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, 749 insertions, 0 deletions

diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c
new file mode 100644
index 0000000000..115081c68e
--- /dev/null
+++ b/libavcodec/cfhd.c
@@ -0,0 +1,749 @@
+/*
+ * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * CFHD Video Decoder
+ */
+
+#include "libavutil/buffer.h"
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "bytestream.h"
+#include "thread.h"
+#include "cfhd.h"
+
+#define SUBBAND_COUNT 10
+
+static av_cold int cfhd_decode_init(AVCodecContext *avctx)
+{
+    CFHDContext *s = avctx->priv_data;
+
+    avctx->bits_per_raw_sample = 10;
+    s->avctx                   = avctx;
+    avctx->width               = 0;
+    avctx->height              = 0;
+
+    return ff_cfhd_init_vlcs(s);
+}
+
+static void init_plane_defaults(CFHDContext *s)
+{
+    s->subband_num        = 0;
+    s->level              = 0;
+    s->subband_num_actual = 0;
+}
+
+static void init_frame_defaults(CFHDContext *s)
+{
+    s->coded_width       = 0;
+    s->coded_height      = 0;
+    s->bpc               = 10;
+    s->channel_cnt       = 4;
+    s->subband_cnt       = 10;
+    s->channel_num       = 0;
+    s->lowpass_precision = 16;
+    s->quantisation      = 1;
+    s->wavelet_depth     = 3;
+    s->pshift            = 1;
+    s->codebook          = 0;
+    init_plane_defaults(s);
+}
+
+/* TODO: merge with VLC tables or use LUT */
+static inline int dequant_and_decompand(int level, int quantisation)
+{
+    int64_t abslevel = abs(level);
+    return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) * FFSIGN(level) * quantisation;
+}
+
+static inline void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride,
+                          int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
+{
+    int16_t tmp;
+
+    int i;
+    for (i = 0; i < len; i++) {
+        if (i == 0) {
+            tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
+            output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
+            if (clip)
+                output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
+
+            tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
+            output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
+            if (clip)
+                output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
+        } else if (i == len-1) {
+            tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
+            output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
+            if (clip)
+                output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
+
+            tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
+            output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
+            if (clip)
+                output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
+        } else {
+            tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
+            output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
+            if (clip)
+                output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
+
+            tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
+            output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
+            if (clip)
+                output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
+        }
+    }
+}
+
+static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width)
+{
+    filter(output, 1, low, 1, high, 1, width, 0);
+}
+
+static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, uint8_t clip)
+{
+    filter(output, 1, low, 1, high, 1, width, clip);
+}
+
+static void vert_filter(int16_t *output, int out_stride, int16_t *low, int low_stride,
+                        int16_t *high, int high_stride, int len)
+{
+    filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
+}
+
+static void free_buffers(AVCodecContext *avctx)
+{
+    CFHDContext *s = avctx->priv_data;
+    int i;
+
+    for (i = 0; i < 3; i++) {
+        av_freep(&s->plane[i].idwt_buf);
+        av_freep(&s->plane[i].idwt_tmp);
+    }
+    s->a_height = 0;
+    s->a_width  = 0;
+}
+
+static int alloc_buffers(AVCodecContext *avctx)
+{
+    CFHDContext *s = avctx->priv_data;
+    int i, j, k, ret;
+
+    if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
+        return ret;
+
+    avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
+
+    for (i = 0; i < 3; i++) {
+        int width = i ? avctx->width >> s->chroma_x_shift : avctx->width;
+        int height = i ? avctx->height >> s->chroma_y_shift : avctx->height;
+        int stride = FFALIGN(width / 8, 8) * 8;
+        int w8, h8, w4, h4, w2, h2;
+        height = FFALIGN(height / 8, 2) * 8;
+        s->plane[i].width = width;
+        s->plane[i].height = height;
+        s->plane[i].stride = stride;
+
+        w8 = FFALIGN(s->plane[i].width / 8, 8);
+        h8 = FFALIGN(s->plane[i].height / 8, 2);
+        w4 = w8 * 2;
+        h4 = h8 * 2;
+        w2 = w4 * 2;
+        h2 = h4 * 2;
+
+        s->plane[i].idwt_buf = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_buf));
+        s->plane[i].idwt_tmp = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
+        if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp) {
+            return AVERROR(ENOMEM);
