projects / nihav.git / blame
| Commit | Line | Data |
|---|---|---|
| fc39649d KS |
1 | use nihav_core::muxers::*; |
| 2 | ||
| 3 | struct GIFMuxer<'a> { | |
| 4 | bw: &'a mut ByteWriter<'a>, | |
| 5 | single: bool, | |
| 6 | gif87: bool, | |
| 7 | pal_written: bool, | |
| 8 | nloops: u16, | |
| 9 | } | |
| 10 | ||
| 11 | impl<'a> GIFMuxer<'a> { | |
| 12 | fn new(bw: &'a mut ByteWriter<'a>) -> Self { | |
| 13 | Self { | |
| 14 | bw, | |
| 15 | single: false, | |
| 16 | gif87: false, | |
| 17 | pal_written: false, | |
| 18 | nloops: 0, | |
| 19 | } | |
| 20 | } | |
| 21 | fn write_pal(&mut self, pal: &[u8; 1024]) -> MuxerResult<()> { | |
| 22 | let mut nclr = 256; | |
| 23 | for quad in pal.chunks_exact(4).rev() { | |
| 24 | if quad[0] == 0 && quad[1] == 0 && quad[2] == 0 { | |
| 25 | nclr -= 1; | |
| 26 | } else { | |
| 27 | break; | |
| 28 | } | |
| 29 | } | |
| 30 | let mut pal_bits = 1; | |
| 31 | while (1 << pal_bits) < nclr { | |
| 32 | pal_bits += 1; | |
| 33 | } | |
| 34 | self.bw.write_byte(0xF0 | (pal_bits - 1))?; | |
| 35 | self.bw.write_byte(0)?; // background colour index | |
| 36 | self.bw.write_byte(0)?; // aspect ratio | |
| 37 | for quad in pal.chunks_exact(4).take(1 << pal_bits) { | |
| 38 | self.bw.write_buf(&quad[..3])?; | |
| 39 | } | |
| 40 | Ok(()) | |
| 41 | } | |
| 42 | } | |
| 43 | ||
| 44 | impl<'a> MuxCore<'a> for GIFMuxer<'a> { | |
| 45 | fn create(&mut self, strmgr: &StreamManager) -> MuxerResult<()> { | |
| 46 | if strmgr.get_num_streams() != 1 { | |
| 47 | return Err(MuxerError::InvalidArgument); | |
| 48 | } | |
| 49 | let vstr = strmgr.get_stream(0).unwrap(); | |
| 50 | if vstr.get_media_type() != StreamType::Video { | |
| 51 | return Err(MuxerError::UnsupportedFormat); | |
| 52 | } | |
| 53 | let info = vstr.get_info(); | |
| 54 | let vinfo = info.get_properties().get_video_info().unwrap(); | |
| 55 | if vinfo.width > 65535 || vinfo.height > 65535 || !vinfo.format.palette { | |
| 56 | return Err(MuxerError::UnsupportedFormat); | |
| 57 | } | |
| 58 | ||
| 59 | if self.gif87 { | |
| 60 | self.single = true; | |
| 61 | self.bw.write_buf(b"GIF87a")?; | |
| 62 | } else { | |
| 63 | self.bw.write_buf(b"GIF89a")?; | |
| 64 | } | |
| 65 | self.bw.write_u16le(vinfo.width as u16)?; | |
| 66 | self.bw.write_u16le(vinfo.height as u16)?; | |
| 67 | ||
| 68 | Ok(()) | |
| 69 | } | |
| 70 | fn mux_frame(&mut self, strmgr: &StreamManager, pkt: NAPacket) -> MuxerResult<()> { | |
| 71 | if self.bw.tell() == 0 { | |
| 72 | return Err(MuxerError::NotCreated); | |
| 73 | } | |
| 74 | if !self.pal_written { | |
| 75 | let info = strmgr.get_stream(0).unwrap().get_info(); | |
| 76 | let mut tr_idx = None; | |
| 77 | if let Some(ref edata) = info.get_extradata() { | |
| 78 | if edata.len() == 1 { | |
| 79 | tr_idx = Some(edata[0]); | |
| 80 | } else if edata.len() >= 3 { | |
| 81 | self.bw.write_buf(edata)?; | |
