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00032 #include <stdio.h>
00033 #include <stdlib.h>
00034 #include <string.h>
00035
00036 #include "avcodec.h"
00037 #include "dsputil.h"
00038 #include "libavutil/imgutils.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 int vert_pred_size;
00076
00077 } TrueMotion1Context;
00078
00079 #define FLAG_SPRITE 32
00080 #define FLAG_KEYFRAME 16
00081 #define FLAG_INTERFRAME 8
00082 #define FLAG_INTERPOLATED 4
00083
00084 struct frame_header {
00085 uint8_t header_size;
00086 uint8_t compression;
00087 uint8_t deltaset;
00088 uint8_t vectable;
00089 uint16_t ysize;
00090 uint16_t xsize;
00091 uint16_t checksum;
00092 uint8_t version;
00093 uint8_t header_type;
00094 uint8_t flags;
00095 uint8_t control;
00096 uint16_t xoffset;
00097 uint16_t yoffset;
00098 uint16_t width;
00099 uint16_t height;
00100 };
00101
00102 #define ALGO_NOP 0
00103 #define ALGO_RGB16V 1
00104 #define ALGO_RGB16H 2
00105 #define ALGO_RGB24H 3
00106
00107
00108 #define BLOCK_2x2 0
00109 #define BLOCK_2x4 1
00110 #define BLOCK_4x2 2
00111 #define BLOCK_4x4 3
00112
00113 typedef struct comp_types {
00114 int algorithm;
00115 int block_width;
00116 int block_height;
00117 int block_type;
00118 } comp_types;
00119
00120
00121 static const comp_types compression_types[17] = {
00122 { ALGO_NOP, 0, 0, 0 },
00123
00124 { ALGO_RGB16V, 4, 4, BLOCK_4x4 },
00125 { ALGO_RGB16H, 4, 4, BLOCK_4x4 },
00126 { ALGO_RGB16V, 4, 2, BLOCK_4x2 },
00127 { ALGO_RGB16H, 4, 2, BLOCK_4x2 },
00128
00129 { ALGO_RGB16V, 2, 4, BLOCK_2x4 },
00130 { ALGO_RGB16H, 2, 4, BLOCK_2x4 },
00131 { ALGO_RGB16V, 2, 2, BLOCK_2x2 },
00132 { ALGO_RGB16H, 2, 2, BLOCK_2x2 },
00133
00134 { ALGO_NOP, 4, 4, BLOCK_4x4 },
00135 { ALGO_RGB24H, 4, 4, BLOCK_4x4 },
00136 { ALGO_NOP, 4, 2, BLOCK_4x2 },
00137 { ALGO_RGB24H, 4, 2, BLOCK_4x2 },
00138
00139 { ALGO_NOP, 2, 4, BLOCK_2x4 },
00140 { ALGO_RGB24H, 2, 4, BLOCK_2x4 },
00141 { ALGO_NOP, 2, 2, BLOCK_2x2 },
00142 { ALGO_RGB24H, 2, 2, BLOCK_2x2 }
00143 };
00144
00145 static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
00146 {
00147 int i;
00148
00149 if (delta_table_index > 3)
00150 return;
00151
00152 memcpy(s->ydt, ydts[delta_table_index], 8 * sizeof(int16_t));
00153 memcpy(s->cdt, cdts[delta_table_index], 8 * sizeof(int16_t));
00154 memcpy(s->fat_ydt, fat_ydts[delta_table_index], 8 * sizeof(int16_t));
00155 memcpy(s->fat_cdt, fat_cdts[delta_table_index], 8 * sizeof(int16_t));
00156
00157
00158
00159 for (i = 0; i < 8; i++)
00160 {
00161
00162
00163 s->ydt[i] &= 0xFFFE;
00164 s->ydt[i] /= 2;
00165 }
00166 }
00167
00168 #if HAVE_BIGENDIAN
00169 static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
00170 #else
00171 static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
00172 #endif
00173 {
00174 int lo, hi;
00175
00176 lo = ydt[p1];
00177 lo += (lo << 5) + (lo << 10);
00178 hi = ydt[p2];
00179 hi += (hi << 5) + (hi << 10);
00180 return (lo + (hi << 16)) << 1;
00181 }
00182
00183 static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
00184 {
00185 int r, b, lo;
00186
00187 b = cdt[p2];
00188 r = cdt[p1] << 10;
00189 lo = b + r;
