1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
|
/*
* Copyright (C) Texas Instruments - http://www.ti.com/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file V4LCameraAdapter.cpp
*
* This file maps the Camera Hardware Interface to V4L2.
*
*/
#include "V4LCameraAdapter.h"
#include "CameraHal.h"
#include "TICameraParameters.h"
#include "DebugUtils.h"
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <linux/videodev.h>
#include <ui/GraphicBuffer.h>
#include <ui/GraphicBufferMapper.h>
#include <cutils/properties.h>
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
static int mDebugFps = 0;
#define Q16_OFFSET 16
#define HERE(Msg) {CAMHAL_LOGEB("--=== %s===--\n", Msg);}
namespace android {
//frames skipped before recalculating the framerate
#define FPS_PERIOD 30
//define this macro to save first few raw frames when starting the preview.
//#define SAVE_RAW_FRAMES 1
//#define DUMP_CAPTURE_FRAME 1
//Proto Types
static void convertYUV422i_yuyvTouyvy(uint8_t *src, uint8_t *dest, size_t size );
static void convertYUV422ToNV12(unsigned char *src, unsigned char *dest, int width, int height );
Mutex gV4LAdapterLock;
char device[15];
/*--------------------Camera Adapter Class STARTS here-----------------------------*/
/*--------------------V4L wrapper functions -------------------------------*/
status_t V4LCameraAdapter::v4lIoctl (int fd, int req, void* argp) {
status_t ret = NO_ERROR;
errno = 0;
do {
ret = ioctl (fd, req, argp);
}while (-1 == ret && EINTR == errno);
return ret;
}
status_t V4LCameraAdapter::v4lInitMmap(int& count) {
status_t ret = NO_ERROR;
//First allocate adapter internal buffers at V4L level for USB Cam
//These are the buffers from which we will copy the data into overlay buffers
/* Check if camera can handle NB_BUFFER buffers */
mVideoInfo->rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->rb.memory = V4L2_MEMORY_MMAP;
mVideoInfo->rb.count = count;
ret = v4lIoctl(mCameraHandle, VIDIOC_REQBUFS, &mVideoInfo->rb);
if (ret < 0) {
CAMHAL_LOGEB("VIDIOC_REQBUFS failed: %s", strerror(errno));
return ret;
}
count = mVideoInfo->rb.count;
for (int i = 0; i < count; i++) {
memset (&mVideoInfo->buf, 0, sizeof (struct v4l2_buffer));
mVideoInfo->buf.index = i;
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
ret = v4lIoctl (mCameraHandle, VIDIOC_QUERYBUF, &mVideoInfo->buf);
if (ret < 0) {
CAMHAL_LOGEB("Unable to query buffer (%s)", strerror(errno));
return ret;
}
mVideoInfo->mem[i] = mmap (NULL,
mVideoInfo->buf.length,
PROT_READ | PROT_WRITE,
MAP_SHARED,
mCameraHandle,
mVideoInfo->buf.m.offset);
CAMHAL_LOGVB(" mVideoInfo->mem[%d]=%p ; mVideoInfo->buf.length = %d", i, mVideoInfo->mem[i], mVideoInfo->buf.length);
if (mVideoInfo->mem[i] == MAP_FAILED) {
CAMHAL_LOGEB("Unable to map buffer [%d]. (%s)", i, strerror(errno));
return -1;
}
}
return ret;
}
status_t V4LCameraAdapter::v4lInitUsrPtr(int& count) {
status_t ret = NO_ERROR;
mVideoInfo->rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->rb.memory = V4L2_MEMORY_USERPTR;
mVideoInfo->rb.count = count;
ret = v4lIoctl(mCameraHandle, VIDIOC_REQBUFS, &mVideoInfo->rb);
if (ret < 0) {
CAMHAL_LOGEB("VIDIOC_REQBUFS failed for USERPTR: %s", strerror(errno));
return ret;
}
count = mVideoInfo->rb.count;
return ret;
}
status_t V4LCameraAdapter::v4lStartStreaming () {
status_t ret = NO_ERROR;
enum v4l2_buf_type bufType;
if (!mVideoInfo->isStreaming) {
bufType = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4lIoctl (mCameraHandle, VIDIOC_STREAMON, &bufType);
if (ret < 0) {
