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574 lines
16 KiB
C
574 lines
16 KiB
C
/* G-Streamer hardware MJPEG video source plugin
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <errno.h>
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#include "v4lmjpegsrc_calls.h"
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/* On some systems MAP_FAILED seems to be missing */
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#ifndef MAP_FAILED
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#define MAP_FAILED ( (caddr_t) -1 )
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#endif
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#define DEBUG(format, args...) \
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GST_DEBUG_ELEMENT(GST_CAT_PLUGIN_INFO, \
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GST_ELEMENT(v4lmjpegsrc), \
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"V4LMJPEGSRC: " format, ##args)
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char *input_name[] = { "Composite", "S-Video", "TV-Tuner", "Autodetect" };
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/******************************************************
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* gst_v4lmjpegsrc_queue_frame():
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* queue a frame for capturing
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* return value: TRUE on success, FALSE on error
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******************************************************/
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static gboolean
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gst_v4lmjpegsrc_queue_frame (GstV4lMjpegSrc *v4lmjpegsrc,
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gint num)
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{
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DEBUG("queueing frame %d", num);
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_QBUF_CAPT, &num) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error queueing a buffer (%d): %s",
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num, g_strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_sync_next_frame():
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* sync on the next frame for capturing
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* return value: TRUE on success, FALSE on error
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******************************************************/
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static gboolean
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gst_v4lmjpegsrc_sync_next_frame (GstV4lMjpegSrc *v4lmjpegsrc,
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gint *num)
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{
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DEBUG("syncing on next frame");
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_SYNC, &(v4lmjpegsrc->bsync)) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error syncing on a buffer (%ld): %s",
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v4lmjpegsrc->bsync.frame, g_strerror(errno));
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return FALSE;
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}
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*num = v4lmjpegsrc->bsync.frame;
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_set_input_norm():
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* set input/norm (includes autodetection), norm is
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* VIDEO_MODE_{PAL|NTSC|SECAM|AUTO}
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean
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gst_v4lmjpegsrc_set_input_norm (GstV4lMjpegSrc *v4lmjpegsrc,
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GstV4lMjpegInputType input,
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gint norm)
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{
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struct mjpeg_status bstat;
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DEBUG("setting input = %d (%s), norm = %d (%s)",
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input, input_name[input], norm, norm_name[norm]);
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
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if (input == V4L_MJPEG_INPUT_AUTO)
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{
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int n;
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for (n=V4L_MJPEG_INPUT_COMPOSITE;n<V4L_MJPEG_INPUT_AUTO;n++)
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{
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gst_info("Trying %s as input...\n",
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input_name[n]);
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bstat.input = n;
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_STATUS, &bstat) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error getting device status: %s",
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g_strerror(errno));
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return FALSE;
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}
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if (bstat.signal)
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{
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input = bstat.input;
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if (norm == VIDEO_MODE_AUTO)
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norm = bstat.norm;
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gst_info("Signal found: on input %s, norm %s\n",
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input_name[bstat.input], norm_name[bstat.norm]);
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break;
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}
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}
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/* check */
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if (input == V4L_MJPEG_INPUT_AUTO || norm == VIDEO_MODE_AUTO)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Unable to auto-detect an input");
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return FALSE;
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}
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/* save */
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GST_V4LELEMENT(v4lmjpegsrc)->channel = input;
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GST_V4LELEMENT(v4lmjpegsrc)->norm = norm;
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}
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else if (norm == VIDEO_MODE_AUTO && input)
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{
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bstat.input = input;
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_STATUS, &bstat) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error getting device status: %s",
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g_strerror(errno));
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return FALSE;
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}
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if (bstat.signal)
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{
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norm = bstat.norm;
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gst_info("Norm %s detected on input %s\n",
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norm_name[bstat.norm], input_name[input]);
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GST_V4LELEMENT(v4lmjpegsrc)->norm = norm;
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}
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else
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"No signal found on input %s",
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input_name[input]);
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return FALSE;
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}
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}
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return gst_v4l_set_chan_norm(GST_V4LELEMENT(v4lmjpegsrc), input, norm);
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}
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/******************************************************
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* gst_v4lmjpegsrc_set_buffer():
