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255 lines
6.1 KiB
255 lines
6.1 KiB
/*
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* export_mp2enc.c
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*
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* Georg Ludwig - January 2002
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*
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* Parts of export_wav and export_mpeg2enc used for this file
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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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#define MOD_NAME "export_mp2enc.so"
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#define MOD_VERSION "v1.0.11 (2006-03-16)"
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#define MOD_CODEC "(audio) MPEG 1/2"
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#include "transcode.h"
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#include "avilib/wavlib.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define CLAMP(x,l,h) x > h ? h : x < l ? l : x
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static int verbose_flag = TC_QUIET;
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static int capability_flag = TC_CAP_PCM;
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#define MOD_PRE mp2enc
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#include "export_def.h"
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static FILE* pFile = NULL;
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static WAV wav = NULL;
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/* ------------------------------------------------------------
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*
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* open outputfile
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*
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* ------------------------------------------------------------*/
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MOD_open
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{
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int verb;
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/* check for mp2enc */
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if (tc_test_program("mp2enc") != 0) return (TC_EXPORT_ERROR);
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if (param->flag == TC_AUDIO)
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{
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char buf [PATH_MAX];
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char mono[] = "-m";
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char stereo[] = "-s";
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int srate, brate;
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char *chan;
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int def_srate, def_brate;
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char *def_chan;
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verb = (verbose & TC_DEBUG) ? 2:0;
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srate = (vob->mp3frequency != 0) ? vob->mp3frequency : vob->a_rate;
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brate = vob->mp3bitrate;
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chan = (vob->dm_chan>=2) ? stereo : mono;
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def_srate = srate;
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def_brate = brate;
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def_chan = chan;
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// default profile values, authority: videohelp and dvdfaq
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switch(vob->mpeg_profile) {
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case VCD_PAL: case VCD_NTSC: case VCD:
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def_srate = 44100;
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def_brate = 224;
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def_chan = stereo;
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break;
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case SVCD_PAL: case SVCD_NTSC: case SVCD:
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def_srate = 44100;
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def_brate = CLAMP (brate, 64, 384);
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def_chan = stereo;
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break;
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case XVCD_PAL: case XVCD_NTSC: case XVCD:
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// check for invalid sample rate
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if ((srate != 32000) && (srate != 44100) && (srate != 48000))
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def_srate = 44100;
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// don't change if valid rate
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def_brate = CLAMP (brate, 64, 384);
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def_chan = stereo;
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break;
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case DVD_PAL: case DVD_NTSC: case DVD:
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def_srate = 48000;
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def_brate = CLAMP (brate, 64, 384);
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def_chan = stereo;
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case PROF_NONE:
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break;
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}
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// encoding values, let commandline override profile
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if(!(vob->export_attributes & TC_EXPORT_ATTRIBUTE_ARATE))
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if (srate != def_srate) {
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tc_log_info(MOD_NAME, "export profile changed samplerate:"
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" %d -> %d Hz.", srate, def_srate);
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srate = def_srate;
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}
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if(!(vob->export_attributes & TC_EXPORT_ATTRIBUTE_ABITRATE))
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if (brate != def_brate) {
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tc_log_info(MOD_NAME, "export profile changed bitrate: "
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"%d -> %d kbps.", brate, def_brate);
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brate = def_brate;
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}
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if(!(vob->export_attributes & TC_EXPORT_ATTRIBUTE_ACHANS))
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if (chan != def_chan) {
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tc_log_info(MOD_NAME, "export profile changed channels: "
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"mono -> stereo.");
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chan = def_chan;
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}
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if(tc_snprintf(buf, PATH_MAX, "mp2enc -v %d -r %d -b %d %s -o \"%s\" %s", verb, srate, brate, chan, vob->audio_out_file, (vob->ex_a_string?vob->ex_a_string:"")) < 0) {
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tc_log_perror(MOD_NAME, "cmd buffer overflow");
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return(TC_EXPORT_ERROR);
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}
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if(verbose & TC_INFO) tc_log_info(MOD_NAME, "(%d/%d) cmd=%s",
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(int)strlen(buf), PATH_MAX, buf);
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if((pFile = popen (buf, "w")) == NULL)
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return(TC_EXPORT_ERROR);
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wav = wav_fdopen(fileno(pFile), WAV_WRITE|WAV_PIPE, NULL);
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if (wav == NULL) {
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tc_log_perror(MOD_NAME, "open wave stream");
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return TC_EXPORT_ERROR;
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}
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wav_set_rate(wav, vob->a_rate);
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wav_set_bitrate(wav, vob->dm_chan*vob->a_rate*vob->dm_bits/8);
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wav_set_channels(wav, vob->dm_chan);
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wav_set_bits(wav, vob->dm_bits);
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return(0);
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}
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if (param->flag == TC_VIDEO)
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return(0);
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// invalid flag
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return(TC_EXPORT_ERROR);
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}
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/* ------------------------------------------------------------
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*
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* init codec
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*
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* ------------------------------------------------------------*/
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MOD_init
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{
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if(param->flag == TC_AUDIO)
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{
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return(0);
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}
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if (param->flag == TC_VIDEO)
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return(0);
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// invalid flag
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return(TC_EXPORT_ERROR);
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}
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/* ------------------------------------------------------------
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*
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* encode and export frame
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*
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* ------------------------------------------------------------*/
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MOD_encode
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{
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if(param->flag == TC_AUDIO)
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{
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if (wav_write_data(wav, param->buffer, param->size) != param->size)
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{
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tc_log_perror(MOD_NAME, "write audio frame");
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return(TC_EXPORT_ERROR);
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}
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return (0);
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}
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if (param->flag == TC_VIDEO)
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return(0);
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// invalid flag
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return(TC_EXPORT_ERROR);
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}
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/* ------------------------------------------------------------
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*
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* stop encoder
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*
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* ------------------------------------------------------------*/
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MOD_stop
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{
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if (param->flag == TC_VIDEO)
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return (0);
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if (param->flag == TC_AUDIO)
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return (0);
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return(TC_EXPORT_ERROR);
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}
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/* ------------------------------------------------------------
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*
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* close codec
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*
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* ------------------------------------------------------------*/
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MOD_close
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{
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if (param->flag == TC_VIDEO)
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return (0);
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if (param->flag == TC_AUDIO)
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{
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if (wav != NULL) {
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wav_close(wav);
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wav = NULL;
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}
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if (pFile != NULL) {
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pclose (pFile);
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pFile = NULL;
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}
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return(0);
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}
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return (TC_EXPORT_ERROR);
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}
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