1 /* am7xxx - communication with AM7xxx based USB Pico Projectors and DPFs
3 * Copyright (C) 2012 Antonio Ospite <ospite@studenti.unina.it>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 #include "serialize.h"
30 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
32 /* If we're not using GNU C, elide __attribute__
33 * taken from: http://unixwiz.net/techtips/gnu-c-attributes.html)
36 # define __attribute__(x) /*NOTHING*/
39 /* Control shared library symbols visibility */
40 #if defined _WIN32 || defined __CYGWIN__
41 #define AM7XXX_PUBLIC __declspec(dllexport)
45 #define AM7XXX_PUBLIC __attribute__ ((visibility ("default")))
46 #define AM7XXX_LOCAL __attribute__ ((visibility ("hidden")))
53 static void log_message(am7xxx_context *ctx,
58 ...) __attribute__ ((format (printf, 5, 6)));
60 #define fatal(...) log_message(NULL, AM7XXX_LOG_FATAL, __func__, __LINE__, __VA_ARGS__)
61 #define error(ctx, ...) log_message(ctx, AM7XXX_LOG_ERROR, __func__, __LINE__, __VA_ARGS__)
62 #define warning(ctx, ...) log_message(ctx, AM7XXX_LOG_WARNING, __func__, 0, __VA_ARGS__)
63 #define info(ctx, ...) log_message(ctx, AM7XXX_LOG_INFO, __func__, 0, __VA_ARGS__)
64 #define debug(ctx, ...) log_message(ctx, AM7XXX_LOG_DEBUG, __func__, 0, __VA_ARGS__)
65 #define trace(ctx, ...) log_message(ctx, AM7XXX_LOG_TRACE, NULL, 0, __VA_ARGS__)
68 int (*set_power_mode)(am7xxx_device *dev, am7xxx_power_mode power);
69 int (*set_zoom_mode)(am7xxx_device *dev, am7xxx_zoom_mode zoom);
72 struct am7xxx_usb_device_descriptor {
76 uint8_t configuration; /* The bConfigurationValue of the device */
77 uint8_t interface_number; /* The bInterfaceNumber of the device */
78 struct am7xxx_ops ops;
81 static int default_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power);
82 static int default_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom);
84 #define DEFAULT_OPS { \
85 .set_power_mode = default_set_power_mode, \
86 .set_zoom_mode = default_set_zoom_mode, \
89 static const struct am7xxx_usb_device_descriptor supported_devices[] = {
95 .interface_number = 0,
101 .product_id = 0x5501,
103 .interface_number = 0,
107 .name ="Aiptek PocketCinema T25",
109 .product_id = 0x2144,
111 .interface_number = 0,
115 .name = "Philips/Sagemcom PicoPix 1020",
117 .product_id = 0x000e,
119 .interface_number = 0,
123 .name = "Philips/Sagemcom PicoPix 2055",
125 .product_id = 0x0016,
127 .interface_number = 0,
130 .name = "Philips/Sagemcom PicoPix 2330",
132 .product_id = 0x0019,
134 .interface_number = 0,
138 /* The header size on the wire is known to be always 24 bytes, regardless of
139 * the memory configuration enforced by different architectures or compilers
140 * for struct am7xxx_header
142 #define AM7XXX_HEADER_WIRE_SIZE 24
144 struct _am7xxx_device {
145 libusb_device_handle *usb_device;
146 struct libusb_transfer *transfer;
147 int transfer_completed;
148 uint8_t buffer[AM7XXX_HEADER_WIRE_SIZE];
149 am7xxx_device_info *device_info;
151 const struct am7xxx_usb_device_descriptor *desc;
155 struct _am7xxx_context {
156 libusb_context *usb_context;
158 am7xxx_device *devices_list;
162 AM7XXX_PACKET_TYPE_DEVINFO = 0x01,
