| 1 | //! Image conversion functionality. |
| 2 | |
| 3 | //! # Examples |
| 4 | //! |
| 5 | //! Convert input image into YUV one and scale down two times. |
| 6 | //! ```no_run |
| 7 | //! use nihav_core::scale::*; |
| 8 | //! use nihav_core::formats::{RGB24_FORMAT, YUV420_FORMAT}; |
| 9 | //! use nihav_core::frame::{alloc_video_buffer, NAVideoInfo}; |
| 10 | //! |
| 11 | //! let mut in_pic = alloc_video_buffer(NAVideoInfo::new(640, 480, false, RGB24_FORMAT), 4).unwrap(); |
| 12 | //! let mut out_pic = alloc_video_buffer(NAVideoInfo::new(320, 240, false, YUV420_FORMAT), 4).unwrap(); |
| 13 | //! let in_fmt = get_scale_fmt_from_pic(&in_pic); |
| 14 | //! let out_fmt = get_scale_fmt_from_pic(&out_pic); |
| 15 | //! let mut scaler = NAScale::new(in_fmt, out_fmt).unwrap(); |
| 16 | //! scaler.convert(&in_pic, &mut out_pic).unwrap(); |
| 17 | //! ``` |
| 18 | use crate::frame::*; |
| 19 | |
| 20 | mod kernel; |
| 21 | |
| 22 | mod colorcvt; |
| 23 | mod repack; |
| 24 | mod scale; |
| 25 | |
| 26 | mod palette; |
| 27 | |
| 28 | pub use crate::scale::palette::{palettise_frame, QuantisationMode, PaletteSearchMode}; |
| 29 | |
| 30 | /// Image format information used by the converter. |
| 31 | #[derive(Clone,Copy,PartialEq)] |
| 32 | pub struct ScaleInfo { |
| 33 | /// Pixel format description. |
| 34 | pub fmt: NAPixelFormaton, |
| 35 | /// Image width. |
| 36 | pub width: usize, |
| 37 | /// Image height. |
| 38 | pub height: usize, |
| 39 | } |
| 40 | |
| 41 | impl std::fmt::Display for ScaleInfo { |
| 42 | fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { |
| 43 | write!(f, "({}x{}, {})", self.width, self.height, self.fmt) |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | /// A list specifying general image conversion errors. |
| 48 | #[derive(Debug,Clone,Copy,PartialEq)] |
| 49 | #[allow(dead_code)] |
| 50 | pub enum ScaleError { |
| 51 | /// Input or output buffer contains no image data. |
| 52 | NoFrame, |
| 53 | /// Allocation failed. |
| 54 | AllocError, |
| 55 | /// Invalid argument. |
| 56 | InvalidArgument, |
| 57 | /// Feature is not implemented. |
| 58 | NotImplemented, |
| 59 | /// Internal implementation bug. |
| 60 | Bug, |
| 61 | } |
| 62 | |
| 63 | /// A specialised `Result` type for image conversion operations. |
| 64 | pub type ScaleResult<T> = Result<T, ScaleError>; |
| 65 | |
| 66 | /*trait Kernel { |
| 67 | fn init(&mut self, in_fmt: &ScaleInfo, dest_fmt: &ScaleInfo) -> ScaleResult<NABufferType>; |
| 68 | fn process(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType); |
| 69 | }*/ |
| 70 | |
| 71 | struct KernelDesc { |
| 72 | name: &'static str, |
| 73 | create: fn () -> Box<dyn kernel::Kernel>, |
| 74 | } |
| 75 | |
| 76 | impl KernelDesc { |
| 77 | fn find(name: &str) -> ScaleResult<Box<dyn kernel::Kernel>> { |
| 78 | for kern in KERNELS.iter() { |
| 79 | if kern.name == name { |
| 80 | return Ok((kern.create)()); |
| 81 | } |
| 82 | } |
| 83 | Err(ScaleError::InvalidArgument) |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | const KERNELS: &[KernelDesc] = &[ |
