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https://github.com/FFmpeg/FFmpeg.git
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666 lines
19 KiB
C
666 lines
19 KiB
C
/*
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* Zip Motion Blocks Video (ZMBV) decoder
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* Copyright (c) 2006 Konstantin Shishkov
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Zip Motion Blocks Video decoder
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include <zlib.h>
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#define ZMBV_KEYFRAME 1
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#define ZMBV_DELTAPAL 2
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enum ZmbvFormat {
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ZMBV_FMT_NONE = 0,
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ZMBV_FMT_1BPP = 1,
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ZMBV_FMT_2BPP = 2,
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ZMBV_FMT_4BPP = 3,
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ZMBV_FMT_8BPP = 4,
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ZMBV_FMT_15BPP = 5,
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ZMBV_FMT_16BPP = 6,
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ZMBV_FMT_24BPP = 7,
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ZMBV_FMT_32BPP = 8
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};
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/*
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* Decoder context
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*/
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typedef struct ZmbvContext {
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AVCodecContext *avctx;
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AVFrame pic;
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int bpp;
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unsigned int decomp_size;
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uint8_t* decomp_buf;
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uint8_t pal[768];
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uint8_t *prev, *cur;
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int width, height;
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int fmt;
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int comp;
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int flags;
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int bw, bh, bx, by;
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int decomp_len;
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z_stream zstream;
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int (*decode_intra)(struct ZmbvContext *c);
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int (*decode_xor)(struct ZmbvContext *c);
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} ZmbvContext;
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/**
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* Decode XOR'ed frame - 8bpp version
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*/
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static int zmbv_decode_xor_8(ZmbvContext *c)
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{
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uint8_t *src = c->decomp_buf;
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uint8_t *output, *prev;
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int8_t *mvec;
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int x, y;
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int d, dx, dy, bw2, bh2;
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int block;
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int i, j;
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int mx, my;
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output = c->cur;
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prev = c->prev;
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if(c->flags & ZMBV_DELTAPAL){
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for(i = 0; i < 768; i++)
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c->pal[i] ^= *src++;
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}
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mvec = (int8_t*)src;
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src += ((c->bx * c->by * 2 + 3) & ~3);
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block = 0;
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for(y = 0; y < c->height; y += c->bh) {
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bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
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for(x = 0; x < c->width; x += c->bw) {
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uint8_t *out, *tprev;
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d = mvec[block] & 1;
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dx = mvec[block] >> 1;
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dy = mvec[block + 1] >> 1;
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block += 2;
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bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
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/* copy block - motion vectors out of bounds are used to zero blocks */
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out = output + x;
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tprev = prev + x + dx + dy * c->width;
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mx = x + dx;
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my = y + dy;
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for(j = 0; j < bh2; j++){
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if((my + j < 0) || (my + j >= c->height)) {
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memset(out, 0, bw2);
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} else {
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for(i = 0; i < bw2; i++){
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if((mx + i < 0) || (mx + i >= c->width))
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out[i] = 0;
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else
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out[i] = tprev[i];
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}
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}
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out += c->width;
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tprev += c->width;
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}
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if(d) { /* apply XOR'ed difference */
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out = output + x;
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for(j = 0; j < bh2; j++){
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for(i = 0; i < bw2; i++)
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out[i] ^= *src++;
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out += c->width;
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}
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}
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}
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output += c->width * c->bh;
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prev += c->width * c->bh;
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}
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if(src - c->decomp_buf != c->decomp_len)
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av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
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return 0;
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}
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/**
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* Decode XOR'ed frame - 15bpp and 16bpp version
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*/
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static int zmbv_decode_xor_16(ZmbvContext *c)
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{
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uint8_t *src = c->decomp_buf;
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uint16_t *output, *prev;
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int8_t *mvec;
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int x, y;
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int d, dx, dy, bw2, bh2;