| 82 | self.pal_written = true; | |
| 83 | } | |
| 84 | } | |
| 85 | if !self.pal_written { | |
| 86 | let mut pal_found = false; | |
| 87 | for sdata in pkt.side_data.iter() { | |
| 88 | if let NASideData::Palette(_, ref pal) = sdata { | |
| 89 | self.write_pal(pal,)?; | |
| 90 | pal_found = true; | |
| 91 | break; | |
| 92 | } | |
| 93 | } | |
| 94 | if !pal_found { | |
| 95 | return Err(MuxerError::InvalidArgument); | |
| 96 | } | |
| 97 | } | |
| 98 | self.pal_written = true; | |
| 99 | ||
| 100 | if !self.single { | |
| 101 | let vstr = strmgr.get_stream(0).unwrap(); | |
| 102 | ||
| 103 | let delay = NATimeInfo::ts_to_time(1, 100, vstr.tb_num, vstr.tb_den) as u16; | |
| 104 | self.bw.write_byte(0x21)?; // graphic control | |
| 105 | self.bw.write_byte(0xF9)?; // graphic control extension | |
| 106 | self.bw.write_byte(4)?; // block size | |
| 107 | self.bw.write_byte(if tr_idx.is_some() { 1 } else { 0 })?; // flags | |
| 108 | self.bw.write_u16le(delay)?; | |
| 109 | self.bw.write_byte(tr_idx.unwrap_or(0))?; // transparent colour index | |
| 110 | self.bw.write_byte(0x00)?; // block terminator | |
| 111 | ||
| 112 | self.bw.write_byte(0x21)?; // graphic control | |
| 113 | self.bw.write_byte(0xFF)?; // application extension | |
| 114 | let app_id = b"NETSCAPE2.0"; | |
| 115 | self.bw.write_byte(app_id.len() as u8)?; | |
| 116 | self.bw.write_buf(app_id)?; | |
| 117 | self.bw.write_byte(3)?; // application data block length | |
| 118 | self.bw.write_byte(0x01)?; | |
| 119 | self.bw.write_u16le(self.nloops)?; | |
| 120 | self.bw.write_byte(0x00)?; // block terminator | |
| 121 | } | |
| 122 | } else if self.single { // just one frame is expected | |
| 123 | return Err(MuxerError::InvalidArgument); | |
| 124 | } | |
| 125 | ||
| 126 | // buffer is supposed to have all the data starting from image descriptor | |
| 127 | let src = pkt.get_buffer(); | |
| 128 | self.bw.write_buf(&src)?; | |
| 129 | Ok(()) | |
| 130 | } | |
| 131 | fn flush(&mut self) -> MuxerResult<()> { | |
| 132 | Ok(()) | |
| 133 | } | |
| 134 | fn end(&mut self) -> MuxerResult<()> { | |
| 135 | self.bw.write_byte(0x3B)?; // GIF terminator | |
| 136 | Ok(()) | |
| 137 | } | |
| 138 | } | |
| 139 | ||
| 140 | const MUXER_OPTS: &[NAOptionDefinition] = &[ | |
| 141 | NAOptionDefinition { | |
| 142 | name: "gif87", description: "Create GIF87 image", | |
| 143 | opt_type: NAOptionDefinitionType::Bool }, | |
| 144 | NAOptionDefinition { | |
| 145 | name: "single", description: "Create single image", | |
| 146 | opt_type: NAOptionDefinitionType::Bool }, | |
| 147 | NAOptionDefinition { | |
| 148 | name: "loops", description: "Number of times to loop the animation", | |
| 149 | opt_type: NAOptionDefinitionType::Int(Some(0), Some(65535)) }, | |
| 150 | ]; | |
| 151 | ||
| 152 | impl<'a> NAOptionHandler for GIFMuxer<'a> { | |
| 153 | fn get_supported_options(&self) -> &[NAOptionDefinition] { MUXER_OPTS } | |
