2 * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg
3 * written, produced, and directed by Alan Smithee
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
29 #include "bytestream.h"
31 #include "indeo3data.h"
38 unsigned short y_w, y_h;
39 unsigned short uv_w, uv_h;
42 typedef struct Indeo3DecodeContext {
43 AVCodecContext *avctx;
53 uint8_t *corrector_type;
54 } Indeo3DecodeContext;
56 static const uint8_t corrector_type_0[24] = {
57 195, 159, 133, 115, 101, 93, 87, 77,
58 195, 159, 133, 115, 101, 93, 87, 77,
59 128, 79, 79, 79, 79, 79, 79, 79
62 static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };
64 static av_cold int build_modpred(Indeo3DecodeContext *s)
68 if (!(s->ModPred = av_malloc(8 * 128)))
69 return AVERROR(ENOMEM);
71 for (i=0; i < 128; ++i) {
72 s->ModPred[i+0*128] = i > 126 ? 254 : 2*(i + 1 - ((i + 1) % 2));
73 s->ModPred[i+1*128] = i == 7 ? 20 :
75 i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3));
76 s->ModPred[i+2*128] = i > 125 ? 248 : 2*(i + 2 - ((i + 2) % 4));
77 s->ModPred[i+3*128] = 2*(i + 1 - ((i - 3) % 5));
78 s->ModPred[i+4*128] = i == 8 ? 20 : 2*(i + 1 - ((i - 3) % 6));
79 s->ModPred[i+5*128] = 2*(i + 4 - ((i + 3) % 7));
80 s->ModPred[i+6*128] = i > 123 ? 240 : 2*(i + 4 - ((i + 4) % 8));
81 s->ModPred[i+7*128] = 2*(i + 5 - ((i + 4) % 9));
84 if (!(s->corrector_type = av_malloc(24 * 256)))
85 return AVERROR(ENOMEM);
87 for (i=0; i < 24; ++i) {
88 for (j=0; j < 256; ++j) {
89 s->corrector_type[i*256+j] = j < corrector_type_0[i] ? 1 :
90 j < 248 || (i == 16 && j == 248) ? 0 :
91 corrector_type_2[j - 248];
98 static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
100 int luma_width = (s->width + 3) & ~3,
101 luma_height = (s->height + 3) & ~3,
102 chroma_width = ((luma_width >> 2) + 3) & ~3,
103 chroma_height = ((luma_height >> 2) + 3) & ~3,
104 luma_pixels = luma_width * luma_height,
105 chroma_pixels = chroma_width * chroma_height,
107 unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
108 (chroma_pixels + chroma_width) * 4;
110 if(!(s->buf = av_malloc(bufsize)))
111 return AVERROR(ENOMEM);
112 s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
113 s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height;
114 s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width;
115 s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height;
117 s->iv_frame[0].Ybuf = s->buf + luma_width;
118 i = luma_pixels + luma_width * 2;
119 s->iv_frame[1].Ybuf = s->buf + i;
120 i += (luma_pixels + luma_width);
121 s->iv_frame[0].Ubuf = s->buf + i;
122 i += (chroma_pixels + chroma_width);
123 s->iv_frame[1].Ubuf = s->buf + i;
124 i += (chroma_pixels + chroma_width);
125 s->iv_frame[0].Vbuf = s->buf + i;
126 i += (chroma_pixels + chroma_width);
127 s->iv_frame[1].Vbuf = s->buf + i;
129 for(i = 1; i <= luma_width; i++)
130 s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] =
131 s->iv_frame[0].Ubuf[-i] = 0x80;
133 for(i = 1; i <= chroma_width; i++) {
134 s->iv_frame[1].Ubuf[-i] = 0x80;
135 s->iv_frame[0].Vbuf[-i] = 0x80;
136 s->iv_frame[1].Vbuf[-i] = 0x80;
137 s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80;
143 static av_cold void iv_free_func(Indeo3DecodeContext *s)
147 av_free(s->corrector_type);
156 long split_direction;
161 #define LV1_CHECK(buf1,rle_v3,lv1,lp2) \
162 if((lv1 & 0x80) != 0) { \
173 #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) \
186 #define LP2_CHECK(buf1,rle_v3,lp2) \
187 if(lp2 == 0 && rle_v3 != 0) \
195 #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \
203 static void iv_Decode_Chunk(Indeo3DecodeContext *s,
204 uint8_t *cur, uint8_t *ref, int width, int height,
205 const uint8_t *buf1, long cb_offset, const uint8_t *hdr,
206 const uint8_t *buf2, int min_width_160)
209 unsigned long bit_pos, lv, lv1, lv2;
210 long *width_tbl, width_tbl_arr[10];
211 const signed char *ref_vectors;
212 uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;
213 uint32_t *cur_lp, *ref_lp;
214 const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];
215 uint8_t *correction_type_sp[2];
216 struct ustr strip_tbl[20], *strip;
217 int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,
218 rle_v1, rle_v2, rle_v3;
224 width_tbl = width_tbl_arr + 1;
225 i = (width < 0 ? width + 3 : width)/4;
226 for(j = -1; j < 8; j++)
