X-Git-Url: https://git.ao2.it/libam7xxx.git/blobdiff_plain/a09eb6616f4c6c67d4de4c8b72d9072f787ad2de..e2c8afa72334152016d1344217839abe54718a77:/src/am7xxx.c?ds=inline diff --git a/src/am7xxx.c b/src/am7xxx.c index 48704de..d22a417 100644 --- a/src/am7xxx.c +++ b/src/am7xxx.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "am7xxx.h" #include "serialize.h" @@ -35,6 +36,20 @@ # 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, @@ -69,7 +84,7 @@ static struct am7xxx_usb_device_descriptor supported_devices[] = { }; /* 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 @@ -244,6 +259,7 @@ static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h) (void)ctx; (void)h; } + static void trace_dump_buffer(am7xxx_context *ctx, const char *message, uint8_t *buffer, unsigned int len) { @@ -278,7 +294,7 @@ static int send_data(am7xxx_device *dev, 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); @@ -445,7 +461,7 @@ typedef enum { * 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 @@ -526,7 +542,7 @@ static int scan_devices(am7xxx_context *ctx, scan_op op, 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; } @@ -549,7 +565,9 @@ out: return ret; } -int am7xxx_init(am7xxx_context **ctx) +/* Public API */ + +AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx) { int ret = 0; @@ -588,7 +606,7 @@ out: return ret; } -void am7xxx_shutdown(am7xxx_context *ctx) +AM7XXX_PUBLIC void am7xxx_shutdown(am7xxx_context *ctx) { am7xxx_device *current; @@ -610,12 +628,12 @@ void am7xxx_shutdown(am7xxx_context *ctx) 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; @@ -637,7 +655,7 @@ int am7xxx_open_device(am7xxx_context *ctx, am7xxx_device **dev, 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"); @@ -651,7 +669,7 @@ int am7xxx_close_device(am7xxx_device *dev) 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; @@ -690,12 +708,74 @@ int am7xxx_get_device_info(am7xxx_device *dev, 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, uint8_t *image, - unsigned int size) + unsigned int image_size) { int ret; struct am7xxx_header h = { @@ -709,7 +789,7 @@ int am7xxx_send_image(am7xxx_device *dev, .format = format, .width = width, .height = height, - .image_size = size, + .image_size = image_size, }, }, }; @@ -718,15 +798,15 @@ int am7xxx_send_image(am7xxx_device *dev, 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 = {