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)
39 size = RAW_PACKET_SIZE;
41 if (av_new_packet(pkt, size) < 0)
42 return AVERROR(ENOMEM);
44 pkt->pos= avio_tell(s->pb);
45 pkt->stream_index = 0;
46 ret = ffio_read_partial(s->pb, pkt->data, size);
51 av_shrink_packet(pkt, ret);
55 int ff_raw_audio_read_header(AVFormatContext *s)
57 AVStream *st = avformat_new_stream(s, NULL);
59 return AVERROR(ENOMEM);
60 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
61 st->codecpar->codec_id = s->iformat->raw_codec_id;
62 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
64 /* the parameters will be extracted from the compressed bitstream */
69 /* MPEG-1/H.263 input */
70 int ff_raw_video_read_header(AVFormatContext *s)
73 FFRawVideoDemuxerContext *s1 = s->priv_data;
77 st = avformat_new_stream(s, NULL);
79 ret = AVERROR(ENOMEM);
83 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
84 st->codecpar->codec_id = s->iformat->raw_codec_id;
85 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
87 st->avg_frame_rate = s1->framerate;
88 st->internal->avctx->framerate = s1->framerate;
89 avpriv_set_pts_info(st, 64, 1, 1200000);
95 int ff_raw_data_read_header(AVFormatContext *s)
97 AVStream *st = avformat_new_stream(s, NULL);
99 return AVERROR(ENOMEM);
100 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
101 st->codecpar->codec_id = s->iformat->raw_codec_id;
106 /* Note: Do not forget to add new entries to the Makefile as well. */
108 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
109 #define DEC AV_OPT_FLAG_DECODING_PARAM
110 const AVOption ff_rawvideo_options[] = {
111 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC},
115 #if CONFIG_DATA_DEMUXER
116 AVInputFormat ff_data_demuxer = {
118 .long_name = NULL_IF_CONFIG_SMALL("raw data"),
119 .read_header = ff_raw_data_read_header,
120 .read_packet = ff_raw_read_partial_packet,
121 .raw_codec_id = AV_CODEC_ID_NONE,
122 .flags = AVFMT_NOTIMESTAMPS,
126 #if CONFIG_MJPEG_DEMUXER
127 static int mjpeg_probe(AVProbeData *p)
134 for (i=0; i<p->buf_size-2; i++) {
136 if (p->buf[i] != 0xFF)
170 if ( (c >= 0x02 && c <= 0xBF)
177 if (nb_invalid*4 + 1 < nb_frames) {
178 static const char ct_jpeg[] = "\r\nContent-Type: image/jpeg\r\n";
181 for (i=0; i<FFMIN(p->buf_size - (int)sizeof(ct_jpeg), 100); i++)
182 if (!memcmp(p->buf + i, ct_jpeg, sizeof(ct_jpeg) - 1))
183 return AVPROBE_SCORE_EXTENSION;
185 if (nb_invalid == 0 && nb_frames > 2)
186 return AVPROBE_SCORE_EXTENSION / 2;
187 return AVPROBE_SCORE_EXTENSION / 4;
193 FF_DEF_RAWVIDEO_DEMUXER2(mjpeg, "raw MJPEG video", mjpeg_probe, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)