diff options
Diffstat (limited to 'gr-audio/lib/oss')
| -rw-r--r-- | gr-audio/lib/oss/audio_oss_sink.cc | 161 | ||||
| -rw-r--r-- | gr-audio/lib/oss/audio_oss_sink.h | 54 | ||||
| -rw-r--r-- | gr-audio/lib/oss/audio_oss_source.cc | 177 | ||||
| -rw-r--r-- | gr-audio/lib/oss/audio_oss_source.h | 58 | ||||
| -rw-r--r-- | gr-audio/lib/oss/gr-audio-oss.conf | 9 |
5 files changed, 459 insertions, 0 deletions
diff --git a/gr-audio/lib/oss/audio_oss_sink.cc b/gr-audio/lib/oss/audio_oss_sink.cc new file mode 100644 index 000000000..a33e569f6 --- /dev/null +++ b/gr-audio/lib/oss/audio_oss_sink.cc @@ -0,0 +1,161 @@ +/* -*- c++ -*- */ +/* + * Copyright 2004-2011 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio 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, or (at your option) + * any later version. + * + * GNU Radio 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 Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "gr_audio_registry.h" +#include <audio_oss_sink.h> +#include <gr_io_signature.h> +#include <gr_prefs.h> +#include <sys/soundcard.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdio.h> +#include <iostream> +#include <stdexcept> + +AUDIO_REGISTER_SINK(oss)( + int sampling_rate, const std::string &device_name, bool ok_to_block +){ + return audio_sink::sptr(new audio_oss_sink(sampling_rate, device_name, ok_to_block)); +} + +static std::string +default_device_name () +{ + return gr_prefs::singleton()->get_string("audio_oss", "default_output_device", "/dev/dsp"); +} + +audio_oss_sink::audio_oss_sink (int sampling_rate, + const std::string device_name, + bool ok_to_block) + : audio_sink ("audio_oss_sink", + gr_make_io_signature (1, 2, sizeof (float)), + gr_make_io_signature (0, 0, 0)), + d_sampling_rate (sampling_rate), + d_device_name (device_name.empty() ? default_device_name() : device_name), + d_fd (-1), d_buffer (0), d_chunk_size (0) +{ + if ((d_fd = open (d_device_name.c_str (), O_WRONLY)) < 0){ + fprintf (stderr, "audio_oss_sink: "); + perror (d_device_name.c_str ()); + throw std::runtime_error ("audio_oss_sink"); + } + + double CHUNK_TIME = + std::max(0.001, gr_prefs::singleton()->get_double("audio_oss", "latency", 0.005)); + + d_chunk_size = (int) (d_sampling_rate * CHUNK_TIME); + set_output_multiple (d_chunk_size); + + d_buffer = new short [d_chunk_size * 2]; + + int format = AFMT_S16_NE; + int orig_format = format; + if (ioctl (d_fd, SNDCTL_DSP_SETFMT, &format) < 0){ + std::cerr << "audio_oss_sink: " << d_device_name << " ioctl failed\n"; + perror (d_device_name.c_str ()); + throw std::runtime_error ("audio_oss_sink"); + } + + if (format != orig_format){ + fprintf (stderr, "audio_oss_sink: unable to support format %d\n", orig_format); + fprintf (stderr, " card requested %d instead.\n", format); + } + + // set to stereo no matter what. Some hardware only does stereo + int channels = 2; + if (ioctl (d_fd, SNDCTL_DSP_CHANNELS, &channels) < 0 || channels != 2){ + perror ("audio_oss_sink: could not set STEREO mode"); + throw std::runtime_error ("audio_oss_sink"); + } + + // set sampling freq + int sf = sampling_rate; + if (ioctl (d_fd, SNDCTL_DSP_SPEED, &sf) < 0){ + std::cerr << "audio_oss_sink: " + << d_device_name << ": invalid sampling_rate " + << sampling_rate << "\n"; + sampling_rate = 8000; + if (ioctl (d_fd, SNDCTL_DSP_SPEED, &sf) < 0){ + std::cerr << "audio_oss_sink: failed to set sampling_rate to 8000\n"; + throw std::runtime_error ("audio_oss_sink"); + } + } +} + +audio_oss_sink::~audio_oss_sink () +{ + close (d_fd); + delete [] d_buffer; +} + + +int +audio_oss_sink::work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const float *f0, *f1; + + switch (input_items.size ()){ + + case 1: // mono input + + f0 = (const float *) input_items[0]; + + for (int i = 0; i < noutput_items; i += d_chunk_size){ + for (int j = 0; j < d_chunk_size; j++){ + d_buffer[2*j+0] = (short) (f0[j] * 32767); + d_buffer[2*j+1] = (short) (f0[j] * 32767); + } + f0 += d_chunk_size; + if (write (d_fd, d_buffer, 2 * d_chunk_size * sizeof (short)) < 