MythTV: mxf.c Source File

00001 /*
00002  * MXF demuxer.
00003  * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 /*
00023  * References
00024  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
00025  * SMPTE 377M MXF File Format Specifications
00026  * SMPTE 378M Operational Pattern 1a
00027  * SMPTE 379M MXF Generic Container
00028  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
00029  * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
00030  * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
00031  *
00032  * Principle
00033  * Search for Track numbers which will identify essence element KLV packets.
00034  * Search for SourcePackage which define tracks which contains Track numbers.
00035  * Material Package contains tracks with reference to SourcePackage tracks.
00036  * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
00037  * Assign Descriptors to correct Tracks.
00038  *
00039  * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
00040  * Metadata parsing resolves Strong References to objects.
00041  *
00042  * Simple demuxer, only OP1A supported and some files might not work at all.
00043  * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
00044  */
00045 
00046 //#define DEBUG
00047 
00048 #include "avformat.h"
00049 #include "aes.h"
00050 #include "bytestream.h"
00051 
00052 typedef uint8_t UID[16];
00053 
00054 enum MXFMetadataSetType {
00055     AnyType,
00056     MaterialPackage,
00057     SourcePackage,
00058     SourceClip,
00059     TimecodeComponent,
00060     Sequence,
00061     MultipleDescriptor,
00062     Descriptor,
00063     Track,
00064     CryptoContext,
00065 };
00066 
00067 typedef struct {
00068     UID uid;
00069     enum MXFMetadataSetType type;
00070     UID context_uid;
00071     UID source_container_ul;
00072 } MXFCryptoContext;
00073 
00074 typedef struct {
00075     UID uid;
00076     enum MXFMetadataSetType type;
00077     UID source_package_uid;
00078     UID data_definition_ul;
00079     int64_t duration;
00080     int64_t start_position;
00081     int source_track_id;
00082 } MXFStructuralComponent;
00083 
00084 typedef struct {
00085     UID uid;
00086     enum MXFMetadataSetType type;
00087     UID data_definition_ul;
00088     UID *structural_components_refs;
00089     int structural_components_count;
00090     int64_t duration;
00091 } MXFSequence;
00092 
00093 typedef struct {
00094     UID uid;
00095     enum MXFMetadataSetType type;
00096     MXFSequence *sequence; /* mandatory, and only one */
00097     UID sequence_ref;
00098     int track_id;
00099     uint8_t track_number[4];
00100     AVRational edit_rate;
00101 } MXFTrack;
00102 
00103 typedef struct {
00104     UID uid;
00105     enum MXFMetadataSetType type;
00106     UID essence_container_ul;
00107     UID essence_codec_ul;
00108     AVRational sample_rate;
00109     AVRational aspect_ratio;
00110     int width;
00111     int height;
00112     int channels;
00113     int bits_per_sample;
00114     UID *sub_descriptors_refs;
00115     int sub_descriptors_count;
00116     int linked_track_id;
00117     uint8_t *extradata;
00118     int extradata_size;
00119 } MXFDescriptor;
00120 
00121 typedef struct {
00122     UID uid;
00123     enum MXFMetadataSetType type;
00124     UID package_uid;
00125     UID *tracks_refs;
00126     int tracks_count;
00127     MXFDescriptor *descriptor; /* only one */
00128     UID descriptor_ref;
00129 } MXFPackage;
00130 
00131 typedef struct {
00132     UID uid;
00133     enum MXFMetadataSetType type;
00134 } MXFMetadataSet;
00135 
00136 typedef struct {
00137     UID *packages_refs;
00138     int packages_count;
00139     MXFMetadataSet **metadata_sets;
00140     int metadata_sets_count;
00141     AVFormatContext *fc;
00142     struct AVAES *aesc;
00143 } MXFContext;
00144 
00145 typedef struct {
00146     UID key;
00147     offset_t offset;
00148     uint64_t length;
00149 } KLVPacket;
00150 
00151 enum MXFWrappingScheme {
00152     Frame,
00153     Clip,
00154 };
00155 
00156 typedef struct {
00157     UID uid;
00158     enum CodecID id;
00159     enum MXFWrappingScheme wrapping;
00160 } MXFCodecUL;
00161 
00162 typedef struct {
00163     UID uid;
00164     enum CodecType type;
00165 } MXFDataDefinitionUL;
00166 
00167 typedef struct {
00168     const UID key;
00169     int (*read)();
00170     int ctx_size;
00171     enum MXFMetadataSetType type;
00172 } MXFMetadataReadTableEntry;
00173 
00174 /* partial keys to match */
00175 static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
00176 static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
00177 static const uint8_t mxf_klv_key[]                         = { 0x06,0x0e,0x2b,0x34 };
00178 /* complete keys to match */
00179 static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
00180 static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
00181 
00182 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
00183 
00184 #define PRINT_KEY(pc, s, x) dprintf(pc, "%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
00185                              (x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5], (x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14], (x)[15])
00186 
00187 static int64_t klv_decode_ber_length(ByteIOContext *pb)
00188 {
00189     uint64_t size = get_byte(pb);
00190     if (size & 0x80) { /* long form */
00191         int bytes_num = size & 0x7f;
00192         /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
00193         if (bytes_num > 8)
00194             return -1;
00195         size = 0;
00196         while (bytes_num--)
00197             size = size << 8 | get_byte(pb);
00198     }
00199     return size;
00200 }
00201 
