mirror of
https://git.ffmpeg.org/ffmpeg.git
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717 lines
21 KiB
C
717 lines
21 KiB
C
/*
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* Smacker decoder
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* Copyright (c) 2006 Konstantin Shishkov
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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 smacker.c
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* Smacker decoder
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*/
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/*
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* Based on http://wiki.multimedia.cx/index.php?title=Smacker
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "avcodec.h"
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#define ALT_BITSTREAM_READER_LE
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#include "bitstream.h"
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#define SMKTREE_BITS 9
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#define SMK_NODE 0x80000000
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/*
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* Decoder context
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*/
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typedef struct SmackVContext {
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AVCodecContext *avctx;
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AVFrame pic;
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int *mmap_tbl, *mclr_tbl, *full_tbl, *type_tbl;
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int mmap_last[3], mclr_last[3], full_last[3], type_last[3];
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} SmackVContext;
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/**
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* Context used for code reconstructing
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*/
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typedef struct HuffContext {
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int length;
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int maxlength;
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int current;
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uint32_t *bits;
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int *lengths;
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int *values;
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} HuffContext;
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/* common parameters used for decode_bigtree */
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typedef struct DBCtx {
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VLC *v1, *v2;
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int *recode1, *recode2;
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int escapes[3];
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int *last;
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int lcur;
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} DBCtx;
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/* possible runs of blocks */
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static const int block_runs[64] = {
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1, 2, 3, 4, 5, 6, 7, 8,
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9, 10, 11, 12, 13, 14, 15, 16,
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17, 18, 19, 20, 21, 22, 23, 24,
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25, 26, 27, 28, 29, 30, 31, 32,
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33, 34, 35, 36, 37, 38, 39, 40,
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41, 42, 43, 44, 45, 46, 47, 48,
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49, 50, 51, 52, 53, 54, 55, 56,
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57, 58, 59, 128, 256, 512, 1024, 2048 };
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enum SmkBlockTypes {
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SMK_BLK_MONO = 0,
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SMK_BLK_FULL = 1,
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SMK_BLK_SKIP = 2,
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SMK_BLK_FILL = 3 };
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/**
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* Decode local frame tree
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*/
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static int smacker_decode_tree(GetBitContext *gb, HuffContext *hc, uint32_t prefix, int length)
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{
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if(!get_bits1(gb)){ //Leaf
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if(hc->current >= 256){
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av_log(NULL, AV_LOG_ERROR, "Tree size exceeded!\n");
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return -1;
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}
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if(length){
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hc->bits[hc->current] = prefix;
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hc->lengths[hc->current] = length;
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} else {
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hc->bits[hc->current] = 0;
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hc->lengths[hc->current] = 0;
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}
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hc->values[hc->current] = get_bits(gb, 8);
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hc->current++;
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if(hc->maxlength < length)
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hc->maxlength = length;
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return 0;
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} else { //Node
