huffyuv: split encoder and decoder into separate files.

1 files changed, 633 insertions, 0 deletions

diff --git a/libavcodec/huffyuvenc.c b/libavcodec/huffyuvenc.c
new file mode 100644
index 0000000000..13c0a79566
--- /dev/null
+++ b/libavcodec/huffyuvenc.c
@@ -0,0 +1,633 @@
+/*
+ * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
+ * the algorithm used
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * huffyuv encoder
+ */
+
+#include "avcodec.h"
+#include "huffyuv.h"
+#include "huffman.h"
+#include "put_bits.h"
+
+static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst,
+                                      uint8_t *src, int w, int left)
+{
+    int i;
+    if (w < 32) {
+        for (i = 0; i < w; i++) {
+            const int temp = src[i];
+            dst[i] = temp - left;
+            left   = temp;
+        }
+        return left;
+    } else {
+        for (i = 0; i < 16; i++) {
+            const int temp = src[i];
+            dst[i] = temp - left;
+            left   = temp;
+        }
+        s->dsp.diff_bytes(dst + 16, src + 16, src + 15, w - 16);
+        return src[w-1];
+    }
+}
+
+static inline void sub_left_prediction_bgr32(HYuvContext *s, uint8_t *dst,
+                                             uint8_t *src, int w,
+                                             int *red, int *green, int *blue)
+{
+    int i;
+    int r,g,b;
+    r = *red;
+    g = *green;
+    b = *blue;
+
+    for (i = 0; i < FFMIN(w, 4); i++) {
+        const int rt = src[i * 4 + R];
+        const int gt = src[i * 4 + G];
+        const int bt = src[i * 4 + B];
+        dst[i * 4 + R] = rt - r;
+        dst[i * 4 + G] = gt - g;
+        dst[i * 4 + B] = bt - b;
+        r = rt;
+        g = gt;
+        b = bt;
+    }
+
+    s->dsp.diff_bytes(dst + 16, src + 16, src + 12, w * 4 - 16);
+
+    *red   = src[(w - 1) * 4 + R];
+    *green = src[(w - 1) * 4 + G];
+    *blue  = src[(w - 1) * 4 + B];
+}
+
+static int store_table(HYuvContext *s, const uint8_t *len, uint8_t *buf)
+{
+    int i;
+    int index = 0;
+
+    for (i = 0; i < 256;) {
+        int val = len[i];
+        int repeat = 0;
+
+        for (; i < 256 && len[i] == val && repeat < 255; i++)
+            repeat++;
+
+        assert(val < 32 && val >0 && repeat<256 && repeat>0);
+        if ( repeat > 7) {
+            buf[index++] = val;
+            buf[index++] = repeat;
+        } else {
+            buf[index++] = val | (repeat << 5);
+        }
+    }
+
+    return index;
+}
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+    HYuvContext *s = avctx->priv_data;
+    int i, j;
+
+    ff_huffyuv_common_init(avctx);
+
+    avctx->extradata = av_mallocz(1024*30); // 256*3+4 == 772
+    avctx->stats_out = av_mallocz(1024*30); // 21*256*3(%llu ) + 3(\n) + 1(0) = 16132
+    s->version = 2;
+
+    avctx->coded_frame = &s->picture;
+
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_YUV420P:
+        s->bitstream_bpp = 12;
+        break;
+    case AV_PIX_FMT_YUV422P:
+        s->bitstream_bpp = 16;
+        break;
+    case AV_PIX_FMT_RGB32:
+        s->bitstream_bpp = 24;
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "format not supported\n");
+        return -1;
+    }
+    avctx->bits_per_coded_sample = s->bitstream_bpp;
+    s->decorrelate = s->bitstream_bpp >= 24;
+    s->predictor = avctx->prediction_method;
+    s->interlaced = avctx->flags&CODEC_FLAG_INTERLACED_ME ? 1 : 0;
+    if (avctx->context_model == 1) {
+        s->context = avctx->context_model;
+        if (s->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "context=1 is not compatible with "
+                   "2 pass huffyuv encoding\n");
+            return -1;
+        }
+    }else s->context= 0;
+
+    if (avctx->codec->id == AV_CODEC_ID_HUFFYUV) {
+        if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Error: YV12 is not supported by huffyuv; use "
+                   "vcodec=ffvhuff or format=422p\n");
+            return -1;
+        }
+        if (avctx->context_model) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Error: per-frame huffman tables are not supported "
+                   "by huffyuv; use vcodec=ffvhuff\n");
+            return -1;
+        }
+        if (s->interlaced != ( s->height > 288 ))
+            av_log(avctx, AV_LOG_INFO,
+                   "using huffyuv 2.2.0 or newer interlacing flag\n");
+    }
+
+    if (s->bitstream_bpp >= 24 && s->predictor == MEDIAN) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Error: RGB is incompatible with median predictor\n");
+        return -1;
+    }
+
+    ((uint8_t*)avctx->extradata)[0] = s->predictor | (s->decorrelate << 6);
+    ((uint8_t*)avctx->extradata)[1] = s->bitstream_bpp;
+    ((uint8_t*)avctx->extradata)[2] = s->interlaced ? 0x10 : 0x20;
+    if (s->context)
+        ((uint8_t*)avctx->extradata)[2] |= 0x40;
+    ((uint8_t*)avctx->extradata)[3] = 0;
+    s->avctx->extradata_size = 4;
+
+    if (avctx->stats_in) {
+        char *p = avctx->stats_in;
+
+        for (i = 0; i < 3; i++)
