r3d.c 10.4 KB
Newer Older
Baptiste Coudurier's avatar
Baptiste Coudurier committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
/*
 * 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);
54
    char filename[258];
Baptiste Coudurier's avatar
Baptiste Coudurier committed
55 56 57
    int tmp, tmp2;

    if (!st)
58
        return AVERROR(ENOMEM);
Baptiste Coudurier's avatar
Baptiste Coudurier committed
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89
    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);
90 91
        if (!ast)
            return AVERROR(ENOMEM);
Baptiste Coudurier's avatar
Baptiste Coudurier committed
92 93 94 95 96 97
        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);
    }

98 99 100
    get_buffer(s->pb, filename, 257);
    filename[sizeof(filename)-1] = 0;
    av_metadata_set(&st->metadata, "filename", filename);
Baptiste Coudurier's avatar
Baptiste Coudurier committed
101

102
    dprintf(s, "filename %s\n", filename);
Baptiste Coudurier's avatar
Baptiste Coudurier committed
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386
    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,
};