| /* |
| * 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 |
| */ |
| |
| //#define DEBUG |
| |
| #include "libavutil/intreadwrite.h" |
| #include "avformat.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 = url_ftell(s->pb); |
| atom->size = get_be32(s->pb); |
| if (atom->size < 8) |
| return -1; |
| atom->tag = get_le32(s->pb); |
| dprintf(s, "atom %d %.4s offset %#llx\n", |
| atom->size, (char*)&atom->tag, atom->offset); |
| return atom->size; |
| } |
| |
| static int r3d_read_red1(AVFormatContext *s) |
| { |
| AVStream *st = av_new_stream(s, 0); |
| char filename[258]; |
| int tmp, tmp2; |
| |
| if (!st) |
| return -1; |
| st->codec->codec_type = CODEC_TYPE_VIDEO; |
| st->codec->codec_id = CODEC_ID_JPEG2000; |
| |
| tmp = get_byte(s->pb); // major version |
| tmp2 = get_byte(s->pb); // minor version |
| dprintf(s, "version %d.%d\n", tmp, tmp2); |
| |
| tmp = get_be16(s->pb); // unknown |
| dprintf(s, "unknown1 %d\n", tmp); |
| |
| tmp = get_be32(s->pb); |
| av_set_pts_info(st, 32, 1, tmp); |
| |
| tmp = get_be32(s->pb); // filenum |
| dprintf(s, "filenum %d\n", tmp); |
| |
| url_fskip(s->pb, 32); // unknown |
| |
| st->codec->width = get_be32(s->pb); |
| st->codec->height = get_be32(s->pb); |
| |
| tmp = get_be16(s->pb); // unknown |
| dprintf(s, "unknown2 %d\n", tmp); |
| |
| st->codec->time_base.den = get_be16(s->pb); |
| st->codec->time_base.num = get_be16(s->pb); |
| |
| tmp = get_byte(s->pb); // audio channels |
| dprintf(s, "audio channels %d\n", tmp); |
| if (tmp > 0) { |
| AVStream *ast = av_new_stream(s, 1); |
| ast->codec->codec_type = CODEC_TYPE_AUDIO; |
| ast->codec->codec_id = CODEC_ID_PCM_S32BE; |
| ast->codec->channels = tmp; |
| av_set_pts_info(ast, 32, 1, st->time_base.den); |
| } |
| |
| get_buffer(s->pb, filename, 257); |
| filename[sizeof(filename)-1] = 0; |
| av_metadata_set(&st->metadata, "filename", filename); |
| |
| dprintf(s, "filename %s\n", filename); |
| dprintf(s, "resolution %dx%d\n", st->codec->width, st->codec->height); |
| dprintf(s, "timescale %d\n", st->time_base.den); |
| dprintf(s, "frame rate %d/%d\n", |
| st->codec->time_base.num, st->codec->time_base.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] = get_be32(s->pb); |
| if (!r3d->video_offsets[i]) { |
| r3d->video_offsets_count = i; |
| break; |
| } |
| dprintf(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]); |
| } |
| |
| if (st->codec->time_base.den) |
| st->duration = (uint64_t)r3d->video_offsets_count* |
| st->time_base.den*st->codec->time_base.num/st->codec->time_base.den; |
| dprintf(s, "duration %lld\n", st->duration); |
| |
| return 0; |
| } |
| |
| static void r3d_read_reos(AVFormatContext *s) |
| { |
| R3DContext *r3d = s->priv_data; |
| int tmp; |
| |
| r3d->rdvo_offset = get_be32(s->pb); |
| get_be32(s->pb); // rdvs offset |
| get_be32(s->pb); // rdao offset |
| get_be32(s->pb); // rdas offset |
| |
| tmp = get_be32(s->pb); |
| dprintf(s, "num video chunks %d\n", tmp); |
| |
| tmp = get_be32(s->pb); |
| dprintf(s, "num audio chunks %d\n", tmp); |
| |
| url_fskip(s->pb, 6*4); |
| } |
| |
| static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| 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 = url_ftell(s->pb); |
| dprintf(s, "data offset %#llx\n", s->data_offset); |