163 AM7XXX_PACKET_TYPE_IMAGE = 0x02,
164 AM7XXX_PACKET_TYPE_POWER = 0x04,
165 AM7XXX_PACKET_TYPE_ZOOM = 0x05,
166 } am7xxx_packet_type;
168 struct am7xxx_generic_header {
175 struct am7xxx_devinfo_header {
176 uint32_t native_width;
177 uint32_t native_height;
182 struct am7xxx_image_header {
189 struct am7xxx_power_header {
195 struct am7xxx_zoom_header {
201 * Examples of packet headers:
204 * 02 00 00 00 00 10 3e 10 01 00 00 00 20 03 00 00 e0 01 00 00 53 E8 00 00
207 * 04 00 00 00 00 0c ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
210 /* Direction of the communication from the host point of view */
211 #define AM7XXX_DIRECTION_OUT 0 /* host -> device */
212 #define AM7XXX_DIRECTION_IN 1 /* host <- device */
214 struct am7xxx_header {
215 uint32_t packet_type;
217 uint8_t header_data_len;
221 struct am7xxx_generic_header data;
222 struct am7xxx_devinfo_header devinfo;
223 struct am7xxx_image_header image;
224 struct am7xxx_power_header power;
225 struct am7xxx_zoom_header zoom;
231 static void debug_dump_devinfo_header(am7xxx_context *ctx, struct am7xxx_devinfo_header *d)
233 if (ctx == NULL || d == NULL)
236 debug(ctx, "Info header:\n");
237 debug(ctx, "\tnative_width: 0x%08x (%u)\n", d->native_width, d->native_width);
238 debug(ctx, "\tnative_height: 0x%08x (%u)\n", d->native_height, d->native_height);
239 debug(ctx, "\tunknown0: 0x%08x (%u)\n", d->unknown0, d->unknown0);
240 debug(ctx, "\tunknown1: 0x%08x (%u)\n", d->unknown1, d->unknown1);
243 static void debug_dump_image_header(am7xxx_context *ctx, struct am7xxx_image_header *i)
245 if (ctx == NULL || i == NULL)
248 debug(ctx, "Image header:\n");
249 debug(ctx, "\tformat: 0x%08x (%u)\n", i->format, i->format);
250 debug(ctx, "\twidth: 0x%08x (%u)\n", i->width, i->width);
251 debug(ctx, "\theight: 0x%08x (%u)\n", i->height, i->height);
252 debug(ctx, "\timage size: 0x%08x (%u)\n", i->image_size, i->image_size);
255 static void debug_dump_power_header(am7xxx_context *ctx, struct am7xxx_power_header *p)
257 if (ctx == NULL || p == NULL)
260 debug(ctx, "Power header:\n");
261 debug(ctx, "\tbit2: 0x%08x (%u)\n", p->bit2, p->bit2);
262 debug(ctx, "\tbit1: 0x%08x (%u)\n", p->bit1, p->bit1);
263 debug(ctx, "\tbit0: 0x%08x (%u)\n", p->bit0, p->bit0);
266 static void debug_dump_zoom_header(am7xxx_context *ctx, struct am7xxx_zoom_header *z)
268 if (ctx == NULL || z == NULL)
271 debug(ctx, "Zoom header:\n");
272 debug(ctx, "\tbit1: 0x%08x (%u)\n", z->bit1, z->bit1);
273 debug(ctx, "\tbit0: 0x%08x (%u)\n", z->bit0, z->bit0);
276 static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
278 if (ctx == NULL || h == NULL)
281 debug(ctx, "BEGIN\n");
282 debug(ctx, "packet_type: 0x%08x (%u)\n", h->packet_type, h->packet_type);
283 debug(ctx, "direction: 0x%02hhx (%hhu) (%s)\n", h->direction, h->direction,
284 h->direction == AM7XXX_DIRECTION_IN ? "IN" :
285 h->direction == AM7XXX_DIRECTION_OUT ? "OUT" :
287 debug(ctx, "header_data_len: 0x%02hhx (%hhu)\n", h->header_data_len, h->header_data_len);
288 debug(ctx, "unknown2: 0x%02hhx (%hhu)\n", h->unknown2, h->unknown2);
289 debug(ctx, "unknown3: 0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
