mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 17:20:36 +00:00
hdvparse: Emit application message with the parsed information.
This commit is contained in:
Edward Hervey
parent
c6cd4d09e2
commit
5df5059d56
1 changed files with 197 additions and 2 deletions
|
|
@ -55,6 +55,90 @@ enum
|
|||
PROP_0,
|
||||
};
|
||||
|
||||
static gchar *aperture_table[] = {
|
||||
"???",
|
||||
"cls",
|
||||
"1.0",
|
||||
"1.2",
|
||||
"1.4",
|
||||
"1.6",
|
||||
"1.7",
|
||||
"1.8",
|
||||
"2.0",
|
||||
"2.2",
|
||||
"2.4",
|
||||
"2.6",
|
||||
"2.8",
|
||||
"3.1",
|
||||
"3.4",
|
||||
"3.7",
|
||||
"4.0",
|
||||
"4.4",
|
||||
"4.8",
|
||||
"5.2",
|
||||
"5.6",
|
||||
"6.2",
|
||||
"6.8",
|
||||
"7.3",
|
||||
"8.0",
|
||||
"8.7",
|
||||
"9.6",
|
||||
"10",
|
||||
"11",
|
||||
"12",
|
||||
"14",
|
||||
"14",
|
||||
"16",
|
||||
"17",
|
||||
"18",
|
||||
"6.7"
|
||||
};
|
||||
|
||||
/* Observations from my HDV Camera (Canon HV20 Pal)
|
||||
* FIXME : replace with with code once we've figured out the algorithm.
|
||||
* Shutter speed 0x4f 0x50
|
||||
* ------------------------------------
|
||||
* 1/6 F3 95
|
||||
* 1/8 90 91
|
||||
* 1/12 FA 8A
|
||||
* 1/15 C8 88
|
||||
* 1/24 7D 85
|
||||
* 1/30 64 84
|
||||
* 1/48 BE 82
|
||||
* 1/60 32 82
|
||||
* 1/100 51 81
|
||||
* 1/250 87 80
|
||||
* 1/500 43 80
|
||||
* 1/1000 22 80
|
||||
* 1/2000 11 80
|
||||
*/
|
||||
typedef struct
|
||||
{
|
||||
guint vala, valb, shutter;
|
||||
} Shutter_t;
|
||||
|
||||
static Shutter_t shutter_table[] = {
|
||||
{0xf3, 0x95, 6},
|
||||
{0x90, 0x91, 8},
|
||||
{0xfa, 0x8a, 12},
|
||||
{0xc8, 0x88, 15},
|
||||
{0x7d, 0x85, 24},
|
||||
{0x64, 0x84, 30},
|
||||
{0xbe, 0x82, 48},
|
||||
{0x32, 0x82, 60},
|
||||
{0x51, 0x81, 100},
|
||||
{0x87, 0x80, 250},
|
||||
{0x43, 0x80, 500},
|
||||
{0x22, 0x80, 1000},
|
||||
{0x11, 0x80, 2000}
|
||||
};
|
||||
|
||||
/* Binary-coded decimal reading macro */
|
||||
#define BCD(c) ( ((((c) >> 4) & 0x0f) * 10) + ((c) & 0x0f) )
|
||||
/* Same as before, but with a mask */
|
||||
#define BCD_M(c, mask) (BCD ((c) & (mask)))
|
||||
|
||||
|
||||
/* the capabilities of the inputs and outputs.
|
||||
*
|
||||
* describe the real formats here.
