[FFmpeg-soc] [soc]: r3174 - mxf/mxfdec.c
spyfeng
subversion at mplayerhq.hu
Tue Aug 12 04:18:39 CEST 2008
Author: spyfeng
Date: Tue Aug 12 04:18:39 2008
New Revision: 3174
Log:
add mxfdec.c for modifing and extracting common code from mxfenc.c/mxfdec.c
Added:
mxf/mxfdec.c
Added: mxf/mxfdec.c
==============================================================================
--- (empty file)
+++ mxf/mxfdec.c Tue Aug 12 04:18:39 2008
@@ -0,0 +1,1074 @@
+/*
+ * MXF demuxer.
+ * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog 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
+ */
+
+/*
+ * References
+ * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
+ * SMPTE 377M MXF File Format Specifications
+ * SMPTE 378M Operational Pattern 1a
+ * SMPTE 379M MXF Generic Container
+ * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
+ * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
+ * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
+ *
+ * Principle
+ * Search for Track numbers which will identify essence element KLV packets.
+ * Search for SourcePackage which define tracks which contains Track numbers.
+ * Material Package contains tracks with reference to SourcePackage tracks.
+ * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
+ * Assign Descriptors to correct Tracks.
+ *
+ * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
+ * Metadata parsing resolves Strong References to objects.
+ *
+ * Simple demuxer, only OP1A supported and some files might not work at all.
+ * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
+ */
+
+//#define DEBUG
+
+#include "libavutil/aes.h"
+#include "libavcodec/bytestream.h"
+#include "avformat.h"
+
+typedef uint8_t UID[16];
+
+enum MXFMetadataSetType {
+ AnyType,
+ MaterialPackage,
+ SourcePackage,
+ SourceClip,
+ TimecodeComponent,
+ Sequence,
+ MultipleDescriptor,
+ Descriptor,
+ Track,
+ CryptoContext,
+};
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+ UID source_container_ul;
+} MXFCryptoContext;
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+ UID source_package_uid;
+ UID data_definition_ul;
+ int64_t duration;
+ int64_t start_position;
+ int source_track_id;
+} MXFStructuralComponent;
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+ UID data_definition_ul;
+ UID *structural_components_refs;
+ int structural_components_count;
+ int64_t duration;
+} MXFSequence;
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+ MXFSequence *sequence; /* mandatory, and only one */
+ UID sequence_ref;
+ int track_id;
+ uint8_t track_number[4];
+ AVRational edit_rate;
+} MXFTrack;
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+ UID essence_container_ul;
+ UID essence_codec_ul;
+ AVRational sample_rate;
+ AVRational aspect_ratio;
+ int width;
+ int height;
+ int channels;
+ int bits_per_sample;
+ UID *sub_descriptors_refs;
+ int sub_descriptors_count;
+ int linked_track_id;
+ uint8_t *extradata;
+ int extradata_size;
+} MXFDescriptor;
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+ UID package_uid;
+ UID *tracks_refs;
+ int tracks_count;
+ MXFDescriptor *descriptor; /* only one */
+ UID descriptor_ref;
+} MXFPackage;
+
+typedef struct {
+ UID uid;
+ enum MXFMetadataSetType type;
+} MXFMetadataSet;
+
+typedef struct {
+ UID *packages_refs;
+ int packages_count;
+ MXFMetadataSet **metadata_sets;
+ int metadata_sets_count;
+ AVFormatContext *fc;
+ struct AVAES *aesc;
+ uint8_t *local_tags;
+ int local_tags_count;
+} MXFContext;
+
+typedef struct {
+ UID key;
+ offset_t offset;
+ uint64_t length;
+} KLVPacket;
+
+enum MXFWrappingScheme {
+ Frame,
+ Clip,
+};
+
+typedef struct {
+ UID uid;
+ unsigned matching_len;
+ enum CodecID id;
+} MXFCodecUL;
+
+typedef struct {
+ UID uid;
+ enum CodecType type;
+} MXFDataDefinitionUL;
+
+typedef struct {
+ const UID key;
+ int (*read)();
+ int ctx_size;
+ enum MXFMetadataSetType type;
+} MXFMetadataReadTableEntry;
+
+/* partial keys to match */
+static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
+static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
+static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