| 88 | KernelDesc { name: "pack", create: repack::create_pack }, |
| 89 | KernelDesc { name: "unpack", create: repack::create_unpack }, |
| 90 | KernelDesc { name: "depal", create: repack::create_depal }, |
| 91 | KernelDesc { name: "palette", create: palette::create_palettise }, |
| 92 | KernelDesc { name: "scale", create: scale::create_scale }, |
| 93 | KernelDesc { name: "rgb_to_yuv", create: colorcvt::create_rgb2yuv }, |
| 94 | KernelDesc { name: "yuv_to_rgb", create: colorcvt::create_yuv2rgb }, |
| 95 | ]; |
| 96 | |
| 97 | struct Stage { |
| 98 | fmt_out: ScaleInfo, |
| 99 | tmp_pic: NABufferType, |
| 100 | next: Option<Box<Stage>>, |
| 101 | worker: Box<dyn kernel::Kernel>, |
| 102 | } |
| 103 | |
| 104 | /// Converts input picture information into format used by scaler. |
| 105 | pub fn get_scale_fmt_from_pic(pic: &NABufferType) -> ScaleInfo { |
| 106 | let info = pic.get_video_info().unwrap(); |
| 107 | ScaleInfo { fmt: info.get_format(), width: info.get_width(), height: info.get_height() } |
| 108 | } |
| 109 | |
| 110 | impl Stage { |
| 111 | fn new(name: &str, in_fmt: &ScaleInfo, dest_fmt: &ScaleInfo) -> ScaleResult<Self> { |
| 112 | let mut worker = KernelDesc::find(name)?; |
| 113 | let tmp_pic = worker.init(in_fmt, dest_fmt)?; |
| 114 | let fmt_out = get_scale_fmt_from_pic(&tmp_pic); |
| 115 | Ok(Self { fmt_out, tmp_pic, next: None, worker }) |
| 116 | } |
| 117 | fn add(&mut self, new: Stage) { |
| 118 | if let Some(ref mut next) = self.next { |
| 119 | next.add(new); |
| 120 | } else { |
| 121 | self.next = Some(Box::new(new)); |
| 122 | } |
| 123 | } |
| 124 | fn process(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType) -> ScaleResult<()> { |
| 125 | if let Some(ref mut nextstage) = self.next { |
| 126 | self.worker.process(pic_in, &mut self.tmp_pic); |
| 127 | nextstage.process(&self.tmp_pic, pic_out)?; |
| 128 | } else { |
| 129 | self.worker.process(pic_in, pic_out); |
| 130 | } |
| 131 | Ok(()) |
| 132 | } |
| 133 | fn drop_last_tmp(&mut self) { |
| 134 | if let Some(ref mut nextstage) = self.next { |
| 135 | nextstage.drop_last_tmp(); |
| 136 | } else { |
| 137 | self.tmp_pic = NABufferType::None; |
| 138 | } |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | /// Image format converter. |
| 143 | pub struct NAScale { |
| 144 | fmt_in: ScaleInfo, |
| 145 | fmt_out: ScaleInfo, |
| 146 | just_convert: bool, |
| 147 | pipeline: Option<Stage>, |
| 148 | } |
| 149 | |
| 150 | fn check_format(in_fmt: NAVideoInfo, ref_fmt: &ScaleInfo, just_convert: bool) -> ScaleResult<()> { |
| 151 | if in_fmt.get_format() != ref_fmt.fmt { return Err(ScaleError::InvalidArgument); } |
| 152 | if !just_convert && (in_fmt.get_width() != ref_fmt.width || in_fmt.get_height() != ref_fmt.height) { |
| 153 | return Err(ScaleError::InvalidArgument); |
| 154 | } |
| 155 | Ok(()) |
| 156 | } |
| 157 | |
| 158 | fn copy(pic_in: &NABufferType, pic_out: &mut NABufferType) |
| 159 | { |
