| /* |
| * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg |
| * written, produced, and directed by Alan Smithee |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "avcodec.h" |
| #include "dsputil.h" |
| #include "bytestream.h" |
| |
| #include "indeo3data.h" |
| |
| typedef struct |
| { |
| uint8_t *Ybuf; |
| uint8_t *Ubuf; |
| uint8_t *Vbuf; |
| unsigned short y_w, y_h; |
| unsigned short uv_w, uv_h; |
| } YUVBufs; |
| |
| typedef struct Indeo3DecodeContext { |
| AVCodecContext *avctx; |
| int width, height; |
| AVFrame frame; |
| |
| uint8_t *buf; |
| YUVBufs iv_frame[2]; |
| YUVBufs *cur_frame; |
| YUVBufs *ref_frame; |
| |
| uint8_t *ModPred; |
| uint8_t *corrector_type; |
| } Indeo3DecodeContext; |
| |
| static const uint8_t corrector_type_0[24] = { |
| 195, 159, 133, 115, 101, 93, 87, 77, |
| 195, 159, 133, 115, 101, 93, 87, 77, |
| 128, 79, 79, 79, 79, 79, 79, 79 |
| }; |
| |
| static const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 }; |
| |
| static av_cold int build_modpred(Indeo3DecodeContext *s) |
| { |
| int i, j; |
| |
| if (!(s->ModPred = av_malloc(8 * 128))) |
| return AVERROR(ENOMEM); |
| |
| for (i=0; i < 128; ++i) { |
| s->ModPred[i+0*128] = i > 126 ? 254 : 2*(i + 1 - ((i + 1) % 2)); |
| s->ModPred[i+1*128] = i == 7 ? 20 : |
| i == 119 || |
| i == 120 ? 236 : 2*(i + 2 - ((i + 1) % 3)); |
| s->ModPred[i+2*128] = i > 125 ? 248 : 2*(i + 2 - ((i + 2) % 4)); |
| s->ModPred[i+3*128] = 2*(i + 1 - ((i - 3) % 5)); |
| s->ModPred[i+4*128] = i == 8 ? 20 : 2*(i + 1 - ((i - 3) % 6)); |
| s->ModPred[i+5*128] = 2*(i + 4 - ((i + 3) % 7)); |
| s->ModPred[i+6*128] = i > 123 ? 240 : 2*(i + 4 - ((i + 4) % 8)); |
| s->ModPred[i+7*128] = 2*(i + 5 - ((i + 4) % 9)); |
| } |
| |
| if (!(s->corrector_type = av_malloc(24 * 256))) |
| return AVERROR(ENOMEM); |
| |
| for (i=0; i < 24; ++i) { |
| for (j=0; j < 256; ++j) { |
| s->corrector_type[i*256+j] = j < corrector_type_0[i] ? 1 : |
| j < 248 || (i == 16 && j == 248) ? 0 : |
| corrector_type_2[j - 248]; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int iv_alloc_frames(Indeo3DecodeContext *s) |
| { |
| int luma_width = (s->width + 3) & ~3, |
| luma_height = (s->height + 3) & ~3, |
| chroma_width = ((luma_width >> 2) + 3) & ~3, |
| chroma_height = ((luma_height >> 2) + 3) & ~3, |
| luma_pixels = luma_width * luma_height, |
| chroma_pixels = chroma_width * chroma_height, |
| i; |
| unsigned int bufsize = luma_pixels * 2 + luma_width * 3 + |
| (chroma_pixels + chroma_width) * 4; |
| |
| if(!(s->buf = av_malloc(bufsize))) |
| return AVERROR(ENOMEM); |
| s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width; |
| s->iv_frame[0].y_h = s->iv_frame[1].y_h = luma_height; |
| s->iv_frame[0].uv_w = s->iv_frame[1].uv_w = chroma_width; |
| s->iv_frame[0].uv_h = s->iv_frame[1].uv_h = chroma_height; |
| |
| s->iv_frame[0].Ybuf = s->buf + luma_width; |
| i = luma_pixels + luma_width * 2; |
| s->iv_frame[1].Ybuf = s->buf + i; |
| i += (luma_pixels + luma_width); |
| s->iv_frame[0].Ubuf = s->buf + i; |
| i += (chroma_pixels + chroma_width); |
| s->iv_frame[1].Ubuf = s->buf + i; |
| i += (chroma_pixels + chroma_width); |
| s->iv_frame[0].Vbuf = s->buf + i; |
| i += (chroma_pixels + chroma_width); |
| s->iv_frame[1].Vbuf = s->buf + i; |
| |
| for(i = 1; i <= luma_width; i++) |
| s->iv_frame[0].Ybuf[-i] = s->iv_frame[1].Ybuf[-i] = |
| s->iv_frame[0].Ubuf[-i] = 0x80; |
| |
| for(i = 1; i <= chroma_width; i++) { |
| s->iv_frame[1].Ubuf[-i] = 0x80; |
| s->iv_frame[0].Vbuf[-i] = 0x80; |
| s->iv_frame[1].Vbuf[-i] = 0x80; |
| s->iv_frame[1].Vbuf[chroma_pixels+i-1] = 0x80; |
