/*
- * Smacker decoder
+ * Smacker demuxer
* 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
*/
* Based on http://wiki.multimedia.cx/index.php?title=Smacker
*/
+#include "libavutil/bswap.h"
#include "avformat.h"
-#include "avi.h"
-#include "bswap.h"
+#include "riff.h"
#define SMACKER_PAL 0x01
+#define SMACKER_FLAG_RING_FRAME 0x01
enum SAudFlags {
SMK_AUD_PACKED = 0x80000000,
int stream_id[7];
int curstream;
offset_t nextpos;
+ int64_t aud_pts[7];
} SmackerContext;
typedef struct SmackerFrame {
static int smacker_probe(AVProbeData *p)
{
- if (p->buf_size < 4)
- return 0;
if(p->buf[0] == 'S' && p->buf[1] == 'M' && p->buf[2] == 'K'
&& (p->buf[3] == '2' || p->buf[3] == '4'))
return AVPROBE_SCORE_MAX;
static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
- ByteIOContext *pb = &s->pb;
- SmackerContext *smk = (SmackerContext *)s->priv_data;
+ ByteIOContext *pb = s->pb;
+ SmackerContext *smk = s->priv_data;
AVStream *st, *ast[7];
int i, ret;
int tbase;
smk->frames = get_le32(pb);
smk->pts_inc = (int32_t)get_le32(pb);
smk->flags = get_le32(pb);
+ if(smk->flags & SMACKER_FLAG_RING_FRAME)
+ smk->frames++;
for(i = 0; i < 7; i++)
smk->audio[i] = get_le32(pb);
smk->treesize = get_le32(pb);
+
+ if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant)
+ av_log(s, AV_LOG_ERROR, "treesize too large\n");
+ return -1;
+ }
+
+//FIXME remove extradata "rebuilding"
smk->mmap_size = get_le32(pb);
smk->mclr_size = get_le32(pb);
smk->full_size = get_le32(pb);
st->codec->pix_fmt = PIX_FMT_PAL8;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_SMACKVIDEO;
- st->codec->codec_tag = smk->is_ver4;
+ st->codec->codec_tag = smk->magic;
/* Smacker uses 100000 as internal timebase */
if(smk->pts_inc < 0)
smk->pts_inc = -smk->pts_inc;
if((smk->rates[i] & 0xFFFFFF) && !(smk->rates[i] & SMK_AUD_BINKAUD)){
ast[i] = av_new_stream(s, 0);
smk->indexes[i] = ast[i]->index;
- av_set_pts_info(ast[i], 33, smk->pts_inc, tbase);
ast[i]->codec->codec_type = CODEC_TYPE_AUDIO;
ast[i]->codec->codec_id = (smk->rates[i] & SMK_AUD_PACKED) ? CODEC_ID_SMACKAUDIO : CODEC_ID_PCM_U8;
- ast[i]->codec->codec_tag = 0;
+ ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A');
ast[i]->codec->channels = (smk->rates[i] & SMK_AUD_STEREO) ? 2 : 1;
ast[i]->codec->sample_rate = smk->rates[i] & 0xFFFFFF;
ast[i]->codec->bits_per_sample = (smk->rates[i] & SMK_AUD_16BITS) ? 16 : 8;
if(ast[i]->codec->bits_per_sample == 16 && ast[i]->codec->codec_id == CODEC_ID_PCM_U8)
ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
+ av_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate
+ * ast[i]->codec->channels * ast[i]->codec->bits_per_sample / 8);
}
}
if(ret != st->codec->extradata_size - 16){
av_free(smk->frm_size);
av_free(smk->frm_flags);
- return AVERROR_IO;
+ return AVERROR(EIO);
}
((int32_t*)st->codec->extradata)[0] = le2me_32(smk->mmap_size);
((int32_t*)st->codec->extradata)[1] = le2me_32(smk->mclr_size);
static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
{
- SmackerContext *smk = (SmackerContext *)s->priv_data;
+ SmackerContext *smk = s->priv_data;
int flags;
int ret;
int i;
int palchange = 0;
int pos;
- if (url_feof(&s->pb) || smk->cur_frame >= smk->frames)
- return -EIO;
+ if (url_feof(s->pb) || smk->cur_frame >= smk->frames)
+ return AVERROR(EIO);
/* if we demuxed all streams, pass another frame */