00202 static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
00203 {
00204     int i, b;
00205     for (i = 0; i < size && !url_feof(pb); i++) {
00206         b = get_byte(pb);
00207         if (b == key[0])
00208             i = 0;
00209         else if (b != key[i])
00210             i = -1;
00211     }
00212     return i == size;
00213 }
00214 
00215 static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
00216 {
00217     if (!mxf_read_sync(pb, mxf_klv_key, 4))
00218         return -1;
00219     klv->offset = url_ftell(pb) - 4;
00220     memcpy(klv->key, mxf_klv_key, 4);
00221     get_buffer(pb, klv->key + 4, 12);
00222     klv->length = klv_decode_ber_length(pb);
00223     return klv->length == -1 ? -1 : 0;
00224 }
00225 
00226 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
00227 {
00228     int i;
00229 
00230     for (i = 0; i < s->nb_streams; i++) {
00231         MXFTrack *track = s->streams[i]->priv_data;
00232         /* SMPTE 379M 7.3 */
00233         if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
00234             return i;
00235     }
00236     /* return 0 if only one stream, for OP Atom files with 0 as track number */
00237     return s->nb_streams == 1 ? 0 : -1;
00238 }
00239 
00240 /* XXX: use AVBitStreamFilter */
00241 static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
00242 {
00243     uint8_t buffer[61444];
00244     uint8_t *buf_ptr, *end_ptr, *data_ptr;
00245     int i;
00246 
00247     if (length > 61444) /* worst case PAL 1920 samples 8 channels */
00248         return -1;
00249     get_buffer(pb, buffer, length);
00250     av_new_packet(pkt, length);
00251     data_ptr = pkt->data;
00252     end_ptr = buffer + length;
00253     buf_ptr = buffer + 4; /* skip SMPTE 331M header */
00254     for (; buf_ptr < end_ptr; ) {
00255         for (i = 0; i < st->codec->channels; i++) {
00256             uint32_t sample = bytestream_get_le32(&buf_ptr);
00257             if (st->codec->bits_per_sample == 24)
00258                 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
00259             else
00260                 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
00261         }
00262         buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
00263     }
00264     pkt->size = data_ptr - pkt->data;
00265     return 0;
00266 }
00267 
00268 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
00269 {
00270     static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
00271     MXFContext *mxf = s->priv_data;
00272     ByteIOContext *pb = &s->pb;
00273     offset_t end = url_ftell(pb) + klv->length;
00274     uint64_t size;
00275     uint64_t orig_size;
00276     uint64_t plaintext_size;
00277     uint8_t ivec[16];
00278     uint8_t tmpbuf[16];
00279     int index;
00280 
00281     if (!mxf->aesc && s->key && s->keylen == 16) {
00282         mxf->aesc = av_malloc(av_aes_size);
00283         av_aes_init(mxf->aesc, s->key, 128, 1);
00284     }
00285     // crypto context
00286     url_fskip(pb, klv_decode_ber_length(pb));
00287     // plaintext offset
00288     klv_decode_ber_length(pb);
00289     plaintext_size = get_be64(pb);
00290     // source klv key
00291     klv_decode_ber_length(pb);
00292     get_buffer(pb, klv->key, 16);
00293     if (!IS_KLV_KEY(klv, mxf_essence_element_key))
00294         return -1;
00295     index = mxf_get_stream_index(s, klv);
00296     if (index < 0)
00297         return -1;
00298     // source size
00299     klv_decode_ber_length(pb);
00300     orig_size = get_be64(pb);
00301     if (orig_size < plaintext_size)
00302         return -1;
00303     // enc. code
00304     size = klv_decode_ber_length(pb);
00305     if (size < 32 || size - 32 < orig_size)
00306         return -1;
00307     get_buffer(pb, ivec, 16);
00308     get_buffer(pb, tmpbuf, 16);
00309     if (mxf->aesc)
00310         av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
00311     if (memcmp(tmpbuf, checkv, 16))
00312         av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
00313     size -= 32;
00314     av_get_packet(pb, pkt, size);
00315     size -= plaintext_size;
00316     if (mxf->aesc)
00317         av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
00318                      &pkt->data[plaintext_size], size >> 4, ivec, 1);
00319     pkt->size = orig_size;
00320     pkt->stream_index = index;
00321     url_fskip(pb, end - url_ftell(pb));
00322     return 0;
00323 }
00324 
00325 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
00326 {
00327     KLVPacket klv;
00328 
00329     while (!url_feof(&s->pb)) {
00330         if (klv_read_packet(&klv, &s->pb) < 0)
00331             return -1;
00332 #ifdef DEBUG
00333         PRINT_KEY(s, "read packet", klv.key);
00334 #endif
00335         if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
00336             int res = mxf_decrypt_triplet(s, pkt, &klv);
00337             if (res < 0) {
00338                 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
00339                 return -1;
00340             }
00341             return 0;
00342         }
00343         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
00344             int index = mxf_get_stream_index(s, &klv);
00345             if (index < 0) {
00346                 av_log(s, AV_LOG_ERROR, "error getting stream index\n");
00347                 url_fskip(&s->pb, klv.length);
00348                 return -1;
00349             }
00350             /* check for 8 channels AES3 element */
00351             if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
00352                 if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
00353                     av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
00354                     return -1;
