| 189 | } |
| 190 | |
| 191 | AVPixelFormat FindBestPixelFormat(const std::vector<AVPixelFormat> &Dsts, AVPixelFormat Src) { |
| 192 | // some trivial special cases to make sure there's as little conversion as possible |
| 193 | if (Dsts.empty()) |
| 194 | return AV_PIX_FMT_NONE; |
| 195 | if (Dsts.size() == 1) |
| 196 | return Dsts[0]; |
| 197 | |
| 198 | // is the input in the output? |
| 199 | auto i = std::find(Dsts.begin(), Dsts.end(), Src); |
| 200 | if (i != Dsts.end()) |
| 201 | return Src; |
| 202 | |
| 203 | // If it's an evil paletted format pretend it's normal RGB when calculating loss |
| 204 | if (Src == AV_PIX_FMT_PAL8) |
| 205 | Src = AV_PIX_FMT_RGB32; |
| 206 | |
| 207 | std::vector<AVPixelFormat> OutputDsts; |
| 208 | for (auto DstFmt = Dsts.begin(); DstFmt != Dsts.end(); ++DstFmt) { |
| 209 | // Skip outputing to formwats we can't convert to, this avoids swscale init failures later in the code |
| 210 | if (sws_isSupportedOutput(*DstFmt)) |
| 211 | OutputDsts.push_back(*DstFmt); |
| 212 | } |
| 213 | |
| 214 | if (OutputDsts.empty()) |
| 215 | return AV_PIX_FMT_NONE; |
| 216 | |
| 217 | i = OutputDsts.begin(); |
| 218 | LossAttributes Loss = CalculateLoss(*i++, Src); |
| 219 | for (; i != OutputDsts.end(); ++i) { |
| 220 | LossAttributes CLoss = CalculateLoss(*i, Src); |
| 221 | if (Loss.CSLoss >= 3 && CLoss.CSLoss < Loss.CSLoss) { // favor the same color format output |
| 222 | Loss = CLoss; |
| 223 | } else if (Loss.DepthDifference >= 0 && CLoss.DepthDifference >= 0) { // focus on chroma undersamling and conversion loss if the target depth has been achieved |
| 224 | if ((CLoss.ChromaUndersampling < Loss.ChromaUndersampling) |
| 225 | || (CLoss.ChromaUndersampling == Loss.ChromaUndersampling && CLoss.CSLoss < Loss.CSLoss) |
| 226 | || (CLoss.ChromaUndersampling == Loss.ChromaUndersampling && CLoss.CSLoss == Loss.CSLoss && CLoss.DepthDifference < Loss.DepthDifference) |
| 227 | || (CLoss.ChromaUndersampling == Loss.ChromaUndersampling && CLoss.CSLoss == Loss.CSLoss |
| 228 | && CLoss.DepthDifference == Loss.DepthDifference && CLoss.ChromaOversampling < Loss.ChromaOversampling)) |
| 229 | Loss = CLoss; |
| 230 | } else { // put priority on reaching the same depth as the input |
| 231 | if ((CLoss.DepthDifference > Loss.DepthDifference) |
| 232 | || (CLoss.DepthDifference == Loss.DepthDifference && CLoss.ChromaUndersampling < Loss.ChromaUndersampling) |
| 233 | || (CLoss.DepthDifference == Loss.DepthDifference && CLoss.ChromaUndersampling == Loss.ChromaUndersampling && CLoss.CSLoss < Loss.CSLoss) |
| 234 | || (CLoss.DepthDifference == Loss.DepthDifference && CLoss.ChromaUndersampling == Loss.ChromaUndersampling |
| 235 | && CLoss.CSLoss == Loss.CSLoss && CLoss.ChromaOversampling < Loss.ChromaOversampling)) |
| 236 | Loss = CLoss; |
| 237 | else if (CLoss.DepthDifference == Loss.DepthDifference && CLoss.ChromaUndersampling == Loss.ChromaUndersampling |
| 238 | && CLoss.CSLoss == Loss.CSLoss && CLoss.ChromaOversampling == Loss.ChromaOversampling && CLoss.CSGain < Loss.CSGain) |
| 239 | Loss = CLoss; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | return Loss.Format; |
| 244 | } |
| 245 | |
| 246 | void ParseVP8(const uint8_t Buf, bool *Invisible, int *PictType) { |
| 247 | *PictType = (Buf & 0x01) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I; |
no test coverage detected