+/* complete keys to match */
+static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
+static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
+static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
+static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
+
+#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
+
+#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, \
+ (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])
+
+static int64_t klv_decode_ber_length(ByteIOContext *pb)
+{
+ uint64_t size = get_byte(pb);
+ if (size & 0x80) { /* long form */
+ int bytes_num = size & 0x7f;
+ /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
+ if (bytes_num > 8)
+ return -1;
+ size = 0;
+ while (bytes_num--)
+ size = size << 8 | get_byte(pb);
+ }
+ return size;
+}
+
+static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
+{
+ int i, b;
+ for (i = 0; i < size && !url_feof(pb); i++) {
+ b = get_byte(pb);
+ if (b == key[0])
+ i = 0;
+ else if (b != key[i])
+ i = -1;
+ }
+ return i == size;
+}
+
+static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
+{
+ if (!mxf_read_sync(pb, mxf_klv_key, 4))
+ return -1;
+ klv->offset = url_ftell(pb) - 4;
+ memcpy(klv->key, mxf_klv_key, 4);
+ get_buffer(pb, klv->key + 4, 12);
+ klv->length = klv_decode_ber_length(pb);
+ return klv->length == -1 ? -1 : 0;
+}
+
+static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
+{
+ int i;
+
+ for (i = 0; i < s->nb_streams; i++) {
+ MXFTrack *track = s->streams[i]->priv_data;
+ /* SMPTE 379M 7.3 */
+ if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
+ return i;
+ }
+ /* return 0 if only one stream, for OP Atom files with 0 as track number */
+ return s->nb_streams == 1 ? 0 : -1;
+}
+
+/* XXX: use AVBitStreamFilter */
+static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
+{
+ uint8_t buffer[61444];
+ const uint8_t *buf_ptr, *end_ptr;
+ uint8_t *data_ptr;
+ int i;
+
+ if (length > 61444) /* worst case PAL 1920 samples 8 channels */
+ return -1;
+ get_buffer(pb, buffer, length);
+ av_new_packet(pkt, length);
+ data_ptr = pkt->data;
+ end_ptr = buffer + length;
+ buf_ptr = buffer + 4; /* skip SMPTE 331M header */
+ for (; buf_ptr < end_ptr; ) {
+ for (i = 0; i < st->codec->channels; i++) {
+ uint32_t sample = bytestream_get_le32(&buf_ptr);
+ if (st->codec->bits_per_sample == 24)
+ bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
+ else
+ bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
+ }
+ buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
+ }
+ pkt->size = data_ptr - pkt->data;
+ return 0;
+}
+
+static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
+{
+ static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
+ MXFContext *mxf = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ offset_t end = url_ftell(pb) + klv->length;
+ uint64_t size;
+ uint64_t orig_size;
+ uint64_t plaintext_size;
+ uint8_t ivec[16];
+ uint8_t tmpbuf[16];
+ int index;
+
+ if (!mxf->aesc && s->key && s->keylen == 16) {
+ mxf->aesc = av_malloc(av_aes_size);
+ if (!mxf->aesc)
+ return -1;
+ av_aes_init(mxf->aesc, s->key, 128, 1);
+ }
+ // crypto context
+ url_fskip(pb, klv_decode_ber_length(pb));
+ // plaintext offset
+ klv_decode_ber_length(pb);
+ plaintext_size = get_be64(pb);
+ // source klv key
+ klv_decode_ber_length(pb);
+ get_buffer(pb, klv->key, 16);
+ if (!IS_KLV_KEY(klv, mxf_essence_element_key))
+ return -1;
+ index = mxf_get_stream_index(s, klv);
+ if (index < 0)
+ return -1;
+ // source size
+ klv_decode_ber_length(pb);
+ orig_size = get_be64(pb);
+ if (orig_size < plaintext_size)
+ return -1;
+ // enc. code
+ size = klv_decode_ber_length(pb);
+ if (size < 32 || size - 32 < orig_size)
+ return -1;
+ get_buffer(pb, ivec, 16);
+ get_buffer(pb, tmpbuf, 16);
+ if (mxf->aesc)
+ av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
+ if (memcmp(tmpbuf, checkv, 16))
+ av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
+ size -= 32;
+ av_get_packet(pb, pkt, size);
+ size -= plaintext_size;
+ if (mxf->aesc)
+ av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
+ &pkt->data[plaintext_size], size >> 4, ivec, 1);
