GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/eatqi.c Lines: 75 82 91.5 %
Date: 2019-11-22 03:34:36 Branches: 15 22 68.2 %

Line Branch Exec Source
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/*
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 * Electronic Arts TQI Video Decoder
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 * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org>
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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 St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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/**
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 * @file
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 * Electronic Arts TQI Video Decoder
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 * @author Peter Ross <pross@xvid.org>
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 * @see http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TQI
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 */
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#include "avcodec.h"
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#include "blockdsp.h"
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#include "bswapdsp.h"
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#include "get_bits.h"
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#include "aandcttab.h"
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#include "eaidct.h"
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#include "idctdsp.h"
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#include "internal.h"
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#include "mpeg12.h"
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typedef struct TqiContext {
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    AVCodecContext *avctx;
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    GetBitContext gb;
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    BlockDSPContext bdsp;
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    BswapDSPContext bsdsp;
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    IDCTDSPContext idsp;
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    ScanTable intra_scantable;
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    void *bitstream_buf;
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    unsigned int bitstream_buf_size;
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    int mb_x, mb_y;
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    uint16_t intra_matrix[64];
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    int last_dc[3];
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    DECLARE_ALIGNED(32, int16_t, block)[6][64];
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} TqiContext;
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3
static av_cold int tqi_decode_init(AVCodecContext *avctx)
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{
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3
    TqiContext *t = avctx->priv_data;
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3
    ff_blockdsp_init(&t->bdsp, avctx);
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3
    ff_bswapdsp_init(&t->bsdsp);
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3
    ff_idctdsp_init(&t->idsp, avctx);
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3
    ff_init_scantable_permutation(t->idsp.idct_permutation, FF_IDCT_PERM_NONE);
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3
    ff_init_scantable(t->idsp.idct_permutation, &t->intra_scantable, ff_zigzag_direct);
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3
    avctx->framerate = (AVRational){ 15, 1 };
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3
    avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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3
    ff_mpeg12_init_vlcs();
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3
    return 0;
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}
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8400
static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
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{
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    int n;
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8400
    t->bdsp.clear_blocks(block[0]);
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58800
    for (n = 0; n < 6; n++) {
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50400
        int ret = ff_mpeg1_decode_block_intra(&t->gb,
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50400
                                              t->intra_matrix,
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50400
                                              t->intra_scantable.permutated,
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50400
                                              t->last_dc, block[n], n, 1);
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50400
        if (ret < 0) {
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            av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
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                   t->mb_x, t->mb_y);
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            return ret;
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        }
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    }
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8400
    return 0;
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}
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8400
static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame,
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                                int16_t (*block)[64])
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{
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8400
    TqiContext *t = avctx->priv_data;
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8400
    ptrdiff_t linesize = frame->linesize[0];
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8400
    uint8_t *dest_y  = frame->data[0] + t->mb_y * 16 * linesize           + t->mb_x * 16;
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8400
    uint8_t *dest_cb = frame->data[1] + t->mb_y *  8 * frame->linesize[1] + t->mb_x *  8;
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8400
    uint8_t *dest_cr = frame->data[2] + t->mb_y *  8 * frame->linesize[2] + t->mb_x *  8;
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8400
    ff_ea_idct_put_c(dest_y                 , linesize, block[0]);
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8400
    ff_ea_idct_put_c(dest_y              + 8, linesize, block[1]);
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8400
    ff_ea_idct_put_c(dest_y + 8*linesize    , linesize, block[2]);
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8400
    ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
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8400
    if (!(avctx->flags & AV_CODEC_FLAG_GRAY)) {
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8400
        ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
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8400
        ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
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    }
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8400
}
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static void tqi_calculate_qtable(TqiContext *t, int quant)
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{
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    const int64_t qscale = (215 - 2*quant)*5;
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    int i;
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    t->intra_matrix[0] = (ff_inv_aanscales[0] * ff_mpeg1_default_intra_matrix[0]) >> 11;
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1792
    for(i=1; i<64; i++)
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1764
        t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14;
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}
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static int tqi_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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    const uint8_t *buf_end = buf+buf_size;
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    TqiContext *t = avctx->priv_data;
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    AVFrame *frame = data;
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    int ret, w, h;
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    if (buf_size < 12)
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        return AVERROR_INVALIDDATA;
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    t->avctx = avctx;
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    w = AV_RL16(&buf[0]);
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    h = AV_RL16(&buf[2]);
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    tqi_calculate_qtable(t, buf[4]);
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    buf += 8;
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    ret = ff_set_dimensions(avctx, w, h);
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    if (ret < 0)
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        return ret;
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    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
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        return ret;
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    av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
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                          buf_end - buf);
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    if (!t->bitstream_buf)
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        return AVERROR(ENOMEM);
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    t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
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                       (buf_end - buf) / 4);
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    init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));
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    t->last_dc[0] =
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    t->last_dc[1] =
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    t->last_dc[2] = 0;
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364
    for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
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8736
        for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
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8400
            if (tqi_decode_mb(t, t->block) < 0)
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                goto end;
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8400
            tqi_idct_put(avctx, frame, t->block);
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        }
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    }
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    end:
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    *got_frame = 1;
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    return buf_size;
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}
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static av_cold int tqi_decode_end(AVCodecContext *avctx)
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{
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3
    TqiContext *t = avctx->priv_data;
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3
    av_freep(&t->bitstream_buf);
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3
    return 0;
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}
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AVCodec ff_eatqi_decoder = {
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    .name           = "eatqi",
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    .long_name      = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_TQI,
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    .priv_data_size = sizeof(TqiContext),
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    .init           = tqi_decode_init,
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    .close          = tqi_decode_end,
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    .decode         = tqi_decode_frame,
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    .capabilities   = AV_CODEC_CAP_DR1,
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};