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 "internal.h"
  25 #include "avio_internal.h"
  26 #include "rawdec.h"
  27 #include "libavutil/opt.h"
  28 #include "libavutil/parseutils.h"
  29 #include "libavutil/pixdesc.h"
  30
  31 /* raw input */
  32 int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
  33 {
  34     AVStream *st;
  35     enum CodecID id;
  36
  37     st = avformat_new_stream(s, NULL);
  38     if (!st)
  39         return AVERROR(ENOMEM);
  40
  41         id = s->iformat->value;
  42         if (id == CODEC_ID_RAWVIDEO) {
  43             st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  44         } else {
  45             st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
  46         }
  47         st->codec->codec_id = id;
  48
  49         switch(st->codec->codec_type) {
  50         case AVMEDIA_TYPE_AUDIO: {
  51             RawAudioDemuxerContext *s1 = s->priv_data;
  52
  53             st->codec->channels = 1;
  54
  55             if (id == CODEC_ID_ADPCM_G722)
  56                 st->codec->sample_rate = 16000;
  57
  58             if (s1 && s1->sample_rate)
  59                 st->codec->sample_rate = s1->sample_rate;
  60             if (s1 && s1->channels)
  61                 st->codec->channels    = s1->channels;
  62
  63             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
  64             assert(st->codec->bits_per_coded_sample > 0);
  65             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
  66             avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
  67             break;
  68             }
  69         case AVMEDIA_TYPE_VIDEO: {
  70             FFRawVideoDemuxerContext *s1 = s->priv_data;
  71             int width = 0, height = 0, ret = 0;
  72             enum PixelFormat pix_fmt;
  73             AVRational framerate;
  74
  75             if (s1->video_size && (ret = av_parse_video_size(&width, &height, s1->video_size)) < 0) {
  76                 av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
  77                 goto fail;
  78             }
  79             if ((pix_fmt = av_get_pix_fmt(s1->pixel_format)) == PIX_FMT_NONE) {
  80                 av_log(s, AV_LOG_ERROR, "No such pixel format: %s.\n", s1->pixel_format);
  81                 ret = AVERROR(EINVAL);
  82                 goto fail;
  83             }
  84             if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
  85                 av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
  86                 goto fail;
  87             }
  88             avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
  89             st->codec->width  = width;
  90             st->codec->height = height;
  91             st->codec->pix_fmt = pix_fmt;
  92 fail:
  93             return ret;
  94             }
  95         default:
  96             return -1;
  97         }
  98     return 0;
  99 }
 100
 101 #define RAW_PACKET_SIZE 1024
 102
 103 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
 104 {
 105     int ret, size;
 106
 107     size = RAW_PACKET_SIZE;
 108
 109     if (av_new_packet(pkt, size) < 0)
 110         return AVERROR(ENOMEM);
 111
 112     pkt->pos= avio_tell(s->pb);
 113     pkt->stream_index = 0;
 114     ret = ffio_read_partial(s->pb, pkt->data, size);
 115     if (ret < 0) {
 116         av_free_packet(pkt);
 117         return ret;
 118     }
 119     pkt->size = ret;
 120     return ret;
 121 }
 122
 123 int ff_raw_audio_read_header(AVFormatContext *s,
 124                              AVFormatParameters *ap)
 125 {
 126     AVStream *st = avformat_new_stream(s, NULL);
 127     if (!st)
 128         return AVERROR(ENOMEM);
 129     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
 130     st->codec->codec_id = s->iformat->value;
