WIP: Write aligned frames to block device

src/Makefile

@@ -11,7 +11,7 @@ IMAGES     = $(GUIDIR)/images/filebrowser-01.gif $(GUIDIR)/images/filebrowser-bo
              $(GUIDIR)/images/rec_folder.png $(GUIDIR)/images/up_folder.gif $(GUIDIR)/images/play_audio.png $(GUIDIR)/images/hdd.png
 
 
-SRCS = camogm.c camogm_ogm.c camogm_jpeg.c camogm_mov.c camogm_kml.c camogm_read.c index_list.c
+SRCS = camogm.c camogm_ogm.c camogm_jpeg.c camogm_mov.c camogm_kml.c camogm_read.c index_list.c camogm_align.c
 TEST_SRC = camogm_test.c
 OBJS = $(SRCS:.c=.o)
 

src/camogm.c

@@ -514,8 +514,7 @@ int sendImageFrame(camogm_state *state)
 	int port = state->port_num;
 	struct timeval start_time, end_time;
 
-	D6(fprintf(debug_file, "last_error_code = %d\n", state->last_error_code));
-	start_time = get_fpga_time(state->fd_fparmsall[port], port);
+//	start_time = get_fpga_time(state->fd_fparmsall[port], port);
 
 // This is probably needed only for Quicktime (not to exceed already allocated frame index)
 	if (!state->rawdev_op && (state->frameno >= (state->max_frames))) {
@@ -646,12 +645,14 @@ int sendImageFrame(camogm_state *state)
 /* copy from the beginning of the buffer to the end of the frame */
 		state->packetchunks[state->chunk_index  ].bytes = state->jpeg_len - (state->circ_buff_size[port] - state->cirbuf_rp[port]);
 		state->packetchunks[state->chunk_index++].chunk = (unsigned char*)&ccam_dma_buf[state->port_num][0];
+		state->writer_params.segments = 2;
 	} else { // single segment
 		D3(fprintf(debug_file, "_11_"));
 
 /* copy from the beginning of the frame to the end of the frame (no buffer rollovers) */
 		state->packetchunks[state->chunk_index  ].bytes = state->jpeg_len;
 		state->packetchunks[state->chunk_index++].chunk = (unsigned char*)&ccam_dma_buf[state->port_num][state->cirbuf_rp[port] >> 2];
+		state->writer_params.segments = 1;
 	}
 	D3(fprintf(debug_file, "\tcirbuf_rp = 0x%x\t", state->cirbuf_rp[port]));
 	D3(fprintf(debug_file, "_12_"));
@@ -687,16 +688,16 @@ int sendImageFrame(camogm_state *state)
 	}
 	D3(fprintf(debug_file,"cirbuf_rp to next frame = 0x%x\n", state->cirbuf_rp[port]));
 
-	end_time = get_fpga_time(state->fd_fparmsall[port], port);
-	unsigned int mbps; // write speed, MB/s
-	unsigned long long time_diff; // time elapsed, in microseconds
-	time_diff = ((end_time.tv_sec * 1000000 + end_time.tv_usec) - (start_time.tv_sec * 1000000 + start_time.tv_usec));
-	mbps = ((double)state->rawdev.last_jpeg_size / (double)1048576) / ((double)time_diff / (double)1000000);
-	D6(fprintf(debug_file, "Frame start time: %ld:%ld; frame end time: %ld:%ld; last frame size: %lu\n",
-			start_time.tv_sec, start_time.tv_usec,
-			end_time.tv_sec, end_time.tv_usec,
-			state->rawdev.last_jpeg_size));
-	D6(fprintf(debug_file, "Write speed: %d MB/s\n", mbps));
+//	end_time = get_fpga_time(state->fd_fparmsall[port], port);
+//	unsigned int mbps; // write speed, MB/s
+//	unsigned long long time_diff; // time elapsed, in microseconds
+//	time_diff = ((end_time.tv_sec * 1000000 + end_time.tv_usec) - (start_time.tv_sec * 1000000 + start_time.tv_usec));
+//	mbps = ((double)state->rawdev.last_jpeg_size / (double)1048576) / ((double)time_diff / (double)1000000);
+//	D6(fprintf(debug_file, "Frame start time: %ld:%ld; frame end time: %ld:%ld; last frame size: %lu\n",
+//			start_time.tv_sec, start_time.tv_usec,
+//			end_time.tv_sec, end_time.tv_usec,
+//			state->rawdev.last_jpeg_size));
+//	D6(fprintf(debug_file, "Write speed: %d MB/s\n", mbps));
 
