144 lines
4.1 KiB
C++
144 lines
4.1 KiB
C++
/* -*- c++ -*- */
|
|
/*
|
|
* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
|
|
*
|
|
* Copyright (C) 2017, Libre Space Foundation <http://librespacefoundation.org/>
|
|
*
|
|
* 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <gnuradio/io_signature.h>
|
|
#include <vorbis/codec.h>
|
|
#include <vorbis/vorbisfile.h>
|
|
#include <volk/volk.h>
|
|
|
|
#include <satnogs/log.h>
|
|
#include "ogg_source_impl.h"
|
|
|
|
#define PCM_BUF_SIZE 4096
|
|
|
|
namespace gr {
|
|
namespace satnogs {
|
|
|
|
ogg_source::sptr
|
|
ogg_source::make(const std::string &filename, int channels, bool repeat)
|
|
{
|
|
return gnuradio::get_initial_sptr(
|
|
new ogg_source_impl(filename, channels, repeat));
|
|
}
|
|
|
|
/*
|
|
* The private constructor
|
|
*/
|
|
ogg_source_impl::ogg_source_impl(const std::string &filename,
|
|
int channels, bool repeat) :
|
|
gr::sync_block(
|
|
"ogg_source", gr::io_signature::make(0, 0, 0),
|
|
gr::io_signature::make(channels, channels, sizeof(float))),
|
|
d_channels(channels),
|
|
d_repeat(repeat)
|
|
{
|
|
if (channels < 1) {
|
|
throw std::invalid_argument("At least one output channels should"
|
|
" be specified");
|
|
}
|
|
|
|
if (ov_fopen(filename.c_str(), &d_ogvorb_f) < 0) {
|
|
throw std::invalid_argument("Invalid .ogg file");
|
|
}
|
|
|
|
vorbis_info *vi = ov_info(&d_ogvorb_f, -1);
|
|
if (vi->channels != (int) channels) {
|
|
throw std::invalid_argument(
|
|
std::string("Channels number specified (")
|
|
+ std::to_string(channels)
|
|
+ ") does not match the channels of "
|
|
"the ogg stream (" + std::to_string(vi->channels) + ")");
|
|
}
|
|
|
|
const int alignment_multiple = volk_get_alignment() / sizeof(float);
|
|
set_alignment(std::max(1, alignment_multiple));
|
|
set_max_noutput_items(PCM_BUF_SIZE);
|
|
|
|
d_in_buffer = (int16_t *) volk_malloc(PCM_BUF_SIZE * sizeof(int16_t),
|
|
volk_get_alignment());
|
|
d_out_buffer = (float *) volk_malloc(PCM_BUF_SIZE * sizeof(float),
|
|
volk_get_alignment());
|
|
if (!d_in_buffer || !d_out_buffer) {
|
|
throw std::runtime_error("Could not allocate memory");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Our virtual destructor.
|
|
*/
|
|
ogg_source_impl::~ogg_source_impl()
|
|
{
|
|
ov_clear(&d_ogvorb_f);
|
|
volk_free(d_in_buffer);
|
|
volk_free(d_out_buffer);
|
|
}
|
|
|
|
int
|
|
ogg_source_impl::work(int noutput_items,
|
|
gr_vector_const_void_star &input_items,
|
|
gr_vector_void_star &output_items)
|
|
{
|
|
long int ret;
|
|
int section = 0;
|
|
int available = (noutput_items / d_channels);
|
|
int available_samples = 0;
|
|
int produced = 0;
|
|
|
|
ret = ov_read(&d_ogvorb_f, (char *)d_in_buffer,
|
|
available * sizeof(int16_t),
|
|
0, sizeof(int16_t), 1, §ion);
|
|
if (ret <= 0) {
|
|
/*
|
|
* If return value is EOF and the repeat mode is set seek back to the
|
|
* start of the ogg stream
|
|
*/
|
|
if (ret == 0 && d_repeat) {
|
|
if (ov_seekable(&d_ogvorb_f)) {
|
|
ov_time_seek(&d_ogvorb_f, 0);
|
|
return 0;
|
|
}
|
|
LOG_WARN("File is not seakable.");
|
|
}
|
|
return WORK_DONE;
|
|
}
|
|
|
|
available_samples = ret / sizeof(int16_t);
|
|
/* Convert to float the signed-short audio samples */
|
|
volk_16i_s32f_convert_32f(d_out_buffer, d_in_buffer, 2 << 15,
|
|
available_samples);
|
|
|
|
/* De-interleave the available channels */
|
|
for (int i = 0; i < available_samples; i += d_channels, produced++) {
|
|
for (int chan = 0; chan < d_channels; chan++) {
|
|
((float *)output_items[chan])[produced] = d_out_buffer[i * d_channels + chan];
|
|
}
|
|
}
|
|
|
|
return produced;
|
|
}
|
|
|
|
} /* namespace satnogs */
|
|
} /* namespace gr */
|
|
|