gstreamer/sys/avc/gstavcsrc.cpp

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/* GStreamer
* Copyright (C) 2011 David Schleef <ds@entropywave.com>
*
* 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., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstavcsrc
*
* The avcsrc element captures video from an OS/X AVC Video Services
* devices, typically a FireWire camera.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v avcsrc ! decodebin ! osxvideosink
* ]|
*
* This pipeline captures from an AVC source, decodes the stream (either
* DV or HDV), and displays the video.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <AVCVideoServices/AVCVideoServices.h>
using namespace AVS;
#include <gst/gst.h>
#include <gst/base/gstbasesrc.h>
#include "gstavcsrc.h"
GST_DEBUG_CATEGORY_STATIC (gst_avc_src_debug_category);
#define GST_CAT_DEFAULT gst_avc_src_debug_category
/* prototypes */
static void gst_avc_src_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_avc_src_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_avc_src_dispose (GObject * object);
static void gst_avc_src_finalize (GObject * object);
static GstCaps *gst_avc_src_get_caps (GstBaseSrc * src);
static gboolean gst_avc_src_start (GstBaseSrc * src);
static gboolean gst_avc_src_stop (GstBaseSrc * src);
static gboolean gst_avc_src_is_seekable (GstBaseSrc * src);
static gboolean gst_avc_src_unlock (GstBaseSrc * src);
static gboolean gst_avc_src_event (GstBaseSrc * src, GstEvent * event);
static GstFlowReturn
gst_avc_src_create (GstBaseSrc * src, guint64 offset, guint size,
GstBuffer ** buf);
static gboolean gst_avc_src_query (GstBaseSrc * src, GstQuery * query);
static gboolean gst_avc_src_unlock_stop (GstBaseSrc * src);
enum
{
PROP_0
};
/* pad templates */
static GstStaticPadTemplate gst_avc_src_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS
("video/dv,systemstream=true;video/mpegts,systemstream=true,packetsize=188")
);
/* class initialization */
#define DEBUG_INIT(bla) \
GST_DEBUG_CATEGORY_INIT (gst_avc_src_debug_category, "avcsrc", 0, \
"debug category for avcsrc element");
GST_BOILERPLATE_FULL (GstAVCSrc, gst_avc_src, GstBaseSrc,
GST_TYPE_BASE_SRC, DEBUG_INIT);
static void
gst_avc_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_avc_src_src_template));
gst_element_class_set_static_metadata (element_class,
"AVC Video Services Source", "Video/Source",
"Captures DV or HDV video from Firewire port",
"David Schleef <ds@entropywave.com>");
}
static void
gst_avc_src_class_init (GstAVCSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);
gobject_class->set_property = gst_avc_src_set_property;
gobject_class->get_property = gst_avc_src_get_property;
gobject_class->dispose = gst_avc_src_dispose;
gobject_class->finalize = gst_avc_src_finalize;
base_src_class->get_caps = GST_DEBUG_FUNCPTR (gst_avc_src_get_caps);
base_src_class->start = GST_DEBUG_FUNCPTR (gst_avc_src_start);
base_src_class->stop = GST_DEBUG_FUNCPTR (gst_avc_src_stop);
base_src_class->is_seekable = GST_DEBUG_FUNCPTR (gst_avc_src_is_seekable);
base_src_class->unlock = GST_DEBUG_FUNCPTR (gst_avc_src_unlock);
base_src_class->event = GST_DEBUG_FUNCPTR (gst_avc_src_event);
base_src_class->create = GST_DEBUG_FUNCPTR (gst_avc_src_create);
if (0)
base_src_class->query = GST_DEBUG_FUNCPTR (gst_avc_src_query);
if (0)
base_src_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_avc_src_unlock_stop);
}
static void
gst_avc_src_init (GstAVCSrc * avcsrc, GstAVCSrcClass * avcsrc_class)
{
