Optimise usage of videodev2.h header

cmd/camera_stream.c

@@ -1,6 +1,7 @@
 #include "http/http.h"
 #include "opts/opts.h"
 #include "opts/log.h"
+#include "opts/fourcc.h"
 #include "device/camera/camera.h"
 
 #include <signal.h>

device/buffer.c

@@ -1,7 +1,7 @@
 #include "device/buffer.h"
 #include "device/buffer_list.h"
 #include "device/device.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 buffer_t *buffer_open(const char *name, buffer_list_t *buf_list, int index) {
   buffer_t *buf = calloc(1, sizeof(buffer_t));

device/buffer.h

@@ -3,7 +3,6 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <stddef.h>
-#include <linux/videodev2.h>
 
 typedef struct buffer_s buffer_t;
 typedef struct buffer_list_s buffer_list_t;
@@ -19,6 +18,10 @@ typedef struct buffer_s {
   size_t length;
   int dma_fd;
 
+  struct {
+    bool is_keyframe : 1;
+  } flags;
+
   struct {
     unsigned flags;
   } v4l2;

device/buffer_list.c

@@ -1,7 +1,7 @@
 #include "device/buffer.h"
 #include "device/buffer_list.h"
 #include "device/device.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 buffer_list_t *buffer_list_open(const char *name, struct device_s *dev, bool do_capture, bool do_mmap)
 {

device/buffer_list.h

@@ -2,7 +2,6 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-#include <linux/videodev2.h>
 
 typedef struct buffer_s buffer_t;
 typedef struct device_s device_t;

device/buffer_lock.c

@@ -1,7 +1,7 @@
 #include "device/buffer_lock.h"
 #include "device/buffer_list.h"
 #include "device/buffer.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 bool buffer_lock_is_used(buffer_lock_t *buf_lock)
 {

device/buffer_queue.c

@@ -1,7 +1,7 @@
 #include "device/buffer.h"
 #include "device/buffer_list.h"
 #include "device/device.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 #include <pthread.h>
 
@@ -102,9 +102,7 @@ int buffer_list_enqueue(buffer_list_t *buf_list, buffer_t *dma_buf)
     return 0;
   }
 
-  buf->v4l2.flags = 0;
-  buf->v4l2.flags &= ~V4L2_BUF_FLAG_KEYFRAME;
-  buf->v4l2.flags |= dma_buf->v4l2.flags & V4L2_BUF_FLAG_KEYFRAME;
+  buf->flags = dma_buf->flags;
   buf->captured_time_us = dma_buf->captured_time_us;
 
   if (buf_list->do_mmap) {

device/camera/camera.c

@@ -3,7 +3,8 @@
 #include "device/device.h"
 #include "device/buffer_list.h"
 #include "device/links.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
+#include "opts/fourcc.h"
 
 void camera_init(camera_t *camera)
 {

device/camera/camera_decoder.c

@@ -4,7 +4,8 @@
 #include "device/buffer_list.h"
 #include "device/device.h"
 #include "device/links.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
+#include "opts/fourcc.h"
 #include "device/buffer_list.h"
 #include "http/http.h"
 

device/camera/camera_direct.c

@@ -4,7 +4,8 @@
 #include "device/buffer_list.h"
 #include "device/device.h"
 #include "device/links.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
+#include "opts/fourcc.h"
 #include "device/buffer_list.h"
 #include "http/http.h"
 

device/camera/camera_isp.c

@@ -4,7 +4,8 @@
 #include "device/buffer_list.h"
 #include "device/device.h"
 #include "device/links.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
+#include "opts/fourcc.h"
 #include "device/buffer_list.h"
 #include "http/http.h"
 

device/camera/camera_legacy_isp.c

@@ -4,7 +4,8 @@
 #include "device/buffer_list.h"
 #include "device/device.h"
 #include "device/links.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
+#include "opts/fourcc.h"
 #include "device/buffer_list.h"
 #include "http/http.h"
 

device/device.c

@@ -1,7 +1,7 @@
 #include "device/device.h"
 #include "device/buffer.h"
 #include "device/buffer_list.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 #include "opts/opts.h"
 
 device_t *device_open(const char *name, const char *path, device_hw_t *hw) {

device/device.h

@@ -2,7 +2,6 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-#include <linux/videodev2.h>
 
 typedef struct buffer_s buffer_t;
 typedef struct buffer_list_s buffer_list_t;

