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gstreamer/ext/raw1394/gstdv1394src.c
Sebastian Dröge f4b5107796 Improve and fix LATENCY query handling 
This now follows the design docs everywhere, especially the maximum latency
handling.

https://bugzilla.gnome.org/show_bug.cgi?id=744106
2015-02-11 13:53:02 +01:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* <2000> Daniel Fischer <dan@f3c.com>
* <2004> Wim Taymans <wim@fluendo.com>
* <2006> Zaheer Abbas Merali <zaheerabbas at merali dot org>
*
* 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-dv1394src
*
* Read DV (digital video) data from firewire port.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 dv1394src ! queue ! dvdemux name=d ! queue ! dvdec ! xvimagesink d. ! queue ! alsasink
* ]| This pipeline captures from the firewire port and displays it (might need
* format converters for audio/video).
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <libavc1394/avc1394.h>
#include <libavc1394/avc1394_vcr.h>
#include <libavc1394/rom1394.h>
#include <libraw1394/raw1394.h>
#ifdef HAVE_LIBIEC61883
#include <libiec61883/iec61883.h>
#endif
#include <gst/gst.h>
#include "gstdv1394src.h"
#include "gst1394probe.h"
#include "gst1394clock.h"
#define CONTROL_STOP 'S' /* stop the select call */
#define CONTROL_SOCKETS(src) src->control_sock
#define WRITE_SOCKET(src) src->control_sock[1]
#define READ_SOCKET(src) src->control_sock[0]
#define SEND_COMMAND(src, command) \
G_STMT_START { \
int G_GNUC_UNUSED _res; unsigned char c; c = command; \
_res = write (WRITE_SOCKET(src), &c, 1); \
} G_STMT_END
#define READ_COMMAND(src, command, res) \
G_STMT_START { \
res = read(READ_SOCKET(src), &command, 1); \
} G_STMT_END
GST_DEBUG_CATEGORY_STATIC (dv1394src_debug);
#define GST_CAT_DEFAULT (dv1394src_debug)
#define PAL_FRAMESIZE 144000
#define PAL_FRAMERATE 25
#define NTSC_FRAMESIZE 120000
#define NTSC_FRAMERATE 30
enum
{
SIGNAL_FRAME_DROPPED,
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_PORT -1
#define DEFAULT_CHANNEL 63
#define DEFAULT_CONSECUTIVE 1
#define DEFAULT_SKIP 0
#define DEFAULT_DROP_INCOMPLETE TRUE
#define DEFAULT_USE_AVC TRUE
#define DEFAULT_GUID 0
enum
{
PROP_0,
PROP_PORT,
PROP_CHANNEL,
PROP_CONSECUTIVE,
PROP_SKIP,
PROP_DROP_INCOMPLETE,
PROP_USE_AVC,
PROP_GUID,
PROP_DEVICE_NAME
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-dv, "
"format = (string) { NTSC, PAL }, " "systemstream = (boolean) true")
);
static void gst_dv1394src_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static void gst_dv1394src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_dv1394src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_dv1394src_dispose (GObject * object);
static GstClock *gst_dv1394src_provide_clock (GstElement * element);
static GstStateChangeReturn gst_dv1394_src_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_dv1394src_start (GstBaseSrc * bsrc);
static gboolean gst_dv1394src_stop (GstBaseSrc * bsrc);
static gboolean gst_dv1394src_unlock (GstBaseSrc * bsrc);
static GstFlowReturn gst_dv1394src_create (GstPushSrc * psrc, GstBuffer ** buf);
static gboolean gst_dv1394src_query (GstBaseSrc * src, GstQuery * query);
static void gst_dv1394src_update_device_name (GstDV1394Src * src);
#define gst_dv1394src_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstDV1394Src, gst_dv1394src, GST_TYPE_PUSH_SRC,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER,
