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_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVCDSrc *src; src = GST_VCDSRC (object); switch (prop_id) { case PROP_DEVICE: g_free (src->device); src->device = g_value_dup_string (value); break; case PROP_TRACK: if (g_value_get_int (value) >= 1 && g_value_get_int (value) < src->numtracks) { src->track = g_value_get_int (value); gst_vcdsrc_recalculate (src); } break; case PROP_MAX_ERRORS: src->max_errors = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }
/* open the file, necessary to go to RUNNING state */ static gboolean gst_vcdsrc_start (GstBaseSrc * bsrc) { int i; GstVCDSrc *src = GST_VCDSRC (bsrc); /* open the device */ src->fd = open (src->device, O_RDONLY); if (src->fd < 0) goto open_failed; /* read the table of contents */ if (ioctl (src->fd, CDROMREADTOCHDR, &src->tochdr)) goto toc_failed; /* allocate enough track structs for disk */ src->numtracks = (src->tochdr.cdth_trk1 - src->tochdr.cdth_trk0) + 1; src->tracks = g_new (struct cdrom_tocentry, src->numtracks + 1); /* read each track entry */ for (i = 0; i <= src->numtracks; i++) { src->tracks[i].cdte_track = i == src->numtracks ? CDROM_LEADOUT : i + 1; src->tracks[i].cdte_format = CDROM_MSF; if (ioctl (src->fd, CDROMREADTOCENTRY, &src->tracks[i])) goto toc_entry_failed; GST_DEBUG ("track %d begins at %d:%02d.%02d", i, src->tracks[i].cdte_addr.msf.minute, src->tracks[i].cdte_addr.msf.second, src->tracks[i].cdte_addr.msf.frame); } src->curoffset = 0; gst_vcdsrc_recalculate (src); return TRUE; /* ERRORS */ open_failed: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); return FALSE; } toc_failed: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); close (src->fd); return FALSE; } toc_entry_failed: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); g_free (src->tracks); close (src->fd); return FALSE; } }
static void gst_vcdsrc_finalize (GObject * object) { GstVCDSrc *vcdsrc = GST_VCDSRC (object); g_free (vcdsrc->device); G_OBJECT_CLASS (parent_class)->finalize (object); }
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 const gchar * gst_vcdsrc_uri_get_uri (GstURIHandler * handler) { GstVCDSrc *src = GST_VCDSRC (handler); gchar *result; GST_OBJECT_LOCK (src); result = g_strdup_printf ("vcd://%d", src->track); GST_OBJECT_UNLOCK (src); return result; }
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; }
/* close the file */ static gboolean gst_vcdsrc_stop (GstBaseSrc * bsrc) { GstVCDSrc *src = GST_VCDSRC (bsrc); /* close the file */ close (src->fd); /* zero out a lot of our state */ src->fd = 0; src->curoffset = 0; g_free (src->tracks); return TRUE; }
static void gst_vcdsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVCDSrc *src; g_return_if_fail (GST_IS_VCDSRC (object)); src = GST_VCDSRC (object); switch (prop_id) { case PROP_DEVICE: g_value_set_string (value, src->device); break; case PROP_TRACK: g_value_set_int (value, src->track); break; case PROP_MAX_ERRORS: g_value_set_int (value, src->max_errors); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }
static gboolean gst_vcdsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri) { GstVCDSrc *src = GST_VCDSRC (handler); gchar *location = NULL; gint tracknr; GST_DEBUG_OBJECT (src, "setting uri '%s'", uri); if (!gst_uri_has_protocol (uri, "vcd")) goto wrong_protocol; /* parse out the track in the location */ if (!