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ulti.c
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1/*
2 * IBM Ultimotion Video Decoder
3 * Copyright (C) 2004 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/**
23 * @file
24 * IBM Ultimotion Video Decoder.
25 */
26
27#include "avcodec.h"
28#include "bytestream.h"
29#include "codec_internal.h"
30#include "decode.h"
31
32#include "ulti_cb.h"
33
41
42static av_cold int ulti_decode_init(AVCodecContext *avctx)
43{
44 UltimotionDecodeContext *s = avctx->priv_data;
45
46 s->avctx = avctx;
47 s->width = avctx->width;
48 s->height = avctx->height;
49 s->blocks = (s->width / 8) * (s->height / 8);
50 if (s->blocks == 0)
51 return AVERROR_INVALIDDATA;
52 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
53 s->ulti_codebook = ulti_codebook;
54
55 s->frame = av_frame_alloc();
56 if (!s->frame)
57 return AVERROR(ENOMEM);
58
59 return 0;
60}
61
62static av_cold int ulti_decode_end(AVCodecContext *avctx)
63{
64 UltimotionDecodeContext *s = avctx->priv_data;
65
66 av_frame_free(&s->frame);
67
68 return 0;
69}
70
71static const int block_coords[8] = // 4x4 block coords in 8x8 superblock
72 { 0, 0, 0, 4, 4, 4, 4, 0};
73
74static const int angle_by_index[4] = { 0, 2, 6, 12};
75
76/* Lookup tables for luma and chroma - used by ulti_convert_yuv() */
77static const uint8_t ulti_lumas[64] =
78 { 0x10, 0x13, 0x17, 0x1A, 0x1E, 0x21, 0x25, 0x28,
79 0x2C, 0x2F, 0x33, 0x36, 0x3A, 0x3D, 0x41, 0x44,
80 0x48, 0x4B, 0x4F, 0x52, 0x56, 0x59, 0x5C, 0x60,
81 0x63, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C,
82 0x7F, 0x83, 0x86, 0x8A, 0x8D, 0x91, 0x94, 0x98,
83 0x9B, 0x9F, 0xA2, 0xA5, 0xA9, 0xAC, 0xB0, 0xB3,
84 0xB7, 0xBA, 0xBE, 0xC1, 0xC5, 0xC8, 0xCC, 0xCF,
85 0xD3, 0xD6, 0xDA, 0xDD, 0xE1, 0xE4, 0xE8, 0xEB};
86
87static const uint8_t ulti_chromas[16] =
88 { 0x60, 0x67, 0x6D, 0x73, 0x7A, 0x80, 0x86, 0x8D,
89 0x93, 0x99, 0xA0, 0xA6, 0xAC, 0xB3, 0xB9, 0xC0};
90
91/* convert Ultimotion YUV block (sixteen 6-bit Y samples and
92 two 4-bit chroma samples) into standard YUV and put it into frame */
93static void ulti_convert_yuv(AVFrame *frame, int x, int y,
94 uint8_t *luma,int chroma)
95{
96 uint8_t *y_plane, *cr_plane, *cb_plane;
97 int i;
98
99 y_plane = frame->data[0] + x + y * frame->linesize[0];
100 cr_plane = frame->data[1] + (x / 4) + (y / 4) * frame->linesize[1];
101 cb_plane = frame->data[2] + (x / 4) + (y / 4) * frame->linesize[2];
102
103 cr_plane[0] = ulti_chromas[chroma >> 4];
104
105 cb_plane[0] = ulti_chromas[chroma & 0xF];
106
107
108 for(i = 0; i < 16; i++){
109 y_plane[i & 3] = ulti_lumas[luma[i]];
110 if((i & 3) == 3) { //next row
111 y_plane += frame->linesize[0];
112 }
113 }
114}
115
116/* generate block like in MS Video1 */
117static void ulti_pattern(AVFrame *frame, int x, int y,
118 int f0, int f1, int Y0, int Y1, int chroma)
119{
120 uint8_t Luma[16];
121 int mask, i;
122 for(mask = 0x80, i = 0; mask; mask >>= 1, i++) {
123 if(f0 & mask)
124 Luma[i] = Y1;
125 else
126 Luma[i] = Y0;
127 }
128
129 for(mask = 0x80, i = 8; mask; mask >>= 1, i++) {
130 if(f1 & mask)
131 Luma[i] = Y1;
132 else
133 Luma[i] = Y0;
134 }
135
136 ulti_convert_yuv(frame, x, y, Luma, chroma);
137}
138
139/* fill block with some gradient */
140static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int angle)
141{
142 uint8_t Luma[16];
143 if(angle & 8) { //reverse order
144 int t;
145 angle &= 0x7;
146 t = Y[0];
147 Y[0] = Y[3];
148 Y[3] = t;
149 t = Y[1];
150 Y[1] = Y[2];
151 Y[2] = t;
152 }
153 switch(angle){
154 case 0:
155 Luma[0] = Y[0]; Luma[1] = Y[1]; Luma[2] = Y[2]; Luma[3] = Y[3];
156 Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3];
157 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3];
158 Luma[12] = Y[0]; Luma[13] = Y[1]; Luma[14] = Y[2]; Luma[15] = Y[3];
159 break;
160 case 1:
161 Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3];
162 Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3];
