diff options
Diffstat (limited to 'ffmpeg1/libavcodec/smacker.c')
| -rw-r--r-- | ffmpeg1/libavcodec/smacker.c | 782 |
1 files changed, 782 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/smacker.c b/ffmpeg1/libavcodec/smacker.c new file mode 100644 index 0000000..c070150 --- /dev/null +++ b/ffmpeg1/libavcodec/smacker.c @@ -0,0 +1,782 @@ +/* + * Smacker decoder + * Copyright (c) 2006 Konstantin Shishkov + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * 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 along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Smacker decoder + */ + +/* + * Based on http://wiki.multimedia.cx/index.php?title=Smacker + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "libavutil/channel_layout.h" +#include "avcodec.h" +#include "internal.h" +#include "mathops.h" + +#define BITSTREAM_READER_LE +#include "get_bits.h" +#include "bytestream.h" + +#define SMKTREE_BITS 9 +#define SMK_NODE 0x80000000 + +/* + * Decoder context + */ +typedef struct SmackVContext { + AVCodecContext *avctx; + AVFrame pic; + + int *mmap_tbl, *mclr_tbl, *full_tbl, *type_tbl; + int mmap_last[3], mclr_last[3], full_last[3], type_last[3]; +} SmackVContext; + +/** + * Context used for code reconstructing + */ +typedef struct HuffContext { + int length; + int maxlength; + int current; + uint32_t *bits; + int *lengths; + int *values; +} HuffContext; + +/* common parameters used for decode_bigtree */ +typedef struct DBCtx { + VLC *v1, *v2; + int *recode1, *recode2; + int escapes[3]; + int *last; + int lcur; +} DBCtx; + +/* possible runs of blocks */ +static const int block_runs[64] = { + 1, 2, 3, 4, 5, 6, 7, 8, + 9, 10, 11, 12, 13, 14, 15, 16, + 17, 18, 19, 20, 21, 22, 23, 24, + 25, 26, 27, 28, 29, 30, 31, 32, + 33, 34, 35, 36, 37, 38, 39, 40, + 41, 42, 43, 44, 45, 46, 47, 48, + 49, 50, 51, 52, 53, 54, 55, 56, + 57, 58, 59, 128, 256, 512, 1024, 2048 }; + +enum SmkBlockTypes { + SMK_BLK_MONO = 0, + SMK_BLK_FULL = 1, + SMK_BLK_SKIP = 2, + SMK_BLK_FILL = 3 }; + +/** + * Decode local frame tree + */ +static int smacker_decode_tree(GetBitContext *gb, HuffContext *hc, uint32_t prefix, int length) +{ + if(length > 32 || length > 3*SMKTREE_BITS) { + av_log(NULL, AV_LOG_ERROR, "length too long\n"); + return AVERROR_INVALIDDATA; + } + if(!get_bits1(gb)){ //Leaf + if(hc->current >= 256){ + av_log(NULL, AV_LOG_ERROR, "Tree size exceeded!\n"); + return AVERROR_INVALIDDATA; + } + if(length){ + hc->bits[hc->current] = prefix; + hc->lengths[hc->current] = length; + } else { + hc->bits[hc->current] = 0; + hc->lengths[hc->current] = 0; + } + hc->values[hc->current] = get_bits(gb, 8); + hc->current++; + if(hc->maxlength < length) + hc->maxlength = length; + return 0; + } else { //Node + int r; + length++; + r = smacker_decode_tree(gb, hc, prefix, length); + if(r) + return r; + return smacker_decode_tree(gb, hc, prefix | (1 << (length - 1)), length); + } +} + +/** + * Decode header tree + */ +static int smacker_decode_bigtree(GetBitContext *gb, HuffContext *hc, DBCtx *ctx) +{ + if (hc->current + 1 >= hc->length) { + av_log(NULL, AV_LOG_ERROR, "Tree size exceeded!