peerstreamer-src / src / msg_buffer.c @ a8a91b7e
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#include <stdio.h> |
|---|---|
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#include <stdlib.h> |
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#include <string.h> |
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#include "msg_buffer.h" |
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|
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|
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struct msg_buffer_slot {
|
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uint8_t *buf; |
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uint32_t size; |
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int busy;
|
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}; |
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|
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struct msg_buffer {
|
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struct msg_buffer_slot *slots;
|
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uint32_t nslots; |
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int32_t next_slot_push; |
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int32_t next_slot_pop; |
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|
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struct timeval last_push;
|
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struct timeval last_pop;
|
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|
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uint32_t size; |
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uint32_t busy_slots; |
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|
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int buffer_started;
|
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struct timeval buffer_started_tv;
|
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uint32_t start_buf_to_us; |
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uint32_t start_buf_size_th; |
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int start_buf_complete;
|
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int data_ready;
|
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int slow_mode; /* 0 disabled, 1 use th1 parameters, 2 use th2 parameters */ |
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uint32_t th1_size; |
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uint32_t th1_to; |
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uint32_t th2_size; |
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uint32_t th2_to; |
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|
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uint32_t flush_to_us; |
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int flushing;
|
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|
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uint32_t min_to_us; |
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|
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int32_t next_slot_parse; |
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|
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int debug;
|
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char *buf_id;
|
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}; |
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|
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/* Return 1 if the difference (t2 - t1) is negative, otherwise 0. */
|
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static int msg_buffer_timeval_subtract(struct timeval *result, |
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struct timeval *t2,
|
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struct timeval *t1)
|
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{
|
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long int diff = (t2->tv_usec + 1000000 * t2->tv_sec) - |
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(t1->tv_usec + 1000000 * t1->tv_sec);
|
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result->tv_sec = diff / 1000000;
|
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result->tv_usec = diff % 1000000;
|
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|
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return (diff < 0); |
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} |
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|
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static int msg_buffer_increase_n_slots(struct msg_buffer *msgb) |
