* Based on http://wiki.multimedia.cx/index.php?title=Smacker
*/
+#include "libavutil/bswap.h"
#include "avformat.h"
-#include "riff.h"
-#include "bswap.h"
#define SMACKER_PAL 0x01
+#define SMACKER_FLAG_RING_FRAME 0x01
enum SAudFlags {
SMK_AUD_PACKED = 0x80000000,
static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
SmackerContext *smk = s->priv_data;
AVStream *st, *ast[7];
int i, ret;
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);
int palchange = 0;
int pos;
- if (url_feof(&s->pb) || smk->cur_frame >= smk->frames)
+ 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(EIO);
smk->stream_id[smk->curstream] = smk->indexes[i];
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(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(ENOMEM);
AVInputFormat smacker_demuxer = {
"smk",
- "Smacker Video",
+ NULL_IF_CONFIG_SMALL("Smacker video"),
sizeof(SmackerContext),
smacker_probe,
smacker_read_header,