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FFmpeg/libavcodec/indeo3.c
Zdenek Kabelac 7fea94ce4a * fixing a few of gcc 'clean-code' warnings 
Originally committed as revision 3563 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-10-06 08:50:46 +00:00

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/*
* Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg
* written, produced, and directed by Alan Smithee
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "indeo3data.h"
typedef struct
{
unsigned char *Ybuf;
unsigned char *Ubuf;
unsigned char *Vbuf;
unsigned char *the_buf;
unsigned int the_buf_size;
unsigned short y_w, y_h;
unsigned short uv_w, uv_h;
} YUVBufs;
typedef struct Indeo3DecodeContext {
AVCodecContext *avctx;
int width, height;
AVFrame frame;
YUVBufs iv_frame[2];
YUVBufs *cur_frame;
YUVBufs *ref_frame;
unsigned char *ModPred;
unsigned short *corrector_type;
} Indeo3DecodeContext;
static int 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 int corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 };
static void build_modpred(Indeo3DecodeContext *s)
{
int i, j;
s->ModPred = (unsigned char *) av_malloc (8 * 128);
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));
}
s->corrector_type = (unsigned short *) av_malloc (24 * 256 * sizeof(unsigned short));
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]);
}
}
}
static void iv_Decode_Chunk(Indeo3DecodeContext *s, unsigned char *cur,
unsigned char *ref, int width, int height, unsigned char *buf1,
long fflags2, unsigned char *hdr,
unsigned char *buf2, int min_width_160);
#define min(a,b) ((a) < (b) ? (a) : (b))
/* ---------------------------------------------------------------------- */
static void iv_alloc_frames(Indeo3DecodeContext *s)
{
int luma_width, luma_height, luma_pixels, chroma_width, chroma_height,
chroma_pixels, i;
unsigned int bufsize;
luma_width = (s->width + 3) & (~3);
luma_height = (s->height + 3) & (~3);
s->iv_frame[0].y_w = s->iv_frame[0].y_h =
s->iv_frame[0].the_buf_size = 0;
s->iv_frame[1].y_w = s->iv_frame[1].y_h =
s->iv_frame[1].the_buf_size = 0;
s->iv_frame[1].the_buf = NULL;
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;
bufsize = luma_pixels * 2 + luma_width * 3 +
(chroma_pixels + chroma_width) * 4;
if((s->iv_frame[0].the_buf =
(s->iv_frame[0].the_buf_size == 0 ? av_malloc(bufsize) :
av_realloc(s->iv_frame[0].the_buf, bufsize))) == NULL)
return;
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].the_buf_size = bufsize;
s->iv_frame[0].Ybuf = s->iv_frame[0].the_buf + luma_width;
i = luma_pixels + luma_width * 2;
s->iv_frame[1].Ybuf = s->iv_frame[0].the_buf + i;
i += (luma_pixels + luma_width);
s->iv_frame[0].Ubuf = s->iv_frame[0].the_buf + i;
i += (chroma_pixels + chroma_width);
s->iv_frame[1].Ubuf = s->iv_frame[0].the_buf + i;
i += (chroma_pixels + chroma_width);
s->iv_frame[0].Vbuf = s->iv_frame[0].the_buf + i;
i += (chroma_pixels + chroma_width);
s->iv_frame[1].Vbuf = s->iv_frame[0].the_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;
}
}
/* ---------------------------------------------------------------------- */
static void iv_free_func(Indeo3DecodeContext *s)
{
int i;
for(i = 0 ; i < 2 ; i++) {
if(s->iv_frame[i].the_buf != NULL)
av_free(s->iv_frame[i].the_buf);
s->iv_frame[i].Ybuf = s->iv_frame[i].Ubuf =
s->iv_frame[i].Vbuf = NULL;
s->iv_frame[i].the_buf = NULL;
s->iv_frame[i].the_buf_size = 0;
s->iv_frame[i].y_w = s->iv_frame[i].y_h = 0;
s->iv_frame[i].uv_w = s->iv_frame[i].uv_h = 0;
}
av_free(s->ModPred);
av_free(s->corrector_type);
}
/* ---------------------------------------------------------------------- */
static unsigned long iv_decode_frame(Indeo3DecodeContext *s,
unsigned char *buf, int buf_size)
{
unsigned int hdr_width, hdr_height,
chroma_width, chroma_height;
unsigned long fflags1, fflags2, fflags3, offs1, offs2, offs3, offs;
unsigned char *hdr_pos, *buf_pos;
buf_pos = buf;
buf_pos += 18;
fflags1 = le2me_16(*(uint16_t *)buf_pos);
buf_pos += 2;
fflags3 = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 4;
fflags2 = *buf_pos++;
buf_pos += 3;
hdr_height = le2me_16(*(uint16_t *)buf_pos);
buf_pos += 2;
hdr_width = le2me_16(*(uint16_t *)buf_pos);
buf_pos += 2;
chroma_height = ((hdr_height >> 2) + 3) & 0x7ffc;
chroma_width = ((hdr_width >> 2) + 3) & 0x7ffc;
offs1 = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 4;
offs2 = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 4;
offs3 = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 8;
hdr_pos = buf_pos;
if(fflags3 == 0x80) return 4;
if(fflags1 & 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 + offs1;
offs = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 4;
iv_Decode_Chunk(s, s->cur_frame->Ybuf, s->ref_frame->Ybuf, hdr_width,
hdr_height, buf_pos + offs * 2, fflags2, hdr_pos, buf_pos,
min(hdr_width, 160));
if (!(s->avctx->flags & CODEC_FLAG_GRAY))
{
buf_pos = buf + 16 + offs2;
offs = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 4;
