res_pjsip/res_pjsip_callerid: NULL check on caller id name string
[asterisk/asterisk.git] / codecs / codec_ulaw.c
index 79a1657..e0a4f68 100644 (file)
  * \ingroup codecs
  */
 
-#include <fcntl.h>
-#include <netinet/in.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
+/*** MODULEINFO
+       <support_level>core</support_level>
+ ***/
 
 #include "asterisk.h"
 
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
-#include "asterisk/lock.h"
-#include "asterisk/logger.h"
 #include "asterisk/module.h"
 #include "asterisk/config.h"
-#include "asterisk/options.h"
 #include "asterisk/translate.h"
-#include "asterisk/channel.h"
 #include "asterisk/ulaw.h"
+#include "asterisk/utils.h"
 
-#define BUFFER_SIZE   8096     /* size for the translation buffers */
-
-AST_MUTEX_DEFINE_STATIC(localuser_lock);
-static int localusecnt = 0;
-
-static char *tdesc = "Mu-law Coder/Decoder";
-
-static int useplc = 0;
+#define BUFFER_SAMPLES   8096  /* size for the translation buffers */
 
 /* Sample frame data */
+#include "asterisk/slin.h"
+#include "ex_ulaw.h"
 
-#include "slin_ulaw_ex.h"
-#include "ulaw_slin_ex.h"
-
-/*
- * Private workspace for translating signed linear signals to ulaw.
- */
-
-struct ulaw_encoder_pvt
-{
-  struct ast_frame f;
-  char offset[AST_FRIENDLY_OFFSET];   /* Space to build offset */
-  unsigned char outbuf[BUFFER_SIZE];  /* Encoded ulaw, two nibbles to a word */
-  int tail;
-};
-
-/*
- * Private workspace for translating ulaw signals to signed linear.
- */
-
-struct ulaw_decoder_pvt
-{
-  struct ast_frame f;
-  char offset[AST_FRIENDLY_OFFSET];    /* Space to build offset */
-  short outbuf[BUFFER_SIZE];   /* Decoded signed linear values */
-  int tail;
-  plc_state_t plc;
-};
-
-/*
- * ulawToLin_New
- *  Create a new instance of ulaw_decoder_pvt.
- *
- * Results:
- *  Returns a pointer to the new instance.
- *
- * Side effects:
- *  None.
- */
-
-static struct ast_translator_pvt *
-ulawtolin_new (void)
-{
-  struct ulaw_decoder_pvt *tmp;
-  tmp = malloc (sizeof (struct ulaw_decoder_pvt));
-  if (tmp)
-    {
-         memset(tmp, 0, sizeof(*tmp));
-      tmp->tail = 0;
-      plc_init(&tmp->plc);
-      localusecnt++;
-      ast_update_use_count ();
-    }
-  return (struct ast_translator_pvt *) tmp;
-}
-
-/*
- * LinToulaw_New
- *  Create a new instance of ulaw_encoder_pvt.
- *
- * Results:
- *  Returns a pointer to the new instance.
- *
- * Side effects:
- *  None.
- */
-
-static struct ast_translator_pvt *
-lintoulaw_new (void)
+/*! \brief convert and store samples in outbuf */
+static int ulawtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
 {
-  struct ulaw_encoder_pvt *tmp;
-  tmp = malloc (sizeof (struct ulaw_encoder_pvt));
-  if (tmp)
-    {
-         memset(tmp, 0, sizeof(*tmp));
-      localusecnt++;
-      ast_update_use_count ();
-      tmp->tail = 0;
-    }
-  return (struct ast_translator_pvt *) tmp;
-}
+       int i = f->samples;
+       unsigned char *src = f->data.ptr;
+       int16_t *dst = pvt->outbuf.i16 + pvt->samples;
 
-/*
- * ulawToLin_FrameIn
- *  Fill an input buffer with packed 4-bit ulaw values if there is room
- *  left.
- *
- * Results:
- *  Foo
- *
- * Side effects:
- *  tmp->tail is the number of packed values in the buffer.
- */
+       pvt->samples += i;
+       pvt->datalen += i * 2;  /* 2 bytes/sample */
 
