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00032 #include <stdio.h>
00033 #include <stdlib.h>
00034 #include <string.h>
00035 #include <unistd.h>
00036
00037 #include "avcodec.h"
00038 #include "dsputil.h"
00039
00040 #include "truemotion1data.h"
00041
00042 typedef struct TrueMotion1Context {
00043 AVCodecContext *avctx;
00044 AVFrame frame;
00045
00046 const uint8_t *buf;
00047 int size;
00048
00049 const uint8_t *mb_change_bits;
00050 int mb_change_bits_row_size;
00051 const uint8_t *index_stream;
00052 int index_stream_size;
00053
00054 int flags;
00055 int x, y, w, h;
00056
00057 uint32_t y_predictor_table[1024];
00058 uint32_t c_predictor_table[1024];
00059 uint32_t fat_y_predictor_table[1024];
00060 uint32_t fat_c_predictor_table[1024];
00061
00062 int compression;
00063 int block_type;
00064 int block_width;
00065 int block_height;
00066
00067 int16_t ydt[8];
00068 int16_t cdt[8];
00069 int16_t fat_ydt[8];
00070 int16_t fat_cdt[8];
00071
00072 int last_deltaset, last_vectable;
00073
00074 unsigned int *vert_pred;
00075
00076 } TrueMotion1Context;
00077
00078 #define FLAG_SPRITE 32
00079 #define FLAG_KEYFRAME 16
00080 #define FLAG_INTERFRAME 8
00081 #define FLAG_INTERPOLATED 4
00082
00083 struct frame_header {
00084 uint8_t header_size;
00085 uint8_t compression;
00086 uint8_t deltaset;
00087 uint8_t vectable;
00088 uint16_t ysize;
00089 uint16_t xsize;
00090 uint16_t checksum;
00091 uint8_t version;
00092 uint8_t header_type;
00093 uint8_t flags;
00094 uint8_t control;
00095 uint16_t xoffset;
00096 uint16_t yoffset;
00097 uint16_t width;
00098 uint16_t height;
00099 };
00100
00101 #define ALGO_NOP 0
00102 #define ALGO_RGB16V 1
00103 #define ALGO_RGB16H 2
00104 #define ALGO_RGB24H 3
00105
00106
00107 #define BLOCK_2x2 0
00108 #define BLOCK_2x4 1
00109 #define BLOCK_4x2 2
00110 #define BLOCK_4x4 3
00111
00112 typedef struct comp_types {
00113 int algorithm;
00114 int block_width;
00115 int block_height;
00116 int block_type;
00117 } comp_types;
00118
00119
00120 static const comp_types compression_types[17] = {
00121 { ALGO_NOP, 0, 0, 0 },
00122
00123 { ALGO_RGB16V, 4, 4, BLOCK_4x4 },
00124 { ALGO_RGB16H, 4, 4, BLOCK_4x4 },
00125 { ALGO_RGB16V, 4, 2, BLOCK_4x2 },
00126 { ALGO_RGB16H, 4, 2, BLOCK_4x2 },
00127
00128 { ALGO_RGB16V, 2, 4, BLOCK_2x4 },
00129 { ALGO_RGB16H, 2, 4, BLOCK_2x4 },
00130 { ALGO_RGB16V, 2, 2, BLOCK_2x2 },
00131 { ALGO_RGB16H, 2, 2, BLOCK_2x2 },
00132
00133 { ALGO_NOP, 4, 4, BLOCK_4x4 },
00134 { ALGO_RGB24H, 4, 4, BLOCK_4x4 },
00135 { ALGO_NOP, 4, 2, BLOCK_4x2 },
00136 { ALGO_RGB24H, 4, 2, BLOCK_4x2 },
00137
00138 { ALGO_NOP, 2, 4, BLOCK_2x4 },
00139 { ALGO_RGB24H, 2, 4, BLOCK_2x4 },
00140 { ALGO_NOP, 2, 2, BLOCK_2x2 },
00141 { ALGO_RGB24H, 2, 2, BLOCK_2x2 }
00142 };
00143
00144 static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
00145 {
00146 int i;
00147
00148 if (delta_table_index > 3)
00149 return;
00150
00151 memcpy(s->ydt, ydts[delta_table_index], 8 * sizeof(int16_t));
00152 memcpy(s->cdt, cdts[delta_table_index], 8 * sizeof(int16_t));
00153 memcpy(s->fat_ydt, fat_ydts[delta_table_index], 8 * sizeof(int16_t));
00154 memcpy(s->fat_cdt, fat_cdts[delta_table_index], 8 * sizeof(int16_t));