 	return 0;
 }
@@ -880,6 +881,9 @@ void get_disk_info(camogm_state *state)
 	}
 
 	if (get_disk_range(state->rawdev.rawdev_path, &rng) == 0) {
+		state->writer_params.lba_start = rng.from;
+		state->writer_params.lba_end = rng.to;
+		state->writer_params.lba_current = state->writer_params.lba_start;
 		set_disk_range(&rng);
 	} else {
 		D0(fprintf(debug_file, "ERROR: unable to get disk size and starting sector\n"));

src/camogm.h

@@ -27,7 +27,6 @@
 #include <elphel/c313a.h>
 #include <elphel/x393_devices.h>
 
-
 #define CAMOGM_FRAME_NOT_READY    1        ///< frame pointer valid, but not yet acquired
 #define CAMOGM_FRAME_INVALID      2        ///< invalid frame pointer
 #define CAMOGM_FRAME_CHANGED      3        ///< frame parameters have changed
@@ -150,6 +149,16 @@ struct writer_params {
 	int last_ret_val;                                       ///< error value return during last frame recording (if any occurred)
 	bool exit_thread;                                       ///< flag indicating that the writing thread should terminate
 	int state;                                              ///< the state of disk writing thread
+	int segments;                                           ///< the number of segments in frame
+
+	struct iovec *data_chunks;                              ///< a set of vectors pointing to aligned frame data buffers
+	struct iovec prev_rem_vect;                             ///< vector pointing to the remainder of the previous frame
+	unsigned char *rem_buff;                                ///< buffer containing the unaligned remainder of the current frame
+	unsigned char *prev_rem_buff;                           ///< buffer containing the unaligned remainder of the previous frame
+	unsigned char *common_buff;                             ///< buffer for aligned JPEG header
+	uint64_t lba_start;                                     ///< disk starting LBA
+	uint64_t lba_current;                                   ///< current write position in LBAs
+	uint64_t lba_end;                                       ///< disk last LBA
 };
 /**
  * @struct camogm_state

src/camogm_align.h

+/** @file camogm_align.h
+ * @brief Provides frame alignment functions use for recording to block device.
+ * @copyright Copyright (C) 2017 Elphel, Inc.
+ *
+ * @par <b>License</b>
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _CAMOGM_ALIGN_H
+#define _CAMOGM_ALIGN_H
+
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "camogm.h"
+
+#define PHY_BLOCK_SIZE            512            ///< Physical disk block size
+#define JPEG_MARKER_LEN           2              ///< The size in bytes of JPEG marker
+#define JPEG_SIZE_LEN             2              ///< The size in bytes of JPEG marker length field
+#define INCLUDE_REM               1              ///< Include REM buffer to total size calculation
+#define EXCLUDE_REM               0              ///< Exclude REM buffer from total size calculation
+#define MAX_DATA_CHUNKS           9              ///< An array or JPEG frame chunks contains pointers to JPEG leading marker,
+                                                 ///< JPEG header, Exif data if present, stuffing bytes chunk which aligns
+                                                 ///< the frame size to disk sector boundary, JPEG data which
+                                                 ///< can be split into two chunks, align buffers, JPEG
+                                                 ///< trailing marker, and pointer to a buffer containing the remainder of a
+                                                 ///< frame. Nine chunks of data in total.
+#define ALIGNMENT_SIZE            32             ///< Align buffers length to this amount of bytes
+/** Common buffer should be large enough to contain JPEG header, Exif, some alignment bytes and remainder from previous frame */
+#define COMMON_BUFF_SZ            MAX_EXIF_SIZE + JPEG_HEADER_MAXSIZE + ALIGNMENT_SIZE + 2 * PHY_BLOCK_SIZE
+#define REM_BUFF_SZ               2 * PHY_BLOCK_SIZE
+
+///** This structure holds raw device buffer pointers */
+//struct drv_pointers {
+//	uint64_t lba_start;                          ///< raw buffer starting LBA
+//	uint64_t lba_end;                            ///< raw buffer ending LBA
+//	uint64_t lba_write;                          ///< current write pointer inside raw buffer
+//	uint16_t wr_count;                           ///< the number of LBA to write next time
+//};
+
+/** Container structure for frame buffers */
+//struct frame_buffers {
+//	struct fvec exif_buff;                       ///< Exif buffer
+//	struct fvec jpheader_buff;                   ///< JPEG header buffer
+//	struct fvec trailer_buff;                    ///< buffer for trailing marker
+//	struct fvec common_buff;                     ///< common buffer where other parts are combined
+//	struct fvec rem_buff;                        ///< remainder from previous frame
+//};
+
+/** Symbolic names for slots in buffer pointers. Buffer alignment function relies on the order of these names, so
+ * new names can be added but the overall order should not be changed */
+enum {
+	CHUNK_LEADER,                                ///< pointer to JPEG leading marker
+	CHUNK_EXIF,                                  ///< pointer to Exif buffer
+	CHUNK_HEADER,                                ///< pointer to JPEG header data excluding leading marker
+	CHUNK_COMMON,                                ///< pointer to common buffer
+	CHUNK_DATA_0,                                ///< pointer to JPEG data
+	CHUNK_DATA_1,                                ///< pointer to the second half of JPEG data if a frame crosses circbuf boundary
+	CHUNK_TRAILER,                               ///< pointer to JPEG trailing marker
+	CHUNK_ALIGN,                                 ///< pointer to buffer where the second part of JPEG data should be aligned
+	CHUNK_REM                                    ///< pointer to buffer containing the remainder of current frame. It will be recorded during next transaction
+};
+
+int init_align_buffers(camogm_state *state);
+void deinit_align_buffers(camogm_state *state);
+void align_frame(camogm_state *state);
+void reset_chunks(struct iovec *vects, int all);
+int update_lba(camogm_state *state);
+int get_data_buffers(camogm_state *state, struct iovec *mapped, size_t all_sz);
+int prep_last_block(camogm_state *state);
+off64_t lba_to_offset(uint64_t lba);
+
+#endif /* _CAMOGM_ALIGN_H */

