// Disable style definitions generated by the libavcodec converter.
// We always want the user defined style instead.
static void disable_styles(bstr header)
{
while (header.len) {
int n = bstr_find(header, bstr0("\nStyle: "));
if (n < 0)
break;
header.start[n + 1] = '#'; // turn into a comment
header = bstr_cut(header, 2);
}
}
// Unlike with bstr_split(), tok is a string, and not a set of char.
// If tok is in str, return true, and: concat(out_left, tok, out_right) == str
// Otherwise, return false, and set out_left==str, out_right==""
bool bstr_split_tok(bstr str, const char *tok, bstr *out_left, bstr *out_right)
{
bstr bsep = bstr0(tok);
int pos = bstr_find(str, bsep);
if (pos < 0)
pos = str.len;
*out_left = bstr_splice(str, 0, pos);
*out_right = bstr_cut(str, pos + bsep.len);
return pos != str.len;
}
bool mp_replace_legacy_cmd(void *t, bstr *s)
{
for (const struct legacy_cmd *entry = legacy_cmds; entry->old; entry++) {
bstr old = bstr0(entry->old);
if (bstrcasecmp(bstr_splice(*s, 0, old.len), old) == 0) {
bstr rest = bstr_cut(*s, old.len);
*s = bstr0(talloc_asprintf(t, "%s%.*s", entry->new, BSTR_P(rest)));
return true;
}
}
static char *read_quoted(void *talloc_ctx, struct bstr *data)
{
*data = bstr_lstrip(*data);
if (!eat_char(data, '"'))
return NULL;
int end = bstrchr(*data, '"');
if (end < 0)
return NULL;
struct bstr res = bstr_splice(*data, 0, end);
*data = bstr_cut(*data, end + 1);
return bstrto0(talloc_ctx, res);
}
double bstrtod(struct bstr str, struct bstr *rest)
{
str = bstr_lstrip(str);
char buf[101];
int len = FFMIN(str.len, 100);
memcpy(buf, str.start, len);
buf[len] = 0;
char *endptr;
double r = strtod(buf, &endptr);
if (rest)
*rest = bstr_cut(str, endptr - buf);
return r;
}
long long bstrtoll(struct bstr str, struct bstr *rest, int base)
{
str = bstr_lstrip(str);
char buf[51];
int len = FFMIN(str.len, 50);
memcpy(buf, str.start, len);
buf[len] = 0;
char *endptr;
long long r = strtoll(buf, &endptr, base);
if (rest)
*rest = bstr_cut(str, endptr - buf);
return r;
}
static enum cue_command read_cmd(struct bstr *data, struct bstr *out_params)
{
struct bstr line = bstr_strip_linebreaks(bstr_getline(*data, data));
line = bstr_lstrip(line);
if (line.len == 0)
return CUE_EMPTY;
for (int n = 0; cue_command_strings[n].command != -1; n++) {
struct bstr name = bstr0(cue_command_strings[n].text);
if (bstr_startswith(line, name)) {
struct bstr rest = bstr_cut(line, name.len);
if (rest.len && !strchr(WHITESPACE, rest.start[0]))
continue;
if (out_params)
*out_params = rest;
return cue_command_strings[n].command;
}
}
return CUE_ERROR;
}
static struct bstr skip_utf8_bom(struct bstr data)
{
return bstr_startswith0(data, "\xEF\xBB\xBF") ? bstr_cut(data, 3) : data;
}
// Returns 0 if a valid option/file is available, <0 on error, 1 on end of args.
