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 char *video_size; /**< String describing video size, set by a private option. */
31 char *pixel_format; /**< Set by a private option. */
32 char *framerate; /**< String describing framerate, set by a private option. */
33 } RawVideoDemuxerContext;
36 static int rawvideo_read_header(AVFormatContext *ctx)
38 RawVideoDemuxerContext *s = ctx->priv_data;
39 int width = 0, height = 0, ret = 0;
40 enum AVPixelFormat pix_fmt;
44 st = avformat_new_stream(ctx, NULL);
46 return AVERROR(ENOMEM);
48 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
50 st->codec->codec_id = ctx->iformat->raw_codec_id;
53 (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
54 av_log(ctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
58 if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
59 av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
61 return AVERROR(EINVAL);
64 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
65 av_log(ctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
70 avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
72 st->codec->width = width;
73 st->codec->height = height;
74 st->codec->pix_fmt = pix_fmt;
75 st->codec->bit_rate = av_rescale_q(avpicture_get_size(st->codec->pix_fmt, width, height),
76 (AVRational){8,1}, st->time_base);
82 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
84 int packet_size, ret, width, height;
85 AVStream *st = s->streams[0];
87 width = st->codec->width;
88 height = st->codec->height;
90 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
94 ret = av_get_packet(s->pb, pkt, packet_size);
95 pkt->pts = pkt->dts = pkt->pos / packet_size;
97 pkt->stream_index = 0;
103 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
104 #define DEC AV_OPT_FLAG_DECODING_PARAM
105 static const AVOption rawvideo_options[] = {
106 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
107 { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
108 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
112 static const AVClass rawvideo_demuxer_class = {
113 .class_name = "rawvideo demuxer",
114 .item_name = av_default_item_name,
115 .option = rawvideo_options,
116 .version = LIBAVUTIL_VERSION_INT,
119 AVInputFormat ff_rawvideo_demuxer = {
121 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
122 .priv_data_size = sizeof(RawVideoDemuxerContext),
123 .read_header = rawvideo_read_header,
124 .read_packet = rawvideo_read_packet,
125 .flags = AVFMT_GENERIC_INDEX,
126 .extensions = "yuv,cif,qcif,rgb",
127 .raw_codec_id = AV_CODEC_ID_RAWVIDEO,
128 .priv_class = &rawvideo_demuxer_class,