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558 lines
16 KiB
C
558 lines
16 KiB
C
/* G-Streamer hardware MJPEG video sink 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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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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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 "v4lmjpegsink_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_OBJECT (\
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GST_ELEMENT(v4lmjpegsink), \
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"V4LMJPEGSINK: " format, ##args)
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/******************************************************
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* gst_v4lmjpegsink_sync_thread()
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* thread keeps track of played frames
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******************************************************/
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static void *
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gst_v4lmjpegsink_sync_thread (void *arg)
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{
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GstV4lMjpegSink *v4lmjpegsink = GST_V4LMJPEGSINK(arg);
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gint frame = 0; /* frame that we're currently syncing on */
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DEBUG("starting sync thread");
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#if 0
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/* Allow easy shutting down by other processes... */
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pthread_setcancelstate( PTHREAD_CANCEL_ENABLE, NULL );
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pthread_setcanceltype( PTHREAD_CANCEL_ASYNCHRONOUS, NULL );
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#endif
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while (1)
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{
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g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
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if (!v4lmjpegsink->isqueued_queued_frames[frame])
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{
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g_cond_wait(v4lmjpegsink->cond_queued_frames[frame],
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v4lmjpegsink->mutex_queued_frames);
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}
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if (v4lmjpegsink->isqueued_queued_frames[frame] != 1)
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{
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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goto end;
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}
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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DEBUG("thread-syncing on next frame");
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if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_SYNC,
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&(v4lmjpegsink->bsync)) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Failed to sync on frame %d: %s",
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frame, g_strerror(errno));
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g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
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v4lmjpegsink->isqueued_queued_frames[frame] = -1;
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g_cond_broadcast(v4lmjpegsink->cond_queued_frames[frame]);
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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goto end;
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}
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else
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{
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/* be sure that we're not confusing */
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if (frame != v4lmjpegsink->bsync.frame)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Internal error: frame number confusion");
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goto end;
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}
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g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
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v4lmjpegsink->isqueued_queued_frames[frame] = 0;
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g_cond_broadcast(v4lmjpegsink->cond_queued_frames[frame]);
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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}
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frame = (frame+1)%v4lmjpegsink->breq.count;
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}
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end:
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DEBUG("Sync thread got signalled to exit");
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g_thread_exit(NULL);
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return NULL;
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}
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/******************************************************
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* gst_v4lmjpegsink_queue_frame()
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* queue a frame for playback
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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_v4lmjpegsink_queue_frame (GstV4lMjpegSink *v4lmjpegsink,
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gint num)
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{
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DEBUG("queueing frame %d", num);
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/* queue on this frame */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_QBUF_PLAY, &num) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Failed to queue frame %d: %s",
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num, g_strerror(errno));
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return FALSE;
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}
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g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
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v4lmjpegsink->isqueued_queued_frames[num] = 1;
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g_cond_broadcast(v4lmjpegsink->cond_queued_frames[num]);
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsink_sync_frame()
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* wait for a frame to be finished playing
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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_v4lmjpegsink_sync_frame (GstV4lMjpegSink *v4lmjpegsink,
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gint *num)
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{
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DEBUG("syncing on next frame");
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/* calculate next frame */
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v4lmjpegsink->current_frame = (v4lmjpegsink->current_frame+1)%v4lmjpegsink->breq.count;
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*num = v4lmjpegsink->current_frame;
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g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
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if (v4lmjpegsink->isqueued_queued_frames[*num] == 1)
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{
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g_cond_wait(v4lmjpegsink->cond_queued_frames[*num],
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v4lmjpegsink->mutex_queued_frames);
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}
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if (v4lmjpegsink->isqueued_queued_frames[*num] != 0)
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{
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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return FALSE;
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}
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else
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g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsink_set_buffer()
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* set buffer options
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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_v4lmjpegsink_set_buffer (GstV4lMjpegSink *v4lmjpegsink,
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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(v4lmjpegsink));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
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v4lmjpegsink->breq.size = bufsize * 1024;
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v4lmjpegsink->breq.count = numbufs;
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsink_set_playback()
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* set playback options (video, interlacing, etc.)
