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demux: cache a value

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Just for readability purposes. Although the field is mutable, it never
changes within the function.
This commit is contained in:
wm4 2019-06-10 03:44:50 +02:00
parent aa03ee7300
commit 628abf53d1
1 changed files with 9 additions and 10 deletions
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19
demux/demux.c
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@ -1551,18 +1551,19 @@ static void add_index_entry(struct demux_queue *queue, struct demux_packet *dp)
// try joining it into a single range.
static void attempt_range_joining(struct demux_internal *in)
{
struct demux_cached_range *current = in->current_range;
struct demux_cached_range *next = NULL;
double next_dist = INFINITY;
assert(in->current_range && in->num_ranges > 0);
assert(in->current_range == in->ranges[in->num_ranges - 1]);
assert(current && in->num_ranges > 0);
assert(current == in->ranges[in->num_ranges - 1]);
for (int n = 0; n < in->num_ranges - 1; n++) {
struct demux_cached_range *range = in->ranges[n];
if (in->current_range->seek_start <= range->seek_start) {
if (current->seek_start <= range->seek_start) {
// This uses ">" to get some non-0 overlap.
double dist = in->current_range->seek_end - range->seek_start;
double dist = current->seek_end - range->seek_start;
if (dist > 0 && dist < next_dist) {
next = range;
next_dist = dist;
@ -1574,7 +1575,7 @@ static void attempt_range_joining(struct demux_internal *in)
return;
MP_VERBOSE(in, "going to join ranges %f-%f + %f-%f\n",
in->current_range->seek_start, in->current_range->seek_end,
current->seek_start, current->seek_end,
next->seek_start, next->seek_end);
// Try to find a join point, where packets obviously overlap. (It would be
@ -1586,7 +1587,7 @@ static void attempt_range_joining(struct demux_internal *in)
for (int n = 0; n < in->num_streams; n++) {
struct demux_stream *ds = in->streams[n]->ds;
struct demux_queue *q1 = in->current_range->streams[n];
struct demux_queue *q1 = current->streams[n];
struct demux_queue *q2 = next->streams[n];
if (!ds->global_correct_pos && !ds->global_correct_dts) {
@ -1658,7 +1659,7 @@ static void attempt_range_joining(struct demux_internal *in)
// data associated with the current range.
for (int n = 0; n < in->num_streams; n++) {
struct demux_queue *q1 = in->current_range->streams[n];
struct demux_queue *q1 = current->streams[n];
struct demux_queue *q2 = next->streams[n];
struct demux_stream *ds = in->streams[n]->ds;
@ -1712,15 +1713,13 @@ static void attempt_range_joining(struct demux_internal *in)
ds->refreshing = ds->selected;
}
struct demux_cached_range *current = in->current_range;
for (int n = 0; n < next->num_metadata; n++) {
MP_TARRAY_APPEND(current, current->metadata, current->num_metadata,
next->metadata[n]);
}
next->num_metadata = 0;
update_seek_ranges(in->current_range);
update_seek_ranges(current);
// Move demuxing position to after the current range.
in->seeking = true;