count = aac_type_find_scan_loas_frames (tf, &c, 20);
if (count >= 3 && count > best_count) {
- gst_caps_unref (best_caps);
+ gst_caps_replace (&best_caps, NULL);
best_caps = gst_caps_new_simple ("audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, 4,
g_return_if_fail (layer >= 1 && layer <= 3);
gst_type_find_suggest_simple (tf, prob, "audio/mpeg",
- "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
+ "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer,
+ "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
}
}
gst_type_find_suggest_simple (tf, probability, "video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
- "mpegversion", G_TYPE_INT, 1, NULL);
+ "mpegversion", G_TYPE_INT, 1, "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
}
}
}
}
+/*** audio/x-sbc ***/
+static GstStaticCaps sbc_caps = GST_STATIC_CAPS ("audio/x-sbc");
+#define SBC_CAPS (gst_static_caps_get(&sbc_caps))
+
+static gsize
+sbc_check_header (const guint8 * data, gsize len, guint * rate,
+ guint * channels)
+{
+ static const guint16 sbc_rates[4] = { 16000, 32000, 44100, 48000 };
+ static const guint8 sbc_blocks[4] = { 4, 8, 12, 16 };
+ guint n_blocks, ch_mode, n_subbands, bitpool;
+
+ if (data[0] != 0x9C || len < 4)
+ return 0;
+
+ n_blocks = sbc_blocks[(data[1] >> 4) & 0x03];
+ ch_mode = (data[1] >> 2) & 0x03;
+ n_subbands = (data[1] & 0x01) ? 8 : 4;
+ bitpool = data[2];
+ if (bitpool < 2)
+ return 0;
+
+ *rate = sbc_rates[(data[1] >> 6) & 0x03];
+ *channels = (ch_mode == 0) ? 1 : 2;
+
+ if (ch_mode == 0)
+ return 4 + (n_subbands * 1) / 2 + (n_blocks * 1 * bitpool) / 8;
+ else if (ch_mode == 1)
+ return 4 + (n_subbands * 2) / 2 + (n_blocks * 2 * bitpool) / 8;
+ else if (ch_mode == 2)
+ return 4 + (n_subbands * 2) / 2 + (n_blocks * bitpool) / 8;
+ else if (ch_mode == 3)
+ return 4 + (n_subbands * 2) / 2 + (n_subbands + n_blocks * bitpool) / 8;
+
+ return 0;
+}
+
+static void
+sbc_type_find (GstTypeFind * tf, gpointer unused)
+{
+ const guint8 *data;
+ gsize frame_len;
+ guint i, rate, channels, offset = 0;
+
+ for (i = 0; i < 10; ++i) {
+ data = gst_type_find_peek (tf, offset, 8);
+ if (data == NULL)
+ return;
+
+ frame_len = sbc_check_header (data, 8, &rate, &channels);
+ if (frame_len == 0)
+ return;
+
+ offset += frame_len;
+ }
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE, "audio/x-sbc",
+ "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels,
+ "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
+}
+
/*** audio/iLBC-sh ***/
/* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
"application/octet-stream", NULL);
}
+/* SSA/ASS subtitles
+ *
+ * http://en.wikipedia.org/wiki/SubStation_Alpha
+ * http://matroska.org/technical/specs/subtitles/ssa.html
+ */
+static void
+ssa_type_find (GstTypeFind * tf, gpointer private)
+{
+ const gchar *start, *end, *ver_str, *media_type = NULL;
+ const guint8 *data;
+ gchar *str, *script_type, *p = NULL;
+ gint64 len;
+
+ data = gst_type_find_peek (tf, 0, 32);
+
+ if (data == NULL)
+ return;
+
+ /* there might be a BOM at the beginning */
+ if (memcmp (data, "[Script Info]", 13) != 0 &&
+ memcmp (data + 2, "[Script Info]", 13) != 0 &&
+ memcmp (data + 3, "[Script Info]", 13) != 0 &&
+ memcmp (data + 4, "[Script Info]", 13) != 0) {
+ return;
+ }
+
+ /* now check if we have SSA or ASS */
+ len = gst_type_find_get_length (tf);
+ if (len > 8192)
+ len = 8192;
+
+ data = gst_type_find_peek (tf, 0, len);
+ if (data == NULL)
+ return;
+
+ /* skip BOM */
+ start = (gchar *) memchr (data, '[', 5);
+ g_assert (start);
+ len -= (start - (gchar *) data);
+
+ /* ignore anything non-UTF8 for now, in future we might at least allow
+ * other UTF variants that are clearly prefixed with the appropriate BOM */
+ if (!g_utf8_validate (start, len, &end) && (len - (end - start)) > 6) {
+ GST_FIXME ("non-UTF8 SSA/ASS file");
+ return;
+ }
+
+ /* something at start, but not a UTF-8 BOM? */
+ if (data[0] != '[' && (data[0] != 0xEF || data[1] != 0xBB || data[2] != 0xBF))
+ return;
+
+ /* ignore any partial UTF-8 characters at the end */
+ len = end - start;
+
+ /* create a NUL-terminated string so it's easier to process it safely */
+ str = g_strndup (start, len - 1);
+ script_type = strstr (str, "ScriptType:");
+ if (script_type != NULL) {
+ gdouble version;
+
+ ver_str = script_type + 11;
+ while (*ver_str == ' ' || *ver_str == 'v' || *ver_str == 'V')
+ ++ver_str;
+ version = g_ascii_strtod (ver_str, &p);
+ if (version == 4.0 && p != NULL && *p == '+')
+ media_type = "application/x-ass";
+ else if (version >= 1.0 && version <= 4.0)
+ media_type = "application/x-ssa";
+ }
+
+ if (media_type == NULL) {
+ if (strstr (str, "[v4+ Styles]") || strstr (str, "[V4+ Styles]"))
+ media_type = "application/x-ass";
+ else if (strstr (str, "[v4 Styles]") || strstr (str, "[V4 Styles]"))
+ media_type = "application/x-ssa";
+ }
+
+ if (media_type != NULL) {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
+ media_type, "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
+ } else {
+ GST_WARNING ("could not detect SSA/ASS variant");
+ }
+
+ g_free (str);
+}
+
/*** generic typefind for streams that have some data at a specific position***/
typedef struct
{
"amr", "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY, ilbc_type_find,
"ilbc", ILBC_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-sbc", GST_RANK_MARGINAL, sbc_type_find,
+ "sbc", SBC_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
"sid", "PSID", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
TYPE_FIND_REGISTER (plugin, "application/octet-stream", GST_RANK_MARGINAL,
dvdiso_type_find, NULL, NULL, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ssa", GST_RANK_SECONDARY,
+ ssa_type_find, "ssa,ass", NULL, NULL, NULL);
+
return TRUE;
}
projects / platform / upstream / gstreamer.git / blobdiff