227 width_tbl[j] = i * j;
231 for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);
233 strip->ypos = strip->xpos = 0;
234 for(strip->width = min_width_160; width > strip->width; strip->width *= 2);
235 strip->height = height;
236 strip->split_direction = 0;
237 strip->split_flag = 0;
242 rle_v1 = rle_v2 = rle_v3 = 0;
244 while(strip >= strip_tbl) {
251 cmd = (bit_buf >> bit_pos) & 0x03;
255 if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
256 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
259 memcpy(strip, strip-1, sizeof(*strip));
260 strip->split_flag = 1;
261 strip->split_direction = 0;
262 strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4);
264 } else if(cmd == 1) {
266 if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
267 av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
270 memcpy(strip, strip-1, sizeof(*strip));
271 strip->split_flag = 1;
272 strip->split_direction = 1;
273 strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4);
275 } else if(cmd == 2) {
276 if(strip->usl7 == 0) {
281 } else if(cmd == 3) {
282 if(strip->usl7 == 0) {
284 ref_vectors = (const signed char*)buf2 + (*buf1 * 2);
290 cur_frm_pos = cur + width * strip->ypos + strip->xpos;
292 if((blks_width = strip->width) < 0)
295 blks_height = strip->height;
297 if(ref_vectors != NULL) {
298 ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width +
299 ref_vectors[1] + strip->xpos;
301 ref_frm_pos = cur_frm_pos - width_tbl[4];
310 cmd = (bit_buf >> bit_pos) & 0x03;
312 if(cmd == 0 || ref_vectors != NULL) {
313 for(lp1 = 0; lp1 < blks_width; lp1++) {
314 for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1])
315 ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
327 if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) {
328 cp2 = s->ModPred + ((lv - 8) << 7);
330 for(i = 0; i < blks_width << 2; i++) {
336 if(k == 1 || k == 4) {
337 lv = (hdr[j] & 0xf) + cb_offset;
338 correction_type_sp[0] = s->corrector_type + (lv << 8);
339 correction_lp[0] = correction + (lv << 8);
340 lv = (hdr[j] >> 4) + cb_offset;
341 correction_lp[1] = correction + (lv << 8);
342 correction_type_sp[1] = s->corrector_type + (lv << 8);
344 correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8);
345 correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8);
346 correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8);
347 correction_lp[0] = correction_lp[1] = correction + (lv << 8);
352 case 0: /********** CASE 0 **********/
353 for( ; blks_height > 0; blks_height -= 4) {
354 for(lp1 = 0; lp1 < blks_width; lp1++) {
355 for(lp2 = 0; lp2 < 4; ) {
357 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2];
358 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2];
360 switch(correction_type_sp[0][k]) {
362 *cur_lp = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
366 res = ((le2me_16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
367 ((unsigned short *)cur_lp)[0] = le2me_16(res);
368 res = ((le2me_16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
369 ((unsigned short *)cur_lp)[1] = le2me_16(res);
375 for(i = 0, j = 0; i < 2; i++, j += width_tbl[1])
376 cur_lp[j] = ref_lp[j];
382 for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1])
383 cur_lp[j] = ref_lp[j];
389 RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
391 if(rle_v1 == 1 || ref_vectors != NULL) {
392 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
393 cur_lp[j] = ref_lp[j];
396 RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
403 LP2_CHECK(buf1,rle_v3,lp2)
405 for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1])
406 cur_lp[j] = ref_lp[j];
418 if(ref_vectors != NULL) {
419 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
420 cur_lp[j] = ref_lp[j];
427 lv = (lv1 & 0x7F) << 1;
430 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
433 LV1_CHECK(buf1,rle_v3,lv1,lp2)
444 cur_frm_pos += ((width - blks_width) * 4);
445 ref_frm_pos += ((width - blks_width) * 4);
450 case 3: /********** CASE 3 **********/
451 if(ref_vectors != NULL)
455 for( ; blks_height > 0; blks_height -= 8) {
456 for(lp1 = 0; lp1 < blks_width; lp1++) {
457 for(lp2 = 0; lp2 < 4; ) {
460 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
461 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
463 switch(correction_type_sp[lp2 & 0x01][k]) {
