LCOV - code coverage report
Current view: top level - src/libavcodec - avuidec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 51 63 81.0 %
Date: 2017-04-23 07:57:23 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * AVID Meridien decoder
       3             :  *
       4             :  * Copyright (c) 2012 Carl Eugen Hoyos
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : #include "avcodec.h"
      24             : #include "internal.h"
      25             : #include "libavutil/intreadwrite.h"
      26             : 
      27           6 : static av_cold int avui_decode_init(AVCodecContext *avctx)
      28             : {
      29           6 :     avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
      30           6 :     return 0;
      31             : }
      32             : 
      33         150 : static int avui_decode_frame(AVCodecContext *avctx, void *data,
      34             :                              int *got_frame, AVPacket *avpkt)
      35             : {
      36             :     int ret;
      37         150 :     AVFrame *pic = data;
      38         150 :     const uint8_t *src = avpkt->data, *extradata = avctx->extradata;
      39             :     const uint8_t *srca;
      40             :     uint8_t *y, *u, *v, *a;
      41         150 :     int transparent, interlaced = 1, skip, opaque_length, i, j, k;
      42         150 :     uint32_t extradata_size = avctx->extradata_size;
      43             : 
      44         300 :     while (extradata_size >= 24) {
      45         150 :         uint32_t atom_size = AV_RB32(extradata);
      46         150 :         if (!memcmp(&extradata[4], "APRGAPRG0001", 12)) {
      47         150 :             interlaced = extradata[19] != 1;
      48         150 :             break;
      49             :         }
      50           0 :         if (atom_size && atom_size <= extradata_size) {
      51           0 :             extradata      += atom_size;
      52           0 :             extradata_size -= atom_size;
      53             :         } else {
      54             :             break;
      55             :         }
      56             :     }
      57         150 :     if (avctx->height == 486) {
      58           0 :         skip = 10;
      59             :     } else {
      60         150 :         skip = 16;
      61             :     }
      62         150 :     opaque_length = 2 * avctx->width * (avctx->height + skip) + 4 * interlaced;
      63         150 :     if (avpkt->size < opaque_length) {
      64           0 :         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
      65           0 :         return AVERROR(EINVAL);
      66             :     }
      67         150 :     transparent = avctx->bits_per_coded_sample == 32 &&
      68           0 :                   avpkt->size >= opaque_length * 2 + 4;
      69         150 :     srca = src + opaque_length + 5;
      70             : 
      71         150 :     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
      72           0 :         return ret;
      73             : 
      74         150 :     pic->key_frame = 1;
      75         150 :     pic->pict_type = AV_PICTURE_TYPE_I;
      76             : 
      77         150 :     if (!interlaced) {
      78         150 :         src  += avctx->width * skip;
      79         150 :         srca += avctx->width * skip;
      80             :     }
      81             : 
      82         300 :     for (i = 0; i < interlaced + 1; i++) {
      83         150 :         src  += avctx->width * skip;
      84         150 :         srca += avctx->width * skip;
      85         150 :         if (interlaced && avctx->height == 486) {
      86           0 :             y = pic->data[0] + (1 - i) * pic->linesize[0];
      87           0 :             u = pic->data[1] + (1 - i) * pic->linesize[1];
      88           0 :             v = pic->data[2] + (1 - i) * pic->linesize[2];
      89           0 :             a = pic->data[3] + (1 - i) * pic->linesize[3];
      90             :         } else {
      91         150 :             y = pic->data[0] + i * pic->linesize[0];
      92         150 :             u = pic->data[1] + i * pic->linesize[1];
      93         150 :             v = pic->data[2] + i * pic->linesize[2];
      94         150 :             a = pic->data[3] + i * pic->linesize[3];
      95             :         }
      96             : 
      97       86550 :         for (j = 0; j < avctx->height >> interlaced; j++) {
      98    31190400 :             for (k = 0; k < avctx->width >> 1; k++) {
      99    31104000 :                 u[    k    ] = *src++;
     100    31104000 :                 y[2 * k    ] = *src++;
     101    31104000 :                 a[2 * k    ] = 0xFF - (transparent ? *srca++ : 0);
     102    31104000 :                 srca++;
     103    31104000 :                 v[    k    ] = *src++;
     104    31104000 :                 y[2 * k + 1] = *src++;
     105    31104000 :                 a[2 * k + 1] = 0xFF - (transparent ? *srca++ : 0);
     106    31104000 :                 srca++;
     107             :             }
     108             : 
     109       86400 :             y += (interlaced + 1) * pic->linesize[0];
     110       86400 :             u += (interlaced + 1) * pic->linesize[1];
     111       86400 :             v += (interlaced + 1) * pic->linesize[2];
     112       86400 :             a += (interlaced + 1) * pic->linesize[3];
     113             :         }
     114         150 :         src  += 4;
     115         150 :         srca += 4;
     116             :     }
     117         150 :     *got_frame       = 1;
     118             : 
     119         150 :     return avpkt->size;
     120             : }
     121             : 
     122             : AVCodec ff_avui_decoder = {
     123             :     .name         = "avui",
     124             :     .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
     125             :     .type         = AVMEDIA_TYPE_VIDEO,
     126             :     .id           = AV_CODEC_ID_AVUI,
     127             :     .init         = avui_decode_init,
     128             :     .decode       = avui_decode_frame,
     129             :     .capabilities = AV_CODEC_CAP_DR1,
     130             :     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
     131             : };

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