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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program 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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdexcept>
#include <iostream>
#include <iomanip>
#include <getopt.h>
#include <sndfile.h>
#include <boost/filesystem.hpp>
#include "lib/film.h"
#include "lib/cross.h"
using namespace std;
using namespace boost;
void
help (string n)
{
cerr << "Syntax: " << n << " [--help] [--chop-audio-start] [--chop-audio-end] --film <film>\n";
}
void
sox (vector<string> const & audio_files, string const & process)
{
for (vector<string>::const_iterator i = audio_files.begin(); i != audio_files.end(); ++i) {
stringstream cmd;
cmd << "sox \"" << *i << "\" -t wav \"" << *i << ".tmp\" " << process;
cout << "> " << cmd.str() << "\n";
int r = ::system (cmd.str().c_str());
if (r == -1 || WEXITSTATUS (r) != 0) {
cerr << "fixlengths: call to sox failed.\n";
exit (EXIT_FAILURE);
}
filesystem::rename (*i + ".tmp", *i);
}
}
int main (int argc, char* argv[])
{
string film_dir;
bool chop_audio_start = false;
bool chop_audio_end = false;
bool pad_audio_end = false;
while (1) {
static struct option long_options[] = {
{ "help", no_argument, 0, 'h' },
{ "chop-audio-start", no_argument, 0, 'c' },
{ "chop-audio-end", no_argument, 0, 'd' },
{ "pad-audio-end", no_argument, 0, 'p' },
{ "film", required_argument, 0, 'f' },
{ 0, 0, 0, 0 }
};
int option_index = 0;
int c = getopt_long (argc, argv, "hcf:", long_options, &option_index);
if (c == -1) {
break;
}
switch (c) {
case 'h':
help (argv[0]);
exit (EXIT_SUCCESS);
case 'c':
chop_audio_start = true;
break;
case 'd':
chop_audio_end = true;
break;
case 'p':
pad_audio_end = true;
break;
case 'f':
film_dir = optarg;
break;
}
}
if (film_dir.empty ()) {
help (argv[0]);
exit (EXIT_FAILURE);
}
dvdomatic_setup ();
Film* film = 0;
try {
film = new Film (film_dir, true);
} catch (std::exception& e) {
cerr << argv[0] << ": error reading film `" << film_dir << "' (" << e.what() << ")\n";
exit (EXIT_FAILURE);
}
/* XXX: hack */
int video_frames = 0;
for (filesystem::directory_iterator i = filesystem::directory_iterator (film->j2k_dir()); i != filesystem::directory_iterator(); ++i) {
++video_frames;
}
float const video_length = video_frames / film->frames_per_second();
cout << "Video length: " << video_length << " (" << video_frames << " frames at " << film->frames_per_second() << " frames per second).\n";
vector<string> audio_files = film->audio_files ();
if (audio_files.empty ()) {
cerr << argv[0] << ": film has no audio files.\n";
exit (EXIT_FAILURE);
}
sf_count_t audio_frames = 0;
int audio_sample_rate = 0;
for (vector<string>::iterator i = audio_files.begin(); i != audio_files.end(); ++i) {
SF_INFO info;
info.format = 0;
SNDFILE* sf = sf_open (i->c_str(), SFM_READ, &info);
if (sf == 0) {
cerr << argv[0] << ": could not open WAV file for reading.\n";
exit (EXIT_FAILURE);
}
if (audio_frames == 0) {
audio_frames = info.frames;
}
if (audio_sample_rate == 0) {
audio_sample_rate = info.samplerate;
}
if (audio_frames != info.frames) {
cerr << argv[0] << ": audio files have differing lengths.\n";
exit (EXIT_FAILURE);
}
if (audio_sample_rate != info.samplerate) {
cerr << argv[0] << ": audio files have differing sample rates.\n";
exit (EXIT_FAILURE);
}
sf_close (sf);
}
float const audio_length = audio_frames / float (audio_sample_rate);
cout << "Audio length: " << audio_length << " (" << audio_frames << " frames at " << audio_sample_rate << " frames per second).\n";
cout << "\n";
if (audio_length > video_length) {
cout << setprecision (3);
cout << "Audio " << (audio_length - video_length) << "s longer than video.\n";
float const delta = audio_length - video_length;
int const delta_samples = delta * audio_sample_rate;
if (chop_audio_start) {
cout << "Chopping difference off the start of the audio.\n";
stringstream s;
s << "trim " << delta_samples << "s";
sox (audio_files, s.str ());
} else if (chop_audio_end) {
cout << "Chopping difference off the end of the audio.\n";
stringstream s;
s << "reverse trim " << delta_samples << "s reverse";
sox (audio_files, s.str ());
} else {
cout << "Re-run with --chop-audio-start or --chop-audio-end, perhaps.\n";
}
} else if (audio_length < video_length) {
cout << setprecision (3);
cout << "Audio " << (video_length - audio_length) << "s shorter than video.\n";
if (pad_audio_end) {
float const delta = video_length - audio_length;
int const delta_samples = delta * audio_sample_rate;
stringstream s;
s << "pad 0 " << delta_samples << "s";
sox (audio_files, s.str ());
} else {
cout << "Re-run with --pad-audio-end, perhaps.\n";
}
}
return 0;
}
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