+            for (j = 0; j < 256; j++)
+                s->stats[i][j] = 1;
+
+        for (;;) {
+            for (i = 0; i < 3; i++) {
+                char *next;
+
+                for (j = 0; j < 256; j++) {
+                    s->stats[i][j] += strtol(p, &next, 0);
+                    if (next == p) return -1;
+                    p = next;
+                }
+            }
+            if (p[0] == 0 || p[1] == 0 || p[2] == 0) break;
+        }
+    } else {
+        for (i = 0; i < 3; i++)
+            for (j = 0; j < 256; j++) {
+                int d = FFMIN(j, 256 - j);
+
+                s->stats[i][j] = 100000000 / (d + 1);
+            }
+    }
+
+    for (i = 0; i < 3; i++) {
+        ff_huff_gen_len_table(s->len[i], s->stats[i]);
+
+        if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
+            return -1;
+        }
+
+        s->avctx->extradata_size +=
+            store_table(s, s->len[i], &((uint8_t*)s->avctx->extradata)[s->avctx->extradata_size]);
+    }
+
+    if (s->context) {
+        for (i = 0; i < 3; i++) {
+            int pels = s->width * s->height / (i ? 40 : 10);
+            for (j = 0; j < 256; j++) {
+                int d = FFMIN(j, 256 - j);
+                s->stats[i][j] = pels/(d + 1);
+            }
+        }
+    } else {
+        for (i = 0; i < 3; i++)
+            for (j = 0; j < 256; j++)
+                s->stats[i][j]= 0;
+    }
+
+    ff_huffyuv_alloc_temp(s);
+
+    s->picture_number=0;
+
+    return 0;
+}
+static int encode_422_bitstream(HYuvContext *s, int offset, int count)
+{
+    int i;
+    const uint8_t *y = s->temp[0] + offset;
+    const uint8_t *u = s->temp[1] + offset / 2;
+    const uint8_t *v = s->temp[2] + offset / 2;
+
+    if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 2 * 4 * count) {
+        av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+        return -1;
+    }
+
+#define LOAD4\
+            int y0 = y[2 * i];\
+            int y1 = y[2 * i + 1];\
+            int u0 = u[i];\
+            int v0 = v[i];
+
+    count /= 2;
+
+    if (s->flags & CODEC_FLAG_PASS1) {
+        for(i = 0; i < count; i++) {
+            LOAD4;
+            s->stats[0][y0]++;
+            s->stats[1][u0]++;
+            s->stats[0][y1]++;
+            s->stats[2][v0]++;
+        }
+    }
+    if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)
+        return 0;
+    if (s->context) {
+        for (i = 0; i < count; i++) {
+            LOAD4;
+            s->stats[0][y0]++;
+            put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
+            s->stats[1][u0]++;
+            put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
+            s->stats[0][y1]++;
+            put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
+            s->stats[2][v0]++;
+            put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
+        }
+    } else {
+        for(i = 0; i < count; i++) {
+            LOAD4;
+            put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
+            put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
+            put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
+            put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
+        }
+    }
+    return 0;
+}
+
+static int encode_gray_bitstream(HYuvContext *s, int count)
+{
+    int i;
+
+    if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 4 * count) {
+        av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+        return -1;
+    }
+
+#define LOAD2\
+            int y0 = s->temp[0][2 * i];\
+            int y1 = s->temp[0][2 * i + 1];
+#define STAT2\
+            s->stats[0][y0]++;\
+            s->stats[0][y1]++;
+#define WRITE2\
+            put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);\
+            put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
+
+    count /= 2;
+
+    if (s->flags & CODEC_FLAG_PASS1) {
+        for (i = 0; i < count; i++) {
+            LOAD2;
+            STAT2;
+        }
+    }
+    if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)
+        return 0;
+
+    if (s->context) {
+        for (i = 0; i < count; i++) {
+            LOAD2;
+            STAT2;
+            WRITE2;
+        }
+    } else {
+        for (i = 0; i < count; i++) {
+            LOAD2;
+            WRITE2;
+        }
+    }
+    return 0;
+}
+
+static int encode_bgr_bitstream(HYuvContext *s, int count)
+{
+    int i;
+
+    if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 3 * 4 * count) {
+        av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+        return -1;
+    }
+
+#define LOAD3\
+            int g =  s->temp[0][4 * i + G];\
+            int b = (s->temp[0][4 * i + B] - g) & 0xff;\
+            int r = (s->temp[0][4 * i + R] - g) & 0xff;
+#define STAT3\
+            s->stats[0][b]++;\
+            s->stats[1][g]++;\
+            s->stats[2][r]++;
+#define WRITE3\
+            put_bits(&s->pb, s->len[1][g], s->bits[1][g]);\
+            put_bits(&s->pb, s->len[0][b], s->bits[0][b]);\