+        }
+
+        s->plane[i].subband[0] = s->plane[i].idwt_buf;
+        s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
+        s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
+        s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
+        s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
+        s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
+        s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
+        s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
+        s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
+        s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
+
+        for (j = 0; j < DWT_LEVELS; j++) {
+            for(k = 0; k < 4; k++) {
+                s->plane[i].band[j][k].a_width  = w8 << j;
+                s->plane[i].band[j][k].a_height = h8 << j;
+            }
+        }
+
+        /* ll2 and ll1 commented out because they are done in-place */
+        s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
+        s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
+        //s->plane[i].l_h[2] = ll2;
+        s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
+        s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
+        //s->plane[i].l_h[5] = ll1;
+        s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
+        s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
+    }
+
+    s->a_height = s->coded_height;
+    s->a_width  = s->coded_width;
+
+    return 0;
+}
+
+static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
+                       AVPacket *avpkt)
+{
+    CFHDContext *s = avctx->priv_data;
+    GetByteContext gb;
+    ThreadFrame frame = { .f = data };
+    AVFrame *pic = data;
+    int ret = 0, i, j, plane;
+    int16_t *coeff_data;
+
+    avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
+    init_frame_defaults(s);
+
+    bytestream2_init(&gb, avpkt->data, avpkt->size);
+
+    while (bytestream2_get_bytes_left(&gb) > 4) {
+        /* Bit weird but implement the tag parsing as the spec says */
+        uint16_t tagu   = bytestream2_get_be16(&gb);
+        int16_t tag     = (int16_t)tagu;
+        int8_t tag8     = (int8_t)(tagu >> 8);
+        uint16_t abstag = abs(tag);
+        int8_t abs_tag8 = abs(tag8);
+        uint16_t data   = bytestream2_get_be16(&gb);
+        if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
+            av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
+        } else if (tag == 20) {
+            av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
+            s->coded_width = data;
+        } else if (tag == 21) {
+            av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
+            s->coded_height = data;
+        } else if (tag == 101) {
+            av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
+            s->bpc = data;
+        } else if (tag == 12) {
+            av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
+            s->channel_cnt = data;
+            if (data != 3) {
+                av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
+                ret = AVERROR_PATCHWELCOME;
+                break;
+            }
+        } else if (tag == 14) {
+            av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
+            if (data != SUBBAND_COUNT) {
+                av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
+                ret = AVERROR_PATCHWELCOME;
+                break;
+            }
+        } else if (tag == 62) {
+            s->channel_num = data;
+            av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
+            if (s->channel_num > 2) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+            init_plane_defaults(s);
+        } else if (tag == 48) {
+            if (s->subband_num != 0 && data == 1)  // hack
+                s->level++;
+            av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
+            s->subband_num = data;
+            if (s->level > DWT_LEVELS) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+            if (s->subband_num > 3) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 51) {
+            av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
+            s->subband_num_actual = data;
+            if (s->subband_num_actual >= 10) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 35)
+            av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
+        else if (tag == 53) {
+            s->quantisation = data;
+            av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
+        } else if (tag == 109) {
+            s->prescale_shift[0] = (data >> 0) & 0x7;
+            s->prescale_shift[1] = (data >> 3) & 0x7;
+            s->prescale_shift[2] = (data >> 6) & 0x7;
+            av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
+        } else if (tag == 27) {
+            s->plane[s->channel_num].band[0][0].width  = data;
+            s->plane[s->channel_num].band[0][0].stride = data;
+            av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
+            if (data < 2 || (data & 1) || data > s->plane[s->channel_num].band[0][0].a_width) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 28) {
+            s->plane[s->channel_num].band[0][0].height = data;