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gst_base_src_set_live (GST_BASE_SRC (avcsrc), TRUE);
avcsrc->srcpad = gst_pad_new_from_static_template (&gst_avc_src_src_template,
"src");
avcsrc->queue = gst_atomic_queue_new (16);
avcsrc->cond = g_cond_new ();
avcsrc->queue_lock = g_mutex_new ();
}
void
gst_avc_src_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
/* GstAVCSrc *avcsrc = GST_AVC_SRC (object); */
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_avc_src_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
/* GstAVCSrc *avcsrc = GST_AVC_SRC (object); */
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_avc_src_dispose (GObject * object)
{
/* GstAVCSrc *avcsrc = GST_AVC_SRC (object); */
/* clean up as possible. may be called multiple times */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_avc_src_finalize (GObject * object)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (object);
/* clean up object here */
gst_atomic_queue_unref (avcsrc->queue);
g_cond_free (avcsrc->cond);
g_mutex_free (avcsrc->queue_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_avc_src_get_caps (GstBaseSrc * src)
{
/* GstAVCSrc *avcsrc = GST_AVC_SRC (src); */
return gst_caps_from_string ("video/mpegts,systemstream=true,packetsize=188");
}
#define kNumCyclesInMPEGReceiverSegment 200
#define kNumSegmentsInMPEGReceiverProgram 10
void
MPEGReceiverMessageReceivedProc (UInt32 msg, UInt32 param1, UInt32 param2,
void *pRefCon)
{
}
IOReturn
MyStructuredDataPushProc (UInt32 CycleDataCount,
MPEGReceiveCycleData * pCycleData, void *pRefCon)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (pRefCon);
if (avcsrc) {
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UInt32 numPackets = 0;
for (UInt32 cycle = 0; cycle < CycleDataCount; cycle++)
numPackets += pCycleData[cycle].tsPacketCount;
GstBuffer *buffer;
buffer = gst_buffer_new_and_alloc (numPackets*kMPEG2TSPacketSize);
guint8 *data = GST_BUFFER_DATA (buffer);
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for (UInt32 cycle = 0; cycle < CycleDataCount; cycle++) {
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GST_LOG("Received cycle %lu of %lu - %lu packets (fw time %lx)",
cycle, CycleDataCount, pCycleData[cycle].tsPacketCount,
pCycleData[cycle].fireWireTimeStamp);
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for (UInt32 sourcePacket = 0; sourcePacket < pCycleData[cycle].tsPacketCount;
sourcePacket++) {
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memcpy (data,
pCycleData[cycle].pBuf[sourcePacket], kMPEG2TSPacketSize);
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data += kMPEG2TSPacketSize;
avcsrc->packets_enqueued++;
}
}
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gst_atomic_queue_push (avcsrc->queue, buffer);
g_mutex_lock (avcsrc->queue_lock);
g_cond_signal (avcsrc->cond);
g_mutex_unlock (avcsrc->queue_lock);
}
return 0;
}
static gboolean
gst_avc_src_start (GstBaseSrc * src)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GST_DEBUG_OBJECT (avcsrc, "start");
avcsrc->unlock = FALSE;
// Create a AVCDeviceController
if (!avcsrc->pAVCDeviceController)
CreateAVCDeviceController (&avcsrc->pAVCDeviceController);
if (!avcsrc->pAVCDeviceController) {
// TODO: This should never happen (unless we've run out of memory), but we should handle it cleanly anyway
GST_ERROR ("Failed to create AVC device controller.");
return FALSE;
}
GST_INFO ("Created AVC device controller.");
if (avcsrc->deviceIndex >= CFArrayGetCount (avcsrc->pAVCDeviceController->avcDeviceArray)) {