00155
00156
00157
00158 for (i = 0; i < 8; i++)
00159 {
00160
00161
00162 s->ydt[i] &= 0xFFFE;
00163 s->ydt[i] /= 2;
00164 }
00165 }
00166
00167 #ifdef WORDS_BIGENDIAN
00168 static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
00169 #else
00170 static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
00171 #endif
00172 {
00173 int lo, hi;
00174
00175 lo = ydt[p1];
00176 lo += (lo << 5) + (lo << 10);
00177 hi = ydt[p2];
00178 hi += (hi << 5) + (hi << 10);
00179 return (lo + (hi << 16)) << 1;
00180 }
00181
00182 #ifdef WORDS_BIGENDIAN
00183 static int make_cdt15_entry(int p2, int p1, int16_t *cdt)
00184 #else
00185 static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
00186 #endif
00187 {
00188 int r, b, lo;
00189
00190 b = cdt[p2];
00191 r = cdt[p1] << 10;
00192 lo = b + r;
00193 return (lo + (lo << 16)) << 1;
00194 }
00195
00196 #ifdef WORDS_BIGENDIAN
00197 static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
00198 #else
00199 static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
00200 #endif
00201 {
00202 int lo, hi;
00203
00204 lo = ydt[p1];
00205 lo += (lo << 6) + (lo << 11);
00206 hi = ydt[p2];
00207 hi += (hi << 6) + (hi << 11);
00208 return (lo + (hi << 16)) << 1;
00209 }
00210
00211 #ifdef WORDS_BIGENDIAN
00212 static int make_cdt16_entry(int p2, int p1, int16_t *cdt)
00213 #else
00214 static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
00215 #endif
00216 {
00217 int r, b, lo;
00218
00219 b = cdt[p2];
00220 r = cdt[p1] << 11;
00221 lo = b + r;
00222 return (lo + (lo << 16)) << 1;
00223 }
00224
00225 #ifdef WORDS_BIGENDIAN
00226 static int make_ydt24_entry(int p2, int p1, int16_t *ydt)
00227 #else
00228 static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
00229 #endif
00230 {
00231 int lo, hi;
00232
00233 lo = ydt[p1];
00234 hi = ydt[p2];
00235 return (lo + (hi << 8) + (hi << 16)) << 1;
00236 }
00237
00238 #ifdef WORDS_BIGENDIAN
00239 static int make_cdt24_entry(int p2, int p1, int16_t *cdt)
00240 #else
00241 static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
00242 #endif
00243 {
00244 int r, b;
00245
00246 b = cdt[p2];
00247 r = cdt[p1]<<16;
00248 return (b+r) << 1;
00249 }
00250
00251 static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
00252 {
00253 int len, i, j;
00254 unsigned char delta_pair;
00255
00256 for (i = 0; i < 1024; i += 4)
00257 {
00258 len = *sel_vector_table++ / 2;
00259 for (j = 0; j < len; j++)
00260 {
00261 delta_pair = *sel_vector_table++;
00262 s->y_predictor_table[i+j] = 0xfffffffe &
00263 make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
00264 s->c_predictor_table[i+j] = 0xfffffffe &
00265 make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
00266 }
00267 s->y_predictor_table[i+(j-1)] |= 1;
00268 s->c_predictor_table[i+(j-1)] |= 1;
00269 }
00270 }
00271
00272 static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
00273 {
00274 int len, i, j;
00275 unsigned char delta_pair;
00276
00277 for (i = 0; i < 1024; i += 4)
00278 {
00279 len = *sel_vector_table++ / 2;
00280 for (j = 0; j < len; j++)
00281 {
00282 delta_pair = *sel_vector_table++;
00283 s->y_predictor_table[i+j] = 0xfffffffe &
00284 make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