-static int
-ulawtolin_framein (struct ast_translator_pvt *pvt, struct ast_frame *f)
-{
-  struct ulaw_decoder_pvt *tmp = (struct ulaw_decoder_pvt *) pvt;
-  int x;
-  unsigned char *b;
+       /* convert and copy in outbuf */
+       while (i--)
+               *dst++ = AST_MULAW(*src++);
 
-  if(f->datalen == 0) { /* perform PLC with nominal framesize of 20ms/160 samples */
-       if((tmp->tail + 160)  * 2 > sizeof(tmp->outbuf)) {
-           ast_log(LOG_WARNING, "Out of buffer space\n");
-           return -1;
-       }
-       if(useplc) {
-           plc_fillin(&tmp->plc, tmp->outbuf+tmp->tail, 160);
-           tmp->tail += 160;
-       }
        return 0;
-  }
-
-  if ((tmp->tail + f->datalen) * 2 > sizeof(tmp->outbuf)) {
-       ast_log(LOG_WARNING, "Out of buffer space\n");
-       return -1;
-  }
-
-  /* Reset ssindex and signal to frame's specified values */
-  b = f->data;
-  for (x=0;x<f->datalen;x++)
-       tmp->outbuf[tmp->tail + x] = AST_MULAW(b[x]);
-
-  if(useplc) plc_rx(&tmp->plc, tmp->outbuf+tmp->tail, f->datalen);
-
-  tmp->tail += f->datalen;
-  return 0;
 }
 
-/*
- * ulawToLin_FrameOut
- *  Convert 4-bit ulaw encoded signals to 16-bit signed linear.
- *
- * Results:
- *  Converted signals are placed in tmp->f.data, tmp->f.datalen
- *  and tmp->f.samples are calculated.
- *
- * Side effects:
- *  None.
- */
-
-static struct ast_frame *
-ulawtolin_frameout (struct ast_translator_pvt *pvt)
+/*! \brief convert and store samples in outbuf */
+static int lintoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
 {
-  struct ulaw_decoder_pvt *tmp = (struct ulaw_decoder_pvt *) pvt;
+       int i = f->samples;
+       char *dst = pvt->outbuf.c + pvt->samples;
+       int16_t *src = f->data.ptr;
 
-  if (!tmp->tail)
-    return NULL;
+       pvt->samples += i;
+       pvt->datalen += i;      /* 1 byte/sample */
 
-  tmp->f.frametype = AST_FRAME_VOICE;
-  tmp->f.subclass = AST_FORMAT_SLINEAR;
-  tmp->f.datalen = tmp->tail *2;
-  tmp->f.samples = tmp->tail;
-  tmp->f.mallocd = 0;
-  tmp->f.offset = AST_FRIENDLY_OFFSET;
-  tmp->f.src = __PRETTY_FUNCTION__;
-  tmp->f.data = tmp->outbuf;
-  tmp->tail = 0;
-  return &tmp->f;
-}
+       while (i--)
+               *dst++ = AST_LIN2MU(*src++);
 
