ffmpeg_next/codec/decoder/
audio.rs

1use std::ops::{Deref, DerefMut};
2
3#[cfg(not(feature = "ffmpeg_5_0"))]
4use ffi::*;
5#[cfg(not(feature = "ffmpeg_5_0"))]
6use libc::c_int;
7
8use super::Opened;
9use codec::Context;
10#[cfg(not(feature = "ffmpeg_5_0"))]
11use frame;
12use util::format;
13#[cfg(not(feature = "ffmpeg_5_0"))]
14use {packet, Error};
15use {AudioService, ChannelLayout};
16
17pub struct Audio(pub Opened);
18
19impl Audio {
20    #[deprecated(
21        since = "4.4.0",
22        note = "Underlying API avcodec_decode_audio4 has been deprecated since FFmpeg 3.1; \
23        consider switching to send_packet() and receive_frame()"
24    )]
25    #[cfg(not(feature = "ffmpeg_5_0"))]
26    pub fn decode<P: packet::Ref>(
27        &mut self,
28        packet: &P,
29        out: &mut frame::Audio,
30    ) -> Result<bool, Error> {
31        unsafe {
32            let mut got: c_int = 0;
33
34            match avcodec_decode_audio4(
35                self.as_mut_ptr(),
36                out.as_mut_ptr(),
37                &mut got,
38                packet.as_ptr(),
39            ) {
40                e if e < 0 => Err(Error::from(e)),
41                _ => Ok(got != 0),
42            }
43        }
44    }
45
46    pub fn rate(&self) -> u32 {
47        unsafe { (*self.as_ptr()).sample_rate as u32 }
48    }
49
50    pub fn channels(&self) -> u16 {
51        #[cfg(not(feature = "ffmpeg_7_0"))]
52        unsafe {
53            (*self.as_ptr()).channels as u16
54        }
55
56        #[cfg(feature = "ffmpeg_7_0")]
57        {
58            self.channel_layout().channels() as u16
59        }
60    }
61
62    pub fn format(&self) -> format::Sample {
63        unsafe { format::Sample::from((*self.as_ptr()).sample_fmt) }
64    }
65
66    pub fn request_format(&mut self, value: format::Sample) {
67        unsafe {
68            (*self.as_mut_ptr()).request_sample_fmt = value.into();
69        }
70    }
71
72    pub fn frames(&self) -> usize {
73        #[cfg(not(feature = "ffmpeg_7_0"))]
74        unsafe {
75            (*self.as_ptr()).frame_number as usize
76        }
77
78        #[cfg(feature = "ffmpeg_7_0")]
79        unsafe {
80            (*self.as_ptr()).frame_num as usize
81        }
82    }
83
84    pub fn align(&self) -> usize {
85        unsafe { (*self.as_ptr()).block_align as usize }
86    }
87
88    pub fn channel_layout(&self) -> ChannelLayout {
89        #[cfg(not(feature = "ffmpeg_7_0"))]
90        unsafe {
91            ChannelLayout::from_bits_truncate((*self.as_ptr()).channel_layout)
92        }
93
94        #[cfg(feature = "ffmpeg_7_0")]
95        unsafe {
96            ChannelLayout::from((*self.as_ptr()).ch_layout)
97        }
98    }
99
100    pub fn set_channel_layout(&mut self, value: ChannelLayout) {
101        unsafe {
102            #[cfg(not(feature = "ffmpeg_7_0"))]
103            {
104                (*self.as_mut_ptr()).channel_layout = value.bits();
105            }
106
107            #[cfg(feature = "ffmpeg_7_0")]
108            {
109                (*self.as_mut_ptr()).ch_layout = value.into();
110            }
111        }
112    }
113
114    #[cfg(not(feature = "ffmpeg_7_0"))]
115    pub fn request_channel_layout(&mut self, value: ChannelLayout) {
116        unsafe {
117            (*self.as_mut_ptr()).request_channel_layout = value.bits();
118        }
119    }
120
121    pub fn audio_service(&mut self) -> AudioService {
122        unsafe { AudioService::from((*self.as_mut_ptr()).audio_service_type) }
123    }
124
125    pub fn max_bit_rate(&self) -> usize {
126        unsafe { (*self.as_ptr()).rc_max_rate as usize }
127    }
128
129    pub fn frame_size(&self) -> u32 {
130        unsafe { (*self.as_ptr()).frame_size as u32 }
131    }
132
133    #[cfg(not(feature = "ffmpeg_5_0"))]
134    pub fn frame_start(&self) -> Option<usize> {
135        unsafe {
136            // Removed in ffmpeg >= 5.0 in favor of using encoder
137            // private options.
138            match (*self.as_ptr()).timecode_frame_start {
139                -1 => None,
140                n => Some(n as usize),
141            }
142        }
143    }
144}
145
146impl Deref for Audio {
147    type Target = Opened;
148
149    fn deref(&self) -> &<Self as Deref>::Target {
150        &self.0
151    }
152}
153
154impl DerefMut for Audio {
155    fn deref_mut(&mut self) -> &mut <Self as Deref>::Target {
156        &mut self.0
157    }
158}
159
160impl AsRef<Context> for Audio {
161    fn as_ref(&self) -> &Context {
162        self
163    }
164}
165
166impl AsMut<Context> for Audio {
167    fn as_mut(&mut self) -> &mut Context {
168        &mut self.0
169    }
170}
ffmpeg_next/codec/decoder/audio.rs

ffmpeg_next/codec/decoder/
audio.rs