00285 s->c_predictor_table[i+j] = 0xfffffffe &
00286 make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
00287 }
00288 s->y_predictor_table[i+(j-1)] |= 1;
00289 s->c_predictor_table[i+(j-1)] |= 1;
00290 }
00291 }
00292
00293 static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
00294 {
00295 int len, i, j;
00296 unsigned char delta_pair;
00297
00298 for (i = 0; i < 1024; i += 4)
00299 {
00300 len = *sel_vector_table++ / 2;
00301 for (j = 0; j < len; j++)
00302 {
00303 delta_pair = *sel_vector_table++;
00304 s->y_predictor_table[i+j] = 0xfffffffe &
00305 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
00306 s->c_predictor_table[i+j] = 0xfffffffe &
00307 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
00308 s->fat_y_predictor_table[i+j] = 0xfffffffe &
00309 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
00310 s->fat_c_predictor_table[i+j] = 0xfffffffe &
00311 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
00312 }
00313 s->y_predictor_table[i+(j-1)] |= 1;
00314 s->c_predictor_table[i+(j-1)] |= 1;
00315 s->fat_y_predictor_table[i+(j-1)] |= 1;
00316 s->fat_c_predictor_table[i+(j-1)] |= 1;
00317 }
00318 }
00319
00320
00321
00322 static int truemotion1_decode_header(TrueMotion1Context *s)
00323 {
00324 int i;
00325 struct frame_header header;
00326 uint8_t header_buffer[128];
00327 const uint8_t *sel_vector_table;
00328
00329
00330
00331
00332 s->mb_change_bits_row_size = ((s->avctx->width >> 2) + 7) >> 3;
00333
00334 header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
00335 if (s->buf[0] < 0x10)
00336 {
00337 av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
00338 return -1;
00339 }
00340
00341
00342 memset(header_buffer, 0, 128);
00343 for (i = 1; i < header.header_size; i++)
00344 header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
00345
00346 header.compression = header_buffer[0];
00347 header.deltaset = header_buffer[1];
00348 header.vectable = header_buffer[2];
00349 header.ysize = AV_RL16(&header_buffer[3]);
00350 header.xsize = AV_RL16(&header_buffer[5]);
00351 header.checksum = AV_RL16(&header_buffer[7]);
00352 header.version = header_buffer[9];
00353 header.header_type = header_buffer[10];
00354 header.flags = header_buffer[11];
00355 header.control = header_buffer[12];
00356
00357
00358 if (header.version >= 2)
00359 {
00360 if (header.header_type > 3)
00361 {
00362 av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
00363 return -1;
00364 } else if ((header.header_type == 2) || (header.header_type == 3)) {
00365 s->flags = header.flags;
00366 if (!(s->flags & FLAG_INTERFRAME))
00367 s->flags |= FLAG_KEYFRAME;
00368 } else
00369 s->flags = FLAG_KEYFRAME;
00370 } else
00371 s->flags = FLAG_KEYFRAME;
00372
00373 if (s->flags & FLAG_SPRITE) {
00374 av_log(s->avctx, AV_LOG_INFO, "SPRITE frame found, please report the sample to the developers\n");
00375
00376 #if 0
00377 s->w = header.width;
00378 s->h = header.height;
00379 s->x = header.xoffset;
00380 s->y = header.yoffset;
00381 #else
00382 return -1;
00383 #endif
00384 } else {
00385 s->w = header.xsize;
00386 s->h = header.ysize;
00387 if (header.header_type < 2) {
00388 if ((s->w < 213) && (s->h >= 176))