| } |
| |
| return 0; |
| } |
| |
| static av_cold void iv_free_func(Indeo3DecodeContext *s) |
| { |
| av_free(s->buf); |
| av_free(s->ModPred); |
| av_free(s->corrector_type); |
| } |
| |
| struct ustr { |
| long xpos; |
| long ypos; |
| long width; |
| long height; |
| long split_flag; |
| long split_direction; |
| long usl7; |
| }; |
| |
| |
| #define LV1_CHECK(buf1,rle_v3,lv1,lp2) \ |
| if((lv1 & 0x80) != 0) { \ |
| if(rle_v3 != 0) \ |
| rle_v3 = 0; \ |
| else { \ |
| rle_v3 = 1; \ |
| buf1 -= 2; \ |
| } \ |
| } \ |
| lp2 = 4; |
| |
| |
| #define RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) \ |
| if(rle_v3 == 0) { \ |
| rle_v2 = *buf1; \ |
| rle_v1 = 1; \ |
| if(rle_v2 > 32) { \ |
| rle_v2 -= 32; \ |
| rle_v1 = 0; \ |
| } \ |
| rle_v3 = 1; \ |
| } \ |
| buf1--; |
| |
| |
| #define LP2_CHECK(buf1,rle_v3,lp2) \ |
| if(lp2 == 0 && rle_v3 != 0) \ |
| rle_v3 = 0; \ |
| else { \ |
| buf1--; \ |
| rle_v3 = 1; \ |
| } |
| |
| |
| #define RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) \ |
| rle_v2--; \ |
| if(rle_v2 == 0) { \ |
| rle_v3 = 0; \ |
| buf1 += 2; \ |
| } \ |
| lp2 = 4; |
| |
| static void iv_Decode_Chunk(Indeo3DecodeContext *s, |
| uint8_t *cur, uint8_t *ref, int width, int height, |
| const uint8_t *buf1, long cb_offset, const uint8_t *hdr, |
| const uint8_t *buf2, int min_width_160) |
| { |
| uint8_t bit_buf; |
| unsigned long bit_pos, lv, lv1, lv2; |
| long *width_tbl, width_tbl_arr[10]; |
| const signed char *ref_vectors; |
| uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2; |
| uint32_t *cur_lp, *ref_lp; |
| const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2]; |
| uint8_t *correction_type_sp[2]; |
| struct ustr strip_tbl[20], *strip; |
| int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width, |
| rle_v1, rle_v2, rle_v3; |
| unsigned short res; |
| |
| bit_buf = 0; |
| ref_vectors = NULL; |
| |
| width_tbl = width_tbl_arr + 1; |
| i = (width < 0 ? width + 3 : width)/4; |
| for(j = -1; j < 8; j++) |
| width_tbl[j] = i * j; |
| |
| strip = strip_tbl; |
| |
| for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160); |
| |
| strip->ypos = strip->xpos = 0; |
| for(strip->width = min_width_160; width > strip->width; strip->width *= 2); |
| strip->height = height; |
| strip->split_direction = 0; |
| strip->split_flag = 0; |
| strip->usl7 = 0; |
| |
| bit_pos = 0; |
| |
| rle_v1 = rle_v2 = rle_v3 = 0; |
| |
| while(strip >= strip_tbl) { |
| if(bit_pos <= 0) { |
| bit_pos = 8; |
| bit_buf = *buf1++; |
| } |
| |
| bit_pos -= 2; |
| cmd = (bit_buf >> bit_pos) & 0x03; |
| |
| if(cmd == 0) { |
| strip++; |
| if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) { |
| av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n"); |
| break; |
| } |
| memcpy(strip, strip-1, sizeof(*strip)); |
| strip->split_flag = 1; |
| strip->split_direction = 0; |
| strip->height = (strip->height > 8 ? ((strip->height+8)>>4)<<3 : 4); |
| continue; |
| } else if(cmd == 1) { |
| strip++; |
| if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) { |
| av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n"); |
| break; |
| } |
| memcpy(strip, strip-1, sizeof(*strip)); |
| strip->split_flag = 1; |
| strip->split_direction = 1; |
| strip->width = (strip->width > 8 ? ((strip->width+8)>>4)<<3 : 4); |
| continue; |
| } else if(cmd == 2) { |
| if(strip->usl7 == 0) { |
| strip->usl7 = 1; |
| ref_vectors = NULL; |
| continue; |
| } |
| } else if(cmd == 3) { |
| if(strip->usl7 == 0) { |
| strip->usl7 = 1; |
| ref_vectors = (const signed char*)buf2 + (*buf1 * 2); |
