mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
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131 lines
4.3 KiB
C
131 lines
4.3 KiB
C
/*
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* Raw v210 video demuxer
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* Copyright (c) 2015 Tiancheng "Timothy" Gu
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/opt.h"
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#include "internal.h"
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#include "avformat.h"
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typedef struct V210DemuxerContext {
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const AVClass *class; /**< Class for private options. */
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int width, height; /**< Integers describing video size, set by a private option. */
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AVRational framerate; /**< AVRational describing framerate, set by a private option. */
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} V210DemuxerContext;
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// v210 frame width is padded to multiples of 48
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#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
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static int v210_read_header(AVFormatContext *ctx)
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{
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V210DemuxerContext *s = ctx->priv_data;
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AVStream *st;
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int ret;
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st = avformat_new_stream(ctx, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = ctx->iformat->raw_codec_id;
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avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
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ret = av_image_check_size(s->width, s->height, 0, ctx);
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if (ret < 0)
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return ret;
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st->codecpar->width = s->width;
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st->codecpar->height = s->height;
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st->codecpar->format = ctx->iformat->raw_codec_id == AV_CODEC_ID_V210 ?
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AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;
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ctx->packet_size = GET_PACKET_SIZE(s->width, s->height);
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st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
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(AVRational){8,1}, st->time_base);
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return 0;
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}
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static int v210_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret;
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ret = av_get_packet(s->pb, pkt, s->packet_size);
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pkt->pts = pkt->dts = pkt->pos / s->packet_size;
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pkt->stream_index = 0;
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if (ret < 0)
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return ret;
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return 0;
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}
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#define OFFSET(x) offsetof(V210DemuxerContext, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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static const AVOption v210_options[] = {
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{ "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
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{ "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
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{ NULL },
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};
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#if CONFIG_V210_DEMUXER
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static const AVClass v210_demuxer_class = {
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.class_name = "v210 demuxer",
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.item_name = av_default_item_name,
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.option = v210_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVInputFormat ff_v210_demuxer = {
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.name = "v210",
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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.priv_data_size = sizeof(V210DemuxerContext),
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.read_header = v210_read_header,
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.read_packet = v210_read_packet,
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.flags = AVFMT_GENERIC_INDEX,
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.extensions = "v210",
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.raw_codec_id = AV_CODEC_ID_V210,
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.priv_class = &v210_demuxer_class,
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};
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#endif // CONFIG_V210_DEMUXER
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#if CONFIG_V210X_DEMUXER
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static const AVClass v210x_demuxer_class = {
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.class_name = "v210x demuxer",
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.item_name = av_default_item_name,
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.option = v210_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVInputFormat ff_v210x_demuxer = {
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.name = "v210x",
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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.priv_data_size = sizeof(V210DemuxerContext),
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.read_header = v210_read_header,
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.read_packet = v210_read_packet,
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.flags = AVFMT_GENERIC_INDEX,
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.extensions = "yuv10",
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.raw_codec_id = AV_CODEC_ID_V210X,
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.priv_class = &v210x_demuxer_class,
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};
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#endif // CONFIG_V210X_DEMUXER
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