lavc: use designated initialisers for all codecs.
[libav.git] / libavcodec / truemotion1.c
CommitLineData
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1/*
2 * Duck TrueMotion 1.0 Decoder
3 * Copyright (C) 2003 Alex Beregszaszi & Mike Melanson
4 *
2912e87a 5 * This file is part of Libav.
b78e7197 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
9a4117d5 11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 18 * License along with Libav; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/**
ba87f080 23 * @file
115329f1 24 * Duck TrueMotion v1 Video Decoder by
a7b91ac6 25 * Alex Beregszaszi and
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26 * Mike Melanson (melanson@pcisys.net)
27 *
28 * The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and
be441a9e 29 * outputs RGB555 (or RGB565) data. 24-bit TM1 data is not supported yet.
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30 */
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
9a4117d5 35
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36#include "avcodec.h"
37#include "dsputil.h"
737eb597 38#include "libavutil/imgutils.h"
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39
40#include "truemotion1data.h"
41
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42typedef struct TrueMotion1Context {
43 AVCodecContext *avctx;
44 AVFrame frame;
9a4117d5 45
f5b2e900 46 const uint8_t *buf;
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47 int size;
48
f5b2e900 49 const uint8_t *mb_change_bits;
9a4117d5 50 int mb_change_bits_row_size;
04650579 51 const uint8_t *index_stream;
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52 int index_stream_size;
53
54 int flags;
55 int x, y, w, h;
115329f1 56
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57 uint32_t y_predictor_table[1024];
58 uint32_t c_predictor_table[1024];
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59 uint32_t fat_y_predictor_table[1024];
60 uint32_t fat_c_predictor_table[1024];
115329f1 61
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62 int compression;
63 int block_type;
64 int block_width;
65 int block_height;
66
364ec9dc
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67 int16_t ydt[8];
68 int16_t cdt[8];
69 int16_t fat_ydt[8];
70 int16_t fat_cdt[8];
115329f1 71
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72 int last_deltaset, last_vectable;
73
74 unsigned int *vert_pred;
97113c21 75 int vert_pred_size;
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76
77} TrueMotion1Context;
78
79#define FLAG_SPRITE 32
80#define FLAG_KEYFRAME 16
81#define FLAG_INTERFRAME 8
82#define FLAG_INTERPOLATED 4
83
84struct frame_header {
85 uint8_t header_size;
86 uint8_t compression;
87 uint8_t deltaset;
88 uint8_t vectable;
89 uint16_t ysize;
90 uint16_t xsize;
91 uint16_t checksum;
92 uint8_t version;
93 uint8_t header_type;
94 uint8_t flags;
95 uint8_t control;
96 uint16_t xoffset;
97 uint16_t yoffset;
98 uint16_t width;
99 uint16_t height;
100};
101
102#define ALGO_NOP 0
103#define ALGO_RGB16V 1
104#define ALGO_RGB16H 2
105#define ALGO_RGB24H 3
106
107/* these are the various block sizes that can occupy a 4x4 block */
108#define BLOCK_2x2 0
109#define BLOCK_2x4 1
110#define BLOCK_4x2 2
111#define BLOCK_4x4 3
112
113typedef struct comp_types {
114 int algorithm;
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115 int block_width; // vres
116 int block_height; // hres
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117 int block_type;
118} comp_types;
119
be441a9e 120/* { valid for metatype }, algorithm, num of deltas, vert res, horiz res */
cf2baeb3 121static const comp_types compression_types[17] = {
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122 { ALGO_NOP, 0, 0, 0 },
123
124 { ALGO_RGB16V, 4, 4, BLOCK_4x4 },
125 { ALGO_RGB16H, 4, 4, BLOCK_4x4 },
126 { ALGO_RGB16V, 4, 2, BLOCK_4x2 },
127 { ALGO_RGB16H, 4, 2, BLOCK_4x2 },
128
129 { ALGO_RGB16V, 2, 4, BLOCK_2x4 },
130 { ALGO_RGB16H, 2, 4, BLOCK_2x4 },
131 { ALGO_RGB16V, 2, 2, BLOCK_2x2 },
132 { ALGO_RGB16H, 2, 2, BLOCK_2x2 },
133
134 { ALGO_NOP, 4, 4, BLOCK_4x4 },
135 { ALGO_RGB24H, 4, 4, BLOCK_4x4 },
136 { ALGO_NOP, 4, 2, BLOCK_4x2 },
137 { ALGO_RGB24H, 4, 2, BLOCK_4x2 },
138
139 { ALGO_NOP, 2, 4, BLOCK_2x4 },
140 { ALGO_RGB24H, 2, 4, BLOCK_2x4 },
141 { ALGO_NOP, 2, 2, BLOCK_2x2 },
142 { ALGO_RGB24H, 2, 2, BLOCK_2x2 }
143};
144
145static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
