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lavf: add a AVPROBE_SCORE_RETRY instead of using hardcoded values. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-10-10 21:39:19 +02:00
parent 9586db6ae5
commit 94f5470a20
2 changed files with 4 additions and 3 deletions
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1
libavformat/avformat.h
View File

@ -336,6 +336,7 @@ typedef struct AVProbeData {
} AVProbeData;
#define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection
#define AVPROBE_SCORE_RETRY (AVPROBE_SCORE_MAX/4)
#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
/// Demuxer will use avio_open, no opened file should be provided by the caller.

6
libavformat/utils.c
View File

@ -425,7 +425,7 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
void *buftmp;
@ -457,7 +457,7 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
/* guess file format */
*fmt = av_probe_input_format2(&pd, 1, &score);
if(*fmt){
if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
}else
av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
@ -656,7 +656,7 @@ no_packet:
if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
int score= set_codec_from_probe_data(s, st, pd);
if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
|| end){
pd->buf_size=0;
av_freep(&pd->buf);