mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
72415b2adb
is deprecated and will be dropped at the next major bump. Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
421 lines
14 KiB
C
421 lines
14 KiB
C
/*
|
|
* IBM Ultimotion Video Decoder
|
|
* Copyright (C) 2004 Konstantin Shishkov
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file libavcodec/ulti.c
|
|
* IBM Ultimotion Video Decoder.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "avcodec.h"
|
|
#include "bytestream.h"
|
|
|
|
#include "ulti_cb.h"
|
|
|
|
typedef struct UltimotionDecodeContext {
|
|
AVCodecContext *avctx;
|
|
int width, height, blocks;
|
|
AVFrame frame;
|
|
const uint8_t *ulti_codebook;
|
|
} UltimotionDecodeContext;
|
|
|
|
static av_cold int ulti_decode_init(AVCodecContext *avctx)
|
|
{
|
|
UltimotionDecodeContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
s->width = avctx->width;
|
|
s->height = avctx->height;
|
|
s->blocks = (s->width / 8) * (s->height / 8);
|
|
avctx->pix_fmt = PIX_FMT_YUV410P;
|
|
avctx->coded_frame = (AVFrame*) &s->frame;
|
|
s->ulti_codebook = ulti_codebook;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int ulti_decode_end(AVCodecContext *avctx){
|
|
UltimotionDecodeContext *s = avctx->priv_data;
|
|
AVFrame *pic = &s->frame;
|
|
|
|
if (pic->data[0])
|
|
avctx->release_buffer(avctx, pic);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const int block_coords[8] = // 4x4 block coords in 8x8 superblock
|
|
{ 0, 0, 0, 4, 4, 4, 4, 0};
|
|
|
|
static const int angle_by_index[4] = { 0, 2, 6, 12};
|
|
|
|
/* Lookup tables for luma and chroma - used by ulti_convert_yuv() */
|
|
static const uint8_t ulti_lumas[64] =
|
|
{ 0x10, 0x13, 0x17, 0x1A, 0x1E, 0x21, 0x25, 0x28,
|
|
0x2C, 0x2F, 0x33, 0x36, 0x3A, 0x3D, 0x41, 0x44,
|
|
0x48, 0x4B, 0x4F, 0x52, 0x56, 0x59, 0x5C, 0x60,
|
|
0x63, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C,
|
|
0x7F, 0x83, 0x86, 0x8A, 0x8D, 0x91, 0x94, 0x98,
|
|
0x9B, 0x9F, 0xA2, 0xA5, 0xA9, 0xAC, 0xB0, 0xB3,
|
|
0xB7, 0xBA, 0xBE, 0xC1, 0xC5, 0xC8, 0xCC, 0xCF,
|
|
0xD3, 0xD6, 0xDA, 0xDD, 0xE1, 0xE4, 0xE8, 0xEB};
|
|
|
|
static const uint8_t ulti_chromas[16] =
|
|
{ 0x60, 0x67, 0x6D, 0x73, 0x7A, 0x80, 0x86, 0x8D,
|
|
0x93, 0x99, 0xA0, 0xA6, 0xAC, 0xB3, 0xB9, 0xC0};
|
|
|
|
/* convert Ultimotion YUV block (sixteen 6-bit Y samples and
|
|
two 4-bit chroma samples) into standard YUV and put it into frame */
|
|
static void ulti_convert_yuv(AVFrame *frame, int x, int y,
|
|
uint8_t *luma,int chroma)
|
|
{
|
|
uint8_t *y_plane, *cr_plane, *cb_plane;
|
|
int i;
|
|
|
|
y_plane = frame->data[0] + x + y * frame->linesize[0];
|
|
cr_plane = frame->data[1] + (x / 4) + (y / 4) * frame->linesize[1];
|
|
cb_plane = frame->data[2] + (x / 4) + (y / 4) * frame->linesize[2];
|
|
|
|
cr_plane[0] = ulti_chromas[chroma >> 4];
|
|
|
|
cb_plane[0] = ulti_chromas[chroma & 0xF];
|
|
|
|
|
|
for(i = 0; i < 16; i++){
|
|
y_plane[i & 3] = ulti_lumas[luma[i]];
|
|
if((i & 3) == 3) { //next row
|
|
y_plane += frame->linesize[0];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* generate block like in MS Video1 */
|
|
static void ulti_pattern(AVFrame *frame, int x, int y,
|
|
int f0, int f1, int Y0, int Y1, int chroma)
|
|
{
|
|
uint8_t Luma[16];
|
|
int mask, i;
|
|
for(mask = 0x80, i = 0; mask; mask >>= 1, i++) {
|
|
if(f0 & mask)
|
|
Luma[i] = Y1;
|
|
else
|
|
Luma[i] = Y0;
|
|
}
|
|
|
|
for(mask = 0x80, i = 8; mask; mask >>= 1, i++) {
|
|
if(f1 & mask)
|
|
Luma[i] = Y1;
|
|
else
|
|
Luma[i] = Y0;
|
|
}
|
|
|
|
ulti_convert_yuv(frame, x, y, Luma, chroma);
|
|
}
|
|
|
|
/* fill block with some gradient */
|
|
static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int angle)
|
|
{
|
|
uint8_t Luma[16];
|
|
if(angle & 8) { //reverse order
|
|
int t;
