chasing indexing error

1 files changed, 0 insertions, 744 deletions

diff --git a/ffmpeg/libavcodec/lagarith.c b/ffmpeg/libavcodec/lagarith.c
deleted file mode 100644
index 0a4d23e..0000000
--- a/ffmpeg/libavcodec/lagarith.c
+++ /dev/null
@@ -1,744 +0,0 @@
-/*
- * Lagarith lossless decoder
- * Copyright (c) 2009 Nathan Caldwell <saintdev (at) gmail.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
- * Lagarith lossless decoder
- * @author Nathan Caldwell
- */
-
-#include "avcodec.h"
-#include "get_bits.h"
-#include "mathops.h"
-#include "dsputil.h"
-#include "lagarithrac.h"
-#include "thread.h"
-
-enum LagarithFrameType {
-    FRAME_RAW           = 1,    /**< uncompressed */
-    FRAME_U_RGB24       = 2,    /**< unaligned RGB24 */
-    FRAME_ARITH_YUY2    = 3,    /**< arithmetic coded YUY2 */
-    FRAME_ARITH_RGB24   = 4,    /**< arithmetic coded RGB24 */
-    FRAME_SOLID_GRAY    = 5,    /**< solid grayscale color frame */
-    FRAME_SOLID_COLOR   = 6,    /**< solid non-grayscale color frame */
-    FRAME_OLD_ARITH_RGB = 7,    /**< obsolete arithmetic coded RGB (no longer encoded by upstream since version 1.1.0) */
-    FRAME_ARITH_RGBA    = 8,    /**< arithmetic coded RGBA */
-    FRAME_SOLID_RGBA    = 9,    /**< solid RGBA color frame */
-    FRAME_ARITH_YV12    = 10,   /**< arithmetic coded YV12 */
-    FRAME_REDUCED_RES   = 11,   /**< reduced resolution YV12 frame */
-};
-
-typedef struct LagarithContext {
-    AVCodecContext *avctx;
-    DSPContext dsp;
-    int zeros;                  /**< number of consecutive zero bytes encountered */
-    int zeros_rem;              /**< number of zero bytes remaining to output */
-    uint8_t *rgb_planes;
-    int rgb_stride;
-} LagarithContext;
-
-/**
- * Compute the 52bit mantissa of 1/(double)denom.
- * This crazy format uses floats in an entropy coder and we have to match x86
- * rounding exactly, thus ordinary floats aren't portable enough.
- * @param denom denominator
- * @return 52bit mantissa
- * @see softfloat_mul
- */
-static uint64_t softfloat_reciprocal(uint32_t denom)
-{
-    int shift = av_log2(denom - 1) + 1;
-    uint64_t ret = (1ULL << 52) / denom;
-    uint64_t err = (1ULL << 52) - ret * denom;
-    ret <<= shift;
-    err <<= shift;
-    err +=  denom / 2;
-    return ret + err / denom;
-}
-
-/**
- * (uint32_t)(x*f), where f has the given mantissa, and exponent 0
- * Used in combination with softfloat_reciprocal computes x/(double)denom.
