diff options
Diffstat (limited to 'gst/hdvparse/gsthdvparse.c')
| -rw-r--r-- | gst/hdvparse/gsthdvparse.c | 199 |
1 files changed, 197 insertions, 2 deletions
diff --git a/gst/hdvparse/gsthdvparse.c b/gst/hdvparse/gsthdvparse.c index 0ea5cd20e..d069a363a 100644 --- a/gst/hdvparse/gsthdvparse.c +++ b/gst/hdvparse/gsthdvparse.c @@ -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; } |