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freeswitch/libs/stfu/stfu.c

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/*
* STFU (S)ort (T)ransportable (F)ramed (U)tterances
* Copyright (c) 2007-2014 Anthony Minessale II <anthm@freeswitch.org>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* THOSE WHO DISAGREE MAY CERTAINLY STFU
*/
#include "stfu.h"
//#define DB_JB 1
#ifndef UINT_MAX
# define UINT_MAX 4294967295U
#endif
#ifndef UINT16_MAX
# define UINT16_MAX 65535
#endif
#ifdef _MSC_VER
/* warning C4706: assignment within conditional expression*/
#pragma warning(disable: 4706)
/* warning C4996: 'strdup': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strdup. See online help for details. */
#pragma warning(disable:4996)
#endif
#define least1(_z) (_z ? _z : 1)
static int stfu_log_level = 7;
struct stfu_queue {
struct stfu_frame *array;
struct stfu_frame int_frame;
uint32_t real_array_size;
uint32_t array_size;
uint32_t array_len;
uint32_t wr_len;
uint32_t last_index;
int32_t last_jitter;
};
typedef struct stfu_queue stfu_queue_t;
struct stfu_instance {
struct stfu_queue a_queue;
struct stfu_queue b_queue;
struct stfu_queue c_queue;
struct stfu_queue *in_queue;
struct stfu_queue *out_queue;
struct stfu_queue *old_queue;
struct stfu_frame *last_frame;
uint32_t cur_ts;
uint16_t cur_seq;
uint32_t last_wr_ts;
uint32_t last_rd_ts;
uint32_t samples_per_packet;
uint32_t samples_per_second;
uint32_t miss_count;
uint32_t max_plc;
uint32_t qlen;
uint32_t most_qlen;
uint32_t max_qlen;
uint32_t orig_qlen;
uint32_t packet_count;
uint32_t consecutive_good_count;
uint32_t consecutive_bad_count;
uint32_t period_good_count;
uint32_t period_bad_count;
uint32_t period_packet_in_count;
uint32_t period_packet_out_count;
uint32_t period_missing_count;
uint32_t period_need_range;
uint32_t period_need_range_avg;
uint32_t period_clean_count;
uint32_t session_clean_count;
uint32_t session_missing_count;
uint32_t session_packet_in_count;
uint32_t session_packet_out_count;
uint32_t sync_out;
uint32_t sync_in;
int32_t ts_offset;
int32_t ts_drift;
int32_t max_drift;
uint32_t drift_dropped_packets;
uint32_t drift_max_dropped;
int32_t ts_diff;
int32_t last_ts_diff;
int32_t same_ts;
uint32_t period_time;
uint32_t decrement_time;
uint32_t plc_len;
uint32_t plc_pt;
uint32_t diff;
uint32_t diff_total;
uint8_t ready;
uint8_t debug;
char *name;
stfu_n_call_me_t callback;
void *udata;
};
static void stfu_n_reset_counters(stfu_instance_t *i);
static void null_logger(const char *file, const char *func, int line, int level, const char *fmt, ...);
static void default_logger(const char *file, const char *func, int line, int level, const char *fmt, ...);
stfu_logger_t stfu_log = null_logger;
int32_t stfu_n_get_drift(stfu_instance_t *i)
{
return i->ts_drift;
}
int32_t stfu_n_get_most_qlen(stfu_instance_t *i)
{
return i->most_qlen;
}
void stfu_global_set_logger(stfu_logger_t logger)
{
if (logger) {
stfu_log = logger;
} else {
stfu_log = null_logger;
}
}
void stfu_global_set_default_logger(int level)
{
if (level < 0 || level > 7) {
level = 7;
}
stfu_log = default_logger;
stfu_log_level = level;
}
static stfu_status_t stfu_n_resize_aqueue(stfu_queue_t *queue, uint32_t qlen)
{
unsigned char *m;
if (qlen <= queue->real_array_size) {
queue->array_size = qlen;
if (queue->array_len > qlen) {