| if (url_is_streamed(s->pb)) |
| return 0; |
| // find REOB/REOF/REOS to load index |
| url_fseek(s->pb, url_fsize(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) { |
| url_fseek(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: |
| url_fseek(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, tmp2; |
| uint64_t pos = url_ftell(s->pb); |
| unsigned dts; |
| |
| dts = get_be32(s->pb); |
| |
| tmp = get_be32(s->pb); |
| dprintf(s, "frame num %d\n", tmp); |
| |
| tmp = get_byte(s->pb); // major version |
| tmp2 = get_byte(s->pb); // minor version |
| dprintf(s, "version %d.%d\n", tmp, tmp2); |
| |
| tmp = get_be16(s->pb); // unknown |
| dprintf(s, "unknown %d\n", tmp); |
| |
| if (tmp > 4) { |
| tmp = get_be16(s->pb); // unknown |
| dprintf(s, "unknown %d\n", tmp); |
| |
| tmp = get_be16(s->pb); // unknown |
| dprintf(s, "unknown %d\n", tmp); |
| |
| tmp = get_be32(s->pb); |
| dprintf(s, "width %d\n", tmp); |
| tmp = get_be32(s->pb); |
| dprintf(s, "height %d\n", tmp); |
| |
| tmp = get_be32(s->pb); |
| dprintf(s, "metadata len %d\n", tmp); |
| } |
| tmp = atom->size - 8 - (url_ftell(s->pb) - pos); |
| if (tmp < 0) |
| return -1; |
| |
| if (av_get_packet(s->pb, pkt, tmp) != tmp) { |
| av_log(s, AV_LOG_ERROR, "error reading video packet\n"); |
| return -1; |
| } |
| |
| pkt->stream_index = 0; |
| pkt->dts = dts; |
| if (st->codec->time_base.den) |
| pkt->duration = (uint64_t)st->time_base.den* |
| st->codec->time_base.num/st->codec->time_base.den; |
| dprintf(s, "pkt dts %lld 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 tmp, tmp2, samples, size; |
| uint64_t pos = url_ftell(s->pb); |
| unsigned dts; |
| |
| dts = get_be32(s->pb); |
| |
| st->codec->sample_rate = get_be32(s->pb); |
| |
| samples = get_be32(s->pb); |
| |
| tmp = get_be32(s->pb); |
| dprintf(s, "packet num %d\n", tmp); |
| |
| tmp = get_be16(s->pb); // unkown |
| dprintf(s, "unknown %d\n", tmp); |
| |
| tmp = get_byte(s->pb); // major version |
| tmp2 = get_byte(s->pb); // minor version |
| dprintf(s, "version %d.%d\n", tmp, tmp2); |
| |
| tmp = get_be32(s->pb); // unknown |
| dprintf(s, "unknown %d\n", tmp); |
| |
| size = atom->size - 8 - (url_ftell(s->pb) - pos); |
| if (size < 0) |
| return -1; |
| if (av_get_packet(s->pb, pkt, size) != size) { |
| av_log(s, AV_LOG_ERROR, "error reading video packet\n"); |
| return -1; |
| } |
| |
| pkt->stream_index = 1; |
| pkt->dts = dts; |
| pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate); |
| dprintf(s, "pkt dts %lld 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: |
| url_fskip(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->codec->time_base.num || !st->time_base.den) |
| return -1; |
| |
| frame_num = sample_time*st->codec->time_base.den/ |
| ((int64_t)st->codec->time_base.num*st->time_base.den); |
| dprintf(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time); |
| |
| if (frame_num < r3d->video_offsets_count) { |
| url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET); |
| } 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 r3d_demuxer = { |
| "r3d", |
| NULL_IF_CONFIG_SMALL("REDCODE R3D format"), |
| sizeof(R3DContext), |
| r3d_probe, |
| r3d_read_header, |
| r3d_read_packet, |
| r3d_close, |
| r3d_seek, |
| }; |