00355                 }
00356             } else
00357                 av_get_packet(&s->pb, pkt, klv.length);
00358             pkt->stream_index = index;
00359             pkt->pos = klv.offset;
00360             return 0;
00361         } else
00362             url_fskip(&s->pb, klv.length);
00363     }
00364     return AVERROR(EIO);
00365 }
00366 
00367 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
00368 {
00369     mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
00370     mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
00371     mxf->metadata_sets_count++;
00372     return 0;
00373 }
00374 
00375 static int mxf_read_metadata_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag)
00376 {
00377     switch(tag) {
00378     case 0xFFFE:
00379         get_buffer(pb, cryptocontext->context_uid, 16);
00380         break;
00381     case 0xFFFD:
00382         get_buffer(pb, cryptocontext->source_container_ul, 16);
00383         break;
00384     }
00385     return 0;
00386 }
00387 
00388 static int mxf_read_metadata_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
00389 {
00390     switch (tag) {
00391     case 0x1901:
00392         mxf->packages_count = get_be32(pb);
00393         if (mxf->packages_count >= UINT_MAX / sizeof(UID))
00394             return -1;
00395         mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
00396         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
00397         get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
00398         break;
00399     }
00400     return 0;
00401 }
00402 
00403 static int mxf_read_metadata_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
00404 {
00405     switch(tag) {
00406     case 0x0202:
00407         source_clip->duration = get_be64(pb);
00408         break;
00409     case 0x1201:
00410         source_clip->start_position = get_be64(pb);
00411         break;
00412     case 0x1101:
00413         /* UMID, only get last 16 bytes */
00414         url_fskip(pb, 16);
00415         get_buffer(pb, source_clip->source_package_uid, 16);
00416         break;
00417     case 0x1102:
00418         source_clip->source_track_id = get_be32(pb);
00419         break;
00420     }
00421     return 0;
00422 }
00423 
00424 static int mxf_read_metadata_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
00425 {
00426     switch(tag) {
00427     case 0x4403:
00428         package->tracks_count = get_be32(pb);
00429         if (package->tracks_count >= UINT_MAX / sizeof(UID))
00430             return -1;
00431         package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
00432         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
00433         get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
00434         break;
00435     }
00436     return 0;
00437 }
00438 
00439 static int mxf_read_metadata_track(MXFTrack *track, ByteIOContext *pb, int tag)
00440 {
00441     switch(tag) {
00442     case 0x4801:
00443         track->track_id = get_be32(pb);
00444         break;
00445     case 0x4804:
00446         get_buffer(pb, track->track_number, 4);
00447         break;
00448     case 0x4B01:
00449         track->edit_rate.den = get_be32(pb);
00450         track->edit_rate.num = get_be32(pb);
00451         break;
00452     case 0x4803:
00453         get_buffer(pb, track->sequence_ref, 16);
00454         break;
00455     }
00456     return 0;
00457 }
00458 
00459 static int mxf_read_metadata_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
00460 {
00461     switch(tag) {
00462     case 0x0202:
00463         sequence->duration = get_be64(pb);
00464         break;
00465     case 0x0201:
00466         get_buffer(pb, sequence->data_definition_ul, 16);
00467         break;
00468     case 0x1001:
00469         sequence->structural_components_count = get_be32(pb);
00470         if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
00471             return -1;
00472         sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
00473         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
00474         get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
00475         break;
00476     }
00477     return 0;
00478 }
00479 
00480 static int mxf_read_metadata_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
00481 {
00482     switch(tag) {
00483     case 0x4403:
00484         package->tracks_count = get_be32(pb);
00485         if (package->tracks_count >= UINT_MAX / sizeof(UID))
00486             return -1;
00487         package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
00488         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
00489         get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
00490         break;
00491     case 0x4401:
00492         /* UMID, only get last 16 bytes */
00493         url_fskip(pb, 16);
00494         get_buffer(pb, package->package_uid, 16);
00495         break;
00496     case 0x4701:
00497         get_buffer(pb, package->descriptor_ref, 16);
00498         break;
00499     }
00500     return 0;
00501 }
00502 
00503 static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
00504 {
00505     int code;
00506 
00507     do {
00508         code = get_byte(pb);
00509         dprintf(NULL, "pixel layout: code 0x%x\n", code);
00510         switch (code) {
00511         case 0x52: /* R */
00512             descriptor->bits_per_sample += get_byte(pb);
00513             break;
00514         case 0x47: /* G */
00515             descriptor->bits_per_sample += get_byte(pb);
00516             break;
00517         case 0x42: /* B */
00518             descriptor->bits_per_sample += get_byte(pb);
00519             break;
00520         default:
00521             get_byte(pb);
