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gstreamer/ext/dc1394/gstdc1394src.c
Edward Hervey e7724354d9 dc1394src: Remove logically dead code 
buffer would always be NULL in the error case. Simplify and just
return GST_FLOW_ERROR

CID #1417216
2017-11-24 07:57:49 +01:00

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/* GStreamer
* Copyright (C) <2006> Eric Jonas <jonas@mit.edu>
* Copyright (C) <2006> Antoine Tremblay <hexa00@gmail.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 St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-dc1394src
* @title: dc1394src
*
* Source for IIDC (Instrumentation & Industrial Digital Camera) firewire
* cameras. If several cameras are connected to the system, the desired one
* can be selected by its GUID and an optional unit number (most cameras are
* single unit and do not require it). The frame size, rate and format are set
* from capabilities. Although the IIDC specification includes a raw video
* mode, many cameras use mono video modes to capture in Bayer format.
* Thus, for each mono video mode supported by a camera, both gray raw and Bayer
* corresponding video formats are exposed in the capabilities.
* The Bayer pattern is left unspecified.
*
* ## Example launch lines
* |[
* gst-launch-1.0 -v dc1394src ! videoconvert ! autovideosink
* ]| Capture and display frames from the first camera available in the system.
* |[
* gst-launch-1.0 dc1394src guid=00074813004DF937 \
* ! "video/x-bayer,format=gbrg,width=1280,height=960,framerate=15/2" \
* ! bayer2rgb ! videoconvert ! autovideosink
* ]| Capture and display frames from a specific camera in the desired format.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdc1394src.h"
#include <gst/video/video.h>
GST_DEBUG_CATEGORY_STATIC (dc1394_debug);
#define GST_CAT_DEFAULT dc1394_debug
enum
{
PROP_0,
PROP_CAMERA_GUID,
PROP_CAMERA_UNIT,
PROP_ISO_SPEED,
PROP_DMA_BUFFER_SIZE
};
#define GST_TYPE_DC1394_ISO_SPEED (gst_dc1394_iso_speed_get_type ())
static GType
gst_dc1394_iso_speed_get_type (void)
{
static const GEnumValue iso_speeds[] = {
{100, "DC1394 ISO speed 100", "100"},
{200, "DC1394 ISO speed 200", "200"},
{400, "DC1394 ISO speed 400", "400"},
{800, "DC1394 ISO speed 800", "800"},
{1600, "DC1394 ISO speed 1600", "1600"},
{3200, "DC1394 ISO speed 3200", "3200"},
{0, NULL, NULL}
};
static GType type = 0;
if (!type) {
type = g_enum_register_static ("GstDC1394ISOSpeed", iso_speeds);
}
return type;
}
#define gst_dc1394_src_parent_class parent_class
G_DEFINE_TYPE (GstDC1394Src, gst_dc1394_src, GST_TYPE_PUSH_SRC);
static void gst_dc1394_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_dc1394_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_dc1394_src_start (GstBaseSrc * bsrc);
static gboolean gst_dc1394_src_stop (GstBaseSrc * bsrc);
static gboolean gst_dc1394_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps);
static GstCaps *gst_dc1394_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter);
static GstFlowReturn gst_dc1394_src_create (GstPushSrc * psrc,
GstBuffer ** buffer);
static void gst_dc1394_src_set_prop_camera_guid (GstDC1394Src * src,
const gchar * guid);
static gchar *gst_dc1394_src_get_prop_camera_guid (GstDC1394Src * src);
static void gst_dc1394_src_set_prop_camera_unit (GstDC1394Src * src, gint unit);
static gint gst_dc1394_src_get_prop_camera_unit (GstDC1394Src * src);
static void gst_dc1394_src_set_prop_iso_speed (GstDC1394Src * src, guint speed);
static guint gst_dc1394_src_get_prop_iso_speed (GstDC1394Src * src);
static void gst_dc1394_src_set_prop_dma_buffer_size (GstDC1394Src * src,
guint size);
static guint gst_dc1394_src_get_prop_dma_buffer_size (GstDC1394Src * src);
static gboolean gst_dc1394_src_open_cam (GstDC1394Src * src);
static void gst_dc1394_src_close_cam (GstDC1394Src * src);
static gboolean gst_dc1394_src_start_cam (GstDC1394Src * src);
static gboolean gst_dc1394_src_stop_cam (GstDC1394Src * src);
static gboolean gst_dc1394_src_set_cam_caps (GstDC1394Src * src,
GstCaps * caps);
static GstCaps *gst_dc1394_src_get_cam_caps (GstDC1394Src * src);
static GstCaps *gst_dc1394_src_get_all_caps (void);
static GstCaps *gst_dc1394_src_build_caps (const dc1394color_codings_t *
supported_codings, const dc1394framerates_t * supported_rates,
guint width_min, guint width_max, guint width_step, guint height_min,
guint height_max, guint height_step);
static gboolean gst_dc1394_src_parse_caps (const GstCaps * caps,
dc1394color_codings_t * color_codings, dc1394framerate_t * rate,
gdouble * rate_decimal, guint * width, guint * height);
static void
gst_dc1394_src_class_init (GstDC1394SrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseSrcClass *basesrc_class;
GstPushSrcClass *pushsrc_class;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
