1 use std::thread::JoinHandle;
2 use std::sync::mpsc::{Receiver, SyncSender, TrySendError};
5 use sdl2::render::Texture;
7 use nihav_core::frame::{NABufferType, NAVideoBuffer};
8 use nihav_core::formats::*;
9 use nihav_core::codecs::*;
10 use nihav_core::scale::*;
12 use super::{DecoderStuff, DecoderType, DecoderState, DecodingState, DispQueue, FrameRecord, PktSendEvent, FRAME_QUEUE_LEN};
14 static VDEC_STATE: DecoderState = DecoderState::new();
16 pub const FRAME_QUEUE_SIZE: usize = 25;
18 pub const SDL_RGB_FMT: NAPixelFormaton = NAPixelFormaton { model: ColorModel::RGB(RGBSubmodel::RGB), components: 3,
20 Some(NAPixelChromaton { h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 0, next_elem: 3 }),
21 Some(NAPixelChromaton { h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 1, next_elem: 3 }),
22 Some(NAPixelChromaton { h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 2, next_elem: 3 }),
24 ], elem_size: 3, be: false, alpha: false, palette: false };
26 pub struct VideoDecoder {
27 yuv_pool: NAVideoBufferPool<u8>,
28 rgb_pool: NAVideoBufferPool<u8>,
36 oinfo_yuv: NAVideoInfo,
37 oinfo_rgb: NAVideoInfo,
41 pub fn new(width: usize, height: usize, tb_num: u32, tb_den: u32, dec: DecoderStuff) -> Self {
42 let ofmt_rgb = ScaleInfo { width, height, fmt: SDL_RGB_FMT };
43 let ofmt_yuv = ScaleInfo { width, height, fmt: YUV420_FORMAT };
44 let oinfo_rgb = NAVideoInfo { width, height, flipped: false, format: SDL_RGB_FMT, bits: 24 };
45 let oinfo_yuv = NAVideoInfo { width, height, flipped: false, format: YUV420_FORMAT, bits: 12 };
47 yuv_pool: NAVideoBufferPool::new(FRAME_QUEUE_SIZE),
48 rgb_pool: NAVideoBufferPool::new(FRAME_QUEUE_SIZE),
50 dec, ofmt_yuv, ofmt_rgb, oinfo_yuv, oinfo_rgb,
51 scaler: NAScale::new(ofmt_rgb, ofmt_rgb).unwrap(),
52 ifmt: NAVideoInfo { width: 0, height: 0, flipped: false, format: SDL_RGB_FMT, bits: 24 },
55 fn convert_buf(&mut self, bt: NABufferType, ts: u64) -> Option<FrameRecord> {
56 let vinfo = bt.get_video_info().unwrap();
57 if self.ifmt.get_width() != vinfo.get_width() ||
58 self.ifmt.get_height() != vinfo.get_height() ||
59 self.ifmt.get_format() != vinfo.get_format() {
61 let sc_ifmt = ScaleInfo { width: self.ifmt.get_width(), height: self.ifmt.get_height(), fmt: self.ifmt.get_format() };
62 let do_yuv = if let ColorModel::YUV(_) = self.ifmt.get_format().get_model() { true } else { false };
63 let ofmt = if do_yuv { self.ofmt_yuv } else { self.ofmt_rgb };
64 self.scaler = NAScale::new(sc_ifmt, ofmt).unwrap();
66 let mut opic = if let ColorModel::YUV(_) = self.ifmt.get_format().get_model() {
67 self.yuv_pool.prealloc_video(self.oinfo_yuv, 2).unwrap();
68 while self.yuv_pool.get_free().is_none() {
69 if VDEC_STATE.is_flushing() {
72 std::thread::yield_now();
74 NABufferType::Video(self.yuv_pool.get_free().unwrap())
76 self.rgb_pool.prealloc_video(self.oinfo_rgb, 0).unwrap();
77 while self.rgb_pool.get_free().is_none() {
78 if VDEC_STATE.is_flushing() {
81 std::thread::yield_now();
83 NABufferType::VideoPacked(self.rgb_pool.get_free().unwrap())
85 let ret = self.scaler.convert(&bt, &mut opic);
86 if ret.is_err() { println!(" scaler error {:?}", ret.err()); return None; }
