diff options
Diffstat (limited to 'libavformat/v210.c')
| -rw-r--r-- | libavformat/v210.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/libavformat/v210.c b/libavformat/v210.c new file mode 100644 index 0000000000..31387a4d48 --- /dev/null +++ b/libavformat/v210.c @@ -0,0 +1,130 @@ +/* + * Raw v210 video demuxer + * Copyright (c) 2015 Tiancheng "Timothy" Gu + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; 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 V210DemuxerContext { + const AVClass *class; /**< Class for private options. */ + int width, height; /**< Integers describing video size, set by a private option. */ + AVRational framerate; /**< AVRational describing framerate, set by a private option. */ +} V210DemuxerContext; + +// v210 frame width is padded to multiples of 48 +#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3) + +static int v210_read_header(AVFormatContext *ctx) +{ + V210DemuxerContext *s = ctx->priv_data; + AVStream *st; + int ret; + + 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; + + avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num); + + ret = av_image_check_size(s->width, s->height, 0, ctx); + if (ret < 0) + return ret; + st->codec->width = s->width; + st->codec->height = s->height; + st->codec->pix_fmt = ctx->iformat->raw_codec_id == AV_CODEC_ID_V210 ? + AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16; + ctx->packet_size = GET_PACKET_SIZE(s->width, s->height); + st->codec->bit_rate = av_rescale_q(ctx->packet_size, + (AVRational){8,1}, st->time_base); + + return 0; +} + + +static int v210_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + int ret; + + ret = av_get_packet(s->pb, pkt, s->packet_size); + pkt->pts = pkt->dts = pkt->pos / s->packet_size; + + pkt->stream_index = 0; + if (ret < 0) + return ret; + return 0; +} + +#define OFFSET(x) offsetof(V210DemuxerContext, x) +#define DEC AV_OPT_FLAG_DECODING_PARAM +static const AVOption v210_options[] = { + { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, + { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC }, + { NULL }, +}; + +#if CONFIG_V210_DEMUXER +static const AVClass v210_demuxer_class = { + .class_name = "v210 demuxer", + .item_name = av_default_item_name, + .option = v210_options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVInputFormat ff_v210_demuxer = { + .name = "v210", + .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), + .priv_data_size = sizeof(V210DemuxerContext), + .read_header = v210_read_header, + .read_packet = v210_read_packet, + .flags = AVFMT_GENERIC_INDEX, + .extensions = "v210", + .raw_codec_id = AV_CODEC_ID_V210, + .priv_class = &v210_demuxer_class, +}; +#endif // CONFIG_V210_DEMUXER + +#if CONFIG_V210X_DEMUXER +static const AVClass v210x_demuxer_class = { + .class_name = "v210x demuxer", + .item_name = av_default_item_name, + .option = v210_options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVInputFormat ff_v210x_demuxer = { + .name = "v210x", + .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), + .priv_data_size = sizeof(V210DemuxerContext), + .read_header = v210_read_header, + .read_packet = v210_read_packet, + .flags = AVFMT_GENERIC_INDEX, + .extensions = "yuv10", + .raw_codec_id = AV_CODEC_ID_V210X, + .priv_class = &v210x_demuxer_class, +}; +#endif // CONFIG_V210X_DEMUXER |