| /* | |
| * 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 | |
| * IBM Ultimotion Video Decoder. | |
| */ | |
| #include "avcodec.h" | |
| #include "bytestream.h" | |
| #include "codec_internal.h" | |
| #include "decode.h" | |
| #include "ulti_cb.h" | |
| typedef struct UltimotionDecodeContext { | |
| AVCodecContext *avctx; | |
| int width, height, blocks; | |
| AVFrame *frame; | |
| const uint8_t *ulti_codebook; | |
| GetByteContext gb; | |
| } 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); | |
| if (s->blocks == 0) | |
| return AVERROR_INVALIDDATA; | |
| 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 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 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, AVFrame *rframe, | |
| 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 mode = 0; | |
| int blocks = 0; | |
| int done = 0; | |
| int x = 0, y = 0; | |
| int i, ret; | |
| int skip; | |
| int tmp; | |
| if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) | |
| return ret; | |
| bytestream2_init(&s->gb, buf, buf_size); | |
| while(!done) { | |
| 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; | |
| } | |
| } | |
| } | |
| *got_frame = 1; | |
| if ((ret = av_frame_ref(rframe, s->frame)) < 0) | |
| return ret; | |
| return buf_size; | |
| err: | |
| av_log(avctx, AV_LOG_ERROR, | |
| "Insufficient data\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| const FFCodec ff_ulti_decoder = { | |
| .p.name = "ultimotion", | |
| CODEC_LONG_NAME("IBM UltiMotion"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_ULTI, | |
| .priv_data_size = sizeof(UltimotionDecodeContext), | |
| .init = ulti_decode_init, | |
| .close = ulti_decode_end, | |
| FF_CODEC_DECODE_CB(ulti_decode_frame), | |
| .p.capabilities = AV_CODEC_CAP_DR1, | |
| }; |