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Code Issues Releases Activity

use 512 kag size needed for d10

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Originally committed as revision 17029 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-02-07 02:13:23 +00:00
parent 9d385cfec4
commit 85d0d114d0
1 changed files with 46 additions and 4 deletions
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50
libavformat/mxfenc.c
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@ -42,6 +42,7 @@ static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
static const int PAL_samples_per_frame[] = { 1920, 0 };
#define MXF_INDEX_CLUSTER_SIZE 4096
#define KAG_SIZE 512
typedef struct {
AVFifoBuffer fifo;
@ -140,6 +141,7 @@ static const uint8_t index_table_segment_key[] = { 0x06,0x0E,0x2B,0x34,0x02,
static const uint8_t random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
static const uint8_t header_open_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }; // OpenIncomplete
static const uint8_t header_closed_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }; // ClosedComplete
static const uint8_t klv_fill_key[] = { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x01,0x03,0x01,0x02,0x10,0x01,0x00,0x00,0x00 };
/**
* partial key for header metadata
@ -248,6 +250,14 @@ static void mxf_write_refs_count(ByteIOContext *pb, int ref_count)
put_be32(pb, 16);
}
static int klv_ber_length(uint64_t len)
{
if (len < 128)
return 1;
else
return (av_log2(len) >> 3) + 2;
}
static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
{
// Determine the best BER size
@ -840,6 +850,15 @@ static int mxf_write_header_metadata_sets(AVFormatContext *s)
return 0;
}
static unsigned klv_fill_size(AVFormatContext *s)
{
unsigned pad = KAG_SIZE - (url_ftell(s->pb) & (KAG_SIZE-1));
if (pad < 17) // smallest fill item possible
return pad + KAG_SIZE;
else
return pad & (KAG_SIZE-1);
}
static int mxf_write_index_table_segment(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
@ -963,7 +982,7 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
// write partition value
put_be16(pb, 1); // majorVersion
put_be16(pb, 2); // minorVersion
put_be32(pb, 1); // kagSize
put_be32(pb, KAG_SIZE); // KAGSize
put_be64(pb, url_ftell(pb) - 25); // thisPartition
put_be64(pb, 0); // previousPartition
@ -988,12 +1007,16 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
if (write_metadata) {
// mark the start of the headermetadata and calculate metadata size
int64_t pos, start = url_ftell(s->pb);
unsigned header_byte_count;
mxf_write_primer_pack(s);
mxf_write_header_metadata_sets(s);
pos = url_ftell(s->pb);
header_byte_count = pos - start + klv_fill_size(s);
// update header_byte_count
url_fseek(pb, header_byte_count_offset, SEEK_SET);
put_be64(pb, pos - start);
put_be64(pb, header_byte_count);
url_fseek(pb, pos, SEEK_SET);
}
@ -1209,6 +1232,22 @@ static int mxf_write_header(AVFormatContext *s)
return 0;
}
static void mxf_write_klv_fill(AVFormatContext *s)
{
unsigned pad = klv_fill_size(s);
if (pad) {
put_buffer(s->pb, klv_fill_key, 16);
pad -= 16;
pad -= klv_ber_length(pad);
klv_encode_ber_length(s->pb, pad);
for (; pad > 7; pad -= 8)
put_be64(s->pb, 0);
for (; pad; pad--)
put_byte(s->pb, 0);
assert(!(url_ftell(s->pb) & (KAG_SIZE-1)));
}
}
static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
MXFContext *mxf = s->priv_data;
@ -1238,6 +1277,8 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
mxf->header_written = 1;
}
mxf_write_klv_fill(s);
if (st->index == mxf->edit_unit_start) {
mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
mxf->index_entries[mxf->edit_units_count].slice_offset[st->index] = 0;
@ -1284,8 +1325,9 @@ static int mxf_write_footer(AVFormatContext *s)
mxf->edit_units_count*(11+(s->nb_streams-1)*4);
// add encoded ber length
index_byte_count += 16 +
(index_byte_count < 128 ? 1 : (av_log2(index_byte_count) >> 3) + 2);
index_byte_count += 16 + klv_ber_length(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);