+ pkt->size = orig_size;
+ pkt->stream_index = index;
+ url_fskip(pb, end - url_ftell(pb));
+ return 0;
+}
+
+static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ KLVPacket klv;
+
+ while (!url_feof(s->pb)) {
+ if (klv_read_packet(&klv, s->pb) < 0)
+ return -1;
+#ifdef DEBUG
+ PRINT_KEY(s, "read packet", klv.key);
+#endif
+ if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
+ int res = mxf_decrypt_triplet(s, pkt, &klv);
+ if (res < 0) {
+ av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
+ return -1;
+ }
+ return 0;
+ }
+ if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
+ int index = mxf_get_stream_index(s, &klv);
+ if (index < 0) {
+ av_log(s, AV_LOG_ERROR, "error getting stream index %x\n", AV_RB32(klv.key+12));
+ goto skip;
+ }
+ if (s->streams[index]->discard == AVDISCARD_ALL)
+ goto skip;
+ /* check for 8 channels AES3 element */
+ if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
+ if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
+ av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
+ return -1;
+ }
+ } else
+ av_get_packet(s->pb, pkt, klv.length);
+ pkt->stream_index = index;
+ pkt->pos = klv.offset;
+ return 0;
+ } else
+ skip:
+ url_fskip(s->pb, klv.length);
+ }
+ return AVERROR(EIO);
+}
+
+static int mxf_read_primer_pack(MXFContext *mxf)
+{
+ ByteIOContext *pb = mxf->fc->pb;
+ int item_num = get_be32(pb);
+ int item_len = get_be32(pb);
+
+ if (item_len != 18) {
+ av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
+ return -1;
+ }
+ if (item_num > UINT_MAX / item_len)
+ return -1;
+ mxf->local_tags_count = item_num;
+ mxf->local_tags = av_malloc(item_num*item_len);
+ if (!mxf->local_tags)
+ return -1;
+ get_buffer(pb, mxf->local_tags, item_num*item_len);
+ return 0;
+}
+
+static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
+{
+ mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
+ if (!mxf->metadata_sets)
+ return -1;
+ mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
+ mxf->metadata_sets_count++;
+ return 0;
+}
+
+static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
+{
+ if (size != 16)
+ return -1;
+ if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
+ get_buffer(pb, cryptocontext->source_container_ul, 16);
+ return 0;
+}
+
+static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
+{
+ switch (tag) {
+ case 0x1901:
+ mxf->packages_count = get_be32(pb);
+ if (mxf->packages_count >= UINT_MAX / sizeof(UID))
+ return -1;
+ mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
+ if (!mxf->packages_refs)
+ return -1;
+ url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
+ get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
+ break;
+ }
+ return 0;
+}
+
+static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
+{
+ switch(tag) {
+ case 0x0202:
+ source_clip->duration = get_be64(pb);
+ break;
+ case 0x1201:
+ source_clip->start_position = get_be64(pb);
+ break;
+ case 0x1101:
+ /* UMID, only get last 16 bytes */
+ url_fskip(pb, 16);
+ get_buffer(pb, source_clip->source_package_uid, 16);
+ break;
+ case 0x1102:
+ source_clip->source_track_id = get_be32(pb);
+ break;
+ }
+ return 0;
+}
+
+static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
+{
+ switch(tag) {
+ case 0x4403:
+ package->tracks_count = get_be32(pb);
+ if (package->tracks_count >= UINT_MAX / sizeof(UID))
+ return -1;
+ package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
+ if (!package->tracks_refs)
+ return -1;
+ url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
+ get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
+ break;
+ }
+ return 0;
+}
+
+static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
+{
+ switch(tag) {
+ case 0x4801:
+ track->track_id = get_be32(pb);
+ break;
+ case 0x4804:
+ get_buffer(pb, track->track_number, 4);
+ break;
+ case 0x4B01:
+ track->edit_rate.den = get_be32(pb);
+ track->edit_rate.num = get_be32(pb);
+ break;
+ case 0x4803:
+ get_buffer(pb, track->sequence_ref, 16);
+ break;
+ }
+ return 0;
+}
+
+static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
+{
+ switch(tag) {
+ case 0x0202:
+ sequence->duration = get_be64(pb);
