/*
  * RAW demuxers
  * Copyright (c) 2001 Fabrice Bellard
  * Copyright (c) 2005 Alex Beregszaszi
  *
  * 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 "avformat.h"

 #include "internal.h"

 #include "avio_internal.h"

 #include "rawdec.h"

 #include "libavutil/opt.h"

 #include "libavutil/parseutils.h"

 #include "libavutil/pixdesc.h"

 #include "libavutil/avassert.h"

 
 #define RAW_PACKET_SIZE 1024
 
 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
 {
     int ret, size;
 
     size = RAW_PACKET_SIZE;
 
     if (av_new_packet(pkt, size) < 0)
         return AVERROR(ENOMEM);
 

     pkt->pos= avio_tell(s->pb);

     pkt->stream_index = 0;

     ret = ffio_read_partial(s->pb, pkt->data, size);

     if (ret < 0) {
         av_free_packet(pkt);
         return ret;
     }

     av_shrink_packet(pkt, ret);

     return ret;
 }
 

 int ff_raw_audio_read_header(AVFormatContext *s)

 {

     AVStream *st = avformat_new_stream(s, NULL);

     if (!st)
         return AVERROR(ENOMEM);
     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

     st->codec->codec_id = s->iformat->raw_codec_id;

     st->need_parsing = AVSTREAM_PARSE_FULL_RAW;

     st->start_time = 0;

     /* the parameters will be extracted from the compressed bitstream */
 
     return 0;
 }
 
 /* MPEG-1/H.263 input */

 int ff_raw_video_read_header(AVFormatContext *s)

 {
     AVStream *st;

     FFRawVideoDemuxerContext *s1 = s->priv_data;
     AVRational framerate;
     int ret = 0;
 

     st = avformat_new_stream(s, NULL);

     if (!st) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }

 
     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

     st->codec->codec_id = s->iformat->raw_codec_id;

     st->need_parsing = AVSTREAM_PARSE_FULL_RAW;

     if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
         av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
         goto fail;

     }

     st->codec->time_base = av_inv_q(framerate);

     avpriv_set_pts_info(st, 64, 1, 1200000);

 fail:
     return ret;

 }
 
 /* Note: Do not forget to add new entries to the Makefile as well. */
 

 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
 #define DEC AV_OPT_FLAG_DECODING_PARAM

 const AVOption ff_rawvideo_options[] = {

     { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC},

     { NULL },
 };
 

 #if CONFIG_LATM_DEMUXER
 AVInputFormat ff_latm_demuxer = {
     .name           = "latm",
     .long_name      = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"),
     .read_header    = ff_raw_audio_read_header,
     .read_packet    = ff_raw_read_partial_packet,

     .flags          = AVFMT_GENERIC_INDEX,
     .extensions     = "latm",

     .raw_codec_id   = AV_CODEC_ID_AAC_LATM,

 };
 #endif
 

 #if CONFIG_MJPEG_DEMUXER

 FF_DEF_RAWVIDEO_DEMUXER(mjpeg, "raw MJPEG video", NULL, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG)

 #endif
 
 #if CONFIG_MLP_DEMUXER

 AVInputFormat ff_mlp_demuxer = {

     .name           = "mlp",
     .long_name      = NULL_IF_CONFIG_SMALL("raw MLP"),
     .read_header    = ff_raw_audio_read_header,
     .read_packet    = ff_raw_read_partial_packet,

     .flags          = AVFMT_GENERIC_INDEX,
     .extensions     = "mlp",

     .raw_codec_id   = AV_CODEC_ID_MLP,

 };
 #endif
 
 #if CONFIG_TRUEHD_DEMUXER

 AVInputFormat ff_truehd_demuxer = {

     .name           = "truehd",
     .long_name      = NULL_IF_CONFIG_SMALL("raw TrueHD"),
     .read_header    = ff_raw_audio_read_header,
     .read_packet    = ff_raw_read_partial_packet,

     .flags          = AVFMT_GENERIC_INDEX,
     .extensions     = "thd",

     .raw_codec_id   = AV_CODEC_ID_TRUEHD,

 };
 #endif
 
 #if CONFIG_SHORTEN_DEMUXER

 AVInputFormat ff_shorten_demuxer = {

     .name           = "shn",
     .long_name      = NULL_IF_CONFIG_SMALL("raw Shorten"),
     .read_header    = ff_raw_audio_read_header,
     .read_packet    = ff_raw_read_partial_packet,

     .flags          = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK,

     .extensions     = "shn",

     .raw_codec_id   = AV_CODEC_ID_SHORTEN,

 };
 #endif
 
 #if CONFIG_VC1_DEMUXER

 FF_DEF_RAWVIDEO_DEMUXER(vc1, "raw VC-1", NULL, "vc1", AV_CODEC_ID_VC1)

 #endif