#include <stdarg.h>
#include <errno.h>
#include <libusb.h>
+#include <math.h>
#include "am7xxx.h"
#include "serialize.h"
# define __attribute__(x) /*NOTHING*/
#endif
+/* Control shared library symbols visibility */
+#if defined _WIN32 || defined __CYGWIN__
+ #define AM7XXX_PUBLIC __declspec(dllexport)
+ #define AM7XXX_LOCAL
+#else
+ #if __GNUC__ >= 4
+ #define AM7XXX_PUBLIC __attribute__ ((visibility ("default")))
+ #define AM7XXX_LOCAL __attribute__ ((visibility ("hidden")))
+ #else
+ #define AM7XXX_PUBLIC
+ #define AM7XXX_LOCAL
+ #endif
+#endif
+
static void log_message(am7xxx_context *ctx,
int level,
const char *function,
#define debug(ctx, ...) log_message(ctx, AM7XXX_LOG_DEBUG, __func__, 0, __VA_ARGS__)
#define trace(ctx, ...) log_message(ctx, AM7XXX_LOG_TRACE, NULL, 0, __VA_ARGS__)
+struct am7xxx_ops {
+ int (*set_power_mode)(am7xxx_device *dev, am7xxx_power_mode power);
+ int (*set_zoom_mode)(am7xxx_device *dev, am7xxx_zoom_mode zoom);
+};
+
struct am7xxx_usb_device_descriptor {
const char *name;
uint16_t vendor_id;
uint16_t product_id;
+ uint8_t configuration; /* The bConfigurationValue of the device */
+ uint8_t interface_number; /* The bInterfaceNumber of the device */
+ struct am7xxx_ops ops;
};
-static struct am7xxx_usb_device_descriptor supported_devices[] = {
+static int default_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power);
+static int default_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom);
+
+#define DEFAULT_OPS { \
+ .set_power_mode = default_set_power_mode, \
+ .set_zoom_mode = default_set_zoom_mode, \
+}
+
+static const struct am7xxx_usb_device_descriptor supported_devices[] = {
{
.name = "Acer C110",
.vendor_id = 0x1de1,
.product_id = 0xc101,
+ .configuration = 2,
+ .interface_number = 0,
+ .ops = DEFAULT_OPS,
+ },
+ {
+ .name = "Acer C112",
+ .vendor_id = 0x1de1,
+ .product_id = 0x5501,
+ .configuration = 2,
+ .interface_number = 0,
+ .ops = DEFAULT_OPS,
+ },
+ {
+ .name ="Aiptek PocketCinema T25",
+ .vendor_id = 0x08ca,
+ .product_id = 0x2144,
+ .configuration = 2,
+ .interface_number = 0,
+ .ops = DEFAULT_OPS,
},
{
.name = "Philips/Sagemcom PicoPix 1020",
.vendor_id = 0x21e7,
.product_id = 0x000e,
+ .configuration = 2,
+ .interface_number = 0,
+ .ops = DEFAULT_OPS,
+ },
+ {
+ .name = "Philips/Sagemcom PicoPix 2055",
+ .vendor_id = 0x21e7,
+ .product_id = 0x0016,
+ .configuration = 2,
+ .interface_number = 0,
+ },
+ {
+ .name = "Philips/Sagemcom PicoPix 2330",
+ .vendor_id = 0x21e7,
+ .product_id = 0x0019,
+ .configuration = 1,
+ .interface_number = 0,
},
};
/* The header size on the wire is known to be always 24 bytes, regardless of
- * the memory configuration enforced by different architechtures or compilers
+ * the memory configuration enforced by different architectures or compilers
* for struct am7xxx_header
*/
#define AM7XXX_HEADER_WIRE_SIZE 24
struct _am7xxx_device {
libusb_device_handle *usb_device;
+ struct libusb_transfer *transfer;
+ int transfer_completed;
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;
