1 use std::collections::VecDeque;
2 use nihav_core::frame::*;
3 use nihav_core::muxers::*;
4 use super::RMStreamWriter;
6 static VIDEO_CODEC_REGISTRY: &[(&[u8;4], &str)] = &[
7 (b"RV10", "realvideo1"),
8 (b"RV20", "realvideo2"),
9 (b"RVTR", "realvideo2"),
10 (b"RV30", "realvideo3"),
11 (b"RV40", "realvideo4"),
12 (b"RV60", "realvideo6"),
13 (b"CLV1", "clearvideo_rm"),
16 pub struct DummyStreamWriter {}
17 impl RMStreamWriter for DummyStreamWriter {
18 fn write_header(&mut self, _bw: &mut ByteWriter, _stream: &NAStream) -> MuxerResult<()> {
21 fn queue_packet(&mut self, _pkt: NAPacket, _ms: u32) -> bool {
24 fn get_packet(&mut self) -> Option<(Vec<u8>, u32, bool)> {
27 fn flush(&mut self) { }
28 fn finish(&mut self, _bw: &mut ByteWriter) -> MuxerResult<()> {
31 fn set_pkt_size(&mut self, _pkt_size: usize) {}
37 Slice{pkt_no: u8, npkt: u8, full_size: u32, offset: u32},
41 fn is_frame(self) -> bool { matches!(self, VideoDataType::Frame) }
44 fn val_to_size(val: u32) -> usize { if val < (1 << 14) { 2 } else { 4 } }
55 fn get_pkt_len(&self) -> usize {
56 let plen = self.data.len();
57 let ts_size = val_to_size(self.pts);
59 VideoDataType::Frame => plen + val_to_size(plen as u32) + ts_size + 2,
60 VideoDataType::Slice{pkt_no: _, npkt: _, full_size, offset} => plen + val_to_size(full_size) + val_to_size(offset) + 3,
65 struct VideoStreamWriter {
71 queue: VecDeque<VideoData>,
75 impl RMStreamWriter for VideoStreamWriter {
76 fn write_header(&mut self, bw: &mut ByteWriter, vstream: &NAStream) -> MuxerResult<()> {
77 let info = vstream.get_info().get_properties().get_video_info().unwrap();
78 let start = bw.tell();
80 bw.write_u32be(0)?; // header size
81 bw.write_buf(b"VIDO")?;
82 bw.write_buf(&self.fcc)?;
83 bw.write_u16be(info.width as u16)?;
84 bw.write_u16be(info.height as u16)?;
85 bw.write_u16be(12)?; // bpp
86 bw.write_u16be(0)?; // aligned width
87 bw.write_u16be(0)?; // aligned height
88 let (tb_num, tb_den) = vstream.get_timebase();
89 if tb_num != 0 && tb_den != 0 {
90 bw.write_u16be((tb_den / tb_num) as u16)?;
91 let mut fps_frac = tb_den % tb_num;
93 while div >= 0x10000 {
97 fps_frac = (fps_frac << 16) / div;
98 bw.write_u16le(fps_frac as u16)?;
104 if let Some(edata) = vstream.get_info().get_extradata() {
105 bw.write_buf(&edata)?;
108 bw.seek(SeekFrom::Start(start))?;
109 bw.write_u32be((end - start) as u32)?;
110 bw.seek(SeekFrom::Start(end))?;
113 fn queue_packet(&mut self, pkt: NAPacket, ms: u32) -> bool {
114 let tot_size = self.queue.iter().fold(0usize, |acc, q| acc + q.get_pkt_len());
115 if tot_size > self.pkt_size {
121 self.mi_time = ms.max(self.mi_time + 1);
124 let src = pkt.get_buffer();
125 let nslices = usize::from(src[0]) + 1;
126 let hdr_size = nslices * 8 + 1;
129 self.queue.push_back(VideoData {
130 vtype: VideoDataType::Frame,
133 data: src[9..].to_vec(),
135 } else if src.len() > hdr_size {
136 let mut slice_sizes = [0; 256];
137 let mut slice_offs = [0; 256];
139 for (el, src) in slice_offs.iter_mut().zip(src[1..].chunks_exact(8)) {
140 *el = read_u32be(&src[4..]).unwrap() as usize;
142 for (dst, offs) in slice_sizes[..nslices - 1].iter_mut().zip(slice_offs.windows(2)) {
143 *dst = offs[1] - offs[0];
145 slice_sizes[nslices - 1] = src.len() - hdr_size - slice_offs[nslices - 1];
147 let src = &src[hdr_size..];
148 let full_size = src.len() as u32;
149 let npkt = nslices as u8;
150 for (pkt_no, (&offset, &size)) in slice_offs.iter().zip(slice_sizes.iter()).take(nslices).enumerate() {