+            av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
+            if (data < 2 || data > s->plane[s->channel_num].band[0][0].height) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 1)
+            av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
+        else if (tag == 10) {
+            if (data != 0) {
+                avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16" is unsupported\n", data);
+                ret = AVERROR_PATCHWELCOME;
+                break;
+            }
+            av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
+        } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
+            av_log(avctx, AV_LOG_DEBUG, "Small chunk length %"PRIu16" %s\n", data * 4, tag < 0 ? "optional" : "required");
+            bytestream2_skipu(&gb, data * 4);
+        } else if (tag == 23) {
+            av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
+            avpriv_report_missing_feature(avctx, "Skip frame not supported\n");
+            ret = AVERROR_PATCHWELCOME;
+            break;
+        } else if (tag == 2) {
+            av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
+            for (i = 0; i < data; i++) {
+                uint16_t tag2 = bytestream2_get_be16(&gb);
+                uint16_t val2 = bytestream2_get_be16(&gb);
+                av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
+            }
+        } else if (tag == 41) {
+            s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
+            s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
+            av_log(avctx, AV_LOG_DEBUG, "Highpass width %i channel %i level %i subband %i\n", data, s->channel_num, s->level, s->subband_num);
+            if (data < 2 || (data & 1)) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 42) {
+            s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
+            av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
+            if (data < 2) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 49) {
+            s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
+            s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
+            av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
+            if (data < 2 || (data & 1)) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 50) {
+            s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
+            av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
+            if (data < 2) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 71) {
+            s->codebook = data;
+            av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
+        } else if (tag == 72) {
+            s->codebook = data;
+            av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
+        } else if (tag == 70) {
+            av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
+            s->bpc = data;
+            if (!(s->bpc == 10 || s->bpc == 12)) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
+                ret = AVERROR(EINVAL);
+                break;
+            }
+        } else if (tag == 84) {
+            av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
+            if (data == 1)
+                avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
+            else if (data == 3)
+                avctx->pix_fmt = AV_PIX_FMT_GBRP12;
+            else {
+                avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16" is unsupported\n", data);
+                ret = AVERROR_PATCHWELCOME;
+                break;
+            }
+        } else
+            av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
+
+        /* Some kind of end of header tag */
+        if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height && avctx->pix_fmt != AV_PIX_FMT_NONE) {
+            if (s->a_width != s->coded_width || s->a_height != s->coded_height) {
+                free_buffers(avctx);
+                if ((ret = alloc_buffers(avctx)) < 0) {
+                    free_buffers(avctx);
+                    return ret;
+                }
+            }
+
+            if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
+                return ret;
+
+            s->coded_width = 0;
+            s->coded_height = 0;
+        }
+        coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
+
+        /* Lowpass coefficients */
+        if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
+            int lowpass_height = s->plane[s->channel_num].band[0][0].height;
+            int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
+            int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
+            int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
+
+            if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
+                lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
+                av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
+                ret = AVERROR(EINVAL);
+                goto end;
+            }
+
+            av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %"PRIu16" height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
+            for (i = 0; i < lowpass_height; i++) {
+                for (j = 0; j < lowpass_width; j++)
+                    coeff_data[j] = bytestream2_get_be16u(&gb);
