gstreamer/sys/applemedia/miovideosrc.c

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32 KiB
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/*
* Copyright (C) 2009 Ole André Vadla Ravnås <oravnas@cisco.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "miovideosrc.h"
#include "coremediabuffer.h"
#include <gst/interfaces/propertyprobe.h>
#include <gst/video/video.h>
#include <CoreVideo/CVHostTime.h>
#define DEFAULT_DEVICE_INDEX -1
#define FRAME_QUEUE_SIZE 2
#define FRAME_QUEUE_LOCK(instance) g_mutex_lock (instance->qlock)
#define FRAME_QUEUE_UNLOCK(instance) g_mutex_unlock (instance->qlock)
#define FRAME_QUEUE_WAIT(instance) \
g_cond_wait (instance->qcond, instance->qlock)
#define FRAME_QUEUE_NOTIFY(instance) g_cond_signal (instance->qcond)
#define GST_MIO_REQUIRED_APIS \
(GST_API_CORE_VIDEO | GST_API_CORE_MEDIA | GST_API_MIO)
GST_DEBUG_CATEGORY (gst_mio_video_src_debug);
#define GST_CAT_DEFAULT gst_mio_video_src_debug
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("UYVY") ";"
GST_VIDEO_CAPS_YUV ("YUY2") ";"
"image/jpeg, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", "
"framerate = " GST_VIDEO_FPS_RANGE ";")
);
enum
{
PROP_0,
PROP_DEVICE_UID,
PROP_DEVICE_NAME,
PROP_DEVICE_INDEX
};
typedef gboolean (*GstMIOCallback) (GstMIOVideoSrc * self, gpointer data);
#define GST_MIO_CALLBACK(cb) ((GstMIOCallback) (cb))
static gboolean gst_mio_video_src_open_device (GstMIOVideoSrc * self);
static void gst_mio_video_src_close_device (GstMIOVideoSrc * self);
static gboolean gst_mio_video_src_build_capture_graph_for
(GstMIOVideoSrc * self, GstMIOVideoDevice * device);
static TundraStatus gst_mio_video_src_configure_output_node
(GstMIOVideoSrc * self, TundraGraph * graph, guint node_id);
static void gst_mio_video_src_start_dispatcher (GstMIOVideoSrc * self);
static void gst_mio_video_src_stop_dispatcher (GstMIOVideoSrc * self);
static gpointer gst_mio_video_src_dispatcher_thread (gpointer data);
static gboolean gst_mio_video_src_perform (GstMIOVideoSrc * self,
GstMIOCallback cb, gpointer data);
static gboolean gst_mio_video_src_perform_proxy (gpointer data);
static void gst_mio_video_src_probe_interface_init (gpointer g_iface,
gpointer iface_data);
static void gst_mio_video_src_init_interfaces (GType type);
GST_BOILERPLATE_FULL (GstMIOVideoSrc, gst_mio_video_src, GstPushSrc,
GST_TYPE_PUSH_SRC, gst_mio_video_src_init_interfaces);
static void
gst_mio_video_src_init (GstMIOVideoSrc * self, GstMIOVideoSrcClass * gclass)
{
GstBaseSrc *base_src = GST_BASE_SRC_CAST (self);
guint64 host_freq;
gst_base_src_set_live (base_src, TRUE);
gst_base_src_set_format (base_src, GST_FORMAT_TIME);
host_freq = gst_gdouble_to_guint64 (CVGetHostClockFrequency ());
if (host_freq <= GST_SECOND) {
self->cv_ratio_n = GST_SECOND / host_freq;
self->cv_ratio_d = 1;
} else {
self->cv_ratio_n = 1;
self->cv_ratio_d = host_freq / GST_SECOND;
}
self->queue = g_queue_new ();
self->qlock = g_mutex_new ();
self->qcond = g_cond_new ();
}
static void
gst_mio_video_src_finalize (GObject * object)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (object);
g_cond_free (self->qcond);
g_mutex_free (self->qlock);
g_queue_free (self->queue);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_mio_video_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (object);
