Fix an URB and memory leak

Makefile

@@ -1,8 +1,9 @@
 CFLAGS += -Wall
 CFLAGS += -Werror
+TARGETS = hdjd aac123 explore
 CFLAGS += -g
 
-all: hdjd aac123 explore
+all: $(TARGETS)
 
 hdjd: LDFLAGS += $(shell pkg-config --libs libusb-1.0)
 hdjd: LDFLAGS += $(shell pkg-config --libs alsa)
@@ -23,4 +24,4 @@ aactest: LDLIBS += $(shell pkg-config --libs alsa)
 aactest: LDLIBS += -lfaad -lmp4v2
 
 clean:
-	rm -f hdjd *.o
+	rm -f $(TARGETS) *.o

aac123.c

@@ -5,25 +5,13 @@
 #include <neaacdec.h>
 #include <mp4v2/mp4v2.h>
 
-/* Some things I use for debugging */
-#ifdef NODUMP
-#  define DUMPf(fmt, args...)
-#else
-#  define DUMPf(fmt, args...) fprintf(stderr, "%s:%s:%d " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##args)
-#endif
-#define DUMP() DUMPf("")
-#define DUMP_d(v) DUMPf("%s = %d", #v, v)
-#define DUMP_x(v) DUMPf("%s = 0x%x", #v, v)
-#define DUMP_s(v) DUMPf("%s = %s", #v, v)
-#define DUMP_c(v) DUMPf("%s = '%c' (0x%02x)", #v, v, v)
-#define DUMP_p(v) DUMPf("%s = %p", #v, v)
+#include "dump.h"
 
 
 static int
 GetAACTrack(MP4FileHandle *infile)
 {
     /* find AAC track */
-    int rc;
     MP4TrackId numTracks = MP4GetNumberOfTracks(infile, NULL, 0);
     MP4TrackId i;
 
@@ -66,10 +54,9 @@ play_file(snd_pcm_t *snd, char *fn)
 
     NeAACDecHandle hDecoder;
     NeAACDecConfigurationPtr config;
-    mp4AudioSpecificConfig mp4ASC;
 
     unsigned char *buffer;
-    int buffer_size;
+    uint32_t buffer_size;
     unsigned long samplerate;
     unsigned char channels;
 
@@ -124,9 +111,7 @@ play_file(snd_pcm_t *snd, char *fn)
     DUMP_d(numSamples);
     for (sampleId = 1; sampleId <= numSamples; sampleId++) {
         int rc;
-        long dur;
         unsigned int sample_count;
-        unsigned int delay = 0;
         NeAACDecFrameInfo frameInfo;
 
         buffer = NULL;

alsa.c

@@ -82,6 +82,7 @@ alsa_read_ready()
 			usb_write(buf, converted);
 		}
 	}
+	snd_midi_event_free(midi_event_parser);
 }
 
 void
@@ -120,10 +121,10 @@ alsa_write(uint8_t *data, size_t datalen)
 	snd_seq_ev_set_direct(&ev);
 	snd_seq_ev_set_source(&ev, seq_port);
 	snd_seq_ev_set_subs(&ev);
-	if ((r = snd_seq_event_output(snd_handle, &ev)) < 0) {
+	if ((r = snd_seq_event_output_direct(snd_handle, &ev)) < 0) {
 		fprintf(stderr, "ALSA couldn't write an event: %ld\n", r);
 		abort();
 	}	
 	
-	snd_seq_drain_output(snd_handle);
+	snd_midi_event_free(midi_event_parser);
 }

dump.h

@@ -1,11 +1,5 @@
-/* obj.h: objecty and exceptiony stuff
- *
- * Some macros to make C a bit more like C++, but without bringing in
- * all of C++'s crapola.
- */
-
-#ifndef __OBJ_H__
-#define __OBJ_H__
+#ifndef __DUMP_H__
+#define __DUMP_H__
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -18,8 +12,8 @@
 #  define DUMPf(fmt, args...) fprintf(stderr, "%s:%s:%d " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##args)
 #endif
 #define DUMP() DUMPf("")
-#define DUMP_d(v) DUMPf("%s = %d", #v, v)
-#define DUMP_l(v) DUMPf("%s = %ld", #v, v)
+#define DUMP_d(v) DUMPf("%s = %d", #v, (int)v)
+#define DUMP_l(v) DUMPf("%s = %ld", #v, (long)v)
 #define DUMP_x(v) DUMPf("%s = 0x%x", #v, v)
 #define DUMP_s(v) DUMPf("%s = %s", #v, v)
 #define DUMP_c(v) DUMPf("%s = '%c' (0x%02x)", #v, v, v)

usb.c

@@ -11,6 +11,9 @@
 static struct libusb_device_handle *usb_dev;
 static const struct device *d;
 
+static int writes_pending = 0;
+static int reads_pending = 0;
+
 struct device {
 	uint16_t product_id;
 	uint8_t ep_in;
@@ -36,6 +39,8 @@ usb_initiate_transfer()
 	struct libusb_transfer *xfer = libusb_alloc_transfer(0);
 	libusb_fill_bulk_transfer(xfer, usb_dev, d->ep_in, buf, 256, usb_xfer_done, NULL, 0);
 	libusb_submit_transfer(xfer);
+	DUMP();
+	reads_pending += 1;
 }
 
 void
@@ -43,7 +48,10 @@ usb_xfer_done(struct libusb_transfer *xfer)
 {
 	uint8_t *data = xfer->buffer;
 	int datalen = xfer->actual_length;
+	
+	reads_pending -= 1;
 
+	DUMP();
 	alsa_write(data, datalen);
 	free(data);
 	libusb_free_transfer(xfer);
@@ -54,7 +62,7 @@ int
 usb_setup(char *name, size_t namelen)
 {
 	if (libusb_init(NULL) < 0) {
-		return -1;
+		return -1; 
 	}
 	
 	if (libusb_pollfds_handle_timeouts(NULL) == 0) {
@@ -93,6 +101,7 @@ usb_setup(char *name, size_t namelen)
 		printf("Opened [%s]\n", name);
 	}
 	
+	usb_initiate_transfer();
 
 	return 0;
 }
@@ -117,7 +126,10 @@ usb_fd_setup(int *nfds, fd_set *rfds, fd_set *wfds)
 		}
 	}
 
-	usb_initiate_transfer();
+	if (reads_pending + writes_pending > 10) {
+		fprintf(stderr, "Warning: %d+%d = %d outstanding USB transactions!\n", reads_pending, writes_pending, reads_pending + writes_pending);
+	}
+
 }
 
 void 
@@ -140,6 +152,7 @@ usb_check_fds(fd_set *rfds, fd_set *wfds)
 void
 usb_write_done(struct libusb_transfer *xfer)
 {
+	writes_pending -= 1;
 	free(xfer->buffer);
 	libusb_free_transfer(xfer);
 }
@@ -150,6 +163,7 @@ usb_write(uint8_t *data, size_t datalen)
 	struct libusb_transfer *xfer;
 	unsigned char *buf;
 	
+	writes_pending += 1;
 	xfer = libusb_alloc_transfer(0);
 	buf = (unsigned char *)malloc(datalen);
 	memcpy(buf, data, datalen);