00190 return (lo + (lo << 16)) << 1;
00191 }
00192
00193 #if HAVE_BIGENDIAN
00194 static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
00195 #else
00196 static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
00197 #endif
00198 {
00199 int lo, hi;
00200
00201 lo = ydt[p1];
00202 lo += (lo << 6) + (lo << 11);
00203 hi = ydt[p2];
00204 hi += (hi << 6) + (hi << 11);
00205 return (lo + (hi << 16)) << 1;
00206 }
00207
00208 static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
00209 {
00210 int r, b, lo;
00211
00212 b = cdt[p2];
00213 r = cdt[p1] << 11;
00214 lo = b + r;
00215 return (lo + (lo << 16)) << 1;
00216 }
00217
00218 static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
00219 {
00220 int lo, hi;
00221
00222 lo = ydt[p1];
00223 hi = ydt[p2];
00224 return (lo + (hi << 8) + (hi << 16)) << 1;
00225 }
00226
00227 static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
00228 {
00229 int r, b;
00230
00231 b = cdt[p2];
00232 r = cdt[p1]<<16;
00233 return (b+r) << 1;
00234 }
00235
00236 static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
00237 {
00238 int len, i, j;
00239 unsigned char delta_pair;
00240
00241 for (i = 0; i < 1024; i += 4)
00242 {
00243 len = *sel_vector_table++ / 2;
00244 for (j = 0; j < len; j++)
00245 {
00246 delta_pair = *sel_vector_table++;
00247 s->y_predictor_table[i+j] = 0xfffffffe &
00248 make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
00249 s->c_predictor_table[i+j] = 0xfffffffe &
00250 make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
00251 }
00252 s->y_predictor_table[i+(j-1)] |= 1;
00253 s->c_predictor_table[i+(j-1)] |= 1;
00254 }
00255 }
00256
00257 static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
00258 {
00259 int len, i, j;
00260 unsigned char delta_pair;
00261
00262 for (i = 0; i < 1024; i += 4)
00263 {
00264 len = *sel_vector_table++ / 2;
00265 for (j = 0; j < len; j++)
00266 {
00267 delta_pair = *sel_vector_table++;
00268 s->y_predictor_table[i+j] = 0xfffffffe &
00269 make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
00270 s->c_predictor_table[i+j] = 0xfffffffe &
00271 make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
00272 }
00273 s->y_predictor_table[i+(j-1)] |= 1;
00274 s->c_predictor_table[i+(j-1)] |= 1;
00275 }
00276 }
00277
00278 static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
00279 {
00280 int len, i, j;
00281 unsigned char delta_pair;
00282
00283 for (i = 0; i < 1024; i += 4)
00284 {
00285 len = *sel_vector_table++ / 2;
00286 for (j = 0; j < len; j++)
00287 {
00288 delta_pair = *sel_vector_table++;
00289 s->y_predictor_table[i+j] = 0xfffffffe &
00290 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
00291 s->c_predictor_table[i+j] = 0xfffffffe &
00292 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
00293 s->fat_y_predictor_table[i+j] = 0xfffffffe &
00294 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
00295 s->fat_c_predictor_table[i+j] = 0xfffffffe &
00296 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
00297 }
00298 s->y_predictor_table[i+(j-1)] |= 1;
00299 s->c_predictor_table[i+(j-1)] |= 1;
00300 s->fat_y_predictor_table[i+(j-1)] |= 1;