\n"); + return AVERROR_INVALIDDATA; + } + if(!get_bits1(gb)){ //Leaf + int val, i1, i2; + i1 = ctx->v1->table ? get_vlc2(gb, ctx->v1->table, SMKTREE_BITS, 3) : 0; + i2 = ctx->v2->table ? get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3) : 0; + if (i1 < 0 || i2 < 0) + return AVERROR_INVALIDDATA; + val = ctx->recode1[i1] | (ctx->recode2[i2] << 8); + if(val == ctx->escapes[0]) { + ctx->last[0] = hc->current; + val = 0; + } else if(val == ctx->escapes[1]) { + ctx->last[1] = hc->current; + val = 0; + } else if(val == ctx->escapes[2]) { + ctx->last[2] = hc->current; + val = 0; + } + + hc->values[hc->current++] = val; + return 1; + } else { //Node + int r = 0, r_new, t; + + t = hc->current++; + r = smacker_decode_bigtree(gb, hc, ctx); + if(r < 0) + return r; + hc->values[t] = SMK_NODE | r; + r++; + r_new = smacker_decode_bigtree(gb, hc, ctx); + if (r_new < 0) + return r_new; + return r + r_new; + } +} + +/** + * Store large tree as FFmpeg's vlc codes + */ +static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int **recodes, int *last, int size) +{ + int res; + HuffContext huff; + HuffContext tmp1, tmp2; + VLC vlc[2] = { { 0 } }; + int escapes[3]; + DBCtx ctx; + int err = 0; + + if(size >= UINT_MAX>>4){ // (((size + 3) >> 2) + 3) << 2 must not overflow + av_log(smk->avctx, AV_LOG_ERROR, "size too large\n"); + return AVERROR_INVALIDDATA; + } + + tmp1.length = 256; + tmp1.maxlength = 0; + tmp1.current = 0; + tmp1.bits = av_mallocz(256 * 4); + tmp1.lengths = av_mallocz(256 * sizeof(int)); + tmp1.values = av_mallocz(256 * sizeof(int)); + + tmp2.length = 256; + tmp2.maxlength = 0; + tmp2.current = 0; + tmp2.bits = av_mallocz(256 * 4); + tmp2.lengths = av_mallocz(256 * sizeof(int)); + tmp2.values = av_mallocz(256 * sizeof(int)); + + if(get_bits1(gb)) { + res = smacker_decode_tree(gb, &tmp1, 0, 0); + if (res < 0) + return res; + skip_bits1(gb); + if(tmp1.current > 1) { + res = init_vlc(&vlc[0], SMKTREE_BITS, tmp1.length, + tmp1.lengths, sizeof(int), sizeof(int), + tmp1.bits, sizeof(uint32_t), sizeof(uint32_t), INIT_VLC_LE); + if(res < 0) { + av_log(smk->avctx, AV_LOG_ERROR, "Cannot build VLC table\n"); + return AVERROR_INVALIDDATA; + } + } + } + if (!vlc[0].table) { + av_log(smk->avctx, AV_LOG_ERROR, "Skipping low bytes tree\n"); + } + if(get_bits1(gb)){ + res = smacker_decode_tree(gb, &tmp2, 0, 0); + if (res < 0) + return res; + skip_bits1(gb); + if(tmp2.current > 1) { + res = init_vlc(&vlc[1], SMKTREE_BITS, tmp2.length, + tmp2.lengths, sizeof(int), sizeof(int), + tmp2.bits, sizeof(uint32_t), sizeof(uint32_t), INIT_VLC_LE); + if(res < 0) { + av_log(smk->avctx, AV_LOG_ERROR, "Cannot build VLC table\n"); + return AVERROR_INVALIDDATA; + } + } + } + if (!vlc[1].table) { + av_log(smk->avctx, AV_LOG_ERROR, "Skipping high bytes tree\n"); + } + + escapes[0] = get_bits(gb, 16); + escapes[1] = get_bits(gb, 16); + escapes[2] = get_bits(gb, 