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int block;
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int i, j;
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int mx, my;
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output = (uint16_t*)c->cur;
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prev = (uint16_t*)c->prev;
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mvec = (int8_t*)src;
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src += ((c->bx * c->by * 2 + 3) & ~3);
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block = 0;
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for(y = 0; y < c->height; y += c->bh) {
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bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
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for(x = 0; x < c->width; x += c->bw) {
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uint16_t *out, *tprev;
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d = mvec[block] & 1;
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dx = mvec[block] >> 1;
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dy = mvec[block + 1] >> 1;
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block += 2;
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bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
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/* copy block - motion vectors out of bounds are used to zero blocks */
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out = output + x;
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tprev = prev + x + dx + dy * c->width;
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mx = x + dx;
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my = y + dy;
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for(j = 0; j < bh2; j++){
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if((my + j < 0) || (my + j >= c->height)) {
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memset(out, 0, bw2 * 2);
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} else {
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for(i = 0; i < bw2; i++){
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if((mx + i < 0) || (mx + i >= c->width))
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out[i] = 0;
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else
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out[i] = tprev[i];
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}
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}
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out += c->width;
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tprev += c->width;
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}
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if(d) { /* apply XOR'ed difference */
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out = output + x;
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for(j = 0; j < bh2; j++){
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for(i = 0; i < bw2; i++) {
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out[i] ^= *((uint16_t*)src);
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src += 2;
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}
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out += c->width;
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}
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}
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}
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output += c->width * c->bh;
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prev += c->width * c->bh;
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}
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if(src - c->decomp_buf != c->decomp_len)
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av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
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return 0;
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}
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#ifdef ZMBV_ENABLE_24BPP
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/**
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* Decode XOR'ed frame - 24bpp version
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*/
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static int zmbv_decode_xor_24(ZmbvContext *c)
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{
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uint8_t *src = c->decomp_buf;
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uint8_t *output, *prev;
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int8_t *mvec;
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int x, y;
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int d, dx, dy, bw2, bh2;
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int block;
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int i, j;
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int mx, my;
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int stride;
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output = c->cur;
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prev = c->prev;
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stride = c->width * 3;
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mvec = (int8_t*)src;
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src += ((c->bx * c->by * 2 + 3) & ~3);
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block = 0;
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for(y = 0; y < c->height; y += c->bh) {
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bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
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for(x = 0; x < c->width; x += c->bw) {
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uint8_t *out, *tprev;
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d = mvec[block] & 1;
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dx = mvec[block] >> 1;
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dy = mvec[block + 1] >> 1;
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block += 2;
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bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
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/* copy block - motion vectors out of bounds are used to zero blocks */
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out = output + x * 3;
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tprev = prev + (x + dx) * 3 + dy * stride;
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mx = x + dx;
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my = y + dy;
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for(j = 0; j < bh2; j++){
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if((my + j < 0) || (my + j >= c->height)) {
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memset(out, 0, bw2 * 3);
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} else {
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for(i = 0; i < bw2; i++){
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if((mx + i < 0) || (mx + i >= c->width)) {
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out[i * 3 + 0] = 0;
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out[i * 3 + 1] = 0;
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out[i * 3 + 2] = 0;
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} else {
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out[i * 3 + 0] = tprev[i * 3 + 0];
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out[i * 3 + 1] = tprev[i * 3 + 1];
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out[i * 3 + 2] = tprev[i * 3 + 2];
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}
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}
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}
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out += stride;
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tprev += stride;
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}
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if(d) { /* apply XOR'ed difference */
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out = output + x * 3;
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for(j = 0; j < bh2; j++){
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for(i = 0; i < bw2; i++) {
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out[i * 3 + 0] ^= *src++;
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out[i * 3 + 1] ^= *src++;