163 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3];
164 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2];
165 break;
166 case 2:
167 Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3];
168 Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3];
169 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2];
170 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2];
171 break;
172 case 3:
173 Luma[0] = Y[2]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3];
174 Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3];
175 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2];
176 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[1];
177 break;
178 case 4:
179 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3];
180 Luma[4] = Y[2]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[2];
181 Luma[8] = Y[1]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[1];
182 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0];
183 break;
184 case 5:
185 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[2];
186 Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[1];
187 Luma[8] = Y[2]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[0];
188 Luma[12] = Y[1]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0];
189 break;
190 case 6:
191 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[2];
192 Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[1];
193 Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0];
194 Luma[12] = Y[1]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0];
195 break;
196 case 7:
197 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[1];
198 Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[0];
199 Luma[8] = Y[3]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0];
200 Luma[12] = Y[2]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0];
201 break;
202 default:
203 Luma[0] = Y[0]; Luma[1] = Y[0]; Luma[2] = Y[1]; Luma[3] = Y[1];
204 Luma[4] = Y[0]; Luma[5] = Y[0]; Luma[6] = Y[1]; Luma[7] = Y[1];
205 Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[3]; Luma[11] = Y[3];
206 Luma[12] = Y[2]; Luma[13] = Y[2]; Luma[14] = Y[3]; Luma[15] = Y[3];
207 break;
208 }
209
210 ulti_convert_yuv(frame, x, y, Luma, chroma);
211}
212
213static int ulti_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
214 int *got_frame, AVPacket *avpkt)
215{
216 const uint8_t *buf = avpkt->data;
217 int buf_size = avpkt->size;
218 UltimotionDecodeContext *s=avctx->priv_data;
219 int modifier = 0;
220 int uniq = 0;
221 int mode = 0;
222 int blocks = 0;
223 int done = 0;
224 int x = 0, y = 0;
225 int i, ret;
226 int skip;
227 int tmp;
228
229 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
230 return ret;
231
232 bytestream2_init(&s->gb, buf, buf_size);
233
234 while(!done) {
235 int idx;
236 if(blocks >= s->blocks || y >= s->height)
237 break;//all blocks decoded
238
239 if (bytestream2_get_bytes_left(&s->gb) < 1)
240 goto err;
241 idx = bytestream2_get_byteu(&s->gb);
242 if((idx & 0xF8) == 0x70) {
243 switch(idx) {
244 case 0x70: //change modifier
245 modifier = bytestream2_get_byte(&s->gb);
246 if(modifier>1)
247 av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
248 break;
249 case 0x71: // set uniq flag
250 uniq = 1;
251 break;
252 case 0x72: //toggle mode
253 mode = !mode;
254 break;
255 case 0x73: //end-of-frame
256 done = 1;
257 break;
258 case 0x74: //skip some blocks
259 skip = bytestream2_get_byte(&s->gb);
260 if ((blocks + skip) >= s->blocks)
261 break;
262 blocks += skip;
263 x += skip * 8;
264 while(x >= s->width) {
265 x -= s->width;
266 y += 8;
267 }
268 break;
269 default:
270 av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx);
271 }
272 } else { //handle one block
273 int code;
274 int cf;
275 int angle = 0;
276 uint8_t Y[4]; // luma samples of block
277 int tx = 0, ty = 0; //coords of subblock
278 int chroma = 0;
279 if (mode || uniq) {
280 uniq = 0;
281 cf = 1;