CAMHAL_LOGEB("StartStreaming: Unable to start capture: %s", strerror(errno));
return ret;
}
mVideoInfo->isStreaming = true;
}
return ret;
}
status_t V4LCameraAdapter::v4lStopStreaming (int nBufferCount) {
status_t ret = NO_ERROR;
enum v4l2_buf_type bufType;
if (mVideoInfo->isStreaming) {
bufType = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4lIoctl (mCameraHandle, VIDIOC_STREAMOFF, &bufType);
if (ret < 0) {
CAMHAL_LOGEB("StopStreaming: Unable to stop capture: %s", strerror(errno));
goto EXIT;
}
mVideoInfo->isStreaming = false;
/* Unmap buffers */
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
for (int i = 0; i < nBufferCount; i++) {
if (munmap(mVideoInfo->mem[i], mVideoInfo->buf.length) < 0) {
CAMHAL_LOGEA("munmap() failed");
}
}
//free the memory allocated during REQBUFS, by setting the count=0
mVideoInfo->rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->rb.memory = V4L2_MEMORY_MMAP;
mVideoInfo->rb.count = 0;
ret = v4lIoctl(mCameraHandle, VIDIOC_REQBUFS, &mVideoInfo->rb);
if (ret < 0) {
CAMHAL_LOGEB("VIDIOC_REQBUFS failed: %s", strerror(errno));
goto EXIT;
}
}
EXIT:
return ret;
}
status_t V4LCameraAdapter::v4lSetFormat (int width, int height, uint32_t pix_format) {
status_t ret = NO_ERROR;
mVideoInfo->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4lIoctl(mCameraHandle, VIDIOC_G_FMT, &mVideoInfo->format);
if (ret < 0) {
CAMHAL_LOGEB("VIDIOC_G_FMT Failed: %s", strerror(errno));
}
mVideoInfo->width = width;
mVideoInfo->height = height;
mVideoInfo->framesizeIn = (width * height << 1);
mVideoInfo->formatIn = DEFAULT_PIXEL_FORMAT;
mVideoInfo->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->format.fmt.pix.width = width;
mVideoInfo->format.fmt.pix.height = height;
mVideoInfo->format.fmt.pix.pixelformat = pix_format;
ret = v4lIoctl(mCameraHandle, VIDIOC_S_FMT, &mVideoInfo->format);
if (ret < 0) {
CAMHAL_LOGEB("VIDIOC_S_FMT Failed: %s", strerror(errno));
return ret;
}
v4lIoctl(mCameraHandle, VIDIOC_G_FMT, &mVideoInfo->format);
CAMHAL_LOGDB("VIDIOC_G_FMT : WxH = %dx%d", mVideoInfo->format.fmt.pix.width, mVideoInfo->format.fmt.pix.height);
return ret;
}
status_t V4LCameraAdapter::restartPreview ()
{
status_t ret = NO_ERROR;
int width = 0;
int height = 0;
struct v4l2_streamparm streamParams;
//configure for preview size and pixel format.
mParams.getPreviewSize(&width, &height);
ret = v4lSetFormat (width, height, DEFAULT_PIXEL_FORMAT);
if (ret < 0) {
CAMHAL_LOGEB("v4lSetFormat Failed: %s", strerror(errno));
goto EXIT;
}
v4lInitMmap(mPreviewBufferCount);
//set frame rate
streamParams.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
streamParams.parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
streamParams.parm.capture.capturemode = V4L2_MODE_HIGHQUALITY;
streamParams.parm.capture.timeperframe.denominator = FPS_PERIOD;
streamParams.parm.capture.timeperframe.numerator= 1;
ret = v4lIoctl(mCameraHandle, VIDIOC_S_PARM, &streamParams);
if (ret < 0) {
CAMHAL_LOGEB("VIDIOC_S_PARM Failed: %s", strerror(errno));
goto EXIT;
}
for (int i = 0; i < mPreviewBufferCountQueueable; i++) {
mVideoInfo->buf.index = i;
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
ret = v4lIoctl(mCameraHandle, VIDIOC_QBUF, &mVideoInfo->buf);
if (ret < 0) {
CAMHAL_LOGEA("VIDIOC_QBUF Failed");
goto EXIT;
}
nQueued++;
}
ret = v4lStartStreaming();
CAMHAL_LOGDA("Ready for preview....");
EXIT:
return ret;
}
/*--------------------Camera Adapter Functions-----------------------------*/
status_t V4LCameraAdapter::initialize(CameraProperties::Properties* caps)