00389 {
00390 s->flags |= FLAG_INTERPOLATED;
00391 av_log(s->avctx, AV_LOG_INFO, "INTERPOLATION selected, please report the sample to the developers\n");
00392 }
00393 }
00394 }
00395
00396 if (header.compression >= 17) {
00397 av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
00398 return -1;
00399 }
00400
00401 if ((header.deltaset != s->last_deltaset) ||
00402 (header.vectable != s->last_vectable))
00403 select_delta_tables(s, header.deltaset);
00404
00405 if ((header.compression & 1) && header.header_type)
00406 sel_vector_table = pc_tbl2;
00407 else {
00408 if (header.vectable < 4)
00409 sel_vector_table = tables[header.vectable - 1];
00410 else {
00411 av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
00412 return -1;
00413 }
00414 }
00415
00416
00417 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
00418 s->avctx->pix_fmt = PIX_FMT_RGB32;
00419 else
00420 s->avctx->pix_fmt = PIX_FMT_RGB555;
00421
00422 if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
00423 {
00424 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
00425 gen_vector_table24(s, sel_vector_table);
00426 else
00427 if (s->avctx->pix_fmt == PIX_FMT_RGB555)
00428 gen_vector_table15(s, sel_vector_table);
00429 else
00430 gen_vector_table16(s, sel_vector_table);
00431 }
00432
00433
00434 s->mb_change_bits = s->buf + header.header_size;
00435 if (s->flags & FLAG_KEYFRAME) {
00436
00437 s->index_stream = s->mb_change_bits;
00438 } else {
00439
00440 s->index_stream = s->mb_change_bits +
00441 (s->mb_change_bits_row_size * (s->avctx->height >> 2));
00442 }
00443 s->index_stream_size = s->size - (s->index_stream - s->buf);
00444
00445 s->last_deltaset = header.deltaset;
00446 s->last_vectable = header.vectable;
00447 s->compression = header.compression;
00448 s->block_width = compression_types[header.compression].block_width;
00449 s->block_height = compression_types[header.compression].block_height;
00450 s->block_type = compression_types[header.compression].block_type;
00451
00452 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
00453 av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
00454 s->last_deltaset, s->last_vectable, s->compression, s->block_width,
00455 s->block_height, s->block_type,
00456 s->flags & FLAG_KEYFRAME ? " KEY" : "",
00457 s->flags & FLAG_INTERFRAME ? " INTER" : "",
00458 s->flags & FLAG_SPRITE ? " SPRITE" : "",
00459 s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
00460
00461 return header.header_size;
00462 }
00463
00464 static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
00465 {
00466 TrueMotion1Context *s = avctx->priv_data;
00467
00468 s->avctx = avctx;
00469
00470
00471
00472
00473
00474
00475
00476 s->frame.data[0] = NULL;
00477
00478
00479
00480 s->vert_pred =
00481 (unsigned int *)av_malloc(s->avctx->width * sizeof(unsigned int));
00482
00483 return 0;
00484 }
00485
00486
00487
00488
00489
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00492
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00504
00505
00506
00507
00508
00509
00510
00511
00512 #define GET_NEXT_INDEX() \
00513 {\
00514 if (index_stream_index >= s->index_stream_size) { \
00515 av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
