776 lines
20 KiB
C
Executable File
776 lines
20 KiB
C
Executable File
/*
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* Vividas VIV format Demuxer
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* Copyright (c) 2012 Krzysztof Klinikowski
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* Copyright (c) 2010 Andrzej Szombierski
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* based on vivparse Copyright (c) 2007 Måns Rullgård
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* @brief Vividas VIV (.viv) file demuxer
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* @author Andrzej Szombierski [qq at kuku eu org] (2010-07)
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* @sa http://wiki.multimedia.cx/index.php?title=Vividas_VIV
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*/
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#include "libavutil/intreadwrite.h"
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#include "avio_internal.h"
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#include "avformat.h"
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#include "internal.h"
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#define MAX_AUDIO_SUBPACKETS 100
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typedef struct VIV_SB_block {
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int size, n_packets;
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int64_t byte_offset;
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int64_t packet_offset;
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} VIV_SB_block;
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typedef struct VIV_SB_entry {
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int size, flag;
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} VIV_SB_entry;
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typedef struct VIV_AudioSubpacket {
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int start, pcm_bytes;
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} VIV_AudioSubpacket;
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typedef struct VividasDemuxContext {
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int n_sb_blocks;
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VIV_SB_block *sb_blocks;
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int num_audio;
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uint32_t sb_key;
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int64_t sb_offset;
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int current_sb, current_sb_entry;
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uint8_t *sb_buf;
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AVIOContext *sb_pb;
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int n_sb_entries;
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VIV_SB_entry *sb_entries;
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int n_audio_subpackets;
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int current_audio_subpacket;
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int64_t audio_sample;
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VIV_AudioSubpacket audio_subpackets[MAX_AUDIO_SUBPACKETS];
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} VividasDemuxContext;
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static int viv_probe(const AVProbeData *p)
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{
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if (memcmp(p->buf, "vividas03", 9))
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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static const uint8_t keybits[32] = {
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20, 52, 111, 10, 27, 71, 142, 53,
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82, 138, 1, 78, 86, 121, 183, 85,
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105, 152, 39, 140, 172, 11, 64, 144,
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155, 6, 71, 163, 186, 49, 126, 43,
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};
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static uint32_t decode_key(uint8_t *buf)
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{
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uint32_t key = 0;
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for (int i = 0; i < 32; i++) {
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unsigned p = keybits[i];
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key |= ((buf[p] >> ((i*5+3)&7)) & 1u) << i;
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}
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return key;
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}
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static void put_v(uint8_t *p, unsigned v)
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{
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if (v>>28)
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*p++ = ((v>>28)&0x7f)|0x80;
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if (v>>21)
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*p++ = ((v>>21)&0x7f)|0x80;
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if (v>>14)
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*p++ = ((v>>14)&0x7f)|0x80;
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if (v>>7)
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*p++ = ((v>>7)&0x7f)|0x80;
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}
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static unsigned recover_key(unsigned char sample[4], unsigned expected_size)
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{
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unsigned char plaintext[8] = { 'S', 'B' };
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put_v(plaintext+2, expected_size);
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return AV_RL32(sample) ^ AV_RL32(plaintext);
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}
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static void xor_block(void *p1, void *p2, unsigned size, int key, unsigned *key_ptr)
