Add new windows ACM encoder wrapper.

Original commit message from CVS:
* configure.ac:
* sys/Makefile.am:
* sys/acmenc/Makefile.am:
* sys/acmenc/acmenc.c:
Add new windows ACM encoder wrapper.

ChangeLog

@@ -1,3 +1,11 @@
+2008-08-20  Michael Smith <msmith@songbirdnest.com>
+
+	* configure.ac:
+	* sys/Makefile.am:
+	* sys/acmenc/Makefile.am:
+	* sys/acmenc/acmenc.c:
+	  Add new windows ACM encoder wrapper.
+
 2008-08-18  Zaheer Abbas Merali  <zaheerabbas at merali dot org>
 
 	patch by: Michael Krufky

configure.ac

@@ -238,6 +238,7 @@ dnl *** plug-ins to include ***
 
 dnl these are all the gst plug-ins, compilable without additional libs
 AG_GST_CHECK_PLUGIN(app)
+AG_GST_CHECK_PLUGIN(apex)
 AG_GST_CHECK_PLUGIN(bayer)
 AG_GST_CHECK_PLUGIN(cdxaparse)
 AG_GST_CHECK_PLUGIN(deinterlace)
@@ -1126,6 +1127,14 @@ AG_GST_CHECK_FEATURE(WININET, [Windows internet library], wininet, [
       [HAVE_WININET="yes"], [HAVE_WININET="no"])
 ])
 
+dnl *** acm ***
+translit(dnm, m, l) AM_CONDITIONAL(USE_ACM, true)
+AG_GST_CHECK_FEATURE(ACM, [Windows ACM library], acm, [
+  AC_MSG_CHECKING([Checking for ACM support])
+  AC_CHECK_HEADERS([windows.h msacm.h],
+      [HAVE_ACM="yes"], [HAVE_ACM="no"])
+])
+
 else
 
 dnl not building plugins with external dependencies,
@@ -1174,6 +1183,7 @@ AM_CONDITIONAL(USE_X264, false)
 AM_CONDITIONAL(USE_XVID, false)
 AM_CONDITIONAL(USE_WILDMIDI, false)
 AM_CONDITIONAL(USE_WININET, false)
+AM_CONDITIONAL(USE_ACM, false)
 
 fi dnl of EXT plugins
 
@@ -1237,6 +1247,7 @@ AC_CONFIG_FILES(
 Makefile
 gst-plugins-bad.spec
 gst/Makefile
+gst/apex/Makefile
 gst/app/Makefile
 gst/bayer/Makefile
 gst/cdxaparse/Makefile
@@ -1276,6 +1287,7 @@ gst-libs/gst/app/Makefile
 gst-libs/gst/dshow/Makefile
 sys/Makefile
 sys/dshowdecwrapper/Makefile
+sys/acmenc/Makefile
 sys/dshowsrcwrapper/Makefile
 sys/dshowvideosink/Makefile
 sys/dvb/Makefile
@@ -1308,6 +1320,7 @@ ext/ladspa/Makefile
 ext/libmms/Makefile
 ext/Makefile
 ext/nas/Makefile
+ext/mozilla/Makefile
 ext/mpeg2enc/Makefile
 ext/mplex/Makefile
 ext/musepack/Makefile

sys/Makefile.am

@@ -52,8 +52,14 @@ else
 WININET_DIR=
 endif
 
-SUBDIRS = $(DVB_DIR) $(FBDEV_DIR) $(OSS4_DIR) $(QT_DIR) $(VCD_DIR) $(WININET_DIR)
+if USE_ACM
+ACM_DIR=acmenc
+else
+ACM_DIR=
+endif
 
-DIST_SUBDIRS = dvb fbdev dshowdecwrapper dshowsrcwrapper dshowvideosink \
+SUBDIRS = $(ACM_DIR) $(DVB_DIR) $(FBDEV_DIR) $(OSS4_DIR) $(QT_DIR) $(VCD_DIR) $(WININET_DIR)
+
+DIST_SUBDIRS = acmenc dvb fbdev dshowdecwrapper dshowsrcwrapper dshowvideosink \
 			   oss4 qtwrapper vcd wininet
 