|
||||
|
|
@ -124,11 +208,122 @@ gst_hdvparse_init (GstHDVParse * filter, GstHDVParseClass * klass)
|
|||
gst_base_transform_set_passthrough (transform, TRUE);
|
||||
}
|
||||
|
||||
static guint
|
||||
get_shutter_speed (guint8 vala, guint8 valb)
|
||||
{
|
||||
guint i;
|
||||
|
||||
for (i = 0; i < G_N_ELEMENTS (shutter_table); i++)
|
||||
if (shutter_table[i].vala == vala && shutter_table[i].valb == valb)
|
||||
return shutter_table[i].shutter;
|
||||
GST_WARNING ("Unknown shutter speed ! vala:0x%02x, valb:0x%02x", vala, valb);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_hdvparse_parse (GstHDVParse * filter, GstBuffer * buf)
|
||||
{
|
||||
GST_MEMDUMP_OBJECT (filter, "BUFFER", GST_BUFFER_DATA (buf),
|
||||
GST_BUFFER_SIZE (buf));
|
||||
guint8 *data = GST_BUFFER_DATA (buf);
|
||||
guint apertured, shutter;
|
||||
gfloat gain;
|
||||
gboolean dst = FALSE;
|
||||
GstStructure *str;
|
||||
GstMessage *msg;
|
||||
|
||||
GST_MEMDUMP_OBJECT (filter, "BUFFER", data, GST_BUFFER_SIZE (buf));
|
||||
|
||||
str = gst_structure_empty_new ("HDV");
|
||||
|
||||
/* 0x1f - 0x23 : TimeCode */
|
||||
|
||||
if (data[0x1f] != 0xff) {
|
||||
guint8 tframe, tsec, tmin, thour;
|
||||
gchar *timecode = NULL;
|
||||
tframe = BCD (data[0x1f] & 0x3f);
|
||||
tsec = BCD (data[0x20] & 0x7f);
|
||||
tmin = BCD (data[0x21] & 0x7f);
|
||||
thour = BCD (data[0x22] & 0x3f);
|
||||
|
||||
timecode =
|
||||
g_strdup_printf ("%01d:%02d:%02d.%02d", thour, tmin, tsec, tframe);
|
||||
gst_structure_set (str, "timecode", G_TYPE_STRING, timecode, NULL);
|
||||
g_free (timecode);
|
||||
GST_LOG_OBJECT (filter, timecode);
|
||||
}
|
||||
|
||||
/* 0x23 : Timezone / Dailight Saving Time */
|
||||
/* 0x24 - 0x2a : Original time */
|
||||
if (data[0x23] != 0xff) {
|
||||
GDate *date = NULL;
|
||||
guint tzone = 0;
|
||||
guint day, month, year, hour, min, sec;
|
||||
gchar *datetime;
|
||||
|
||||
tzone = data[0x23];
|
||||
dst = !(tzone & 0x80);
|
||||
tzone =
|
||||
BCD (tzone & 0x1f) > 12 ? BCD (tzone & 0x1f) - 12 : BCD (tzone & 0x1f);
|
||||
GST_LOG_OBJECT (filter, "TimeZone : %d, DST : %d", tzone, dst);
|
||||
|
||||
day = BCD_M (data[0x24], 0x3f);
|
||||
month = BCD_M (data[0x25], 0x1f);
|
||||
year = BCD (data[0x26]);
|
||||
if (year > 90)
|
||||
year += 1900;
|
||||
else
|
||||
year += 2000;
|
||||
/* 0x27: ??? */
|
||||
sec = BCD_M (data[0x28], 0x7f);
|
||||
min = BCD_M (data[0x29], 0x7f);
|
||||
hour = BCD_M (data[0x2a], 0x3f);
|
||||
|
||||
/* FIXME : we need a date/time object ! */
|
||||
date = g_date_new_dmy (day, month, year);
|
||||
datetime =
|
||||
g_strdup_printf ("%02d/%02d/%02d %02d:%02d:%02d", day, month, year,
|
||||
hour, min, sec);
|
||||
gst_structure_set (str, "date", GST_TYPE_DATE, date, "recording-time",
|
||||
G_TYPE_STRING, datetime, NULL);
|
||||
g_free (datetime);
|
||||
GST_LOG_OBJECT (filter, datetime);
|
||||
}
|
||||
|
||||
/* 0x2b : Various flags, including scene-change */
|
||||
if (!((data[0x2b] & 0x20) >> 5)) {
|
||||
GST_LOG_OBJECT (filter, "Scene change !");
|
||||
gst_structure_set (str, "scene-change", G_TYPE_BOOLEAN, TRUE, NULL);
|
||||
}
|
||||
|
||||
/* Check for partials */
|
||||
if (GST_BUFFER_SIZE (buf) < 0x50) {
|
||||
goto beach;
|
||||
}
|
||||
|
||||
/* 0x43 : Aperture */
|
||||
apertured = data[0x43] & 0x3f;
|
||||
if (apertured < 35) {
|
||||
GST_LOG_OBJECT (filter, "Aperture : F%s", aperture_table[apertured]);
|
||||
gst_structure_set (str, "aperture", G_TYPE_STRING,
|
||||
aperture_table[apertured], NULL);
|
||||
} else {
|
||||
GST_LOG_OBJECT (filter, "Aperture : %d", apertured);
|
||||
}
|
||||
|
||||
/* 0x44 : Gain */
|
||||
gain = ((data[0x44] & 0xf) - 1) * 1.5;
|
||||
GST_LOG_OBJECT (filter, "Gain : %03f db", gain);
|
||||
gst_structure_set (str, "gain", G_TYPE_FLOAT, gain, NULL);
|
||||
|
||||
/* 0x4f - 0x50 : Shutter */
|
||||
shutter = get_shutter_speed (data[0x4f], data[0x50]);
|
||||
GST_LOG_OBJECT (filter, "Shutter speed : 1/%d", shutter);
|
||||
if (shutter)
|
||||
gst_structure_set (str, "shutter-speed", GST_TYPE_FRACTION, 1, shutter,
|
||||
NULL);
|
||||
|
||||
beach:
|
||||
msg = gst_message_new_element (GST_OBJECT (filter), str);
|
||||
gst_element_post_message (GST_ELEMENT (filter), msg);
|
||||
return;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue