1/* 2 * Raw v210 video demuxer 3 * Copyright (c) 2015 Tiancheng "Timothy" Gu 4 * 5 * This file is part of FFmpeg. 6 * 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. 11 * 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. 16 * 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 20 */ 21 22#include "libavutil/imgutils.h" 23#include "libavutil/parseutils.h" 24#include "libavutil/pixdesc.h" 25#include "libavutil/opt.h" 26#include "internal.h" 27#include "avformat.h" 28 29typedef struct V210DemuxerContext { 30 const AVClass *class; /**< Class for private options. */ 31 int width, height; /**< Integers describing video size, set by a private option. */ 32 AVRational framerate; /**< AVRational describing framerate, set by a private option. */ 33} V210DemuxerContext; 34 35// v210 frame width is padded to multiples of 48 36#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3) 37 38static int v210_read_header(AVFormatContext *ctx) 39{ 40 V210DemuxerContext *s = ctx->priv_data; 41 AVStream *st; 42 int ret; 43 44 st = avformat_new_stream(ctx, NULL); 45 if (!st) 46 return AVERROR(ENOMEM); 47 48 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; 49 50 st->codecpar->codec_id = ctx->iformat->raw_codec_id; 51 52 avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num); 53 54 ret = av_image_check_size(s->width, s->height, 0, ctx); 55 if (ret < 0) 56 return ret; 57 st->codecpar->width = s->width; 58 st->codecpar->height = s->height; 59 st->codecpar->format = ctx->iformat->raw_codec_id == AV_CODEC_ID_V210 ? 60 AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16; 61 ctx->packet_size = GET_PACKET_SIZE(s->width, s->height); 62 st->codecpar->bit_rate = av_rescale_q(ctx->packet_size, 63 (AVRational){8,1}, st->time_base); 64 65 return 0; 66} 67 68 69static int v210_read_packet(AVFormatContext *s, AVPacket *pkt) 70{ 71 int ret; 72 73 ret = av_get_packet(s->pb, pkt, s->packet_size); 74 pkt->pts = pkt->dts = pkt->pos / s->packet_size; 75 76 pkt->stream_index = 0; 77 if (ret < 0) 78 return ret; 79 return 0; 80} 81 82#define OFFSET(x) offsetof(V210DemuxerContext, x) 83#define DEC AV_OPT_FLAG_DECODING_PARAM 84static const AVOption v210_options[] = { 85 { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, 86 { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC }, 87 { NULL }, 88}; 89 90#if CONFIG_V210_DEMUXER 91static const AVClass v210_demuxer_class = { 92 .class_name = "v210 demuxer", 93 .item_name = av_default_item_name, 94 .option = v210_options, 95 .version = LIBAVUTIL_VERSION_INT, 96}; 97 98AVInputFormat ff_v210_demuxer = { 99 .name = "v210", 100 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), 101 .priv_data_size = sizeof(V210DemuxerContext), 102 .read_header = v210_read_header, 103 .read_packet = v210_read_packet, 104 .flags = AVFMT_GENERIC_INDEX, 105 .extensions = "v210", 106 .raw_codec_id = AV_CODEC_ID_V210, 107 .priv_class = &v210_demuxer_class, 108}; 109#endif // CONFIG_V210_DEMUXER 110 111#if CONFIG_V210X_DEMUXER 112static const AVClass v210x_demuxer_class = { 113 .class_name = "v210x demuxer", 114 .item_name = av_default_item_name, 115 .option = v210_options, 116 .version = LIBAVUTIL_VERSION_INT, 117}; 118 119AVInputFormat ff_v210x_demuxer = { 120 .name = "v210x", 121 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), 122 .priv_data_size = sizeof(V210DemuxerContext), 123 .read_header = v210_read_header, 124 .read_packet = v210_read_packet, 125 .flags = AVFMT_GENERIC_INDEX, 126 .extensions = "yuv10", 127 .raw_codec_id = AV_CODEC_ID_V210X, 128 .priv_class = &v210x_demuxer_class, 129}; 130#endif // CONFIG_V210X_DEMUXER 131