static int split_opt_silent(struct parse_state *p)
{
assert(!p->error);
if (p->argc < 1)
return 1;
p->mp_opt = NULL;
p->arg = bstr0(p->argv[0]);
p->param = bstr0(NULL);
p->argc--;
p->argv++;
if (p->no_more_opts || !bstr_startswith0(p->arg, "-") || p->arg.len == 1)
return 0;
if (bstrcmp0(p->arg, "--") == 0) {
p->no_more_opts = true;
return split_opt_silent(p);
}
bool old_syntax = !bstr_startswith0(p->arg, "--");
if (old_syntax) {
p->arg = bstr_cut(p->arg, 1);
} else {
p->arg = bstr_cut(p->arg, 2);
int idx = bstrchr(p->arg, '=');
if (idx > 0) {
p->param = bstr_cut(p->arg, idx + 1);
p->arg = bstr_splice(p->arg, 0, idx);
}
}
p->mp_opt = m_config_get_option(p->config, p->arg);
if (!p->mp_opt) {
// Automagic "no-" arguments: "--no-bla" turns into "--bla=no".
if (!bstr_startswith0(p->arg, "no-"))
return -1;
struct bstr s = bstr_cut(p->arg, 3);
p->mp_opt = m_config_get_option(p->config, s);
if (!p->mp_opt || p->mp_opt->type != &m_option_type_flag)
return -1;
// Avoid allowing "--no-no-bla".
if (bstr_startswith(bstr0(p->mp_opt->name), bstr0("no-")))
return -1;
// Flag options never have parameters.
old_syntax = false;
if (p->param.len)
return -2;
p->arg = s;
p->param = bstr0("no");
}
if (bstr_endswith0(p->arg, "-clr"))
old_syntax = false;
if (old_syntax && !(p->mp_opt->type->flags & M_OPT_TYPE_OLD_SYNTAX_NO_PARAM))
{
if (p->argc < 1)
return -3;
p->param = bstr0(p->argv[0]);
p->argc--;
p->argv++;
}
return 0;
}
int m_config_parse(m_config_t *config, const char *location, bstr data,
char *initial_section, int flags)
{
m_profile_t *profile = m_config_add_profile(config, initial_section);
void *tmp = talloc_new(NULL);
int line_no = 0;
int errors = 0;
bstr_eatstart0(&data, "\xEF\xBB\xBF"); // skip BOM
while (data.len) {
talloc_free_children(tmp);
bool ok = false;
line_no++;
char loc[512];
snprintf(loc, sizeof(loc), "%s:%d:", location, line_no);
bstr line = bstr_strip_linebreaks(bstr_getline(data, &data));
if (!skip_ws(&line))
continue;
// Profile declaration
if (bstr_eatstart0(&line, "[")) {
bstr profilename;
if (!bstr_split_tok(line, "]", &profilename, &line)) {
MP_ERR(config, "%s missing closing ]\n", loc);
goto error;
}
if (skip_ws(&line)) {
MP_ERR(config, "%s unparseable extra characters: '%.*s'\n",
loc, BSTR_P(line));
goto error;
}
profile = m_config_add_profile(config, bstrto0(tmp, profilename));
continue;
}
bstr_eatstart0(&line, "--");
bstr option = line;
while (line.len && (mp_isalnum(line.start[0]) || line.start[0] == '_' ||
line.start[0] == '-'))
line = bstr_cut(line, 1);
option.len = option.len - line.len;
skip_ws(&line);
bstr value = {0};
if (bstr_eatstart0(&line, "=")) {
skip_ws(&line);
if (line.len && (line.start[0] == '"' || line.start[0] == '\'')) {
// Simple quoting, like "value"
char term[2] = {line.start[0], 0};
line = bstr_cut(line, 1);
if (!bstr_split_tok(line, term, &value, &line)) {
MP_ERR(config, "%s unterminated quote\n", loc);
goto error;
}
} else if (bstr_eatstart0(&line, "%")) {
// Quoting with length, like %5%value
bstr rest;
long long len = bstrtoll(line, &rest, 10);
if (rest.len == line.len || !bstr_eatstart0(&rest, "%") ||
len > rest.len)
{
MP_ERR(config, "%s fixed-length quoting expected - put "
"\"quotes\" around the option value if you did not "
"intend to use this, but your option value starts "
"with '%%'\n", loc);
goto error;
}
value = bstr_splice(rest, 0, len);
line = bstr_cut(rest, len);