+ break;
+ case 0x0201:
+ get_buffer(pb, sequence->data_definition_ul, 16);
+ break;
+ case 0x1001:
+ sequence->structural_components_count = get_be32(pb);
+ if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
+ return -1;
+ sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
+ if (!sequence->structural_components_refs)
+ return -1;
+ url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
+ get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
+ break;
+ }
+ return 0;
+}
+
+static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
+{
+ switch(tag) {
+ case 0x4403:
+ package->tracks_count = get_be32(pb);
+ if (package->tracks_count >= UINT_MAX / sizeof(UID))
+ return -1;
+ package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
+ if (!package->tracks_refs)
+ return -1;
+ url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
+ get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
+ break;
+ case 0x4401:
+ /* UMID, only get last 16 bytes */
+ url_fskip(pb, 16);
+ get_buffer(pb, package->package_uid, 16);
+ break;
+ case 0x4701:
+ get_buffer(pb, package->descriptor_ref, 16);
+ break;
+ }
+ return 0;
+}
+
+static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
+{
+ int code;
+
+ do {
+ code = get_byte(pb);
+ dprintf(NULL, "pixel layout: code 0x%x\n", code);
+ switch (code) {
+ case 0x52: /* R */
+ descriptor->bits_per_sample += get_byte(pb);
+ break;
+ case 0x47: /* G */
+ descriptor->bits_per_sample += get_byte(pb);
+ break;
+ case 0x42: /* B */
+ descriptor->bits_per_sample += get_byte(pb);
+ break;
+ default:
+ get_byte(pb);
+ }
+ } while (code != 0); /* SMPTE 377M E.2.46 */
+}
+
+static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
+{
+ switch(tag) {
+ case 0x3F01:
+ descriptor->sub_descriptors_count = get_be32(pb);
+ if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
+ return -1;
+ descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
+ if (!descriptor->sub_descriptors_refs)
+ return -1;
+ url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
+ get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
+ break;
+ case 0x3004:
+ get_buffer(pb, descriptor->essence_container_ul, 16);
+ break;
+ case 0x3006:
+ descriptor->linked_track_id = get_be32(pb);
+ break;
+ case 0x3201: /* PictureEssenceCoding */
+ get_buffer(pb, descriptor->essence_codec_ul, 16);
+ break;
+ case 0x3203:
+ descriptor->width = get_be32(pb);
+ break;
+ case 0x3202:
+ descriptor->height = get_be32(pb);
+ break;
+ case 0x320E:
+ descriptor->aspect_ratio.num = get_be32(pb);
+ descriptor->aspect_ratio.den = get_be32(pb);
+ break;
+ case 0x3D03:
+ descriptor->sample_rate.num = get_be32(pb);
+ descriptor->sample_rate.den = get_be32(pb);
+ break;
+ case 0x3D06: /* SoundEssenceCompression */
+ get_buffer(pb, descriptor->essence_codec_ul, 16);
+ break;
+ case 0x3D07:
+ descriptor->channels = get_be32(pb);
+ break;
+ case 0x3D01:
+ descriptor->bits_per_sample = get_be32(pb);
+ break;
+ case 0x3401:
+ mxf_read_pixel_layout(pb, descriptor);
+ break;
+ default:
+ /* Private uid used by SONY C0023S01.mxf */
+ if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
+ descriptor->extradata = av_malloc(size);
+ if (!descriptor->extradata)
+ return -1;
+ descriptor->extradata_size = size;
+ get_buffer(pb, descriptor->extradata, size);
+ }
+ break;
+ }
+ return 0;
+}
+
+/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
+static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_TYPE_DATA },
+};
+
+static const MXFCodecUL mxf_codec_uls[] = {
+ /* PictureEssenceCoding */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MP at ML Long GoP */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* D-10 50Mbps PAL */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MP at HL Long GoP */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* 422P at HL I-Frame */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 }, 14, CODEC_ID_MPEG4 }, /* XDCAM proxy_pal030926.mxf */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, 13, CODEC_ID_DVVIDEO }, /* DV25 IEC PAL */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, CODEC_ID_RAWVIDEO }, /* Uncompressed */