{
char value[PROPERTY_VALUE_MAX];
LOG_FUNCTION_NAME;
property_get("debug.camera.showfps", value, "0");
mDebugFps = atoi(value);
int ret = NO_ERROR;
// Allocate memory for video info structure
mVideoInfo = (struct VideoInfo *) calloc (1, sizeof (struct VideoInfo));
if(!mVideoInfo) {
ret = NO_MEMORY;
goto EXIT;
}
if ((mCameraHandle = open(device, O_RDWR) ) == -1) {
CAMHAL_LOGEB("Error while opening handle to V4L2 Camera: %s", strerror(errno));
ret = BAD_VALUE;
goto EXIT;
}
ret = v4lIoctl (mCameraHandle, VIDIOC_QUERYCAP, &mVideoInfo->cap);
if (ret < 0) {
CAMHAL_LOGEA("Error when querying the capabilities of the V4L Camera");
ret = BAD_VALUE;
goto EXIT;
}
if ((mVideoInfo->cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
CAMHAL_LOGEA("Error while adapter initialization: video capture not supported.");
ret = BAD_VALUE;
goto EXIT;
}
if (!(mVideoInfo->cap.capabilities & V4L2_CAP_STREAMING)) {
CAMHAL_LOGEA("Error while adapter initialization: Capture device does not support streaming i/o");
ret = BAD_VALUE;
goto EXIT;
}
// Initialize flags
mPreviewing = false;
mVideoInfo->isStreaming = false;
mRecording = false;
mCapturing = false;
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::fillThisBuffer(CameraBuffer *frameBuf, CameraFrame::FrameType frameType)
{
status_t ret = NO_ERROR;
int idx = 0;
LOG_FUNCTION_NAME;
if ( frameType == CameraFrame::IMAGE_FRAME) { //(1 > mCapturedFrames)
// Signal end of image capture
if ( NULL != mEndImageCaptureCallback) {
CAMHAL_LOGDB("===========Signal End Image Capture==========");
mEndImageCaptureCallback(mEndCaptureData);
}
goto EXIT;
}
if ( !mVideoInfo->isStreaming ) {
goto EXIT;
}
idx = mPreviewBufs.valueFor(frameBuf);
if(idx < 0) {
CAMHAL_LOGEB("Wrong index = %d",idx);
goto EXIT;
}
mVideoInfo->buf.index = idx;
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
ret = v4lIoctl(mCameraHandle, VIDIOC_QBUF, &mVideoInfo->buf);
if (ret < 0) {
CAMHAL_LOGEA("VIDIOC_QBUF Failed");
goto EXIT;
}
nQueued++;
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::setParameters(const CameraParameters ¶ms)
{
status_t ret = NO_ERROR;
int width, height;
struct v4l2_streamparm streamParams;
LOG_FUNCTION_NAME;
if(!mPreviewing && !mCapturing) {
params.getPreviewSize(&width, &height);
CAMHAL_LOGDB("Width * Height %d x %d format 0x%x", width, height, DEFAULT_PIXEL_FORMAT);
ret = v4lSetFormat( width, height, DEFAULT_PIXEL_FORMAT);
if (ret < 0) {
CAMHAL_LOGEB(" VIDIOC_S_FMT Failed: %s", strerror(errno));
goto EXIT;
}
//set frame rate
// Now its fixed to 30 FPS
streamParams.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
streamParams.parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
streamParams.parm.capture.capturemode = V4L2_MODE_HIGHQUALITY;
streamParams.parm.capture.timeperframe.denominator = FPS_PERIOD;
streamParams.parm.capture.timeperframe.numerator= 1;
ret = v4lIoctl(mCameraHandle, VIDIOC_S_PARM, &streamParams);
if (ret < 0) {
CAMHAL_LOGEB(" VIDIOC_S_PARM Failed: %s", strerror(errno));
goto EXIT;
}
int actualFps = streamParams.parm.capture.timeperframe.denominator / streamParams.parm.capture.timeperframe.numerator;
CAMHAL_LOGDB("Actual FPS set is : %d.", actualFps);
}
// Udpate the current parameter set
mParams = params;
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
void V4LCameraAdapter::getParameters(CameraParameters& params)
{
LOG_FUNCTION_NAME;
// Return the current parameter set
params = mParams;
LOG_FUNCTION_NAME_EXIT;
}
///API to give the buffers to Adapter