00301 s->fat_c_predictor_table[i+(j-1)] |= 1;
00302 }
00303 }
00304
00305
00306
00307 static int truemotion1_decode_header(TrueMotion1Context *s)
00308 {
00309 int i;
00310 int width_shift = 0;
00311 int new_pix_fmt;
00312 struct frame_header header;
00313 uint8_t header_buffer[128];
00314 const uint8_t *sel_vector_table;
00315
00316 header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
00317 if (s->buf[0] < 0x10)
00318 {
00319 av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
00320 return -1;
00321 }
00322
00323 if (header.header_size + 1 > s->size) {
00324 av_log(s->avctx, AV_LOG_ERROR, "Input packet too small.\n");
00325 return AVERROR_INVALIDDATA;
00326 }
00327
00328
00329 memset(header_buffer, 0, 128);
00330 for (i = 1; i < header.header_size; i++)
00331 header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
00332
00333 header.compression = header_buffer[0];
00334 header.deltaset = header_buffer[1];
00335 header.vectable = header_buffer[2];
00336 header.ysize = AV_RL16(&header_buffer[3]);
00337 header.xsize = AV_RL16(&header_buffer[5]);
00338 header.checksum = AV_RL16(&header_buffer[7]);
00339 header.version = header_buffer[9];
00340 header.header_type = header_buffer[10];
00341 header.flags = header_buffer[11];
00342 header.control = header_buffer[12];
00343
00344
00345 if (header.version >= 2)
00346 {
00347 if (header.header_type > 3)
00348 {
00349 av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
00350 return -1;
00351 } else if ((header.header_type == 2) || (header.header_type == 3)) {
00352 s->flags = header.flags;
00353 if (!(s->flags & FLAG_INTERFRAME))
00354 s->flags |= FLAG_KEYFRAME;
00355 } else
00356 s->flags = FLAG_KEYFRAME;
00357 } else
00358 s->flags = FLAG_KEYFRAME;
00359
00360 if (s->flags & FLAG_SPRITE) {
00361 av_log_ask_for_sample(s->avctx, "SPRITE frame found.\n");
00362
00363 #if 0
00364 s->w = header.width;
00365 s->h = header.height;
00366 s->x = header.xoffset;
00367 s->y = header.yoffset;
00368 #else
00369 return -1;
00370 #endif
00371 } else {
00372 s->w = header.xsize;
00373 s->h = header.ysize;
00374 if (header.header_type < 2) {
00375 if ((s->w < 213) && (s->h >= 176))
00376 {
00377 s->flags |= FLAG_INTERPOLATED;
00378 av_log_ask_for_sample(s->avctx, "INTERPOLATION selected.\n");
00379 }
00380 }
00381 }
00382
00383 if (header.compression >= 17) {
00384 av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
00385 return -1;
00386 }
00387
00388 if ((header.deltaset != s->last_deltaset) ||
00389 (header.vectable != s->last_vectable))
00390 select_delta_tables(s, header.deltaset);
00391
00392 if ((header.compression & 1) && header.header_type)
00393 sel_vector_table = pc_tbl2;
00394 else {
00395 if (header.vectable > 0 && header.vectable < 4)
00396 sel_vector_table = tables[header.vectable - 1];
00397 else {
00398 av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
00399 return -1;
00400 }
00401 }
00402
00403 if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
00404 new_pix_fmt = PIX_FMT_RGB32;
00405 width_shift = 1;
00406 } else
00407 new_pix_fmt = PIX_FMT_RGB555;
00408
00409 s->w >>= width_shift;
