LCOV - code coverage report
Current view: top level - libavcodec - sp5xdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 37 39 94.9 %
Date: 2017-12-12 03:56:30 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Sunplus JPEG decoder (SP5X)
       3             :  * Copyright (c) 2003 Alex Beregszaszi
       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             : /**
      23             :  * @file
      24             :  * Sunplus JPEG decoder (SP5X).
      25             :  */
      26             : 
      27             : #include "avcodec.h"
      28             : #include "internal.h"
      29             : #include "mjpeg.h"
      30             : #include "mjpegdec.h"
      31             : #include "sp5x.h"
      32             : 
      33             : 
      34         378 : static int sp5x_decode_frame(AVCodecContext *avctx,
      35             :                               void *data, int *got_frame,
      36             :                               AVPacket *avpkt)
      37             : {
      38         378 :     const uint8_t *buf = avpkt->data;
      39         378 :     int buf_size = avpkt->size;
      40             :     AVPacket avpkt_recoded;
      41         378 :     const int qscale = 5;
      42             :     uint8_t *recoded;
      43         378 :     int i = 0, j = 0;
      44             : 
      45         378 :     if (!avctx->width || !avctx->height)
      46           0 :         return -1;
      47             : 
      48         378 :     recoded = av_mallocz(buf_size + 1024);
      49         378 :     if (!recoded)
      50           0 :         return -1;
      51             : 
      52             :     /* SOI */
      53         378 :     recoded[j++] = 0xFF;
      54         378 :     recoded[j++] = 0xD8;
      55             : 
      56         378 :     memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
      57         378 :     memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
      58         378 :     memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
      59         378 :     j += sizeof(sp5x_data_dqt);
      60             : 
      61         378 :     memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
      62         378 :     j += sizeof(sp5x_data_dht);
      63             : 
      64         378 :     memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
      65         378 :     AV_WB16(recoded+j+5, avctx->coded_height);
      66         378 :     AV_WB16(recoded+j+7, avctx->coded_width);
      67         378 :     j += sizeof(sp5x_data_sof);
      68             : 
      69         378 :     memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
      70         378 :     j += sizeof(sp5x_data_sos);
      71             : 
      72         378 :     if(avctx->codec_id==AV_CODEC_ID_AMV)
      73     3659228 :         for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
      74     3658861 :             recoded[j++] = buf[i];
      75             :     else
      76       39435 :     for (i = 14; i < buf_size && j < buf_size+1024-3; i++)
      77             :     {
      78       39424 :         recoded[j++] = buf[i];
      79       39424 :         if (buf[i] == 0xff)
      80          93 :             recoded[j++] = 0;
      81             :     }
      82             : 
      83             :     /* EOI */
      84         378 :     recoded[j++] = 0xFF;
      85         378 :     recoded[j++] = 0xD9;
      86             : 
      87         378 :     av_init_packet(&avpkt_recoded);
      88         378 :     avpkt_recoded.data = recoded;
      89         378 :     avpkt_recoded.size = j;
      90         378 :     i = ff_mjpeg_decode_frame(avctx, data, got_frame, &avpkt_recoded);
      91             : 
      92         378 :     av_free(recoded);
      93             : 
      94         378 :     return i < 0 ? i : avpkt->size;
      95             : }
      96             : 
      97             : #if CONFIG_SP5X_DECODER
      98             : AVCodec ff_sp5x_decoder = {
      99             :     .name           = "sp5x",
     100             :     .long_name      = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
     101             :     .type           = AVMEDIA_TYPE_VIDEO,
     102             :     .id             = AV_CODEC_ID_SP5X,
     103             :     .priv_data_size = sizeof(MJpegDecodeContext),
     104             :     .init           = ff_mjpeg_decode_init,
     105             :     .close          = ff_mjpeg_decode_end,
     106             :     .decode         = sp5x_decode_frame,
     107             :     .capabilities   = AV_CODEC_CAP_DR1,
     108             :     .max_lowres     = 3,
     109             :     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
     110             : };
     111             : #endif
     112             : #if CONFIG_AMV_DECODER
     113             : AVCodec ff_amv_decoder = {
     114             :     .name           = "amv",
     115             :     .long_name      = NULL_IF_CONFIG_SMALL("AMV Video"),
     116             :     .type           = AVMEDIA_TYPE_VIDEO,
     117             :     .id             = AV_CODEC_ID_AMV,
     118             :     .priv_data_size = sizeof(MJpegDecodeContext),
     119             :     .init           = ff_mjpeg_decode_init,
     120             :     .close          = ff_mjpeg_decode_end,
     121             :     .decode         = sp5x_decode_frame,
     122             :     .max_lowres     = 3,
     123             :     .capabilities   = AV_CODEC_CAP_DR1,
     124             :     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
     125             : };
     126             : #endif

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