mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-30 21:51:09 +00:00
5e9b6aab3b
Original commit message from CVS: paranoia cleanups and a sync fix
525 lines
16 KiB
C
525 lines
16 KiB
C
/* GStreamer
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*
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* v4lmjpegsink_calls.c: functions for hardware MJPEG video sink
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*
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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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GST_DEBUG_CATEGORY_EXTERN (v4lmjpegsink_debug);
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#define GST_CAT_DEFAULT v4lmjpegsink_debug
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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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GST_DEBUG_OBJECT (v4lmjpegsink, "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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g_mutex_lock (v4lmjpegsink->mutex_queued_frames);
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if (!v4lmjpegsink->isqueued_queued_frames[frame]) {
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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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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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GST_DEBUG_OBJECT (v4lmjpegsink, "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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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, SYNC, (NULL),
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("Failed to sync on frame %d: %s", 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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} else {
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/* be sure that we're not confusing */
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if (frame != v4lmjpegsink->bsync.frame) {
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GST_ELEMENT_ERROR (v4lmjpegsink, CORE, TOO_LAZY, (NULL),
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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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GST_DEBUG_OBJECT (v4lmjpegsink, "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, gint num)
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{
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GST_DEBUG_OBJECT (v4lmjpegsink, "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,
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&num) < 0) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, WRITE, (NULL),
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("Failed to queue frame %d: %s", 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, gint * num)
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{
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GST_DEBUG_OBJECT (v4lmjpegsink, "syncing on next frame");
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/* calculate next frame */
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v4lmjpegsink->current_frame =
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(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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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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g_mutex_unlock (v4lmjpegsink->mutex_queued_frames);
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return FALSE;
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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, gint bufsize)
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{
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GST_DEBUG_OBJECT (v4lmjpegsink,
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"setting buffer info to numbufs = %d, bufsize = %d KB", 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, gint x_offset, gint y_offset, gint norm, 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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GST_DEBUG_OBJECT (v4lmjpegsink,
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"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,
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&bparm) < 0) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, SETTINGS, (NULL),
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GST_ERROR_SYSTEM);
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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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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, TOO_LAZY, (NULL),
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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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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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} else
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#endif
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{
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if (height > mh / 2) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, TOO_LAZY, (NULL),
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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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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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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,
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&bparm) < 0) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, SETTINGS, (NULL),
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GST_ERROR_SYSTEM);
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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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GST_DEBUG_OBJECT (v4lmjpegsink, "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,
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&(v4lmjpegsink->breq)) < 0) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
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return FALSE;
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}
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GST_INFO_OBJECT (v4lmjpegsink, "Got %ld buffers of size %ld KB",
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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,
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GST_V4LELEMENT (v4lmjpegsink)->video_fd, 0);
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if (GST_V4LELEMENT (v4lmjpegsink)->buffer == MAP_FAILED) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, TOO_LAZY, (NULL),
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("Error mapping video buffers: %s", 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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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, TOO_LAZY, (NULL),
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("Failed to create queue tracker: %s", 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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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, TOO_LAZY, (NULL),
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("Failed to create queue condition holders: %s", 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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GST_DEBUG_OBJECT (v4lmjpegsink, "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 =
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g_thread_create (gst_v4lmjpegsink_sync_thread, (void *) v4lmjpegsink,
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TRUE, &error);
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if (!v4lmjpegsink->thread_queued_frames) {
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GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, TOO_LAZY, (NULL),
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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, gint num)
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{
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/*GST_DEBUG_OBJECT (v4lmjpegsink, 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 +
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(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, gint num)
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{
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GST_DEBUG_OBJECT (v4lmjpegsink, "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)
|
|
{
|
|
GST_DEBUG_OBJECT (v4lmjpegsink,
|
|
"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;
|
|
|
|
GST_DEBUG_OBJECT (v4lmjpegsink, "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;
|
|
|
|
GST_DEBUG_OBJECT (v4lmjpegsink, "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;
|
|
}
|