146{
147 int i;
148
149 if (delta_table_index > 3)
150 return;
151
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MM
152 memcpy(s->ydt, ydts[delta_table_index], 8 * sizeof(int16_t));
153 memcpy(s->cdt, cdts[delta_table_index], 8 * sizeof(int16_t));
154 memcpy(s->fat_ydt, fat_ydts[delta_table_index], 8 * sizeof(int16_t));
155 memcpy(s->fat_cdt, fat_cdts[delta_table_index], 8 * sizeof(int16_t));
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156
157 /* Y skinny deltas need to be halved for some reason; maybe the
158 * skinny Y deltas should be modified */
159 for (i = 0; i < 8; i++)
160 {
161 /* drop the lsb before dividing by 2-- net effect: round down
162 * when dividing a negative number (e.g., -3/2 = -2, not -1) */
163 s->ydt[i] &= 0xFFFE;
164 s->ydt[i] /= 2;
165 }
166}
167
63613fe6 168#if HAVE_BIGENDIAN
be441a9e 169static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
6952f123 170#else
be441a9e 171static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
6952f123 172#endif
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173{
174 int lo, hi;
115329f1 175
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176 lo = ydt[p1];
177 lo += (lo << 5) + (lo << 10);
178 hi = ydt[p2];
179 hi += (hi << 5) + (hi << 10);
ccd425e7 180 return (lo + (hi << 16)) << 1;
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181}
182
be441a9e 183static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
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184{
185 int r, b, lo;
115329f1 186
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187 b = cdt[p2];
188 r = cdt[p1] << 10;
189 lo = b + r;
ccd425e7 190 return (lo + (lo << 16)) << 1;
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191}
192
63613fe6 193#if HAVE_BIGENDIAN
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194static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
195#else
196static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
197#endif
198{
199 int lo, hi;
115329f1 200
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201 lo = ydt[p1];
202 lo += (lo << 6) + (lo << 11);
203 hi = ydt[p2];
204 hi += (hi << 6) + (hi << 11);
ccd425e7 205 return (lo + (hi << 16)) << 1;
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206}
207
be441a9e 208static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
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209{
210 int r, b, lo;
115329f1 211
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212 b = cdt[p2];
213 r = cdt[p1] << 11;
214 lo = b + r;
ccd425e7 215 return (lo + (lo << 16)) << 1;
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216}
217
be441a9e 218static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
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219{
220 int lo, hi;
115329f1 221
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222 lo = ydt[p1];
223 hi = ydt[p2];
ccd425e7 224 return (lo + (hi << 8) + (hi << 16)) << 1;
be441a9e
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225}
226
be441a9e 227static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
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228{
229 int r, b;
115329f1 230
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231 b = cdt[p2];
232 r = cdt[p1]<<16;
ccd425e7 233 return (b+r) << 1;
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234}
235
c26ae41d 236static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
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237{
238 int len, i, j;
239 unsigned char delta_pair;
115329f1 240
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241 for (i = 0; i < 1024; i += 4)
242 {
243 len = *sel_vector_table++ / 2;
244 for (j = 0; j < len; j++)
245 {
246 delta_pair = *sel_vector_table++;
115329f1 247 s->y_predictor_table[i+j] = 0xfffffffe &
be441a9e 248 make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
115329f1 249 s->c_predictor_table[i+j] = 0xfffffffe &
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250 make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
251 }
252 s->y_predictor_table[i+(j-1)] |= 1;
253 s->c_predictor_table[i+(j-1)] |= 1;
254 }
255}
256
c26ae41d 257static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
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258{
259 int len, i, j;
260 unsigned char delta_pair;
115329f1 261
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262 for (i = 0; i < 1024; i += 4)