- * @param x 32bit integer factor
- * @param mantissa mantissa of f with exponent 0
- * @return 32bit integer value (x*f)
- * @see softfloat_reciprocal
- */
-static uint32_t softfloat_mul(uint32_t x, uint64_t mantissa)
-{
-    uint64_t l = x * (mantissa & 0xffffffff);
-    uint64_t h = x * (mantissa >> 32);
-    h += l >> 32;
-    l &= 0xffffffff;
-    l += 1 << av_log2(h >> 21);
-    h += l >> 32;
-    return h >> 20;
-}
-
-static uint8_t lag_calc_zero_run(int8_t x)
-{
-    return (x << 1) ^ (x >> 7);
-}
-
-static int lag_decode_prob(GetBitContext *gb, uint32_t *value)
-{
-    static const uint8_t series[] = { 1, 2, 3, 5, 8, 13, 21 };
-    int i;
-    int bit     = 0;
-    int bits    = 0;
-    int prevbit = 0;
-    unsigned val;
-
-    for (i = 0; i < 7; i++) {
-        if (prevbit && bit)
-            break;
-        prevbit = bit;
-        bit = get_bits1(gb);
-        if (bit && !prevbit)
-            bits += series[i];
-    }
-    bits--;
-    if (bits < 0 || bits > 31) {
-        *value = 0;
-        return -1;
-    } else if (bits == 0) {
-        *value = 0;
-        return 0;
-    }
-
-    val  = get_bits_long(gb, bits);
-    val |= 1 << bits;
-
-    *value = val - 1;
-
-    return 0;
-}
-
-static int lag_read_prob_header(lag_rac *rac, GetBitContext *gb)
-{
-    int i, j, scale_factor;
-    unsigned prob, cumulative_target;
-    unsigned cumul_prob = 0;
-    unsigned scaled_cumul_prob = 0;
-
-    rac->prob[0] = 0;
-    rac->prob[257] = UINT_MAX;
-    /* Read probabilities from bitstream */
-    for (i = 1; i < 257; i++) {
-        if (lag_decode_prob(gb, &rac->prob[i]) < 0) {
-            av_log(rac->avctx, AV_LOG_ERROR, "Invalid probability encountered.\n");
-            return -1;
-        }
-        if ((uint64_t)cumul_prob + rac->prob[i] > UINT_MAX) {
-            av_log(rac->avctx, AV_LOG_ERROR, "Integer overflow encountered in cumulative probability calculation.\n");
-            return -1;
-        }
-        cumul_prob += rac->prob[i];
-        if (!rac->prob[i]) {
-            if (lag_decode_prob(gb, &prob)) {
-                av_log(rac->avctx, AV_LOG_ERROR, "Invalid probability run encountered.\n");
-                return -1;
-            }
-            if (prob > 256 - i)
-                prob = 256 - i;
-            for (j = 0; j < prob; j++)
-                rac->prob[++i] = 0;
-        }
-    }
-
-    if (!cumul_prob) {
-        av_log(rac->avctx, AV_LOG_ERROR, "All probabilities are 0!\n");
-        return -1;
-    }
-
-    /* Scale probabilities so cumulative probability is an even power of 2. */
-    scale_factor = av_log2(cumul_prob);
-
-    if (cumul_prob & (cumul_prob - 1)) {
-        uint64_t mul = softfloat_reciprocal(cumul_prob);
-        for (i = 1; i <= 128; i++) {
-            rac->prob[i] = softfloat_mul(rac->prob[i], mul);
-            scaled_cumul_prob += rac->prob[i];
-        }
-        if (scaled_cumul_prob <= 0) {
-            av_log(rac->avctx, AV_LOG_ERROR, "Scaled probabilities invalid\n");
-            return AVERROR_INVALIDDATA;
-        }
-        for (; i < 257; i++) {
-            rac->prob[i] = softfloat_mul(rac->prob[i], mul);
-            scaled_cumul_prob += rac->prob[i];
-        }
-
-        scale_factor++;
-        cumulative_target = 1 << scale_factor;
-
-        if (scaled_cumul_prob > cumulative_target) {
-            av_log(rac->avctx, AV_LOG_ERROR,
-                   "Scaled probabilities are larger than target!\n");
-            return -1;
-        }
-
-        scaled_cumul_prob = cumulative_target - scaled_cumul_prob;
-
-        for (i = 1; scaled_cumul_prob; i = (i & 0x7f) + 1) {
-            if (rac->prob[i]) {
-                rac->prob[i]++;
-                scaled_cumul_prob--;
-            }
-            /* Comment from reference source:
-             * if (b & 0x80 == 0) {     // order of operations is 'wrong'; it has been left this way
-             *                          // since the compression change is negligible and fixing it
-             *                          // breaks backwards compatibility
-             *      b =- (signed int)b;
-             *      b &= 0xFF;
-             * } else {
-             *      b++;
-             *      b &= 0x7f;
-             * }
-             */
-        }
-    }
-
-    rac->scale = scale_factor;
-
-    /* Fill probability array with cumulative probability for each symbol. */
-    for (i = 1; i < 257; i++)
-        rac->prob[i] += rac->prob[i - 1];
-
-    return 0;
-}
-
-static void add_lag_median_prediction(uint8_t *dst, uint8_t *src1,
-                                      uint8_t *diff, int w, int *left,
-                                      int *left_top)
-{
-    /* This is almost identical to add_hfyu_median_prediction in dsputil.h.