| 160 | if let (Some(ref sbuf), Some(ref mut dbuf)) = (pic_in.get_vbuf(), pic_out.get_vbuf()) { |
| 161 | let mut same = true; |
| 162 | let num_components = sbuf.get_info().get_format().get_num_comp(); |
| 163 | for i in 0..num_components { |
| 164 | if sbuf.get_stride(i) != dbuf.get_stride(i) { |
| 165 | same = false; |
| 166 | break; |
| 167 | } |
| 168 | if sbuf.get_offset(i) != dbuf.get_offset(i) { |
| 169 | same = false; |
| 170 | break; |
| 171 | } |
| 172 | } |
| 173 | if same { |
| 174 | let sdata = sbuf.get_data(); |
| 175 | let ddata = dbuf.get_data_mut().unwrap(); |
| 176 | ddata.copy_from_slice(&sdata[0..]); |
| 177 | } else { |
| 178 | let sdata = sbuf.get_data(); |
| 179 | for comp in 0..num_components { |
| 180 | let (_, h) = sbuf.get_dimensions(comp); |
| 181 | let src = &sdata[sbuf.get_offset(comp)..]; |
| 182 | let sstride = sbuf.get_stride(comp); |
| 183 | let doff = dbuf.get_offset(comp); |
| 184 | let dstride = dbuf.get_stride(comp); |
| 185 | let ddata = dbuf.get_data_mut().unwrap(); |
| 186 | let dst = &mut ddata[doff..]; |
| 187 | let copy_size = sstride.min(dstride); |
| 188 | for (dline, sline) in dst.chunks_exact_mut(dstride).take(h).zip(src.chunks_exact(sstride)) { |
| 189 | (&mut dline[..copy_size]).copy_from_slice(&sline[..copy_size]); |
| 190 | } |
| 191 | } |
| 192 | } |
| 193 | } else { |
| 194 | unimplemented!(); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | macro_rules! add_stage { |
| 199 | ($head:expr, $new:expr) => { |
| 200 | if let Some(ref mut h) = $head { |
| 201 | h.add($new); |
| 202 | } else { |
| 203 | $head = Some($new); |
| 204 | } |
| 205 | }; |
| 206 | } |
| 207 | fn is_better_fmt(a: &ScaleInfo, b: &ScaleInfo) -> bool { |
| 208 | if (a.width >= b.width) && (a.height >= b.height) { |
| 209 | return true; |
| 210 | } |
| 211 | if a.fmt.get_max_depth() > b.fmt.get_max_depth() { |
| 212 | return true; |
| 213 | } |
| 214 | if a.fmt.get_max_subsampling() < b.fmt.get_max_subsampling() { |
| 215 | return true; |
| 216 | } |
| 217 | false |
| 218 | } |
| 219 | fn build_pipeline(ifmt: &ScaleInfo, ofmt: &ScaleInfo, just_convert: bool) -> ScaleResult<Option<Stage>> { |
| 220 | let inname = ifmt.fmt.get_model().get_short_name(); |
| 221 | let outname = ofmt.fmt.get_model().get_short_name(); |
| 222 | |
| 223 | println!("convert {} -> {}", ifmt, ofmt); |
| 224 | let needs_scale = if (ofmt.fmt.get_max_subsampling() > 0) && |
| 225 | (ofmt.fmt.get_max_subsampling() != ifmt.fmt.get_max_subsampling()) { |
| 226 | true |
| 227 | } else { |
| 228 | !just_convert |
| 229 | }; |
| 230 | let needs_unpack = !ifmt.fmt.is_unpacked(); |
| 231 | let needs_pack = !ofmt.fmt.is_unpacked(); |
| 232 | let needs_convert = inname != outname; |
| 233 | let scale_before_cvt = is_better_fmt(&ifmt, &ofmt) && needs_convert |
| 234 | && (ofmt.fmt.get_max_subsampling() == 0); |
| 235 | let needs_palettise = ofmt.fmt.palette; |
| 236 | //todo stages for model and gamma conversion |
| 237 | |
| 238 | let mut stages: Option<Stage> = None; |
