v4l2 audio/video outputs for linux 2.6.22+ kernels (outputs formerly known as ivtv)

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@23925 b3059339-0415-0410-9bf9-f77b7e298cf2

2 files changed, 268 insertions, 0 deletions

diff --git a/libvo/video_out.c b/libvo/video_out.c
index 4b85b99a46..14899b82a5 100644
--- a/libvo/video_out.c
+++ b/libvo/video_out.c
@@ -103,6 +103,9 @@ extern vo_functions_t video_out_dxr3;
 #ifdef HAVE_IVTV
 extern vo_functions_t video_out_ivtv;
 #endif
+#ifdef HAVE_V4L2_DECODER
+extern vo_functions_t video_out_v4l2;
+#endif
 #ifdef HAVE_JPEG
 extern vo_functions_t video_out_jpeg;
 #endif
@@ -214,6 +217,9 @@ vo_functions_t* video_out_drivers[] =
 #ifdef HAVE_IVTV
         &video_out_ivtv,
 #endif
+#ifdef HAVE_V4L2_DECODER
+        &video_out_v4l2,
+#endif
 #ifdef HAVE_ZR
 	&video_out_zr,
 	&video_out_zr2,
diff --git a/libvo/vo_v4l2.c b/libvo/vo_v4l2.c
new file mode 100644
index 0000000000..65dd22ac35
--- /dev/null
+++ b/libvo/vo_v4l2.c
@@ -0,0 +1,262 @@
+/*
+ *  Copyright (C) 2007 Benjamin Zores
+ *   Video output for V4L2 hardware MPEG decoders.
+ *
+ *   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 2 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, write to the Free Software Foundation,
+ *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/ioctl.h>
+
+#include "mp_msg.h"
+#include "subopt-helper.h"
+#include "video_out.h"
+#include "video_out_internal.h"
+#include "libmpdemux/mpeg_packetizer.h"
+
+#define DEFAULT_MPEG_DECODER "/dev/video16"
+#define V4L2_VO_HDR "VO: [v4l2]"
+
+int v4l2_fd = -1;
+static vo_mpegpes_t *pes;
+
+/* suboptions */
+static int output = -1;
+static char *device = NULL;
+
+static opt_t subopts[] = {
+  {"output",   OPT_ARG_INT,       &output,       (opt_test_f)int_non_neg},
+  {"device",   OPT_ARG_MSTRZ,     &device,       NULL},
+  {NULL}
+};
+
+static vo_info_t info = 
+{
+  "V4L2 MPEG Video Decoder Output",
+  "v4l2",
+  "Benjamin Zores",
+  ""
+};
+LIBVO_EXTERN (v4l2)
+
+int
+v4l2_write (unsigned char *data, int len)
+{
+  if (v4l2_fd < 0)
+    return 0;
+  
+  return write (v4l2_fd, data, len);
+}
+
+/* video out functions */
+
+static int
+config (uint32_t width, uint32_t height,
+        uint32_t d_width, uint32_t d_height,
+        uint32_t fullscreen, char *title, uint32_t format)
+{
+  return 0;
+}
+
+static int
+preinit (const char *arg)
+{
+  struct v4l2_output vout;
+  struct v4l2_ext_controls ctrls;
+  int err;
+
+  if (subopt_parse (arg, subopts) != 0)
+  {
+    mp_msg (MSGT_VO, MSGL_FATAL,
+            "\n-vo v4l2 command line help:\n"
+            "Example: mplayer -vo v4l2:device=/dev/video16:output=2\n"
+            "\nOptions:\n"
+            "  device=/dev/videoX\n"
+            "    Name of the MPEG decoder device file.\n"
+            "  output=<0-...>\n"
+            "    V4L2 id of the TV output.\n"
+            "\n" );
+    return -1;
+  }
+  
+  if (!device)
+    device = strdup (DEFAULT_MPEG_DECODER);    
+  
+  v4l2_fd = open (device, O_RDWR);
+  if (v4l2_fd < 0)
+  {  
+    free (device);