-     * However the &0xFF on the gradient predictor yealds incorrect output
-     * for lagarith.
-     */
-    int i;
-    uint8_t l, lt;
-
-    l  = *left;
-    lt = *left_top;
-
-    for (i = 0; i < w; i++) {
-        l = mid_pred(l, src1[i], l + src1[i] - lt) + diff[i];
-        lt = src1[i];
-        dst[i] = l;
-    }
-
-    *left     = l;
-    *left_top = lt;
-}
-
-static void lag_pred_line(LagarithContext *l, uint8_t *buf,
-                          int width, int stride, int line)
-{
-    int L, TL;
-
-    if (!line) {
-        /* Left prediction only for first line */
-        L = l->dsp.add_hfyu_left_prediction(buf, buf,
-                                            width, 0);
-    } else {
-        /* Left pixel is actually prev_row[width] */
-        L = buf[width - stride - 1];
-
-        if (line == 1) {
-            /* Second line, left predict first pixel, the rest of the line is median predicted
-             * NOTE: In the case of RGB this pixel is top predicted */
-            TL = l->avctx->pix_fmt == AV_PIX_FMT_YUV420P ? buf[-stride] : L;
-        } else {
-            /* Top left is 2 rows back, last pixel */
-            TL = buf[width - (2 * stride) - 1];
-        }
-
-        add_lag_median_prediction(buf, buf - stride, buf,
-                                  width, &L, &TL);
-    }
-}
-
-static void lag_pred_line_yuy2(LagarithContext *l, uint8_t *buf,
-                               int width, int stride, int line,
-                               int is_luma)
-{
-    int L, TL;
-
-    if (!line) {
-        L= buf[0];
-        if (is_luma)
-            buf[0] = 0;
-        l->dsp.add_hfyu_left_prediction(buf, buf, width, 0);
-        if (is_luma)
-            buf[0] = L;
-        return;
-    }
-    if (line == 1) {
-        const int HEAD = is_luma ? 4 : 2;
-        int i;
-
-        L  = buf[width - stride - 1];
-        TL = buf[HEAD  - stride - 1];
-        for (i = 0; i < HEAD; i++) {
-            L += buf[i];
-            buf[i] = L;
-        }
-        for (; i<width; i++) {
-            L     = mid_pred(L&0xFF, buf[i-stride], (L + buf[i-stride] - TL)&0xFF) + buf[i];
-            TL    = buf[i-stride];
-            buf[i]= L;
-        }
-    } else {
-        TL = buf[width - (2 * stride) - 1];
-        L  = buf[width - stride - 1];
-        l->dsp.add_hfyu_median_prediction(buf, buf - stride, buf, width,
-                                        &L, &TL);
-    }
-}
-
-static int lag_decode_line(LagarithContext *l, lag_rac *rac,
-                           uint8_t *dst, int width, int stride,
-                           int esc_count)
-{
-    int i = 0;
-    int ret = 0;
-
-    if (!esc_count)
-        esc_count = -1;
-
-    /* Output any zeros remaining from the previous run */
-handle_zeros:
-    if (l->zeros_rem) {
-        int count = FFMIN(l->zeros_rem, width - i);
-        memset(dst + i, 0, count);
-        i += count;
-        l->zeros_rem -= count;
-    }
-
-    while (i < width) {
-        dst[i] = lag_get_rac(rac);
-        ret++;
-
-        if (dst[i])
-            l->zeros = 0;
-        else
-            l->zeros++;
-
-        i++;
-        if (l->zeros == esc_count) {
-            int index = lag_get_rac(rac);
-            ret++;
-
-            l->zeros = 0;
-
-            l->zeros_rem = lag_calc_zero_run(index);
-            goto handle_zeros;
-        }
-    }
-    return ret;
-}
-
-static int lag_decode_zero_run_line(LagarithContext *l, uint8_t *dst,
-                                    const uint8_t *src, const uint8_t *src_end,
-                                    int width, int esc_count)
-{
-    int i = 0;
-    int count;
-    uint8_t zero_run = 0;
-    const uint8_t *src_start = src;
-    uint8_t mask1 = -(esc_count < 2);
-    uint8_t mask2 = -(esc_count < 3);
-    uint8_t *end = dst + (width - 2);
-
-output_zeros:
-    if (l->zeros_rem) {
-        count = FFMIN(l->zeros_rem, width - i);
-        if (end - dst < count) {