basesrc_class = GST_BASE_SRC_CLASS (klass);
pushsrc_class = GST_PUSH_SRC_CLASS (klass);
gobject_class->set_property = gst_dc1394_src_set_property;
gobject_class->get_property = gst_dc1394_src_get_property;
g_object_class_install_property (gobject_class, PROP_CAMERA_GUID,
g_param_spec_string ("guid", "Camera GUID",
"The hexadecimal representation of the GUID of the camera"
" (use first camera available if null)",
NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (gobject_class, PROP_CAMERA_UNIT,
g_param_spec_int ("unit", "Camera unit",
"The unit number of the camera (-1 if no unit number is used)",
-1, G_MAXINT, -1,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (gobject_class, PROP_ISO_SPEED,
g_param_spec_enum ("iso", "ISO bandwidth",
"The ISO bandwidth in Mbps",
GST_TYPE_DC1394_ISO_SPEED, 400,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (gobject_class, PROP_DMA_BUFFER_SIZE,
g_param_spec_uint ("dma", "DMA ring buffer size",
"The number of frames in the Direct Memory Access ring buffer",
1, G_MAXUINT, 10,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE |
GST_PARAM_MUTABLE_READY));
gst_element_class_set_static_metadata (element_class,
"1394 IIDC Video Source", "Source/Video",
"libdc1394 based source for IIDC cameras",
"Antoine Tremblay <hexa00@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_dc1394_src_get_all_caps ()));
basesrc_class->start = GST_DEBUG_FUNCPTR (gst_dc1394_src_start);
basesrc_class->stop = GST_DEBUG_FUNCPTR (gst_dc1394_src_stop);
basesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_dc1394_src_set_caps);
basesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_dc1394_src_get_caps);
pushsrc_class->create = GST_DEBUG_FUNCPTR (gst_dc1394_src_create);
}
static void
gst_dc1394_src_init (GstDC1394Src * src)
{
src->guid = -1;
src->unit = -1;
src->iso_speed = DC1394_ISO_SPEED_400;
src->dma_buffer_size = 10;
src->dc1394 = NULL;
src->camera = NULL;
src->caps = NULL;
gst_base_src_set_live (GST_BASE_SRC (src), TRUE);
gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
gst_base_src_set_do_timestamp (GST_BASE_SRC (src), TRUE);
}
static void
gst_dc1394_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDC1394Src *src;
src = GST_DC1394_SRC (object);
switch (prop_id) {
case PROP_CAMERA_GUID:
g_value_take_string (value, gst_dc1394_src_get_prop_camera_guid (src));
break;
case PROP_CAMERA_UNIT:
g_value_set_int (value, gst_dc1394_src_get_prop_camera_unit (src));
break;
case PROP_ISO_SPEED:
g_value_set_enum (value, gst_dc1394_src_get_prop_iso_speed (src));
break;
case PROP_DMA_BUFFER_SIZE:
g_value_set_uint (value, gst_dc1394_src_get_prop_dma_buffer_size (src));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dc1394_src_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstDC1394Src *src;
src = GST_DC1394_SRC (object);
switch (prop_id) {
case PROP_CAMERA_GUID:
gst_dc1394_src_set_prop_camera_guid (src, g_value_get_string (value));
break;
case PROP_CAMERA_UNIT:
gst_dc1394_src_set_prop_camera_unit (src, g_value_get_int (value));
break;
case PROP_ISO_SPEED:
gst_dc1394_src_set_prop_iso_speed (src, g_value_get_enum (value));
break;
case PROP_DMA_BUFFER_SIZE:
gst_dc1394_src_set_prop_dma_buffer_size (src, g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_dc1394_src_start (GstBaseSrc * bsrc)
{
GstDC1394Src *src;
src = GST_DC1394_SRC (bsrc);
return gst_dc1394_src_open_cam (src);
}
static gboolean
gst_dc1394_src_stop (GstBaseSrc * bsrc)
{
GstDC1394Src *src;
src = GST_DC1394_SRC (bsrc);
if (!gst_dc1394_src_stop_cam (src))
return FALSE;
gst_dc1394_src_close_cam (src);
return TRUE;
}
static GstCaps *
gst_dc1394_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
{
GstDC1394Src *src;
GstCaps *caps, *ret;
src = GST_DC1394_SRC (bsrc);
if (src->camera) {
caps = gst_dc1394_src_get_cam_caps (src);
} else {
caps = gst_dc1394_src_get_all_caps ();
}
if (caps && filter) {
ret = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
} else {
ret = caps;
}
return ret;
}
static gboolean
gst_dc1394_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstDC1394Src *src;
src = GST_DC1394_SRC (bsrc);
return gst_dc1394_src_stop_cam (src)
&& gst_dc1394_src_set_cam_caps (src, caps)
&& gst_dc1394_src_start_cam (src);
}
static GstFlowReturn
gst_dc1394_src_create (GstPushSrc * psrc, GstBuffer ** obuf)
{
GstDC1394Src *src;
GstBuffer *buffer = NULL;
dc1394video_frame_t *frame;
dc1394error_t ret;
src = GST_DC1394_SRC (psrc);
ret = dc1394_capture_dequeue (src->camera, DC1394_CAPTURE_POLICY_WAIT,
&frame);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not dequeue frame: %s.", dc1394_error_get_string (ret)));
return GST_FLOW_ERROR;
}
/*
* TODO: We could create the buffer by wrapping the image bytes in the frame
* (enqueing the frame in the notify function) to save the copy operation.