iv_Decode_Chunk(s, s->cur_frame->Vbuf, s->ref_frame->Vbuf, chroma_width,
chroma_height, buf_pos + offs * 2, fflags2, hdr_pos, buf_pos,
min(chroma_width, 40));
buf_pos = buf + 16 + offs3;
offs = le2me_32(*(uint32_t *)buf_pos);
buf_pos += 4;
iv_Decode_Chunk(s, s->cur_frame->Ubuf, s->ref_frame->Ubuf, chroma_width,
chroma_height, buf_pos + offs * 2, fflags2, hdr_pos, buf_pos,
min(chroma_width, 40));
}
return 8;
}
typedef struct {
long xpos;
long ypos;
long width;
long height;
long split_flag;
long split_direction;
long usl7;
} ustr_t;
/* ---------------------------------------------------------------------- */
#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,
unsigned char *cur, unsigned char *ref, int width, int height,
unsigned char *buf1, long fflags2, unsigned char *hdr,
unsigned char *buf2, int min_width_160)
{
unsigned char bit_buf;
unsigned long bit_pos, lv, lv1, lv2;
long *width_tbl, width_tbl_arr[10];
char *ref_vectors;
unsigned char *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];
unsigned short *correction_type_sp[2];
ustr_t 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;
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++;
memcpy(strip, strip-1, sizeof(ustr_t));
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++;
memcpy(strip, strip-1, sizeof(ustr_t));
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 = 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 + fflags2;
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) + fflags2;
correction_type_sp[0] = s->corrector_type + (lv << 8);
correction_lp[0] = correction + (lv << 8);
lv = (hdr[j] >> 4) + fflags2;
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 = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
lp2++;
break;
case 1:
((unsigned short *)cur_lp)[0] = ((((unsigned short *)(ref_lp))[0] >> 1)
+ correction_lp[lp2 & 0x01][*buf1++]) << 1;
((unsigned short *)cur_lp)[1] = ((((unsigned short *)(ref_lp))[1] >> 1)
+ correction_lp[lp2 & 0x01][k]) << 1;
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]] = ((*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] = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
lp2++;
break;
case 1:
((unsigned short *)cur_lp)[width_tbl[2]] =
((((unsigned short *)ref_lp)[0] >> 1) + correction_lp[lp2 & 0x01][*buf1++]) << 1;
((unsigned short *)cur_lp)[width_tbl[2]+1] =
((((unsigned short *)ref_lp)[1] >> 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] = cur_lp[width_tbl[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;
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) {
lv1 = lv1 & 0x00FF00FF;
lv1 = (lv1 << 8) | lv1;
lv2 = lv2 & 0x00FF00FF;
lv2 = (lv2 << 8) | lv2;
}
switch(correction_type_sp[lp2 & 0x01][k]) {
case 0:
cur_lp[width_tbl[1]] = ((lv1 >> 1) + correctionloworder_lp[lp2 & 0x01][k]) << 1;
cur_lp[width_tbl[1]+1] = ((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]] = ((lv1 >> 1) + correctionloworder_lp[lp2 & 0x01][*buf1++]) << 1;
cur_lp[width_tbl[1]+1] = ((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];
}
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] = ((ref_lp[0] >> 1) + lv1) << 1;
cur_lp[1] = ((ref_lp[1] >> 1) + lv2) << 1;
cur_lp[width_tbl[1]] = ((ref_lp[width_tbl[1]] >> 1) + lv1) << 1;
cur_lp[width_tbl[1]+1] = ((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] = ((ref_lp[0] >> 1) + lv1) << 1;
cur_lp[1] = ((ref_lp[1] >> 1) + lv2) << 1;
cur_lp[width_tbl[1]] = ((ref_lp[width_tbl[1]] >> 1) + lv1) << 1;
cur_lp[width_tbl[1]+1] = ((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] = ((*ref_lp >> 1) + correction_lp[lp2 & 0x01][k]) << 1;
cur_lp[width_tbl[1]] = ((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]);
((unsigned short *)cur_lp)[0] = ((((unsigned short *)ref_lp)[0] >> 1) + lv1) << 1;
((unsigned short *)cur_lp)[1] = ((((unsigned short *)ref_lp)[1] >> 1) + lv2) << 1;
((unsigned short *)cur_lp)[width_tbl[2]] = ((((unsigned short *)ref_lp)[width_tbl[2]] >> 1) + lv1) << 1;
((unsigned short *)cur_lp)[width_tbl[2]+1] = ((((unsigned short *)ref_lp)[width_tbl[2]+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];
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;
}
}
if(strip < strip_tbl)
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 int indeo3_decode_init(AVCodecContext *avctx)
{
Indeo3DecodeContext *s = avctx->priv_data;
s->avctx = avctx;
s->width = avctx->width;
s->height = avctx->height;
avctx->pix_fmt = PIX_FMT_YUV410P;
avctx->has_b_frames = 0;
build_modpred(s);
iv_alloc_frames(s);
return 0;
}
static int indeo3_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
unsigned char *buf, int buf_size)
{
Indeo3DecodeContext *s=avctx->priv_data;
unsigned char *src, *dest;
int y;
/* no supplementary picture */
if (buf_size == 0) {
return 0;
}
iv_decode_frame(s, buf, buf_size);
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 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
};
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