00410 if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
00411 return -1;
00412
00413 if (s->w != s->avctx->width || s->h != s->avctx->height ||
00414 new_pix_fmt != s->avctx->pix_fmt) {
00415 if (s->frame.data[0])
00416 s->avctx->release_buffer(s->avctx, &s->frame);
00417 s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
00418 s->avctx->pix_fmt = new_pix_fmt;
00419 avcodec_set_dimensions(s->avctx, s->w, s->h);
00420 av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
00421 }
00422
00423
00424
00425
00426 s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
00427
00428 if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
00429 {
00430 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
00431 gen_vector_table24(s, sel_vector_table);
00432 else
00433 if (s->avctx->pix_fmt == PIX_FMT_RGB555)
00434 gen_vector_table15(s, sel_vector_table);
00435 else
00436 gen_vector_table16(s, sel_vector_table);
00437 }
00438
00439
00440 s->mb_change_bits = s->buf + header.header_size;
00441 if (s->flags & FLAG_KEYFRAME) {
00442
00443 s->index_stream = s->mb_change_bits;
00444 } else {
00445
00446 s->index_stream = s->mb_change_bits +
00447 (s->mb_change_bits_row_size * (s->avctx->height >> 2));
00448 }
00449 s->index_stream_size = s->size - (s->index_stream - s->buf);
00450
00451 s->last_deltaset = header.deltaset;
00452 s->last_vectable = header.vectable;
00453 s->compression = header.compression;
00454 s->block_width = compression_types[header.compression].block_width;
00455 s->block_height = compression_types[header.compression].block_height;
00456 s->block_type = compression_types[header.compression].block_type;
00457
00458 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
00459 av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
00460 s->last_deltaset, s->last_vectable, s->compression, s->block_width,
00461 s->block_height, s->block_type,
00462 s->flags & FLAG_KEYFRAME ? " KEY" : "",
00463 s->flags & FLAG_INTERFRAME ? " INTER" : "",
00464 s->flags & FLAG_SPRITE ? " SPRITE" : "",
00465 s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
00466
00467 return header.header_size;
00468 }
00469
00470 static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
00471 {
00472 TrueMotion1Context *s = avctx->priv_data;
00473
00474 s->avctx = avctx;
00475
00476
00477
00478
00479
00480
00481
00482 s->frame.data[0] = NULL;
00483
00484
00485
00486 av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
00487
00488 return 0;
00489 }
00490
00491
00492
00493
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00496
00497
00498
00499
00500
00501
00502
00503
00504
00505
00506
00507
00508
00509
00510
00511
00512
00513
00514
00515
00516
00517 #define GET_NEXT_INDEX() \
00518 {\
00519 if (index_stream_index >= s->index_stream_size) { \
00520 av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
00521 return; \
00522 } \
00523 index = s->index_stream[index_stream_index++] * 4; \
00524 }
00525
00526 #define APPLY_C_PREDICTOR() \
00527 predictor_pair = s->c_predictor_table[index]; \
00528 horiz_pred += (predictor_pair >> 1); \
00529 if (predictor_pair & 1) { \
00530 GET_NEXT_INDEX() \
00531 if (!index) { \
