From: Jaroslav Kysela <perex@perex.cz>
Date: Fri, 6 Jan 2006 20:01:08 +0000 (+0000)
Subject: Added pcm_min test & example - minimalistic pcm output
X-Git-Tag: v1.0.11rc3~15
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=4e1452ac07614e0536a20098700ca35de7f10f05;p=alsa-lib.git

Added pcm_min test & example - minimalistic pcm output
---

diff --git a/test/Makefile.am b/test/Makefile.am
index 1fbde8f0..ba3082df 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -1,9 +1,10 @@
-check_PROGRAMS=control pcm latency seq \
+check_PROGRAMS=control pcm pcm_min latency seq \
 	       playmidi1 timer rawmidi midiloop \
 	       oldapi queue_timer
 
 control_LDADD=../src/libasound.la
 pcm_LDADD=../src/libasound.la
+pcm_min_LDADD=../src/libasound.la
 latency_LDADD=../src/libasound.la
 seq_LDADD=../src/libasound.la
 playmidi1_LDADD=../src/libasound.la
diff --git a/test/pcm_min.c b/test/pcm_min.c
new file mode 100644
index 00000000..3c610189
--- /dev/null
+++ b/test/pcm_min.c
@@ -0,0 +1,56 @@
+/*
+ *  This extra small demo sends a raw file to your speakers.
+ */
+
+#include "../include/asoundlib.h"
+
+static char *device = "default";			/* playback device */
+
+snd_output_t *output = NULL;
+unsigned char buffer[16*1024];				/* some random data */
+
+int main(void)
+{
+        int err;
+        unsigned int i;
+        snd_pcm_t *handle;
+        snd_pcm_sframes_t frames;
+
+        for (i = 0; i < sizeof(buffer); i++)
+                buffer[i] = random() & 0xff;
+
+	if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
+		printf("Playback open error: %s\n", snd_strerror(err));
+		exit(EXIT_FAILURE);
+	}
+	if ((err = snd_pcm_set_params(handle,
+	                              SND_PCM_FORMAT_U8,
+	                              SND_PCM_ACCESS_RW_INTERLEAVED,
+	                              1,
+	                              48000,
+	                              1,
+	                              500000)) < 0) {	/* 0.5sec */
+		printf("Playback open error: %s\n", snd_strerror(err));
+		exit(EXIT_FAILURE);
+	}
+
+        if ((err = snd_pcm_nonblock(handle, 0)) < 0) {
+                printf("Set to blocking mode failed: %s\n", snd_strerror(err));
+                exit(EXIT_FAILURE);
+        }
+
+        for (i = 0; i < 16; i++) {
+                frames = snd_pcm_writei(handle, buffer, sizeof(buffer));
+                if (frames < 0)
+                        frames = snd_pcm_recover(handle, frames, 0);
+                if (frames < 0) {
+                        printf("snd_pcm_writei failed: %s\n", snd_strerror(err));
+                        break;
+                }
+                if (frames > 0 && frames < (long)sizeof(buffer))
+                        printf("Short write (expected %li, wrote %li)\n", (long)sizeof(buffer), frames);
+        }
+
+	snd_pcm_close(handle);
+	return 0;
+}