-/*
- * LinToulaw_FrameIn
- *  Fill an input buffer with 16-bit signed linear PCM values.
- *
- * Results:
- *  None.
- *
- * Side effects:
- *  tmp->tail is number of signal values in the input buffer.
- */
-
-static int
-lintoulaw_framein (struct ast_translator_pvt *pvt, struct ast_frame *f)
-{
-  struct ulaw_encoder_pvt *tmp = (struct ulaw_encoder_pvt *) pvt;
-  int x;
-  short *s;
-  if (tmp->tail + f->datalen/2 >= sizeof(tmp->outbuf))
-    {
-      ast_log (LOG_WARNING, "Out of buffer space\n");
-      return -1;
-    }
-  s = f->data;
-  for (x=0;x<f->datalen/2;x++) 
-       tmp->outbuf[x+tmp->tail] = AST_LIN2MU(s[x]);
-  tmp->tail += f->datalen/2;
-  return 0;
-}
-
-/*
- * LinToulaw_FrameOut
- *  Convert a buffer of raw 16-bit signed linear PCM to a buffer
- *  of 4-bit ulaw packed two to a byte (Big Endian).
- *
- * Results:
- *  Foo
- *
- * Side effects:
- *  Leftover inbuf data gets packed, tail gets updated.
- */
-
-static struct ast_frame *
-lintoulaw_frameout (struct ast_translator_pvt *pvt)
-{
-  struct ulaw_encoder_pvt *tmp = (struct ulaw_encoder_pvt *) pvt;
-  
-  if (tmp->tail) {
-         tmp->f.frametype = AST_FRAME_VOICE;
-         tmp->f.subclass = AST_FORMAT_ULAW;
-         tmp->f.samples = tmp->tail;
-         tmp->f.mallocd = 0;
-         tmp->f.offset = AST_FRIENDLY_OFFSET;
-         tmp->f.src = __PRETTY_FUNCTION__;
-         tmp->f.data = tmp->outbuf;
-         tmp->f.datalen = tmp->tail;
-         tmp->tail = 0;
-         return &tmp->f;
-   } else return NULL;
-}
-
-
-/*
- * ulawToLin_Sample
- */
-
-static struct ast_frame *
-ulawtolin_sample (void)
-{
-  static struct ast_frame f;
-  f.frametype = AST_FRAME_VOICE;
-  f.subclass = AST_FORMAT_ULAW;
-  f.datalen = sizeof (ulaw_slin_ex);
-  f.samples = sizeof(ulaw_slin_ex);
-  f.mallocd = 0;
-  f.offset = 0;
-  f.src = __PRETTY_FUNCTION__;
-  f.data = ulaw_slin_ex;
-  return &f;
-}
-
-/*
- * LinToulaw_Sample
- */
-
-static struct ast_frame *
-lintoulaw_sample (void)
-{
-  static struct ast_frame f;
-  f.frametype = AST_FRAME_VOICE;
-  f.subclass = AST_FORMAT_SLINEAR;
-  f.datalen = sizeof (slin_ulaw_ex);
-  /* Assume 8000 Hz */
-  f.samples = sizeof (slin_ulaw_ex) / 2;
-  f.mallocd = 0;
-  f.offset = 0;
-  f.src = __PRETTY_FUNCTION__;
-  f.data = slin_ulaw_ex;
-  return &f;
-}
-
-/*
- * ulaw_Destroy
- *  Destroys a private workspace.
- *
- * Results:
- *  It's gone!
- *
- * Side effects:
- *  None.
- */
-
-static void
-ulaw_destroy (struct ast_translator_pvt *pvt)
-{
-  free (pvt);
-  localusecnt--;
-  ast_update_use_count ();
+       return 0;
 }
 
-/*
- * The complete translator for ulawToLin.
+/*!
+ * \brief The complete translator for ulawToLin.
  */
 
 static struct ast_translator ulawtolin = {
-  "ulawtolin",
-  AST_FORMAT_ULAW,
-  AST_FORMAT_SLINEAR,
-  ulawtolin_new,
-  ulawtolin_framein,
-  ulawtolin_frameout,
-  ulaw_destroy,
-  /* NULL */
-  ulawtolin_sample
+       .name = "ulawtolin",
+       .src_codec = {
+               .name = "ulaw",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .dst_codec = {
+               .name = "slin",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .format = "slin",
+       .framein = ulawtolin_framein,
+       .sample = ulaw_sample,
+       .buffer_samples = BUFFER_SAMPLES,
+       .buf_size = BUFFER_SAMPLES * 2,
 };
 