0) + perror ("audio_oss_sink: write"); + } + break; + + case 2: // stereo input + + f0 = (const float *) input_items[0]; + f1 = (const float *) input_items[1]; + + for (int i = 0; i < noutput_items; i += d_chunk_size){ + for (int j = 0; j < d_chunk_size; j++){ + d_buffer[2*j+0] = (short) (f0[j] * 32767); + d_buffer[2*j+1] = (short) (f1[j] * 32767); + } + f0 += d_chunk_size; + f1 += d_chunk_size; + if (write (d_fd, d_buffer, 2 * d_chunk_size * sizeof (short)) < 0) + perror ("audio_oss_sink: write"); + } + break; + } + + return noutput_items; +} diff --git a/gr-audio/lib/oss/audio_oss_sink.h b/gr-audio/lib/oss/audio_oss_sink.h new file mode 100644 index 000000000..0d7280c2f --- /dev/null +++ b/gr-audio/lib/oss/audio_oss_sink.h @@ -0,0 +1,54 @@ +/* -*- c++ -*- */ +/* + * Copyright 2004-2011 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio 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, or (at your option) + * any later version. + * + * GNU Radio 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 Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_AUDIO_OSS_SINK_H +#define INCLUDED_AUDIO_OSS_SINK_H + +#include <gr_audio_sink.h> +#include <string> + +/*! + * \brief audio sink using OSS + * + * input signature is one or two streams of floats. + * Input samples must be in the range [-1,1]. + */ + +class audio_oss_sink : public audio_sink { + + int d_sampling_rate; + std::string d_device_name; + int d_fd; + short *d_buffer; + int d_chunk_size; + +public: + audio_oss_sink (int sampling_rate, const std::string device_name = "", bool ok_to_block = true); + + ~audio_oss_sink (); + + int work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_AUDIO_OSS_SINK_H */ diff --git a/gr-audio/lib/oss/audio_oss_source.cc b/gr-audio/lib/oss/audio_oss_source.cc new file mode 100644 index 000000000..f52af1bb8 --- /dev/null +++ b/gr-audio/lib/oss/audio_oss_source.cc @@ -0,0 +1,177 @@ +/* -*- c++ -*- */ +/* + * Copyright 2004-2011 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio 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, or (at your option) + * any later version. + * + * GNU Radio 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 Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "gr_audio_registry.h" +#include <audio_oss_source.h> +#include <gr_io_signature.h> +#include <gr_prefs.h> +#include <sys/soundcard.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdio.h> +#include <iostream> +#include <stdexcept> + +AUDIO_REGISTER_SOURCE(oss)( + int sampling_rate, const std::string &device_name, bool ok_to_block +){ + return audio_source::sptr(new audio_oss_source(sampling_rate, device_name, ok_to_block)); +} + +static std::string +default_device_name () +{ + return gr_prefs::singleton()->get_string("audio_oss", "default_input_device", "/dev/dsp"); +} + +audio_oss_source::audio_oss_source (int sampling_rate, + const std::string device_name, + bool ok_to_block) + : audio_source ("audio_oss_source", + gr_make_io_signature (0, 0, 0), + gr_make_io_signature (1, 2, sizeof (float))), + d_sampling_rate (sampling_rate), + d_device_name (device_name.empty() ? default_device_name() : device_name), + d_fd (-1), d_buffer (0), d_chunk_size (0) +{ + if ((d_fd = open (d_device_name.c_str (), O_RDONLY)) < 0){ + fprintf (stderr, "audio_oss_source: "); + perror (d_device_name.c_str ()); + throw std::runtime_error ("audio_oss_source"); + } + + double CHUNK_TIME = + std::max(0.001, gr_prefs::singleton()->get_double("audio_oss", "latency", 0.005)); + + d_chunk_size = (int) (d_sampling_rate * CHUNK_TIME); + set_output_multiple (d_chunk_size); + + d_buffer = new short [d_chunk_size * 2]; + + int format = AFMT_S16_NE; + int orig_format = format; + if (ioctl (d_fd, SNDCTL_DSP_SETFMT, &format) < 0){ + std::cerr << "audio_oss_source: " << d_device_name << " ioctl failed\n"; + perror (d_device_name.c_str ()); + throw std::runtime_error ("audio_oss_source"); + } + + if (format != orig_format){ + fprintf (stderr, "audio_oss_source: unable to support format %d\n", orig_format); + fprintf (stderr, " card requested %d instead.