00522         }
00523     } while (code != 0); /* SMPTE 377M E.2.46 */
00524 }
00525 
00526 static int mxf_read_metadata_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
00527 {
00528     switch(tag) {
00529     case 0x3F01:
00530         descriptor->sub_descriptors_count = get_be32(pb);
00531         if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
00532             return -1;
00533         descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
00534         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
00535         get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
00536         break;
00537     case 0x3004:
00538         get_buffer(pb, descriptor->essence_container_ul, 16);
00539         break;
00540     case 0x3006:
00541         descriptor->linked_track_id = get_be32(pb);
00542         break;
00543     case 0x3201: /* PictureEssenceCoding */
00544         get_buffer(pb, descriptor->essence_codec_ul, 16);
00545         break;
00546     case 0x3203:
00547         descriptor->width = get_be32(pb);
00548         break;
00549     case 0x3202:
00550         descriptor->height = get_be32(pb);
00551         break;
00552     case 0x320E:
00553         descriptor->aspect_ratio.num = get_be32(pb);
00554         descriptor->aspect_ratio.den = get_be32(pb);
00555         break;
00556     case 0x3D03:
00557         descriptor->sample_rate.num = get_be32(pb);
00558         descriptor->sample_rate.den = get_be32(pb);
00559         break;
00560     case 0x3D06: /* SoundEssenceCompression */
00561         get_buffer(pb, descriptor->essence_codec_ul, 16);
00562         break;
00563     case 0x3D07:
00564         descriptor->channels = get_be32(pb);
00565         break;
00566     case 0x3D01:
00567         descriptor->bits_per_sample = get_be32(pb);
00568         break;
00569     case 0x3401:
00570         mxf_read_metadata_pixel_layout(pb, descriptor);
00571         break;
00572     case 0x8201: /* Private tag used by SONY C0023S01.mxf */
00573         descriptor->extradata = av_malloc(size);
00574         descriptor->extradata_size = size;
00575         get_buffer(pb, descriptor->extradata, size);
00576         break;
00577     }
00578     return 0;
00579 }
00580 
00581 /* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
00582 static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
00583     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
00584     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
00585     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
00586     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
00587 };
00588 
00589 static const MXFCodecUL mxf_codec_uls[] = {
00590     /* PictureEssenceCoding */
00591     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
00592 
00593     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
00594     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 40Mbps PAL */
00595     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
00596     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x06 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps NTSC */
00597     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x04 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 40Mbps NTSC */
00598     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x02 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps NTSC */
00599 
00600     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
00601     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
00602 
00603     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
00604 
00605     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
00606     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
00607 
00608     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
00609     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
00610 
00611     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
00612     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
00613     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
00614 
00615     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
00616 
00617     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
00618     /* SoundEssenceCompression */
00619     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
00620     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
00621     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 },  CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */
00622     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame }, /* XDCAM Proxy C0023S01.mxf */
00623     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
00624     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
00625   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
00626     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
00627 };
00628 
00629 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
00630     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
00631     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */
00632     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
00633     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
00634 };
00635 
00636 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
00637     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
00638     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
00639     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
00640     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
00641     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 },        CODEC_ID_MP2,  Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