};
AM7XXX_PACKET_TYPE_DEVINFO = 0x01,
AM7XXX_PACKET_TYPE_IMAGE = 0x02,
AM7XXX_PACKET_TYPE_POWER = 0x04,
- AM7XXX_PACKET_TYPE_UNKNOWN = 0x05,
+ AM7XXX_PACKET_TYPE_ZOOM = 0x05,
} am7xxx_packet_type;
struct am7xxx_generic_header {
uint32_t bit0;
};
+struct am7xxx_zoom_header {
+ uint32_t bit1;
+ uint32_t bit0;
+};
+
/*
* Examples of packet headers:
*
* 04 00 00 00 00 0c ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
*/
+/* Direction of the communication from the host point of view */
+#define AM7XXX_DIRECTION_OUT 0 /* host -> device */
+#define AM7XXX_DIRECTION_IN 1 /* host <- device */
+
struct am7xxx_header {
uint32_t packet_type;
- uint8_t unknown0;
+ uint8_t direction;
uint8_t header_data_len;
uint8_t unknown2;
uint8_t unknown3;
struct am7xxx_devinfo_header devinfo;
struct am7xxx_image_header image;
struct am7xxx_power_header power;
+ struct am7xxx_zoom_header zoom;
} header_data;
};
debug(ctx, "\tbit0: 0x%08x (%u)\n", p->bit0, p->bit0);
}
+static void debug_dump_zoom_header(am7xxx_context *ctx, struct am7xxx_zoom_header *z)
+{
+ if (ctx == NULL || z == NULL)
+ return;
+
+ debug(ctx, "Zoom header:\n");
+ debug(ctx, "\tbit1: 0x%08x (%u)\n", z->bit1, z->bit1);
+ debug(ctx, "\tbit0: 0x%08x (%u)\n", z->bit0, z->bit0);
+}
+
static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
{
if (ctx == NULL || h == NULL)
debug(ctx, "BEGIN\n");
debug(ctx, "packet_type: 0x%08x (%u)\n", h->packet_type, h->packet_type);
- debug(ctx, "unknown0: 0x%02hhx (%hhu)\n", h->unknown0, h->unknown0);
+ debug(ctx, "direction: 0x%02hhx (%hhu) (%s)\n", h->direction, h->direction,
+ h->direction == AM7XXX_DIRECTION_IN ? "IN" :
+ h->direction == AM7XXX_DIRECTION_OUT ? "OUT" :
+ "UNKNOWN");
debug(ctx, "header_data_len: 0x%02hhx (%hhu)\n", h->header_data_len, h->header_data_len);
debug(ctx, "unknown2: 0x%02hhx (%hhu)\n", h->unknown2, h->unknown2);
debug(ctx, "unknown3: 0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
debug_dump_power_header(ctx, &(h->header_data.power));
break;
+ case AM7XXX_PACKET_TYPE_ZOOM:
+ debug_dump_zoom_header(ctx, &(h->header_data.zoom));
+ break;
+
default:
debug(ctx, "Packet type not supported!\n");
break;
trace_dump_buffer(dev->ctx, "sending -->", buffer, len);
- ret = libusb_bulk_transfer(dev->usb_device, 1, buffer, len, &transferred, 0);
+ ret = libusb_bulk_transfer(dev->usb_device, 0x1, buffer, len, &transferred, 0);
if (ret != 0 || (unsigned int)transferred != len) {
error(dev->ctx, "ret: %d\ttransferred: %d (expected %u)\n",
ret, transferred, len);
return 0;
}
+static void send_data_async_complete_cb(struct libusb_transfer *transfer)
+{
+ am7xxx_device *dev = (am7xxx_device *)(transfer->user_data);
+ int *completed = &(dev->transfer_completed);
+ int transferred = transfer->actual_length;
+ int ret;
+
+ if (transferred != transfer->length) {
+ error(dev->ctx, "transferred: %d (expected %u)\n",
+ transferred, transfer->length);
+ }
+
+ switch (transfer->status) {
+ case LIBUSB_TRANSFER_COMPLETED:
+ ret = 0;
+ break;