|
|
angle &= 0x7;
|
|
t = Y[0];
|
|
Y[0] = Y[3];
|
|
Y[3] = t;
|
|
t = Y[1];
|
|
Y[1] = Y[2];
|
|
Y[2] = t;
|
|
}
|
|
switch(angle){
|
|
case 0:
|
|
Luma[0] = Y[0]; Luma[1] = Y[1]; Luma[2] = Y[2]; Luma[3] = Y[3];
|
|
Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3];
|
|
Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3];
|
|
Luma[12] = Y[0]; Luma[13] = Y[1]; Luma[14] = Y[2]; Luma[15] = Y[3];
|
|
break;
|
|
case 1:
|
|
Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3];
|
|
Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3];
|
|
Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3];
|
|
Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2];
|
|
break;
|
|
case 2:
|
|
Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3];
|
|
Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3];
|
|
Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2];
|
|
Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2];
|
|
break;
|
|
case 3:
|
|
Luma[0] = Y[2]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3];
|
|
Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3];
|
|
Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2];
|
|
Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[1];
|
|
break;
|
|
case 4:
|
|
Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3];
|
|
Luma[4] = Y[2]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[2];
|
|
Luma[8] = Y[1]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[1];
|
|
Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0];
|
|
break;
|
|
case 5:
|
|
Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[2];
|
|
Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[1];
|
|
Luma[8] = Y[2]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[0];
|
|
Luma[12] = Y[1]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0];
|
|
break;
|
|
case 6:
|
|
Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[2];
|
|
Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[1];
|
|
Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0];
|
|
Luma[12] = Y[1]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0];
|
|
break;
|
|
case 7:
|
|
Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[1];
|
|
Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[0];
|
|
Luma[8] = Y[3]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0];
|
|
Luma[12] = Y[2]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0];
|
|
break;
|
|
default:
|
|
Luma[0] = Y[0]; Luma[1] = Y[0]; Luma[2] = Y[1]; Luma[3] = Y[1];
|
|
Luma[4] = Y[0]; Luma[5] = Y[0]; Luma[6] = Y[1]; Luma[7] = Y[1];
|
|
Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[3]; Luma[11] = Y[3];
|
|
Luma[12] = Y[2]; Luma[13] = Y[2]; Luma[14] = Y[3]; Luma[15] = Y[3];
|
|
break;
|
|
}
|
|
|
|
ulti_convert_yuv(frame, x, y, Luma, chroma);
|
|
}
|
|
|
|
static int ulti_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
UltimotionDecodeContext *s=avctx->priv_data;
|
|
int modifier = 0;
|
|
int uniq = 0;
|
|
int mode = 0;
|
|
int blocks = 0;
|
|
int done = 0;
|
|
int x = 0, y = 0;
|
|
int i;
|
|
int skip;
|
|
int tmp;
|
|
|
|
if(s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
s->frame.reference = 1;
|
|
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
|
|
if(avctx->get_buffer(avctx, &s->frame) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
while(!done) {
|
|
int idx;
|
|
if(blocks >= s->blocks || y >= s->height)
|
|
break;//all blocks decoded
|
|
|
|
idx = *buf++;
|
|
if((idx & 0xF8) == 0x70) {
|
|
switch(idx) {
|
|
case 0x70: //change modifier
|
|
modifier = *buf++;
|
|
if(modifier>1)
|
|
av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
|
|
break;
|
|
case 0x71: // set uniq flag
|
|
uniq = 1;
|
|
break;
|
|
case 0x72: //toggle mode
|
|
mode = !mode;
|
|
break;
|
|
