2 * Duck TrueMotion 1.0 Decoder
3 * Copyright (C) 2003 Alex Beregszaszi & Mike Melanson
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Duck TrueMotion v1 Video Decoder by
25 * Alex Beregszaszi and
26 * Mike Melanson (melanson@pcisys.net)
28 * The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and
29 * outputs RGB555 (or RGB565) data. 24-bit TM1 data is not supported yet.
40 #include "truemotion1data.h"
42 typedef struct TrueMotion1Context {
43 AVCodecContext *avctx;
50 uint8_t *mb_change_bits;
51 int mb_change_bits_row_size;
52 uint8_t *index_stream;
53 int index_stream_size;
58 uint32_t y_predictor_table[1024];
59 uint32_t c_predictor_table[1024];
60 uint32_t fat_y_predictor_table[1024];
61 uint32_t fat_c_predictor_table[1024];
73 int last_deltaset, last_vectable;
75 unsigned int *vert_pred;
79 #define FLAG_SPRITE 32
80 #define FLAG_KEYFRAME 16
81 #define FLAG_INTERFRAME 8
82 #define FLAG_INTERPOLATED 4
103 #define ALGO_RGB16V 1
104 #define ALGO_RGB16H 2
105 #define ALGO_RGB24H 3
107 /* these are the various block sizes that can occupy a 4x4 block */
113 typedef struct comp_types {
115 int block_width; // vres
116 int block_height; // hres
120 /* { valid for metatype }, algorithm, num of deltas, vert res, horiz res */
121 static comp_types compression_types[17] = {
122 { ALGO_NOP, 0, 0, 0 },
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 },
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 },
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 },
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 }
145 static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
149 if (delta_table_index > 3)
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));
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++)
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) */
168 #ifdef WORDS_BIGENDIAN
169 static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
171 static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
177 lo += (lo << 5) + (lo << 10);
179 hi += (hi << 5) + (hi << 10);
180 return ((lo + (hi << 16)) << 1);
183 #ifdef WORDS_BIGENDIAN
184 static int make_cdt15_entry(int p2, int p1, int16_t *cdt)
186 static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
194 return ((lo + (lo << 16)) << 1);
197 #ifdef WORDS_BIGENDIAN
198 static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
200 static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
206 lo += (lo << 6) + (lo << 11);
208 hi += (hi << 6) + (hi << 11);
209 return ((lo + (hi << 16)) << 1);
212 #ifdef WORDS_BIGENDIAN
213 static int make_cdt16_entry(int p2, int p1, int16_t *cdt)
215 static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
223 return ((lo + (lo << 16)) << 1);
226 #ifdef WORDS_BIGENDIAN
227 static int make_ydt24_entry(int p2, int p1, int16_t *ydt)
229 static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
236 return ((lo + (hi << 8) + (hi << 16)) << 1);
239 #ifdef WORDS_BIGENDIAN
240 static int make_cdt24_entry(int p2, int p1, int16_t *cdt)
242 static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
252 static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
255 unsigned char delta_pair;
257 for (i = 0; i < 1024; i += 4)
259 len = *sel_vector_table++ / 2;
260 for (j = 0; j < len; j++)
262 delta_pair = *sel_vector_table++;
263 s->y_predictor_table[i+j] = 0xfffffffe &
264 make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
265 s->c_predictor_table[i+j] = 0xfffffffe &
266 make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
268 s->y_predictor_table[i+(j-1)] |= 1;
269 s->c_predictor_table[i+(j-1)] |= 1;
273 static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
276 unsigned char delta_pair;
278 for (i = 0; i < 1024; i += 4)
280 len = *sel_vector_table++ / 2;
281 for (j = 0; j < len; j++)
283 delta_pair = *sel_vector_table++;
284 s->y_predictor_table[i+j] = 0xfffffffe &
285 make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
286 s->c_predictor_table[i+j] = 0xfffffffe &
287 make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
289 s->y_predictor_table[i+(j-1)] |= 1;
290 s->c_predictor_table[i+(j-1)] |= 1;
294 static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
297 unsigned char delta_pair;
299 for (i = 0; i < 1024; i += 4)
301 len = *sel_vector_table++ / 2;
302 for (j = 0; j < len; j++)
304 delta_pair = *sel_vector_table++;
305 s->y_predictor_table[i+j] = 0xfffffffe &
