/*
  * frame CRC encoder (for codec/format testing)

  * Copyright (c) 2002 Fabrice Bellard

  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 
 #include "libavutil/adler32.h"

 #include "libavutil/avstring.h"

 #include "avformat.h"

 #include "internal.h"

 
 static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
     char buf[256];
 

     snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8d, %8d, 0x%08x",

              pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);

     if (pkt->flags != AV_PKT_FLAG_KEY)
         av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);

     if (pkt->side_data_elems) {

         int i, j;

         av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);

 
         for (i=0; i<pkt->side_data_elems; i++) {

             uint32_t side_data_crc = 0;
             if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) {
                 for (j=0; j<pkt->side_data[i].size; j++) {
                     side_data_crc = av_adler32_update(side_data_crc,
                                                       pkt->side_data[i].data + (j^3),
                                                       1);
                 }
             } else {
                 side_data_crc = av_adler32_update(0,
                                                   pkt->side_data[i].data,
                                                   pkt->side_data[i].size);
             }

             av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08x", pkt->side_data[i].size, side_data_crc);
         }

     }

     av_strlcatf(buf, sizeof(buf), "\n");

     avio_write(s->pb, buf, strlen(buf));

     return 0;
 }
 

 AVOutputFormat ff_framecrc_muxer = {

     .name              = "framecrc",

     .long_name         = NULL_IF_CONFIG_SMALL("framecrc testing"),

     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
     .video_codec       = AV_CODEC_ID_RAWVIDEO,

     .write_header      = ff_framehash_write_header,

     .write_packet      = framecrc_write_packet,

     .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
                          AVFMT_TS_NEGATIVE,

 };