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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 <iostream>
#include <boost/shared_ptr.hpp>
#include "ab_transcoder.h"
#include "film.h"
#include "decoder.h"
#include "encoder.h"
#include "job.h"
#include "options.h"
#include "image.h"
#include "decoder_factory.h"
/** @file src/ab_transcoder.cc
* @brief A transcoder which uses one Film for the left half of the screen, and a different one
* for the right half (to facilitate A/B comparisons of settings)
*/
using std::string;
using boost::shared_ptr;
/** @param a Film to use for the left half of the screen.
* @param b Film to use for the right half of the screen.
* @param o Options.
* @param j Job that we are associated with.
* @param e Encoder to use.
*/
ABTranscoder::ABTranscoder (
shared_ptr<Film> a, shared_ptr<Film> b, shared_ptr<const Options> o, Job* j, shared_ptr<Encoder> e)
: _film_a (a)
, _film_b (b)
, _opt (o)
, _job (j)
, _encoder (e)
, _last_frame (0)
{
_da = decoder_factory (_film_a, o, j);
_db = decoder_factory (_film_b, o, j);
_da->Video.connect (bind (&ABTranscoder::process_video, this, _1, _2, _3, 0));
_db->Video.connect (bind (&ABTranscoder::process_video, this, _1, _2, _3, 1));
_da->Audio.connect (bind (&Encoder::process_audio, e, _1));
}
ABTranscoder::~ABTranscoder ()
{
}
void
ABTranscoder::process_video (shared_ptr<Image> yuv, int frame, shared_ptr<Subtitle> sub, int index)
{
if (index == 0) {
/* Keep this image around until we get the other half */
_image = yuv;
} else {
/* Copy the right half of yuv into _image */
for (int i = 0; i < yuv->components(); ++i) {
int const line_size = yuv->line_size()[i];
int const half_line_size = line_size / 2;
int const stride = yuv->stride()[i];
uint8_t* p = _image->data()[i];
uint8_t* q = yuv->data()[i];
for (int j = 0; j < yuv->lines (i); ++j) {
memcpy (p + half_line_size, q + half_line_size, half_line_size);
p += stride;
q += stride;
}
}
/* And pass it to the encoder */
_encoder->process_video (_image, frame, sub);
_image.reset ();
}
_last_frame = frame;
}
void
ABTranscoder::go ()
{
_encoder->process_begin (_da->audio_channel_layout());
_da->process_begin ();
_db->process_begin ();
while (1) {
bool const a = _da->pass ();
bool const b = _db->pass ();
if (a && b) {
break;
}
}
_encoder->process_end ();
_da->process_end ();
_db->process_end ();
}
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