306 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
307 s->c_predictor_table[i+j] = 0xfffffffe &
308 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
309 s->fat_y_predictor_table[i+j] = 0xfffffffe &
310 make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
311 s->fat_c_predictor_table[i+j] = 0xfffffffe &
312 make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
314 s->y_predictor_table[i+(j-1)] |= 1;
315 s->c_predictor_table[i+(j-1)] |= 1;
316 s->fat_y_predictor_table[i+(j-1)] |= 1;
317 s->fat_c_predictor_table[i+(j-1)] |= 1;
321 /* Returns the number of bytes consumed from the bytestream. Returns -1 if
322 * there was an error while decoding the header */
323 static int truemotion1_decode_header(TrueMotion1Context *s)
326 struct frame_header header;
327 uint8_t header_buffer[128]; /* logical maximum size of the header */
328 const uint8_t *sel_vector_table;
330 /* There is 1 change bit per 4 pixels, so each change byte represents
331 * 32 pixels; divide width by 4 to obtain the number of change bits and
332 * then round up to the nearest byte. */
333 s->mb_change_bits_row_size = ((s->avctx->width >> 2) + 7) >> 3;
335 header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
336 if (s->buf[0] < 0x10)
338 av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
342 /* unscramble the header bytes with a XOR operation */
343 memset(header_buffer, 0, 128);
344 for (i = 1; i < header.header_size; i++)
345 header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
347 header.compression = header_buffer[0];
348 header.deltaset = header_buffer[1];
349 header.vectable = header_buffer[2];
350 header.ysize = AV_RL16(&header_buffer[3]);
351 header.xsize = AV_RL16(&header_buffer[5]);
352 header.checksum = AV_RL16(&header_buffer[7]);
353 header.version = header_buffer[9];
354 header.header_type = header_buffer[10];
355 header.flags = header_buffer[11];
356 header.control = header_buffer[12];
359 if (header.version >= 2)
361 if (header.header_type > 3)
363 av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
365 } else if ((header.header_type == 2) || (header.header_type == 3)) {
366 s->flags = header.flags;
367 if (!(s->flags & FLAG_INTERFRAME))
368 s->flags |= FLAG_KEYFRAME;
370 s->flags = FLAG_KEYFRAME;
371 } else /* Version 1 */
372 s->flags = FLAG_KEYFRAME;
374 if (s->flags & FLAG_SPRITE) {
375 av_log(s->avctx, AV_LOG_INFO, "SPRITE frame found, please report the sample to the developers\n");
376 /* FIXME header.width, height, xoffset and yoffset aren't initialized */
379 s->h = header.height;
380 s->x = header.xoffset;
381 s->y = header.yoffset;
388 if (header.header_type < 2) {
389 if ((s->w < 213) && (s->h >= 176))
391 s->flags |= FLAG_INTERPOLATED;
392 av_log(s->avctx, AV_LOG_INFO, "INTERPOLATION selected, please report the sample to the developers\n");
397 if (header.compression > 17) {
398 av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
402 if ((header.deltaset != s->last_deltaset) ||
403 (header.vectable != s->last_vectable))
404 select_delta_tables(s, header.deltaset);
406 if ((header.compression & 1) && header.header_type)
407 sel_vector_table = pc_tbl2;
409 if (header.vectable < 4)
410 sel_vector_table = tables[header.vectable - 1];
412 av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
417 // FIXME: where to place this ?!?!
418 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
419 s->avctx->pix_fmt = PIX_FMT_RGB32;
421 s->avctx->pix_fmt = PIX_FMT_RGB555; // RGB565 is supported as well
423 if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
425 if (compression_types[header.compression].algorithm == ALGO_RGB24H)
426 gen_vector_table24(s, sel_vector_table);
428 if (s->avctx->pix_fmt == PIX_FMT_RGB555)
429 gen_vector_table15(s, sel_vector_table);
431 gen_vector_table16(s, sel_vector_table);
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;
440 /* one change bit per 4x4 block */
441 s->index_stream = s->mb_change_bits +
442 (s->mb_change_bits_row_size * (s->avctx->height >> 2));
444 s->index_stream_size = s->size - (s->index_stream - s->buf);
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;
453 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
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" : "");
462 return header.header_size;
465 static int truemotion1_decode_init(AVCodecContext *avctx)
467 TrueMotion1Context *s = avctx->priv_data;
471 // FIXME: it may change ?
