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 "rawdec.h"
  25
  26 /* raw input */
  27 int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
  28 {
  29     AVStream *st;
  30     enum CodecID id;
  31
  32     st = av_new_stream(s, 0);
  33     if (!st)
  34         return AVERROR(ENOMEM);
  35
  36         id = s->iformat->value;
  37         if (id == CODEC_ID_RAWVIDEO) {
  38             st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  39         } else {
  40             st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
  41         }
  42         st->codec->codec_id = id;
  43
  44         switch(st->codec->codec_type) {
  45         case AVMEDIA_TYPE_AUDIO:
  46             st->codec->sample_rate = ap->sample_rate;
  47             if(ap->channels) st->codec->channels = ap->channels;
  48             else             st->codec->channels = 1;
  49             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
  50             assert(st->codec->bits_per_coded_sample > 0);
  51             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
  52             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
  53             break;
  54         case AVMEDIA_TYPE_VIDEO:
  55             if(ap->time_base.num)
  56                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
  57             else
  58                 av_set_pts_info(st, 64, 1, 25);
  59             st->codec->width = ap->width;
  60             st->codec->height = ap->height;
  61             st->codec->pix_fmt = ap->pix_fmt;
  62             if(st->codec->pix_fmt == PIX_FMT_NONE)
  63                 st->codec->pix_fmt= PIX_FMT_YUV420P;
  64             break;
  65         default:
  66             return -1;
  67         }
  68     return 0;
  69 }
  70
  71 #define RAW_PACKET_SIZE 1024
  72
  73 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
  74 {
  75     int ret, size;
  76
  77     size = RAW_PACKET_SIZE;
  78
  79     if (av_new_packet(pkt, size) < 0)
  80         return AVERROR(ENOMEM);
  81
  82     pkt->pos= url_ftell(s->pb);
  83     pkt->stream_index = 0;
  84     ret = get_partial_buffer(s->pb, pkt->data, size);
  85     if (ret < 0) {
  86         av_free_packet(pkt);
  87         return ret;
  88     }
  89     pkt->size = ret;
  90     return ret;
  91 }
  92
  93 int ff_raw_audio_read_header(AVFormatContext *s,
  94                              AVFormatParameters *ap)
  95 {
  96     AVStream *st = av_new_stream(s, 0);
  97     if (!st)
  98         return AVERROR(ENOMEM);
  99     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
 100     st->codec->codec_id = s->iformat->value;
 101     st->need_parsing = AVSTREAM_PARSE_FULL;
 102     /* the parameters will be extracted from the compressed bitstream */
 103
 104     return 0;
 105 }
 106
 107 /* MPEG-1/H.263 input */
 108 int ff_raw_video_read_header(AVFormatContext *s,
 109                              AVFormatParameters *ap)
 110 {
 111     AVStream *st;
 112
 113     st = av_new_stream(s, 0);
 114     if (!st)
 115         return AVERROR(ENOMEM);
 116
 117     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
 118     st->codec->codec_id = s->iformat->value;
 119     st->need_parsing = AVSTREAM_PARSE_FULL;
 120
 121     /* for MJPEG, specify frame rate */
 122     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
 123     if (ap->time_base.num) {
 124         st->codec->time_base= ap->time_base;
 125     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
 126                 st->codec->codec_id == CODEC_ID_MPEG4 ||
 127                 st->codec->codec_id == CODEC_ID_DIRAC ||
 128                 st->codec->codec_id == CODEC_ID_DNXHD ||
 129                 st->codec->codec_id == CODEC_ID_VC1   ||
 130                 st->codec->codec_id == CODEC_ID_H264) {
 131         st->codec->time_base= (AVRational){1,25};
 132     }
 133     av_set_pts_info(st, 64, 1, 1200000);
 134
 135     return 0;
 136 }
 137
 138 /* Note: Do not forget to add new entries to the Makefile as well. */
 139
 140 #if CONFIG_G722_DEMUXER
 141 AVInputFormat ff_g722_demuxer = {
 142     "g722",
 143     NULL_IF_CONFIG_SMALL("raw G.722"),
 144     0,
 145     NULL,
 146     ff_raw_read_header,
 147     ff_raw_read_partial_packet,
 148     .flags= AVFMT_GENERIC_INDEX,
 149     .extensions = "g722,722",
 150     .value = CODEC_ID_ADPCM_G722,
 151 };
 152 #endif
 153
 154 #if CONFIG_GSM_DEMUXER
 155 AVInputFormat ff_gsm_demuxer = {
 156     "gsm",
 157     NULL_IF_CONFIG_SMALL("raw GSM"),
 158     0,
 159     NULL,
 160     ff_raw_audio_read_header,
 161     ff_raw_read_partial_packet,
 162     .flags= AVFMT_GENERIC_INDEX,
 163     .extensions = "gsm",
 164     .value = CODEC_ID_GSM,
 165 };
 166 #endif
 167
 168 #if CONFIG_MJPEG_DEMUXER
 169 AVInputFormat ff_mjpeg_demuxer = {
 170     "mjpeg",
 171     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
 172     0,
 173     NULL,
 174     ff_raw_video_read_header,
 175     ff_raw_read_partial_packet,
 176     .flags= AVFMT_GENERIC_INDEX,
 177     .extensions = "mjpg,mjpeg",
 178     .value = CODEC_ID_MJPEG,
 179 };
 180 #endif
 181
 182 #if CONFIG_MLP_DEMUXER
 183 AVInputFormat ff_mlp_demuxer = {
 184     "mlp",
 185     NULL_IF_CONFIG_SMALL("raw MLP"),
 186     0,
 187     NULL,
 188     ff_raw_audio_read_header,
 189     ff_raw_read_partial_packet,
 190     .flags= AVFMT_GENERIC_INDEX,
 191     .extensions = "mlp",
 192     .value = CODEC_ID_MLP,
 193 };
 194 #endif
 195
 196 #if CONFIG_TRUEHD_DEMUXER
 197 AVInputFormat ff_truehd_demuxer = {
 198     "truehd",
 199     NULL_IF_CONFIG_SMALL("raw TrueHD"),
 200     0,
 201     NULL,
 202     ff_raw_audio_read_header,
 203     ff_raw_read_partial_packet,
 204     .flags= AVFMT_GENERIC_INDEX,
 205     .extensions = "thd",
 206     .value = CODEC_ID_TRUEHD,
 207 };
 208 #endif
 209
 210 #if CONFIG_SHORTEN_DEMUXER
 211 AVInputFormat ff_shorten_demuxer = {
 212     "shn",
 213     NULL_IF_CONFIG_SMALL("raw Shorten"),
 214     0,
 215     NULL,
 216     ff_raw_audio_read_header,
 217     ff_raw_read_partial_packet,
 218     .flags= AVFMT_GENERIC_INDEX,
 219     .extensions = "shn",
 220     .value = CODEC_ID_SHORTEN,
 221 };
 222 #endif
 223
 224 #if CONFIG_VC1_DEMUXER
 225 AVInputFormat ff_vc1_demuxer = {
 226     "vc1",
 227     NULL_IF_CONFIG_SMALL("raw VC-1"),
 228     0,
 229     NULL /* vc1_probe */,
 230     ff_raw_video_read_header,
 231     ff_raw_read_partial_packet,
 232     .extensions = "vc1",
 233     .value = CODEC_ID_VC1,
 234 };
 235 #endif