-            av_log(l->avctx, AV_LOG_ERROR, "Too many zeros remaining.\n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        memset(dst, 0, count);
-        l->zeros_rem -= count;
-        dst += count;
-    }
-
-    while (dst < end) {
-        i = 0;
-        while (!zero_run && dst + i < end) {
-            i++;
-            if (i+2 >= src_end - src)
-                return AVERROR_INVALIDDATA;
-            zero_run =
-                !(src[i] | (src[i + 1] & mask1) | (src[i + 2] & mask2));
-        }
-        if (zero_run) {
-            zero_run = 0;
-            i += esc_count;
-            memcpy(dst, src, i);
-            dst += i;
-            l->zeros_rem = lag_calc_zero_run(src[i]);
-
-            src += i + 1;
-            goto output_zeros;
-        } else {
-            memcpy(dst, src, i);
-            src += i;
-            dst += i;
-        }
-    }
-    return  src - src_start;
-}
-
-
-
-static int lag_decode_arith_plane(LagarithContext *l, uint8_t *dst,
-                                  int width, int height, int stride,
-                                  const uint8_t *src, int src_size)
-{
-    int i = 0;
-    int read = 0;
-    uint32_t length;
-    uint32_t offset = 1;
-    int esc_count;
-    GetBitContext gb;
-    lag_rac rac;
-    const uint8_t *src_end = src + src_size;
-
-    rac.avctx = l->avctx;
-    l->zeros = 0;
-
-    if(src_size < 2)
-        return AVERROR_INVALIDDATA;
-
-    esc_count = src[0];
-    if (esc_count < 4) {
-        length = width * height;
-        if(src_size < 5)
-            return AVERROR_INVALIDDATA;
-        if (esc_count && AV_RL32(src + 1) < length) {
-            length = AV_RL32(src + 1);
-            offset += 4;
-        }
-
-        init_get_bits(&gb, src + offset, src_size * 8);
-
-        if (lag_read_prob_header(&rac, &gb) < 0)
-            return -1;
-
-        ff_lag_rac_init(&rac, &gb, length - stride);
-
-        for (i = 0; i < height; i++)
-            read += lag_decode_line(l, &rac, dst + (i * stride), width,
-                                    stride, esc_count);
-
-        if (read > length)
-            av_log(l->avctx, AV_LOG_WARNING,
-                   "Output more bytes than length (%d of %d)\n", read,
-                   length);
-    } else if (esc_count < 8) {
-        esc_count -= 4;
-        if (esc_count > 0) {
-            /* Zero run coding only, no range coding. */
-            for (i = 0; i < height; i++) {
-                int res = lag_decode_zero_run_line(l, dst + (i * stride), src,
-                                                   src_end, width, esc_count);
-                if (res < 0)
-                    return res;
-                src += res;
-            }
-        } else {
-            if (src_size < width * height)
-                return AVERROR_INVALIDDATA; // buffer not big enough
-            /* Plane is stored uncompressed */
-            for (i = 0; i < height; i++) {
-                memcpy(dst + (i * stride), src, width);
-                src += width;
-            }
-        }
-    } else if (esc_count == 0xff) {
-        /* Plane is a solid run of given value */
-        for (i = 0; i < height; i++)
-            memset(dst + i * stride, src[1], width);
-        /* Do not apply prediction.
-           Note: memset to 0 above, setting first value to src[1]
-           and applying prediction gives the same result. */
-        return 0;
-    } else {
-        av_log(l->avctx, AV_LOG_ERROR,
-               "Invalid zero run escape code! (%#x)\n", esc_count);
-        return -1;
-    }
-
-    if (l->avctx->pix_fmt != AV_PIX_FMT_YUV422P) {
-        for (i = 0; i < height; i++) {
-            lag_pred_line(l, dst, width, stride, i);
-            dst += stride;
-        }
-    } else {
-        for (i = 0; i < height; i++) {
-            lag_pred_line_yuy2(l, dst, width, stride, i,
-                               width == l->avctx->width);
-            dst += stride;
-        }
-    }
-
-    return 0;
-}
-
-/**
- * Decode a frame.