sys/acmenc/Makefile.am

@@ -0,0 +1,9 @@
+plugin_LTLIBRARIES = libgstacmencsink.la
+
+libgstacmencsink_la_SOURCES = acmenc.c
+libgstacmencsink_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
+	$(GST_PLUGINS_BASE_CFLAGS)
+libgstacmencsink_la_LIBADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \
+	-lgstriff-$(GST_MAJORMINOR) -lmsacm32
+libgstacmencsink_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(DIRECTSOUND_LDFLAGS)
+

sys/acmenc/acmenc.c

@@ -0,0 +1,601 @@
+/* GStreamer
+ * Copyright (C) 2008 Pioneers of the Inevitable <songbird@songbirdnest.com>
+ *
+ * Authors: Michael Smith <msmith@songbirdnest.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */  
+    
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif  /* 
 */
+    
+#include <windows.h>
+#include <mmreg.h>
+#include <msacm.h>
+    
+#include <gst/gst.h>
+#include <gst/riff/riff-media.h>
+    
+/* This has to be bigger than some unspecified minimum size or things
+ * break; I don't understand why (4kB isn't enough). Make it nice and
+ * big.
+ */ 
+#define ACM_BUFFER_SIZE (64 * 1024)
+
enum 
+{ 
ARG_0, 
ARG_BITRATE 
+};
+
+#define DEFAULT_BITRATE 128000
+    
+#define ACMENC_PARAMS_QDATA g_quark_from_static_string("acmenc-params")
+    
+#define GST_CAT_DEFAULT acmenc_debug
+    GST_DEBUG_CATEGORY_STATIC (acmenc_debug);
+

static GstStaticPadTemplate acmenc_sink_template =
+    
GST_STATIC_PAD_TEMPLATE ("sink", 
GST_PAD_SINK, 
GST_PAD_ALWAYS,
+    
GST_STATIC_CAPS ("audio/x-raw-int, " 
 "depth = (int)16, " 
+        "width = (int)16, " 
 "endianness = (int)" G_STRINGIFY (G_BYTE_ORDER)
+        ", " 
 "signed = (boolean)TRUE, " 
 "channels = (int) [1,2], " 
+        "rate = (int)[1, MAX]") 
);
+

static GstStaticPadTemplate acmenc_src_template =
+    
GST_STATIC_PAD_TEMPLATE ("src", 
GST_PAD_SRC, 
GST_PAD_ALWAYS,
+    
GST_STATIC_CAPS_ANY);
+

static GstElementClass *parent_class = NULL;
+

typedef struct _ACMEncClass 
+{
+  
GstElementClass parent_class;
+  

HACMDRIVERID driverId;
+
} ACMEncClass;
+

typedef struct _ACMEnc 
+{
+  
GstElement parent;
+  

GstPad * sinkpad;
+  
GstPad * srcpad;
+  

gboolean is_setup;
+  

WAVEFORMATEX infmt;
+  
WAVEFORMATEX * outfmt;
+  

HACMDRIVER driver;
+  
HACMSTREAM stream;
+  
ACMSTREAMHEADER header;
+  
+      /* Offset into input buffer to write next data */ 
+  int offset;
+   
+      /* Number of bytes written */ 
+  int bytes_output;
+   
+      /* From received caps */ 
+  int rate;
+   
int channels;
+   
+      /* Set in properties */ 
+  int selected_bitrate;
+   

GstCaps * output_caps;
+ 
} ACMEnc;
+


typedef struct _ACMEncParams 
+{
+  
HACMDRIVERID driverId;
+  
HMODULE dll;
+  
gchar * name;
+
} ACMEncParams;
+

static GstCaps *
+acmenc_caps_from_format (WAVEFORMATEX * fmt) 
+{
+  
return gst_riff_create_audio_caps (fmt->wFormatTag, 
NULL,
+      (gst_riff_strf_auds *) fmt, NULL, NULL, NULL);
+
}
+
+

gboolean acmenc_set_input_format (ACMEnc * enc, WAVEFORMATEX * infmt) 
+{
+  
infmt->wFormatTag = WAVE_FORMAT_PCM;
+  
infmt->nChannels = enc->channels;
+  
infmt->nSamplesPerSec = enc->rate;
+  
infmt->nAvgBytesPerSec = 2 * enc->channels * enc->rate;
+  
infmt->nBlockAlign = 2 * enc->channels;
+  
infmt->wBitsPerSample = 16;
+  
infmt->cbSize = 0;
+  

