avcodec: Cineform HD Decoder

Decodes YUV 4:2:2 10-bit and RGB 12-bit files.
Older files with more subbands, skips, Bayer, alpha not supported.
Alpha requires addition of GBRAP12 pixel format.

1 files changed, 112 insertions, 0 deletions

diff --git a/libavcodec/cfhd.h b/libavcodec/cfhd.h
new file mode 100644
index 0000000000..a26312404f
--- /dev/null
+++ b/libavcodec/cfhd.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2015 Kieran Kunhya
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CFHD_H
+#define AVCODEC_CFHD_H
+
+#include <stdint.h>
+
+#include "libavutil/avassert.h"
+
+#include "avcodec.h"
+#include "get_bits.h"
+
+#define VLC_BITS 9
+#define NB_VLC_TABLE_9 (71+3)
+#define NB_VLC_TABLE_18 (263+1)
+
+typedef struct CFHD_RL_VLC_ELEM {
+    int16_t level;
+    int8_t len;
+    uint16_t run;
+} CFHD_RL_VLC_ELEM;
+
+#define DWT_LEVELS 3
+
+typedef struct SubBand {
+    int level;
+    int orientation;
+    int stride;
+    int a_width;
+    int width;
+    int a_height;
+    int height;
+    int pshift;
+    int quant;
+    uint8_t *ibuf;
+} SubBand;
+
+typedef struct Plane {
+    int width;
+    int height;
+    ptrdiff_t stride;
+
+    int16_t *idwt_buf;
+    int16_t *idwt_tmp;
+
+    /* TODO: merge this into SubBand structure */
+    int16_t *subband[10];
+    int16_t *l_h[8];
+
+    SubBand band[DWT_LEVELS][4];
+} Plane;
+
+typedef struct CFHDContext {
+    AVCodecContext *avctx;
+
+    CFHD_RL_VLC_ELEM table_9_rl_vlc[2088];
+    VLC vlc_9;
+
+    CFHD_RL_VLC_ELEM table_18_rl_vlc[4572];
+    VLC vlc_18;
+
+    GetBitContext gb;
+
+    int chroma_x_shift;
+    int chroma_y_shift;
+
+    int coded_width;
+    int coded_height;
+
+    int a_width;
+    int a_height;
+
+    int bpc;
+    int channel_cnt;
+    int subband_cnt;
+    int channel_num;
+    uint8_t lowpass_precision;
+    uint16_t quantisation;
+    int wavelet_depth;
+    int pshift;
+
+    int codebook;
+    int subband_num;
+    int level;
+    int subband_num_actual;
+
+    uint8_t prescale_shift[3];
+    Plane plane[4];
+
+} CFHDContext;
+
+int ff_cfhd_init_vlcs(CFHDContext *s);
+
+#endif /* AVCODEC_CFHD_H */