00642     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },  CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */
00643     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },  CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 40Mbps PAL Extended Template */
00644     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },  CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 50Mbps PAL Extended Template */
00645     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x06,0x01 },  CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 30Mbps NTSC Extended Template */
00646     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x04,0x01 },  CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 40Mbps NTSC Extended Template */
00647     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x02,0x01 },  CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 50Mbps NTSC Extended Template */
00648     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
00649 };
00650 
00651 /*
00652  * Match an uid independently of the version byte and up to len common bytes
00653  * Returns: boolean
00654  */
00655 static int mxf_match_uid(const UID key, const UID uid, int len)
00656 {
00657     int i;
00658     for (i = 0; i < len; i++) {
00659         if (i != 7 && key[i] != uid[i])
00660             return 0;
00661     }
00662     return 1;
00663 }
00664 
00665 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
00666 {
00667     while (uls->id != CODEC_ID_NONE) {
00668         if(mxf_match_uid(uls->uid, *uid, 16))
00669             break;
00670         uls++;
00671     }
00672     return uls;
00673 }
00674 
00675 static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
00676 {
00677     while (uls->type != CODEC_TYPE_DATA) {
00678         if(mxf_match_uid(uls->uid, *uid, 16))
00679             break;
00680         uls++;
00681     }
00682     return uls->type;
00683 }
00684 
00685 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
00686 {
00687     int i;
00688 
00689     if (!strong_ref)
00690         return NULL;
00691     for (i = 0; i < mxf->metadata_sets_count; i++) {
00692         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
00693             (type == AnyType || mxf->metadata_sets[i]->type == type)) {
00694             return mxf->metadata_sets[i];
00695         }
00696     }
00697     return NULL;
00698 }
00699 
00700 static int mxf_parse_structural_metadata(MXFContext *mxf)
00701 {
00702     MXFPackage *material_package = NULL;
00703     MXFPackage *temp_package = NULL;
00704     int i, j, k;
00705 
00706     dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
00707     /* TODO: handle multiple material packages (OP3x) */
00708     for (i = 0; i < mxf->packages_count; i++) {
00709         material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
00710         if (material_package) break;
00711     }
00712     if (!material_package) {
00713         av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
00714         return -1;
00715     }
00716 
00717     for (i = 0; i < material_package->tracks_count; i++) {
00718         MXFPackage *source_package = NULL;
00719         MXFTrack *material_track = NULL;
00720         MXFTrack *source_track = NULL;
00721         MXFTrack *temp_track = NULL;
00722         MXFDescriptor *descriptor = NULL;
00723         MXFStructuralComponent *component = NULL;
00724         UID *essence_container_ul = NULL;
00725         const MXFCodecUL *codec_ul = NULL;
00726         const MXFCodecUL *container_ul = NULL;
00727         AVStream *st;
00728 
00729         if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
00730             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
00731             continue;
00732         }
00733 
00734         if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
00735             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
00736             return -1;
00737         }
00738 
00739         /* TODO: handle multiple source clips */
00740         for (j = 0; j < material_track->sequence->structural_components_count; j++) {
00741             /* TODO: handle timecode component */
00742             component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
00743             if (!component)
00744                 continue;
00745 
00746             for (k = 0; k < mxf->packages_count; k++) {
00747                 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
00748                 if (!temp_package)
00749                     continue;
00750                 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
00751                     source_package = temp_package;
00752                     break;
00753                 }
00754             }
00755             if (!source_package) {
00756                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
00757                 break;
00758             }
00759             for (k = 0; k < source_package->tracks_count; k++) {
00760                 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
00761                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
00762                     return -1;
00763                 }
00764                 if (temp_track->track_id == component->source_track_id) {
00765                     source_track = temp_track;
00766                     break;
00767                 }
00768             }
00769             if (!source_track) {
00770                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
00771                 break;
00772             }
00773         }
00774         if (!source_track)
00775             continue;
00776 
00777         st = av_new_stream(mxf->fc, source_track->track_id);
00778         st->priv_data = source_track;