status_t V4LCameraAdapter::useBuffers(CameraMode mode, CameraBuffer *bufArr, int num, size_t length, unsigned int queueable)
{
status_t ret = NO_ERROR;
LOG_FUNCTION_NAME;
Mutex::Autolock lock(mLock);
switch(mode)
{
case CAMERA_PREVIEW:
mPreviewBufferCountQueueable = queueable;
ret = UseBuffersPreview(bufArr, num);
break;
case CAMERA_IMAGE_CAPTURE:
mCaptureBufferCountQueueable = queueable;
ret = UseBuffersCapture(bufArr, num);
break;
case CAMERA_VIDEO:
//@warn Video capture is not fully supported yet
mPreviewBufferCountQueueable = queueable;
ret = UseBuffersPreview(bufArr, num);
break;
case CAMERA_MEASUREMENT:
break;
default:
break;
}
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::UseBuffersCapture(CameraBuffer *bufArr, int num) {
int ret = NO_ERROR;
LOG_FUNCTION_NAME;
if(NULL == bufArr) {
ret = BAD_VALUE;
goto EXIT;
}
for (int i = 0; i < num; i++) {
//Associate each Camera internal buffer with the one from Overlay
mCaptureBufs.add(&bufArr[i], i);
CAMHAL_LOGDB("capture- buff [%d] = 0x%x ",i, mCaptureBufs.keyAt(i));
}
// Update the preview buffer count
mCaptureBufferCount = num;
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::UseBuffersPreview(CameraBuffer *bufArr, int num)
{
int ret = NO_ERROR;
LOG_FUNCTION_NAME;
if(NULL == bufArr) {
ret = BAD_VALUE;
goto EXIT;
}
ret = v4lInitMmap(num);
if (ret == NO_ERROR) {
for (int i = 0; i < num; i++) {
//Associate each Camera internal buffer with the one from Overlay
mPreviewBufs.add(&bufArr[i], i);
CAMHAL_LOGDB("Preview- buff [%d] = 0x%x ",i, mPreviewBufs.keyAt(i));
}
// Update the preview buffer count
mPreviewBufferCount = num;
}
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::takePicture() {
status_t ret = NO_ERROR;
int width = 0;
int height = 0;
size_t yuv422i_buff_size = 0;
int index = 0;
char *fp = NULL;
CameraBuffer *buffer = NULL;
CameraFrame frame;
LOG_FUNCTION_NAME;
Mutex::Autolock lock(mCaptureBufsLock);
if(mCapturing) {
CAMHAL_LOGEA("Already Capture in Progress...");
ret = BAD_VALUE;
goto EXIT;
}
mCapturing = true;
mPreviewing = false;
// Stop preview streaming
ret = v4lStopStreaming(mPreviewBufferCount);
if (ret < 0 ) {
CAMHAL_LOGEB("v4lStopStreaming Failed: %s", strerror(errno));
goto EXIT;
}
//configure for capture image size and pixel format.
mParams.getPictureSize(&width, &height);
CAMHAL_LOGDB("Image Capture Size WxH = %dx%d",width,height);
yuv422i_buff_size = width * height * 2;
ret = v4lSetFormat (width, height, DEFAULT_PIXEL_FORMAT);
if (ret < 0) {
CAMHAL_LOGEB("v4lSetFormat Failed: %s", strerror(errno));
goto EXIT;
}
ret = v4lInitMmap(mCaptureBufferCount);
if (ret < 0) {
CAMHAL_LOGEB("v4lInitMmap Failed: %s", strerror(errno));
goto EXIT;
}
for (int i = 0; i < mCaptureBufferCountQueueable; i++) {
mVideoInfo->buf.index = i;
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
ret = v4lIoctl(mCameraHandle, VIDIOC_QBUF, &mVideoInfo->buf);
if (ret < 0) {
CAMHAL_LOGEA("VIDIOC_QBUF Failed");
ret = BAD_VALUE;
goto EXIT;
}
nQueued++;
}
ret = v4lStartStreaming();
if (ret < 0) {
CAMHAL_LOGEB("v4lStartStreaming Failed: %s", strerror(errno));
goto EXIT;
}
CAMHAL_LOGDA("Streaming started for Image Capture");
//get the frame and send to encode as JPG
fp = this->GetFrame(index);
if(!fp) {
CAMHAL_LOGEA("!!! Captured frame is NULL !!!!");
ret = BAD_VALUE;
goto EXIT;
}
CAMHAL_LOGDA("::Capture Frame received from V4L::");
buffer = mCaptureBufs.keyAt(index);
CAMHAL_LOGVB("## captureBuf[%d] = 0x%x, yuv422i_buff_size=%d", index, buffer->opaque, yuv422i_buff_size);
//copy the yuv422i data to the image buffer.
