716 lines
25 KiB
C
716 lines
25 KiB
C
/*
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* LCL (LossLess Codec Library) Codec
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* Copyright (c) 2002-2004 Roberto Togni
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 lcl.c
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* LCL (LossLess Codec Library) Video Codec
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* Decoder for MSZH and ZLIB codecs
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* Experimental encoder for ZLIB RGB24
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*
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* Fourcc: MSZH, ZLIB
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*
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* Original Win32 dll:
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* Ver2.23 By Kenji Oshima 2000.09.20
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* avimszh.dll, avizlib.dll
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*
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* A description of the decoding algorithm can be found here:
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* http://www.pcisys.net/~melanson/codecs
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*
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* Supports: BGR24 (RGB 24bpp)
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "avcodec.h"
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#include "bitstream.h"
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#include "lcl.h"
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#ifdef CONFIG_ZLIB
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#include <zlib.h>
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#endif
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/*
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* Decoder context
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*/
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typedef struct LclDecContext {
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AVFrame pic;
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// Image type
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int imgtype;
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// Compression type
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int compression;
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// Flags
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int flags;
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// Decompressed data size
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unsigned int decomp_size;
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// Decompression buffer
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unsigned char* decomp_buf;
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#ifdef CONFIG_ZLIB
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z_stream zstream;
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#endif
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} LclDecContext;
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/*
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*
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* Helper functions
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*
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*/
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static inline unsigned char fix (int pix14)
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{
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int tmp;
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tmp = (pix14 + 0x80000) >> 20;
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if (tmp < 0)
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return 0;
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if (tmp > 255)
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return 255;
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return tmp;
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}
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static inline unsigned char get_b (unsigned char yq, signed char bq)
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{
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return fix((yq << 20) + bq * 1858076);
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}
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static inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
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{
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return fix((yq << 20) - bq * 360857 - rq * 748830);
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}
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static inline unsigned char get_r (unsigned char yq, signed char rq)
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{
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return fix((yq << 20) + rq * 1470103);
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}
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static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
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{
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unsigned char *destptr_bak = destptr;
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unsigned char *destptr_end = destptr + destsize;
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unsigned char mask = 0;
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unsigned char maskbit = 0;
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unsigned int ofs, cnt;
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while ((srclen > 0) && (destptr < destptr_end)) {
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if (maskbit == 0) {
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mask = *(srcptr++);
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maskbit = 8;
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srclen--;
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continue;
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}
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if ((mask & (1 << (--maskbit))) == 0) {
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if (destptr + 4 > destptr_end)
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break;
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*(int*)destptr = *(int*)srcptr;
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srclen -= 4;
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destptr += 4;
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srcptr += 4;
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} else {
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ofs = *(srcptr++);
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cnt = *(srcptr++);
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ofs += cnt * 256;
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cnt = ((cnt >> 3) & 0x1f) + 1;
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ofs &= 0x7ff;
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srclen -= 2;
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cnt *= 4;
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if (destptr + cnt > destptr_end) {
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cnt = destptr_end - destptr;
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}
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for (; cnt > 0; cnt--) {
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*(destptr) = *(destptr - ofs);
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destptr++;