gst_dv1394src_uri_handler_init));
static guint gst_dv1394src_signals[LAST_SIGNAL] = { 0 };
static void
gst_dv1394src_class_init (GstDV1394SrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpushsrc_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
gobject_class->set_property = gst_dv1394src_set_property;
gobject_class->get_property = gst_dv1394src_get_property;
gobject_class->dispose = gst_dv1394src_dispose;
gstelement_class->provide_clock = gst_dv1394src_provide_clock;
gstelement_class->change_state = gst_dv1394_src_change_state;
gst_dv1394src_signals[SIGNAL_FRAME_DROPPED] =
g_signal_new ("frame-dropped", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDV1394SrcClass, frame_dropped),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "Port", "Port number (-1 automatic)",
-1, 16, DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CHANNEL,
g_param_spec_int ("channel", "Channel", "Channel number for listening",
0, 64, DEFAULT_CHANNEL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CONSECUTIVE,
g_param_spec_int ("consecutive", "consecutive frames",
"send n consecutive frames after skipping", 1, G_MAXINT,
DEFAULT_CONSECUTIVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SKIP,
g_param_spec_int ("skip", "skip frames", "skip n frames",
0, G_MAXINT, DEFAULT_SKIP,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DROP_INCOMPLETE,
g_param_spec_boolean ("drop-incomplete", "drop incomplete",
"drop incomplete frames", DEFAULT_DROP_INCOMPLETE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_USE_AVC,
g_param_spec_boolean ("use-avc", "Use AV/C", "Use AV/C VTR control",
DEFAULT_USE_AVC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_GUID,
g_param_spec_uint64 ("guid", "GUID",
"select one of multiple DV devices by its GUID. use a hexadecimal "
"like 0xhhhhhhhhhhhhhhhh. (0 = no guid)", 0, G_MAXUINT64,
DEFAULT_GUID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstDV1394Src:device-name:
*
* Descriptive name of the currently opened device
*/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DEVICE_NAME,
g_param_spec_string ("device-name", "device name",
"user-friendly name of the device", "Default",
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gstbasesrc_class->negotiate = NULL;
gstbasesrc_class->start = gst_dv1394src_start;
gstbasesrc_class->stop = gst_dv1394src_stop;
gstbasesrc_class->unlock = gst_dv1394src_unlock;
gstbasesrc_class->query = gst_dv1394src_query;
gstpushsrc_class->create = gst_dv1394src_create;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_set_static_metadata (gstelement_class,
"Firewire (1394) DV video source", "Source/Video",
"Source for DV video data from firewire port",
"Erik Walthinsen <omega@temple-baptist.com>, "
"Daniel Fischer <dan@f3c.com>, " "Wim Taymans <wim@fluendo.com>, "
"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
GST_DEBUG_CATEGORY_INIT (dv1394src_debug, "dv1394src", 0,
"DV firewire source");
}
static void
gst_dv1394src_init (GstDV1394Src * dv1394src)
{
GstPad *srcpad = GST_BASE_SRC_PAD (dv1394src);
gst_base_src_set_live (GST_BASE_SRC (dv1394src), TRUE);
gst_base_src_set_format (GST_BASE_SRC (dv1394src), GST_FORMAT_TIME);
gst_base_src_set_do_timestamp (GST_BASE_SRC (dv1394src), TRUE);
gst_pad_use_fixed_caps (srcpad);
dv1394src->port = DEFAULT_PORT;
dv1394src->channel = DEFAULT_CHANNEL;
dv1394src->consecutive = DEFAULT_CONSECUTIVE;
dv1394src->skip = DEFAULT_SKIP;
dv1394src->drop_incomplete = DEFAULT_DROP_INCOMPLETE;
