/*
- *
+ * IBM Ultimotion Video Decoder
* Copyright (C) 2004 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * Libav 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
- *
- * IBM Ultimotion Video Decoder
- *
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file ulti.c
+ * @file
* IBM Ultimotion Video Decoder.
*/
-
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
#include "avcodec.h"
+#include "bytestream.h"
+#include "internal.h"
#include "ulti_cb.h"
typedef struct UltimotionDecodeContext {
AVCodecContext *avctx;
int width, height, blocks;
- AVFrame frame;
- uint8_t *ulti_codebook;
+ AVFrame *frame;
+ const uint8_t *ulti_codebook;
+ GetByteContext gb;
} UltimotionDecodeContext;
-static int ulti_decode_init(AVCodecContext *avctx)
+static av_cold int ulti_decode_init(AVCodecContext *avctx)
{
UltimotionDecodeContext *s = avctx->priv_data;
s->width = avctx->width;
s->height = avctx->height;
s->blocks = (s->width / 8) * (s->height / 8);
- avctx->pix_fmt = PIX_FMT_YUV410P;
- avctx->has_b_frames = 0;
- avctx->coded_frame = (AVFrame*) &s->frame;
+ avctx->pix_fmt = AV_PIX_FMT_YUV410P;
s->ulti_codebook = ulti_codebook;
+ s->frame = av_frame_alloc();
+ if (!s->frame)
+ return AVERROR(ENOMEM);
+
return 0;
}
-static int block_coords[8] = // 4x4 block coords in 8x8 superblock
+static av_cold int ulti_decode_end(AVCodecContext *avctx){
+ UltimotionDecodeContext *s = avctx->priv_data;
+
+ av_frame_free(&s->frame);
+
+ return 0;
+}
+
+static const int block_coords[8] = // 4x4 block coords in 8x8 superblock
{ 0, 0, 0, 4, 4, 4, 4, 0};
-static int angle_by_index[4] = { 0, 2, 6, 12};
+static const int angle_by_index[4] = { 0, 2, 6, 12};
/* Lookup tables for luma and chroma - used by ulti_convert_yuv() */
-static uint8_t ulti_lumas[64] =
+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,
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 uint8_t ulti_chromas[16] =
+
+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 *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];
- }
+ 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)
+ 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;
+ 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;
+ if(f1 & mask)
+ Luma[i] = Y1;
+ else
+ Luma[i] = Y0;
}
-
+
ulti_convert_yuv(frame, x, y, Luma, chroma);
}
{
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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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,
- uint8_t *buf, int buf_size)
+static int ulti_decode_frame(AVCodecContext *avctx,
+ void *data, int *got_frame,
+ 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 blocks = 0;
int done = 0;
int x = 0, y = 0;
- int i;
+ int i, ret;
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;
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return ret;
}
-
+
+ bytestream2_init(&s->gb, buf, buf_size);
+
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 = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *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 = (*buf++) << 8;
- tmp += (*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 = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[0] = (tmp >> 18) & 0x3F;
- Luma[1] = (tmp >> 12) & 0x3F;
- Luma[2] = (tmp >> 6) & 0x3F;
- Luma[3] = tmp & 0x3F;
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[4] = (tmp >> 18) & 0x3F;
- Luma[5] = (tmp >> 12) & 0x3F;
- Luma[6] = (tmp >> 6) & 0x3F;
- Luma[7] = tmp & 0x3F;
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[8] = (tmp >> 18) & 0x3F;
- Luma[9] = (tmp >> 12) & 0x3F;
- Luma[10] = (tmp >> 6) & 0x3F;
- Luma[11] = tmp & 0x3F;
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *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;
- }
- }
+ int idx;
+ if(blocks >= s->blocks || y >= s->height)
+ break;//all blocks decoded
+
+ if (bytestream2_get_bytes_left(&s->gb) < 1)
+ goto err;
+ idx = bytestream2_get_byteu(&s->gb);
+ if((idx & 0xF8) == 0x70) {
+ switch(idx) {
+ case 0x70: //change modifier
+ modifier = bytestream2_get_byte(&s->gb);
+ 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 = bytestream2_get_byte(&s->gb);
+ 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 = bytestream2_get_byte(&s->gb);
+ }
+ }
+ 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 = bytestream2_get_byte(&s->gb);
+ }
+ tx = x + block_coords[i * 2];
+ ty = y + block_coords[(i * 2) + 1];
+ switch(code) {
+ case 1:
+ tmp = bytestream2_get_byte(&s->gb);
+
+ 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 = bytestream2_get_be24(&s->gb);
+
+ 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 = bytestream2_get_be16(&s->gb);
+
+ 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];
+
+ if (bytestream2_get_bytes_left(&s->gb) < 12)
+ goto err;
+ tmp = bytestream2_get_be24u(&s->gb);
+ Luma[0] = (tmp >> 18) & 0x3F;
+ Luma[1] = (tmp >> 12) & 0x3F;
+ Luma[2] = (tmp >> 6) & 0x3F;
+ Luma[3] = tmp & 0x3F;
+
+ tmp = bytestream2_get_be24u(&s->gb);
+ Luma[4] = (tmp >> 18) & 0x3F;
+ Luma[5] = (tmp >> 12) & 0x3F;
+ Luma[6] = (tmp >> 6) & 0x3F;
+ Luma[7] = tmp & 0x3F;
+
+ tmp = bytestream2_get_be24u(&s->gb);
+ Luma[8] = (tmp >> 18) & 0x3F;
+ Luma[9] = (tmp >> 12) & 0x3F;
+ Luma[10] = (tmp >> 6) & 0x3F;
+ Luma[11] = tmp & 0x3F;
+
+ tmp = bytestream2_get_be24u(&s->gb);
+ 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 {
+ if (bytestream2_get_bytes_left(&s->gb) < 4)
+ goto err;
+ tmp = bytestream2_get_byteu(&s->gb);
+ if(tmp & 0x80) {
+ angle = (tmp >> 4) & 0x7;
+ tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb);
+ Y[0] = (tmp >> 6) & 0x3F;
+ Y[1] = tmp & 0x3F;
+ Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ ulti_grad(s->frame, tx, ty, Y, chroma, angle); //draw block
+ } else { // some patterns
+ int f0 = tmp;
+ int f1 = bytestream2_get_byteu(&s->gb);
+ Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ ulti_pattern(s->frame, tx, ty, f0, f1, 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;
-}
+ *got_frame = 1;
+ if ((ret = av_frame_ref(data, s->frame)) < 0)
+ return ret;
-static int ulti_decode_end(AVCodecContext *avctx)
-{
-/* UltimotionDecodeContext *s = avctx->priv_data;*/
+ return buf_size;
- return 0;
+err:
+ av_log(avctx, AV_LOG_ERROR,
+ "Insufficient data\n");
+ return AVERROR_INVALIDDATA;
}
-AVCodec ulti_decoder = {
- "ultimotion",
- CODEC_TYPE_VIDEO,
- CODEC_ID_ULTI,
- sizeof(UltimotionDecodeContext),
- ulti_decode_init,
- NULL,
- ulti_decode_end,
- ulti_decode_frame,
- CODEC_CAP_DR1,
- NULL
+AVCodec ff_ulti_decoder = {
+ .name = "ultimotion",
+ .long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_ULTI,
+ .priv_data_size = sizeof(UltimotionDecodeContext),
+ .init = ulti_decode_init,
+ .close = ulti_decode_end,
+ .decode = ulti_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
};
-
projects / ffmpeg / blobdiff