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minor code optimizations to reduce the number of times that the ast_frame 

and ast_trans_pvt pointers have to be dereferenced (issue #7069, Mithraen)


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@25059 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
russell 2006-05-05 21:36:17 +00:00
parent be0d2ed294
commit f2fd8957f8
3 changed files with 38 additions and 28 deletions
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22
codecs/codec_a_mu.c
View File

@ -55,28 +55,30 @@ static unsigned char a2mu[256];
/*! \brief convert frame data and store into the buffer */
static int alawtoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
int x;
int i;
int in_samples = f->samples;
unsigned char *src = f->data;
unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples;
for ( x = 0 ; x < f->samples; x++)
dst[x] = a2mu[src[x]];
pvt->samples += f->samples;
pvt->datalen += f->datalen;
for (i = 0; i < in_samples; i++)
*dst++ = a2mu[*src++];
pvt->samples += in_samples;
pvt->datalen += in_samples;
return 0;
}
/*! \brief convert frame data and store into the buffer */
static int ulawtoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
int x;
int i;
int in_samples = f->samples;
unsigned char *src = f->data;
unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples;
for ( x = 0 ; x < f->samples; x++)
dst[x] = mu2a[src[x]];
pvt->samples += f->samples;
pvt->datalen += f->datalen;
for (i = 0; i < in_samples; i++)
*dst++ = mu2a[*src++];
pvt->samples += in_samples;
pvt->datalen += in_samples;
return 0;
}

22
codecs/codec_alaw.c
View File

@ -57,25 +57,29 @@ static int alawtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
int i;
unsigned char *src = f->data;
int16_t *dst = (int16_t *)pvt->outbuf;
int in_samples = f->samples;
int out_samples = pvt->samples;
for (i = 0; i < in_samples; i++)
dst[out_samples++] = AST_ALAW(src[i]);
for ( i = 0; i < f->samples; i++)
dst[pvt->samples + i] = AST_ALAW(src[i]);
pvt->samples += f->samples;
pvt->datalen += 2*f->samples; /* 2 bytes/sample */
pvt->samples = out_samples;
pvt->datalen += in_samples * 2; /* 2 bytes/sample */
return 0;
}
/*! \brief convert and store input samples in output buffer */
static int lintoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
int x;
int i;
char *dst = pvt->outbuf + pvt->samples;
int16_t *src = f->data;
int in_samples = f->samples;
for ( x = 0; x < f->samples; x++)
*dst++ = AST_LIN2A(src[x]);
pvt->samples += f->samples;
pvt->datalen += f->samples; /* 1 byte/sample */
for (i = 0; i < in_samples; i++)
*dst++ = AST_LIN2A(src[i]);
pvt->samples += in_samples;
pvt->datalen += in_samples; /* 1 byte/sample */
return 0;
}

22
codecs/codec_ulaw.c
View File

@ -57,13 +57,15 @@ static int ulawtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
int i;
unsigned char *src = f->data;
int16_t *dst = (int16_t *)pvt->outbuf;
int in_samples = f->samples;
int out_samples = pvt->samples;
/* convert and copy in outbuf */
for (i=0; i<f->samples; i++)
dst[pvt->samples + i] = AST_MULAW(src[i]);
for (i = 0; i < in_samples; i++)
dst[out_samples++] = AST_MULAW(src[i]);
pvt->samples += f->samples;
pvt->datalen += 2 * f->samples;
pvt->samples = out_samples;
pvt->datalen += in_samples * 2; /* 2 bytes/sample */
return 0;
}
@ -71,12 +73,14 @@ static int ulawtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
static int lintoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
int i;
char *dst = pvt->outbuf + pvt->samples;
int16_t *src = f->data;
int in_samples = f->samples;
for (i=0 ; i < f->samples; i++)
pvt->outbuf[pvt->samples + i] = AST_LIN2MU(src[i]);
pvt->samples += f->samples;
pvt->datalen += f->samples; /* 1 byte/sample */
for (i = 0; i < in_samples; i++)
*dst++ = AST_LIN2MU(src[i]);
pvt->samples += in_samples;
pvt->datalen += in_samples; /* 1 byte/sample */
return 0;
}
@ -147,7 +151,7 @@ static void parse_config(void)
{
struct ast_variable *var;
struct ast_config *cfg = ast_config_load("codecs.conf");
if (cfg == NULL)
if (!cfg)
return;
for (var = ast_variable_browse(cfg, "plc"); var; var = var->next) {
if (!strcasecmp(var->name, "genericplc")) {