kenmirrors/freeswitch
1
0
Fork 0
mirror of https://github.com/signalwire/freeswitch.git synced 2025-08-13 17:38:59 +00:00
Code Issues Projects Releases Wiki Activity

FS-4527 --resolve add resample core support for asr. This code is very isolated and only effects mod_unimrcp at this time.

Browse Source
This commit is contained in:
Jeff Lenk
2012-10-10 14:20:07 -05:00
parent 1aea82488b
commit 9bbee350c2
3 changed files with 53 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/switch_core_asr.c
View File

@@ -77,6 +77,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_asr_open(switch_asr_handle_t *ah,
}
ah->rate = rate;
ah->name = switch_core_strdup(ah->memory_pool, module_name);
ah->samplerate = rate;
ah->native_rate = rate;
status = ah->asr_interface->asr_open(ah, codec, rate, dest, flags);
@@ -223,6 +225,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_asr_close(switch_asr_handle_t *ah, s
status = ah->asr_interface->asr_close(ah, flags);
switch_set_flag(ah, SWITCH_ASR_FLAG_CLOSED);
switch_resample_destroy(&ah->resampler);
UNPROTECT_INTERFACE(ah->asr_interface);
if (switch_test_flag(ah, SWITCH_ASR_FLAG_FREE_POOL)) {
@@ -234,8 +238,37 @@ SWITCH_DECLARE(switch_status_t) switch_core_asr_close(switch_asr_handle_t *ah, s
SWITCH_DECLARE(switch_status_t) switch_core_asr_feed(switch_asr_handle_t *ah, void *data, unsigned int len, switch_asr_flag_t *flags)
{
switch_size_t orig_len = len;
switch_assert(ah != NULL);
if (ah->native_rate && ah->samplerate && ah->native_rate != ah->samplerate) {
if (!ah->resampler) {
if (switch_resample_create(&ah->resampler,
ah->samplerate, ah->native_rate, (uint32_t) orig_len, SWITCH_RESAMPLE_QUALITY, 1) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Unable to create resampler!\n");
return SWITCH_STATUS_GENERR;
}
}
switch_resample_process(ah->resampler, data, len / 2);
if (ah->resampler->to_len > orig_len) {
if (!ah->dbuf) {
void *mem;
ah->dbuflen = ah->resampler->to_len * 2;
mem = realloc(ah->dbuf, ah->dbuflen);
switch_assert(mem);
ah->dbuf = mem;
}
switch_assert(ah->resampler->to_len * 2 <= ah->dbuflen);
memcpy(ah->dbuf, ah->resampler->to, ah->resampler->to_len * 2);
data = ah->dbuf;
} else {
memcpy(data, ah->resampler->to, ah->resampler->to_len * 2);
}
len = ah->resampler->to_len;
}
return ah->asr_interface->asr_feed(ah, data, len, flags);
}