+ case LIBUSB_TRANSFER_TIMED_OUT:
+ ret = LIBUSB_ERROR_TIMEOUT;
+ break;
+ case LIBUSB_TRANSFER_STALL:
+ ret = LIBUSB_ERROR_PIPE;
+ break;
+ case LIBUSB_TRANSFER_OVERFLOW:
+ ret = LIBUSB_ERROR_OVERFLOW;
+ break;
+ case LIBUSB_TRANSFER_NO_DEVICE:
+ ret = LIBUSB_ERROR_NO_DEVICE;
+ break;
+ case LIBUSB_TRANSFER_ERROR:
+ case LIBUSB_TRANSFER_CANCELLED:
+ ret = LIBUSB_ERROR_IO;
+ break;
+ default:
+ error(dev->ctx, "unrecognised status code %d", transfer->status);
+ ret = LIBUSB_ERROR_OTHER;
+ }
+
+ if (ret < 0)
+ error(dev->ctx, "libusb transfer failed: %s",
+ libusb_error_name(ret));
+
+ libusb_free_transfer(transfer);
+ transfer = NULL;
+
+ *completed = 1;
+}
+
+static inline void wait_for_trasfer_completed(am7xxx_device *dev)
+{
+ while (!dev->transfer_completed) {
+ int ret = libusb_handle_events_completed(dev->ctx->usb_context,
+ &(dev->transfer_completed));
+ if (ret < 0) {
+ if (ret == LIBUSB_ERROR_INTERRUPTED)
+ continue;
+ error(dev->ctx, "libusb_handle_events failed: %s, cancelling transfer and retrying",
+ libusb_error_name(ret));
+ libusb_cancel_transfer(dev->transfer);
+ continue;
+ }
+ }
+}
+
+static int send_data_async(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
+{
+ int ret;
+ uint8_t *transfer_buffer;
+
+ dev->transfer = libusb_alloc_transfer(0);
+ if (dev->transfer == NULL) {
+ error(dev->ctx, "cannot allocate transfer (%s)\n",
+ strerror(errno));
+ return -ENOMEM;
+ }
+
+ /* Make a copy of the buffer so the caller can safely reuse it just
+ * after libusb_submit_transfer() has returned. This technique
+ * requires more allocations than a proper double-buffering approach
+ * but it takes a lot less code. */
+ transfer_buffer = malloc(len);
+ if (transfer_buffer == NULL) {
+ error(dev->ctx, "cannot allocate transfer buffer (%s)\n",
+ strerror(errno));
+ ret = -ENOMEM;
+ goto err;
+ }
+ memcpy(transfer_buffer, buffer, len);
+
+ dev->transfer->flags |= LIBUSB_TRANSFER_FREE_BUFFER;
+ libusb_fill_bulk_transfer(dev->transfer, dev->usb_device, 0x1,
+ transfer_buffer, len,
+ send_data_async_complete_cb, dev, 0);
+
+ /* wait for the previous transfer to complete */
+ wait_for_trasfer_completed(dev);
+
+ trace_dump_buffer(dev->ctx, "sending -->", buffer, len);
+
+ dev->transfer_completed = 0;
+ ret = libusb_submit_transfer(dev->transfer);
+ if (ret < 0)
+ goto err;
+
+ return 0;
+
+err:
+ libusb_free_transfer(dev->transfer);
+ dev->transfer = NULL;
+ return ret;
+}
+
static void serialize_header(struct am7xxx_header *h, uint8_t *buffer)
{
uint8_t **buffer_iterator = &buffer;
put_le32(h->packet_type, buffer_iterator);
- put_8(h->unknown0, buffer_iterator);
+ put_8(h->direction, buffer_iterator);
put_8(h->header_data_len, buffer_iterator);
put_8(h->unknown2, buffer_iterator);
put_8(h->unknown3, buffer_iterator);
uint8_t **buffer_iterator = &buffer;
h->packet_type = get_le32(buffer_iterator);
- h->unknown0 = get_8(buffer_iterator);
+ h->direction = get_8(buffer_iterator);
h->header_data_len = get_8(buffer_iterator);
h->unknown2 = get_8(buffer_iterator);