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int r;
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length++;
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r = smacker_decode_tree(gb, hc, prefix, length);
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if(r)
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return r;
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return smacker_decode_tree(gb, hc, prefix | (1 << (length - 1)), length);
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}
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}
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/**
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* Decode header tree
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*/
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static int smacker_decode_bigtree(GetBitContext *gb, HuffContext *hc, DBCtx *ctx)
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{
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if(!get_bits1(gb)){ //Leaf
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int val, i1, i2, b1, b2;
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if(hc->current >= hc->length){
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av_log(NULL, AV_LOG_ERROR, "Tree size exceeded!\n");
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return -1;
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}
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b1 = get_bits_count(gb);
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i1 = get_vlc2(gb, ctx->v1->table, SMKTREE_BITS, 3);
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b1 = get_bits_count(gb) - b1;
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b2 = get_bits_count(gb);
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i2 = get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3);
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b2 = get_bits_count(gb) - b2;
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val = ctx->recode1[i1] | (ctx->recode2[i2] << 8);
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if(val == ctx->escapes[0]) {
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ctx->last[0] = hc->current;
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val = 0;
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} else if(val == ctx->escapes[1]) {
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ctx->last[1] = hc->current;
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val = 0;
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} else if(val == ctx->escapes[2]) {
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ctx->last[2] = hc->current;
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val = 0;
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}
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hc->values[hc->current++] = val;
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return 1;
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} else { //Node
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int r = 0, t;
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t = hc->current++;
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r = smacker_decode_bigtree(gb, hc, ctx);
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if(r < 0)
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return r;
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hc->values[t] = SMK_NODE | r;
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r++;
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r += smacker_decode_bigtree(gb, hc, ctx);
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return r;
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}
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}
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/**
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* Store large tree as FFmpeg's vlc codes
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*/
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static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int **recodes, int *last, int size)
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{
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int res;
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HuffContext huff;
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HuffContext tmp1, tmp2;
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VLC vlc[2];
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int escapes[3];
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DBCtx ctx;
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if(size >= UINT_MAX>>4){ // (((size + 3) >> 2) + 3) << 2 must not overflow
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av_log(smk->avctx, AV_LOG_ERROR, "size too large\n");
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return -1;
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}
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tmp1.length = 256;
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tmp1.maxlength = 0;
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tmp1.current = 0;
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tmp1.bits = av_mallocz(256 * 4);
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tmp1.lengths = av_mallocz(256 * sizeof(int));
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tmp1.values = av_mallocz(256 * sizeof(int));
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tmp2.length = 256;
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tmp2.maxlength = 0;
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tmp2.current = 0;
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tmp2.bits = av_mallocz(256 * 4);
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tmp2.lengths = av_mallocz(256 * sizeof(int));
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tmp2.values = av_mallocz(256 * sizeof(int));
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memset(&vlc[0], 0, sizeof(VLC));