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{
|
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uint32_t new_nslots = msgb->nslots << 1;
|
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int i;
|
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int32_t next_slot_copy = msgb->next_slot_pop; |
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|
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struct msg_buffer_slot * new_slots = (struct msg_buffer_slot *) |
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malloc(sizeof(struct msg_buffer_slot) * new_nslots); |
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|
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if (!new_slots) {
|
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fprintf(stderr, |
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"RTP_BUFFER ERROR (%s): new_slots allocation failed\n",
|
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msgb->buf_id); |
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return -1; |
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} |
| 76 |
|
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i = 0;
|
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while (i < msgb->nslots) {
|
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(new_slots + i)->buf = (msgb->slots + next_slot_copy)->buf; |
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(new_slots + i)->size = (msgb->slots + next_slot_copy)->size; |
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(new_slots + i)->busy = (msgb->slots + next_slot_copy)->busy; |
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|
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i++; |
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|
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next_slot_copy = (next_slot_copy + 1) % msgb->nslots;
|
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} |
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|
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free(msgb->slots); |
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|
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if (msgb->next_slot_parse != MSG_BUFFER_INVALID_SLOT_IDX) {
|
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if (msgb->next_slot_parse >= msgb->next_slot_pop) {
|
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msgb->next_slot_parse = msgb->next_slot_parse - |
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msgb->next_slot_pop; |
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} else {
|
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msgb->next_slot_parse = |
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(msgb->nslots - msgb->next_slot_pop) + |
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msgb->next_slot_parse; |
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} |
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} |
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|
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msgb->slots = new_slots; |
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msgb->nslots = new_nslots; |
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msgb->next_slot_pop = 0;
|
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msgb->next_slot_push = i; |
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|
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return 0; |
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} |
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|
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static void msg_buffer_check_start_buf_to(struct msg_buffer *msgb) |
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{
|
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if (msgb->buffer_started && (msgb->start_buf_to_us > 0)) { |
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struct timeval tv_now, tv_diff;
|
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gettimeofday(&tv_now, NULL);
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msg_buffer_timeval_subtract(&tv_diff, &tv_now, |
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&(msgb->buffer_started_tv)); |
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if ((tv_diff.tv_usec + 1000000 * tv_diff.tv_sec) >= |
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msgb->start_buf_to_us) {
|
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if (msgb->debug) {
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fprintf(stdout, |
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"RTP_BUFFER (%s): initial buffering TO\n",