291 switch(h->packet_type) {
292 case AM7XXX_PACKET_TYPE_DEVINFO:
293 debug_dump_devinfo_header(ctx, &(h->header_data.devinfo));
296 case AM7XXX_PACKET_TYPE_IMAGE:
297 debug_dump_image_header(ctx, &(h->header_data.image));
300 case AM7XXX_PACKET_TYPE_POWER:
301 debug_dump_power_header(ctx, &(h->header_data.power));
304 case AM7XXX_PACKET_TYPE_ZOOM:
305 debug_dump_zoom_header(ctx, &(h->header_data.zoom));
309 debug(ctx, "Packet type not supported!\n");
312 debug(ctx, "END\n\n");
315 static inline unsigned int in_80chars(unsigned int i)
317 /* The 3 below is the length of "xx " where xx is the hex string
318 * representation of a byte */
319 return ((i+1) % (80/3));
322 static void trace_dump_buffer(am7xxx_context *ctx, const char *message,
323 uint8_t *buffer, unsigned int len)
327 if (ctx == NULL || buffer == NULL || len == 0)
332 trace(ctx, "%s\n", message);
334 for (i = 0; i < len; i++) {
335 trace(ctx, "%02hhX%c", buffer[i], (in_80chars(i) && (i < len - 1)) ? ' ' : '\n');
340 static void debug_dump_header(am7xxx_context *ctx, struct am7xxx_header *h)
346 static void trace_dump_buffer(am7xxx_context *ctx, const char *message,
347 uint8_t *buffer, unsigned int len)
356 static int read_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
361 ret = libusb_bulk_transfer(dev->usb_device, 0x81, buffer, len, &transferred, 0);
362 if (ret != 0 || (unsigned int)transferred != len) {
363 error(dev->ctx, "ret: %d\ttransferred: %d (expected %u)\n",
364 ret, transferred, len);
368 trace_dump_buffer(dev->ctx, "<-- received", buffer, len);
373 static int send_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
378 trace_dump_buffer(dev->ctx, "sending -->", buffer, len);
380 ret = libusb_bulk_transfer(dev->usb_device, 0x1, buffer, len, &transferred, 0);
381 if (ret != 0 || (unsigned int)transferred != len) {
382 error(dev->ctx, "ret: %d\ttransferred: %d (expected %u)\n",
383 ret, transferred, len);
390 static void send_data_async_complete_cb(struct libusb_transfer *transfer)
392 am7xxx_device *dev = (am7xxx_device *)(transfer->user_data);
393 int *completed = &(dev->transfer_completed);
394 int transferred = transfer->actual_length;
397 if (transferred != transfer->length) {
398 error(dev->ctx, "transferred: %d (expected %u)\n",
399 transferred, transfer->length);
402 switch (transfer->status) {
403 case LIBUSB_TRANSFER_COMPLETED:
406 case LIBUSB_TRANSFER_TIMED_OUT:
407 ret = LIBUSB_ERROR_TIMEOUT;
409 case LIBUSB_TRANSFER_STALL:
410 ret = LIBUSB_ERROR_PIPE;
412 case LIBUSB_TRANSFER_OVERFLOW:
413 ret = LIBUSB_ERROR_OVERFLOW;
415 case LIBUSB_TRANSFER_NO_DEVICE:
416 ret = LIBUSB_ERROR_NO_DEVICE;
418 case LIBUSB_TRANSFER_ERROR:
419 case LIBUSB_TRANSFER_CANCELLED:
420 ret = LIBUSB_ERROR_IO;
423 error(dev->ctx, "unrecognised status code %d", transfer->status);
424 ret = LIBUSB_ERROR_OTHER;
428 error(dev->ctx, "libusb transfer failed: %s",
429 libusb_error_name(ret));
431 libusb_free_transfer(transfer);
437 static inline void wait_for_trasfer_completed(am7xxx_device *dev)
439 while (!dev->transfer_completed) {
440 int ret = libusb_handle_events_completed(dev->ctx->usb_context,
441 &(dev->transfer_completed));
