Activated transfer mode

transfer.c

@@ -0,0 +1,122 @@
+/*
+ * transfer.c: Transfer mode
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: transfer.c 1.1 2002/06/22 13:39:23 kls Exp $
+ */
+
+#include "transfer.h"
+
+//XXX+ also used in recorder.c - find a better place???
+// The size of the array used to buffer video data:
+// (must be larger than MINVIDEODATA - see remux.h)
+#define VIDEOBUFSIZE  MEGABYTE(1)
+
+// --- cTransfer -------------------------------------------------------------
+
+cTransfer::cTransfer(int VPid, int APid1, int APid2, int DPid1, int DPid2)
+:cReceiver(0, 0, 5, VPid, APid1, APid2, DPid1, DPid2)
+{
+  ringBuffer = new cRingBufferLinear(VIDEOBUFSIZE, true);
+  remux = new cRemux(VPid, APid1, APid2, DPid1, DPid2);
+  gotBufferReserve = false;
+  active = false;
+}
+
+cTransfer::~cTransfer()
+{
+  cReceiver::Detach();
+  cPlayer::Detach();
+  delete remux;
+  delete ringBuffer;
+}
+
+void cTransfer::Activate(bool On)
+{
+  if (On) {
+     if (!active)
+        Start();
+     }
+  else if (active) {
+     active = false;
+     Cancel(3);
+     }
+}
+
+void cTransfer::Receive(uchar *Data, int Length)
+{
+  int p = ringBuffer->Put(Data, Length);
+  if (p != Length && active)
+     esyslog("ERROR: ring buffer overflow (%d bytes dropped)", Length - p);
+}
+
+void cTransfer::Action(void)
+{
+  dsyslog("transfer thread started (pid=%d)", getpid());
+
+  uchar b[MINVIDEODATA];
+  int r = 0;
+  active = true;
+  while (active) {
+
+        //XXX+ Maybe we need this to avoid "buffer empty" log messages from the driver.
+        //XXX+ But then again, it appears to play just fine without this...
+        /*
+        if (!gotBufferReserve) {
+           if (ringBuffer->Available() < 4 * MAXFRAMESIZE) {
+              usleep(100000); // allow the buffer to collect some reserve
+              continue;
+              }
+           else
+              gotBufferReserve = true;
+           }
+           */
+
+        // Get data from the buffer:
+
+        int g = ringBuffer->Get(b + r, sizeof(b) - r);
+        if (g > 0)
+           r += g;
+
+        // Play the data:
+
+        if (r > 0) {
+           int Count = r, Result;
+           const uchar *p = remux->Process(b, Count, Result);
+           if (p) {
+              //XXX+ StripAudio???
+              while (Result > 0 && active) {
+                    int w = PlayVideo(p, Result);
+                    if (w > 0) {
+                       p += w;
+                       Result -= w;
+                       }
+                    else if (w < 0 && FATALERRNO) {
+                       LOG_ERROR;
+                       break;
+                       }
+                    }
+              }
+           if (Count > 0) {
+              r -= Count;
+              if (r > 0)
+                 memmove(b, b + Count, r);
+              }
+           }
+        }
+
+  dsyslog("transfer thread ended (pid=%d)", getpid());
+}
+
+void cTransfer::SetAudioPid(int APid)
+{
+  /*XXX+
+  Clear();
+  //XXX we may need to have access to the audio device, too, in order to clear it
+  CHECK(ioctl(toDevice, VIDEO_CLEAR_BUFFER));
+  gotBufferReserve = false;
+  remux.SetAudioPid(APid);
+  XXX*/
+}