| 239 | let mut cur_fmt = *ifmt; |
| 240 | |
| 241 | if needs_unpack { |
| 242 | println!("[adding unpack]"); |
| 243 | let new_stage = if !cur_fmt.fmt.is_paletted() { |
| 244 | Stage::new("unpack", &cur_fmt, &ofmt)? |
| 245 | } else { |
| 246 | Stage::new("depal", &cur_fmt, &ofmt)? |
| 247 | }; |
| 248 | cur_fmt = new_stage.fmt_out; |
| 249 | add_stage!(stages, new_stage); |
| 250 | } |
| 251 | if needs_scale && scale_before_cvt { |
| 252 | println!("[adding scale]"); |
| 253 | let new_stage = Stage::new("scale", &cur_fmt, &ofmt)?; |
| 254 | cur_fmt = new_stage.fmt_out; |
| 255 | add_stage!(stages, new_stage); |
| 256 | } |
| 257 | if needs_convert { |
| 258 | println!("[adding convert]"); |
| 259 | let cvtname = format!("{}_to_{}", inname, outname); |
| 260 | println!("[{}]", cvtname); |
| 261 | let new_stage = Stage::new(&cvtname, &cur_fmt, &ofmt)?; |
| 262 | //todo if fails try converting via RGB or YUV |
| 263 | cur_fmt = new_stage.fmt_out; |
| 264 | add_stage!(stages, new_stage); |
| 265 | //todo alpha plane copy/add |
| 266 | } |
| 267 | if needs_scale && !scale_before_cvt { |
| 268 | println!("[adding scale]"); |
| 269 | let new_stage = Stage::new("scale", &cur_fmt, &ofmt)?; |
| 270 | cur_fmt = new_stage.fmt_out; |
| 271 | add_stage!(stages, new_stage); |
| 272 | } |
| 273 | if needs_pack && !needs_palettise { |
| 274 | println!("[adding pack]"); |
| 275 | let new_stage = Stage::new("pack", &cur_fmt, &ofmt)?; |
| 276 | //cur_fmt = new_stage.fmt_out; |
| 277 | add_stage!(stages, new_stage); |
| 278 | } |
| 279 | if needs_palettise { |
| 280 | println!("[adding palettise]"); |
| 281 | let new_stage = Stage::new("palette", &cur_fmt, &ofmt)?; |
| 282 | //cur_fmt = new_stage.fmt_out; |
| 283 | add_stage!(stages, new_stage); |
| 284 | } |
| 285 | |
| 286 | if let Some(ref mut head) = stages { |
| 287 | head.drop_last_tmp(); |
| 288 | } |
| 289 | |
| 290 | Ok(stages) |
| 291 | } |
| 292 | |
| 293 | fn swap_plane<T:Copy>(data: &mut [T], stride: usize, h: usize, line0: &mut [T], line1: &mut [T]) { |
| 294 | let mut doff0 = 0; |
| 295 | let mut doff1 = stride * (h - 1); |
| 296 | for _ in 0..h/2 { |
| 297 | line0.copy_from_slice(&data[doff0..][..stride]); |
| 298 | line1.copy_from_slice(&data[doff1..][..stride]); |
| 299 | (&mut data[doff1..][..stride]).copy_from_slice(line0); |
| 300 | (&mut data[doff0..][..stride]).copy_from_slice(line1); |
| 301 | doff0 += stride; |
| 302 | doff1 -= stride; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /// Flips the picture contents. |
| 307 | pub fn flip_picture(pic: &mut NABufferType) -> ScaleResult<()> { |
| 308 | match pic { |
| 309 | NABufferType::Video(ref mut vb) => { |
| 310 | let ncomp = vb.get_num_components(); |
| 311 | for comp in 0..ncomp { |
| 312 | let off = vb.get_offset(comp); |
| 313 | let stride = vb.get_stride(comp); |
| 314 | let (_, h) = vb.get_dimensions(comp); |
| 315 | let data = vb.get_data_mut().unwrap(); |
| 316 | let mut line0 = vec![0; stride]; |
| 317 | let mut line1 = vec![0; stride]; |