queue->array_len = qlen;
}
} else {
m = realloc(queue->array, qlen * sizeof(struct stfu_frame));
assert(m);
memset(m + queue->array_size * sizeof(struct stfu_frame), 0, (qlen * sizeof(struct stfu_frame)) - (queue->array_size * sizeof(struct stfu_frame)));
queue->array = (struct stfu_frame *) m;
queue->real_array_size = queue->array_size = qlen;
}
return STFU_IT_WORKED;
}
static void stfu_n_init_aqueue(stfu_queue_t *queue, uint32_t qlen)
{
queue->array = calloc(qlen, sizeof(struct stfu_frame));
assert(queue->array != NULL);
memset(queue->array, 0, sizeof(struct stfu_frame) * qlen);
queue->real_array_size = queue->array_size = qlen;
queue->int_frame.plc = 1;
memset(queue->int_frame.data, 255, sizeof(queue->int_frame.data));
}
void stfu_n_call_me(stfu_instance_t *i, stfu_n_call_me_t callback, void *udata)
{
i->callback = callback;
i->udata = udata;
}
void stfu_n_destroy(stfu_instance_t **i)
{
stfu_instance_t *ii;
if (i && *i) {
ii = *i;
*i = NULL;
if (ii->name) free(ii->name);
free(ii->a_queue.array);
free(ii->b_queue.array);
free(ii->c_queue.array);
free(ii);
}
}
void stfu_n_debug(stfu_instance_t *i, const char *name)
{
if (i->name) free(i->name);
if (name) {
i->name = strdup(name);
i->debug = 1;
} else {
i->name = strdup("none");
i->debug = 0;
}
}
void stfu_n_report(stfu_instance_t *i, stfu_report_t *r)
{
stfu_assert(i);
r->qlen = i->qlen;
r->packet_in_count = i->period_packet_in_count;
r->clean_count = i->period_clean_count;
r->consecutive_good_count = i->consecutive_good_count;
r->consecutive_bad_count = i->consecutive_bad_count;
}
stfu_status_t stfu_n_resize(stfu_instance_t *i, uint32_t qlen)
{
stfu_status_t s;
if (i->qlen == i->max_qlen) {
return STFU_IT_FAILED;
}
if (i->max_qlen && qlen > i->max_qlen) {
if (i->qlen < i->max_qlen) {
qlen = i->max_qlen;
} else {
return STFU_IT_FAILED;
}
}
if ((s = stfu_n_resize_aqueue(&i->a_queue, qlen)) == STFU_IT_WORKED) {
s = stfu_n_resize_aqueue(&i->b_queue, qlen);
s = stfu_n_resize_aqueue(&i->c_queue, qlen);
if (qlen > i->most_qlen) {
i->most_qlen = qlen;
}
i->qlen = qlen;
i->max_plc = 5;
i->last_frame = NULL;
}
return s;
}
stfu_instance_t *stfu_n_init(uint32_t qlen, uint32_t max_qlen, uint32_t samples_per_packet, uint32_t samples_per_second, uint32_t max_drift_ms)
{
struct stfu_instance *i;
i = malloc(sizeof(*i));
if (!i) {
return NULL;
}
memset(i, 0, sizeof(*i));
i->qlen = qlen;
i->max_qlen = max_qlen;
i->orig_qlen = qlen;
i->samples_per_packet = samples_per_packet;
stfu_n_init_aqueue(&i->a_queue, qlen);
stfu_n_init_aqueue(&i->b_queue, qlen);
stfu_n_init_aqueue(&i->c_queue, qlen);
i->max_drift = (int32_t)(max_drift_ms * (samples_per_second / 1000) * -1);
if (max_drift_ms && samples_per_packet) {
i->drift_max_dropped = (samples_per_second * 2) / samples_per_packet;
}
i->in_queue = &i->a_queue;
i->out_queue = &i->b_queue;
i->old_queue = &i->c_queue;
i->name = strdup("none");
i->max_plc = i->qlen / 2;
i->samples_per_second = samples_per_second ? samples_per_second : 8000;
i->period_time = ((i->samples_per_second * 20) / i->samples_per_packet);
i->decrement_time = ((i->samples_per_second * 15) / i->samples_per_packet);
return i;
}
static void stfu_n_reset_counters(stfu_instance_t *i)
{
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s COUNTER RESET........\n", i->name);
}
if (i->callback) {
i->callback(i, i->udata);