src/camogm_jpeg.c

@@ -32,12 +32,15 @@
 
 #include "camogm_jpeg.h"
 #include "camogm_read.h"
+#include "camogm_align.h"
 
 /** State file record format. It includes device path in /dev, starting, current and ending LBAs */
 #define STATE_FILE_FORMAT         "%s\t%llu\t%llu\t%llu\n"
 
 /* forward declarations */
 static void *jpeg_writer(void *thread_args);
+static int save_state_file(const rawdev_buffer *rawdev, uint64_t current_pos);
+static int open_state_file(const rawdev_buffer *rawdev, uint64_t *current_pos);
 
 /** Get starting and endign LBAs of the partition specified as raw device buffer */
 static int get_disk_range(struct range *range)
@@ -96,12 +99,12 @@ static int find_state(FILE *f, uint64_t *pos, const rawdev_buffer *rawdev)
 }
 
 /** Read state from file and restore disk write pointer */
-static int open_state_file(const rawdev_buffer *rawdev)
+static int open_state_file(const rawdev_buffer *rawdev, uint64_t *current_pos)
 {
 	int fd, len;
 	FILE *f;
 	int ret = 0;
-	uint64_t curr_pos;
+	uint64_t lba_pos;
 	char buff[SMALL_BUFF_LEN] = {0};
 
 	if (strlen(rawdev->state_path) == 0) {
@@ -110,15 +113,9 @@ static int open_state_file(const rawdev_buffer *rawdev)
 
 	f = fopen(rawdev->state_path, "r");
 	if (f != NULL) {
-		if (find_state(f, &curr_pos, rawdev) != -1) {
-			fd = open(SYSFS_AHCI_LBA_CURRENT, O_WRONLY);
-			if (fd >= 0) {
-				len = snprintf(buff, SMALL_BUFF_LEN, "%llu", curr_pos);
-				write(fd, buff, len + 1);
-				close(fd);
-			} else {
-				ret = -1;
-			}
+		if (find_state(f, &lba_pos, rawdev) != -1) {
+			*current_pos = lba_pos;
+			D0(fprintf(debug_file, "Got starting LBA from state file: %llu\n", lba_pos));
 		}
 		fclose(f);
 	} else {
@@ -129,12 +126,11 @@ static int open_state_file(const rawdev_buffer *rawdev)
 }
 
 /** Save current position of the disk write pointer */
-static int save_state_file(const rawdev_buffer *rawdev)
+static int save_state_file(const rawdev_buffer *rawdev, uint64_t current_pos)
 {
 	int ret = 0;
 	FILE *f;
 	struct range range;
-	uint64_t curr_pos;
 
 	if (strlen(rawdev->state_path) == 0) {
 		return ret;
@@ -143,21 +139,13 @@ static int save_state_file(const rawdev_buffer *rawdev)
 		return -1;
 	}
 
