Primitive audio device detection added

1 files changed, 75 insertions, 0 deletions

diff --git a/hw/aud.c b/hw/aud.c
new file mode 100644
index 0000000..a1379c6
--- /dev/null
+++ b/hw/aud.c
@@ -0,0 +1,75 @@
+#include "aud.h"
+
+//harc-copy from aplay.c static void device_list(void)
+int audio_get_devices()
+{
+	snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
+
+	snd_ctl_t *handle;
+	int card, err, dev, idx;
+	snd_ctl_card_info_t *info;
+	snd_pcm_info_t *pcminfo;
+	snd_ctl_card_info_alloca(&info);
+	snd_pcm_info_alloca(&pcminfo);
+
+	card = -1;
+	if (snd_card_next(&card) < 0 || card < 0) {
+		printf("no soundcards found...\n");
+		return -1;
+	}
+	printf("**** List of %s Hardware Devices ****\n",
+	       snd_pcm_stream_name(stream));
+	while (card >= 0) {
+		char name[32];
+		sprintf(name, "hw:%d", card);
+		if ((err = snd_ctl_open(&handle, name, 0)) < 0) {
+			printf("control open (%i): %s\n", card, snd_strerror(err));
+			goto next_card;
+		}
+		if ((err = snd_ctl_card_info(handle, info)) < 0) {
+			printf("control hardware info (%i): %s\n", card, snd_strerror(err));
+			snd_ctl_close(handle);
+			goto next_card;
+		}
+		dev = -1;
+		while (1) {
+			unsigned int count;
+			if (snd_ctl_pcm_next_device(handle, &dev)<0)
+				printf("snd_ctl_pcm_next_device\n");
+			if (dev < 0)
+				break;
+			snd_pcm_info_set_device(pcminfo, dev);
+			snd_pcm_info_set_subdevice(pcminfo, 0);
+			snd_pcm_info_set_stream(pcminfo, stream);
+			if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
+				if (err != -ENOENT)
+					printf("control digital audio info (%i): %s\n", card, snd_strerror(err));
+				continue;
+			}
+			printf("card %i: %s [%s], device %i: %s [%s]\n",
+				card, snd_ctl_card_info_get_id(info), snd_ctl_card_info_get_name(info),
+				dev,
+				snd_pcm_info_get_id(pcminfo),
+				snd_pcm_info_get_name(pcminfo));
+			count = snd_pcm_info_get_subdevices_count(pcminfo);
+			printf( "  Subdevices: %i/%i\n",
+				snd_pcm_info_get_subdevices_avail(pcminfo), count);
+			for (idx = 0; idx < (int)count; idx++) {
+				snd_pcm_info_set_subdevice(pcminfo, idx);
+				if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
+					printf("control digital audio playback info (%i): %s\n", card, snd_strerror(err));
+				} else {
+					printf("  Subdevice #%d: %s\n",
+						idx, snd_pcm_info_get_subdevice_name(pcminfo));
+				}
+			}
+		}
+		snd_ctl_close(handle);
+	next_card:
+		if (snd_card_next(&card) < 0) {
+			printf("snd_card_next\n");
+			break;
+		}
+	}
+	return 0;
+}