h->unknown3 = get_8(buffer_iterator);
unserialize_header(dev->buffer, h);
- debug_dump_header(dev->ctx, h);
+ if (h->direction == AM7XXX_DIRECTION_IN) {
+ ret = 0;
+ } else {
+ error(dev->ctx,
+ "Expected an AM7XXX_DIRECTION_IN packet, got one with direction = %d. Weird!\n",
+ h->direction);
+ ret = -EINVAL;
+ }
- ret = 0;
+ debug_dump_header(dev->ctx, h);
out:
return ret;
debug_dump_header(dev->ctx, h);
+ /* For symmetry with read_header() we should check here for
+ * h->direction == AM7XXX_DIRECTION_OUT but we just ensure that in all
+ * the callers and save some cycles here.
+ */
+
serialize_header(h, dev->buffer);
+
ret = send_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE);
if (ret < 0)
error(dev->ctx, "failed to send data\n");
return ret;
}
+static int send_command(am7xxx_device *dev, am7xxx_packet_type type)
+{
+ struct am7xxx_header h = {
+ .packet_type = type,
+ .direction = AM7XXX_DIRECTION_OUT,
+ .header_data_len = 0x00,
+ .unknown2 = 0x3e,
+ .unknown3 = 0x10,
+ .header_data = {
+ .data = {
+ .field0 = 0,
+ .field1 = 0,
+ .field2 = 0,
+ .field3 = 0,
+ },
+ },
+ };
+
+ return send_header(dev, &h);
+}
+
+
/* When level == AM7XXX_LOG_FATAL do not check the log_level from the context
* and print the message unconditionally, this makes it possible to print
* fatal messages even early on initialization, before the context has been
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;
return NULL;
}
- devices_list = &(ctx->devices_list);
-
new_device = malloc(sizeof(*new_device));
if (new_device == NULL) {
fatal("cannot allocate a new device (%s)\n", strerror(errno));
memset(new_device, 0, sizeof(*new_device));
new_device->ctx = ctx;
+ new_device->desc = desc;
+ new_device->transfer_completed = 1;
+
+ devices_list = &(ctx->devices_list);
if (*devices_list == NULL) {
*devices_list = new_device;
static int scan_devices(am7xxx_context *ctx, scan_op op,
unsigned int open_device_index, am7xxx_device **dev)
{
- int num_devices;
+ ssize_t num_devices;
libusb_device** list;
unsigned int current_index;
int i;
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
goto out;
}
- libusb_set_configuration((*dev)->usb_device, 1);
- 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,
+ (*dev)->desc->configuration);
+ if (ret < 0) {
+ debug(ctx, "libusb_set_configuration failed\n");
+ debug(ctx, "Cannot set configuration %hhu\n",
+ (*dev)->desc->configuration);
+ goto out_libusb_close;
+ }
+
+ ret = libusb_claim_interface((*dev)->usb_device,
+ (*dev)->desc->interface_number);
+ if (ret < 0) {
+ debug(ctx, "libusb_claim_interface failed\n");
+ debug(ctx, "Cannot claim interface %hhu\n",
+ (*dev)->desc->interface_number);
+out_libusb_close:
+ libusb_close((*dev)->usb_device);
+ (*dev)->usb_device = NULL;
+ goto out;
+ }
+
goto out;
}
current_index++;
return ret;
}
-int am7xxx_init(am7xxx_context **ctx)
+/* Device specific operations */
+
+static int default_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
+{
+ int ret;
+ struct am7xxx_header h = {
