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

configure

@@ -358,6 +358,7 @@ Video output:
   --enable-dxr2            enable DXR2 video output [autodetect]
   --enable-dxr3            enable DXR3/H+ video output [autodetect]
   --enable-ivtv            enable IVTV TV-Out video output [autodetect]
+  --enable-v4l2            enable V4L2 Decoder audio/video output [autodetect]
   --enable-dvb             enable DVB video output [autodetect]
   --enable-dvbhead         enable DVB video output (HEAD version) [autodetect]
   --enable-mga             enable mga_vid video output [disable]
@@ -539,6 +540,7 @@ _dvbhead=auto
 _dxr2=auto
 _dxr3=auto
 _ivtv=auto
+_v4l2=auto
 _iconv=auto
 _langinfo=auto
 _rtc=auto
@@ -846,6 +848,8 @@ for ac_option do
   --disable-dxr3)	_dxr3=no	;;
   --enable-ivtv)        _ivtv=yes       ;;
   --disable-ivtv)       _ivtv=no        ;;
+  --enable-v4l2)        _v4l2=yes       ;;
+  --disable-v4l2)       _v4l2=no        ;;
   --enable-iconv)	_iconv=yes	;;
   --disable-iconv)	_iconv=no	;;
   --enable-langinfo)	_langinfo=yes	;;
@@ -4823,6 +4827,39 @@ fi
 echores "$_ivtv"
 
 
+echocheck "V4L2 MPEG Decoder"
+if test "$_v4l2" = auto ; then
+  cat > $TMPC << EOF
+#include <stdlib.h>
+#include <inttypes.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/version.h>
+int main(void) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
+  return 0;
+#else
+  return -1;
+#endif
+}
+EOF
+  _v4l2=no
+  cc_check && _v4l2=yes
+fi
+if test "$_v4l2" = yes ; then
+  _def_v4l2='#define HAVE_V4L2_DECODER 1'
+  _vosrc="$_vosrc vo_v4l2.c"
+  _vomodules="v4l2 $_vomodules"
+  _aosrc="$_aosrc ao_v4l2.c"
+  _aomodules="v4l2 $_aomodules"
+else
+  _def_v4l2='#undef HAVE_V4L2_DECODER'
+  _novomodules="v4l2 $_novomodules"
+  _noaomodules="v4l2 $_noaomodules"
+fi
+echores "$_v4l2"
+
+
 
 #########
 # AUDIO #
@@ -8241,6 +8278,7 @@ $_def_fbdev
 $_def_dxr2
 $_def_dxr3
 $_def_ivtv
+$_def_v4l2
 $_def_dvb
 $_def_dvb_in
 $_def_svga

etc/codecs.conf

@@ -35,7 +35,7 @@ videocodec zmbv
 ; Note: mpegpes is preferred for hw decoders:
 
 videocodec mpegpes
-  info "MPEG-PES output (.mpg or DXR3/IVTV/DVB card)"
+  info "MPEG-PES output (.mpg or DXR3/IVTV/DVB/V4L2 card)"
   comment "for hardware decoding"
   status working
   format 0x10000001  ; mpeg 1

libao2/ao_v4l2.c

@@ -0,0 +1,159 @@
+/*
+ *  Copyright (C) 2007 Benjamin Zores
+ *   Audio 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
+ *
+ *  WARNING: you need to force -ac hwmpa for audio output to work.
+ */
+
+#include <inttypes.h>
+
+#include "config.h"
+
+#include "mp_msg.h"
+#include "help_mp.h"
+
+#include "audio_out.h"
+#include "audio_out_internal.h"
+#include "libaf/af_format.h"
+#include "libmpdemux/mpeg_packetizer.h"
+
+#define MPEG_AUDIO_ID 0x1C0
+
+static int freq = 0;
+
+static ao_info_t info = 
+{
+  "V4L2 MPEG Audio Decoder output",
+  "v4l2",
+  "Benjamin Zores",
+  ""
+};
+
+LIBAO_EXTERN (v4l2)
+
+/* to set/get/query special features/parameters */
+static int
+control (int cmd,void *arg)
+{
+  return CONTROL_UNKNOWN;
+}
+
+/* open & setup audio device */
+static int
+init (int rate, int channels, int format, int flags)
+{
+  extern int v4l2_fd;
+
+  if (v4l2_fd < 0)
+    return 0;
+
+  if (format != AF_FORMAT_MPEG2)
+  {
+    mp_msg (MSGT_AO, MSGL_FATAL,
+            "AO: [v4l2] can only handle MPEG audio streams.\n");
+    return 0;
+  }
+  
+  ao_data.outburst = 2048;
+  ao_data.samplerate = rate;
+  ao_data.channels = channels;
+  ao_data.format = AF_FORMAT_MPEG2;
+  ao_data.buffersize = 2048;
+  ao_data.bps = rate * 2 * 2;
+  ao_data.pts = 0;
+  freq = rate;
+
+  /* check for supported audio rate */
+  if (rate != 32000 || rate != 41000 || rate != 48000)
+  {
+    mp_msg (MSGT_AO, MSGL_ERR, MSGTR_AO_MPEGPES_UnsupSamplerate, rate);
+    rate = 48000;
+  }
+
+  return 1;
+}
+
+/* close audio device */
+static void
+uninit (int immed)
+{
+  /* nothing to do */
+}
+
+/* stop playing and empty buffers (for seeking/pause) */
+static void
+reset (void)
+{
+  /* nothing to do */
+}
+
+/* stop playing, keep buffers (for pause) */
+static void
+audio_pause (void)
+{
+  reset ();
+}
+
+/* resume playing, after audio_pause() */
+static void
+audio_resume (void)
+{
+  /* nothing to do */
+}
+
+/* how many bytes can be played without blocking */
+static int
+get_space (void)
+{
+  extern int vo_pts;
+  float x;
+  int y;
+
+  x = (float) (vo_pts - ao_data.pts) / 90000.0;
+  if (x <= 0)
+    return 0;
+  
+  y  = freq * 4 * x;
+  y /= ao_data.outburst;
+  y *= ao_data.outburst;
+  
+  if (y > 32000)
+    y = 32000;
+
+  return y;
+}
+
+/* number of bytes played */
+static int
+play (void *data, int len, int flags)
+{
+  extern int v4l2_write (unsigned char *data, int len);
+  
+  if (ao_data.format != AF_FORMAT_MPEG2)
+    return 0;
+
+  send_mpeg_pes_packet (data, len, MPEG_AUDIO_ID, ao_data.pts, 2, v4l2_write);
+
+  return len;
+}
+
+/* delay in seconds between first and last sample in buffer */
+static float
+get_delay (void)
+{
+  return 0.0;
+}

libao2/audio_out.c

@@ -68,6 +68,9 @@ extern ao_functions_t audio_out_dxr2;
 #ifdef HAVE_IVTV
 extern ao_functions_t audio_out_ivtv;
 #endif
+#ifdef HAVE_V4L2_DECODER
+extern ao_functions_t audio_out_v4l2;
+#endif
 extern ao_functions_t audio_out_mpegpes;
 extern ao_functions_t audio_out_pcm;
 extern ao_functions_t audio_out_pss;
@@ -130,6 +133,9 @@ ao_functions_t* audio_out_drivers[] =
 #endif
 #ifdef HAVE_IVTV
         &audio_out_ivtv,
+#endif
+#ifdef HAVE_V4L2_DECODER
+        &audio_out_v4l2,
 #endif
         &audio_out_null,
 // should not be auto-selected:

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,

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;
+}