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* set buffer parameters (size/count)
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean
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gst_v4lmjpegsrc_set_buffer (GstV4lMjpegSrc *v4lmjpegsrc,
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gint numbufs,
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gint bufsize)
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{
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DEBUG("setting buffer info to numbufs = %d, bufsize = %d KB",
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numbufs, bufsize);
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
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v4lmjpegsrc->breq.size = bufsize * 1024;
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v4lmjpegsrc->breq.count = numbufs;
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_set_capture():
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* set capture parameters (simple)
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean
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gst_v4lmjpegsrc_set_capture (GstV4lMjpegSrc *v4lmjpegsrc,
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gint decimation,
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gint quality)
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{
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int norm, input, mw;
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struct mjpeg_params bparm;
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DEBUG("setting decimation = %d, quality = %d",
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decimation, quality);
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
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gst_v4l_get_chan_norm(GST_V4LELEMENT(v4lmjpegsrc), &input, &norm);
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/* Query params for capture */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error getting video parameters: %s",
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g_strerror(errno));
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return FALSE;
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}
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bparm.decimation = decimation;
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bparm.quality = quality;
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bparm.norm = norm;
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bparm.input = input;
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bparm.APP_len = 0; /* no JPEG markers - TODO: this is definately not right for decimation==1 */
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mw = GST_V4LELEMENT(v4lmjpegsrc)->vcap.maxwidth;
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if (mw != 768 && mw != 640)
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{
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if (decimation == 1)
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mw = 720;
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else
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mw = 704;
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}
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v4lmjpegsrc->end_width = mw / decimation;
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v4lmjpegsrc->end_height = (norm==VIDEO_MODE_NTSC?480:576) / decimation;
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/* TODO: interlacing */
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/* Set params for capture */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error setting video parameters: %s",
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g_strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_set_capture_m():
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* set capture parameters (advanced)
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean gst_v4lmjpegsrc_set_capture_m (GstV4lMjpegSrc *v4lmjpegsrc,
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gint x_offset,
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gint y_offset,
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gint width,
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gint height,
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gint h_decimation,
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gint v_decimation,
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gint quality)
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{
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gint norm, input;
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gint maxwidth;
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struct mjpeg_params bparm;
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DEBUG("setting x_offset = %d, y_offset = %d, "
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"width = %d, height = %d, h_decimation = %d, v_decimation = %d, quality = %d\n",
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x_offset, y_offset, width, height, h_decimation, v_decimation, quality);
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
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gst_v4l_get_chan_norm(GST_V4LELEMENT(v4lmjpegsrc), &input, &norm);
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if (GST_V4LELEMENT(v4lmjpegsrc)->vcap.maxwidth != 768 &&
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GST_V4LELEMENT(v4lmjpegsrc)->vcap.maxwidth != 640)
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maxwidth = 720;
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else
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maxwidth = GST_V4LELEMENT(v4lmjpegsrc)->vcap.maxwidth;
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/* Query params for capture */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error getting video parameters: %s",
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g_strerror(errno));
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return FALSE;
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}
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bparm.decimation = 0;
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bparm.quality = quality;
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bparm.norm = norm;
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bparm.input = input;
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bparm.APP_len = 0; /* no JPEG markers - TODO: this is definately not right for decimation==1 */
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if (width <= 0)
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{
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if (x_offset < 0) x_offset = 0;
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width = (maxwidth==720&&h_decimation!=1)?704:maxwidth - 2*x_offset;
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}
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else
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{
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if (x_offset < 0)
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x_offset = (maxwidth - width)/2;
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}
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if (height <= 0)
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{
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if (y_offset < 0) y_offset = 0;
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height = (norm==VIDEO_MODE_NTSC)?480:576 - 2*y_offset;
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}
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else
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{
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if (y_offset < 0)
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y_offset = ((norm==VIDEO_MODE_NTSC)?480:576 - height)/2;
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}
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if (width + x_offset > maxwidth)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Image width+offset (%d) bigger than maximum (%d)",
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width + x_offset, maxwidth);
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return FALSE;
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}
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if ((width%(bparm.HorDcm*16))!=0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Image width (%d) not multiple of %d (required for JPEG)",
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width, bparm.HorDcm*16);