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out[i * 3 + 2] ^= *src++;
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}
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out += stride;
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}
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}
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}
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output += stride * c->bh;
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prev += stride * c->bh;
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}
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if(src - c->decomp_buf != c->decomp_len)
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av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", src-c->decomp_buf, c->decomp_len);
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return 0;
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}
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#endif //ZMBV_ENABLE_24BPP
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/**
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* Decode XOR'ed frame - 32bpp version
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*/
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static int zmbv_decode_xor_32(ZmbvContext *c)
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{
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uint8_t *src = c->decomp_buf;
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uint32_t *output, *prev;
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int8_t *mvec;
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int x, y;
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int d, dx, dy, bw2, bh2;
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int block;
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int i, j;
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int mx, my;
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output = (uint32_t*)c->cur;
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prev = (uint32_t*)c->prev;
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mvec = (int8_t*)src;
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src += ((c->bx * c->by * 2 + 3) & ~3);
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block = 0;
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for(y = 0; y < c->height; y += c->bh) {
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bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
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for(x = 0; x < c->width; x += c->bw) {
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uint32_t *out, *tprev;
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d = mvec[block] & 1;
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dx = mvec[block] >> 1;
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dy = mvec[block + 1] >> 1;
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block += 2;
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bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
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/* copy block - motion vectors out of bounds are used to zero blocks */
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out = output + x;
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tprev = prev + x + dx + dy * c->width;
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mx = x + dx;
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my = y + dy;
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for(j = 0; j < bh2; j++){
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if((my + j < 0) || (my + j >= c->height)) {
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memset(out, 0, bw2 * 4);
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} else {
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for(i = 0; i < bw2; i++){
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if((mx + i < 0) || (mx + i >= c->width))
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out[i] = 0;
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else
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out[i] = tprev[i];
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}
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}
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out += c->width;
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tprev += c->width;
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}
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if(d) { /* apply XOR'ed difference */
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out = output + x;
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for(j = 0; j < bh2; j++){
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for(i = 0; i < bw2; i++) {
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out[i] ^= *((uint32_t*)src);
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src += 4;
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}
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out += c->width;
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}
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}
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}
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output += c->width * c->bh;
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prev += c->width * c->bh;
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}
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if(src - c->decomp_buf != c->decomp_len)
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av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
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return 0;
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}
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/**
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* Decode intraframe
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*/
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static int zmbv_decode_intra(ZmbvContext *c)
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{
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uint8_t *src = c->decomp_buf;
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/* make the palette available on the way out */
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if (c->fmt == ZMBV_FMT_8BPP) {
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memcpy(c->pal, src, 768);
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src += 768;
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}
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memcpy(c->cur, src, c->width * c->height * (c->bpp / 8));
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
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{
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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ZmbvContext * const c = avctx->priv_data;
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int zret = Z_OK; // Zlib return code
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int len = buf_size;
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int hi_ver, lo_ver;
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if(c->pic.data[0])
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avctx->release_buffer(avctx, &c->pic);
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c->pic.reference = 1;
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c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
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if(avctx->get_buffer(avctx, &c->pic) < 0){
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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}
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/* parse header */
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c->flags = buf[0];
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buf++; len--;
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if(c->flags & ZMBV_KEYFRAME) {
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hi_ver = buf[0];
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lo_ver = buf[1];
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c->comp = buf[2];
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c->fmt = buf[3];
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c->bw = buf[4];
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c->bh = buf[5];
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buf += 6;
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len -= 6;