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memset(&vlc[1], 0, sizeof(VLC));
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if(get_bits1(gb)) {
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smacker_decode_tree(gb, &tmp1, 0, 0);
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skip_bits1(gb);
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res = init_vlc(&vlc[0], SMKTREE_BITS, tmp1.length,
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tmp1.lengths, sizeof(int), sizeof(int),
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tmp1.bits, sizeof(uint32_t), sizeof(uint32_t), INIT_VLC_LE);
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if(res < 0) {
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av_log(smk->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
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return -1;
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}
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} else {
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av_log(smk->avctx, AV_LOG_ERROR, "Skipping low bytes tree\n");
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}
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if(get_bits1(gb)){
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smacker_decode_tree(gb, &tmp2, 0, 0);
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skip_bits1(gb);
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res = init_vlc(&vlc[1], SMKTREE_BITS, tmp2.length,
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tmp2.lengths, sizeof(int), sizeof(int),
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tmp2.bits, sizeof(uint32_t), sizeof(uint32_t), INIT_VLC_LE);
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if(res < 0) {
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av_log(smk->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
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return -1;
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}
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} else {
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av_log(smk->avctx, AV_LOG_ERROR, "Skipping high bytes tree\n");
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}
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escapes[0] = get_bits(gb, 8);
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escapes[0] |= get_bits(gb, 8) << 8;
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escapes[1] = get_bits(gb, 8);
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escapes[1] |= get_bits(gb, 8) << 8;
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escapes[2] = get_bits(gb, 8);
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escapes[2] |= get_bits(gb, 8) << 8;
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last[0] = last[1] = last[2] = -1;
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ctx.escapes[0] = escapes[0];
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ctx.escapes[1] = escapes[1];
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ctx.escapes[2] = escapes[2];
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ctx.v1 = &vlc[0];
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ctx.v2 = &vlc[1];
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ctx.recode1 = tmp1.values;
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ctx.recode2 = tmp2.values;
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ctx.last = last;
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huff.length = ((size + 3) >> 2) + 3;
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huff.maxlength = 0;
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huff.current = 0;
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huff.values = av_mallocz(huff.length * sizeof(int));
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smacker_decode_bigtree(gb, &huff, &ctx);
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skip_bits1(gb);
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if(ctx.last[0] == -1) ctx.last[0] = huff.current++;
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if(ctx.last[1] == -1) ctx.last[1] = huff.current++;
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if(ctx.last[2] == -1) ctx.last[2] = huff.current++;
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*recodes = huff.values;
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if(vlc[0].table)
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free_vlc(&vlc[0]);
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if(vlc[1].table)
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free_vlc(&vlc[1]);
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av_free(tmp1.bits);
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av_free(tmp1.lengths);
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av_free(tmp1.values);
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av_free(tmp2.bits);
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av_free(tmp2.lengths);
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av_free(tmp2.values);
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return 0;
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}
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static int decode_header_trees(SmackVContext *smk) {
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GetBitContext gb;
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int mmap_size, mclr_size, full_size, type_size;
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mmap_size = AV_RL32(smk->avctx->extradata);
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mclr_size = AV_RL32(smk->avctx->extradata + 4);
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full_size = AV_RL32(smk->avctx->extradata + 8);
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type_size = AV_RL32(smk->avctx->extradata + 12);
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init_get_bits(&gb, smk->avctx->extradata + 16, (smk->avctx->extradata_size - 16) * 8);
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if(!get_bits1(&gb)) {
