* Smacker decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include "avcodec.h"
-#include "libavcore/audioconvert.h"
+#include "libavutil/audioconvert.h"
+#include "mathops.h"
-#define ALT_BITSTREAM_READER_LE
+#define BITSTREAM_READER_LE
#include "get_bits.h"
#include "bytestream.h"
return -1;
}
b1 = get_bits_count(gb);
- i1 = get_vlc2(gb, ctx->v1->table, SMKTREE_BITS, 3);
+ i1 = ctx->v1->table ? get_vlc2(gb, ctx->v1->table, SMKTREE_BITS, 3) : 0;
b1 = get_bits_count(gb) - b1;
b2 = get_bits_count(gb);
- i2 = get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3);
+ i2 = ctx->v2->table ? get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3) : 0;
b2 = get_bits_count(gb) - b2;
+ if (i1 < 0 || i2 < 0)
+ return -1;
val = ctx->recode1[i1] | (ctx->recode2[i2] << 8);
if(val == ctx->escapes[0]) {
ctx->last[0] = hc->current;
}
/**
- * Store large tree as FFmpeg's vlc codes
+ * Store large tree as Libav's vlc codes
*/
static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int **recodes, int *last, int size)
{
smk->mmap_tbl[0] = 0;
smk->mmap_last[0] = smk->mmap_last[1] = smk->mmap_last[2] = 1;
} else {
- smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size);
+ if (smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size))
+ return -1;
}
if(!get_bits1(&gb)) {
av_log(smk->avctx, AV_LOG_INFO, "Skipping MCLR tree\n");
smk->mclr_tbl[0] = 0;
smk->mclr_last[0] = smk->mclr_last[1] = smk->mclr_last[2] = 1;
} else {
- smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size);
+ if (smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size))
+ return -1;
}
if(!get_bits1(&gb)) {
av_log(smk->avctx, AV_LOG_INFO, "Skipping FULL tree\n");
smk->full_tbl[0] = 0;
smk->full_last[0] = smk->full_last[1] = smk->full_last[2] = 1;
} else {
- smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size);
+ if (smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size))
+ return -1;
}
if(!get_bits1(&gb)) {
av_log(smk->avctx, AV_LOG_INFO, "Skipping TYPE tree\n");
smk->type_tbl[0] = 0;
smk->type_last[0] = smk->type_last[1] = smk->type_last[2] = 1;
} else {
- smacker_decode_header_tree(smk, &gb, &smk->type_tbl, smk->type_last, type_size);
+ if (smacker_decode_header_tree(smk, &gb, &smk->type_tbl, smk->type_last, type_size))
+ return -1;
}
return 0;
if(buf_size <= 769)
return 0;
- if(smk->pic.data[0])
- avctx->release_buffer(avctx, &smk->pic);
smk->pic.reference = 1;
smk->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
smk->pic.palette_has_changed = buf[0] & 1;
smk->pic.key_frame = !!(buf[0] & 2);
if(smk->pic.key_frame)
- smk->pic.pict_type = FF_I_TYPE;
+ smk->pic.pict_type = AV_PICTURE_TYPE_I;
else
- smk->pic.pict_type = FF_P_TYPE;
+ smk->pic.pict_type = AV_PICTURE_TYPE_P;
buf++;
for(i = 0; i < 256; i++)
return -1;
}
- decode_header_trees(c);
-
+ if (decode_header_trees(c))
+ return -1;
return 0;
}
}
+typedef struct SmackerAudioContext {
+ AVFrame frame;
+} SmackerAudioContext;
+
static av_cold int smka_decode_init(AVCodecContext *avctx)
{
+ SmackerAudioContext *s = avctx->priv_data;
+
+ 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;
+
+ avcodec_get_frame_defaults(&s->frame);
+ avctx->coded_frame = &s->frame;
+
return 0;
}
/**
* Decode Smacker audio data
*/
-static int smka_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
+static int smka_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
+ SmackerAudioContext *s = avctx->priv_data;
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;
+ int16_t *samples;
+ uint8_t *samples8;
int val;
- int i, res;
+ 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);
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;
+ *got_frame_ptr = 0;
return 1;
}
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;
+ 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 */
+ s->frame.nb_samples = unp_size / (avctx->channels * (bits + 1));
+ if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ samples = (int16_t *)s->frame.data[0];
+ samples8 = s->frame.data[0];
+
memset(vlc, 0, sizeof(VLC) * 4);
memset(h, 0, sizeof(HuffContext) * 4);
// Initialize
if(bits) { //decode 16-bit data
for(i = stereo; i >= 0; i--)
pred[i] = av_bswap16(get_bits(&gb, 16));
- for(i = 0; i < stereo; i++)
+ for(i = 0; i <= stereo; i++)
*samples++ = pred[i];
- for(i = 0; i < unp_size / 2; i++) {
+ for(; 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[3].values[res] << 8;
- pred[1] += (int16_t)val;
- *samples++ = pred[1];
+ 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;
val |= h[1].values[res] << 8;
- pred[0] += val;
- *samples++ = pred[0];
+ 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++)
+ for(i = 0; i <= stereo; i++)
*samples8++ = pred[i];
- for(i = 0; i < unp_size; i++) {
+ for(; 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];
- *samples8++ = pred[1];
+ 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;
- pred[0] += (int8_t)h[0].values[res];
- *samples8++ = pred[0];
+ pred[0] += sign_extend(h[0].values[res], 8);
+ *samples8++ = av_clip_uint8(pred[0]);
}
}
}
av_free(h[i].values);
}
- *data_size = unp_size;
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = s->frame;
+
return buf_size;
}
AVCodec ff_smacker_decoder = {
- "smackvid",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_SMACKVIDEO,
- sizeof(SmackVContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+ .name = "smackvid",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = 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 = {
- "smackaud",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_SMACKAUDIO,
- 0,
- smka_decode_init,
- NULL,
- NULL,
- smka_decode_frame,
+ .name = "smackaud",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_SMACKAUDIO,
+ .priv_data_size = sizeof(SmackerAudioContext),
+ .init = smka_decode_init,
+ .decode = smka_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Smacker audio"),
};
projects / ffmpeg / blobdiff