mlvdec.c 16.5 KB
Newer Older
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
/*
 * Magic Lantern Video (MLV) demuxer
 * Copyright (c) 2014 Peter Ross
 *
 * 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
 */

/**
 * @file
 * Magic Lantern Video (MLV) demuxer
 */

#include "libavutil/eval.h"
28
#include "libavutil/imgutils.h"
29 30 31
#include "libavutil/intreadwrite.h"
#include "libavutil/rational.h"
#include "avformat.h"
32
#include "avio_internal.h"
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
#include "internal.h"
#include "riff.h"

#define MLV_VERSION "v2.0"

#define MLV_VIDEO_CLASS_RAW  1
#define MLV_VIDEO_CLASS_YUV  2
#define MLV_VIDEO_CLASS_JPEG 3
#define MLV_VIDEO_CLASS_H264 4

#define MLV_AUDIO_CLASS_WAV  1

#define MLV_CLASS_FLAG_DELTA 0x40
#define MLV_CLASS_FLAG_LZMA  0x80

typedef struct {
    AVIOContext *pb[101];
    int class[2];
    int stream_index;
    uint64_t pts;
} MlvContext;

static int probe(AVProbeData *p)
{
    if (AV_RL32(p->buf) == MKTAG('M','L','V','I') &&
        AV_RL32(p->buf + 4) >= 52 &&
        !memcmp(p->buf + 8, MLV_VERSION, 5))
        return AVPROBE_SCORE_MAX;
    return 0;
}

static int check_file_header(AVIOContext *pb, uint64_t guid)
{
    unsigned int size;
    uint8_t version[8];

    avio_skip(pb, 4);
    size = avio_rl32(pb);
    if (size < 52)
        return AVERROR_INVALIDDATA;
    avio_read(pb, version, 8);
    if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid)
        return AVERROR_INVALIDDATA;
    avio_skip(pb, size - 24);
    return 0;
}

80
static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, unsigned size)
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
{
    char * value = av_malloc(size + 1);
    if (!value) {
        avio_skip(pb, size);
        return;
    }

    avio_read(pb, value, size);
    if (!value[0]) {
        av_free(value);
        return;
    }

    value[size] = 0;
    av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
}

static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
{
100
    av_dict_set_int(&avctx->metadata, tag, avio_r8(pb), 0);
101 102 103 104
}

static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
{
105
    av_dict_set_int(&avctx->metadata, tag, avio_rl16(pb), 0);
106 107 108 109
}

static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
{
110
    av_dict_set_int(&avctx->metadata, tag, avio_rl32(pb), 0);
111 112 113 114
}

static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
{
115
    av_dict_set_int(&avctx->metadata, tag, avio_rl64(pb), 0);
116 117
}

