ffmpeg_next_crossfix/codec/packet/
packet.rs

1use std::marker::PhantomData;
2use std::mem;
3use std::slice;
4
5use super::{Borrow, Flags, Mut, Ref, SideData};
6use ffi::*;
7use libc::c_int;
8use {format, Error, Rational};
9
10pub struct Packet(AVPacket);
11
12unsafe impl Send for Packet {}
13unsafe impl Sync for Packet {}
14
15impl Packet {
16    #[inline(always)]
17    pub unsafe fn is_empty(&self) -> bool {
18        self.0.size == 0
19    }
20}
21
22impl Packet {
23    #[inline]
24    pub fn empty() -> Self {
25        unsafe {
26            let mut pkt: AVPacket = mem::zeroed();
27
28            av_init_packet(&mut pkt);
29
30            Packet(pkt)
31        }
32    }
33
34    #[inline]
35    pub fn new(size: usize) -> Self {
36        unsafe {
37            let mut pkt: AVPacket = mem::zeroed();
38
39            av_init_packet(&mut pkt);
40            av_new_packet(&mut pkt, size as c_int);
41
42            Packet(pkt)
43        }
44    }
45
46    #[inline]
47    pub fn copy(data: &[u8]) -> Self {
48        use std::io::Write;
49
50        let mut packet = Packet::new(data.len());
51        packet.data_mut().unwrap().write_all(data).unwrap();
52
53        packet
54    }
55
56    #[inline]
57    pub fn borrow(data: &[u8]) -> Borrow {
58        Borrow::new(data)
59    }
60
61    #[inline]
62    pub fn shrink(&mut self, size: usize) {
63        unsafe {
64            av_shrink_packet(&mut self.0, size as c_int);
65        }
66    }
67
68    #[inline]
69    pub fn grow(&mut self, size: usize) {
70        unsafe {
71            av_grow_packet(&mut self.0, size as c_int);
72        }
73    }
74
75    #[inline]
76    pub fn rescale_ts<S, D>(&mut self, source: S, destination: D)
77    where
78        S: Into<Rational>,
79        D: Into<Rational>,
80    {
81        unsafe {
82            av_packet_rescale_ts(
83                self.as_mut_ptr(),
84                source.into().into(),
85                destination.into().into(),
86            );
87        }
88    }
89
90    #[inline]
91    pub fn flags(&self) -> Flags {
92        Flags::from_bits_truncate(self.0.flags)
93    }
94
95    #[inline]
96    pub fn set_flags(&mut self, value: Flags) {
97        self.0.flags = value.bits();
98    }
99
100    #[inline]
101    pub fn is_key(&self) -> bool {
102        self.flags().contains(Flags::KEY)
103    }
104
105    #[inline]
106    pub fn is_corrupt(&self) -> bool {
107        self.flags().contains(Flags::CORRUPT)
108    }
109
110    #[inline]
111    pub fn stream(&self) -> usize {
112        self.0.stream_index as usize
113    }
114
115    #[inline]
116    pub fn set_stream(&mut self, index: usize) {
117        self.0.stream_index = index as c_int;
118    }
119
120    #[inline]
121    pub fn pts(&self) -> Option<i64> {
122        match self.0.pts {
123            AV_NOPTS_VALUE => None,
124            pts => Some(pts as i64),
125        }
126    }
127
128    #[inline]
129    pub fn set_pts(&mut self, value: Option<i64>) {
130        self.0.pts = value.unwrap_or(AV_NOPTS_VALUE);
131    }
132
133    #[inline]
134    pub fn dts(&self) -> Option<i64> {
135        match self.0.dts {
136            AV_NOPTS_VALUE => None,
137            dts => Some(dts as i64),
138        }
139    }
140
141    #[inline]
142    pub fn set_dts(&mut self, value: Option<i64>) {
143        self.0.dts = value.unwrap_or(AV_NOPTS_VALUE);
144    }
145
146    #[inline]
147    pub fn size(&self) -> usize {
148        self.0.size as usize
149    }
150
151    #[inline]
152    pub fn duration(&self) -> i64 {
153        self.0.duration as i64
154    }
155
156    #[inline]
157    pub fn set_duration(&mut self, value: i64) {
158        self.0.duration = value;
159    }
160
161    #[inline]
162    pub fn position(&self) -> isize {
163        self.0.pos as isize
164    }
165
166    #[inline]
167    pub fn set_position(&mut self, value: isize) {
168        self.0.pos = value as i64
169    }
170
171    #[inline]
172    pub fn convergence(&self) -> isize {
