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 #include "libavutil/opt.h"
  27 #include "libavutil/parseutils.h"
  28
  29 /* raw input */
  30 int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
  31 {
  32     AVStream *st;
  33     enum CodecID id;
  34
  35     st = av_new_stream(s, 0);
  36     if (!st)
  37         return AVERROR(ENOMEM);
  38
  39         id = s->iformat->value;
  40         if (id == CODEC_ID_RAWVIDEO) {
  41             st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  42         } else {
  43             st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
  44         }
  45         st->codec->codec_id = id;
  46
  47         switch(st->codec->codec_type) {
  48         case AVMEDIA_TYPE_AUDIO: {
  49             RawAudioDemuxerContext *s1 = s->priv_data;
  50
  51 #if FF_API_FORMAT_PARAMETERS
  52             if (ap->sample_rate)
  53                 st->codec->sample_rate = ap->sample_rate;
  54             if (ap->channels)
  55                 st->codec->channels    = ap->channels;
  56             else st->codec->channels   = 1;
  57 #endif
  58
  59             if (s1->sample_rate)
  60                 st->codec->sample_rate = s1->sample_rate;
  61             if (s1->channels)
  62                 st->codec->channels    = s1->channels;
  63
  64             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
  65             assert(st->codec->bits_per_coded_sample > 0);
  66             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
  67             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
  68             break;
  69             }
  70         case AVMEDIA_TYPE_VIDEO: {
  71             FFRawVideoDemuxerContext *s1 = s->priv_data;
  72             int width = 0, height = 0, ret;
  73             if(ap->time_base.num)
  74                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
  75             else
  76                 av_set_pts_info(st, 64, 1, 25);
  77             if (s1->video_size) {
  78                 ret = av_parse_video_size(&width, &height, s1->video_size);
  79                 av_freep(&s1->video_size);
  80                 if (ret < 0) {
  81                     av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
  82                     return ret;
  83                 }
  84             }
  85 #if FF_API_FORMAT_PARAMETERS
  86             if (ap->width > 0)
  87                 width = ap->width;
  88             if (ap->height > 0)
  89                 height = ap->height;
  90 #endif
  91             st->codec->width  = width;
  92             st->codec->height = height;
  93             st->codec->pix_fmt = ap->pix_fmt;
  94             if(st->codec->pix_fmt == PIX_FMT_NONE)
  95                 st->codec->pix_fmt= PIX_FMT_YUV420P;
  96             break;
  97             }
  98         default:
  99             return -1;
 100         }
 101     return 0;
 102 }
 103
 104 #define RAW_PACKET_SIZE 1024
 105
 106 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
 107 {
 108     int ret, size;
 109
 110     size = RAW_PACKET_SIZE;
 111
 112     if (av_new_packet(pkt, size) < 0)
 113         return AVERROR(ENOMEM);
 114
 115     pkt->pos= avio_tell(s->pb);
 116     pkt->stream_index = 0;
 117     ret = ffio_read_partial(s->pb, pkt->data, size);
 118     if (ret < 0) {
 119         av_free_packet(pkt);
 120         return ret;
 121     }
 122     pkt->size = ret;
 123     return ret;
 124 }
 125
 126 int ff_raw_audio_read_header(AVFormatContext *s,
 127                              AVFormatParameters *ap)
 128 {
 129     AVStream *st = av_new_stream(s, 0);
 130     if (!st)
 131         return AVERROR(ENOMEM);
 132     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
 133     st->codec->codec_id = s->iformat->value;
 134     st->need_parsing = AVSTREAM_PARSE_FULL;
 135     /* the parameters will be extracted from the compressed bitstream */
 136
 137     return 0;
 138 }
 139
 140 /* MPEG-1/H.263 input */
 141 int ff_raw_video_read_header(AVFormatContext *s,
 142                              AVFormatParameters *ap)
 143 {
 144     AVStream *st;
 145
 146     st = av_new_stream(s, 0);
 147     if (!st)
 148         return AVERROR(ENOMEM);
 149
 150     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
 151     st->codec->codec_id = s->iformat->value;
 152     st->need_parsing = AVSTREAM_PARSE_FULL;
 153