case 0x73: //end-of-frame
|
|
done = 1;
|
|
break;
|
|
case 0x74: //skip some blocks
|
|
skip = *buf++;
|
|
if ((blocks + skip) >= s->blocks)
|
|
break;
|
|
blocks += skip;
|
|
x += skip * 8;
|
|
while(x >= s->width) {
|
|
x -= s->width;
|
|
y += 8;
|
|
}
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx);
|
|
}
|
|
} else { //handle one block
|
|
int code;
|
|
int cf;
|
|
int angle = 0;
|
|
uint8_t Y[4]; // luma samples of block
|
|
int tx = 0, ty = 0; //coords of subblock
|
|
int chroma = 0;
|
|
if (mode || uniq) {
|
|
uniq = 0;
|
|
cf = 1;
|
|
chroma = 0;
|
|
} else {
|
|
cf = 0;
|
|
if (idx)
|
|
chroma = *buf++;
|
|
}
|
|
for (i = 0; i < 4; i++) { // for every subblock
|
|
code = (idx >> (6 - i*2)) & 3; //extract 2 bits
|
|
if(!code) //skip subblock
|
|
continue;
|
|
if(cf)
|
|
chroma = *buf++;
|
|
tx = x + block_coords[i * 2];
|
|
ty = y + block_coords[(i * 2) + 1];
|
|
switch(code) {
|
|
case 1:
|
|
tmp = *buf++;
|
|
|
|
angle = angle_by_index[(tmp >> 6) & 0x3];
|
|
|
|
Y[0] = tmp & 0x3F;
|
|
Y[1] = Y[0];
|
|
|
|
if (angle) {
|
|
Y[2] = Y[0]+1;
|
|
if (Y[2] > 0x3F)
|
|
Y[2] = 0x3F;
|
|
Y[3] = Y[2];
|
|
} else {
|
|
Y[2] = Y[0];
|
|
Y[3] = Y[0];
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
if (modifier) { // unpack four luma samples
|
|
tmp = bytestream_get_be24(&buf);
|
|
|
|
Y[0] = (tmp >> 18) & 0x3F;
|
|
Y[1] = (tmp >> 12) & 0x3F;
|
|
Y[2] = (tmp >> 6) & 0x3F;
|
|
Y[3] = tmp & 0x3F;
|
|
angle = 16;
|
|
} else { // retrieve luma samples from codebook
|
|
tmp = bytestream_get_be16(&buf);
|
|
|
|
angle = (tmp >> 12) & 0xF;
|
|
tmp &= 0xFFF;
|
|
tmp <<= 2;
|
|
Y[0] = s->ulti_codebook[tmp];
|
|
Y[1] = s->ulti_codebook[tmp + 1];
|
|
Y[2] = s->ulti_codebook[tmp + 2];
|
|
Y[3] = s->ulti_codebook[tmp + 3];
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
if (modifier) { // all 16 luma samples
|
|
uint8_t Luma[16];
|
|
|
|
tmp = bytestream_get_be24(&buf);
|
|
Luma[0] = (tmp >> 18) & 0x3F;
|
|
Luma[1] = (tmp >> 12) & 0x3F;
|
|
Luma[2] = (tmp >> 6) & 0x3F;
|
|
Luma[3] = tmp & 0x3F;
|
|
|
|
tmp = bytestream_get_be24(&buf);
|
|
Luma[4] = (tmp >> 18) & 0x3F;
|
|
Luma[5] = (tmp >> 12) & 0x3F;
|
|
Luma[6] = (tmp >> 6) & 0x3F;
|
|
Luma[7] = tmp & 0x3F;
|
|
|
|
tmp = bytestream_get_be24(&buf);
|
|
Luma[8] = (tmp >> 18) & 0x3F;
|
|
Luma[9] = (tmp >> 12) & 0x3F;
|
|
Luma[10] = (tmp >> 6) & 0x3F;
|
|
Luma[11] = tmp & 0x3F;
|
|
|
|
tmp = bytestream_get_be24(&buf);
|
|
Luma[12] = (tmp >> 18) & 0x3F;
|
|
Luma[13] = (tmp >> 12) & 0x3F;
|
|
Luma[14] = (tmp >> 6) & 0x3F;
|
|
Luma[15] = tmp & 0x3F;
|
|
|
|
ulti_convert_yuv(&s->frame, tx, ty, Luma, chroma);
|
|
} else {
|
|
tmp = *buf++;
|
|
if(tmp & 0x80) {
|
|
angle = (tmp >> 4) & 0x7;
|
|
tmp = (tmp << 8) + *buf++;
|
|
Y[0] = (tmp >> 6) & 0x3F;
|
|
Y[1] = tmp & 0x3F;
|
|
Y[2] = (*buf++) & 0x3F;
|
|
Y[3] = (*buf++) & 0x3F;
|
|
ulti_grad(&s->frame, tx, ty, Y, chroma, angle); //draw block
|
|
} else { // some patterns
|
|
int f0, f1;
|
|
f0 = *buf++;
|
|
f1 = tmp;
|
|
Y[0] = (*buf++) & 0x3F;
|
|
Y[1] = (*buf++) & 0x3F;
|
|
ulti_pattern(&s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
if(code != 3)
|
|
ulti_grad(&s->frame, tx, ty, Y, chroma, angle); // draw block
|
|
}
|
|
blocks++;
|
|
x += 8;
|
|
if(x >= s->width) {
|
|
x = 0;
|
|
y += 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
*data_size=sizeof(AVFrame);
|
|
*(AVFrame*)data= s->frame;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
AVCodec ulti_decoder = {
|
|
"ultimotion",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_ULTI,
|
|
sizeof(UltimotionDecodeContext),
|
|
ulti_decode_init,
|
|
NULL,
|
|
ulti_decode_end,
|
|
ulti_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL,
|
|
.long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"),
|
|
};
|
|
|