return TRUE;
+
}
+
+
BOOL CALLBACK acmenc_format_enum (HACMDRIVERID driverId, LPACMFORMATDETAILS fd,
+    DWORD_PTR dwInstance, DWORD fdwSupport) 
+{
+  
ACMEnc * enc = (ACMEnc *) dwInstance;
+  
int oldbrdiff, newbrdiff;
+  
gboolean oldmatch, newmatch;
+  

if (!enc->outfmt) {
+    
+        /* First one is always the best so far */ 
+        enc->outfmt =
+        (WAVEFORMATEX *) g_malloc (fd->pwfx->cbSize + sizeof (WAVEFORMATEX));
+    
memcpy (enc->outfmt, fd->pwfx, fd->pwfx->cbSize + sizeof (WAVEFORMATEX));
+    
return TRUE;
+  
}
+  
+      /* We prefer a format with exact rate/channels match,
+       * and the closest bitrate match. Otherwise, we accept
+       * the closest bitrate match.
+       */ 
+      newmatch = (enc->channels == fd->pwfx->nChannels) && 
+      (enc->rate == fd->pwfx->nSamplesPerSec);
+  
oldmatch = (enc->outfmt->nChannels == enc->channels) && 
+      (enc->outfmt->nSamplesPerSec == enc->rate);
+  
newbrdiff = abs (enc->selected_bitrate - fd->pwfx->nAvgBytesPerSec * 8);
+  
oldbrdiff = abs (enc->selected_bitrate - enc->outfmt->nAvgBytesPerSec * 8);
+  

if ((newmatch && (!oldmatch || (newbrdiff < oldbrdiff))) || 
+      (!newmatch && !oldmatch && (newbrdiff < oldbrdiff)))
+    
 {
+    
g_free (enc->outfmt);
+    
enc->outfmt =
+        (WAVEFORMATEX *) g_malloc (fd->pwfx->cbSize + sizeof (WAVEFORMATEX));
+    
memcpy (enc->outfmt, fd->pwfx, fd->pwfx->cbSize + sizeof (WAVEFORMATEX));
+    
}
+  
+      /* Always return TRUE to continue enumeration */ 
+      return TRUE;
+
}
+
+

gboolean acmenc_set_format (ACMEnc * enc) 
+{
+  
WAVEFORMATEX * in = NULL;
+  
ACMFORMATDETAILS details;
+  
MMRESULT res;
+  
int maxSize;
+  
+      /* Input is fixed */ 
+      acmenc_set_input_format (enc, &enc->infmt);
+  
+      /* Select the closest output that matches */ 
+      res =
+      acmMetrics ((HACMOBJ) enc->driver, ACM_METRIC_MAX_SIZE_FORMAT, &maxSize);
+  
+      /* Set the format to match what we'll be providing */ 
+      in = (WAVEFORMATEX *) g_malloc (maxSize);
+  
acmenc_set_input_format (enc, in);
+  

in->cbSize = (WORD) (maxSize - sizeof (*in));
+  

details.cbStruct = sizeof (details);
+  
details.dwFormatIndex = 0;
+  
details.dwFormatTag = WAVE_FORMAT_UNKNOWN;
+  
details.fdwSupport = 0;
+  
details.pwfx = in;
+  
details.cbwfx = maxSize;
+  
+      /* We set enc->outfmt to the closest match in the callback */ 
+      res =
+      acmFormatEnum (enc->driver, &details, acmenc_format_enum, (DWORD_PTR) enc,
+      ACM_FORMATENUMF_CONVERT);
+  

g_free (in);
+  

if (res) {
+    
GST_WARNING_OBJECT (enc, "Failed to enumerate formats");
+    
return FALSE;
+  
}
+  

if (!enc->outfmt) {
+    
GST_WARNING_OBJECT (enc, "No compatible output for input format");
+    
return FALSE;
+  
}
+  

return TRUE;
+
}
+

static gboolean 
+acmenc_setup (ACMEnc * enc) 
+{
+  
MMRESULT res;
+  
ACMEncClass * encclass = (ACMEncClass *) G_OBJECT_GET_CLASS (enc);
+  
int destBufferSize;
+  

res = acmDriverOpen (&enc->driver, encclass->driverId, 0);
+  
if (res) {
+    
GST_WARNING ("Failed to open ACM driver: %d", res);
+    
return FALSE;
+  
}
+  