+
+                coeff_data += lowpass_width;
+            }
+
+            /* Copy last line of coefficients if odd height */
+            if (lowpass_height & 1) {
+                memcpy(&coeff_data[lowpass_height * lowpass_width],
+                       &coeff_data[(lowpass_height - 1) * lowpass_width],
+                       lowpass_width * sizeof(*coeff_data));
+            }
+
+            av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %"PRIu16"\n", lowpass_width * lowpass_height);
+        }
+
+        if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
+            int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
+            int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
+            int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
+            int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
+            int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
+            int expected = highpass_height * highpass_stride;
+            int a_expected = highpass_a_height * highpass_a_width;
+            int level, run, coeff;
+            int count = 0, bytes;
+
+            if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < expected) {
+                av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficents\n");
+                ret = AVERROR(EINVAL);
+                goto end;
+            }
+
+            av_log(avctx, AV_LOG_DEBUG, "Start subband coeffs plane %i level %i codebook %i expected %i\n", s->channel_num, s->level, s->codebook, expected);
+
+            init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
+            {
+                OPEN_READER(re, &s->gb);
+                if (!s->codebook) {
+                    while (1) {
+                        UPDATE_CACHE(re, &s->gb);
+                        GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
+                                   VLC_BITS, 3, 1);
+
+                        /* escape */
+                        if (level == 64)
+                            break;
+
+                        count += run;
+
+                        if (count > expected)
+                            break;
+
+                        coeff = dequant_and_decompand(level, s->quantisation);
+                        for (i = 0; i < run; i++)
+                            *coeff_data++ = coeff;
+                    }
+                } else {
+                    while (1) {
+                        UPDATE_CACHE(re, &s->gb);
+                        GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
+                                   VLC_BITS, 3, 1);
+
+                        /* escape */
+                        if (level == 255 && run == 2)
+                            break;
+
+                        count += run;
+
+                        if (count > expected)
+                            break;
+
+                        coeff = dequant_and_decompand(level, s->quantisation);
+                        for (i = 0; i < run; i++)
+                            *coeff_data++ = coeff;
+                    }
+                }
+                CLOSE_READER(re, &s->gb);
+            }
+
+            if (count > expected) {
+                av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
+                ret = AVERROR(EINVAL);
+                goto end;
+            }
+
+            bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
+            if (bytes > bytestream2_get_bytes_left(&gb)) {
+                av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
+                ret = AVERROR(EINVAL);
+                goto end;
+            } else
+                bytestream2_seek(&gb, bytes, SEEK_CUR);
+
+            av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
+            s->codebook = 0;
+
+            /* Copy last line of coefficients if odd height */
+            if (highpass_height & 1) {
+                memcpy(&coeff_data[highpass_height * highpass_stride],
+                       &coeff_data[(highpass_height - 1) * highpass_stride],
+                       highpass_stride * sizeof(*coeff_data));
+            }
+        }
+    }
+
+    if (!s->a_width || !s->a_height || s->coded_width || s->coded_height) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
+        ret = AVERROR(EINVAL);
+        goto end;
+    }
+
+    for (plane = 0; plane < 3 && !ret; plane++) {
+        /* level 1 */
+        int lowpass_height  = s->plane[plane].band[0][0].height;
+        int lowpass_width   = s->plane[plane].band[0][0].width;
+        int highpass_stride = s->plane[plane].band[0][1].stride;
+        int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : 0;
+        int16_t *low, *high, *output, *dst;
+
+        if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
+            !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
+            av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
+            ret = AVERROR(EINVAL);
+            goto end;
+        }
+
+        av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
+
+        low    = s->plane[plane].subband[0];
+        high   = s->plane[plane].subband[2];
+        output = s->plane[plane].l_h[0];
+        for (i = 0; i < lowpass_width; i++) {
+            vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
