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First version of a MJPEG-V4L sink plugin

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Original commit message from CVS:
First version of a MJPEG-V4L sink plugin
This commit is contained in:
Ronald S. Bultje 2001-12-24 21:42:14 +00:00
parent 0911c66b4b
commit 0574040487
4 changed files with 1125 additions and 0 deletions
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389
sys/v4l/gstv4lmjpegsink.c Normal file
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/* G-Streamer hardware MJPEG video sink plugin
* Copyright (C) 2001 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 <string.h>
#include "v4lmjpegsink_calls.h"
static GstElementDetails gst_v4lmjpegsink_details = {
"Video (video4linux/MJPEG) sink",
"Sink/Video",
"Writes MJPEG-encoded frames to a zoran MJPEG/video4linux device",
VERSION,
"Ronald Bultje <rbultje@ronald.bitfreak.net>",
"(C) 2001",
};
/* v4lmjpegsink signals and args */
enum {
SIGNAL_FRAME_DISPLAYED,
SIGNAL_HAVE_SIZE,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_NUMBUFS,
ARG_BUFSIZE,
ARG_X_OFFSET,
ARG_Y_OFFSET,
ARG_FRAMES_DISPLAYED,
ARG_FRAME_TIME,
};
GST_PADTEMPLATE_FACTORY (sink_template,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"v4lmjpegsink_caps",
"video/jpeg",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT)
)
)
/* init functions */
static void gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass *klass);
static void gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink);
/* the chain of buffers */
static void gst_v4lmjpegsink_chain (GstPad *pad,
GstBuffer *buf);
/* get/set gst object functions */
static void gst_v4lmjpegsink_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gst_v4lmjpegsink_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gst_v4lmjpegsink_close (GstV4lMjpegSink *v4lmjpegsink);
static GstElementStateReturn gst_v4lmjpegsink_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
static guint gst_v4lmjpegsink_signals[LAST_SIGNAL] = { 0 };
GType
gst_v4lmjpegsink_get_type (void)
{
static GType v4lmjpegsink_type = 0;
if (!v4lmjpegsink_type) {
static const GTypeInfo v4lmjpegsink_info = {
sizeof(GstV4lMjpegSinkClass),
NULL,
NULL,
(GClassInitFunc)gst_v4lmjpegsink_class_init,
NULL,
NULL,
sizeof(GstV4lMjpegSink),
0,
(GInstanceInitFunc)gst_v4lmjpegsink_init,
};
v4lmjpegsink_type = g_type_register_static(GST_TYPE_V4LELEMENT, "GstV4lMjpegSink", &v4lmjpegsink_info, 0);
}
return v4lmjpegsink_type;
}
static void
gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_V4LELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NUMBUFS,
g_param_spec_int("num_buffers","num_buffers","num_buffers",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BUFSIZE,
g_param_spec_int("buffer_size","buffer_size","buffer_size",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_X_OFFSET,
g_param_spec_int("x_offset","x_offset","x_offset",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_Y_OFFSET,
g_param_spec_int("y_offset","y_offset","y_offset",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAMES_DISPLAYED,
g_param_spec_int("frames_displayed","frames_displayed","frames_displayed",
G_MININT,G_MAXINT,0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAME_TIME,
g_param_spec_int("frame_time","frame_time","frame_time",
G_MININT,G_MAXINT,0,G_PARAM_READABLE));
gobject_class->set_property = gst_v4lmjpegsink_set_property;
gobject_class->get_property = gst_v4lmjpegsink_get_property;
gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED] =
g_signal_new ("frame_displayed", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstV4lMjpegSinkClass, frame_displayed), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gst_v4lmjpegsink_signals[SIGNAL_HAVE_SIZE] =
g_signal_new ("have_size", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstV4lMjpegSinkClass, have_size), NULL, NULL,
gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
gstelement_class->change_state = gst_v4lmjpegsink_change_state;
}
static void
gst_v4lmjpegsink_newcaps (GstPad *pad,
GstCaps *caps)
{
GstV4lMjpegSink *v4lmjpegsink;
v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
v4lmjpegsink->width = gst_caps_get_int (caps, "width");
v4lmjpegsink->height = gst_caps_get_int (caps, "height");
gst_v4lmjpegsink_set_playback(v4lmjpegsink,
v4lmjpegsink->width, v4lmjpegsink->height,
v4lmjpegsink->x_offset, v4lmjpegsink->y_offset,
GST_V4LELEMENT(v4lmjpegsink)->norm, 0); /* TODO: interlacing */
g_signal_emit (G_OBJECT (v4lmjpegsink), gst_v4lmjpegsink_signals[SIGNAL_HAVE_SIZE], 0,
v4lmjpegsink->width, v4lmjpegsink->height);
}
static void
gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink)
{
v4lmjpegsink->sinkpad = gst_pad_new_from_template(GST_PADTEMPLATE_GET (sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (v4lmjpegsink), v4lmjpegsink->sinkpad);