\n", format); + } + + // set to stereo no matter what. Some hardware only does stereo + int channels = 2; + if (ioctl (d_fd, SNDCTL_DSP_CHANNELS, &channels) < 0 || channels != 2){ + perror ("audio_oss_source: could not set STEREO mode"); + throw std::runtime_error ("audio_oss_source"); + } + + // set sampling freq + int sf = sampling_rate; + if (ioctl (d_fd, SNDCTL_DSP_SPEED, &sf) < 0){ + std::cerr << "audio_oss_source: " + << d_device_name << ": invalid sampling_rate " + << sampling_rate << "\n"; + sampling_rate = 8000; + if (ioctl (d_fd, SNDCTL_DSP_SPEED, &sf) < 0){ + std::cerr << "audio_oss_source: failed to set sampling_rate to 8000\n"; + throw std::runtime_error ("audio_oss_source"); + } + } +} + +audio_oss_source::~audio_oss_source () +{ + close (d_fd); + delete [] d_buffer; +} + +int +audio_oss_source::work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + float *f0 = (float *) output_items[0]; + float *f1 = (float *) output_items[1]; // will be invalid if this is mono output + + const int shorts_per_item = 2; // L + R + const int bytes_per_item = shorts_per_item * sizeof (short); + + // To minimize latency, never return more than CHUNK_TIME + // worth of samples per call to work. + + noutput_items = std::min (noutput_items, d_chunk_size); + + int base = 0; + int ntogo = noutput_items; + + while (ntogo > 0){ + int nbytes = std::min (ntogo, d_chunk_size) * bytes_per_item; + int result_nbytes = read (d_fd, d_buffer, nbytes); + + if (result_nbytes < 0){ + perror ("audio_oss_source"); + return -1; // say we're done + } + + if ((result_nbytes & (bytes_per_item - 1)) != 0){ + fprintf (stderr, "audio_oss_source: internal error.\n"); + throw std::runtime_error ("internal error"); + } + + int result_nitems = result_nbytes / bytes_per_item; + + // now unpack samples into output streams + + switch (output_items.size ()){ + case 1: // mono output + for (int i = 0; i < result_nitems; i++){ + f0[base+i] = d_buffer[2*i+0] * (1.0 / 32767); + } + break; + + case 2: // stereo output + for (int i = 0; i < result_nitems; i++){ + f0[base+i] = d_buffer[2*i+0] * (1.0 / 32767); + f1[base+i] = d_buffer[2*i+1] * (1.0 / 32767); + } + break; + + default: + assert (0); + } + + ntogo -= result_nitems; + base += result_nitems; + } + + return noutput_items - ntogo; +} diff --git a/gr-audio/lib/oss/audio_oss_source.h b/gr-audio/lib/oss/audio_oss_source.h new file mode 100644 index 000000000..b20ef5c05 --- /dev/null +++ b/gr-audio/lib/oss/audio_oss_source.h @@ -0,0 +1,58 @@ +/* -*- c++ -*- */ +/* + * Copyright 2004-2011 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio 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, or (at your option) + * any later version. + * + * GNU Radio 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 Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_AUDIO_OSS_SOURCE_H +#define INCLUDED_AUDIO_OSS_SOURCE_H + +#include <gr_audio_source.h> +#include <string> + +/*! + * \brief audio source using OSS + * + * Output signature is one or two streams of floats. + * Output samples will be in the range [-1,1]. + */ + +class audio_oss_source : public audio_source { + + int d_sampling_rate; + std::string d_device_name; + int d_fd; + short *d_buffer; + int d_chunk_size; + +public: + audio_oss_source (int sampling_rate, + const std::string device_name = "", + bool ok_to_block = true); + + ~audio_oss_source (); + + int work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + + + +#endif /* INCLUDED_AUDIO_OSS_SOURCE_H */ diff --git a/gr-audio/lib/oss/gr-audio-oss.conf b/gr-audio/lib/oss/gr-audio-oss.conf new file mode 100644 index 000000000..6ea14d67e --- /dev/null +++ b/gr-audio/lib/oss/gr-audio-oss.conf @@ -0,0 +1,9 @@ +# This file contains system wide configuration data for GNU Radio. +# You may override any setting on a per-user basis by editing +# ~/.gnuradio/config.conf + +[audio_oss] + +default_input_device = /dev/dsp +default_output_device = /dev/dsp +latency = 0.005 # in seconds |