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fix freeze when trying to open non existing video device

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bugfixes
This commit is contained in:
niels
2011-04-11 01:24:40 +02:00
parent fa73aa5d67
commit 2d82c73b9d
1 changed files with 35 additions and 20 deletions
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55
veejay-current/veejay-server/libstream/v4l2utils.c
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@@ -114,7 +114,8 @@ typedef struct
uint8_t *tmpbuf;
int is_streaming;
int pause_read;
int pause_capture;
int pause_capture_status;
AVCodec *codec;
AVCodecContext *c;
AVFrame *picture;
@@ -653,6 +654,7 @@ int v4l2_poll( void *d , int nfds, int timeout )
void *v4l2open ( const char *file, const int input_channel, int host_fmt, int wid, int hei, float fps, char norm )
{
//@ in case of thread, check below is done twice
if(!v4l2_verify_file( file ) ) {
return NULL;
}
@@ -1668,6 +1670,12 @@ static void *v4l2_grabber_thread( void *v )
lock_( v );
v4l2_thread_info *i = (v4l2_thread_info*) v;
if(!v4l2_verify_file( i->file ) ) {
i->stop = 1;
pthread_exit(NULL);
return NULL;
}
v4l2info *v4l2 = v4l2open( i->file, i->channel, i->host_fmt, i->wid, i->hei, i->fps, i->norm );
if( v4l2 == NULL ) {
veejay_msg(0, "v4l2: error opening v4l2 device '%s'",i->file );
@@ -1707,7 +1715,23 @@ static void *v4l2_grabber_thread( void *v )
while( 1 ) {
int err = (v4l2->rw);
lock_(i);
if( v4l2->pause_capture ) {
if( v4l2->rw == 0 ) {
if( !v4l2->pause_capture_status) {
v4l2_stop_video_capture(v4l2);
v4l2_vidioc_qbuf( v4l2 );
} else {
v4l2_start_video_capture(v4l2);
}
} else {
v4l2->pause_read = !v4l2->pause_capture_status;
}
v4l2->pause_capture = 0;
}
unlock_(i);
if( ( !v4l2->is_streaming && v4l2->rw == 0 ) || ( v4l2->rw == 1 && v4l2->pause_read ) ) {
usleep(1000);
continue;
@@ -1724,6 +1748,7 @@ static void *v4l2_grabber_thread( void *v )
if( err == -1 ) {
if( i->retries < 0 ) {
veejay_msg(0,"v4l2: giving up on this device, too many errors.");
i->stop = 1;
v4l2_close( v4l2 );
pthread_exit(NULL);
return NULL;
@@ -1764,20 +1789,8 @@ void v4l2_thread_set_status( v4l2_thread_info *i, int status )
{
v4l2info *v = (v4l2info* )i->v4l2;
lock_(i);
if( v->rw == 0 ) {
if( status == 0 ) {
v4l2_stop_video_capture(i->v4l2);
v4l2_vidioc_qbuf( i->v4l2 );
} else {
v4l2_start_video_capture(i->v4l2);
}
} else {
if( status == 0 ) {
v->pause_read = 1;
} else {
v->pause_read = 0;
}
}
v->pause_capture = 1;
v->pause_capture_status = status;
unlock_(i);
}
@@ -1863,16 +1876,18 @@ void *v4l2_thread_new( char *file, int channel, int host_fmt, int wid, int hei,
usleep(100);
lock_(i);
ready = i->grabbing;
if( i->stop ) {
ready = i->stop;
}
unlock_(i);
if(ready)
break;
retries--;
}
#ifdef STRICT_CHECKING
v4l2info *v = (v4l2info*)i->v4l2;
assert( v != NULL );
#endif
if( i->stop )
pthread_mutex_destroy(&(i->mutex));
return i->v4l2;
}
#endif