GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/aasc.c Lines: 35 74 47.3 %
Date: 2019-11-22 03:34:36 Branches: 8 26 30.8 %

Line Branch Exec Source
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/*
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 * Autodesk RLE Decoder
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 * Copyright (C) 2005 The FFmpeg project
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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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/**
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 * @file
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 * Autodesk RLE Video Decoder by Konstantin Shishkov
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "avcodec.h"
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#include "internal.h"
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#include "msrledec.h"
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typedef struct AascContext {
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    AVCodecContext *avctx;
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    GetByteContext gb;
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    AVFrame *frame;
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    uint32_t palette[AVPALETTE_COUNT];
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    int palette_size;
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} AascContext;
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static av_cold int aasc_decode_init(AVCodecContext *avctx)
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{
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    AascContext *s = avctx->priv_data;
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    uint8_t *ptr;
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    int i;
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    s->avctx = avctx;
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    switch (avctx->bits_per_coded_sample) {
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    case 8:
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        avctx->pix_fmt = AV_PIX_FMT_PAL8;
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        ptr = avctx->extradata;
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        s->palette_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
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        for (i = 0; i < s->palette_size / 4; i++) {
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            s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
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            ptr += 4;
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        }
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        break;
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    case 16:
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        avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
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        break;
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2
    case 24:
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2
        avctx->pix_fmt = AV_PIX_FMT_BGR24;
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        break;
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    default:
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        av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
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        return -1;
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    }
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    s->frame = av_frame_alloc();
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    if (!s->frame)
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        return AVERROR(ENOMEM);
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    return 0;
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}
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static int aasc_decode_frame(AVCodecContext *avctx,
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                              void *data, int *got_frame,
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                              AVPacket *avpkt)
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{
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    const uint8_t *buf = avpkt->data;
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    int buf_size       = avpkt->size;
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    AascContext *s     = avctx->priv_data;
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    int compr, i, stride, psize, ret;
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    if (buf_size < 4) {
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        av_log(avctx, AV_LOG_ERROR, "frame too short\n");
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        return AVERROR_INVALIDDATA;
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    }
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    if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
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        return ret;
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    compr     = AV_RL32(buf);
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    buf      += 4;
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    buf_size -= 4;
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    psize = avctx->bits_per_coded_sample / 8;
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    switch (avctx->codec_tag) {
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    case MKTAG('A', 'A', 'S', '4'):
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        bytestream2_init(&s->gb, buf - 4, buf_size + 4);
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        ff_msrle_decode(avctx, s->frame, 8, &s->gb);
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        break;
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    case MKTAG('A', 'A', 'S', 'C'):
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    switch (compr) {
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    case 0:
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        stride = (avctx->width * psize + psize) & ~psize;
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        if (buf_size < stride * avctx->height)
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            return AVERROR_INVALIDDATA;
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        for (i = avctx->height - 1; i >= 0; i--) {
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            memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize);
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            buf += stride;
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            buf_size -= stride;
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        }
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        break;
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    case 1:
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        bytestream2_init(&s->gb, buf, buf_size);
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        ff_msrle_decode(avctx, s->frame, 8, &s->gb);
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        break;
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    default:
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        av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
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        return AVERROR_INVALIDDATA;
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    }
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        break;
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    default:
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        av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
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        return -1;
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    }
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    if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
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        memcpy(s->frame->data[1], s->palette, s->palette_size);
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    *got_frame = 1;
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    if ((ret = av_frame_ref(data, s->frame)) < 0)
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        return ret;
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    /* report that the buffer was completely consumed */
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    return avpkt->size;
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}
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static av_cold int aasc_decode_end(AVCodecContext *avctx)
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{
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    AascContext *s = avctx->priv_data;
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    av_frame_free(&s->frame);
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    return 0;
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}
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AVCodec ff_aasc_decoder = {
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    .name           = "aasc",
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    .long_name      = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_AASC,
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    .priv_data_size = sizeof(AascContext),
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    .init           = aasc_decode_init,
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    .close          = aasc_decode_end,
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    .decode         = aasc_decode_frame,
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    .capabilities   = AV_CODEC_CAP_DR1,
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    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
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};