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Diffstat (limited to '')
| -rw-r--r-- | spa/plugins/alsa/test-hw-params.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/spa/plugins/alsa/test-hw-params.c b/spa/plugins/alsa/test-hw-params.c new file mode 100644 index 0000000..7315061 --- /dev/null +++ b/spa/plugins/alsa/test-hw-params.c @@ -0,0 +1,173 @@ +/* Spa + * + * Copyright © 2022 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include <stdio.h> +#include <stdbool.h> +#include <limits.h> +#include <getopt.h> +#include <math.h> + +#include <alsa/asoundlib.h> + +#include <spa/utils/defs.h> + +#define DEFAULT_DEVICE "default" + + +struct state { + const char *device; + snd_output_t *output; + snd_pcm_t *hndl; +}; + +#define CHECK(s,msg,...) { \ + int __err; \ + if ((__err = (s)) < 0) { \ + fprintf(stderr, msg ": %s\n", ##__VA_ARGS__, snd_strerror(__err)); \ + return __err; \ + } \ +} + +static const char *get_class(snd_pcm_class_t c) +{ + switch (c) { + case SND_PCM_CLASS_GENERIC: + return "generic"; + case SND_PCM_CLASS_MULTI: + return "multichannel"; + case SND_PCM_CLASS_MODEM: + return "modem"; + case SND_PCM_CLASS_DIGITIZER: + return "digitizer"; + default: + return "unknown"; + } +} + +static const char *get_subclass(snd_pcm_subclass_t c) +{ + switch (c) { + case SND_PCM_SUBCLASS_GENERIC_MIX: + return "generic-mix"; + case SND_PCM_SUBCLASS_MULTI_MIX: + return "multichannel-mix"; + default: + return "unknown"; + } +} + +static void show_help(const char *name, bool error) +{ + fprintf(error ? stderr : stdout, "%s [options]\n" + " -h, --help Show this help\n" + " -D, --device device name (default '%s')\n" + " -C, --capture capture mode (default playback)\n", + name, DEFAULT_DEVICE); +} + +int main(int argc, char *argv[]) +{ + struct state state = { 0, }; + snd_pcm_hw_params_t *hparams; + snd_pcm_info_t *info; + snd_pcm_sync_id_t sync; + snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK; + snd_pcm_chmap_query_t **maps; + int c, i; + static const struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "device", required_argument, NULL, 'D' }, + { "capture", no_argument, NULL, 'C' }, + { NULL, 0, NULL, 0} + }; + state.device = DEFAULT_DEVICE; + + while ((c = getopt_long(argc, argv, "hD:C", long_options, NULL)) != -1) { + switch (c) { + case 'h': + show_help(argv[0], false); + return 0; + case 'D': + state.device = optarg; + break; + case 'C': + stream = SND_PCM_STREAM_CAPTURE; + break; + default: + show_help(argv[0], true); + return -1; + } + } + + CHECK(snd_output_stdio_attach(&state.output, stdout, 0), "attach failed"); + + fprintf(stdout, "opening device: '%s'\n", state.device); + + CHECK(snd_pcm_open(&state.hndl, state.device, stream, 0), + "open %s failed", state.device); + + snd_pcm_info_alloca(&info); + snd_pcm_info(state.hndl, info); + + fprintf(stdout, "info:\n"); + fprintf(stdout, " device: %u\n", snd_pcm_info_get_device(info)); + fprintf(stdout, " subdevice: %u\n", snd_pcm_info_get_subdevice(info)); + fprintf(stdout, " stream: %s\n", snd_pcm_stream_name(snd_pcm_info_get_stream(info))); + fprintf(stdout, " card: %d\n", snd_pcm_info_get_card(info)); + fprintf(stdout, " id: '%s'\n", snd_pcm_info_get_id(info)); + fprintf(stdout, " name: '%s'\n", snd_pcm_info_get_name(info)); + fprintf(stdout, " subdevice name: '%s'\n", snd_pcm_info_get_subdevice_name(info)); + fprintf(stdout, " class: %s\n", get_class(snd_pcm_info_get_class(info))); + fprintf(stdout, " subclass: %s\n", get_subclass(snd_pcm_info_get_subclass(info))); + fprintf(stdout, " subdevice count: %u\n", snd_pcm_info_get_subdevices_count(info)); + fprintf(stdout, " subdevice avail: %u\n", snd_pcm_info_get_subdevices_avail(info)); + sync = snd_pcm_info_get_sync(info); + fprintf(stdout, " sync: %08x:%08x:%08x:%08x\n", + sync.id32[0], sync.id32[1], sync.id32[2],sync.id32[3]); + + /* channel maps */ + if ((maps = snd_pcm_query_chmaps(state.hndl)) != NULL) { + fprintf(stdout, "channels:\n"); + + for (i = 0; maps[i]; i++) { + snd_pcm_chmap_t* map = &maps[i]->map; + char buf[2048]; + + snd_pcm_chmap_print(map, sizeof(buf), buf); + + fprintf(stdout, " %d: %s\n", map->channels, buf); + } + snd_pcm_free_chmaps(maps); + } + + /* hw params */ + snd_pcm_hw_params_alloca(&hparams); + snd_pcm_hw_params_any(state.hndl, hparams); + + snd_pcm_hw_params_dump(hparams, state.output); + + snd_pcm_close(state.hndl); + + return EXIT_SUCCESS; +} |