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typefinding: add channels and rate to ADTS caps if we can

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This commit is contained in:
Tim-Philipp Müller 2010-04-12 14:02:34 +01:00
parent 43a04483d9
commit 555a3a5d14
1 changed files with 22 additions and 16 deletions
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38
gst/typefind/gsttypefindfunctions.c
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@ -686,8 +686,10 @@ aac_type_find (GstTypeFind * tf, gpointer unused)
goto next;
}
/* check if there's a second ADTS frame */
snc = GST_READ_UINT16_BE (c.data + len);
if ((snc & 0xfff6) == 0xfff0) {
GstCaps *caps;
guint mpegversion, sample_freq_idx, channel_config, profile, rate;
gint level;
@ -713,29 +715,33 @@ aac_type_find (GstTypeFind * tf, gpointer unused)
/* ADTS counts profiles from 0 instead of 1 to save bits */
level = gst_aac_level_from_header (profile + 1, rate, channel_config);
if (level == -1) {
/* Could not determine the level */
gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, mpegversion,
"stream-type", G_TYPE_STRING, "adts",
"base-profile", G_TYPE_STRING, profile_to_string[profile],
"profile", G_TYPE_STRING, profile_to_string[profile], NULL);
} else {
caps = gst_caps_new_simple ("audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, mpegversion,
"stream-type", G_TYPE_STRING, "adts",
"base-profile", G_TYPE_STRING, profile_to_string[profile],
"profile", G_TYPE_STRING, profile_to_string[profile], NULL);
if (level != -1) {
gchar level_str[16];
/* we use a string here because h.264 levels are also strings and
* there aren't a lot of levels, so it's not too awkward to not use
* and integer here and keep the field type consistent with h.264 */
g_snprintf (level_str, sizeof (level_str), "%d", level);
gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, mpegversion,
"stream-type", G_TYPE_STRING, "adts",
"base-profile", G_TYPE_STRING, profile_to_string[profile],
"profile", G_TYPE_STRING, profile_to_string[profile],
"level", G_TYPE_STRING, level_str, NULL);
gst_caps_set_simple (caps, "level", G_TYPE_STRING, level_str, NULL);
}
/* add rate and number of channels if we can */
if (channel_config != 0 && channel_config <= 7) {
const guint channels_map[] = { 0, 1, 2, 3, 4, 5, 6, 8 };
gst_caps_set_simple (caps, "channels", G_TYPE_INT,
channels_map[channel_config], "rate", G_TYPE_INT, rate, NULL);
}
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
gst_caps_unref (caps);
break;
}