dv1394src->use_avc = DEFAULT_USE_AVC;
dv1394src->guid = DEFAULT_GUID;
dv1394src->uri = g_strdup_printf ("dv://%d", dv1394src->port);
dv1394src->device_name = g_strdup_printf ("Default");
READ_SOCKET (dv1394src) = -1;
WRITE_SOCKET (dv1394src) = -1;
/* initialized when first header received */
dv1394src->frame_size = 0;
dv1394src->buf = NULL;
dv1394src->frame = NULL;
dv1394src->frame_sequence = 0;
dv1394src->provided_clock = gst_1394_clock_new ("dv1394clock");
}
static void
gst_dv1394src_dispose (GObject * object)
{
GstDV1394Src *src = GST_DV1394SRC (object);
if (src->provided_clock) {
g_object_unref (src->provided_clock);
}
g_free (src->uri);
src->uri = NULL;
g_free (src->device_name);
src->device_name = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_dv1394src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDV1394Src *filter = GST_DV1394SRC (object);
switch (prop_id) {
case PROP_PORT:
filter->port = g_value_get_int (value);
g_free (filter->uri);
filter->uri = g_strdup_printf ("dv://%d", filter->port);
break;
case PROP_CHANNEL:
filter->channel = g_value_get_int (value);
break;
case PROP_SKIP:
filter->skip = g_value_get_int (value);
break;
case PROP_CONSECUTIVE:
filter->consecutive = g_value_get_int (value);
break;
case PROP_DROP_INCOMPLETE:
filter->drop_incomplete = g_value_get_boolean (value);
break;
case PROP_USE_AVC:
filter->use_avc = g_value_get_boolean (value);
break;
case PROP_GUID:
filter->guid = g_value_get_uint64 (value);
gst_dv1394src_update_device_name (filter);
break;
default:
break;
}
}
static void
gst_dv1394src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDV1394Src *filter = GST_DV1394SRC (object);
switch (prop_id) {
case PROP_PORT:
g_value_set_int (value, filter->port);
break;
case PROP_CHANNEL:
g_value_set_int (value, filter->channel);
break;
case PROP_SKIP:
g_value_set_int (value, filter->skip);
break;
case PROP_CONSECUTIVE:
g_value_set_int (value, filter->consecutive);
break;
case PROP_DROP_INCOMPLETE:
g_value_set_boolean (value, filter->drop_incomplete);
break;
case PROP_USE_AVC:
g_value_set_boolean (value, filter->use_avc);
break;
case PROP_GUID:
g_value_set_uint64 (value, filter->guid);
break;
case PROP_DEVICE_NAME:
g_value_set_string (value, filter->device_name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstClock *
gst_dv1394src_provide_clock (GstElement * element)
{
GstDV1394Src *dv1394src = GST_DV1394SRC (element);
return GST_CLOCK_CAST (gst_object_ref (dv1394src->provided_clock));
}
static GstStateChangeReturn
gst_dv1394_src_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstDV1394Src *src = GST_DV1394SRC (element);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
gst_element_post_message (element,
gst_message_new_clock_lost (GST_OBJECT_CAST (element),
GST_CLOCK_CAST (src->provided_clock)));
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
gst_element_post_message (element,
gst_message_new_clock_provide (GST_OBJECT_CAST (element),
GST_CLOCK_CAST (src->provided_clock), TRUE));
break;
default:
break;
}
return ret;
}
#ifdef HAVE_LIBIEC61883
static GstDV1394Src *
gst_dv1394src_from_raw1394handle (raw1394handle_t handle)
{
iec61883_dv_t dv = (iec61883_dv_t) raw1394_get_userdata (handle);
iec61883_dv_fb_t dv_fb =
(iec61883_dv_fb_t) iec61883_dv_get_callback_data (dv);
return GST_DV1394SRC (iec61883_dv_fb_get_callback_data (dv_fb));
}
#else /* HAVE_LIBIEC61883 */
static GstDV1394Src *
