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GST-Tensordecoder-ov_ep/ext/dc1394/gstdc1394.c
Joan Pau Beltran e28b123608 dc1394src: port to 1.X 
The dc1394src is a PushSrc element for IIDC cameras based on libdc1394.
The implementation from the 0.x series is deffective:
caps negotiation does not work, and some video formats
provided by the camera are not supported.

Refactor the code to port it to 1.X and enhance the support
for the full set of video options of IIDC cameras:

  - The IIDC specification includes a set of camera video modes
    (video format, frame size, and frame rates).
    They do not map perfectly to Gstreamer formats, but those that
    do not match are very rare (if used at all by any camera).
    In addition, although the specification includes a raw format,
    some cameras use mono video formats to capture in Bayer format.
    Map corresponding video modes to Gstreamer formats in capabilities,
    allowing both gray raw and Bayer video formats for mono video modes.

  - The specification includes scalable video modes (Format7),
    where the frame size and rate can be set to arbitrary values
    (within the limits of the camera and the bus transport).
    Allow the use of such mode, using the frame size and rate
    from the negotiatied caps, and set the camera frame rate
    adjusting the packet size as in:
    <http://damien.douxchamps.net/ieee1394/libdc1394/faq/#How_do_I_set_the_frame_rate>

    The scalable modes also allow for a custom ROI offset.
    Support for it can be easily added later using properties.

  - Camera operation using libdc1394 is as follows:

      1. Enumerate cameras on the system and open the camera
         identified the enumeration index or by a GUID (64bit hex code).

      2. Query the video formats supported by the camera.

      3. Configure the camera for the desired video format.

      4. Setup the capture resources for the configured video format
         and start the camera transmission.

      5. Capture frames from the camera and release them when not used.

      6. Stop the camera transmission and clear the capture resources.

      7. Close the camera freeing its resources.

    Do steps 2 and 3 when getting and setting the caps respectively.
    Ideally 4 and 6 would be done when going from PAUSED to PLAYING
    and viceversa, but since caps might not be set yet, the video mode
    is not properly configured leaving the camera in a broken state.
    Hence, setup capture and start transmission in the set caps method,
    and consequently clear the capture and stop the transmission
    when going from PAUSED to READY (instead of PLAYING to PAUSED).
    Symmetrycally, open the camera when going from READY to PAUSED,
    allowing to probe the camera caps in the negotiation stage.
    Implement that using the `start` and `stop` methods of `GstBaseSrc`,
    instead of the `change-state` method of `GstElement`.
    Stop the camera before setting new caps and restarting it again
    to handle caps reconfiguration while in PLAYING (it has no effect
    if the camera is not started).

  - Create buffers copying the bytes of the captured frames.
    Alternatively, the buffers could just wrap the bytes of the frames,
    releasing the frame in the buffer's destroy notify function,
    if all buffers were destroyed before going from PLAYING to PAUSED.

  - No timestamp nor offset is set when creating buffers.
    Timestamping is delegated to the parent class BaseSrc,
    setting `gst_base_src_set_live` TRUE, `gst_base_src_set_format`
    with GST_FORMAT_TIME and `gst_base_src_set_do_timestamp`.
    Captured frames have a timestamp field with the system time
    at the completion of the transmission of the frame,
    but it is not sure that this comes from a monotonic clock,
    and it seems to be left NULL in Windows.

  - Use GUID and unit properties to select the camera to operate on.
    The camera number used in version 0.X does not uniquely identify
    the device (it depends on the set of cameras currently detected).
    Since the GUID is 64bit identifier (same as MAC address),
    handle it with a string property with its hexadecimal representation.
    For practicality, operate on the first camera available if the GUID
    is null (default) and match any camera unit number if unit is -1.
    Alternatively, the GUID could be handed with an unsigned 64 bit
    integer type property, using `0xffffffffffffffff` as default value
    to select the first camera available (it is not a valid GUID value).

  - Keep name `GstDc1394` and prefix `gst_dc1394` as in version 0.X,
    although `GstDC1394Src` and `gst_dc1394_src` are more descriptive.

  - Adjust build files to reenable the compilation of the plugin.

    Remove dc1394 from the list of unported plugins in configure.ac.