+ /* SoundEssenceCompression */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16LE }, /* Uncompressed */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16LE },
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16BE }, /* From Omneon MXF file */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, 15, CODEC_ID_PCM_ALAW }, /* XDCAM Proxy C0023S01.mxf */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 }, 15, CODEC_ID_AC3 },
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 }, 15, CODEC_ID_MP2 }, /* MP2 or MP3 */
+ //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 }, 15, CODEC_ID_DOLBY_E }, /* Dolby-E */
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
+};
+
+static const MXFCodecUL mxf_picture_essence_container_uls[] = {
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
+};
+
+static const MXFCodecUL mxf_sound_essence_container_uls[] = {
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
+};
+
+/*
+ * Match an uid independently of the version byte and up to len common bytes
+ * Returns: boolean
+ */
+static int mxf_match_uid(const UID key, const UID uid, int len)
+{
+ int i;
+ for (i = 0; i < len; i++) {
+ if (i != 7 && key[i] != uid[i])
+ return 0;
+ }
+ return 1;
+}
+
+static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
+{
+ while (uls->id != CODEC_ID_NONE) {
+ if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
+ break;
+ uls++;
+ }
+ return uls;
+}
+
+static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
+{
+ while (uls->type != CODEC_TYPE_DATA) {
+ if(mxf_match_uid(uls->uid, *uid, 16))
+ break;
+ uls++;
+ }
+ return uls->type;
+}
+
+static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
+{
+ int i;
+
+ if (!strong_ref)
+ return NULL;
+ for (i = 0; i < mxf->metadata_sets_count; i++) {
+ if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
+ (type == AnyType || mxf->metadata_sets[i]->type == type)) {
+ return mxf->metadata_sets[i];
+ }
+ }
+ return NULL;
+}
+
+static int mxf_parse_structural_metadata(MXFContext *mxf)
+{
+ MXFPackage *material_package = NULL;
+ MXFPackage *temp_package = NULL;
+ int i, j, k;
+
+ dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
+ /* TODO: handle multiple material packages (OP3x) */
+ for (i = 0; i < mxf->packages_count; i++) {
+ material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
+ if (material_package) break;
+ }
+ if (!material_package) {
+ av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
+ return -1;
+ }
+
+ for (i = 0; i < material_package->tracks_count; i++) {
+ MXFPackage *source_package = NULL;
+ MXFTrack *material_track = NULL;
+ MXFTrack *source_track = NULL;
+ MXFTrack *temp_track = NULL;
+ MXFDescriptor *descriptor = NULL;
+ MXFStructuralComponent *component = NULL;
+ UID *essence_container_ul = NULL;
+ const MXFCodecUL *codec_ul = NULL;
+ const MXFCodecUL *container_ul = NULL;
+ AVStream *st;
+
+ if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
+ av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
+ continue;
+ }
+
+ if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
+ av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
+ return -1;
+ }
+
+ /* TODO: handle multiple source clips */
+ for (j = 0; j < material_track->sequence->structural_components_count; j++) {
+ /* TODO: handle timecode component */
+ component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
+ if (!component)
+ continue;
+
+ for (k = 0; k < mxf->packages_count; k++) {
+ temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
+ if (!temp_package)
+ continue;
+ if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
+ source_package = temp_package;
+ break;
+ }
+ }
+ if (!source_package) {
+ av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
+ break;
+ }
+ for (k = 0; k < source_package->tracks_count; k++) {
+ if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
+ av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
+ return -1;
+ }
+ if (temp_track->track_id == component->source_track_id) {
+ source_track = temp_track;
+ break;
+ }
+ }
+ if (!source_track) {
