From cd10bd931a7f54a516255adc25cd5b6ab2f7a75a Mon Sep 17 00:00:00 2001
From: Russell Bryant <russell@russellbryant.com>
Date: Wed, 21 Oct 2009 03:09:04 +0000
Subject: [PATCH] Merged revisions 224931 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4
........
r224931 | russell | 2009-10-20 21:59:54 -0500 (Tue, 20 Oct 2009) | 5 lines
Isolate frames returned from a DSP instance or codec translator.
The reasoning for these changes are the same as what I wrote in the commit
message for rev 222878.
........
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@224932 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
codecs/codec_dahdi.c | 12 ++++--------
include/asterisk/dsp.h | 12 ------------
include/asterisk/frame.h | 8 --------
include/asterisk/translate.h | 15 ---------------
main/dsp.c | 33 +++------------------------------
main/frame.c | 8 --------
main/translate.c | 29 +----------------------------
7 files changed, 8 insertions(+), 109 deletions(-)
diff --git a/codecs/codec_dahdi.c b/codecs/codec_dahdi.c
index 4790aec965..eada4c2fd5 100644
--- a/codecs/codec_dahdi.c
+++ b/codecs/codec_dahdi.c
@@ -235,10 +235,9 @@ static struct ast_frame *dahdi_encoder_frameout(struct ast_trans_pvt *pvt)
pvt->f.offset = 0;
pvt->f.datalen = 0;
pvt->f.mallocd = 0;
- ast_set_flag(&pvt->f, AST_FRFLAG_FROM_TRANSLATOR);
pvt->samples = 0;
- return &pvt->f;
+ return ast_frisolate(&pvt->f);
} else if (1 == dahdip->fake) {
dahdip->fake = 0;
@@ -263,11 +262,10 @@ static struct ast_frame *dahdi_encoder_frameout(struct ast_trans_pvt *pvt)
pvt->f.offset = AST_FRIENDLY_OFFSET;
pvt->f.src = pvt->t->name;
pvt->f.data.ptr = pvt->outbuf.c;
- ast_set_flag(&pvt->f, AST_FRFLAG_FROM_TRANSLATOR);
pvt->samples = 0;
pvt->datalen = 0;
- return &pvt->f;
+ return ast_frisolate(&pvt->f);
}
/* Shouldn't get here... */
@@ -310,9 +308,8 @@ static struct ast_frame *dahdi_decoder_frameout(struct ast_trans_pvt *pvt)
pvt->f.offset = 0;
pvt->f.datalen = 0;
pvt->f.mallocd = 0;
- ast_set_flag(&pvt->f, AST_FRFLAG_FROM_TRANSLATOR);
pvt->samples = 0;
- return &pvt->f;
+ return ast_frisolate(&pvt->f);
} else if (1 == dahdip->fake) {
pvt->samples = 0;
dahdip->fake = 0;
@@ -349,10 +346,9 @@ static struct ast_frame *dahdi_decoder_frameout(struct ast_trans_pvt *pvt)
pvt->f.src = pvt->t->name;
pvt->f.data.ptr = pvt->outbuf.c;
pvt->f.samples = dahdip->required_samples;
- ast_set_flag(&pvt->f, AST_FRFLAG_FROM_TRANSLATOR);
pvt->samples = 0;
- return &pvt->f;
+ return ast_frisolate(&pvt->f);
}
/* Shouldn't get here... */
diff --git a/include/asterisk/dsp.h b/include/asterisk/dsp.h
index 8e6024cd40..bea0e6f5eb 100644
--- a/include/asterisk/dsp.h
+++ b/include/asterisk/dsp.h
@@ -157,16 +157,4 @@ int ast_dsp_reload(void);
*/
int ast_dsp_init(void);
-/*!
- * \brief Hint that a frame from a dsp was freed
- *
- * This is called from ast_frame_free if AST_FRFLAG_FROM_DSP is set. This occurs
- * because it is possible for the dsp to be freed while someone still holds a reference
- * to the frame that is in that dsp. This has been known to happen when the dsp on a DAHDI
- * channel detects a busy signal. The channel is hung up, and the application that read the
- * frame to begin with still has a reference to the frame.