gst_dv1394src_from_raw1394handle (raw1394handle_t handle)
{
return GST_DV1394SRC (raw1394_get_userdata (handle));
}
#endif /* HAVE_LIBIEC61883 */
#ifdef HAVE_LIBIEC61883
static int
gst_dv1394src_iec61883_receive (unsigned char *data, int len,
int complete, void *cbdata)
{
GstDV1394Src *dv1394src = GST_DV1394SRC (cbdata);
if (G_UNLIKELY (!gst_pad_has_current_caps (GST_BASE_SRC_PAD (dv1394src)))) {
GstCaps *caps;
unsigned char *p = data;
// figure format (NTSC/PAL)
if (p[3] & 0x80) {
// PAL
dv1394src->frame_size = PAL_FRAMESIZE;
dv1394src->frame_rate = PAL_FRAMERATE;
GST_DEBUG ("PAL data");
caps = gst_caps_new_simple ("video/x-dv",
"format", G_TYPE_STRING, "PAL",
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
} else {
// NTSC (untested)
dv1394src->frame_size = NTSC_FRAMESIZE;
dv1394src->frame_rate = NTSC_FRAMERATE;
GST_DEBUG
("NTSC data [untested] - please report success/failure to <dan@f3c.com>");
caps = gst_caps_new_simple ("video/x-dv",
"format", G_TYPE_STRING, "NTSC",
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
}
gst_pad_set_caps (GST_BASE_SRC_PAD (dv1394src), caps);
gst_caps_unref (caps);
}
dv1394src->frame = NULL;
if (G_LIKELY ((dv1394src->frame_sequence + 1) % (dv1394src->skip +
dv1394src->consecutive) < dv1394src->consecutive)) {
if (complete && len == dv1394src->frame_size) {
GstBuffer *buf;
buf = gst_buffer_new_and_alloc (dv1394src->frame_size);
GST_BUFFER_OFFSET (buf) = dv1394src->frame_sequence;
gst_buffer_fill (buf, 0, data, len);
dv1394src->buf = buf;
}
}
dv1394src->frame_sequence++;
return 0;
}
#else
static int
gst_dv1394src_iso_receive (raw1394handle_t handle, int channel, size_t len,
quadlet_t * data)
{
GstDV1394Src *dv1394src = gst_dv1394src_from_raw1394handle (handle);
if (len > 16) {
/*
the following code taken from kino-0.51 (Dan Dennedy/Charles Yates)
Kindly relicensed under the LGPL. See the commit log for version 1.6 of
this file in CVS.
*/
unsigned char *p = (unsigned char *) &data[3];
int section_type = p[0] >> 5; /* section type is in bits 5 - 7 */
int dif_sequence = p[1] >> 4; /* dif sequence number is in bits 4 - 7 */
int dif_block = p[2];
/* if we are at the beginning of a frame,
we set buf=frame, and alloc a new buffer for frame
*/
if (section_type == 0 && dif_sequence == 0) { // dif header
if (!GST_PAD_CAPS (GST_BASE_SRC_PAD (dv1394src))) {
GstCaps *caps;
// figure format (NTSC/PAL)
if (p[3] & 0x80) {
// PAL
dv1394src->frame_size = PAL_FRAMESIZE;
dv1394src->frame_rate = PAL_FRAMERATE;
GST_DEBUG ("PAL data");
caps = gst_caps_new_simple ("video/x-dv",
"format", G_TYPE_STRING, "PAL",
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
} else {
// NTSC (untested)
dv1394src->frame_size = NTSC_FRAMESIZE;
dv1394src->frame_rate = NTSC_FRAMERATE;
GST_DEBUG
("NTSC data [untested] - please report success/failure to <dan@f3c.com>");
caps = gst_caps_new_simple ("video/x-dv",
"format", G_TYPE_STRING, "NTSC",
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
}
gst_pad_set_caps (GST_BASE_SRC_PAD (dv1394src), caps);
gst_caps_unref (caps);
}
// drop last frame when not complete
if (!dv1394src->drop_incomplete
|| dv1394src->bytes_in_frame == dv1394src->frame_size) {
dv1394src->buf = dv1394src->frame;
} else {
GST_INFO_OBJECT (GST_ELEMENT (dv1394src), "incomplete frame dropped");
g_signal_emit (G_OBJECT (dv1394src),
gst_dv1394src_signals[SIGNAL_FRAME_DROPPED], 0);
if (dv1394src->frame) {
gst_buffer_unref (dv1394src->frame);
