X-Git-Url: https://git.ao2.it/libam7xxx.git/blobdiff_plain/2c897cad505d3ba27723dcff7252ff123d90ab53..521c3915354a7119b67969fe9824b31710d732ca:/src/am7xxx.c

diff --git a/src/am7xxx.c b/src/am7xxx.c
index c039147..e809c55 100644
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -107,7 +107,9 @@ static struct am7xxx_usb_device_descriptor supported_devices[] = {
 struct _am7xxx_device {
 	libusb_device_handle *usb_device;
 	uint8_t buffer[AM7XXX_HEADER_WIRE_SIZE];
+	am7xxx_device_info *device_info;
 	am7xxx_context *ctx;
+	const struct am7xxx_usb_device_descriptor *desc;
 	am7xxx_device *next;
 };
 
@@ -390,7 +392,8 @@ static int read_header(am7xxx_device *dev, struct am7xxx_header *h)
 		ret = 0;
 	} else {
 		error(dev->ctx,
-		      "Received a packet with direction AM7XXX_DIRECTION_OUT, weird!\n");
+		      "Expected an AM7XXX_DIRECTION_IN packet, got one with direction = %d. Weird!\n",
+		      h->direction);
 		ret = -EINVAL;
 	}
 
@@ -449,7 +452,8 @@ static void log_message(am7xxx_context *ctx,
 	return;
 }
 
-static am7xxx_device *add_new_device(am7xxx_context *ctx)
+static am7xxx_device *add_new_device(am7xxx_context *ctx,
+				     const struct am7xxx_usb_device_descriptor *desc)
 {
 	am7xxx_device **devices_list;
 	am7xxx_device *new_device;
@@ -467,6 +471,7 @@ static am7xxx_device *add_new_device(am7xxx_context *ctx)
 	memset(new_device, 0, sizeof(*new_device));
 
 	new_device->ctx = ctx;
+	new_device->desc = desc;
 
 	devices_list = &(ctx->devices_list);
 
@@ -555,15 +560,15 @@ static int scan_devices(am7xxx_context *ctx, scan_op op,
 			continue;
 
 		for (j = 0; j < ARRAY_SIZE(supported_devices); j++) {
-			if (desc.idVendor == supported_devices[j].vendor_id
-			    && desc.idProduct == supported_devices[j].product_id) {
+			if (desc.idVendor == supported_devices[j].vendor_id &&
+			    desc.idProduct == supported_devices[j].product_id) {
 
 				if (op == SCAN_OP_BUILD_DEVLIST) {
 					am7xxx_device *new_device;
 					info(ctx, "am7xxx device found, index: %d, name: %s\n",
 					     current_index,
 					     supported_devices[j].name);
-					new_device = add_new_device(ctx);
+					new_device = add_new_device(ctx, &supported_devices[j]);
 					if (new_device == NULL) {
 						/* XXX, the caller may want
 						 * to call am7xxx_shutdown() if
@@ -596,8 +601,28 @@ static int scan_devices(am7xxx_context *ctx, scan_op op,
 						goto out;
 					}
 
-					libusb_set_configuration((*dev)->usb_device, 2);
-					libusb_claim_interface((*dev)->usb_device, 0);
+					/* XXX, the device is now open, if any
+					 * of the calls below fail we need to
+					 * close it again before bailing out.
+					 */
+
+					ret = libusb_set_configuration((*dev)->usb_device, 2);
+					if (ret < 0) {
+						debug(ctx, "libusb_set_configuration failed\n");
+						debug(ctx, "Cannot set configuration 2\n");
+						goto out_libusb_close;
+					}
+
+					ret = libusb_claim_interface((*dev)->usb_device, 0);
+					if (ret < 0) {
+						debug(ctx, "libusb_claim_interface failed\n");
+						debug(ctx, "Cannot claim interface 0\n");
+out_libusb_close:
+						libusb_close((*dev)->usb_device);
+						(*dev)->usb_device = NULL;
+						goto out;
+					}
+
 					goto out;
 				}
 				current_index++;
@@ -673,6 +698,7 @@ AM7XXX_PUBLIC void am7xxx_shutdown(am7xxx_context *ctx)
 	while (current) {
 		am7xxx_device *next = current->next;
 		am7xxx_close_device(current);
+		free(current->device_info);
 		free(current);
 		current = next;
 	}
@@ -700,12 +726,28 @@ AM7XXX_PUBLIC int am7xxx_open_device(am7xxx_context *ctx, am7xxx_device **dev,
 	ret = scan_devices(ctx, SCAN_OP_OPEN_DEVICE, device_index, dev);
 	if (ret < 0) {
 		errno = ENODEV;
+		goto out;
 	} else if (ret > 0) {
 		warning(ctx, "device %d already open\n", device_index);
 		errno = EBUSY;
 		ret = -EBUSY;
+		goto out;
+	}
+
+	/* Philips/Sagemcom PicoPix projectors require that the DEVINFO packet
+	 * is the first one to be sent to the device in order for it to
+	 * successfully return the correct device information.
+	 *
+	 * So, if there is not a cached version of it (from a previous open),
+	 * we ask for device info at open time,
+	 */
+	if ((*dev)->device_info == NULL) {
+		ret = am7xxx_get_device_info(*dev, NULL);
+		if (ret < 0)
+			error(ctx, "cannot get device info\n");
 	}
 
+out:
 	return ret;
 }
 
@@ -743,6 +785,11 @@ AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
 		},
 	};
 
+	if (dev->device_info) {
+		memcpy(device_info, dev->device_info, sizeof(*device_info));
+		return 0;
+	}
+
 	ret = send_header(dev, &h);
 	if (ret < 0)
 		return ret;
@@ -751,12 +798,27 @@ AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
 	if (ret < 0)
 		return ret;
 
-	device_info->native_width = h.header_data.devinfo.native_width;
-	device_info->native_height = h.header_data.devinfo.native_height;
+	if (h.packet_type != AM7XXX_PACKET_TYPE_DEVINFO) {
+		error(dev->ctx, "expected packet type: %d, got %d instead!\n",
+		      AM7XXX_PACKET_TYPE_DEVINFO, h.packet_type);
+		errno = ENOTSUP;
+		return -ENOTSUP;
+	}
+
+	dev->device_info = malloc(sizeof(*dev->device_info));
+	if (dev->device_info == NULL) {
+		error(dev->ctx, "cannot allocate a device info (%s)\n",
+		       strerror(errno));
+		return -ENOMEM;
+	}
+	memset(dev->device_info, 0, sizeof(*dev->device_info));
+
+	dev->device_info->native_width = h.header_data.devinfo.native_width;
+	dev->device_info->native_height = h.header_data.devinfo.native_height;
 #if 0
 	/* No reason to expose these in the public API until we know what they mean */
-	device_info->unknown0 = h.header_data.devinfo.unknown0;
-	device_info->unknown1 = h.header_data.devinfo.unknown1;
+	dev->device_info->unknown0 = h.header_data.devinfo.unknown0;
+	dev->device_info->unknown1 = h.header_data.devinfo.unknown1;
 #endif
 
 	return 0;