    Add the missing flags and libraries to Makefile.
    Use `$()` for variable substitution, as many plugins do,
    although other plugins use `@@` instead.

https://bugzilla.gnome.org/show_bug.cgi?id=763026
2016-06-09 21:47:58 +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
*
* 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.
*
* <refsect2>
* <title>Example launch lines</title>
* |[
* 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.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdc1394.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_parent_class parent_class
G_DEFINE_TYPE (GstDc1394, gst_dc1394, GST_TYPE_PUSH_SRC);
static void gst_dc1394_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_dc1394_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_dc1394_start (GstBaseSrc * bsrc);
static gboolean gst_dc1394_stop (GstBaseSrc * bsrc);
static gboolean gst_dc1394_set_caps (GstBaseSrc * bsrc, GstCaps * caps);
static GstCaps *gst_dc1394_get_caps (GstBaseSrc * bsrc, GstCaps * filter);
static GstFlowReturn gst_dc1394_create (GstPushSrc * psrc, GstBuffer ** buffer);
static void gst_dc1394_set_prop_camera_guid (GstDc1394 * src,
const gchar * guid);
static gchar *gst_dc1394_get_prop_camera_guid (GstDc1394 * src);
static void gst_dc1394_set_prop_camera_unit (GstDc1394 * src, gint unit);
static gint gst_dc1394_get_prop_camera_unit (GstDc1394 * src);
static void gst_dc1394_set_prop_iso_speed (GstDc1394 * src, guint speed);
static guint gst_dc1394_get_prop_iso_speed (GstDc1394 * src);
static void gst_dc1394_set_prop_dma_buffer_size (GstDc1394 * src, guint size);
static guint gst_dc1394_get_prop_dma_buffer_size (GstDc1394 * src);
static gboolean gst_dc1394_open_cam (GstDc1394 * src);
static void gst_dc1394_close_cam (GstDc1394 * src);
static gboolean gst_dc1394_start_cam (GstDc1394 * src);
static gboolean gst_dc1394_stop_cam (GstDc1394 * src);
static gboolean gst_dc1394_set_cam_caps (GstDc1394 * src, GstCaps * caps);
static GstCaps *gst_dc1394_get_cam_caps (GstDc1394 * src);
static GstCaps *gst_dc1394_get_all_caps (void);
static GstCaps *gst_dc1394_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_parse_caps (const GstCaps * caps,
dc1394color_codings_t * color_codings, dc1394framerate_t * rate,
gdouble * rate_decimal, guint * width, guint * height);
static void
gst_dc1394_class_init (GstDc1394Class * 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_set_property;
gobject_class->get_property = gst_dc1394_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_get_all_caps ()));
basesrc_class->start = GST_DEBUG_FUNCPTR (gst_dc1394_start);
basesrc_class->stop = GST_DEBUG_FUNCPTR (gst_dc1394_stop);
basesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_dc1394_set_caps);
basesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_dc1394_get_caps);
pushsrc_class->create = GST_DEBUG_FUNCPTR (gst_dc1394_create);
}
static void
gst_dc1394_init (GstDc1394 * 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_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDc1394 *src;
src = GST_DC1394 (object);
switch (prop_id) {
case PROP_CAMERA_GUID:
g_value_take_string (value, gst_dc1394_get_prop_camera_guid (src));
break;
case PROP_CAMERA_UNIT:
g_value_set_int (value, gst_dc1394_get_prop_camera_unit (src));
break;
case PROP_ISO_SPEED:
g_value_set_enum (value, gst_dc1394_get_prop_iso_speed (src));
break;
case PROP_DMA_BUFFER_SIZE:
g_value_set_uint (value, gst_dc1394_get_prop_dma_buffer_size (src));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dc1394_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstDc1394 *src;
src = GST_DC1394 (object);
switch (prop_id) {
case PROP_CAMERA_GUID:
gst_dc1394_set_prop_camera_guid (src, g_value_get_string (value));
break;
case PROP_CAMERA_UNIT:
gst_dc1394_set_prop_camera_unit (src, g_value_get_int (value));
break;
case PROP_ISO_SPEED:
gst_dc1394_set_prop_iso_speed (src, g_value_get_enum (value));
break;
case PROP_DMA_BUFFER_SIZE:
gst_dc1394_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_start (GstBaseSrc * bsrc)
{
GstDc1394 *src;
src = GST_DC1394 (bsrc);
return gst_dc1394_open_cam (src);
}
static gboolean
gst_dc1394_stop (GstBaseSrc * bsrc)
{
GstDc1394 *src;
src = GST_DC1394 (bsrc);
if (!gst_dc1394_stop_cam (src))
return FALSE;
gst_dc1394_close_cam (src);
return TRUE;
}
static GstCaps *
gst_dc1394_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
{
GstDc1394 *src;
GstCaps *caps, *ret;
src = GST_DC1394 (bsrc);
if (src->camera) {