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msgb->buf_id); |
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} |
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msgb->start_buf_complete = 1;
|
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} |
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} |
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} |
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|
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struct msg_buffer *msg_buffer_init(int debug, char *id) |
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{
|
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struct msg_buffer *msgb = (struct msg_buffer *) |
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malloc(sizeof(struct msg_buffer)); |
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|
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if (!msgb) {
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fprintf(stderr, |
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"ERROR: struct msg_buffer memory allocation failed\n");
|
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goto msgb_err;
|
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} |
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|
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memset(msgb, 0, sizeof(struct msg_buffer)); |
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|
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if (!id) {
|
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fprintf(stderr, "RTP_BUFFER ERROR: id parameter is NULL\n");
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goto id_err;
|
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} |
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|
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msgb->buf_id = (char *) malloc(strlen(id) + 1); |
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|
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if (!(msgb->buf_id)) {
|
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fprintf(stderr, "RTP_BUFFER ERROR: buf_id allocation failed\n");
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goto id_err;
|
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} |
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|
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strncpy(msgb->buf_id, id, strlen(id) + 1);
|
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|
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msgb->slots = (struct msg_buffer_slot *)
|
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malloc(sizeof(struct msg_buffer_slot) * |
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MSG_BUFFER_N_START_SLOT); |
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|
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if (!(msgb->slots)) {
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fprintf(stderr, "RTP_BUFFER ERROR (%s): "
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"struct msg_buffer_slots memory allocation failed\n",
|
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msgb->buf_id); |
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goto slots_err;
|
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} |
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|
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memset(msgb->slots, 0,
|
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sizeof(struct msg_buffer_slot) * MSG_BUFFER_N_START_SLOT); |
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|
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msgb->nslots = MSG_BUFFER_N_START_SLOT; |
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msgb->next_slot_push = 0;
|
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msgb->next_slot_pop = MSG_BUFFER_INVALID_SLOT_IDX; |
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gettimeofday(&(msgb->last_push), NULL);
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gettimeofday(&(msgb->last_pop), NULL);
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msgb->size = 0;
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msgb->busy_slots = 0;
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msgb->buffer_started = 0;
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msgb->start_buf_to_us = 0;
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msgb->start_buf_size_th = MSG_BUFFER_START_BUF_SIZE_TH; |
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msgb->start_buf_complete = 0;
|
