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Ok-ed parts from patch by zhentan feng. 

Originally committed as revision 14827 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Zhentan Feng 2008-08-18 18:11:00 +00:00 committed by Michael Niedermayer
parent c69968b4fe
commit e48891bd9b
1 changed files with 74 additions and 9 deletions
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83
libavformat/mxfenc.c
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@ -31,9 +31,55 @@
//#define DEBUG
#include "mxf.h"
typedef struct {
int local_tag;
UID uid;
} MXFLocalTagPair;
static const uint8_t uuid_base[] = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
static const uint8_t umid_base[] = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x01,0x01,0x01,0x01,0x0F,0x00,0x13,0x00,0x00,0x00 };
/**
* complete key for operation pattern, partitions, and primer pack
*/
static const uint8_t op1a_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
static const uint8_t header_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }; // ClosedComplete
static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
static const uint8_t primer_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
static void mxf_write_uuid(ByteIOContext *pb, enum CodecID type, int value)
{
put_buffer(pb, uuid_base, 12);
put_be16(pb, type);
put_be16(pb, value);
}
static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
{
// Determine the best BER size
int size;
if (len < 128) {
//short form
put_byte(pb, len);
return 1;
}
size = (av_log2(len) >> 3) + 1;
// long form
put_byte(pb, 0x80 + size);
while(size) {
size --;
put_byte(pb, len >> 8 * size & 0xff);
}
return 0;
}
static const MXFCodecUL *mxf_get_essence_container_ul(enum CodecID type)
{
const MXFCodecUL *uls = mxf_essence_container_uls;
const MXFCodecUL *uls = ff_mxf_essence_container_uls;
while (uls->id != CODEC_ID_NONE) {
if (uls->id == type)
break;
@ -42,29 +88,48 @@ static const MXFCodecUL *mxf_get_essence_container_ul(enum CodecID type)
return uls;
}
static int mxf_write_primer_pack(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
int local_tag_number, i = 0;
local_tag_number = sizeof(mxf_local_tag_batch) / sizeof(MXFLocalTagPair);
put_buffer(pb, primer_pack_key, 16);
klv_encode_ber_length(pb, local_tag_number * 18 + 8);
put_be32(pb, local_tag_number); // local_tag num
put_be32(pb, 18); // item size, always 18 according to the specs
for (i = 0; i < local_tag_number; i++) {
put_be16(pb, mxf_local_tag_batch[i].local_tag);
put_buffer(pb, mxf_local_tag_batch[i].uid, 16);
}
return 0;
}
static void mxf_write_local_tag(ByteIOContext *pb, int value_size, int tag)
{
put_be16(pb, tag);
put_be16(pb, value_size);
}
static void mxf_free(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
AVStream *st;
int i;
av_freep(&mxf->reference.identification);
av_freep(mxf->reference.package);
av_freep(&mxf->reference.package);
av_freep(&mxf->reference.content_storage);
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
av_freep(&st->priv_data);
}
av_freep(mxf->reference.sub_desc);
av_freep(&mxf->reference.sub_desc);
av_freep(&mxf->reference.mul_desc);
av_freep(&mxf->essence_container_uls);
}
static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type)
{
const MXFDataDefinitionUL *uls = mxf_data_definition_uls;
const MXFDataDefinitionUL *uls = ff_mxf_data_definition_uls;
while (uls->type != CODEC_TYPE_DATA) {
if (type == uls->type)
break;