263 {
264 len = *sel_vector_table++ / 2;
265 for (j = 0; j < len; j++)
266 {
267 delta_pair = *sel_vector_table++;
115329f1 268 s->y_predictor_table[i+j] = 0xfffffffe &
be441a9e 269 make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
115329f1 270 s->c_predictor_table[i+j] = 0xfffffffe &
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271 make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
272 }
273 s->y_predictor_table[i+(j-1)] |= 1;
274 s->c_predictor_table[i+(j-1)] |= 1;
275 }
276}
277
c26ae41d 278static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
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279{
280 int len, i, j;
281 unsigned char delta_pair;
115329f1 282
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283 for (i = 0; i < 1024; i += 4)
284 {
285 len = *sel_vector_table++ / 2;
286 for (j = 0; j < len; j++)
287 {
288 delta_pair = *sel_vector_table++;
115329f1 289 s->y_predictor_table[i+j] = 0xfffffffe &
be441a9e 290 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
115329f1 291 s->c_predictor_table[i+j] = 0xfffffffe &
be441a9e 292 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
115329f1 293 s->fat_y_predictor_table[i+j] = 0xfffffffe &
be441a9e 294 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
115329f1 295 s->fat_c_predictor_table[i+j] = 0xfffffffe &
be441a9e 296 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
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297 }
298 s->y_predictor_table[i+(j-1)] |= 1;
299 s->c_predictor_table[i+(j-1)] |= 1;
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300 s->fat_y_predictor_table[i+(j-1)] |= 1;
301 s->fat_c_predictor_table[i+(j-1)] |= 1;
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302 }
303}
304
305/* Returns the number of bytes consumed from the bytestream. Returns -1 if
115329f1 306 * there was an error while decoding the header */
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307static int truemotion1_decode_header(TrueMotion1Context *s)
308{
309 int i;
a940dc69 310 int width_shift = 0;
97113c21 311 int new_pix_fmt;
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312 struct frame_header header;
313 uint8_t header_buffer[128]; /* logical maximum size of the header */
c26ae41d 314 const uint8_t *sel_vector_table;
9a4117d5 315
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316 header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
317 if (s->buf[0] < 0x10)
318 {
bb270c08 319 av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
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320 return -1;
321 }
322
323 /* unscramble the header bytes with a XOR operation */
324 memset(header_buffer, 0, 128);
325 for (i = 1; i < header.header_size; i++)
bb270c08 326 header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
be441a9e 327
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328 header.compression = header_buffer[0];
329 header.deltaset = header_buffer[1];
330 header.vectable = header_buffer[2];
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331 header.ysize = AV_RL16(&header_buffer[3]);
332 header.xsize = AV_RL16(&header_buffer[5]);
333 header.checksum = AV_RL16(&header_buffer[7]);
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334 header.version = header_buffer[9];
335 header.header_type = header_buffer[10];
336 header.flags = header_buffer[11];
337 header.control = header_buffer[12];
338
339 /* Version 2 */
340 if (header.version >= 2)
341 {
342 if (header.header_type > 3)
343 {
be441a9e 344 av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
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345 return -1;
346 } else if ((header.header_type == 2) || (header.header_type == 3)) {
347 s->flags = header.flags;
348 if (!(s->flags & FLAG_INTERFRAME))
349 s->flags |= FLAG_KEYFRAME;
350 } else
351 s->flags = FLAG_KEYFRAME;
352 } else /* Version 1 */
353 s->flags = FLAG_KEYFRAME;
115329f1 354
9a4117d5 355 if (s->flags & FLAG_SPRITE) {
70fb031c 356 av_log_ask_for_sample(s->avctx, "SPRITE frame found.\n");
8274e422
SS
357 /* FIXME header.width, height, xoffset and yoffset aren't initialized */
358#if 0
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359 s->w = header.width;
360 s->h = header.height;
361 s->x = header.xoffset;
362 s->y = header.yoffset;
8274e422
SS
363#else
364 return -1;
365#endif
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366 } else {
