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-rw-r--r--spa/plugins/alsa/test-hw-params.c173
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;
+}