88 let time = NATimeInfo::ts_to_time(ts, 1000, self.tb_num, self.tb_den);
91 pub fn next_frame(&mut self, pkt: &NAPacket) -> Option<FrameRecord> {
93 DecoderType::Video(ref mut vdec, ref mut reord) => {
94 if let Ok(frm) = vdec.decode(&mut self.dec.dsupp, pkt) {
96 while let Some(frm) = reord.get_frame() {
97 let bt = frm.get_buffer();
98 if let NABufferType::None = bt { continue; }
99 let ts = frm.get_dts().unwrap_or_else(|| frm.get_pts().unwrap_or(0));
100 return self.convert_buf(bt, ts);
104 DecoderType::VideoMT(ref mut vdec, ref mut reord) => {
105 let queue_id = reord.register_frame();
106 match vdec.queue_pkt(&mut self.dec.dsupp, &pkt, queue_id) {
109 while !vdec.can_take_input() || vdec.has_output() {
110 match vdec.get_frame() {
112 reord.add_frame(frm, id);
115 reord.drop_frame(id);
116 panic!("frame {} decoding error {:?}", id, err);
120 match vdec.queue_pkt(&mut self.dec.dsupp, &pkt, queue_id) {
122 Ok(false) => panic!("still can't queue frame!"),
123 Err(err) => panic!("queueing error {:?}", err),
126 Err(err) => panic!("queueing error {:?}", err),
128 while let Some(frm) = reord.get_frame() {
129 let bt = frm.get_buffer();
130 if let NABufferType::None = bt { continue; }
131 let ts = frm.get_dts().unwrap_or_else(|| frm.get_pts().unwrap_or(0));
132 return self.convert_buf(bt, ts);
135 _ => panic!("not a video decoder!"),
139 pub fn more_frames(&mut self, do_not_wait: bool) -> Option<FrameRecord> {
141 DecoderType::Video(ref mut _dec, ref mut reord) => {
142 while let Some(frm) = reord.get_frame() {
143 let bt = frm.get_buffer();
144 if let NABufferType::None = bt { continue; }
145 let ts = frm.get_dts().unwrap_or_else(|| frm.get_pts().unwrap_or(0));
146 return self.convert_buf(bt, ts);
149 DecoderType::VideoMT(ref mut vdec, ref mut reord) => {
150 let mut got_some = false;
151 while vdec.has_output() {
152 match vdec.get_frame() {
154 reord.add_frame(frm, id);
158 reord.drop_frame(id);
159 panic!("frame {} decoding error {:?}", id, err);
163 if !got_some && !do_not_wait {
164 match vdec.get_frame() {
166 reord.add_frame(frm, id);
168 (Err(DecoderError::NoFrame), _) => {},
170 reord.drop_frame(id);
171 panic!("frame {} decoding error {:?}", id, err);
175 while let Some(frm) = reord.get_frame() {
176 let bt = frm.get_buffer();
177 if let NABufferType::None = bt { continue; }
178 let ts = frm.get_dts().unwrap_or_else(|| frm.get_pts().unwrap_or(0));
179 return self.convert_buf(bt, ts);
186 pub fn last_frame(&mut self) -> Option<FrameRecord> {
188 DecoderType::Video(ref mut _dec, ref mut reord) => {
189 while let Some(frm) = reord.get_last_frames() {
190 let bt = frm.get_buffer();
191 if let NABufferType::None = bt { continue; }
192 let ts = frm.get_dts().unwrap_or_else(|| frm.get_pts().unwrap_or(0));
193 return self.convert_buf(bt, ts);
196 DecoderType::VideoMT(ref mut _dec, ref mut reord) => {
197 while let Some(frm) = reord.get_last_frames() {
198 let bt = frm.get_buffer();
199 if let NABufferType::None = bt { continue; }
200 let ts = frm.get_dts().unwrap_or_else(|| frm.get_pts().unwrap_or(0));
201 return self.convert_buf(bt, ts);
208 pub fn flush(&mut self) {
210 DecoderType::Video(ref mut dec, ref mut reord) => {