| buf1++; |
| continue; |
| } |
| } |
| |
| cur_frm_pos = cur + width * strip->ypos + strip->xpos; |
| |
| if((blks_width = strip->width) < 0) |
| blks_width += 3; |
| blks_width >>= 2; |
| blks_height = strip->height; |
| |
| if(ref_vectors != NULL) { |
| ref_frm_pos = ref + (ref_vectors[0] + strip->ypos) * width + |
| ref_vectors[1] + strip->xpos; |
| } else |
| ref_frm_pos = cur_frm_pos - width_tbl[4]; |
| |
| if(cmd == 2) { |
| if(bit_pos <= 0) { |
| bit_pos = 8; |
| bit_buf = *buf1++; |
| } |
| |
| bit_pos -= 2; |
| cmd = (bit_buf >> bit_pos) & 0x03; |
| |
| if(cmd == 0 || ref_vectors != NULL) { |
| for(lp1 = 0; lp1 < blks_width; lp1++) { |
| for(i = 0, j = 0; i < blks_height; i++, j += width_tbl[1]) |
| ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j]; |
| cur_frm_pos += 4; |
| ref_frm_pos += 4; |
| } |
| } else if(cmd != 1) |
| return; |
| } else { |
| k = *buf1 >> 4; |
| j = *buf1 & 0x0f; |
| buf1++; |
| lv = j + cb_offset; |
| |
| if((lv - 8) <= 7 && (k == 0 || k == 3 || k == 10)) { |
| cp2 = s->ModPred + ((lv - 8) << 7); |
| cp = ref_frm_pos; |
| for(i = 0; i < blks_width << 2; i++) { |
| int v = *cp >> 1; |
| *(cp++) = cp2[v]; |
| } |
| } |
| |
| if(k == 1 || k == 4) { |
| lv = (hdr[j] & 0xf) + cb_offset; |
| correction_type_sp[0] = s->corrector_type + (lv << 8); |
| correction_lp[0] = correction + (lv << 8); |
| lv = (hdr[j] >> 4) + cb_offset; |
| correction_lp[1] = correction + (lv << 8); |
| correction_type_sp[1] = s->corrector_type + (lv << 8); |
| } else { |
| correctionloworder_lp[0] = correctionloworder_lp[1] = correctionloworder + (lv << 8); |
| correctionhighorder_lp[0] = correctionhighorder_lp[1] = correctionhighorder + (lv << 8); |
| correction_type_sp[0] = correction_type_sp[1] = s->corrector_type + (lv << 8); |
| correction_lp[0] = correction_lp[1] = correction + (lv << 8); |
| } |
| |
| switch(k) { |
| case 1: |
| case 0: /********** CASE 0 **********/ |
| for( ; blks_height > 0; blks_height -= 4) { |
| for(lp1 = 0; lp1 < blks_width; lp1++) { |
| for(lp2 = 0; lp2 < 4; ) { |
| k = *buf1++; |
| cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2]; |
| ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2]; |
| |
| switch(correction_type_sp[0][k]) { |
| case 0: |
| *cur_lp = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1); |
| lp2++; |
| break; |
| case 1: |
| res = ((le2me_16(((unsigned short *)(ref_lp))[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1; |
| ((unsigned short *)cur_lp)[0] = le2me_16(res); |
| res = ((le2me_16(((unsigned short *)(ref_lp))[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1; |
| ((unsigned short *)cur_lp)[1] = le2me_16(res); |
| buf1++; |
| lp2++; |
| break; |
| case 2: |
| if(lp2 == 0) { |
| for(i = 0, j = 0; i < 2; i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| lp2 += 2; |
| } |
| break; |
| case 3: |
| if(lp2 < 2) { |
| for(i = 0, j = 0; i < (3 - lp2); i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| lp2 = 3; |
| } |
| break; |
| case 8: |
| if(lp2 == 0) { |
| RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) |
| |
| if(rle_v1 == 1 || ref_vectors != NULL) { |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| } |
| |
| RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) |
| break; |
| } else { |
| rle_v1 = 1; |
| rle_v2 = *buf1 - 1; |
| } |
| case 5: |
| LP2_CHECK(buf1,rle_v3,lp2) |
| case 4: |
| for(i = 0, j = 0; i < (4 - lp2); i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| lp2 = 4; |
| break; |
| |
| case 7: |
| if(rle_v3 != 0) |
| rle_v3 = 0; |
| else { |
| buf1--; |
| rle_v3 = 1; |