00779         st->duration = component->duration;
00780         if (st->duration == -1)
00781             st->duration = AV_NOPTS_VALUE;
00782         st->start_time = component->start_position;
00783         av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
00784 
00785         if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
00786             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
00787             return -1;
00788         }
00789 
00790 #ifdef DEBUG
00791         PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
00792 #endif
00793         st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
00794 
00795         source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
00796         if (source_package->descriptor) {
00797             if (source_package->descriptor->type == MultipleDescriptor) {
00798                 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
00799                     MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
00800 
00801                     if (!sub_descriptor) {
00802                         av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
00803                         continue;
00804                     }
00805                     if (sub_descriptor->linked_track_id == source_track->track_id) {
00806                         descriptor = sub_descriptor;
00807                         break;
00808                     }
00809                 }
00810             } else if (source_package->descriptor->type == Descriptor)
00811                 descriptor = source_package->descriptor;
00812         }
00813         if (!descriptor) {
00814             av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
00815             continue;
00816         }
00817 #ifdef DEBUG
00818         PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
00819         PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
00820 #endif
00821         essence_container_ul = &descriptor->essence_container_ul;
00822         /* HACK: replacing the original key with mxf_encrypted_essence_container
00823          * is not allowed according to s429-6, try to find correct information anyway */
00824         if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
00825             av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
00826             for (k = 0; k < mxf->metadata_sets_count; k++) {
00827                 MXFMetadataSet *metadata = mxf->metadata_sets[k];
00828                 if (metadata->type == CryptoContext) {
00829                     essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
00830                     break;
00831                 }
00832             }
00833         }
00834         /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
00835         codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
00836         st->codec->codec_id = codec_ul->id;
00837         if (descriptor->extradata) {
00838             st->codec->extradata = descriptor->extradata;
00839             st->codec->extradata_size = descriptor->extradata_size;
00840         }
00841         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
00842             container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
00843             if (st->codec->codec_id == CODEC_ID_NONE)
00844                 st->codec->codec_id = container_ul->id;
00845             st->codec->width = descriptor->width;
00846             st->codec->height = descriptor->height;
00847             st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
00848             st->need_parsing = AVSTREAM_PARSE_HEADERS;
00849         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
00850             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
00851             if (st->codec->codec_id == CODEC_ID_NONE)
00852                 st->codec->codec_id = container_ul->id;
00853             st->codec->channels = descriptor->channels;
00854             st->codec->bits_per_sample = descriptor->bits_per_sample;
00855             st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
00856             /* TODO: implement CODEC_ID_RAWAUDIO */
00857             if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
00858                 if (descriptor->bits_per_sample == 24)
00859                     st->codec->codec_id = CODEC_ID_PCM_S24LE;
00860                 else if (descriptor->bits_per_sample == 32)
00861                     st->codec->codec_id = CODEC_ID_PCM_S32LE;
00862             } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
00863                 if (descriptor->bits_per_sample == 24)
00864                     st->codec->codec_id = CODEC_ID_PCM_S24BE;
00865                 else if (descriptor->bits_per_sample == 32)
00866                     st->codec->codec_id = CODEC_ID_PCM_S32BE;
00867             } else if (st->codec->codec_id == CODEC_ID_MP2) {
00868                 st->need_parsing = AVSTREAM_PARSE_FULL;
00869             }
00870         }
00871         if (container_ul && container_ul->wrapping == Clip) {
00872             dprintf(mxf->fc, "stream %d: clip wrapped essence\n", st->index);
00873             st->need_parsing = AVSTREAM_PARSE_FULL;
00874         }
00875     }
00876     return 0;
00877 }
00878 
00879 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
00880     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage, 0, AnyType },
00881     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package, sizeof(MXFPackage), SourcePackage },
00882     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package, sizeof(MXFPackage), MaterialPackage },
00883     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence, sizeof(MXFSequence), Sequence },