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{
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unsigned *d1 = p1;
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unsigned *d2 = p2;
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unsigned k = *key_ptr;
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size >>= 2;
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while (size > 0) {
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*d2 = *d1 ^ (HAVE_BIGENDIAN ? av_bswap32(k) : k);
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k += key;
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d1++;
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d2++;
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size--;
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}
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*key_ptr = k;
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}
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static void decode_block(uint8_t *src, uint8_t *dest, unsigned size,
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uint32_t key, uint32_t *key_ptr,
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int align)
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{
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unsigned s = size;
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char tmp[4];
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int a2;
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if (!size)
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return;
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align &= 3;
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a2 = (4 - align) & 3;
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if (align) {
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uint32_t tmpkey = *key_ptr - key;
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if (a2 > s) {
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a2 = s;
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avpriv_request_sample(NULL, "tiny aligned block\n");
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}
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memcpy(tmp + align, src, a2);
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xor_block(tmp, tmp, 4, key, &tmpkey);
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memcpy(dest, tmp + align, a2);
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s -= a2;
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}
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if (s >= 4) {
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xor_block(src + a2, dest + a2, s & ~3,
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key, key_ptr);
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s &= 3;
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}
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if (s) {
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size -= s;
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memcpy(tmp, src + size, s);
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xor_block(&tmp, &tmp, 4, key, key_ptr);
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memcpy(dest + size, tmp, s);
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}
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}
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static uint32_t get_v(uint8_t *p, int len)
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{
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uint32_t v = 0;
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const uint8_t *end = p + len;
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do {
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if (p >= end || v >= UINT_MAX / 128 - *p)
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return v;
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v <<= 7;
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v += *p & 0x7f;
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} while (*p++ & 0x80);
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return v;
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}
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static uint8_t *read_vblock(AVIOContext *src, uint32_t *size,
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uint32_t key, uint32_t *k2, int align)
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{
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uint8_t tmp[4];
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uint8_t *buf;
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unsigned n;
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if (avio_read(src, tmp, 4) != 4)
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return NULL;
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decode_block(tmp, tmp, 4, key, k2, align);
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n = get_v(tmp, 4);
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if (n < 4)
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return NULL;
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buf = av_malloc(n);
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if (!buf)
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return NULL;
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*size = n;
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n -= 4;
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memcpy(buf, tmp, 4);
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if (avio_read(src, buf + 4, n) == n) {
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decode_block(buf + 4, buf + 4, n, key, k2, align);
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} else {
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av_free(buf);
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buf = NULL;
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}
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return buf;
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}
