initial reworking for mod_portaudio multiple enpoint support

src/mod/endpoints/mod_portaudio/mod_portaudio.c

@@ -106,6 +106,34 @@ struct audio_stream {
 };
 typedef struct audio_stream audio_stream_t;
 
+typedef struct _pa_shared_device {
+	/*! Sampling rate */
+	int sample_rate;
+	/*! */
+	int codec_ms;
+	/*! Device number */
+	int devno;
+	/*! Running stream (if a stream is already running for devno) */
+	audio_stream_t *stream;
+	/*! The actual portaudio device number */
+	/*! It's a shared device after all */
+	switch_mutex_t *mutex;
+} pa_shared_device_t;
+
+typedef struct _pa_endpoint {
+	/*! Input device for this endpoint */
+	pa_shared_device_t *indev;
+
+	/*! Output device for this endpoint */
+	pa_shared_device_t *outdev;
+
+	/*! Channel index within the input device stream */
+	int inchan;
+
+	/*! Channel index within the input device stream */
+	int outchan;
+} pa_endpoint_t;
+
 static struct {
 	int debug;
 	int port;

src/mod/endpoints/mod_portaudio/pablio.h

@@ -56,17 +56,19 @@ extern "C" {
 
 #include <string.h>
 
-	typedef struct {
-		PaUtilRingBuffer inFIFO;
-		PaUtilRingBuffer outFIFO;
-		PaStream *istream;
-		PaStream *ostream;
-		PaStream *iostream;
-		int bytesPerFrame;
-		int do_dual;
-		int has_in;
-		int has_out;
-	} PABLIO_Stream;
+#define MAX_IO_CHANNELS 2
+typedef struct {
+	PaStream *istream;
+	PaStream *ostream;
+	PaStream *iostream;
+	int bytesPerFrame;
+	int do_dual;
+	int has_in;
+	int has_out;
+	PaUtilRingBuffer inFIFOs[2]
+	PaUtilRingBuffer outFIFOs[2]
+	int channelCount;
+} PABLIO_Stream;
 
 /* Values for flags for OpenAudioStream(). */
 #define PABLIO_READ     (1<<0)