}
}
if ((dv1394src->frame_sequence + 1) % (dv1394src->skip +
dv1394src->consecutive) < dv1394src->consecutive) {
GstBuffer *buf;
gint64 i64;
buf = gst_buffer_new_and_alloc (dv1394src->frame_size);
/* fill in offset, duration, timestamp */
GST_BUFFER_OFFSET (buf) = dv1394src->frame_sequence;
dv1394src->frame = buf;
}
dv1394src->frame_sequence++;
dv1394src->bytes_in_frame = 0;
}
if (dv1394src->frame != NULL) {
guint8 *data = GST_BUFFER_DATA (dv1394src->frame);
switch (section_type) {
case 0: /* 1 Header block */
/* p[3] |= 0x80; // hack to force PAL data */
memcpy (data + dif_sequence * 150 * 80, p, 480);
break;
case 1: /* 2 Subcode blocks */
memcpy (data + dif_sequence * 150 * 80 + (1 + dif_block) * 80, p,
480);
break;
case 2: /* 3 VAUX blocks */
memcpy (data + dif_sequence * 150 * 80 + (3 + dif_block) * 80, p,
480);
break;
case 3: /* 9 Audio blocks interleaved with video */
memcpy (data + dif_sequence * 150 * 80 + (6 + dif_block * 16) * 80, p,
480);
break;
case 4: /* 135 Video blocks interleaved with audio */
memcpy (data + dif_sequence * 150 * 80 + (7 + (dif_block / 15) +
dif_block) * 80, p, 480);
break;
default: /* we can't handle any other data */
break;
}
dv1394src->bytes_in_frame += 480;
}
}
return 0;
}
#endif
/*
* When an ieee1394 bus reset happens, usually a device has been removed
* or added. We send a message on the message bus with the node count
* and whether the capture device used in this element connected, disconnected
* or was unchanged
* Message structure:
* nodecount - integer with number of nodes on bus
* current-device-change - integer (1 if device connected, 0 if no change to
* current device status, -1 if device disconnected)
*/
static int
gst_dv1394src_bus_reset (raw1394handle_t handle, unsigned int generation)
{
GstDV1394Src *src;
gint nodecount;
GstMessage *message;
GstStructure *structure;
gint current_device_change;
gint i;
src = gst_dv1394src_from_raw1394handle (handle);
GST_INFO_OBJECT (src, "have bus reset");
/* update generation - told to do so by docs */
raw1394_update_generation (handle, generation);
nodecount = raw1394_get_nodecount (handle);
/* allocate memory for portinfo */
/* current_device_change is -1 if camera disconnected, 0 if other device
* connected or 1 if camera has now connected */
current_device_change = -1;
for (i = 0; i < nodecount; i++) {
if (src->guid == rom1394_get_guid (handle, i)) {
/* Camera is with us */
GST_DEBUG ("Camera is with us");
if (!src->connected) {
current_device_change = 1;
src->connected = TRUE;
} else
current_device_change = 0;
}
}
if (src->connected && current_device_change == -1) {
GST_DEBUG ("Camera has disconnected");
src->connected = FALSE;
} else if (!src->connected && current_device_change == -1) {
GST_DEBUG ("Camera is still not with us");
current_device_change = 0;
}
structure = gst_structure_new ("ieee1394-bus-reset", "nodecount", G_TYPE_INT,
nodecount, "current-device-change", G_TYPE_INT, current_device_change,
NULL);
message = gst_message_new_element (GST_OBJECT (src), structure);
gst_element_post_message (GST_ELEMENT (src), message);
return 0;
}
static GstFlowReturn
gst_dv1394src_create (GstPushSrc * psrc, GstBuffer ** buf)
{
GstDV1394Src *dv1394src = GST_DV1394SRC (psrc);
struct pollfd pollfds[2];
pollfds[0].fd = raw1394_get_fd (dv1394src->handle);
pollfds[0].events = POLLIN | POLLERR | POLLHUP | POLLPRI;
pollfds[1].fd = READ_SOCKET (dv1394src);
