git.sesse.net Git - ffmpeg/blob - libavformat/rawdec.c

   1 /*
   2  * RAW demuxers
   3  * Copyright (c) 2001 Fabrice Bellard
   4  * Copyright (c) 2005 Alex Beregszaszi
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "avformat.h"
  24 #include "avio_internal.h"
  25 #include "rawdec.h"
  26
  27 /* raw input */
  28 int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
  29 {
  30     AVStream *st;
  31     enum CodecID id;
  32
  33     st = av_new_stream(s, 0);
  34     if (!st)
  35         return AVERROR(ENOMEM);
  36
  37         id = s->iformat->value;
  38         if (id == CODEC_ID_RAWVIDEO) {
  39             st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  40         } else {
  41             st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
  42         }
  43         st->codec->codec_id = id;
  44
  45         switch(st->codec->codec_type) {
  46         case AVMEDIA_TYPE_AUDIO:
  47             st->codec->sample_rate = ap->sample_rate;
  48             if(ap->channels) st->codec->channels = ap->channels;
  49             else             st->codec->channels = 1;
  50             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
  51             assert(st->codec->bits_per_coded_sample > 0);
  52             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
  53             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
  54             break;
  55         case AVMEDIA_TYPE_VIDEO:
  56             if(ap->time_base.num)
  57                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
  58             else
  59                 av_set_pts_info(st, 64, 1, 25);
  60             st->codec->width = ap->width;
  61             st->codec->height = ap->height;
  62             st->codec->pix_fmt = ap->pix_fmt;
  63             if(st->codec->pix_fmt == PIX_FMT_NONE)
  64                 st->codec->pix_fmt= PIX_FMT_YUV420P;
  65             break;
  66         default:
  67             return -1;
  68         }
  69     return 0;
  70 }
  71
  72 #define RAW_PACKET_SIZE 1024
  73
  74 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
  75 {
  76     int ret, size;
  77
  78     size = RAW_PACKET_SIZE;
  79
  80     if (av_new_packet(pkt, size) < 0)
  81         return AVERROR(ENOMEM);
  82
  83     pkt->pos= avio_tell(s->pb);
  84     pkt->stream_index = 0;
  85     ret = ffio_read_partial(s->pb, pkt->data, size);
  86     if (ret < 0) {
  87         av_free_packet(pkt);
  88         return ret;
  89     }
  90     pkt->size = ret;
  91     return ret;
  92 }
  93
  94 int ff_raw_audio_read_header(AVFormatContext *s,
  95                              AVFormatParameters *ap)
  96 {
  97     AVStream *st = av_new_stream(s, 0);
  98     if (!st)
  99         return AVERROR(ENOMEM);
 100     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
 101     st->codec->codec_id = s->iformat->value;
 102     st->need_parsing = AVSTREAM_PARSE_FULL;
 103     st->start_time = 0;
 104     /* the parameters will be extracted from the compressed bitstream */
 105
 106     return 0;
 107 }
 108
 109 /* MPEG-1/H.263 input */
 110 int ff_raw_video_read_header(AVFormatContext *s,
 111                              AVFormatParameters *ap)
 112 {
 113     AVStream *st;
 114
 115     st = av_new_stream(s, 0);
 116     if (!st)
 117         return AVERROR(ENOMEM);
 118
 119     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
