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refine the fast buffer to more readable.

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This commit is contained in:
winlin 2015-03-18 16:50:47 +08:00
parent f36e4a443d
commit fbd722bf76
1 changed files with 17 additions and 12 deletions
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29
trunk/src/protocol/srs_rtmp_buffer.cpp
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@ -82,17 +82,21 @@ char* SrsFastBuffer::bytes()
void SrsFastBuffer::set_buffer(int buffer_size)
{
// never exceed the max size.
if (buffer_size > SRS_MAX_SOCKET_BUFFER) {
srs_warn("limit the user-space buffer from %d to %d",
buffer_size, SRS_MAX_SOCKET_BUFFER);
}
// the user-space buffer size limit to a max value.
int nb_resize_buf = srs_min(buffer_size, SRS_MAX_SOCKET_BUFFER);
if (buffer_size > SRS_MAX_SOCKET_BUFFER) {
srs_warn("limit the user-space buffer from %d to %d", buffer_size, SRS_MAX_SOCKET_BUFFER);
}
// only realloc when buffer changed bigger
if (nb_resize_buf <= nb_buffer) {
return;
}
// realloc for buffer change bigger.
int start = p - buffer;
int nb_bytes = end - p;
@ -148,6 +152,7 @@ int SrsFastBuffer::grow(ISrsBufferReader* reader, int required_size)
srs_assert(nb_exists_bytes >= 0);
srs_verbose("move fast buffer %d bytes", nb_exists_bytes);
// reset or move to get more space.
if (!nb_exists_bytes) {
// reset when buffer is empty.
p = end = buffer;
@ -159,15 +164,15 @@ int SrsFastBuffer::grow(ISrsBufferReader* reader, int required_size)
p = buffer;
end = p + nb_exists_bytes;
}
}
// check whether enough free space in buffer.
nb_free_space = buffer + nb_buffer - end;
if (nb_free_space < required_size) {
ret = ERROR_READER_BUFFER_OVERFLOW;
srs_error("buffer overflow, required=%d, max=%d, left=%d, ret=%d",
required_size, nb_buffer, nb_free_space, ret);
return ret;
// check whether enough free space in buffer.
nb_free_space = buffer + nb_buffer - end;
if (nb_free_space < required_size) {
ret = ERROR_READER_BUFFER_OVERFLOW;
srs_error("buffer overflow, required=%d, max=%d, left=%d, ret=%d",
required_size, nb_buffer, nb_free_space, ret);
return ret;
}
}
// buffer is ok, read required size of bytes.