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mpv/demux/demux_cue.c
wm4 26f4f18c06 options: change option macros and all option declarations
Change all OPT_* macros such that they don't define the entire m_option
initializer, and instead expand only to a part of it, which sets certain
fields. This requires changing almost every option declaration, because
they all use these macros. A declaration now always starts with

   {"name", ...

followed by designated initializers only (possibly wrapped in macros).
The OPT_* macros now initialize the .offset and .type fields only,
sometimes also .priv and others.

I think this change makes the option macros less tricky. The old code
had to stuff everything into macro arguments (and attempted to allow
setting arbitrary fields by letting the user pass designated
initializers in the vararg parts). Some of this was made messy due to
C99 and C11 not allowing 0-sized varargs with ',' removal. It's also
possible that this change is pointless, other than cosmetic preferences.

Not too happy about some things. For example, the OPT_CHOICE()
indentation I applied looks a bit ugly.

Much of this change was done with regex search&replace, but some places
required manual editing. In particular, code in "obscure" areas (which I
didn't include in compilation) might be broken now.

In wayland_common.c the author of some option declarations confused the
flags parameter with the default value (though the default value was
also properly set below). I fixed this with this change.
2020-03-18 19:52:01 +01:00

314 lines
9.6 KiB
C

/*
* Original author: Uoti Urpala
*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <dirent.h>
#include <inttypes.h>
#include "osdep/io.h"
#include "mpv_talloc.h"
#include "misc/bstr.h"
#include "misc/charset_conv.h"
#include "common/msg.h"
#include "demux/demux.h"
#include "options/m_config.h"
#include "options/m_option.h"
#include "options/path.h"
#include "common/common.h"
#include "stream/stream.h"
#include "timeline.h"
#include "cue.h"
#define PROBE_SIZE 512
#define OPT_BASE_STRUCT struct demux_cue_opts
struct demux_cue_opts {
char *cue_cp;
};
const struct m_sub_options demux_cue_conf = {
.opts = (const m_option_t[]) {
{"codepage", OPT_STRING(cue_cp)},
{0}
},
.size = sizeof(struct demux_cue_opts),
.defaults = &(const struct demux_cue_opts) {
.cue_cp = "auto"
}
};
struct priv {
struct cue_file *f;
struct demux_cue_opts *opts;
};
static void add_source(struct timeline *tl, struct demuxer *d)
{
MP_TARRAY_APPEND(tl, tl->sources, tl->num_sources, d);
}
static bool try_open(struct timeline *tl, char *filename)
{
struct bstr bfilename = bstr0(filename);
// Avoid trying to open itself or another .cue file. Best would be
// to check the result of demuxer auto-detection, but the demuxer
// API doesn't allow this without opening a full demuxer.
if (bstr_case_endswith(bfilename, bstr0(".cue"))
|| bstrcasecmp(bstr0(tl->demuxer->filename), bfilename) == 0)
return false;
struct demuxer_params p = {
.stream_flags = tl->stream_origin,
};
struct demuxer *d = demux_open_url(filename, &p, tl->cancel, tl->global);
// Since .bin files are raw PCM data with no headers, we have to explicitly
// open them. Also, try to avoid to open files that are most likely not .bin
// files, as that would only play noise. Checking the file extension is
// fragile, but it's about the only way we have.
// TODO: maybe also could check if the .bin file is a multiple of the Audio
// CD sector size (2352 bytes)
if (!d && bstr_case_endswith(bfilename, bstr0(".bin"))) {
MP_WARN(tl, "CUE: Opening as BIN file!\n");
p.force_format = "rawaudio";
d = demux_open_url(filename, &p, tl->cancel, tl->global);
}
if (d) {
add_source(tl, d);
return true;
}
MP_ERR(tl, "Could not open source '%s'!\n", filename);
return false;
}
static bool open_source(struct timeline *tl, char *filename)
{
void *ctx = talloc_new(NULL);
bool res = false;
struct bstr dirname = mp_dirname(tl->demuxer->filename);
struct bstr base_filename = bstr0(mp_basename(filename));
if (!base_filename.len) {
MP_WARN(tl, "CUE: Invalid audio filename in .cue file!\n");
} else {
char *fullname = mp_path_join_bstr(ctx, dirname, base_filename);
if (try_open(tl, fullname)) {
res = true;
goto out;
}
}
// Try an audio file with the same name as the .cue file (but different
// extension).
// Rationale: this situation happens easily if the audio file or both files
// are renamed.
struct bstr cuefile =
bstr_strip_ext(bstr0(mp_basename(tl->demuxer->filename)));
DIR *d = opendir(bstrdup0(ctx, dirname));
if (!d)
