ffmpeg_the_third/codec/packet/
packet.rs

1use std::marker::PhantomData;
2use std::mem;
3use std::slice;
4
5use super::{Borrow, Flags, Mut, Ref, SideData};
6use crate::ffi::*;
7use crate::{format, Error, Rational};
8use libc::c_int;
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 side_data(&self) -> SideDataIter<'_> {
173        SideDataIter::new(&self.0)
174    }
175
176    #[inline]
177    pub fn data(&self) -> Option<&[u8]> {
178        unsafe {
179            if self.0.data.is_null() {
180                None
181            } else {
182                Some(slice::from_raw_parts(self.0.data, self.0.size as usize))
183            }
184        }
185    }
186
187    #[inline]
188    pub fn data_mut(&mut self) -> Option<&mut [u8]> {
189        unsafe {
190            if self.0.data.is_null() {
191                None
192            } else {
193                Some(slice::from_raw_parts_mut(self.0.data, self.0.size as usize))
194            }
195        }
196    }
197
198    #[inline]
199    pub fn read(&mut self, format: &mut format::context::Input) -> Result<(), Error> {
200        unsafe {
201            match av_read_frame(format.as_mut_ptr(), self.as_mut_ptr()) {
202                0 => Ok(()),
203                e => Err(Error::from(e)),
204            }
205        }
206    }
207
208    #[inline]
209    pub fn write(&self, format: &mut format::context::Output) -> Result<bool, Error> {
210        unsafe {
211            if self.is_empty() {
212                return Err(Error::InvalidData);
213            }
214
215            match av_write_frame(format.as_mut_ptr(), self.as_ptr() as *mut _) {
216                1 => Ok(true),
217                0 => Ok(false),
218                e => Err(Error::from(e)),
219            }
220        }
221    }
222
223    #[inline]
224    pub fn write_interleaved(&self, format: &mut format::context::Output) -> Result<(), Error> {
225        unsafe {
226            if self.is_empty() {
227                return Err(Error::InvalidData);
228            }
229
230            match av_interleaved_write_frame(format.as_mut_ptr(), self.as_ptr() as *mut _) {
231                0 => Ok(()),
232                e => Err(Error::from(e)),
233            }
234        }
235    }
236}
237
238impl Ref for Packet {
239    fn as_ptr(&self) -> *const AVPacket {
240        &self.0
241    }
242}
243
244impl Mut for Packet {
245    fn as_mut_ptr(&mut self) -> *mut AVPacket {
246        &mut self.0
247    }
248}
249
250impl Clone for Packet {
251    #[inline]
252    fn clone(&self) -> Self {
253        let mut pkt = Packet::empty();
254        pkt.clone_from(self);
255
256        pkt
257    }
258
259    #[inline]
260    fn clone_from(&mut self, source: &Self) {
261        unsafe {
262            av_packet_ref(&mut self.0, &source.0);
263            av_packet_make_writable(&mut self.0);
264        }
265    }
266}
267
268impl Drop for Packet {
269    fn drop(&mut self) {
270        unsafe {
271            av_packet_unref(&mut self.0);
272        }
273    }
274}
275
276pub struct SideDataIter<'a> {
277    ptr: *const AVPacket,
278    cur: c_int,
279
280    _marker: PhantomData<&'a Packet>,
281}
282
283impl<'a> SideDataIter<'a> {
284    pub fn new(ptr: *const AVPacket) -> Self {
285        SideDataIter {
286            ptr,
287            cur: 0,
288            _marker: PhantomData,
289        }
290    }
291}
292
293impl<'a> Iterator for SideDataIter<'a> {
294    type Item = SideData<'a>;
295
296    fn next(&mut self) -> Option<<Self as Iterator>::Item> {
297        unsafe {
298            if self.cur >= (*self.ptr).side_data_elems {
299                None
300            } else {
301                self.cur += 1;
302                Some(SideData::wrap(
303                    (*self.ptr).side_data.offset((self.cur - 1) as isize),
304                ))
305            }
306        }
307    }
308
309    fn size_hint(&self) -> (usize, Option<usize>) {
310        unsafe {
311            let length = (*self.ptr).side_data_elems as usize;
312
313            (length - self.cur as usize, Some(length - self.cur as usize))
314        }
315    }
316}
317
318impl<'a> ExactSizeIterator for SideDataIter<'a> {}
ffmpeg_the_third/codec/packet/packet.rs

ffmpeg_the_third/codec/packet/
packet.rs
