LCOV - code coverage report
Current view: top level - libavcodec - ptx.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 26 35 74.3 %
Date: 2017-12-17 16:07:53 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * V.Flash PTX (.ptx) image decoder
       3             :  * Copyright (c) 2007 Ivo van Poorten
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/common.h"
      23             : #include "libavutil/intreadwrite.h"
      24             : #include "libavutil/imgutils.h"
      25             : #include "avcodec.h"
      26             : #include "internal.h"
      27             : 
      28           2 : static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
      29             :                             AVPacket *avpkt) {
      30           2 :     const uint8_t *buf = avpkt->data;
      31           2 :     const uint8_t *buf_end = avpkt->data + avpkt->size;
      32           2 :     AVFrame * const p = data;
      33             :     unsigned int offset, w, h, y, stride, bytes_per_pixel;
      34             :     int ret;
      35             :     uint8_t *ptr;
      36             : 
      37           2 :     if (buf_end - buf < 14)
      38           0 :         return AVERROR_INVALIDDATA;
      39           2 :     offset          = AV_RL16(buf);
      40           2 :     w               = AV_RL16(buf+8);
      41           2 :     h               = AV_RL16(buf+10);
      42           2 :     bytes_per_pixel = AV_RL16(buf+12) >> 3;
      43             : 
      44           2 :     if (bytes_per_pixel != 2) {
      45           0 :         avpriv_request_sample(avctx, "Image format not RGB15");
      46           0 :         return AVERROR_PATCHWELCOME;
      47             :     }
      48             : 
      49           2 :     avctx->pix_fmt = AV_PIX_FMT_BGR555LE;
      50             : 
      51           2 :     if (buf_end - buf < offset)
      52           0 :         return AVERROR_INVALIDDATA;
      53           2 :     if (offset != 0x2c)
      54           0 :         avpriv_request_sample(avctx, "offset != 0x2c");
      55             : 
      56           2 :     buf += offset;
      57             : 
      58           2 :     if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
      59           0 :         return ret;
      60             : 
      61           2 :     if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
      62           0 :         return ret;
      63             : 
      64           2 :     p->pict_type = AV_PICTURE_TYPE_I;
      65             : 
      66           2 :     ptr    = p->data[0];
      67           2 :     stride = p->linesize[0];
      68             : 
      69         258 :     for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) {
      70         256 :         memcpy(ptr, buf, w*bytes_per_pixel);
      71         256 :         ptr += stride;
      72         256 :         buf += w*bytes_per_pixel;
      73             :     }
      74             : 
      75           2 :     *got_frame = 1;
      76             : 
      77           2 :     if (y < h) {
      78           0 :         av_log(avctx, AV_LOG_WARNING, "incomplete packet\n");
      79           0 :         return avpkt->size;
      80             :     }
      81             : 
      82           2 :     return offset + w*h*bytes_per_pixel;
      83             : }
      84             : 
      85             : AVCodec ff_ptx_decoder = {
      86             :     .name           = "ptx",
      87             :     .long_name      = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
      88             :     .type           = AVMEDIA_TYPE_VIDEO,
      89             :     .id             = AV_CODEC_ID_PTX,
      90             :     .decode         = ptx_decode_frame,
      91             :     .capabilities   = AV_CODEC_CAP_DR1,
      92             : };

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