367 s->w = header.xsize;
368 s->h = header.ysize;
369 if (header.header_type < 2) {
370 if ((s->w < 213) && (s->h >= 176))
bb270c08 371 {
9a4117d5 372 s->flags |= FLAG_INTERPOLATED;
70fb031c 373 av_log_ask_for_sample(s->avctx, "INTERPOLATION selected.\n");
bb270c08 374 }
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375 }
376 }
377
aee7cf87 378 if (header.compression >= 17) {
fd146758 379 av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
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380 return -1;
381 }
115329f1
DB
382
383 if ((header.deltaset != s->last_deltaset) ||
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384 (header.vectable != s->last_vectable))
385 select_delta_tables(s, header.deltaset);
386
387 if ((header.compression & 1) && header.header_type)
388 sel_vector_table = pc_tbl2;
389 else {
8e37a1de 390 if (header.vectable > 0 && header.vectable < 4)
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391 sel_vector_table = tables[header.vectable - 1];
392 else {
fd146758 393 av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
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394 return -1;
395 }
396 }
115329f1 397
a940dc69 398 if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
97113c21 399 new_pix_fmt = PIX_FMT_RGB32;
a940dc69
RD
400 width_shift = 1;
401 } else
97113c21
RD
402 new_pix_fmt = PIX_FMT_RGB555; // RGB565 is supported as well
403
a940dc69
RD
404 s->w >>= width_shift;
405 if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
406 return -1;
407
97113c21
RD
408 if (s->w != s->avctx->width || s->h != s->avctx->height ||
409 new_pix_fmt != s->avctx->pix_fmt) {
410 if (s->frame.data[0])
411 s->avctx->release_buffer(s->avctx, &s->frame);
e75f418c 412 s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
97113c21
RD
413 s->avctx->pix_fmt = new_pix_fmt;
414 avcodec_set_dimensions(s->avctx, s->w, s->h);
415 av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
416 }
9a4117d5 417
f1c53014
RD
418 /* There is 1 change bit per 4 pixels, so each change byte represents
419 * 32 pixels; divide width by 4 to obtain the number of change bits and
420 * then round up to the nearest byte. */
a940dc69 421 s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
f1c53014 422
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423 if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
424 {
425 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
be441a9e 426 gen_vector_table24(s, sel_vector_table);
9a4117d5 427 else
bb270c08 428 if (s->avctx->pix_fmt == PIX_FMT_RGB555)
be441a9e 429 gen_vector_table15(s, sel_vector_table);
bb270c08 430 else
be441a9e 431 gen_vector_table16(s, sel_vector_table);
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MM
432 }
433
434 /* set up pointers to the other key data chunks */
435 s->mb_change_bits = s->buf + header.header_size;
436 if (s->flags & FLAG_KEYFRAME) {
437 /* no change bits specified for a keyframe; only index bytes */
438 s->index_stream = s->mb_change_bits;
439 } else {
440 /* one change bit per 4x4 block */
115329f1 441 s->index_stream = s->mb_change_bits +
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442 (s->mb_change_bits_row_size * (s->avctx->height >> 2));
443 }
444 s->index_stream_size = s->size - (s->index_stream - s->buf);
445
446 s->last_deltaset = header.deltaset;
447 s->last_vectable = header.vectable;
448 s->compression = header.compression;
449 s->block_width = compression_types[header.compression].block_width;
450 s->block_height = compression_types[header.compression].block_height;
451 s->block_type = compression_types[header.compression].block_type;
452
be441a9e 453 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
bb270c08
DB
454 av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
455 s->last_deltaset, s->last_vectable, s->compression, s->block_width,
456 s->block_height, s->block_type,
457 s->flags & FLAG_KEYFRAME ? " KEY" : "",
458 s->flags & FLAG_INTERFRAME ? " INTER" : "",
459 s->flags & FLAG_SPRITE ? " SPRITE" : "",
460 s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
be441a9e 461
115329f1 462 return header.header_size;
9a4117d5
MM
463}
464
98a6fff9 465static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
9a4117d5 466{
e4141433 467 TrueMotion1Context *s = avctx->priv_data;
9a4117d5
MM
468
469 s->avctx = avctx;
470
be441a9e
AB
471 // FIXME: it may change ?