} else {
// No quoting; take everything until the comment or end of line
int end = bstrchr(line, '#');
value = bstr_strip(end < 0 ? line : bstr_splice(line, 0, end));
line.len = 0;
}
}
if (skip_ws(&line)) {
MP_ERR(config, "%s unparseable extra characters: '%.*s'\n",
loc, BSTR_P(line));
goto error;
}
int res;
if (profile) {
if (bstr_equals0(option, "profile-desc")) {
m_profile_set_desc(profile, value);
res = 0;
} else {
res = m_config_set_profile_option(config, profile, option, value);
}
} else {
res = m_config_set_option_ext(config, option, value, flags);
}
if (res < 0) {
MP_ERR(config, "%s setting option %.*s='%.*s' failed.\n",
loc, BSTR_P(option), BSTR_P(value));
goto error;
}
ok = true;
error:
if (!ok)
errors++;
if (errors > 16) {
MP_ERR(config, "%s: too many errors, stopping.\n", location);
break;
}
}
talloc_free(tmp);
return 1;
}
/* Returns a list of parts, or NULL on parse error.
* Syntax (without file header or URI prefix):
* url ::= <entry> ( (';' | '\n') <entry> )*
* entry ::= <param> ( <param> ',' )*
* param ::= [<string> '='] (<string> | '%' <number> '%' <bytes>)
*/
static struct tl_parts *parse_edl(bstr str)
{
struct tl_parts *tl = talloc_zero(NULL, struct tl_parts);
while (str.len) {
if (bstr_eatstart0(&str, "#"))
bstr_split_tok(str, "\n", &(bstr){0}, &str);
if (bstr_eatstart0(&str, "\n") || bstr_eatstart0(&str, ";"))
continue;
struct tl_part p = { .length = -1 };
int nparam = 0;
while (1) {
bstr name, val;
// Check if it's of the form "name=..."
int next = bstrcspn(str, "=%,;\n");
if (next > 0 && next < str.len && str.start[next] == '=') {
name = bstr_splice(str, 0, next);
str = bstr_cut(str, next + 1);
} else {
const char *names[] = {"file", "start", "length"}; // implied name
name = bstr0(nparam < 3 ? names[nparam] : "-");
}
if (bstr_eatstart0(&str, "%")) {
int len = bstrtoll(str, &str, 0);
if (!bstr_startswith0(str, "%") || (len > str.len - 1))
goto error;
val = bstr_splice(str, 1, len + 1);
str = bstr_cut(str, len + 1);
} else {
next = bstrcspn(str, ",;\n");
val = bstr_splice(str, 0, next);
str = bstr_cut(str, next);
}
// Interpret parameters. Explicitly ignore unknown ones.
if (bstr_equals0(name, "file")) {
p.filename = bstrto0(tl, val);
} else if (bstr_equals0(name, "start")) {
if (!parse_time(val, &p.offset))
goto error;
p.offset_set = true;
} else if (bstr_equals0(name, "length")) {
if (!parse_time(val, &p.length))
goto error;
} else if (bstr_equals0(name, "timestamps")) {
if (bstr_equals0(val, "chapters"))
p.chapter_ts = true;
}
nparam++;
if (!bstr_eatstart0(&str, ","))
break;
}
if (!p.filename)
goto error;
MP_TARRAY_APPEND(tl, tl->parts, tl->num_parts, p);
}
if (!tl->num_parts)
goto error;
return tl;
error:
talloc_free(tl);
return NULL;
}
static struct demuxer *open_source(struct timeline *tl, char *filename)
{
for (int n = 0; n < tl->num_sources; n++) {
struct demuxer *d = tl->sources[n];
if (strcmp(d->stream->url, filename) == 0)
return d;
}
struct demuxer *d = demux_open_url(filename, NULL, tl->cancel, tl->global);
if (d) {
MP_TARRAY_APPEND(tl, tl->sources, tl->num_sources, d);
} else {
MP_ERR(tl, "EDL: Could not open source file '%s'.\n", filename);
}
return d;
}
static double demuxer_chapter_time(struct demuxer *demuxer, int n)
{
if (n < 0 || n >= demuxer->num_chapters)
return -1;
return demuxer->chapters[n].pts;
}
// Append all chapters from src to the chapters array.
