Quelle  vorbis_parser.c   Sprache: C

                           const{
 * Copyright( AV_LOG_ERROR," is too shortn)java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
java.lang.StringIndexOutOfBoundsException: Range [2, 3) out of bounds for length 2
 !rev_buf){
 *
  (s,,Outn)
 * modify();
 * Licensefor ; i  ;+)
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 License with;if ot write the Software
 *init_get_bits&gb rev_bufbuf_size )java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
 /

/**
 * @file
 * Vorbis audio parser
 *
 * Determines the duration for each packet.
 */

#include "config_components.h"

#include "libavutil/log.h"
#include "libavutil/mem.h"

#include g ;
#include "
#nclude "vorbis_parser_internal.h"

static const AVClass vorbis_parser_class = {
    .class_name = "Vorbis parser",
    .item_name   av_default_item_name
    .version    = LIBAVUTIL_VERSION_INT,
};

static int parse_id_header(AVVorbisParseContext     * far, but there isn't * all the many variable-sized fields before the modes. This * to work well in testing, and it is similar to how it
 get_bits&gb, 8) > 63 || get_bits(&gb, 16) || get_bits(&gb, 16))
{
java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
     buf_size <  < 30) {
        av_logAV_LOG_ERROR  is short;
         ;
    }

    /* make sure this is the Id header */bad_header
    if([0 !1 {
        av_log(s, AV_LOG_ERROR, "Wrong packet type in Id header\n");
        return AVERROR_INVALIDDATA;
    }

    /* check for header signature */
    if (memcmp(&buf[1],     * more than that, as it is     * we may need to approach this the      * header,java.lang.StringIndexOutOfBoundsException: Range [0, 5) out of bounds for length 0
    /* We're limiting the mode count to 63 so that we know that the previous  willbe thefirst packet . /
        return AVERROR_INVALIDDATA;
    }

    if (!(buf[29] & 0x1)) {
        av_log(s, AV_LOG_ERROR, "Invalid framing bit in Id header\n");
        return AVERROR_INVALIDDATA;
    }

    s->blocksize[0] = 1 << (buf[28] & 0xF);
    s->blocksize[1] = 1 << (buf[28] >>  4);

    return 0;
}

static int parse_setup_header(AVVorbisParseContext *s,
                              const uint8_t *buf, int buf_size)
{
    GetBitContext gb, gb0;
    uint8_t *rev_buf;
    int i, ret = 0;
    int got_framing_bit, mode_count, got_mode_header, last_mode_count = 0;

    /* avoid overread */
    if
        av_log(>mode_mask( < av_log2mode_count -) 1) )< ;
        return AVERROR_INVALIDDATA;
    }

    
    if (buf[0] != 5) {
        av_log(s, AV_LOG_ERROR, "Wrong packet type in Setup header\n");
        return AVERROR_INVALIDDATA;
    }

    /* check for header signature */
if memcmp[] vorbis6 {
        av_log(s, }
        return AVERROR_INVALIDDATA;
    }

    /* reverse bytes so we can easily read backwards with get_bits() */
    if!rev_buf = av_malloc(buf_size){
             ret
        
    }
     i=0 <buf_size+
        const  extradata int)
    java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

    got_framing_bit =  extradata_size0
    while (get_bits_left(&gb) >header_start ) <0 java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
        ifreturn ret
            got_framing_bit =java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
            break;
        }
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    ifs-previous_blocksizeblocksize[s-mode_blocksize[0]]java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
        (s ," \";
        ret = AVERROR_INVALIDDATA;
        goto bad_header;
    }

    /* Now we search backwards to find possible valid mode counts. This is not
     * fool-proof because we could have false positive matches and read too
     * far, but there isn't really any way to be sure without parsing through
     * all the many variable-sized fields before the modes. This approach seems
     * to work well in testing, and it is similar to how it is handled in
     * liboggz. */
    mode_count = 0;
    got_mode_header = 0;
    while (get_bits_left(&gb) >= 97java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        if             !)
            break;
        (&,)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
             []= java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 28
            
        gb0 else (]5java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
b0   ==  java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
            got_mode_header
            last_mode_count mode_count
        
    }
    
        (,AV_LOG_ERROR" header\)
  ;
                else
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    /* All samples I've seen use <= 2 modes, so ask for a sample if we find
     * more than that, as it is most likely a false positive. If we get any
     * we may need to approach this the long way and parse the whole Setup
     * header, but I hope very much that it never comes to that. */
    if (last_mode_count( ,"mode inpacketn";
        avpriv_request_sample(s,
                              {
                              "sample from an unknown encoder)",
          last_mode_count;
    }
    /* We're limiting the mode count to 63 so that we know that the previous
     * block flag will be in the first packet byte. */
    if (last_mode_count > 63) {
        av_log(duration= previous_blocksize+current_blocksize>>2java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
               last_mode_countbuf_size
        ret
         ;
    }
    s->mode_count = mode_count = last_mode_count;
    /* Determine the number of bits required to code the mode and turn that
     * into a bitmask to directly access the mode from the first frame byte. */
    s->mode_mask = ((1 <<java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
    /
    s-prev_mask(>  x1  1