* It will only work if all the buffers are disposed before closing the camera
* when state changes from PAUSED to READY.
*/
buffer = gst_buffer_new_allocate (NULL, frame->image_bytes, NULL);
gst_buffer_fill (buffer, 0, frame->image, frame->image_bytes);
/*
* TODO: There is a field timestamp in the frame structure,
* It is not sure if it could be used as PTS or DTS:
* we are not sure if it comes from a monotonic clock,
* and it seems to be left undefined under MS Windows.
*/
ret = dc1394_capture_enqueue (src->camera, frame);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("Could not enqueue frame: %s.", dc1394_error_get_string (ret)));
}
*obuf = buffer;
return GST_FLOW_OK;
}
static void
gst_dc1394_src_set_prop_camera_guid (GstDC1394Src * src, const gchar * guid)
{
gchar *end;
if (!guid) {
GST_DEBUG_OBJECT (src, "Null camera GUID value: %s.",
"first camera available will be used");
src->guid = -1;
return;
}
errno = 0;
src->guid = g_ascii_strtoull (guid, &end, 16);
if (errno == ERANGE || end == guid || *end != '\0') {
GST_ERROR_OBJECT (src, "Invalid camera GUID value: %s.", guid);
return;
}
}
static gchar *
gst_dc1394_src_get_prop_camera_guid (GstDC1394Src * src)
{
if (src->guid == -1) {
return NULL;
}
return g_strdup_printf ("%016" G_GINT64_MODIFIER "X", src->guid);
}
static void
gst_dc1394_src_set_prop_camera_unit (GstDC1394Src * src, gint unit)
{
src->unit = unit;
}
static gint
gst_dc1394_src_get_prop_camera_unit (GstDC1394Src * src)
{
return src->unit;
}
static void
gst_dc1394_src_set_prop_iso_speed (GstDC1394Src * src, guint speed)
{
switch (speed) {
case 100:
src->iso_speed = DC1394_ISO_SPEED_100;
break;
case 200:
src->iso_speed = DC1394_ISO_SPEED_200;
break;
case 400:
src->iso_speed = DC1394_ISO_SPEED_400;
break;
case 800:
src->iso_speed = DC1394_ISO_SPEED_800;
break;
case 1600:
src->iso_speed = DC1394_ISO_SPEED_1600;
break;
case 3200:
src->iso_speed = DC1394_ISO_SPEED_3200;
break;
default:
GST_ERROR_OBJECT (src, "Invalid ISO speed value: %d.", speed);
}
}
static guint
gst_dc1394_src_get_prop_iso_speed (GstDC1394Src * src)
{
switch (src->iso_speed) {
case DC1394_ISO_SPEED_100:
return 100;
case DC1394_ISO_SPEED_200:
return 200;
case DC1394_ISO_SPEED_400:
return 400;
case DC1394_ISO_SPEED_800:
return 800;
case DC1394_ISO_SPEED_1600:
return 1600;
case DC1394_ISO_SPEED_3200:
return 3200;
default: /* never reached */
return DC1394_ISO_SPEED_MIN - 1;
}
}
static void
gst_dc1394_src_set_prop_dma_buffer_size (GstDC1394Src * src, guint size)
{
src->dma_buffer_size = size;
}
static guint
gst_dc1394_src_get_prop_dma_buffer_size (GstDC1394Src * src)
{
return src->dma_buffer_size;
}
static gboolean
gst_dc1394_src_open_cam (GstDC1394Src * src)
{
dc1394camera_list_t *cameras;
dc1394error_t ret;
int number;
uint64_t guid;
int unit, i;
src->dc1394 = dc1394_new ();
if (!src->dc1394) {
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not initialize dc1394 library."));
goto error;
}
number = -1;
guid = -1;
unit = -1;
ret = dc1394_camera_enumerate (src->dc1394, &cameras);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, LIBRARY, FAILED, (NULL),
("Could not enumerate cameras: %s.", dc1394_error_get_string (ret)));
goto error;
}
for (i = 0; i < cameras->num; i++) {
GST_DEBUG_OBJECT (src, "Camera %2d is %016" G_GINT64_MODIFIER "X %d.",
i, cameras->ids[i].guid, cameras->ids[i].unit);
if ((src->guid == -1 || src->guid == cameras->ids[i].guid) &&
(src->unit == -1 || src->unit == cameras->ids[i].unit)) {
number = i;
guid = cameras->ids[i].guid;
unit = cameras->ids[i].unit;
}
}
dc1394_camera_free_list (cameras);
if (number < 0) {
if (src->guid == -1) {
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
("No cameras found."));
} else {
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
("Camera %016" G_GINT64_MODIFIER "X %d not found.",
src->guid, src->unit));
}
goto error;
}
GST_DEBUG_OBJECT (src, "Open camera %016" G_GINT64_MODIFIER "X %d.",
guid, unit);
src->camera = dc1394_camera_new_unit (src->dc1394, guid, unit);
if (!src->camera) {
