1 files changed, 45 insertions, 0 deletions
diff --git a/pd/portaudio/pa_linux_alsa/pa_linux_alsa.h b/pd/portaudio/pa_linux_alsa/pa_linux_alsa.h
new file mode 100644
index 00000000..62c9512c
--- /dev/null
+++ b/pd/portaudio/pa_linux_alsa/pa_linux_alsa.h
@@ -0,0 +1,45 @@
+
+#include <alsa/asoundlib.h>
+
+#include <pthread.h>
+
+#include "pa_util.h"
+#include "pa_process.h"
+#include "pa_cpuload.h"
+#include "pa_stream.h"
+
+typedef struct PaAlsaStream
+{
+    PaUtilStreamRepresentation streamRepresentation;
+    PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+    PaUtilBufferProcessor bufferProcessor;
+
+    snd_pcm_t *pcm_capture;
+    snd_pcm_t *pcm_playback;
+
+    int callback_finished;      /* bool: are we in the "callback finished" state? */
+
+    int frames_per_period;
+    int playback_hostsampleformat;
+
+    int capture_channels;
+    int playback_channels;
+
+    int capture_interleaved;    /* bool: is capture interleaved? */
+    int playback_interleaved;   /* bool: is playback interleaved? */
+
+    int callback_mode;          /* bool: are we running in callback mode? */
+    pthread_t callback_thread;
+
+    /* the callback thread uses these to poll the sound device, waiting
+     * for data to be ready/available */
+    unsigned int capture_nfds;
+    unsigned int playback_nfds;
+    struct pollfd *pfds;
+
+    /* these aren't really stream state, the callback uses them */
+    snd_pcm_uframes_t capture_offset;
+    snd_pcm_uframes_t playback_offset;
+}
+PaAlsaStream;
+