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