pollfds[1].events = POLLIN | POLLERR | POLLHUP | POLLPRI;
if (G_UNLIKELY (dv1394src->buf)) {
/* maybe we had an error before, and there's a stale buffer? */
gst_buffer_unref (dv1394src->buf);
dv1394src->buf = NULL;
}
while (TRUE) {
int res = poll (pollfds, 2, -1);
if (G_UNLIKELY (res < 0)) {
if (errno == EAGAIN || errno == EINTR)
continue;
else
goto error_while_polling;
}
if (G_UNLIKELY (pollfds[1].revents)) {
char command;
if (pollfds[1].revents & POLLIN)
READ_COMMAND (dv1394src, command, res);
goto told_to_stop;
} else if (G_LIKELY (pollfds[0].revents & POLLIN)) {
/* shouldn't block in theory */
raw1394_loop_iterate (dv1394src->handle);
if (dv1394src->buf)
break;
}
}
g_assert (dv1394src->buf);
*buf = dv1394src->buf;
dv1394src->buf = NULL;
return GST_FLOW_OK;
error_while_polling:
{
GST_ELEMENT_ERROR (dv1394src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
return GST_FLOW_EOS;
}
told_to_stop:
{
GST_DEBUG_OBJECT (dv1394src, "told to stop, shutting down");
return GST_FLOW_FLUSHING;
}
}
static int
gst_dv1394src_discover_avc_node (GstDV1394Src * src)
{
int node = -1;
int i, j = 0;
int m = src->num_ports;
if (src->port >= 0) {
/* search on explicit port */
j = src->port;
m = j + 1;
}
/* loop over all our ports */
for (; j < m && node == -1; j++) {
raw1394handle_t handle;
struct raw1394_portinfo pinf[16];
/* open the port */
handle = raw1394_new_handle ();
if (!handle) {
GST_WARNING ("raw1394 - failed to get handle: %s.\n", strerror (errno));
continue;
}
if (raw1394_get_port_info (handle, pinf, 16) < 0) {
GST_WARNING ("raw1394 - failed to get port info: %s.\n",
strerror (errno));
goto next;
}
/* tell raw1394 which host adapter to use */
if (raw1394_set_port (handle, j) < 0) {
GST_WARNING ("raw1394 - failed to set set port: %s.\n", strerror (errno));
goto next;
}
/* now loop over all the nodes */
for (i = 0; i < raw1394_get_nodecount (handle); i++) {
/* are we looking for an explicit GUID ? */
if (src->guid != 0) {
if (src->guid == rom1394_get_guid (handle, i)) {
node = i;
src->port = j;
g_free (src->uri);
src->uri = g_strdup_printf ("dv://%d", src->port);
break;
}
} else {
rom1394_directory rom_dir;
/* select first AV/C Tape Recorder Player node */
if (rom1394_get_directory (handle, i, &rom_dir) < 0) {
GST_WARNING ("error reading config rom directory for node %d\n", i);
continue;
}
if ((rom1394_get_node_type (&rom_dir) == ROM1394_NODE_TYPE_AVC) &&
avc1394_check_subunit_type (handle, i, AVC1394_SUBUNIT_TYPE_VCR)) {
node = i;
src->port = j;
src->guid = rom1394_get_guid (handle, i);
g_free (src->uri);
src->uri = g_strdup_printf ("dv://%d", src->port);
g_free (src->device_name);
src->device_name = g_strdup (rom_dir.label);
break;
}
rom1394_free_directory (&rom_dir);
}
}
next:
raw1394_destroy_handle (handle);
}
return node;
}
static gboolean
gst_dv1394src_start (GstBaseSrc * bsrc)
{
GstDV1394Src *src = GST_DV1394SRC (bsrc);
int control_sock[2];
src->connected = FALSE;
if (socketpair (PF_UNIX, SOCK_STREAM, 0, control_sock) < 0)
goto socket_pair;
READ_SOCKET (src) = control_sock[0];
WRITE_SOCKET (src) = control_sock[1];
fcntl (READ_SOCKET (src), F_SETFL, O_NONBLOCK);
fcntl (WRITE_SOCKET (src), F_SETFL, O_NONBLOCK);
src->handle = raw1394_new_handle ();
if (!src->handle) {
if (errno == EACCES)
goto permission_denied;
else if (errno == ENOENT)
goto not_found;
else
goto no_handle;
}
src->num_ports = raw1394_get_port_info (src->handle, src->pinfo, 16);
if (src->num_ports == 0)