00516 return; \
00517 } \
00518 index = s->index_stream[index_stream_index++] * 4; \
00519 }
00520
00521 #define APPLY_C_PREDICTOR() \
00522 predictor_pair = s->c_predictor_table[index]; \
00523 horiz_pred += (predictor_pair >> 1); \
00524 if (predictor_pair & 1) { \
00525 GET_NEXT_INDEX() \
00526 if (!index) { \
00527 GET_NEXT_INDEX() \
00528 predictor_pair = s->c_predictor_table[index]; \
00529 horiz_pred += ((predictor_pair >> 1) * 5); \
00530 if (predictor_pair & 1) \
00531 GET_NEXT_INDEX() \
00532 else \
00533 index++; \
00534 } \
00535 } else \
00536 index++;
00537
00538 #define APPLY_C_PREDICTOR_24() \
00539 predictor_pair = s->c_predictor_table[index]; \
00540 horiz_pred += (predictor_pair >> 1); \
00541 if (predictor_pair & 1) { \
00542 GET_NEXT_INDEX() \
00543 if (!index) { \
00544 GET_NEXT_INDEX() \
00545 predictor_pair = s->fat_c_predictor_table[index]; \
00546 horiz_pred += (predictor_pair >> 1); \
00547 if (predictor_pair & 1) \
00548 GET_NEXT_INDEX() \
00549 else \
00550 index++; \
00551 } \
00552 } else \
00553 index++;
00554
00555
00556 #define APPLY_Y_PREDICTOR() \
00557 predictor_pair = s->y_predictor_table[index]; \
00558 horiz_pred += (predictor_pair >> 1); \
00559 if (predictor_pair & 1) { \
00560 GET_NEXT_INDEX() \
00561 if (!index) { \
00562 GET_NEXT_INDEX() \
00563 predictor_pair = s->y_predictor_table[index]; \
00564 horiz_pred += ((predictor_pair >> 1) * 5); \
00565 if (predictor_pair & 1) \
00566 GET_NEXT_INDEX() \
00567 else \
00568 index++; \
00569 } \
00570 } else \
00571 index++;
00572
00573 #define APPLY_Y_PREDICTOR_24() \
00574 predictor_pair = s->y_predictor_table[index]; \
00575 horiz_pred += (predictor_pair >> 1); \
00576 if (predictor_pair & 1) { \
00577 GET_NEXT_INDEX() \
00578 if (!index) { \
00579 GET_NEXT_INDEX() \
00580 predictor_pair = s->fat_y_predictor_table[index]; \
00581 horiz_pred += (predictor_pair >> 1); \
00582 if (predictor_pair & 1) \
00583 GET_NEXT_INDEX() \
00584 else \
00585 index++; \
00586 } \
00587 } else \
00588 index++;
00589
00590 #define OUTPUT_PIXEL_PAIR() \
00591 *current_pixel_pair = *vert_pred + horiz_pred; \
00592 *vert_pred++ = *current_pixel_pair++;
00593
00594 static void truemotion1_decode_16bit(TrueMotion1Context *s)
00595 {
00596 int y;
00597 int pixels_left;
00598 unsigned int predictor_pair;
00599 unsigned int horiz_pred;
00600 unsigned int *vert_pred;
00601 unsigned int *current_pixel_pair;
00602 unsigned char *current_line = s->frame.data[0];
00603 int keyframe = s->flags & FLAG_KEYFRAME;
00604
00605
00606 const unsigned char *mb_change_bits = s->mb_change_bits;
00607 unsigned char mb_change_byte;
00608 unsigned char mb_change_byte_mask;
00609 int mb_change_index;
00610
00611
00612 int index_stream_index = 0;
00613 int index;
00614
00615
00616 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
00617
00618 GET_NEXT_INDEX();
00619
00620 for (y = 0; y < s->avctx->height; y++) {
00621
00622
00623 horiz_pred = 0;
00624 current_pixel_pair = (unsigned int *)current_line;
00625 vert_pred = s->vert_pred;
00626 mb_change_index = 0;
00627 mb_change_byte = mb_change_bits[mb_change_index++];
00628 mb_change_byte_mask = 0x01;
00629 pixels_left = s->avctx->width;
