GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/sgienc.c Lines: 81 142 57.0 %
Date: 2020-08-13 15:06:06 Branches: 31 66 47.0 %

Line Branch Exec Source
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/*
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 * SGI image encoder
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 * Todd Kirby <doubleshot@pacbell.net>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "sgi.h"
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#include "rle.h"
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#define SGI_SINGLE_CHAN 2
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#define SGI_MULTI_CHAN 3
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typedef struct SgiContext {
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    AVClass *class;
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    int rle;
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} SgiContext;
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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1
    if (avctx->width > 65535 || avctx->height > 65535) {
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        av_log(avctx, AV_LOG_ERROR,
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               "Unsupported resolution %dx%d.\n", avctx->width, avctx->height);
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        av_log(avctx, AV_LOG_ERROR, "SGI does not support resolutions above 65535x65535\n");
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        return AVERROR_INVALIDDATA;
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    }
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    return 0;
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}
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11232
static int sgi_rle_encode(PutByteContext *pbc, const uint8_t *src,
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                          int w, int bpp)
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{
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11232
    int val, count, x, start = bytestream2_tell_p(pbc);
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    void (*bytestream2_put)(PutByteContext *, unsigned int);
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11232
    if (bpp == 1)
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11232
        bytestream2_put = bytestream2_put_byte;
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    else
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        bytestream2_put = bytestream2_put_be16;
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97313
    for (x = 0; x < w; x += count) {
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        /* see if we can encode the next set of pixels with RLE */
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86081
        count = ff_rle_count_pixels(src, w - x, bpp, 1);
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86081
        if (count > 1) {
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34170
            if (bytestream2_get_bytes_left_p(pbc) < bpp * 2)
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                return AVERROR_INVALIDDATA;
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34170
            val = bpp == 1 ? *src : AV_RB16(src);
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34170
            bytestream2_put(pbc, count);
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34170
            bytestream2_put(pbc, val);
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        } else {
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            int i;
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            /* fall back on uncompressed */
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51911
            count = ff_rle_count_pixels(src, w - x, bpp, 0);
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51911
            if (bytestream2_get_bytes_left_p(pbc) < bpp * (count + 1))
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                return AVERROR_INVALIDDATA;
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51911
            bytestream2_put(pbc, count + 0x80);
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3834780
            for (i = 0; i < count; i++) {
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3782869
                val = bpp == 1 ? src[i] : AV_RB16(src + i * bpp);
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3782869
                bytestream2_put(pbc, val);
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            }
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        }
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86081
        src += count * bpp;
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    }
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11232
    return bytestream2_tell_p(pbc) - start;
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}
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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                        const AVFrame *frame, int *got_packet)
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{
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    SgiContext *s = avctx->priv_data;
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    const AVFrame * const p = frame;
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    PutByteContext pbc;
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    uint8_t *in_buf, *encode_buf;
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    int x, y, z, length, tablesize, ret, i;
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    unsigned int width, height, depth, dimension;
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    unsigned int bytes_per_channel, pixmax, put_be;
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#if FF_API_CODED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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    avctx->coded_frame->key_frame = 1;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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#if FF_API_CODER_TYPE
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FF_DISABLE_DEPRECATION_WARNINGS
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    if (avctx->coder_type == FF_CODER_TYPE_RAW)
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        s->rle = 0;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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    width  = avctx->width;
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    height = avctx->height;
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    bytes_per_channel = 1;
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    pixmax = 0xFF;
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    put_be = HAVE_BIGENDIAN;
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    switch (avctx->pix_fmt) {
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    case AV_PIX_FMT_GRAY8:
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        dimension = SGI_SINGLE_CHAN;
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        depth     = SGI_GRAYSCALE;
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        break;
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    case AV_PIX_FMT_RGB24:
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        dimension = SGI_MULTI_CHAN;
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        depth     = SGI_RGB;
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        break;
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    case AV_PIX_FMT_RGBA:
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        dimension = SGI_MULTI_CHAN;
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        depth     = SGI_RGBA;
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        break;
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    case AV_PIX_FMT_GRAY16LE:
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        put_be = !HAVE_BIGENDIAN;
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    case AV_PIX_FMT_GRAY16BE:
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        bytes_per_channel = 2;
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        pixmax = 0xFFFF;
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        dimension = SGI_SINGLE_CHAN;
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        depth     = SGI_GRAYSCALE;
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        break;
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    case AV_PIX_FMT_RGB48LE:
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        put_be = !HAVE_BIGENDIAN;
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    case AV_PIX_FMT_RGB48BE:
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        bytes_per_channel = 2;
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        pixmax = 0xFFFF;
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        dimension = SGI_MULTI_CHAN;
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        depth     = SGI_RGB;
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        break;
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    case AV_PIX_FMT_RGBA64LE:
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        put_be = !HAVE_BIGENDIAN;
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    case AV_PIX_FMT_RGBA64BE:
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        bytes_per_channel = 2;
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        pixmax = 0xFFFF;
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        dimension = SGI_MULTI_CHAN;
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        depth     = SGI_RGBA;
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        break;
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    default:
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        return AVERROR_INVALIDDATA;
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    }
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    tablesize = depth * height * 4;
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    length = SGI_HEADER_SIZE;
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    if (!s->rle)