118
static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
119 120 121
{
    MlvContext *mlv = avctx->priv_data;
    AVIOContext *pb = mlv->pb[file];
122
    int ret;
123
    while (!avio_feof(pb)) {
124 125 126 127 128 129 130 131 132
        int type;
        unsigned int size;
        type = avio_rl32(pb);
        size = avio_rl32(pb);
        avio_skip(pb, 8); //timestamp
        if (size < 16)
            break;
        size -= 16;
        if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
133 134 135
            vst->codecpar->width  = avio_rl16(pb);
            vst->codecpar->height = avio_rl16(pb);
            ret = av_image_check_size(vst->codecpar->width, vst->codecpar->height, 0, avctx);
136 137
            if (ret < 0)
                return ret;
138 139 140
            if (avio_rl32(pb) != 1)
                avpriv_request_sample(avctx, "raw api version");
            avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
141 142 143
            vst->codecpar->bits_per_coded_sample = avio_rl32(pb);
            if (vst->codecpar->bits_per_coded_sample < 0 ||
                vst->codecpar->bits_per_coded_sample > (INT_MAX - 7) / (vst->codecpar->width * vst->codecpar->height)) {
144 145
                av_log(avctx, AV_LOG_ERROR,
                       "invalid bits_per_coded_sample %d (size: %dx%d)\n",
146 147
                       vst->codecpar->bits_per_coded_sample,
                       vst->codecpar->width, vst->codecpar->height);
148 149
                return AVERROR_INVALIDDATA;
            }
150 151 152 153
            avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias
            if (avio_rl32(pb) != 0x2010100) /* RGGB */
                avpriv_request_sample(avctx, "cfa_pattern");
            avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range
154 155
            vst->codecpar->format    = AV_PIX_FMT_BAYER_RGGB16LE;
            vst->codecpar->codec_tag = MKTAG('B', 'I', 'T', 16);
156 157
            size -= 164;
        } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
158
            ret = ff_get_wav_header(avctx, pb, ast->codecpar, 16, 0);
159 160
            if (ret < 0)
                return ret;
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
            size -= 16;
        } else if (type == MKTAG('I','N','F','O')) {
            if (size > 0)
                read_string(avctx, pb, "info", size);
            continue;
        } else if (type == MKTAG('I','D','N','T') && size >= 36) {
            read_string(avctx, pb, "cameraName", 32);
            read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
            size -= 36;
            if (size >= 32) {
                read_string(avctx, pb, "cameraSerial", 32);
                size -= 32;
            }
        } else if (type == MKTAG('L','E','N','S') && size >= 48) {
            read_uint16(avctx, pb, "focalLength", "%i");
            read_uint16(avctx, pb, "focalDist", "%i");
            read_uint16(avctx, pb, "aperture", "%i");
            read_uint8(avctx, pb, "stabilizerMode", "%i");
            read_uint8(avctx, pb, "autofocusMode", "%i");
            read_uint32(avctx, pb, "flags", "0x%"PRIx32);
            read_uint32(avctx, pb, "lensID", "%"PRIi32);
            read_string(avctx, pb, "lensName", 32);
            size -= 48;
            if (size >= 32) {
                read_string(avctx, pb, "lensSerial", 32);
                size -= 32;
            }
        } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
            uint64_t pts = avio_rl32(pb);
            ff_add_index_entry(&vst->index_entries, &vst->nb_index_entries, &vst->index_entries_allocated_size,
                               avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
            size -= 4;
        } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
            uint64_t pts = avio_rl32(pb);
            ff_add_index_entry(&ast->index_entries, &ast->nb_index_entries, &ast->index_entries_allocated_size,
                               avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
            size -= 4;
        } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
            read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
            read_uint32(avctx, pb, "kelvin", "%"PRIi32);
            read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
            read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
            read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
            read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
            read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
            size -= 28;
        } else if (type == MKTAG('R','T','C','I') && size >= 20) {
            char str[32];
            struct tm time = { 0 };
            time.tm_sec    = avio_rl16(pb);
            time.tm_min    = avio_rl16(pb);
            time.tm_hour   = avio_rl16(pb);
            time.tm_mday   = avio_rl16(pb);
            time.tm_mon    = avio_rl16(pb);
            time.tm_year   = avio_rl16(pb);
            time.tm_wday   = avio_rl16(pb);
            time.tm_yday   = avio_rl16(pb);
            time.tm_isdst  = avio_rl16(pb);
            avio_skip(pb, 2);
220 221
            if (strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time))
                av_dict_set(&avctx->metadata, "time", str, 0);
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
            size -= 20;
        } else if (type == MKTAG('E','X','P','O') && size >= 16) {
            av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
            read_uint32(avctx, pb, "isoValue", "%"PRIi32);
            read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
            read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
            size -= 16;
            if (size >= 8) {
                read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
                size -= 8;
            }
        } else if (type == MKTAG('S','T','Y','L') && size >= 36) {
            read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
            read_uint32(avctx, pb, "contrast", "%"PRIi32);
            read_uint32(avctx, pb, "sharpness", "%"PRIi32);
            read_uint32(avctx, pb, "saturation", "%"PRIi32);
            read_uint32(avctx, pb, "colortone", "%"PRIi32);
            read_string(avctx, pb, "picStyleName", 16);
            size -= 36;
        } else if (type == MKTAG('M','A','R','K')) {
        } else if (type == MKTAG('N','U','L','L')) {
        } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
        } else {
245 246
            av_log(avctx, AV_LOG_INFO, "unsupported tag %s, size %u\n",
                   av_fourcc2str(type), size);
247 248 249
        }
        avio_skip(pb, size);
    }
250
    return 0;
251 252 253 254 255 256 257
}