-/*
- * The complete translator for LinToulaw.
+static struct ast_translator testlawtolin = {
+       .name = "testlawtolin",
+       .src_codec = {
+               .name = "testlaw",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .dst_codec = {
+               .name = "slin",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .format = "slin",
+       .framein = ulawtolin_framein,
+       .sample = ulaw_sample,
+       .buffer_samples = BUFFER_SAMPLES,
+       .buf_size = BUFFER_SAMPLES * 2,
+};
+
+/*!
+ * \brief The complete translator for LinToulaw.
  */
 
 static struct ast_translator lintoulaw = {
-  "lintoulaw",
-  AST_FORMAT_SLINEAR,
-  AST_FORMAT_ULAW,
-  lintoulaw_new,
-  lintoulaw_framein,
-  lintoulaw_frameout,
-  ulaw_destroy,
-  /* NULL */
-  lintoulaw_sample
+       .name = "lintoulaw",
+       .src_codec = {
+               .name = "slin",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .dst_codec = {
+               .name = "ulaw",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .format = "ulaw",
+       .framein = lintoulaw_framein,
+       .sample = slin8_sample,
+       .buf_size = BUFFER_SAMPLES,
+       .buffer_samples = BUFFER_SAMPLES,
 };
 
-static void 
-parse_config(void)
-{
-  struct ast_config *cfg;
-  struct ast_variable *var;
-  if ((cfg = ast_config_load("codecs.conf"))) {
-    if ((var = ast_variable_browse(cfg, "plc"))) {
-      while (var) {
-       if (!strcasecmp(var->name, "genericplc")) {
-         useplc = ast_true(var->value) ? 1 : 0;
-         if (option_verbose > 2)
-           ast_verbose(VERBOSE_PREFIX_3 "codec_ulaw: %susing generic PLC\n", useplc ? "" : "not ");
-       }
-       var = var->next;
-      }
-    }
-    ast_config_destroy(cfg);
-  }
-}
+static struct ast_translator lintotestlaw = {
+       .name = "lintotestlaw",
+       .src_codec = {
+               .name = "slin",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .dst_codec = {
+               .name = "testlaw",
+               .type = AST_MEDIA_TYPE_AUDIO,
+               .sample_rate = 8000,
+       },
+       .format = "testlaw",
+       .framein = lintoulaw_framein,
+       .sample = slin8_sample,
+       .buf_size = BUFFER_SAMPLES,
+       .buffer_samples = BUFFER_SAMPLES,
+};
 
-int 
-reload(void)
+static int unload_module(void)
 {
-  parse_config();
-  return 0;
-}
+       int res;
 
+       res = ast_unregister_translator(&lintoulaw);
+       res |= ast_unregister_translator(&ulawtolin);
+       res |= ast_unregister_translator(&testlawtolin);
+       res |= ast_unregister_translator(&lintotestlaw);
 
-int
-unload_module (void)
-{
-  int res;
-  ast_mutex_lock (&localuser_lock);
-  res = ast_unregister_translator (&lintoulaw);
-  if (!res)
-    res = ast_unregister_translator (&ulawtolin);
-  if (localusecnt)
-    res = -1;
-  ast_mutex_unlock (&localuser_lock);
-  return res;
+       return res;
 }
 
-int
-load_module (void)
+static int load_module(void)
 {
-  int res;
-  parse_config();
-  res = ast_register_translator (&ulawtolin);
-  if (!res)
-    res = ast_register_translator (&lintoulaw);
-  else
-    ast_unregister_translator (&ulawtolin);
-  return res;
-}
+       int res;
 
-/*
- * Return a description of this module.
- */
+       res = ast_register_translator(&ulawtolin);
+       res |= ast_register_translator(&lintoulaw);
+       res |= ast_register_translator(&lintotestlaw);
+       res |= ast_register_translator(&testlawtolin);
 
-char *
-description (void)
-{
-  return tdesc;
-}
+       if (res) {
+               unload_module();
+               return AST_MODULE_LOAD_DECLINE;
+       }
 
-int
-usecount (void)
-{
-  int res;
-  STANDARD_USECOUNT (res);
-  return res;
+       return AST_MODULE_LOAD_SUCCESS;
 }
 
-char *
-key ()
-{
-  return ASTERISK_GPL_KEY;
-}
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "mu-Law Coder/Decoder",
+       .support_level = AST_MODULE_SUPPORT_CORE,
+       .load = load_module,
+       .unload = unload_module,
+);