00532 GET_NEXT_INDEX() \
00533 predictor_pair = s->c_predictor_table[index]; \
00534 horiz_pred += ((predictor_pair >> 1) * 5); \
00535 if (predictor_pair & 1) \
00536 GET_NEXT_INDEX() \
00537 else \
00538 index++; \
00539 } \
00540 } else \
00541 index++;
00542
00543 #define APPLY_C_PREDICTOR_24() \
00544 predictor_pair = s->c_predictor_table[index]; \
00545 horiz_pred += (predictor_pair >> 1); \
00546 if (predictor_pair & 1) { \
00547 GET_NEXT_INDEX() \
00548 if (!index) { \
00549 GET_NEXT_INDEX() \
00550 predictor_pair = s->fat_c_predictor_table[index]; \
00551 horiz_pred += (predictor_pair >> 1); \
00552 if (predictor_pair & 1) \
00553 GET_NEXT_INDEX() \
00554 else \
00555 index++; \
00556 } \
00557 } else \
00558 index++;
00559
00560
00561 #define APPLY_Y_PREDICTOR() \
00562 predictor_pair = s->y_predictor_table[index]; \
00563 horiz_pred += (predictor_pair >> 1); \
00564 if (predictor_pair & 1) { \
00565 GET_NEXT_INDEX() \
00566 if (!index) { \
00567 GET_NEXT_INDEX() \
00568 predictor_pair = s->y_predictor_table[index]; \
00569 horiz_pred += ((predictor_pair >> 1) * 5); \
00570 if (predictor_pair & 1) \
00571 GET_NEXT_INDEX() \
00572 else \
00573 index++; \
00574 } \
00575 } else \
00576 index++;
00577
00578 #define APPLY_Y_PREDICTOR_24() \
00579 predictor_pair = s->y_predictor_table[index]; \
00580 horiz_pred += (predictor_pair >> 1); \
00581 if (predictor_pair & 1) { \
00582 GET_NEXT_INDEX() \
00583 if (!index) { \
00584 GET_NEXT_INDEX() \
00585 predictor_pair = s->fat_y_predictor_table[index]; \
00586 horiz_pred += (predictor_pair >> 1); \
00587 if (predictor_pair & 1) \
00588 GET_NEXT_INDEX() \
00589 else \
00590 index++; \
00591 } \
00592 } else \
00593 index++;
00594
00595 #define OUTPUT_PIXEL_PAIR() \
00596 *current_pixel_pair = *vert_pred + horiz_pred; \
00597 *vert_pred++ = *current_pixel_pair++;
00598
00599 static void truemotion1_decode_16bit(TrueMotion1Context *s)
00600 {
00601 int y;
00602 int pixels_left;
00603 unsigned int predictor_pair;
00604 unsigned int horiz_pred;
00605 unsigned int *vert_pred;
00606 unsigned int *current_pixel_pair;
00607 unsigned char *current_line = s->frame.data[0];
00608 int keyframe = s->flags & FLAG_KEYFRAME;
00609
00610
00611 const unsigned char *mb_change_bits = s->mb_change_bits;
00612 unsigned char mb_change_byte;
00613 unsigned char mb_change_byte_mask;
00614 int mb_change_index;
00615
00616
00617 int index_stream_index = 0;
00618 int index;
00619
00620
00621 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
00622
00623 GET_NEXT_INDEX();
00624
00625 for (y = 0; y < s->avctx->height; y++) {
00626
00627
00628 horiz_pred = 0;
00629 current_pixel_pair = (unsigned int *)current_line;
00630 vert_pred = s->vert_pred;
00631 mb_change_index = 0;
00632 mb_change_byte = mb_change_bits[mb_change_index++];
00633 mb_change_byte_mask = 0x01;
00634 pixels_left = s->avctx->width;
00635
00636 while (pixels_left > 0) {
00637
00638 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
00639
00640 switch (y & 3) {
00641 case 0:
00642
00643
00644 if (s->block_width == 2) {
00645 APPLY_C_PREDICTOR();
00646 APPLY_Y_PREDICTOR();
