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gstreamer/sys/v4l/v4lmjpegsink_calls.c
David Schleef 048fd81203 Convert from pthreads to GThreads. Untested. BBB: feel free to revert this if it's horribly broken. 
Original commit message from CVS:
Convert from pthreads to GThreads.  Untested.  BBB: feel free to revert
this if it's horribly broken.
2002-11-02 21:29:10 +00:00

554 lines
16 KiB
C
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/* G-Streamer hardware MJPEG video sink plugin
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <string.h>
#include <errno.h>
#include "v4lmjpegsink_calls.h"
/* On some systems MAP_FAILED seems to be missing */
#ifndef MAP_FAILED
#define MAP_FAILED ( (caddr_t) -1 )
#endif
#define DEBUG(format, args...) \
GST_DEBUG_ELEMENT(GST_CAT_PLUGIN_INFO, \
GST_ELEMENT(v4lmjpegsink), \
"V4LMJPEGSINK: " format, ##args)
/******************************************************
* gst_v4lmjpegsink_sync_thread()
* thread keeps track of played frames
******************************************************/
static void *
gst_v4lmjpegsink_sync_thread (void *arg)
{
GstV4lMjpegSink *v4lmjpegsink = GST_V4LMJPEGSINK(arg);
gint frame = 0; /* frame that we're currently syncing on */
DEBUG("starting sync thread");
#if 0
/* Allow easy shutting down by other processes... */
pthread_setcancelstate( PTHREAD_CANCEL_ENABLE, NULL );
pthread_setcanceltype( PTHREAD_CANCEL_ASYNCHRONOUS, NULL );
#endif
while (1)
{
g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
if (!v4lmjpegsink->isqueued_queued_frames[frame])
{
g_cond_wait(v4lmjpegsink->cond_queued_frames[frame],
v4lmjpegsink->mutex_queued_frames);
}
if (v4lmjpegsink->isqueued_queued_frames[frame] != 1)
{
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
goto end;
}
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
DEBUG("thread-syncing on next frame");
if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_SYNC,
&(v4lmjpegsink->bsync)) < 0)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to sync on frame %d: %s",
frame, g_strerror(errno));
g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
v4lmjpegsink->isqueued_queued_frames[frame] = -1;
g_cond_broadcast(v4lmjpegsink->cond_queued_frames[frame]);
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
goto end;
}
else
{
/* be sure that we're not confusing */
if (frame != v4lmjpegsink->bsync.frame)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Internal error: frame number confusion");
goto end;
}
g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
v4lmjpegsink->isqueued_queued_frames[frame] = 0;
g_cond_broadcast(v4lmjpegsink->cond_queued_frames[frame]);
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
}
frame = (frame+1)%v4lmjpegsink->breq.count;
}
end:
DEBUG("Sync thread got signalled to exit");
g_thread_exit(NULL);
return NULL;
}
/******************************************************
* gst_v4lmjpegsink_queue_frame()
* queue a frame for playback
* return value: TRUE on success, FALSE on error
******************************************************/
static gboolean
gst_v4lmjpegsink_queue_frame (GstV4lMjpegSink *v4lmjpegsink,
gint num)
{
DEBUG("queueing frame %d", num);
/* queue on this frame */
if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_QBUF_PLAY, &num) < 0)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to queue frame %d: %s",
num, g_strerror(errno));
return FALSE;
}
g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
v4lmjpegsink->isqueued_queued_frames[num] = 1;
g_cond_broadcast(v4lmjpegsink->cond_queued_frames[num]);
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_sync_frame()
* wait for a frame to be finished playing
* return value: TRUE on success, FALSE on error
******************************************************/
static gboolean
gst_v4lmjpegsink_sync_frame (GstV4lMjpegSink *v4lmjpegsink,
gint *num)
{
DEBUG("syncing on next frame");
/* calculate next frame */
v4lmjpegsink->current_frame = (v4lmjpegsink->current_frame+1)%v4lmjpegsink->breq.count;
*num = v4lmjpegsink->current_frame;
g_mutex_lock(v4lmjpegsink->mutex_queued_frames);
if (v4lmjpegsink->isqueued_queued_frames[*num] == 1)
{
g_cond_wait(v4lmjpegsink->cond_queued_frames[*num],
v4lmjpegsink->mutex_queued_frames);
}
if (v4lmjpegsink->isqueued_queued_frames[*num] != 0)
{
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
return FALSE;
}
else
g_mutex_unlock(v4lmjpegsink->mutex_queued_frames);
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_set_buffer()
* set buffer options
* return value: TRUE on success, FALSE on error
******************************************************/
gboolean
gst_v4lmjpegsink_set_buffer (GstV4lMjpegSink *v4lmjpegsink,
gint numbufs,
gint bufsize)
{
DEBUG("setting buffer info to numbufs = %d, bufsize = %d KB",
numbufs, bufsize);
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
v4lmjpegsink->breq.size = bufsize * 1024;
v4lmjpegsink->breq.count = numbufs;
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_set_playback()
* set playback options (video, interlacing, etc.)