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}
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}
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}
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return (destptr - destptr_bak);
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}
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/*
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*
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* Decode a frame
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*
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*/
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static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
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{
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LclDecContext * const c = avctx->priv_data;
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unsigned char *encoded = (unsigned char *)buf;
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unsigned int pixel_ptr;
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int row, col;
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unsigned char *outptr;
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unsigned int width = avctx->width; // Real image width
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unsigned int height = avctx->height; // Real image height
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unsigned int mszh_dlen;
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unsigned char yq, y1q, uq, vq;
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int uqvq;
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unsigned int mthread_inlen, mthread_outlen;
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#ifdef CONFIG_ZLIB
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int zret; // Zlib return code
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#endif
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unsigned int len = buf_size;
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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 = 0;
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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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outptr = c->pic.data[0]; // Output image pointer
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/* Decompress frame */
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switch (avctx->codec_id) {
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case CODEC_ID_MSZH:
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switch (c->compression) {
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case COMP_MSZH:
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if (c->flags & FLAG_MULTITHREAD) {
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mthread_inlen = *((unsigned int*)encoded);
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mthread_outlen = *((unsigned int*)(encoded+4));
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if (mthread_outlen > c->decomp_size) // this should not happen
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mthread_outlen = c->decomp_size;
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mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, c->decomp_buf, c->decomp_size);
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if (mthread_outlen != mszh_dlen) {
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av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n",
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mthread_outlen, mszh_dlen);
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return -1;
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}
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mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - mthread_inlen,
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c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen);
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if (mthread_outlen != mszh_dlen) {
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av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n",
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mthread_outlen, mszh_dlen);
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return -1;
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}
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encoded = c->decomp_buf;
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len = c->decomp_size;
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} else {
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mszh_dlen = mszh_decomp(encoded, len, c->decomp_buf, c->decomp_size);
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if (c->decomp_size != mszh_dlen) {
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av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n",
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c->decomp_size, mszh_dlen);
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return -1;
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}
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encoded = c->decomp_buf;
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len = mszh_dlen;
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}
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break;
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case COMP_MSZH_NOCOMP:
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
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return -1;
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}
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break;
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case CODEC_ID_ZLIB:
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#ifdef CONFIG_ZLIB
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/* Using the original dll with normal compression (-1) and RGB format
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* gives a file with ZLIB fourcc, but frame is really uncompressed.
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* To be sure that's true check also frame size */
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if ((c->compression == COMP_ZLIB_NORMAL) && (c->imgtype == IMGTYPE_RGB24) &&
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(len == width * height * 3))
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break;
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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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if (c->flags & FLAG_MULTITHREAD) {
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mthread_inlen = *((unsigned int*)encoded);
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mthread_outlen = *((unsigned int*)(encoded+4));
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if (mthread_outlen > c->decomp_size)
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mthread_outlen = c->decomp_size;
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c->zstream.next_in = encoded + 8;
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c->zstream.avail_in = mthread_inlen;
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c->zstream.next_out = c->decomp_buf;
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c->zstream.avail_out = c->decomp_size;
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zret = inflate(&(c->zstream), Z_FINISH);
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if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
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av_log(avctx, AV_LOG_ERROR, "Mthread1 inflate error: %d\n", zret);
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return -1;