goto no_ports;
if (src->use_avc || src->port == -1)
src->avc_node = gst_dv1394src_discover_avc_node (src);
/* lets destroy handle and create one on port
this is more reliable than setting port on
the existing handle */
raw1394_destroy_handle (src->handle);
src->handle = raw1394_new_handle_on_port (src->port);
if (!src->handle)
goto cannot_set_port;
raw1394_set_userdata (src->handle, src);
raw1394_set_bus_reset_handler (src->handle, gst_dv1394src_bus_reset);
#ifdef HAVE_LIBIEC61883
if ((src->iec61883dv =
iec61883_dv_fb_init (src->handle,
gst_dv1394src_iec61883_receive, src)) == NULL)
goto cannot_initialise_dv;
#else
raw1394_set_iso_handler (src->handle, src->channel,
gst_dv1394src_iso_receive);
#endif
GST_DEBUG_OBJECT (src, "successfully opened up 1394 connection");
src->connected = TRUE;
#ifdef HAVE_LIBIEC61883
if (iec61883_dv_fb_start (src->iec61883dv, src->channel) != 0)
goto cannot_start;
#else
if (raw1394_start_iso_rcv (src->handle, src->channel) < 0)
goto cannot_start;
#endif
if (src->use_avc) {
raw1394handle_t avc_handle = raw1394_new_handle_on_port (src->port);
/* start the VCR */
if (avc_handle) {
if (!avc1394_vcr_is_recording (avc_handle, src->avc_node)
&& avc1394_vcr_is_playing (avc_handle, src->avc_node)
!= AVC1394_VCR_OPERAND_PLAY_FORWARD)
avc1394_vcr_play (avc_handle, src->avc_node);
raw1394_destroy_handle (avc_handle);
} else {
GST_WARNING_OBJECT (src, "Starting VCR via avc1394 failed: %s",
g_strerror (errno));
}
}
gst_1394_clock_set_handle (src->provided_clock, src->handle);
return TRUE;
socket_pair:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
GST_ERROR_SYSTEM);
return FALSE;
}
permission_denied:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM);
return FALSE;
}
not_found:
{
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL), GST_ERROR_SYSTEM);
return FALSE;
}
no_handle:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("can't get raw1394 handle (%s)", g_strerror (errno)));
return FALSE;
}
no_ports:
{
raw1394_destroy_handle (src->handle);
src->handle = NULL;
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
("no ports available for raw1394"));
return FALSE;
}
cannot_set_port:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("can't set 1394 port %d", src->port));
return FALSE;
}
cannot_start:
{
raw1394_destroy_handle (src->handle);
src->handle = NULL;
#ifdef HAVE_LIBIEC61883
iec61883_dv_fb_close (src->iec61883dv);
src->iec61883dv = NULL;
#endif
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("can't start 1394 iso receive"));
return FALSE;
}
#ifdef HAVE_LIBIEC61883
cannot_initialise_dv:
{
raw1394_destroy_handle (src->handle);
src->handle = NULL;
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("can't initialise iec61883 dv"));
return FALSE;
}
#endif
}
static gboolean
gst_dv1394src_stop (GstBaseSrc * bsrc)
{
GstDV1394Src *src = GST_DV1394SRC (bsrc);
close (READ_SOCKET (src));
close (WRITE_SOCKET (src));
READ_SOCKET (src) = -1;
WRITE_SOCKET (src) = -1;
#ifdef HAVE_LIBIEC61883
iec61883_dv_fb_close (src->iec61883dv);
#else
raw1394_stop_iso_rcv (src->handle, src->channel);
#endif
if (src->use_avc) {
raw1394handle_t avc_handle = raw1394_new_handle_on_port (src->port);
/* pause and stop the VCR */
if (avc_handle) {
if (!avc1394_vcr_is_recording (avc_handle, src->avc_node)
&& (avc1394_vcr_is_playing (avc_handle, src->avc_node)
!= AVC1394_VCR_OPERAND_PLAY_FORWARD_PAUSE))
avc1394_vcr_pause (avc_handle, src->avc_node);