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("Could not open camera %016" G_GINT64_MODIFIER "X %d.", guid, unit));
goto error;
}
GST_DEBUG_OBJECT (src,
"Camera %016" G_GINT64_MODIFIER "X %d opened: \"%s %s\".",
src->camera->guid, src->camera->unit,
src->camera->vendor, src->camera->model);
if (src->iso_speed > DC1394_ISO_SPEED_400) {
ret = dc1394_video_set_operation_mode (src->camera,
DC1394_OPERATION_MODE_1394B);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not set 1394B operation mode: %s.",
dc1394_error_get_string (ret)));
goto error;
}
}
ret = dc1394_video_set_iso_speed (src->camera, src->iso_speed);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not set ISO speed %d: %s.", src->iso_speed,
dc1394_error_get_string (ret)));
goto error;
}
return TRUE;
error:
if (src->camera) {
dc1394_camera_free (src->camera);
src->camera = NULL;
}
if (src->dc1394) {
dc1394_free (src->dc1394);
src->dc1394 = NULL;
}
return FALSE;
}
static void
gst_dc1394_src_close_cam (GstDC1394Src * src)
{
GST_DEBUG_OBJECT (src,
"Close camera %016" G_GINT64_MODIFIER "X %d: \"%s %s\".",
src->camera->guid, src->camera->unit,
src->camera->vendor, src->camera->model);
if (src->caps) {
gst_caps_unref (src->caps);
src->caps = NULL;
}
dc1394_camera_free (src->camera);
src->camera = NULL;
dc1394_free (src->dc1394);
src->dc1394 = NULL;
GST_DEBUG_OBJECT (src, "Camera closed.");
}
static gboolean
gst_dc1394_src_start_cam (GstDC1394Src * src)
{
dc1394error_t ret;
dc1394switch_t status;
guint trials;
GST_DEBUG_OBJECT (src, "Setup capture with a DMA buffer of %d frames",
src->dma_buffer_size);
ret = dc1394_capture_setup (src->camera, src->dma_buffer_size,
DC1394_CAPTURE_FLAGS_DEFAULT);
if (ret == DC1394_NO_BANDWIDTH) {
GST_DEBUG_OBJECT (src,
"Could not setup capture with available ISO bandwidth,"
"releasing channels and bandwidth and retrying...");
ret = dc1394_iso_release_all (src->camera);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_WARNING (src, RESOURCE, FAILED, (NULL),
("Could not release ISO channels and bandwidth: %s",
dc1394_error_get_string (ret)));
}
ret = dc1394_capture_setup (src->camera, src->dma_buffer_size,
DC1394_CAPTURE_FLAGS_DEFAULT);
}
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED, (NULL),
("Could not setup capture: %s", dc1394_error_get_string (ret)));
goto error_capture;
}
/*
* TODO: dc1394_capture_setup/stop can start/stop the transmission
* when called with DC1394_CAPTURE_FLAGS_AUTO_ISO in the flags.
* The repeated trials check is a leftover of the original code,
* and might not be needed.
*/
GST_DEBUG_OBJECT (src, "Enable camera transmission.");
ret = dc1394_video_set_transmission (src->camera, DC1394_ON);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED, (NULL),
("Could not set transmission status: %s.",
dc1394_error_get_string (ret)));
goto error_transmission;
}
ret = dc1394_video_get_transmission (src->camera, &status);
for (trials = 10;
(trials > 0) && !(ret == DC1394_SUCCESS && status == DC1394_ON);
trials--) {
GST_DEBUG_OBJECT (src,
"Wait for camera to start transmission (%d trials left).", trials);
g_usleep (50000);
ret = dc1394_video_get_transmission (src->camera, &status);
}
if (!(ret == DC1394_SUCCESS && status == DC1394_ON)) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED, (NULL),
("Could not get positive transmission status: %s.",
dc1394_error_get_string (ret)));
goto error_transmission;
}
GST_DEBUG_OBJECT (src, "Capture successfully started.");
return TRUE;
error_transmission:
ret = dc1394_capture_stop (src->camera);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_WARNING (src, RESOURCE, FAILED, (NULL),
("Could not stop capture: %s.", dc1394_error_get_string (ret)));
}
error_capture:
return FALSE;
}
static gboolean
gst_dc1394_src_stop_cam (GstDC1394Src * src)
{
dc1394error_t ret;
dc1394switch_t status;
guint trials;
/*
* TODO: dc1394_capture_setup/stop can start/stop the transmission
* when called with DC1394_CAPTURE_FLAGS_AUTO_ISO in the flags.
* The repeated trials check is a leftover of the original code,
* and might not be needed.
