libvo/vo_v4l2.c

   1 /*
   2  * video output for V4L2 hardware MPEG decoders
   3  *
   4  * Copyright (C) 2007 Benjamin Zores
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <sys/ioctl.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <stdlib.h>
  35 #include <inttypes.h>
  36 #include <linux/types.h>
  37 #include <linux/videodev2.h>
  38 #include <linux/ioctl.h>
  39
  40 #include "mp_msg.h"
  41 #include "subopt-helper.h"
  42 #include "video_out.h"
  43 #include "video_out_internal.h"
  44 #include "libmpdemux/mpeg_packetizer.h"
  45
  46 #define DEFAULT_MPEG_DECODER "/dev/video16"
  47 #define V4L2_VO_HDR "VO: [v4l2]"
  48
  49 int v4l2_fd = -1;
  50 static vo_mpegpes_t *pes;
  51
  52 /* suboptions */
  53 static int output = -1;
  54 static char *device = NULL;
  55
  56 static opt_t subopts[] = {
  57   {"output",   OPT_ARG_INT,       &output,       (opt_test_f)int_non_neg},
  58   {"device",   OPT_ARG_MSTRZ,     &device,       NULL},
  59   {NULL}
  60 };
  61
  62 static const vo_info_t info =
  63 {
  64   "V4L2 MPEG Video Decoder Output",
  65   "v4l2",
  66   "Benjamin Zores",
  67   ""
  68 };
  69 const LIBVO_EXTERN (v4l2)
  70
  71 int
  72 v4l2_write (unsigned char *data, int len)
  73 {
  74   if (v4l2_fd < 0)
  75     return 0;
  76
  77   return write (v4l2_fd, data, len);
  78 }
  79
  80 /* video out functions */
  81
  82 static int
  83 config (uint32_t width, uint32_t height,
  84         uint32_t d_width, uint32_t d_height,
  85         uint32_t fullscreen, char *title, uint32_t format)
  86 {
  87   return 0;
  88 }
  89
  90 static int
  91 preinit (const char *arg)
  92 {
  93   struct v4l2_output vout;
  94   struct v4l2_ext_controls ctrls;
  95   int err;
  96
  97   if (subopt_parse (arg, subopts) != 0)
  98   {
  99     mp_msg (MSGT_VO, MSGL_FATAL,
 100             "\n-vo v4l2 command line help:\n"
 101             "Example: mplayer -vo v4l2:device=/dev/video16:output=2\n"
 102             "\nOptions:\n"
 103             "  device=/dev/videoX\n"
 104             "    Name of the MPEG decoder device file.\n"
 105             "  output=<0-...>\n"
 106             "    V4L2 id of the TV output.\n"
 107             "\n" );
 108     return -1;
 109   }
 110
 111   if (!device)
 112     device = strdup (DEFAULT_MPEG_DECODER);
 113
 114   v4l2_fd = open (device, O_RDWR);
 115   if (v4l2_fd < 0)
 116   {
 117     free (device);
 118     mp_msg (MSGT_VO, MSGL_FATAL, "%s %s\n", V4L2_VO_HDR, strerror (errno));
 119     return -1;
 120   }
 121
 122   /* check for device hardware MPEG decoding capability */
 123   ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
 124   ctrls.count = 0;
 125   ctrls.controls = NULL;
 126
 127   if (ioctl (v4l2_fd, VIDIOC_G_EXT_CTRLS, &ctrls) < 0)
 128   {
 129     free (device);
 130     mp_msg (MSGT_OPEN, MSGL_FATAL, "%s %s\n", V4L2_VO_HDR, strerror (errno));
 131     return -1;
 132   }
 133
 134   /* list available outputs */
 135   vout.index = 0;
 136   err = 1;
 137   mp_msg (MSGT_VO, MSGL_INFO, "%s Available video outputs: ", V4L2_VO_HDR);
 138   while (ioctl (v4l2_fd, VIDIOC_ENUMOUTPUT, &vout) >= 0)
 139   {
 140     err = 0;
 141     mp_msg (MSGT_VO, MSGL_INFO, "'#%d, %s' ", vout.index, vout.name);
 142     vout.index++;
 143   }
 144   if (err)
 145   {
 146     mp_msg (MSGT_VO, MSGL_INFO, "none\n");
 147     free (device);
 148     return -1;
 149   }
 150   else
 151     mp_msg (MSGT_VO, MSGL_INFO, "\n");
 152
 153   /* set user specified output */
 154   if (output != -1)
 155   {
 156     if (ioctl (v4l2_fd, VIDIOC_S_OUTPUT, &output) < 0)
 157     {
 158       mp_msg (MSGT_VO, MSGL_ERR,
 159               "%s can't set output (%s)\n", V4L2_VO_HDR, strerror (errno));
 160       free (device);
 161       return -1;
 162     }
 163   }
 164
 165   /* display device name */
 166   mp_msg (MSGT_VO, MSGL_INFO, "%s using %s\n", V4L2_VO_HDR, device);
 167   free (device);
 168
 169   /* display current video output */
 170   if (ioctl (v4l2_fd, VIDIOC_G_OUTPUT, &output) == 0)
 171   {
 172     vout.index = output;
 173     if (ioctl (v4l2_fd, VIDIOC_ENUMOUTPUT, &vout) < 0)
 174     {
 175       mp_msg (MSGT_VO, MSGL_ERR,
 176               "%s can't get output (%s).\n", V4L2_VO_HDR, strerror (errno));
 177       return -1;
 178     }
 179     else
 180       mp_msg (MSGT_VO, MSGL_INFO,
 181               "%s video output: %s\n", V4L2_VO_HDR, vout.name);
 182   }
 183   else
 184   {
 185     mp_msg (MSGT_VO, MSGL_ERR,
 186             "%s can't get output (%s).\n", V4L2_VO_HDR, strerror (errno));
 187     return -1;
 188   }
 189
 190   return 0;
 191 }
 192
 193 static void
 194 draw_osd (void)
 195 {
 196   /* do nothing */
 197 }
 198
 199 static int
 200 draw_frame (uint8_t * src[])
 201 {
 202   pes = (vo_mpegpes_t *) src[0];
 203   return 0;
 204 }
 205
 206 static void
 207 flip_page (void)
 208 {
 209   if (v4l2_fd < 0)
 210     return;
 211
 212   if (!pes)
 213     return;
 214
 215   send_mpeg_pes_packet (pes->data, pes->size, pes->id,
 216                         pes->timestamp ? pes->timestamp : vo_pts, 2,
 217                         v4l2_write);
 218
 219   /* ensure flip_page() won't be called twice */
 220   pes = NULL;
 221 }
 222
 223 static int
 224 draw_slice (uint8_t *image[], int stride[], int w, int h, int x, int y)
 225 {
 226   return 0;
 227 }
 228
 229 static void
 230 uninit (void)
 231 {
 232   if (v4l2_fd < 0)
 233     return;
 234
 235   /* close device */
 236   close (v4l2_fd);
 237   v4l2_fd = -1;
 238 }
 239
 240 static void
 241 check_events (void)
 242 {
 243   /* do nothing */
 244 }
 245
 246 static int
 247 query_format (uint32_t format)
 248 {
 249   if (format != IMGFMT_MPEGPES)
 250     return 0;
 251
 252   return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_TIMER;
 253 }
 254
 255 static int
 256 control (uint32_t request, void *data)
 257 {
 258   switch (request)
 259   {
 260   case VOCTRL_QUERY_FORMAT:
 261     return query_format (*((uint32_t*) data));
 262   }
 263
 264   return VO_NOTIMPL;
 265 }