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}
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if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
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av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%u != %lu)\n",
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mthread_outlen, c->zstream.total_out);
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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, "Mthread2 inflate reset error: %d\n", zret);
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return -1;
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}
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c->zstream.next_in = encoded + 8 + mthread_inlen;
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c->zstream.avail_in = len - mthread_inlen;
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c->zstream.next_out = c->decomp_buf + mthread_outlen;
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c->zstream.avail_out = c->decomp_size - mthread_outlen;
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zret = inflate(&(c->zstream), Z_FINISH);
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if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
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av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate error: %d\n", zret);
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return -1;
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}
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if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
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av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %lu)\n",
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mthread_outlen, c->zstream.total_out);
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return -1;
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}
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} else {
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c->zstream.next_in = encoded;
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c->zstream.avail_in = len;
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c->zstream.next_out = c->decomp_buf;
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c->zstream.avail_out = c->decomp_size;
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zret = inflate(&(c->zstream), Z_FINISH);
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if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
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av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
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return -1;
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}
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if (c->decomp_size != (unsigned int)(c->zstream.total_out)) {
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av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
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c->decomp_size, c->zstream.total_out);
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return -1;
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}
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}
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encoded = c->decomp_buf;
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len = c->decomp_size;
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#else
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av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
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return -1;
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#endif
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
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return -1;
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}
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/* Apply PNG filter */
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if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER)) {
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switch (c->imgtype) {
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case IMGTYPE_YUV111:
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case IMGTYPE_RGB24:
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for (row = 0; row < height; row++) {
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pixel_ptr = row * width * 3;
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yq = encoded[pixel_ptr++];
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uqvq = AV_RL16(encoded+pixel_ptr);
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pixel_ptr += 2;
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for (col = 1; col < width; col++) {
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encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
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uqvq -= AV_RL16(encoded+pixel_ptr+1);
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AV_WL16(encoded+pixel_ptr+1, uqvq);
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pixel_ptr += 3;
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}
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}
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break;
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case IMGTYPE_YUV422:
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for (row = 0; row < height; row++) {
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pixel_ptr = row * width * 2;
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yq = uq = vq =0;
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for (col = 0; col < width/4; col++) {
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encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
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encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
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encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
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encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
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encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
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encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
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encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
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encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
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pixel_ptr += 8;
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}
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}
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break;
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case IMGTYPE_YUV411:
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for (row = 0; row < height; row++) {
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pixel_ptr = row * width / 2 * 3;
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yq = uq = vq =0;
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for (col = 0; col < width/4; col++) {
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encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
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encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
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encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
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encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
