]>
Commit | Line | Data |
---|---|---|
1 | use nihav_core::frame::*; | |
2 | use nihav_core::demuxers::*; | |
3 | ||
4 | #[derive(Clone,Copy)] | |
5 | struct Frame { | |
6 | off: u32, | |
7 | size: u32, | |
8 | bits_off: u8, | |
9 | } | |
10 | ||
11 | struct APEDemuxer<'a> { | |
12 | src: &'a mut ByteReader<'a>, | |
13 | cur_frame: usize, | |
14 | frames: Vec<Frame>, | |
15 | normal_blocks: u32, | |
16 | last_blocks: u32, | |
17 | truncated: bool, | |
18 | } | |
19 | ||
20 | impl<'a> APEDemuxer<'a> { | |
21 | fn new(io: &'a mut ByteReader<'a>) -> Self { | |
22 | Self { | |
23 | src: io, | |
24 | cur_frame: 0, | |
25 | frames: Vec::new(), | |
26 | normal_blocks: 0, | |
27 | last_blocks: 0, | |
28 | truncated: false, | |
29 | } | |
30 | } | |
31 | } | |
32 | ||
33 | impl<'a> DemuxCore<'a> for APEDemuxer<'a> { | |
34 | fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> { | |
35 | let src = &mut self.src; | |
36 | ||
37 | let tag = src.read_tag()?; | |
38 | validate!(&tag == b"MAC "); | |
39 | let version = src.read_u16le()?; | |
40 | validate!(version >= 3800 && version <= 3990); | |
41 | ||
42 | let seektab_len; | |
43 | let _wavtail_len; | |
44 | let compr_type; | |
45 | let flags; | |
46 | let blocksperframe; | |
47 | let finalblocks; | |
48 | let nframes; | |
49 | let bits; | |
50 | let channels; | |
51 | let srate; | |
52 | if version >= 3980 { | |
53 | src.read_skip(2)?; | |
54 | let descriptor_len = src.read_u32le()? as usize; | |
55 | let header_len = src.read_u32le()? as usize; | |
56 | validate!(header_len == 24); | |
57 | seektab_len = src.read_u32le()? as usize; | |
58 | let _wavheader_len = src.read_u32le()? as usize; | |
59 | let _audio_len = src.read_u64le()?; | |
60 | _wavtail_len = src.read_u32le()? as usize; | |
61 | src.read_skip(16)?; // unpacked data MD5 | |
62 | if descriptor_len > 52 { | |
63 | src.read_skip(descriptor_len - 52)?; | |
64 | } | |
65 | ||
66 | compr_type = src.read_u16le()?; | |
67 | flags = src.read_u16le()?; | |
68 | blocksperframe = src.read_u32le()?; | |
69 | finalblocks = src.read_u32le()?; | |
70 | nframes = src.read_u32le()? as usize; | |
71 | bits = src.read_u16le()?; | |
72 | channels = src.read_u16le()?; | |
73 | srate = src.read_u32le()?; | |
74 | } else { | |
75 | compr_type = src.read_u16le()?; | |
76 | flags = src.read_u16le()?; | |
77 | channels = src.read_u16le()?; | |
78 | srate = src.read_u32le()?; | |
79 | ||
80 | let wavheader_len = src.read_u32le()? as usize; | |
81 | _wavtail_len = src.read_u32le()? as usize; | |
82 | nframes = src.read_u32le()? as usize; | |
83 | finalblocks = src.read_u32le()?; | |
84 | if (flags & 0x04) != 0 { | |
85 | src.read_u32le()?; // peak level | |
86 | } | |
87 | if (flags & 0x10) != 0 { | |
88 | seektab_len = src.read_u32le()? as usize * 4; | |
89 | } else { | |
90 | seektab_len = nframes * 4; | |
91 | } | |
92 | ||
93 | if (flags & 0x01) != 0 { | |
94 | bits = 8; | |
95 | } else if (flags & 0x08) != 0 { | |
96 | bits = 24; | |
97 | } else { | |
98 | bits = 16; | |
99 | } | |
100 | ||
101 | blocksperframe = 9216 * if version >= 3950 { | |