- *
- * \return nothing
- */
-void ast_dsp_frame_freed(struct ast_frame *fr);
#endif /* _ASTERISK_DSP_H */
diff --git a/include/asterisk/frame.h b/include/asterisk/frame.h
index 7246aad833..30de19a5f2 100644
--- a/include/asterisk/frame.h
+++ b/include/asterisk/frame.h
@@ -128,14 +128,6 @@ enum ast_frame_type {
enum {
/*! This frame contains valid timing information */
AST_FRFLAG_HAS_TIMING_INFO = (1 << 0),
- /*! This frame came from a translator and is still the original frame.
- * The translator can not be free'd if the frame inside of it still has
- * this flag set. */
- AST_FRFLAG_FROM_TRANSLATOR = (1 << 1),
- /*! This frame came from a dsp and is still the original frame.
- * The dsp cannot be free'd if the frame inside of it still has
- * this flag set. */
- AST_FRFLAG_FROM_DSP = (1 << 2),
};
/*! \brief Data structure associated with a single frame of data
diff --git a/include/asterisk/translate.h b/include/asterisk/translate.h
index 01841ee017..0e0eae1ec3 100644
--- a/include/asterisk/translate.h
+++ b/include/asterisk/translate.h
@@ -151,7 +151,6 @@ struct ast_trans_pvt {
struct ast_trans_pvt *next; /*!< next in translator chain */
struct timeval nextin;
struct timeval nextout;
- unsigned int destroy:1;
};
/*! \brief generic frameout function */
@@ -257,20 +256,6 @@ unsigned int ast_translate_path_steps(unsigned int dest, unsigned int src);
*/
unsigned int ast_translate_available_formats(unsigned int dest, unsigned int src);
-/*!
- * \brief Hint that a frame from a translator has been freed
- *
- * This is sort of a hack. This function gets called when ast_frame_free() gets
- * called on a frame that has the AST_FRFLAG_FROM_TRANSLATOR flag set. This is
- * because it is possible for a translation path to be destroyed while a frame
- * from a translator is still in use. Specifically, this happens if a masquerade
- * happens after a call to ast_read() but before the frame is done being processed,
- * since the frame processing is generally done without the channel lock held.
- *
- * \return nothing
- */
-void ast_translate_frame_freed(struct ast_frame *fr);
-
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
diff --git a/main/dsp.c b/main/dsp.c
index 83a6dd79ba..5854037862 100644
--- a/main/dsp.c
+++ b/main/dsp.c
@@ -391,7 +391,6 @@ struct ast_dsp {
digit_detect_state_t digit_state;
tone_detect_state_t cng_tone_state;
tone_detect_state_t ced_tone_state;
- int destroy;
};
static void mute_fragment(struct ast_dsp *dsp, fragment_t *fragment)
@@ -1350,8 +1349,7 @@ struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp,
memset(&dsp->f, 0, sizeof(dsp->f));
dsp->f.frametype = AST_FRAME_NULL;
ast_frfree(af);
- ast_set_flag(&dsp->f, AST_FRFLAG_FROM_DSP);
- return &dsp->f;
+ return ast_frisolate(&dsp->f);
}
if ((dsp->features & DSP_FEATURE_BUSY_DETECT) && ast_dsp_busydetect(dsp)) {
chan->_softhangup |= AST_SOFTHANGUP_DEV;
@@ -1360,8 +1358,7 @@ struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp,
dsp->f.subclass = AST_CONTROL_BUSY;
ast_frfree(af);
ast_debug(1, "Requesting Hangup because the busy tone was detected on channel %s\n", chan->name);
- ast_set_flag(&dsp->f, AST_FRFLAG_FROM_DSP);
- return &dsp->f;
+ return ast_frisolate(&dsp->f);
}
if ((dsp->features & DSP_FEATURE_FAX_DETECT)) {
@@ -1471,8 +1468,7 @@ done:
ast_queue_frame(chan, af);
}
ast_frfree(af);
- ast_set_flag(outf, AST_FRFLAG_FROM_DSP);
- return outf;
+ return ast_frisolate(outf);
} else {
return af;
}
@@ -1522,16 +1518,6 @@ void ast_dsp_set_features(struct ast_dsp *dsp, int features)
void ast_dsp_free(struct ast_dsp *dsp)
{
- if (ast_test_flag(&dsp->f, AST_FRFLAG_FROM_DSP)) {
- /* If this flag is still set, that means that the dsp's destruction
- * been torn down, while we still have a frame out there being used.