avc1394_vcr_stop (avc_handle, src->avc_node);
raw1394_destroy_handle (avc_handle);
} else {
GST_WARNING_OBJECT (src, "Starting VCR via avc1394 failed: %s",
g_strerror (errno));
}
}
gst_1394_clock_unset_handle (src->provided_clock);
raw1394_destroy_handle (src->handle);
return TRUE;
}
static gboolean
gst_dv1394src_unlock (GstBaseSrc * bsrc)
{
GstDV1394Src *src = GST_DV1394SRC (bsrc);
SEND_COMMAND (src, CONTROL_STOP);
return TRUE;
}
static gboolean
gst_dv1394src_query (GstBaseSrc * basesrc, GstQuery * query)
{
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
gst_query_set_latency (query, TRUE, GST_SECOND / 25, GST_SECOND / 25);
}
break;
default:
goto not_supported;
}
return TRUE;
not_supported:
return GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
}
static void
gst_dv1394src_update_device_name (GstDV1394Src * src)
{
raw1394handle_t handle;
gint portcount, port, nodecount, node;
rom1394_directory directory;
g_free (src->device_name);
src->device_name = NULL;
GST_LOG_OBJECT (src, "updating device name for current GUID");
handle = raw1394_new_handle ();
if (handle == NULL)
goto gethandle_failed;
portcount = raw1394_get_port_info (handle, NULL, 0);
for (port = 0; port < portcount; port++) {
if (raw1394_set_port (handle, port) >= 0) {
nodecount = raw1394_get_nodecount (handle);
for (node = 0; node < nodecount; node++) {
if (src->guid == rom1394_get_guid (handle, node)) {
if (rom1394_get_directory (handle, node, &directory) >= 0) {
g_free (src->device_name);
src->device_name = g_strdup (directory.label);
rom1394_free_directory (&directory);
goto done;
} else {
GST_WARNING ("error reading rom directory for node %d", node);
}
}
}
}
}
src->device_name = g_strdup ("Unknown"); /* FIXME: translate? */
done:
raw1394_destroy_handle (handle);
return;
/* ERRORS */
gethandle_failed:
{
GST_WARNING ("failed to get raw1394 handle: %s", g_strerror (errno));
src->device_name = g_strdup ("Unknown"); /* FIXME: translate? */
return;
}
}
/*** GSTURIHANDLER INTERFACE *************************************************/
static GstURIType
gst_dv1394src_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
gst_dv1394src_uri_get_protocols (GType type)
{
static const gchar *protocols[] = { (char *) "dv", NULL };
return protocols;
}
static gchar *
gst_dv1394src_uri_get_uri (GstURIHandler * handler)
{
GstDV1394Src *gst_dv1394src = GST_DV1394SRC (handler);
return gst_dv1394src->uri;
}
static gboolean
gst_dv1394src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** error)
{
gchar *protocol, *location;
gboolean ret = TRUE;
GstDV1394Src *gst_dv1394src = GST_DV1394SRC (handler);
protocol = gst_uri_get_protocol (uri);
if (strcmp (protocol, "dv") != 0) {
g_free (protocol);
g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI, "Invalid DV URI");
return FALSE;
}
g_free (protocol);
location = gst_uri_get_location (uri);
if (location && *location != '\0')
gst_dv1394src->port = strtol (location, NULL, 10);
else
gst_dv1394src->port = DEFAULT_PORT;
g_free (location);
g_free (gst_dv1394src->uri);
gst_dv1394src->uri = g_strdup_printf ("dv://%d", gst_dv1394src->port);
return ret;
}
static void
gst_dv1394src_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_dv1394src_uri_get_type;
iface->get_protocols = gst_dv1394src_uri_get_protocols;
iface->get_uri = gst_dv1394src_uri_get_uri;
iface->set_uri = gst_dv1394src_uri_set_uri;
}
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