#include "seek.h"
#include "libavutil/mem.h"
+#include "internal.h"
// NOTE: implementation should be moved here in another patch, to keep patches
// separated.
-extern void av_read_frame_flush(AVFormatContext *s);
/**
* helper structure describing keyframe search state of one stream
int terminated; ///< termination flag for the current iteration
} AVSyncPoint;
-/**
- * Compare two timestamps exactly, taking their respective time bases into account.
- *
- * @param ts_a timestamp A
- * @param tb_a time base for timestamp A
- * @param ts_b timestamp B
- * @param tb_b time base for timestamp A
- * @return -1, 0 or 1 if timestamp A is less than, equal or greater than timestamp B
- */
-static int compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
-{
- int64_t a, b, res;
-
- if (ts_a == INT64_MIN)
- return ts_a < ts_b ? -1 : 0;
- if (ts_a == INT64_MAX)
- return ts_a > ts_b ? 1 : 0;
- if (ts_b == INT64_MIN)
- return ts_a > ts_b ? 1 : 0;
- if (ts_b == INT64_MAX)
- return ts_a < ts_b ? -1 : 0;
-
- a = ts_a * tb_a.num * tb_b.den;
- b = ts_b * tb_b.num * tb_a.den;
-
- res = a - b;
- if (!res)
- return 0;
- else
- return (res >> 63) | 1;
-}
-
/**
* Compute a distance between timestamps.
*
// Evaluate key frames with known TS (or any frames, if AVSEEK_FLAG_ANY set).
if (pts != AV_NOPTS_VALUE &&
- ((flg & PKT_FLAG_KEY) || (flags & AVSEEK_FLAG_ANY))) {
+ ((flg & AV_PKT_FLAG_KEY) || (flags & AVSEEK_FLAG_ANY))) {
if (flags & AVSEEK_FLAG_BYTE) {
// for byte seeking, use position as timestamp
ts = pos;
}
if (sp->term_ts != AV_NOPTS_VALUE &&
- compare_ts(ts, ts_tb, sp->term_ts, sp->term_ts_tb) > 0) {
+ av_compare_ts(ts, ts_tb, sp->term_ts, sp->term_ts_tb) > 0) {
// past the end position from last iteration, ignore packet
if (!sp->terminated) {
sp->terminated = 1;
continue;
}
- if (compare_ts(ts, ts_tb, timestamp, timebase) <= 0) {
+ if (av_compare_ts(ts, ts_tb, timestamp, timebase) <= 0) {
// keyframe found before target timestamp
if (sp->pos_lo == INT64_MAX) {
// found first keyframe lower than target timestamp
sp->pos_lo = pos;
}
}
- if (compare_ts(ts, ts_tb, timestamp, timebase) >= 0) {
+ if (av_compare_ts(ts, ts_tb, timestamp, timebase) >= 0) {
// keyframe found after target timestamp
if (sp->pos_hi == INT64_MAX) {
// found first keyframe higher than target timestamp
}
// Clean up the parser.
- av_read_frame_flush(s);
+ ff_read_frame_flush(s);
}
int64_t ff_gen_syncpoint_search(AVFormatContext *s,
min_distance = INT64_MAX;
// Find timestamp closest to requested timestamp within min/max limits.
if (sp->pos_lo != INT64_MAX
- && compare_ts(ts_min, time_base, sp->ts_lo, st->time_base) <= 0
- && compare_ts(sp->ts_lo, st->time_base, ts_max, time_base) <= 0) {
+ && av_compare_ts(ts_min, time_base, sp->ts_lo, st->time_base) <= 0
+ && av_compare_ts(sp->ts_lo, st->time_base, ts_max, time_base) <= 0) {
// low timestamp is in range
min_distance = ts_distance(ts, time_base, sp->ts_lo, st->time_base);
min_pos = sp->pos_lo;
}
if (sp->pos_hi != INT64_MAX
- && compare_ts(ts_min, time_base, sp->ts_hi, st->time_base) <= 0
- && compare_ts(sp->ts_hi, st->time_base, ts_max, time_base) <= 0) {
+ && av_compare_ts(ts_min, time_base, sp->ts_hi, st->time_base) <= 0
+ && av_compare_ts(sp->ts_hi, st->time_base, ts_max, time_base) <= 0) {
// high timestamp is in range, check distance
distance = ts_distance(sp->ts_hi, st->time_base, ts, time_base);
if (distance < min_distance) {
int i;
AVStream *st;
AVParserStreamState *ss;
- av_read_frame_flush(s);
+ ff_read_frame_flush(s);
if (!state)
return;