+            put_bits(&s->pb, s->len[2][r], s->bits[2][r]);
+
+    if ((s->flags & CODEC_FLAG_PASS1) &&
+        (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
+        for (i = 0; i < count; i++) {
+            LOAD3;
+            STAT3;
+        }
+    } else if (s->context || (s->flags & CODEC_FLAG_PASS1)) {
+        for (i = 0; i < count; i++) {
+            LOAD3;
+            STAT3;
+            WRITE3;
+        }
+    } else {
+        for (i = 0; i < count; i++) {
+            LOAD3;
+            WRITE3;
+        }
+    }
+    return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                        const AVFrame *pict, int *got_packet)
+{
+    HYuvContext *s = avctx->priv_data;
+    const int width = s->width;
+    const int width2 = s->width>>1;
+    const int height = s->height;
+    const int fake_ystride = s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];
+    const int fake_ustride = s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];
+    const int fake_vstride = s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];
+    AVFrame * const p = &s->picture;
+    int i, j, size = 0, ret;
+
+    if (!pkt->data &&
+        (ret = av_new_packet(pkt, width * height * 3 * 4 + FF_MIN_BUFFER_SIZE)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
+        return ret;
+    }
+
+    *p = *pict;
+    p->pict_type = AV_PICTURE_TYPE_I;
+    p->key_frame = 1;
+
+    if (s->context) {
+        for (i = 0; i < 3; i++) {
+            ff_huff_gen_len_table(s->len[i], s->stats[i]);
+            if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0)
+                return -1;
+            size += store_table(s, s->len[i], &pkt->data[size]);
+        }
+
+        for (i = 0; i < 3; i++)
+            for (j = 0; j < 256; j++)
+                s->stats[i][j] >>= 1;
+    }
+
+    init_put_bits(&s->pb, pkt->data + size, pkt->size - size);
+
+    if (avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
+        avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
+        int lefty, leftu, leftv, y, cy;
+
+        put_bits(&s->pb, 8, leftv = p->data[2][0]);
+        put_bits(&s->pb, 8, lefty = p->data[0][1]);
+        put_bits(&s->pb, 8, leftu = p->data[1][0]);
+        put_bits(&s->pb, 8,         p->data[0][0]);
+
+        lefty = sub_left_prediction(s, s->temp[0], p->data[0], width , 0);
+        leftu = sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);
+        leftv = sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);
+
+        encode_422_bitstream(s, 2, width-2);
+
+        if (s->predictor==MEDIAN) {
+            int lefttopy, lefttopu, lefttopv;
+            cy = y = 1;
+            if (s->interlaced) {
+                lefty = sub_left_prediction(s, s->temp[0], p->data[0] + p->linesize[0], width , lefty);
+                leftu = sub_left_prediction(s, s->temp[1], p->data[1] + p->linesize[1], width2, leftu);
+                leftv = sub_left_prediction(s, s->temp[2], p->data[2] + p->linesize[2], width2, leftv);
+
+                encode_422_bitstream(s, 0, width);
+                y++; cy++;
+            }
+
+            lefty = sub_left_prediction(s, s->temp[0], p->data[0] + fake_ystride, 4, lefty);
+            leftu = sub_left_prediction(s, s->temp[1], p->data[1] + fake_ustride, 2, leftu);
+            leftv = sub_left_prediction(s, s->temp[2], p->data[2] + fake_vstride, 2, leftv);
+
+            encode_422_bitstream(s, 0, 4);
+
+            lefttopy = p->data[0][3];
+            lefttopu = p->data[1][1];
+            lefttopv = p->data[2][1];
+            s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride + 4, width - 4 , &lefty, &lefttopy);
+            s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride + 2, width2 - 2, &leftu, &lefttopu);
+            s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride + 2, width2 - 2, &leftv, &lefttopv);
+            encode_422_bitstream(s, 0, width - 4);
+            y++; cy++;
+
+            for (; y < height; y++,cy++) {
+                uint8_t *ydst, *udst, *vdst;
+
+                if (s->bitstream_bpp == 12) {
+                    while (2 * cy > y) {
+                        ydst = p->data[0] + p->linesize[0] * y;
+                        s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
+                        encode_gray_bitstream(s, width);
+                        y++;
+                    }
+                    if (y >= height) break;
+                }
+                ydst = p->data[0] + p->linesize[0] * y;
+                udst = p->data[1] + p->linesize[1] * cy;
+                vdst = p->data[2] + p->linesize[2] * cy;
+
+                s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
+                s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);
+                s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);
+
+                encode_422_bitstream(s, 0, width);
+            }
+        } else {
+            for (cy = y = 1; y < height; y++, cy++) {