memcpy(buffer->opaque, fp, yuv422i_buff_size);
#ifdef DUMP_CAPTURE_FRAME
//dump the YUV422 buffer in to a file
//a folder should have been created at /data/misc/camera/raw/
{
int fd =-1;
fd = open("/data/misc/camera/raw/captured_yuv422i_dump.yuv", O_CREAT | O_WRONLY | O_SYNC | O_TRUNC, 0777);
if(fd < 0) {
CAMHAL_LOGEB("Unable to open file: %s", strerror(fd));
}
else {
write(fd, fp, yuv422i_buff_size );
close(fd);
CAMHAL_LOGDB("::Captured Frame dumped at /data/misc/camera/raw/captured_yuv422i_dump.yuv::");
}
}
#endif
CAMHAL_LOGDA("::sending capture frame to encoder::");
frame.mFrameType = CameraFrame::IMAGE_FRAME;
frame.mBuffer = buffer;
frame.mLength = yuv422i_buff_size;
frame.mWidth = width;
frame.mHeight = height;
frame.mAlignment = width*2;
frame.mOffset = 0;
frame.mTimestamp = systemTime(SYSTEM_TIME_MONOTONIC);
frame.mFrameMask = (unsigned int)CameraFrame::IMAGE_FRAME;
frame.mQuirks |= CameraFrame::ENCODE_RAW_YUV422I_TO_JPEG;
frame.mQuirks |= CameraFrame::FORMAT_YUV422I_YUYV;
ret = setInitFrameRefCount(frame.mBuffer, frame.mFrameMask);
if (ret != NO_ERROR) {
CAMHAL_LOGDB("Error in setInitFrameRefCount %d", ret);
} else {
ret = sendFrameToSubscribers(&frame);
}
// Stop streaming after image capture
ret = v4lStopStreaming(mCaptureBufferCount);
if (ret < 0 ) {
CAMHAL_LOGEB("v4lStopStreaming Failed: %s", strerror(errno));
goto EXIT;
}
ret = restartPreview();
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::stopImageCapture()
{
status_t ret = NO_ERROR;
LOG_FUNCTION_NAME;
//Release image buffers
if ( NULL != mReleaseImageBuffersCallback ) {
mReleaseImageBuffersCallback(mReleaseData);
}
mCaptureBufs.clear();
mCapturing = false;
mPreviewing = true;
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::autoFocus()
{
status_t ret = NO_ERROR;
LOG_FUNCTION_NAME;
//autoFocus is not implemented. Just return.
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::startPreview()
{
status_t ret = NO_ERROR;
LOG_FUNCTION_NAME;
Mutex::Autolock lock(mPreviewBufsLock);
if(mPreviewing) {
ret = BAD_VALUE;
goto EXIT;
}
for (int i = 0; i < mPreviewBufferCountQueueable; i++) {
mVideoInfo->buf.index = i;
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
ret = v4lIoctl(mCameraHandle, VIDIOC_QBUF, &mVideoInfo->buf);
if (ret < 0) {
CAMHAL_LOGEA("VIDIOC_QBUF Failed");
goto EXIT;
}
nQueued++;
}
ret = v4lStartStreaming();
// Create and start preview thread for receiving buffers from V4L Camera
if(!mCapturing) {
mPreviewThread = new PreviewThread(this);
CAMHAL_LOGDA("Created preview thread");
}
//Update the flag to indicate we are previewing
mPreviewing = true;
mCapturing = false;
EXIT:
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::stopPreview()
{
enum v4l2_buf_type bufType;
int ret = NO_ERROR;
LOG_FUNCTION_NAME;
Mutex::Autolock lock(mStopPreviewLock);
if(!mPreviewing) {
return NO_INIT;
}
mPreviewing = false;
ret = v4lStopStreaming(mPreviewBufferCount);
if (ret < 0) {
CAMHAL_LOGEB("StopStreaming: FAILED: %s", strerror(errno));
}
nQueued = 0;
nDequeued = 0;
mFramesWithEncoder = 0;
mPreviewBufs.clear();
mPreviewThread->requestExitAndWait();
mPreviewThread.clear();
LOG_FUNCTION_NAME_EXIT;
return ret;
}
char * V4LCameraAdapter::GetFrame(int &index)
{
int ret = NO_ERROR;
LOG_FUNCTION_NAME;
mVideoInfo->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
mVideoInfo->buf.memory = V4L2_MEMORY_MMAP;
/* DQ */
ret = v4lIoctl(mCameraHandle, VIDIOC_DQBUF, &mVideoInfo->buf);
if (ret < 0) {
CAMHAL_LOGEA("GetFrame: VIDIOC_DQBUF Failed");
return NULL;
}
nDequeued++;
index = mVideoInfo->buf.index;
LOG_FUNCTION_NAME_EXIT;
return (char *)mVideoInfo->mem[mVideoInfo->buf.index];
}
//API to get the frame size required to be allocated. This size is used to override the size passed
//by camera service when VSTAB/VNF is turned ON for example
status_t V4LCameraAdapter::getFrameSize(size_t &width, size_t &height)
{
status_t ret = NO_ERROR;
LOG_FUNCTION_NAME;
// Just return the current preview size, nothing more to do here.