214 DecoderType::VideoMT(ref mut dec, ref mut reord) => {
223 fn start_video_decoding(width: usize, height: usize, tb_num: u32, tb_den: u32, video_dec: DecoderStuff, vprecv: Receiver<PktSendEvent>, vfsend: SyncSender<(NABufferType, u64)>) -> JoinHandle<()> {
224 std::thread::Builder::new().name("vdecoder".to_string()).spawn(move ||{
225 VDEC_STATE.set_state(DecodingState::Waiting);
226 let mut vdec = VideoDecoder::new(width, height, tb_num, tb_den, video_dec);
227 let mut skip_mode = FrameSkipMode::None;
229 match vprecv.recv() {
230 Ok(PktSendEvent::Packet(pkt)) => {
231 if !VDEC_STATE.is_flushing() {
232 if let Some((buf, time)) = vdec.next_frame(&pkt) {
233 vfsend.send((buf, time)).unwrap();
235 while let Some((buf, time)) = vdec.more_frames(true) {
236 vfsend.send((buf, time)).unwrap();
240 Ok(PktSendEvent::GetFrames) => {
241 while let Some((buf, time)) = vdec.more_frames(false) {
242 vfsend.send((buf, time)).unwrap();
244 VDEC_STATE.set_state(DecodingState::Waiting);
246 Ok(PktSendEvent::Flush) => {
248 VDEC_STATE.set_state(DecodingState::Waiting);
250 Ok(PktSendEvent::End) => {
251 while vdec.yuv_pool.get_free().is_some() && vdec.rgb_pool.get_free().is_some() {
252 let ret = vdec.last_frame();
256 vfsend.send(ret.unwrap()).unwrap();
258 VDEC_STATE.set_state(DecodingState::End);
261 Ok(PktSendEvent::ImmediateEnd) => {
262 VDEC_STATE.set_state(DecodingState::End);
265 Ok(PktSendEvent::HurryUp) => {
266 skip_mode = skip_mode.advance();
267 if let DecoderType::Video(ref mut dec, ref mut _reord) = vdec.dec.dec {
268 dec.set_options(&[NAOption{
269 name: FRAME_SKIP_OPTION,
270 value: NAValue::String(skip_mode.to_string()),
283 fn advance(&self) -> Self;
286 impl Advance for FrameSkipMode {
287 fn advance(&self) -> Self {
289 FrameSkipMode::None => FrameSkipMode::KeyframesOnly,
290 FrameSkipMode::KeyframesOnly => FrameSkipMode::IntraOnly,
291 FrameSkipMode::IntraOnly => FrameSkipMode::None,
296 fn output_yuv(yuv_texture: &mut Texture, buf: &NAVideoBuffer<u8>, width: usize, height: usize) {
297 let src = buf.get_data();
298 let ysstride = buf.get_stride(0);
299 let ysrc = &src[buf.get_offset(0)..];
300 let usstride = buf.get_stride(2);
301 let usrc = &src[buf.get_offset(2)..];
302 let vsstride = buf.get_stride(1);
303 let vsrc = &src[buf.get_offset(1)..];
304 yuv_texture.with_lock(None, |buffer: &mut [u8], pitch: usize| {
305 let csize = pitch.min(width);
306 for (dline, sline) in buffer.chunks_exact_mut(pitch).take(height).zip(ysrc.chunks_exact(ysstride)) {
307 dline[..csize].copy_from_slice(&sline[..csize]);
309 let coff = pitch * height;
310 let csize = (pitch / 2).min(width / 2);
311 for (dline, sline) in buffer[coff..].chunks_exact_mut(pitch / 2).take(height/2).zip(vsrc.chunks(vsstride)) {
312 dline[..csize].copy_from_slice(&sline[..csize]);
314 let coff = pitch * height + (pitch / 2) * (height / 2);
315 for (dline, sline) in buffer[coff..].chunks_exact_mut(pitch / 2).take(height/2).zip(usrc.chunks(usstride)) {
316 dline[..csize].copy_from_slice(&sline[..csize]);
322 pub struct VideoControl {
323 vqueue: Vec<PktSendEvent>,
324 vpsend: SyncSender<PktSendEvent>,
325 vfrecv: Receiver<FrameRecord>,
327 vthread: JoinHandle<()>,