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encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
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encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
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pixel_ptr += 6;
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}
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}
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break;
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case IMGTYPE_YUV211:
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for (row = 0; row < height; row++) {
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pixel_ptr = row * width * 2;
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yq = uq = vq =0;
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for (col = 0; col < width/2; col++) {
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encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
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encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
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encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
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encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
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pixel_ptr += 4;
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}
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}
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break;
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case IMGTYPE_YUV420:
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for (row = 0; row < height/2; row++) {
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pixel_ptr = row * width * 3;
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yq = y1q = uq = vq =0;
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for (col = 0; col < width/2; col++) {
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encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
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encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
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encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
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encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
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encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
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encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
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pixel_ptr += 6;
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}
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}
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n");
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return -1;
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}
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}
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/* Convert colorspace */
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switch (c->imgtype) {
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case IMGTYPE_YUV111:
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for (row = height - 1; row >= 0; row--) {
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pixel_ptr = row * c->pic.linesize[0];
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for (col = 0; col < width; col++) {
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outptr[pixel_ptr++] = get_b(encoded[0], encoded[1]);
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outptr[pixel_ptr++] = get_g(encoded[0], encoded[1], encoded[2]);
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outptr[pixel_ptr++] = get_r(encoded[0], encoded[2]);
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encoded += 3;
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}
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}
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break;
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case IMGTYPE_YUV422:
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for (row = height - 1; row >= 0; row--) {
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pixel_ptr = row * c->pic.linesize[0];
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for (col = 0; col < width/4; col++) {
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outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
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outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[6]);
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outptr[pixel_ptr++] = get_r(encoded[0], encoded[6]);
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outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
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outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[6]);
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outptr[pixel_ptr++] = get_r(encoded[1], encoded[6]);
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outptr[pixel_ptr++] = get_b(encoded[2], encoded[5]);
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outptr[pixel_ptr++] = get_g(encoded[2], encoded[5], encoded[7]);
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outptr[pixel_ptr++] = get_r(encoded[2], encoded[7]);
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outptr[pixel_ptr++] = get_b(encoded[3], encoded[5]);
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outptr[pixel_ptr++] = get_g(encoded[3], encoded[5], encoded[7]);
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outptr[pixel_ptr++] = get_r(encoded[3], encoded[7]);
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encoded += 8;
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}
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}
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break;
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case IMGTYPE_RGB24:
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for (row = height - 1; row >= 0; row--) {
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pixel_ptr = row * c->pic.linesize[0];
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for (col = 0; col < width; col++) {
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outptr[pixel_ptr++] = encoded[0];
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outptr[pixel_ptr++] = encoded[1];
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outptr[pixel_ptr++] = encoded[2];
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encoded += 3;
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}
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}
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break;
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case IMGTYPE_YUV411:
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for (row = height - 1; row >= 0; row--) {
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pixel_ptr = row * c->pic.linesize[0];
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for (col = 0; col < width/4; col++) {
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outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
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outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[5]);
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outptr[pixel_ptr++] = get_r(encoded[0], encoded[5]);
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outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
