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Diffstat (limited to 'libavcodec/ulti.c')
-rw-r--r-- | libavcodec/ulti.c | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/libavcodec/ulti.c b/libavcodec/ulti.c new file mode 100644 index 0000000..d4a0c84 --- /dev/null +++ b/libavcodec/ulti.c @@ -0,0 +1,428 @@ +/* + * + * Copyright (C) 2004 Konstantin Shishkov + * + * 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 + * + * IBM Ultimotion Video Decoder + * + */ + +/** + * @file ulti.c + * IBM Ultimotion Video Decoder. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "common.h" +#include "avcodec.h" + +#include "ulti_cb.h" + +typedef struct UltimotionDecodeContext { + AVCodecContext *avctx; + int width, height, blocks; + AVFrame frame; + uint8_t *ulti_codebook; +} UltimotionDecodeContext; + +static 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->has_b_frames = 0; + avctx->coded_frame = (AVFrame*) &s->frame; + s->ulti_codebook = ulti_codebook; + + return 0; +} + +static 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}; + +/* Lookup tables for luma and chroma - used by ulti_convert_yuv() */ +static 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 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, + uint8_t *buf, int buf_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 = (*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; + } + } + } + + *data_size=sizeof(AVFrame); + *(AVFrame*)data= s->frame; + + return buf_size; +} + +static int ulti_decode_end(AVCodecContext *avctx) +{ +/* UltimotionDecodeContext *s = avctx->priv_data;*/ + + return 0; +} + +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 +}; + |