(location = gst_uri_get_location (uri))) goto no_location; GST_DEBUG_OBJECT (src, "have location '%s'", location); /* * URI structure: vcd:///path/to/device,track-num */ if (g_str_has_prefix (uri, "vcd://")) { GST_OBJECT_LOCK (src); g_free (src->device); if (strlen (uri) > 6) src->device = g_strdup (uri + 6); else src->device = g_strdup (DEFAULT_DEVICE); GST_DEBUG_OBJECT (src, "configured device %s", src->device); GST_OBJECT_UNLOCK (src); } /* Parse the track number */ { char **split; split = g_strsplit (location, ",", 2); if (split == NULL || *split == NULL || split[1] == NULL) { tracknr = 1; } else if (sscanf (split[1], "%d", &tracknr) != 1 || tracknr < 1) { g_strfreev (split); goto invalid_location; } g_strfreev (split); } GST_OBJECT_LOCK (src); src->track = tracknr; GST_DEBUG_OBJECT (src, "configured track %d", src->track); GST_OBJECT_UNLOCK (src); g_free (location); return TRUE; /* ERRORS */ wrong_protocol: { GST_ERROR_OBJECT (src, "wrong protocol, uri = %s", uri); return FALSE; } no_location: { GST_ERROR_OBJECT (src, "no location specified"); return FALSE; } invalid_location: { GST_ERROR_OBJECT (src, "Invalid location %s in URI '%s'", location, uri); g_free (location); return FALSE; } }
/* open the file, necessary to go to RUNNING state */ static gboolean gst_vcdsrc_start (GstBaseSrc * bsrc) { int i; GstVCDSrc *src = GST_VCDSRC (bsrc); struct stat buf; /* open the device */ src->fd = open (src->device, O_RDONLY); if (src->fd < 0) goto open_failed; if (fstat (src->fd, &buf) < 0) goto toc_failed; /* If it's not a block device, then we need to try and * parse the cue file if there is one * FIXME implement */ if (!S_ISBLK (buf.st_mode)) { GST_DEBUG ("Reading CUE files not handled yet, cannot process %s", GST_STR_NULL (src->device)); goto toc_failed; } /* read the table of contents */ if (ioctl (src->fd, CDROMREADTOCHDR, &src->tochdr)) goto toc_failed; /* allocate enough track structs for disk */ src->numtracks = (src->tochdr.cdth_trk1 - src->tochdr.cdth_trk0) + 1; src->tracks = g_new (struct cdrom_tocentry, src->numtracks + 1); /* read each track entry */ for (i = 0; i <= src->numtracks; i++) { src->tracks[i].cdte_track = i == src->numtracks ? CDROM_LEADOUT : i + 1; src->tracks[i].cdte_format = CDROM_MSF; if (ioctl (src->fd, CDROMREADTOCENTRY, &src->tracks[i])) goto toc_entry_failed; GST_DEBUG ("track %d begins at %d:%02d.%02d", i, src->tracks[i].cdte_addr.msf.minute, src->tracks[i].cdte_addr.msf.second, src->tracks[i].cdte_addr.msf.frame); } src->curoffset = 0; gst_vcdsrc_recalculate (src); return TRUE; /* ERRORS */ open_failed: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); return FALSE; } toc_failed: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); close (src->fd); return FALSE; } toc_entry_failed: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); g_free (src->tracks); close (src->fd); return FALSE; } }
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; } }
static gboolean gst_vcdsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri) { GstVCDSrc *src = GST_VCDSRC (handler); gchar *protocol; gchar *location = NULL; gint tracknr; GST_DEBUG_OBJECT (src, "setting uri '%s'", uri); protocol = gst_uri_get_protocol (uri); if (protocol == NULL || strcmp (protocol, "vcd")) goto wrong_protocol; GST_DEBUG_OBJECT (src, "have protocol '%s'", protocol); g_free (protocol); /* parse out the track in the location */ if (!(location = gst_uri_get_location (uri))) goto no_location; GST_DEBUG_OBJECT (src, "have location '%s'", location); if (*location == '\0') { /* empty location selects track 1 */ tracknr = 1; } else { /* scan the track number */ if (sscanf (location, "%d", &tracknr) != 1) goto invalid_location; if (tracknr < 1) goto invalid_location; } GST_OBJECT_LOCK (src); src->track = tracknr; GST_DEBUG_OBJECT (src, "configured track %d", src->track); GST_OBJECT_UNLOCK (src); g_free (location); return TRUE; /* ERRORS */ wrong_protocol: { GST_ERROR_OBJECT (src, "wrong protocol %s specified", GST_STR_NULL (protocol)); g_free (protocol); return FALSE; } no_location: { GST_ERROR_OBJECT (src, "no location specified"); return FALSE; } invalid_location: { GST_ERROR_OBJECT (src, "Invalid location %s in URI '%s'", location, uri); g_free (location); return FALSE; } }