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add buffering to local_stream 

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6768 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale 2007-12-13 20:12:42 +00:00
parent 04faa8a80c
commit 4e1948c440
1 changed files with 42 additions and 13 deletions
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55
src/mod/formats/mod_local_stream/mod_local_stream.c
View File

@ -31,7 +31,7 @@
*/
#include <switch.h>
/* for apr_pstrcat */
#define DEFAULT_PREBUFFER_SIZE 1024 * 64
SWITCH_MODULE_LOAD_FUNCTION(mod_local_stream_load);
SWITCH_MODULE_DEFINITION(mod_local_stream, mod_local_stream_load, NULL, NULL);
@ -66,6 +66,7 @@ struct local_stream_source {
uint32_t prebuf;
char *timer_name;
local_stream_context_t *context_list;
int total;
switch_dir_t *dir_handle;
switch_mutex_t *mutex;
switch_memory_pool_t *pool;
@ -80,13 +81,22 @@ static void *SWITCH_THREAD_FUNC read_stream_thread(switch_thread_t *thread, void
char file_buf[128] = "", path_buf[512] = "";
switch_timer_t timer = {0};
int fd = -1;
switch_buffer_t *audio_buffer;
switch_byte_t *dist_buf;
switch_size_t used;
if (switch_core_timer_init(&timer, source->timer_name, source->interval, source->samples, source->pool) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CONSOLE, "Can't start timer.\n");
return NULL;
}
if (!source->prebuf) {
source->prebuf = DEFAULT_PREBUFFER_SIZE;
}
switch_buffer_create_dynamic(&audio_buffer, 1024, source->prebuf + 10, 0);
dist_buf = switch_core_alloc(source->pool, source->prebuf + 10);
while(RUNNING) {
const char *fname;
@ -155,13 +165,27 @@ static void *SWITCH_THREAD_FUNC read_stream_thread(switch_thread_t *thread, void
break;
}
switch_mutex_lock(source->mutex);
for (cp = source->context_list; cp; cp = cp->next) {
switch_mutex_lock(cp->audio_mutex);
switch_buffer_write(cp->audio_buffer, abuf, olen * 2);
switch_mutex_unlock(cp->audio_mutex);
switch_buffer_write(audio_buffer, abuf, olen * 2);
used = switch_buffer_inuse(audio_buffer);
if (!source->total) {
if (used >= source->prebuf) {
switch_buffer_read(audio_buffer, abuf, olen * 2);
}
} else {
int dist_len = ((source->prebuf * 95) / 100);
if (used >= dist_len) {
switch_buffer_read(audio_buffer, dist_buf, used);
switch_mutex_lock(source->mutex);
for (cp = source->context_list; cp; cp = cp->next) {
switch_mutex_lock(cp->audio_mutex);
switch_buffer_write(cp->audio_buffer, dist_buf, used);
switch_mutex_unlock(cp->audio_mutex);
}
switch_mutex_unlock(source->mutex);
}
}
switch_mutex_unlock(source->mutex);
}
}
@ -238,6 +262,7 @@ static switch_status_t local_stream_file_open(switch_file_handle_t *handle, cons
switch_mutex_lock(source->mutex);
context->next = source->context_list;
source->context_list = context;
source->total++;
switch_mutex_unlock(source->mutex);
end:
@ -261,6 +286,7 @@ static switch_status_t local_stream_file_close(switch_file_handle_t *handle)
}
last = cp;
}
context->source->total--;
switch_mutex_unlock(context->source->mutex);
switch_buffer_destroy(&context->audio_buffer);
@ -278,17 +304,20 @@ static switch_status_t local_stream_file_read(switch_file_handle_t *handle, void
switch_size_t bytes = 0;
size_t need = *len * 2;
switch_mutex_lock(context->audio_mutex);
if ((bytes = switch_buffer_read(context->audio_buffer, data, need))) {
*len = bytes / 2;
} else {
if (need > 2560) {
need = 2560;
if (need > context->source->samples * 2) {
need = context->source->samples * 2;
}
memset(data, 255, need);
*len = need / 2;
memset(data, 0, need);
*len = need / 2;
}
switch_mutex_unlock(context->audio_mutex);
handle->sample_count += *len;
return SWITCH_STATUS_SUCCESS;
}
@ -351,7 +380,7 @@ static void launch_threads(void)
source->interval = 20;
source->channels = 1;
source->timer_name = "soft";
source->prebuf = DEFAULT_PREBUFFER_SIZE;
for (param = switch_xml_child(directory, "param"); param; param = param->next) {
char *var = (char *) switch_xml_attr_soft(param, "name");