switch (prop_id) {
case PROP_DEVICE_UID:
g_value_set_string (value, self->device_uid);
break;
case PROP_DEVICE_NAME:
g_value_set_string (value, self->device_name);
break;
case PROP_DEVICE_INDEX:
g_value_set_int (value, self->device_index);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mio_video_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (object);
switch (prop_id) {
case PROP_DEVICE_UID:
g_free (self->device_uid);
self->device_uid = g_value_dup_string (value);
break;
case PROP_DEVICE_NAME:
g_free (self->device_name);
self->device_name = g_value_dup_string (value);
break;
case PROP_DEVICE_INDEX:
self->device_index = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_mio_video_src_change_state (GstElement * element, GstStateChange transition)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
gst_mio_video_src_start_dispatcher (self);
if (!gst_mio_video_src_perform (self,
GST_MIO_CALLBACK (gst_mio_video_src_open_device), NULL)) {
goto open_failed;
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_mio_video_src_perform (self,
GST_MIO_CALLBACK (gst_mio_video_src_close_device), NULL);
gst_mio_video_src_stop_dispatcher (self);
break;
default:
break;
}
return ret;
/* ERRORS */
open_failed:
{
gst_mio_video_src_stop_dispatcher (self);
return GST_STATE_CHANGE_FAILURE;
}
}
static GstCaps *
gst_mio_video_src_get_caps (GstBaseSrc * basesrc)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
GstCaps *result;
if (self->device != NULL) {
result =
gst_caps_ref (gst_mio_video_device_get_available_caps (self->device));
} else {
result = NULL; /* BaseSrc will return template caps */
}
return result;
}
static gboolean
gst_mio_video_src_do_set_caps (GstMIOVideoSrc * self, GstCaps * caps)
{
TundraStatus status;
if (self->device == NULL)
goto no_device;
if (!gst_mio_video_device_set_caps (self->device, caps))
goto invalid_format;
if (!gst_mio_video_src_build_capture_graph_for (self, self->device))
goto graph_build_error;
status = self->ctx->mio->TundraGraphInitialize (self->graph);
if (status != kTundraSuccess)
goto graph_init_error;
status = self->ctx->mio->TundraGraphStart (self->graph);
if (status != kTundraSuccess)
goto graph_start_error;
return TRUE;
/* ERRORS */
no_device:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("no device"), (NULL));
return FALSE;
}
invalid_format:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("invalid format"), (NULL));
return FALSE;
}
graph_build_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("failed to build capture graph"), (NULL));
return FALSE;
}
graph_init_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("failed to initialize capture graph: %08x", status), (NULL));
return FALSE;
}
graph_start_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("failed to start capture graph: %08x", status), (NULL));
return FALSE;
}
}
static gboolean
gst_mio_video_src_set_caps (GstBaseSrc * basesrc, GstCaps * caps)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
{
gchar *str;
str = gst_caps_to_string (caps);
GST_DEBUG_OBJECT (self, "caps: %s", str);
g_free (str);
}
return gst_mio_video_src_perform (self,
GST_MIO_CALLBACK (gst_mio_video_src_do_set_caps), caps);
}
static gboolean