device/hw/v4l2.h

@@ -1,28 +0,0 @@
-#pragma once
-
-#include <stdlib.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <string.h>
-#include <math.h>
-#include <fcntl.h>
-#include <poll.h>
-#include <errno.h>
-#include <assert.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <pthread.h>
-
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-
-#include <linux/videodev2.h>
-#include <linux/v4l2-subdev.h>
-
-#include "opts/log.h"
-
-typedef struct {
-	char buf[10];
-} fourcc_string;
-
-fourcc_string fourcc_to_string(unsigned format);

device/links.c

@@ -2,7 +2,7 @@
 #include "device/device.h"
 #include "device/buffer.h"
 #include "device/buffer_list.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 #define N_FDS 50
 #define QUEUE_ON_CAPTURE // seems to provide better latency

device/v4l2/buffer.c

@@ -1,7 +1,8 @@
-#include "device/v4l2/v4l2.h"
+#include "v4l2.h"
 #include "device/buffer.h"
 #include "device/buffer_list.h"
 #include "device/device.h"
+#include "opts/log.h"
 
 int v4l2_buffer_open(buffer_t *buf)
 {
@@ -78,7 +79,9 @@ int v4l2_buffer_enqueue(buffer_t *buf, const char *who)
 
   v4l2_buf.type = buf->buf_list->v4l2.type;
   v4l2_buf.index = buf->index;
-  v4l2_buf.flags = buf->v4l2.flags;
+  v4l2_buf.flags = 0;
+  if (buf->flags.is_keyframe)
+    v4l2_buf.flags |= V4L2_BUF_FLAG_KEYFRAME;
 
   if (buf->buf_list->do_mmap) {
     assert(buf->dma_source == NULL);
@@ -154,6 +157,7 @@ int v4l2_buffer_list_dequeue(buffer_list_t *buf_list, buffer_t **bufp)
   }
 
   buf->v4l2.flags = v4l2_buf.flags;
+  buf->flags.is_keyframe = (v4l2_buf.flags & V4L2_BUF_FLAG_KEYFRAME) != 0;
   buf->captured_time_us = get_time_us(CLOCK_FROM_PARAMS, NULL, &v4l2_buf.timestamp, 0);
   return 0;
 

device/v4l2/buffer_list.c

@@ -1,7 +1,9 @@
-#include "device/v4l2/v4l2.h"
+#include "v4l2.h"
 #include "device/buffer.h"
 #include "device/buffer_list.h"
 #include "device/device.h"
+#include "opts/log.h"
+#include "opts/fourcc.h"
 
 int v4l2_buffer_list_set_format(buffer_list_t *buf_list, unsigned width, unsigned height, unsigned format, unsigned bytesperline)
 {

device/v4l2/debug.c

@@ -1,6 +1,7 @@
-#include "device/v4l2/v4l2.h"
+#include "v4l2.h"
 #include "device/buffer_list.h"
 #include "device/device.h"
+#include "opts/log.h"
 
 int v4l2_buffer_list_refresh_states(buffer_list_t *buf_list)
 {

device/v4l2/device.c

@@ -1,6 +1,6 @@
-#include "device/v4l2/v4l2.h"
-#include "device/hw/v4l2.h"
+#include "v4l2.h"
 #include "device/device.h"
+#include "opts/log.h"
 
 int v4l2_device_open(device_t *dev)
 {

device/v4l2/device_hw.c

@@ -1,27 +0,0 @@
-#include "device/v4l2/v4l2.h"
-#include "device/hw/v4l2.h"
-#include "device/device.h"
-
-device_hw_t v4l2_device_hw = {
-  .device_open = v4l2_device_open,
-  .device_close = v4l2_device_close,
-  .device_set_decoder_start = v4l2_device_set_decoder_start,
-  .device_video_force_key = v4l2_device_video_force_key,
-  .device_set_fps = v4l2_device_set_fps,
-  .device_set_option = v4l2_device_set_option,
-
-  .buffer_open = v4l2_buffer_open,
-  .buffer_close = v4l2_buffer_close,
-  .buffer_enqueue = v4l2_buffer_enqueue,
-
-  .buffer_list_dequeue = v4l2_buffer_list_dequeue,
-  .buffer_list_pollfd = v4l2_buffer_list_pollfd,
-  .buffer_list_set_format = v4l2_buffer_list_set_format,
-  .buffer_list_set_buffers = v4l2_buffer_list_set_buffers,
-  .buffer_list_set_stream = v4l2_buffer_list_set_stream
-};
-
-device_t *device_v4l2_open(const char *name, const char *path)
-{
-  return device_open(name, path, &v4l2_device_hw);
-}