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        length += depth * height * width;
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    else // assume sgi_rle_encode() produces at most 2x size of input
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        length += tablesize * 2 + depth * height * (2 * width + 1);
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    if ((ret = ff_alloc_packet2(avctx, pkt, bytes_per_channel * length, 0)) < 0)
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        return ret;
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    bytestream2_init_writer(&pbc, pkt->data, pkt->size);
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    /* Encode header. */
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    bytestream2_put_be16(&pbc, SGI_MAGIC);
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    bytestream2_put_byte(&pbc, s->rle); /* RLE 1 - VERBATIM 0 */
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    bytestream2_put_byte(&pbc, bytes_per_channel);
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    bytestream2_put_be16(&pbc, dimension);
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    bytestream2_put_be16(&pbc, width);
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    bytestream2_put_be16(&pbc, height);
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    bytestream2_put_be16(&pbc, depth);
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    bytestream2_put_be32(&pbc, 0L); /* pixmin */
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    bytestream2_put_be32(&pbc, pixmax);
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    bytestream2_put_be32(&pbc, 0L); /* dummy */
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    /* name */
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    for (i = 0; i < 80; i++)
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        bytestream2_put_byte(&pbc, 0L);
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    /* colormap */
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    bytestream2_put_be32(&pbc, 0L);
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    /* The rest of the 512 byte header is unused. */
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    for (i = 0; i < 404; i++)
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        bytestream2_put_byte(&pbc, 0L);
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    if (s->rle) {
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        PutByteContext taboff_pcb, tablen_pcb;
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        /* Skip RLE offset table. */
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        bytestream2_init_writer(&taboff_pcb, pbc.buffer, tablesize);
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        bytestream2_skip_p(&pbc, tablesize);
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        /* Skip RLE length table. */
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        bytestream2_init_writer(&tablen_pcb, pbc.buffer, tablesize);
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        bytestream2_skip_p(&pbc, tablesize);
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        /* Make an intermediate consecutive buffer. */
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        if (!(encode_buf = av_malloc(width * bytes_per_channel)))
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            return AVERROR(ENOMEM);
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        for (z = 0; z < depth; z++) {
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            in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
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            for (y = 0; y < height; y++) {
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11232
                bytestream2_put_be32(&taboff_pcb, bytestream2_tell_p(&pbc));
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                for (x = 0; x < width * bytes_per_channel; x += bytes_per_channel)
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3953664
                    if (bytes_per_channel == 1) {
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3953664
                        encode_buf[x]     = in_buf[depth * x];
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                    } else if (HAVE_BIGENDIAN ^ put_be) {
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                        encode_buf[x + 1] = in_buf[depth * x];
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                        encode_buf[x]     = in_buf[depth * x + 1];
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                    } else {
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                        encode_buf[x]     = in_buf[depth * x];
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                        encode_buf[x + 1] = in_buf[depth * x + 1];
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                    }
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11232
                length = sgi_rle_encode(&pbc, encode_buf, width,
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                                        bytes_per_channel);
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11232
                if (length < 1) {
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                    av_free(encode_buf);
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                    return AVERROR_INVALIDDATA;
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                }
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11232
                bytestream2_put_be32(&tablen_pcb, length);
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11232
                in_buf -= p->linesize[0];
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            }
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        }
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        av_free(encode_buf);
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    } else {
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        for (z = 0; z < depth; z++) {
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            in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
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            for (y = 0; y < height; y++) {
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                for (x = 0; x < width * depth; x += depth)
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                    if (bytes_per_channel == 1)
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                        bytestream2_put_byte(&pbc, in_buf[x]);
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                    else
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                        if (put_be)
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                            bytestream2_put_be16(&pbc, ((uint16_t *)in_buf)[x]);
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                        else
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                            bytestream2_put_le16(&pbc, ((uint16_t *)in_buf)[x]);
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                in_buf -= p->linesize[0];
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            }
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        }
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    }
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    /* total length */
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    pkt->size   = bytestream2_tell_p(&pbc);
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    pkt->flags |= AV_PKT_FLAG_KEY;
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    *got_packet = 1;
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    return 0;
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}
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#define OFFSET(x) offsetof(SgiContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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    { "rle", "Use run-length compression", OFFSET(rle), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
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    { NULL },
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};
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static const AVClass sgi_class = {
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    .class_name = "sgi",
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    .item_name  = av_default_item_name,
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    .option     = options,
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    .version    = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_sgi_encoder = {
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    .name      = "sgi",
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    .long_name = NULL_IF_CONFIG_SMALL("SGI image"),
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    .type      = AVMEDIA_TYPE_VIDEO,
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    .id        = AV_CODEC_ID_SGI,
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    .priv_data_size = sizeof(SgiContext),
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    .priv_class = &sgi_class,
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    .init      = encode_init,
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    .encode2   = encode_frame,
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    .pix_fmts  = (const enum AVPixelFormat[]) {
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        AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
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        AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
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        AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
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        AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY8,
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        AV_PIX_FMT_NONE
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    },
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};