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Allow normal files to get !tags.m3u tags from virtual .txtp

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bnnm 2019-09-21 20:50:05 +02:00
parent 97c090886f
commit 3377da8d9e
1 changed files with 39 additions and 11 deletions
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50
src/plugins.c
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@ -11,6 +11,7 @@ struct VGMSTREAM_TAGS {
char val[VGMSTREAM_TAGS_LINE_MAX];
/* file to find tags for */
int targetname_len;
char targetname[VGMSTREAM_TAGS_LINE_MAX];
/* path of targetname */
char targetpath[VGMSTREAM_TAGS_LINE_MAX];
@ -59,17 +60,21 @@ void vgmstream_tags_close(VGMSTREAM_TAGS *tags) {
free(tags);
}
/* Tags are divided in two: "global" @TAGS and "file" %TAGS for target filename. To extract both
* we find the filename's tag "section": (other_filename) ..(#tag section).. (target_filename).
* When a new "other_filename" is found that offset is marked as section_start, and when target_filename
* is found it's marked as section_end. Then we can begin extracting tags within that section, until
* all tags are exhausted. Global tags are extracted while searching, so they always go first, and
* also meaning any tags after the section is found are ignored. */
/* Find next tag and return 1 if found.
*
* Tags can be "global" @TAGS, "command" $TAGS, and "file" %TAGS for a target filename.
* To extract tags we must find either global tags, or the filename's tag "section"
* where tags apply: (# @TAGS ) .. (other_filename) ..(# %TAGS section).. (target_filename).
* When a new "other_filename" is found that offset is marked as section_start, and when
* target_filename is found it's marked as section_end. Then we can begin extracting tags
* within that section, until all tags are exhausted. Global tags are extracted as found,
* so they always go first, also meaning any tags after file's section are ignored.
* Command tags have special meanings and are output after all section tags. */
int vgmstream_tags_next_tag(VGMSTREAM_TAGS* tags, STREAMFILE* tagfile) {
off_t file_size = get_streamfile_size(tagfile);
char currentname[VGMSTREAM_TAGS_LINE_MAX] = {0};
char line[VGMSTREAM_TAGS_LINE_MAX] = {0};
int ok, bytes_read, line_done;
int ok, bytes_read, line_done, n1,n2;
if (!tags)
return 0;
@ -92,7 +97,7 @@ int vgmstream_tags_next_tag(VGMSTREAM_TAGS* tags, STREAMFILE* tagfile) {
/* read lines */
while (tags->offset <= file_size) {
/* no more tags to extract */
/* after section: no more tags to extract */
if (tags->section_found && tags->offset >= tags->section_end) {
/* write extra tags after all regular tags */
@ -163,10 +168,32 @@ int vgmstream_tags_next_tag(VGMSTREAM_TAGS* tags, STREAMFILE* tagfile) {
continue; /* next line */
}
/* find possible filename and section start/end */
ok = sscanf(line, " %[^\r\n] ", currentname);
/* find possible filename and section start/end
* (.m3u seem to allow filenames with whitespaces before, make sure to trim) */
ok = sscanf(line, " %n%[^\r\n]%n ", &n1, currentname, &n2);
if (ok == 1) {
if (strcasecmp(tags->targetname,currentname) == 0) { /* looks ok even for UTF-8 */
int currentname_len = n2 - n1;
int filename_found = 0;
/* we want to find file with the same name (case insensitive), OR a virtual .txtp with
* the filename inside (so 'file.adx' gets tags from 'file.adx#i.txtp', reading
* tags even if we don't open !tags.m3u with virtual .txtp directly) */
/* strcasecmp works ok even for UTF-8 */
if (currentname_len >= tags->targetname_len && /* starts with targetname */
strncasecmp(currentname, tags->targetname, tags->targetname_len) == 0) {
if (currentname_len == tags->targetname_len) { /* exact match */
filename_found = 1;
}
else if (vgmstream_is_virtual_filename(currentname)) { /* ends with .txth */
char c = currentname[tags->targetname_len];
/* tell apart the unlikely case of having both 'bgm01.ad.txtp' and 'bgm01.adp.txtp' */
filename_found = (c==' ' || c == '.' || c == '#');
}
}
if (filename_found) {
/* section ok, start would be set before this (or be 0) */
tags->section_end = tags->offset;
tags->section_found = 1;
@ -223,6 +250,7 @@ void vgmstream_tags_reset(VGMSTREAM_TAGS* tags, const char* target_filename) {
tags->targetpath[0] = '\0';
strcpy(tags->targetname, target_filename);
}
tags->targetname_len = strlen(tags->targetname);
}
void vgmstream_mixing_enable(VGMSTREAM* vgmstream, int32_t max_sample_count, int *input_channels, int *output_channels) {