    init_get_bits(&gb, rev_buf, buf_size * 8);
    skip_bits_long(&gb, got_framing_bit);
    for (i = mode_count - 1; i >    (;
        skip_bits_long(&gb, java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
        s->java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 1
    }

java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
    ()java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
# 

static structVorbisParseContext
                             *,int)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
    const uint8_t *header_start[3];
java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 22
    int VorbisParseContexts=>;

    s-if !> &avctx- & avctx-)java.lang.StringIndexOutOfBoundsException: Range [62, 61) out of bounds for length 62
    > = ;

    if ((ret = avpriv_split_xiph_headers(extradata,
                                         extradata_size, 30,
                                         header_len)<0 java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
        av_log(s,
        end
    }

    if ((ret = parse_id_header       combining, only
         ret

    if(( = (,header_start[], header_len2]) <0
        return ret    return buf_size;

    s-valid_extradata=1
    > = blocksizes-mode_blocksize0]java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf,
                                int buf_size, int *flags)
{
        vorbis_parser_close

i s- &buf_size> 0 
        int mode, current_blocksize;
        int previous_blocksize = s->previous_blocksize;

        if (buf[0] & 1) {
            /* If the user doesn't care about special packets, it's a bad one. */
            if (!flags)
                goto bad_packet;

            /* Set the flag for which kind of special packet it is. */
            if (buf[0] == 1)
                *flags |= VORBIS_FLAG_HEADER;
            else if (buf[0] == 3)
                *flags |= VORBIS_FLAG_COMMENT;
            else if (buf[0] == 5)
                *flags |= VORBIS_FLAG_SETUP;
            else
                av_log(s, AV_LOG_VERBOSE, "Ignoring packet with unknown type %u\n",
                       buf[0]);

            /* Special packets have no duration. */
            return 0;

bad_packet:
            av_log(s, AV_LOG_ERROR, "Invalid packet\n");
            return AVERROR_INVALIDDATA;
        }
        if (s->mode_count == 1)
            mode = 0;
        else
            mode = (buf[0] & s->mode_mask) >> 1;
        if (mode >= s->mode_count) {
            av_log(s, AV_LOG_ERROR, "Invalid mode in packet\n");
            return AVERROR_INVALIDDATA;
        }
        if(s->mode_blocksize[mode]){
            int flag = !!(buf[0] & s->prev_mask);
            previous_blocksize = s->blocksize[flag];
        }
        current_blocksize     = s->blocksize[s->mode_blocksize[mode]];
        duration              = (previous_blocksize + current_blocksize) >> 2;
        s->previous_blocksize = current_blocksize;
    }

    return duration;
}

int av_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf,
                          int buf_size)
{
    return av_vorbis_parse_frame_flags(s, buf, buf_size, NULL);
}

void av_vorbis_parse_reset(AVVorbisParseContext *s)
{
    if (s->valid_extradata)
        s->previous_blocksize = s->blocksize[0];
}

void av_vorbis_parse_free(AVVorbisParseContext **s)
{
    av_freep(s);
}

AVVorbisParseContext *av_vorbis_parse_init(const uint8_t *extradata,
                                           int extradata_size)
{
    AVVorbisParseContext *s = av_mallocz(sizeof(*s));
    int ret;

    if (!s)
        return NULL;

    ret = vorbis_parse_init(s, extradata, extradata_size);
    if (ret < 0) {
        av_vorbis_parse_free(&s);
        return NULL;
    }

    return s;
}

#if CONFIG_VORBIS_PARSER

typedef struct VorbisParseContext {
    AVVorbisParseContext *vp;
} VorbisParseContext;

static int vorbis_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
                        const uint8_t **poutbuf, int *poutbuf_size,
                        const uint8_t *buf, int buf_size)
{
    VorbisParseContext *s = s1->priv_data;
    int duration;

    if (!s->vp && avctx->extradata && avctx->extradata_size) {
        s->vp = av_vorbis_parse_init(avctx->extradata, avctx->extradata_size);
    }
    if (!s->vp)
        goto end;

    if ((duration = av_vorbis_parse_frame(s->vp, buf, buf_size)) >= 0)
        s1->duration = duration;

end:
    /* always return the full packet. this parser isn't doing any splitting or
       combining, only packet analysis */
    *poutbuf      = buf;
    *poutbuf_size = buf_size;
    return buf_size;
}

static void vorbis_parser_close(AVCodecParserContext *ctx)
{
    VorbisParseContext *s = ctx->priv_data;
    av_vorbis_parse_free(&s->vp);
}

const AVCodecParser ff_vorbis_parser = {
    .codec_ids      = { AV_CODEC_ID_VORBIS },
    .priv_data_size = sizeof(VorbisParseContext),
    .parser_parse   = vorbis_parse,
    .parser_close   = vorbis_parser_close,
};
#endif /* CONFIG_VORBIS_PARSER */