*/
GST_DEBUG_OBJECT (src, "Disable camera transmission.");
ret = dc1394_video_set_transmission (src->camera, DC1394_OFF);
if (ret != DC1394_SUCCESS) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED, (NULL),
("Could not set transmission status: %s.",
dc1394_error_get_string (ret)));
return FALSE;
}
ret = dc1394_video_get_transmission (src->camera, &status);
for (trials = 10;
(trials > 0) && !(ret == DC1394_SUCCESS && status == DC1394_OFF);
trials--) {
GST_DEBUG_OBJECT (src,
"Wait for camera to stop transmission (%d trials left).", trials);
g_usleep (50000);
ret = dc1394_video_get_transmission (src->camera, &status);
}
if (!(ret == DC1394_SUCCESS && status == DC1394_OFF)) {
GST_WARNING_OBJECT (src,
"Could not get negative transmission status: %s.",
dc1394_error_get_string (ret));
}
GST_DEBUG_OBJECT (src, "Clear capture resources.");
ret = dc1394_capture_stop (src->camera);
if (ret != DC1394_SUCCESS && ret != DC1394_CAPTURE_IS_NOT_SET) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED, (NULL),
("Could not clear capture: %s.", dc1394_error_get_string (ret)));
return FALSE;
}
switch (ret) {
case DC1394_CAPTURE_IS_NOT_SET:
GST_DEBUG_OBJECT (src, "Capture was not set up.");
break;
case DC1394_SUCCESS:
GST_DEBUG_OBJECT (src, "Capture successfully stopped.");
break;
default:
break;
}
return TRUE;
}
static gboolean
gst_dc1394_src_set_cam_caps (GstDC1394Src * src, GstCaps * caps)
{
GstCaps *mode_caps;
gboolean ok, supported;
dc1394video_modes_t supported_modes;
dc1394video_mode_t mode;
dc1394color_codings_t supported_codings;
dc1394color_coding_t coding;
dc1394framerates_t supported_rates;
dc1394framerate_t rate;
double rate_decimal;
uint64_t total_bytes;
uint32_t width, width_step, height, height_step;
guint m, c;
ok = dc1394_video_get_supported_modes (src->camera,
&supported_modes) == DC1394_SUCCESS;
if (!ok) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not get supported modes."));
goto error;
}
supported = FALSE;
for (m = 0; m < supported_modes.num && !supported; m++) {
mode = supported_modes.modes[m];
mode_caps = gst_caps_new_empty ();
if (dc1394_is_video_mode_scalable (mode)) {
ok &= dc1394_format7_get_color_codings (src->camera, mode,
&supported_codings) == DC1394_SUCCESS;
ok &= dc1394_format7_get_max_image_size (src->camera, mode,
&width, &height) == DC1394_SUCCESS;
ok &= dc1394_format7_get_unit_size (src->camera, mode,
&width_step, &height_step) == DC1394_SUCCESS;
} else {
ok &= dc1394_get_color_coding_from_video_mode (src->camera, mode,
&coding) == DC1394_SUCCESS;
ok &= dc1394_get_image_size_from_video_mode (src->camera, mode,
&width, &height) == DC1394_SUCCESS;
ok &= dc1394_video_get_supported_framerates (src->camera, mode,
&supported_rates) == DC1394_SUCCESS;
}
if (!ok) {
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
("Could not get video mode %d parameters.", mode));
} else if (dc1394_is_video_mode_scalable (mode)) {
gst_caps_append (mode_caps,
gst_dc1394_src_build_caps (&supported_codings, NULL,
width_step, width, width_step, height_step, height, height_step));
} else {
supported_codings.num = 1;
supported_codings.codings[0] = coding;
gst_caps_append (mode_caps,
gst_dc1394_src_build_caps (&supported_codings, &supported_rates,
width, width, 1, height, height, 1));
}
supported = gst_caps_can_intersect (caps, mode_caps);
gst_caps_unref (mode_caps);
}
ok = supported && gst_dc1394_src_parse_caps (caps, &supported_codings, &rate,
&rate_decimal, &width, &height);
if (!ok) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Unsupported caps %" GST_PTR_FORMAT, caps));
goto error;
}
GST_DEBUG_OBJECT (src, "Set video mode %d.", mode);
ok = dc1394_video_set_mode (src->camera, mode) == DC1394_SUCCESS;
if (!ok) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not set video mode %d.", mode));
goto error;
}
if (dc1394_is_video_mode_scalable (mode)) {
ok = FALSE;
for (c = 0; c < supported_codings.num && !ok; c++) {
coding = supported_codings.codings[c];
GST_DEBUG_OBJECT (src,
"Try format7 video mode %d with coding %d, size %d %d, and rate %.4f Hz.",
mode, coding, width, height, rate_decimal);
ok = (dc1394_format7_set_color_coding (src->camera, mode,
coding) == DC1394_SUCCESS)
&& (dc1394_format7_set_image_size (src->camera, mode,
width, height) == DC1394_SUCCESS)
&& (dc1394_format7_get_total_bytes (src->camera, mode,
&total_bytes) == DC1394_SUCCESS)
&& (dc1394_format7_set_packet_size (src->camera, mode,
total_bytes * rate_decimal * 0.000125) == DC1394_SUCCESS);