102 | 32 | |
103 | } else if (version >= 3900) || ((version >= 3800) && (compr_type >= 4000)) { | |
104 | 8 | |
105 | } else { | |
106 | 1 | |
107 | }; | |
108 | ||
109 | if (flags & 0x20) == 0 { | |
110 | src.read_skip(wavheader_len)?; | |
111 | } | |
112 | } | |
113 | validate!(srate > 0); | |
114 | validate!(channels > 0 && channels < 256); | |
115 | validate!(bits > 0 && bits <= 32); | |
116 | validate!(nframes > 0 && nframes < (1 << 28)); | |
117 | validate!(seektab_len == nframes * 4); | |
118 | ||
119 | self.frames = Vec::with_capacity(nframes); | |
120 | self.normal_blocks = blocksperframe; | |
121 | self.last_blocks = finalblocks; | |
122 | ||
123 | seek_index.mode = SeekIndexMode::Present; | |
124 | let first_off = src.peek_u32le()?; | |
125 | validate!(u64::from(first_off) >= src.tell() + ((nframes * 4) as u64)); | |
126 | let mut last_off = first_off - 1; | |
127 | for i in 0..nframes { | |
128 | let off = src.read_u32le()?; | |
129 | validate!(off > last_off); | |
130 | let diff = (off - first_off) & 3; | |
131 | self.frames.push(Frame { | |
132 | off: off - diff, | |
133 | size: 0, | |
134 | bits_off: (diff as u8) * 8, | |
135 | }); | |
136 | ||
137 | last_off = off; | |
138 | ||
139 | let time = (i as u64) * u64::from(blocksperframe) * 1000 / u64::from(srate); | |
140 | seek_index.add_entry(0, SeekEntry { time, pts: i as u64, pos: i as u64 }); | |
141 | } | |
142 | if version < 3810 { | |
143 | for frame in self.frames.iter_mut() { | |
144 | let bits = src.read_byte()?; | |
145 | validate!(bits < 32); | |
146 | frame.bits_off += bits; | |
147 | } | |
148 | } | |
149 | src.seek(SeekFrom::End(0))?; | |
150 | let fsize = src.tell(); | |
151 | validate!(fsize > u64::from(self.frames[0].off)); | |
152 | self.truncated = u64::from(self.frames[self.frames.len() - 1].off) >= fsize; | |
153 | if self.truncated { | |
154 | let mut valid_frames = self.frames.len(); | |
155 | for frame in self.frames.iter_mut().rev() { | |
156 | if u64::from(frame.off) >= fsize { | |
157 | valid_frames -= 1; | |
158 | } | |
159 | } | |
160 | self.frames.truncate(valid_frames); | |
161 | validate!(!self.frames.is_empty()); | |
162 | self.truncated = true; | |
163 | } | |
164 | let mut last_off = fsize as u32; | |
165 | for frame in self.frames.iter_mut().rev() { | |
166 | frame.size = last_off - frame.off; | |
167 | last_off = frame.off + (if frame.bits_off > 0 { 4 } else { 0 }); | |
168 | } | |
169 | ||
170 | let mut hdr = vec![0u8; 16]; | |
171 | write_u16le(&mut hdr[0..], version)?; | |
172 | write_u16le(&mut hdr[2..], compr_type)?; | |
173 | write_u16le(&mut hdr[4..], flags)?; | |
174 | hdr[6] = channels as u8; | |
175 | hdr[7] = bits as u8; | |
176 | write_u32le(&mut hdr[8..], srate)?; | |
177 | write_u32le(&mut hdr[12..], blocksperframe)?; | |
178 | ||
179 | let ahdr = NAAudioInfo::new(srate, channels as u8, SND_S16P_FORMAT, 1); | |
180 | let ainfo = NACodecInfo::new("ape", NACodecTypeInfo::Audio(ahdr), Some(hdr)); | |
181 | strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, blocksperframe, srate)).unwrap(); | |