-	// get raw device buffer current postion on disk, this position indicates where recording has stopped
-	f = fopen(SYSFS_AHCI_LBA_CURRENT, "r");
-	if (f == NULL) {
-		return -1;
-	}
-	fscanf(f, "%llu\n", &curr_pos);
-	fclose(f);
-
 	// save pointers to a regular file
 	f = fopen(rawdev->state_path, "w");
 	if (f == NULL) {
 		return -1;
 	}
 	fprintf(f, "Device\t\tStart LBA\tCurrent LBA\tEnd LBA\n");
-	fprintf(f, STATE_FILE_FORMAT, rawdev->rawdev_path, range.from, curr_pos, range.to);
+	fprintf(f, STATE_FILE_FORMAT, rawdev->rawdev_path, range.from, current_pos, range.to);
 	fflush(f);
 	fsync(fileno(f));
 	fclose(f);
@@ -198,6 +186,12 @@ int camogm_init_jpeg(camogm_state *state)
 			D0(fprintf(debug_file, "Can not start writer thread: %s\n", strerror(ret_val)));
 			ret = -1;
 		}
+
+		ret_val = init_align_buffers(state);
+		if (ret_val != 0) {
+			D0(fprintf(debug_file, "Can not initialize alignment buffers\n"));
+			ret = -1;
+		}
 	}
 
 	return ret;
@@ -221,6 +215,8 @@ void camogm_free_jpeg(camogm_state *state)
 	pthread_mutex_unlock(&state->writer_params.writer_mutex);
 	pthread_join(state->writer_params.writer_thread, NULL);
 	state->writer_params.exit_thread = false;
+
+	deinit_align_buffers(state);
 }
 
 /** Calculate the total length of current frame */
@@ -247,6 +243,7 @@ int camogm_start_jpeg(camogm_state *state)
 {
 	char * slash;
 	int rslt;
+	off64_t offset;
 
 	if (!state->rawdev_op) {
 		strcpy(state->path, state->path_prefix);   // make state->path a directory name (will be replaced when the frames will be written)
@@ -264,16 +261,18 @@ int camogm_start_jpeg(camogm_state *state)
 			}
 		}
 	} else {
-//		if (open_state_file(&state->rawdev) != 0) {
-//			D0(fprintf(debug_file, "Could not set write pointer via sysfs, recording will start from the beginning of partition: "
-//					"%s\n", state->rawdev.rawdev_path));
-//		}
+		if (open_state_file(&state->rawdev, &state->writer_params.lba_current) != 0) {
+			D0(fprintf(debug_file, "Could not get write pointer from state file, recording will start from the beginning of partition: "
+					"%s\n", state->rawdev.rawdev_path));
+		}
 		state->writer_params.blockdev_fd = open(state->rawdev.rawdev_path, O_WRONLY);
 		if (state->writer_params.blockdev_fd < 0) {
 			D0(fprintf(debug_file, "Error opening block device: %s\n", state->rawdev.rawdev_path));
 			return -CAMOGM_FRAME_FILE_ERR;
 		}
-		D6(fprintf(debug_file, "Open block device: %s\n", state->rawdev.rawdev_path));
+		offset = lba_to_offset(state->writer_params.lba_current - state->writer_params.lba_start);
+		lseek64(state->writer_params.blockdev_fd, offset, SEEK_SET);
+		D6(fprintf(debug_file, "Open block device: %s, offset in bytes: %llu\n", state->rawdev.rawdev_path, offset));
 	}
 
 	return 0;
@@ -325,6 +324,15 @@ int camogm_frame_jpeg(camogm_state *state)
 		while (state->writer_params.data_ready)
 			pthread_cond_wait(&state->writer_params.main_cond, &state->writer_params.writer_mutex);
 		D6(fprintf(debug_file, "_13a_"));
+
+		D6(fprintf(debug_file, "\n"));
+		align_frame(state);
+		if (update_lba(state) == 1) {
+			D0(fprintf(debug_file, "The end of block device reached, continue recording from start\n"));
+		}
+		D6(fprintf(debug_file, "Block device positions: start = %llu, current = %llu, end = %llu\n",
+				state->writer_params.lba_start, state->writer_params.lba_current, state->writer_params.lba_end));
+
 		// proceed if last frame was recorded without errors
 		if (state->writer_params.last_ret_val == 0) {
 			state->writer_params.data_ready = true;
@@ -336,8 +344,8 @@ int camogm_frame_jpeg(camogm_state *state)
 		}
 
