gstreamer/sys/decklink/capture.cpp
Vincent Penquerc'h c78edf5afc decklink: initialize priv to NULL
While the code that creates the object sets priv to some existing
pointer after new, this ensures any future new not doing this will
hit the various priv!=NULL asserts in the code.

Coverity 1139935
2014-04-09 11:43:23 +01:00

158 lines
4.5 KiB
C++

/* -LICENSE-START-
** Copyright (c) 2009 Blackmagic Design
**
** Permission is hereby granted, free of charge, to any person or organization
** obtaining a copy of the software and accompanying documentation covered by
** this license (the "Software") to use, reproduce, display, distribute,
** execute, and transmit the Software, and to prepare derivative works of the
** Software, and to permit third-parties to whom the Software is furnished to
** do so, all subject to the following:
**
** The copyright notices in the Software and this entire statement, including
** the above license grant, this restriction and the following disclaimer,
** must be included in all copies of the Software, in whole or in part, and
** all derivative works of the Software, unless such copies or derivative
** works are solely in the form of machine-executable object code generated by
** a source language processor.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
** DEALINGS IN THE SOFTWARE.
** -LICENSE-END-
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "gstdecklinksrc.h"
#include "capture.h"
#define GST_CAT_DEFAULT gst_decklink_src_debug_category
static BMDTimecodeFormat g_timecodeFormat = (BMDTimecodeFormat) 0;
DeckLinkCaptureDelegate::DeckLinkCaptureDelegate ():priv (NULL), m_refCount (0)
{
g_mutex_init (&m_mutex);
}
DeckLinkCaptureDelegate::~DeckLinkCaptureDelegate ()
{
g_mutex_clear (&m_mutex);
}
ULONG DeckLinkCaptureDelegate::AddRef (void)
{
g_mutex_lock (&m_mutex);
m_refCount++;
g_mutex_unlock (&m_mutex);
return (ULONG) m_refCount;
}
ULONG DeckLinkCaptureDelegate::Release (void)
{
g_mutex_lock (&m_mutex);
m_refCount--;
g_mutex_unlock (&m_mutex);
if (m_refCount == 0) {
delete
this;
return 0;
}
return (ULONG) m_refCount;
}
HRESULT
DeckLinkCaptureDelegate::VideoInputFrameArrived (IDeckLinkVideoInputFrame *
videoFrame, IDeckLinkAudioInputPacket * audioFrame)
{
GstDecklinkSrc *decklinksrc;
const char *timecodeString = NULL;
g_return_val_if_fail (priv != NULL, S_OK);
g_return_val_if_fail (GST_IS_DECKLINK_SRC (priv), S_OK);
decklinksrc = GST_DECKLINK_SRC (priv);
if (videoFrame == NULL) {
GST_WARNING_OBJECT (decklinksrc, "video frame is NULL");
return S_OK;
}
if (audioFrame == NULL) {
GST_WARNING_OBJECT (decklinksrc, "audio frame is NULL");
return S_OK;
}
if (videoFrame->GetFlags () & bmdFrameHasNoInputSource) {
GST_DEBUG_OBJECT (decklinksrc, "Frame received - No input signal detected");
return S_OK;
}
/* FIXME: g_timecodeFormat is inited to 0 and never changed? dead code? */
if (g_timecodeFormat != 0) {
IDeckLinkTimecode *timecode;
if (videoFrame->GetTimecode (g_timecodeFormat, &timecode) == S_OK) {
timecode->GetString (&timecodeString);
CONVERT_COM_STRING (timecodeString);
}
}
GST_DEBUG_OBJECT (decklinksrc, "Frame received [%s] - %s - Size: %li bytes",
timecodeString != NULL ? timecodeString : "No timecode",
"Valid Frame", videoFrame->GetRowBytes () * videoFrame->GetHeight ());
if (timecodeString)
FREE_COM_STRING (timecodeString);
g_mutex_lock (&decklinksrc->mutex);
if (decklinksrc->video_frame != NULL) {
decklinksrc->dropped_frames++;
decklinksrc->video_frame->Release();
if (decklinksrc->audio_frame) {
decklinksrc->audio_frame->Release();
}
}
videoFrame->AddRef ();
decklinksrc->video_frame = videoFrame;
if (audioFrame) {
audioFrame->AddRef ();
decklinksrc->audio_frame = audioFrame;
}
/* increment regardless whether frame was dropped or not */
decklinksrc->frame_num++;
g_cond_signal (&decklinksrc->cond);
g_mutex_unlock (&decklinksrc->mutex);
return S_OK;
}
HRESULT
DeckLinkCaptureDelegate::VideoInputFormatChanged (
BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode * mode,
BMDDetectedVideoInputFormatFlags)
{
GstDecklinkSrc *decklinksrc;
g_return_val_if_fail (priv != NULL, S_OK);
g_return_val_if_fail (GST_IS_DECKLINK_SRC (priv), S_OK);
decklinksrc = GST_DECKLINK_SRC (priv);
GST_ERROR_OBJECT (decklinksrc, "unimplemented: video input format changed");
return S_OK;
}