int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,

                          const char *filename, void *logctx,

                          unsigned int offset, unsigned int max_probe_size)

{

    AVProbeData pd = { filename ? filename : "", NULL, -offset };

    unsigned char *buf = NULL;

    int ret = 0, probe_size;



    if (!max_probe_size) {

        max_probe_size = PROBE_BUF_MAX;

    } else if (max_probe_size > PROBE_BUF_MAX) {

        max_probe_size = PROBE_BUF_MAX;

    } else if (max_probe_size < PROBE_BUF_MIN) {

        return AVERROR(EINVAL);

    }



    if (offset >= max_probe_size) {

        return AVERROR(EINVAL);

    }



    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_RETRY : 0;

        int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;

        void *buftmp;



        if (probe_size < offset) {

            continue;

        }



        /* read probe data */

        buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);

        if(!buftmp){

            av_free(buf);

            return AVERROR(ENOMEM);

        }

        buf=buftmp;

        if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {

            /* fail if error was not end of file, otherwise, lower score */

            if (ret != AVERROR_EOF) {

                av_free(buf);

                return ret;

            }

            score = 0;

            ret = 0;            /* error was end of file, nothing read */

        }

        pd.buf_size += ret;

        pd.buf = &buf[offset];



        memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);



        /* guess file format */

        *fmt = av_probe_input_format2(&pd, 1, &score);

        if(*fmt){

            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);

        }

    }



    if (!*fmt) {

        av_free(buf);

        return AVERROR_INVALIDDATA;

    }



    /* rewind. reuse probe buffer to avoid seeking */

    ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);



    return ret;

}

int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,

                          const char *filename, void *logctx,

                          unsigned int offset, unsigned int max_probe_size)

{

    AVProbeData pd = { filename ? filename : "", NULL, -offset };

    unsigned char *buf = NULL;

    int ret = 0, probe_size;



    if (!max_probe_size) {

        max_probe_size = PROBE_BUF_MAX;

    } else if (max_probe_size > PROBE_BUF_MAX) {

        max_probe_size = PROBE_BUF_MAX;

    } else if (max_probe_size < PROBE_BUF_MIN) {

        return AVERROR(EINVAL);

    }



    if (offset >= max_probe_size) {

        return AVERROR(EINVAL);

    }



    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_RETRY : 0;

        int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;

        void *buftmp;



        if (probe_size < offset) {

            continue;

        }



        

        buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);

        if(!buftmp){

            av_free(buf);

            return AVERROR(ENOMEM);

        }

        buf=buftmp;

        if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {

            

            if (ret != AVERROR_EOF) {

                av_free(buf);

                return ret;

            }

            score = 0;

            ret = 0;            

        }

        pd.buf_size += ret;

        pd.buf = &buf[offset];



        memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);



        

        *fmt = av_probe_input_format2(&pd, 1, &score);

        if(*fmt){

            if(score <= AVPROBE_SCORE_RETRY){ 

                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);

        }

    }



    if (!*fmt) {

        av_free(buf);

        return AVERROR_INVALIDDATA;

    }



    

    ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);



    return ret;

}

int FUNC_0(AVIOContext *VAR_0, AVInputFormat **VAR_1,

                          const char *VAR_2, void *VAR_3,

                          unsigned int VAR_4, unsigned int VAR_5)

{

    AVProbeData pd = { VAR_2 ? VAR_2 : "", NULL, -VAR_4 };

    unsigned char *VAR_6 = NULL;

    int VAR_7 = 0, VAR_8;



    if (!VAR_5) {

        VAR_5 = PROBE_BUF_MAX;

    } else if (VAR_5 > PROBE_BUF_MAX) {

        VAR_5 = PROBE_BUF_MAX;

    } else if (VAR_5 < PROBE_BUF_MIN) {

        return AVERROR(EINVAL);

    }



    if (VAR_4 >= VAR_5) {

        return AVERROR(EINVAL);

    }



    for(VAR_8= PROBE_BUF_MIN; VAR_8<=VAR_5 && !*VAR_1;