device/v4l2/device_media.c

@@ -1,6 +1,7 @@
-#include "device/v4l2/v4l2.h"
+#include "v4l2.h"
+
 #include "device/device.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 #include <unistd.h>
 #include <dirent.h>

device/v4l2/device_options.c

@@ -1,6 +1,6 @@
-#include "device/v4l2/v4l2.h"
-#include "device/hw/v4l2.h"
+#include "v4l2.h"
 #include "device/device.h"
+#include "opts/log.h"
 
 #include <ctype.h>
 

device/v4l2/v4l2.c

@@ -1,59 +1,26 @@
-#include "device/v4l2/v4l2.h"
+#include "v4l2.h"
+#include "device/device.h"
 
-#include <linux/videodev2.h>
-#include <linux/v4l2-subdev.h>
+device_hw_t v4l2_device_hw = {
+  .device_open = v4l2_device_open,
+  .device_close = v4l2_device_close,
+  .device_set_decoder_start = v4l2_device_set_decoder_start,
+  .device_video_force_key = v4l2_device_video_force_key,
+  .device_set_fps = v4l2_device_set_fps,
+  .device_set_option = v4l2_device_set_option,
 
-int xioctl(const char *name, int fd, int request, void *arg)
+  .buffer_open = v4l2_buffer_open,
+  .buffer_close = v4l2_buffer_close,
+  .buffer_enqueue = v4l2_buffer_enqueue,
+
+  .buffer_list_dequeue = v4l2_buffer_list_dequeue,
+  .buffer_list_pollfd = v4l2_buffer_list_pollfd,
+  .buffer_list_set_format = v4l2_buffer_list_set_format,
+  .buffer_list_set_buffers = v4l2_buffer_list_set_buffers,
+  .buffer_list_set_stream = v4l2_buffer_list_set_stream
+};
+
+device_t *device_v4l2_open(const char *name, const char *path)
 {
-	int retries = XIOCTL_RETRIES;
-	int retval = -1;
-
-	do {
-		retval = ioctl(fd, request, arg);
-	} while (
-		retval
-		&& retries--
-		&& (
-			errno == EINTR
-			|| errno == EAGAIN
-			|| errno == ETIMEDOUT
-		)
-	);
-
-	// cppcheck-suppress knownConditionTrueFalse
-	if (retval && retries <= 0) {
-		E_LOG_PERROR(NULL, "%s: ioctl(%08x) retried %u times; giving up", name, request, XIOCTL_RETRIES);
-	}
-	return retval;
-}
-
-static size_t align_size(size_t size, size_t to)
-{
-	return ((size + (to - 1)) & ~(to - 1));
-}
-
-unsigned fourcc_to_stride(unsigned width, unsigned format)
-{
-	switch (format) {
-		case V4L2_PIX_FMT_YUYV:
-		case V4L2_PIX_FMT_UYVY:
-		case V4L2_PIX_FMT_RGB565:
-			return align_size(width * 2, 32);
-
-		case V4L2_PIX_FMT_YUV420:
-			return align_size(width * 3 / 2, 32);
-
-		case V4L2_PIX_FMT_RGB24:
-			return align_size(width * 3, 32);
-
-		case V4L2_PIX_FMT_SRGGB10P:
-			return align_size(width * 5 / 4, 32);
-
-		case V4L2_PIX_FMT_JPEG:
-		case V4L2_PIX_FMT_H264:
-			return 0;
-
-		default:
-			E_LOG_PERROR(NULL, "Unknown format: %s", fourcc_to_string(format).buf);
-	}
+  return device_open(name, path, &v4l2_device_hw);
 }

device/v4l2/v4l2.h

@@ -1,7 +1,9 @@
 #pragma once
 
-// TODO: temporary
-#include "device/hw/v4l2.h"
+#include <linux/videodev2.h>
+#include <linux/v4l2-subdev.h>
+#include <stdbool.h>
+#include <stdint.h>
 