182 | ||
183 | self.cur_frame = 0; | |
184 | ||
185 | Ok(()) | |
186 | } | |
187 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> { | |
188 | if self.cur_frame >= self.frames.len() { | |
189 | return Err(DemuxerError::EOF); | |
190 | } | |
191 | ||
192 | let size = self.frames[self.cur_frame].size as usize; | |
193 | let off = self.frames[self.cur_frame].off; | |
194 | let bits = self.frames[self.cur_frame].bits_off; | |
195 | let nblocks = if (self.cur_frame < self.frames.len() - 1) || self.truncated { self.normal_blocks } else { self.last_blocks }; | |
196 | ||
197 | self.src.seek(SeekFrom::Start(off.into()))?; | |
198 | ||
199 | let mut buf = vec![0u8; size + 8]; | |
200 | write_u32le(&mut buf[0..], nblocks)?; | |
201 | buf[4] = bits; | |
202 | self.src.read_buf(&mut buf[8..])?; | |
203 | ||
204 | let stream = strmgr.get_stream(0).unwrap(); | |
205 | let (tb_num, tb_den) = stream.get_timebase(); | |
206 | let ts = NATimeInfo::new(Some(self.cur_frame as u64), None, None, tb_num, tb_den); | |
207 | let pkt = NAPacket::new(stream, ts, true, buf); | |
208 | ||
209 | self.cur_frame += 1; | |
210 | ||
211 | Ok(pkt) | |
212 | } | |
213 | fn seek(&mut self, time: NATimePoint, seek_index: &SeekIndex) -> DemuxerResult<()> { | |
214 | let ret = seek_index.find_pos(time); | |
215 | if ret.is_none() { | |
216 | return Err(DemuxerError::SeekError); | |
217 | } | |
218 | let seek_info = ret.unwrap(); | |
219 | self.cur_frame = seek_info.pts as usize; | |
220 | if self.cur_frame >= self.frames.len() { | |
221 | return Err(DemuxerError::SeekError); | |
222 | } | |
223 | ||
224 | Ok(()) | |
225 | } | |
226 | } | |
227 | ||
228 | impl<'a> NAOptionHandler for APEDemuxer<'a> { | |
229 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } | |
230 | fn set_options(&mut self, _options: &[NAOption]) { } | |
231 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } | |
232 | } | |
233 | ||
234 | pub struct APEDemuxerCreator { } | |
235 | ||
236 | impl DemuxerCreator for APEDemuxerCreator { | |
237 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> { | |
238 | Box::new(APEDemuxer::new(br)) | |
239 | } | |
240 | fn get_name(&self) -> &'static str { "ape" } | |
241 | } | |
242 | ||
243 | #[cfg(test)] | |
244 | mod test { | |
245 | use super::*; | |
246 | use std::fs::File; | |
247 | ||
248 | #[test] | |
249 | fn test_ape_demux() { | |
250 | let mut file = File::open("assets/LLaudio/ape/luckynight.ape").unwrap(); | |
251 | let mut fr = FileReader::new_read(&mut file); | |
252 | let mut br = ByteReader::new(&mut fr); | |
253 | let mut dmx = APEDemuxer::new(&mut br); | |
254 | let mut sm = StreamManager::new(); | |
255 | let mut si = SeekIndex::new(); | |
256 | dmx.open(&mut sm, &mut si).unwrap(); | |
257 | loop { | |
258 | let pktres = dmx.get_frame(&mut sm); | |
259 | if let Err(e) = pktres { | |
260 | if (e as i32) == (DemuxerError::EOF as i32) { break; } | |
261 | panic!("error"); | |
262 | } | |
263 | let pkt = pktres.unwrap(); | |
264 | println!("Got {}", pkt); | |
265 | } | |
266 | } | |
267 | } |