caps = gst_dc1394_get_cam_caps (src);
} else {
caps = gst_dc1394_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_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstDc1394 *src;
src = GST_DC1394 (bsrc);
return gst_dc1394_stop_cam (src)
&& gst_dc1394_set_cam_caps (src, caps)
&& gst_dc1394_start_cam (src);
}
static GstFlowReturn
gst_dc1394_create (GstPushSrc * psrc, GstBuffer ** obuf)
{
GstDc1394 *src;
GstBuffer *buffer;
dc1394video_frame_t *frame;
dc1394error_t ret;
src = GST_DC1394 (psrc);
buffer = NULL;
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)));
goto 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;
error:
if (buffer)
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
static void
gst_dc1394_set_prop_camera_guid (GstDc1394 * 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_get_prop_camera_guid (GstDc1394 * src)
{
if (src->guid == -1) {
return NULL;
}
return g_strdup_printf ("%016" G_GINT64_MODIFIER "X", src->guid);
}
static void
gst_dc1394_set_prop_camera_unit (GstDc1394 * src, gint unit)
{
src->unit = unit;
}
static gint
gst_dc1394_get_prop_camera_unit (GstDc1394 * src)
{
return src->unit;
}
static void
gst_dc1394_set_prop_iso_speed (GstDc1394 * 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_get_prop_iso_speed (GstDc1394 * 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_set_prop_dma_buffer_size (GstDc1394 * src, guint size)
{
src->dma_buffer_size = size;
}
static guint
gst_dc1394_get_prop_dma_buffer_size (GstDc1394 * src)
{
return src->dma_buffer_size;
}
static gboolean
gst_dc1394_open_cam (GstDc1394 * src)
{
dc1394camera_list_t *cameras;
dc1394error_t ret;
int number;
uint64_t guid;
int unit;
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 (int 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_close_cam (GstDc1394 * 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_start_cam (GstDc1394 * src)
{
dc1394error_t ret;
dc1394switch_t status;
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 (guint 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_stop_cam (GstDc1394 * src)
{
dc1394error_t ret;
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;
}
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_set_cam_caps (GstDc1394 * 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;
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 (guint 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_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_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_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 (guint 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_get_cam_caps (GstDc1394 * 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;
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 (guint 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_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_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_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}
};
caps = gst_caps_new_empty ();
/* First caps for fixed video modes */
for (dc1394video_mode_t 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_build_caps (&video_codings,
&all_rates, width, width, 1, height, height, 1));
}
/* Then caps for Format 7 modes */
gst_caps_append (caps, gst_dc1394_build_caps (&supported_codings,
NULL, 1, G_MAXINT, 1, 1, G_MAXINT, 1));
return caps;
}
static GstCaps *
gst_dc1394_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 };
caps = gst_caps_new_empty ();
for (guint 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 (uint32_t 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 (uint32_t 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 (guint 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_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 (!width) {
} else if (!gst_structure_get_int (structure, "width", &w)) {
goto error;
} else {
*width = w;
}
if (!height) {
} else if (!gst_structure_get_int (structure, "height", &h)) {
goto error;
} else {
*height = h;
}
if (!(rate || rate_decimal)) {
} else if (!gst_structure_get_fraction (structure, "framerate", &num, &den)) {
goto error;
} else 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;
}
if (rate_decimal) {
gst_util_fraction_to_double (num, den, &dec);
*rate_decimal = dec;
}
if (!color_codings) {
} else 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);
}
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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