| } |
| case 6: |
| if(ref_vectors != NULL) { |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| } |
| lp2 = 4; |
| break; |
| |
| case 9: |
| lv1 = *buf1++; |
| lv = (lv1 & 0x7F) << 1; |
| lv += (lv << 8); |
| lv += (lv << 16); |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = lv; |
| |
| LV1_CHECK(buf1,rle_v3,lv1,lp2) |
| break; |
| default: |
| return; |
| } |
| } |
| |
| cur_frm_pos += 4; |
| ref_frm_pos += 4; |
| } |
| |
| cur_frm_pos += ((width - blks_width) * 4); |
| ref_frm_pos += ((width - blks_width) * 4); |
| } |
| break; |
| |
| case 4: |
| case 3: /********** CASE 3 **********/ |
| if(ref_vectors != NULL) |
| return; |
| flag1 = 1; |
| |
| for( ; blks_height > 0; blks_height -= 8) { |
| for(lp1 = 0; lp1 < blks_width; lp1++) { |
| for(lp2 = 0; lp2 < 4; ) { |
| k = *buf1++; |
| |
| cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2]; |
| ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1]; |
| |
| switch(correction_type_sp[lp2 & 0x01][k]) { |
| case 0: |
| cur_lp[width_tbl[1]] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1); |
| if(lp2 > 0 || flag1 == 0 || strip->ypos != 0) |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| else |
| cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1); |
| lp2++; |
| break; |
| |
| case 1: |
| res = ((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + correction_lp[lp2 & 0x01][*buf1]) << 1; |
| ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res); |
| res = ((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1; |
| ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res); |
| |
| if(lp2 > 0 || flag1 == 0 || strip->ypos != 0) |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| else |
| cur_lp[0] = cur_lp[width_tbl[1]]; |
| buf1++; |
| lp2++; |
| break; |
| |
| case 2: |
| if(lp2 == 0) { |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = *ref_lp; |
| lp2 += 2; |
| } |
| break; |
| |
| case 3: |
| if(lp2 < 2) { |
| for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) |
| cur_lp[j] = *ref_lp; |
| lp2 = 3; |
| } |
| break; |
| |
| case 6: |
| lp2 = 4; |
| break; |
| |
| case 7: |
| if(rle_v3 != 0) |
| rle_v3 = 0; |
| else { |
| buf1--; |
| rle_v3 = 1; |
| } |
| lp2 = 4; |
| break; |
| |
| case 8: |
| if(lp2 == 0) { |
| RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) |
| |
| if(rle_v1 == 1) { |
| for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| } |
| |
| RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) |
| break; |
| } else { |
| rle_v2 = (*buf1) - 1; |
| rle_v1 = 1; |
| } |
| case 5: |
| LP2_CHECK(buf1,rle_v3,lp2) |
| case 4: |
| for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) |
| cur_lp[j] = *ref_lp; |
| lp2 = 4; |
| break; |
| |
| case 9: |
| av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n"); |
| lv1 = *buf1++; |
| lv = (lv1 & 0x7F) << 1; |
| lv += (lv << 8); |
| lv += (lv << 16); |
| |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = lv; |
| |
| LV1_CHECK(buf1,rle_v3,lv1,lp2) |
| break; |
| |
| default: |
| return; |
| } |
| } |
| |
| cur_frm_pos += 4; |
| } |
| |
| cur_frm_pos += (((width * 2) - blks_width) * 4); |
| flag1 = 0; |
| } |
| break; |
| |
| case 10: /********** CASE 10 **********/ |
| if(ref_vectors == NULL) { |
| flag1 = 1; |
| |
| for( ; blks_height > 0; blks_height -= 8) { |
| for(lp1 = 0; lp1 < blks_width; lp1 += 2) { |
| for(lp2 = 0; lp2 < 4; ) { |
| k = *buf1++; |
| cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2]; |
| ref_lp = ((uint32_t *)cur_frm_pos) + width_tbl[(lp2 * 2) - 1]; |
| lv1 = ref_lp[0]; |
| lv2 = ref_lp[1]; |
