mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
f890677d05
avpicture_get_size() -> av_image_get_buffer_size() Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
129 lines
4.1 KiB
C
129 lines
4.1 KiB
C
/*
|
|
* RAW video demuxer
|
|
* Copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/parseutils.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavutil/opt.h"
|
|
#include "internal.h"
|
|
#include "avformat.h"
|
|
|
|
typedef struct RawVideoDemuxerContext {
|
|
const AVClass *class; /**< Class for private options. */
|
|
char *video_size; /**< String describing video size, set by a private option. */
|
|
char *pixel_format; /**< Set by a private option. */
|
|
char *framerate; /**< String describing framerate, set by a private option. */
|
|
} RawVideoDemuxerContext;
|
|
|
|
|
|
static int rawvideo_read_header(AVFormatContext *ctx)
|
|
{
|
|
RawVideoDemuxerContext *s = ctx->priv_data;
|
|
int width = 0, height = 0, ret = 0;
|
|
enum AVPixelFormat pix_fmt;
|
|
AVRational framerate;
|
|
AVStream *st;
|
|
|
|
st = avformat_new_stream(ctx, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
|
|
st->codec->codec_id = ctx->iformat->raw_codec_id;
|
|
|
|
if (s->video_size &&
|
|
(ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
|
|
return ret;
|
|
}
|
|
|
|
if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
|
|
av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
|
|
s->pixel_format);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
|
|
s->framerate);
|
|
return ret;
|
|
}
|
|
|
|
avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
|
|
|
|
st->codec->width = width;
|
|
st->codec->height = height;
|
|
st->codec->pix_fmt = pix_fmt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int packet_size, ret, width, height;
|
|
AVStream *st = s->streams[0];
|
|
|
|
width = st->codec->width;
|
|
height = st->codec->height;
|
|
|
|
packet_size = av_image_get_buffer_size(st->codec->pix_fmt, width, height, 1);
|
|
if (packet_size < 0)
|
|
return -1;
|
|
|
|
ret = av_get_packet(s->pb, pkt, packet_size);
|
|
pkt->pts = pkt->dts = pkt->pos / packet_size;
|
|
|
|
pkt->stream_index = 0;
|
|
if (ret < 0)
|
|
return ret;
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
|
|
#define DEC AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption rawvideo_options[] = {
|
|
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
|
|
{ "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
|
|
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass rawvideo_demuxer_class = {
|
|
.class_name = "rawvideo demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = rawvideo_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVInputFormat ff_rawvideo_demuxer = {
|
|
.name = "rawvideo",
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw video"),
|
|
.priv_data_size = sizeof(RawVideoDemuxerContext),
|
|
.read_header = rawvideo_read_header,
|
|
.read_packet = rawvideo_read_packet,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
.extensions = "yuv,cif,qcif,rgb",
|
|
.raw_codec_id = AV_CODEC_ID_RAWVIDEO,
|
|
.priv_class = &rawvideo_demuxer_class,
|
|
};
|