+ .packet_type = AM7XXX_PACKET_TYPE_POWER,
+ .direction = AM7XXX_DIRECTION_OUT,
+ .header_data_len = sizeof(struct am7xxx_power_header),
+ .unknown2 = 0x3e,
+ .unknown3 = 0x10,
+ };
+
+ switch(power) {
+ case AM7XXX_POWER_OFF:
+ h.header_data.power.bit2 = 0;
+ h.header_data.power.bit1 = 0;
+ h.header_data.power.bit0 = 0;
+ break;
+
+ case AM7XXX_POWER_LOW:
+ h.header_data.power.bit2 = 0;
+ h.header_data.power.bit1 = 0;
+ h.header_data.power.bit0 = 1;
+ break;
+
+ case AM7XXX_POWER_MIDDLE:
+ h.header_data.power.bit2 = 0;
+ h.header_data.power.bit1 = 1;
+ h.header_data.power.bit0 = 0;
+ break;
+
+ case AM7XXX_POWER_HIGH:
+ h.header_data.power.bit2 = 0;
+ h.header_data.power.bit1 = 1;
+ h.header_data.power.bit0 = 1;
+ break;
+
+ case AM7XXX_POWER_TURBO:
+ h.header_data.power.bit2 = 1;
+ h.header_data.power.bit1 = 0;
+ h.header_data.power.bit0 = 0;
+ break;
+
+ default:
+ error(dev->ctx, "Unsupported power mode.\n");
+ return -EINVAL;
+ };
+
+ ret = send_header(dev, &h);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int default_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
{
- int ret = 0;
+ int ret;
+ struct am7xxx_header h = {
+ .packet_type = AM7XXX_PACKET_TYPE_ZOOM,
+ .direction = AM7XXX_DIRECTION_OUT,
+ .header_data_len = sizeof(struct am7xxx_zoom_header),
+ .unknown2 = 0x3e,
+ .unknown3 = 0x10,
+ };
+
+ switch(zoom) {
+ case AM7XXX_ZOOM_ORIGINAL:
+ h.header_data.zoom.bit1 = 0;
+ h.header_data.zoom.bit0 = 0;
+ break;
+
+ case AM7XXX_ZOOM_H:
+ h.header_data.zoom.bit1 = 0;
+ h.header_data.zoom.bit0 = 1;
+ break;
+
+ case AM7XXX_ZOOM_H_V:
+ h.header_data.zoom.bit1 = 1;
+ h.header_data.zoom.bit0 = 0;
+ break;
+
+ case AM7XXX_ZOOM_TEST:
+ h.header_data.zoom.bit1 = 1;
+ h.header_data.zoom.bit0 = 1;
+ break;
+
+ default:
+ error(dev->ctx, "Unsupported zoom mode.\n");
+ return -EINVAL;
+ };
+
+ ret = send_header(dev, &h);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/* Public API */
+
+AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
+{
+ int ret;
*ctx = malloc(sizeof(**ctx));
if (*ctx == NULL) {
if (ret < 0)
goto out_free_context;
- libusb_set_debug((*ctx)->usb_context, 3);
+ libusb_set_debug((*ctx)->usb_context, LIBUSB_LOG_LEVEL_INFO);
ret = scan_devices(*ctx, SCAN_OP_BUILD_DEVLIST , 0, NULL);
if (ret < 0) {
return ret;
}
-void am7xxx_shutdown(am7xxx_context *ctx)
+AM7XXX_PUBLIC void am7xxx_shutdown(am7xxx_context *ctx)
{
am7xxx_device *current;
while (current) {
am7xxx_device *next = current->next;
am7xxx_close_device(current);
+ free(current->device_info);
free(current);
current = next;
}
ctx = NULL;
}
-void am7xxx_set_log_level(am7xxx_context *ctx, am7xxx_log_level log_level)
+AM7XXX_PUBLIC void am7xxx_set_log_level(am7xxx_context *ctx, am7xxx_log_level log_level)
{
ctx->log_level = log_level;
}
-int am7xxx_open_device(am7xxx_context *ctx, am7xxx_device **dev,
+AM7XXX_PUBLIC int am7xxx_open_device(am7xxx_context *ctx, am7xxx_device **dev,
unsigned int device_index)
{
int ret;
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;
}