+            low++;
+            high++;
+            output++;
+        }
+
+        low    = s->plane[plane].subband[1];
+        high   = s->plane[plane].subband[3];
+        output = s->plane[plane].l_h[1];
+
+        for (i = 0; i < lowpass_width; i++) {
+            // note the stride of "low" is highpass_stride
+            vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
+            low++;
+            high++;
+            output++;
+        }
+
+        low    = s->plane[plane].l_h[0];
+        high   = s->plane[plane].l_h[1];
+        output = s->plane[plane].subband[0];
+        for (i = 0; i < lowpass_height * 2; i++) {
+            horiz_filter(output, low, high, lowpass_width);
+            low    += lowpass_width;
+            high   += lowpass_width;
+            output += lowpass_width * 2;
+        }
+        if (avctx->pix_fmt == AV_PIX_FMT_GBRP12) {
+            output = s->plane[plane].subband[0];
+            for (i = 0; i < lowpass_height * 2; i++) {
+                for (j = 0; j < lowpass_width * 2; j++)
+                    output[j] <<= 2;
+
+                output += lowpass_width * 2;
+            }
+        }
+
+        /* level 2 */
+        lowpass_height  = s->plane[plane].band[1][1].height;
+        lowpass_width   = s->plane[plane].band[1][1].width;
+        highpass_stride = s->plane[plane].band[1][1].stride;
+
+        if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
+            !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
+            av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
+            ret = AVERROR(EINVAL);
+            goto end;
+        }
+
+        av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
+
+        low    = s->plane[plane].subband[0];
+        high   = s->plane[plane].subband[5];
+        output = s->plane[plane].l_h[3];
+        for (i = 0; i < lowpass_width; i++) {
+            vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
+            low++;
+            high++;
+            output++;
+        }
+
+        low    = s->plane[plane].subband[4];
+        high   = s->plane[plane].subband[6];
+        output = s->plane[plane].l_h[4];
+        for (i = 0; i < lowpass_width; i++) {
+            vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
+            low++;
+            high++;
+            output++;
+        }
+
+        low    = s->plane[plane].l_h[3];
+        high   = s->plane[plane].l_h[4];
+        output = s->plane[plane].subband[0];
+        for (i = 0; i < lowpass_height * 2; i++) {
+            horiz_filter(output, low, high, lowpass_width);
+            low    += lowpass_width;
+            high   += lowpass_width;
+            output += lowpass_width * 2;
+        }
+
+        output = s->plane[plane].subband[0];
+        for (i = 0; i < lowpass_height * 2; i++) {
+            for (j = 0; j < lowpass_width * 2; j++)
+                output[j] <<= 2;
+
+            output += lowpass_width * 2;
+        }
+
+        /* level 3 */
+        lowpass_height  = s->plane[plane].band[2][1].height;
+        lowpass_width   = s->plane[plane].band[2][1].width;
+        highpass_stride = s->plane[plane].band[2][1].stride;
+
+        if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
+            !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
+            av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
+            ret = AVERROR(EINVAL);
+            goto end;
+        }
+
+        av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
+
+        low    = s->plane[plane].subband[0];
+        high   = s->plane[plane].subband[8];
+        output = s->plane[plane].l_h[6];
+        for (i = 0; i < lowpass_width; i++) {
+            vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
+            low++;
+            high++;
+            output++;
+        }
+
+        low    = s->plane[plane].subband[7];
+        high   = s->plane[plane].subband[9];
+        output = s->plane[plane].l_h[7];
+        for (i = 0; i < lowpass_width; i++) {
+            vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
+            low++;
+            high++;
+            output++;
+        }
+
+        dst = (int16_t *)pic->data[act_plane];
+        low  = s->plane[plane].l_h[6];
+        high = s->plane[plane].l_h[7];
+        for (i = 0; i < lowpass_height * 2; i++) {
+            horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
+            low  += lowpass_width;
+            high += lowpass_width;
+            dst  += pic->linesize[act_plane] / 2;
+        }
+    }
+
+
+end:
+    if (ret < 0)
+        return ret;
+
+    *got_frame = 1;
+    return avpkt->size;
+}
+
+static av_cold int cfhd_close_decoder(AVCodecContext *avctx)
+{
+    CFHDContext *s = avctx->priv_data;
+
+    free_buffers(avctx);
+
+    if (!avctx->internal->is_copy) {
+        ff_free_vlc(&s->vlc_9);
+        ff_free_vlc(&s->vlc_18);
+    }
+
+    return 0;
+}
+
+AVCodec ff_cfhd_decoder = {
+    .name           = "cfhd",
+    .long_name      = NULL_IF_CONFIG_SMALL("Cineform HD"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_CFHD,
+    .priv_data_size = sizeof(CFHDContext),
+    .init           = cfhd_decode_init,
+    .close          = cfhd_close_decoder,
+    .decode         = cfhd_decode,
+    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
+};