}
i->consecutive_good_count = 0;
i->consecutive_bad_count = 0;
i->period_good_count = 0;
i->period_clean_count = 0;
i->period_bad_count = 0;
i->period_packet_in_count = 0;
i->period_packet_out_count = 0;
i->period_missing_count = 0;
i->period_need_range = 0;
i->period_need_range_avg = 0;
i->diff = 0;
i->diff_total = 0;
}
void stfu_n_reset(stfu_instance_t *i)
{
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s RESET\n", i->name);
}
i->ready = 0;
i->in_queue = &i->a_queue;
i->out_queue = &i->b_queue;
i->old_queue = &i->c_queue;
i->in_queue->array_len = 0;
i->out_queue->array_len = 0;
i->out_queue->wr_len = 0;
i->last_frame = NULL;
i->in_queue->last_jitter = 0;
i->out_queue->last_jitter = 0;
stfu_n_reset_counters(i);
stfu_n_sync(i, 1);
i->cur_ts = 0;
i->cur_seq = 0;
i->last_wr_ts = 0;
i->last_rd_ts = 0;
i->miss_count = 0;
i->packet_count = 0;
i->ts_offset = 0;
}
stfu_status_t stfu_n_sync(stfu_instance_t *i, uint32_t packets)
{
if (packets > i->qlen) {
stfu_n_reset(i);
} else {
i->sync_out = packets;
i->sync_in = packets;
}
return STFU_IT_WORKED;
}
static void stfu_n_swap(stfu_instance_t *i)
{
stfu_queue_t *last_in = i->in_queue, *last_out = i->out_queue, *last_old = i->old_queue;
i->ready = 1;
i->in_queue = last_old;
i->out_queue = last_in;
i->old_queue = last_out;
i->in_queue->array_len = 0;
i->out_queue->wr_len = 0;
i->last_frame = NULL;
i->miss_count = 0;
i->in_queue->last_index = 0;
i->out_queue->last_index = 0;
i->out_queue->last_jitter = 0;
}
stfu_status_t stfu_n_add_data(stfu_instance_t *i, uint32_t ts, uint16_t seq, uint32_t pt, void *data, size_t datalen, uint32_t timer_ts, int last)
{
uint32_t index = 0;
stfu_frame_t *frame;
size_t cplen = 0;
int good_ts = 0;
if (!i->samples_per_packet && ts && i->last_rd_ts) {
i->ts_diff = ts - i->last_rd_ts;
if (i->last_ts_diff == i->ts_diff) {
if (++i->same_ts == 5) {
i->samples_per_packet = i->ts_diff;
if (i->max_drift && i->samples_per_packet) {
i->drift_max_dropped = (i->samples_per_second * 2) / i->samples_per_packet;
}
}
} else {
i->same_ts = 0;
}
i->last_ts_diff = i->ts_diff;
if (!i->samples_per_packet) {
i->last_rd_ts = ts;
return STFU_IT_FAILED;
}
}
if (timer_ts) {
if (ts && !i->ts_offset) {
i->ts_offset = timer_ts - ts;
}
i->ts_drift = ts + (i->ts_offset - timer_ts);
if (i->ts_offset && i->ts_drift > 0) {
i->ts_offset = timer_ts - ts;
i->ts_drift = ts + (i->ts_offset - timer_ts);
}
if (i->max_drift) {
if (i->drift_dropped_packets > 500) {
stfu_n_reset(i);
}
if (i->ts_drift < i->max_drift) {
if (++i->drift_dropped_packets < i->drift_max_dropped) {
stfu_log(STFU_LOG_EMERG, "%s TOO LATE !!! %u \n\n\n", i->name, ts);
return STFU_ITS_TOO_LATE;
}
} else {
i->drift_dropped_packets = 0;
}
}
}
if (i->sync_in) {
good_ts = 1;
i->sync_in = 0;
} else {
if ((ts && ts == i->last_rd_ts + i->samples_per_packet) || (i->last_rd_ts > 4294900000u && ts < 5000)) {
good_ts = 1;
}
if (i->last_wr_ts) {
if ((ts <= i->last_wr_ts && (i->last_wr_ts != UINT_MAX || ts == i->last_wr_ts))) {
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s TOO LATE !!! %u \n\n\n", i->name, ts);
}
if (i->in_queue->array_len < i->in_queue->array_size) {
i->in_queue->array_len++;
}
return STFU_ITS_TOO_LATE;
}
}
}
if (good_ts) {
i->period_clean_count++;
i->session_clean_count++;
}
i->period_packet_in_count++;
i->session_packet_in_count++;
