#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,
};
/* 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
(void)ctx;
(void)h;
}
+
static void trace_dump_buffer(am7xxx_context *ctx, const char *message,
uint8_t *buffer, unsigned int len)
{
* device with index 'open_device_index' and returns the correspondent
* am7xxx_device in the 'dev' parameter; the function returns 0 on success,
* 1 if the device was already open and a negative value on error.
- *
+ *
* NOTES:
* if scan_devices() fails when called with 'op' == SCAN_OP_BUILD_DEVLIST,
* the caller might want to call am7xxx_shutdown() in order to remove
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,
- unsigned int *native_width,
- unsigned int *native_height,
- unsigned int *unknown0,
- unsigned int *unknown1)
+AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
+ am7xxx_device_info *device_info)
{
int ret;
struct am7xxx_header h = {
if (ret < 0)
return ret;
- *native_width = h.header_data.devinfo.native_width;
- *native_height = h.header_data.devinfo.native_height;
- *unknown0 = h.header_data.devinfo.unknown0;
- *unknown1 = h.header_data.devinfo.unknown1;
+ device_info->native_width = h.header_data.devinfo.native_width;
+ 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;
+#endif
+
+ return 0;
+}
+
+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;
}
-int am7xxx_send_image(am7xxx_device *dev,
+AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev,
am7xxx_image_format format,
unsigned int width,
unsigned int height,
uint8_t *image,
- unsigned int size)
+ unsigned int image_size)
{
int ret;
struct am7xxx_header h = {
.format = format,
.width = width,
.height = height,
- .image_size = size,
+ .image_size = image_size,
},
},
};
if (ret < 0)
return ret;
- if (image == NULL || size == 0) {
- warning(dev->ctx, "Not sending any data, check the 'data' or 'size' parameters\n");
+ if (image == NULL || image_size == 0) {
+ warning(dev->ctx, "Not sending any data, check the 'image' or 'image_size' parameters\n");
return 0;
}
- return send_data(dev, image, size);
+ 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 = {
projects / libam7xxx.git / blobdiff