| if(lp2 == 0 && flag1 != 0) { |
| #ifdef WORDS_BIGENDIAN |
| lv1 = lv1 & 0xFF00FF00; |
| lv1 = (lv1 >> 8) | lv1; |
| lv2 = lv2 & 0xFF00FF00; |
| lv2 = (lv2 >> 8) | lv2; |
| #else |
| lv1 = lv1 & 0x00FF00FF; |
| lv1 = (lv1 << 8) | lv1; |
| lv2 = lv2 & 0x00FF00FF; |
| lv2 = (lv2 << 8) | lv2; |
| #endif |
| } |
| |
| switch(correction_type_sp[lp2 & 0x01][k]) { |
| case 0: |
| cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1); |
| cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionhighorder_lp[lp2 & 0x01][k]) << 1); |
| if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) { |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE; |
| } else { |
| cur_lp[0] = cur_lp[width_tbl[1]]; |
| cur_lp[1] = cur_lp[width_tbl[1]+1]; |
| } |
| lp2++; |
| break; |
| |
| case 1: |
| cur_lp[width_tbl[1]] = le2me_32(((le2me_32(lv1) >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1]) << 1); |
| cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(lv2) >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1); |
| if(lp2 > 0 || strip->ypos != 0 || flag1 == 0) { |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE; |
| } else { |
| cur_lp[0] = cur_lp[width_tbl[1]]; |
| cur_lp[1] = cur_lp[width_tbl[1]+1]; |
| } |
| buf1++; |
| lp2++; |
| break; |
| |
| case 2: |
| if(lp2 == 0) { |
| if(flag1 != 0) { |
| for(i = 0, j = width_tbl[1]; i < 3; i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE; |
| } else { |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| } |
| lp2 += 2; |
| } |
| break; |
| |
| case 3: |
| if(lp2 < 2) { |
| if(lp2 == 0 && flag1 != 0) { |
| for(i = 0, j = width_tbl[1]; i < 5; i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE; |
| } else { |
| for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| } |
| lp2 = 3; |
| } |
| break; |
| |
| case 8: |
| if(lp2 == 0) { |
| RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) |
| if(rle_v1 == 1) { |
| if(flag1 != 0) { |
| for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE; |
| } else { |
| for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| } |
| } |
| RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) |
| break; |
| } else { |
| rle_v1 = 1; |
| rle_v2 = (*buf1) - 1; |
| } |
| case 5: |
| LP2_CHECK(buf1,rle_v3,lp2) |
| case 4: |
| if(lp2 == 0 && flag1 != 0) { |
| for(i = 0, j = width_tbl[1]; i < 7; i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| cur_lp[0] = ((cur_lp[-width_tbl[1]] >> 1) + (cur_lp[width_tbl[1]] >> 1)) & 0xFEFEFEFE; |
| cur_lp[1] = ((cur_lp[-width_tbl[1]+1] >> 1) + (cur_lp[width_tbl[1]+1] >> 1)) & 0xFEFEFEFE; |
| } else { |
| for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) { |
| cur_lp[j] = lv1; |
| cur_lp[j+1] = lv2; |
| } |
| } |
| lp2 = 4; |
| break; |
| |
| case 6: |
| lp2 = 4; |
| break; |
| |
| case 7: |
| if(lp2 == 0) { |
| if(rle_v3 != 0) |
| rle_v3 = 0; |
| else { |
| buf1--; |
| rle_v3 = 1; |
| } |
| lp2 = 4; |
| } |
| break; |
| |
| case 9: |
| av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n"); |
| lv1 = *buf1; |
| lv = (lv1 & 0x7F) << 1; |
| lv += (lv << 8); |
| lv += (lv << 16); |
| for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) |
| cur_lp[j] = lv; |
| LV1_CHECK(buf1,rle_v3,lv1,lp2) |
| break; |
| |
| default: |
| return; |
| } |
| } |
| |
| cur_frm_pos += 8; |
| } |
| |
| cur_frm_pos += (((width * 2) - blks_width) * 4); |
| flag1 = 0; |
| } |
| } else { |
| for( ; blks_height > 0; blks_height -= 8) { |
| for(lp1 = 0; lp1 < blks_width; lp1 += 2) { |
| for(lp2 = 0; lp2 < 4; ) { |
| k = *buf1++; |
| cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2]; |
| ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2]; |
| |
| switch(correction_type_sp[lp2 & 0x01][k]) { |
| case 0: |
| lv1 = correctionloworder_lp[lp2 & 0x01][k]; |
| lv2 = correctionhighorder_lp[lp2 & 0x01][k]; |
| cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1); |
| cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1); |
| cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1); |
| cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1); |
| lp2++; |
| break; |
| |
| case 1: |
| lv1 = correctionloworder_lp[lp2 & 0x01][*buf1++]; |
| lv2 = correctionloworder_lp[lp2 & 0x01][k]; |
| cur_lp[0] = le2me_32(((le2me_32(ref_lp[0]) >> 1) + lv1) << 1); |
| cur_lp[1] = le2me_32(((le2me_32(ref_lp[1]) >> 1) + lv2) << 1); |
| cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + lv1) << 1); |
| cur_lp[width_tbl[1]+1] = le2me_32(((le2me_32(ref_lp[width_tbl[1]+1]) >> 1) + lv2) << 1); |
| lp2++; |
| break; |
| |
| case 2: |
| if(lp2 == 0) { |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) { |
| cur_lp[j] = ref_lp[j]; |
| cur_lp[j+1] = ref_lp[j+1]; |
| } |
| lp2 += 2; |
| } |
| break; |
| |
| case 3: |
| if(lp2 < 2) { |
| for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) { |
| cur_lp[j] = ref_lp[j]; |
| cur_lp[j+1] = ref_lp[j+1]; |
| } |
| lp2 = 3; |
| } |
| break; |
| |
| case 8: |
| if(lp2 == 0) { |
| RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) |
| for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) { |
| ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)ref_frm_pos)[j]; |
| ((uint32_t *)cur_frm_pos)[j+1] = ((uint32_t *)ref_frm_pos)[j+1]; |
| } |
| RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) |
| break; |
| } else { |
| rle_v1 = 1; |
| rle_v2 = (*buf1) - 1; |
| } |
| case 5: |
| case 7: |
| LP2_CHECK(buf1,rle_v3,lp2) |
| case 6: |
| case 4: |
| for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) { |
| cur_lp[j] = ref_lp[j]; |
| cur_lp[j+1] = ref_lp[j+1]; |
| } |
| lp2 = 4; |
| break; |
| |
| case 9: |
| av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n"); |
| lv1 = *buf1; |
| lv = (lv1 & 0x7F) << 1; |
| lv += (lv << 8); |
| lv += (lv << 16); |
| for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) |
| ((uint32_t *)cur_frm_pos)[j] = ((uint32_t *)cur_frm_pos)[j+1] = lv; |
| LV1_CHECK(buf1,rle_v3,lv1,lp2) |
| break; |
| |
| default: |
| return; |
| } |
| } |
| |
| cur_frm_pos += 8; |
| ref_frm_pos += 8; |
| } |
| |
| cur_frm_pos += (((width * 2) - blks_width) * 4); |
| ref_frm_pos += (((width * 2) - blks_width) * 4); |
| } |
| } |
| break; |
| |
| case 11: /********** CASE 11 **********/ |
| if(ref_vectors == NULL) |
| return; |
| |
| for( ; blks_height > 0; blks_height -= 8) { |
| for(lp1 = 0; lp1 < blks_width; lp1++) { |
| for(lp2 = 0; lp2 < 4; ) { |
| k = *buf1++; |
| cur_lp = ((uint32_t *)cur_frm_pos) + width_tbl[lp2 * 2]; |
| ref_lp = ((uint32_t *)ref_frm_pos) + width_tbl[lp2 * 2]; |
| |
| switch(correction_type_sp[lp2 & 0x01][k]) { |
| case 0: |
| cur_lp[0] = le2me_32(((le2me_32(*ref_lp) >> 1) + correction_lp[lp2 & 0x01][k]) << 1); |
| cur_lp[width_tbl[1]] = le2me_32(((le2me_32(ref_lp[width_tbl[1]]) >> 1) + correction_lp[lp2 & 0x01][k]) << 1); |
| lp2++; |
| break; |
| |
| case 1: |
| lv1 = (unsigned short)(correction_lp[lp2 & 0x01][*buf1++]); |
| lv2 = (unsigned short)(correction_lp[lp2 & 0x01][k]); |
| res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[0]) >> 1) + lv1) << 1); |
| ((unsigned short *)cur_lp)[0] = le2me_16(res); |
| res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[1]) >> 1) + lv2) << 1); |
