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145 lines
3.5 KiB
145 lines
3.5 KiB
/*
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* decode_lzo.c
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*
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* Copyright (C) Tilmann Bitterberg - 2003
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*
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* This file is part of transcode, a video stream processing tool
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*
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* transcode is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* transcode 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Make; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include "transcode.h"
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#include "libtc/libtc.h"
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#include "tcinfo.h"
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#include "ioaux.h"
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#include "avilib/avilib.h"
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#include "tc.h"
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#ifdef HAVE_LZO
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#include "libtc/tc_lzo.h"
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#define MOD_NAME "decode_lzo"
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#define BUFFER_SIZE SIZE_RGB_FRAME<<1
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static int r;
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static lzo_byte *out;
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static lzo_byte *inbuf;
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static lzo_byte *wrkmem;
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static lzo_uint out_len;
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inline static void str2long(unsigned char *bb, long *bytes)
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{
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*bytes = (bb[0]<<24) | (bb[1]<<16) | (bb[2]<<8) | (bb[3]);
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}
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void decode_lzo(decode_t *decode)
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{
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long bytes;
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ssize_t ss;
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tc_lzo_header_t h;
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/*
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* Step 1: initialize the LZO library
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*/
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if (lzo_init() != LZO_E_OK) {
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tc_log_error(__FILE__, "lzo_init() failed");
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goto decoder_error;
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}
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wrkmem = (lzo_bytep) lzo_malloc(LZO1X_1_MEM_COMPRESS);
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out = (lzo_bytep) lzo_malloc(BUFFER_SIZE);
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inbuf = (lzo_bytep) lzo_malloc(BUFFER_SIZE);
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if (wrkmem == NULL || out == NULL) {
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tc_log_error(__FILE__, "out of memory");
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goto decoder_error;
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}
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r = 0;
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out_len = 0;
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verbose = decode->verbose;
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for (;;) {
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if ( (ss=tc_pread (decode->fd_in, (uint8_t *)&h, sizeof(h))) != sizeof(h)) {
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//tc_log_msg(__FILE__, "failed to read frame size: EOF. expected (%ld) got (%d)", 4L, ss);
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goto decoder_out;
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}
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// check magic
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if (h.magic != TC_CODEC_LZO2) {
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tc_log_error(__FILE__, "Wrong stream magic: expected (0x%x) got (0x%x)", TC_CODEC_LZO2, h.magic);
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goto decoder_error;
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}
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//str2long(bb, &bytes);
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bytes = h.size;
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if (verbose & TC_DEBUG)
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tc_log_msg(__FILE__, "got bytes (%ld)", bytes);
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if ( (ss=tc_pread (decode->fd_in, inbuf, bytes))!=bytes) {
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tc_log_error(__FILE__, "failed to read frame: expected (%ld) got (%lu)", bytes, (unsigned long)ss);
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goto decoder_error;
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}
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if (h.flags & TC_LZO_NOT_COMPRESSIBLE) {
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ac_memcpy(out, inbuf, bytes);
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out_len = bytes;
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r = LZO_E_OK;
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} else {
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r = lzo1x_decompress(inbuf, bytes, out, &out_len, wrkmem);
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}
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if (r == LZO_E_OK) {
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if(verbose & TC_DEBUG)
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tc_log_msg(__FILE__, "decompressed %lu bytes into %lu bytes",
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(long) bytes, (long) out_len);
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} else {
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/* this should NEVER happen */
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tc_log_error(__FILE__, "internal error - decompression failed: %d", r);
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goto decoder_error;
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}
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if ( (ss = tc_pwrite (decode->fd_out, out, out_len)) != out_len) {
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tc_log_error(__FILE__, "failed to write frame: expected (%ld) wrote (%lu)", bytes, (unsigned long)ss);
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goto decoder_error;
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}
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}
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decoder_out:
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import_exit(0);
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decoder_error:
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import_exit(1);
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}
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#else /* HAVE_LZO */
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void decode_lzo(decode_t *decode)
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{
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tc_log_error(__FILE__, "No support for LZO configured -- exiting");
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import_exit(1);
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}
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#endif /* HAVE_LZO */
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