16); + + last[0] = last[1] = last[2] = -1; + + ctx.escapes[0] = escapes[0]; + ctx.escapes[1] = escapes[1]; + ctx.escapes[2] = escapes[2]; + ctx.v1 = &vlc[0]; + ctx.v2 = &vlc[1]; + ctx.recode1 = tmp1.values; + ctx.recode2 = tmp2.values; + ctx.last = last; + + huff.length = ((size + 3) >> 2) + 3; + huff.maxlength = 0; + huff.current = 0; + huff.values = av_mallocz(huff.length * sizeof(int)); + + if (smacker_decode_bigtree(gb, &huff, &ctx) < 0) + err = -1; + skip_bits1(gb); + if(ctx.last[0] == -1) ctx.last[0] = huff.current++; + if(ctx.last[1] == -1) ctx.last[1] = huff.current++; + if(ctx.last[2] == -1) ctx.last[2] = huff.current++; + if(huff.current > huff.length){ + ctx.last[0] = ctx.last[1] = ctx.last[2] = 1; + av_log(smk->avctx, AV_LOG_ERROR, "bigtree damaged\n"); + return AVERROR_INVALIDDATA; + } + + *recodes = huff.values; + + if(vlc[0].table) + ff_free_vlc(&vlc[0]); + if(vlc[1].table) + ff_free_vlc(&vlc[1]); + av_free(tmp1.bits); + av_free(tmp1.lengths); + av_free(tmp1.values); + av_free(tmp2.bits); + av_free(tmp2.lengths); + av_free(tmp2.values); + + return err; +} + +static int decode_header_trees(SmackVContext *smk) { + GetBitContext gb; + int mmap_size, mclr_size, full_size, type_size; + + mmap_size = AV_RL32(smk->avctx->extradata); + mclr_size = AV_RL32(smk->avctx->extradata + 4); + full_size = AV_RL32(smk->avctx->extradata + 8); + type_size = AV_RL32(smk->avctx->extradata + 12); + + init_get_bits(&gb, smk->avctx->extradata + 16, (smk->avctx->extradata_size - 16) * 8); + + if(!get_bits1(&gb)) { + av_log(smk->avctx, AV_LOG_INFO, "Skipping MMAP tree\n"); + smk->mmap_tbl = av_malloc(sizeof(int) * 2); + smk->mmap_tbl[0] = 0; + smk->mmap_last[0] = smk->mmap_last[1] = smk->mmap_last[2] = 1; + } else { + if (smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size)) + return AVERROR_INVALIDDATA; + } + if(!get_bits1(&gb)) { + av_log(smk->avctx, AV_LOG_INFO, "Skipping MCLR tree\n"); + smk->mclr_tbl = av_malloc(sizeof(int) * 2); + smk->mclr_tbl[0] = 0; + smk->mclr_last[0] = smk->mclr_last[1] = smk->mclr_last[2] = 1; + } else { + if (smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size)) + return AVERROR_INVALIDDATA; + } + if(!get_bits1(&gb)) { + av_log(smk->avctx, AV_LOG_INFO, "Skipping FULL tree\n"); + smk->full_tbl = av_malloc(sizeof(int) * 2); + smk->full_tbl[0] = 0; + smk->full_last[0] = smk->full_last[1] = smk->full_last[2] = 1; + } else { + if (smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size)) + return AVERROR_INVALIDDATA; + } + if(!get_bits1(&gb)) { + av_log(smk->avctx, AV_LOG_INFO, "Skipping TYPE tree\n"); + smk->type_tbl = av_malloc(sizeof(int) * 2); + smk->type_tbl[0] = 0; + smk->type_last[0] = smk->type_last[1] = smk->type_last[2] = 1; + } else { + if (smacker_decode_header_tree(smk, &gb, &smk->type_tbl, smk->type_last, type_size)) + return AVERROR_INVALIDDATA; + } + + return 0; +} + +static av_always_inline void last_reset(int *recode, int *last) { + recode[last[0]] = recode[last[1]] = recode[last[2]] = 0; +} + +/* get code and update history */ +static av_always_inline int smk_get_code(GetBitContext *gb, int *recode, int *last) { + register int *table = recode; + int v; + + while(*table & SMK_NODE) { + if(get_bits1(gb)) + table += (*table) & (~SMK_NODE); + table++; + } + v = *table; + + if(v != recode[last[0]]) { + recode[last[2]] = recode[last[1]]; + recode[last[1]] = recode[last[0]]; + recode[last[0]] = v; + } + return v; +} + +static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) +{ + SmackVContext * const smk = avctx->priv_data; + uint8_t *out; + uint32_t *pal; + GetByteContext gb2; + GetBitContext gb; + int blocks, blk, bw, bh; + int i, ret; + int stride; + int flags; + + if (avpkt->size <= 769) + return AVERROR_INVALIDDATA; + + if ((ret = ff_reget_buffer(avctx, &smk->pic)) < 0) + return ret; + + /* make the palette available on the way out */ + pal = (uint32_t*)smk->pic.data[1]; + bytestream2_init(&gb2, avpkt->data, avpkt->size); + flags = bytestream2_get_byteu(&gb2); + smk->pic.palette_has_changed = flags & 1; + smk->pic.key_frame = !!(flags & 2); + if(smk->pic.key_frame) + smk->pic.pict_type = AV_PICTURE_TYPE_I; + else + smk->pic.pict_type = AV_PICTURE_TYPE_P; + + for(i = 0; i < 256; i++) + *pal++ = 0xFFU << 24 | bytestream2_get_be24u(&gb2); + + last_reset(smk->mmap_tbl, smk->mmap_last); + last_reset(smk->mclr_tbl, smk->mclr_last); + last_reset(smk->full_tbl, smk->full_last); + last_reset(smk->type_tbl, smk->type_last); + init_get_bits(&gb, avpkt->data + 769, (avpkt->size - 769) * 8); + + blk = 0; + bw = avctx->width >> 2; + bh = avctx->height >> 2; + blocks = bw * bh; + out = smk->pic.data[0]; + stride = smk->pic.linesize[0]; + while(blk < blocks) { + int type, run, mode; + uint16_t pix; + + type = smk_get_code(&gb, smk->type_tbl, smk->type_last); + run = block_runs[(type >> 2) & 0x3F]; + switch(type & 3){ + case SMK_BLK_MONO: + while(run-- && blk < blocks){ + int clr, map; + int hi, lo; + clr = smk_get_code(&gb, smk->mclr_tbl, smk->mclr_last); + map = smk_get_code(&gb, smk->mmap_tbl, smk->mmap_last); + out = smk->pic.data[0] + (blk / bw) * (stride * 4) + (blk % bw) * 4; + hi = clr >> 8; + lo = clr & 0xFF; + for(i = 0; i < 4; i++) { + if(map & 1) out[0] = hi; else out[0] = lo; + if(map & 2) out[1] = hi; else out[1] = lo; + if(map & 4) out[2] = hi; else out[2] = lo; + if(map & 8) out[3] = hi; else out[3] = lo; + map >>= 4; + out += stride; + } + blk++; + } + break; + case SMK_BLK_FULL: + mode = 0; + if(avctx->codec_tag == MKTAG('S', 'M', 'K', '4')) { // In case of Smacker v4 we have three modes + if(get_bits1(&gb)) mode = 1; + else if(get_bits1(&gb)) mode = 2; + } + while(run-- && blk < blocks){ + out = smk->pic.data[0] + (blk / bw) * (stride * 4) + (blk % bw) * 4; + switch(mode){ + case 0: + for(i = 0; i < 4; i++) { + pix = smk_get_code(&gb, smk->full_tbl, smk->full_last); + AV_WL16(out+2,pix); + pix = smk_get_code(&gb, smk->full_tbl, smk->full_last); + AV_WL16(out,pix); + out += stride; + } + break; + case 1: + pix = smk_get_code(&gb, smk->full_tbl, smk->full_last); + out[0] = out[1] = pix & 0xFF; + out[2] = out[3] = pix >> 8; + out += stride; + out[0] = out[1] = pix & 0xFF; + out[2] = out[3] = pix >> 8; + out += stride; + pix = smk_get_code(&gb, smk->full_tbl, smk->full_last); + out[0] = out[1] = pix & 0xFF; + 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; + pix2 = smk_get_code(&gb, smk->full_tbl, smk->full_last); + pix1 = 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; + } + + } + + if ((ret = av_frame_ref(data, &smk->pic)) < 0) + return ret; + + *got_frame = 1; + + /* always report that the buffer was completely consumed */ + return avpkt->size; +} + + + +/* + * + * Init smacker decoder + * + */ +static av_cold int decode_init(AVCodecContext *avctx) +{ + SmackVContext * const c = avctx->priv_data; + + c->avctx = avctx; + + avctx->pix_fmt = AV_PIX_FMT_PAL8; + avcodec_get_frame_defaults(&c->pic); + + /* decode huffman trees from extradata */ + if(avctx->extradata_size < 16){ + av_log(avctx, AV_LOG_ERROR, "Extradata missing!\n"); + return AVERROR(EINVAL); + } + + if (decode_header_trees(c)) + return AVERROR_INVALIDDATA; + + return 0; +} + + + +/* + * + * Uninit smacker decoder + * + */ +static av_cold 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); + + av_frame_unref(&smk->pic); + + return 0; +} + + +static av_cold int smka_decode_init(AVCodecContext *avctx) +{ + if (avctx->channels < 1 || avctx->channels > 2) { + av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n"); + return AVERROR(EINVAL); + } + avctx->channel_layout = (avctx->channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO; + avctx->sample_fmt = avctx->bits_per_coded_sample == 8 ? AV_SAMPLE_FMT_U8 : AV_SAMPLE_FMT_S16; + + return 0; +} + +/** + * Decode Smacker audio data + */ +static int smka_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) +{ + AVFrame *frame = data; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + GetBitContext gb; + HuffContext h[4] = { { 0 } }; + VLC vlc[4] = { { 0 } }; + int16_t *samples; + uint8_t *samples8; + int val; + int i, res, ret; + int unp_size; + int bits, stereo; + int pred[2] = {0, 0}; + + if (buf_size <= 4) { + av_log(avctx, AV_LOG_ERROR, "packet is too small\n"); + return AVERROR(EINVAL); + } + + unp_size = AV_RL32(buf); + + if (unp_size > (1U<<24)) { + av_log(avctx, AV_LOG_ERROR, "packet is too big\n"); + return AVERROR_INVALIDDATA; + } + + init_get_bits(&gb, buf + 4, (buf_size - 4) * 8); + + if(!get_bits1(&gb)){ + av_log(avctx, AV_LOG_INFO, "Sound: no data\n"); + *got_frame_ptr = 0; + return 1; + } + stereo = get_bits1(&gb); + bits = get_bits1(&gb); + if (stereo ^ (avctx->channels != 1)) { + av_log(avctx, AV_LOG_ERROR, "channels mismatch\n"); + return AVERROR(EINVAL); + } + if (bits && avctx->sample_fmt == AV_SAMPLE_FMT_U8) { + av_log(avctx, AV_LOG_ERROR, "sample format mismatch\n"); + return AVERROR(EINVAL); + } + + /* get output buffer */ + frame->nb_samples = unp_size / (avctx->channels * (bits + 1)); + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) + return ret; + samples = (int16_t *)frame->data[0]; + samples8 = frame->data[0]; + + // 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); + res = smacker_decode_tree(&gb, &h[i], 0, 0); + if (res < 0) + return res; + 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 AVERROR_INVALIDDATA; + } + } + } + if(bits) { //decode 16-bit data + for(i = stereo; i >= 0; i--) + pred[i] = sign_extend(av_bswap16(get_bits(&gb, 16)), 16); + for(i = 0; i <= stereo; i++) + *samples++ = pred[i]; + for(; i < unp_size / 2; i++) { + if(get_bits_left(&gb)<0) + return AVERROR_INVALIDDATA; + if(i & stereo) { + if(vlc[2].table) + res = get_vlc2(&gb, vlc[2].table, SMKTREE_BITS, 3); + else + res = 0; + if (res < 0) { + av_log(avctx, AV_LOG_ERROR, "invalid vlc\n"); + return AVERROR_INVALIDDATA; + } + val = h[2].values[res]; + if(vlc[3].table) + res = get_vlc2(&gb, vlc[3].table, SMKTREE_BITS, 3); + else + res = 0; + if (res < 0) { + av_log(avctx, AV_LOG_ERROR, "invalid vlc\n"); + return AVERROR_INVALIDDATA; + } + val |= h[3].values[res] << 8; + pred[1] += sign_extend(val, 16); + *samples++ = av_clip_int16(pred[1]); + } else { + if(vlc[0].table) + res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3); + else + res = 0; + if (res < 0) { + av_log(avctx, AV_LOG_ERROR, "invalid vlc\n"); + return AVERROR_INVALIDDATA; + } + val = h[0].values[res]; + if(vlc[1].table) + res = get_vlc2(&gb, vlc[1].table, SMKTREE_BITS, 3); + else + res = 0; + if (res < 0) { + av_log(avctx, AV_LOG_ERROR, "invalid vlc\n"); + return AVERROR_INVALIDDATA; + } + val |= h[1].values[res] << 8; + pred[0] += sign_extend(val, 16); + *samples++ = av_clip_int16(pred[0]); + } + } + } else { //8-bit data + for(i = stereo; i >= 0; i--) + pred[i] = get_bits(&gb, 8); + for(i = 0; i <= stereo; i++) + *samples8++ = pred[i]; + for(; i < unp_size; i++) { + if(get_bits_left(&gb)<0) + return AVERROR_INVALIDDATA; + if(i & stereo){ + if(vlc[1].table) + res = get_vlc2(&gb, vlc[1].table, SMKTREE_BITS, 3); + else + res = 0; + if (res < 0) { + av_log(avctx, AV_LOG_ERROR, "invalid vlc\n"); + return AVERROR_INVALIDDATA; + } + pred[1] += sign_extend(h[1].values[res], 8); + *samples8++ = av_clip_uint8(pred[1]); + } else { + if(vlc[0].table) + res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3); + else + res = 0; + if (res < 0) { + av_log(avctx, AV_LOG_ERROR, "invalid vlc\n"); + return AVERROR_INVALIDDATA; + } + pred[0] += sign_extend(h[0].values[res], 8); + *samples8++ = av_clip_uint8(pred[0]); + } + } + } + + for(i = 0; i < 4; i++) { + if(vlc[i].table) + ff_free_vlc(&vlc[i]); + av_free(h[i].bits); + av_free(h[i].lengths); + av_free(h[i].values); + } + + *got_frame_ptr = 1; + + return buf_size; +} + +AVCodec ff_smacker_decoder = { + .name = "smackvid", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_SMACKVIDEO, + .priv_data_size = sizeof(SmackVContext), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Smacker video"), +}; + +AVCodec ff_smackaud_decoder = { + .name = "smackaud", + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_SMACKAUDIO, + .init = smka_decode_init, + .decode = smka_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Smacker audio"), +}; |