* return value: TRUE on success, FALSE on error
******************************************************/
gboolean
gst_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
gint width,
gint height,
gint x_offset,
gint y_offset,
gint norm,
gint interlacing)
{
gint mw, mh;
struct mjpeg_params bparm;
DEBUG("setting size = %dx%d, X/Y-offsets = %d/%d, norm = %d, interlacing = %d\n",
width, height, x_offset, y_offset, norm, interlacing);
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
/*GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsink)); */
if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_G_PARAMS, &bparm) < 0)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Error getting playback parameters: %s",
g_strerror(errno));
return FALSE;
}
bparm.input = 0;
bparm.norm = norm;
bparm.decimation = 0; /* we'll set proper values later on */
/* maxwidth is broken on marvel cards */
mw = GST_V4LELEMENT(v4lmjpegsink)->vcap.maxwidth;
if (mw != 768 && mw != 640)
mw = 720;
mh = (norm==VIDEO_MODE_NTSC?480:576);
if (width > mw || height > mh)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Video dimensions (%dx%d) are larger than device max (%dx%d)",
width, height, mw, mh);
return FALSE;
}
if (width <= mw/4)
bparm.HorDcm = 4;
else if (width <= mw/2)
bparm.HorDcm = 2;
else
bparm.HorDcm = 1;
/* TODO: add proper interlacing handling */
#if 0
if (interlacing != INTERLACING_NOT_INTERLACED)
{
bparm.field_per_buff = 2;
bparm.TmpDcm = 1;
if (height <= mh/2)
bparm.VerDcm = 2;
else
bparm.VerDcm = 1;
}
else
#endif
{
if (height > mh/2)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Video dimensions (%dx%d) too large for non-interlaced playback (%dx%d)",
width, height, mw, mh/2);
return FALSE;
}
bparm.field_per_buff = 1;
bparm.TmpDcm = 2;
if (height <= mh/4)
bparm.VerDcm = 2;
else
bparm.VerDcm = 1;
}
/* TODO: add proper interlacing handling */
#if 0
bparm.odd_even = (interlacing==INTERLACING_TOP_FIRST);
#endif
bparm.quality = 100;
bparm.img_width = bparm.HorDcm * width;
bparm.img_height = bparm.VerDcm * height/bparm.field_per_buff;
/* image X/Y offset on device */
if (x_offset < 0)
bparm.img_x = (mw - bparm.img_width)/2;
else
{
if (x_offset + bparm.img_width > mw)
bparm.img_x = mw - bparm.img_width;
else
bparm.img_x = x_offset;
}
if (y_offset < 0)
bparm.img_y = (mh/2 - bparm.img_height)/2;
else
{
if (y_offset + bparm.img_height*2 > mh)
bparm.img_y = mh/2 - bparm.img_height;
else
bparm.img_y = y_offset/2;
}
if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_S_PARAMS, &bparm) < 0)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Error setting playback parameters: %s",
g_strerror(errno));
return FALSE;
}
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_playback_init()
* initialize playback system, set up buffer, etc.