| ((unsigned short *)cur_lp)[1] = le2me_16(res); |
| res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]]) >> 1) + lv1) << 1); |
| ((unsigned short *)cur_lp)[width_tbl[2]] = le2me_16(res); |
| res = (unsigned short)(((le2me_16(((unsigned short *)ref_lp)[width_tbl[2]+1]) >> 1) + lv2) << 1); |
| ((unsigned short *)cur_lp)[width_tbl[2]+1] = le2me_16(res); |
| lp2++; |
| break; |
| |
| case 2: |
| if(lp2 == 0) { |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| lp2 += 2; |
| } |
| break; |
| |
| case 3: |
| if(lp2 < 2) { |
| for(i = 0, j = 0; i < 6 - (lp2 * 2); i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| lp2 = 3; |
| } |
| break; |
| |
| case 8: |
| if(lp2 == 0) { |
| RLE_V3_CHECK(buf1,rle_v1,rle_v2,rle_v3) |
| |
| for(i = 0, j = 0; i < 8; i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| |
| RLE_V2_CHECK(buf1,rle_v2, rle_v3,lp2) |
| break; |
| } else { |
| rle_v1 = 1; |
| rle_v2 = (*buf1) - 1; |
| } |
| case 5: |
| case 7: |
| LP2_CHECK(buf1,rle_v3,lp2) |
| case 4: |
| case 6: |
| for(i = 0, j = 0; i < 8 - (lp2 * 2); i++, j += width_tbl[1]) |
| cur_lp[j] = ref_lp[j]; |
| lp2 = 4; |
| break; |
| |
| case 9: |
| av_log(s->avctx, AV_LOG_ERROR, "UNTESTED.\n"); |
| lv1 = *buf1++; |
| lv = (lv1 & 0x7F) << 1; |
| lv += (lv << 8); |
| lv += (lv << 16); |
| for(i = 0, j = 0; i < 4; i++, j += width_tbl[1]) |
| cur_lp[j] = lv; |
| LV1_CHECK(buf1,rle_v3,lv1,lp2) |
| break; |
| |
| default: |
| return; |
| } |
| } |
| |
| cur_frm_pos += 4; |
| ref_frm_pos += 4; |
| } |
| |
| cur_frm_pos += (((width * 2) - blks_width) * 4); |
| ref_frm_pos += (((width * 2) - blks_width) * 4); |
| } |
| break; |
| |
| default: |
| return; |
| } |
| } |
| |
| for( ; strip >= strip_tbl; strip--) { |
| if(strip->split_flag != 0) { |
| strip->split_flag = 0; |
| strip->usl7 = (strip-1)->usl7; |
| |
| if(strip->split_direction) { |
| strip->xpos += strip->width; |
| strip->width = (strip-1)->width - strip->width; |
| if(region_160_width <= strip->xpos && width < strip->width + strip->xpos) |
| strip->width = width - strip->xpos; |
| } else { |
| strip->ypos += strip->height; |
| strip->height = (strip-1)->height - strip->height; |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| static av_cold int indeo3_decode_init(AVCodecContext *avctx) |
| { |
| Indeo3DecodeContext *s = avctx->priv_data; |
| int ret = 0; |
| |
| s->avctx = avctx; |
| s->width = avctx->width; |
| s->height = avctx->height; |
| avctx->pix_fmt = PIX_FMT_YUV410P; |
| |
| if (!(ret = build_modpred(s))) |
| ret = iv_alloc_frames(s); |
| if (ret) |
| iv_free_func(s); |
| |
| return ret; |
| } |
| |
| static int iv_decode_frame(Indeo3DecodeContext *s, |
| const uint8_t *buf, int buf_size) |
| { |
| unsigned int image_width, image_height, |
| chroma_width, chroma_height; |
| unsigned long flags, cb_offset, data_size, |
| y_offset, v_offset, u_offset, mc_vector_count; |
| const uint8_t *hdr_pos, *buf_pos; |
| |
| buf_pos = buf; |
| buf_pos += 18; /* skip OS header (16 bytes) and version number */ |
| |
| flags = bytestream_get_le16(&buf_pos); |
| data_size = bytestream_get_le32(&buf_pos); |
| cb_offset = *buf_pos++; |
| buf_pos += 3; /* skip reserved byte and checksum */ |
| image_height = bytestream_get_le16(&buf_pos); |
| image_width = bytestream_get_le16(&buf_pos); |
| |
| if(avcodec_check_dimensions(NULL, image_width, image_height)) |
| return -1; |
| |
| chroma_height = ((image_height >> 2) + 3) & 0x7ffc; |
| chroma_width = ((image_width >> 2) + 3) & 0x7ffc; |
| y_offset = bytestream_get_le32(&buf_pos); |
| v_offset = bytestream_get_le32(&buf_pos); |
