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66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
1 /*
2 * Beam Software VB decoder
3 * Copyright (c) 2007 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
ba87f08 @DonDiego Remove explicit filename from Doxygen @file commands.
DonDiego authored
23 * @file
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
24 * VB Video decoder
25 */
26
27 #include <stdio.h>
28 #include <stdlib.h>
29
30 #include "avcodec.h"
31 #include "bytestream.h"
32
33 enum VBFlags{
34 VB_HAS_GMC = 0x01,
35 VB_HAS_AUDIO = 0x04,
36 VB_HAS_VIDEO = 0x08,
37 VB_HAS_PALETTE = 0x10,
38 VB_HAS_LENGTH = 0x20
39 };
40
41 typedef struct VBDecContext {
42 AVCodecContext *avctx;
43 AVFrame pic;
44
45 uint8_t *frame, *prev_frame;
87ac0c0 Use AVPALETTE_COUNT instead of hard-coding 256.
Reimar Döffinger authored
46 uint32_t pal[AVPALETTE_COUNT];
4fccc7c @laurion vb: Use bytestream2 functions
laurion authored
47 GetByteContext stream;
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
48 } VBDecContext;
49
50 static const uint16_t vb_patterns[64] = {
51 0x0660, 0xFF00, 0xCCCC, 0xF000, 0x8888, 0x000F, 0x1111, 0xFEC8,
52 0x8CEF, 0x137F, 0xF731, 0xC800, 0x008C, 0x0013, 0x3100, 0xCC00,
53 0x00CC, 0x0033, 0x3300, 0x0FF0, 0x6666, 0x00F0, 0x0F00, 0x2222,
54 0x4444, 0xF600, 0x8CC8, 0x006F, 0x1331, 0x318C, 0xC813, 0x33CC,
55 0x6600, 0x0CC0, 0x0066, 0x0330, 0xF900, 0xC88C, 0x009F, 0x3113,
56 0x6000, 0x0880, 0x0006, 0x0110, 0xCC88, 0xFC00, 0x00CF, 0x88CC,
57 0x003F, 0x1133, 0x3311, 0xF300, 0x6FF6, 0x0603, 0x08C6, 0x8C63,
58 0xC631, 0x6310, 0xC060, 0x0136, 0x136C, 0x36C8, 0x6C80, 0x324C
59 };
60
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61 static void vb_decode_palette(VBDecContext *c, int data_size)
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
62 {
63 int start, size, i;
64
4fccc7c @laurion vb: Use bytestream2 functions
laurion authored
65 start = bytestream2_get_byte(&c->stream);
66 size = (bytestream2_get_byte(&c->stream) - 1) & 0xFF;
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
67 if(start + size > 255){
68 av_log(c->avctx, AV_LOG_ERROR, "Palette change runs beyond entry 256\n");
69 return;
70 }
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71 if(size*3+2 > data_size){
72 av_log(c->avctx, AV_LOG_ERROR, "Palette data runs beyond chunk size\n");
73 return;
74 }
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
75 for(i = start; i <= start + size; i++)
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michaelni authored
76 c->pal[i] = 0xFFU << 24 | bytestream2_get_be24(&c->stream);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
77 }
78
79 static inline int check_pixel(uint8_t *buf, uint8_t *start, uint8_t *end)
80 {
81 return buf >= start && buf < end;
82 }
83
84 static inline int check_line(uint8_t *buf, uint8_t *start, uint8_t *end)
85 {
86 return buf >= start && (buf + 4) <= end;
87 }
88
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89 static int vb_decode_framedata(VBDecContext *c, int offset)
66f7679 Beam Software SIFF demuxer and video decoder
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90 {
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91 GetByteContext g;
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
92 uint8_t *prev, *cur;
93 int blk, blocks, t, blk2;
94 int blocktypes = 0;
95 int x, y, a, b;
96 int pattype, pattern;
97 const int width = c->avctx->width;
98 uint8_t *pstart = c->prev_frame;
99 uint8_t *pend = c->prev_frame + width*c->avctx->height;
100
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101 g = c->stream;
102
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
103 prev = c->prev_frame + offset;
104 cur = c->frame;
105
106 blocks = (c->avctx->width >> 2) * (c->avctx->height >> 2);
107 blk2 = 0;
108 for(blk = 0; blk < blocks; blk++){
57835fc Check for chunk boundaries when decoding VB codec data
