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seeking in rm

Originally committed as revision 3737 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-12-06 22:44:03 +00:00
parent 80016c48b0
commit bc17df09d4
2 changed files with 102 additions and 44 deletions

View File

@ -400,20 +400,28 @@ static int rv20_decode_picture_header(MpegEncContext *s)
}
if(s->avctx->has_b_frames){
int f1=9;
int f2=9;
int f3=9;
if (get_bits(&s->gb, 1)){
// av_log(s->avctx, AV_LOG_ERROR, "unknown bit3 set\n");
av_log(s->avctx, AV_LOG_ERROR, "unknown bit3 set\n");
// return -1;
}
seq= get_bits(&s->gb, 14)<<1;
if(s->avctx->extradata_size >= 4 && ((uint8_t*)s->avctx->extradata)[1]&1){
get_bits(&s->gb, 1);
f1= get_bits(&s->gb, 1);
}
if(s->avctx->extradata_size >= 4 && ((uint8_t*)s->avctx->extradata)[1]&2){
get_bits(&s->gb, 1);
f2= get_bits(&s->gb, 1);
}
if(s->avctx->extradata_size >= 4 && ((uint8_t*)s->avctx->extradata)[1]&4){
get_bits(&s->gb, 2);
f3= get_bits(&s->gb, 2);
}
if(s->avctx->debug & FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_DEBUG, "F %d %d %d\n", f1,f2,f3);
}
mb_pos= get_bits(&s->gb, av_log2(s->mb_num-1)+1);
@ -733,6 +741,7 @@ AVCodec rv20_decoder = {
NULL,
rv10_decode_end,
rv10_decode_frame,
CODEC_CAP_DR1
CODEC_CAP_DR1,
.flush= ff_mpeg_flush,
};

View File

@ -720,15 +720,62 @@ static int get_num(ByteIOContext *pb, int *len)
/* multiple of 20 bytes for ra144 (ugly) */
#define RAW_PACKET_SIZE 1000
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index){
RMContext *rm = s->priv_data;
ByteIOContext *pb = &s->pb;
int len, num, res, i;
AVStream *st;
while(!url_feof(pb)){
if(rm->remaining_len > 0){
num= rm->current_stream;
len= rm->remaining_len;
*timestamp = AV_NOPTS_VALUE;
*flags= 0;
}else{
if(get_byte(pb))
continue;
if(get_byte(pb))
continue;
len = get_be16(pb);
if (len < 12)
continue;
num = get_be16(pb);
*timestamp = get_be32(pb);
res= get_byte(pb); /* reserved */
*flags = get_byte(pb); /* flags */
// av_log(s, AV_LOG_DEBUG, "%d %Ld %X %X\n", num, *timestamp, *flags, res);
len -= 12;
}
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (num == st->id)
break;
}
if (i == s->nb_streams) {
/* skip packet if unknown number */
url_fskip(pb, len);
rm->remaining_len -= len;
continue;
}
*stream_index= i;
return len;
}
return -1;
}
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
{
RMContext *rm = s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st;
int num, i, len, tmp, j;
int i, len, tmp, j;
int64_t timestamp;
uint8_t *ptr;
int flags, res;
int flags;
if (rm->old_format) {
/* just read raw bytes */
@ -743,44 +790,11 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->size = len;
st = s->streams[0];
} else {
redo:
if (url_feof(pb))
len=sync(s, &timestamp, &flags, &i);
if(len<0)
return AVERROR_IO;
if(rm->remaining_len > 0){
num= rm->current_stream;
len= rm->remaining_len;
timestamp = AV_NOPTS_VALUE;
flags= 0;
}else{
if(get_byte(pb))
goto redo;
if(get_byte(pb))
goto redo;
len = get_be16(pb);
if (len < 12)
goto redo;
num = get_be16(pb);
timestamp = get_be32(pb);
res= get_byte(pb); /* reserved */
flags = get_byte(pb); /* flags */
// av_log(s, AV_LOG_DEBUG, "%d %d %X %d\n", num, timestamp, flags, res);
len -= 12;
}
st = NULL;
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (num == st->id)
break;
}
if (i == s->nb_streams) {
/* skip packet if unknown number */
url_fskip(pb, len);
goto redo;
}
st = s->streams[i];
if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
int h, pic_num, len2, pos;
@ -861,6 +875,39 @@ static int rm_probe(AVProbeData *p)
return 0;
}
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
int64_t *ppos, int64_t pos_limit)
{
RMContext *rm = s->priv_data;
int64_t pos, dts;
int stream_index2, flags, len;
pos = *ppos;
if(rm->old_format)
return AV_NOPTS_VALUE;
url_fseek(&s->pb, pos, SEEK_SET);
rm->remaining_len=0;
for(;;){
pos= url_ftell(&s->pb);
len=sync(s, &dts, &flags, &stream_index2);
if(len<0)
return AV_NOPTS_VALUE;
av_log(s, AV_LOG_DEBUG, "%d %d-%d %Ld\n", flags, stream_index2, stream_index, dts);
if(flags&2){
av_add_index_entry(s->streams[stream_index2], pos, dts, 0, AVINDEX_KEYFRAME);
if(stream_index2 == stream_index){
break;
}
}
url_fskip(&s->pb, len);
}
*ppos = pos;
return dts;
}
static AVInputFormat rm_iformat = {
"rm",
"rm format",
@ -869,6 +916,8 @@ static AVInputFormat rm_iformat = {
rm_read_header,
rm_read_packet,
rm_read_close,
NULL,
rm_read_dts,
};
#ifdef CONFIG_ENCODERS