472// if (avctx->bits_per_sample == 24)
bb270c08 473// avctx->pix_fmt = PIX_FMT_RGB24;
be441a9e 474// else
bb270c08 475// avctx->pix_fmt = PIX_FMT_RGB555;
be441a9e 476
b4d00c20 477 s->frame.data[0] = NULL;
9a4117d5
MM
478
479 /* there is a vertical predictor for each pixel in a line; each vertical
480 * predictor is 0 to start with */
97113c21 481 av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
9a4117d5
MM
482
483 return 0;
484}
485
be441a9e
AB
486/*
487Block decoding order:
488
489dxi: Y-Y
490dxic: Y-C-Y
491dxic2: Y-C-Y-C
492
493hres,vres,i,i%vres (0 < i < 4)
4942x2 0: 0 dxic2
4952x2 1: 1 dxi
4962x2 2: 0 dxic2
4972x2 3: 1 dxi
4982x4 0: 0 dxic2
4992x4 1: 1 dxi
5002x4 2: 2 dxi
5012x4 3: 3 dxi
5024x2 0: 0 dxic
5034x2 1: 1 dxi
5044x2 2: 0 dxic
5054x2 3: 1 dxi
5064x4 0: 0 dxic
5074x4 1: 1 dxi
5084x4 2: 2 dxi
5094x4 3: 3 dxi
510*/
511
9a4117d5
MM
512#define GET_NEXT_INDEX() \
513{\
514 if (index_stream_index >= s->index_stream_size) { \
fd146758 515 av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
9a4117d5
MM
516 return; \
517 } \
518 index = s->index_stream[index_stream_index++] * 4; \
519}
520
521#define APPLY_C_PREDICTOR() \
522 predictor_pair = s->c_predictor_table[index]; \
523 horiz_pred += (predictor_pair >> 1); \
524 if (predictor_pair & 1) { \
525 GET_NEXT_INDEX() \
526 if (!index) { \
527 GET_NEXT_INDEX() \
528 predictor_pair = s->c_predictor_table[index]; \
529 horiz_pred += ((predictor_pair >> 1) * 5); \
530 if (predictor_pair & 1) \
531 GET_NEXT_INDEX() \
532 else \
533 index++; \
534 } \
535 } else \
536 index++;
537
be441a9e
AB
538#define APPLY_C_PREDICTOR_24() \
539 predictor_pair = s->c_predictor_table[index]; \
4b7e4bed 540 horiz_pred += (predictor_pair >> 1); \
be441a9e
AB
541 if (predictor_pair & 1) { \
542 GET_NEXT_INDEX() \
543 if (!index) { \
544 GET_NEXT_INDEX() \
545 predictor_pair = s->fat_c_predictor_table[index]; \
4b7e4bed 546 horiz_pred += (predictor_pair >> 1); \
be441a9e
AB
547 if (predictor_pair & 1) \
548 GET_NEXT_INDEX() \
549 else \
550 index++; \
551 } \
552 } else \
115329f1 553 index++;
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AB
554
555
9a4117d5
MM
556#define APPLY_Y_PREDICTOR() \
557 predictor_pair = s->y_predictor_table[index]; \
558 horiz_pred += (predictor_pair >> 1); \
559 if (predictor_pair & 1) { \
560 GET_NEXT_INDEX() \
561 if (!index) { \
562 GET_NEXT_INDEX() \
563 predictor_pair = s->y_predictor_table[index]; \
564 horiz_pred += ((predictor_pair >> 1) * 5); \
565 if (predictor_pair & 1) \
566 GET_NEXT_INDEX() \
567 else \
568 index++; \
569 } \
570 } else \
571 index++;
572
be441a9e
AB
573#define APPLY_Y_PREDICTOR_24() \
574 predictor_pair = s->y_predictor_table[index]; \
575 horiz_pred += (predictor_pair >> 1); \
576 if (predictor_pair & 1) { \
577 GET_NEXT_INDEX() \
578 if (!index) { \
579 GET_NEXT_INDEX() \
580 predictor_pair = s->fat_y_predictor_table[index]; \
581 horiz_pred += (predictor_pair >> 1); \
582 if (predictor_pair & 1) \
583 GET_NEXT_INDEX() \
584 else \
585 index++; \
586 } \
587 } else \
588 index++;
589
9a4117d5
