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Clean up vfr.cpp a little

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This commit is contained in:
Thomas Goyne 2013-06-07 19:59:53 -07:00
parent 2781df7ce9
commit 995a8642f0
2 changed files with 16 additions and 26 deletions
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40
aegisub/libaegisub/common/vfr.cpp
View file

@ -35,20 +35,15 @@
#include <boost/range/algorithm.hpp>
namespace std {
template<> void swap(agi::vfr::Framerate &lft, agi::vfr::Framerate &rgt) {
lft.swap(rgt);
}
}
namespace {
static const int64_t default_denominator = 1000000000;
namespace agi {
namespace vfr {
using agi::line_iterator;
using namespace agi::vfr;
/// @brief Verify that timecodes monotonically increase
/// @param timecodes List of timecodes to check
static void validate_timecodes(std::vector<int> const& timecodes) {
void validate_timecodes(std::vector<int> const& timecodes) {
if (timecodes.size() <= 1)
throw TooFewTimecodes("Must have at least two timecodes to do anything useful");
if (!is_sorted(timecodes.begin(), timecodes.end()))
@ -57,7 +52,7 @@ static void validate_timecodes(std::vector<int> const& timecodes) {
/// @brief Shift timecodes so that frame 0 starts at time 0
/// @param timecodes List of timecodes to normalize
static void normalize_timecodes(std::vector<int> &timecodes) {
void normalize_timecodes(std::vector<int> &timecodes) {
if (int front = timecodes.front())
boost::for_each(timecodes, [=](int &tc) { tc -= front; });
}
@ -67,9 +62,7 @@ struct TimecodeRange {
int start;
int end;
double fps;
bool operator<(TimecodeRange const& cmp) const {
return start < cmp.start;
}
bool operator<(TimecodeRange const& cmp) const { return start < cmp.start; }
TimecodeRange(int start=0, int end=0, double fps=0.)
: start(start), end(end), fps(fps) { }
};
@ -77,7 +70,7 @@ struct TimecodeRange {
/// @brief Parse a single line of a v1 timecode file
/// @param str Line to parse
/// @return The line in TimecodeRange form, or TimecodeRange() if it's a comment
static TimecodeRange v1_parse_line(std::string const& str) {
TimecodeRange v1_parse_line(std::string const& str) {
if (str.empty() || str[0] == '#') return TimecodeRange();
std::istringstream ss(str);
@ -102,14 +95,12 @@ static TimecodeRange v1_parse_line(std::string const& str) {
/// @brief Generate override ranges for all frames with assumed fpses
/// @param ranges List with ranges which is mutated
/// @param fps Assumed fps to use for gaps
static void v1_fill_range_gaps(std::list<TimecodeRange> &ranges, double fps) {
void v1_fill_range_gaps(std::list<TimecodeRange> &ranges, double fps) {
// Range for frames between start and first override
if (ranges.empty() || ranges.front().start > 0)
ranges.emplace_front(0, ranges.empty() ? 0 : ranges.front().start - 1, fps);
std::list<TimecodeRange>::iterator cur = ++ranges.begin();
std::list<TimecodeRange>::iterator prev = ranges.begin();
for (; cur != ranges.end(); ++cur, ++prev) {
for (auto cur = ++begin(ranges), prev = begin(ranges); cur != end(ranges); ++cur, ++prev) {
if (prev->end >= cur->start)
// mkvmerge allows overlapping timecode ranges, but does completely
// broken things with them
@ -127,13 +118,13 @@ static void v1_fill_range_gaps(std::list<TimecodeRange> &ranges, double fps) {
/// @param[out] timecodes Vector filled with frame start times
/// @param[out] last Unrounded time of the last frame
/// @return Assumed fps times one million
static int64_t v1_parse(line_iterator<std::string> file, std::string line, std::vector<int> &timecodes, int64_t &last) {
int64_t v1_parse(line_iterator<std::string> file, std::string line, std::vector<int> &timecodes, int64_t &last) {
double fps = atof(line.substr(7).c_str());
if (fps <= 0.) throw BadFPS("Assumed FPS must be greater than zero");
if (fps > 1000.) throw BadFPS("Assumed FPS must not be greater than 1000");
std::list<TimecodeRange> ranges;
transform(file, line_iterator<std::string>(), back_inserter(ranges), v1_parse_line);
transform(file, end(file), back_inserter(ranges), v1_parse_line);
ranges.erase(boost::remove_if(ranges, [](TimecodeRange const& r) { return r.fps == 0; }), ranges.end());
ranges.sort();
@ -152,6 +143,11 @@ static int64_t v1_parse(line_iterator<std::string> file, std::string line, std::
return int64_t(fps * default_denominator);
}
}
namespace agi {
namespace vfr {
Framerate::Framerate(double fps)
: denominator(default_denominator)
, numerator(int64_t(fps * denominator))
@ -198,10 +194,6 @@ void Framerate::swap(Framerate &right) throw() {
swap(timecodes, right.timecodes);
}
Framerate &Framerate::operator=(double fps) {
return *this = Framerate(fps);
}
Framerate::Framerate(fs::path const& filename)
: denominator(default_denominator)
, numerator(0)

2
aegisub/libaegisub/include/libaegisub/vfr.h
View file

@ -109,8 +109,6 @@ public:
/// @param timecodes Vector of frame start times in milliseconds
Framerate(std::vector<int> const& timecodes);
/// Atomic CFR assignment operator
Framerate &operator=(double);
/// Helper function for the std::swap specialization
void swap(Framerate &right) throw();