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av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n");
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smk->mmap_tbl = av_malloc(sizeof(int) * 2);
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smk->mmap_tbl[0] = 0;
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smk->mmap_last[0] = smk->mmap_last[1] = smk->mmap_last[2] = 1;
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} else {
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smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size);
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}
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if(!get_bits1(&gb)) {
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av_log(smk->avctx, AV_LOG_INFO, "Skipping MCLR tree\n");
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smk->mclr_tbl = av_malloc(sizeof(int) * 2);
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smk->mclr_tbl[0] = 0;
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smk->mclr_last[0] = smk->mclr_last[1] = smk->mclr_last[2] = 1;
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} else {
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smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size);
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}
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if(!get_bits1(&gb)) {
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av_log(smk->avctx, AV_LOG_INFO, "Skipping FULL tree\n");
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smk->full_tbl = av_malloc(sizeof(int) * 2);
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smk->full_tbl[0] = 0;
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smk->full_last[0] = smk->full_last[1] = smk->full_last[2] = 1;
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} else {
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smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size);
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}
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if(!get_bits1(&gb)) {
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av_log(smk->avctx, AV_LOG_INFO, "Skipping TYPE tree\n");
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smk->type_tbl = av_malloc(sizeof(int) * 2);
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smk->type_tbl[0] = 0;
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smk->type_last[0] = smk->type_last[1] = smk->type_last[2] = 1;
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} else {
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smacker_decode_header_tree(smk, &gb, &smk->type_tbl, smk->type_last, type_size);
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}
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return 0;
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}
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static av_always_inline void last_reset(int *recode, int *last) {
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recode[last[0]] = recode[last[1]] = recode[last[2]] = 0;
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}
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/* get code and update history */
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static av_always_inline int smk_get_code(GetBitContext *gb, int *recode, int *last) {
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register int *table = recode;
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int v, b;
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b = get_bits_count(gb);
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while(*table & SMK_NODE) {
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if(get_bits1(gb))
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table += (*table) & (~SMK_NODE);
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table++;
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}
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v = *table;
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b = get_bits_count(gb) - b;
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if(v != recode[last[0]]) {
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recode[last[2]] = recode[last[1]];
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recode[last[1]] = recode[last[0]];
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recode[last[0]] = v;
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}
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return v;
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}
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static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
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{
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SmackVContext * const smk = avctx->priv_data;
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uint8_t *out;
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uint32_t *pal;
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GetBitContext gb;
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int blocks, blk, bw, bh;
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int i;
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int stride;
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if(buf_size == 769)
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return 0;
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if(smk->pic.data[0])
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avctx->release_buffer(avctx, &smk->pic);
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smk->pic.reference = 1;
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smk->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
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if(avctx->reget_buffer(avctx, &smk->pic) < 0){
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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}
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/* make the palette available on the way out */