443 if (ret == LIBUSB_ERROR_INTERRUPTED)
445 error(dev->ctx, "libusb_handle_events failed: %s, cancelling transfer and retrying",
446 libusb_error_name(ret));
447 libusb_cancel_transfer(dev->transfer);
453 static int send_data_async(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
456 uint8_t *transfer_buffer;
458 dev->transfer = libusb_alloc_transfer(0);
459 if (dev->transfer == NULL) {
460 error(dev->ctx, "cannot allocate transfer (%s)\n",
465 /* Make a copy of the buffer so the caller can safely reuse it just
466 * after libusb_submit_transfer() has returned. This technique
467 * requires more allocations than a proper double-buffering approach
468 * but it takes a lot less code. */
469 transfer_buffer = malloc(len);
470 if (transfer_buffer == NULL) {
471 error(dev->ctx, "cannot allocate transfer buffer (%s)\n",
476 memcpy(transfer_buffer, buffer, len);
478 dev->transfer->flags |= LIBUSB_TRANSFER_FREE_BUFFER;
479 libusb_fill_bulk_transfer(dev->transfer, dev->usb_device, 0x1,
480 transfer_buffer, len,
481 send_data_async_complete_cb, dev, 0);
483 /* wait for the previous transfer to complete */
484 wait_for_trasfer_completed(dev);
486 trace_dump_buffer(dev->ctx, "sending -->", buffer, len);
488 dev->transfer_completed = 0;
489 ret = libusb_submit_transfer(dev->transfer);
496 libusb_free_transfer(dev->transfer);
497 dev->transfer = NULL;
501 static void serialize_header(struct am7xxx_header *h, uint8_t *buffer)
503 uint8_t **buffer_iterator = &buffer;
505 put_le32(h->packet_type, buffer_iterator);
506 put_8(h->direction, buffer_iterator);
507 put_8(h->header_data_len, buffer_iterator);
508 put_8(h->unknown2, buffer_iterator);
509 put_8(h->unknown3, buffer_iterator);
510 put_le32(h->header_data.data.field0, buffer_iterator);
511 put_le32(h->header_data.data.field1, buffer_iterator);
512 put_le32(h->header_data.data.field2, buffer_iterator);
513 put_le32(h->header_data.data.field3, buffer_iterator);
516 static void unserialize_header(uint8_t *buffer, struct am7xxx_header *h)
518 uint8_t **buffer_iterator = &buffer;
520 h->packet_type = get_le32(buffer_iterator);
521 h->direction = get_8(buffer_iterator);
522 h->header_data_len = get_8(buffer_iterator);
523 h->unknown2 = get_8(buffer_iterator);
524 h->unknown3 = get_8(buffer_iterator);
525 h->header_data.data.field0 = get_le32(buffer_iterator);
526 h->header_data.data.field1 = get_le32(buffer_iterator);
527 h->header_data.data.field2 = get_le32(buffer_iterator);
528 h->header_data.data.field3 = get_le32(buffer_iterator);
531 static int read_header(am7xxx_device *dev, struct am7xxx_header *h)
535 ret = read_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE);
539 unserialize_header(dev->buffer, h);
541 if (h->direction == AM7XXX_DIRECTION_IN) {
545 "Expected an AM7XXX_DIRECTION_IN packet, got one with direction = %d. Weird!\n",
550 debug_dump_header(dev->ctx, h);
556 static int send_header(am7xxx_device *dev, struct am7xxx_header *h)
560 debug_dump_header(dev->ctx, h);
562 /* For symmetry with read_header() we should check here for
563 * h->direction == AM7XXX_DIRECTION_OUT but we just ensure that in all
564 * the callers and save some cycles here.