mParams.getPreviewSize(( int * ) &width,
( int * ) &height);
LOG_FUNCTION_NAME_EXIT;
return ret;
}
status_t V4LCameraAdapter::getFrameDataSize(size_t &dataFrameSize, size_t bufferCount)
{
// We don't support meta data, so simply return
return NO_ERROR;
}
status_t V4LCameraAdapter::getPictureBufferSize(size_t &length, size_t bufferCount)
{
int width = 0;
int height = 0;
int bytesPerPixel = 2; // for YUV422i; default pixel format
LOG_FUNCTION_NAME;
mParams.getPictureSize( &width, &height );
length = width * height * bytesPerPixel;
CAMHAL_LOGDB("Picture size: W x H = %d x %d (size=%d bytes)",width, height, length);
LOG_FUNCTION_NAME_EXIT;
return NO_ERROR;
}
static void debugShowFPS()
{
static int mFrameCount = 0;
static int mLastFrameCount = 0;
static nsecs_t mLastFpsTime = 0;
static float mFps = 0;
if(mDebugFps) {
mFrameCount++;
if (!(mFrameCount & 0x1F)) {
nsecs_t now = systemTime();
nsecs_t diff = now - mLastFpsTime;
mFps = ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
mLastFpsTime = now;
mLastFrameCount = mFrameCount;
LOGD("Camera %d Frames, %f FPS", mFrameCount, mFps);
}
}
}
status_t V4LCameraAdapter::recalculateFPS()
{
float currentFPS;
mFrameCount++;
if ( ( mFrameCount % FPS_PERIOD ) == 0 )
{
nsecs_t now = systemTime();
nsecs_t diff = now - mLastFPSTime;
currentFPS = ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
mLastFPSTime = now;
mLastFrameCount = mFrameCount;
if ( 1 == mIter )
{
mFPS = currentFPS;
}
else
{
//cumulative moving average
mFPS = mLastFPS + (currentFPS - mLastFPS)/mIter;
}
mLastFPS = mFPS;
mIter++;
}
return NO_ERROR;
}
void V4LCameraAdapter::onOrientationEvent(uint32_t orientation, uint32_t tilt)
{
LOG_FUNCTION_NAME;
LOG_FUNCTION_NAME_EXIT;
}
V4LCameraAdapter::V4LCameraAdapter(size_t sensor_index)
{
LOG_FUNCTION_NAME;
// Nothing useful to do in the constructor
mFramesWithEncoder = 0;
LOG_FUNCTION_NAME_EXIT;
}
V4LCameraAdapter::~V4LCameraAdapter()
{
LOG_FUNCTION_NAME;
// Close the camera handle and free the video info structure
close(mCameraHandle);
if (mVideoInfo)
{
free(mVideoInfo);
mVideoInfo = NULL;
}
LOG_FUNCTION_NAME_EXIT;
}
static void convertYUV422i_yuyvTouyvy(uint8_t *src, uint8_t *dest, size_t size ) {
//convert YUV422I yuyv to uyvy format.
uint32_t *bf = (uint32_t*)src;
uint32_t *dst = (uint32_t*)dest;
LOG_FUNCTION_NAME;
if (!src || !dest) {
return;
}
for(size_t i = 0; i < size; i = i+4)
{
dst[0] = ((bf[0] & 0x00FF00FF) << 8) | ((bf[0] & 0xFF00FF00) >> 8);
bf++;
dst++;
}
LOG_FUNCTION_NAME_EXIT;
}
static void convertYUV422ToNV12(unsigned char *src, unsigned char *dest, int width, int height ) {
//convert YUV422I to YUV420 NV12 format.
