/*
  * 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
  */
 
 /**
  * @file
  * XMA2 audio parser
  */
 
 #include "parser.h"
 
 typedef struct XMAParserContext{
     int skip_packets;
 } XMAParserContext;
 
 static int xma_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
                      const uint8_t **poutbuf, int *poutbuf_size,
                      const uint8_t *buf, int buf_size)
 {
     XMAParserContext *s = s1->priv_data;
 
     if (buf_size % 2048 == 0) {
         int duration = 0, packet, nb_packets = buf_size / 2048;
 
         for (packet = 0; packet < nb_packets; packet++) {
             if (s->skip_packets == 0) {
                 duration += buf[packet * 2048] * 128;
                 s->skip_packets = buf[packet * 2048 + 3] + 1;
             }
             s->skip_packets--;
         }
 
         s1->duration = duration;
         s1->key_frame = !!duration;
     }
 
     /* always return the full packet. this parser isn't doing any splitting or
        combining, only packet analysis */
     *poutbuf      = buf;
     *poutbuf_size = buf_size;
     return buf_size;
 }
 
 AVCodecParser ff_xma_parser = {
     .codec_ids      = { AV_CODEC_ID_XMA2 },
     .priv_data_size = sizeof(XMAParserContext),
     .parser_parse   = xma_parse,
 };