00630
00631 while (pixels_left > 0) {
00632
00633 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
00634
00635 switch (y & 3) {
00636 case 0:
00637
00638
00639 if (s->block_width == 2) {
00640 APPLY_C_PREDICTOR();
00641 APPLY_Y_PREDICTOR();
00642 OUTPUT_PIXEL_PAIR();
00643 APPLY_C_PREDICTOR();
00644 APPLY_Y_PREDICTOR();
00645 OUTPUT_PIXEL_PAIR();
00646 } else {
00647 APPLY_C_PREDICTOR();
00648 APPLY_Y_PREDICTOR();
00649 OUTPUT_PIXEL_PAIR();
00650 APPLY_Y_PREDICTOR();
00651 OUTPUT_PIXEL_PAIR();
00652 }
00653 break;
00654
00655 case 1:
00656 case 3:
00657
00658 APPLY_Y_PREDICTOR();
00659 OUTPUT_PIXEL_PAIR();
00660 APPLY_Y_PREDICTOR();
00661 OUTPUT_PIXEL_PAIR();
00662 break;
00663
00664 case 2:
00665
00666
00667 if (s->block_type == BLOCK_2x2) {
00668 APPLY_C_PREDICTOR();
00669 APPLY_Y_PREDICTOR();
00670 OUTPUT_PIXEL_PAIR();
00671 APPLY_C_PREDICTOR();
00672 APPLY_Y_PREDICTOR();
00673 OUTPUT_PIXEL_PAIR();
00674 } else if (s->block_type == BLOCK_4x2) {
00675 APPLY_C_PREDICTOR();
00676 APPLY_Y_PREDICTOR();
00677 OUTPUT_PIXEL_PAIR();
00678 APPLY_Y_PREDICTOR();
00679 OUTPUT_PIXEL_PAIR();
00680 } else {
00681 APPLY_Y_PREDICTOR();
00682 OUTPUT_PIXEL_PAIR();
00683 APPLY_Y_PREDICTOR();
00684 OUTPUT_PIXEL_PAIR();
00685 }
00686 break;
00687 }
00688
00689 } else {
00690
00691
00692
00693 *vert_pred++ = *current_pixel_pair++;
00694 horiz_pred = *current_pixel_pair - *vert_pred;
00695 *vert_pred++ = *current_pixel_pair++;
00696
00697 }
00698
00699 if (!keyframe) {
00700 mb_change_byte_mask <<= 1;
00701
00702
00703 if (!mb_change_byte_mask) {
00704 mb_change_byte = mb_change_bits[mb_change_index++];
00705 mb_change_byte_mask = 0x01;
00706 }
00707 }
00708
00709 pixels_left -= 4;
00710 }
00711
00712
00713 if (((y + 1) & 3) == 0)
00714 mb_change_bits += s->mb_change_bits_row_size;
00715
00716 current_line += s->frame.linesize[0];
00717 }
00718 }
00719
00720 static void truemotion1_decode_24bit(TrueMotion1Context *s)
00721 {
00722 int y;
00723 int pixels_left;
00724 unsigned int predictor_pair;
00725 unsigned int horiz_pred;
00726 unsigned int *vert_pred;
00727 unsigned int *current_pixel_pair;
00728 unsigned char *current_line = s->frame.data[0];
00729 int keyframe = s->flags & FLAG_KEYFRAME;
00730
00731
00732 const unsigned char *mb_change_bits = s->mb_change_bits;
00733 unsigned char mb_change_byte;
00734 unsigned char mb_change_byte_mask;
00735 int mb_change_index;
00736
00737
00738 int index_stream_index = 0;
00739 int index;
00740
00741
00742 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
00743
00744 GET_NEXT_INDEX();
00745
00746 for (y = 0; y < s->avctx->height; y++) {
00747
00748
00749 horiz_pred = 0;
00750 current_pixel_pair = (unsigned int *)current_line;
00751 vert_pred = s->vert_pred;
00752 mb_change_index = 0;
00753 mb_change_byte = mb_change_bits[mb_change_index++];
00754 mb_change_byte_mask = 0x01;
00755 pixels_left = s->avctx->width;
00756
00757 while (pixels_left > 0) {
00758
00759 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
00760
00761 switch (y & 3) {
00762 case 0:
00763
00764
00765 if (s->block_width == 2) {
00766 APPLY_C_PREDICTOR_24();
00767 APPLY_Y_PREDICTOR_24();
00768 OUTPUT_PIXEL_PAIR();
00769 APPLY_C_PREDICTOR_24();