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out = buf + 1;
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pal = (uint32_t*)smk->pic.data[1];
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smk->pic.palette_has_changed = buf[0] & 1;
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smk->pic.key_frame = !!(buf[0] & 2);
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if(smk->pic.key_frame)
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smk->pic.pict_type = FF_I_TYPE;
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else
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smk->pic.pict_type = FF_P_TYPE;
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for(i = 0; i < 256; i++) {
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int r, g, b;
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r = *out++;
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g = *out++;
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b = *out++;
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*pal++ = (r << 16) | (g << 8) | b;
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}
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last_reset(smk->mmap_tbl, smk->mmap_last);
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last_reset(smk->mclr_tbl, smk->mclr_last);
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last_reset(smk->full_tbl, smk->full_last);
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last_reset(smk->type_tbl, smk->type_last);
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init_get_bits(&gb, buf + 769, (buf_size - 769) * 8);
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blk = 0;
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bw = avctx->width >> 2;
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bh = avctx->height >> 2;
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blocks = bw * bh;
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out = smk->pic.data[0];
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stride = smk->pic.linesize[0];
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while(blk < blocks) {
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int type, run, mode;
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uint16_t pix;
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type = smk_get_code(&gb, smk->type_tbl, smk->type_last);
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run = block_runs[(type >> 2) & 0x3F];
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switch(type & 3){
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case SMK_BLK_MONO:
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while(run-- && blk < blocks){
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int clr, map;
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int hi, lo;
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clr = smk_get_code(&gb, smk->mclr_tbl, smk->mclr_last);
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map = smk_get_code(&gb, smk->mmap_tbl, smk->mmap_last);
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out = smk->pic.data[0] + (blk / bw) * (stride * 4) + (blk % bw) * 4;
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hi = clr >> 8;
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lo = clr & 0xFF;
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for(i = 0; i < 4; i++) {
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if(map & 1) out[0] = hi; else out[0] = lo;
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if(map & 2) out[1] = hi; else out[1] = lo;
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if(map & 4) out[2] = hi; else out[2] = lo;
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if(map & 8) out[3] = hi; else out[3] = lo;
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map >>= 4;
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out += stride;
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}
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blk++;
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}
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break;
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case SMK_BLK_FULL:
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mode = 0;
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if(avctx->codec_tag == MKTAG('S', 'M', 'K', '4')) { // In case of Smacker v4 we have three modes
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if(get_bits1(&gb)) mode = 1;
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else if(get_bits1(&gb)) mode = 2;
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}
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while(run-- && blk < blocks){
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out = smk->pic.data[0] + (blk / bw) * (stride * 4) + (blk % bw) * 4;
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switch(mode){
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case 0:
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for(i = 0; i < 4; i++) {
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pix = smk_get_code(&gb, smk->full_tbl, smk->full_last);
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AV_WL16(out+2,pix);
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pix = smk_get_code(&gb, smk->full_tbl, smk->full_last);
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AV_WL16(out,pix);
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out += stride;
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}
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break;
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case 1:
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pix = smk_get_code(&gb, smk->full_tbl, smk->full_last);
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out[0] = out[1] = pix & 0xFF;
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out[2] = out[3] = pix >> 8;
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out += stride;
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out[0] = out[1] = pix & 0xFF;