if (!acmenc_set_format (enc))
+    
return FALSE;
+  

res =
+      acmStreamOpen (&enc->stream, enc->driver, &enc->infmt, enc->outfmt, 
0, 0,
+      0, ACM_STREAMOPENF_NONREALTIME);
+  
if (res) {
+    
GST_WARNING_OBJECT (enc, "Failed to open ACM stream");
+    
return FALSE;
+  
}
+  

enc->header.cbStruct = sizeof (ACMSTREAMHEADER);
+  
enc->header.fdwStatus = 0;
+  
enc->header.dwUser = 0;
+  

enc->header.pbSrc = (BYTE *) g_malloc (ACM_BUFFER_SIZE);
+  
enc->header.cbSrcLength = ACM_BUFFER_SIZE;
+  
enc->header.cbSrcLengthUsed = 0;
+  
enc->header.dwSrcUser = 0;
+  
+      /* Ask what buffer size we need to use for our output */ 
+      acmStreamSize (enc->stream, ACM_BUFFER_SIZE, 
&destBufferSize,
+      ACM_STREAMSIZEF_SOURCE);
+  

enc->header.pbDst = (BYTE *) g_malloc (destBufferSize);
+  
enc->header.cbDstLength = destBufferSize;
+  
enc->header.cbDstLengthUsed = 0;
+  
enc->header.dwDstUser = 0;
+  

res = acmStreamPrepareHeader (enc->stream, &enc->header, 0);
+  
if (res) {
+    
GST_WARNING_OBJECT (enc, "Failed to prepare ACM stream");
+    
return FALSE;
+  
}
+  

enc->output_caps = acmenc_caps_from_format (enc->outfmt);
+  
if (enc->output_caps) {
+    
gst_pad_set_caps (enc->srcpad, enc->output_caps);
+  
}
+  

enc->is_setup = TRUE;
+  
return TRUE;
+
}
+

static void 
+acmenc_teardown (ACMEnc * enc) 
+{
+  
if (enc->outfmt) {
+    
g_free (enc->outfmt);
+    
enc->outfmt = NULL;
+  
}
+  

if (enc->output_caps) {
+    
gst_caps_unref (enc->output_caps);
+    
enc->output_caps = NULL;
+  
}
+  

if (enc->header.pbSrc)
+    
g_free (enc->header.pbSrc);
+  
if (enc->header.pbDst)
+    
g_free (enc->header.pbDst);
+  
memset (&enc->header, 0, sizeof (enc->header));
+  

if (enc->stream) {
+    
acmStreamClose (enc->stream, 0);
+    
enc->stream = 0;
+  
}
+  
if (enc->driver) {
+    
acmDriverClose (enc->driver, 0);
+    
enc->driver = 0;
+  
}
+  

enc->bytes_output = 0;
+  
enc->offset = 0;
+  
enc->is_setup = FALSE;
+
}
+

static gboolean
+acmenc_sink_setcaps (GstPad * pad, GstCaps * caps) 
+{
+  
ACMEnc * enc = (ACMEnc *) GST_PAD_PARENT (pad);
+  
GstStructure * structure;
+  
gboolean ret;
+  

structure = gst_caps_get_structure (caps, 0);
+  
gst_structure_get_int (structure, "channels", &enc->channels);
+  
gst_structure_get_int (structure, "rate", &enc->rate);
+  

if (enc->is_setup)
+    
acmenc_teardown (enc);
+  
ret = acmenc_setup (enc);
+  

return ret;
+
}
+

static GstFlowReturn 
+acmenc_push_output (ACMEnc * enc) 
+{
+  
GstFlowReturn ret = GST_FLOW_OK;
+  

if (enc->header.cbDstLengthUsed > 0) {
+    
GstBuffer * outbuf =
+        gst_buffer_new_and_alloc (enc->header.cbDstLengthUsed);
+    
memcpy (GST_BUFFER_DATA (outbuf), enc->header.pbDst,
+        enc->header.cbDstLengthUsed);
+    

if (enc->outfmt->nAvgBytesPerSec > 0) {
+      
+          /* We have a bitrate, so we can create a timestamp, hopefully */ 
+          GST_BUFFER_TIMESTAMP (outbuf) =
+          gst_util_uint64_scale_int (
enc->bytes_output, GST_SECOND,
+          enc->outfmt->nAvgBytesPerSec);
+    
}
+    
enc->bytes_output += enc->header.cbDstLengthUsed;
+    