gst_pad_set_chain_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_chain);
gst_pad_set_newcaps_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_newcaps);
v4lmjpegsink->clock = gst_clock_get_system();
gst_clock_register(v4lmjpegsink->clock, GST_OBJECT(v4lmjpegsink));
v4lmjpegsink->width = -1;
v4lmjpegsink->height = -1;
v4lmjpegsink->x_offset = -1;
v4lmjpegsink->y_offset = -1;
v4lmjpegsink->numbufs = 64;
v4lmjpegsink->bufsize = 256;
GST_FLAG_SET(v4lmjpegsink, GST_ELEMENT_THREAD_SUGGESTED);
}
static void
gst_v4lmjpegsink_chain (GstPad *pad,
GstBuffer *buf)
{
GstV4lMjpegSink *v4lmjpegsink;
GstClockTimeDiff jitter;
gint num;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
if (!GST_BUFFER_FLAG_IS_SET(buf, GST_BUFFER_FLUSH)) {
GST_DEBUG (0,"videosink: clock wait: %llu\n", GST_BUFFER_TIMESTAMP(buf));
jitter = gst_clock_current_diff(v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP (buf));
if (jitter > 500000 || jitter < -500000)
{
GST_DEBUG (0, "jitter: %lld\n", jitter);
gst_clock_set (v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP (buf));
}
else {
gst_clock_wait(v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP(buf), GST_OBJECT(v4lmjpegsink));
}
}
/* check size */
if (GST_BUFFER_SIZE(buf) > v4lmjpegsink->breq.size)
{
gst_element_error(GST_ELEMENT(v4lmjpegsink),
"Buffer too big (%d KB), max. buffersize is %d KB",
GST_BUFFER_SIZE(buf)/1024, v4lmjpegsink->breq.size/1024);
return;
}
/* put JPEG data to the device */
gst_v4lmjpegsink_wait_frame(v4lmjpegsink, &num);
memcpy(gst_v4lmjpegsink_get_buffer(v4lmjpegsink, num),
GST_BUFFER_DATA(buf), GST_BUFFER_SIZE(buf));
gst_v4lmjpegsink_play_frame(v4lmjpegsink, num);
g_signal_emit(G_OBJECT(v4lmjpegsink),gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED],0);
gst_buffer_unref(buf);
}
static void
gst_v4lmjpegsink_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GstV4lMjpegSink *v4lmjpegsink;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_V4LMJPEGSINK (object));
v4lmjpegsink = GST_V4LMJPEGSINK (object);
switch (prop_id)
{
case ARG_NUMBUFS:
v4lmjpegsink->numbufs = g_value_get_int(value);
break;
case ARG_BUFSIZE:
v4lmjpegsink->bufsize = g_value_get_int(value);
break;
case ARG_X_OFFSET:
v4lmjpegsink->x_offset = g_value_get_int(value);
break;
case ARG_Y_OFFSET:
v4lmjpegsink->y_offset = g_value_get_int(value);
break;
default:
parent_class->set_property(object, prop_id, value, pspec);
break;
}
}
static void
gst_v4lmjpegsink_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GstV4lMjpegSink *v4lmjpegsink;
/* it's not null if we got it, but it might not be ours */
v4lmjpegsink = GST_V4LMJPEGSINK(object);
switch (prop_id) {
case ARG_FRAMES_DISPLAYED:
g_value_set_int (value, v4lmjpegsink->frames_displayed);
break;
case ARG_FRAME_TIME:
g_value_set_int (value, v4lmjpegsink->frame_time/1000000);
break;
case ARG_NUMBUFS:
g_value_set_int (value, v4lmjpegsink->numbufs);
break;
case ARG_BUFSIZE:
g_value_set_int (value, v4lmjpegsink->bufsize);
break;
default:
parent_class->get_property(object, prop_id, value, pspec);
break;
}
}
static GstElementStateReturn
gst_v4lmjpegsink_change_state (GstElement *element)
{
GstV4lMjpegSink *v4lmjpegsink;
g_return_val_if_fail (GST_IS_V4LMJPEGSINK (element), GST_STATE_FAILURE);
v4lmjpegsink = GST_V4LMJPEGSINK(element);
/* set up change state */
switch (GST_STATE_PENDING(element)) {
case GST_STATE_READY:
if (GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsink))) {
/* stop playback, unmap all buffers */
if (!gst_v4lmjpegsink_playback_deinit(v4lmjpegsink))
return GST_STATE_FAILURE;
}
break;
case GST_STATE_PAUSED:
if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsink))) {
/* set buffer info */
if (!gst_v4lmjpegsink_set_buffer(v4lmjpegsink,
v4lmjpegsink->numbufs, v4lmjpegsink->bufsize))
return GST_STATE_FAILURE;
if (!gst_v4lmjpegsink_playback_init(v4lmjpegsink))
return GST_STATE_FAILURE;
}
else {
/* de-queue all queued buffers */
if (!gst_v4lmjpegsink_playback_stop(v4lmjpegsink))
return GST_STATE_FAILURE;
}
break;
case GST_STATE_PLAYING:
/* start */
if (!gst_v4lmjpegsink_playback_start(v4lmjpegsink))
return GST_STATE_FAILURE;
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GModule *module,
GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the v4lmjpegsink element */
factory = gst_elementfactory_new("v4lmjpegsink",GST_TYPE_V4LMJPEGSINK,
&gst_v4lmjpegsink_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory,
GST_PADTEMPLATE_GET (sink_template));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"v4lmjpegsink",
plugin_init
};

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sys/v4l/gstv4lmjpegsink.h Normal file
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/* G-Streamer hardware MJPEG video sink plugin
* Copyright (C) 2001 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.
