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ffmpeg
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add ff_index_search_timestamp and ff_add_index_entry 

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit e6fb5a4f78)
This commit is contained in:
Peter Ross 2011-01-22 20:03:22 +11:00 committed by Michael Niedermayer
parent 566f17b62d
commit 2d9fd1810b
3 changed files with 45 additions and 15 deletions
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14
libavformat/internal.h
View File

@ -226,4 +226,18 @@ void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
*/
int ff_find_stream_index(AVFormatContext *s, int id);
/**
* Internal version of av_index_search_timestamp
*/
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
int64_t wanted_timestamp, int flags);
/**
* Internal version of av_add_index_entry
*/
int ff_add_index_entry(AVIndexEntry **index_entries,
int *nb_index_entries,
unsigned int *index_entries_allocated_size,
int64_t pos, int64_t timestamp, int size, int distance, int flags);
#endif /* AVFORMAT_INTERNAL_H */

45
libavformat/utils.c
View File

@ -1370,28 +1370,30 @@ void ff_reduce_index(AVFormatContext *s, int stream_index)
}
}
int av_add_index_entry(AVStream *st,
int64_t pos, int64_t timestamp, int size, int distance, int flags)
int ff_add_index_entry(AVIndexEntry **index_entries,
int *nb_index_entries,
unsigned int *index_entries_allocated_size,
int64_t pos, int64_t timestamp, int size, int distance, int flags)
{
AVIndexEntry *entries, *ie;
int index;
if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
return -1;
entries = av_fast_realloc(st->index_entries,
&st->index_entries_allocated_size,
(st->nb_index_entries + 1) *
entries = av_fast_realloc(*index_entries,
index_entries_allocated_size,
(*nb_index_entries + 1) *
sizeof(AVIndexEntry));
if(!entries)
return -1;
st->index_entries= entries;
*index_entries= entries;
index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
if(index<0){
index= st->nb_index_entries++;
index= (*nb_index_entries)++;
ie= &entries[index];
assert(index==0 || ie[-1].timestamp < timestamp);
}else{
@ -1399,8 +1401,8 @@ int av_add_index_entry(AVStream *st,
if(ie->timestamp != timestamp){
if(ie->timestamp <= timestamp)
return -1;
memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index));
st->nb_index_entries++;
memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
(*nb_index_entries)++;
}else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
distance= ie->min_distance;
}
@ -1414,11 +1416,17 @@ int av_add_index_entry(AVStream *st,
return index;
}
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
int flags)
int av_add_index_entry(AVStream *st,
int64_t pos, int64_t timestamp, int size, int distance, int flags)
{
return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
&st->index_entries_allocated_size, pos,
timestamp, size, distance, flags);
}
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
int64_t wanted_timestamp, int flags)
{
AVIndexEntry *entries= st->index_entries;
int nb_entries= st->nb_index_entries;
int a, b, m;
int64_t timestamp;
@ -1450,6 +1458,13 @@ int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
return m;
}
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
int flags)
{
return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
wanted_timestamp, flags);
}
#define DEBUG_SEEK
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){

1
libavformat/wtv.c
View File

@ -28,6 +28,7 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat_readwrite.h"
#include "avformat.h"
#include "internal.h"
#include "riff.h"
#include "asf.h"
#include "mpegts.h"