GST_DEBUG_OBJECT (enc, "Pushing %d byte encoded buffer",
+        enc->header.cbDstLengthUsed);
+    
ret = gst_pad_push (enc->srcpad, outbuf);
+  
}
+  

return ret;
+
}
+

static GstFlowReturn
+acmenc_chain (GstPad * pad, GstBuffer * buf) 
+{
+  
MMRESULT res;
+  
ACMEnc * enc = (ACMEnc *) GST_PAD_PARENT (pad);
+  
guchar * data = GST_BUFFER_DATA (buf);
+  
gint len = GST_BUFFER_SIZE (buf);
+  
int chunklen;
+  
GstFlowReturn ret = GST_FLOW_OK;
+  

while (len) {
+    
chunklen = MIN (len, ACM_BUFFER_SIZE - enc->offset);
+    
memcpy (enc->header.pbSrc + enc->offset, data, chunklen);
+    
enc->header.cbSrcLength = enc->offset + chunklen;
+    
data += chunklen;
+    
len -= chunklen;
+    
+        /* Now we have a buffer ready to go */ 
+        res =
+        acmStreamConvert (enc->stream, &enc->header,
+        
ACM_STREAMCONVERTF_BLOCKALIGN);
+    
if (res) {
+      
GST_WARNING_OBJECT (enc, "Failed to encode data");
+      
break;
+    
}
+    

if (enc->header.cbSrcLengthUsed > 0)
+      
 {
+      
if (enc->header.cbSrcLengthUsed != enc->header.cbSrcLength) {
+        
+            /* Only part of input consumed */ 
+            memmove (enc->header.pbSrc,
+            enc->header.pbSrc + enc->header.cbSrcLengthUsed,
+            
enc->header.cbSrcLengthUsed);
+        
enc->offset -= enc->header.cbSrcLengthUsed;
+      
}
+      
+      else
+        
enc->offset = 0;
+      
}
+    
+        /* Write out any data produced */ 
+        acmenc_push_output (enc);
+  
}
+  
return ret;
+
}
+
+

GstFlowReturn acmenc_finish_stream (ACMEnc * enc) 
+{
+  
MMRESULT res;
+  
GstFlowReturn ret = GST_FLOW_OK;
+  
int len;
+  
+      /* Ensure any remaining input data is consumed */ 
+      len = enc->offset;
+  
enc->header.cbSrcLength = len;
+  

res =
+      acmStreamConvert (enc->stream, &enc->header,
+      
ACM_STREAMCONVERTF_BLOCKALIGN | ACM_STREAMCONVERTF_END);
+  
if (res) {
+    
GST_WARNING_OBJECT (enc, "Failed to encode data");
+    
return ret;
+  
}
+  

ret = acmenc_push_output (enc);
+  
return ret;
+
}
+

static gboolean
+acmenc_sink_event (GstPad * pad, GstEvent * event) 
+{
+  
ACMEnc * enc = (ACMEnc *) GST_PAD_PARENT (pad);
+  
gboolean res;
+  

switch (GST_EVENT_TYPE (event)) {
+    
case GST_EVENT_EOS:
+      
acmenc_finish_stream (enc);
+      

res = gst_pad_push_event (enc->srcpad, event);
+      
break;
+    
default:
+      
res = gst_pad_push_event (enc->srcpad, event);
+      
break;
+  
}
+  

return res;
+
}
+

static void 
+acmenc_dispose (GObject * obj) 
+{
+  
ACMEnc * enc = (ACMEnc *) obj;
+  

acmenc_teardown (enc);
+  

G_OBJECT_CLASS (parent_class)->dispose (obj);
+
} 

static void 
+
+acmenc_init (ACMEnc * enc) 
+{
+  
enc->sinkpad =
+      gst_pad_new_from_static_template (&acmenc_sink_template, "sink");
+  
gst_pad_set_setcaps_function (enc->sinkpad,
+      
GST_DEBUG_FUNCPTR (acmenc_sink_setcaps));
+  
gst_pad_set_chain_function (enc->sinkpad, 
GST_DEBUG_FUNCPTR (acmenc_chain));
+  
gst_pad_set_event_function (enc->sinkpad,
+      
GST_DEBUG_FUNCPTR (acmenc_sink_event));
+  
gst_element_add_pad (GST_ELEMENT (enc), enc->sinkpad);
+  