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msgb->data_ready = 0;
|
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msgb->slow_mode = MSG_BUFFER_SLOW_MODE_TH2; |
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msgb->th1_size = MSG_BUFFER_TH1_SIZE; |
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msgb->th1_to = MSG_BUFFER_TH1_TO_US; |
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msgb->th2_size = MSG_BUFFER_TH2_SIZE; |
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msgb->th2_to = MSG_BUFFER_TH2_TO_US; |
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msgb->flush_to_us = MSG_BUFFER_FLUSH_TO_US; |
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msgb->flushing = 0;
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msgb->min_to_us = MSG_BUFFER_MIN_TO_US; |
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msgb->next_slot_parse = MSG_BUFFER_INVALID_SLOT_IDX; |
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msgb->debug = debug; |
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|
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return msgb;
|
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|
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slots_err:
|
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free(msgb->buf_id); |
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id_err:
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free(msgb); |
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msgb_err:
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return NULL; |
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} |
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|
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void msg_buffer_destroy(struct msg_buffer **msgb) |
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{
|
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uint32_t i; |
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|
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if (*msgb) {
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for (i = 0; i < (*msgb)->nslots; i++) { |
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if (((*msgb)->slots + i)->busy) {
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free(((*msgb)->slots + i)->buf); |
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((*msgb)->slots + i)->buf = NULL;
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((*msgb)->slots + i)->size = 0;
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((*msgb)->slots + i)->busy = 0;
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} |
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} |
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|
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free((*msgb)->slots); |
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free((*msgb)->buf_id); |
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free((*msgb)); |
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|
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*msgb = NULL;
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} |
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} |
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|
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int msg_buffer_push(struct msg_buffer *msgb, uint8_t *buf, uint32_t size) |
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{
|
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int res = 0; |
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uint8_t *new_buf = NULL;
|
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|
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/* If all slots are busy, allocate new ones */
|
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if ((msgb->busy_slots > 0) && |
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(msgb->next_slot_push == msgb->next_slot_pop)) {
|
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if ((res = msg_buffer_increase_n_slots(msgb)) == -1) { |
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fprintf(stderr, "RTP_BUFFER ERROR (%s): "
|
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"msg_buffer_increase_n_slots()\n",
|
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msgb->buf_id); |
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return res;
|
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} |
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} |
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|
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/* Copy the new buffer into the next slot */
