#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,
.product_id = 0xc101,
},
{
+ .name = "Acer C112",
+ .vendor_id = 0x1de1,
+ .product_id = 0x5501,
+ },
+ {
+ .name ="Aiptek PocketCinema T25",
+ .vendor_id = 0x08ca,
+ .product_id = 0x2144,
+ },
+ {
.name = "Philips/Sagemcom PicoPix 1020",
.vendor_id = 0x21e7,
.product_id = 0x000e,
};
/* 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
* 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;
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)\n", h->direction, h->direction);
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);
(void)ctx;
(void)h;
}
+
static void trace_dump_buffer(am7xxx_context *ctx, const char *message,
uint8_t *buffer, unsigned int len)
{
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);
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);
debug_dump_header(dev->ctx, h);
- ret = 0;
+ if (h->direction == AM7XXX_DIRECTION_IN) {
+ ret = 0;
+ } else {
+ error(dev->ctx,
+ "Received a packet with direction AM7XXX_DIRECTION_OUT, weird!\n");
+ ret = -EINVAL;
+ }
out:
return ret;
goto out;
}
- libusb_set_configuration((*dev)->usb_device, 1);
+ libusb_set_configuration((*dev)->usb_device, 2);
libusb_claim_interface((*dev)->usb_device, 0);
goto out;
}
return ret;
}
-int am7xxx_init(am7xxx_context **ctx)
+/* Public API */
+
+AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
{
int ret = 0;
return ret;
}
-void am7xxx_shutdown(am7xxx_context *ctx)
+AM7XXX_PUBLIC void am7xxx_shutdown(am7xxx_context *ctx)
{
am7xxx_device *current;
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;
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 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,
+ .direction = AM7XXX_DIRECTION_OUT,
.header_data_len = 0x00,
.unknown2 = 0x3e,
.unknown3 = 0x10,
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_set_power_mode(am7xxx_device *dev, am7xxx_power_mode mode)
{
int ret;
struct am7xxx_header h = {
.packet_type = AM7XXX_PACKET_TYPE_POWER,
- .unknown0 = 0x00,
+ .direction = AM7XXX_DIRECTION_OUT,
.header_data_len = sizeof(struct am7xxx_power_header),
.unknown2 = 0x3e,
.unknown3 = 0x10,
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;
projects / libam7xxx.git / blobdiff