472 // if (avctx->bits_per_sample == 24)
473 // avctx->pix_fmt = PIX_FMT_RGB24;
475 // avctx->pix_fmt = PIX_FMT_RGB555;
477 s->frame.data[0] = s->prev_frame.data[0] = NULL;
479 /* there is a vertical predictor for each pixel in a line; each vertical
480 * predictor is 0 to start with */
482 (unsigned int *)av_malloc(s->avctx->width * sizeof(unsigned int));
488 Block decoding order:
494 hres,vres,i,i%vres (0 < i < 4)
513 #define GET_NEXT_INDEX() \
515 if (index_stream_index >= s->index_stream_size) { \
516 av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
519 index = s->index_stream[index_stream_index++] * 4; \
522 #define APPLY_C_PREDICTOR() \
523 predictor_pair = s->c_predictor_table[index]; \
524 horiz_pred += (predictor_pair >> 1); \
525 if (predictor_pair & 1) { \
529 predictor_pair = s->c_predictor_table[index]; \
530 horiz_pred += ((predictor_pair >> 1) * 5); \
531 if (predictor_pair & 1) \
539 #define APPLY_C_PREDICTOR_24() \
540 predictor_pair = s->c_predictor_table[index]; \
541 horiz_pred += (predictor_pair >> 1); \
542 if (predictor_pair & 1) { \
546 predictor_pair = s->fat_c_predictor_table[index]; \
547 horiz_pred += (predictor_pair >> 1); \
548 if (predictor_pair & 1) \
557 #define APPLY_Y_PREDICTOR() \
558 predictor_pair = s->y_predictor_table[index]; \
559 horiz_pred += (predictor_pair >> 1); \
560 if (predictor_pair & 1) { \
564 predictor_pair = s->y_predictor_table[index]; \
565 horiz_pred += ((predictor_pair >> 1) * 5); \
566 if (predictor_pair & 1) \
574 #define APPLY_Y_PREDICTOR_24() \
575 predictor_pair = s->y_predictor_table[index]; \
576 horiz_pred += (predictor_pair >> 1); \
577 if (predictor_pair & 1) { \
581 predictor_pair = s->fat_y_predictor_table[index]; \
582 horiz_pred += (predictor_pair >> 1); \
583 if (predictor_pair & 1) \
591 #define OUTPUT_PIXEL_PAIR() \
592 *current_pixel_pair = *vert_pred + horiz_pred; \
593 *vert_pred++ = *current_pixel_pair++; \
596 static void truemotion1_decode_16bit(TrueMotion1Context *s)
599 int pixels_left; /* remaining pixels on this line */
600 unsigned int predictor_pair;
601 unsigned int horiz_pred;
602 unsigned int *vert_pred;
603 unsigned int *current_pixel_pair;
604 unsigned int *prev_pixel_pair;
605 unsigned char *current_line = s->frame.data[0];
606 unsigned char *prev_line = s->prev_frame.data[0];
607 int keyframe = s->flags & FLAG_KEYFRAME;
609 /* these variables are for managing the stream of macroblock change bits */
610 unsigned char *mb_change_bits = s->mb_change_bits;
611 unsigned char mb_change_byte;
612 unsigned char mb_change_byte_mask;
615 /* these variables are for managing the main index stream */
616 int index_stream_index = 0; /* yes, the index into the index stream */
619 /* clean out the line buffer */
620 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
624 for (y = 0; y < s->avctx->height; y++) {
626 /* re-init variables for the next line iteration */
628 current_pixel_pair = (unsigned int *)current_line;
629 prev_pixel_pair = (unsigned int *)prev_line;
630 vert_pred = s->vert_pred;
632 mb_change_byte = mb_change_bits[mb_change_index++];
633 mb_change_byte_mask = 0x01;
634 pixels_left = s->avctx->width;
636 while (pixels_left > 0) {
638 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
642 /* if macroblock width is 2, apply C-Y-C-Y; else
644 if (s->block_width == 2) {
662 /* always apply 2 Y predictors on these iterations */
670 /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
671 * depending on the macroblock type */
672 if (s->block_type == BLOCK_2x2) {
679 } else if (s->block_type == BLOCK_4x2) {
696 /* skip (copy) four pixels, but reassign the horizontal
698 *current_pixel_pair = *prev_pixel_pair++;
699 *vert_pred++ = *current_pixel_pair++;
700 *current_pixel_pair = *prev_pixel_pair++;
701 horiz_pred = *current_pixel_pair - *vert_pred;
702 *vert_pred++ = *current_pixel_pair++;
707 mb_change_byte_mask <<= 1;
710 if (!mb_change_byte_mask) {
711 mb_change_byte = mb_change_bits[mb_change_index++];
712 mb_change_byte_mask = 0x01;
719 /* next change row */
720 if (((y + 1) & 3) == 0)
721 mb_change_bits += s->mb_change_bits_row_size;
723 current_line += s->frame.linesize[0];
724 prev_line += s->prev_frame.linesize[0];