 154     /* for MJPEG, specify frame rate */
 155     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
 156     if (ap->time_base.num) {
 157         st->codec->time_base= ap->time_base;
 158     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
 159                 st->codec->codec_id == CODEC_ID_MPEG4 ||
 160                 st->codec->codec_id == CODEC_ID_DIRAC ||
 161                 st->codec->codec_id == CODEC_ID_DNXHD ||
 162                 st->codec->codec_id == CODEC_ID_VC1   ||
 163                 st->codec->codec_id == CODEC_ID_H264) {
 164         st->codec->time_base= (AVRational){1,25};
 165     }
 166     av_set_pts_info(st, 64, 1, 1200000);
 167
 168     return 0;
 169 }
 170
 171 /* Note: Do not forget to add new entries to the Makefile as well. */
 172
 173 static const AVOption audio_options[] = {
 174     { "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
 175     { "channels",    "", offsetof(RawAudioDemuxerContext, channels),    FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
 176     { NULL },
 177 };
 178
 179 const AVClass ff_rawaudio_demuxer_class = {
 180     .class_name     = "rawaudio demuxer",
 181     .item_name      = av_default_item_name,
 182     .option         = audio_options,
 183     .version        = LIBAVUTIL_VERSION_INT,
 184 };
 185
 186 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
 187 #define DEC AV_OPT_FLAG_DECODING_PARAM
 188 static const AVOption video_options[] = {
 189     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
 190     { NULL },
 191 };
 192 #undef OFFSET
 193 #undef DEC
 194
 195 const AVClass ff_rawvideo_demuxer_class = {
 196     .class_name     = "rawvideo demuxer",
 197     .item_name      = av_default_item_name,
 198     .option         = video_options,
 199     .version        = LIBAVUTIL_VERSION_INT,
 200 };
 201
 202 #if CONFIG_G722_DEMUXER
 203 AVInputFormat ff_g722_demuxer = {
 204     "g722",
 205     NULL_IF_CONFIG_SMALL("raw G.722"),
 206     sizeof(RawAudioDemuxerContext),
 207     NULL,
 208     ff_raw_read_header,
 209     ff_raw_read_partial_packet,
 210     .flags= AVFMT_GENERIC_INDEX,
 211     .extensions = "g722,722",
 212     .value = CODEC_ID_ADPCM_G722,
 213     .priv_class = &ff_rawaudio_demuxer_class,
 214 };
 215 #endif
 216
 217 #if CONFIG_GSM_DEMUXER
 218 AVInputFormat ff_gsm_demuxer = {
 219     "gsm",
 220     NULL_IF_CONFIG_SMALL("raw GSM"),
 221     0,
 222     NULL,
 223     ff_raw_audio_read_header,
 224     ff_raw_read_partial_packet,
 225     .flags= AVFMT_GENERIC_INDEX,
 226     .extensions = "gsm",
 227     .value = CODEC_ID_GSM,
 228 };
 229 #endif
 230
 231 #if CONFIG_MJPEG_DEMUXER
 232 AVInputFormat ff_mjpeg_demuxer = {
 233     "mjpeg",
 234     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
 235     0,
 236     NULL,
 237     ff_raw_video_read_header,
 238     ff_raw_read_partial_packet,
 239     .flags= AVFMT_GENERIC_INDEX,
 240     .extensions = "mjpg,mjpeg",
 241     .value = CODEC_ID_MJPEG,
 242 };
 243 #endif
 244
 245 #if CONFIG_MLP_DEMUXER
 246 AVInputFormat ff_mlp_demuxer = {
 247     "mlp",
 248     NULL_IF_CONFIG_SMALL("raw MLP"),
 249     0,
 250     NULL,
 251     ff_raw_audio_read_header,
 252     ff_raw_read_partial_packet,
 253     .flags= AVFMT_GENERIC_INDEX,
 254     .extensions = "mlp",
 255     .value = CODEC_ID_MLP,
 256 };
 257 #endif
 258
 259 #if CONFIG_TRUEHD_DEMUXER
 260 AVInputFormat ff_truehd_demuxer = {
 261     "truehd",
 262     NULL_IF_CONFIG_SMALL("raw TrueHD"),
 263     0,
 264     NULL,
 265     ff_raw_audio_read_header,
 266     ff_raw_read_partial_packet,
 267     .flags= AVFMT_GENERIC_INDEX,
 268     .extensions = "thd",
 269     .value = CODEC_ID_TRUEHD,
 270 };
 271 #endif
 272
 273 #if CONFIG_SHORTEN_DEMUXER
 274 AVInputFormat ff_shorten_demuxer = {
 275     "shn",
 276     NULL_IF_CONFIG_SMALL("raw Shorten"),
 277     0,
 278     NULL,
 279     ff_raw_audio_read_header,
 280     ff_raw_read_partial_packet,
 281     .flags= AVFMT_GENERIC_INDEX,
 282     .extensions = "shn",
 283     .value = CODEC_ID_SHORTEN,
 284 };
 285 #endif
 286
 287 #if CONFIG_VC1_DEMUXER
 288 AVInputFormat ff_vc1_demuxer = {
 289     "vc1",
 290     NULL_IF_CONFIG_SMALL("raw VC-1"),
 291     0,
 292     NULL /* vc1_probe */,
 293     ff_raw_video_read_header,
 294     ff_raw_read_partial_packet,
 295     .extensions = "vc1",
 296     .value = CODEC_ID_VC1,
 297 };
 298 #endif