introduce interface and support code for encoders

2 files changed, 132 insertions, 0 deletions

diff --git a/nihav-codec-support/src/test/enc_video.rs b/nihav-codec-support/src/test/enc_video.rs
new file mode 100644
index 0000000..1240e83
--- /dev/null
+++ b/nihav-codec-support/src/test/enc_video.rs
@@ -0,0 +1,131 @@
+use std::fs::File;
+use nihav_core::frame::*;
+use nihav_core::codecs::*;
+use nihav_core::demuxers::*;
+use nihav_core::muxers::*;
+use nihav_core::scale::*;
+use nihav_core::soundcvt::*;
+
+pub struct DecoderTestParams {
+    pub demuxer:        &'static str,
+    pub in_name:        &'static str,
+    pub limit:          Option<u64>,
+    pub stream_type:    StreamType,
+    pub dmx_reg:        RegisteredDemuxers,
+    pub dec_reg:        RegisteredDecoders,
+}
+
+pub struct EncoderTestParams {
+    pub muxer:          &'static str,
+    pub enc_name:       &'static str,
+    pub out_name:       &'static str,
+    pub mux_reg:        RegisteredMuxers,
+    pub enc_reg:        RegisteredEncoders,
+}
+
+pub fn test_encoding_to_file(dec_config: &DecoderTestParams, enc_config: &EncoderTestParams, mut enc_params: EncodeParameters) {
+    let dmx_f = dec_config.dmx_reg.find_demuxer(dec_config.demuxer).unwrap();
+    let mut file = File::open(dec_config.in_name).unwrap();
+    let mut fr = FileReader::new_read(&mut file);
+    let mut br = ByteReader::new(&mut fr);
+    let mut dmx = create_demuxer(dmx_f, &mut br).unwrap();
+
+    let in_stream = dmx.get_streams().find(|str| str.get_media_type() == dec_config.stream_type).unwrap();
+    let in_stream_id = in_stream.id;
+    let decfunc = dec_config.dec_reg.find_decoder(in_stream.get_info().get_name()).unwrap();
+    let mut dec = (decfunc)();
+    let mut dsupp = Box::new(NADecoderSupport::new());
+    dec.init(&mut dsupp, in_stream.get_info()).unwrap();
+
+    let mut out_sm = StreamManager::new();
+    enc_params.tb_num = in_stream.tb_num;
+    enc_params.tb_den = in_stream.tb_den;
+
+    if let (NACodecTypeInfo::Video(ref mut vinfo), Some(ref_vinfo)) = (&mut enc_params.format, in_stream.get_info().get_properties().get_video_info()) {
+        if vinfo.width == 0 {
+            vinfo.width  = ref_vinfo.width;
+            vinfo.height = ref_vinfo.height;
+        }
+    }
+    let mut dst_chmap = NAChannelMap::new();
+    if let (NACodecTypeInfo::Audio(ref mut ainfo), Some(ref_ainfo)) = (&mut enc_params.format, in_stream.get_info().get_properties().get_audio_info()) {
+        if ainfo.sample_rate == 0 {
+            ainfo.sample_rate = ref_ainfo.sample_rate;
+        }
+        if ainfo.channels == 0 {
+            ainfo.channels = ref_ainfo.channels;
+        }
+        match ainfo.channels {
+            1 => {
+                dst_chmap.add_channel(NAChannelType::C);
+            },
+            2 => {
+                dst_chmap.add_channel(NAChannelType::L);
+                dst_chmap.add_channel(NAChannelType::R);
+            },
+            _ => panic!("cannot guess channel map"),
+        }
+    }
+
+    let encfunc = enc_config.enc_reg.find_encoder(enc_config.enc_name).unwrap();
+    let mut encoder = (encfunc)();
+    let out_str = encoder.init(0, enc_params).unwrap();
+    out_sm.add_stream(NAStream::clone(&out_str));
+    
+    let mux_f = enc_config.mux_reg.find_muxer(enc_config.muxer).unwrap();
+    let out_name = "assets/test_out/".to_owned() + enc_config.out_name;
+    let file = File::create(&out_name).unwrap();
+    let mut fw = FileWriter::new_write(file);
+    let mut bw = ByteWriter::new(&mut fw);
+    let mut mux = create_muxer(mux_f, out_sm, &mut bw).unwrap();
+
+    let (mut ifmt, dst_vinfo) = if let NACodecTypeInfo::Video(vinfo) = enc_params.format {
+            (ScaleInfo { fmt: vinfo.format, width: vinfo.width, height: vinfo.height },
+             vinfo)
+        } else {
+            (ScaleInfo { fmt: YUV420_FORMAT, width: 2, height: 2 },
+             NAVideoInfo { width: 2, height: 2, format: YUV420_FORMAT, flipped: false })
+        };
+    let ofmt = ifmt;
+    let mut scaler = NAScale::new(ifmt, ofmt).unwrap();
+    let mut cvt_buf = alloc_video_buffer(dst_vinfo, 2).unwrap();
+    loop {
+        let pktres = dmx.get_frame();
+        if let Err(e) = pktres {
+            if e == DemuxerError::EOF { break; }
+            panic!("decoding error");
+        }
+        let pkt = pktres.unwrap();
+        if pkt.get_stream().id != in_stream_id { continue; }
+        let frm = dec.decode(&mut dsupp, &pkt).unwrap();
+        let buf = frm.get_buffer();
+        let cfrm = if let NACodecTypeInfo::Video(_) = enc_params.format {
+                let cur_ifmt = get_scale_fmt_from_pic(&buf);
+                if cur_ifmt != ifmt {
+                    ifmt = cur_ifmt;
+                    scaler = NAScale::new(ifmt, ofmt).unwrap();
+                }
+                scaler.convert(&buf, &mut cvt_buf).unwrap();
+                NAFrame::new(frm.get_time_information(), frm.frame_type, frm.key, frm.get_info(), cvt_buf.clone())
+            } else if let NACodecTypeInfo::Audio(ref dst_ainfo) = enc_params.format {
+                let cvt_buf = convert_audio_frame(&buf, dst_ainfo, &dst_chmap).unwrap();
+                NAFrame::new(frm.get_time_information(), frm.frame_type, frm.key, frm.get_info(), cvt_buf)
+            } else {
+                panic!("unexpected format");
+            };
+        encoder.encode(&cfrm).unwrap();
+        while let Ok(Some(pkt)) = encoder.get_packet() {
+            mux.mux_frame(pkt).unwrap();
+        }
+        if let Some(maxts) = dec_config.limit {
+            if frm.get_pts().unwrap_or(0) >= maxts {
+                break;
+            }
+        }
+    }
+    encoder.flush().unwrap();
+    while let Ok(Some(pkt)) = encoder.get_packet() {
+        mux.mux_frame(pkt).unwrap();
+    }
+    mux.end().unwrap();
+}
diff --git a/nihav-codec-support/src/test/mod.rs b/nihav-codec-support/src/test/mod.rs
index 367be24..2d2cda7 100644
--- a/nihav-codec-support/src/test/mod.rs
+++ b/nihav-codec-support/src/test/mod.rs
@@ -2,6 +2,7 @@
 //!
 //! This module provides functions that may be used in internal test to check that decoders produce output and that they produce expected output.
 pub mod dec_video;
+pub mod enc_video;
 pub mod wavwriter;
 
 mod md5; // for internal checksums only