        VAR_8 = FFMIN(VAR_8<<1, FFMAX(VAR_5, VAR_8+1))) {

        int score = VAR_8 < VAR_5 ? AVPROBE_SCORE_RETRY : 0;

        int buf_offset = (VAR_8 == PROBE_BUF_MIN) ? 0 : VAR_8>>1;

        void *buftmp;



        if (VAR_8 < VAR_4) {

            continue;

        }



        

        buftmp = av_realloc(VAR_6, VAR_8 + AVPROBE_PADDING_SIZE);

        if(!buftmp){

            av_free(VAR_6);

            return AVERROR(ENOMEM);

        }

        VAR_6=buftmp;

        if ((VAR_7 = avio_read(VAR_0, VAR_6 + buf_offset, VAR_8 - buf_offset)) < 0) {

            

            if (VAR_7 != AVERROR_EOF) {

                av_free(VAR_6);

                return VAR_7;

            }

            score = 0;

            VAR_7 = 0;            

        }

        pd.buf_size += VAR_7;

        pd.VAR_6 = &VAR_6[VAR_4];



        memset(pd.VAR_6 + pd.buf_size, 0, AVPROBE_PADDING_SIZE);



        

        *VAR_1 = av_probe_input_format2(&pd, 1, &score);

        if(*VAR_1){

            if(score <= AVPROBE_SCORE_RETRY){ 

                av_log(VAR_3, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*VAR_1)->name, score);

            }else

                av_log(VAR_3, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*VAR_1)->name, VAR_8, score);

        }

    }



    if (!*VAR_1) {

        av_free(VAR_6);

        return AVERROR_INVALIDDATA;

    }



    

    VAR_7 = ffio_rewind_with_probe_data(VAR_0, &VAR_6, pd.buf_size);



    return VAR_7;

}

int FUNC_0(AVIOContext *VAR_0, AVInputFormat **VAR_1,
const char *VAR_2, void *VAR_3,
unsigned int VAR_4, unsigned int VAR_5)
{ AVProbeData pd = { VAR_2 ? VAR_2 : "", NULL, -VAR_4 }; unsigned char *VAR_6 = NULL; int VAR_7 = 0, VAR_8; if (!VAR_5) { VAR_5 = PROBE_BUF_MAX; } else if (VAR_5 > PROBE_BUF_MAX) { VAR_5 = PROBE_BUF_MAX; } else if (VAR_5 < PROBE_BUF_MIN) { return AVERROR(EINVAL); } if (VAR_4 >= VAR_5) { return AVERROR(EINVAL); } for(VAR_8= PROBE_BUF_MIN; VAR_8<=VAR_5 && !*VAR_1; VAR_8 = FFMIN(VAR_8<<1, FFMAX(VAR_5, VAR_8+1))) { int score = VAR_8 < VAR_5 ? AVPROBE_SCORE_RETRY : 0; int buf_offset = (VAR_8 == PROBE_BUF_MIN) ? 0 : VAR_8>>1; void *buftmp; if (VAR_8 < VAR_4) { continue; } buftmp = av_realloc(VAR_6, VAR_8 + AVPROBE_PADDING_SIZE); if(!buftmp){ av_free(VAR_6); return AVERROR(ENOMEM); } VAR_6=buftmp; if ((VAR_7 = avio_read(VAR_0, VAR_6 + buf_offset, VAR_8 - buf_offset)) < 0) { if (VAR_7 != AVERROR_EOF) { av_free(VAR_6); return VAR_7; } score = 0; VAR_7 = 0; } pd.buf_size += VAR_7; pd.VAR_6 = &VAR_6[VAR_4]; memset(pd.VAR_6 + pd.buf_size, 0, AVPROBE_PADDING_SIZE); *VAR_1 = av_probe_input_format2(&pd, 1, &score); if(*VAR_1){ if(score <= AVPROBE_SCORE_RETRY){ av_log(VAR_3, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*VAR_1)->name, score); }else av_log(VAR_3, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*VAR_1)->name, VAR_8, score); } } if (!*VAR_1) { av_free(VAR_6); return AVERROR_INVALIDDATA; } VAR_7 = ffio_rewind_with_probe_data(VAR_0, &VAR_6, pd.buf_size); return VAR_7; }