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static uint8_t *read_sb_block(AVIOContext *src, unsigned *size,
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uint32_t *key, unsigned expected_size)
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{
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uint8_t *buf;
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uint8_t ibuf[8], sbuf[8];
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uint32_t k2;
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unsigned n;
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if (avio_read(src, ibuf, 8) < 8)
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return NULL;
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k2 = *key;
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decode_block(ibuf, sbuf, 8, *key, &k2, 0);
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n = get_v(sbuf+2, 6);
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if (sbuf[0] != 'S' || sbuf[1] != 'B' || (expected_size>0 && n != expected_size)) {
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uint32_t tmpkey = recover_key(ibuf, expected_size);
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k2 = tmpkey;
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decode_block(ibuf, sbuf, 8, tmpkey, &k2, 0);
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n = get_v(sbuf+2, 6);
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if (sbuf[0] != 'S' || sbuf[1] != 'B' || expected_size != n)
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return NULL;
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*key = tmpkey;
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}
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if (n < 8)
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return NULL;
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buf = av_malloc(n);
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if (!buf)
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return NULL;
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memcpy(buf, sbuf, 8);
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*size = n;
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n -= 8;
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if (avio_read(src, buf+8, n) < n) {
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av_free(buf);
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return NULL;
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}
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decode_block(buf + 8, buf + 8, n, *key, &k2, 0);
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return buf;
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}
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static int track_header(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *buf, int size)
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{
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int i, j, ret;
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int64_t off;
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int val_1;
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int num_video;
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AVIOContext pb0, *pb = &pb0;
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ffio_init_context(pb, buf, size, 0, NULL, NULL, NULL, NULL);
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ffio_read_varlen(pb); // track_header_len
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avio_r8(pb); // '1'
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val_1 = ffio_read_varlen(pb);
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for (i=0;i<val_1;i++) {
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int c = avio_r8(pb);
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for (j=0;j<c;j++) {
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if (avio_feof(pb))
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return AVERROR_EOF;
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avio_r8(pb); // val_3
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avio_r8(pb); // val_4
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}
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}
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avio_r8(pb); // num_streams
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off = avio_tell(pb);
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off += ffio_read_varlen(pb); // val_5
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avio_r8(pb); // '2'
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num_video = avio_r8(pb);
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avio_seek(pb, off, SEEK_SET);
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if (num_video != 1) {
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av_log(s, AV_LOG_ERROR, "number of video tracks %d is not 1\n", num_video);
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return AVERROR_PATCHWELCOME;
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}
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for (i = 0; i < num_video; i++) {
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->id = i;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_VP6;
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off = avio_tell(pb);
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off += ffio_read_varlen(pb);
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avio_r8(pb); // '3'
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avio_r8(pb); // val_7
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st->time_base.num = avio_rl32(pb); // frame_time
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st->time_base.den = avio_rl32(pb); // time_base
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st->nb_frames = avio_rl32(pb); // n frames
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st->codecpar->width = avio_rl16(pb); // width
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st->codecpar->height = avio_rl16(pb); // height
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avio_r8(pb); // val_8