| 318 | swap_plane(&mut data[off..], stride, h, line0.as_mut_slice(), line1.as_mut_slice()); |
| 319 | } |
| 320 | }, |
| 321 | NABufferType::Video16(ref mut vb) => { |
| 322 | let ncomp = vb.get_num_components(); |
| 323 | for comp in 0..ncomp { |
| 324 | let off = vb.get_offset(comp); |
| 325 | let stride = vb.get_stride(comp); |
| 326 | let (_, h) = vb.get_dimensions(comp); |
| 327 | let data = vb.get_data_mut().unwrap(); |
| 328 | let mut line0 = vec![0; stride]; |
| 329 | let mut line1 = vec![0; stride]; |
| 330 | swap_plane(&mut data[off..], stride, h, line0.as_mut_slice(), line1.as_mut_slice()); |
| 331 | } |
| 332 | }, |
| 333 | NABufferType::Video32(ref mut vb) => { |
| 334 | let ncomp = vb.get_num_components(); |
| 335 | for comp in 0..ncomp { |
| 336 | let off = vb.get_offset(comp); |
| 337 | let stride = vb.get_stride(comp); |
| 338 | let (_, h) = vb.get_dimensions(comp); |
| 339 | let data = vb.get_data_mut().unwrap(); |
| 340 | let mut line0 = vec![0; stride]; |
| 341 | let mut line1 = vec![0; stride]; |
| 342 | swap_plane(&mut data[off..], stride, h, line0.as_mut_slice(), line1.as_mut_slice()); |
| 343 | } |
| 344 | }, |
| 345 | NABufferType::VideoPacked(ref mut vb) => { |
| 346 | let ncomp = vb.get_num_components(); |
| 347 | for comp in 0..ncomp { |
| 348 | let off = vb.get_offset(comp); |
| 349 | let stride = vb.get_stride(comp); |
| 350 | let (_, h) = vb.get_dimensions(comp); |
| 351 | let data = vb.get_data_mut().unwrap(); |
| 352 | let mut line0 = vec![0; stride]; |
| 353 | let mut line1 = vec![0; stride]; |
| 354 | swap_plane(&mut data[off..], stride, h, line0.as_mut_slice(), line1.as_mut_slice()); |
| 355 | } |
| 356 | }, |
| 357 | _ => { return Err(ScaleError::InvalidArgument); }, |
| 358 | }; |
| 359 | Ok(()) |
| 360 | } |
| 361 | |
| 362 | impl NAScale { |
| 363 | /// Constructs a new `NAScale` instance. |
| 364 | pub fn new(fmt_in: ScaleInfo, fmt_out: ScaleInfo) -> ScaleResult<Self> { |
| 365 | let pipeline; |
| 366 | let just_convert = (fmt_in.width == fmt_out.width) && (fmt_in.height == fmt_out.height); |
| 367 | if fmt_in != fmt_out { |
| 368 | pipeline = build_pipeline(&fmt_in, &fmt_out, just_convert)?; |
| 369 | } else { |
| 370 | pipeline = None; |
| 371 | } |
| 372 | Ok(Self { fmt_in, fmt_out, just_convert, pipeline }) |
| 373 | } |
| 374 | /// Checks whether requested conversion operation is needed at all. |
| 375 | pub fn needs_processing(&self) -> bool { self.pipeline.is_some() } |
| 376 | /// Returns the input image format. |
| 377 | pub fn get_in_fmt(&self) -> ScaleInfo { self.fmt_in } |
| 378 | /// Returns the output image format. |
| 379 | pub fn get_out_fmt(&self) -> ScaleInfo { self.fmt_out } |
| 380 | /// Performs the image format conversion. |
| 381 | pub fn convert(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType) -> ScaleResult<()> { |
| 382 | let in_info = pic_in.get_video_info(); |
| 383 | let out_info = pic_out.get_video_info(); |
| 384 | if in_info.is_none() || out_info.is_none() { return Err(ScaleError::InvalidArgument); } |