}
} else {
GST_DEBUG_OBJECT (src, "Set fixed video mode %d rate %.4f Hz (%d).",
mode, rate_decimal, rate);
ok = dc1394_video_set_framerate (src->camera, rate) == DC1394_SUCCESS;
}
/* TODO: check feature framerate */
if (!ok) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not set video mode %d parameters.", mode));
goto error;
}
return TRUE;
error:
return FALSE;
}
GstCaps *
gst_dc1394_src_get_cam_caps (GstDC1394Src * src)
{
gboolean ok;
dc1394video_modes_t supported_modes;
dc1394video_mode_t mode;
dc1394color_codings_t supported_codings;
dc1394color_coding_t coding;
dc1394framerates_t supported_rates;
uint32_t width, width_step, height, height_step;
guint m;
if (src->caps)
return gst_caps_ref (src->caps);
ok = dc1394_video_get_supported_modes (src->camera,
&supported_modes) == DC1394_SUCCESS;
if (!ok) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not get supported modes."));
return NULL;
}
src->caps = gst_caps_new_empty ();
for (m = 0; m < supported_modes.num; m++) {
mode = supported_modes.modes[m];
if (dc1394_is_video_mode_scalable (mode)) {
ok &= dc1394_format7_get_color_codings (src->camera, mode,
&supported_codings) == DC1394_SUCCESS;
ok &= dc1394_format7_get_max_image_size (src->camera, mode,
&width, &height) == DC1394_SUCCESS;
ok &= dc1394_format7_get_unit_size (src->camera, mode,
&width_step, &height_step) == DC1394_SUCCESS;
if (!ok) {
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
("Could not get format7 video mode %d parameters.", mode));
} else {
gst_caps_append (src->caps,
gst_dc1394_src_build_caps (&supported_codings, NULL,
width_step, width, width_step, height_step, height,
height_step));
}
} else {
ok &= dc1394_get_image_size_from_video_mode (src->camera, mode,
&width, &height) == DC1394_SUCCESS;
ok &= dc1394_video_get_supported_framerates (src->camera, mode,
&supported_rates) == DC1394_SUCCESS;
ok &= dc1394_get_color_coding_from_video_mode (src->camera, mode,
&coding) == DC1394_SUCCESS;
if (!ok) {
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
("Could not get fixed video mode %d parameters.", mode));
} else {
supported_codings.num = 1;
supported_codings.codings[0] = coding;
gst_caps_append (src->caps,
gst_dc1394_src_build_caps (&supported_codings, &supported_rates,
width, width, 1, height, height, 1));
}
}
}
GST_DEBUG_OBJECT (src, "Camera capabilities: \"%" GST_PTR_FORMAT "\".",
src->caps);
return gst_caps_ref (src->caps);
}
static GstCaps *
gst_dc1394_src_get_all_caps (void)
{
GstCaps *caps;
dc1394color_coding_t coding;
dc1394color_codings_t video_codings;
uint32_t width, height;
const dc1394color_codings_t supported_codings = { 7, {
/* DC1394_COLOR_CODING_RGB16S, DC1394_COLOR_CODING_RGB16, */
DC1394_COLOR_CODING_RGB8, DC1394_COLOR_CODING_YUV444,
DC1394_COLOR_CODING_YUV422, DC1394_COLOR_CODING_YUV411,
/* DC1394_COLOR_CODING_RAW16, DC1394_COLOR_CODING_MONO16S */
DC1394_COLOR_CODING_MONO16, DC1394_COLOR_CODING_RAW8,
DC1394_COLOR_CODING_MONO8}
};
const dc1394framerates_t all_rates = { 8, {
DC1394_FRAMERATE_1_875, DC1394_FRAMERATE_3_75, DC1394_FRAMERATE_7_5,
DC1394_FRAMERATE_15, DC1394_FRAMERATE_30, DC1394_FRAMERATE_60,
DC1394_FRAMERATE_120, DC1394_FRAMERATE_240}
};
dc1394video_mode_t mode;
caps = gst_caps_new_empty ();
/* First caps for fixed video modes */
for (mode = DC1394_VIDEO_MODE_MIN; mode < DC1394_VIDEO_MODE_EXIF; mode++) {
dc1394_get_image_size_from_video_mode (NULL, mode, &width, &height);
dc1394_get_color_coding_from_video_mode (NULL, mode, &coding);
video_codings.codings[0] = coding;
video_codings.num = 1;
gst_caps_append (caps,
gst_dc1394_src_build_caps (&video_codings, &all_rates,
width, width, 1, height, height, 1));
}
/* Then caps for Format 7 modes */
gst_caps_append (caps,
gst_dc1394_src_build_caps (&supported_codings, NULL,
1, G_MAXINT, 1, 1, G_MAXINT, 1));
return caps;
}
static GstCaps *
gst_dc1394_src_build_caps (const dc1394color_codings_t * supported_codings,
const dc1394framerates_t * supported_rates,
uint32_t width_min, uint32_t width_max, uint32_t width_step,
uint32_t height_min, uint32_t height_max, uint32_t height_step)
{
GstCaps *caps;
GstStructure *structure;
GstVideoFormat video_format;
dc1394color_coding_t coding;
dc1394framerate_t rate;
GValue format = { 0 };
GValue formats = { 0 };
GValue width = { 0 };
GValue widths = { 0 };
GValue height = { 0 };
GValue heights = { 0 };
GValue framerate = { 0 };
GValue framerates = { 0 };
guint c, w, h, r;
caps = gst_caps_new_empty ();