567 serialize_header(h, dev->buffer);
569 ret = send_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE);
571 error(dev->ctx, "failed to send data\n");
576 /* When level == AM7XXX_LOG_FATAL do not check the log_level from the context
577 * and print the message unconditionally, this makes it possible to print
578 * fatal messages even early on initialization, before the context has been
580 static void log_message(am7xxx_context *ctx,
582 const char *function,
589 if (level == AM7XXX_LOG_FATAL || (ctx && level <= ctx->log_level)) {
591 fprintf(stderr, "%s", function);
593 fprintf(stderr, "[%d]", line);
594 fprintf(stderr, ": ");
598 vfprintf(stderr, fmt, ap);
605 static am7xxx_device *add_new_device(am7xxx_context *ctx,
606 const struct am7xxx_usb_device_descriptor *desc)
608 am7xxx_device **devices_list;
609 am7xxx_device *new_device;
612 fatal("context must not be NULL!\n");
616 new_device = malloc(sizeof(*new_device));
617 if (new_device == NULL) {
618 fatal("cannot allocate a new device (%s)\n", strerror(errno));
621 memset(new_device, 0, sizeof(*new_device));
623 new_device->ctx = ctx;
624 new_device->desc = desc;
625 new_device->transfer_completed = 1;
627 devices_list = &(ctx->devices_list);
629 if (*devices_list == NULL) {
630 *devices_list = new_device;
632 am7xxx_device *prev = *devices_list;
635 prev->next = new_device;
640 static am7xxx_device *find_device(am7xxx_context *ctx,
641 unsigned int device_index)
644 am7xxx_device *current;
647 fatal("context must not be NULL!\n");
651 current = ctx->devices_list;
652 while (current && i++ < device_index)
653 current = current->next;
659 SCAN_OP_BUILD_DEVLIST,
664 * This is where the central logic of multi-device support is.
666 * When 'op' == SCAN_OP_BUILD_DEVLIST the parameters 'open_device_index' and
667 * 'dev' are ignored; the function returns 0 on success and a negative value
670 * When 'op' == SCAN_OP_OPEN_DEVICE the function opens the supported USB
671 * device with index 'open_device_index' and returns the correspondent
672 * am7xxx_device in the 'dev' parameter; the function returns 0 on success,
673 * 1 if the device was already open and a negative value on error.
676 * if scan_devices() fails when called with 'op' == SCAN_OP_BUILD_DEVLIST,
677 * the caller might want to call am7xxx_shutdown() in order to remove
678 * devices possibly added before the failure.
680 static int scan_devices(am7xxx_context *ctx, scan_op op,
681 unsigned int open_device_index, am7xxx_device **dev)
684 libusb_device** list;
685 unsigned int current_index;
690 fatal("context must not be NULL!\n");
693 if (op == SCAN_OP_BUILD_DEVLIST && ctx->devices_list != NULL) {
694 error(ctx, "device scan done already? Abort!\n");
698 num_devices = libusb_get_device_list(ctx->usb_context, &list);
699 if (num_devices < 0) {
705 for (i = 0; i < num_devices; i++) {
706 struct libusb_device_descriptor desc;
709 ret = libusb_get_device_descriptor(list[i], &desc);
713 for (j = 0; j < ARRAY_SIZE(supported_devices); j++) {
714 if (desc.idVendor == supported_devices[j].vendor_id &&
715 desc.idProduct == supported_devices[j].product_id) {
717 if (op == SCAN_OP_BUILD_DEVLIST) {
718 am7xxx_device *new_device;
719 info(ctx, "am7xxx device found, index: %d, name: %s\n",
721 supported_devices[j].name);
722 new_device = add_new_device(ctx, &supported_devices[j]);
723 if (new_device == NULL) {
724 /* XXX, the caller may want
725 * to call am7xxx_shutdown() if
726 * we fail here, as we may have
727 * added some devices already
729 debug(ctx, "Cannot create a new device\n");
733 } else if (op == SCAN_OP_OPEN_DEVICE &&
734 current_index == open_device_index) {
736 *dev = find_device(ctx, open_device_index);
742 /* the usb device has already been opened */
743 if ((*dev)->usb_device) {
744 debug(ctx, "(*dev)->usb_device already set\n");
749 ret = libusb_open(list[i], &((*dev)->usb_device));
751 debug(ctx, "libusb_open failed\n");
755 /* XXX, the device is now open, if any
756 * of the calls below fail we need to
757 * close it again before bailing out.