| 385 | let in_info = in_info.unwrap(); |
| 386 | let out_info = out_info.unwrap(); |
| 387 | if self.just_convert && |
| 388 | (in_info.get_width() != out_info.get_width() || in_info.get_height() != out_info.get_height()) { |
| 389 | return Err(ScaleError::InvalidArgument); |
| 390 | } |
| 391 | let needs_flip = in_info.is_flipped() ^ out_info.is_flipped(); |
| 392 | check_format(in_info, &self.fmt_in, self.just_convert)?; |
| 393 | check_format(out_info, &self.fmt_out, self.just_convert)?; |
| 394 | let ret = if let Some(ref mut pipe) = self.pipeline { |
| 395 | pipe.process(pic_in, pic_out) |
| 396 | } else { |
| 397 | copy(pic_in, pic_out); |
| 398 | Ok(()) |
| 399 | }; |
| 400 | if ret.is_ok() && needs_flip { |
| 401 | flip_picture(pic_out)?; |
| 402 | } |
| 403 | ret |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | #[cfg(test)] |
| 408 | mod test { |
| 409 | use super::*; |
| 410 | |
| 411 | fn fill_pic(pic: &mut NABufferType, val: u8) { |
| 412 | if let Some(ref mut buf) = pic.get_vbuf() { |
| 413 | let data = buf.get_data_mut().unwrap(); |
| 414 | for el in data.iter_mut() { *el = val; } |
| 415 | } else if let Some(ref mut buf) = pic.get_vbuf16() { |
| 416 | let data = buf.get_data_mut().unwrap(); |
| 417 | for el in data.iter_mut() { *el = val as u16; } |
| 418 | } else if let Some(ref mut buf) = pic.get_vbuf32() { |
| 419 | let data = buf.get_data_mut().unwrap(); |
| 420 | for el in data.iter_mut() { *el = (val as u32) * 0x01010101; } |
| 421 | } |
| 422 | } |
| 423 | #[test] |
| 424 | fn test_convert() { |
| 425 | let mut in_pic = alloc_video_buffer(NAVideoInfo::new(1, 1, false, RGB565_FORMAT), 3).unwrap(); |
| 426 | fill_pic(&mut in_pic, 42); |
| 427 | let mut out_pic = alloc_video_buffer(NAVideoInfo::new(1, 1, false, RGB24_FORMAT), 3).unwrap(); |
| 428 | fill_pic(&mut out_pic, 0); |
| 429 | let ifmt = get_scale_fmt_from_pic(&in_pic); |
| 430 | let ofmt = get_scale_fmt_from_pic(&out_pic); |
| 431 | let mut scaler = NAScale::new(ifmt, ofmt).unwrap(); |
| 432 | scaler.convert(&in_pic, &mut out_pic).unwrap(); |
| 433 | let obuf = out_pic.get_vbuf().unwrap(); |
| 434 | let odata = obuf.get_data(); |
| 435 | assert_eq!(odata[0], 0x0); |
| 436 | assert_eq!(odata[1], 0x4); |
| 437 | assert_eq!(odata[2], 0x52); |
| 438 | |
| 439 | let mut in_pic = alloc_video_buffer(NAVideoInfo::new(4, 4, false, RGB24_FORMAT), 3).unwrap(); |
| 440 | fill_pic(&mut in_pic, 42); |
| 441 | let mut out_pic = alloc_video_buffer(NAVideoInfo::new(4, 4, false, YUV420_FORMAT), 3).unwrap(); |
| 442 | fill_pic(&mut out_pic, 0); |
| 443 | let ifmt = get_scale_fmt_from_pic(&in_pic); |
| 444 | let ofmt = get_scale_fmt_from_pic(&out_pic); |
| 445 | let mut scaler = NAScale::new(ifmt, ofmt).unwrap(); |
| 446 | scaler.convert(&in_pic, &mut out_pic).unwrap(); |
| 447 | let obuf = out_pic.get_vbuf().unwrap(); |
| 448 | let yoff = obuf.get_offset(0); |
| 449 | let uoff = obuf.get_offset(1); |
| 450 | let voff = obuf.get_offset(2); |