151 let vtype = VideoDataType::Slice{pkt_no: (pkt_no + 1) as u8, npkt, full_size, offset: offset as u32};
152 self.queue.push_back(VideoData {
156 data: src[offset..][..size].to_vec(),
161 self.seq_no = self.seq_no.wrapping_add(1);
165 fn get_packet(&mut self) -> Option<(Vec<u8>, u32, bool)> {
166 if self.queue.is_empty() {
169 let tot_size = self.queue.iter().fold(0usize, |acc, q| acc + q.get_pkt_len());
170 if tot_size < self.pkt_size && !self.flush {
173 let mut pkt_buf = Vec::new();
175 let first = self.queue.pop_front().unwrap();
176 let is_first = match first.vtype {
177 VideoDataType::Frame => true,
178 VideoDataType::Slice{pkt_no, npkt: _, full_size: _, offset: _} => pkt_no == 1,
180 if self.queue.is_empty() || (first.get_pkt_len() + self.queue[0].get_pkt_len() + 4 > self.pkt_size) {
182 VideoDataType::Frame => {
183 pkt_buf.push(0x40); // 0x1 = whole frame
184 pkt_buf.push(first.seq_no);
185 pkt_buf.extend_from_slice(&first.data);
187 VideoDataType::Slice{pkt_no, npkt, full_size: _, offset: _} => {
188 let id = if pkt_no == npkt { 2 } else { 0 };
189 write_slice(&mut pkt_buf, id, &first);
193 let second = &self.queue[0];
194 match (first.vtype.is_frame(), second.vtype.is_frame()) {
196 write_multiple_frame(&mut pkt_buf, &first);
197 while !self.queue.is_empty() && self.queue[0].vtype.is_frame() && (pkt_buf.len() + self.queue[0].get_pkt_len() < self.pkt_size) {
198 let frm = self.queue.pop_front().unwrap();
199 write_multiple_frame(&mut pkt_buf, &frm);
203 pkt_buf.push(0x40); // 0x1 = whole frame
204 pkt_buf.push(first.seq_no);
205 pkt_buf.extend_from_slice(&first.data);
208 write_slice(&mut pkt_buf, 2, &first);
209 while !self.queue.is_empty() && self.queue[0].vtype.is_frame() && (pkt_buf.len() + self.queue[0].get_pkt_len() < self.pkt_size) {
210 let frm = self.queue.pop_front().unwrap();
211 write_multiple_frame(&mut pkt_buf, &frm);
215 if let VideoDataType::Slice{pkt_no, npkt, full_size: _, offset: _} = first.vtype {
216 let id = if pkt_no == npkt { 2 } else { 0 };
217 write_slice(&mut pkt_buf, id, &first);
224 Some((pkt_buf, first.pts, is_first))
226 fn flush(&mut self) {
229 fn finish(&mut self, _bw: &mut ByteWriter) -> MuxerResult<()> {
232 fn set_pkt_size(&mut self, pkt_size: usize) {
233 self.pkt_size = pkt_size;
237 fn write_16_or_32(dst: &mut Vec<u8>, val: u32) {
239 dst.push((1 << 6) | ((val >> 8) as u8));
242 dst.push((val >> 24) as u8);
243 dst.push((val >> 16) as u8);
244 dst.push((val >> 8) as u8);
245 dst.push( val as u8);
249 fn write_multiple_frame(dst: &mut Vec<u8>, frm: &VideoData) {
250 dst.push(0xC0); // 0x3 = multiple frame
251 write_16_or_32(dst, frm.data.len() as u32);
252 write_16_or_32(dst, frm.pts as u32);
253 dst.push(frm.seq_no);
254 dst.extend_from_slice(&frm.data);
257 fn write_slice(dst: &mut Vec<u8>, id: u8, src: &VideoData) {
258 if let VideoDataType::Slice{pkt_no, npkt, full_size, offset} = src.vtype {
259 dst.push((id << 6) | (npkt >> 1));
260 dst.push((npkt << 7) | pkt_no);
261 write_16_or_32(dst, full_size);
263 write_16_or_32(dst, offset);
265 write_16_or_32(dst, src.data.len() as u32);
267 dst.push(src.seq_no);
268 dst.extend_from_slice(&src.data);
274 pub fn create_video_stream(stream: &NAStream, pkt_size: usize) -> MuxerResult<Box<dyn RMStreamWriter>> {
275 let info = stream.get_info();
276 let cname = info.get_name();
278 for &(fcc, name) in VIDEO_CODEC_REGISTRY.iter() {
280 return Ok(Box::new(VideoStreamWriter {
286 queue: VecDeque::new(),
291 Err(MuxerError::UnsupportedFormat)