|
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new_buf = (uint8_t *) malloc(size); |
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if (!new_buf) {
|
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fprintf(stderr, "RTP_BUFFER ERROR (%s): buffer push failed\n",
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msgb->buf_id); |
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res = -1;
|
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return res;
|
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} |
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|
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memcpy(new_buf, buf, size); |
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(msgb->slots + msgb->next_slot_push)->buf = new_buf; |
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(msgb->slots + msgb->next_slot_push)->size = size; |
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(msgb->slots + msgb->next_slot_push)->busy = 1;
|
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|
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if (msgb->debug) {
|
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fprintf(stdout, "RTP_BUFFER (%s): "
|
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"pushed %d bytes in slot %d (tot. size %u)\n",
|
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msgb->buf_id, size, msgb->next_slot_push, |
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msgb->size + size); |
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} |
| 260 |
|
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if (msgb->next_slot_pop == MSG_BUFFER_INVALID_SLOT_IDX) {
|
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msgb->next_slot_pop = msgb->next_slot_push; |
| 263 |
} |
| 264 |
|
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msgb->next_slot_push = (msgb->next_slot_push + 1) % msgb->nslots;
|
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msgb->size += size; |
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msgb->busy_slots++; |
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msgb->flushing = 0;
|
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gettimeofday(&(msgb->last_push), NULL);
|
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|
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if (!(msgb->buffer_started)) {
|
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msgb->buffer_started = 1;
|
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gettimeofday(&(msgb->buffer_started_tv), NULL);
|
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} |
| 275 |
|
| 276 |
if (msgb->size >= msgb->th1_size) {
|
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msgb->data_ready = 1;
|
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msgb->slow_mode = MSG_BUFFER_SLOW_MODE_DISABLED; |
| 279 |
} |
| 280 |
/* else if (msgb->size >= msgb->th2_size) {
|
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msgb->slow_mode = 1;
|
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} */
|
| 283 |
|
| 284 |
if (!(msgb->start_buf_complete)) {
|
| 285 |
if (msgb->size >= msgb->start_buf_size_th) {
|
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msgb->start_buf_complete = 1;
|
| 287 |
} else {
|
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msg_buffer_check_start_buf_to(msgb); |
| 289 |
} |
| 290 |
} |
| 291 |
|
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return res;
|
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} |
| 294 |
|
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int msg_buffer_pop(struct msg_buffer *msgb, uint8_t **buf) |
| 296 |
{
|
| 297 |
int size = 0; |
| 298 |
|
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if (msgb->next_slot_pop == MSG_BUFFER_INVALID_SLOT_IDX) {
|
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*buf = NULL;
|
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return size;
|
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} |
| 303 |
|
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*buf = (msgb->slots + msgb->next_slot_pop)->buf; |
| 305 |
size = (msgb->slots + msgb->next_slot_pop)->size; |
| 306 |
|
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(msgb->slots + msgb->next_slot_pop)->buf = NULL;
|
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(msgb->slots + msgb->next_slot_pop)->size = 0;
|
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(msgb->slots + msgb->next_slot_pop)->busy = 0;
|
| 310 |
|
| 311 |
if (msgb->debug) {
|
| 312 |
fprintf(stdout, "RTP_BUFFER (%s): "
|
