3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/parseutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
28 typedef struct RawVideoDemuxerContext {
29 const AVClass *class; /**< Class for private options. */
30 int width, height; /**< Integers describing video size, set by a private option. */
31 char *pixel_format; /**< Set by a private option. */
32 AVRational framerate; /**< AVRational describing framerate, set by a private option. */
33 } RawVideoDemuxerContext;
36 static int rawvideo_read_header(AVFormatContext *ctx)
38 RawVideoDemuxerContext *s = ctx->priv_data;
39 enum AVPixelFormat pix_fmt;
42 st = avformat_new_stream(ctx, NULL);
44 return AVERROR(ENOMEM);
46 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
48 st->codec->codec_id = ctx->iformat->raw_codec_id;
50 if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
51 av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
53 return AVERROR(EINVAL);
56 avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
58 st->codec->width = s->width;
59 st->codec->height = s->height;
60 st->codec->pix_fmt = pix_fmt;
61 st->codec->bit_rate = av_rescale_q(avpicture_get_size(st->codec->pix_fmt, s->width, s->height),
62 (AVRational){8,1}, st->time_base);
68 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
70 int packet_size, ret, width, height;
71 AVStream *st = s->streams[0];
73 width = st->codec->width;
74 height = st->codec->height;
76 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
80 ret = av_get_packet(s->pb, pkt, packet_size);
81 pkt->pts = pkt->dts = pkt->pos / packet_size;
83 pkt->stream_index = 0;
89 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
90 #define DEC AV_OPT_FLAG_DECODING_PARAM
91 static const AVOption rawvideo_options[] = {
92 { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
93 { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
94 { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
98 static const AVClass rawvideo_demuxer_class = {
99 .class_name = "rawvideo demuxer",
100 .item_name = av_default_item_name,
101 .option = rawvideo_options,
102 .version = LIBAVUTIL_VERSION_INT,
105 AVInputFormat ff_rawvideo_demuxer = {
107 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
108 .priv_data_size = sizeof(RawVideoDemuxerContext),
109 .read_header = rawvideo_read_header,
110 .read_packet = rawvideo_read_packet,
111 .flags = AVFMT_GENERIC_INDEX,
112 .extensions = "yuv,cif,qcif,rgb",
113 .raw_codec_id = AV_CODEC_ID_RAWVIDEO,
114 .priv_class = &rawvideo_demuxer_class,