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out[2] = out[3] = pix >> 8;
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out += stride;
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pix = smk_get_code(&gb, smk->full_tbl, smk->full_last);
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out[0] = out[1] = pix & 0xFF;
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out[2] = out[3] = pix >> 8;
|
|
out += stride;
|
|
out[0] = out[1] = pix & 0xFF;
|
|
out[2] = out[3] = pix >> 8;
|
|
out += stride;
|
|
break;
|
|
case 2:
|
|
for(i = 0; i < 2; i++) {
|
|
uint16_t pix1, pix2;
|
|
pix1 = smk_get_code(&gb, smk->full_tbl, smk->full_last);
|
|
pix2 = smk_get_code(&gb, smk->full_tbl, smk->full_last);
|
|
AV_WL16(out,pix1);
|
|
AV_WL16(out+2,pix2);
|
|
out += stride;
|
|
AV_WL16(out,pix1);
|
|
AV_WL16(out+2,pix2);
|
|
out += stride;
|
|
}
|
|
break;
|
|
}
|
|
blk++;
|
|
}
|
|
break;
|
|
case SMK_BLK_SKIP:
|
|
while(run-- && blk < blocks)
|
|
blk++;
|
|
break;
|
|
case SMK_BLK_FILL:
|
|
mode = type >> 8;
|
|
while(run-- && blk < blocks){
|
|
uint32_t col;
|
|
out = smk->pic.data[0] + (blk / bw) * (stride * 4) + (blk % bw) * 4;
|
|
col = mode * 0x01010101;
|
|
for(i = 0; i < 4; i++) {
|
|
*((uint32_t*)out) = col;
|
|
out += stride;
|
|
}
|
|
blk++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = smk->pic;
|
|
|
|
/* always report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Init smacker decoder
|
|
*
|
|
*/
|
|
static int decode_init(AVCodecContext *avctx)
|
|
{
|
|
SmackVContext * const c = avctx->priv_data;
|
|
|
|
c->avctx = avctx;
|
|
|
|
c->pic.data[0] = NULL;
|
|
|
|
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
|
|
return 1;
|
|
}
|
|
|
|
avctx->pix_fmt = PIX_FMT_PAL8;
|
|
|
|
|
|
/* decode huffman trees from extradata */
|
|
if(avctx->extradata_size < 16){
|
|
av_log(avctx, AV_LOG_ERROR, "Extradata missing!\n");
|
|
return -1;
|
|
}
|
|
|
|
decode_header_trees(c);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Uninit smacker decoder
|
|
*
|
|
*/
|
|
static int decode_end(AVCodecContext *avctx)
|
|
{
|
|
SmackVContext * const smk = avctx->priv_data;
|
|
|
|
av_freep(&smk->mmap_tbl);
|
|
av_freep(&smk->mclr_tbl);
|
|
av_freep(&smk->full_tbl);
|
|
av_freep(&smk->type_tbl);
|
|
|
|
if (smk->pic.data[0])
|
|
avctx->release_buffer(avctx, &smk->pic);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int smka_decode_init(AVCodecContext *avctx)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Decode Smacker audio data
|
|
*/
|
|
static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
|
|
{
|
|
GetBitContext gb;
|
|
HuffContext h[4];
|
|
VLC vlc[4];
|
|
int16_t *samples = data;
|
|
int val;
|
|
int i, res;
|
|
int unp_size;
|
|
int bits, stereo;
|
|
int pred[2] = {0, 0};
|
|
|
|
unp_size = AV_RL32(buf);
|
|
|
|
init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);
|
|
|
|
if(!get_bits1(&gb)){
|
|
av_log(avctx, AV_LOG_INFO, "Sound: no data\n");
|
|
*data_size = 0;
|
|
return 1;
|
|
}
|
|
stereo = get_bits1(&gb);
|
|
bits = get_bits1(&gb);
|
|
if (unp_size & 0xC0000000 || (unp_size << !bits) > *data_size) {
|
|
av_log(avctx, AV_LOG_ERROR, "Frame is too large to fit in buffer\n");
|
|
return -1;
|
|
}
|
|
|
|
memset(vlc, 0, sizeof(VLC) * 4);
|
|
memset(h, 0, sizeof(HuffContext) * 4);
|
|
// Initialize
|
|
for(i = 0; i < (1 << (bits + stereo)); i++) {
|
|
h[i].length = 256;
|
|
h[i].maxlength = 0;
|
|
h[i].current = 0;
|
|
h[i].bits = av_mallocz(256 * 4);
|
|
h[i].lengths = av_mallocz(256 * sizeof(int));
|
|
h[i].values = av_mallocz(256 * sizeof(int));
|
|
skip_bits1(&gb);
|
|
smacker_decode_tree(&gb, &h[i], 0, 0);
|
|
skip_bits1(&gb);
|
|
if(h[i].current > 1) {
|
|
res = init_vlc(&vlc[i], SMKTREE_BITS, h[i].length,
|
|
h[i].lengths, sizeof(int), sizeof(int),
|
|
h[i].bits, sizeof(uint32_t), sizeof(uint32_t), INIT_VLC_LE);
|
|
if(res < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
if(bits) { //decode 16-bit data
|
|
for(i = stereo; i >= 0; i--)
|
|
pred[i] = bswap_16(get_bits(&gb, 16));
|
|
for(i = 0; i < stereo; i++)
|
|
*samples++ = pred[i];
|
|
for(i = 0; i < unp_size / 2; i++) {
|
|
if(i & stereo) {
|
|
if(vlc[2].table)
|
|
res = get_vlc2(&gb, vlc[2].table, SMKTREE_BITS, 3);
|
|
else
|
|
res = 0;
|
|
val = h[2].values[res];
|
|
if(vlc[3].table)
|
|
res = get_vlc2(&gb, vlc[3].table, SMKTREE_BITS, 3);
|
|
else
|
|
res = 0;
|
|
val |= h[3].values[res] << 8;
|
|
pred[1] += (int16_t)val;
|
|
*samples++ = pred[1];
|
|
} else {
|
|
if(vlc[0].table)
|
|
res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
|
|
else
|
|
res = 0;
|
|
val = h[0].values[res];
|
|
if(vlc[1].table)
|
|
res = get_vlc2(&gb, vlc[1].table, SMKTREE_BITS, 3);
|
|
else
|
|
res = 0;
|
|
val |= h[1].values[res] << 8;
|
|
pred[0] += val;
|
|
*samples++ = pred[0];
|
|
}
|
|
}
|
|
} else { //8-bit data
|
|
for(i = stereo; i >= 0; i--)
|
|
pred[i] = get_bits(&gb, 8);
|
|
for(i = 0; i < stereo; i++)
|
|
*samples++ = (pred[i] - 0x80) << 8;
|
|
for(i = 0; i < unp_size; i++) {
|
|
if(i & stereo){
|
|
if(vlc[1].table)
|
|
res = get_vlc2(&gb, vlc[1].table, SMKTREE_BITS, 3);
|
|
else
|
|
res = 0;
|
|
pred[1] += (int8_t)h[1].values[res];
|
|
*samples++ = (pred[1] - 0x80) << 8;
|
|
} else {
|
|
if(vlc[0].table)
|
|
res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
|
|
else
|
|
res = 0;
|
|
pred[0] += (int8_t)h[0].values[res];
|
|
*samples++ = (pred[0] - 0x80) << 8;
|
|
}
|
|
}
|
|
unp_size *= 2;
|
|
}
|
|
|
|
for(i = 0; i < 4; i++) {
|
|
if(vlc[i].table)
|
|
free_vlc(&vlc[i]);
|
|
if(h[i].bits)
|
|
av_free(h[i].bits);
|
|
if(h[i].lengths)
|
|
av_free(h[i].lengths);
|
|
if(h[i].values)
|
|
av_free(h[i].values);
|
|
}
|
|
|
|
*data_size = unp_size;
|
|
return buf_size;
|
|
}
|
|
|
|
AVCodec smacker_decoder = {
|
|
"smackvid",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_SMACKVIDEO,
|
|
sizeof(SmackVContext),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame
|
|
};
|
|
|
|
AVCodec smackaud_decoder = {
|
|
"smackaud",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_SMACKAUDIO,
|
|
0,
|
|
smka_decode_init,
|
|
NULL,
|
|
NULL,
|
|
smka_decode_frame
|
|
};
|
|
|