- * @param avctx codec context
- * @param data output AVFrame
- * @param data_size size of output data or 0 if no picture is returned
- * @param avpkt input packet
- * @return number of consumed bytes on success or negative if decode fails
- */
-static int lag_decode_frame(AVCodecContext *avctx,
-                            void *data, int *got_frame, AVPacket *avpkt)
-{
-    const uint8_t *buf = avpkt->data;
-    unsigned int buf_size = avpkt->size;
-    LagarithContext *l = avctx->priv_data;
-    ThreadFrame frame = { .f = data };
-    AVFrame *const p  = data;
-    uint8_t frametype = 0;
-    uint32_t offset_gu = 0, offset_bv = 0, offset_ry = 9;
-    uint32_t offs[4];
-    uint8_t *srcs[4], *dst;
-    int i, j, planes = 3;
-    int ret;
-
-    p->key_frame = 1;
-
-    frametype = buf[0];
-
-    offset_gu = AV_RL32(buf + 1);
-    offset_bv = AV_RL32(buf + 5);
-
-    switch (frametype) {
-    case FRAME_SOLID_RGBA:
-        avctx->pix_fmt = AV_PIX_FMT_RGB32;
-    case FRAME_SOLID_GRAY:
-        if (frametype == FRAME_SOLID_GRAY)
-            if (avctx->bits_per_coded_sample == 24) {
-                avctx->pix_fmt = AV_PIX_FMT_RGB24;
-            } else {
-                avctx->pix_fmt = AV_PIX_FMT_0RGB32;
-                planes = 4;
-            }
-
-        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
-            return ret;
-
-        dst = p->data[0];
-        if (frametype == FRAME_SOLID_RGBA) {
-        for (j = 0; j < avctx->height; j++) {
-            for (i = 0; i < avctx->width; i++)
-                AV_WN32(dst + i * 4, offset_gu);
-            dst += p->linesize[0];
-        }
-        } else {
-            for (j = 0; j < avctx->height; j++) {
-                memset(dst, buf[1], avctx->width * planes);
-                dst += p->linesize[0];
-            }
-        }
-        break;
-    case FRAME_SOLID_COLOR:
-        if (avctx->bits_per_coded_sample == 24) {
-            avctx->pix_fmt = AV_PIX_FMT_RGB24;
-        } else {
-            avctx->pix_fmt = AV_PIX_FMT_RGB32;
-            offset_gu |= 0xFFU << 24;
-        }
-
-        if ((ret = ff_thread_get_buffer(avctx, &frame,0)) < 0)
-            return ret;
-
-        dst = p->data[0];
-        for (j = 0; j < avctx->height; j++) {
-            for (i = 0; i < avctx->width; i++)
-                if (avctx->bits_per_coded_sample == 24) {
-                    AV_WB24(dst + i * 3, offset_gu);
-                } else {
-                    AV_WN32(dst + i * 4, offset_gu);
-                }
-            dst += p->linesize[0];
-        }
-        break;
-    case FRAME_ARITH_RGBA:
-        avctx->pix_fmt = AV_PIX_FMT_RGB32;
-        planes = 4;
-        offset_ry += 4;
-        offs[3] = AV_RL32(buf + 9);
-    case FRAME_ARITH_RGB24:
-    case FRAME_U_RGB24:
-        if (frametype == FRAME_ARITH_RGB24 || frametype == FRAME_U_RGB24)
-            avctx->pix_fmt = AV_PIX_FMT_RGB24;
-
-        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
-            return ret;
-
-        offs[0] = offset_bv;
-        offs[1] = offset_gu;
-        offs[2] = offset_ry;
-
-        if (!l->rgb_planes) {
-            l->rgb_stride = FFALIGN(avctx->width, 16);
-            l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * 4 + 16);
-            if (!l->rgb_planes) {
-                av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
-                return AVERROR(ENOMEM);
-            }
-        }
-        for (i = 0; i < planes; i++)
-            srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
-        for (i = 0; i < planes; i++)
-            if (buf_size <= offs[i]) {
-                av_log(avctx, AV_LOG_ERROR,
-                        "Invalid frame offsets\n");
-                return AVERROR_INVALIDDATA;
-            }
-
-        for (i = 0; i < planes; i++)
-            lag_decode_arith_plane(l, srcs[i],
-                                   avctx->width, avctx->height,
-                                   -l->rgb_stride, buf + offs[i],
-                                   buf_size - offs[i]);
-        dst = p->data[0];