i->period_need_range_avg = i->period_need_range / least1(i->period_missing_count);
if (i->period_missing_count > i->qlen * 2) {
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s resize %u %u\n", i->name, i->qlen, i->qlen + 1);
}
stfu_n_resize(i, i->qlen + 1);
stfu_n_reset_counters(i);
} else {
if (i->qlen > i->orig_qlen && (i->consecutive_good_count > i->decrement_time || i->period_clean_count > i->decrement_time)) {
stfu_n_resize(i, i->qlen - 1);
stfu_n_reset_counters(i);
stfu_n_sync(i, i->qlen);
}
}
i->diff = 0;
if (i->last_wr_ts) {
if (ts < 1000 && i->last_wr_ts > (UINT_MAX - 1000)) {
i->diff = abs(((UINT_MAX - i->last_wr_ts) + ts) / i->samples_per_packet);
} else if (ts) {
i->diff = abs(i->last_wr_ts - ts) / i->samples_per_packet;
}
}
i->diff_total += i->diff;
if ((i->period_packet_in_count > i->period_time)) {
//uint32_t avg;
//avg = i->diff_total / least1(i->period_packet_in_count);
i->period_packet_in_count = 0;
if (i->period_missing_count == 0 && i->qlen > i->orig_qlen) {
stfu_n_resize(i, i->qlen - 1);
stfu_n_sync(i, i->qlen);
}
stfu_n_reset_counters(i);
}
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "I: %s %u/%u i=%u/%u - g:%u/%u c:%u/%u b:%u - %u:%u - %u %d %u %u %d %d %d/%d\n", i->name,
i->qlen, i->max_qlen, i->period_packet_in_count, i->period_time, i->consecutive_good_count,
i->decrement_time, i->period_clean_count, i->decrement_time, i->consecutive_bad_count,
ts, ts / i->samples_per_packet,
i->period_missing_count, i->period_need_range_avg,
i->last_wr_ts, ts, i->diff, i->diff_total / least1(i->period_packet_in_count), i->ts_drift, i->max_drift);
}
if (last || i->in_queue->array_len == i->in_queue->array_size) {
stfu_n_swap(i);
}
if (last) {
return STFU_IM_DONE;
}
index = i->in_queue->array_len++;
assert(index < i->in_queue->array_size);
frame = &i->in_queue->array[index];
if (i->in_queue->array_len == i->in_queue->array_size) {
stfu_n_swap(i);
}
if ((cplen = datalen) > sizeof(frame->data)) {
cplen = sizeof(frame->data);
}
i->last_rd_ts = ts;
i->packet_count++;
memcpy(frame->data, data, cplen);
frame->pt = pt;
frame->ts = ts;
frame->seq = seq;
frame->dlen = cplen;
frame->was_read = 0;
return STFU_IT_WORKED;
}
static int stfu_n_find_any_frame(stfu_instance_t *in, stfu_queue_t *queue, stfu_frame_t **r_frame)
{
uint32_t i = 0;
stfu_frame_t *frame = NULL;
stfu_assert(r_frame);
*r_frame = NULL;
for(i = 0; i < queue->real_array_size; i++) {
frame = &queue->array[i];
if (!frame->was_read) {
*r_frame = frame;
queue->last_index = i;
frame->was_read = 1;
in->period_packet_out_count++;
in->session_packet_out_count++;
return 1;
}
}
return 0;
}
static int stfu_n_find_frame(stfu_instance_t *in, stfu_queue_t *queue, uint32_t min_ts, uint32_t max_ts, stfu_frame_t **r_frame)
{
uint32_t i = 0;
stfu_frame_t *frame = NULL;
if (r_frame) {
*r_frame = NULL;
}
for(i = 0; i < queue->array_size; i++) {
frame = &queue->array[i];
if (frame->ts == max_ts || (frame->ts > min_ts && frame->ts < max_ts)) {
if (r_frame) {
*r_frame = frame;
queue->last_index = i;
frame->was_read = 1;
in->period_packet_out_count++;
in->session_packet_out_count++;
}
return 1;
}
}
return 0;
}
stfu_frame_t *stfu_n_read_a_frame(stfu_instance_t *i)
{
stfu_frame_t *rframe = NULL;
int found = 0;
if (!i->samples_per_packet) {
return NULL;
}
if (!i->ready) {
