/* * R3D REDCODE demuxer * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> * * 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 */ //#define DEBUG #include "libavutil/intreadwrite.h" #include "libavutil/dict.h" #include "libavutil/mathematics.h" #include "avformat.h" #include "internal.h" typedef struct { unsigned video_offsets_count; unsigned *video_offsets; unsigned rdvo_offset; } R3DContext; typedef struct { unsigned size; uint32_t tag; uint64_t offset; } Atom; static int read_atom(AVFormatContext *s, Atom *atom) { atom->offset = avio_tell(s->pb); atom->size = avio_rb32(s->pb); if (atom->size < 8) return -1; atom->tag = avio_rl32(s->pb); av_dlog(s, "atom %u %.4s offset %#"PRIx64"\n", atom->size, (char*)&atom->tag, atom->offset); return atom->size; } static int r3d_read_red1(AVFormatContext *s) { AVStream *st = avformat_new_stream(s, NULL); char filename[258]; int tmp; int av_unused tmp2; AVRational framerate; if (!st) return AVERROR(ENOMEM); st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = AV_CODEC_ID_JPEG2000; tmp = avio_r8(s->pb); // major version tmp2 = avio_r8(s->pb); // minor version av_dlog(s, "version %d.%d\n", tmp, tmp2); tmp = avio_rb16(s->pb); // unknown av_dlog(s, "unknown1 %d\n", tmp); tmp = avio_rb32(s->pb); avpriv_set_pts_info(st, 32, 1, tmp); tmp = avio_rb32(s->pb); // filenum av_dlog(s, "filenum %d\n", tmp); avio_skip(s->pb, 32); // unknown st->codec->width = avio_rb32(s->pb); st->codec->height = avio_rb32(s->pb); tmp = avio_rb16(s->pb); // unknown av_dlog(s, "unknown2 %d\n", tmp); framerate.num = avio_rb16(s->pb); framerate.den = avio_rb16(s->pb); if (framerate.num && framerate.den) { #if FF_API_R_FRAME_RATE st->r_frame_rate = #endif st->avg_frame_rate = framerate; } tmp = avio_r8(s->pb); // audio channels av_dlog(s, "audio channels %d\n", tmp); if (tmp > 0) { AVStream *ast = avformat_new_stream(s, NULL); if (!ast) return AVERROR(ENOMEM); ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; ast->codec->codec_id = AV_CODEC_ID_PCM_S32BE; ast->codec->channels = tmp; avpriv_set_pts_info(ast, 32, 1, st->time_base.den); } avio_read(s->pb, filename, 257); filename[sizeof(filename)-1] = 0; av_dict_set(&st->metadata, "filename", filename, 0); av_dlog(s, "filename %s\n", filename); av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height); av_dlog(s, "timescale %d\n", st->time_base.den); av_dlog(s, "frame rate %d/%d\n", framerate.num, framerate.den); return 0; } static int r3d_read_rdvo(AVFormatContext *s, Atom *atom) { R3DContext *r3d = s->priv_data; AVStream *st = s->streams[0]; int i; r3d->video_offsets_count = (atom->size - 8) / 4; r3d->video_offsets = av_malloc(atom->size); if (!r3d->video_offsets) return AVERROR(ENOMEM); for (i = 0; i < r3d->video_offsets_count; i++) { r3d->video_offsets[i] = avio_rb32(s->pb); if (!r3d->video_offsets[i]) { r3d->video_offsets_count = i; break; } av_dlog(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]); } if (st->avg_frame_rate.num) st->duration = av_rescale_q(r3d->video_offsets_count, (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num}, st->time_base); av_dlog(s, "duration %"PRId64"\n", st->duration); return 0; } static void r3d_read_reos(AVFormatContext *s) { R3DContext *r3d = s->priv_data; int av_unused tmp; r3d->rdvo_offset = avio_rb32(s->pb); avio_rb32(s->pb); // rdvs offset avio_rb32(s->pb); // rdao offset avio_rb32(s->pb); // rdas offset tmp = avio_rb32(s->pb); av_dlog(s, "num video chunks %d\n", tmp); tmp = avio_rb32(s->pb); av_dlog(s, "num audio chunks %d\n", tmp); avio_skip(s->pb, 6*4); } static int r3d_read_header(AVFormatContext *s) { R3DContext *r3d = s->priv_data; Atom atom; int ret; if (read_atom(s, &atom) < 0) { av_log(s, AV_LOG_ERROR, "error reading atom\n"); return -1; } if (atom.tag == MKTAG('R','E','D','1')) { if ((ret = r3d_read_red1(s)) < 0) { av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n"); return ret; } } else { av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n"); return -1; } s->data_offset = avio_tell(s->pb); av_dlog(s, "data offset %#"PRIx64"\n", s->data_offset); if (!s->pb->seekable) return 0; // find REOB/REOF/REOS to load index avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET); if (read_atom(s, &atom) < 0) av_log(s, AV_LOG_ERROR, "error reading end atom\n"); if (atom.tag != MKTAG('R','E','O','B') && atom.tag != MKTAG('R','E','O','F') && atom.tag != MKTAG('R','E','O','S')) goto out; r3d_read_reos(s); if (r3d->rdvo_offset) { avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET); if (read_atom(s, &atom) < 0) av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n"); if (atom.tag == MKTAG('R','D','V','O')) { if (r3d_read_rdvo(s, &atom) < 0) av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n"); } } out: avio_seek(s->pb, s->data_offset, SEEK_SET); return 0; } static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom) { AVStream *st = s->streams[0]; int tmp; int av_unused tmp2; uint64_t pos = avio_tell(s->pb); unsigned dts; int ret; dts = avio_rb32(s->pb); tmp = avio_rb32(s->pb); av_dlog(s, "frame num %d\n", tmp); tmp = avio_r8(s->pb); // major version tmp2 = avio_r8(s->pb); // minor version av_dlog(s, "version %d.%d\n", tmp, tmp2); tmp = avio_rb16(s->pb); // unknown av_dlog(s, "unknown %d\n", tmp); if (tmp > 4) { tmp = avio_rb16(s->pb); // unknown av_dlog(s, "unknown %d\n", tmp); tmp = avio_rb16(s->pb); // unknown av_dlog(s, "unknown %d\n", tmp); tmp = avio_rb32(s->pb); av_dlog(s, "width %d\n", tmp); tmp = avio_rb32(s->pb); av_dlog(s, "height %d\n", tmp); tmp = avio_rb32(s->pb); av_dlog(s, "metadata len %d\n", tmp); } tmp = atom->size - 8 - (avio_tell(s->pb) - pos); if (tmp < 0) return -1; ret = av_get_packet(s->pb, pkt, tmp); if (ret < 0) { av_log(s, AV_LOG_ERROR, "error reading video packet\n"); return -1; } pkt->stream_index = 0; pkt->dts = dts; if (st->avg_frame_rate.num) pkt->duration = (uint64_t)st->time_base.den* st->avg_frame_rate.den/st->avg_frame_rate.num; av_dlog(s, "pkt dts %"PRId64" duration %d\n", pkt->dts, pkt->duration); return 0; } static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom) { AVStream *st = s->streams[1]; int av_unused tmp, tmp2; int samples, size; uint64_t pos = avio_tell(s->pb); unsigned dts; int ret; dts = avio_rb32(s->pb); st->codec->sample_rate = avio_rb32(s->pb); samples = avio_rb32(s->pb); tmp = avio_rb32(s->pb); av_dlog(s, "packet num %d\n", tmp); tmp = avio_rb16(s->pb); // unknown av_dlog(s, "unknown %d\n", tmp); tmp = avio_r8(s->pb); // major version tmp2 = avio_r8(s->pb); // minor version av_dlog(s, "version %d.%d\n", tmp, tmp2); tmp = avio_rb32(s->pb); // unknown av_dlog(s, "unknown %d\n", tmp); size = atom->size - 8 - (avio_tell(s->pb) - pos); if (size < 0) return -1; ret = av_get_packet(s->pb, pkt, size); if (ret < 0) { av_log(s, AV_LOG_ERROR, "error reading audio packet\n"); return ret; } pkt->stream_index = 1; pkt->dts = dts; pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate); av_dlog(s, "pkt dts %"PRId64" duration %d samples %d sample rate %d\n", pkt->dts, pkt->duration, samples, st->codec->sample_rate); return 0; } static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt) { Atom atom; int err = 0; while (!err) { if (read_atom(s, &atom) < 0) { err = -1; break; } switch (atom.tag) { case MKTAG('R','E','D','V'): if (s->streams[0]->discard == AVDISCARD_ALL) goto skip; if (!(err = r3d_read_redv(s, pkt, &atom))) return 0; break; case MKTAG('R','E','D','A'): if (s->nb_streams < 2) return -1; if (s->streams[1]->discard == AVDISCARD_ALL) goto skip; if (!(err = r3d_read_reda(s, pkt, &atom))) return 0; break; default: skip: avio_skip(s->pb, atom.size-8); } } return err; } static int r3d_probe(AVProbeData *p) { if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1')) return AVPROBE_SCORE_MAX; return 0; } static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) { AVStream *st = s->streams[0]; // video stream R3DContext *r3d = s->priv_data; int frame_num; if (!st->avg_frame_rate.num) return -1; frame_num = av_rescale_q(sample_time, st->time_base, (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num}); av_dlog(s, "seek frame num %d timestamp %"PRId64"\n", frame_num, sample_time); if (frame_num < r3d->video_offsets_count) { if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0) return -1; } else { av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num); return -1; } return 0; } static int r3d_close(AVFormatContext *s) { R3DContext *r3d = s->priv_data; av_freep(&r3d->video_offsets); return 0; } AVInputFormat ff_r3d_demuxer = { .name = "r3d", .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"), .priv_data_size = sizeof(R3DContext), .read_probe = r3d_probe, .read_header = r3d_read_header, .read_packet = r3d_read_packet, .read_close = r3d_close, .read_seek = r3d_seek, };