MM
590#define OUTPUT_PIXEL_PAIR() \
591 *current_pixel_pair = *vert_pred + horiz_pred; \
b4d00c20 592 *vert_pred++ = *current_pixel_pair++;
9a4117d5
MM
593
594static void truemotion1_decode_16bit(TrueMotion1Context *s)
595{
596 int y;
597 int pixels_left; /* remaining pixels on this line */
598 unsigned int predictor_pair;
599 unsigned int horiz_pred;
600 unsigned int *vert_pred;
601 unsigned int *current_pixel_pair;
9a4117d5 602 unsigned char *current_line = s->frame.data[0];
9a4117d5
MM
603 int keyframe = s->flags & FLAG_KEYFRAME;
604
605 /* these variables are for managing the stream of macroblock change bits */
04650579 606 const unsigned char *mb_change_bits = s->mb_change_bits;
9a4117d5
MM
607 unsigned char mb_change_byte;
608 unsigned char mb_change_byte_mask;
609 int mb_change_index;
610
611 /* these variables are for managing the main index stream */
612 int index_stream_index = 0; /* yes, the index into the index stream */
613 int index;
614
615 /* clean out the line buffer */
4b7e4bed 616 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
9a4117d5
MM
617
618 GET_NEXT_INDEX();
619
620 for (y = 0; y < s->avctx->height; y++) {
621
622 /* re-init variables for the next line iteration */
623 horiz_pred = 0;
624 current_pixel_pair = (unsigned int *)current_line;
9a4117d5
MM
625 vert_pred = s->vert_pred;
626 mb_change_index = 0;
627 mb_change_byte = mb_change_bits[mb_change_index++];
628 mb_change_byte_mask = 0x01;
629 pixels_left = s->avctx->width;
630
631 while (pixels_left > 0) {
632
633 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
634
635 switch (y & 3) {
636 case 0:
115329f1 637 /* if macroblock width is 2, apply C-Y-C-Y; else
9a4117d5 638 * apply C-Y-Y */
6952f123 639 if (s->block_width == 2) {
9a4117d5
MM
640 APPLY_C_PREDICTOR();
641 APPLY_Y_PREDICTOR();
642 OUTPUT_PIXEL_PAIR();
643 APPLY_C_PREDICTOR();
644 APPLY_Y_PREDICTOR();
645 OUTPUT_PIXEL_PAIR();
646 } else {
647 APPLY_C_PREDICTOR();
648 APPLY_Y_PREDICTOR();
649 OUTPUT_PIXEL_PAIR();
650 APPLY_Y_PREDICTOR();
651 OUTPUT_PIXEL_PAIR();
652 }
653 break;
654
655 case 1:
656 case 3:
657 /* always apply 2 Y predictors on these iterations */
658 APPLY_Y_PREDICTOR();
659 OUTPUT_PIXEL_PAIR();
660 APPLY_Y_PREDICTOR();
661 OUTPUT_PIXEL_PAIR();
662 break;
663
664 case 2:
115329f1 665 /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
9a4117d5
MM
666 * depending on the macroblock type */
667 if (s->block_type == BLOCK_2x2) {
668 APPLY_C_PREDICTOR();
669 APPLY_Y_PREDICTOR();
670 OUTPUT_PIXEL_PAIR();
671 APPLY_C_PREDICTOR();
672 APPLY_Y_PREDICTOR();
673 OUTPUT_PIXEL_PAIR();
674 } else if (s->block_type == BLOCK_4x2) {
675 APPLY_C_PREDICTOR();
676 APPLY_Y_PREDICTOR();
677 OUTPUT_PIXEL_PAIR();
678 APPLY_Y_PREDICTOR();
679 OUTPUT_PIXEL_PAIR();
680 } else {
681 APPLY_Y_PREDICTOR();
682 OUTPUT_PIXEL_PAIR();
683 APPLY_Y_PREDICTOR();
684 OUTPUT_PIXEL_PAIR();
685 }
686 break;
687 }
688
689 } else {
690
115329f1 691 /* skip (copy) four pixels, but reassign the horizontal
9a4117d5 692 * predictor */
9a4117d5 693 *vert_pred++ = *current_pixel_pair++;
