* Smacker decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
+ * 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.c
+ * @file libavcodec/smacker.c
* Smacker decoder
*/
#include <stdio.h>
#include <stdlib.h>
-#include "common.h"
#include "avcodec.h"
#define ALT_BITSTREAM_READER_LE
-#include "bitstream.h"
+#include "get_bits.h"
+#include "bytestream.h"
#define SMKTREE_BITS 9
#define SMK_NODE 0x80000000
if(get_bits1(gb)) {
smacker_decode_tree(gb, &tmp1, 0, 0);
- get_bits1(gb);
+ skip_bits1(gb);
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(get_bits1(gb)){
smacker_decode_tree(gb, &tmp2, 0, 0);
- get_bits1(gb);
+ skip_bits1(gb);
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);
huff.values = av_mallocz(huff.length * sizeof(int));
smacker_decode_bigtree(gb, &huff, &ctx);
- get_bits1(gb);
+ 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++;
GetBitContext gb;
int mmap_size, mclr_size, full_size, type_size;
- mmap_size = LE_32(smk->avctx->extradata);
- mclr_size = LE_32(smk->avctx->extradata + 4);
- full_size = LE_32(smk->avctx->extradata + 8);
- type_size = LE_32(smk->avctx->extradata + 12);
+ 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);
} else {
smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size);
}
- if(!get_bits(&gb, 1)) {
+ 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;
} else {
smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size);
}
- if(!get_bits(&gb, 1)) {
+ 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;
} else {
smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size);
}
- if(!get_bits(&gb, 1)) {
+ 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;
return 0;
}
-static always_inline void last_reset(int *recode, int *last) {
+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 always_inline int smk_get_code(GetBitContext *gb, int *recode, int *last) {
+static av_always_inline int smk_get_code(GetBitContext *gb, int *recode, int *last) {
register int *table = recode;
int v, b;
return v;
}
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
- SmackVContext * const smk = (SmackVContext *)avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ SmackVContext * const smk = avctx->priv_data;
uint8_t *out;
uint32_t *pal;
GetBitContext gb;
int i;
int stride;
- if(buf_size == 769)
+ if(buf_size <= 769)
return 0;
if(smk->pic.data[0])
avctx->release_buffer(avctx, &smk->pic);
}
/* make the palette available on the way out */
- out = buf + 1;
pal = (uint32_t*)smk->pic.data[1];
smk->pic.palette_has_changed = buf[0] & 1;
smk->pic.key_frame = !!(buf[0] & 2);
else
smk->pic.pict_type = FF_P_TYPE;
- for(i = 0; i < 256; i++) {
- int r, g, b;
- r = *out++;
- g = *out++;
- b = *out++;
- *pal++ = (r << 16) | (g << 8) | b;
- }
+ buf++;
+ for(i = 0; i < 256; i++)
+ *pal++ = bytestream_get_be24(&buf);
+ buf_size -= 769;
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, buf + 769, (buf_size - 769) * 8);
+ init_get_bits(&gb, buf, buf_size * 8);
blk = 0;
bw = avctx->width >> 2;
case 0:
for(i = 0; i < 4; i++) {
pix = smk_get_code(&gb, smk->full_tbl, smk->full_last);
- out[2] = pix & 0xFF;
- out[3] = pix >> 8;
+ AV_WL16(out+2,pix);
pix = smk_get_code(&gb, smk->full_tbl, smk->full_last);
- out[0] = pix & 0xFF;
- out[1] = pix >> 8;
+ AV_WL16(out,pix);
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);
- out[0] = pix1 & 0xFF; out[1] = pix1 >> 8;
- out[2] = pix2 & 0xFF; out[3] = pix2 >> 8;
+ pix1 = smk_get_code(&gb, smk->full_tbl, smk->full_last);
+ AV_WL16(out,pix1);
+ AV_WL16(out+2,pix2);
out += stride;
- out[0] = pix1 & 0xFF; out[1] = pix1 >> 8;
- out[2] = pix2 & 0xFF; out[3] = pix2 >> 8;
+ AV_WL16(out,pix1);
+ AV_WL16(out+2,pix2);
out += stride;
}
break;
* Init smacker decoder
*
*/
-static int decode_init(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
{
- SmackVContext * const c = (SmackVContext *)avctx->priv_data;
+ SmackVContext * const c = avctx->priv_data;
c->avctx = avctx;
- avctx->has_b_frames = 0;
-
- c->pic.data[0] = NULL;
- if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
+ if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
return 1;
}
* Uninit smacker decoder
*
*/
-static int decode_end(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
{
- SmackVContext * const smk = (SmackVContext *)avctx->priv_data;
+ SmackVContext * const smk = avctx->priv_data;
- if(smk->mmap_tbl)
- av_free(smk->mmap_tbl);
- if(smk->mclr_tbl)
- av_free(smk->mclr_tbl);
- if(smk->full_tbl)
- av_free(smk->full_tbl);
- if(smk->type_tbl)
- av_free(smk->type_tbl);
+ 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);
}
-static int smka_decode_init(AVCodecContext *avctx)
+static av_cold int smka_decode_init(AVCodecContext *avctx)
{
+ avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
return 0;
}
/**
* Decode Smacker audio data
*/
-static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
+static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
GetBitContext gb;
HuffContext h[4];
VLC vlc[4];
int16_t *samples = data;
+ int8_t *samples8 = data;
int val;
int i, res;
int unp_size;
int bits, stereo;
int pred[2] = {0, 0};
- unp_size = LE_32(buf);
+ unp_size = AV_RL32(buf);
init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);
}
stereo = get_bits1(&gb);
bits = get_bits1(&gb);
+ if (unp_size & 0xC0000000 || unp_size > *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);
h[i].bits = av_mallocz(256 * 4);
h[i].lengths = av_mallocz(256 * sizeof(int));
h[i].values = av_mallocz(256 * sizeof(int));
- get_bits1(&gb);
+ skip_bits1(&gb);
smacker_decode_tree(&gb, &h[i], 0, 0);
- get_bits1(&gb);
+ 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),
}
}
if(bits) { //decode 16-bit data
- pred[0] = get_bits(&gb, 8);
- pred[0] |= get_bits(&gb, 8);
- *samples++ = pred[0];
- if(stereo) {
- pred[1] = get_bits(&gb, 8);
- pred[1] |= get_bits(&gb, 8);
- *samples++ = pred[1];
- }
+ 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)
}
}
} else { //8-bit data
- pred[0] = get_bits(&gb, 8);
- *samples++ = (pred[0] - 0x80) << 8;
- if(stereo) {
- pred[1] = get_bits(&gb, 8);
- *samples++ = (pred[1] - 0x80) << 8;
- }
+ for(i = stereo; i >= 0; i--)
+ pred[i] = get_bits(&gb, 8);
+ for(i = 0; i < stereo; i++)
+ *samples8++ = pred[i];
for(i = 0; i < unp_size; i++) {
if(i & stereo){
if(vlc[1].table)
else
res = 0;
pred[1] += (int8_t)h[1].values[res];
- *samples++ = (pred[1] - 0x80) << 8;
+ *samples8++ = pred[1];
} 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;
+ *samples8++ = pred[0];
}
}
- unp_size *= 2;
}
for(i = 0; i < 4; i++) {
decode_init,
NULL,
decode_end,
- decode_frame
+ decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("Smacker video"),
};
AVCodec smackaud_decoder = {
smka_decode_init,
NULL,
NULL,
- smka_decode_frame
+ smka_decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("Smacker audio"),
};
projects / frescor / ffmpeg.git / blobdiff