mtk-lk/lib/libshowlogo/decompress_common.c

/* Copyright Statement:
 *
 * This software/firmware and related documentation ("MediaTek Software") are
 * protected under relevant copyright laws. The information contained herein
 * is confidential and proprietary to MediaTek Inc. and/or its licensors.
 * Without the prior written permission of MediaTek inc. and/or its licensors,
 * any reproduction, modification, use or disclosure of MediaTek Software,
 * and information contained herein, in whole or in part, shall be strictly prohibited.
 */
/* MediaTek Inc. (C) 2010. All rights reserved.
 *
 * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
 * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
 * RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
 * AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
 * NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
 * SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
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 * SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
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 * AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
 * OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
 * MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
 *
 * The following software/firmware and/or related documentation ("MediaTek Software")
 * have been modified by MediaTek Inc. All revisions are subject to any receiver's
 * applicable license agreements with MediaTek Inc.
 */



#include <stdio.h>
#include <string.h>
#include "show_logo_log.h"


/* Decompress zlib compressed file */

int decompress_logo(void *in, void *out, int inlen, int outlen)
{
    LOG_ANIM("[decompress_logo %s %d]in=0x%08x, out=0x%08x, inlen=%d, logolen=%d\n",__FUNCTION__,__LINE__,
                (unsigned int)in, (unsigned int)out, inlen, outlen);
    int ret;
    int have = 0;
    z_stream strm;

    memset(&strm, 0, sizeof(z_stream));
    /* allocate inflate state */
    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    strm.avail_in = 0;
    strm.next_in = Z_NULL;
    ret = inflateInit(&strm);
    if (ret != Z_OK)
        return ret;

    /* decompress until deflate stream ends or end of file */
    do {
        strm.avail_in = inlen;

        if (strm.avail_in <= 0)
        {
            LOG_ANIM("[decompress_logo %s %d]strm.avail_in <= 0\n",__FUNCTION__,__LINE__);
            break;
        }
        strm.next_in = (Bytef*)in;

        /* run inflate() on input until output buffer not full */
        do {
            strm.avail_out = outlen;
            strm.next_out = (Bytef*)out;
            ret = inflate(&strm, Z_NO_FLUSH);
            switch (ret) {
            case Z_NEED_DICT:
                ret = Z_DATA_ERROR;     /* and fall through */
            case Z_DATA_ERROR:
            case Z_MEM_ERROR:
                 LOG_ANIM("[decompress_logo %s %d]Z_DATA_ERROR or Z_MEM_ERROR\n",__FUNCTION__,__LINE__);
                (void)inflateEnd(&strm);
                return ret;
            }
            have += outlen - strm.avail_out;
        } while (strm.avail_out == 0);

        /* done when inflate() says it's done */
    } while (ret != Z_STREAM_END);
    if (ret == Z_STREAM_END)
    /* clean up and return */
    (void)inflateEnd(&strm);
    LOG_ANIM("[decompress_logo %s %d]have=%d\n",__FUNCTION__,__LINE__,have);

    //return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
    return have;
}