gst_mio_video_src_start (GstBaseSrc * basesrc)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
self->running = TRUE;
self->prev_offset = GST_BUFFER_OFFSET_NONE;
self->prev_format = NULL;
return TRUE;
}
static gboolean
gst_mio_video_src_do_stop (GstMIOVideoSrc * self)
{
TundraStatus status;
if (self->graph == NULL)
goto nothing_to_stop;
status = self->ctx->mio->TundraGraphStop (self->graph);
if (status != kTundraSuccess)
goto graph_failed_to_stop;
while (!g_queue_is_empty (self->queue))
gst_buffer_unref (g_queue_pop_head (self->queue));
self->ctx->cm->FigFormatDescriptionRelease (self->prev_format);
self->prev_format = NULL;
return TRUE;
nothing_to_stop:
return TRUE;
graph_failed_to_stop:
GST_WARNING_OBJECT (self, "failed to stop capture graph: %d", status);
return FALSE;
}
static gboolean
gst_mio_video_src_stop (GstBaseSrc * basesrc)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
return gst_mio_video_src_perform (self,
GST_MIO_CALLBACK (gst_mio_video_src_do_stop), NULL);
}
static gboolean
gst_mio_video_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
gboolean result = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
if (self->device == NULL)
goto beach;
if (gst_mio_video_device_get_selected_format (self->device) == NULL)
goto beach;
min_latency = max_latency =
gst_mio_video_device_get_duration (self->device);
GST_DEBUG_OBJECT (self, "reporting latency of min %" GST_TIME_FORMAT
" max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
result = TRUE;
break;
}
default:
result = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
break;
}
beach:
return result;
}
static gboolean
gst_mio_video_src_unlock (GstBaseSrc * basesrc)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
FRAME_QUEUE_LOCK (self);
self->running = FALSE;
FRAME_QUEUE_NOTIFY (self);
FRAME_QUEUE_UNLOCK (self);
return TRUE;
}
static gboolean
gst_mio_video_src_unlock_stop (GstBaseSrc * basesrc)
{
return TRUE;
}
static GstFlowReturn
gst_mio_video_src_create (GstPushSrc * pushsrc, GstBuffer ** buf)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (pushsrc);
GstCMApi *cm = self->ctx->cm;
CMFormatDescriptionRef format;
FRAME_QUEUE_LOCK (self);
while (self->running && g_queue_is_empty (self->queue))
FRAME_QUEUE_WAIT (self);
*buf = g_queue_pop_tail (self->queue);
FRAME_QUEUE_UNLOCK (self);
if (G_UNLIKELY (!self->running))
goto shutting_down;
format = cm->CMSampleBufferGetFormatDescription
(GST_CORE_MEDIA_BUFFER (*buf)->sample_buf);
if (self->prev_format != NULL &&
!cm->CMFormatDescriptionEqual (format, self->prev_format)) {
goto unexpected_format;
}
cm->FigFormatDescriptionRelease (self->prev_format);
self->prev_format = cm->FigFormatDescriptionRetain (format);
if (self->prev_offset == GST_BUFFER_OFFSET_NONE ||
GST_BUFFER_OFFSET (*buf) - self->prev_offset != 1) {
GST_BUFFER_FLAG_SET (*buf, GST_BUFFER_FLAG_DISCONT);
}
self->prev_offset = GST_BUFFER_OFFSET (*buf);
return GST_FLOW_OK;
/* ERRORS */
shutting_down:
{
if (*buf != NULL) {
gst_buffer_unref (*buf);
*buf = NULL;
}
return GST_FLOW_WRONG_STATE;
}
unexpected_format:
{
GST_ELEMENT_ERROR (self, RESOURCE, READ,
("capture format changed unexpectedly"),
("another application likely reconfigured the device"));
if (*buf != NULL) {
gst_buffer_unref (*buf);
*buf = NULL;
}
return GST_FLOW_ERROR;