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"popped %d bytes in slot %d (tot. size %u)\n",
|
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msgb->buf_id, size, msgb->next_slot_pop, |
| 315 |
msgb->size - size); |
| 316 |
} |
| 317 |
|
| 318 |
msgb->next_slot_pop = (msgb->next_slot_pop + 1) % msgb->nslots;
|
| 319 |
(msgb->busy_slots)--; |
| 320 |
msgb->size -= size; |
| 321 |
gettimeofday(&(msgb->last_pop), NULL);
|
| 322 |
|
| 323 |
if (msgb->busy_slots == 0) { |
| 324 |
msgb->next_slot_pop = MSG_BUFFER_INVALID_SLOT_IDX; |
| 325 |
} |
| 326 |
|
| 327 |
if (msgb->size < msgb->th1_size) {
|
| 328 |
msgb->data_ready = 0;
|
| 329 |
|
| 330 |
if (msgb->slow_mode != MSG_BUFFER_SLOW_MODE_TH2) {
|
| 331 |
msgb->slow_mode = MSG_BUFFER_SLOW_MODE_TH1; |
| 332 |
} |
| 333 |
} |
| 334 |
|
| 335 |
if (msgb->size < msgb->th2_size) {
|
| 336 |
msgb->slow_mode = MSG_BUFFER_SLOW_MODE_TH2; |
| 337 |
} |
| 338 |
|
| 339 |
return size;
|
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} |
| 341 |
|
| 342 |
int msg_buffer_get_status(struct msg_buffer *msgb, struct timeval *tv) |
| 343 |
{
|
| 344 |
struct timeval tv_now, tv_flush, tv_diff;
|
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long to;
|
| 346 |
|
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msg_buffer_check_start_buf_to(msgb); |
| 348 |
|
| 349 |
gettimeofday(&tv_now, NULL);
|
| 350 |
msg_buffer_timeval_subtract(&tv_flush, &tv_now, &(msgb->last_push)); |
| 351 |
|
| 352 |
if (!(msgb->flushing) && msgb->start_buf_complete &&
|
| 353 |
((tv_flush.tv_usec + 1000000 * tv_flush.tv_sec) >
|
| 354 |
msgb->flush_to_us)) {
|
| 355 |
fprintf(stdout, |
| 356 |
"RTP_BUFFER (%s): flush (size %u, busy slots %u)\n",
|
| 357 |
msgb->buf_id, msgb->size, msgb->busy_slots); |
| 358 |
msgb->flushing = 1;
|
| 359 |
} |
| 360 |
|
| 361 |
if ((msgb->next_slot_pop != MSG_BUFFER_INVALID_SLOT_IDX) &&
|
| 362 |
msgb->flushing) {
|
| 363 |
if (tv) {
|
| 364 |
tv->tv_sec = 0;
|
| 365 |
tv->tv_usec = msgb->min_to_us; |
| 366 |
} |
| 367 |
return MSG_BUFFER_DATA_READY;
|
| 368 |
} |
| 369 |
|
| 370 |
if ((msgb->next_slot_pop == MSG_BUFFER_INVALID_SLOT_IDX) &&
|
| 371 |
(msgb->flushing)) {
|
| 372 |
fprintf(stdout, |
| 373 |
"RTP_BUFFER (%s): flush complete\n", msgb->buf_id);
|
| 374 |
if (tv) {
|
| 375 |
tv->tv_sec = 0;
|
| 376 |
tv->tv_usec = msgb->min_to_us; |
| 377 |
} |
| 378 |
return MSG_BUFFER_DATA_FLUSHED;
|
| 379 |
} |
| 380 |
|
| 381 |
msg_buffer_timeval_subtract(&tv_diff, &tv_now, &(msgb->last_pop)); |
| 382 |
|
| 383 |
if (msgb->debug) {
|
| 384 |
fprintf(stdout, "RTP_BUFFER (%s): "
|
| 385 |
"size %u (busy slots %u), TH2 %u, TH1 %u\n",
|
| 386 |
msgb->buf_id, msgb->size, msgb->busy_slots, |
| 387 |
msgb->th2_size, msgb->th1_size); |
| 388 |
} |
| 389 |
|
| 390 |
if (!(msgb->start_buf_complete) ||
|
| 391 |
(msgb->next_slot_pop == MSG_BUFFER_INVALID_SLOT_IDX)) {
|
| 392 |
|
| 393 |
if (tv) {
|
| 394 |
to = msgb->th2_to; |
| 395 |
tv->tv_sec = to / 1000000;
|
| 396 |
tv->tv_usec = to % 1000000;
|
| 397 |
} |
| 398 |
|
| 399 |
if (msgb->debug) {
|
| 400 |
fprintf(stdout, "RTP_BUFFER (%s): "
|
| 401 |
"start buffering incomplete or buffer empty"
|
| 402 |
"(size %u)\n", msgb->buf_id, msgb->size);
|
| 403 |
} |
| 404 |
|
| 405 |
if (!(msgb->start_buf_complete)) {
|
| 406 |
return MSG_BUFFER_DATA_START_BUF;
|
| 407 |
} else {
|
| 408 |
return MSG_BUFFER_DATA_NOT_READY;
|
| 409 |
} |
| 410 |
} |
| 411 |
|
| 412 |
if (msgb->data_ready) {
|
| 413 |
if (tv) {
|
| 414 |
tv->tv_sec = 0;
|
| 415 |
tv->tv_usec = msgb->min_to_us; |
| 416 |
} |
| 417 |
|
| 418 |
if (msgb->debug) {
|
| 419 |
fprintf(stdout, |
| 420 |
"RTP_BUFFER (%s): DATA READY\n", msgb->buf_id);
|
| 421 |
} |
| 422 |
|
| 423 |
return MSG_BUFFER_DATA_READY;
|
| 424 |
} |
| 425 |
|
| 426 |
if (msgb->slow_mode == MSG_BUFFER_SLOW_MODE_TH2) {
|
| 427 |
if ((tv_diff.tv_usec + 1000000 * tv_diff.tv_sec) >= |
| 428 |
msgb->th2_to) {
|
| 429 |
if (tv) {
|
| 430 |
tv->tv_sec = 0;
|
| 431 |
tv->tv_usec = msgb->min_to_us; |
| 432 |
} |
| 433 |
|
| 434 |
if (msgb->debug) {
|
| 435 |
fprintf(stdout, "RTP_BUFFER (%s): "
|
| 436 |
"DATA READY TIMEOUT TH2\n",
|
| 437 |
msgb->buf_id); |
| 438 |
} |
| 439 |
|
| 440 |
return MSG_BUFFER_DATA_READY;
|
| 441 |
} |
| 442 |
|
| 443 |
if (tv) {
|
| 444 |
to = msgb->th2_to - (tv->tv_usec + 1000000 * tv->tv_sec);
|
| 445 |
tv->tv_sec = to / 1000000;
|
| 446 |
tv->tv_usec = to % 1000000;
|
| 447 |
} |
| 448 |
} |
| 449 |
|
| 450 |
if (msgb->slow_mode == MSG_BUFFER_SLOW_MODE_TH1) {
|
| 451 |
if ((tv_diff.tv_usec + 1000000 * tv_diff.tv_sec) >= |
| 452 |
msgb->th1_to) {
|
| 453 |
if (tv) {
|
| 454 |