760 ret = libusb_set_configuration((*dev)->usb_device,
761 (*dev)->desc->configuration);
763 debug(ctx, "libusb_set_configuration failed\n");
764 debug(ctx, "Cannot set configuration %hhu\n",
765 (*dev)->desc->configuration);
766 goto out_libusb_close;
769 ret = libusb_claim_interface((*dev)->usb_device,
770 (*dev)->desc->interface_number);
772 debug(ctx, "libusb_claim_interface failed\n");
773 debug(ctx, "Cannot claim interface %hhu\n",
774 (*dev)->desc->interface_number);
776 libusb_close((*dev)->usb_device);
777 (*dev)->usb_device = NULL;
788 /* if we made it up to here we didn't find any device to open */
789 if (op == SCAN_OP_OPEN_DEVICE) {
790 error(ctx, "Cannot find any device to open\n");
795 /* everything went fine when building the device list */
798 libusb_free_device_list(list, 1);
802 /* Device specific operations */
804 static int default_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
807 struct am7xxx_header h = {
808 .packet_type = AM7XXX_PACKET_TYPE_POWER,
809 .direction = AM7XXX_DIRECTION_OUT,
810 .header_data_len = sizeof(struct am7xxx_power_header),
816 case AM7XXX_POWER_OFF:
817 h.header_data.power.bit2 = 0;
818 h.header_data.power.bit1 = 0;
819 h.header_data.power.bit0 = 0;
822 case AM7XXX_POWER_LOW:
823 h.header_data.power.bit2 = 0;
824 h.header_data.power.bit1 = 0;
825 h.header_data.power.bit0 = 1;
828 case AM7XXX_POWER_MIDDLE:
829 h.header_data.power.bit2 = 0;
830 h.header_data.power.bit1 = 1;
831 h.header_data.power.bit0 = 0;
834 case AM7XXX_POWER_HIGH:
835 h.header_data.power.bit2 = 0;
836 h.header_data.power.bit1 = 1;
837 h.header_data.power.bit0 = 1;
840 case AM7XXX_POWER_TURBO:
841 h.header_data.power.bit2 = 1;
842 h.header_data.power.bit1 = 0;
843 h.header_data.power.bit0 = 0;
847 error(dev->ctx, "Unsupported power mode.\n");
851 ret = send_header(dev, &h);
858 static int default_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
861 struct am7xxx_header h = {
862 .packet_type = AM7XXX_PACKET_TYPE_ZOOM,
863 .direction = AM7XXX_DIRECTION_OUT,
864 .header_data_len = sizeof(struct am7xxx_zoom_header),
870 case AM7XXX_ZOOM_ORIGINAL:
871 h.header_data.zoom.bit1 = 0;
872 h.header_data.zoom.bit0 = 0;
876 h.header_data.zoom.bit1 = 0;
877 h.header_data.zoom.bit0 = 1;
880 case AM7XXX_ZOOM_H_V:
881 h.header_data.zoom.bit1 = 1;
882 h.header_data.zoom.bit0 = 0;
885 case AM7XXX_ZOOM_TEST:
886 h.header_data.zoom.bit1 = 1;
887 h.header_data.zoom.bit0 = 1;
891 error(dev->ctx, "Unsupported zoom mode.\n");
895 ret = send_header(dev, &h);
904 AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
908 *ctx = malloc(sizeof(**ctx));
910 fatal("cannot allocate the context (%s)\n", strerror(errno));
914 memset(*ctx, 0, sizeof(**ctx));
916 /* Set the highest log level during initialization */
917 (*ctx)->log_level = AM7XXX_LOG_TRACE;
919 ret = libusb_init(&((*ctx)->usb_context));
921 goto out_free_context;
923 libusb_set_debug((*ctx)->usb_context, LIBUSB_LOG_LEVEL_INFO);
925 ret = scan_devices(*ctx, SCAN_OP_BUILD_DEVLIST , 0, NULL);
927 error(*ctx, "scan_devices() failed\n");
928 am7xxx_shutdown(*ctx);
932 /* Set a quieter log level as default for normal operation */
933 (*ctx)->log_level = AM7XXX_LOG_ERROR;