for (c = 0; c < supported_codings->num; c++) {
coding = supported_codings->codings[c];
switch (coding) {
case DC1394_COLOR_CODING_MONO8:
video_format = GST_VIDEO_FORMAT_GRAY8;
break;
case DC1394_COLOR_CODING_YUV411:
video_format = GST_VIDEO_FORMAT_IYU1;
break;
case DC1394_COLOR_CODING_YUV422:
video_format = GST_VIDEO_FORMAT_UYVY;
break;
case DC1394_COLOR_CODING_YUV444:
video_format = GST_VIDEO_FORMAT_IYU2;
break;
case DC1394_COLOR_CODING_RGB8:
video_format = GST_VIDEO_FORMAT_RGB;
break;
case DC1394_COLOR_CODING_RAW8:
video_format = GST_VIDEO_FORMAT_UNKNOWN; /* GST_BAYER_FORMAT_XXXX8 */
break;
case DC1394_COLOR_CODING_MONO16:
video_format = GST_VIDEO_FORMAT_GRAY16_BE;
break;
/*
* The following formats do not exist in Gstreamer:
*case DC1394_COLOR_CODING_RGB16: // Unsigned RGB 16 bits per channel
* video_format = GST_VIDEO_FORMAT_RGB48;
* break;
*case DC1394_COLOR_CODING_MONO16S: // Signed grayscale 16 bits
* video_format = GST_VIDEO_FORMAT_GRAY16_BE_SIGNED;
* break;
*case DC1394_COLOR_CODING_RGB16S: // Signed RGB 16 bits per channel
* video_format = GST_VIDEO_FORMAT_RGB48_SIGNED;
* break;
*case DC1394_COLOR_CODING_RAW16: // Raw sensor output (bayer) 16 bits
* video_format = GST_VIDEO_FORMAT_UNKNOWN; // GST_BAYER_FORMAT_XXXX16_BE
* break;
*/
default:
video_format = GST_VIDEO_FORMAT_UNKNOWN;
GST_DEBUG ("unsupported dc1394 video coding %d", coding);
}
if (video_format != GST_VIDEO_FORMAT_UNKNOWN) {
g_value_init (&formats, G_TYPE_STRING);
g_value_set_string (&formats, gst_video_format_to_string (video_format));
structure = gst_structure_new_empty ("video/x-raw");
gst_structure_set_value (structure, "format", &formats);
gst_caps_append_structure (caps, structure);
g_value_unset (&formats);
}
if (coding == DC1394_COLOR_CODING_MONO8 ||
coding == DC1394_COLOR_CODING_RAW8) {
g_value_init (&formats, GST_TYPE_LIST);
g_value_init (&format, G_TYPE_STRING);
g_value_set_static_string (&format, "bggr");
gst_value_list_append_value (&formats, &format);
g_value_set_static_string (&format, "rggb");
gst_value_list_append_value (&formats, &format);
g_value_set_static_string (&format, "grbg");
gst_value_list_append_value (&formats, &format);
g_value_set_static_string (&format, "gbrg");
gst_value_list_append_value (&formats, &format);
structure = gst_structure_new_empty ("video/x-bayer");
gst_structure_set_value (structure, "format", &formats);
gst_caps_append_structure (caps, structure);
g_value_unset (&format);
g_value_unset (&formats);
}
}
if (width_min == width_max) {
g_value_init (&widths, G_TYPE_INT);
g_value_set_int (&widths, width_min);
} else if (width_step == 1) {
g_value_init (&widths, GST_TYPE_INT_RANGE);
gst_value_set_int_range (&widths, width_min, width_max);
} else {
g_value_init (&widths, GST_TYPE_LIST);
g_value_init (&width, G_TYPE_INT);
for (w = width_min; w <= width_max; w += width_step) {
g_value_set_int (&width, w);
gst_value_list_append_value (&widths, &width);
}
g_value_unset (&width);
}
if (height_min == height_max) {
g_value_init (&heights, G_TYPE_INT);
g_value_set_int (&heights, height_min);
} else if (height_step == 1) {
g_value_init (&heights, GST_TYPE_INT_RANGE);
gst_value_set_int_range (&heights, height_min, height_max);
} else {
g_value_init (&heights, GST_TYPE_LIST);
g_value_init (&height, G_TYPE_INT);
for (h = height_min; h <= height_max; h += height_step) {
g_value_set_int (&height, h);
gst_value_list_append_value (&heights, &height);
}
g_value_unset (&height);
}
gst_caps_set_value (caps, "width", &widths);
gst_caps_set_value (caps, "height", &heights);
g_value_unset (&widths);
g_value_unset (&heights);
if (supported_rates) {
g_value_init (&framerates, GST_TYPE_LIST);
g_value_init (&framerate, GST_TYPE_FRACTION);
for (r = 0; r < supported_rates->num; r++) {
rate = supported_rates->framerates[r];
switch (rate) {
case DC1394_FRAMERATE_1_875:
gst_value_set_fraction (&framerate, 240, 128);
break;
case DC1394_FRAMERATE_3_75:
gst_value_set_fraction (&framerate, 240, 64);
break;
case DC1394_FRAMERATE_7_5:
gst_value_set_fraction (&framerate, 240, 32);
break;
case DC1394_FRAMERATE_15:
gst_value_set_fraction (&framerate, 240, 16);
break;
case DC1394_FRAMERATE_30:
gst_value_set_fraction (&framerate, 240, 8);
break;
case DC1394_FRAMERATE_60:
gst_value_set_fraction (&framerate, 240, 4);
break;
case DC1394_FRAMERATE_120:
gst_value_set_fraction (&framerate, 240, 2);
break;
case DC1394_FRAMERATE_240:
gst_value_set_fraction (&framerate, 240, 1);
break;
}