 120     st->codec->codec_id = s->iformat->value;
 121     st->need_parsing = AVSTREAM_PARSE_FULL;
 122
 123     /* for MJPEG, specify frame rate */
 124     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
 125     if (ap->time_base.num) {
 126         st->codec->time_base= ap->time_base;
 127     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
 128                 st->codec->codec_id == CODEC_ID_MPEG4 ||
 129                 st->codec->codec_id == CODEC_ID_DIRAC ||
 130                 st->codec->codec_id == CODEC_ID_DNXHD ||
 131                 st->codec->codec_id == CODEC_ID_VC1   ||
 132                 st->codec->codec_id == CODEC_ID_H264) {
 133         st->codec->time_base= (AVRational){1,25};
 134     }
 135     av_set_pts_info(st, 64, 1, 1200000);
 136
 137     return 0;
 138 }
 139
 140 /* Note: Do not forget to add new entries to the Makefile as well. */
 141
 142 #if CONFIG_G722_DEMUXER
 143 AVInputFormat ff_g722_demuxer = {
 144     "g722",
 145     NULL_IF_CONFIG_SMALL("raw G.722"),
 146     0,
 147     NULL,
 148     ff_raw_read_header,
 149     ff_raw_read_partial_packet,
 150     .flags= AVFMT_GENERIC_INDEX,
 151     .extensions = "g722,722",
 152     .value = CODEC_ID_ADPCM_G722,
 153 };
 154 #endif
 155
 156 #if CONFIG_GSM_DEMUXER
 157 AVInputFormat ff_gsm_demuxer = {
 158     "gsm",
 159     NULL_IF_CONFIG_SMALL("raw GSM"),
 160     0,
 161     NULL,
 162     ff_raw_audio_read_header,
 163     ff_raw_read_partial_packet,
 164     .flags= AVFMT_GENERIC_INDEX,
 165     .extensions = "gsm",
 166     .value = CODEC_ID_GSM,
 167 };
 168 #endif
 169
 170 #if CONFIG_MJPEG_DEMUXER
 171 AVInputFormat ff_mjpeg_demuxer = {
 172     "mjpeg",
 173     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
 174     0,
 175     NULL,
 176     ff_raw_video_read_header,
 177     ff_raw_read_partial_packet,
 178     .flags= AVFMT_GENERIC_INDEX,
 179     .extensions = "mjpg,mjpeg",
 180     .value = CODEC_ID_MJPEG,
 181 };
 182 #endif
 183
 184 #if CONFIG_MLP_DEMUXER
 185 AVInputFormat ff_mlp_demuxer = {
 186     "mlp",
 187     NULL_IF_CONFIG_SMALL("raw MLP"),
 188     0,
 189     NULL,
 190     ff_raw_audio_read_header,
 191     ff_raw_read_partial_packet,
 192     .flags= AVFMT_GENERIC_INDEX,
 193     .extensions = "mlp",
 194     .value = CODEC_ID_MLP,
 195 };
 196 #endif
 197
 198 #if CONFIG_TRUEHD_DEMUXER
 199 AVInputFormat ff_truehd_demuxer = {
 200     "truehd",
 201     NULL_IF_CONFIG_SMALL("raw TrueHD"),
 202     0,
 203     NULL,
 204     ff_raw_audio_read_header,
 205     ff_raw_read_partial_packet,
 206     .flags= AVFMT_GENERIC_INDEX,
 207     .extensions = "thd",
 208     .value = CODEC_ID_TRUEHD,
 209 };
 210 #endif
 211
 212 #if CONFIG_SHORTEN_DEMUXER
 213 AVInputFormat ff_shorten_demuxer = {
 214     "shn",
 215     NULL_IF_CONFIG_SMALL("raw Shorten"),
 216     0,
 217     NULL,
 218     ff_raw_audio_read_header,
 219     ff_raw_read_partial_packet,
 220     .flags= AVFMT_GENERIC_INDEX,
 221     .extensions = "shn",
 222     .value = CODEC_ID_SHORTEN,
 223 };
 224 #endif
 225
 226 #if CONFIG_VC1_DEMUXER
 227 AVInputFormat ff_vc1_demuxer = {
 228     "vc1",
 229     NULL_IF_CONFIG_SMALL("raw VC-1"),
 230     0,
 231     NULL /* vc1_probe */,
 232     ff_raw_video_read_header,
 233     ff_raw_read_partial_packet,
 234     .extensions = "vc1",
 235     .value = CODEC_ID_VC1,
 236 };
 237 #endif