+#[derive(Clone,Copy,Debug)]
+struct InterleaveInfo {
+ id: u32,
+ factor: u16,
+ block_size: u16,
+ frame_size: u16,
+}
+
+#[derive(Clone,Copy,Debug)]
+struct RealAudioInfo {
+ fcc: u32,
+ sample_rate: u32,
+ sample_size: u16,
+ channels: u16,
+ channel_mask: u32,
+ granularity: u32,
+ bytes_per_minute: u32,
+ total_bytes: u32,
+ edata_size: u32,
+ ileave_info: Option<InterleaveInfo>
+}
+
+fn skip_ra_metadata(src: &mut ByteReader) -> DemuxerResult<()> {
+ let title_len = src.read_byte()? as usize;
+ src.read_skip(title_len)?;
+ let author_len = src.read_byte()? as usize;
+ src.read_skip(author_len)?;
+ let copywrong_len = src.read_byte()? as usize;
+ src.read_skip(copywrong_len)?;
+ let comment_len = src.read_byte()? as usize;
+ src.read_skip(comment_len)?;
+ Ok(())
+}
+
+#[allow(unused_variables)]
+fn parse_aformat3(src: &mut ByteReader) -> DemuxerResult<RealAudioInfo> {
+ let start = src.tell();
+ let header_len = src.read_u16be()?;
+ validate!(header_len >= 24);
+ let flavor = src.read_u16be()?;
+ let granularity = src.read_u32be()?;
+ let bytes_per_minute = src.read_u32be()?;
+ let total_bytes = src.read_u32be()?;
+
+ skip_ra_metadata(src)?;
+
+ let _can_copy = src.read_byte()?;
+ let fcc_len = src.read_byte()?;
+ validate!(fcc_len == 4);
+ let fcc = src.read_u32be()?;
+
+ let end = src.tell();
+ validate!(end - start <= (header_len as u64) + 2);
+
+ Ok(RealAudioInfo {
+ fcc: fcc, sample_rate: 8000, sample_size: 16, channels: 1, channel_mask: 0,
+ granularity: granularity, bytes_per_minute: bytes_per_minute,
+ total_bytes: total_bytes, edata_size: 0,
+ ileave_info: None,
+ })
+}
+
+#[allow(unused_variables)]
+fn parse_aformat4(src: &mut ByteReader) -> DemuxerResult<RealAudioInfo> {
+ let start = src.tell();
+ src.read_skip(2)?; // zeroes
+ let id = src.read_u32be()?;
+ validate!(id == mktag!(b".ra4"));
+ let data_size = src.read_u32be()?;
+ let _ver4 = src.read_u16be()?; // should be 4
+ let header_size = src.read_u32be()?;
+ let _flavor = src.read_u16be()?;
+ let granularity = src.read_u32be()?;
+ let total_bytes = src.read_u32be()?;
+ let bytes_per_minute = src.read_u32be()?;
+ let _bytes_per_minute2 = src.read_u32be()?;
+ let ileave_factor = src.read_u16be()?;
+ let ileave_block_size = src.read_u16be()?;
+ let _user_data = src.read_u16be()?;
+ let sample_rate = src.read_u32be()?;
+ let sample_size = src.read_u32be()?;
+ let channels = src.read_u16be()?;
+ let interleaver_id_len = src.read_byte()?;
+ validate!(interleaver_id_len == 4);
+ let interleaver_id = src.read_u32be()?;
+ let fcc_len = src.read_byte()?;
+ validate!(fcc_len == 4);
+ let fcc = src.read_u32be()?;
+ let is_interleaved = src.read_byte()?;
+ let _can_copy = src.read_byte()?;
+ let _stream_type = src.read_byte()?;
+
+ skip_ra_metadata(src)?;
+
+ let end = src.tell();
+ validate!(end - start <= (header_size as u64) + 10);
+
+ let ileave_info = if is_interleaved != 0 {
+ Some(InterleaveInfo {
+ id: interleaver_id, factor: ileave_factor, block_size: ileave_block_size, frame_size: 0,
+ })
+ } else {
+ None
+ };
+
+ Ok(RealAudioInfo {
+ fcc: fcc, sample_rate: sample_rate, sample_size: sample_size as u16, channels: channels, channel_mask: 0,
+ granularity: granularity, bytes_per_minute: bytes_per_minute,
+ total_bytes: total_bytes & 0xFFFFFF, edata_size: 0,
+ ileave_info: ileave_info,
+ })
+}
+
+#[allow(unused_variables)]
+fn parse_aformat5(src: &mut ByteReader) -> DemuxerResult<RealAudioInfo> {
+ let start = src.tell();
+ src.read_skip(2)?; // zeroes
+ let id = src.read_u32be()?;
+ validate!(id == mktag!(b".ra5"));
+ let data_size = src.read_u32be()?;
+ let _ver5 = src.read_u16be()?; // should be 5
+ let header_size = src.read_u32be()?;
+ let _flavor = src.read_u16be()?;
+ let granularity = src.read_u32be()?;
+ let total_bytes = src.read_u32be()?;
+ let bytes_per_minute = src.read_u32be()?;
+ let _bytes_per_minute2 = src.read_u32be()?;
+ let ileave_factor = src.read_u16be()?;
+ let ileave_block_size = src.read_u16be()?;
+ let frame_size = src.read_u16be()?;
+ let user_data = src.read_u32be()?;
+ let _sample_rate1 = src.read_u16be()?;
+ let sample_rate = src.read_u32be()?;
+ let sample_size = src.read_u32be()?;
+ let channels = src.read_u16be()?;
+ let interleaver_id = src.read_u32be()?;
+ let fcc = src.read_u32be()?;
+ let is_interleaved = src.read_byte()?;
+ let _can_copy = src.read_byte()?;
+ let _stream_type = src.read_byte()?;
+ let has_ileave_pattern = src.read_byte()?;
+ if has_ileave_pattern != 0 {
+unimplemented!("ra5 interleave pattern");
+ }
+ let edata_size = src.read_u32be()?;
+
+ let end = src.tell();
+ validate!(end - start <= (header_size as u64) + 10);
+ src.read_skip((end as usize) - (header_size as usize))?;
+
+ let ileave_info = if is_interleaved != 0 {
+ Some(InterleaveInfo {
+ id: interleaver_id, factor: ileave_factor, block_size: ileave_block_size, frame_size: frame_size,
+ })
+ } else {
+ None
+ };
+
+ Ok(RealAudioInfo {
+ fcc: fcc, sample_rate: sample_rate, sample_size: sample_size as u16, channels: channels, channel_mask: 0,
+ granularity: granularity, bytes_per_minute: bytes_per_minute,
+ total_bytes: total_bytes & 0xFFFFFF, edata_size: edata_size,
+ ileave_info: ileave_info,
+ })
+}
+