282 chroma = 0;
283 } else {
284 cf = 0;
285 if (idx) {
286 chroma = bytestream2_get_byte(&s->gb);
287 }
288 }
289 for (i = 0; i < 4; i++) { // for every subblock
290 code = (idx >> (6 - i*2)) & 3; //extract 2 bits
291 if(!code) //skip subblock
292 continue;
293 if(cf) {
294 chroma = bytestream2_get_byte(&s->gb);
295 }
296 tx = x + block_coords[i * 2];
297 ty = y + block_coords[(i * 2) + 1];
298 switch(code) {
299 case 1:
300 tmp = bytestream2_get_byte(&s->gb);
301
302 angle = angle_by_index[(tmp >> 6) & 0x3];
303
304 Y[0] = tmp & 0x3F;
305 Y[1] = Y[0];
306
307 if (angle) {
308 Y[2] = Y[0]+1;
309 if (Y[2] > 0x3F)
310 Y[2] = 0x3F;
311 Y[3] = Y[2];
312 } else {
313 Y[2] = Y[0];
314 Y[3] = Y[0];
315 }
316 break;
317
318 case 2:
319 if (modifier) { // unpack four luma samples
320 tmp = bytestream2_get_be24(&s->gb);
321
322 Y[0] = (tmp >> 18) & 0x3F;
323 Y[1] = (tmp >> 12) & 0x3F;
324 Y[2] = (tmp >> 6) & 0x3F;
325 Y[3] = tmp & 0x3F;
326 angle = 16;
327 } else { // retrieve luma samples from codebook
328 tmp = bytestream2_get_be16(&s->gb);
329
330 angle = (tmp >> 12) & 0xF;
331 tmp &= 0xFFF;
332 tmp <<= 2;
333 Y[0] = s->ulti_codebook[tmp];
334 Y[1] = s->ulti_codebook[tmp + 1];
335 Y[2] = s->ulti_codebook[tmp + 2];
336 Y[3] = s->ulti_codebook[tmp + 3];
337 }
338 break;
339
340 case 3:
341 if (modifier) { // all 16 luma samples
342 uint8_t Luma[16];
343
344 if (bytestream2_get_bytes_left(&s->gb) < 12)
345 goto err;
346 tmp = bytestream2_get_be24u(&s->gb);
347 Luma[0] = (tmp >> 18) & 0x3F;
348 Luma[1] = (tmp >> 12) & 0x3F;
349 Luma[2] = (tmp >> 6) & 0x3F;
350 Luma[3] = tmp & 0x3F;
351
352 tmp = bytestream2_get_be24u(&s->gb);
353 Luma[4] = (tmp >> 18) & 0x3F;
354 Luma[5] = (tmp >> 12) & 0x3F;
355 Luma[6] = (tmp >> 6) & 0x3F;
356 Luma[7] = tmp & 0x3F;
357
358 tmp = bytestream2_get_be24u(&s->gb);
359 Luma[8] = (tmp >> 18) & 0x3F;
360 Luma[9] = (tmp >> 12) & 0x3F;
361 Luma[10] = (tmp >> 6) & 0x3F;
362 Luma[11] = tmp & 0x3F;
363
364 tmp = bytestream2_get_be24u(&s->gb);
365 Luma[12] = (tmp >> 18) & 0x3F;
366 Luma[13] = (tmp >> 12) & 0x3F;
367 Luma[14] = (tmp >> 6) & 0x3F;
368 Luma[15] = tmp & 0x3F;
369
370 ulti_convert_yuv(s->frame, tx, ty, Luma, chroma);
371 } else {
372 if (bytestream2_get_bytes_left(&s->gb) < 4)
373 goto err;
374 tmp = bytestream2_get_byteu(&s->gb);
375 if(tmp & 0x80) {
376 angle = (tmp >> 4) & 0x7;
377 tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb);
378 Y[0] = (tmp >> 6) & 0x3F;
379 Y[1] = tmp & 0x3F;
380 Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F;
381 Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F;
382 ulti_grad(s->frame, tx, ty, Y, chroma, angle); //draw block
383 } else { // some patterns
384 int f0 = tmp;
385 int f1 = bytestream2_get_byteu(&s->gb);
386 Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F;
387 Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F;
388 ulti_pattern(s->frame, tx, ty, f0, f1, Y[0], Y[1], chroma);
389 }
390 }
391 break;
392 }
393 if(code != 3)
394 ulti_grad(s->frame, tx, ty, Y, chroma, angle); // draw block
395 }
396 blocks++;
397 x += 8;
398 if(x >= s->width) {
399 x = 0;
400 y += 8;
401 }
402 }
403 }
404
405 *got_frame = 1;
406 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
407 return ret;
408
409 return buf_size;
410
411err:
412 av_log(avctx, AV_LOG_ERROR,
413 "Insufficient data\n");
414 return AVERROR_INVALIDDATA;
415}
416
417const FFCodec ff_ulti_decoder = {
418 .p.name = "ultimotion",
419 CODEC_LONG_NAME("IBM UltiMotion"),
420 .p.type = AVMEDIA_TYPE_VIDEO,
421 .p.id = AV_CODEC_ID_ULTI,
422 .priv_data_size = sizeof(UltimotionDecodeContext),
423 .init = ulti_decode_init,
424 .close = ulti_decode_end,
425 FF_CODEC_DECODE_CB(ulti_decode_frame),
426 .p.capabilities = AV_CODEC_CAP_DR1,
427};
ff_ulti_decoder
const FFCodec ff_ulti_decoder
Definition ulti.c:417
close
static av_cold void close(AVCodecParserContext *s)
Definition apv_parser.c:197
avcodec.h
Libavcodec external API header.
