static const gchar *
gst_fd_src_uri_get_uri (GstURIHandler * handler)
{
GstFdSrc *src = GST_FD_SRC (handler);
return src->uri;
}
static gboolean
gst_fd_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
gchar *protocol;
GstFdSrc *src = GST_FD_SRC (handler);
gint fd;
protocol = gst_uri_get_protocol (uri);
if (strcmp (protocol, "fd") != 0) {
g_free (protocol);
return FALSE;
}
g_free (protocol);
if (sscanf (uri, "fd://%d", &fd) != 1 || fd < 0)
return FALSE;
src->new_fd = fd;
GST_OBJECT_LOCK (src);
if (GST_STATE (GST_ELEMENT (src)) <= GST_STATE_READY) {
gst_fd_src_update_fd (src);
}
GST_OBJECT_UNLOCK (src);
return TRUE;
}
static gboolean
gst_fd_src_get_size (GstBaseSrc * bsrc, guint64 * size)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
struct stat stat_results;
if (!src->seekable_fd) {
/* If it isn't seekable, we won't know the length (but fstat will still
* succeed, and wrongly say our length is zero. */
return FALSE;
}
if (fstat (src->fd, &stat_results) < 0)
goto could_not_stat;
*size = stat_results.st_size;
return TRUE;
/* ERROR */
could_not_stat:
{
return FALSE;
}
}
static gboolean
gst_fd_src_do_seek (GstBaseSrc * bsrc, GstSegment * segment)
{
gint res;
gint64 offset;
GstFdSrc *src = GST_FD_SRC (bsrc);
offset = segment->start;
/* No need to seek to the current position */
if (offset == src->curoffset)
return TRUE;
res = lseek (src->fd, offset, SEEK_SET);
if (G_UNLIKELY (res < 0 || res != offset))
goto seek_failed;
segment->last_stop = segment->start;
segment->time = segment->start;
return TRUE;
seek_failed:
GST_DEBUG_OBJECT (src, "lseek returned %" G_GINT64_FORMAT, offset);
return FALSE;
}
static void
gst_fd_src_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstFdSrc *src = GST_FD_SRC (object);
switch (prop_id) {
case PROP_FD:
src->new_fd = g_value_get_int (value);
/* If state is ready or below, update the current fd immediately
* so it is reflected in get_properties and uri */
GST_OBJECT_LOCK (object);
if (GST_STATE (GST_ELEMENT (src)) <= GST_STATE_READY) {
GST_DEBUG_OBJECT (src, "state ready or lower, updating to use new fd");
gst_fd_src_update_fd (src);
} else {
GST_DEBUG_OBJECT (src, "state above ready, not updating to new fd yet");
}
GST_OBJECT_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_fd_src_is_seekable (GstBaseSrc * bsrc)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
return src->seekable_fd;
}
static void
gst_fd_src_dispose (GObject * obj)
{
GstFdSrc *src = GST_FD_SRC (obj);
g_free (src->uri);
src->uri = NULL;
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static gboolean
gst_fd_src_unlock_stop (GstBaseSrc * bsrc)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
GST_LOG_OBJECT (src, "No longer flushing");
GST_OBJECT_LOCK (src);
gst_poll_set_flushing (src->fdset, FALSE);
GST_OBJECT_UNLOCK (src);
return TRUE;
}
static gboolean
gst_fd_src_stop (GstBaseSrc * bsrc)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
if (src->fdset) {
gst_poll_free (src->fdset);
src->fdset = NULL;
}
return TRUE;
}
static void
gst_fd_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstFdSrc *src = GST_FD_SRC (object);
switch (prop_id) {
case PROP_FD:
g_value_set_int (value, src->fd);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_fd_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
gchar *protocol, *q;
GstFdSrc *src = GST_FD_SRC (handler);
gint fd;
guint64 size = -1;
GST_INFO_OBJECT (src, "checking uri %s", uri);
protocol = gst_uri_get_protocol (uri);
if (strcmp (protocol, "fd") != 0) {
g_free (protocol);
return FALSE;
}
g_free (protocol);
if (sscanf (uri, "fd://%d", &fd) != 1 || fd < 0)
return FALSE;
if ((q = g_strstr_len (uri, -1, "?"))) {
gchar *sp;
GST_INFO_OBJECT (src, "found ?");
if ((sp = g_strstr_len (q, -1, "size="))) {
if (sscanf (sp, "size=%" G_GUINT64_FORMAT, &size) != 1) {
GST_INFO_OBJECT (src, "parsing size failed");
size = -1;
} else {
GST_INFO_OBJECT (src, "found size %" G_GUINT64_FORMAT, size);
}
}
}
src->new_fd = fd;
GST_OBJECT_LOCK (src);
if (GST_STATE (GST_ELEMENT (src)) <= GST_STATE_READY) {
gst_fd_src_update_fd (src, size);
}
GST_OBJECT_UNLOCK (src);
return TRUE;
}
static gboolean
gst_fd_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
gboolean ret = FALSE;
GstFdSrc *src = GST_FD_SRC (basesrc);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_URI:
gst_query_set_uri (query, src->uri);
ret = TRUE;
break;
default:
ret = FALSE;
break;
}
if (!ret)
ret = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
return ret;
}
static gboolean
gst_fd_src_start (GstBaseSrc * bsrc)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
