libvo/vo_ivtv.c

   1 /*
   2  *  Copyright (C) 2006 Benjamin Zores
   3  *   Video output for WinTV PVR-150/250/350 (a.k.a IVTV) cards.
   4  *   TV-Out through hardware MPEG decoder.
   5  *   Based on some old code from ivtv driver authors.
   6  *   See http://ivtvdriver.org/index.php/Main_Page for more details on the
   7  *    cards supported by the ivtv driver.
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software Foundation,
  21  *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include "config.h"
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <errno.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <sys/ioctl.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35 #include <stdlib.h>
  36 #include <inttypes.h>
  37 #include <linux/types.h>
  38 #include <linux/videodev2.h>
  39 #include <linux/ivtv.h>
  40 #include <linux/ioctl.h>
  41
  42 #include "mp_msg.h"
  43 #include "subopt-helper.h"
  44 #include "video_out.h"
  45 #include "video_out_internal.h"
  46 #include "libmpdemux/mpeg_packetizer.h"
  47
  48 #define DEFAULT_MPEG_DECODER "/dev/video16"
  49 #define IVTV_VO_HDR "VO: [ivtv]"
  50
  51 /* ivtv private */
  52 int ivtv_fd = -1;
  53 static vo_mpegpes_t *pes;
  54
  55 /* suboptions */
  56 static int output = -1;
  57 static char *device = NULL;
  58
  59 static opt_t subopts[] = {
  60   {"output",   OPT_ARG_INT,       &output,       (opt_test_f)int_non_neg},
  61   {"device",   OPT_ARG_MSTRZ,     &device,       NULL},
  62   {NULL}
  63 };
  64
  65 static vo_info_t info =
  66 {
  67   "IVTV MPEG Video Decoder TV-Out",
  68   "ivtv",
  69   "Benjamin Zores",
  70   ""
  71 };
  72 LIBVO_EXTERN (ivtv)
  73
  74 /* ivtv internals */
  75
  76 static uint32_t
  77 ivtv_reset (int blank_screen)
  78 {
  79   struct ivtv_cfg_stop_decode sd;
  80   struct ivtv_cfg_start_decode sd1;
  81   int flags = 0;
  82
  83   if (blank_screen)
  84     flags |= IVTV_STOP_FL_HIDE_FRAME;
  85   sd.flags = flags;
  86
  87   if (ioctl (ivtv_fd, IVTV_IOC_STOP_DECODE, &sd) < 0)
  88   {
  89     mp_msg (MSGT_VO, MSGL_ERR,
  90             "IVTV_IOC_STOP_DECODE: %s\n", strerror (errno));
  91     return 1;
  92   }
  93
  94   sd1.gop_offset = 0;
  95   sd1.muted_audio_frames = 0;
  96
  97   if (ioctl (ivtv_fd, IVTV_IOC_START_DECODE, &sd1) < 0)
  98   {
  99     mp_msg (MSGT_VO, MSGL_ERR,
 100             "IVTV_IOC_START_DECODE: %s\n", strerror (errno));
 101     return 1;
 102   }
 103
 104   return 0;
 105 }
 106
 107 int
 108 ivtv_write (unsigned char *data, int len)
 109 {
 110   if (ivtv_fd < 0)
 111     return 0;
 112
 113   return write (ivtv_fd, data, len);
 114 }
 115
 116 /* video out functions */
 117
 118 static int
 119 config (uint32_t width, uint32_t height,
 120         uint32_t d_width, uint32_t d_height,
 121         uint32_t fullscreen, char *title, uint32_t format)
 122 {
 123   return 0;
 124 }
 125
 126 static int
 127 preinit (const char *arg)
 128 {
 129   struct v4l2_output vout;
 130   int err;
 131
 132   if (subopt_parse (arg, subopts) != 0)
 133   {
 134     mp_msg (MSGT_VO, MSGL_FATAL,
 135             "\n-vo ivtv command line help:\n"
 136             "Example: mplayer -vo ivtv:device=/dev/video16:output=2\n"
 137             "\nOptions:\n"
 138             "  device=/dev/videoX\n"
 139             "    Name of the MPEG decoder device file.\n"
 140             "  output=<0-...>\n"
 141             "    V4L2 id of the TV output.\n"
 142             "\n" );
 143     return -1;
 144   }
 145
 146   if (!device)
 147     device = strdup (DEFAULT_MPEG_DECODER);
 148
