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compute essence containers in mxf_write_header, this simplifies the code 

Originally committed as revision 15072 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2008-08-31 00:23:38 +00:00
parent a2f55f22b3
commit c18d208ae2
1 changed files with 26 additions and 34 deletions
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60
libavformat/mxfenc.c
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@ -48,6 +48,8 @@ typedef struct MXFContext {
int64_t header_byte_count_offset;
int64_t header_footer_partition_offset;
int essence_container_count;
uint8_t essence_containers_indices[sizeof(ff_mxf_essence_container_uls)/
sizeof(*ff_mxf_essence_container_uls)];
} MXFContext;
typedef struct {
@ -182,14 +184,16 @@ static int klv_encode_ber_length(ByteIOContext *pb, uint64_t len)
return 0;
}
static const UID *mxf_get_essence_container_ul(enum CodecID type)
/*
* Get essence container ul and return its index position
*/
static const UID *mxf_get_essence_container_ul(enum CodecID type, int *index)
{
const MXFCodecUL *uls = ff_mxf_essence_container_uls;
while (uls->id != CODEC_ID_NONE) {
if (uls->id == type)
for (*index = 0; *index < sizeof(ff_mxf_essence_container_uls)/sizeof(ff_mxf_essence_container_uls[0]); (*index)++)
if (ff_mxf_essence_container_uls[*index].id == type)
return &uls->uid;
uls++;
}
*index = -1;
return NULL;
}
@ -248,37 +252,19 @@ static const MXFDataDefinitionUL *mxf_get_data_definition_ul(enum CodecType type
static int mxf_write_essence_container_refs(AVFormatContext *s, int write)
{
MXFContext *c = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *st;
int i, count = 0, j = 0;
const MXFCodecUL *codec_ul;
int essence_container_ul_sign[sizeof(ff_mxf_essence_container_uls) / sizeof(MXFCodecUL)] = { 0 };
for (codec_ul = ff_mxf_essence_container_uls; codec_ul->id; codec_ul++) {
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
if (st->codec->codec_id == codec_ul->id) {
essence_container_ul_sign[count] = j;
count++;
break;
}
}
j++;
// considering WAV/AES3 frame wrapped, when get the first CODEC_ID_PCM_S16LE, break;
// this is a temporary method, when we can get more information, modify this.
if (codec_ul->id == CODEC_ID_PCM_S16LE)
break;
}
int i;
if (write) {
mxf_write_refs_count(pb, count);
for (i = 0; i < count; i++)
put_buffer(pb, ff_mxf_essence_container_uls[essence_container_ul_sign[i]].uid, 16);
av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", count);
for (i = 0; i < count; i++)
PRINT_KEY(s, "essence container ul:\n", ff_mxf_essence_container_uls[essence_container_ul_sign[i]].uid);
mxf_write_refs_count(pb, c->essence_container_count);
for (i = 0; i < c->essence_container_count; i++)
put_buffer(pb, ff_mxf_essence_container_uls[c->essence_containers_indices[i]].uid, 16);
av_log(s,AV_LOG_DEBUG, "essence container count:%d\n", c->essence_container_count);
for (i = 0; i < c->essence_container_count; i++)
PRINT_KEY(s, "essence container ul:\n", ff_mxf_essence_container_uls[c->essence_containers_indices[i]].uid);
}
return count;
return c->essence_container_count;
}
static void mxf_write_preface(AVFormatContext *s)
@ -756,7 +742,9 @@ static int mux_write_header(AVFormatContext *s)
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t header_metadata_start, offset_now;
int i;
int i, index;
uint8_t present[sizeof(ff_mxf_essence_container_uls)/
sizeof(*ff_mxf_essence_container_uls)] = {0};
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
@ -769,12 +757,16 @@ static int mux_write_header(AVFormatContext *s)
av_set_pts_info(st, 64, 1, st->codec->time_base.den);
else if (st->codec->codec_type == CODEC_TYPE_AUDIO)
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
sc->essence_container_ul = mxf_get_essence_container_ul(st->codec->codec_id);
sc->essence_container_ul = mxf_get_essence_container_ul(st->codec->codec_id, &index);
if (!sc->essence_container_ul) {
av_log(s, AV_LOG_ERROR, "track %d: could not find essence container ul, "
"codec not currently supported in container\n", i);
return -1;
}
if (!present[index]) {
mxf->essence_containers_indices[mxf->essence_container_count++] = index;
present[index] = 1;
}
}
mxf_write_partition(s, 0, 1, header_partition_key);