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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_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
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gint width,
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gint height,
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gint x_offset,
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gint y_offset,
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gint norm,
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gint interlacing)
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{
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gint mw, mh;
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struct mjpeg_params bparm;
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DEBUG("setting size = %dx%d, X/Y-offsets = %d/%d, norm = %d, interlacing = %d\n",
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width, height, x_offset, y_offset, norm, interlacing);
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
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/*GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsink)); */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Error getting playback parameters: %s",
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g_strerror(errno));
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return FALSE;
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}
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bparm.input = 0;
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bparm.norm = norm;
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bparm.decimation = 0; /* we'll set proper values later on */
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/* maxwidth is broken on marvel cards */
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mw = GST_V4LELEMENT(v4lmjpegsink)->vcap.maxwidth;
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if (mw != 768 && mw != 640)
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mw = 720;
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mh = (norm==VIDEO_MODE_NTSC?480:576);
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if (width > mw || height > mh)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Video dimensions (%dx%d) are larger than device max (%dx%d)",
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width, height, mw, mh);
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return FALSE;
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}
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if (width <= mw/4)
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bparm.HorDcm = 4;
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else if (width <= mw/2)
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bparm.HorDcm = 2;
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else
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bparm.HorDcm = 1;
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/* TODO: add proper interlacing handling */
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#if 0
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if (interlacing != INTERLACING_NOT_INTERLACED)
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{
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bparm.field_per_buff = 2;
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bparm.TmpDcm = 1;
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if (height <= mh/2)
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bparm.VerDcm = 2;
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else
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bparm.VerDcm = 1;
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}
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else
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#endif
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{
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if (height > mh/2)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Video dimensions (%dx%d) too large for non-interlaced playback (%dx%d)",
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width, height, mw, mh/2);
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return FALSE;
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}
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bparm.field_per_buff = 1;
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bparm.TmpDcm = 2;
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if (height <= mh/4)
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bparm.VerDcm = 2;
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else
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bparm.VerDcm = 1;
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}
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/* TODO: add proper interlacing handling */
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#if 0
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bparm.odd_even = (interlacing==INTERLACING_TOP_FIRST);
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#endif
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bparm.quality = 100;
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bparm.img_width = bparm.HorDcm * width;
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bparm.img_height = bparm.VerDcm * height/bparm.field_per_buff;
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/* image X/Y offset on device */
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if (x_offset < 0)
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bparm.img_x = (mw - bparm.img_width)/2;
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else
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{
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if (x_offset + bparm.img_width > mw)
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bparm.img_x = mw - bparm.img_width;
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else
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bparm.img_x = x_offset;
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}
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if (y_offset < 0)
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bparm.img_y = (mh/2 - bparm.img_height)/2;
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else
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{
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if (y_offset + bparm.img_height*2 > mh)
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bparm.img_y = mh/2 - bparm.img_height;
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else
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bparm.img_y = y_offset/2;
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}
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if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Error setting playback 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_v4lmjpegsink_playback_init()
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* initialize playback system, set up buffer, etc.
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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_v4lmjpegsink_playback_init (GstV4lMjpegSink *v4lmjpegsink)
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{
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gint n;
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DEBUG("initting playback subsystem");
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
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GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
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/* Request buffers */
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if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_REQBUFS, &(v4lmjpegsink->breq)) < 0)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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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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v4lmjpegsink->breq.count, v4lmjpegsink->breq.size/1024);
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/* Map the buffers */
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GST_V4LELEMENT(v4lmjpegsink)->buffer = mmap(0,
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v4lmjpegsink->breq.count * v4lmjpegsink->breq.size,
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PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4LELEMENT(v4lmjpegsink)->video_fd, 0);