728 static void truemotion1_decode_24bit(TrueMotion1Context *s)
731 int pixels_left; /* remaining pixels on this line */
732 unsigned int predictor_pair;
733 unsigned int horiz_pred;
734 unsigned int *vert_pred;
735 unsigned int *current_pixel_pair;
736 unsigned int *prev_pixel_pair;
737 unsigned char *current_line = s->frame.data[0];
738 unsigned char *prev_line = s->prev_frame.data[0];
739 int keyframe = s->flags & FLAG_KEYFRAME;
741 /* these variables are for managing the stream of macroblock change bits */
742 unsigned char *mb_change_bits = s->mb_change_bits;
743 unsigned char mb_change_byte;
744 unsigned char mb_change_byte_mask;
747 /* these variables are for managing the main index stream */
748 int index_stream_index = 0; /* yes, the index into the index stream */
751 /* clean out the line buffer */
752 memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
756 for (y = 0; y < s->avctx->height; y++) {
758 /* re-init variables for the next line iteration */
760 current_pixel_pair = (unsigned int *)current_line;
761 prev_pixel_pair = (unsigned int *)prev_line;
762 vert_pred = s->vert_pred;
764 mb_change_byte = mb_change_bits[mb_change_index++];
765 mb_change_byte_mask = 0x01;
766 pixels_left = s->avctx->width;
768 while (pixels_left > 0) {
770 if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
774 /* if macroblock width is 2, apply C-Y-C-Y; else
776 if (s->block_width == 2) {
777 APPLY_C_PREDICTOR_24();
778 APPLY_Y_PREDICTOR_24();
780 APPLY_C_PREDICTOR_24();
781 APPLY_Y_PREDICTOR_24();
784 APPLY_C_PREDICTOR_24();
785 APPLY_Y_PREDICTOR_24();
787 APPLY_Y_PREDICTOR_24();
794 /* always apply 2 Y predictors on these iterations */
795 APPLY_Y_PREDICTOR_24();
797 APPLY_Y_PREDICTOR_24();
802 /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
803 * depending on the macroblock type */
804 if (s->block_type == BLOCK_2x2) {
805 APPLY_C_PREDICTOR_24();
806 APPLY_Y_PREDICTOR_24();
808 APPLY_C_PREDICTOR_24();
809 APPLY_Y_PREDICTOR_24();
811 } else if (s->block_type == BLOCK_4x2) {
812 APPLY_C_PREDICTOR_24();
813 APPLY_Y_PREDICTOR_24();
815 APPLY_Y_PREDICTOR_24();
818 APPLY_Y_PREDICTOR_24();
820 APPLY_Y_PREDICTOR_24();
828 /* skip (copy) four pixels, but reassign the horizontal
830 *current_pixel_pair = *prev_pixel_pair++;
831 *vert_pred++ = *current_pixel_pair++;
832 *current_pixel_pair = *prev_pixel_pair++;
833 horiz_pred = *current_pixel_pair - *vert_pred;
834 *vert_pred++ = *current_pixel_pair++;
839 mb_change_byte_mask <<= 1;
842 if (!mb_change_byte_mask) {
843 mb_change_byte = mb_change_bits[mb_change_index++];
844 mb_change_byte_mask = 0x01;
851 /* next change row */
852 if (((y + 1) & 3) == 0)
853 mb_change_bits += s->mb_change_bits_row_size;
855 current_line += s->frame.linesize[0];
856 prev_line += s->prev_frame.linesize[0];
861 static int truemotion1_decode_frame(AVCodecContext *avctx,
862 void *data, int *data_size,
863 uint8_t *buf, int buf_size)
865 TrueMotion1Context *s = avctx->priv_data;
870 if (truemotion1_decode_header(s) == -1)
873 s->frame.reference = 1;
874 if (avctx->get_buffer(avctx, &s->frame) < 0) {
875 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
879 /* check for a do-nothing frame and copy the previous frame */
880 if (compression_types[s->compression].algorithm == ALGO_NOP)
882 memcpy(s->frame.data[0], s->prev_frame.data[0],
883 s->frame.linesize[0] * s->avctx->height);
884 } else if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
885 truemotion1_decode_24bit(s);
887 truemotion1_decode_16bit(s);
890 if (s->prev_frame.data[0])
891 avctx->release_buffer(avctx, &s->prev_frame);
894 s->prev_frame = s->frame;
896 *data_size = sizeof(AVFrame);
897 *(AVFrame*)data = s->frame;
899 /* report that the buffer was completely consumed */
903 static int truemotion1_decode_end(AVCodecContext *avctx)
905 TrueMotion1Context *s = avctx->priv_data;
907 /* release the last frame */
908 if (s->prev_frame.data[0])
909 avctx->release_buffer(avctx, &s->prev_frame);
911 av_free(s->vert_pred);
916 AVCodec truemotion1_decoder = {
919 CODEC_ID_TRUEMOTION1,
920 sizeof(TrueMotion1Context),
921 truemotion1_decode_init,
923 truemotion1_decode_end,
924 truemotion1_decode_frame,