9a4117d5
MM
694 horiz_pred = *current_pixel_pair - *vert_pred;
695 *vert_pred++ = *current_pixel_pair++;
115329f1 696
9a4117d5
MM
697 }
698
699 if (!keyframe) {
700 mb_change_byte_mask <<= 1;
701
702 /* next byte */
703 if (!mb_change_byte_mask) {
704 mb_change_byte = mb_change_bits[mb_change_index++];
705 mb_change_byte_mask = 0x01;
706 }
707 }
708
709 pixels_left -= 4;
710 }
711
712 /* next change row */
713 if (((y + 1) & 3) == 0)
714 mb_change_bits += s->mb_change_bits_row_size;
715
716 current_line += s->frame.linesize[0];
9a4117d5
MM
717 }
718}
719
be441a9e
AB
720static void truemotion1_decode_24bit(TrueMotion1Context *s)
721{
722 int y;
723 int pixels_left; /* remaining pixels on this line */
724 unsigned int predictor_pair;
725 unsigned int horiz_pred;
be441a9e
AB
726 unsigned int *vert_pred;
727 unsigned int *current_pixel_pair;
be441a9e 728 unsigned char *current_line = s->frame.data[0];
be441a9e
AB
729 int keyframe = s->flags & FLAG_KEYFRAME;
730
731 /* these variables are for managing the stream of macroblock change bits */
04650579 732 const unsigned char *mb_change_bits = s->mb_change_bits;
be441a9e
AB
733 unsigned char mb_change_byte;
734 unsigned char mb_change_byte_mask;
735 int mb_change_index;
736
737 /* these variables are for managing the main index stream */
738 int index_stream_index = 0; /* yes, the index into the index stream */
739 int index;
740
741 /* clean out the line buffer */
a0ed075b 742 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
be441a9e
AB
743
744 GET_NEXT_INDEX();
745
746 for (y = 0; y < s->avctx->height; y++) {
747
748 /* re-init variables for the next line iteration */
4b7e4bed 749 horiz_pred = 0;
be441a9e 750 current_pixel_pair = (unsigned int *)current_line;
be441a9e
AB
751 vert_pred = s->vert_pred;
752 mb_change_index = 0;
753 mb_change_byte = mb_change_bits[mb_change_index++];
754 mb_change_byte_mask = 0x01;
755 pixels_left = s->avctx->width;
756
757 while (pixels_left > 0) {
758
759 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
760
761 switch (y & 3) {
762 case 0:
115329f1 763 /* if macroblock width is 2, apply C-Y-C-Y; else
be441a9e
AB
764 * apply C-Y-Y */
765 if (s->block_width == 2) {
766 APPLY_C_PREDICTOR_24();
767 APPLY_Y_PREDICTOR_24();
768 OUTPUT_PIXEL_PAIR();
be441a9e
AB
769 APPLY_C_PREDICTOR_24();
770 APPLY_Y_PREDICTOR_24();
771 OUTPUT_PIXEL_PAIR();
be441a9e
AB
772 } else {
773 APPLY_C_PREDICTOR_24();
774 APPLY_Y_PREDICTOR_24();
775 OUTPUT_PIXEL_PAIR();
be441a9e
AB
776 APPLY_Y_PREDICTOR_24();
777 OUTPUT_PIXEL_PAIR();
be441a9e
AB
778 }
779 break;
780
781 case 1:
782 case 3:
783 /* always apply 2 Y predictors on these iterations */
784 APPLY_Y_PREDICTOR_24();
785 OUTPUT_PIXEL_PAIR();
786 APPLY_Y_PREDICTOR_24();
787 OUTPUT_PIXEL_PAIR();
788 break;
789
790 case 2:
115329f1 791 /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
be441a9e
AB
792 * depending on the macroblock type */
793 if (s->block_type == BLOCK_2x2) {
794 APPLY_C_PREDICTOR_24();
795 APPLY_Y_PREDICTOR_24();
796 OUTPUT_PIXEL_PAIR();
be441a9e
AB
797 APPLY_C_PREDICTOR_24();
