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add resampler to speech handles

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git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12141 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale
2009-02-18 18:53:28 +00:00
parent 1b5656f3a8
commit da507c5f1e
7 changed files with 107 additions and 14 deletions
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src/switch_core_speech.c
+87 -3
View File
@@ -80,8 +80,14 @@ SWITCH_DECLARE(switch_status_t) switch_core_speech_open(switch_speech_handle_t *
sh->rate = rate;
sh->name = switch_core_strdup(pool, module_name);
sh->samples = switch_samples_per_packet(rate, interval);
sh->samplerate = rate;
sh->native_rate = rate;
return sh->speech_interface->speech_open(sh, voice_name, rate, flags);
if ((status = sh->speech_interface->speech_open(sh, voice_name, rate, flags)) == SWITCH_STATUS_SUCCESS) {
switch_set_flag(sh, SWITCH_SPEECH_FLAG_OPEN);
}
return status;
}
SWITCH_DECLARE(switch_status_t) switch_core_speech_feed_tts(switch_speech_handle_t *sh, char *text, switch_speech_flag_t *flags)
@@ -128,17 +134,93 @@ SWITCH_DECLARE(void) switch_core_speech_float_param_tts(switch_speech_handle_t *
}
SWITCH_DECLARE(switch_status_t) switch_core_speech_read_tts(switch_speech_handle_t *sh,
void *data, switch_size_t *datalen, uint32_t *rate, switch_speech_flag_t *flags)
void *data, switch_size_t *datalen, switch_speech_flag_t *flags)
{
switch_status_t status;
switch_size_t want, orig_len = *datalen;
switch_assert(sh != NULL);
want = *datalen;
top:
if (sh->buffer && (switch_buffer_inuse(sh->buffer) >= orig_len || switch_test_flag(sh, SWITCH_SPEECH_FLAG_DONE))) {
if ((*datalen = switch_buffer_read(sh->buffer, data, orig_len))) {
return SWITCH_STATUS_SUCCESS;
}
}
if (switch_test_flag(sh, SWITCH_SPEECH_FLAG_DONE)) {
switch_clear_flag(sh, SWITCH_SPEECH_FLAG_DONE);
*datalen = 0;
return SWITCH_STATUS_FALSE;
}
more:
if ((status = sh->speech_interface->speech_read_tts(sh, data, datalen, flags)) != SWITCH_STATUS_SUCCESS) {
switch_set_flag(sh, SWITCH_SPEECH_FLAG_DONE);
goto top;
}
if (sh->native_rate && sh->samplerate && sh->native_rate != sh->samplerate) {
if (!sh->resampler) {
if (switch_resample_create(&sh->resampler,
sh->native_rate, sh->samplerate, (uint32_t) orig_len, SWITCH_RESAMPLE_QUALITY) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Unable to create resampler!\n");
return SWITCH_STATUS_GENERR;
}
}
switch_resample_process(sh->resampler, data, *datalen / 2);
if (sh->resampler->to_len < want / 2 || sh->resampler->to_len > orig_len / 2) {
if (!sh->buffer) {
int factor = sh->resampler->to_len * sh->samplerate / 1000;
switch_buffer_create_dynamic(&sh->buffer, factor, factor, 0);
switch_assert(sh->buffer);
}
if (!sh->dbuf || sh->dbuflen < sh->resampler->to_len * 2) {
sh->dbuflen = sh->resampler->to_len * 2;
sh->dbuf = switch_core_alloc(sh->memory_pool, sh->dbuflen);
}
switch_assert(sh->resampler->to_len <= sh->dbuflen);
memcpy((int16_t *) sh->dbuf, sh->resampler->to, sh->resampler->to_len * 2);
switch_buffer_write(sh->buffer, sh->dbuf, sh->resampler->to_len * 2);
if (switch_buffer_inuse(sh->buffer) < want) {
*datalen = want;
goto more;
}
*datalen = switch_buffer_read(sh->buffer, data, orig_len);
status = SWITCH_STATUS_SUCCESS;
} else {
memcpy(data, sh->resampler->to, sh->resampler->to_len * 2);
*datalen = sh->resampler->to_len * 2;
status = SWITCH_STATUS_SUCCESS;
}
}
return status;
return sh->speech_interface->speech_read_tts(sh, data, datalen, rate, flags);
}
SWITCH_DECLARE(switch_status_t) switch_core_speech_close(switch_speech_handle_t *sh, switch_speech_flag_t *flags)
{
switch_status_t status = sh->speech_interface->speech_close(sh, flags);
if (!switch_test_flag(sh, SWITCH_SPEECH_FLAG_OPEN)) {
return SWITCH_STATUS_FALSE;
}
if (sh->buffer) {
switch_buffer_destroy(&sh->buffer);
}
switch_resample_destroy(&sh->resampler);
UNPROTECT_INTERFACE(sh->speech_interface);
@@ -146,6 +228,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_speech_close(switch_speech_handle_t
switch_core_destroy_memory_pool(&sh->memory_pool);
}
switch_clear_flag(sh, SWITCH_SPEECH_FLAG_OPEN);
return status;
}