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109 if(!(blk & 3)) {
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110 blocktypes = bytestream2_get_byte(&g);
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111 }
66f7679 Beam Software SIFF demuxer and video decoder
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112 switch(blocktypes & 0xC0){
113 case 0x00: //skip
114 for(y = 0; y < 4; y++)
115 if(check_line(prev + y*width, pstart, pend))
116 memcpy(cur + y*width, prev + y*width, 4);
117 else
118 memset(cur + y*width, 0, 4);
119 break;
120 case 0x40:
4fccc7c @laurion vb: Use bytestream2 functions
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121 t = bytestream2_get_byte(&g);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
122 if(!t){ //raw block
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123 if (bytestream2_get_bytes_left(&g) < 16) {
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124 av_log(c->avctx, AV_LOG_ERROR, "Insufficient data\n");
125 return -1;
126 }
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
127 for(y = 0; y < 4; y++)
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128 bytestream2_get_buffer(&g, cur + y * width, 4);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
129 }else{ // motion compensation
130 x = ((t & 0xF)^8) - 8;
131 y = ((t >> 4) ^8) - 8;
132 t = x + y*width;
133 for(y = 0; y < 4; y++)
134 if(check_line(prev + t + y*width, pstart, pend))
135 memcpy(cur + y*width, prev + t + y*width, 4);
136 else
137 memset(cur + y*width, 0, 4);
138 }
139 break;
140 case 0x80: // fill
4fccc7c @laurion vb: Use bytestream2 functions
laurion authored
141 t = bytestream2_get_byte(&g);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
142 for(y = 0; y < 4; y++)
143 memset(cur + y*width, t, 4);
144 break;
145 case 0xC0: // pattern fill
4fccc7c @laurion vb: Use bytestream2 functions
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146 t = bytestream2_get_byte(&g);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
147 pattype = t >> 6;
148 pattern = vb_patterns[t & 0x3F];
149 switch(pattype){
150 case 0:
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151 a = bytestream2_get_byte(&g);
152 b = bytestream2_get_byte(&g);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
153 for(y = 0; y < 4; y++)
154 for(x = 0; x < 4; x++, pattern >>= 1)
155 cur[x + y*width] = (pattern & 1) ? b : a;
156 break;
157 case 1:
158 pattern = ~pattern;
159 case 2:
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160 a = bytestream2_get_byte(&g);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
161 for(y = 0; y < 4; y++)
162 for(x = 0; x < 4; x++, pattern >>= 1)
163 if(pattern & 1 && check_pixel(prev + x + y*width, pstart, pend))
164 cur[x + y*width] = prev[x + y*width];
165 else
166 cur[x + y*width] = a;
167 break;
168 case 3:
169 av_log(c->avctx, AV_LOG_ERROR, "Invalid opcode seen @%d\n",blk);
170 return -1;
171 }
172 break;
173 }
174 blocktypes <<= 2;
175 cur += 4;
176 prev += 4;
177 blk2++;
178 if(blk2 == (width >> 2)){
179 blk2 = 0;
180 cur += width * 3;
181 prev += width * 3;
182 }
183 }
184 return 0;
185 }
186
7a00bba Implement avcodec_decode_video2(), _audio3() and _subtitle2() which t…
Thilo Borgmann authored
187 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
66f7679 Beam Software SIFF demuxer and video decoder
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188 {
189 VBDecContext * const c = avctx->priv_data;
190 uint8_t *outptr, *srcptr;
191 int i, j;
192 int flags;
193 uint32_t size;
194 int offset = 0;
195
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196 bytestream2_init(&c->stream, avpkt->data, avpkt->size);
197
10ae4bb Get new buffer during frame decoding in VB video decoder, not only once
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198 if(c->pic.data[0])
199 avctx->release_buffer(avctx, &c->pic);
371e165 Try to set AVFrame.reference to correct values.