}
}
static gboolean
gst_mio_video_src_open_device (GstMIOVideoSrc * self)
{
GError *error = NULL;
GList *devices = NULL, *walk;
guint device_idx;
self->ctx = gst_core_media_ctx_new (GST_API_CORE_VIDEO | GST_API_CORE_MEDIA
| GST_API_MIO, &error);
if (error != NULL)
goto api_error;
devices = gst_mio_video_device_list_create (self->ctx);
if (devices == NULL)
goto no_devices;
for (walk = devices, device_idx = 0; walk != NULL; walk = walk->next) {
GstMIOVideoDevice *device = walk->data;
gboolean match;
if (self->device_uid != NULL) {
match = g_ascii_strcasecmp (gst_mio_video_device_get_uid (device),
self->device_uid) == 0;
} else if (self->device_name != NULL) {
match = g_ascii_strcasecmp (gst_mio_video_device_get_name (device),
self->device_name) == 0;
} else if (self->device_index >= 0) {
match = device_idx == self->device_index;
} else {
match = TRUE; /* pick the first entry */
}
if (self->device != NULL)
match = FALSE;
GST_DEBUG_OBJECT (self, "%c device[%u] = handle: %d name: '%s' uid: '%s'",
(match) ? '*' : '-', device_idx,
gst_mio_video_device_get_handle (device),
gst_mio_video_device_get_name (device),
gst_mio_video_device_get_uid (device));
/*gst_mio_video_device_print_debug_info (device); */
if (match)
self->device = g_object_ref (device);
device_idx++;
}
if (self->device == NULL)
goto no_such_device;
if (!gst_mio_video_device_open (self->device))
goto device_busy_or_gone;
gst_mio_video_device_list_destroy (devices);
return TRUE;
/* ERRORS */
api_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("API error"),
("%s", error->message));
g_clear_error (&error);
goto any_error;
}
no_devices:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("no video capture devices found"), (NULL));
goto any_error;
}
no_such_device:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("specified video capture device not found"), (NULL));
goto any_error;
}
device_busy_or_gone:
{
GST_ELEMENT_ERROR (self, RESOURCE, BUSY,
("failed to start capture (device already in use or gone)"), (NULL));
goto any_error;
}
any_error:
{
if (devices != NULL) {
gst_mio_video_device_list_destroy (devices);
}
if (self->ctx != NULL) {
g_object_unref (self->ctx);
self->ctx = NULL;
}
return FALSE;
}
}
static void
gst_mio_video_src_close_device (GstMIOVideoSrc * self)
{
self->ctx->mio->TundraGraphUninitialize (self->graph);
self->ctx->mio->TundraGraphRelease (self->graph);
self->graph = NULL;
gst_mio_video_device_close (self->device);
g_object_unref (self->device);
self->device = NULL;
g_object_unref (self->ctx);
self->ctx = NULL;
}
#define CHECK_TUNDRA_ERROR(fn) \
if (status != kTundraSuccess) { \
last_function_name = fn; \
goto tundra_error; \
}
static gboolean
gst_mio_video_src_build_capture_graph_for (GstMIOVideoSrc * self,
GstMIOVideoDevice * device)
{
GstMIOApi *mio = self->ctx->mio;
const gchar *last_function_name;
TundraGraph *graph = NULL;
TundraTargetSpec spec = { 0, };
TundraUnitID input_node = -1;
gpointer input_info;
TundraObjectID device_handle;
TundraUnitID sync_node = -1;
guint8 is_master;
guint sync_direction;
TundraUnitID output_node = -1;
TundraStatus status;
const gint node_id_input = 1;
const gint node_id_sync = 22;
const gint node_id_output = 16;
/*
* Graph
*/
status = mio->TundraGraphCreate (kCFAllocatorDefault, &graph);
