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Implement rule-number parsing, the initial step in stream (and bitrate)

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selection. See discussion in ML thread "[PATCH] RDT/Realmedia patches #2".

Originally committed as revision 15966 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2008-12-01 00:08:42 +00:00
parent ff7f75e185
commit 7960e18fdf
1 changed files with 16 additions and 5 deletions
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21
libavformat/rdt.c
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@ -47,7 +47,7 @@ struct RDTDemuxContext {
void *dynamic_protocol_context;
DynamicPayloadPacketHandlerProc parse_packet;
uint32_t prev_timestamp;
int prev_set_id;
int prev_set_id, prev_stream_id;
};
RDTDemuxContext *
@ -65,6 +65,7 @@ ff_rdt_parse_open(AVFormatContext *ic, int first_stream_of_set_idx,
} while (first_stream_of_set_idx + s->n_streams < ic->nb_streams &&
s->streams[s->n_streams]->priv_data == s->streams[0]->priv_data);
s->prev_set_id = -1;
s->prev_stream_id = -1;
s->prev_timestamp = -1;
s->parse_packet = handler->parse_packet;
s->dynamic_protocol_context = priv_data;
@ -334,11 +335,12 @@ ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
if (!s->parse_packet)
return -1;
if (!buf) {
if (!buf && s->prev_stream_id != -1) {
/* return the next packets, if any */
timestamp= 0; ///< Should not be used if buf is NULL, but should be set to the timestamp of the packet returned....
rv= s->parse_packet(s->dynamic_protocol_context,
s->streams[0], pkt, &timestamp, NULL, 0, flags);
s->streams[s->prev_stream_id],
pkt, &timestamp, NULL, 0, flags);
return rv;
}
@ -347,16 +349,25 @@ ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
rv = ff_rdt_parse_header(buf, len, &set_id, &seq_no, &stream_id, &is_keyframe, &timestamp);
if (rv < 0)
return rv;
if (is_keyframe && (set_id != s->prev_set_id || timestamp != s->prev_timestamp)) {
if (is_keyframe &&
(set_id != s->prev_set_id || timestamp != s->prev_timestamp ||
stream_id != s->prev_stream_id)) {
flags |= PKT_FLAG_KEY;
s->prev_set_id = set_id;
s->prev_timestamp = timestamp;
}
s->prev_stream_id = stream_id;
buf += rv;
len -= rv;
if (s->prev_stream_id >= s->n_streams) {
s->prev_stream_id = -1;
return -1;
}
rv = s->parse_packet(s->dynamic_protocol_context,
s->streams[0], pkt, &timestamp, buf, len, flags);
s->streams[s->prev_stream_id],
pkt, &timestamp, buf, len, flags);
return rv;
}