// Ignore chapters outside of the given time range.
static void copy_chapters(struct demux_chapter **chapters, int *num_chapters,
struct demuxer *src, double start, double len,
double dest_offset)
{
for (int n = 0; n < src->num_chapters; n++) {
double time = demuxer_chapter_time(src, n);
if (time >= start && time <= start + len) {
struct demux_chapter ch = {
.pts = dest_offset + time - start,
.metadata = mp_tags_dup(*chapters, src->chapters[n].metadata),
};
MP_TARRAY_APPEND(NULL, *chapters, *num_chapters, ch);
}
}
}
// return length of the source in seconds, or -1 if unknown
static double source_get_length(struct demuxer *demuxer)
{
double time;
// <= 0 means DEMUXER_CTRL_NOTIMPL or DEMUXER_CTRL_DONTKNOW
if (demux_control(demuxer, DEMUXER_CTRL_GET_TIME_LENGTH, &time) <= 0)
time = -1;
return time;
}
static void resolve_timestamps(struct tl_part *part, struct demuxer *demuxer)
{
if (part->chapter_ts) {
double start = demuxer_chapter_time(demuxer, part->offset);
double length = part->length;
double end = length;
if (end >= 0)
end = demuxer_chapter_time(demuxer, part->offset + part->length);
if (end >= 0 && start >= 0)
length = end - start;
part->offset = start;
part->length = length;
}
if (!part->offset_set)
part->offset = demuxer->start_time;
}
static void build_timeline(struct timeline *tl, struct tl_parts *parts)
{
tl->parts = talloc_array_ptrtype(tl, tl->parts, parts->num_parts + 1);
double starttime = 0;
for (int n = 0; n < parts->num_parts; n++) {
struct tl_part *part = &parts->parts[n];
struct demuxer *source = open_source(tl, part->filename);
if (!source)
goto error;
resolve_timestamps(part, source);
double end_time = source_get_length(source);
if (end_time >= 0)
end_time += source->start_time;
// Unknown length => use rest of the file. If duration is unknown, make
// something up.
if (part->length < 0) {
if (end_time < 0) {
MP_WARN(tl, "EDL: source file '%s' has unknown duration.\n",
part->filename);
end_time = 1;
}
part->length = end_time - part->offset;
} else if (end_time >= 0) {
double end_part = part->offset + part->length;
if (end_part > end_time) {
MP_WARN(tl, "EDL: entry %d uses %f "
"seconds, but file has only %f seconds.\n",
n, end_part, end_time);
}
}
// Add a chapter between each file.
struct demux_chapter ch = {
.pts = starttime,
.metadata = talloc_zero(tl, struct mp_tags),
};
mp_tags_set_str(ch.metadata, "title", part->filename);
MP_TARRAY_APPEND(tl, tl->chapters, tl->num_chapters, ch);
// Also copy the source file's chapters for the relevant parts
copy_chapters(&tl->chapters, &tl->num_chapters, source, part->offset,
part->length, starttime);
tl->parts[n] = (struct timeline_part) {
.start = starttime,
.source_start = part->offset,
.source = source,
};
starttime += part->length;
}
tl->parts[parts->num_parts] = (struct timeline_part) {.start = starttime};
tl->num_parts = parts->num_parts;
tl->track_layout = tl->parts[0].source;
return;
error:
tl->num_parts = 0;
tl->num_chapters = 0;
}
// For security, don't allow relative or absolute paths, only plain filenames.