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return FALSE;
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}
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if (height + y_offset > (norm==VIDEO_MODE_NTSC ? 480 : 576))
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Image height+offset (%d) bigger than maximum (%d)",
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height + y_offset, (norm==VIDEO_MODE_NTSC ? 480 : 576));
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return FALSE;
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}
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/* RJ: Image height must only be a multiple of 8, but geom_height
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* is double the field height
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*/
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if ((height%(bparm.VerDcm*16))!=0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Image height (%d) not multiple of %d (required for JPEG)",
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height, bparm.VerDcm*16);
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return FALSE;
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}
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bparm.img_x = x_offset;
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bparm.img_width = width;
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bparm.img_y = y_offset;
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bparm.img_height = height;
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bparm.HorDcm = h_decimation;
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bparm.VerDcm = (v_decimation==4) ? 2 : 1;
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bparm.TmpDcm = (v_decimation==1) ? 1 : 2;
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bparm.field_per_buff = (v_decimation==1) ? 2 : 1;
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v4lmjpegsrc->end_width = width / h_decimation;
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v4lmjpegsrc->end_width = height / v_decimation;
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/* TODO: interlacing */
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/* Set params for capture */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error setting video parameters: %s",
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g_strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_capture_init():
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* initialize the capture system
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean
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gst_v4lmjpegsrc_capture_init (GstV4lMjpegSrc *v4lmjpegsrc)
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{
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DEBUG("initting capture subsystem");
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
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/* Request buffers */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsrc)->video_fd, MJPIOC_REQBUFS, &(v4lmjpegsrc->breq)) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error requesting video buffers: %s",
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g_strerror(errno));
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return FALSE;
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}
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gst_info("Got %ld buffers of size %ld KB\n",
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v4lmjpegsrc->breq.count, v4lmjpegsrc->breq.size/1024);
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/* Map the buffers */
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GST_V4LELEMENT(v4lmjpegsrc)->buffer = mmap(0,
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v4lmjpegsrc->breq.count * v4lmjpegsrc->breq.size,
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PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4LELEMENT(v4lmjpegsrc)->video_fd, 0);
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if (GST_V4LELEMENT(v4lmjpegsrc)->buffer == MAP_FAILED)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsrc),
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"Error mapping video buffers: %s",
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g_strerror(errno));
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GST_V4LELEMENT(v4lmjpegsrc)->buffer = NULL;
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return FALSE;
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}
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_capture_start():
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* start streaming capture
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean
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gst_v4lmjpegsrc_capture_start (GstV4lMjpegSrc *v4lmjpegsrc)
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{
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int n;
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DEBUG("starting capture");
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
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GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
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/* queue'ing the buffers starts streaming capture */
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for (n=0;n<v4lmjpegsrc->breq.count;n++)
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if (!gst_v4lmjpegsrc_queue_frame(v4lmjpegsrc, n))
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return FALSE;
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsrc_grab_frame():
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* grab one frame during streaming capture
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* return value: TRUE on success, FALSE on error
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******************************************************/
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gboolean
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gst_v4lmjpegsrc_grab_frame (GstV4lMjpegSrc *v4lmjpegsrc,
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gint *num,
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gint *size)
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{
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DEBUG("grabbing frame");
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
|
|
|
|
/* syncing on the buffer grabs it */
|
|
if (!gst_v4lmjpegsrc_sync_next_frame(v4lmjpegsrc, num))
|
|
return FALSE;
|
|
|
|
*size = v4lmjpegsrc->bsync.length;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsrc_get_buffer():
|
|
* get the memory address of a single buffer
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
guint8 *
|
|
gst_v4lmjpegsrc_get_buffer (GstV4lMjpegSrc *v4lmjpegsrc,
|
|
gint num)
|
|
{
|
|
DEBUG("gst_v4lmjpegsrc_get_buffer(), num = %d", num);
|
|
|
|
if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc)) ||
|
|
!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsrc)))
|
|
return NULL;
|
|
|
|
if (num < 0 || num >= v4lmjpegsrc->breq.count)
|
|
return NULL;
|
|
|
|
return GST_V4LELEMENT(v4lmjpegsrc)->buffer+(v4lmjpegsrc->breq.size*num);
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsrc_requeue_frame():
|
|
* requeue a frame for capturing
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
gboolean
|
|
gst_v4lmjpegsrc_requeue_frame (GstV4lMjpegSrc *v4lmjpegsrc,
|
|
gint num)
|
|
{
|
|
DEBUG("requeueing frame %d", num);
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
|
|
|
|
if (!gst_v4lmjpegsrc_queue_frame(v4lmjpegsrc, num))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsrc_capture_stop():
|
|
* stop streaming capture
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
gboolean
|
|
gst_v4lmjpegsrc_capture_stop (GstV4lMjpegSrc *v4lmjpegsrc)
|
|
{
|
|
DEBUG("stopping capture");
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
|
|
|
|
/* unqueue the buffers */
|
|
if (!gst_v4lmjpegsrc_queue_frame(v4lmjpegsrc, -1))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsrc_capture_deinit():
|
|
* deinitialize the capture system
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
gboolean
|
|
gst_v4lmjpegsrc_capture_deinit (GstV4lMjpegSrc *v4lmjpegsrc)
|
|
{
|
|
DEBUG("quitting capture subsystem");
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsrc));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc));
|
|
|
|
/* unmap the buffer */
|
|
munmap(GST_V4LELEMENT(v4lmjpegsrc)->buffer, v4lmjpegsrc->breq.size * v4lmjpegsrc->breq.count);
|
|
GST_V4LELEMENT(v4lmjpegsrc)->buffer = NULL;
|
|
|
|
return TRUE;
|
|
}
|