465 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
466 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
467 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
469 cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
474 res = ((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1;
475 ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);
476 res = ((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
477 ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);
479 if(lp2 > 0 || flag1 == 0 || strip->ypos != 0)
480 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
482 cur_lp[0] = cur_lp[width_tbl[1]];
489 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
497 for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
519 RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
522 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
523 cur_lp[j] = ref_lp[j];
526 RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
529 rle_v2 = (*buf1) - 1;
533 LP2_CHECK(buf1,rle_v3,lp2)
535 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
541 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
543 lv = (lv1 & 0x7F) << 1;
547 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
550 LV1_CHECK(buf1,rle_v3,lv1,lp2)
561 cur_frm_pos += (((width * 2) - blks_width) * 4);
566 case 10: /********** CASE 10 **********/
567 if(ref_vectors == NULL) {
570 for( ; blks_height > 0; blks_height -= 8) {
571 for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
572 for(lp2 = 0; lp2 < 4; ) {
574 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
575 ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1];
578 if(lp2 == 0 && flag1 != 0) {
579 #ifdef WORDS_BIGENDIAN
580 lv1 = lv1 & 0xFF00FF00;
581 lv1 = (lv1 >> 8) | lv1;
582 lv2 = lv2 & 0xFF00FF00;
583 lv2 = (lv2 >> 8) | lv2;
585 lv1 = lv1 & 0x00FF00FF;
586 lv1 = (lv1 << 8) | lv1;
587 lv2 = lv2 & 0x00FF00FF;
588 lv2 = (lv2 << 8) | lv2;
592 switch(correction_type_sp[lp2 & 0x01][k]) {
594 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
595 cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1);
596 if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
597 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
598 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
600 cur_lp[0] = cur_lp[width_tbl[1]];
601 cur_lp[1] = cur_lp[width_tbl[1]+1];
607 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1);
608 cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1);
609 if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) {
610 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
611 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
613 cur_lp[0] = cur_lp[width_tbl[1]];
614 cur_lp[1] = cur_lp[width_tbl[1]+1];
623 for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) {
627 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
628 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
630 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
641 if(lp2 == 0 && flag1 != 0) {
642 for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) {
646 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
647 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
649 for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
660 RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
663 for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
667 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
668 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
670 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
676 RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
680 rle_v2 = (*buf1) - 1;
683 LP2_CHECK(buf1,rle_v3,lp2)
685 if(lp2 == 0 && flag1 != 0) {
686 for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) {
690 cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE;
691 cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE;
693 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
718 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
720 lv = (lv1 & 0x7F) << 1;
723 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
725 LV1_CHECK(buf1,rle_v3,lv1,lp2)
736 cur_frm_pos += (((width * 2) - blks_width) * 4);
740 for( ; blks_height > 0; blks_height -= 8) {
741 for(lp1 = 0; lp1 < blks_width; lp1 += 2) {
742 for(lp2 = 0; lp2 < 4; ) {