| 451 | let odata = obuf.get_data(); |
| 452 | assert_eq!(odata[yoff], 42); |
| 453 | assert!(((odata[uoff] ^ 0x80) as i8).abs() <= 1); |
| 454 | assert!(((odata[voff] ^ 0x80) as i8).abs() <= 1); |
| 455 | let mut scaler = NAScale::new(ofmt, ifmt).unwrap(); |
| 456 | scaler.convert(&out_pic, &mut in_pic).unwrap(); |
| 457 | let obuf = in_pic.get_vbuf().unwrap(); |
| 458 | let odata = obuf.get_data(); |
| 459 | assert_eq!(odata[0], 42); |
| 460 | } |
| 461 | #[test] |
| 462 | fn test_scale() { |
| 463 | let mut in_pic = alloc_video_buffer(NAVideoInfo::new(2, 2, false, RGB565_FORMAT), 3).unwrap(); |
| 464 | fill_pic(&mut in_pic, 42); |
| 465 | let mut out_pic = alloc_video_buffer(NAVideoInfo::new(3, 3, false, RGB565_FORMAT), 3).unwrap(); |
| 466 | fill_pic(&mut out_pic, 0); |
| 467 | let ifmt = get_scale_fmt_from_pic(&in_pic); |
| 468 | let ofmt = get_scale_fmt_from_pic(&out_pic); |
| 469 | let mut scaler = NAScale::new(ifmt, ofmt).unwrap(); |
| 470 | scaler.convert(&in_pic, &mut out_pic).unwrap(); |
| 471 | let obuf = out_pic.get_vbuf16().unwrap(); |
| 472 | let odata = obuf.get_data(); |
| 473 | assert_eq!(odata[0], 42); |
| 474 | } |
| 475 | #[test] |
| 476 | fn test_scale_and_convert() { |
| 477 | let mut in_pic = alloc_video_buffer(NAVideoInfo::new(7, 3, false, RGB565_FORMAT), 3).unwrap(); |
| 478 | fill_pic(&mut in_pic, 42); |
| 479 | let mut out_pic = alloc_video_buffer(NAVideoInfo::new(4, 4, false, YUV420_FORMAT), 3).unwrap(); |
| 480 | fill_pic(&mut out_pic, 0); |
| 481 | let ifmt = get_scale_fmt_from_pic(&in_pic); |
| 482 | let ofmt = get_scale_fmt_from_pic(&out_pic); |
| 483 | let mut scaler = NAScale::new(ifmt, ofmt).unwrap(); |
| 484 | scaler.convert(&in_pic, &mut out_pic).unwrap(); |
| 485 | let obuf = out_pic.get_vbuf().unwrap(); |
| 486 | let yoff = obuf.get_offset(0); |
| 487 | let uoff = obuf.get_offset(1); |
| 488 | let voff = obuf.get_offset(2); |
| 489 | let odata = obuf.get_data(); |
| 490 | assert_eq!(odata[yoff], 28); |
| 491 | assert_eq!(odata[uoff], 154); |
| 492 | assert_eq!(odata[voff], 103); |
| 493 | } |
| 494 | #[test] |
| 495 | fn test_scale_and_convert_to_pal() { |
| 496 | let mut in_pic = alloc_video_buffer(NAVideoInfo::new(7, 3, false, YUV420_FORMAT), 3).unwrap(); |
| 497 | fill_pic(&mut in_pic, 142); |
| 498 | let mut out_pic = alloc_video_buffer(NAVideoInfo::new(4, 4, false, PAL8_FORMAT), 0).unwrap(); |
| 499 | fill_pic(&mut out_pic, 0); |
| 500 | let ifmt = get_scale_fmt_from_pic(&in_pic); |
| 501 | let ofmt = get_scale_fmt_from_pic(&out_pic); |
| 502 | let mut scaler = NAScale::new(ifmt, ofmt).unwrap(); |
| 503 | scaler.convert(&in_pic, &mut out_pic).unwrap(); |
| 504 | let obuf = out_pic.get_vbuf().unwrap(); |
| 505 | let dataoff = obuf.get_offset(0); |
| 506 | let paloff = obuf.get_offset(1); |
| 507 | let odata = obuf.get_data(); |
| 508 | assert_eq!(odata[dataoff], 0); |
| 509 | assert_eq!(odata[paloff], 157); |
| 510 | assert_eq!(odata[paloff + 1], 99); |
| 511 | assert_eq!(odata[paloff + 2], 170); |
| 512 | } |
| 513 | } |