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av_log(avctx, AV_LOG_DEBUG, "Flags=%X ver=%i.%i comp=%i fmt=%i blk=%ix%i\n",c->flags,hi_ver,lo_ver,c->comp,c->fmt,c->bw,c->bh);
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if(hi_ver != 0 || lo_ver != 1) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported version %i.%i\n", hi_ver, lo_ver);
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return -1;
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}
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if(c->bw == 0 || c->bh == 0) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported block size %ix%i\n", c->bw, c->bh);
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return -1;
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}
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if(c->comp != 0 && c->comp != 1) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported compression type %i\n", c->comp);
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return -1;
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}
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switch(c->fmt) {
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case ZMBV_FMT_8BPP:
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c->bpp = 8;
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c->decode_intra = zmbv_decode_intra;
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c->decode_xor = zmbv_decode_xor_8;
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break;
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case ZMBV_FMT_15BPP:
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case ZMBV_FMT_16BPP:
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c->bpp = 16;
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c->decode_intra = zmbv_decode_intra;
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c->decode_xor = zmbv_decode_xor_16;
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break;
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#ifdef ZMBV_ENABLE_24BPP
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case ZMBV_FMT_24BPP:
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c->bpp = 24;
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c->decode_intra = zmbv_decode_intra;
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c->decode_xor = zmbv_decode_xor_24;
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break;
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#endif //ZMBV_ENABLE_24BPP
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case ZMBV_FMT_32BPP:
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c->bpp = 32;
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c->decode_intra = zmbv_decode_intra;
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c->decode_xor = zmbv_decode_xor_32;
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break;
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default:
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c->decode_intra = NULL;
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c->decode_xor = NULL;
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av_log(avctx, AV_LOG_ERROR, "Unsupported (for now) format %i\n", c->fmt);
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return -1;
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}
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zret = inflateReset(&c->zstream);
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if (zret != Z_OK) {
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av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
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return -1;
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}
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c->cur = av_realloc(c->cur, avctx->width * avctx->height * (c->bpp / 8));
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c->prev = av_realloc(c->prev, avctx->width * avctx->height * (c->bpp / 8));
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c->bx = (c->width + c->bw - 1) / c->bw;
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c->by = (c->height+ c->bh - 1) / c->bh;
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}
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if(c->decode_intra == NULL) {
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av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n");
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return -1;
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}
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if(c->comp == 0) { //Uncompressed data
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memcpy(c->decomp_buf, buf, len);
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c->decomp_size = 1;
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} else { // ZLIB-compressed data
|
|
c->zstream.total_in = c->zstream.total_out = 0;
|
|
c->zstream.next_in = buf;
|
|
c->zstream.avail_in = len;
|
|
c->zstream.next_out = c->decomp_buf;
|
|
c->zstream.avail_out = c->decomp_size;
|
|
inflate(&c->zstream, Z_FINISH);
|
|
c->decomp_len = c->zstream.total_out;
|
|
}
|
|
if(c->flags & ZMBV_KEYFRAME) {
|
|
c->pic.key_frame = 1;
|
|
c->pic.pict_type = FF_I_TYPE;
|
|
c->decode_intra(c);
|
|
} else {
|
|
c->pic.key_frame = 0;
|
|
c->pic.pict_type = FF_P_TYPE;
|
|
if(c->decomp_len)
|
|
c->decode_xor(c);
|
|
}
|
|
|
|
/* update frames */
|
|
{
|
|
uint8_t *out, *src;
|
|
int i, j;
|
|
|
|
out = c->pic.data[0];
|
|
src = c->cur;
|
|
switch(c->fmt) {
|
|
case ZMBV_FMT_8BPP:
|
|
for(j = 0; j < c->height; j++) {
|
|
for(i = 0; i < c->width; i++) {
|
|
out[i * 3 + 0] = c->pal[(*src) * 3 + 0];
|
|
out[i * 3 + 1] = c->pal[(*src) * 3 + 1];
|
|
out[i * 3 + 2] = c->pal[(*src) * 3 + 2];
|
|
src++;
|
|
}
|
|
out += c->pic.linesize[0];
|
|
}
|
|
break;
|
|
case ZMBV_FMT_15BPP:
|
|
for(j = 0; j < c->height; j++) {
|
|
for(i = 0; i < c->width; i++) {
|
|
uint16_t tmp = AV_RL16(src);
|
|
src += 2;
|
|
out[i * 3 + 0] = (tmp & 0x7C00) >> 7;
|
|
out[i * 3 + 1] = (tmp & 0x03E0) >> 2;
|
|
out[i * 3 + 2] = (tmp & 0x001F) << 3;
|
|
}
|
|
out += c->pic.linesize[0];
|
|
}
|
|
break;
|
|
case ZMBV_FMT_16BPP:
|
|
for(j = 0; j < c->height; j++) {
|
|
for(i = 0; i < c->width; i++) {
|
|
uint16_t tmp = AV_RL16(src);
|
|
src += 2;
|
|
out[i * 3 + 0] = (tmp & 0xF800) >> 8;
|
|
out[i * 3 + 1] = (tmp & 0x07E0) >> 3;
|
|
out[i * 3 + 2] = (tmp & 0x001F) << 3;
|
|
}
|
|
out += c->pic.linesize[0];
|
|
}
|
|
break;
|
|
#ifdef ZMBV_ENABLE_24BPP
|
|
case ZMBV_FMT_24BPP:
|
|
for(j = 0; j < c->height; j++) {
|
|
memcpy(out, src, c->width * 3);
|
|
src += c->width * 3;
|
|
out += c->pic.linesize[0];
|
|
}
|
|
break;
|
|
#endif //ZMBV_ENABLE_24BPP
|
|
case ZMBV_FMT_32BPP:
|
|
for(j = 0; j < c->height; j++) {
|
|
for(i = 0; i < c->width; i++) {
|
|
uint32_t tmp = AV_RL32(src);
|
|
src += 4;
|
|
AV_WB24(out+(i*3), tmp);
|
|
}
|
|
out += c->pic.linesize[0];
|
|
}
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt);
|
|
}
|
|
memcpy(c->prev, c->cur, c->width * c->height * (c->bpp / 8));
|
|
}
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = c->pic;
|
|
|
|
/* always report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Init zmbv decoder
|
|
*
|
|
*/
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
ZmbvContext * const c = avctx->priv_data;
|
|
int zret; // Zlib return code
|
|
|
|
c->avctx = avctx;
|
|
|
|
c->width = avctx->width;
|
|
c->height = avctx->height;
|
|
|
|
c->bpp = avctx->bits_per_coded_sample;
|
|
|
|
// Needed if zlib unused or init aborted before inflateInit
|
|
memset(&(c->zstream), 0, sizeof(z_stream));
|
|
|
|
avctx->pix_fmt = PIX_FMT_RGB24;
|
|
c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64);
|
|
|
|
/* Allocate decompression buffer */
|
|
if (c->decomp_size) {
|
|
if ((c->decomp_buf = av_malloc(c->decomp_size)) == NULL) {
|
|
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
c->zstream.zalloc = Z_NULL;
|
|
c->zstream.zfree = Z_NULL;
|
|
c->zstream.opaque = Z_NULL;
|
|
zret = inflateInit(&(c->zstream));
|
|
if (zret != Z_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Uninit zmbv decoder
|
|
*
|
|
*/
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
|
{
|
|
ZmbvContext * const c = avctx->priv_data;
|
|
|
|
av_freep(&c->decomp_buf);
|
|
|
|
if (c->pic.data[0])
|
|
avctx->release_buffer(avctx, &c->pic);
|
|
inflateEnd(&(c->zstream));
|
|
av_freep(&c->cur);
|
|
av_freep(&c->prev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_zmbv_decoder = {
|
|
"zmbv",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_ZMBV,
|
|
sizeof(ZmbvContext),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
|
|
};
|
|
|