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outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[5]);
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outptr[pixel_ptr++] = get_r(encoded[1], encoded[5]);
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outptr[pixel_ptr++] = get_b(encoded[2], encoded[4]);
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outptr[pixel_ptr++] = get_g(encoded[2], encoded[4], encoded[5]);
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outptr[pixel_ptr++] = get_r(encoded[2], encoded[5]);
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outptr[pixel_ptr++] = get_b(encoded[3], encoded[4]);
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outptr[pixel_ptr++] = get_g(encoded[3], encoded[4], encoded[5]);
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outptr[pixel_ptr++] = get_r(encoded[3], encoded[5]);
|
|
encoded += 6;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_YUV211:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * c->pic.linesize[0];
|
|
for (col = 0; col < width/2; col++) {
|
|
outptr[pixel_ptr++] = get_b(encoded[0], encoded[2]);
|
|
outptr[pixel_ptr++] = get_g(encoded[0], encoded[2], encoded[3]);
|
|
outptr[pixel_ptr++] = get_r(encoded[0], encoded[3]);
|
|
outptr[pixel_ptr++] = get_b(encoded[1], encoded[2]);
|
|
outptr[pixel_ptr++] = get_g(encoded[1], encoded[2], encoded[3]);
|
|
outptr[pixel_ptr++] = get_r(encoded[1], encoded[3]);
|
|
encoded += 4;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_YUV420:
|
|
for (row = height / 2 - 1; row >= 0; row--) {
|
|
pixel_ptr = 2 * row * c->pic.linesize[0];
|
|
for (col = 0; col < width/2; col++) {
|
|
outptr[pixel_ptr] = get_b(encoded[0], encoded[4]);
|
|
outptr[pixel_ptr+1] = get_g(encoded[0], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr+2] = get_r(encoded[0], encoded[5]);
|
|
outptr[pixel_ptr+3] = get_b(encoded[1], encoded[4]);
|
|
outptr[pixel_ptr+4] = get_g(encoded[1], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr+5] = get_r(encoded[1], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]] = get_b(encoded[2], encoded[4]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+2] = get_r(encoded[2], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+3] = get_b(encoded[3], encoded[4]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+5] = get_r(encoded[3], encoded[5]);
|
|
pixel_ptr += 6;
|
|
encoded += 6;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
|
|
return -1;
|
|
}
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = c->pic;
|
|
|
|
/* always report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Init lcl decoder
|
|
*
|
|
*/
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
LclDecContext * const c = avctx->priv_data;
|
|
unsigned int basesize = avctx->width * avctx->height;
|
|
unsigned int max_basesize = ((avctx->width + 3) & ~3) * ((avctx->height + 3) & ~3);
|
|
unsigned int max_decomp_size;
|
|
int zret; // Zlib return code
|
|
|
|
c->pic.data[0] = NULL;
|
|
|
|
#ifdef CONFIG_ZLIB
|
|
// Needed if zlib unused or init aborted before inflateInit
|
|
memset(&(c->zstream), 0, sizeof(z_stream));
|
|
#endif
|
|
|
|
if (avctx->extradata_size < 8) {
|
|
av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
|
|
return 1;
|
|
}
|
|
|
|
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
|
|
return 1;
|
|
}
|
|
|
|
/* Check codec type */
|
|
if (((avctx->codec_id == CODEC_ID_MSZH) && (*((char *)avctx->extradata + 7) != CODEC_MSZH)) ||
|
|
((avctx->codec_id == CODEC_ID_ZLIB) && (*((char *)avctx->extradata + 7) != CODEC_ZLIB))) {
|
|
av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n");
|
|
}
|
|
|
|
/* Detect image type */
|
|
switch (c->imgtype = *((char *)avctx->extradata + 4)) {
|
|
case IMGTYPE_YUV111:
|
|
c->decomp_size = basesize * 3;
|
|
max_decomp_size = max_basesize * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 1:1:1.\n");
|
|
break;
|
|
case IMGTYPE_YUV422:
|
|
c->decomp_size = basesize * 2;
|
|
max_decomp_size = max_basesize * 2;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:2.\n");
|
|
break;
|
|
case IMGTYPE_RGB24:
|
|
c->decomp_size = basesize * 3;
|
|
max_decomp_size = max_basesize * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is RGB 24.\n");
|
|
break;
|
|
case IMGTYPE_YUV411:
|
|
c->decomp_size = basesize / 2 * 3;
|
|
max_decomp_size = max_basesize / 2 * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:1:1.\n");
|
|
break;
|
|
case IMGTYPE_YUV211:
|
|
c->decomp_size = basesize * 2;
|
|
max_decomp_size = max_basesize * 2;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 2:1:1.\n");
|
|
break;
|
|
case IMGTYPE_YUV420:
|
|
c->decomp_size = basesize / 2 * 3;
|
|
max_decomp_size = max_basesize / 2 * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:0.\n");
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
|
|
return 1;
|
|
}
|
|
|
|
/* Detect compression method */
|
|
c->compression = *((char *)avctx->extradata + 5);
|
|
switch (avctx->codec_id) {
|
|
case CODEC_ID_MSZH:
|
|
switch (c->compression) {
|
|
case COMP_MSZH:
|
|
av_log(avctx, AV_LOG_INFO, "Compression enabled.\n");
|
|
break;
|
|
case COMP_MSZH_NOCOMP:
|
|
c->decomp_size = 0;
|
|
av_log(avctx, AV_LOG_INFO, "No compression.\n");
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
|
|
return 1;
|
|
}
|
|
break;
|
|
case CODEC_ID_ZLIB:
|
|
#ifdef CONFIG_ZLIB
|
|
switch (c->compression) {
|
|
case COMP_ZLIB_HISPEED:
|
|
av_log(avctx, AV_LOG_INFO, "High speed compression.\n");
|
|
break;
|
|
case COMP_ZLIB_HICOMP:
|
|
av_log(avctx, AV_LOG_INFO, "High compression.\n");
|
|
break;
|
|
case COMP_ZLIB_NORMAL:
|
|
av_log(avctx, AV_LOG_INFO, "Normal compression.\n");
|
|
break;
|
|
default:
|
|
if ((c->compression < Z_NO_COMPRESSION) || (c->compression > Z_BEST_COMPRESSION)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
|
|
return 1;
|
|
}
|
|
av_log(avctx, AV_LOG_INFO, "Compression level for ZLIB: (%d).\n", c->compression);
|
|
}
|
|
#else
|
|
av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
|
|
return 1;
|
|
#endif
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Allocate decompression buffer */
|
|
if (c->decomp_size) {
|
|
if ((c->decomp_buf = av_malloc(max_decomp_size)) == NULL) {
|
|
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* Detect flags */
|
|
c->flags = *((char *)avctx->extradata + 6);
|
|
if (c->flags & FLAG_MULTITHREAD)
|
|
av_log(avctx, AV_LOG_INFO, "Multithread encoder flag set.\n");
|
|
if (c->flags & FLAG_NULLFRAME)
|
|
av_log(avctx, AV_LOG_INFO, "Nullframe insertion flag set.\n");
|
|
if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER))
|
|
av_log(avctx, AV_LOG_INFO, "PNG filter flag set.\n");
|
|
if (c->flags & FLAGMASK_UNUSED)
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags);
|
|
|
|
/* If needed init zlib */
|
|
if (avctx->codec_id == CODEC_ID_ZLIB) {
|
|
#ifdef CONFIG_ZLIB
|
|
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;
|
|
}
|
|
#else
|
|
av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
avctx->pix_fmt = PIX_FMT_BGR24;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Uninit lcl decoder
|
|
*
|
|
*/
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
|
{
|
|
LclDecContext * const c = avctx->priv_data;
|
|
|
|
if (c->pic.data[0])
|
|
avctx->release_buffer(avctx, &c->pic);
|
|
#ifdef CONFIG_ZLIB
|
|
inflateEnd(&(c->zstream));
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_MSZH_DECODER
|
|
AVCodec mszh_decoder = {
|
|
"mszh",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSZH,
|
|
sizeof(LclDecContext),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_ZLIB_DECODER
|
|
AVCodec zlib_decoder = {
|
|
"zlib",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ZLIB,
|
|
sizeof(LclDecContext),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|
|
#endif
|