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translate: Fix transcoding while different in frame size.

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When Asterisk translates between codecs, each with a different frame size (for
example between iLBC 30 and Speex-WB), too large frames were created by
ast_trans_frameout. Now, ast_trans_frameout is called with the correct frame
length, creating several frames when necessary. Affects all transcoding modules
which used ast_trans_frameout: GSM, iLBC, LPC10, and Speex.

ASTERISK-25353 #close

Change-Id: I2e229569d73191d66a4e43fef35432db24000212
This commit is contained in:
Alexander Traud
2015-08-28 22:42:23 +02:00
parent 229b95d253
commit 077adf48b8
5 changed files with 139 additions and 72 deletions
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28
codecs/codec_ilbc.c
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@@ -37,6 +37,7 @@ ASTERISK_REGISTER_FILE()
#include "asterisk/translate.h"
#include "asterisk/module.h"
#include "asterisk/utils.h"
#include "asterisk/linkedlists.h"
#ifdef ILBC_WEBRTC
#include <ilbc.h>
@@ -150,31 +151,40 @@ static int lintoilbc_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
static struct ast_frame *lintoilbc_frameout(struct ast_trans_pvt *pvt)
{
struct ilbc_coder_pvt *tmp = pvt->pvt;
int datalen = 0;
int samples = 0;
struct ast_frame *result = NULL;
struct ast_frame *last = NULL;
int samples = 0; /* output samples */
/* We can't work on anything less than a frame in size */
if (pvt->samples < ILBC_SAMPLES)
return NULL;
while (pvt->samples >= ILBC_SAMPLES) {
struct ast_frame *current;
ilbc_block tmpf[ILBC_SAMPLES];
int i;
/* Encode a frame of data */
for (i = 0 ; i < ILBC_SAMPLES ; i++)
tmpf[i] = tmp->buf[samples + i];
iLBC_encode( (ilbc_bytes*)pvt->outbuf.BUF_TYPE + datalen, tmpf, &tmp->enc);
iLBC_encode((ilbc_bytes *) pvt->outbuf.BUF_TYPE, tmpf, &tmp->enc);
datalen += ILBC_FRAME_LEN;
samples += ILBC_SAMPLES;
pvt->samples -= ILBC_SAMPLES;
current = ast_trans_frameout(pvt, ILBC_FRAME_LEN, ILBC_SAMPLES);
if (!current) {
continue;
} else if (last) {
AST_LIST_NEXT(last, frame_list) = current;
} else {
result = current;
}
last = current;
}
/* Move the data at the end of the buffer to the front */
if (pvt->samples)
if (samples) {
memmove(tmp->buf, tmp->buf + samples, pvt->samples * 2);
}
return ast_trans_frameout(pvt, datalen, samples);
return result;
}
static struct ast_translator ilbctolin = {