 typedef struct buffer_s buffer_t;
 typedef struct buffer_list_s buffer_list_t;
@@ -29,18 +31,3 @@ int v4l2_buffer_list_set_stream(buffer_list_t *buf_list, bool do_on);
 int v4l2_device_open_media_device(device_t *dev);
 int v4l2_device_open_v4l2_subdev(device_t *dev, int subdev);
 int v4l2_device_set_pad_format(device_t *dev, unsigned width, unsigned height, unsigned format);
-
-#ifndef CFG_XIOCTL_RETRIES
-#	define CFG_XIOCTL_RETRIES 4
-#endif
-#define XIOCTL_RETRIES ((unsigned)(CFG_XIOCTL_RETRIES))
-
-unsigned fourcc_to_stride(unsigned width, unsigned format);
-int xioctl(const char *name, int fd, int request, void *arg);
-
-#define E_XIOCTL(dev, _fd, _request, _value, _msg, ...) do { \
-		int ret; \
-		if ((ret = xioctl(dev_name(dev), _fd, _request, _value)) < 0) { \
-			E_LOG_ERROR(dev, "xioctl(ret=%d): " _msg, ret, ##__VA_ARGS__); \
-		} \
-	} while(0)

http/http.c

@@ -11,7 +11,7 @@
 #include <signal.h>
 
 #include "http/http.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 #define BUFSIZE 256
 

http/http_h264.c

@@ -52,7 +52,7 @@ bool h264_is_key_frame(buffer_t *buf)
 {
   unsigned char *data = buf->start;
 
-  if (buf->v4l2.flags & V4L2_BUF_FLAG_KEYFRAME) {
+  if (buf->flags.is_keyframe) {
     E_LOG_DEBUG(buf, "Got key frame (from V4L2)!");
     return true;
   } else if (buf->used >= 5 && (data[4] & 0x1F) == 0x07) {

opts/fourcc.c

@@ -1,4 +1,4 @@
-#include "v4l2.h"
+#include "fourcc.h"
 
 fourcc_string fourcc_to_string(unsigned format)
 {

opts/fourcc.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <linux/videodev2.h>
+
+typedef struct {
+	char buf[10];
+} fourcc_string;
+
+fourcc_string fourcc_to_string(unsigned format);

opts/log.c

@@ -82,3 +82,27 @@ uint64_t get_monotonic_time_us(struct timespec *ts, struct timeval *tv)
 {
 	return get_time_us(CLOCK_MONOTONIC, ts, tv, 0);
 }
+
+int xioctl(const char *name, int fd, int request, void *arg)
+{
+	int retries = XIOCTL_RETRIES;
+	int retval = -1;
+
+	do {
+		retval = ioctl(fd, request, arg);
+	} while (
+		retval
+		&& retries--
+		&& (
+			errno == EINTR
+			|| errno == EAGAIN
+			|| errno == ETIMEDOUT
+		)
+	);
+
+	// cppcheck-suppress knownConditionTrueFalse
+	if (retval && retries <= 0) {
+		E_LOG_PERROR(NULL, "%s: ioctl(%08x) retried %u times; giving up", name, request, XIOCTL_RETRIES);
+	}
+	return retval;
+}

opts/log.h

@@ -1,11 +1,25 @@
 #pragma once
 
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+#include <math.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <pthread.h>
 #include <stdio.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <time.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
 
 #define __FILENAME__ __FILE__
 
@@ -35,3 +49,17 @@ bool filter_log(const char *filename);
 uint64_t get_monotonic_time_us(struct timespec *ts, struct timeval *tv);
 uint64_t get_time_us(clockid_t clock, struct timespec *ts, struct timeval *tv, int64_t delays_us);
 int shrink_to_block(int size, int block);
+
+#ifndef CFG_XIOCTL_RETRIES
+#	define CFG_XIOCTL_RETRIES 4
+#endif
+#define XIOCTL_RETRIES ((unsigned)(CFG_XIOCTL_RETRIES))
+
+int xioctl(const char *name, int fd, int request, void *arg);
+
+#define E_XIOCTL(dev, _fd, _request, _value, _msg, ...) do { \
+		int ret; \
+		if ((ret = xioctl(dev_name(dev), _fd, _request, _value)) < 0) { \
+			E_LOG_ERROR(dev, "xioctl(ret=%d): " _msg, ret, ##__VA_ARGS__); \
+		} \
+	} while(0)

opts/opts.c

@@ -1,5 +1,5 @@
 #include "opts.h"
-#include "device/hw/v4l2.h"
+#include "opts/log.h"
 
 #include <stddef.h>
 #include <stdio.h>