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/*
* export_lame.c
*
* Copyright (C) Thomas Oestreich - November 2002
*
* This file is part of transcode, a video stream processing tool
*
* transcode is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* transcode is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#define MOD_NAME "export_lame.so"
#define MOD_VERSION "v0.0.3 (2003-03-06)"
#define MOD_CODEC "(audio) MPEG 1/2"
#include "transcode.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
static int verbose_flag = TC_QUIET;
static int capability_flag = TC_CAP_PCM;
#define MOD_PRE lame
#include "export_def.h"
static FILE* pFile = NULL;
/* ------------------------------------------------------------
*
* Pipe write helper function
*
* ------------------------------------------------------------*/
static int p_write (char *buf, size_t len)
{
size_t n = 0;
size_t r = 0;
int fd = fileno (pFile);
while (r < len)
{
if ((n = write (fd, buf + r, len - r)) < 0)
return n;
r += n;
}
return r;
}
/* ------------------------------------------------------------
*
* open outputfile
*
* ------------------------------------------------------------*/
MOD_open
{
/* check for lame */
if (tc_test_program("lame") != 0) return (TC_EXPORT_ERROR);
if (param->flag == TC_AUDIO) {
char buf [PATH_MAX];
int ifreq,ofreq,orate;
int verb;
int ofreq_int;
int ofreq_dec;
int ochan;
char chan;
char *ptr;
const char * swap_bytes = "";
char br[64];
/* verbose? */
verb = (verbose & TC_DEBUG) ? 2:0;
/* fetch audio parameter */
ofreq = vob->mp3frequency;
ifreq = vob->a_rate;
orate = vob->mp3bitrate;
ochan = vob->dm_chan;
chan = (ochan==2) ? 'j':'m';
/* default out freq */
if(ofreq==0)
ofreq = ifreq;
/* need conversion? */
if(ofreq!=ifreq) {
/* add sox for conversion */
if (tc_test_program("sox") != 0) {
return(TC_EXPORT_ERROR);
} else {
tc_snprintf(buf, sizeof(buf), "sox %s -r %d -c %d -t raw - -r %d -t raw - polyphase "
"2>/dev/null | ",
(vob->dm_bits==16)?"-w -s":"-b -u",
ifreq, ochan, ofreq);
ptr = buf + strlen(buf);
}
} else {
ptr = buf;
}
/* convert output frequency to fixed point */
ofreq_int = ofreq/1000.0;
ofreq_dec = ofreq-ofreq_int*1000;
/* lame command line */
#if !defined(WORDS_BIGENDIAN)
swap_bytes = "-x";
#endif
switch(vob->a_vbr) {
case 1:
tc_snprintf(br, sizeof(br), "--abr %d", orate);
break;
case 2:
tc_snprintf(br, sizeof(br), "--vbr-new -b %d -B %d -V %d", orate-64, orate+64, (int) vob->mp3quality);
break;
case 3:
tc_snprintf(br, sizeof(br), "--r3mix");
break;
default:
tc_snprintf(br, sizeof(br), "--cbr -b %d", orate);
break;
}
/* ptr is a pointer into buf */
tc_snprintf(ptr, sizeof(buf) - (ptr-buf),
"lame %s %s -s %d.%03d -m %c - \"%s.mp3\" 2>/dev/null %s",
swap_bytes, br, ofreq_int, ofreq_dec, chan,
vob->audio_out_file, (vob->ex_a_string?vob->ex_a_string:""));
tc_log_info (MOD_NAME, "%s", buf);
if ((pFile = popen (buf, "w")) == NULL)
return(TC_EXPORT_ERROR);
return(0);
}
if (param->flag == TC_VIDEO)
return(0);
// invalid flag
return(TC_EXPORT_ERROR);
}
/* ------------------------------------------------------------
*
* init codec
*
* ------------------------------------------------------------*/
MOD_init
{
if(param->flag == TC_AUDIO)
{
return(0);
}
if (param->flag == TC_VIDEO)
return(0);
// invalid flag
return(TC_EXPORT_ERROR);
}
/* ------------------------------------------------------------
*
* encode and export frame
*
* ------------------------------------------------------------*/
MOD_encode
{
if(param->flag == TC_AUDIO)
{
if (p_write (param->buffer, param->size) != param->size)
{
tc_log_perror(MOD_NAME, "write audio frame");
return(TC_EXPORT_ERROR);
}
return (0);
}
if (param->flag == TC_VIDEO)
return(0);
// invalid flag
return(TC_EXPORT_ERROR);
}
/* ------------------------------------------------------------
*
* stop encoder
*
* ------------------------------------------------------------*/
MOD_stop
{
if (param->flag == TC_VIDEO)
return (0);
if (param->flag == TC_AUDIO)
return (0);
return(TC_EXPORT_ERROR);
}
/* ------------------------------------------------------------
*
* close codec
*
* ------------------------------------------------------------*/
MOD_close
{
if (param->flag == TC_VIDEO)
return (0);
if (param->flag == TC_AUDIO)
{
if (pFile)
pclose (pFile);
pFile = NULL;
return(0);
}
return (TC_EXPORT_ERROR);
}
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