src->curoffset = 0;
if ((src->fdset = gst_poll_new (TRUE)) == NULL)
goto socket_pair;
gst_fd_src_update_fd (src);
return TRUE;
/* ERRORS */
socket_pair:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
GST_ERROR_SYSTEM);
return FALSE;
}
}
static GstFlowReturn
gst_fd_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
{
GstFdSrc *src;
GstBuffer *buf;
gssize readbytes;
guint blocksize;
#ifndef HAVE_WIN32
gint retval;
#endif
src = GST_FD_SRC (psrc);
#ifndef HAVE_WIN32
do {
retval = gst_poll_wait (src->fdset, GST_CLOCK_TIME_NONE);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN)); /* retry if interrupted */
if (retval == -1) {
if (errno == EBUSY)
goto stopped;
else
goto select_error;
}
#endif
blocksize = GST_BASE_SRC (src)->blocksize;
/* create the buffer */
buf = gst_buffer_new_and_alloc (blocksize);
do {
readbytes = read (src->fd, GST_BUFFER_DATA (buf), blocksize);
GST_LOG_OBJECT (src, "read %" G_GSSIZE_FORMAT, readbytes);
} while (readbytes == -1 && errno == EINTR); /* retry if interrupted */
if (readbytes < 0)
goto read_error;
if (readbytes == 0)
goto eos;
GST_BUFFER_OFFSET (buf) = src->curoffset;
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
src->curoffset += readbytes;
GST_LOG_OBJECT (psrc, "Read buffer of size %" G_GSSIZE_FORMAT, readbytes);
/* we're done, return the buffer */
*outbuf = buf;
return GST_FLOW_OK;
/* ERRORS */
#ifndef HAVE_WIN32
select_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("select on file descriptor: %s.", g_strerror (errno)));
GST_DEBUG_OBJECT (psrc, "Error during select");
return GST_FLOW_ERROR;
}
stopped:
{
GST_DEBUG_OBJECT (psrc, "Select stopped");
return GST_FLOW_WRONG_STATE;
}
#endif
eos:
{
GST_DEBUG_OBJECT (psrc, "Read 0 bytes. EOS.");
gst_buffer_unref (buf);
return GST_FLOW_UNEXPECTED;
}
read_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("read on file descriptor: %s.", g_strerror (errno)));
GST_DEBUG_OBJECT (psrc, "Error reading from fd");
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_fd_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
{
GstFdSrc *src;
GstBuffer *buf;
gssize readbytes;
guint blocksize;
GstClockTime timeout;
#ifndef HAVE_WIN32
gboolean try_again;
gint retval;
#endif
src = GST_FD_SRC (psrc);
if (src->timeout > 0) {
timeout = src->timeout * GST_USECOND;
} else {
timeout = GST_CLOCK_TIME_NONE;
}
#ifndef HAVE_WIN32
do {
try_again = FALSE;
GST_LOG_OBJECT (src, "doing poll, timeout %" GST_TIME_FORMAT,
GST_TIME_ARGS (src->timeout));
retval = gst_poll_wait (src->fdset, timeout);
GST_LOG_OBJECT (src, "poll returned %d", retval);
if (G_UNLIKELY (retval == -1)) {
if (errno == EINTR || errno == EAGAIN) {
/* retry if interrupted */
try_again = TRUE;
} else if (errno == EBUSY) {
goto stopped;
} else {
goto poll_error;
}
} else if (G_UNLIKELY (retval == 0)) {
try_again = TRUE;
/* timeout, post element message */
gst_element_post_message (GST_ELEMENT_CAST (src),
gst_message_new_element (GST_OBJECT_CAST (src),
gst_structure_new ("GstFdSrcTimeout",
"timeout", G_TYPE_UINT64, src->timeout, NULL)));
}
} while (G_UNLIKELY (try_again)); /* retry if interrupted or timeout */
#endif
blocksize = GST_BASE_SRC (src)->blocksize;
/* create the buffer */
buf = gst_buffer_try_new_and_alloc (blocksize);
if (G_UNLIKELY (buf == NULL)) {
GST_ERROR_OBJECT (src, "Failed to allocate %u bytes", blocksize);
return GST_FLOW_ERROR;
}
do {
readbytes = read (src->fd, GST_BUFFER_DATA (buf), blocksize);
GST_LOG_OBJECT (src, "read %" G_GSSIZE_FORMAT, readbytes);
} while (readbytes == -1 && errno == EINTR); /* retry if interrupted */
if (readbytes < 0)
goto read_error;
if (readbytes == 0)
goto eos;
GST_BUFFER_OFFSET (buf) = src->curoffset;
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
src->curoffset += readbytes;
GST_LOG_OBJECT (psrc, "Read buffer of size %" G_GSSIZE_FORMAT, readbytes);
/* we're done, return the buffer */
*outbuf = buf;
return GST_FLOW_OK;
/* ERRORS */
#ifndef HAVE_WIN32
poll_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("poll on file descriptor: %s.", g_strerror (errno)));
GST_DEBUG_OBJECT (psrc, "Error during poll");
return GST_FLOW_ERROR;
}
stopped:
{
GST_DEBUG_OBJECT (psrc, "Poll stopped");
return GST_FLOW_WRONG_STATE;
}
#endif
eos:
{
GST_DEBUG_OBJECT (psrc, "Read 0 bytes. EOS.");
gst_buffer_unref (buf);
return GST_FLOW_UNEXPECTED;
}
read_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("read on file descriptor: %s.", g_strerror (errno)));
GST_DEBUG_OBJECT (psrc, "Error reading from fd");
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