CHECK_TUNDRA_ERROR ("TundraGraphCreate");
/*
* Node: input
*/
spec.name = kTundraUnitInput;
spec.scope = kTundraScopeDAL;
spec.vendor = kTundraVendorApple;
status = mio->TundraGraphCreateNode (graph, node_id_input, 0, 0, &spec, 0,
&input_node);
CHECK_TUNDRA_ERROR ("TundraGraphCreateNode(input)");
/* store node info for setting clock provider */
input_info = NULL;
status = mio->TundraGraphGetNodeInfo (graph, input_node, 0, 0, 0, 0,
&input_info);
CHECK_TUNDRA_ERROR ("TundraGraphGetNodeInfo(input)");
/* set device handle */
device_handle = gst_mio_video_device_get_handle (device);
status = mio->TundraGraphSetProperty (graph, node_id_input, 0,
kTundraInputPropertyDeviceID, 0, 0, &device_handle,
sizeof (device_handle));
CHECK_TUNDRA_ERROR ("TundraGraphSetProperty(input, DeviceID)");
/*
* Node: sync
*/
spec.name = kTundraUnitSync;
spec.scope = kTundraScopeVSyn;
status = mio->TundraGraphCreateNode (graph, node_id_sync, 0, 0, &spec, 0,
&sync_node);
CHECK_TUNDRA_ERROR ("TundraGraphCreateNode(sync)");
status = mio->TundraGraphSetProperty (graph, node_id_sync, 0,
kTundraSyncPropertyClockProvider, 0, 0, &input_info, sizeof (input_info));
CHECK_TUNDRA_ERROR ("TundraGraphSetProperty(sync, ClockProvider)");
is_master = TRUE;
status = mio->TundraGraphSetProperty (graph, node_id_sync, 0,
kTundraSyncPropertyMasterSynchronizer, 0, 0,
&is_master, sizeof (is_master));
CHECK_TUNDRA_ERROR ("TundraGraphSetProperty(sync, MasterSynchronizer)");
sync_direction = 0;
status = mio->TundraGraphSetProperty (graph, node_id_sync, 0,
kTundraSyncPropertySynchronizationDirection, 0, 0,
&sync_direction, sizeof (sync_direction));
CHECK_TUNDRA_ERROR ("TundraGraphSetProperty(sync, SynchronizationDirection)");
/*
* Node: output
*/
spec.name = kTundraUnitOutput;
spec.scope = kTundraScope2PRC;
status = mio->TundraGraphCreateNode (graph, node_id_output, 0, 0, &spec, 0,
&output_node);
CHECK_TUNDRA_ERROR ("TundraGraphCreateNode(output)");
status = gst_mio_video_src_configure_output_node (self, graph,
node_id_output);
CHECK_TUNDRA_ERROR ("TundraGraphSetProperty(output, Delegate)");
/*
* Connect the nodes
*/
status = mio->TundraGraphConnectNodeInput (graph, input_node, 0,
sync_node, 0);
CHECK_TUNDRA_ERROR ("TundraGraphConnectNodeInput(input, sync)");
status = mio->TundraGraphConnectNodeInput (graph, sync_node, 0,
output_node, 0);
CHECK_TUNDRA_ERROR ("TundraGraphConnectNodeInput(sync, output)");
self->graph = graph;
return TRUE;
tundra_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("%s failed (status=%d)", last_function_name, (gint) status), (NULL));
goto any_error;
}
any_error:
{
mio->TundraGraphRelease (graph);
return FALSE;
}
}
static GstClockTime
gst_mio_video_src_get_timestamp (GstMIOVideoSrc * self, CMSampleBufferRef sbuf)
{
GstClock *clock;
GstClockTime base_time;
GstClockTime timestamp;
GST_OBJECT_LOCK (self);
if ((clock = GST_ELEMENT_CLOCK (self)) != NULL) {
gst_object_ref (clock);
}
base_time = GST_ELEMENT_CAST (self)->base_time;
GST_OBJECT_UNLOCK (self);
if (G_UNLIKELY (clock == NULL))
goto no_clock;
timestamp = GST_CLOCK_TIME_NONE;
/*
* If the current clock is GstSystemClock, we know that it's using the
* CoreAudio/CoreVideo clock. As such we may use the timestamp attached
* to the CMSampleBuffer.