00884     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip, sizeof(MXFStructuralComponent), SourceClip },
00885     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
00886     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
00887     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
00888     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
00889     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
00890     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
00891     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
00892     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Static Track */
00893     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Generic Track */
00894     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_metadata_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
00895     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
00896 };
00897 
00898 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
00899 {
00900     ByteIOContext *pb = &mxf->fc->pb;
00901     MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
00902     uint64_t klv_end= url_ftell(pb) + klv->length;
00903 
00904     while (url_ftell(pb) + 4 < klv_end) {
00905         int tag = get_be16(pb);
00906         int size = get_be16(pb); /* KLV specified by 0x53 */
00907         uint64_t next= url_ftell(pb) + size;
00908 
00909         if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
00910             av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
00911             continue;
00912         }
00913         if(ctx_size && tag == 0x3C0A)
00914             get_buffer(pb, ctx->uid, 16);
00915         else
00916             read_child(ctx, pb, tag, size);
00917 
00918         url_fseek(pb, next, SEEK_SET);
00919     }
00920     if (ctx_size) ctx->type = type;
00921     return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
00922 }
00923 
00924 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
00925 {
00926     MXFContext *mxf = s->priv_data;
00927     KLVPacket klv;
00928 
00929     if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
00930         av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
00931         return -1;
00932     }
00933     url_fseek(&s->pb, -14, SEEK_CUR);
00934     mxf->fc = s;
00935     while (!url_feof(&s->pb)) {
00936         const MXFMetadataReadTableEntry *metadata;
00937 
00938         if (klv_read_packet(&klv, &s->pb) < 0)
00939             return -1;
00940 #ifdef DEBUG
00941         PRINT_KEY(s, "read header", klv.key);
00942 #endif
00943         if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
00944             IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
00945             /* FIXME avoid seek */
00946             url_fseek(&s->pb, klv.offset, SEEK_SET);
00947             break;
00948         }
00949 
00950         for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
00951             if (IS_KLV_KEY(klv.key, metadata->key)) {
00952                 if (mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
00953                     av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
00954                     return -1;
00955                 }
00956                 break;
00957             }
00958         }
00959         if (!metadata->read)
00960             url_fskip(&s->pb, klv.length);
00961     }
00962     return mxf_parse_structural_metadata(mxf);
00963 }
00964 
00965 static int mxf_read_close(AVFormatContext *s)
00966 {
00967     MXFContext *mxf = s->priv_data;
00968     int i;
00969 
00970     av_freep(&mxf->packages_refs);
00971     for (i = 0; i < mxf->metadata_sets_count; i++) {
00972         switch (mxf->metadata_sets[i]->type) {
00973         case MultipleDescriptor:
00974             av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
00975             break;
00976         case Sequence:
00977             av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
00978             break;
00979         case SourcePackage:
00980         case MaterialPackage:
00981             av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
00982             break;
00983         default:
00984             break;
00985         }
00986         av_freep(&mxf->metadata_sets[i]);
00987     }
00988     av_freep(&mxf->metadata_sets);
00989     av_freep(&mxf->aesc);
00990     return 0;
00991 }
00992 
00993 static int mxf_probe(AVProbeData *p) {
00994     uint8_t *bufp = p->buf;
00995     uint8_t *end = p->buf + p->buf_size;
00996 
00997     if (p->buf_size < sizeof(mxf_header_partition_pack_key))
00998         return 0;
00999 
01000     /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
01001     end -= sizeof(mxf_header_partition_pack_key);
01002     for (; bufp < end; bufp++) {
01003         if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
01004             return AVPROBE_SCORE_MAX;
01005     }
01006     return 0;
01007 }
01008 
01009 /* rudimentary byte seek */
01010 /* XXX: use MXF Index */
01011 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
01012 {
01013     AVStream *st = s->streams[stream_index];
01014     int64_t seconds;
01015 
01016     if (!s->bit_rate)
01017         return -1;
01018     if (sample_time < 0)
01019         sample_time = 0;
01020     seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
01021     url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
01022     av_update_cur_dts(s, st, sample_time);
01023     return 0;
01024 }
01025 
01026 AVInputFormat mxf_demuxer = {
01027     "mxf",
01028     "MXF format",
01029     sizeof(MXFContext),
01030     mxf_probe,
01031     mxf_read_header,
01032     mxf_read_packet,
01033     mxf_read_close,
01034     mxf_read_seek,
01035 };