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200 c->pic.reference = 3;
10ae4bb Get new buffer during frame decoding in VB video decoder, not only once
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201 if(avctx->get_buffer(avctx, &c->pic) < 0){
202 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
203 return -1;
204 }
205
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206 flags = bytestream2_get_le16(&c->stream);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
207
208 if(flags & VB_HAS_GMC){
4fccc7c @laurion vb: Use bytestream2 functions
laurion authored
209 i = (int16_t)bytestream2_get_le16(&c->stream);
210 j = (int16_t)bytestream2_get_le16(&c->stream);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
211 offset = i + j * avctx->width;
5b98ea1 @michaelni vb: Add some checks on input buffer related values.
michaelni authored
212 }
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
213 if(flags & VB_HAS_VIDEO){
4fccc7c @laurion vb: Use bytestream2 functions
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214 size = bytestream2_get_le32(&c->stream);
4a4c427 @michaelni Merge remote-tracking branch 'qatar/master'
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215 if(size > bytestream2_get_bytes_left(&c->stream)+4 || size<4){
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216 av_log(avctx, AV_LOG_ERROR, "Frame size invalid\n");
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
217 return -1;
218 }
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laurion authored
219 vb_decode_framedata(c, offset);
220 bytestream2_skip(&c->stream, size - 4);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
221 }
222 if(flags & VB_HAS_PALETTE){
4fccc7c @laurion vb: Use bytestream2 functions
laurion authored
223 size = bytestream2_get_le32(&c->stream);
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224 vb_decode_palette(c, size);
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
225 }
226
227 memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
228 c->pic.palette_has_changed = flags & VB_HAS_PALETTE;
229
230 outptr = c->pic.data[0];
231 srcptr = c->frame;
232
233 for(i = 0; i < avctx->height; i++){
234 memcpy(outptr, srcptr, avctx->width);
235 srcptr += avctx->width;
236 outptr += c->pic.linesize[0];
237 }
238
239 FFSWAP(uint8_t*, c->frame, c->prev_frame);
240
241 *data_size = sizeof(AVFrame);
242 *(AVFrame*)data = c->pic;
243
244 /* always report that the buffer was completely consumed */
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laurion authored
245 return avpkt->size;
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
246 }
247
98a6fff @zuxy Apply 'cold' attribute to init/uninit functions in libavcodec
zuxy authored
248 static av_cold int decode_init(AVCodecContext *avctx)
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
249 {
250 VBDecContext * const c = avctx->priv_data;
251
252 c->avctx = avctx;
253 avctx->pix_fmt = PIX_FMT_PAL8;
01042d4 lavc: set defaults in internal codec frames
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254 avcodec_get_frame_defaults(&c->pic);
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255
48c65d0 Zero the frame data on allocation for VB codec, e.g. the FATE sample …
Reimar Döffinger authored
256 c->frame = av_mallocz(avctx->width * avctx->height);
257 c->prev_frame = av_mallocz(avctx->width * avctx->height);
66f7679 Beam Software SIFF demuxer and video decoder
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258
259 return 0;
260 }
261
98a6fff @zuxy Apply 'cold' attribute to init/uninit functions in libavcodec
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262 static av_cold int decode_end(AVCodecContext *avctx)
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
263 {
264 VBDecContext *c = avctx->priv_data;
265
266 av_freep(&c->frame);
267 av_freep(&c->prev_frame);
268 if(c->pic.data[0])
269 avctx->release_buffer(avctx, &c->pic);
270
271 return 0;
272 }
273
e7e2df2 @Flameeyes Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parser…
Flameeyes authored
274 AVCodec ff_vb_decoder = {
ec6402b @elenril lavc: use designated initialisers for all codecs.
elenril authored
275 .name = "vb",
276 .type = AVMEDIA_TYPE_VIDEO,
277 .id = CODEC_ID_VB,
278 .priv_data_size = sizeof(VBDecContext),
279 .init = decode_init,
280 .close = decode_end,
281 .decode = decode_frame,
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Stefano Sabatini authored
282 .long_name = NULL_IF_CONFIG_SMALL("Beam Software VB"),
66f7679 Beam Software SIFF demuxer and video decoder
Kostya Shishkov authored
283 };
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