tv->tv_sec = 0;
|
| 455 |
tv->tv_usec = msgb->min_to_us; |
| 456 |
} |
| 457 |
|
| 458 |
if (msgb->debug) {
|
| 459 |
fprintf(stdout, "RTP_BUFFER (%s): "
|
| 460 |
"DATA READY TIMEOUT TH1\n",
|
| 461 |
msgb->buf_id); |
| 462 |
} |
| 463 |
|
| 464 |
return MSG_BUFFER_DATA_READY;
|
| 465 |
} |
| 466 |
|
| 467 |
if (tv) {
|
| 468 |
to = msgb->th1_to - |
| 469 |
(tv->tv_usec + 1000000 * tv->tv_sec);
|
| 470 |
tv->tv_sec = to / 1000000;
|
| 471 |
tv->tv_usec = to % 1000000;
|
| 472 |
} |
| 473 |
} |
| 474 |
|
| 475 |
if (msgb->debug) {
|
| 476 |
fprintf(stdout, "RTP_BUFFER (%s): DATA NOT READY\n",
|
| 477 |
msgb->buf_id); |
| 478 |
} |
| 479 |
|
| 480 |
return MSG_BUFFER_DATA_NOT_READY;
|
| 481 |
} |
| 482 |
|
| 483 |
int msg_buffer_parse_start(struct msg_buffer *msgb) |
| 484 |
{
|
| 485 |
if (msgb->next_slot_pop == MSG_BUFFER_INVALID_SLOT_IDX) {
|
| 486 |
if (msgb->debug) {
|
| 487 |
fprintf(stderr, |
| 488 |
"RTP_BUFFER (%s): msg_buffer_parse_start() "
|
| 489 |
"failed (buffer empty)\n",
|
| 490 |
msgb->buf_id); |
| 491 |
} |
| 492 |
return -1; |
| 493 |
} |
| 494 |
|
| 495 |
msgb->next_slot_parse = msgb->next_slot_pop; |
| 496 |
|
| 497 |
return 0; |
| 498 |
} |
| 499 |
|
| 500 |
int msg_buffer_parse_next(struct msg_buffer *msgb, uint8_t **buf) |
| 501 |
{
|
| 502 |
int size = 0; |
| 503 |
|
| 504 |
if (msgb->next_slot_pop == MSG_BUFFER_INVALID_SLOT_IDX ||
|
| 505 |
msgb->next_slot_parse == MSG_BUFFER_INVALID_SLOT_IDX) {
|
| 506 |
*buf = NULL;
|
| 507 |
return size;
|
| 508 |
} |
| 509 |
|
| 510 |
*buf = (msgb->slots + msgb->next_slot_parse)->buf; |
| 511 |
size = (msgb->slots + msgb->next_slot_parse)->size; |
| 512 |
|
| 513 |
if (msgb->debug) {
|
| 514 |
fprintf(stdout, "RTP_BUFFER (%s): parsed %d bytes in slot %d\n",
|
| 515 |
msgb->buf_id, size, msgb->next_slot_parse); |
| 516 |
} |
| 517 |
|
| 518 |
msgb->next_slot_parse = (msgb->next_slot_parse + 1) % msgb->nslots;
|
| 519 |
|
| 520 |
if (msgb->next_slot_parse == msgb->next_slot_push) {
|
| 521 |
msgb->next_slot_parse = MSG_BUFFER_INVALID_SLOT_IDX; |
| 522 |
} |
| 523 |
|
| 524 |
return size;
|
| 525 |
|
| 526 |
} |
| 527 |
|
| 528 |
void msg_buffer_parse_stop(struct msg_buffer *msgb) |
| 529 |
{
|
| 530 |
msgb->next_slot_parse = MSG_BUFFER_INVALID_SLOT_IDX; |
| 531 |
} |
| 532 |
|
| 533 |
uint32_t msg_buffer_get_start_buf_size(struct msg_buffer *msgb)
|
| 534 |
{
|
| 535 |
if (!msgb) {
|
| 536 |
return 0; |
| 537 |
} |
| 538 |
|
| 539 |
return msgb->start_buf_size_th;
|
| 540 |
} |
| 541 |
|
| 542 |
uint32_t msg_buffer_get_current_size(struct msg_buffer *msgb)
|
| 543 |
{
|
| 544 |
if (!msgb) {
|
| 545 |
return 0; |
| 546 |
} |
| 547 |
|
| 548 |
return msgb->size;
|
| 549 |
} |
| 550 |
|
| 551 |
void msg_buffer_set_ths_to(struct msg_buffer *msgb, |
| 552 |
uint32_t th1_to_us, |
| 553 |
uint32_t th2_to_us) |
| 554 |
{
|
| 555 |
if (msgb) {
|
| 556 |
msgb->th1_to = th1_to_us; |
| 557 |
msgb->th2_to = th2_to_us; |
| 558 |
} |
| 559 |
} |
| 560 |
|
| 561 |
void msg_buffer_set_ths_size(struct msg_buffer *msgb, |
| 562 |
uint32_t th1_size, |
| 563 |
uint32_t th2_size) |
| 564 |
{
|
| 565 |
if (msgb) {
|
| 566 |
msgb->th1_size = th1_size; |
| 567 |
msgb->th2_size = th2_size; |
| 568 |
} |
| 569 |
} |
| 570 |
|
| 571 |
void msg_buffer_set_initial_buffering_to_us(struct msg_buffer *msgb, |
| 572 |
uint32_t to_us) |
| 573 |
{
|
| 574 |
if (msgb) {
|
| 575 |
msgb->start_buf_to_us = to_us; |
| 576 |
msgb->buffer_started = 0;
|
| 577 |
} |
| 578 |
} |
| 579 |
|
| 580 |
void msg_buffer_set_start_buf_size_th(struct msg_buffer *msgb, |
| 581 |
uint32_t size_th) |
| 582 |
{
|
| 583 |
if (msgb) {
|
| 584 |
msgb->start_buf_size_th = size_th; |
| 585 |
} |
| 586 |
} |
| 587 |
|
| 588 |
void msg_buffer_set_flush_to_us(struct msg_buffer *msgb, uint32_t to_us) |
| 589 |
{
|
| 590 |
if (msgb) {
|
| 591 |
msgb->flush_to_us = to_us; |
| 592 |
} |
| 593 |
} |
| 594 |
|
| 595 |
void msg_buffer_start_buf_reinit(struct msg_buffer *msgb, uint32_t to_us) |
| 596 |
{
|
| 597 |
if (msgb) {
|
| 598 |
msgb->flushing = 0;
|
| 599 |
msgb->start_buf_complete = 0;
|
| 600 |
msgb->buffer_started = 1;
|
| 601 |
msgb->start_buf_to_us = to_us; |
| 602 |
gettimeofday(&(msgb->buffer_started_tv), NULL);
|
| 603 |
} |
| 604 |
} |
| 605 |
|
| 606 |
int msg_buffer_is_flushing(struct msg_buffer *msgb) |
| 607 |
{
|
| 608 |
if (msgb) {
|
| 609 |
if (msgb->flushing) {
|
| 610 |
return 1; |
| 611 |
} |
| 612 |
} |
| 613 |
|
| 614 |
return 0; |
| 615 |
} |
| 616 |
|
| 617 |
uint32_t msg_buffer_get_nslots(struct msg_buffer *msgb)
|
| 618 |
{
|
| 619 |
if (msgb) {
|
| 620 |
return msgb->nslots;
|
| 621 |
} |
| 622 |
} |