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10l (bytes_left() -> url_feof())

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10l (updating LRU delta pts for type 1/2 frames)
ensure that checksumming isnt enabled if its not needed
search for next startcode and then search backward to the next valid frame if an inconsistancy is detected
deal with non-frame startcodes in the middle of the stream

Originally committed as revision 2972 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2004-04-06 17:40:17 +00:00
parent 4568325a18
commit 465e1dadbe
2 changed files with 120 additions and 58 deletions
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13
libavformat/aviobuf.c
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@ -48,7 +48,6 @@ int init_put_byte(ByteIOContext *s,
s->eof_reached = 0;
s->is_streamed = 0;
s->max_packet_size = 0;
s->checksum_ptr= NULL;
s->update_checksum= NULL;
return 0;
}
@ -60,7 +59,7 @@ static void flush_buffer(ByteIOContext *s)
if (s->buf_ptr > s->buffer) {
if (s->write_packet)
s->write_packet(s->opaque, s->buffer, s->buf_ptr - s->buffer);
if(s->checksum_ptr){
if(s->update_checksum){
s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
s->checksum_ptr= s->buffer;
}
@ -250,7 +249,7 @@ static void fill_buffer(ByteIOContext *s)
if (s->eof_reached)
return;
if(s->checksum_ptr){
if(s->update_checksum){
s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_end - s->checksum_ptr);
s->checksum_ptr= s->buffer;
}
@ -269,14 +268,16 @@ static void fill_buffer(ByteIOContext *s)
unsigned long get_checksum(ByteIOContext *s){
s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
s->checksum_ptr= NULL;
s->update_checksum= NULL;
return s->checksum;
}
void init_checksum(ByteIOContext *s, unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum){
s->update_checksum= update_checksum;
s->checksum= s->update_checksum(checksum, NULL, 0);
s->checksum_ptr= s->buf_ptr;
if(s->update_checksum){
s->checksum= s->update_checksum(checksum, NULL, 0);
s->checksum_ptr= s->buf_ptr;
}
}
/* NOTE: return 0 if EOF, so you cannot use it if EOF handling is