744 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
745 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
747 switch(correction_type_sp[lp2 & 0x01][k]) {
749 lv1 = correctionloworder_lp[lp2 & 0x01][k];
750 lv2 = correctionhighorder_lp[lp2 & 0x01][k];
751 cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);
752 cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);
753 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
754 cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
759 lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++];
760 lv2 = correctionloworder_lp[lp2 & 0x01][k];
761 cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1);
762 cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1);
763 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1);
764 cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1);
770 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) {
771 cur_lp[j] = ref_lp[j];
772 cur_lp[j+1] = ref_lp[j+1];
780 for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) {
781 cur_lp[j] = ref_lp[j];
782 cur_lp[j+1] = ref_lp[j+1];
790 RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
791 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) {
792 ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j];
793 ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1];
795 RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
799 rle_v2 = (*buf1) - 1;
803 LP2_CHECK(buf1,rle_v3,lp2)
806 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) {
807 cur_lp[j] = ref_lp[j];
808 cur_lp[j+1] = ref_lp[j+1];
814 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
816 lv = (lv1 & 0x7F) << 1;
819 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
820 ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv;
821 LV1_CHECK(buf1,rle_v3,lv1,lp2)
833 cur_frm_pos += (((width * 2) - blks_width) * 4);
834 ref_frm_pos += (((width * 2) - blks_width) * 4);
839 case 11: /********** CASE 11 **********/
840 if(ref_vectors == NULL)
843 for( ; blks_height > 0; blks_height -= 8) {
844 for(lp1 = 0; lp1 < blks_width; lp1++) {
845 for(lp2 = 0; lp2 < 4; ) {
847 cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2];
848 ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2];
850 switch(correction_type_sp[lp2 & 0x01][k]) {
852 cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
853 cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1);
858 lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]);
859 lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]);
860 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1);
861 ((unsigned short *)cur_lp)[0] = le2me_16(res);
862 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1);
863 ((unsigned short *)cur_lp)[1] = le2me_16(res);
864 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1);
865 ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res);
866 res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1);
867 ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res);
873 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
874 cur_lp[j] = ref_lp[j];
881 for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1])
882 cur_lp[j] = ref_lp[j];
889 RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3)
891 for(i = 0, j = 0; i < 8; i++, j += width_tbl[1])
892 cur_lp[j] = ref_lp[j];
894 RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2)
898 rle_v2 = (*buf1) - 1;
902 LP2_CHECK(buf1,rle_v3,lp2)
905 for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1])
906 cur_lp[j] = ref_lp[j];
911 av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n");
913 lv = (lv1 & 0x7F) << 1;
916 for(i = 0, j = 0; i < 4; i++, j += width_tbl[1])
918 LV1_CHECK(buf1,rle_v3,lv1,lp2)
930 cur_frm_pos += (((width * 2) - blks_width) * 4);
931 ref_frm_pos += (((width * 2) - blks_width) * 4);
940 for( ; strip >= strip_tbl; strip--) {
941 if(strip->split_flag != 0) {
942 strip->split_flag = 0;
943 strip->usl7 = (strip-1)->usl7;
945 if(strip->split_direction) {
946 strip->xpos += strip->width;
947 strip->width = (strip-1)->width - strip->width;
948 if(region_160_width <= strip->xpos && width < strip->width + strip->xpos)
949 strip->width = width - strip->xpos;
951 strip->ypos += strip->height;
952 strip->height = (strip-1)->height - strip->height;
