mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
6 years ago
parent
296609f859
commit
0709b0561f
6 changed files with 152 additions and 2 deletions
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/*
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* SER demuxer |
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* Copyright (c) 2018 Paul B Mahol |
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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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#define SER_MAGIC "LUCAM-RECORDER" |
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typedef struct SERDemuxerContext { |
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const AVClass *class; |
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int width, height; |
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AVRational framerate; |
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int64_t end; |
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} SERDemuxerContext; |
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static int ser_probe(AVProbeData *pd) |
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{ |
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if (memcmp(pd->buf, SER_MAGIC, 14) == 0) |
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return AVPROBE_SCORE_MAX; |
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else |
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return 0; |
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} |
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static int ser_read_header(AVFormatContext *s) |
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{ |
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SERDemuxerContext *ser = s->priv_data; |
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enum AVPixelFormat pix_fmt; |
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int depth, color_id, endian; |
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int packet_size; |
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AVStream *st; |
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st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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avio_skip(s->pb, 14); |
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avio_skip(s->pb, 4); |
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color_id = avio_rl32(s->pb); |
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endian = avio_rl32(s->pb); |
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ser->width = avio_rl32(s->pb); |
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ser->height = avio_rl32(s->pb); |
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depth = avio_rl32(s->pb); |
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st->nb_frames = st->duration = avio_rl32(s->pb); |
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avio_skip(s->pb, 120); |
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avio_skip(s->pb, 8); |
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avio_skip(s->pb, 8); |
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switch (color_id) { |
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case 0: pix_fmt = depth <= 8 ? AV_PIX_FMT_GRAY8 : endian ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE; break; |
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case 8: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_RGGB8 : endian ? AV_PIX_FMT_BAYER_RGGB16LE : AV_PIX_FMT_BAYER_RGGB16BE; break; |
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case 9: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_GRBG8 : endian ? AV_PIX_FMT_BAYER_GRBG16LE : AV_PIX_FMT_BAYER_GRBG16BE; break; |
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case 10: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_GBRG8 : endian ? AV_PIX_FMT_BAYER_GBRG16LE : AV_PIX_FMT_BAYER_GBRG16BE; break; |
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case 11: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_BGGR8 : endian ? AV_PIX_FMT_BAYER_BGGR16LE : AV_PIX_FMT_BAYER_BGGR16BE; break; |
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case 100: pix_fmt = depth <= 8 ? AV_PIX_FMT_RGB24 : endian ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE; break; |
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case 101: pix_fmt = depth <= 8 ? AV_PIX_FMT_BGR24 : endian ? AV_PIX_FMT_BGR48LE : AV_PIX_FMT_BGR48BE; break; |
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default: |
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return AVERROR_PATCHWELCOME; |
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} |
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
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st->codecpar->codec_id = s->iformat->raw_codec_id; |
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avpriv_set_pts_info(st, 64, ser->framerate.den, ser->framerate.num); |
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st->codecpar->width = ser->width; |
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st->codecpar->height = ser->height; |
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st->codecpar->format = pix_fmt; |
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packet_size = av_image_get_buffer_size(st->codecpar->format, ser->width, ser->height, 1); |
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if (packet_size < 0) |
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return packet_size; |
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ser->end = 178 + st->nb_frames * packet_size; |
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s->packet_size = packet_size; |
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st->codecpar->bit_rate = av_rescale_q(s->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 ser_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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SERDemuxerContext *ser = s->priv_data; |
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int64_t pos; |
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int ret; |
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pos = avio_tell(s->pb); |
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if (pos >= ser->end) |
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return AVERROR_EOF; |
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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->internal->data_offset) / 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(SERDemuxerContext, x) |
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#define DEC AV_OPT_FLAG_DECODING_PARAM |
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static const AVOption ser_options[] = { |
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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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static const AVClass ser_demuxer_class = { |
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.class_name = "ser demuxer", |
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.item_name = av_default_item_name, |
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.option = ser_options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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AVInputFormat ff_ser_demuxer = { |
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.name = "ser", |
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.long_name = NULL_IF_CONFIG_SMALL("SER (Simple uncompressed video format for astronomical capturing)"), |
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.priv_data_size = sizeof(SERDemuxerContext), |
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.read_probe = ser_probe, |
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.read_header = ser_read_header, |
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.read_packet = ser_read_packet, |
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.flags = AVFMT_GENERIC_INDEX, |
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.extensions = "ser", |
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.raw_codec_id = AV_CODEC_ID_RAWVIDEO, |
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.priv_class = &ser_demuxer_class, |
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}; |
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