798 APPLY_Y_PREDICTOR_24();
799 OUTPUT_PIXEL_PAIR();
be441a9e
AB
800 } else if (s->block_type == BLOCK_4x2) {
801 APPLY_C_PREDICTOR_24();
802 APPLY_Y_PREDICTOR_24();
803 OUTPUT_PIXEL_PAIR();
be441a9e
AB
804 APPLY_Y_PREDICTOR_24();
805 OUTPUT_PIXEL_PAIR();
be441a9e
AB
806 } else {
807 APPLY_Y_PREDICTOR_24();
808 OUTPUT_PIXEL_PAIR();
809 APPLY_Y_PREDICTOR_24();
810 OUTPUT_PIXEL_PAIR();
811 }
812 break;
813 }
814
815 } else {
816
115329f1 817 /* skip (copy) four pixels, but reassign the horizontal
be441a9e 818 * predictor */
be441a9e 819 *vert_pred++ = *current_pixel_pair++;
be441a9e 820 horiz_pred = *current_pixel_pair - *vert_pred;
be441a9e 821 *vert_pred++ = *current_pixel_pair++;
115329f1 822
be441a9e
AB
823 }
824
825 if (!keyframe) {
826 mb_change_byte_mask <<= 1;
827
828 /* next byte */
829 if (!mb_change_byte_mask) {
830 mb_change_byte = mb_change_bits[mb_change_index++];
831 mb_change_byte_mask = 0x01;
832 }
833 }
834
a940dc69 835 pixels_left -= 2;
be441a9e
AB
836 }
837
838 /* next change row */
839 if (((y + 1) & 3) == 0)
840 mb_change_bits += s->mb_change_bits_row_size;
841
842 current_line += s->frame.linesize[0];
be441a9e
AB
843 }
844}
845
846
9a4117d5
MM
847static int truemotion1_decode_frame(AVCodecContext *avctx,
848 void *data, int *data_size,
7a00bbad 849 AVPacket *avpkt)
9a4117d5 850{
7a00bbad
TB
851 const uint8_t *buf = avpkt->data;
852 int buf_size = avpkt->size;
e4141433 853 TrueMotion1Context *s = avctx->priv_data;
9a4117d5
MM
854
855 s->buf = buf;
856 s->size = buf_size;
857
9a4117d5
MM
858 if (truemotion1_decode_header(s) == -1)
859 return -1;
860
be441a9e 861 s->frame.reference = 1;
b4d00c20
AB
862 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
863 FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
864 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
be441a9e
AB
865 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
866 return -1;
867 }
868
b4d00c20 869 if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
be441a9e 870 truemotion1_decode_24bit(s);
b4d00c20 871 } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
9a4117d5
MM
872 truemotion1_decode_16bit(s);
873 }
874
9a4117d5
MM
875 *data_size = sizeof(AVFrame);
876 *(AVFrame*)data = s->frame;
877
878 /* report that the buffer was completely consumed */
879 return buf_size;
880}
881
98a6fff9 882static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
9a4117d5 883{
e4141433 884 TrueMotion1Context *s = avctx->priv_data;
9a4117d5 885
b4d00c20
AB
886 if (s->frame.data[0])
887 avctx->release_buffer(avctx, &s->frame);
9a4117d5
MM
888
889 av_free(s->vert_pred);
890
891 return 0;
892}
893
d36beb3f 894AVCodec ff_truemotion1_decoder = {
ec6402b7
AK
895 .name = "truemotion1",
896 .type = AVMEDIA_TYPE_VIDEO,
897 .id = CODEC_ID_TRUEMOTION1,
898 .priv_data_size = sizeof(TrueMotion1Context),
899 .init = truemotion1_decode_init,
900 .close = truemotion1_decode_end,
901 .decode = truemotion1_decode_frame,
902 .capabilities = CODEC_CAP_DR1,
fe4bf374 903 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
9a4117d5 904};