size_t nv12_buf_size = (width * height)*3/2;
unsigned char *bf = src;
unsigned char *dst_y = dest;
unsigned char *dst_uv = dest + (width * height);
LOG_FUNCTION_NAME;
if (width % 16 ) {
for(int i = 0; i < height; i++) {
for(int j = 0; j < width; j++) {
*dst_y = *bf;
dst_y++;
bf = bf + 2;
}
}
bf = src;
bf++; //U sample
for(int i = 0; i < height/2; i++) {
for(int j=0; j<width; j++) {
*dst_uv = *bf;
dst_uv++;
bf = bf + 2;
}
bf = bf + width*2;
}
} else {
//neon conversion
for(int i = 0; i < height; i++) {
int n = width;
int skip = i & 0x1; // skip uv elements for the odd rows
asm volatile (
" pld [%[src], %[src_stride], lsl #2] \n\t"
" cmp %[n], #16 \n\t"
" blt 5f \n\t"
"0: @ 16 pixel copy \n\t"
" vld2.8 {q0, q1} , [%[src]]! @ q0 = yyyy.. q1 = uvuv.. \n\t"
" @ now q0 = y q1 = uv \n\t"
" vst1.32 {d0,d1}, [%[dst_y]]! \n\t"
" cmp %[skip], #0 \n\t"
" bne 1f \n\t"
" vst1.32 {d2,d3},[%[dst_uv]]! \n\t"
"1: @ skip odd rows for UV \n\t"
" sub %[n], %[n], #16 \n\t"
" cmp %[n], #16 \n\t"
" bge 0b \n\t"
"5: @ end \n\t"
#ifdef NEEDS_ARM_ERRATA_754319_754320
" vmov s0,s0 @ add noop for errata item \n\t"
#endif
: [dst_y] "+r" (dst_y), [dst_uv] "+r" (dst_uv), [src] "+r" (src), [n] "+r" (n)
: [src_stride] "r" (width), [skip] "r" (skip)
: "cc", "memory", "q0", "q1", "q2", "d0", "d1", "d2", "d3"
);
}
}
LOG_FUNCTION_NAME_EXIT;
}
#ifdef SAVE_RAW_FRAMES
void saveFile(unsigned char* buff, int buff_size) {
static int counter = 1;
int fd = -1;
char fn[256];
LOG_FUNCTION_NAME;
if (counter > 3) {
return;
}
//dump nv12 buffer
counter++;
sprintf(fn, "/data/misc/camera/raw/nv12_dump_%03d.yuv", counter);
CAMHAL_LOGEB("Dumping nv12 frame to a file : %s.", fn);
fd = open(fn, O_CREAT | O_WRONLY | O_SYNC | O_TRUNC, 0777);
if(fd < 0) {
LOGE("Unable to open file %s: %s", fn, strerror(fd));
return;
}
write(fd, buff, buff_size );
close(fd);
LOG_FUNCTION_NAME_EXIT;
}
#endif
/* Preview Thread */
// ---------------------------------------------------------------------------
int V4LCameraAdapter::previewThread()
{
status_t ret = NO_ERROR;
int width, height;
CameraFrame frame;
unsigned char *nv12_buff = NULL;
void *y_uv[2];
int index = 0;
uint8_t* ptr = NULL;
int stride = 4096;
char *fp = NULL;
mParams.getPreviewSize(&width, &height);
nv12_buff = (unsigned char*) malloc(width*height*3/2);
if (mPreviewing) {
fp = this->GetFrame(index);
if(!fp) {
ret = BAD_VALUE;
goto EXIT;
}
CameraBuffer *buffer = mPreviewBufs.keyAt(index);
CameraFrame *lframe = (CameraFrame *)mFrameQueue.valueFor(buffer);
if (!lframe) {
ret = BAD_VALUE;
goto EXIT;
}
debugShowFPS();
//Convert yuv422i ti yuv420sp(NV12) & dump the frame to a file
convertYUV422ToNV12 ( (unsigned char*)fp, nv12_buff, width, height);
#ifdef SAVE_RAW_FRAMES
saveFile( nv12_buff, ((width*height)*3/2) );
#endif
if ( mFrameSubscribers.size() == 0 ) {
ret = BAD_VALUE;
goto EXIT;
}
y_uv[0] = (void*) lframe->mYuv[0];
//y_uv[1] = (void*) lframe->mYuv[1];
y_uv[1] = (void*) (lframe->mYuv[0] + height*stride);
CAMHAL_LOGVB("##...index= %d.;camera buffer= 0x%x; y= 0x%x; UV= 0x%x.",index, buffer, y_uv[0], y_uv[1] );
unsigned char *bufferDst = ( unsigned char * ) y_uv[0];
unsigned char *bufferSrc = nv12_buff;
int rowBytes = width;
//Copy the Y plane to Gralloc buffer
for(int i = 0; i < height; i++) {
memcpy(bufferDst, bufferSrc, rowBytes);
bufferDst += stride;
bufferSrc += rowBytes;
}
//Copy UV plane, now Y & UV are contiguous.