+                uint8_t *ydst, *udst, *vdst;
+
+                /* encode a luma only line & y++ */
+                if (s->bitstream_bpp == 12) {
+                    ydst = p->data[0] + p->linesize[0] * y;
+
+                    if (s->predictor == PLANE && s->interlaced < y) {
+                        s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
+
+                        lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
+                    } else {
+                        lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
+                    }
+                    encode_gray_bitstream(s, width);
+                    y++;
+                    if (y >= height) break;
+                }
+
+                ydst = p->data[0] + p->linesize[0] * y;
+                udst = p->data[1] + p->linesize[1] * cy;
+                vdst = p->data[2] + p->linesize[2] * cy;
+
+                if (s->predictor == PLANE && s->interlaced < cy) {
+                    s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
+                    s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);
+                    s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);
+
+                    lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
+                    leftu = sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);
+                    leftv = sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);
+                } else {
+                    lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
+                    leftu = sub_left_prediction(s, s->temp[1], udst, width2, leftu);
+                    leftv = sub_left_prediction(s, s->temp[2], vdst, width2, leftv);
+                }
+
+                encode_422_bitstream(s, 0, width);
+            }
+        }
+    } else if(avctx->pix_fmt == AV_PIX_FMT_RGB32) {
+        uint8_t *data = p->data[0] + (height - 1) * p->linesize[0];
+        const int stride = -p->linesize[0];
+        const int fake_stride = -fake_ystride;
+        int y;
+        int leftr, leftg, leftb;
+
+        put_bits(&s->pb, 8, leftr = data[R]);
+        put_bits(&s->pb, 8, leftg = data[G]);
+        put_bits(&s->pb, 8, leftb = data[B]);
+        put_bits(&s->pb, 8, 0);
+
+        sub_left_prediction_bgr32(s, s->temp[0], data + 4, width - 1, &leftr, &leftg, &leftb);
+        encode_bgr_bitstream(s, width - 1);
+
+        for (y = 1; y < s->height; y++) {
+            uint8_t *dst = data + y*stride;
+            if (s->predictor == PLANE && s->interlaced < y) {
+                s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width * 4);
+                sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);
+            } else {
+                sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);
+            }
+            encode_bgr_bitstream(s, width);
+        }
+    } else {
+        av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
+    }
+    emms_c();
+
+    size += (put_bits_count(&s->pb) + 31) / 8;
+    put_bits(&s->pb, 16, 0);
+    put_bits(&s->pb, 15, 0);
+    size /= 4;
+
+    if ((s->flags&CODEC_FLAG_PASS1) && (s->picture_number & 31) == 0) {
+        int j;
+        char *p = avctx->stats_out;
+        char *end = p + 1024*30;
+        for (i = 0; i < 3; i++) {
+            for (j = 0; j < 256; j++) {
+                snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);
+                p += strlen(p);
+                s->stats[i][j]= 0;
+            }
+            snprintf(p, end-p, "\n");
+            p++;
+        }
+    } else
+        avctx->stats_out[0] = '\0';
+    if (!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
+        flush_put_bits(&s->pb);
+        s->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
+    }
+
+    s->picture_number++;
+
+    pkt->size   = size * 4;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+
+    return 0;
+}
+
+static av_cold int encode_end(AVCodecContext *avctx)
+{
+    HYuvContext *s = avctx->priv_data;
+
+    ff_huffyuv_common_end(s);
+
+    av_freep(&avctx->extradata);
+    av_freep(&avctx->stats_out);
+
+    return 0;
+}
+
+#if CONFIG_HUFFYUV_ENCODER
+AVCodec ff_huffyuv_encoder = {
+    .name           = "huffyuv",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_HUFFYUV,
+    .priv_data_size = sizeof(HYuvContext),
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .close          = encode_end,
+    .pix_fmts       = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
+    },
+    .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
+};
+#endif
+
+#if CONFIG_FFVHUFF_ENCODER
+AVCodec ff_ffvhuff_encoder = {
+    .name           = "ffvhuff",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_FFVHUFF,
+    .priv_data_size = sizeof(HYuvContext),
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .close          = encode_end,
+    .pix_fmts       = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
+    },
+    .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
+};
+#endif