| 154 | fn set_options(&mut self, options: &[NAOption]) { | |
| 155 | for option in options.iter() { | |
| 156 | for opt_def in MUXER_OPTS.iter() { | |
| 157 | if opt_def.check(option).is_ok() { | |
| 158 | match option.name { | |
| 159 | "gif87" => { | |
| 160 | if let NAValue::Bool(bval) = option.value { | |
| 161 | self.gif87 = bval; | |
| 162 | } | |
| 163 | }, | |
| 164 | "single" => { | |
| 165 | if let NAValue::Bool(bval) = option.value { | |
| 166 | self.single = bval; | |
| 167 | } | |
| 168 | }, | |
| 169 | "loops" => { | |
| 170 | if let NAValue::Int(ival) = option.value { | |
| 171 | self.nloops = ival as u16; | |
| 172 | } | |
| 173 | }, | |
| 174 | _ => {}, | |
| 175 | }; | |
| 176 | } | |
| 177 | } | |
| 178 | } | |
| 179 | } | |
| 180 | fn query_option_value(&self, name: &str) -> Option<NAValue> { | |
| 181 | match name { | |
| 182 | "gif87" => Some(NAValue::Bool(self.gif87)), | |
| 183 | "single" => Some(NAValue::Bool(self.single)), | |
| 184 | "loops" => Some(NAValue::Int(i64::from(self.nloops))), | |
| 185 | _ => None, | |
| 186 | } | |
| 187 | } | |
| 188 | } | |
| 189 | ||
| 190 | pub struct GIFMuxerCreator {} | |
| 191 | ||
| 192 | impl MuxerCreator for GIFMuxerCreator { | |
| 193 | fn new_muxer<'a>(&self, bw: &'a mut ByteWriter<'a>) -> Box<dyn MuxCore<'a> + 'a> { | |
| 194 | Box::new(GIFMuxer::new(bw)) | |
| 195 | } | |
| 196 | fn get_name(&self) -> &'static str { "gif" } | |
| 197 | fn get_capabilities(&self) -> MuxerCapabilities { MuxerCapabilities::SingleVideo("gif") } | |
| 198 | } | |
| 199 | ||
| 200 | #[cfg(test)] | |
| 201 | mod test { | |
| 202 | use nihav_core::codecs::*; | |
| 203 | use nihav_core::demuxers::*; | |
| 204 | use nihav_core::muxers::*; | |
| 205 | use nihav_codec_support::test::enc_video::*; | |
| 206 | use crate::*; | |
| 207 | ||
| 208 | #[test] | |
| 209 | fn test_gif_muxer() { | |
| 210 | let mut dmx_reg = RegisteredDemuxers::new(); | |
| 211 | generic_register_all_demuxers(&mut dmx_reg); | |
| 212 | // sample: https://samples.mplayerhq.hu/image-samples/GIF/3D.gif | |
| 213 | let dec_config = DecoderTestParams { | |
| 214 | demuxer: "gif", | |
| 215 | in_name: "assets/Misc/3D.gif", | |
| 216 | limit: None, | |
| 217 | stream_type: StreamType::None, | |
| 218 | dmx_reg, dec_reg: RegisteredDecoders::new(), | |
| 219 | }; | |
| 220 | let mut mux_reg = RegisteredMuxers::new(); | |
| 221 | generic_register_all_muxers(&mut mux_reg); | |
| 222 | /*let enc_config = EncoderTestParams { | |
| 223 | muxer: "gif", | |
| 224 | enc_name: "", | |
| 225 | out_name: "muxed.gif", | |
| 226 | mux_reg, enc_reg: RegisteredEncoders::new(), | |
| 227 | }; | |
| 228 | test_remuxing(&dec_config, &enc_config);*/ | |
| 229 | test_remuxing_md5(&dec_config, "gif", &mux_reg, | |
| 230 | [0x7192b724, 0x2bc4fd05, 0xaa65f268, 0x3929e8bf]); | |
| 231 | } | |
| 232 | } |