/*
  * Copyright (c) 2013-2014 Mozilla Corporation
  *

  * 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
  * Opus parser
  *
  * Determines the duration for each packet.
  */
 
 #include "avcodec.h"
 #include "opus.h"
 
 typedef struct OpusParseContext {
     OpusContext ctx;
     OpusPacket pkt;
     int extradata_parsed;
 } OpusParseContext;
 
 static int opus_parse(AVCodecParserContext *ctx, AVCodecContext *avctx,
                       const uint8_t **poutbuf, int *poutbuf_size,
                       const uint8_t *buf, int buf_size)
 {
     OpusParseContext *s = ctx->priv_data;
     int ret;
 
     if (!buf_size)
         return 0;
 
     if (avctx->extradata && !s->extradata_parsed) {
         ret = ff_opus_parse_extradata(avctx, &s->ctx);
         if (ret < 0) {
             av_log(avctx, AV_LOG_ERROR, "Error parsing Ogg extradata.\n");
             goto fail;
         }
         av_freep(&s->ctx.channel_maps);
         s->extradata_parsed = 1;
     }
 
     ret = ff_opus_parse_packet(&s->pkt, buf, buf_size, s->ctx.nb_streams > 1);
     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR, "Error parsing Opus packet header.\n");
         goto fail;
     }
 
     ctx->duration = s->pkt.frame_count * s->pkt.frame_duration;
 
 fail:
     *poutbuf = buf;
     *poutbuf_size = buf_size;
     return buf_size;
 }
 
 AVCodecParser ff_opus_parser = {
     .codec_ids      = { AV_CODEC_ID_OPUS },
     .priv_data_size = sizeof(OpusParseContext),
     .parser_parse   = opus_parse,
 };