*/
#ifndef __GST_V4LMJPEGSINK_H__
#define __GST_V4LMJPEGSINK_H__
#include <gstv4lelement.h>
#include <sys/time.h>
#include <videodev_mjpeg.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_V4LMJPEGSINK \
(gst_v4lmjpegsink_get_type())
#define GST_V4LMJPEGSINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4LMJPEGSINK,GstV4lMjpegSink))
#define GST_V4LMJPEGSINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4LMJPEGSINK,GstV4lMjpegSinkClass))
#define GST_IS_V4LMJPEGSINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4LMJPEGSINK))
#define GST_IS_V4LMJPEGSINK_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4LMJPEGSINK))
typedef struct _GstV4lMjpegSink GstV4lMjpegSink;
typedef struct _GstV4lMjpegSinkClass GstV4lMjpegSinkClass;
struct _GstV4lMjpegSink {
GstV4lElement v4lelement;
/* the sink pas */
GstPad *sinkpad;
/* frame properties for common players */
gint frames_displayed;
guint64 frame_time;
/* system clock object */
GstClock *clock;
/* buffer/capture info */
struct mjpeg_sync bsync;
struct mjpeg_requestbuffers breq;
/* thread to keep track of synced frames */
gint8 *isqueued_queued_frames; /* 1 = queued, 0 = unqueued, -1 = error */
pthread_t thread_queued_frames;
pthread_mutex_t mutex_queued_frames;
pthread_cond_t *cond_queued_frames;
gint current_frame;
/* width/height/norm of the jpeg stream */
gint width;
gint height;
/* cache values */
gint x_offset;
gint y_offset;
gint numbufs;
gint bufsize; /* in KB */
};
struct _GstV4lMjpegSinkClass {
GstV4lElementClass parent_class;
/* signals */
void (*frame_displayed) (GstElement *element);
void (*have_size) (GstElement *element, guint width, guint height);
};
GType gst_v4lmjpegsink_get_type(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_SDLVIDEOSINK_H__ */

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sys/v4l/v4lmjpegsink_calls.c Normal file
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/* G-Streamer hardware MJPEG video sink plugin
* Copyright (C) 2001 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:
gst_element_info(GST_ELEMENT(v4lmjpegsink),
"Sync thread got signalled to exit");
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_element_info(GST_ELEMENT(v4lmjpegsink),
"Got %ld buffers of size %ld KB",
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;
}
/* TODO: 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;
}

59
sys/v4l/v4lmjpegsink_calls.h Normal file
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@ -0,0 +1,59 @@
/* G-Streamer hardware MJPEG video sink plugin
* Copyright (C) 2001 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.
*/
#ifndef __V4L_MJPEG_SINK_CALLS_H__
#define __V4L_MJPEG_SINK_CALLS_H__
#include "gstv4lmjpegsink.h"
#include "v4l_calls.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* frame playback on device */
gboolean gst_v4lmjpegsink_set_buffer (GstV4lMjpegSink *v4lmjpegsink,
gint numbufs,
gint bufsize);
gboolean gst_v4lmjpegsink_set_playback (GstV4lMjpegSink *v4lmjpegsink,
gint width,
gint height,
gint x_offset,
gint y_offset,
gint norm,
gint interlacing);
gboolean gst_v4lmjpegsink_playback_init (GstV4lMjpegSink *v4lmjpegsink);
gboolean gst_v4lmjpegsink_playback_start (GstV4lMjpegSink *v4lmjpegsink);
guint8 * gst_v4lmjpegsink_get_buffer (GstV4lMjpegSink *v4lmjpegsink,
gint num);
gboolean gst_v4lmjpegsink_play_frame (GstV4lMjpegSink *v4lmjpegsink,
gint num);
gboolean gst_v4lmjpegsink_wait_frame (GstV4lMjpegSink *v4lmjpegsink,
gint *num);
gboolean gst_v4lmjpegsink_playback_stop (GstV4lMjpegSink *v4lmjpegsink);
gboolean gst_v4lmjpegsink_playback_deinit (GstV4lMjpegSink *v4lmjpegsink);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __V4L_MJPEG_SINK_CALLS_H__ */