| u_offset = bytestream_get_le32(&buf_pos); |
| buf_pos += 4; /* reserved */ |
| hdr_pos = buf_pos; |
| if(data_size == 0x80) return 4; |
| |
| if(FFMAX3(y_offset, v_offset, u_offset) >= buf_size-16) { |
| av_log(s->avctx, AV_LOG_ERROR, "y/u/v offset outside buffer\n"); |
| return -1; |
| } |
| |
| if(flags & 0x200) { |
| s->cur_frame = s->iv_frame + 1; |
| s->ref_frame = s->iv_frame; |
| } else { |
| s->cur_frame = s->iv_frame; |
| s->ref_frame = s->iv_frame + 1; |
| } |
| |
| buf_pos = buf + 16 + y_offset; |
| mc_vector_count = bytestream_get_le32(&buf_pos); |
| if(2LL*mc_vector_count >= buf_size-16-y_offset) { |
| av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n"); |
| return -1; |
| } |
| |
| iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, image_width, |
| image_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos, |
| FFMIN(image_width, 160)); |
| |
| if (!(s->avctx->flags & CODEC_FLAG_GRAY)) |
| { |
| |
| buf_pos = buf + 16 + v_offset; |
| mc_vector_count = bytestream_get_le32(&buf_pos); |
| if(2LL*mc_vector_count >= buf_size-16-v_offset) { |
| av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n"); |
| return -1; |
| } |
| |
| iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width, |
| chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos, |
| FFMIN(chroma_width, 40)); |
| |
| buf_pos = buf + 16 + u_offset; |
| mc_vector_count = bytestream_get_le32(&buf_pos); |
| if(2LL*mc_vector_count >= buf_size-16-u_offset) { |
| av_log(s->avctx, AV_LOG_ERROR, "mc_vector_count too large\n"); |
| return -1; |
| } |
| |
| iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width, |
| chroma_height, buf_pos + mc_vector_count * 2, cb_offset, hdr_pos, buf_pos, |
| FFMIN(chroma_width, 40)); |
| |
| } |
| |
| return 8; |
| } |
| |
| static int indeo3_decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| const uint8_t *buf, int buf_size) |
| { |
| Indeo3DecodeContext *s=avctx->priv_data; |
| uint8_t *src, *dest; |
| int y; |
| |
| if (iv_decode_frame(s, buf, buf_size) < 0) |
| return -1; |
| |
| if(s->frame.data[0]) |
| avctx->release_buffer(avctx, &s->frame); |
| |
| s->frame.reference = 0; |
| if(avctx->get_buffer(avctx, &s->frame) < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| return -1; |
| } |
| |
| src = s->cur_frame->Ybuf; |
| dest = s->frame.data[0]; |
| for (y = 0; y < s->height; y++) { |
| memcpy(dest, src, s->cur_frame->y_w); |
| src += s->cur_frame->y_w; |
| dest += s->frame.linesize[0]; |
| } |
| |
| if (!(s->avctx->flags & CODEC_FLAG_GRAY)) |
| { |
| src = s->cur_frame->Ubuf; |
| dest = s->frame.data[1]; |
| for (y = 0; y < s->height / 4; y++) { |
| memcpy(dest, src, s->cur_frame->uv_w); |
| src += s->cur_frame->uv_w; |
| dest += s->frame.linesize[1]; |
| } |
| |
| src = s->cur_frame->Vbuf; |
| dest = s->frame.data[2]; |
| for (y = 0; y < s->height / 4; y++) { |
| memcpy(dest, src, s->cur_frame->uv_w); |
| src += s->cur_frame->uv_w; |
| dest += s->frame.linesize[2]; |
| } |
| } |
| |
| *data_size=sizeof(AVFrame); |
| *(AVFrame*)data= s->frame; |
| |
| return buf_size; |
| } |
| |
| static av_cold int indeo3_decode_end(AVCodecContext *avctx) |
| { |
| Indeo3DecodeContext *s = avctx->priv_data; |
| |
| iv_free_func(s); |
| |
| return 0; |
| } |
| |
| AVCodec indeo3_decoder = { |
| "indeo3", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_INDEO3, |
| sizeof(Indeo3DecodeContext), |
| indeo3_decode_init, |
| NULL, |
| indeo3_decode_end, |
| indeo3_decode_frame, |
| 0, |
| NULL, |
| .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"), |
| }; |
