/* * R3D REDCODE demuxer * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> * * 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/intreadwrite.h" #include "libavutil/dict.h" #include "libavutil/mathematics.h" #include "avformat.h" #include "internal.h" typedef struct R3DContext { unsigned video_offsets_count; unsigned rdvo_offset; int audio_channels; } R3DContext; typedef struct Atom { 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_log(s, AV_LOG_TRACE, "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); R3DContext *r3d = s->priv_data; char filename[258]; int tmp; int ret; int av_unused tmp2; AVRational framerate; if (!st) return AVERROR(ENOMEM); st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; st->codecpar->codec_id = AV_CODEC_ID_JPEG2000; tmp = avio_r8(s->pb); // major version tmp2 = avio_r8(s->pb); // minor version av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2); tmp = avio_rb16(s->pb); // unknown av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp); tmp = avio_rb32(s->pb); avpriv_set_pts_info(st, 32, 1, tmp); tmp = avio_rb32(s->pb); // filenum av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp); avio_skip(s->pb, 32); // unknown st->codecpar->width = avio_rb32(s->pb); st->codecpar->height = avio_rb32(s->pb); tmp = avio_rb16(s->pb); // unknown av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp); framerate.num = avio_rb16(s->pb); framerate.den = avio_rb16(s->pb); if (framerate.num > 0 && framerate.den > 0) { #if FF_API_R_FRAME_RATE st->r_frame_rate = #endif st->avg_frame_rate = framerate; } r3d->audio_channels = avio_r8(s->pb); // audio channels av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp); ret = avio_read(s->pb, filename, 257); if (ret < 257) return ret < 0 ? ret : AVERROR_EOF; filename[sizeof(filename)-1] = 0; av_dict_set(&st->metadata, "filename", filename, 0); av_log(s, AV_LOG_TRACE, "filename %s\n", filename); av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height); av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den); av_log(s, AV_LOG_TRACE, "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; for (i = 0; i < r3d->video_offsets_count; i++) { unsigned video_offset = avio_rb32(s->pb); if (!video_offset) { r3d->video_offsets_count = i; break; } av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, video_offset); } if (st->avg_frame_rate.num) st->duration = av_rescale_q(r3d->video_offsets_count, av_inv_q(st->avg_frame_rate), st->time_base); av_log(s, AV_LOG_TRACE, "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_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp); tmp = avio_rb32(s->pb); av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp); avio_skip(s->pb, 6*4); } static int r3d_read_header(AVFormatContext *s) { FFFormatContext *const si = ffformatcontext(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; } /* we cannot create the audio stream now because we do not know the * sample rate */ if (r3d->audio_channels) s->ctx_flags |= AVFMTCTX_NOHEADER; si->data_offset = avio_tell(s->pb); av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", si->data_offset); if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) 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, si->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; int64_t pos = avio_tell(s->pb); unsigned dts; int ret; dts = avio_rb32(s->pb); tmp = avio_rb32(s->pb); av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp); tmp = avio_r8(s->pb); // major version tmp2 = avio_r8(s->pb); // minor version av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2); tmp = avio_rb16(s->pb); // unknown av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp); if (tmp > 4) { tmp = avio_rb16(s->pb); // unknown av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp); tmp = avio_rb16(s->pb); // unknown av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp); tmp = avio_rb32(s->pb); av_log(s, AV_LOG_TRACE, "width %d\n", tmp); tmp = avio_rb32(s->pb); av_log(s, AV_LOG_TRACE, "height %d\n", tmp); tmp = avio_rb32(s->pb); av_log(s, AV_LOG_TRACE, "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_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration); return 0; } static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom) { R3DContext *r3d = s->priv_data; AVStream *st; int av_unused tmp, tmp2; int samples, size; int64_t pos = avio_tell(s->pb); unsigned dts; int ret; if (s->nb_streams < 2) { st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE; st->codecpar->channels = r3d->audio_channels; avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den); } else { st = s->streams[1]; } dts = avio_rb32(s->pb); st->codecpar->sample_rate = avio_rb32(s->pb); if (st->codecpar->sample_rate <= 0) { av_log(s, AV_LOG_ERROR, "Bad sample rate\n"); return AVERROR_INVALIDDATA; } samples = avio_rb32(s->pb); tmp = avio_rb32(s->pb); av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp); tmp = avio_rb16(s->pb); // unknown av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp); tmp = avio_r8(s->pb); // major version tmp2 = avio_r8(s->pb); // minor version av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2); tmp = avio_rb32(s->pb); // unknown av_log(s, AV_LOG_TRACE, "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; if (st->codecpar->sample_rate && samples > 0) pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate); av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n", pkt->dts, pkt->duration, samples, st->codecpar->sample_rate); return 0; } static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt) { R3DContext *r3d = s->priv_data; 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 (!r3d->audio_channels) return -1; if (s->nb_streams >= 2 && 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(const 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, av_inv_q(st->avg_frame_rate)); av_log(s, AV_LOG_TRACE, "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; } const 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_seek = r3d_seek, };