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s JITTERBUFFER NOT READY: IGNORING FRAME\n", i->name);
}
return NULL;
}
if (i->cur_ts == 0 && i->last_wr_ts < 1000) {
uint32_t x = 0;
for (x = 0; x < i->out_queue->array_len; x++) {
if (!i->out_queue->array[x].was_read) {
i->cur_ts = i->out_queue->array[x].ts;
i->cur_seq = i->out_queue->array[x].seq;
break;
}
if (i->cur_ts == 0) {
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s JITTERBUFFER ERROR: PUNTING\n", i->name);
return NULL;
}
}
}
} else {
i->cur_ts = i->cur_ts + i->samples_per_packet;
i->cur_seq++;
}
found = stfu_n_find_frame(i, i->out_queue, i->last_wr_ts, i->cur_ts, &rframe);
if (found) {
if (i->out_queue->array_len) {
i->out_queue->array_len--;
}
} else {
found = stfu_n_find_frame(i, i->in_queue, i->last_wr_ts, i->cur_ts, &rframe);
if (!found) {
found = stfu_n_find_frame(i, i->old_queue, i->last_wr_ts, i->cur_ts, &rframe);
}
}
if (found) {
i->cur_ts = rframe->ts;
i->cur_seq = rframe->seq;
}
if (i->sync_out) {
if (!found) {
if ((found = stfu_n_find_any_frame(i, i->out_queue, &rframe))) {
i->cur_ts = rframe->ts;
i->cur_seq = rframe->seq;
}
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s SYNC %u %u:%u\n", i->name, i->sync_out, i->cur_ts, i->cur_ts / i->samples_per_packet);
}
}
i->sync_out = 0;
}
if (!i->cur_ts) {
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s NO TS\n", i->name);
}
return NULL;
}
if (!found && i->samples_per_packet) {
uint32_t y;
stfu_frame_t *frame = NULL;
int32_t delay = i->last_rd_ts - i->cur_ts;
uint32_t need = abs(i->last_rd_ts - i->cur_ts) / i->samples_per_packet;
i->period_missing_count++;
i->session_missing_count++;
i->period_need_range += need;
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s MISSING %u:%u %u %u %d %u %d\n", i->name,
i->cur_ts, i->cur_ts / i->samples_per_packet, i->packet_count, i->last_rd_ts, delay, i->qlen, need);
}
if (i->packet_count > i->orig_qlen * 100 && delay > 0 && need > i->qlen && need < (i->qlen + 5)) {
i->packet_count = 0;
}
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s ", i->name);
for(y = 0; y < i->out_queue->array_size; y++) {
if ((y % 5) == 0) stfu_log(STFU_LOG_EMERG, "\n%s ", i->name);
frame = &i->out_queue->array[y];
stfu_log(STFU_LOG_EMERG, "%u:%u\t", frame->ts, frame->ts / i->samples_per_packet);
}
stfu_log(STFU_LOG_EMERG, "\n%s ", i->name);
for(y = 0; y < i->in_queue->array_size; y++) {
if ((y % 5) == 0) stfu_log(STFU_LOG_EMERG, "\n%s ", i->name);
frame = &i->in_queue->array[y];
stfu_log(STFU_LOG_EMERG, "%u:%u\t", frame->ts, frame->ts / i->samples_per_packet);
}
stfu_log(STFU_LOG_EMERG, "\n%s\n\n\n", i->name);
}
if (delay < 0) {
stfu_n_reset(i);
return NULL;
}
}
if (stfu_log != null_logger && i->debug) {
if (found) {
stfu_log(STFU_LOG_EMERG, "%s O: %u:%u %u\n", i->name, rframe->ts, rframe->ts / i->samples_per_packet, rframe->plc);
}
}
if (found) {
i->consecutive_good_count++;
i->period_good_count++;
i->consecutive_bad_count = 0;
} else {
i->consecutive_bad_count++;
i->period_bad_count++;
i->consecutive_good_count = 0;
}
if (found) {
i->last_frame = rframe;
i->out_queue->wr_len++;
i->last_wr_ts = rframe->ts;
i->miss_count = 0;
if (rframe->dlen) {
i->plc_len = rframe->dlen;
}
i->plc_pt = rframe->pt;
} else {
i->last_wr_ts = i->cur_ts;
rframe = &i->out_queue->int_frame;
rframe->dlen = i->plc_len;
rframe->pt = i->plc_pt;
rframe->ts = i->cur_ts;