*/
if (G_TYPE_FROM_INSTANCE (clock) == GST_TYPE_SYSTEM_CLOCK) {
CFNumberRef number;
UInt64 ht;
number = self->ctx->cm->CMGetAttachment (sbuf,
*self->ctx->mio->kTundraSampleBufferAttachmentKey_HostTime, NULL);
if (number != NULL && CFNumberGetValue (number, kCFNumberSInt64Type, &ht)) {
timestamp = gst_util_uint64_scale_int (ht,
self->cv_ratio_n, self->cv_ratio_d);
}
}
if (!GST_CLOCK_TIME_IS_VALID (timestamp)) {
timestamp = gst_clock_get_time (clock);
}
if (timestamp > base_time)
timestamp -= base_time;
else
timestamp = 0;
gst_object_unref (clock);
return timestamp;
no_clock:
return GST_CLOCK_TIME_NONE;
}
static TundraStatus
gst_mio_video_src_output_render (gpointer instance, gpointer unk1,
gpointer unk2, gpointer unk3, CMSampleBufferRef sample_buf)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (instance);
GstBuffer *buf;
CFNumberRef number;
UInt32 seq;
buf = gst_core_media_buffer_new (self->ctx, sample_buf);
if (G_UNLIKELY (buf == NULL))
goto buffer_creation_failed;
number = self->ctx->cm->CMGetAttachment (sample_buf,
*self->ctx->mio->kTundraSampleBufferAttachmentKey_SequenceNumber, NULL);
if (number != NULL && CFNumberGetValue (number, kCFNumberSInt32Type, &seq)) {
GST_BUFFER_OFFSET (buf) = seq;
GST_BUFFER_OFFSET_END (buf) = seq + 1;
}
GST_BUFFER_TIMESTAMP (buf) = gst_mio_video_src_get_timestamp (self,
sample_buf);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
GST_BUFFER_DURATION (buf) =
gst_mio_video_device_get_duration (self->device);
}
FRAME_QUEUE_LOCK (self);
if (g_queue_get_length (self->queue) == FRAME_QUEUE_SIZE)
gst_buffer_unref (g_queue_pop_tail (self->queue));
g_queue_push_head (self->queue, buf);
FRAME_QUEUE_NOTIFY (self);
FRAME_QUEUE_UNLOCK (self);
return kTundraSuccess;
buffer_creation_failed:
GST_WARNING_OBJECT (instance, "failed to create buffer");
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_initialize (gpointer instance)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_uninitialize (gpointer instance)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_start (gpointer instance)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_stop (gpointer instance)
{
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_reset (gpointer instance)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_deallocate (gpointer instance)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
return kTundraSuccess;
}
static gboolean
gst_mio_video_src_output_can_render_now (gpointer instance, guint * unk)
{
if (unk != NULL)
*unk = 0;
return TRUE;
}
static CFArrayRef
gst_mio_video_src_output_available_formats (gpointer instance,
gboolean ensure_only)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC (instance);
CMFormatDescriptionRef format_desc;
GST_DEBUG_OBJECT (self, "%s: ensure_only=%d", G_STRFUNC, ensure_only);
if (ensure_only)
return NULL;
g_assert (self->device != NULL);
format_desc = gst_mio_video_device_get_selected_format (self->device);
g_assert (format_desc != NULL);
return CFArrayCreate (kCFAllocatorDefault, (const void **) &format_desc, 1,
&kCFTypeArrayCallBacks);
}
static TundraStatus
gst_mio_video_src_output_copy_clock (gpointer instance)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
return kTundraSuccess;
}
static TundraStatus
gst_mio_video_src_output_get_property_info (gpointer instance, guint prop_id)
{
GST_DEBUG_OBJECT (instance, "%s: prop_id=%u", G_STRFUNC, prop_id);
if (prop_id == kTundraInputUnitProperty_SourcePath)
return kTundraSuccess;
return kTundraNotSupported;
}
static TundraStatus
gst_mio_video_src_output_get_property (gpointer instance, guint prop_id)
{
GST_DEBUG_OBJECT (instance, "%s", G_STRFUNC);
if (prop_id == kTundraInputUnitProperty_SourcePath)
return kTundraSuccess;
return kTundraNotSupported;
}
static TundraStatus
