debug: dump all buffers to path specified by CAMERA_DEBUG_CAPTURE

device/camera/camera_debug.c

@@ -0,0 +1,40 @@
+#include "device/buffer.h"
+#include "device/buffer_list.h"
+#include "device/links.h"
+#include "device/camera/camera.h"
+#include "util/opts/log.h"
+#include "util/opts/fourcc.h"
+#include "output/output.h"
+
+#include <sys/stat.h>
+
+static void debug_capture_on_buffer(buffer_t *buf)
+{
+  if (!buf) {
+    return;
+  }
+
+  char path[256];
+  sprintf(path, "%s/decoder_capture.%d.%s", getenv("CAMERA_DEBUG_CAPTURE"), buf->index, fourcc_to_string(buf->buf_list->fmt.format).buf);
+
+  FILE *fp = fopen(path, "wb");
+  if (!fp) {
+    return;
+  }
+
+  fwrite(buf->start, 1, buf->used, fp);
+  fclose(fp);
+}
+
+static link_callbacks_t debug_capture_callbacks = {
+  .name = "DEBUG-CAPTURE",
+  .on_buffer = debug_capture_on_buffer
+};
+
+void camera_debug_capture(camera_t *camera, buffer_list_t *capture)
+{
+  if (getenv("CAMERA_DEBUG_CAPTURE")) {
+    mkdir(getenv("CAMERA_DEBUG_CAPTURE"), 0755);
+    camera_capture_add_callbacks(camera, capture, debug_capture_callbacks);
+  }
+}