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compute index byte count in mxf_write_partition

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Originally committed as revision 17125 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-02-10 08:46:04 +00:00
parent c1425a14f1
commit 7524f46e21
1 changed files with 14 additions and 12 deletions
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26
libavformat/mxfenc.c
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@ -1001,12 +1001,21 @@ static void mxf_write_klv_fill(AVFormatContext *s)
}
static void mxf_write_partition(AVFormatContext *s, int bodysid,
int indexsid, unsigned index_byte_count,
int indexsid,
const uint8_t *key, int write_metadata)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t header_byte_count_offset;
unsigned index_byte_count = 0;
if (mxf->edit_units_count) {
index_byte_count = 109 + (s->nb_streams+1)*6 +
mxf->edit_units_count*(11+mxf->slice_count*4);
// add encoded ber length
index_byte_count += 16 + klv_ber_length(index_byte_count);
index_byte_count += klv_fill_size(index_byte_count);
}
// write klv
put_buffer(pb, key, 16);
@ -1029,7 +1038,7 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
// indexTable
put_be64(pb, index_byte_count); // indexByteCount
put_be32(pb, indexsid); // indexSID
put_be32(pb, index_byte_count ? indexsid : 0); // indexSID
put_be64(pb, 0); // bodyOffset
put_be32(pb, bodysid); // bodySID
@ -1320,7 +1329,7 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
}
if (!mxf->header_written) {
mxf_write_partition(s, 1, 0, 0, header_open_partition_key, 1);
mxf_write_partition(s, 1, 0, header_open_partition_key, 1);
mxf->header_written = 1;
}
@ -1369,17 +1378,10 @@ static int mxf_write_footer(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
unsigned index_byte_count =
109 + (s->nb_streams+1)*6 +
mxf->edit_units_count*(11+mxf->slice_count*4);
// add encoded ber length
index_byte_count += 16 + klv_ber_length(index_byte_count);
index_byte_count += klv_fill_size(index_byte_count);
mxf_write_klv_fill(s);
mxf->footer_partition_offset = url_ftell(pb);
mxf_write_partition(s, 0, 2, index_byte_count, footer_partition_key, 0);
mxf_write_partition(s, 0, 2, footer_partition_key, 0);
mxf_write_klv_fill(s);
mxf_write_index_table_segment(s);
@ -1389,7 +1391,7 @@ static int mxf_write_footer(AVFormatContext *s)
if (!url_is_streamed(s->pb)) {
url_fseek(pb, 0, SEEK_SET);
mxf_write_partition(s, 1, 0, 0, header_closed_partition_key, 1);
mxf_write_partition(s, 1, 0, header_closed_partition_key, 1);
}
ff_audio_interleave_close(s);