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