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http/http_h264.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "http/http.h"
+#include "hw/buffer.h"
+#include "hw/buffer_lock.h"
+#include "hw/buffer_list.h"
+#include "hw/device.h"
+
+DEFINE_BUFFER_LOCK(http_h264);
+
+static const char *const VIDEO_HEADER = "HTTP/1.0 200 OK\r\n"
+                                         "Access-Control-Allow-Origin: *\r\n"
+                                         "Connection: close\r\n"
+                                         "Content-Type: video/webm;codecs=h264\r\n"
+                                         "\r\n";
+
+void http_h264_capture(buffer_t *buf)
+{
+  buffer_lock_capture(&http_h264, buf);
+}
+
+bool http_h264_needs_buffer()
+{
+  return buffer_lock_needs_buffer(&http_h264);
+}
+
+void http_video(http_worker_t *worker, FILE *stream)
+{
+  bool had_key_frame = false;
+  bool requested_key_frame = false;
+  int counter = 0;
+  fprintf(stream, VIDEO_HEADER);
+
+  buffer_lock_use(&http_h264, 1);
+
+  while (!feof(stream)) {
+    buffer_t *buf = buffer_lock_get(&http_h264, 3, &counter);
+    if (!buf) {
+      goto error;
+    }
+
+    if (buf->v4l2_buffer.flags & V4L2_BUF_FLAG_KEYFRAME) {
+      had_key_frame = true;
+      E_LOG_DEBUG(buf, "Got key frame!");
+    }
+
+    if (had_key_frame) {
+      if (!fwrite(buf->start, buf->used, 1, stream)) {
+        goto error;
+      }
+    } else if (!requested_key_frame) {
+      device_force_key(buf->buf_list->device);
+      requested_key_frame = true;
+    }
+    buffer_consumed(buf);
+  }
+
+error:
+  buffer_lock_use(&http_h264, -1);
+}