isomp4: add support for Opus in mp4mpux
Add support for muxing MP4 files containing Opus. Based on the spec
detailed here:
https://www.opus-codec.org/docs/opus_in_isobmff.html
https://bugzilla.gnome.org/show_bug.cgi?id=742643
diff --git a/gst/isomp4/atoms.c b/gst/isomp4/atoms.c
index 84b3d80..efebf2d 100644
--- a/gst/isomp4/atoms.c
+++ b/gst/isomp4/atoms.c
@@ -4728,6 +4728,44 @@
}
AtomInfo *
+build_opus_extension (guint32 rate, guint8 channels, guint8 mapping_family,
+ guint8 stream_count, guint8 coupled_count, guint8 channel_mapping[256],
+ guint16 pre_skip, guint16 output_gain)
+{
+ AtomData *atom_data;
+ guint8 *data_block;
+ GstByteWriter bw;
+ gboolean hdl = TRUE;
+ guint data_block_len;
+
+ gst_byte_writer_init (&bw);
+ hdl &= gst_byte_writer_put_uint8 (&bw, 0x00); /* version number */
+ hdl &= gst_byte_writer_put_uint8 (&bw, channels);
+ hdl &= gst_byte_writer_put_uint16_le (&bw, pre_skip);
+ hdl &= gst_byte_writer_put_uint32_le (&bw, rate);
+ hdl &= gst_byte_writer_put_uint16_le (&bw, output_gain);
+ hdl &= gst_byte_writer_put_uint8 (&bw, mapping_family);
+ if (mapping_family > 0) {
+ hdl &= gst_byte_writer_put_uint8 (&bw, stream_count);
+ hdl &= gst_byte_writer_put_uint8 (&bw, coupled_count);
+ hdl &= gst_byte_writer_put_data (&bw, channel_mapping, channels);
+ }
+
+ if (!hdl) {
+ GST_WARNING ("Error creating header");
+ return NULL;
+ }
+
+ data_block_len = gst_byte_writer_get_size (&bw);
+ data_block = gst_byte_writer_reset_and_get_data (&bw);
+ atom_data = atom_data_new_from_data (FOURCC_dops, data_block, data_block_len);
+ g_free (data_block);
+
+ return build_atom_info_wrapper ((Atom *) atom_data, atom_data_copy_data,
+ atom_data_free);
+}
+
+AtomInfo *
build_uuid_xmp_atom (GstBuffer * xmp_data)
{
AtomUUID *uuid;