960 static av_cold int indeo3_decode_init(AVCodecContext *avctx)
962 Indeo3DecodeContext *s = avctx->priv_data;
966 s->width = avctx->width;
967 s->height = avctx->height;
968 avctx->pix_fmt = PIX_FMT_YUV410P;
970 if (!(ret = build_modpred(s)))
971 ret = iv_alloc_frames(s);
978 static int iv_decode_frame(Indeo3DecodeContext *s,
979 const uint8_t *buf, int buf_size)
981 unsigned int image_width, image_height,
982 chroma_width, chroma_height;
983 unsigned long flags, cb_offset, data_size,
984 y_offset, v_offset, u_offset, mc_vector_count;
985 const uint8_t *hdr_pos, *buf_pos;
988 buf_pos += 18; /* skip OS header (16 bytes) and version number */
990 flags = bytestream_get_le16(&buf_pos);
991 data_size = bytestream_get_le32(&buf_pos);
992 cb_offset = *buf_pos++;
993 buf_pos += 3; /* skip reserved byte and checksum */
994 image_height = bytestream_get_le16(&buf_pos);
995 image_width = bytestream_get_le16(&buf_pos);
997 if(avcodec_check_dimensions(NULL, image_width, image_height))
1000 chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
1001 chroma_width = ((image_width >> 2) + 3) & 0x7ffc;
1002 y_offset = bytestream_get_le32(&buf_pos);
1003 v_offset = bytestream_get_le32(&buf_pos);
1004 u_offset = bytestream_get_le32(&buf_pos);
1005 buf_pos += 4; /* reserved */
1007 if(data_size == 0x80) return 4;
1009 if(FFMAX3(y_offset, v_offset, u_offset) >= buf_size-16) {
1010 av_log(s->avctx, AV_LOG_ERROR, "y/u/v offset outside buffer\n");
1015 s->cur_frame = s->iv_frame + 1;
1016 s->ref_frame = s->iv_frame;
1018 s->cur_frame = s->iv_frame;
1019 s->ref_frame = s->iv_frame + 1;
1022 buf_pos = buf + 16 + y_offset;
1023 mc_vector_count = bytestream_get_le32(&buf_pos);
1024 if(2LL*mc_vector_count >= buf_size-16-y_offset) {
1025 av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
1029 iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, image_width,
1030 image_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1031 FFMIN(image_width, 160));
1033 if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1036 buf_pos = buf + 16 + v_offset;
1037 mc_vector_count = bytestream_get_le32(&buf_pos);
1038 if(2LL*mc_vector_count >= buf_size-16-v_offset) {
1039 av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
1043 iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width,
1044 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1045 FFMIN(chroma_width, 40));
1047 buf_pos = buf + 16 + u_offset;
1048 mc_vector_count = bytestream_get_le32(&buf_pos);
1049 if(2LL*mc_vector_count >= buf_size-16-u_offset) {
1050 av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n");
1054 iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width,
1055 chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos,
1056 FFMIN(chroma_width, 40));
1063 static int indeo3_decode_frame(AVCodecContext *avctx,
1064 void *data, int *data_size,
1067 const uint8_t *buf = avpkt->data;
1068 int buf_size = avpkt->size;
1069 Indeo3DecodeContext *s=avctx->priv_data;
1070 uint8_t *src, *dest;
1073 if (iv_decode_frame(s, buf, buf_size) < 0)
1076 if(s->frame.data[0])
1077 avctx->release_buffer(avctx, &s->frame);
1079 s->frame.reference = 0;
1080 if(avctx->get_buffer(avctx, &s->frame) < 0) {
1081 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1085 src = s->cur_frame->Ybuf;
1086 dest = s->frame.data[0];
1087 for (y = 0; y < s->height; y++) {
1088 memcpy(dest, src, s->cur_frame->y_w);
1089 src += s->cur_frame->y_w;
1090 dest += s->frame.linesize[0];
1093 if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1095 src = s->cur_frame->Ubuf;
1096 dest = s->frame.data[1];
1097 for (y = 0; y < s->height / 4; y++) {
1098 memcpy(dest, src, s->cur_frame->uv_w);
1099 src += s->cur_frame->uv_w;
1100 dest += s->frame.linesize[1];
1103 src = s->cur_frame->Vbuf;
1104 dest = s->frame.data[2];
1105 for (y = 0; y < s->height / 4; y++) {
1106 memcpy(dest, src, s->cur_frame->uv_w);
1107 src += s->cur_frame->uv_w;
1108 dest += s->frame.linesize[2];
1112 *data_size=sizeof(AVFrame);
1113 *(AVFrame*)data= s->frame;
1118 static av_cold int indeo3_decode_end(AVCodecContext *avctx)
1120 Indeo3DecodeContext *s = avctx->priv_data;
1127 AVCodec indeo3_decoder = {
1131 sizeof(Indeo3DecodeContext),
1135 indeo3_decode_frame,
1138 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),