static int read_header(AVFormatContext *avctx)
{
    MlvContext *mlv = avctx->priv_data;
    AVIOContext *pb = avctx->pb;
    AVStream *vst = NULL, *ast = NULL;
258
    int size, ret;
259
    unsigned nb_video_frames, nb_audio_frames;
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
    uint64_t guid;
    char guidstr[32];

    avio_skip(pb, 4);
    size = avio_rl32(pb);
    if (size < 52)
        return AVERROR_INVALIDDATA;

    avio_skip(pb, 8);

    guid = avio_rl64(pb);
    snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
    av_dict_set(&avctx->metadata, "guid", guidstr, 0);

    avio_skip(pb, 8); //fileNum, fileCount, fileFlags

    mlv->class[0] = avio_rl16(pb);
277 278 279 280 281 282
    mlv->class[1] = avio_rl16(pb);

    nb_video_frames = avio_rl32(pb);
    nb_audio_frames = avio_rl32(pb);

    if (nb_video_frames && mlv->class[0]) {
283 284 285 286
        vst = avformat_new_stream(avctx, NULL);
        if (!vst)
            return AVERROR(ENOMEM);
        vst->id = 0;
287
        vst->nb_frames = nb_video_frames;
288 289
        if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)))
            avpriv_request_sample(avctx, "compression");
290
        vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
291 292
        switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
        case MLV_VIDEO_CLASS_RAW:
293
            vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
294 295
            break;
        case MLV_VIDEO_CLASS_YUV:
296 297 298
            vst->codecpar->format   = AV_PIX_FMT_YUV420P;
            vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
            vst->codecpar->codec_tag = 0;
299 300
            break;
        case MLV_VIDEO_CLASS_JPEG:
301 302
            vst->codecpar->codec_id = AV_CODEC_ID_MJPEG;
            vst->codecpar->codec_tag = 0;
303 304
            break;
        case MLV_VIDEO_CLASS_H264:
305 306
            vst->codecpar->codec_id = AV_CODEC_ID_H264;
            vst->codecpar->codec_tag = 0;
307 308 309 310 311 312
            break;
        default:
            avpriv_request_sample(avctx, "unknown video class");
        }
    }

313
    if (nb_audio_frames && mlv->class[1]) {
314 315 316 317
        ast = avformat_new_stream(avctx, NULL);
        if (!ast)
            return AVERROR(ENOMEM);
        ast->id = 1;
318
        ast->nb_frames = nb_audio_frames;
319 320 321 322 323
        if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
            avpriv_request_sample(avctx, "compression");
        if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
            avpriv_request_sample(avctx, "unknown audio class");

324 325
        ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
        avpriv_set_pts_info(ast, 33, 1, ast->codecpar->sample_rate);
326 327 328 329 330 331 332 333 334 335 336 337 338 339
    }

    if (vst) {
       AVRational framerate;
       framerate.num = avio_rl32(pb);
       framerate.den = avio_rl32(pb);
       avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
    } else
       avio_skip(pb, 8);

    avio_skip(pb, size - 52);

    /* scan primary file */
    mlv->pb[100] = avctx->pb;
340 341 342
    ret = scan_file(avctx, vst, ast, 100);
    if (ret < 0)
        return ret;
343 344

    /* scan secondary files */
345
    if (strlen(avctx->url) > 2) {
346
        int i;
347
        char *filename = av_strdup(avctx->url);
348