 		// update statistics
-		state->rawdev.last_jpeg_size = camogm_get_jpeg_size(state);
-		state->rawdev.total_rec_len += state->rawdev.last_jpeg_size;
+//		state->rawdev.last_jpeg_size = camogm_get_jpeg_size(state);
+//		state->rawdev.total_rec_len += state->rawdev.last_jpeg_size;
 	}
 
 	return 0;
@@ -353,15 +361,36 @@ int camogm_frame_jpeg(camogm_state *state)
 int camogm_end_jpeg(camogm_state *state)
 {
 	int ret = 0;
+	int bytes;
+	ssize_t iovlen;
 	struct frame_data fdata = {0};
 
 	if (state->rawdev_op) {
+		// write any remaining data, do not use writer thread as there can be only one block left CHUNK_REM buffer
+		pthread_mutex_lock(&state->writer_params.writer_mutex);
+		bytes = prep_last_block(state);
+		if (bytes > 0) {
+			D6(fprintf(debug_file, "Write last block of data, size = %d\n", bytes));
+			// the remaining data block is placed in CHUNK_COMMON buffer, write just this buffer
+			iovlen = writev(state->writer_params.blockdev_fd, &state->writer_params.data_chunks[CHUNK_COMMON], 1);
+			if (iovlen < bytes) {
+				D0(fprintf(debug_file, "writev error: %s (returned %i, expected %i)\n", strerror(errno), iovlen, bytes));
+				state->writer_params.last_ret_val = -CAMOGM_FRAME_FILE_ERR;
+			} else {
+				// update statistic, just one block written
+				state->writer_params.lba_current += 1;
+				state->rawdev.total_rec_len += bytes;
+			}
+			reset_chunks(state->writer_params.data_chunks, 1);
+		}
+		pthread_mutex_unlock(&state->writer_params.writer_mutex);
+
 		D6(fprintf(debug_file, "Closing block device %s\n", state->rawdev.rawdev_path));
 		ret = close(state->writer_params.blockdev_fd);
 		if (ret == -1)
 			D0(fprintf(debug_file, "Error: %s\n", strerror(errno)));
 
-//		save_state_file(&state->rawdev);
+		save_state_file(&state->rawdev, state->writer_params.lba_current);
 	}
 	return ret;
 }
@@ -395,25 +424,40 @@ void *jpeg_writer(void *thread_args)
 		if (params->data_ready) {
 			l = 0;
 			state->writer_params.last_ret_val = 0;
-			for (int i = 0; i < (state->chunk_index) - 1; i++) {
-				chunks_iovec[i].iov_base = state->packetchunks[i + 1].chunk;
-				chunks_iovec[i].iov_len = state->packetchunks[i + 1].bytes;
-				l += chunks_iovec[i].iov_len;
-			}
-			chunk_index = state->chunk_index;
-			iovlen = writev(state->writer_params.blockdev_fd, chunks_iovec, chunk_index - 1);
-			if (iovlen < l) {
-				D0(fprintf(debug_file, "writev error: %s (returned %li, expected %li)\n", strerror(errno), iovlen, l));
+//			for (int i = 0; i < (state->chunk_index) - 1; i++) {
+//				chunks_iovec[i].iov_base = state->packetchunks[i + 1].chunk;
+//				chunks_iovec[i].iov_len = state->packetchunks[i + 1].bytes;
+//				l += chunks_iovec[i].iov_len;
+//			}
+//			chunk_index = state->chunk_index;
+			chunk_index = get_data_buffers(state, &chunks_iovec, FILE_CHUNKS_NUM);
+			if (chunk_index > 0) {
+				for (int i = 0; i < chunk_index; i++)
+					l += chunks_iovec[i].iov_len;
+				iovlen = writev(state->writer_params.blockdev_fd, chunks_iovec, chunk_index);
+				if (iovlen < l) {
+					D0(fprintf(debug_file, "writev error: %s (returned %i, expected %i)\n", strerror(errno), iovlen, l));
+					state->writer_params.last_ret_val = -CAMOGM_FRAME_FILE_ERR;
+				} else {
+					// update statistic
+					state->rawdev.last_jpeg_size = l;
+					state->rawdev.total_rec_len += state->rawdev.last_jpeg_size;
+					D6(fprintf(debug_file, "Current position in block device: %lld\n", lseek64(state->writer_params.blockdev_fd, 0, SEEK_CUR)));
+				}
+			} else {
+				D0(fprintf(debug_file, "data vector mapping error: %d)\n", chunk_index));
 				state->writer_params.last_ret_val = -CAMOGM_FRAME_FILE_ERR;
 			}
 
 			// release main thread
+			reset_chunks(state->writer_params.data_chunks, 0);
 			params->data_ready = false;
 			pthread_cond_signal(&params->main_cond);
 		}
 	}
 	params->state = STATE_STOPPED;
 	pthread_mutex_unlock(&state->writer_params.writer_mutex);
+	D5(fprintf(debug_file, "Exit from recording thread\n"));
 
 	return NULL;
 }