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 Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; 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     /* the parameters will be extracted from the compressed bitstream */
 104
 105     return 0;
 106 }
 107
 108 /* MPEG-1/H.263 input */
 109 int ff_raw_video_read_header(AVFormatContext *s,
 110                              AVFormatParameters *ap)
 111 {
 112     AVStream *st;
 113
 114     st = av_new_stream(s, 0);
 115     if (!st)
 116         return AVERROR(ENOMEM);
 117
 118     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
 119     st->codec->codec_id = s->iformat->value;
 120     st->need_parsing = AVSTREAM_PARSE_FULL;
 121
 122     /* for MJPEG, specify frame rate */
 123     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
 124     if (ap->time_base.num) {
 125         st->codec->time_base= ap->time_base;
 126     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
 127                 st->codec->codec_id == CODEC_ID_MPEG4 ||
 128                 st->codec->codec_id == CODEC_ID_DIRAC ||
 129                 st->codec->codec_id == CODEC_ID_DNXHD ||
 130                 st->codec->codec_id == CODEC_ID_VC1   ||
 131                 st->codec->codec_id == CODEC_ID_H264) {
 132         st->codec->time_base= (AVRational){1,25};
 133     }
 134     av_set_pts_info(st, 64, 1, 1200000);
 135
 136     return 0;
 137 }
 138
 139 /* Note: Do not forget to add new entries to the Makefile as well. */
 140
 141 #if CONFIG_G722_DEMUXER
 142 AVInputFormat ff_g722_demuxer = {
 143     "g722",
 144     NULL_IF_CONFIG_SMALL("raw G.722"),
 145     0,
 146     NULL,
 147     ff_raw_read_header,
 148     ff_raw_read_partial_packet,
 149     .flags= AVFMT_GENERIC_INDEX,
 150     .extensions = "g722,722",
 151     .value = CODEC_ID_ADPCM_G722,
 152 };
 153 #endif
 154
 155 #if CONFIG_GSM_DEMUXER
 156 AVInputFormat ff_gsm_demuxer = {
 157     "gsm",
 158     NULL_IF_CONFIG_SMALL("raw GSM"),
 159     0,
 160     NULL,
 161     ff_raw_audio_read_header,
 162     ff_raw_read_partial_packet,
 163     .flags= AVFMT_GENERIC_INDEX,
 164     .extensions = "gsm",
 165     .value = CODEC_ID_GSM,
 166 };
 167 #endif
 168
 169 #if CONFIG_MJPEG_DEMUXER
 170 AVInputFormat ff_mjpeg_demuxer = {
 171     "mjpeg",
 172     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
 173     0,
 174     NULL,
 175     ff_raw_video_read_header,
 176     ff_raw_read_partial_packet,
 177     .flags= AVFMT_GENERIC_INDEX,
 178     .extensions = "mjpg,mjpeg",
 179     .value = CODEC_ID_MJPEG,
 180 };
 181 #endif
 182
 183 #if CONFIG_MLP_DEMUXER
 184 AVInputFormat ff_mlp_demuxer = {
 185     "mlp",
 186     NULL_IF_CONFIG_SMALL("raw MLP"),
 187     0,
 188     NULL,
 189     ff_raw_audio_read_header,
 190     ff_raw_read_partial_packet,
 191     .flags= AVFMT_GENERIC_INDEX,
 192     .extensions = "mlp",
 193     .value = CODEC_ID_MLP,
 194 };
 195 #endif
 196
 197 #if CONFIG_TRUEHD_DEMUXER
 198 AVInputFormat ff_truehd_demuxer = {
 199     "truehd",
 200     NULL_IF_CONFIG_SMALL("raw TrueHD"),
 201     0,
 202     NULL,
 203     ff_raw_audio_read_header,
 204     ff_raw_read_partial_packet,
 205     .flags= AVFMT_GENERIC_INDEX,
 206     .extensions = "thd",
 207     .value = CODEC_ID_TRUEHD,
 208 };
 209 #endif
 210
 211 #if CONFIG_SHORTEN_DEMUXER
 212 AVInputFormat ff_shorten_demuxer = {
 213     "shn",
 214     NULL_IF_CONFIG_SMALL("raw Shorten"),
 215     0,
 216     NULL,
 217     ff_raw_audio_read_header,
 218     ff_raw_read_partial_packet,
 219     .flags= AVFMT_GENERIC_INDEX,
 220     .extensions = "shn",
 221     .value = CODEC_ID_SHORTEN,
 222 };
 223 #endif
 224
 225 #if CONFIG_VC1_DEMUXER
 226 AVInputFormat ff_vc1_demuxer = {
 227     "vc1",
 228     NULL_IF_CONFIG_SMALL("raw VC-1"),
 229     0,
 230     NULL /* vc1_probe */,
 231     ff_raw_video_read_header,
 232     ff_raw_read_partial_packet,
 233     .extensions = "vc1",
 234     .value = CODEC_ID_VC1,
 235 };
 236 #endif