+ av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
+ break;
+ }
+ }
+ if (!source_track)
+ continue;
+
+ st = av_new_stream(mxf->fc, source_track->track_id);
+ if (!st) {
+ av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
+ return -1;
+ }
+ st->priv_data = source_track;
+ st->duration = component->duration;
+ if (st->duration == -1)
+ st->duration = AV_NOPTS_VALUE;
+ st->start_time = component->start_position;
+ av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
+
+ if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
+ av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
+ return -1;
+ }
+
+#ifdef DEBUG
+ PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
+#endif
+ st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
+
+ source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
+ if (source_package->descriptor) {
+ if (source_package->descriptor->type == MultipleDescriptor) {
+ for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
+ MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
+
+ if (!sub_descriptor) {
+ av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
+ continue;
+ }
+ if (sub_descriptor->linked_track_id == source_track->track_id) {
+ descriptor = sub_descriptor;
+ break;
+ }
+ }
+ } else if (source_package->descriptor->type == Descriptor)
+ descriptor = source_package->descriptor;
+ }
+ if (!descriptor) {
+ av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
+ continue;
+ }
+#ifdef DEBUG
+ PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
+ PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
+#endif
+ essence_container_ul = &descriptor->essence_container_ul;
+ /* HACK: replacing the original key with mxf_encrypted_essence_container
+ * is not allowed according to s429-6, try to find correct information anyway */
+ if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
+ av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
+ for (k = 0; k < mxf->metadata_sets_count; k++) {
+ MXFMetadataSet *metadata = mxf->metadata_sets[k];
+ if (metadata->type == CryptoContext) {
+ essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
+ break;
+ }
+ }
+ }
+ /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
+ codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
+ st->codec->codec_id = codec_ul->id;
+ if (descriptor->extradata) {
+ st->codec->extradata = descriptor->extradata;
+ st->codec->extradata_size = descriptor->extradata_size;
+ }
+ if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
+ container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
+ if (st->codec->codec_id == CODEC_ID_NONE)
+ st->codec->codec_id = container_ul->id;
+ st->codec->width = descriptor->width;
+ st->codec->height = descriptor->height;
+ st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
+ st->need_parsing = AVSTREAM_PARSE_HEADERS;
+ } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
+ container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
+ if (st->codec->codec_id == CODEC_ID_NONE)
+ st->codec->codec_id = container_ul->id;
+ st->codec->channels = descriptor->channels;
+ st->codec->bits_per_sample = descriptor->bits_per_sample;
+ st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
+ /* TODO: implement CODEC_ID_RAWAUDIO */
+ if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
+ if (descriptor->bits_per_sample == 24)
+ st->codec->codec_id = CODEC_ID_PCM_S24LE;
+ else if (descriptor->bits_per_sample == 32)
+ st->codec->codec_id = CODEC_ID_PCM_S32LE;
+ } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
+ if (descriptor->bits_per_sample == 24)
+ st->codec->codec_id = CODEC_ID_PCM_S24BE;
+ else if (descriptor->bits_per_sample == 32)
+ st->codec->codec_id = CODEC_ID_PCM_S32BE;
+ } else if (st->codec->codec_id == CODEC_ID_MP2) {
+ st->need_parsing = AVSTREAM_PARSE_FULL;
+ }
+ }
+ if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
+ av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
+ st->need_parsing = AVSTREAM_PARSE_FULL;
+ }
+ }
+ return 0;
+}
+
+static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
+ { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
+};
+
