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avformat/mov: Eliminate variable buf_size from mov_estimate_video_delay() 

Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Reviewed-by: Sasi Inguva <isasi@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-07-11 02:17:56 +02:00
parent c995e01b1e
commit 3ce4034308
1 changed files with 8 additions and 11 deletions
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19
libavformat/mov.c
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@ -3301,25 +3301,22 @@ static void mov_estimate_video_delay(MOVContext *c, AVStream* st) {
int ctts_sample = 0;
int64_t pts_buf[MAX_REORDER_DELAY + 1]; // Circular buffer to sort pts.
int buf_start = 0;
int buf_size = 0;
int j, r, num_swaps;
for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
pts_buf[j] = INT64_MIN;
if (st->codecpar->video_delay <= 0 && msc->ctts_data &&
st->codecpar->codec_id == AV_CODEC_ID_H264) {
st->codecpar->video_delay = 0;
for(ind = 0; ind < st->nb_index_entries && ctts_ind < msc->ctts_count; ++ind) {
if (buf_size == (MAX_REORDER_DELAY + 1)) {
// If circular buffer is full, then move the first element forward.
buf_start = (buf_start + 1);
if (buf_start == MAX_REORDER_DELAY + 1)
buf_start = 0;
} else {
++buf_size;
}
buf_start = (buf_start + 1);
if (buf_start == MAX_REORDER_DELAY + 1)
buf_start = 0;
// Point j to the last elem of the buffer and insert the current pts there.
j = buf_start - 1;
if (j < 0) j = buf_size - 1;
if (j < 0) j = MAX_REORDER_DELAY;
pts_buf[j] = st->index_entries[ind].timestamp + msc->ctts_data[ctts_ind].duration;
// The timestamps that are already in the sorted buffer, and are greater than the
@ -3331,7 +3328,7 @@ static void mov_estimate_video_delay(MOVContext *c, AVStream* st) {
num_swaps = 0;
while (j != buf_start) {
r = j - 1;
if (r < 0) r = buf_size - 1;
if (r < 0) r = MAX_REORDER_DELAY;
if (pts_buf[j] < pts_buf[r]) {
FFSWAP(int64_t, pts_buf[j], pts_buf[r]);
++num_swaps;