3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2005 Alex Beregszaszi
6 * This file is part of FFmpeg.
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.
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.
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
25 #include "avio_internal.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/parseutils.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/intreadwrite.h"
33 #define RAW_PACKET_SIZE 1024
35 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
37 FFRawDemuxerContext *raw = s->priv_data;
40 size = raw->raw_packet_size;
42 if ((ret = av_new_packet(pkt, size)) < 0)
45 pkt->pos= avio_tell(s->pb);
46 pkt->stream_index = 0;
47 ret = avio_read_partial(s->pb, pkt->data, size);
52 av_shrink_packet(pkt, ret);
56 int ff_raw_audio_read_header(AVFormatContext *s)
58 AVStream *st = avformat_new_stream(s, NULL);
60 return AVERROR(ENOMEM);
61 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
62 st->codecpar->codec_id = s->iformat->raw_codec_id;
63 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
65 /* the parameters will be extracted from the compressed bitstream */
70 /* MPEG-1/H.263 input */
71 int ff_raw_video_read_header(AVFormatContext *s)
74 FFRawVideoDemuxerContext *s1 = s->priv_data;
78 st = avformat_new_stream(s, NULL);
80 ret = AVERROR(ENOMEM);
84 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
85 st->codecpar->codec_id = s->iformat->raw_codec_id;
86 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
88 st->internal->avctx->framerate = s1->framerate;
89 avpriv_set_pts_info(st, 64, 1, 1200000);
95 int ff_raw_subtitle_read_header(AVFormatContext *s)
97 AVStream *st = avformat_new_stream(s, NULL);
99 return AVERROR(ENOMEM);
100 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
101 st->codecpar->codec_id = s->iformat->raw_codec_id;
106 int ff_raw_data_read_header(AVFormatContext *s)
108 AVStream *st = avformat_new_stream(s, NULL);
110 return AVERROR(ENOMEM);
111 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
112 st->codecpar->codec_id = s->iformat->raw_codec_id;
117 /* Note: Do not forget to add new entries to the Makefile as well. */
119 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
120 #define DEC AV_OPT_FLAG_DECODING_PARAM
121 const AVOption ff_rawvideo_options[] = {
122 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC},
123 { "raw_packet_size", "", OFFSET(raw_packet_size), AV_OPT_TYPE_INT, {.i64 = RAW_PACKET_SIZE }, 1, INT_MAX, DEC},
127 #define OFFSET(x) offsetof(FFRawDemuxerContext, x)
128 const AVOption ff_raw_options[] = {
129 { "raw_packet_size", "", OFFSET(raw_packet_size), AV_OPT_TYPE_INT, {.i64 = RAW_PACKET_SIZE }, 1, INT_MAX, DEC},
133 #if CONFIG_DATA_DEMUXER
134 FF_RAW_DEMUXER_CLASS(raw_data)
136 AVInputFormat ff_data_demuxer = {
138 .long_name = NULL_IF_CONFIG_SMALL("raw data"),
139 .read_header = ff_raw_data_read_header,
140 .read_packet = ff_raw_read_partial_packet,
141 .raw_codec_id = AV_CODEC_ID_NONE,
142 .flags = AVFMT_NOTIMESTAMPS,
143 .priv_data_size = sizeof(FFRawDemuxerContext),\
144 .priv_class = &raw_data_demuxer_class,\
148 #if CONFIG_MJPEG_DEMUXER
149 static int mjpeg_probe(const AVProbeData *p)
156 for (i = 0; i < p->buf_size - 1; i++) {
158 if (p->buf[i] != 0xFF)
192 if ( (c >= 0x02 && c <= 0xBF)
199 if (nb_invalid*4 + 1 < nb_frames) {
200 static const char ct_jpeg[] = "\r\nContent-Type: image/jpeg\r\n";
203 for (i=0; i<FFMIN(p->buf_size - (int)sizeof(ct_jpeg), 100); i++)
204 if (!memcmp(p->buf + i, ct_jpeg, sizeof(ct_jpeg) - 1))
205 return AVPROBE_SCORE_EXTENSION;
207 if (nb_invalid == 0 && nb_frames > 2)
208 return AVPROBE_SCORE_EXTENSION / 2;
209 return AVPROBE_SCORE_EXTENSION / 4;
215 FF_DEF_RAWVIDEO_DEMUXER2(mjpeg, "raw MJPEG video", mjpeg_probe, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)