GST_ERROR ("Failed to find AVC device %d", avcsrc->deviceIndex);
return FALSE;
}
avcsrc->pAVCDevice = (AVCDevice *)
CFArrayGetValueAtIndex (avcsrc->pAVCDeviceController->avcDeviceArray,
avcsrc->deviceIndex);
if (!avcsrc->pAVCDevice) {
GST_ERROR ("Failed to find AVC device %d", avcsrc->deviceIndex);
return FALSE;
}
GST_INFO ("Found device with GUID 0x%016llX\n", avcsrc->pAVCDevice->guid);
avcsrc->pAVCDevice->openDevice (nil, nil);
avcsrc->pAVCDeviceStream = avcsrc->pAVCDevice->CreateMPEGReceiverForDevicePlug (0, nil, // We'll install the structured callback later (MyStructuredDataPushProc),
nil,
MPEGReceiverMessageReceivedProc,
nil,
nil, kNumCyclesInMPEGReceiverSegment, kNumSegmentsInMPEGReceiverProgram);
avcsrc->pAVCDeviceStream->pMPEGReceiver->registerStructuredDataPushCallback
(MyStructuredDataPushProc,
kNumCyclesInMPEGReceiverSegment, (void *) avcsrc);
avcsrc->pAVCDevice->StartAVCDeviceStream (avcsrc->pAVCDeviceStream);
return TRUE;
}
static gboolean
gst_avc_src_stop (GstBaseSrc * src)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GstBuffer *buffer;
GST_DEBUG_OBJECT (avcsrc, "stop");
// Stop the stream
avcsrc->pAVCDevice->StopAVCDeviceStream(avcsrc->pAVCDeviceStream);
// Destroy the stream
avcsrc->pAVCDevice->DestroyAVCDeviceStream(avcsrc->pAVCDeviceStream);
avcsrc->pAVCDeviceStream = nil;
// Forget about the device (don't destroy it; pAVCDeviceController manages it)
avcsrc->pAVCDevice = nil;
GST_DEBUG("Packets enqueued = %llu", avcsrc->packets_enqueued);
GST_DEBUG("Packets dequeued = %llu", avcsrc->packets_dequeued);
while ((buffer = GST_BUFFER (gst_atomic_queue_pop (avcsrc->queue))) != NULL) {
gst_buffer_unref (buffer);
}
return TRUE;
}
static gboolean
gst_avc_src_is_seekable (GstBaseSrc * src)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GST_DEBUG_OBJECT (avcsrc, "is_seekable");
return FALSE;
}
static gboolean
gst_avc_src_unlock (GstBaseSrc * src)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GST_DEBUG_OBJECT (avcsrc, "unlock");
g_mutex_lock (avcsrc->queue_lock);
avcsrc->unlock = TRUE;
g_cond_signal (avcsrc->cond);
g_mutex_unlock (avcsrc->queue_lock);
return TRUE;
}
static gboolean
gst_avc_src_event (GstBaseSrc * src, GstEvent * event)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GST_DEBUG_OBJECT (avcsrc, "event of type '%s'", GST_EVENT_TYPE_NAME(event));
GST_DEBUG("Packets enqueued = %llu, dequeued = %llu",
avcsrc->packets_enqueued, avcsrc->packets_dequeued);
return TRUE;
}
static GstFlowReturn
gst_avc_src_create (GstBaseSrc * src, guint64 offset, guint size,
GstBuffer ** buf)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GstBuffer *buffer;
GST_DEBUG_OBJECT (avcsrc, "create");
g_mutex_lock (avcsrc->queue_lock);
buffer = GST_BUFFER (gst_atomic_queue_pop (avcsrc->queue));
while (buffer == NULL && !avcsrc->unlock) {
g_cond_wait (avcsrc->cond, avcsrc->queue_lock);
buffer = GST_BUFFER (gst_atomic_queue_pop (avcsrc->queue));
}
g_mutex_unlock (avcsrc->queue_lock);
if (avcsrc->unlock) {
if (buffer)
gst_buffer_unref (buffer);
return GST_FLOW_FLUSHING;
}
gst_buffer_set_caps (buffer, GST_PAD_CAPS (avcsrc->srcpad));
*buf = buffer;
avcsrc->packets_dequeued++;
return GST_FLOW_OK;
}
static gboolean
gst_avc_src_query (GstBaseSrc * src, GstQuery * query)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GST_DEBUG_OBJECT (avcsrc, "query");
return TRUE;
}
static gboolean
gst_avc_src_unlock_stop (GstBaseSrc * src)
{
GstAVCSrc *avcsrc = GST_AVC_SRC (src);
GST_DEBUG_OBJECT (avcsrc, "stop");
return TRUE;
}