enc->srcpad =
+      gst_pad_new_from_static_template (&acmenc_src_template, "src");
+  
gst_element_add_pad (GST_ELEMENT (enc), enc->srcpad);
+  

enc->selected_bitrate = DEFAULT_BITRATE;
+
} 

static void 
+acmenc_set_property (GObject * obj, guint prop_id, 
const GValue * value,
+    GParamSpec * pspec) 
+{
+  
ACMEnc * enc = (ACMEnc *) obj;
+  

switch (prop_id) {
+    
case ARG_BITRATE:
+      
enc->selected_bitrate = g_value_get_int (value);
+      
break;
+    
default:
+      
G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, prop_id, pspec);
+  
}
+
}
+

static void 
+acmenc_get_property (GObject * obj, guint prop_id, 
GValue * value,
+    GParamSpec * pspec) 
+{
+  
ACMEnc * enc = (ACMEnc *) obj;
+  

switch (prop_id) {
+    
case ARG_BITRATE:
+      
g_value_set_int (value, enc->selected_bitrate);
+      
break;
+    
default:
+      
G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, prop_id, pspec);
+  
}
+
}
+

static void 
+acmenc_class_init (ACMEncClass * klass) 
+{
+  
GObjectClass * gobjectclass = (GObjectClass *) klass;
+  

parent_class = (GstElementClass *) g_type_class_peek_parent (klass);
+  

gobjectclass->dispose = acmenc_dispose;
+  
gobjectclass->set_property = acmenc_set_property;
+  
gobjectclass->get_property = acmenc_get_property;
+  

g_object_class_install_property (gobjectclass, ARG_BITRATE,
+      
g_param_spec_int ("bitrate", "Bitrate", 
"Bitrate to encode at (in bps)",
+          0, 1000000, DEFAULT_BITRATE, 
G_PARAM_READWRITE));
+
} 

static void 
+
+acmenc_base_init (ACMEncClass * klass) 
+{
+  
GstElementClass * element_class = GST_ELEMENT_CLASS (klass);
+  
GstElementDetails details;
+  
ACMEncParams * params;
+  
ACMDRIVERDETAILS driverdetails;
+  
gchar * shortname, *longname;
+  
MMRESULT res;
+  

gst_element_class_add_pad_template (element_class,
+      
gst_static_pad_template_get (&acmenc_sink_template));
+  
gst_element_class_add_pad_template (element_class,
+      
gst_static_pad_template_get (&acmenc_src_template));
+  

params =
+      (ACMEncParams *) 
 g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
+      ACMENC_PARAMS_QDATA);
+  
g_assert (params);
+  

memset (&driverdetails, 0, sizeof (driverdetails));
+  
driverdetails.cbStruct = sizeof (driverdetails);
+  
res = acmDriverDetails (params->driverId, &driverdetails, 0);
+  
if (res) {
+    
GST_WARNING ("Could not get driver details: %d", res);
+  
}
+  

shortname =
+      g_utf16_to_utf8 (driverdetails.szShortName, -1, NULL, NULL, NULL);
+  
longname = g_utf16_to_utf8 (driverdetails.szLongName, -1, NULL, NULL, NULL);
+  

details.longname = g_strdup_printf ("ACM Encoder: %s", (shortname
+          && *shortname) ? shortname : params->name);
+  
details.klass = "Codec/Encoder/Audio";
+  
details.description = g_strdup_printf ("ACM Encoder: %s", (longname
+          && *longname) ? longname : params->name);
+  
details.author = "Pioneers of the Inevitable <songbird@songbirdnest.com>";
+  

gst_element_class_set_details (element_class, &details);
+  

g_free (shortname);
+  
g_free (longname);
+  
g_free (details.longname);
+  
g_free (details.description);
+  

klass->driverId = params->driverId;
+
}
+

static ACMEncParams *
+acmenc_open_driver (wchar_t * filename) 
+{
+  
HACMDRIVER driver = NULL;
+  
HACMDRIVERID driverid = NULL;
+  
HMODULE mod = NULL;
+  
FARPROC func;
+  
MMRESULT res;
+  
ACMEncParams * params;
+  

mod = LoadLibrary (filename);
+  
if (!mod) {
+    
GST_WARNING ("Failed to load ACM");
+    
goto done;
+  
}
+  

