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ext/dvdread/dvdreadsrc.c: Make check stronger.

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Original commit message from CVS:
* ext/dvdread/dvdreadsrc.c: (gst_dvd_read_src_is_nav_pack):
Make check stronger.
This commit is contained in:
Tim-Philipp Müller 2006-06-29 12:25:15 +00:00
parent 3142e1a289
commit b756660a3c
2 changed files with 29 additions and 5 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2006-06-29 Tim-Philipp Müller <tim at centricular dot net>
* ext/dvdread/dvdreadsrc.c: (gst_dvd_read_src_is_nav_pack):
Make check stronger.
2006-06-28 Tim-Philipp Müller <tim at centricular dot net> 2006-06-28 Tim-Philipp Müller <tim at centricular dot net>
* gst/asfdemux/gstasfdemux.c: (gst_asf_demux_setup_pad), * gst/asfdemux/gstasfdemux.c: (gst_asf_demux_setup_pad),

29
ext/dvdread/dvdreadsrc.c
View file

@ -510,13 +510,32 @@ gst_dvd_read_src_get_next_cell_for (GstDvdReadSrc * src, gint cell)
return cell + 1; /* really +1? (tpm) */ return cell + 1; /* really +1? (tpm) */
} }
/* Returns true if the pack is a NAV pack. This check is clearly insufficient, /* Returns true if the pack is a NAV pack */
* and sometimes we incorrectly think that valid other packs are NAV packs. I
* need to make this stronger. */
static gboolean static gboolean
gst_dvd_read_src_is_nav_pack (const guint8 * buffer) gst_dvd_read_src_is_nav_pack (const guint8 * data)
{ {
return (buffer[41] == 0xbf && buffer[1027] == 0xbf); if (GST_READ_UINT32_BE (data + 0x26) != 0x000001BF)
return FALSE;
/* Check that this is substream 0 (PCI) */
if (data[0x2c] != 0)
return FALSE;
if (GST_READ_UINT32_BE (data + 0x400) != 0x000001BF)
return FALSE;
/* Check that this is substream 1 (DSI) */
if (data[0x406] != 1)
return FALSE;
/* Check sizes of PCI and DSI packets */
if (GST_READ_UINT16_BE (data + 0x2a) != 0x03d4)
return FALSE;
if (GST_READ_UINT16_BE (data + 0x404) != 0x03fa)
return FALSE;
return TRUE;
} }
typedef enum typedef enum