00647 OUTPUT_PIXEL_PAIR();
00648 APPLY_C_PREDICTOR();
00649 APPLY_Y_PREDICTOR();
00650 OUTPUT_PIXEL_PAIR();
00651 } else {
00652 APPLY_C_PREDICTOR();
00653 APPLY_Y_PREDICTOR();
00654 OUTPUT_PIXEL_PAIR();
00655 APPLY_Y_PREDICTOR();
00656 OUTPUT_PIXEL_PAIR();
00657 }
00658 break;
00659
00660 case 1:
00661 case 3:
00662
00663 APPLY_Y_PREDICTOR();
00664 OUTPUT_PIXEL_PAIR();
00665 APPLY_Y_PREDICTOR();
00666 OUTPUT_PIXEL_PAIR();
00667 break;
00668
00669 case 2:
00670
00671
00672 if (s->block_type == BLOCK_2x2) {
00673 APPLY_C_PREDICTOR();
00674 APPLY_Y_PREDICTOR();
00675 OUTPUT_PIXEL_PAIR();
00676 APPLY_C_PREDICTOR();
00677 APPLY_Y_PREDICTOR();
00678 OUTPUT_PIXEL_PAIR();
00679 } else if (s->block_type == BLOCK_4x2) {
00680 APPLY_C_PREDICTOR();
00681 APPLY_Y_PREDICTOR();
00682 OUTPUT_PIXEL_PAIR();
00683 APPLY_Y_PREDICTOR();
00684 OUTPUT_PIXEL_PAIR();
00685 } else {
00686 APPLY_Y_PREDICTOR();
00687 OUTPUT_PIXEL_PAIR();
00688 APPLY_Y_PREDICTOR();
00689 OUTPUT_PIXEL_PAIR();
00690 }
00691 break;
00692 }
00693
00694 } else {
00695
00696
00697
00698 *vert_pred++ = *current_pixel_pair++;
00699 horiz_pred = *current_pixel_pair - *vert_pred;
00700 *vert_pred++ = *current_pixel_pair++;
00701
00702 }
00703
00704 if (!keyframe) {
00705 mb_change_byte_mask <<= 1;
00706
00707
00708 if (!mb_change_byte_mask) {
00709 mb_change_byte = mb_change_bits[mb_change_index++];
00710 mb_change_byte_mask = 0x01;
00711 }
00712 }
00713
00714 pixels_left -= 4;
00715 }
00716
00717
00718 if (((y + 1) & 3) == 0)
00719 mb_change_bits += s->mb_change_bits_row_size;
00720
00721 current_line += s->frame.linesize[0];
00722 }
00723 }
00724
00725 static void truemotion1_decode_24bit(TrueMotion1Context *s)
00726 {
00727 int y;
00728 int pixels_left;
00729 unsigned int predictor_pair;
00730 unsigned int horiz_pred;
00731 unsigned int *vert_pred;
00732 unsigned int *current_pixel_pair;
00733 unsigned char *current_line = s->frame.data[0];
00734 int keyframe = s->flags & FLAG_KEYFRAME;
00735
00736
00737 const unsigned char *mb_change_bits = s->mb_change_bits;
00738 unsigned char mb_change_byte;
00739 unsigned char mb_change_byte_mask;
00740 int mb_change_index;
00741
00742
00743 int index_stream_index = 0;
00744 int index;
00745
00746
00747 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
00748
00749 GET_NEXT_INDEX();
00750
00751 for (y = 0; y < s->avctx->height; y++) {
00752
00753
00754 horiz_pred = 0;
00755 current_pixel_pair = (unsigned int *)current_line;
00756 vert_pred = s->vert_pred;
00757 mb_change_index = 0;
00758 mb_change_byte = mb_change_bits[mb_change_index++];
00759 mb_change_byte_mask = 0x01;
00760 pixels_left = s->avctx->width;
00761
00762 while (pixels_left > 0) {
00763
00764 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
00765
00766 switch (y & 3) {
00767 case 0:
00768
00769
00770 if (s->block_width == 2) {
00771 APPLY_C_PREDICTOR_24();
00772 APPLY_Y_PREDICTOR_24();
00773 OUTPUT_PIXEL_PAIR();
00774 APPLY_C_PREDICTOR_24();
00775 APPLY_Y_PREDICTOR_24();
00776 OUTPUT_PIXEL_PAIR();
00777 } else {
00778 APPLY_C_PREDICTOR_24();
00779 APPLY_Y_PREDICTOR_24();
00780 OUTPUT_PIXEL_PAIR();
00781 APPLY_Y_PREDICTOR_24();