//bufferDst = ( unsigned char * ) y_uv[1];
for(int j = 0; j < height/2; j++) {
memcpy(bufferDst, bufferSrc, rowBytes);
bufferDst += stride;
bufferSrc += rowBytes;
}
frame.mFrameType = CameraFrame::PREVIEW_FRAME_SYNC;
frame.mBuffer = buffer;
frame.mLength = width*height*3/2;
frame.mAlignment = stride;
frame.mOffset = 0;
frame.mTimestamp = systemTime(SYSTEM_TIME_MONOTONIC);
frame.mFrameMask = (unsigned int)CameraFrame::PREVIEW_FRAME_SYNC;
if (mRecording)
{
frame.mFrameMask |= (unsigned int)CameraFrame::VIDEO_FRAME_SYNC;
mFramesWithEncoder++;
}
ret = setInitFrameRefCount(frame.mBuffer, frame.mFrameMask);
if (ret != NO_ERROR) {
CAMHAL_LOGDB("Error in setInitFrameRefCount %d", ret);
} else {
ret = sendFrameToSubscribers(&frame);
}
}
EXIT:
free (nv12_buff);
return ret;
}
//scan for video devices
void detectVideoDevice(char** video_device_list, int& num_device) {
char dir_path[20];
char* filename;
char** dev_list = video_device_list;
DIR *d;
struct dirent *dir;
int index = 0;
strcpy(dir_path, DEVICE_PATH);
d = opendir(dir_path);
if(d) {
//read each entry in the /dev/ and find if there is videox entry.
while ((dir = readdir(d)) != NULL) {
filename = dir->d_name;
if (strncmp(filename, DEVICE_NAME, 5) == 0) {
strcpy(dev_list[index],DEVICE_PATH);
strncat(dev_list[index],filename,sizeof(DEVICE_NAME));
index++;
}
} //end of while()
closedir(d);
num_device = index;
for(int i=0; i<index; i++){
CAMHAL_LOGDB("Video device list::dev_list[%d]= %s",i,dev_list[i]);
}
}
}
extern "C" CameraAdapter* V4LCameraAdapter_Factory(size_t sensor_index)
{
CameraAdapter *adapter = NULL;
Mutex::Autolock lock(gV4LAdapterLock);
LOG_FUNCTION_NAME;
adapter = new V4LCameraAdapter(sensor_index);
if ( adapter ) {
CAMHAL_LOGDB("New V4L Camera adapter instance created for sensor %d",sensor_index);
} else {
CAMHAL_LOGEA("V4L Camera adapter create failed for sensor index = %d!",sensor_index);
}
LOG_FUNCTION_NAME_EXIT;
return adapter;
}
extern "C" status_t V4LCameraAdapter_Capabilities(
CameraProperties::Properties * const properties_array,
const int starting_camera, const int max_camera, int & supportedCameras)
{
status_t ret = NO_ERROR;
struct v4l2_capability cap;
int tempHandle = NULL;
int num_cameras_supported = 0;
char device_list[5][15];
char* video_device_list[5];
int num_v4l_devices = 0;
int sensorId = 0;
CameraProperties::Properties* properties = NULL;
LOG_FUNCTION_NAME;
supportedCameras = 0;
memset((void*)&cap, 0, sizeof(v4l2_capability));
if (!properties_array) {
CAMHAL_LOGEB("invalid param: properties = 0x%p", properties_array);
LOG_FUNCTION_NAME_EXIT;
return BAD_VALUE;
}
for (int i = 0; i < 5; i++) {
video_device_list[i] = device_list[i];
}
//look for the connected video devices
detectVideoDevice(video_device_list, num_v4l_devices);
for (int i = 0; i < num_v4l_devices; i++) {
if ( (starting_camera + num_cameras_supported) < max_camera) {
sensorId = starting_camera + num_cameras_supported;
CAMHAL_LOGDB("Opening device[%d] = %s..",i, video_device_list[i]);
if ((tempHandle = open(video_device_list[i], O_RDWR)) == -1) {
CAMHAL_LOGEB("Error while opening handle to V4L2 Camera(%s): %s",video_device_list[i], strerror(errno));
continue;
}
ret = ioctl (tempHandle, VIDIOC_QUERYCAP, &cap);
if (ret < 0) {
CAMHAL_LOGEA("Error when querying the capabilities of the V4L Camera");
close(tempHandle);
continue;
}
//check for video capture devices
if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
CAMHAL_LOGEA("Error while adapter initialization: video capture not supported.");
close(tempHandle);
continue;
}
strcpy(device, video_device_list[i]);
properties = properties_array + starting_camera + num_cameras_supported;
//fetch capabilities for this camera
V4LCameraAdapter::getCaps( sensorId, properties, tempHandle );
num_cameras_supported++;
}
//For now exit this loop once a valid video capture device is found.
//TODO: find all V4L capture devices and it capabilities
break;
}//end of for() loop
supportedCameras = num_cameras_supported;
CAMHAL_LOGDB("Number of V4L cameras detected =%d", num_cameras_supported);
EXIT:
LOG_FUNCTION_NAME_EXIT;
close(tempHandle);
return NO_ERROR;
}
};
/*--------------------Camera Adapter Class ENDS here-----------------------------*/
|