gstreamer/sys/v4l/v4lmjpegsink_calls.c
Andy Wingo 1049c792c8 removal of //-style comments don't link plugins to core libs -- the versioning is done internally to the plugins with...
Original commit message from CVS:
* removal of //-style comments
* don't link plugins to core libs -- the versioning is done internally to the plugins with the plugin_info struct,
and symbol resolution is lazy, so we can always know if a plugin can be loaded by the plugin_info data. in theory.
2002-03-19 04:10:06 +00:00

579 lines
16 KiB
C

/* 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.
*/
/*#define DEBUG */
#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
/******************************************************
* 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 */
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_sync_thread()\n");
#endif
/* Allow easy shutting down by other processes... */
pthread_setcancelstate( PTHREAD_CANCEL_ENABLE, NULL );
pthread_setcanceltype( PTHREAD_CANCEL_ASYNCHRONOUS, NULL );
while (1)
{
pthread_mutex_lock(&(v4lmjpegsink->mutex_queued_frames));
if (!v4lmjpegsink->isqueued_queued_frames[frame])
{
pthread_cond_wait(&(v4lmjpegsink->cond_queued_frames[frame]),
&(v4lmjpegsink->mutex_queued_frames));
}
if (v4lmjpegsink->isqueued_queued_frames[frame] != 1)
{
pthread_mutex_unlock(&(v4lmjpegsink->mutex_queued_frames));
goto end;
}
pthread_mutex_unlock(&(v4lmjpegsink->mutex_queued_frames));
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, sys_errlist[errno]);
pthread_mutex_lock(&(v4lmjpegsink->mutex_queued_frames));
v4lmjpegsink->isqueued_queued_frames[frame] = -1;
pthread_cond_broadcast(&(v4lmjpegsink->cond_queued_frames[frame]));
pthread_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;
}
pthread_mutex_lock(&(v4lmjpegsink->mutex_queued_frames));
v4lmjpegsink->isqueued_queued_frames[frame] = 0;
pthread_cond_broadcast(&(v4lmjpegsink->cond_queued_frames[frame]));
pthread_mutex_unlock(&(v4lmjpegsink->mutex_queued_frames));
}
frame = (frame+1)%v4lmjpegsink->breq.count;
}
end:
#ifdef DEBUG
fprintf(stderr, "Sync thread got signalled to exit\n");
#endif
pthread_exit(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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_queue_frame(), num = %d\n",
num);
#endif
/* 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, sys_errlist[errno]);
return FALSE;
}
pthread_mutex_lock(&(v4lmjpegsink->mutex_queued_frames));
v4lmjpegsink->isqueued_queued_frames[num] = 1;
pthread_cond_broadcast(&(v4lmjpegsink->cond_queued_frames[num]));
pthread_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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_sync_frame(), num = %d\n",
num);
#endif
/* calculate next frame */
v4lmjpegsink->current_frame = (v4lmjpegsink->current_frame+1)%v4lmjpegsink->breq.count;
*num = v4lmjpegsink->current_frame;
pthread_mutex_lock(&(v4lmjpegsink->mutex_queued_frames));
if (v4lmjpegsink->isqueued_queued_frames[*num] == 1)
{
pthread_cond_wait(&(v4lmjpegsink->cond_queued_frames[*num]),
&(v4lmjpegsink->mutex_queued_frames));
}
if (v4lmjpegsink->isqueued_queued_frames[*num] != 0)
{
pthread_mutex_unlock(&(v4lmjpegsink->mutex_queued_frames));
return FALSE;
}
else
pthread_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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_set_buffer(), numbufs = %d, bufsize = %d KB\n",
numbufs, bufsize);
#endif
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;
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_set_playback(), "
"size = %dx%d, X/Y-offsets = %d/%d, norm = %d, interlacing = %d\n",
width, height, x_offset, y_offset, norm, interlacing);
#endif
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",
sys_errlist[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",
sys_errlist[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;
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_playback_init()\n");
#endif
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",
sys_errlist[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, 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",
sys_errlist[errno]);
GST_V4LELEMENT(v4lmjpegsink)->buffer = NULL;
return FALSE;
}
/* allocate/init the pthread thingies */
pthread_mutex_init(&(v4lmjpegsink->mutex_queued_frames), NULL);
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",
sys_errlist[errno]);
return FALSE;
}
v4lmjpegsink->cond_queued_frames = (pthread_cond_t *)
malloc(sizeof(pthread_cond_t) * v4lmjpegsink->breq.count);
if (!v4lmjpegsink->cond_queued_frames)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to create queue condition holders: %s",
sys_errlist[errno]);
return FALSE;
}
for (n=0;n<v4lmjpegsink->breq.count;n++)
pthread_cond_init(&(v4lmjpegsink->cond_queued_frames[n]), NULL);
return TRUE;
}
/******************************************************
* gst_v4lmjpegsink_playback_start()
* start playback system
* return value: TRUE on success, FALSE on error
******************************************************/
gboolean
gst_v4lmjpegsink_playback_start (GstV4lMjpegSink *v4lmjpegsink)
{
gint n;
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_playback_start()\n");
#endif
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 */
if (pthread_create(&(v4lmjpegsink->thread_queued_frames), NULL,
gst_v4lmjpegsink_sync_thread, (void *) v4lmjpegsink))
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Failed to create sync thread: %s",
sys_errlist[errno]);
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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_get_buffer(), num = %d\n",
num);
#endif
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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_play_frame()\n");
#endif
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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_wait_frame(), num = %d\n",
num);
#endif
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;
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_playback_stop()\n");
#endif
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 */
pthread_join(v4lmjpegsink->thread_queued_frames, NULL);
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)
{
#ifdef DEBUG
fprintf(stderr, "V4LMJPEGSINK: gst_v4lmjpegsink_playback_deinit()\n");
#endif
GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lmjpegsink));
GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lmjpegsink));
/* free pthread thingies */
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;
}