00782 OUTPUT_PIXEL_PAIR();
00783 }
00784 break;
00785
00786 case 1:
00787 case 3:
00788
00789 APPLY_Y_PREDICTOR_24();
00790 OUTPUT_PIXEL_PAIR();
00791 APPLY_Y_PREDICTOR_24();
00792 OUTPUT_PIXEL_PAIR();
00793 break;
00794
00795 case 2:
00796
00797
00798 if (s->block_type == BLOCK_2x2) {
00799 APPLY_C_PREDICTOR_24();
00800 APPLY_Y_PREDICTOR_24();
00801 OUTPUT_PIXEL_PAIR();
00802 APPLY_C_PREDICTOR_24();
00803 APPLY_Y_PREDICTOR_24();
00804 OUTPUT_PIXEL_PAIR();
00805 } else if (s->block_type == BLOCK_4x2) {
00806 APPLY_C_PREDICTOR_24();
00807 APPLY_Y_PREDICTOR_24();
00808 OUTPUT_PIXEL_PAIR();
00809 APPLY_Y_PREDICTOR_24();
00810 OUTPUT_PIXEL_PAIR();
00811 } else {
00812 APPLY_Y_PREDICTOR_24();
00813 OUTPUT_PIXEL_PAIR();
00814 APPLY_Y_PREDICTOR_24();
00815 OUTPUT_PIXEL_PAIR();
00816 }
00817 break;
00818 }
00819
00820 } else {
00821
00822
00823
00824 *vert_pred++ = *current_pixel_pair++;
00825 horiz_pred = *current_pixel_pair - *vert_pred;
00826 *vert_pred++ = *current_pixel_pair++;
00827
00828 }
00829
00830 if (!keyframe) {
00831 mb_change_byte_mask <<= 1;
00832
00833
00834 if (!mb_change_byte_mask) {
00835 mb_change_byte = mb_change_bits[mb_change_index++];
00836 mb_change_byte_mask = 0x01;
00837 }
00838 }
00839
00840 pixels_left -= 2;
00841 }
00842
00843
00844 if (((y + 1) & 3) == 0)
00845 mb_change_bits += s->mb_change_bits_row_size;
00846
00847 current_line += s->frame.linesize[0];
00848 }
00849 }
00850
00851
00852 static int truemotion1_decode_frame(AVCodecContext *avctx,
00853 void *data, int *data_size,
00854 AVPacket *avpkt)
00855 {
00856 const uint8_t *buf = avpkt->data;
00857 int buf_size = avpkt->size;
00858 TrueMotion1Context *s = avctx->priv_data;
00859
00860 s->buf = buf;
00861 s->size = buf_size;
00862
00863 if (truemotion1_decode_header(s) == -1)
00864 return -1;
00865
00866 s->frame.reference = 1;
00867 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
00868 FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
00869 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
00870 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00871 return -1;
00872 }
00873
00874 if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
00875 truemotion1_decode_24bit(s);
00876 } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
00877 truemotion1_decode_16bit(s);
00878 }
00879
00880 *data_size = sizeof(AVFrame);
00881 *(AVFrame*)data = s->frame;
00882
00883
00884 return buf_size;
00885 }
00886
00887 static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
00888 {
00889 TrueMotion1Context *s = avctx->priv_data;
00890
00891 if (s->frame.data[0])
00892 avctx->release_buffer(avctx, &s->frame);
00893
00894 av_free(s->vert_pred);
00895
00896 return 0;
00897 }
00898
00899 AVCodec ff_truemotion1_decoder = {
00900 .name = "truemotion1",
00901 .type = AVMEDIA_TYPE_VIDEO,
00902 .id = CODEC_ID_TRUEMOTION1,
00903 .priv_data_size = sizeof(TrueMotion1Context),
00904 .init = truemotion1_decode_init,
00905 .close = truemotion1_decode_end,
00906 .decode = truemotion1_decode_frame,
00907 .capabilities = CODEC_CAP_DR1,
00908 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
00909 };