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if (GST_V4LELEMENT(v4lmjpegsink)->buffer == MAP_FAILED)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Error mapping video buffers: %s",
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g_strerror(errno));
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GST_V4LELEMENT(v4lmjpegsink)->buffer = NULL;
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return FALSE;
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}
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/* allocate/init the GThread thingies */
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v4lmjpegsink->mutex_queued_frames = g_mutex_new();
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v4lmjpegsink->isqueued_queued_frames = (gint8 *)
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malloc(sizeof(gint8) * v4lmjpegsink->breq.count);
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if (!v4lmjpegsink->isqueued_queued_frames)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Failed to create queue tracker: %s",
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g_strerror(errno));
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return FALSE;
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}
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v4lmjpegsink->cond_queued_frames = (GCond **)
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malloc(sizeof(GCond *) * v4lmjpegsink->breq.count);
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if (!v4lmjpegsink->cond_queued_frames)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Failed to create queue condition holders: %s",
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g_strerror(errno));
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return FALSE;
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}
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for (n=0;n<v4lmjpegsink->breq.count;n++)
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v4lmjpegsink->cond_queued_frames[n] = g_cond_new();
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return TRUE;
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}
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/******************************************************
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* gst_v4lmjpegsink_playback_start()
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* start playback 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_v4lmjpegsink_playback_start (GstV4lMjpegSink *v4lmjpegsink)
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{
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GError *error;
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gint n;
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DEBUG("starting playback");
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
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GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
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/* mark all buffers as unqueued */
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for (n=0;n<v4lmjpegsink->breq.count;n++)
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v4lmjpegsink->isqueued_queued_frames[n] = 0;
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v4lmjpegsink->current_frame = -1;
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/* create sync() thread */
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v4lmjpegsink->thread_queued_frames = g_thread_create(
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gst_v4lmjpegsink_sync_thread, (void *) v4lmjpegsink, TRUE, &error);
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if(!v4lmjpegsink->thread_queued_frames)
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{
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gst_element_error(GST_ELEMENT(v4lmjpegsink),
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"Failed to create sync thread: %s", error->message);
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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_v4lmjpegsink_get_buffer()
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* get address of a buffer
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* return value: buffer's address or NULL
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******************************************************/
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guint8 *
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gst_v4lmjpegsink_get_buffer (GstV4lMjpegSink *v4lmjpegsink,
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gint num)
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{
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/*DEBUG("gst_v4lmjpegsink_get_buffer(), num = %d", num);*/
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if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsink)) ||
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!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsink)))
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return NULL;
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if (num < 0 || num >= v4lmjpegsink->breq.count)
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return NULL;
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return GST_V4LELEMENT(v4lmjpegsink)->buffer+(v4lmjpegsink->breq.size*num);
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}
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/******************************************************
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* gst_v4lmjpegsink_play_frame()
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* queue a new buffer
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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_v4lmjpegsink_play_frame (GstV4lMjpegSink *v4lmjpegsink,
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gint num)
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{
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DEBUG("playing frame %d", num);
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
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GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
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|
|
|
if (!gst_v4lmjpegsink_queue_frame(v4lmjpegsink, num))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsink_wait_frame()
|
|
* wait for buffer to be actually played
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
gboolean
|
|
gst_v4lmjpegsink_wait_frame (GstV4lMjpegSink *v4lmjpegsink,
|
|
gint *num)
|
|
{
|
|
DEBUG("waiting for next frame to be finished playing");
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
|
|
|
|
if (!gst_v4lmjpegsink_sync_frame(v4lmjpegsink, num))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsink_playback_stop()
|
|
* stop playback system and sync on remaining frames
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
gboolean
|
|
gst_v4lmjpegsink_playback_stop (GstV4lMjpegSink *v4lmjpegsink)
|
|
{
|
|
gint num;
|
|
|
|
DEBUG("stopping playback");
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
|
|
|
|
/* mark next buffer as wrong */
|
|
if (!gst_v4lmjpegsink_sync_frame(v4lmjpegsink, &num) ||
|
|
!gst_v4lmjpegsink_queue_frame(v4lmjpegsink, num))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* .. and wait for all buffers to be queued on */
|
|
g_thread_join(v4lmjpegsink->thread_queued_frames);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
* gst_v4lmjpegsink_playback_deinit()
|
|
* deinitialize the playback system and unmap buffer
|
|
* return value: TRUE on success, FALSE on error
|
|
******************************************************/
|
|
|
|
gboolean
|
|
gst_v4lmjpegsink_playback_deinit (GstV4lMjpegSink *v4lmjpegsink)
|
|
{
|
|
int n;
|
|
|
|
DEBUG("quitting playback subsystem");
|
|
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
|
|
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
|
|
|
|
/* free GThread thingies */
|
|
g_mutex_free(v4lmjpegsink->mutex_queued_frames);
|
|
for (n=0;n<v4lmjpegsink->breq.count;n++)
|
|
g_cond_free(v4lmjpegsink->cond_queued_frames[n]);
|
|
free(v4lmjpegsink->cond_queued_frames);
|
|
free(v4lmjpegsink->isqueued_queued_frames);
|
|
|
|
/* unmap the buffer */
|
|
munmap(GST_V4LELEMENT(v4lmjpegsink)->buffer, v4lmjpegsink->breq.size * v4lmjpegsink->breq.count);
|
|
GST_V4LELEMENT(v4lmjpegsink)->buffer = NULL;
|
|
|
|
return TRUE;
|
|
}
|