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avio_rl32(pb); // val_9
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avio_seek(pb, off, SEEK_SET);
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}
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off = avio_tell(pb);
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off += ffio_read_varlen(pb); // val_10
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avio_r8(pb); // '4'
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viv->num_audio = avio_r8(pb);
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avio_seek(pb, off, SEEK_SET);
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if (viv->num_audio != 1)
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av_log(s, AV_LOG_WARNING, "number of audio tracks %d is not 1\n", viv->num_audio);
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for(i=0;i<viv->num_audio;i++) {
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int q;
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->id = num_video + i;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_VORBIS;
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off = avio_tell(pb);
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off += ffio_read_varlen(pb); // length
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avio_r8(pb); // '5'
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avio_r8(pb); //codec_id
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avio_rl16(pb); //codec_subid
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st->codecpar->channels = avio_rl16(pb); // channels
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st->codecpar->sample_rate = avio_rl32(pb); // sample_rate
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avio_seek(pb, 10, SEEK_CUR); // data_1
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q = avio_r8(pb);
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avio_seek(pb, q, SEEK_CUR); // data_2
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avio_r8(pb); // zeropad
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if (avio_tell(pb) < off) {
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int num_data;
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int xd_size = 0;
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int data_len[256];
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int offset = 1;
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uint8_t *p;
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ffio_read_varlen(pb); // val_13
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avio_r8(pb); // '19'
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ffio_read_varlen(pb); // len_3
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num_data = avio_r8(pb);
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for (j = 0; j < num_data; j++) {
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uint64_t len = ffio_read_varlen(pb);
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if (len > INT_MAX/2 - xd_size) {
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return AVERROR_INVALIDDATA;
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}
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data_len[j] = len;
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xd_size += len;
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}
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ret = ff_alloc_extradata(st->codecpar, 64 + xd_size + xd_size / 255);
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if (ret < 0)
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return ret;
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p = st->codecpar->extradata;
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p[0] = 2;
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for (j = 0; j < num_data - 1; j++) {
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unsigned delta = av_xiphlacing(&p[offset], data_len[j]);
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if (delta > data_len[j]) {
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return AVERROR_INVALIDDATA;
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}
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offset += delta;
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}
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for (j = 0; j < num_data; j++) {
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int ret = avio_read(pb, &p[offset], data_len[j]);
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if (ret < data_len[j]) {
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st->codecpar->extradata_size = 0;
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av_freep(&st->codecpar->extradata);
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break;
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}
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offset += data_len[j];
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}
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if (offset < st->codecpar->extradata_size)
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st->codecpar->extradata_size = offset;
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}
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}
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return 0;
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}
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static int track_index(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *buf, unsigned size)
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{
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int64_t off;
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int64_t poff;
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int maxnp=0;
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AVIOContext pb0, *pb = &pb0;
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int i;
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int64_t filesize = avio_size(s->pb);
