bool get_asf_metadata(int fd, struct mp3entry* id3)
{
int res;
asf_object_t obj;
asf_waveformatex_t wfx;
wfx.audiostream = -1;
res = asf_parse_header(fd, id3, &wfx);
if (res < 0) {
DEBUGF("ASF: parsing error - %d\n",res);
return false;
}
if (wfx.audiostream == -1) {
DEBUGF("ASF: No WMA streams found\n");
return false;
}
asf_read_object_header(&obj, fd);
if (!asf_guid_match(&obj.guid, &asf_guid_data)) {
DEBUGF("ASF: No data object found\n");
return false;
}
/* Store the current file position - no need to parse the header
again in the codec. The +26 skips the rest of the data object
header.
*/
id3->first_frame_offset = lseek(fd, 0, SEEK_CUR) + 26;
id3->filesize = filesize(fd);
/* We copy the wfx struct to the MP3 TOC field in the id3 struct so
the codec doesn't need to parse the header object again */
memcpy(id3->toc, &wfx, sizeof(wfx));
return true;
}
int
asf_init(asf_file_t *file)
{
int tmp;
if (!file)
return ASF_ERROR_INTERNAL;
tmp = asf_parse_header(file);
if (tmp < 0) {
debug_printf("error parsing header: %d", tmp);
return tmp;
}
file->position += tmp;
file->data_position = file->position;
tmp = asf_parse_data(file);
if (tmp < 0) {
debug_printf("error parsing data object: %d", tmp);
return tmp;
}
file->position += tmp;
if (file->flags & ASF_FLAG_SEEKABLE && file->iostream.seek) {
int64_t seek_position;
file->index_position = file->data_position +
file->data->size;
seek_position = file->iostream.seek(file->iostream.opaque,
file->index_position);
/* if first seek fails, we can try to recover and just ignore seeking */
if (seek_position >= 0) {
while (seek_position == file->index_position &&
file->index_position < file->file_size && !file->index) {
tmp = asf_parse_index(file);
if (tmp < 0) {
debug_printf("Error finding index object! %d", tmp);
break;
}
/* The object read was something else than index */
if (!file->index)
file->index_position += tmp;
seek_position = file->iostream.seek(file->iostream.opaque,
file->index_position);
}
if (!file->index) {
debug_printf("Couldn't find an index object");
file->index_position = 0;
}
seek_position = file->iostream.seek(file->iostream.opaque,
file->data->packets_position);
if (seek_position != file->data->packets_position) {
/* Couldn't seek back to packets position, this is fatal! */
return ASF_ERROR_SEEK;
}
}
}
for (tmp = 0; tmp < ASF_MAX_STREAMS; tmp++) {
if (file->streams[tmp].type != ASF_STREAM_TYPE_NONE) {
debug_printf("stream %d of type %d found!", tmp, file->streams[tmp].type);
}
}
return 0;
}