 149   ivtv_fd = open (device, O_RDWR);
 150   if (ivtv_fd < 0)
 151   {
 152     free (device);
 153     mp_msg (MSGT_VO, MSGL_FATAL, "%s %s\n", IVTV_VO_HDR, strerror (errno));
 154     return -1;
 155   }
 156
 157   /* list available outputs */
 158   vout.index = 0;
 159   err = 1;
 160   mp_msg (MSGT_VO, MSGL_INFO, "%s Available video outputs: ", IVTV_VO_HDR);
 161   while (ioctl (ivtv_fd, VIDIOC_ENUMOUTPUT, &vout) >= 0)
 162   {
 163     err = 0;
 164     mp_msg (MSGT_VO, MSGL_INFO, "'#%d, %s' ", vout.index, vout.name);
 165     vout.index++;
 166   }
 167   if (err)
 168   {
 169     mp_msg (MSGT_VO, MSGL_INFO, "none\n");
 170     free (device);
 171     return -1;
 172   }
 173   else
 174     mp_msg (MSGT_VO, MSGL_INFO, "\n");
 175
 176   /* set user specified output */
 177   if (output != -1)
 178   {
 179     if (ioctl (ivtv_fd, VIDIOC_S_OUTPUT, &output) < 0)
 180     {
 181       mp_msg (MSGT_VO, MSGL_ERR,
 182               "%s can't set output (%s)\n", IVTV_VO_HDR, strerror (errno));
 183       free (device);
 184       return -1;
 185     }
 186   }
 187
 188   /* display device name */
 189   mp_msg (MSGT_VO, MSGL_INFO, "%s using %s\n", IVTV_VO_HDR, device);
 190   free (device);
 191
 192   /* display current video output */
 193   if (ioctl (ivtv_fd, VIDIOC_G_OUTPUT, &output) == 0)
 194   {
 195     vout.index = output;
 196     if (ioctl (ivtv_fd, VIDIOC_ENUMOUTPUT, &vout) < 0)
 197     {
 198       mp_msg (MSGT_VO, MSGL_ERR,
 199               "%s can't get output (%s).\n", IVTV_VO_HDR, strerror (errno));
 200       return -1;
 201     }
 202     else
 203       mp_msg (MSGT_VO, MSGL_INFO,
 204               "%s video output: %s\n", IVTV_VO_HDR, vout.name);
 205   }
 206   else
 207   {
 208     mp_msg (MSGT_VO, MSGL_ERR,
 209             "%s can't get output (%s).\n", IVTV_VO_HDR, strerror (errno));
 210     return -1;
 211   }
 212
 213   /* clear output */
 214   ivtv_reset (1);
 215
 216   return 0;
 217 }
 218
 219 static void
 220 draw_osd (void)
 221 {
 222   /* do nothing */
 223 }
 224
 225 static int
 226 draw_frame (uint8_t * src[])
 227 {
 228   pes = (vo_mpegpes_t *) src[0];
 229   return 0;
 230 }
 231
 232 static void
 233 flip_page (void)
 234 {
 235   if (ivtv_fd < 0)
 236     return;
 237
 238   if (!pes)
 239     return;
 240
 241   send_mpeg_pes_packet (pes->data, pes->size, pes->id,
 242                          pes->timestamp ? pes->timestamp : vo_pts, 2,
 243                          ivtv_write);
 244
 245   /* ensure flip_page() won't be called twice */
 246   pes = NULL;
 247 }
 248
 249 static int
 250 draw_slice (uint8_t *image[], int stride[], int w, int h, int x, int y)
 251 {
 252   return 0;
 253 }
 254
 255 static void
 256 uninit (void)
 257 {
 258   if (ivtv_fd < 0)
 259     return;
 260
 261   /* clear output */
 262   ivtv_reset (1);
 263
 264   /* close device */
 265   close (ivtv_fd);
 266   ivtv_fd = -1;
 267 }
 268
 269 static void
 270 check_events (void)
 271 {
 272   /* do nothing */
 273 }
 274
 275 static int
 276 query_format (uint32_t format)
 277 {
 278   if (format != IMGFMT_MPEGPES)
 279     return 0;
 280
 281   return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_TIMER;
 282 }
 283
 284 static int
 285 control (uint32_t request, void *data, ...)
 286 {
 287   switch (request)
 288   {
 289   case VOCTRL_PAUSE:
 290   case VOCTRL_RESUME:
 291     return ivtv_reset (0);
 292
 293   case VOCTRL_RESET:
 294     return ivtv_reset (1);
 295
 296   case VOCTRL_QUERY_FORMAT:
 297     return query_format (*((uint32_t*) data));
 298   }
 299
 300   return VO_NOTIMPL;
 301 }