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ffio_init_context(pb, buf, size, 0, NULL, NULL, NULL, NULL);
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ffio_read_varlen(pb); // track_index_len
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avio_r8(pb); // 'c'
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viv->n_sb_blocks = ffio_read_varlen(pb);
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if (viv->n_sb_blocks < 0 || viv->n_sb_blocks > size / 2)
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goto error;
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viv->sb_blocks = av_calloc(viv->n_sb_blocks, sizeof(VIV_SB_block));
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if (!viv->sb_blocks) {
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viv->n_sb_blocks = 0;
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return AVERROR(ENOMEM);
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}
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off = 0;
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poff = 0;
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for (i = 0; i < viv->n_sb_blocks; i++) {
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uint64_t size_tmp = ffio_read_varlen(pb);
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uint64_t n_packets_tmp = ffio_read_varlen(pb);
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if (size_tmp > INT_MAX || n_packets_tmp > INT_MAX)
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goto error;
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viv->sb_blocks[i].byte_offset = off;
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viv->sb_blocks[i].packet_offset = poff;
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viv->sb_blocks[i].size = size_tmp;
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viv->sb_blocks[i].n_packets = n_packets_tmp;
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off += viv->sb_blocks[i].size;
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poff += viv->sb_blocks[i].n_packets;
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if (maxnp < viv->sb_blocks[i].n_packets)
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maxnp = viv->sb_blocks[i].n_packets;
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}
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if (filesize > 0 && poff > filesize)
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goto error;
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viv->sb_entries = av_calloc(maxnp, sizeof(VIV_SB_entry));
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return 0;
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error:
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viv->n_sb_blocks = 0;
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av_freep(&viv->sb_blocks);
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return AVERROR_INVALIDDATA;
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}
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static void load_sb_block(AVFormatContext *s, VividasDemuxContext *viv, unsigned expected_size)
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{
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uint32_t size = 0;
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int i;
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AVIOContext *pb = 0;
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if (viv->sb_pb) {
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av_free(viv->sb_pb);
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viv->sb_pb = NULL;
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}
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if (viv->sb_buf)
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av_free(viv->sb_buf);
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viv->sb_buf = read_sb_block(s->pb, &size, &viv->sb_key, expected_size);
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if (!viv->sb_buf) {
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return;
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}
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pb = avio_alloc_context(viv->sb_buf, size, 0, NULL, NULL, NULL, NULL);
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if (!pb)
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return;
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viv->sb_pb = pb;
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avio_r8(pb); // 'S'
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avio_r8(pb); // 'B'
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ffio_read_varlen(pb); // size
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avio_r8(pb); // junk
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ffio_read_varlen(pb); // first packet
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viv->n_sb_entries = viv->sb_blocks[viv->current_sb].n_packets;
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for (i = 0; i < viv->n_sb_entries; i++) {
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viv->sb_entries[i].size = ffio_read_varlen(pb);
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viv->sb_entries[i].flag = avio_r8(pb);
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}
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ffio_read_varlen(pb);
|
|
avio_r8(pb);
|
|
|
|
viv->current_sb_entry = 0;
|
|
}
|
|
|
|
static int viv_read_header(AVFormatContext *s)
|
|
{
|
|
VividasDemuxContext *viv = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int64_t header_end;
|
|
int num_tracks;
|
|
uint32_t key, k2;
|
|
uint32_t v;
|
|
uint8_t keybuffer[187];
|
|
uint32_t b22_size = 0;
|
|
uint32_t b22_key = 0;
|
|
uint8_t *buf = 0;
|
|
int ret;
|
|
|
|
avio_skip(pb, 9);
|
|
|
|
header_end = avio_tell(pb);
|
|
|
|
header_end += ffio_read_varlen(pb);
|
|
|
|
num_tracks = avio_r8(pb);
|
|
|
|
if (num_tracks != 1) {
|
|
av_log(s, AV_LOG_ERROR, "number of tracks %d is not 1\n", num_tracks);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
v = avio_r8(pb);
|
|
avio_seek(pb, v, SEEK_CUR);
|
|
|
|
avio_read(pb, keybuffer, 187);
|
|
key = decode_key(keybuffer);
