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qtdemux: Handle mp4a without ESDS atom

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=736986
This commit is contained in:
Matej Knopp 2014-09-19 19:14:28 +02:00 committed by Thiago Santos
parent 5fc970d686
commit 8a4931726d
1 changed files with 33 additions and 0 deletions
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33
gst/isomp4/qtdemux.c
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@ -8694,6 +8694,39 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
}
break;
}
case FOURCC_mp4a:
{
/* mp4a atom withtout ESDS; Attempt to build codec data from atom */
gint len = QT_UINT32 (stsd_data);
if (len >= 50) {
guint16 sound_version = QT_UINT16 (stsd_data + 32);
if (sound_version == 1) {
guint16 channels = QT_UINT16 (stsd_data + 40);
guint32 time_scale = QT_UINT32 (stsd_data + 46);
guint8 codec_data[2];
GstBuffer *buf;
gint profile = 2; /* FIXME: Can this be determined somehow? There doesn't seem to be anything in mp4a atom that specifis compression */
gint sample_rate_index =
gst_codec_utils_aac_get_index_from_sample_rate (time_scale);
/* build AAC codec data */
codec_data[0] = profile << 3;
codec_data[0] |= ((sample_rate_index >> 1) & 0x7);
codec_data[1] = (sample_rate_index & 0x01) << 7;
codec_data[1] |= (channels & 0xF) << 3;
buf = gst_buffer_new_and_alloc (2);
gst_buffer_fill (buf, 0, codec_data, 2);
gst_caps_set_simple (stream->caps,
"codec_data", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_unref (buf);
}
}
break;
}
default:
GST_INFO_OBJECT (qtdemux,
"unhandled type %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));