func = GetProcAddress (mod, "DriverProc");
+  
if (!func) {
+    
GST_WARNING ("Failed to find 'DriverProc' in ACM");
+    
goto done;
+  
}
+  

res =
+      acmDriverAdd (&driverid, mod, (LPARAM) func, 0, ACM_DRIVERADDF_FUNCTION);
+  

if (res) {
+    
GST_WARNING ("Failed to add ACM driver: %d", res);
+    
goto done;
+  
}
+  

params = g_new0 (ACMEncParams, 1);
+  
params->dll = mod;
+  
params->driverId = driverid;
+  

return params;
+

done:
if (driverid)
+    
acmDriverRemove (driverid, 0);
+  
if (mod)
+    
FreeLibrary (mod);
+  

return NULL;
+
}
+

static gboolean
+acmenc_register_file (GstPlugin * plugin, wchar_t * filename) 
+{
+  
ACMEncParams * params;
+  
gchar * type_name, *name;
+  
GType type;
+  
GTypeInfo typeinfo = {
+  
sizeof (ACMEncClass), 
+        (GBaseInitFunc) acmenc_base_init, 
NULL, 
+        (GClassInitFunc) acmenc_class_init, 
NULL, 
NULL, 
sizeof (ACMEnc),
+        
0, 
(GInstanceInitFunc) acmenc_init, 
};
+  

params = acmenc_open_driver (filename);
+  
if (!params)
+    
return FALSE;
+  
+      /* Strip .acm off the end, convert to utf-8 */ 
+      name =
+      g_utf16_to_utf8 (filename, (glong) wcslen (filename) - 4, 
NULL, NULL,
+      NULL);
+  
params->name = name;
+  

type_name = g_strdup_printf ("acmenc_%s", name);
+  
type = g_type_register_static (GST_TYPE_ELEMENT, type_name, &typeinfo, 0);
+  
+      /* Store params in type qdata */ 
+      g_type_set_qdata (type, ACMENC_PARAMS_QDATA, (gpointer) params);
+  
+      /* register type */ 
+      if (!gst_element_register (plugin, type_name, GST_RANK_NONE, type)) {
+    
g_warning ("Failed to register %s", type_name);;
+    
g_type_set_qdata (type, ACMENC_PARAMS_QDATA, NULL);
+    
g_free (name);
+    
g_free (type_name);
+    
g_free (params);
+    
return FALSE;
+  
}
+  
g_free (type_name);
+  

return TRUE;
+
}
+

static gboolean 
+acmenc_register (GstPlugin * plugin) 
+{
+  
int res;
+  
wchar_t dirname[1024];
+  
WIN32_FIND_DATA filedata;
+  
HANDLE find;
+  

res = GetSystemDirectory (dirname, sizeof (dirname) / sizeof (wchar_t));
+  
if (!res || res > 1000) {
+    
GST_WARNING ("Couldn't get system directory");
+    
return FALSE;
+  
}
+  
wcscat (dirname, L"\\*.acm");
+  

find = FindFirstFile (dirname, &filedata);
+  
if (find == INVALID_HANDLE_VALUE) {
+    
GST_WARNING ("Failed to find ACM files: %x", GetLastError ());
+    
return FALSE;
+  
}
+  
+  do {
+    
char *filename =
+        g_utf16_to_utf8 (filedata.cFileName, -1, NULL, NULL, NULL);
+    
GST_INFO ("Registering ACM filter from file %s", filename);
+    

if (acmenc_register_file (plugin, filedata.cFileName))
+      
GST_INFO ("Loading filter from ACM '%s' succeeded", filename);
+    
+    else
+      
GST_WARNING ("Loading filter from ACM '%s' failed", filename);
+    

g_free (filename);
+  

} while (FindNextFile (find, &filedata));
+  

FindClose (find);
+  

return TRUE;
+
}
+

static gboolean 
+plugin_init (GstPlugin * plugin) 
+{
+  
gboolean res;
+  

GST_DEBUG_CATEGORY_INIT (acmenc_debug, "acmenc", 
0, "ACM Encoders");
+  

GST_INFO ("Registering ACM encoders");
+  
res = acmenc_register (plugin);
+  

return res;
+
}
+
+

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, 
GST_VERSION_MINOR, 
"acmenc",
+    
"ACM Encoder wrapper", 
plugin_init, VERSION, "LGPL", "GStreamer",
+    "http://gstreamer.net/")