943 AM7XXX_PUBLIC void am7xxx_shutdown(am7xxx_context *ctx)
945 am7xxx_device *current;
948 fatal("context must not be NULL!\n");
952 current = ctx->devices_list;
954 am7xxx_device *next = current->next;
955 am7xxx_close_device(current);
956 free(current->device_info);
961 libusb_exit(ctx->usb_context);
966 AM7XXX_PUBLIC void am7xxx_set_log_level(am7xxx_context *ctx, am7xxx_log_level log_level)
968 ctx->log_level = log_level;
971 AM7XXX_PUBLIC int am7xxx_open_device(am7xxx_context *ctx, am7xxx_device **dev,
972 unsigned int device_index)
977 fatal("context must not be NULL!\n");
981 ret = scan_devices(ctx, SCAN_OP_OPEN_DEVICE, device_index, dev);
985 } else if (ret > 0) {
986 warning(ctx, "device %d already open\n", device_index);
992 /* Philips/Sagemcom PicoPix projectors require that the DEVINFO packet
993 * is the first one to be sent to the device in order for it to
994 * successfully return the correct device information.
996 * So, if there is not a cached version of it (from a previous open),
997 * we ask for device info at open time,
999 if ((*dev)->device_info == NULL) {
1000 ret = am7xxx_get_device_info(*dev, NULL);
1002 error(ctx, "cannot get device info\n");
1009 AM7XXX_PUBLIC int am7xxx_close_device(am7xxx_device *dev)
1012 fatal("dev must not be NULL!\n");
1015 if (dev->usb_device) {
1016 wait_for_trasfer_completed(dev);
1017 libusb_release_interface(dev->usb_device, dev->desc->interface_number);
1018 libusb_close(dev->usb_device);
1019 dev->usb_device = NULL;
1024 AM7XXX_PUBLIC int am7xxx_get_device_info(am7xxx_device *dev,
1025 am7xxx_device_info *device_info)
1028 struct am7xxx_header h = {
1029 .packet_type = AM7XXX_PACKET_TYPE_DEVINFO,
1030 .direction = AM7XXX_DIRECTION_OUT,
1031 .header_data_len = 0x00,
1044 if (dev->device_info) {
1045 memcpy(device_info, dev->device_info, sizeof(*device_info));
1049 ret = send_header(dev, &h);
1053 ret = read_header(dev, &h);
1057 if (h.packet_type != AM7XXX_PACKET_TYPE_DEVINFO) {
1058 error(dev->ctx, "expected packet type: %d, got %d instead!\n",
1059 AM7XXX_PACKET_TYPE_DEVINFO, h.packet_type);
1064 dev->device_info = malloc(sizeof(*dev->device_info));
1065 if (dev->device_info == NULL) {
1066 error(dev->ctx, "cannot allocate a device info (%s)\n",
1070 memset(dev->device_info, 0, sizeof(*dev->device_info));
1072 dev->device_info->native_width = h.header_data.devinfo.native_width;
1073 dev->device_info->native_height = h.header_data.devinfo.native_height;
1075 /* No reason to expose these in the public API until we know what they mean */
1076 dev->device_info->unknown0 = h.header_data.devinfo.unknown0;
1077 dev->device_info->unknown1 = h.header_data.devinfo.unknown1;
1083 AM7XXX_PUBLIC int am7xxx_calc_scaled_image_dimensions(am7xxx_device *dev,
1084 unsigned int upscale,
1085 unsigned int original_width,
1086 unsigned int original_height,
1087 unsigned int *scaled_width,
1088 unsigned int *scaled_height)
1091 am7xxx_device_info device_info;
1096 ret = am7xxx_get_device_info(dev, &device_info);
1098 error(dev->ctx, "cannot get device info\n");
1103 * Check if we need to rescale; if the input image fits the native
1104 * dimensions there is no need to, unless we want to upscale.