skip
static void BS_FUNC skip(BSCTX *bc, unsigned int n)
Skip n bits in the buffer.
Definition bitstream_template.h:383
Y
#define Y
Definition boxblur.h:37
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(const GetByteContext *g)
Definition bytestream.h:158
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition bytestream.h:137
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
s
#define s(width, name)
Definition cbs_vp9.c:198
codec_internal.h
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition codec_internal.h:374
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition codec_internal.h:359
ff_reget_buffer
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
Definition decode.c:1906
frame
static AVFrame * frame
Definition demux_decode.c:54
init
int(* init)(AVBSFContext *ctx)
Definition dts2pts.c:608
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition codec.h:49
AV_CODEC_ID_ULTI
@ AV_CODEC_ID_ULTI
Definition codec_id.h:107
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition error.h:61
AVERROR
#define AVERROR(e)
Definition error.h:45
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition frame.c:278
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition frame.c:64
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition frame.c:52
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition log.h:221
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition log.h:210
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition avutil.h:200
av_cold
#define av_cold
Definition attributes.h:117
mask
static const uint16_t mask[17]
Definition lzw.c:38
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition pixfmt.h:79
code
const uint8_t * code
Definition spdifenc.c:433
AVCodecContext
main external API structure.
Definition avcodec.h:443
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition avcodec.h:643
AVCodecContext::width
int width
picture width / height.
Definition avcodec.h:604
AVCodecContext::priv_data
void * priv_data
Definition avcodec.h:470
AVFrame
This structure describes decoded (raw) audio or video data.
Definition frame.h:472
AVPacket
This structure stores compressed data.
Definition packet.h:580
AVPacket::size
int size
Definition packet.h:604
AVPacket::data
uint8_t * data
Definition packet.h:603
UltimotionDecodeContext::ulti_codebook
const uint8_t * ulti_codebook
Definition ulti.c:38
UltimotionDecodeContext::frame
AVFrame * frame
Definition ulti.c:37
UltimotionDecodeContext::gb
GetByteContext gb
Definition ulti.c:39
UltimotionDecodeContext::avctx
AVCodecContext * avctx
Definition ulti.c:35
mode
Definition swscale.c:71
av_log
#define av_log(a,...)
Definition tableprint_vlc.h:27
tmp
static uint8_t tmp[40]
Definition aes_ctr.c:52
ulti_chromas
static const uint8_t ulti_chromas[16]
Definition ulti.c:87
angle_by_index
static const int angle_by_index[4]
Definition ulti.c:74
block_coords
static const int block_coords[8]
Definition ulti.c:71
ulti_decode_frame
static int ulti_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
Definition ulti.c:213
ulti_decode_init
static av_cold int ulti_decode_init(AVCodecContext *avctx)
Definition ulti.c:42
ulti_pattern
static void ulti_pattern(AVFrame *frame, int x, int y, int f0, int f1, int Y0, int Y1, int chroma)
Definition ulti.c:117
ulti_decode_end
static av_cold int ulti_decode_end(AVCodecContext *avctx)
Definition ulti.c:62
ulti_grad
static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int angle)
Definition ulti.c:140
ulti_convert_yuv
static void ulti_convert_yuv(AVFrame *frame, int x, int y, uint8_t *luma, int chroma)
Definition ulti.c:93
ulti_lumas
static const uint8_t ulti_lumas[64]
Definition ulti.c:77
ulti_cb.h
ulti_codebook
static const unsigned char ulti_codebook[16384]
Definition ulti_cb.h:25
chroma
static av_always_inline void chroma(WaveformContext *s, AVFrame *in, AVFrame *out, int component, int intensity, int offset_y, int offset_x, int column, int mirror, int jobnr, int nb_jobs)
Definition vf_waveform.c:1639
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