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lavf: make read_from_packet_buffer() more flexible. 

Make packet buffer a parameter, don't hardcode it to be
AVFormatContext.packet_buffer.

Also move the function higher in the file, since it will be called from
read_frame_internal().
This commit is contained in:
Anton Khirnov 2012-03-03 16:28:32 +01:00
parent 52b0943f10
commit dcee811505
1 changed files with 20 additions and 12 deletions
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32
libavformat/utils.c
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@ -1011,6 +1011,21 @@ static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_en
*pkt_buf_end = NULL;
}
static int read_from_packet_buffer(AVPacketList **pkt_buffer,
AVPacketList **pkt_buffer_end,
AVPacket *pkt)
{
AVPacketList *pktl;
av_assert0(*pkt_buffer);
pktl = *pkt_buffer;
*pkt = pktl->pkt;
*pkt_buffer = pktl->next;
if (!pktl->next)
*pkt_buffer_end = NULL;
av_freep(&pktl);
return 0;
}
static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
{
@ -1171,23 +1186,15 @@ static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
return 0;
}
static int read_from_packet_buffer(AVFormatContext *s, AVPacket *pkt)
{
AVPacketList *pktl = s->packet_buffer;
av_assert0(pktl);
*pkt = pktl->pkt;
s->packet_buffer = pktl->next;
av_freep(&pktl);
return 0;
}
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
{
const int genpts = s->flags & AVFMT_FLAG_GENPTS;
int eof = 0;
if (!genpts)
return s->packet_buffer ? read_from_packet_buffer(s, pkt) :
return s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
&s->packet_buffer_end,
pkt) :
read_frame_internal(s, pkt);
for (;;) {
@ -1213,7 +1220,8 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
/* read packet from packet buffer, if there is data */
if (!(next_pkt->pts == AV_NOPTS_VALUE &&
next_pkt->dts != AV_NOPTS_VALUE && !eof))
return read_from_packet_buffer(s, pkt);
return read_from_packet_buffer(&s->packet_buffer,
&s->packet_buffer_end, pkt);
}
ret = read_frame_internal(s, pkt);