gst_value_list_append_value (&framerates, &framerate);
}
g_value_unset (&framerate);
} else {
g_value_init (&framerates, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range_full (&framerates, 1, G_MAXINT, G_MAXINT, 1);
}
gst_caps_set_value (caps, "framerate", &framerates);
g_value_unset (&framerates);
return caps;
}
static gboolean
gst_dc1394_src_parse_caps (const GstCaps * caps,
dc1394color_codings_t * color_codings,
dc1394framerate_t * rate, double *rate_decimal,
uint32_t * width, uint32_t * height)
{
const GstStructure *structure;
const gchar *format;
gint w, h, num, den;
gdouble dec;
structure = gst_caps_get_structure (caps, 0);
if (!structure)
goto error;
if (!gst_structure_get_int (structure, "width", &w)
|| !gst_structure_get_int (structure, "height", &h))
goto error;
*width = w;
*height = h;
if (!gst_structure_get_fraction (structure, "framerate", &num, &den))
goto error;
if (gst_util_fraction_compare (num, den, 240, 128) <= 0) {
*rate = DC1394_FRAMERATE_1_875;
} else if (gst_util_fraction_compare (num, den, 240, 64) <= 0) {
*rate = DC1394_FRAMERATE_3_75;
} else if (gst_util_fraction_compare (num, den, 240, 32) <= 0) {
*rate = DC1394_FRAMERATE_7_5;
} else if (gst_util_fraction_compare (num, den, 240, 16) <= 0) {
*rate = DC1394_FRAMERATE_15;
} else if (gst_util_fraction_compare (num, den, 240, 8) <= 0) {
*rate = DC1394_FRAMERATE_30;
} else if (gst_util_fraction_compare (num, den, 240, 4) <= 0) {
*rate = DC1394_FRAMERATE_60;
} else if (gst_util_fraction_compare (num, den, 240, 2) <= 0) {
*rate = DC1394_FRAMERATE_120;
} else if (gst_util_fraction_compare (num, den, 240, 1) <= 0) {
*rate = DC1394_FRAMERATE_240;
} else {
*rate = DC1394_FRAMERATE_240;
}
gst_util_fraction_to_double (num, den, &dec);
*rate_decimal = dec;
if (gst_structure_has_name (structure, "video/x-raw")) {
format = gst_structure_get_string (structure, "format");
switch (gst_video_format_from_string (format)) {
case GST_VIDEO_FORMAT_GRAY8:
color_codings->num = 1;
color_codings->codings[0] = DC1394_COLOR_CODING_MONO8;
break;
case GST_VIDEO_FORMAT_IYU1:
color_codings->num = 1;
color_codings->codings[0] = DC1394_COLOR_CODING_YUV411;
break;
case GST_VIDEO_FORMAT_UYVY:
color_codings->num = 1;
color_codings->codings[0] = DC1394_COLOR_CODING_YUV422;
break;
case GST_VIDEO_FORMAT_IYU2:
color_codings->num = 1;
color_codings->codings[0] = DC1394_COLOR_CODING_YUV444;
break;
case GST_VIDEO_FORMAT_RGB:
color_codings->num = 1;
color_codings->codings[0] = DC1394_COLOR_CODING_RGB8;
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
color_codings->num = 1;
color_codings->codings[0] = DC1394_COLOR_CODING_MONO16;
break;
/*
* The following formats do not exist in Gstreamer:
*case GST_VIDEO_FORMAT_RGB48: // Unsigned RGB format 16 bits per channel
* color_codings->num = 1
* color_codings->codings[0] = DC1394_COLOR_CODING_RGB16;
* break;
*case GST_VIDEO_FORMAT_GRAY16_BE_SIGNED: // Signed grayscale format 16 bits
* color_codings->num = 1
* color_codings->codings[0] = DC1394_COLOR_CODING_MONO16S;
* break;
*case GST_VIDEO_FORMAT_RGB48_SIGNED: // Signed RGB format 16 bits per channel
* color_codings->num = 1
* color_codings->codings[0] = DC1394_COLOR_CODING_RGB16S;
* break;
*/
default:
GST_ERROR ("unsupported raw video format %s", format);
goto error;
}
} else if (gst_structure_has_name (structure, "video/x-bayer")) {
/*
* The following formats do not exist in Gstreamer:
*switch (gst_bayer_format_from_string(format)) {
* case GST_BAYER_FORMAT_BGGR8:
* case GST_BAYER_FORMAT_GBRG8:
* case GST_BAYER_FORMAT_GRBG8:
* case GST_BAYER_FORMAT_BGGR8:
* *coding = DC1394_COLOR_CODING_RAW8;
* break;
* case GST_BAYER_FORMAT_BGGR16_BE:
* case GST_BAYER_FORMAT_GBRG16_BE:
* case GST_BAYER_FORMAT_GRBG16_BE:
* case GST_BAYER_FORMAT_BGGR16_BE:
* *coding = DC1394_COLOR_CODING_RAW16;
* break;
* default:
* GST_ERROR("unsupported raw video format %s", format);
* goto error;
*}
*/
color_codings->num = 2;
color_codings->codings[0] = DC1394_COLOR_CODING_RAW8;
color_codings->codings[1] = DC1394_COLOR_CODING_MONO8;
} else {
goto error;
}
return TRUE;
error:
return FALSE;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (dc1394_debug, "dc1394", 0, "DC1394 interface");
return gst_element_register (plugin, "dc1394src", GST_RANK_NONE,
GST_TYPE_DC1394_SRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
dc1394,
"1394 IIDC video source",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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