331 pub fn new(video_dec: Option<DecoderStuff>, width: usize, height: usize, tb_num: u32, tb_den: u32) -> Self {
332 let (vpsend, vprecv) = std::sync::mpsc::sync_channel::<PktSendEvent>(0);
333 let (vfsend, vfrecv) = std::sync::mpsc::sync_channel::<FrameRecord>(FRAME_QUEUE_SIZE - 1);
335 VDEC_STATE.set_state(DecodingState::Normal);
337 let vthread = if let Some(video_dec) = video_dec {
338 start_video_decoding(width, height, tb_num, tb_den, video_dec, vprecv, vfsend)
340 thread::Builder::new().name("vdecoder-dummy".to_string()).spawn(move ||{
342 match vprecv.recv() {
343 Ok(PktSendEvent::End) => break,
344 Ok(PktSendEvent::ImmediateEnd) => break,
351 VDEC_STATE.set_state(DecodingState::End);
357 vqueue: Vec::with_capacity(FRAME_QUEUE_LEN),
363 pub fn flush(&mut self) {
365 VDEC_STATE.set_state(DecodingState::Flush);
367 let _ = self.vfrecv.try_recv();
369 let _ = self.vpsend.send(PktSendEvent::Flush);
370 while self.vfrecv.try_recv().is_ok() { }
372 pub fn get_queue_size(&self) -> usize { self.vqueue.len() }
373 pub fn is_filled(&self, size: usize) -> bool {
374 self.vqueue.len() >= size
376 pub fn try_send_video(&mut self, evt: PktSendEvent) -> bool {
377 if self.vqueue.len() > 0 {
378 self.vqueue.push(evt);
381 self.try_send_event(evt)
384 fn try_send_event(&mut self, evt: PktSendEvent) -> bool {
385 if let Err(TrySendError::Full(evt)) = self.vpsend.try_send(evt) {
386 self.vqueue.insert(0, evt);
392 pub fn try_send_queued(&mut self) -> bool {
393 while !self.vqueue.is_empty() {
394 let pkt = self.vqueue.remove(0);
395 if !self.try_send_event(pkt) {
401 pub fn is_video_end(&self) -> bool {
402 matches!(VDEC_STATE.get_state(), DecodingState::End | DecodingState::Error)
404 pub fn wait_for_frames(&mut self) -> Result<(), ()> {
405 VDEC_STATE.set_state(DecodingState::Prefetch);
406 self.try_send_event(PktSendEvent::GetFrames);
407 while !self.try_send_queued() {
410 match VDEC_STATE.get_state() {
411 DecodingState::Waiting => {
412 VDEC_STATE.set_state(DecodingState::Normal);
415 DecodingState::Prefetch => thread::yield_now(),
421 pub fn is_yuv(&self) -> bool { self.do_yuv }
423 pub fn fill(&mut self, disp_queue: &mut DispQueue) {
424 while !disp_queue.is_full() {
425 let is_empty = disp_queue.is_empty();
426 if let Ok((pic, time)) = self.vfrecv.try_recv() {
427 let buf = pic.get_vbuf().unwrap();
428 self.do_yuv = buf.get_info().get_format().get_model().is_yuv();
429 let idx = disp_queue.end;
430 disp_queue.move_end();
431 let frm = &mut disp_queue.pool[idx];
433 let sstride = buf.get_stride(0);
434 let src = buf.get_data();
435 frm.rgb_tex.with_lock(None, |buffer: &mut [u8], pitch: usize| {
436 let csize = sstride.min(pitch);
437 for (dst, src) in buffer.chunks_mut(pitch).zip(src.chunks(sstride)) {
438 (&mut dst[..csize]).copy_from_slice(&src[..csize]);
443 output_yuv(&mut frm.yuv_tex, &buf, disp_queue.width, disp_queue.height);
446 frm.is_yuv = self.do_yuv;
449 disp_queue.first_ts = time;
451 disp_queue.last_ts = time;
458 pub fn finish(self) {
459 VDEC_STATE.set_state(DecodingState::Flush);
461 let _ = self.vfrecv.try_recv();
463 let _ = self.vpsend.send(PktSendEvent::ImmediateEnd);
464 self.vthread.join().unwrap();