 131     st->need_parsing = AVSTREAM_PARSE_FULL;
 132     /* the parameters will be extracted from the compressed bitstream */
 133
 134     return 0;
 135 }
 136
 137 /* MPEG-1/H.263 input */
 138 int ff_raw_video_read_header(AVFormatContext *s,
 139                              AVFormatParameters *ap)
 140 {
 141     AVStream *st;
 142     FFRawVideoDemuxerContext *s1 = s->priv_data;
 143     AVRational framerate;
 144     int ret = 0;
 145
 146
 147     st = avformat_new_stream(s, NULL);
 148     if (!st) {
 149         ret = AVERROR(ENOMEM);
 150         goto fail;
 151     }
 152
 153     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
 154     st->codec->codec_id = s->iformat->value;
 155     st->need_parsing = AVSTREAM_PARSE_FULL;
 156
 157     if ((ret = av_parse_video_rate(&framerate, s1->framerate)) < 0) {
 158         av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s1->framerate);
 159         goto fail;
 160     }
 161
 162     st->r_frame_rate = st->avg_frame_rate = framerate;
 163     avpriv_set_pts_info(st, 64, 1, 1200000);
 164
 165 fail:
 166     return ret;
 167 }
 168
 169 /* Note: Do not forget to add new entries to the Makefile as well. */
 170
 171 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
 172 #define DEC AV_OPT_FLAG_DECODING_PARAM
 173 const AVOption ff_rawvideo_options[] = {
 174     { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC},
 175     { NULL },
 176 };
 177
 178 #if CONFIG_G722_DEMUXER
 179 AVInputFormat ff_g722_demuxer = {
 180     .name           = "g722",
 181     .long_name      = NULL_IF_CONFIG_SMALL("raw G.722"),
 182     .read_header    = ff_raw_read_header,
 183     .read_packet    = ff_raw_read_partial_packet,
 184     .flags= AVFMT_GENERIC_INDEX,
 185     .extensions = "g722,722",
 186     .value = CODEC_ID_ADPCM_G722,
 187 };
 188 #endif
 189
 190 #if CONFIG_LATM_DEMUXER
 191 AVInputFormat ff_latm_demuxer = {
 192     .name           = "latm",
 193     .long_name      = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"),
 194     .read_header    = ff_raw_audio_read_header,
 195     .read_packet    = ff_raw_read_partial_packet,
 196     .flags= AVFMT_GENERIC_INDEX,
 197     .extensions = "latm",
 198     .value = CODEC_ID_AAC_LATM,
 199 };
 200 #endif
 201
 202 #if CONFIG_MJPEG_DEMUXER
 203 FF_DEF_RAWVIDEO_DEMUXER(mjpeg, "raw MJPEG video", NULL, "mjpg,mjpeg", CODEC_ID_MJPEG)
 204 #endif
 205
 206 #if CONFIG_MLP_DEMUXER
 207 AVInputFormat ff_mlp_demuxer = {
 208     .name           = "mlp",
 209     .long_name      = NULL_IF_CONFIG_SMALL("raw MLP"),
 210     .read_header    = ff_raw_audio_read_header,
 211     .read_packet    = ff_raw_read_partial_packet,
 212     .flags= AVFMT_GENERIC_INDEX,
 213     .extensions = "mlp",
 214     .value = CODEC_ID_MLP,
 215 };
 216 #endif
 217
 218 #if CONFIG_TRUEHD_DEMUXER
 219 AVInputFormat ff_truehd_demuxer = {
 220     .name           = "truehd",
 221     .long_name      = NULL_IF_CONFIG_SMALL("raw TrueHD"),
 222     .read_header    = ff_raw_audio_read_header,
 223     .read_packet    = ff_raw_read_partial_packet,
 224     .flags= AVFMT_GENERIC_INDEX,
 225     .extensions = "thd",
 226     .value = CODEC_ID_TRUEHD,
 227 };
 228 #endif
 229
 230 #if CONFIG_SHORTEN_DEMUXER
 231 AVInputFormat ff_shorten_demuxer = {
 232     .name           = "shn",
 233     .long_name      = NULL_IF_CONFIG_SMALL("raw Shorten"),
 234     .read_header    = ff_raw_audio_read_header,
 235     .read_packet    = ff_raw_read_partial_packet,
 236     .flags          = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK,
 237     .extensions = "shn",
 238     .value = CODEC_ID_SHORTEN,
 239 };
 240 #endif
 241
 242 #if CONFIG_VC1_DEMUXER
 243 FF_DEF_RAWVIDEO_DEMUXER(vc1, "raw VC-1", NULL, "vc1", CODEC_ID_VC1)
 244 #endif