3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/imgutils.h"
23 #include "libavutil/parseutils.h"
24 #include "libavutil/pixdesc.h"
25 #include "libavutil/opt.h"
29 typedef struct RawVideoDemuxerContext {
30 const AVClass *class; /**< Class for private options. */
31 char *video_size; /**< String describing video size, set by a private option. */
32 char *pixel_format; /**< Set by a private option. */
33 char *framerate; /**< String describing framerate, set by a private option. */
34 } RawVideoDemuxerContext;
37 static int rawvideo_read_header(AVFormatContext *ctx)
39 RawVideoDemuxerContext *s = ctx->priv_data;
40 int width = 0, height = 0, ret = 0;
41 enum AVPixelFormat pix_fmt;
45 st = avformat_new_stream(ctx, NULL);
47 return AVERROR(ENOMEM);
49 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
51 st->codecpar->codec_id = ctx->iformat->raw_codec_id;
54 (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
55 av_log(ctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
59 if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
60 av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
62 return AVERROR(EINVAL);
65 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
66 av_log(ctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
71 avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
73 st->codecpar->width = width;
74 st->codecpar->height = height;
75 st->codecpar->format = pix_fmt;
81 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
83 int packet_size, ret, width, height;
84 AVStream *st = s->streams[0];
86 width = st->codecpar->width;
87 height = st->codecpar->height;
89 packet_size = av_image_get_buffer_size(st->codecpar->format, width, height, 1);
93 ret = av_get_packet(s->pb, pkt, packet_size);
94 pkt->pts = pkt->dts = pkt->pos / packet_size;
96 pkt->stream_index = 0;
102 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
103 #define DEC AV_OPT_FLAG_DECODING_PARAM
104 static const AVOption rawvideo_options[] = {
105 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
106 { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
107 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
111 static const AVClass rawvideo_demuxer_class = {
112 .class_name = "rawvideo demuxer",
113 .item_name = av_default_item_name,
114 .option = rawvideo_options,
115 .version = LIBAVUTIL_VERSION_INT,
118 AVInputFormat ff_rawvideo_demuxer = {
120 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
121 .priv_data_size = sizeof(RawVideoDemuxerContext),
122 .read_header = rawvideo_read_header,
123 .read_packet = rawvideo_read_packet,
124 .flags = AVFMT_GENERIC_INDEX,
125 .extensions = "yuv,cif,qcif,rgb",
126 .raw_codec_id = AV_CODEC_ID_RAWVIDEO,
127 .priv_class = &rawvideo_demuxer_class,