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various demuxer fixes 

Originally committed as revision 3734 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-12-06 18:57:59 +00:00
parent 18ade9543f
commit a8b81ec199
1 changed files with 31 additions and 20 deletions
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51
libavformat/rm.c
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@ -40,6 +40,8 @@ typedef struct {
int data_pos; /* position of the data after the header */
int nb_packets;
int old_format;
int current_stream;
int remaining_len;
} RMContext;
#ifdef CONFIG_ENCODERS
@ -723,7 +725,8 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
RMContext *rm = s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st;
int len, num, timestamp, i, tmp, j;
int num, i, len, tmp, j;
int64_t timestamp;
uint8_t *ptr;
int flags, res;
@ -741,6 +744,12 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
st = s->streams[0];
} else {
redo:
if(rm->remaining_len){
num= rm->current_stream;
len= rm->remaining_len;
timestamp = AV_NOPTS_VALUE;
flags= 0;
}else{
if (rm->nb_packets == 0)
return AVERROR_IO;
get_be16(pb);
@ -756,6 +765,7 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
rm->nb_packets--;
len -= 12;
}
st = NULL;
for(i=0;i<s->nb_streams;i++) {
@ -770,28 +780,29 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
}
if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
int full_frame, h, pic_num;
h= get_byte(pb);
if ((h & 0xc0) == 0xc0) {
int len2, pos;
full_frame = 1;
len2= get_num(pb, &len);
int h, pic_num, len2, pos;
h= get_byte(pb); len--;
if(!(h & 0x40)){
int seq = get_byte(pb);
len--;
}
if((h & 0xc0) == 0x40){
len2= pos= 0;
}else{
len2 = get_num(pb, &len);
pos = get_num(pb, &len);
//printf("pos:%d\n",len);
len -= 2;
} else {
int seq, frame_size, pos;
full_frame = 0;
seq = get_byte(pb);
frame_size = get_num(pb, &len);
pos = get_num(pb, &len);
//printf("seq:%d, size:%d, pos:%d\n",seq,frame_size,pos);
len -= 3;
}
/* picture number */
pic_num= get_byte(pb);
// av_log(NULL, AV_LOG_DEBUG, "%X %d\n", h, pic_num);
pic_num= get_byte(pb); len--;
rm->remaining_len= len;
rm->current_stream= st->id;
// av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
if(len2 && len2<len)
len=len2;
rm->remaining_len-= len;
}
av_new_packet(pkt, len);