00770 APPLY_Y_PREDICTOR_24();
00771 OUTPUT_PIXEL_PAIR();
00772 } else {
00773 APPLY_C_PREDICTOR_24();
00774 APPLY_Y_PREDICTOR_24();
00775 OUTPUT_PIXEL_PAIR();
00776 APPLY_Y_PREDICTOR_24();
00777 OUTPUT_PIXEL_PAIR();
00778 }
00779 break;
00780
00781 case 1:
00782 case 3:
00783
00784 APPLY_Y_PREDICTOR_24();
00785 OUTPUT_PIXEL_PAIR();
00786 APPLY_Y_PREDICTOR_24();
00787 OUTPUT_PIXEL_PAIR();
00788 break;
00789
00790 case 2:
00791
00792
00793 if (s->block_type == BLOCK_2x2) {
00794 APPLY_C_PREDICTOR_24();
00795 APPLY_Y_PREDICTOR_24();
00796 OUTPUT_PIXEL_PAIR();
00797 APPLY_C_PREDICTOR_24();
00798 APPLY_Y_PREDICTOR_24();
00799 OUTPUT_PIXEL_PAIR();
00800 } else if (s->block_type == BLOCK_4x2) {
00801 APPLY_C_PREDICTOR_24();
00802 APPLY_Y_PREDICTOR_24();
00803 OUTPUT_PIXEL_PAIR();
00804 APPLY_Y_PREDICTOR_24();
00805 OUTPUT_PIXEL_PAIR();
00806 } else {
00807 APPLY_Y_PREDICTOR_24();
00808 OUTPUT_PIXEL_PAIR();
00809 APPLY_Y_PREDICTOR_24();
00810 OUTPUT_PIXEL_PAIR();
00811 }
00812 break;
00813 }
00814
00815 } else {
00816
00817
00818
00819 *vert_pred++ = *current_pixel_pair++;
00820 horiz_pred = *current_pixel_pair - *vert_pred;
00821 *vert_pred++ = *current_pixel_pair++;
00822
00823 }
00824
00825 if (!keyframe) {
00826 mb_change_byte_mask <<= 1;
00827
00828
00829 if (!mb_change_byte_mask) {
00830 mb_change_byte = mb_change_bits[mb_change_index++];
00831 mb_change_byte_mask = 0x01;
00832 }
00833 }
00834
00835 pixels_left -= 4;
00836 }
00837
00838
00839 if (((y + 1) & 3) == 0)
00840 mb_change_bits += s->mb_change_bits_row_size;
00841
00842 current_line += s->frame.linesize[0];
00843 }
00844 }
00845
00846
00847 static int truemotion1_decode_frame(AVCodecContext *avctx,
00848 void *data, int *data_size,
00849 const uint8_t *buf, int buf_size)
00850 {
00851 TrueMotion1Context *s = avctx->priv_data;
00852
00853 s->buf = buf;
00854 s->size = buf_size;
00855
00856 if (truemotion1_decode_header(s) == -1)
00857 return -1;
00858
00859 s->frame.reference = 1;
00860 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
00861 FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
00862 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
00863 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00864 return -1;
00865 }
00866
00867 if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
00868 truemotion1_decode_24bit(s);
00869 } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
00870 truemotion1_decode_16bit(s);
00871 }
00872
00873 *data_size = sizeof(AVFrame);
00874 *(AVFrame*)data = s->frame;
00875
00876
00877 return buf_size;
00878 }
00879
00880 static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
00881 {
00882 TrueMotion1Context *s = avctx->priv_data;
00883
00884 if (s->frame.data[0])
00885 avctx->release_buffer(avctx, &s->frame);
00886
00887 av_free(s->vert_pred);
00888
00889 return 0;
00890 }
00891
00892 AVCodec truemotion1_decoder = {
00893 "truemotion1",
00894 CODEC_TYPE_VIDEO,
00895 CODEC_ID_TRUEMOTION1,
00896 sizeof(TrueMotion1Context),
00897 truemotion1_decode_init,
00898 NULL,
00899 truemotion1_decode_end,
00900 truemotion1_decode_frame,
00901 CODEC_CAP_DR1,
00902 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
00903 };