-        for (i = 0; i < planes; i++)
-            srcs[i] = l->rgb_planes + i * l->rgb_stride * avctx->height;
-        for (j = 0; j < avctx->height; j++) {
-            for (i = 0; i < avctx->width; i++) {
-                uint8_t r, g, b, a;
-                r = srcs[0][i];
-                g = srcs[1][i];
-                b = srcs[2][i];
-                r += g;
-                b += g;
-                if (frametype == FRAME_ARITH_RGBA) {
-                    a = srcs[3][i];
-                    AV_WN32(dst + i * 4, MKBETAG(a, r, g, b));
-                } else {
-                    dst[i * 3 + 0] = r;
-                    dst[i * 3 + 1] = g;
-                    dst[i * 3 + 2] = b;
-                }
-            }
-            dst += p->linesize[0];
-            for (i = 0; i < planes; i++)
-                srcs[i] += l->rgb_stride;
-        }
-        break;
-    case FRAME_ARITH_YUY2:
-        avctx->pix_fmt = AV_PIX_FMT_YUV422P;
-
-        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
-            return ret;
-
-        if (offset_ry >= buf_size ||
-            offset_gu >= buf_size ||
-            offset_bv >= buf_size) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Invalid frame offsets\n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        lag_decode_arith_plane(l, p->data[0], avctx->width, avctx->height,
-                               p->linesize[0], buf + offset_ry,
-                               buf_size - offset_ry);
-        lag_decode_arith_plane(l, p->data[1], avctx->width / 2,
-                               avctx->height, p->linesize[1],
-                               buf + offset_gu, buf_size - offset_gu);
-        lag_decode_arith_plane(l, p->data[2], avctx->width / 2,
-                               avctx->height, p->linesize[2],
-                               buf + offset_bv, buf_size - offset_bv);
-        break;
-    case FRAME_ARITH_YV12:
-        avctx->pix_fmt = AV_PIX_FMT_YUV420P;
-
-        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
-            return ret;
-        if (buf_size <= offset_ry || buf_size <= offset_gu || buf_size <= offset_bv) {
-            return AVERROR_INVALIDDATA;
-        }
-
-        if (offset_ry >= buf_size ||
-            offset_gu >= buf_size ||
-            offset_bv >= buf_size) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Invalid frame offsets\n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        lag_decode_arith_plane(l, p->data[0], avctx->width, avctx->height,
-                               p->linesize[0], buf + offset_ry,
-                               buf_size - offset_ry);
-        lag_decode_arith_plane(l, p->data[2], avctx->width / 2,
-                               avctx->height / 2, p->linesize[2],
-                               buf + offset_gu, buf_size - offset_gu);
-        lag_decode_arith_plane(l, p->data[1], avctx->width / 2,
-                               avctx->height / 2, p->linesize[1],
-                               buf + offset_bv, buf_size - offset_bv);
-        break;
-    default:
-        av_log(avctx, AV_LOG_ERROR,
-               "Unsupported Lagarith frame type: %#x\n", frametype);
-        return AVERROR_PATCHWELCOME;
-    }
-
-    *got_frame = 1;
-
-    return buf_size;
-}
-
-static av_cold int lag_decode_init(AVCodecContext *avctx)
-{
-    LagarithContext *l = avctx->priv_data;
-    l->avctx = avctx;
-
-    ff_dsputil_init(&l->dsp, avctx);
-
-    return 0;
-}
-
-static av_cold int lag_decode_end(AVCodecContext *avctx)
-{
-    LagarithContext *l = avctx->priv_data;
-
-    av_freep(&l->rgb_planes);
-
-    return 0;
-}
-
-AVCodec ff_lagarith_decoder = {
-    .name           = "lagarith",
-    .long_name      = NULL_IF_CONFIG_SMALL("Lagarith lossless"),
-    .type           = AVMEDIA_TYPE_VIDEO,
-    .id             = AV_CODEC_ID_LAGARITH,
-    .priv_data_size = sizeof(LagarithContext),
-    .init           = lag_decode_init,
-    .close          = lag_decode_end,
-    .decode         = lag_decode_frame,
-    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
-};