+static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
+{
+ ByteIOContext *pb = mxf->fc->pb;
+ MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
+ uint64_t klv_end = url_ftell(pb) + klv->length;
+
+ if (!ctx)
+ return -1;
+ while (url_ftell(pb) + 4 < klv_end) {
+ int tag = get_be16(pb);
+ int size = get_be16(pb); /* KLV specified by 0x53 */
+ uint64_t next = url_ftell(pb) + size;
+ UID uid = {0};
+
+ if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
+ av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
+ continue;
+ }
+ if (tag > 0x7FFF) { /* dynamic tag */
+ int i;
+ for (i = 0; i < mxf->local_tags_count; i++) {
+ int local_tag = AV_RB16(mxf->local_tags+i*18);
+ if (local_tag == tag) {
+ memcpy(uid, mxf->local_tags+i*18+2, 16);
+ dprintf(mxf->fc, "local tag 0x%04X\n", local_tag);
+#ifdef DEBUG
+ PRINT_KEY(mxf->fc, "uid", uid);
+#endif
+ }
+ }
+ }
+ if (ctx_size && tag == 0x3C0A)
+ get_buffer(pb, ctx->uid, 16);
+ else if (read_child(ctx, pb, tag, size, uid) < 0)
+ return -1;
+
+ url_fseek(pb, next, SEEK_SET);
+ }
+ if (ctx_size) ctx->type = type;
+ return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
+}
+
+static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+ MXFContext *mxf = s->priv_data;
+ KLVPacket klv;
+
+ if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
+ av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
+ return -1;
+ }
+ url_fseek(s->pb, -14, SEEK_CUR);
+ mxf->fc = s;
+ while (!url_feof(s->pb)) {
+ const MXFMetadataReadTableEntry *metadata;
+
+ if (klv_read_packet(&klv, s->pb) < 0)
+ return -1;
+#ifdef DEBUG
+ PRINT_KEY(s, "read header", klv.key);
+#endif
+ if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
+ IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
+ /* FIXME avoid seek */
+ url_fseek(s->pb, klv.offset, SEEK_SET);
+ break;
+ }
+
+ for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
+ if (IS_KLV_KEY(klv.key, metadata->key)) {
+ int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
+ if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
+ av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
+ return -1;
+ }
+ break;
+ }
+ }
+ if (!metadata->read)
+ url_fskip(s->pb, klv.length);
+ }
+ return mxf_parse_structural_metadata(mxf);
+}
+
+static int mxf_read_close(AVFormatContext *s)
+{
+ MXFContext *mxf = s->priv_data;
+ int i;
+
+ av_freep(&mxf->packages_refs);
+ for (i = 0; i < mxf->metadata_sets_count; i++) {
+ switch (mxf->metadata_sets[i]->type) {
+ case MultipleDescriptor:
+ av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
+ break;
+ case Sequence:
+ av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
+ break;
+ case SourcePackage:
+ case MaterialPackage:
+ av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
+ break;
+ case Track:
+ mxf->metadata_sets[i] = NULL; /* will be freed later */
+ break;
+ default:
+ break;
+ }
+ av_freep(&mxf->metadata_sets[i]);
+ }
+ av_freep(&mxf->metadata_sets);
+ av_freep(&mxf->aesc);
+ av_freep(&mxf->local_tags);
+ return 0;
+}
+
+static int mxf_probe(AVProbeData *p) {
+ uint8_t *bufp = p->buf;
+ uint8_t *end = p->buf + p->buf_size;
+
+ if (p->buf_size < sizeof(mxf_header_partition_pack_key))
+ return 0;
+
+ /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
+ end -= sizeof(mxf_header_partition_pack_key);
+ for (; bufp < end; bufp++) {
+ if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
+ return AVPROBE_SCORE_MAX;
+ }
+ return 0;
+}
+
+/* rudimentary byte seek */
+/* XXX: use MXF Index */
+static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
+{
+ AVStream *st = s->streams[stream_index];
+ int64_t seconds;
+
+ if (!s->bit_rate)
+ return -1;
+ if (sample_time < 0)
+ sample_time = 0;
+ seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
+ url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
+ av_update_cur_dts(s, st, sample_time);
+ return 0;
+}
+
+AVInputFormat mxf_demuxer = {
+ "mxf",
+ NULL_IF_CONFIG_SMALL("Material eXchange Format"),
+ sizeof(MXFContext),
+ mxf_probe,
+ mxf_read_header,
+ mxf_read_packet,
+ mxf_read_close,
+ mxf_read_seek,
+};
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