+    mp_msg (MSGT_VO, MSGL_FATAL, "%s %s\n", V4L2_VO_HDR, strerror (errno));
+    return -1;
+  }
+
+  /* check for device hardware MPEG decoding capability */
+  ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG; 
+  ctrls.count = 0; 
+  ctrls.controls = NULL;
+  
+  if (ioctl (v4l2_fd, VIDIOC_G_EXT_CTRLS, &ctrls) < 0)
+  {
+    free (device);
+    mp_msg (MSGT_OPEN, MSGL_FATAL, "%s %s\n", V4L2_VO_HDR, strerror (errno));
+    return -1;
+  }
+  
+  /* list available outputs */
+  vout.index = 0;
+  err = 1;
+  mp_msg (MSGT_VO, MSGL_INFO, "%s Available video outputs: ", V4L2_VO_HDR);
+  while (ioctl (v4l2_fd, VIDIOC_ENUMOUTPUT, &vout) >= 0)
+  {
+    err = 0;
+    mp_msg (MSGT_VO, MSGL_INFO, "'#%d, %s' ", vout.index, vout.name);
+    vout.index++;
+  }
+  if (err)
+  {
+    mp_msg (MSGT_VO, MSGL_INFO, "none\n");
+    free (device);
+    return -1;
+  }
+  else
+    mp_msg (MSGT_VO, MSGL_INFO, "\n");
+
+  /* set user specified output */
+  if (output != -1)
+  {
+    if (ioctl (v4l2_fd, VIDIOC_S_OUTPUT, &output) < 0)
+    {
+      mp_msg (MSGT_VO, MSGL_ERR,
+              "%s can't set output (%s)\n", V4L2_VO_HDR, strerror (errno));
+      free (device);
+      return -1;
+    }
+  }
+
+  /* display device name */
+  mp_msg (MSGT_VO, MSGL_INFO, "%s using %s\n", V4L2_VO_HDR, device);
+  free (device);
+
+  /* display current video output */
+  if (ioctl (v4l2_fd, VIDIOC_G_OUTPUT, &output) == 0)
+  {
+    vout.index = output;
+    if (ioctl (v4l2_fd, VIDIOC_ENUMOUTPUT, &vout) < 0)
+    {
+      mp_msg (MSGT_VO, MSGL_ERR,
+              "%s can't get output (%s).\n", V4L2_VO_HDR, strerror (errno));
+      return -1;
+    }
+    else
+      mp_msg (MSGT_VO, MSGL_INFO,
+              "%s video output: %s\n", V4L2_VO_HDR, vout.name);
+  }
+  else
+  {
+    mp_msg (MSGT_VO, MSGL_ERR,
+            "%s can't get output (%s).\n", V4L2_VO_HDR, strerror (errno));
+    return -1;
+  }
+  
+  return 0;
+}
+
+static void
+draw_osd (void)
+{
+  /* do nothing */
+}
+
+static int
+draw_frame (uint8_t * src[])
+{
+  pes = (vo_mpegpes_t *) src[0];
+  return 0;
+}
+
+static void
+flip_page (void)
+{
+  if (v4l2_fd < 0)
+    return;
+
+  if (!pes)
+    return;
+
+  send_mpeg_pes_packet (pes->data, pes->size, pes->id,
+                        pes->timestamp ? pes->timestamp : vo_pts, 2,
+                        v4l2_write);
+
+  /* ensure flip_page() won't be called twice */
+  pes = NULL;
+}
+
+static int
+draw_slice (uint8_t *image[], int stride[], int w, int h, int x, int y)
+{
+  return 0;
+}
+
+static void
+uninit (void)
+{
+  if (v4l2_fd < 0)
+    return;
+
+  /* close device */
+  close (v4l2_fd);
+  v4l2_fd = -1;
+}
+
+static void
+check_events (void)
+{
+  /* do nothing */
+}
+
+static int
+query_format (uint32_t format)
+{
+  if (format != IMGFMT_MPEGPES)
+    return 0;
+    
+  return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_TIMER;
+}
+
+static int
+control (uint32_t request, void *data, ...)
+{
+  switch (request)
+  {
+  case VOCTRL_QUERY_FORMAT:
+    return query_format (*((uint32_t*) data));
+  }
+  
+  return VO_NOTIMPL;
+}