gst_mio_video_src_output_set_property (gpointer instance, guint prop_id)
{
GST_DEBUG_OBJECT (instance, "%s: prop_id=%u", G_STRFUNC, prop_id);
if (prop_id == kTundraInputUnitProperty_SourcePath)
return kTundraSuccess;
return kTundraNotSupported;
}
static TundraStatus
gst_mio_video_src_configure_output_node (GstMIOVideoSrc * self,
TundraGraph * graph, guint node_id)
{
TundraStatus status;
TundraOutputDelegate d = { 0, };
d.unk1 = 2;
d.instance = self;
d.Render = gst_mio_video_src_output_render;
d.Initialize = gst_mio_video_src_output_initialize;
d.Uninitialize = gst_mio_video_src_output_uninitialize;
d.Start = gst_mio_video_src_output_start;
d.Stop = gst_mio_video_src_output_stop;
d.Reset = gst_mio_video_src_output_reset;
d.Deallocate = gst_mio_video_src_output_deallocate;
d.CanRenderNow = gst_mio_video_src_output_can_render_now;
d.AvailableFormats = gst_mio_video_src_output_available_formats;
d.CopyClock = gst_mio_video_src_output_copy_clock;
d.GetPropertyInfo = gst_mio_video_src_output_get_property_info;
d.GetProperty = gst_mio_video_src_output_get_property;
d.SetProperty = gst_mio_video_src_output_set_property;
status = self->ctx->mio->TundraGraphSetProperty (graph, node_id, 0,
kTundraOutputPropertyDelegate, 0, 0, &d, sizeof (d));
return status;
}
static void
gst_mio_video_src_start_dispatcher (GstMIOVideoSrc * self)
{
g_assert (self->dispatcher_ctx == NULL && self->dispatcher_loop == NULL);
g_assert (self->dispatcher_thread == NULL);
self->dispatcher_ctx = g_main_context_new ();
self->dispatcher_loop = g_main_loop_new (self->dispatcher_ctx, TRUE);
self->dispatcher_thread =
g_thread_create (gst_mio_video_src_dispatcher_thread, self, TRUE, NULL);
}
static void
gst_mio_video_src_stop_dispatcher (GstMIOVideoSrc * self)
{
g_assert (self->dispatcher_ctx != NULL && self->dispatcher_loop != NULL);
g_assert (self->dispatcher_thread != NULL);
g_main_loop_quit (self->dispatcher_loop);
g_thread_join (self->dispatcher_thread);
self->dispatcher_thread = NULL;
g_main_loop_unref (self->dispatcher_loop);
self->dispatcher_loop = NULL;
g_main_context_unref (self->dispatcher_ctx);
self->dispatcher_ctx = NULL;
}
static gpointer
gst_mio_video_src_dispatcher_thread (gpointer data)
{
GstMIOVideoSrc *self = data;
g_main_loop_run (self->dispatcher_loop);
return NULL;
}
typedef struct
{
GstMIOVideoSrc *self;
GstMIOCallback callback;
gpointer data;
gboolean result;
GMutex *mutex;
GCond *cond;
gboolean finished;
} GstMIOPerformCtx;
static gboolean
gst_mio_video_src_perform (GstMIOVideoSrc * self, GstMIOCallback cb,
gpointer data)
{
GstMIOPerformCtx ctx;
GSource *source;
ctx.self = self;
ctx.callback = cb;
ctx.data = data;
ctx.result = FALSE;
ctx.mutex = g_mutex_new ();
ctx.cond = g_cond_new ();
ctx.finished = FALSE;
source = g_idle_source_new ();
g_source_set_callback (source, gst_mio_video_src_perform_proxy, &ctx, NULL);
g_source_attach (source, self->dispatcher_ctx);
g_mutex_lock (ctx.mutex);
while (!ctx.finished)
g_cond_wait (ctx.cond, ctx.mutex);
g_mutex_unlock (ctx.mutex);
g_source_destroy (source);
g_source_unref (source);
g_cond_free (ctx.cond);
g_mutex_free (ctx.mutex);
return ctx.result;
}
static gboolean
gst_mio_video_src_perform_proxy (gpointer data)
{
GstMIOPerformCtx *ctx = data;
ctx->result = ctx->callback (ctx->self, ctx->data);
g_mutex_lock (ctx->mutex);
ctx->finished = TRUE;
g_cond_signal (ctx->cond);
g_mutex_unlock (ctx->mutex);
return FALSE;
}
static const GList *
gst_mio_video_src_probe_get_properties (GstPropertyProbe * probe)
{
static gsize init_value = 0;
if (g_once_init_enter (&init_value)) {
GObjectClass *klass;
GList *props = NULL;
klass = G_OBJECT_GET_CLASS (probe);
props = g_list_append (props,
g_object_class_find_property (klass, "device-uid"));
props = g_list_append (props,