1107 original_width <= device_info.native_width &&
1108 original_height <= device_info.native_height ) {
1109 debug(dev->ctx, "CASE 0, no rescaling, the original image fits already\n");
1110 *scaled_width = original_width;
1111 *scaled_height = original_height;
1115 /* Input dimensions relative to the device native dimensions */
1116 width_ratio = (float)original_width / device_info.native_width;
1117 height_ratio = (float)original_height / device_info.native_height;
1119 if (width_ratio > height_ratio) {
1121 * The input is proportionally "wider" than the device viewport
1122 * so its height needs to be adjusted
1124 debug(dev->ctx, "CASE 1, original image wider, adjust the scaled height\n");
1125 *scaled_width = device_info.native_width;
1126 *scaled_height = (unsigned int)lroundf(original_height / width_ratio);
1127 } else if (width_ratio < height_ratio) {
1129 * The input is proportionally "taller" than the device viewport
1130 * so its width needs to be adjusted
1132 debug(dev->ctx, "CASE 2 original image taller, adjust the scaled width\n");
1133 *scaled_width = (unsigned int)lroundf(original_width / height_ratio);
1134 *scaled_height = device_info.native_height;
1136 debug(dev->ctx, "CASE 3, just rescale, same aspect ratio already\n");
1137 *scaled_width = device_info.native_width;
1138 *scaled_height = device_info.native_height;
1140 debug(dev->ctx, "scaled dimensions: %dx%d\n", *scaled_width, *scaled_height);
1145 AM7XXX_PUBLIC int am7xxx_send_image(am7xxx_device *dev,
1146 am7xxx_image_format format,
1148 unsigned int height,
1150 unsigned int image_size)
1153 struct am7xxx_header h = {
1154 .packet_type = AM7XXX_PACKET_TYPE_IMAGE,
1155 .direction = AM7XXX_DIRECTION_OUT,
1156 .header_data_len = sizeof(struct am7xxx_image_header),
1164 .image_size = image_size,
1169 ret = send_header(dev, &h);
1173 if (image == NULL || image_size == 0) {
1174 warning(dev->ctx, "Not sending any data, check the 'image' or 'image_size' parameters\n");
1178 return send_data(dev, image, image_size);
1181 AM7XXX_PUBLIC int am7xxx_send_image_async(am7xxx_device *dev,
1182 am7xxx_image_format format,
1184 unsigned int height,
1186 unsigned int image_size)
1189 struct am7xxx_header h = {
1190 .packet_type = AM7XXX_PACKET_TYPE_IMAGE,
1191 .direction = AM7XXX_DIRECTION_OUT,
1192 .header_data_len = sizeof(struct am7xxx_image_header),
1200 .image_size = image_size,
1205 ret = send_header(dev, &h);
1209 if (image == NULL || image_size == 0) {
1210 warning(dev->ctx, "Not sending any data, check the 'image' or 'image_size' parameters\n");
1214 return send_data_async(dev, image, image_size);
1217 AM7XXX_PUBLIC int am7xxx_set_power_mode(am7xxx_device *dev, am7xxx_power_mode power)
1219 if (dev->desc->ops.set_power_mode == NULL) {
1221 "setting power mode is unsupported on this device\n");
1225 return dev->desc->ops.set_power_mode(dev, power);
1228 AM7XXX_PUBLIC int am7xxx_set_zoom_mode(am7xxx_device *dev, am7xxx_zoom_mode zoom)
1230 if (dev->desc->ops.set_zoom_mode == NULL) {
1232 "setting zoom mode is unsupported on this device\n");
1236 return dev->desc->ops.set_zoom_mode(dev, zoom);