static gboolean
gst_vcdsrc_srcpad_event (GstPad * pad, GstEvent * event)
{
GstVCDSrc *vcdsrc = GST_VCDSRC (gst_pad_get_parent (pad));
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
gint64 new_off;
if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES)
return FALSE;
new_off = GST_EVENT_SEEK_OFFSET (event);
switch (GST_EVENT_SEEK_METHOD (event)) {
case GST_SEEK_METHOD_SET:
/* no-op */
break;
case GST_SEEK_METHOD_CUR:
new_off += vcdsrc->curoffset * vcdsrc->bytes_per_read;
break;
case GST_SEEK_METHOD_END:
new_off = (gst_vcdsrc_msf (vcdsrc, vcdsrc->track + 1) -
vcdsrc->trackoffset) * vcdsrc->bytes_per_read - new_off;
break;
default:
return FALSE;
}
if (new_off < 0 ||
new_off > (gst_vcdsrc_msf (vcdsrc, vcdsrc->track + 1) -
vcdsrc->trackoffset) * vcdsrc->bytes_per_read)
return FALSE;
vcdsrc->curoffset = new_off / vcdsrc->bytes_per_read;
vcdsrc->tempoffset = new_off % vcdsrc->bytes_per_read;
vcdsrc->discont = TRUE;
if (GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH)
vcdsrc->flush = TRUE;
break;
}
default:
res = FALSE;
break;
}
gst_event_unref (event);
return res;
}
static gboolean
gst_vcdsrc_srcpad_query (GstPad * pad, GstQueryType type,
GstFormat * format, gint64 * value)
{
GstVCDSrc *vcdsrc = GST_VCDSRC (gst_pad_get_parent (pad));
gboolean res = TRUE;
if (*format != GST_FORMAT_BYTES)
return FALSE;
switch (type) {
case GST_QUERY_TOTAL:
*value = (gst_vcdsrc_msf (vcdsrc, vcdsrc->track + 1) -
vcdsrc->trackoffset) * vcdsrc->bytes_per_read;
break;
case GST_QUERY_POSITION:
*value = vcdsrc->curoffset * vcdsrc->bytes_per_read;
break;
default:
res = FALSE;
break;
}
return res;
}
static void
gst_vcdsrc_recalculate (GstVCDSrc * vcdsrc)
{
/* calculate track offset (beginning of track) */
vcdsrc->trackoffset = gst_vcdsrc_msf (vcdsrc, vcdsrc->track);
GST_DEBUG ("track offset is %ld", vcdsrc->trackoffset);
}
static GstFlowReturn
gst_vcdsrc_create (GstPushSrc * src, GstBuffer ** buf)
{
GstVCDSrc *vcdsrc;
GstBuffer *outbuf;
gulong offset;
struct cdrom_msf *msf;
gint error_count = 0;
vcdsrc = GST_VCDSRC (src);
offset = vcdsrc->trackoffset + vcdsrc->curoffset;
if (offset >= gst_vcdsrc_msf (vcdsrc, vcdsrc->track + 1))
goto eos;
/* create the buffer */
outbuf = gst_buffer_new_and_alloc (vcdsrc->bytes_per_read);
msf = (struct cdrom_msf *) GST_BUFFER_DATA (outbuf);
read:
/* read it in from the device */
msf->cdmsf_frame0 = offset % 75;
msf->cdmsf_sec0 = (offset / 75) % 60;
msf->cdmsf_min0 = (offset / (75 * 60));
GST_LOG ("msf is %d:%d:%d", msf->cdmsf_min0, msf->cdmsf_sec0,
msf->cdmsf_frame0);
if (ioctl (vcdsrc->fd, CDROMREADRAW, msf) < 0) {
if (++error_count <= vcdsrc->max_errors) {
vcdsrc->curoffset++;
offset++;
goto read;
}
GST_ELEMENT_ERROR (vcdsrc, RESOURCE, READ, (NULL),
("Read from cdrom at %d:%d:%d failed: %s",
msf->cdmsf_min0, msf->cdmsf_sec0, msf->cdmsf_frame0,
strerror (errno)));
return GST_FLOW_ERROR;
}
GST_BUFFER_SIZE (outbuf) = vcdsrc->bytes_per_read;
vcdsrc->curoffset += 1;
*buf = outbuf;
return GST_FLOW_OK;
/* ERRORS */
eos:
{
GST_DEBUG_OBJECT (vcdsrc, "got eos");
return GST_FLOW_UNEXPECTED;
}
}
static GstFlowReturn
gst_vcdsrc_create (GstPushSrc * src, GstBuffer ** buf)
{
GstVCDSrc *vcdsrc;
GstBuffer *outbuf;
GstMapInfo map_info;
gulong offset;
struct cdrom_msf *msf;
gint error_count = 0;
vcdsrc = GST_VCDSRC (src);
offset = vcdsrc->trackoffset + vcdsrc->curoffset;
if (offset >= gst_vcdsrc_msf (vcdsrc, vcdsrc->track + 1))
goto eos;
/* create the buffer */
outbuf = gst_buffer_new_allocate (NULL, vcdsrc->bytes_per_read, NULL);
if (!outbuf)
goto error_unmapped;
if (!gst_buffer_map (outbuf, &map_info, GST_MAP_READWRITE))
goto error_unmapped;
msf = (struct cdrom_msf *) map_info.data;
read:
/* read it in from the device */
msf->cdmsf_frame0 = offset % 75;
msf->cdmsf_sec0 = (offset / 75) % 60;
msf->cdmsf_min0 = (offset / (75 * 60));
GST_LOG ("msf is %d:%d:%d", msf->cdmsf_min0, msf->cdmsf_sec0,
msf->cdmsf_frame0);
if (ioctl (vcdsrc->fd, CDROMREADRAW, msf) < 0) {
if (++error_count <= vcdsrc->max_errors) {
vcdsrc->curoffset++;
offset++;
goto read;
}
GST_ELEMENT_ERROR (vcdsrc, RESOURCE, READ, (NULL),
("Read from cdrom at %d:%d:%d failed: %s",
msf->cdmsf_min0, msf->cdmsf_sec0, msf->cdmsf_frame0,
strerror (errno)));
goto error_mapped;
}
gst_buffer_unmap (outbuf, &map_info);
vcdsrc->curoffset += 1;
*buf = outbuf;
return GST_FLOW_OK;
/* ERRORS */
error_mapped:
gst_buffer_unmap (outbuf, &map_info);
error_unmapped:
if (outbuf)
gst_buffer_unref (outbuf);
return GST_FLOW_ERROR;
eos:
{
GST_DEBUG_OBJECT (vcdsrc, "got eos");
return GST_FLOW_EOS;
}
}