- * When ast_frfree() gets called on that frame, this ast_trans_pvt
- * will get destroyed, too. */
-
- dsp->destroy = 1;
-
- return;
- }
ast_free(dsp);
}
@@ -1697,16 +1683,3 @@ int ast_dsp_reload(void)
return _dsp_init(1);
}
-void ast_dsp_frame_freed(struct ast_frame *fr)
-{
- struct ast_dsp *dsp;
-
- ast_clear_flag(fr, AST_FRFLAG_FROM_DSP);
-
- dsp = (struct ast_dsp *) (((char *) fr) - offsetof(struct ast_dsp, f));
-
- if (!dsp->destroy)
- return;
-
- ast_dsp_free(dsp);
-}
diff --git a/main/frame.c b/main/frame.c
index 1b8dead2a3..f24c7a4dcd 100644
--- a/main/frame.c
+++ b/main/frame.c
@@ -332,12 +332,6 @@ static void frame_cache_cleanup(void *data)
static void __frame_free(struct ast_frame *fr, int cache)
{
- if (ast_test_flag(fr, AST_FRFLAG_FROM_TRANSLATOR)) {
- ast_translate_frame_freed(fr);
- } else if (ast_test_flag(fr, AST_FRFLAG_FROM_DSP)) {
- ast_dsp_frame_freed(fr);
- }
-
if (!fr->mallocd)
return;
@@ -422,8 +416,6 @@ struct ast_frame *ast_frisolate(struct ast_frame *fr)
out->seqno = fr->seqno;
}
} else {
- ast_clear_flag(fr, AST_FRFLAG_FROM_TRANSLATOR);
- ast_clear_flag(fr, AST_FRFLAG_FROM_DSP);
out = fr;
}
diff --git a/main/translate.c b/main/translate.c
index 1e85a3744d..a4a915291f 100644
--- a/main/translate.c
+++ b/main/translate.c
@@ -134,17 +134,6 @@ static void destroy(struct ast_trans_pvt *pvt)
{
struct ast_translator *t = pvt->t;
- if (ast_test_flag(&pvt->f, AST_FRFLAG_FROM_TRANSLATOR)) {
- /* If this flag is still set, that means that the translation path has
- * been torn down, while we still have a frame out there being used.
- * When ast_frfree() gets called on that frame, this ast_trans_pvt
- * will get destroyed, too. */
-
- pvt->destroy = 1;
-
- return;
- }
-
if (t->destroy)
t->destroy(pvt);
ast_free(pvt);
@@ -238,9 +227,7 @@ struct ast_frame *ast_trans_frameout(struct ast_trans_pvt *pvt,
f->src = pvt->t->name;
f->data.ptr = pvt->outbuf.c;
- ast_set_flag(f, AST_FRFLAG_FROM_TRANSLATOR);
-
- return f;
+ return ast_frisolate(f);
}
static struct ast_frame *default_frameout(struct ast_trans_pvt *pvt)
@@ -905,17 +892,3 @@ unsigned int ast_translate_available_formats(unsigned int dest, unsigned int src
return res;
}
-
-void ast_translate_frame_freed(struct ast_frame *fr)
-{
- struct ast_trans_pvt *pvt;
-
- ast_clear_flag(fr, AST_FRFLAG_FROM_TRANSLATOR);
-
- pvt = (struct ast_trans_pvt *) (((char *) fr) - offsetof(struct ast_trans_pvt, f));
-
- if (!pvt->destroy)
- return;
-
- destroy(pvt);
-}
--
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