diff options
Diffstat (limited to 'gr-audio/lib/alsa/gri_alsa.cc')
| -rw-r--r-- | gr-audio/lib/alsa/gri_alsa.cc | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/gr-audio/lib/alsa/gri_alsa.cc b/gr-audio/lib/alsa/gri_alsa.cc new file mode 100644 index 000000000..d9fda0f7d --- /dev/null +++ b/gr-audio/lib/alsa/gri_alsa.cc @@ -0,0 +1,175 @@ +/* -*- c++ -*- */ +/* + * Copyright 2004 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 <gri_alsa.h> +#include <algorithm> + +static snd_pcm_access_t access_types[] = { + SND_PCM_ACCESS_MMAP_INTERLEAVED, + SND_PCM_ACCESS_MMAP_NONINTERLEAVED, + SND_PCM_ACCESS_MMAP_COMPLEX, + SND_PCM_ACCESS_RW_INTERLEAVED, + SND_PCM_ACCESS_RW_NONINTERLEAVED +}; + +static snd_pcm_format_t format_types[] = { + // SND_PCM_FORMAT_UNKNOWN, + SND_PCM_FORMAT_S8, + SND_PCM_FORMAT_U8, + SND_PCM_FORMAT_S16_LE, + SND_PCM_FORMAT_S16_BE, + SND_PCM_FORMAT_U16_LE, + SND_PCM_FORMAT_U16_BE, + SND_PCM_FORMAT_S24_LE, + SND_PCM_FORMAT_S24_BE, + SND_PCM_FORMAT_U24_LE, + SND_PCM_FORMAT_U24_BE, + SND_PCM_FORMAT_S32_LE, + SND_PCM_FORMAT_S32_BE, + SND_PCM_FORMAT_U32_LE, + SND_PCM_FORMAT_U32_BE, + SND_PCM_FORMAT_FLOAT_LE, + SND_PCM_FORMAT_FLOAT_BE, + SND_PCM_FORMAT_FLOAT64_LE, + SND_PCM_FORMAT_FLOAT64_BE, + SND_PCM_FORMAT_IEC958_SUBFRAME_LE, + SND_PCM_FORMAT_IEC958_SUBFRAME_BE, + SND_PCM_FORMAT_MU_LAW, + SND_PCM_FORMAT_A_LAW, + SND_PCM_FORMAT_IMA_ADPCM, + SND_PCM_FORMAT_MPEG, + SND_PCM_FORMAT_GSM, + SND_PCM_FORMAT_SPECIAL, + SND_PCM_FORMAT_S24_3LE, + SND_PCM_FORMAT_S24_3BE, + SND_PCM_FORMAT_U24_3LE, + SND_PCM_FORMAT_U24_3BE, + SND_PCM_FORMAT_S20_3LE, + SND_PCM_FORMAT_S20_3BE, + SND_PCM_FORMAT_U20_3LE, + SND_PCM_FORMAT_U20_3BE, + SND_PCM_FORMAT_S18_3LE, + SND_PCM_FORMAT_S18_3BE, + SND_PCM_FORMAT_U18_3LE, + SND_PCM_FORMAT_U18_3BE +}; + +static unsigned int test_rates[] = { + 8000, 16000, 22050, 32000, 44100, 48000, 96000, 192000 +}; + +#define NELEMS(x) (sizeof(x)/sizeof(x[0])) + +void +gri_alsa_dump_hw_params (snd_pcm_t *pcm, snd_pcm_hw_params_t *hwparams, FILE *fp) +{ + fprintf (fp, "PCM name: %s\n", snd_pcm_name (pcm)); + + fprintf (fp, "Access types:\n"); + for (unsigned i = 0; i < NELEMS (access_types); i++){ + snd_pcm_access_t at = access_types[i]; + fprintf (fp, " %-20s %s\n", + snd_pcm_access_name (at), + snd_pcm_hw_params_test_access (pcm, hwparams, at) == 0 ? "YES" : "NO"); + } + + fprintf (fp, "Formats:\n"); + for (unsigned i = 0; i < NELEMS (format_types); i++){ + snd_pcm_format_t ft = format_types[i]; + if (0) + fprintf (fp, " %-20s %s\n", + snd_pcm_format_name (ft), + snd_pcm_hw_params_test_format (pcm, hwparams, ft) == 0 ? "YES" : "NO"); + else { + if (snd_pcm_hw_params_test_format (pcm, hwparams, ft) == 0) + fprintf (fp, " %-20s YES\n", snd_pcm_format_name (ft)); + } + } + + fprintf (fp, "Number of channels\n"); + unsigned int min_chan, max_chan; + snd_pcm_hw_params_get_channels_min (hwparams, &min_chan); + snd_pcm_hw_params_get_channels_max (hwparams, &max_chan); + fprintf (fp, " min channels: %d\n", min_chan); + fprintf (fp, " max channels: %d\n", max_chan); + unsigned int chan; + max_chan = std::min (max_chan, 16U); // truncate display... + for (chan = min_chan; chan <= max_chan; chan++){ + fprintf (fp, " %d channels\t%s\n", chan, + snd_pcm_hw_params_test_channels (pcm, hwparams, chan) == 0 ? "YES" : "NO"); + } + + fprintf (fp, "Sample Rates:\n"); + unsigned int min_rate, max_rate; + int min_dir, max_dir; + + snd_pcm_hw_params_get_rate_min (hwparams, &min_rate, &min_dir); + snd_pcm_hw_params_get_rate_max (hwparams, &max_rate, &max_dir); + fprintf (fp, " min rate: %7d (dir = %d)\n", min_rate, min_dir); + fprintf (fp, " max rate: %7d (dir = %d)\n", max_rate, max_dir); + for (unsigned i = 0; i < NELEMS (test_rates); i++){ + unsigned int rate = test_rates[i]; + fprintf (fp, " %6u %s\n", rate, + snd_pcm_hw_params_test_rate (pcm, hwparams, rate, 0) == 0 ? "YES" : "NO"); + } + + fflush (fp); +} + +bool +gri_alsa_pick_acceptable_format (snd_pcm_t *pcm, + snd_pcm_hw_params_t *hwparams, + snd_pcm_format_t acceptable_formats[], + unsigned nacceptable_formats, + snd_pcm_format_t *selected_format, + const char *error_msg_tag, + bool verbose) +{ + int err; + + // pick a format that we like... + for (unsigned i = 0; i < nacceptable_formats; i++){ + if (snd_pcm_hw_params_test_format (pcm, hwparams, + acceptable_formats[i]) == 0){ + err = snd_pcm_hw_params_set_format (pcm, hwparams, acceptable_formats[i]); + if (err < 0){ + fprintf (stderr, "%s[%s]: failed to set format: %s\n", + error_msg_tag, snd_pcm_name (pcm), snd_strerror (err)); + return false; + } + if (verbose) + fprintf (stdout, "%s[%s]: using %s\n", + error_msg_tag, snd_pcm_name (pcm), + snd_pcm_format_name (acceptable_formats[i])); + *selected_format = acceptable_formats[i]; + return true; + } + } + + fprintf (stderr, "%s[%s]: failed to find acceptable format", + error_msg_tag, snd_pcm_name (pcm)); + return false; +} |