
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68 }
69 for(i = 0; i < nv2; i++)
70 for(j = 0; j < 4; j++)
cdf15771 71 ri->cb4x4[i].idx[j] = bytestream2_get_byte(&ri->gb);
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72 }
73 }
74
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75 chunk_start = bytestream2_tell(&ri->gb);
76 xpos = ypos = 0;
77 while (bytestream2_tell(&ri->gb) < chunk_start + chunk_size) {
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78 for (yp = ypos; yp < ypos + 16; yp += 8)
79 for (xp = xpos; xp < xpos + 16; xp += 8) {
80 if (vqflg_pos < 0) {
cdf15771 81 vqflg = bytestream2_get_le16(&ri->gb);
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82 vqflg_pos = 7;
83 }
84 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
85 frame_stats[0][vqid]++;
86 vqflg_pos--;
87
88 switch(vqid) {
89 case RoQ_ID_MOT:
55c970e3 90 break;
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91 case RoQ_ID_FCC: {
92 int byte = bytestream2_get_byte(&ri->gb);
93 mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
94 my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
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95 ff_apply_motion_8x8(ri, xp, yp, mx, my);
96 break;
cdf15771 97 }
55c970e3 98 case RoQ_ID_SLD:
cdf15771 99 qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
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100 ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]);
101 ff_apply_vector_4x4(ri, xp + 4, yp, ri->cb2x2 + qcell->idx[1]);
102 ff_apply_vector_4x4(ri, xp, yp + 4, ri->cb2x2 + qcell->idx[2]);
103 ff_apply_vector_4x4(ri, xp + 4, yp + 4, ri->cb2x2 + qcell->idx[3]);
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104 break;
105 case RoQ_ID_CCC:
106 for (k = 0; k < 4; k++) {
107 x = xp; y = yp;
108 if(k & 0x01) x += 4;
109 if(k & 0x02) y += 4;
110
111 if (vqflg_pos < 0) {
cdf15771 112 vqflg = bytestream2_get_le16(&ri->gb);
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113 vqflg_pos = 7;
114 }
115 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
116 frame_stats[1][vqid]++;
117 vqflg_pos--;
118 switch(vqid) {
119 case RoQ_ID_MOT:
55c970e3 120 break;
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121 case RoQ_ID_FCC: {
122 int byte = bytestream2_get_byte(&ri->gb);
123 mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
124 my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
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125 ff_apply_motion_4x4(ri, x, y, mx, my);
126 break;
cdf15771 127 }
55c970e3 128 case RoQ_ID_SLD:
cdf15771 129 qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
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130 ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]);
131 ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + qcell->idx[1]);
132 ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + qcell->idx[2]);
133 ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + qcell->idx[3]);
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134 break;
135 case RoQ_ID_CCC:
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136 ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
137 ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
138 ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
139 ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
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140 break;
141 }
142 }
143 break;
144 default:
145 av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
146 }
147 }
148
149 xpos += 16;
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150 if (xpos >= ri->width) {
151 xpos -= ri->width;
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152 ypos += 16;
153 }
9489d2ef 154 if(ypos >= ri->height)
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155 break;
156 }
157}
158
159
98a6fff9 160static av_cold int roq_decode_init(AVCodecContext *avctx)
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161{
162 RoqContext *s = avctx->priv_data;
163
164 s->avctx = avctx;
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165
166 if (avctx->width % 16 || avctx->height % 16) {
167 av_log(avctx, AV_LOG_ERROR,
168 "Dimensions must be a multiple of 16\n");
169 return AVERROR_PATCHWELCOME;
170 }
171
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172 s->width = avctx->width;
173 s->height = avctx->height;
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174
175 s->last_frame = av_frame_alloc();
176 s->current_frame = av_frame_alloc();
177 if (!s->current_frame || !s->last_frame) {
178 av_frame_free(&s->current_frame);
179 av_frame_free(&s->last_frame);
180 return AVERROR(ENOMEM);
181 }
182
716d413c 183 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
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184
185 return 0;
186}
187
188static int roq_decode_frame(AVCodecContext *avctx,
df9b9567 189 void *data, int *got_frame,
7a00bbad 190 AVPacket *avpkt)
55c970e3 191{
7a00bbad
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192 const uint8_t *buf = avpkt->data;
193 int buf_size = avpkt->size;
55c970e3 194 RoqContext *s = avctx->priv_data;
9cbae3a7 195 int copy = !s->current_frame->data[0] && s->last_frame->data[0];
759001c5 196 int ret;
55c970e3 197
759001c5 198 if ((ret = ff_reget_buffer(avctx, s->current_frame)) < 0) {
55c970e3 199 av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
759001c5 200 return ret;
55c970e3 201 }
55c970e3 202
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203 if (copy) {
204 ret = av_frame_copy(s->current_frame, s->last_frame);
205 if (ret < 0)
206 return ret;
207 }
b0f33828 208
cdf15771 209 bytestream2_init(&s->gb, buf, buf_size);
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210 roqvideo_decode_frame(s);
211
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212 if ((ret = av_frame_ref(data, s->current_frame)) < 0)
213 return ret;
df9b9567 214 *got_frame = 1;
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215
216 /* shuffle frames */
217 FFSWAP(AVFrame *, s->current_frame, s->last_frame);
218
219 return buf_size;
220}
221
98a6fff9 222static av_cold int roq_decode_end(AVCodecContext *avctx)
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223{
224 RoqContext *s = avctx->priv_data;
225
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226 av_frame_free(&s->current_frame);
227 av_frame_free(&s->last_frame);
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228
229 return 0;
230}
231
d36beb3f 232AVCodec ff_roq_decoder = {
ec6402b7 233 .name = "roqvideo",
b2bed932 234 .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
ec6402b7 235 .type = AVMEDIA_TYPE_VIDEO,
36ef5369 236 .id = AV_CODEC_ID_ROQ,
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237 .priv_data_size = sizeof(RoqContext),
238 .init = roq_decode_init,
239 .close = roq_decode_end,
240 .decode = roq_decode_frame,
def97856 241 .capabilities = AV_CODEC_CAP_DR1,
55c970e3 242};