-int am7xxx_close_device(am7xxx_device *dev)
+AM7XXX_PUBLIC int am7xxx_close_device(am7xxx_device *dev)
{
if (dev == NULL) {
fatal("dev must not be NULL!\n");
return -EINVAL;
}
if (dev->usb_device) {
- libusb_release_interface(dev->usb_device, 0);
+ wait_for_trasfer_completed(dev);
+ libusb_release_interface(dev->usb_device, dev->desc->interface_number);
libusb_close(dev->usb_device);
dev->usb_device = NULL;
}
return 0;
}
-int am7xxx_get_device_info(am7xxx_device *dev,
+AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
am7xxx_device_info *device_info)
{
int ret;
- struct am7xxx_header h = {
- .packet_type = AM7XXX_PACKET_TYPE_DEVINFO,
- .unknown0 = 0x00,
- .header_data_len = 0x00,
- .unknown2 = 0x3e,
- .unknown3 = 0x10,
- .header_data = {
- .devinfo = {
- .native_width = 0,
- .native_height = 0,
- .unknown0 = 0,
- .unknown1 = 0,
- },
- },
- };
+ struct am7xxx_header h = { 0 };
- ret = send_header(dev, &h);
+ if (dev->device_info) {
+ memcpy(device_info, dev->device_info, sizeof(*device_info));
+ return 0;
+ }
+
+ ret = send_command(dev, AM7XXX_PACKET_TYPE_DEVINFO);
if (ret < 0)
return ret;
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;
}
-int am7xxx_send_image(am7xxx_device *dev,
+AM7XXX_PUBLIC int am7xxx_calc_scaled_image_dimensions(am7xxx_device *dev,
+ unsigned int upscale,
+ unsigned int original_width,
+ unsigned int original_height,
+ unsigned int *scaled_width,
+ unsigned int *scaled_height)
+{
+
+ am7xxx_device_info device_info;
+ float width_ratio;
+ float height_ratio;
+ int ret;
+
+ ret = am7xxx_get_device_info(dev, &device_info);
+ if (ret < 0) {
+ error(dev->ctx, "cannot get device info\n");
+ return ret;
+ }
+
+ /*
+ * Check if we need to rescale; if the input image fits the native
+ * dimensions there is no need to, unless we want to upscale.
+ */
+ if (!upscale &&
+ original_width <= device_info.native_width &&
+ original_height <= device_info.native_height ) {
+ debug(dev->ctx, "CASE 0, no rescaling, the original image fits already\n");
+ *scaled_width = original_width;
+ *scaled_height = original_height;
+ return 0;
+ }
+
+ /* Input dimensions relative to the device native dimensions */
+ width_ratio = (float)original_width / device_info.native_width;
+ height_ratio = (float)original_height / device_info.native_height;
+
+ if (width_ratio > height_ratio) {
+ /*
+ * The input is proportionally "wider" than the device viewport
+ * so its height needs to be adjusted
+ */
+ debug(dev->ctx, "CASE 1, original image wider, adjust the scaled height\n");
+ *scaled_width = device_info.native_width;
+ *scaled_height = (unsigned int)lroundf(original_height / width_ratio);
+ } else if (width_ratio < height_ratio) {
+ /*
+ * The input is proportionally "taller" than the device viewport
+ * so its width needs to be adjusted
+ */
+ debug(dev->ctx, "CASE 2 original image taller, adjust the scaled width\n");
+ *scaled_width = (unsigned int)lroundf(original_width / height_ratio);
+ *scaled_height = device_info.native_height;
+ } else {