349 350
        if (!filename)
            return AVERROR(ENOMEM);
351

352 353
        for (i = 0; i < 100; i++) {
            snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
354
            if (avctx->io_open(avctx, &mlv->pb[i], filename, AVIO_FLAG_READ, NULL) < 0)
355 356 357
                break;
            if (check_file_header(mlv->pb[i], guid) < 0) {
                av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
358
                ff_format_io_close(avctx, &mlv->pb[i]);
359 360 361
                continue;
            }
            av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
362 363 364
            ret = scan_file(avctx, vst, ast, i);
            if (ret < 0) {
                av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
365
                ff_format_io_close(avctx, &mlv->pb[i]);
366 367
                continue;
            }
368 369 370 371 372 373 374 375 376
        }
        av_free(filename);
    }

    if (vst)
        vst->duration = vst->nb_index_entries;
    if (ast)
        ast->duration = ast->nb_index_entries;

377 378 379 380 381
    if ((vst && !vst->nb_index_entries) || (ast && !ast->nb_index_entries)) {
        av_log(avctx, AV_LOG_ERROR, "no index entries found\n");
        return AVERROR_INVALIDDATA;
    }

382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416
    if (vst && ast)
        avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET);
    else if (vst)
        avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
    else if (ast)
        avio_seek(pb, ast->index_entries[0].pos, SEEK_SET);

    return 0;
}

static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
{
    MlvContext *mlv = avctx->priv_data;
    AVIOContext *pb;
    AVStream *st = avctx->streams[mlv->stream_index];
    int index, ret;
    unsigned int size, space;

    if (mlv->pts >= st->duration)
        return AVERROR_EOF;

    index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY);
    if (index < 0) {
        av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
        return AVERROR(EIO);
    }

    pb = mlv->pb[st->index_entries[index].size];
    avio_seek(pb, st->index_entries[index].pos, SEEK_SET);

    avio_skip(pb, 4); // blockType
    size = avio_rl32(pb);
    if (size < 16)
        return AVERROR_INVALIDDATA;
    avio_skip(pb, 12); //timestamp, frameNumber
417
    if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
418 419 420 421 422 423
        avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
    space = avio_rl32(pb);
    avio_skip(pb, space);

    if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
        ret = AVERROR_PATCHWELCOME;
424 425
    } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
        ret = av_get_packet(pb, pkt, (st->codecpar->width * st->codecpar->height * st->codecpar->bits_per_coded_sample + 7) >> 3);
426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452
    } else { // AVMEDIA_TYPE_AUDIO
        if (space > UINT_MAX - 24 || size < (24 + space))
            return AVERROR_INVALIDDATA;
        ret = av_get_packet(pb, pkt, size - (24 + space));
    }

    if (ret < 0)
        return ret;

    pkt->stream_index = mlv->stream_index;
    pkt->pts = mlv->pts;

    mlv->stream_index++;
    if (mlv->stream_index == avctx->nb_streams) {
        mlv->stream_index = 0;
        mlv->pts++;
    }
    return 0;
}

static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
{
    MlvContext *mlv = avctx->priv_data;

    if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
        return AVERROR(ENOSYS);

James Almer's avatar
James Almer committed
453
    if (!(avctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
454 455 456 457 458 459 460 461 462
        return AVERROR(EIO);

    mlv->pts = timestamp;
    return 0;
}

static int read_close(AVFormatContext *s)
{
    MlvContext *mlv = s->priv_data;
463 464 465
    int i;
    for (i = 0; i < 100; i++)
        if (mlv->pb[i])
466
            ff_format_io_close(s, &mlv->pb[i]);
467 468 469 470 471 472 473 474 475 476 477 478 479
    return 0;
}

AVInputFormat ff_mlv_demuxer = {
    .name           = "mlv",
    .long_name      = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
    .priv_data_size = sizeof(MlvContext),
    .read_probe     = probe,
    .read_header    = read_header,
    .read_packet    = read_packet,
    .read_close     = read_close,
    .read_seek      = read_seek,
};