if(smk->curstream < 0) {
- url_fseek(&s->pb, smk->nextpos, 0);
+ url_fseek(s->pb, smk->nextpos, 0);
frame_size = smk->frm_size[smk->cur_frame] & (~3);
flags = smk->frm_flags[smk->cur_frame];
/* handle palette change event */
- pos = url_ftell(&s->pb);
+ pos = url_ftell(s->pb);
if(flags & SMACKER_PAL){
int size, sz, t, off, j, pos;
uint8_t *pal = smk->pal;
uint8_t oldpal[768];
memcpy(oldpal, pal, 768);
- size = get_byte(&s->pb);
+ size = get_byte(s->pb);
size = size * 4 - 1;
frame_size -= size;
frame_size--;
sz = 0;
- pos = url_ftell(&s->pb) + size;
+ pos = url_ftell(s->pb) + size;
while(sz < 256){
- t = get_byte(&s->pb);
+ t = get_byte(s->pb);
if(t & 0x80){ /* skip palette entries */
sz += (t & 0x7F) + 1;
pal += ((t & 0x7F) + 1) * 3;
} else if(t & 0x40){ /* copy with offset */
- off = get_byte(&s->pb) * 3;
+ off = get_byte(s->pb) * 3;
j = (t & 0x3F) + 1;
while(j-- && sz < 256) {
*pal++ = oldpal[off + 0];
}
} else { /* new entries */
*pal++ = smk_pal[t];
- *pal++ = smk_pal[get_byte(&s->pb) & 0x3F];
- *pal++ = smk_pal[get_byte(&s->pb) & 0x3F];
+ *pal++ = smk_pal[get_byte(s->pb) & 0x3F];
+ *pal++ = smk_pal[get_byte(s->pb) & 0x3F];
sz++;
}
}
- url_fseek(&s->pb, pos, 0);
+ url_fseek(s->pb, pos, 0);
palchange |= 1;
}
flags >>= 1;
for(i = 0; i < 7; i++) {
if(flags & 1) {
int size;
- size = get_le32(&s->pb) - 4;
+ size = get_le32(s->pb) - 4;
frame_size -= size;
frame_size -= 4;
smk->curstream++;
smk->bufs[smk->curstream] = av_realloc(smk->bufs[smk->curstream], size);
smk->buf_sizes[smk->curstream] = size;
- ret = get_buffer(&s->pb, smk->bufs[smk->curstream], size);
+ ret = get_buffer(s->pb, smk->bufs[smk->curstream], size);
if(ret != size)
- return AVERROR_IO;
+ return AVERROR(EIO);
smk->stream_id[smk->curstream] = smk->indexes[i];
}
flags >>= 1;
}
if (av_new_packet(pkt, frame_size + 768))
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
if(smk->frm_size[smk->cur_frame] & 1)
palchange |= 2;
pkt->data[0] = palchange;
memcpy(pkt->data + 1, smk->pal, 768);
- ret = get_buffer(&s->pb, pkt->data + 769, frame_size);
+ ret = get_buffer(s->pb, pkt->data + 769, frame_size);
if(ret != frame_size)
- return AVERROR_IO;
+ return AVERROR(EIO);
pkt->stream_index = smk->videoindex;
pkt->size = ret + 769;
smk->cur_frame++;
- smk->nextpos = url_ftell(&s->pb);
+ smk->nextpos = url_ftell(s->pb);
} else {
if (av_new_packet(pkt, smk->buf_sizes[smk->curstream]))
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]);
pkt->size = smk->buf_sizes[smk->curstream];
pkt->stream_index = smk->stream_id[smk->curstream];
+ pkt->pts = smk->aud_pts[smk->curstream];
+ smk->aud_pts[smk->curstream] += AV_RL32(pkt->data);
smk->curstream--;
}
static int smacker_read_close(AVFormatContext *s)
{
- SmackerContext *smk = (SmackerContext *)s->priv_data;
+ SmackerContext *smk = s->priv_data;
int i;
for(i = 0; i < 7; i++)
if(smk->frm_flags)
av_free(smk->frm_flags);
- for(i=0;i<s->nb_streams;i++) {
- AVStream *st = s->streams[i];
- if(st->codec->extradata)
- av_free(st->codec->extradata);
- }
return 0;
}
-static AVInputFormat smacker_iformat = {
+AVInputFormat smacker_demuxer = {
"smk",
"Smacker Video",
sizeof(SmackerContext),
smacker_read_packet,
smacker_read_close,
};
-
-int smacker_init(void)
-{
- av_register_input_format(&smacker_iformat);
- return 0;
-}
projects / ffmpeg / blobdiff