+ debug(dev->ctx, "CASE 3, just rescale, same aspect ratio already\n");
+ *scaled_width = device_info.native_width;
+ *scaled_height = device_info.native_height;
+ }
+ debug(dev->ctx, "scaled dimensions: %dx%d\n", *scaled_width, *scaled_height);
+
+ return 0;
+}
+
+AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev,
am7xxx_image_format format,
unsigned int width,
unsigned int height,
int ret;
struct am7xxx_header h = {
.packet_type = AM7XXX_PACKET_TYPE_IMAGE,
- .unknown0 = 0x00,
+ .direction = AM7XXX_DIRECTION_OUT,
.header_data_len = sizeof(struct am7xxx_image_header),
.unknown2 = 0x3e,
.unknown3 = 0x10,
return send_data(dev, image, image_size);
}
-int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode mode)
+AM7XXX_PUBLIC int am7xxx_send_image_async(am7xxx_device *dev,
+ am7xxx_image_format format,
+ unsigned int width,
+ unsigned int height,
+ uint8_t *image,
+ unsigned int image_size)
{
int ret;
struct am7xxx_header h = {
- .packet_type = AM7XXX_PACKET_TYPE_POWER,
- .unknown0 = 0x00,
- .header_data_len = sizeof(struct am7xxx_power_header),
+ .packet_type = AM7XXX_PACKET_TYPE_IMAGE,
+ .direction = AM7XXX_DIRECTION_OUT,
+ .header_data_len = sizeof(struct am7xxx_image_header),
.unknown2 = 0x3e,
.unknown3 = 0x10,
+ .header_data = {
+ .image = {
+ .format = format,
+ .width = width,
+ .height = height,
+ .image_size = image_size,
+ },
+ },
};
- switch(mode) {
- case AM7XXX_POWER_OFF:
- h.header_data.power.bit2 = 0;
- h.header_data.power.bit1 = 0;
- h.header_data.power.bit0 = 0;
- break;
-
- case AM7XXX_POWER_LOW:
- h.header_data.power.bit2 = 0;
- h.header_data.power.bit1 = 0;
- h.header_data.power.bit0 = 1;
+ ret = send_header(dev, &h);
+ if (ret < 0)
+ return ret;
- case AM7XXX_POWER_MIDDLE:
- h.header_data.power.bit2 = 0;
- h.header_data.power.bit1 = 1;
- h.header_data.power.bit0 = 0;
- break;
+ if (image == NULL || image_size == 0) {
+ warning(dev->ctx, "Not sending any data, check the 'image' or 'image_size' parameters\n");
+ return 0;
+ }
- case AM7XXX_POWER_HIGH:
- h.header_data.power.bit2 = 0;
- h.header_data.power.bit1 = 1;
- h.header_data.power.bit0 = 1;
- break;
+ return send_data_async(dev, image, image_size);
+}
- case AM7XXX_POWER_TURBO:
- h.header_data.power.bit2 = 1;
- h.header_data.power.bit1 = 0;
- h.header_data.power.bit0 = 0;
- break;
+AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
+{
+ if (dev->desc->ops.set_power_mode == NULL) {
+ warning(dev->ctx,
+ "setting power mode is unsupported on this device\n");
+ return 0;
+ }
- default:
- error(dev->ctx, "Power mode not supported!\n");
- return -EINVAL;
- };
+ return dev->desc->ops.set_power_mode(dev, power);
+}
- ret = send_header(dev, &h);
- if (ret < 0)
- return ret;
+AM7XXX_PUBLIC int am7xxx_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
+{
+ if (dev->desc->ops.set_zoom_mode == NULL) {
+ warning(dev->ctx,
+ "setting zoom mode is unsupported on this device\n");
+ return 0;
+ }
- return 0;
+ return dev->desc->ops.set_zoom_mode(dev, zoom);
}
projects / libam7xxx.git / blobdiff