add nihav_qt crate with some QuickTime codecs

[nihav.git] / nihav-qt / src / codecs / imaadpcm.rs

diff --git a/nihav-qt/src/codecs/imaadpcm.rs b/nihav-qt/src/codecs/imaadpcm.rs
new file mode 100644 (file)
index 0000000..1d1a647
--- /dev/null
+++ b/nihav-qt/src/codecs/imaadpcm.rs
@@ -0,0 +1,109 @@
+use nihav_core::codecs::*;
+use nihav_core::io::byteio::*;
+use nihav_codec_support::codecs::imaadpcm::*;
+use std::str::FromStr;
+
+const PACKET_LEN: usize = 34;
+const PACKET_SAMPLES: usize = 64;
+
+struct IMAADPCMDecoder {
+    ainfo:      NAAudioInfo,
+    chmap:      NAChannelMap,
+    ch_state:   [IMAState; 2],
+}
+
+impl IMAADPCMDecoder {
+    fn new() -> Self {
+        Self {
+            ainfo:      NAAudioInfo::new(0, 1, SND_S16P_FORMAT, PACKET_SAMPLES),
+            chmap:      NAChannelMap::new(),
+            ch_state:   [IMAState::new(), IMAState::new()],
+        }
+    }
+}
+
+impl NADecoder for IMAADPCMDecoder {
+    fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
+        if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
+            let channels = ainfo.get_channels() as usize;
+            validate!(channels == 2 || channels == 1);
+            self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), channels as u8, SND_S16P_FORMAT, PACKET_SAMPLES);
+            self.chmap = NAChannelMap::from_str(if channels == 1 { "C" } else { "L,R" }).unwrap();
+            Ok(())
+        } else {
+            Err(DecoderError::InvalidData)
+        }
+    }
+    fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+        let info = pkt.get_stream().get_info();
+        if let NACodecTypeInfo::Audio(_) = info.get_properties() {
+            let pktbuf = pkt.get_buffer();
+            let channels = self.chmap.num_channels();
+            validate!(pktbuf.len() % (PACKET_LEN * channels) == 0);
+            let nblocks = pktbuf.len() / channels / PACKET_LEN;
+            let nsamples = nblocks * PACKET_SAMPLES;
+            let abuf = alloc_audio_buffer(self.ainfo, nsamples, self.chmap.clone())?;
+            let mut adata = abuf.get_abuf_i16().unwrap();
+            let mut off = [adata.get_offset(0), adata.get_offset(1)];
+            let dst = adata.get_data_mut().unwrap();
+
+            for data in pktbuf.chunks(PACKET_LEN * channels) {
+                for ch in 0..channels {
+                    let mut mr = MemoryReader::new_read(&data[PACKET_LEN * ch..][..PACKET_LEN]);
+                    let mut br = ByteReader::new(&mut mr);
+
+                    let init                    = br.read_u16be()?;
+                    let pred = (init as i16) & !0x7F;
+                    let step = (init & 0x7F) as u8;
+                    validate!(step <= IMA_MAX_STEP);
+                    self.ch_state[ch].reset(pred, step);
+
+                    for i in (0..PACKET_SAMPLES).step_by(2) {
+                        let byte                = br.read_byte()?;
+                        dst[off[ch] + i]     = self.ch_state[ch].expand_sample(byte & 0xF);
+                        dst[off[ch] + i + 1] = self.ch_state[ch].expand_sample(byte >> 4);
+                    }
+                    off[ch] += PACKET_SAMPLES;
+                }
+            }
+
+            let mut frm = NAFrame::new_from_pkt(pkt, info.replace_info(NACodecTypeInfo::Audio(self.ainfo)), abuf);
+            frm.set_duration(Some(nsamples as u64));
+            frm.set_keyframe(false);
+            Ok(frm.into_ref())
+        } else {
+            Err(DecoderError::InvalidData)
+        }
+    }
+    fn flush(&mut self) {
+    }
+}
+
+impl NAOptionHandler for IMAADPCMDecoder {
+    fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
+    fn set_options(&mut self, _options: &[NAOption]) { }
+    fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
+}
+
+pub fn get_decoder() -> Box<dyn NADecoder + Send> {
+    Box::new(IMAADPCMDecoder::new())
+}
+
+#[cfg(test)]
+mod test {
+    use nihav_core::codecs::RegisteredDecoders;
+    use nihav_core::demuxers::RegisteredDemuxers;
+    use nihav_codec_support::test::dec_video::*;
+    use crate::qt_register_all_codecs;
+    use nihav_commonfmt::generic_register_all_demuxers;
+    #[test]
+    fn test_ima_adpcm_qt() {
+        let mut dmx_reg = RegisteredDemuxers::new();
+        generic_register_all_demuxers(&mut dmx_reg);
+        let mut dec_reg = RegisteredDecoders::new();
+        qt_register_all_codecs(&mut dec_reg);
+
+        test_decoding("mov", "ima-adpcm-qt", "assets/QT/shuffle-ima41.mov", None, &dmx_reg, &dec_reg,
+                      ExpectedTestResult::MD5([0xba2ad472, 0xd6aee026, 0xb915dd7d, 0xac51314c]));
+    }
+}