goto out;
struct dirent *de;
while ((de = readdir(d))) {
char *dename0 = de->d_name;
struct bstr dename = bstr0(dename0);
if (bstr_case_startswith(dename, cuefile)) {
MP_WARN(tl, "CUE: No useful audio filename "
"in .cue file found, trying with '%s' instead!\n",
dename0);
if (try_open(tl, mp_path_join_bstr(ctx, dirname, dename))) {
res = true;
break;
}
}
}
closedir(d);
out:
talloc_free(ctx);
if (!res)
MP_ERR(tl, "CUE: Could not open audio file!\n");
return res;
}
static void build_timeline(struct timeline *tl)
{
struct priv *p = tl->demuxer->priv;
void *ctx = talloc_new(NULL);
add_source(tl, tl->demuxer);
struct cue_track *tracks = NULL;
size_t track_count = 0;
for (size_t n = 0; n < p->f->num_tracks; n++) {
struct cue_track *track = &p->f->tracks[n];
if (track->filename) {
MP_TARRAY_APPEND(ctx, tracks, track_count, *track);
} else {
MP_WARN(tl->demuxer, "No file specified for track entry %zd. "
"It will be removed\n", n + 1);
}
}
if (track_count == 0) {
MP_ERR(tl, "CUE: no tracks found!\n");
goto out;
}
// Remove duplicate file entries. This might be too sophisticated, since
// CUE files usually use either separate files for every single track, or
// only one file for all tracks.
char **files = 0;
size_t file_count = 0;
for (size_t n = 0; n < track_count; n++) {
struct cue_track *track = &tracks[n];
track->source = -1;
for (size_t file = 0; file < file_count; file++) {
if (strcmp(files[file], track->filename) == 0) {
track->source = file;
break;
}
}
if (track->source == -1) {
file_count++;
files = talloc_realloc(ctx, files, char *, file_count);
files[file_count - 1] = track->filename;
track->source = file_count - 1;
}
}
for (size_t i = 0; i < file_count; i++) {
if (!open_source(tl, files[i]))
goto out;
}
struct timeline_part *timeline = talloc_array_ptrtype(tl, timeline,
track_count + 1);
struct demux_chapter *chapters = talloc_array_ptrtype(tl, chapters,
track_count);
double starttime = 0;
for (int i = 0; i < track_count; i++) {
struct demuxer *source = tl->sources[1 + tracks[i].source];
double duration;
if (i + 1 < track_count && tracks[i].source == tracks[i + 1].source) {
duration = tracks[i + 1].start - tracks[i].start;
} else {
duration = source->duration;
// Two cases: 1) last track of a single-file cue, or 2) any track of
// a multi-file cue. We need to do this for 1) only because the
// timeline needs to be terminated with the length of the last
// track.
duration -= tracks[i].start;
}
if (duration < 0) {
MP_WARN(tl, "CUE: Can't get duration of source file!\n");
// xxx: do something more reasonable
duration = 0.0;
}
timeline[i] = (struct timeline_part) {
.start = starttime,
.end = starttime + duration,
.source_start = tracks[i].start,
.source = source,
};
chapters[i] = (struct demux_chapter) {
.pts = timeline[i].start,
.metadata = mp_tags_dup(tl, tracks[i].tags),
};
starttime = timeline[i].end;
}
struct timeline_par *par = talloc_ptrtype(tl, par);
*par = (struct timeline_par){
.parts = timeline,
.num_parts = track_count,
.track_layout = timeline[0].source,
};
tl->chapters = chapters;
tl->num_chapters = track_count;
MP_TARRAY_APPEND(tl, tl->pars, tl->num_pars, par);
tl->meta = par->track_layout;
tl->format = "cue";
out:
talloc_free(ctx);
}
static int try_open_file(struct demuxer *demuxer, enum demux_check check)
{
if (!demuxer->access_references)
return -1;
struct stream *s = demuxer->stream;
if (check >= DEMUX_CHECK_UNSAFE) {
char probe[PROBE_SIZE];
int len = stream_read_peek(s, probe, sizeof(probe));
if (len < 1 || !mp_probe_cue((bstr){probe, len}))
return -1;
}
struct priv *p = talloc_zero(demuxer, struct priv);
demuxer->priv = p;
demuxer->fully_read = true;
p->opts = mp_get_config_group(p, demuxer->global, &demux_cue_conf);
struct demux_cue_opts *cue_opts = p->opts;
bstr data = stream_read_complete(s, p, 1000000);
if (data.start == NULL)
return -1;
const char *charset = mp_charset_guess(p, demuxer->log, data, cue_opts->cue_cp, 0);
if (charset && !mp_charset_is_utf8(charset)) {
MP_INFO(demuxer, "Using CUE charset: %s\n", charset);
bstr utf8 = mp_iconv_to_utf8(demuxer->log, data, charset, MP_ICONV_VERBOSE);
if (utf8.start && utf8.start != data.start) {
ta_steal(data.start, utf8.start);
data = utf8;
}
}
p->f = mp_parse_cue(data);
talloc_steal(p, p->f);
if (!p->f) {
MP_ERR(demuxer, "error parsing input file!\n");
return -1;
}
demux_close_stream(demuxer);
mp_tags_merge(demuxer->metadata, p->f->tags);
return 0;
}
const struct demuxer_desc demuxer_desc_cue = {
.name = "cue",
.desc = "CUE sheet",
.open = try_open_file,
.load_timeline = build_timeline,
};