g_object_class_find_property (klass, "device-name"));
props = g_list_append (props,
g_object_class_find_property (klass, "device-index"));
g_once_init_leave (&init_value, GPOINTER_TO_SIZE (props));
}
return GSIZE_TO_POINTER (init_value);
}
static GValueArray *
gst_mio_video_src_probe_get_values (GstPropertyProbe * probe, guint prop_id,
const GParamSpec * pspec)
{
GValueArray *values;
GstCoreMediaCtx *ctx = NULL;
GError *error = NULL;
GList *devices = NULL, *walk;
guint device_idx;
values = g_value_array_new (3);
ctx = gst_core_media_ctx_new (GST_MIO_REQUIRED_APIS, &error);
if (error != NULL)
goto beach;
devices = gst_mio_video_device_list_create (ctx);
if (devices == NULL)
goto beach;
for (walk = devices, device_idx = 0; walk != NULL; walk = walk->next) {
GstMIOVideoDevice *device = walk->data;
GValue value = { 0, };
switch (prop_id) {
case PROP_DEVICE_UID:
case PROP_DEVICE_NAME:
{
const gchar *str;
if (prop_id == PROP_DEVICE_UID)
str = gst_mio_video_device_get_uid (device);
else
str = gst_mio_video_device_get_name (device);
g_value_init (&value, G_TYPE_STRING);
g_value_set_string (&value, str);
break;
}
case PROP_DEVICE_INDEX:
{
g_value_init (&value, G_TYPE_INT);
g_value_set_int (&value, device_idx);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
goto beach;
}
g_value_array_append (values, &value);
g_value_unset (&value);
device_idx++;
}
beach:
if (devices != NULL)
gst_mio_video_device_list_destroy (devices);
if (ctx != NULL)
g_object_unref (ctx);
g_clear_error (&error);
return values;
}
static void
gst_mio_video_src_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"Video Source (MIO)", "Source/Video",
"Reads frames from a Mac OS X MIO device",
"Ole André Vadla Ravnås <oravnas@cisco.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
static void
gst_mio_video_src_class_init (GstMIOVideoSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
GstPushSrcClass *gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
gobject_class->finalize = gst_mio_video_src_finalize;
gobject_class->get_property = gst_mio_video_src_get_property;
gobject_class->set_property = gst_mio_video_src_set_property;
gstelement_class->change_state = gst_mio_video_src_change_state;
gstbasesrc_class->get_caps = gst_mio_video_src_get_caps;
gstbasesrc_class->set_caps = gst_mio_video_src_set_caps;
gstbasesrc_class->start = gst_mio_video_src_start;
gstbasesrc_class->stop = gst_mio_video_src_stop;
gstbasesrc_class->query = gst_mio_video_src_query;
gstbasesrc_class->unlock = gst_mio_video_src_unlock;
gstbasesrc_class->unlock_stop = gst_mio_video_src_unlock_stop;
gstpushsrc_class->create = gst_mio_video_src_create;
g_object_class_install_property (gobject_class, PROP_DEVICE_UID,
g_param_spec_string ("device-uid", "Device UID",
"Unique ID of the desired device", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
g_param_spec_string ("device-name", "Device Name",
"Name of the desired device", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEVICE_INDEX,
g_param_spec_int ("device-index", "Device Index",
"Zero-based device index of the desired device",
-1, G_MAXINT, DEFAULT_DEVICE_INDEX,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
GST_DEBUG_CATEGORY_INIT (gst_mio_video_src_debug, "miovideosrc",
0, "Mac OS X CoreMedia video source");
}
static void
gst_mio_video_src_init_interfaces (GType type)
{
static const GInterfaceInfo probe_info = {
gst_mio_video_src_probe_interface_init,
NULL,
NULL
};
g_type_add_interface_static (type, GST_TYPE_PROPERTY_PROBE, &probe_info);
}
static void
gst_mio_video_src_probe_interface_init (gpointer g_iface, gpointer iface_data)
{
GstPropertyProbeInterface *iface = g_iface;
iface->get_properties = gst_mio_video_src_probe_get_properties;
iface->get_values = gst_mio_video_src_probe_get_values;
}