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refine code for bug #194, add comments to macros.

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winlin 2014-11-13 12:45:54 +08:00
parent cc6aca9ad5
commit 4af2e78c59
5 changed files with 34 additions and 8 deletions
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29
trunk/src/kernel/srs_kernel_consts.hpp
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@ -78,6 +78,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// the timeout to wait for client control message,
// if timeout, we generally ignore and send the data to client,
// generally, it's the pulse time for data seding.
// @remark, recomment to 500ms.
#define SRS_CONSTS_RTMP_PULSE_TIMEOUT_US (int64_t)(500*1000LL)
/**
@ -97,18 +98,42 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// always use fmt0 as cache.
//#define SRS_CONSTS_RTMP_MAX_FMT3_HEADER_SIZE 5
/**
* how many msgs can be send entirely.
* for play clients to get msgs then totally send out.
* for example, 25fps video, 40ms per video packet,
* while audio is 20ms per audio packet where 2/3 is audios,
* when SYS_CONSTS_MAX_PLAY_SEND_MSGS is 128, then
* we will send all 128*40ms/3=1706ms packets in a time,
* which should greater than the SRS_CONSTS_RTMP_PULSE_TIMEOUT_US
* (for example, 500ms), that is, we should:
* SYS_CONSTS_MAX_PLAY_SEND_MSGS * 40 / 3 >= SRS_CONSTS_RTMP_PULSE_TIMEOUT_US
* @remark, recomment to 128.
*/
#define SYS_CONSTS_MAX_PLAY_SEND_MSGS 128
/**
* for performance issue,
* the iovs cache, @see https://github.com/winlinvip/simple-rtmp-server/issues/194
* iovs cache for multiple messages for each connections.
* each iovc is 16bytes, sizeof(iovec)=16, suppose the chunk size is 64k,
* each message send in a chunk which needs only 2 iovec,
* so the iovs max should be (SYS_CONSTS_MAX_PLAY_SEND_MSGS * 16 * 2)
*
* @remark, SRS will realloc when the iovs not enough.
*/
#define SRS_CONSTS_IOVS_MAX 1024
#define SRS_CONSTS_IOVS_MAX (SYS_CONSTS_MAX_PLAY_SEND_MSGS * 32)
/**
* for performance issue,
* the c0c3 cache, @see https://github.com/winlinvip/simple-rtmp-server/issues/194
* c0c3 cache for multiple messages for each connections.
* each c0 <= 16byes, suppose the chunk size is 64k,
* each message send in a chunk which needs only a c0 header,
* so the c0c3 cache should be (SYS_CONSTS_MAX_PLAY_SEND_MSGS * 16)
*
* @remark, SRS will try another loop when c0c3 cache dry, for we cannot realloc it.
* so we use larger c0c3 cache, that is (SYS_CONSTS_MAX_PLAY_SEND_MSGS * 32)
*/
#define SRS_CONSTS_C0C3_HEADERS_MAX 4096
#define SRS_CONSTS_C0C3_HEADERS_MAX (SYS_CONSTS_MAX_PLAY_SEND_MSGS * 32)
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