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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
00324 memset(header_buffer, 0, 128);
00325 for (i = 1; i < header.header_size; i++)
00326 header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
00327
00328 header.compression = header_buffer[0];
00329 header.deltaset = header_buffer[1];
00330 header.vectable = header_buffer[2];
00331 header.ysize = AV_RL16(&header_buffer[3]);
00332 header.xsize = AV_RL16(&header_buffer[5]);
00333 header.checksum = AV_RL16(&header_buffer[7]);
00334 header.version = header_buffer[9];
00335 header.header_type = header_buffer[10];
00336 header.flags = header_buffer[11];
00337 header.control = header_buffer[12];
00338
00339
00340 if (header.version >= 2)
00341 {
00342 if (header.header_type > 3)
00343 {
00344 av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
00345 return -1;
00346 } else if ((header.header_type == 2) || (header.header_type == 3)) {
00347 s->flags = header.flags;
00348 if (!(s->flags & FLAG_INTERFRAME))
00349 s->flags |= FLAG_KEYFRAME;
00350 } else
00351 s->flags = FLAG_KEYFRAME;
00352 } else
00353 s->flags = FLAG_KEYFRAME;
00354
00355 if (s->flags & FLAG_SPRITE) {
00356 av_log_ask_for_sample(s->avctx, "SPRITE frame found.\n");
00357
00358 #if 0
00359 s->w = header.width;
00360 s->h = header.height;
00361 s->x = header.xoffset;
00362 s->y = header.yoffset;
00363 #else
00364 return -1;
00365 #endif
00366 } else {
00367 s->w = header.xsize;
00368 s->h = header.ysize;
00369 if (header.header_type < 2) {
00370 if ((s->w < 213) && (s->h >= 176))
00371 {
00372 s->flags |= FLAG_INTERPOLATED;
00373 av_log_ask_for_sample(s->avctx, "INTERPOLATION selected.\n");
00374 }
00375 }
00376 }
00377
00378 if (header.compression >= 17) {
00379 av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
00380 return -1;
00381 }
00382
00383 if ((header.deltaset != s->last_deltaset) ||
00384 (header.vectable != s->last_vectable))
00385 select_delta_tables(s, header.deltaset);
00386
00387 if ((header.compression & 1) && header.header_type)
00388 sel_vector_table = pc_tbl2;
00389 else {
00390 if (header.vectable > 0 && header.vectable < 4)
00391 sel_vector_table = tables[header.vectable - 1];
00392 else {
00393 av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
00394 return -1;
00395 }
00396 }
00397
00398 if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
00399 new_pix_fmt = PIX_FMT_RGB32;
00400 width_shift = 1;
00401 } else
00402 new_pix_fmt = PIX_FMT_RGB555;
00403
00404 s->w >>= width_shift;
00405 if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
00406 return -1;
00407
00408 if (s->w != s->avctx->width || s->h != s->avctx->height ||
00409 new_pix_fmt != s->avctx->pix_fmt) {
00410 if (s->frame.data[0])
00411 s->avctx->release_buffer(s->avctx, &s->frame);
00412 s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
00413 s->avctx->pix_fmt = new_pix_fmt;
00414 avcodec_set_dimensions(s->avctx, s->w, s->h);
00415 av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
00416 }
00417
00418
00419
00420
00421 s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
00422
00423 if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
00424 {
00425 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
00426 gen_vector_table24(s, sel_vector_table);
00427 else
00428 if (s->avctx->pix_fmt == PIX_FMT_RGB555)
00429 gen_vector_table15(s, sel_vector_table);
00430 else
00431 gen_vector_table16(s, sel_vector_table);
00432 }
00433
00434
00435 s->mb_change_bits = s->buf + header.header_size;
00436 if (s->flags & FLAG_KEYFRAME) {
00437
00438 s->index_stream = s->mb_change_bits;
00439 } else {
00440
00441 s->index_stream = s->mb_change_bits +
00442 (s->mb_change_bits_row_size * (s->avctx->height >> 2));
00443 }
00444 s->index_stream_size = s->size - (s->index_stream - s->buf);
00445
00446 s->last_deltaset = header.deltaset;
00447 s->last_vectable = header.vectable;
00448 s->compression = header.compression;
00449 s->block_width = compression_types[header.compression].block_width;
00450 s->block_height = compression_types[header.compression].block_height;
00451 s->block_type = compression_types[header.compression].block_type;
00452
00453 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
00454 av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
00455 s->last_deltaset, s->last_vectable, s->compression, s->block_width,
00456 s->block_height, s->block_type,
00457 s->flags & FLAG_KEYFRAME ? " KEY" : "",
00458 s->flags & FLAG_INTERFRAME ? " INTER" : "",
00459 s->flags & FLAG_SPRITE ? " SPRITE" : "",
00460 s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
00461
00462 return header.header_size;
00463 }
00464
00465 static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
00466 {
00467 TrueMotion1Context *s = avctx->priv_data;
00468
00469 s->avctx = avctx;
00470
00471
00472
00473
00474
00475
00476
00477 s->frame.data[0] = NULL;
00478
00479
00480
00481 av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
00482
00483 return 0;
00484 }
00485
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00502
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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 -= 2;
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 AVPacket *avpkt)
00850 {
00851 const uint8_t *buf = avpkt->data;
00852 int buf_size = avpkt->size;
00853 TrueMotion1Context *s = avctx->priv_data;
00854
00855 s->buf = buf;
00856 s->size = buf_size;
00857
00858 if (truemotion1_decode_header(s) == -1)
00859 return -1;
00860
00861 s->frame.reference = 1;
00862 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
00863 FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
00864 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
00865 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00866 return -1;
00867 }
00868
00869 if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
00870 truemotion1_decode_24bit(s);
00871 } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
00872 truemotion1_decode_16bit(s);
00873 }
00874
00875 *data_size = sizeof(AVFrame);
00876 *(AVFrame*)data = s->frame;
00877
00878
00879 return buf_size;
00880 }
00881
00882 static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
00883 {
00884 TrueMotion1Context *s = avctx->priv_data;
00885
00886 if (s->frame.data[0])
00887 avctx->release_buffer(avctx, &s->frame);
00888
00889 av_free(s->vert_pred);
00890
00891 return 0;
00892 }
00893
00894 AVCodec ff_truemotion1_decoder = {
00895 .name = "truemotion1",
00896 .type = AVMEDIA_TYPE_VIDEO,
00897 .id = CODEC_ID_TRUEMOTION1,
00898 .priv_data_size = sizeof(TrueMotion1Context),
00899 .init = truemotion1_decode_init,
00900 .close = truemotion1_decode_end,
00901 .decode = truemotion1_decode_frame,
00902 .capabilities = CODEC_CAP_DR1,
00903 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
00904 };