// Also, make these filenames relative to the edl source file.
static void fix_filenames(struct tl_parts *parts, char *source_path)
{
struct bstr dirname = mp_dirname(source_path);
for (int n = 0; n < parts->num_parts; n++) {
struct tl_part *part = &parts->parts[n];
char *filename = mp_basename(part->filename); // plain filename only
part->filename = mp_path_join_bstr(parts, dirname, bstr0(filename));
}
}
static void build_mpv_edl_timeline(struct timeline *tl)
{
struct priv *p = tl->demuxer->priv;
struct tl_parts *parts = parse_edl(p->data);
if (!parts) {
MP_ERR(tl, "Error in EDL.\n");
return;
}
MP_TARRAY_APPEND(tl, tl->sources, tl->num_sources, tl->demuxer);
// Source is .edl and not edl:// => don't allow arbitrary paths
if (tl->demuxer->stream->uncached_type != STREAMTYPE_EDL)
fix_filenames(parts, tl->demuxer->filename);
build_timeline(tl, parts);
talloc_free(parts);
}
static int try_open_file(struct demuxer *demuxer, enum demux_check check)
{
struct priv *p = talloc_zero(demuxer, struct priv);
demuxer->priv = p;
demuxer->fully_read = true;
struct stream *s = demuxer->stream;
if (s->uncached_type == STREAMTYPE_EDL) {
p->data = bstr0(s->path);
return 0;
}
if (check >= DEMUX_CHECK_UNSAFE) {
if (!bstr_equals0(stream_peek(s, strlen(HEADER)), HEADER))
return -1;
}
p->data = stream_read_complete(s, demuxer, 1000000);
if (p->data.start == NULL)
return -1;
bstr_eatstart0(&p->data, HEADER);
return 0;
}
const struct demuxer_desc demuxer_desc_edl = {
.name = "edl",
.desc = "Edit decision list",
.open = try_open_file,
.load_timeline = build_mpv_edl_timeline,
};
static struct bstr read_quoted(struct bstr *data)
{
*data = bstr_lstrip(*data);
if (!eat_char(data, '"'))
return (struct bstr) {0};
int end = bstrchr(*data, '"');
if (end < 0)
return (struct bstr) {0};
struct bstr res = bstr_splice(*data, 0, end);
*data = bstr_cut(*data, end + 1);
return res;
}
// Read a 2 digit unsigned decimal integer.
// Return -1 on failure.
static int read_int_2(struct bstr *data)
{
*data = bstr_lstrip(*data);
if (data->len && data->start[0] == '-')
return -1;
struct bstr s = *data;
int res = (int)bstrtoll(s, &s, 10);
if (data->len == s.len || data->len - s.len > 2)
return -1;
*data = s;
return res;
}
static double read_time(struct bstr *data)
{
struct bstr s = *data;
bool ok = true;
double t1 = read_int_2(&s);
ok = eat_char(&s, ':') && ok;
double t2 = read_int_2(&s);
ok = eat_char(&s, ':') && ok;
double t3 = read_int_2(&s);
ok = ok && t1 >= 0 && t2 >= 0 && t3 >= 0;
return ok ? t1 * 60.0 + t2 + t3 * SECS_PER_CUE_FRAME : 0;
}
static struct bstr skip_utf8_bom(struct bstr data)
{
return bstr_startswith0(data, "\xEF\xBB\xBF") ? bstr_cut(data, 3) : data;
}
// Check if the text in data is most likely CUE data. This is used by the
// demuxer code to check the file type.
// data is the start of the probed file, possibly cut off at a random point.
bool mp_probe_cue(struct bstr data)
{
bool valid = false;
data = skip_utf8_bom(data);
for (;;) {
enum cue_command cmd = read_cmd(&data, NULL);
// End reached. Since the line was most likely cut off, don't use the
// result of the last parsing call.
if (data.len == 0)
break;
if (cmd == CUE_ERROR)
return false;
if (cmd != CUE_EMPTY)
valid = true;
}
return valid;
}