* return value: TRUE on success, FALSE on error
******************************************************/
gboolean
gst_v4lmjpegsink_playback_init (GstV4lMjpegSink *v4lmjpegsink)
{
gint n;
DEBUG("initting playback subsystem");
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
GST_V4L_CHECK_NOT_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
/* Request buffers */
if (ioctl(GST_V4LELEMENT(v4lmjpegsink)->video_fd, MJPIOC_REQBUFS, &(v4lmjpegsink->breq)) < 0)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Error requesting video buffers: %s",
g_strerror(errno));
return FALSE;
}
gst_info("Got %ld buffers of size %ld KB\n",
v4lmjpegsink->breq.count, v4lmjpegsink->breq.size/1024);
/* Map the buffers */
GST_V4LELEMENT(v4lmjpegsink)->buffer = mmap(0,
v4lmjpegsink->breq.count * v4lmjpegsink->breq.size,
PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4LELEMENT(v4lmjpegsink)->video_fd, 0);
if (GST_V4LELEMENT(v4lmjpegsink)->buffer == MAP_FAILED)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Error mapping video buffers: %s",
g_strerror(errno));
GST_V4LELEMENT(v4lmjpegsink)->buffer = NULL;
return FALSE;
}
/* allocate/init the GThread thingies */
v4lmjpegsink->mutex_queued_frames = g_mutex_new();
v4lmjpegsink->isqueued_queued_frames = (gint8 *)
malloc(sizeof(gint8) * v4lmjpegsink->breq.count);
if (!v4lmjpegsink->isqueued_queued_frames)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to create queue tracker: %s",
g_strerror(errno));
return FALSE;
}
v4lmjpegsink->cond_queued_frames = (GCond **)
malloc(sizeof(GCond *) * v4lmjpegsink->breq.count);
if (!v4lmjpegsink->cond_queued_frames)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to create queue condition holders: %s",
g_strerror(errno));
return FALSE;
}
for (n=0;n<v4lmjpegsink->breq.count;n++)
v4lmjpegsink->cond_queued_frames[n] = g_cond_new();
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_playback_start()
* start playback system
* return value: TRUE on success, FALSE on error
******************************************************/
gboolean
gst_v4lmjpegsink_playback_start (GstV4lMjpegSink *v4lmjpegsink)
{
GError *error;
gint n;
DEBUG("starting playback");
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
/* mark all buffers as unqueued */
for (n=0;n<v4lmjpegsink->breq.count;n++)
v4lmjpegsink->isqueued_queued_frames[n] = 0;
v4lmjpegsink->current_frame = -1;
/* create sync() thread */
v4lmjpegsink->thread_queued_frames = g_thread_create(
gst_v4lmjpegsink_sync_thread, (void *) v4lmjpegsink, TRUE, &error);
if(!v4lmjpegsink->thread_queued_frames)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to create sync thread: %s", error->message);
return FALSE;
}
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_get_buffer()
* get address of a buffer
* return value: buffer's address or NULL
******************************************************/
guint8 *
gst_v4lmjpegsink_get_buffer (GstV4lMjpegSink *v4lmjpegsink,
gint num)
{
DEBUG("gst_v4lmjpegsink_get_buffer(), num = %d", num);
if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsink)) ||
!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsink)))
return NULL;
if (num < 0 || num >= v4lmjpegsink->breq.count)
return NULL;
return GST_V4LELEMENT(v4lmjpegsink)->buffer+(v4lmjpegsink->breq.size*num);
}
/******************************************************
* gst_v4lmjpegsink_play_frame()
* queue a new buffer
* return value: TRUE on success, FALSE on error
******************************************************/
gboolean
gst_v4lmjpegsink_play_frame (GstV4lMjpegSink *v4lmjpegsink,
gint num)
{
DEBUG("playing frame %d", num);
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
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;
}
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