|
|
viv->sb_key = key;
|
|
|
|
avio_rl32(pb);
|
|
|
|
for (;;) {
|
|
int64_t here = avio_tell(pb);
|
|
int block_len, block_type;
|
|
|
|
if (here >= header_end)
|
|
break;
|
|
|
|
block_len = ffio_read_varlen(pb);
|
|
if (avio_feof(pb) || block_len <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
block_type = avio_r8(pb);
|
|
|
|
if (block_type == 22) {
|
|
avio_read(pb, keybuffer, 187);
|
|
b22_key = decode_key(keybuffer);
|
|
b22_size = avio_rl32(pb);
|
|
}
|
|
|
|
avio_seek(pb, here + block_len, SEEK_SET);
|
|
}
|
|
|
|
if (b22_size) {
|
|
k2 = b22_key;
|
|
buf = read_vblock(pb, &v, b22_key, &k2, 0);
|
|
if (!buf)
|
|
return AVERROR(EIO);
|
|
|
|
av_free(buf);
|
|
}
|
|
|
|
k2 = key;
|
|
buf = read_vblock(pb, &v, key, &k2, 0);
|
|
if (!buf)
|
|
return AVERROR(EIO);
|
|
ret = track_header(viv, s, buf, v);
|
|
av_free(buf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
buf = read_vblock(pb, &v, key, &k2, v);
|
|
if (!buf)
|
|
return AVERROR(EIO);
|
|
ret = track_index(viv, s, buf, v);
|
|
av_free(buf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
viv->sb_offset = avio_tell(pb);
|
|
if (viv->n_sb_blocks > 0) {
|
|
viv->current_sb = 0;
|
|
load_sb_block(s, viv, viv->sb_blocks[0].size);
|
|
} else {
|
|
viv->current_sb = -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int viv_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
VividasDemuxContext *viv = s->priv_data;
|
|
AVIOContext *pb;
|
|
int64_t off;
|
|
int ret;
|
|
|
|
if (!viv->sb_pb)
|
|
return AVERROR(EIO);
|
|
if (avio_feof(viv->sb_pb))
|
|
return AVERROR_EOF;
|
|
|
|
if (viv->current_audio_subpacket < viv->n_audio_subpackets) {
|
|
AVStream *astream;
|
|
int size = viv->audio_subpackets[viv->current_audio_subpacket+1].start - viv->audio_subpackets[viv->current_audio_subpacket].start;
|
|
|
|
pb = viv->sb_pb;
|
|
ret = av_get_packet(pb, pkt, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
pkt->pos += viv->sb_offset + viv->sb_blocks[viv->current_sb].byte_offset;
|
|
|
|
pkt->stream_index = 1;
|
|
astream = s->streams[pkt->stream_index];
|
|
|
|
pkt->pts = av_rescale_q(viv->audio_sample, av_make_q(1, astream->codecpar->sample_rate), astream->time_base);
|
|
viv->audio_sample += viv->audio_subpackets[viv->current_audio_subpacket].pcm_bytes / 2 / astream->codecpar->channels;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
viv->current_audio_subpacket++;
|
|
return 0;
|
|
}
|
|
|
|
if (viv->current_sb_entry >= viv->n_sb_entries) {
|
|
if (viv->current_sb+1 >= viv->n_sb_blocks)
|
|
return AVERROR(EIO);
|
|
viv->current_sb++;
|
|
|
|
load_sb_block(s, viv, 0);
|
|
viv->current_sb_entry = 0;
|
|
}
|
|
|
|
pb = viv->sb_pb;
|
|
if (!pb)
|
|
return AVERROR(EIO);
|
|
off = avio_tell(pb);
|
|
off += viv->sb_entries[viv->current_sb_entry].size;
|
|
|
|
if (viv->sb_entries[viv->current_sb_entry].flag == 0) {
|
|
uint64_t v_size = ffio_read_varlen(pb);
|
|
|
|
if (!viv->num_audio)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
ffio_read_varlen(pb);
|
|
if (v_size > INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
ret = av_get_packet(pb, pkt, v_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
pkt->pos += viv->sb_offset + viv->sb_blocks[viv->current_sb].byte_offset;
|
|
|
|
pkt->pts = viv->sb_blocks[viv->current_sb].packet_offset + viv->current_sb_entry;
|
|
pkt->flags |= (pkt->data[0]&0x80)?0:AV_PKT_FLAG_KEY;
|
|
pkt->stream_index = 0;
|
|
|
|
for (int i = 0; i < MAX_AUDIO_SUBPACKETS - 1; i++) {
|
|
int start, pcm_bytes;
|
|
start = ffio_read_varlen(pb);
|
|
pcm_bytes = ffio_read_varlen(pb);
|
|
|
|
if (i > 0 && start == 0)
|
|
break;
|
|
|
|
viv->n_audio_subpackets = i + 1;
|
|
viv->audio_subpackets[i].start = start;
|
|
viv->audio_subpackets[i].pcm_bytes = pcm_bytes;
|
|
}
|
|
viv->audio_subpackets[viv->n_audio_subpackets].start = (int)(off - avio_tell(pb));
|
|
viv->current_audio_subpacket = 0;
|
|
|
|
} else {
|
|
uint64_t v_size = ffio_read_varlen(pb);
|
|
|
|
if (v_size > INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
ret = av_get_packet(pb, pkt, v_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
pkt->pos += viv->sb_offset + viv->sb_blocks[viv->current_sb].byte_offset;
|
|
pkt->pts = viv->sb_blocks[viv->current_sb].packet_offset + viv->current_sb_entry;
|
|
pkt->flags |= (pkt->data[0] & 0x80) ? 0 : AV_PKT_FLAG_KEY;
|
|
pkt->stream_index = 0;
|
|
}
|
|
|
|
viv->current_sb_entry++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int viv_read_close(AVFormatContext *s)
|
|
{
|
|
VividasDemuxContext *viv = s->priv_data;
|
|
|
|
av_freep(&viv->sb_pb);
|
|
av_freep(&viv->sb_buf);
|
|
av_freep(&viv->sb_blocks);
|
|
av_freep(&viv->sb_entries);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int viv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
VividasDemuxContext *viv = s->priv_data;
|
|
int64_t frame;
|
|
|
|
if (stream_index == 0)
|
|
frame = timestamp;
|
|
else
|
|
frame = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[stream_index]->time_base);
|
|
|
|
for (int i = 0; i < viv->n_sb_blocks; i++) {
|
|
if (frame >= viv->sb_blocks[i].packet_offset && frame < viv->sb_blocks[i].packet_offset + viv->sb_blocks[i].n_packets) {
|
|
// flush audio packet queue
|
|
viv->current_audio_subpacket = 0;
|
|
viv->n_audio_subpackets = 0;
|
|
viv->current_sb = i;
|
|
// seek to ith sb block
|
|
avio_seek(s->pb, viv->sb_offset + viv->sb_blocks[i].byte_offset, SEEK_SET);
|
|
// load the block
|
|
load_sb_block(s, viv, 0);
|
|
// most problematic part: guess audio offset
|
|
viv->audio_sample = av_rescale_q(viv->sb_blocks[i].packet_offset, av_make_q(s->streams[1]->codecpar->sample_rate, 1), av_inv_q(s->streams[0]->time_base));
|
|
// hand-tuned 1.s a/v offset
|
|
viv->audio_sample += s->streams[1]->codecpar->sample_rate;
|
|
viv->current_sb_entry = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_vividas_demuxer = {
|
|
.name = "vividas",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Vividas VIV"),
|
|
.priv_data_size = sizeof(VividasDemuxContext),
|
|
.read_probe = viv_probe,
|
|
.read_header = viv_read_header,
|
|
.read_packet = viv_read_packet,
|
|
.read_close = viv_read_close,
|
|
.read_seek = viv_read_seek,
|
|
};
|