rframe->seq = i->cur_seq;
i->miss_count++;
if (stfu_log != null_logger && i->debug) {
stfu_log(STFU_LOG_EMERG, "%s PLC %d %d %ld %u:%u\n", i->name,
i->miss_count, rframe->plc, rframe->dlen, rframe->ts, rframe->ts / i->samples_per_packet);
}
if (i->miss_count > i->max_plc) {
stfu_n_reset(i);
rframe = NULL;
}
}
return rframe;
}
STFU_DECLARE(int32_t) stfu_n_copy_next_frame(stfu_instance_t *jb, uint32_t timestamp, uint16_t seq, uint16_t distance, stfu_frame_t *next_frame)
{
uint32_t i = 0, j = 0;
#ifdef WIN32
#pragma warning (disable:4204)
#endif
stfu_queue_t *queues[] = { jb->out_queue, jb->in_queue, jb->old_queue};
#ifdef WIN32
#pragma warning (default:4204)
#endif
stfu_queue_t *queue = NULL;
stfu_frame_t *frame = NULL;
uint32_t target_ts = 0;
#ifdef WIN32
UNREFERENCED_PARAMETER(seq);
#endif
if (!next_frame) return 0;
target_ts = timestamp + (distance - 1) * jb->samples_per_packet;
for (i = 0; i < sizeof(queues)/sizeof(queues[0]); i++) {
queue = queues[i];
if (!queue) continue;
for(j = 0; j < queue->array_size; j++) {
frame = &queue->array[j];
/* FIXME: ts rollover happened? bad luck */
if (frame->ts > target_ts) {
memcpy(next_frame, frame, sizeof(stfu_frame_t));
return 1;
}
}
}
return 0;
}
#ifdef WIN32
#ifndef vsnprintf
#define vsnprintf _vsnprintf
#endif
#endif
int vasprintf(char **ret, const char *format, va_list ap);
int stfu_vasprintf(char **ret, const char *fmt, va_list ap)
{
#if !defined(WIN32) && !defined(__sun)
return vasprintf(ret, fmt, ap);
#else
char *buf;
int len;
size_t buflen;
va_list ap2;
char *tmp = NULL;
#ifdef _MSC_VER
#if _MSC_VER >= 1500
/* hack for incorrect assumption in msvc header files for code analysis */
__analysis_assume(tmp);
#endif
ap2 = ap;
#else
va_copy(ap2, ap);
#endif
len = vsnprintf(tmp, 0, fmt, ap2);
if (len > 0 && (buf = malloc((buflen = (size_t) (len + 1)))) != NULL) {
len = vsnprintf(buf, buflen, fmt, ap);
*ret = buf;
} else {
*ret = NULL;
len = -1;
}
va_end(ap2);
return len;
#endif
}
int stfu_snprintf(char *buffer, size_t count, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vsnprintf(buffer, count-1, fmt, ap);
if (ret < 0)
buffer[count-1] = '\0';
va_end(ap);
return ret;
}
static void null_logger(const char *file, const char *func, int line, int level, const char *fmt, ...)
{
if (file && func && line && level && fmt) {
return;
}
return;
}
static const char *LEVEL_NAMES[] = {
"EMERG",
"ALERT",
"CRIT",
"ERROR",
"WARNING",
"NOTICE",
"INFO",
"DEBUG",
NULL
};
static const char *cut_path(const char *in)
{
const char *p, *ret = in;
char delims[] = "/\\";
char *i;
for (i = delims; *i; i++) {
p = in;
while ((p = strchr(p, *i)) != 0) {
ret = ++p;
}
}
return ret;
}
static void default_logger(const char *file, const char *func, int line, int level, const char *fmt, ...)
{
const char *fp;
char *data;
va_list ap;
int ret;
if (level < 0 || level > 7) {
level = 7;
}
if (level > stfu_log_level) {
return;
}
fp = cut_path(file);
va_start(ap, fmt);
ret = stfu_vasprintf(&data, fmt, ap);
if (ret != -1) {
fprintf(stderr, "[%s] %s:%d %s() %s", LEVEL_NAMES[level], fp, line, func, data);
free(data);
}
va_end(ap);
}
/* For Emacs:
* Local Variables:
* mode:c
* indent-tabs-mode:nil
* tab-width:4
* c-basic-offset:4
* End:
* For VIM:
* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
*/
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