173        self.0.convergence_duration as isize
174    }
175
176    #[inline]
177    pub fn side_data(&self) -> SideDataIter {
178        SideDataIter::new(&self.0)
179    }
180
181    #[inline]
182    pub fn data(&self) -> Option<&[u8]> {
183        unsafe {
184            if self.0.data.is_null() {
185                None
186            } else {
187                Some(slice::from_raw_parts(self.0.data, self.0.size as usize))
188            }
189        }
190    }
191
192    #[inline]
193    pub fn data_mut(&mut self) -> Option<&mut [u8]> {
194        unsafe {
195            if self.0.data.is_null() {
196                None
197            } else {
198                Some(slice::from_raw_parts_mut(self.0.data, self.0.size as usize))
199            }
200        }
201    }
202
203    #[inline]
204    pub fn read(&mut self, format: &mut format::context::Input) -> Result<(), Error> {
205        unsafe {
206            match av_read_frame(format.as_mut_ptr(), self.as_mut_ptr()) {
207                0 => Ok(()),
208                e => Err(Error::from(e)),
209            }
210        }
211    }
212
213    #[inline]
214    pub fn write(&self, format: &mut format::context::Output) -> Result<bool, Error> {
215        unsafe {
216            if self.is_empty() {
217                return Err(Error::InvalidData);
218            }
219
220            match av_write_frame(format.as_mut_ptr(), self.as_ptr() as *mut _) {
221                1 => Ok(true),
222                0 => Ok(false),
223                e => Err(Error::from(e)),
224            }
225        }
226    }
227
228    #[inline]
229    pub fn write_interleaved(&self, format: &mut format::context::Output) -> Result<(), Error> {
230        unsafe {
231            if self.is_empty() {
232                return Err(Error::InvalidData);
233            }
234
235            match av_interleaved_write_frame(format.as_mut_ptr(), self.as_ptr() as *mut _) {
236                0 => Ok(()),
237                e => Err(Error::from(e)),
238            }
239        }
240    }
241}
242
243impl Ref for Packet {
244    fn as_ptr(&self) -> *const AVPacket {
245        &self.0
246    }
247}
248
249impl Mut for Packet {
250    fn as_mut_ptr(&mut self) -> *mut AVPacket {
251        &mut self.0
252    }
253}
254
255impl Clone for Packet {
256    #[inline]
257    fn clone(&self) -> Self {
258        let mut pkt = Packet::empty();
259        pkt.clone_from(self);
260
261        pkt
262    }
263
264    #[inline]
265    fn clone_from(&mut self, source: &Self) {
266        unsafe {
267            av_copy_packet(&mut self.0, &source.0);
268        }
269    }
270}
271
272impl Drop for Packet {
273    fn drop(&mut self) {
274        unsafe {
275            av_packet_unref(&mut self.0);
276        }
277    }
278}
279
280pub struct SideDataIter<'a> {
281    ptr: *const AVPacket,
282    cur: c_int,
283
284    _marker: PhantomData<&'a Packet>,
285}
286
287impl<'a> SideDataIter<'a> {
288    pub fn new(ptr: *const AVPacket) -> Self {
289        SideDataIter {
290            ptr,
291            cur: 0,
292            _marker: PhantomData,
293        }
294    }
295}
296
297impl<'a> Iterator for SideDataIter<'a> {
298    type Item = SideData<'a>;
299
300    fn next(&mut self) -> Option<<Self as Iterator>::Item> {
301        unsafe {
302            if self.cur >= (*self.ptr).side_data_elems {
303                None
304            } else {
305                self.cur += 1;
306                Some(SideData::wrap(
307                    (*self.ptr).side_data.offset((self.cur - 1) as isize),
308                ))
309            }
310        }
311    }
312
313    fn size_hint(&self) -> (usize, Option<usize>) {
314        unsafe {
315            let length = (*self.ptr).side_data_elems as usize;
316
317            (length - self.cur as usize, Some(length - self.cur as usize))
318        }
319    }
320}
321
322impl<'a> ExactSizeIterator for SideDataIter<'a> {}
ffmpeg_next_crossfix/codec/packet/packet.rs

ffmpeg_next_crossfix/codec/packet/
packet.rs
