Canopus HQX decoder

Based on work by Kostya Shishkov <kostya.shishkov@gmail.com>.

Changelog

@@ -19,6 +19,7 @@ version <next>:
 - RTP depacketizer for AC3 payload format (RFC 4184)
 - RTP depacketizer for loss tolerant payload format for MP3 audio (RFC 5219)
 - RTP depacketizer for DV (RFC 6469)
+- Canopus HQX decoder
 
 
 version 11:

doc/general.texi

@@ -222,6 +222,7 @@ library:
 @item Delphine Software International CIN @tab   @tab X
     @tab Multimedia format used by Delphine Software games.
 @item Digital Speech Standard (DSS) @tab   @tab X
+@item Canopus HQX               @tab   @tab X
 @item CD+G                      @tab   @tab X
     @tab Video format used by CD+G karaoke disks
 @item Commodore CDXL            @tab   @tab X

libavcodec/Makefile

@@ -227,6 +227,7 @@ OBJS-$(CONFIG_HEVC_DECODER)            += hevc.o hevc_mvs.o hevc_ps.o hevc_sei.o
                                           hevc_cabac.o hevc_refs.o hevcpred.o    \
                                           hevcdsp.o hevc_filter.o
 OBJS-$(CONFIG_HNM4_VIDEO_DECODER)      += hnm4video.o
+OBJS-$(CONFIG_HQX_DECODER)             += hqx.o hqxvlc.o
 OBJS-$(CONFIG_HUFFYUV_DECODER)         += huffyuv.o huffyuvdec.o
 OBJS-$(CONFIG_HUFFYUV_ENCODER)         += huffyuv.o huffyuvenc.o
 OBJS-$(CONFIG_IDCIN_DECODER)           += idcinvideo.o

libavcodec/allcodecs.c

@@ -164,6 +164,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(H264_QSV,          h264_qsv);
     REGISTER_DECODER(HEVC,              hevc);
     REGISTER_DECODER(HNM4_VIDEO,        hnm4_video);
+    REGISTER_DECODER(HQX,               hqx);
     REGISTER_ENCDEC (HUFFYUV,           huffyuv);
     REGISTER_DECODER(IDCIN,             idcin);
     REGISTER_DECODER(IFF_BYTERUN1,      iff_byterun1);

libavcodec/avcodec.h

@@ -293,6 +293,7 @@ enum AVCodecID {
     AV_CODEC_ID_SGIRLE,
     AV_CODEC_ID_MVC1,
     AV_CODEC_ID_MVC2,
+    AV_CODEC_ID_HQX,
 
     /* various PCM "codecs" */
     AV_CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs

libavcodec/codec_desc.c

@@ -1134,6 +1134,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("SGI RLE 8-bit"),
         .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
     },
+    {
+        .id        = AV_CODEC_ID_HQX,
+        .type      = AVMEDIA_TYPE_VIDEO,
+        .name      = "hqx",
+        .long_name = NULL_IF_CONFIG_SMALL("Canopus HQX"),
+        .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
+    },
 
     /* image codecs */
     {

libavcodec/hqx.h

+/*
+ * Canopus HQX decoder
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_HQX_H
+#define AVCODEC_HQX_H
+
+#include <stdint.h>
+#include "libavutil/mem.h"
+#include "get_bits.h"
+
+enum HQXACMode {
+    HQX_AC_Q0 = 0,
+    HQX_AC_Q8,
+    HQX_AC_Q16,
+    HQX_AC_Q32,
+    HQX_AC_Q64,
+    HQX_AC_Q128,
+    NUM_HQX_AC
+};
+
+typedef struct HQXLUT {
+    int16_t lev;
+    uint8_t run;
+    int8_t  bits;
+} HQXLUT;
+
+typedef struct HQXAC {
+    int lut_bits, extra_bits;
+    const HQXLUT *lut;
+} HQXAC;
+
+typedef struct HQXContext {
+    int format, dcb, width, height;
+    int interlaced;
+
+    DECLARE_ALIGNED(16, int16_t, block)[16][64];
+
+    VLC cbp_vlc;
+    VLC dc_vlc[3];
+} HQXContext;
+
+#define HQX_DC_VLC_BITS 9
+
+extern const HQXAC ff_hqx_ac[NUM_HQX_AC];
+
+int ff_hqx_init_vlcs(HQXContext *ctx);
+
+#endif /* AVCODEC_HQX_H */

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR 16
+#define LIBAVCODEC_VERSION_MINOR 17
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavformat/riff.c

@@ -351,6 +351,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { AV_CODEC_ID_PRORES,       MKTAG('A', 'P', 'C', 'N') },
     { AV_CODEC_ID_PRORES,       MKTAG('A', 'P', 'C', 'H') },
     { AV_CODEC_ID_QTRLE,        MKTAG('r', 'l', 'e', ' ') },
+    { AV_CODEC_ID_HQX,          MKTAG('C', 'H', 'Q', 'X') },
     { AV_CODEC_ID_NONE,         0 }
 };
 

tests/fate/video.mak

@@ -52,6 +52,15 @@ fate-bink-video: $(FATE_BINK_VIDEO)
 FATE_SAMPLES_AVCONV-$(call DEMDEC, BMV, BMV_VIDEO) += fate-bmv-video
 fate-bmv-video: CMD = framecrc -i $(TARGET_SAMPLES)/bmv/SURFING-partial.BMV -pix_fmt rgb24 -an
 
+FATE_CANOPUS_HQX += fate-canopus-hqx422
+fate-canopus-hqx422: CMD = framecrc -i $(TARGET_SAMPLES)/canopus/hqx422.avi -pix_fmt yuv422p16be -an
+
+FATE_CANOPUS_HQX += fate-canopus-hqx422a
+fate-canopus-hqx422a: CMD = framecrc -i $(TARGET_SAMPLES)/canopus/hqx422a.avi -pix_fmt yuv422p16be -an
+
+FATE_SAMPLES_AVCONV-$(call DEMDEC, AVI, HQX) += $(FATE_CANOPUS_HQX)
+fate-canopus-hqx: $(FATE_CANOPUS_HQX)
+
 FATE_SAMPLES_AVCONV-$(call DEMDEC, MPEGPS, CAVS) += fate-cavs
 fate-cavs: CMD = framecrc -i $(TARGET_SAMPLES)/cavs/cavs.mpg -an
 

tests/ref/fate/canopus-hqx422

+#tb 0: 1/25
+0,          0,          0,        1,  1658880, 0x823fcbac

tests/ref/fate/canopus-hqx422a

+#tb 0: 1/25
+0,          0,          0,        1,  8294400, 0x9b38264d