732
732
if(!avi->index_loaded && pb->seekable)
733
733
avi_load_index(s);
734
734
avi->index_loaded = 1;
735
avi->non_interleaved |= guess_ni_flag(s);
736
if ((ret = guess_ni_flag(s)) < 0)
739
avi->non_interleaved |= ret;
736
740
for(i=0; i<s->nb_streams; i++){
737
741
AVStream *st = s->streams[i];
738
742
if(st->nb_index_entries)
1211
/* Scan the index and consider any file with streams more than
1212
* 2 seconds or 64MB apart non-interleaved. */
1213
static int check_stream_max_drift(AVFormatContext *s)
1215
int64_t min_pos, pos;
1217
int *idx = av_mallocz_array(s->nb_streams, sizeof(*idx));
1219
return AVERROR(ENOMEM);
1221
for (min_pos = pos = 0; min_pos != INT64_MAX; pos = min_pos + 1LU) {
1222
int64_t max_dts = INT64_MIN / 2;
1223
int64_t min_dts = INT64_MAX / 2;
1224
int64_t max_buffer = 0;
1226
min_pos = INT64_MAX;
1228
for (i = 0; i < s->nb_streams; i++) {
1229
AVStream *st = s->streams[i];
1230
AVIStream *ast = st->priv_data;
1231
int n = st->nb_index_entries;
1232
while (idx[i] < n && st->index_entries[idx[i]].pos < pos)
1236
dts = av_rescale_q(st->index_entries[idx[i]].timestamp /
1237
FFMAX(ast->sample_size, 1),
1238
st->time_base, AV_TIME_BASE_Q);
1239
min_dts = FFMIN(min_dts, dts);
1240
min_pos = FFMIN(min_pos, st->index_entries[idx[i]].pos);
1243
for (i = 0; i < s->nb_streams; i++) {
1244
AVStream *st = s->streams[i];
1245
AVIStream *ast = st->priv_data;
1247
if (idx[i] && min_dts != INT64_MAX / 2) {
1249
dts = av_rescale_q(st->index_entries[idx[i] - 1].timestamp /
1250
FFMAX(ast->sample_size, 1),
1251
st->time_base, AV_TIME_BASE_Q);
1252
max_dts = FFMAX(max_dts, dts);
1253
max_buffer = FFMAX(max_buffer,
1254
av_rescale(dts - min_dts,
1255
st->codec->bit_rate,
1259
if (max_dts - min_dts > 2 * AV_TIME_BASE ||
1260
max_buffer > 1024 * 1024 * 8 * 8) {
1207
1269
static int guess_ni_flag(AVFormatContext *s){
1209
1271
int64_t last_start=0;
1232
1294
first_end= st->index_entries[n-1].pos;
1234
1296
avio_seek(s->pb, oldpos, SEEK_SET);
1235
return last_start > first_end;
1298
if (last_start > first_end)
1301
return check_stream_max_drift(s);
1238
1304
static int avi_load_index(AVFormatContext *s)