3 files changed, 386 insertions, 2 deletions
diff --git a/sys/Makefile.am b/sys/Makefile.am
index 88d7b265..eb1ea726 100644
--- a/sys/Makefile.am
+++ b/sys/Makefile.am
@@ -53,13 +53,13 @@ WININET_DIR=
 endif
 
 if USE_ACM
-ACM_DIR=acmenc
+ACM_DIR=acmenc acmmp3dec
 else
 ACM_DIR=
 endif
 
 SUBDIRS = $(ACM_DIR) $(DVB_DIR) $(FBDEV_DIR) $(OSS4_DIR) $(QT_DIR) $(VCD_DIR) $(WININET_DIR)
 
-DIST_SUBDIRS = acmenc dvb fbdev dshowdecwrapper dshowsrcwrapper dshowvideosink \
+DIST_SUBDIRS = acmenc acmmp3dec dvb fbdev dshowdecwrapper dshowsrcwrapper dshowvideosink \
 			   oss4 qtwrapper vcd wasapi wininet winks winscreencap
 
diff --git a/sys/acmmp3dec/Makefile.am b/sys/acmmp3dec/Makefile.am
new file mode 100644
index 00000000..664816d5
--- /dev/null
+++ b/sys/acmmp3dec/Makefile.am
@@ -0,0 +1,9 @@
+plugin_LTLIBRARIES = libgstacmmp3dec.la
+
+libgstacmdecsink_la_SOURCES = acmmp3dec.c
+libgstacmdecsink_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
+	$(GST_PLUGINS_BASE_CFLAGS)
+libgstacmdecsink_la_LIBADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \
+	-lgstriff-$(GST_MAJORMINOR) -lmsacm32
+libgstacmdecsink_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(DIRECTSOUND_LDFLAGS)
+
diff --git a/sys/acmmp3dec/acmmp3dec.c b/sys/acmmp3dec/acmmp3dec.c
new file mode 100644
index 00000000..fb5d5ba5
--- /dev/null
+++ b/sys/acmmp3dec/acmmp3dec.c
@@ -0,0 +1,375 @@
+/* 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>
+    
+#define ACM_BUFFER_SIZE (64 * 1024)
+    
+#define GST_TYPE_ACM_MP3_DEC \
+    (acmmp3dec_get_type ()) 
+#define GST_ACM_MP3_DEC(obj) \
+    (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_ACM_MP3_DEC, ACMMP3Dec)) 
+ 
+#define GST_CAT_DEFAULT acmmp3dec_debug
+    GST_DEBUG_CATEGORY_STATIC (acmmp3dec_debug);
+
+static const GstElementDetails acmmp3dec_details =
+    
+GST_ELEMENT_DETAILS ("ACM MP3 decoder", 
+"Codec/Decoder/Audio",
+    
+"Decode MP3 using ACM decoder",
+    
+"Pioneers of the Inevitable <songbird@songbirdnest.com");
+
+static GstStaticPadTemplate acmmp3dec_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 acmmp3dec_src_template =
+    
+GST_STATIC_PAD_TEMPLATE ("src", 
+GST_PAD_SRC, 
+GST_PAD_ALWAYS,
+    
+GST_STATIC_CAPS ("audio/mpeg, " 
+ "mpegversion = (int)1, " 
+        "layer = (int)3, " 
+        "rate = (int){ 8000, 11025, 12000, 16000, 22050, 24000, " 
+        "               32000, 44100, 48000 }, " 
+ "channels = (int)[1,2], " 
+        "parsed = (boolean) true") 
+);
+
+typedef struct _ACMMP3DecClass 
+{
+  
+GstElementClass parent_class;
+
+} ACMMP3DecClass;
+
+typedef struct _ACMMP3Dec 
+{
+  
+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;
+ 
+} ACMMP3Dec;
+
+GST_BOILERPLATE (ACMMP3Dec, acmmp3dec, GstElement, GST_TYPE_ELEMENT);
+
+static GstCaps *
+acmmp3dec_caps_from_format (WAVEFORMATEX * fmt) 
+{
+  
+return gst_riff_create_audio_caps (fmt->wFormatTag, 
+NULL,
+      (gst_riff_strf_auds *) fmt, NULL, NULL, NULL);
+
+}
+
+
+gboolean acmmp3dec_set_input_format (ACMMP3Dec * dec) 
+{
+  
+dec->infmt.wfx.wFormatTag = WAVE_FORMAT_MPEGLAYER3;
+  
+dec->infmt.wfx.nChannels = dec->channels;
+  
+dec->infmt.wfx.nSamplesPerSec = dec->rate;
+  
+dec->infmt.wfx.nAvgBytesPerSec = 0;
+  
+dec->infmt.wfx.nBlockAlign = 0;
+  
+dec->infmt.wfx.wBitsPerSample = 16;
+  
+dec->infmt.wfx.cbSize = MPEGLAYER3_WFX_EXTRA_BYTES;
+  
+dec->infmt.wID = MPEGLAYER3_ID_MPEG;
+  
+dec->infmt.fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;   // ??
+  dec->infmt.nBlockSize = 0;    // Damn, need to figure this out... Does this
+  // even make sense for vbr files? Various random
+  // things suggest 417 for no apparent reason?
+  // That's the right value for an unpadded
+  // 128 kbps 44.1kHz stream I think. Let's try
+  // zero to see if it works though. Or one?
+  dec->infmt.nFramesPerBlock = 1;
+  
+dec->infmt.nCodecDelay = 0;  /* Apparently no way to know the correct 
+                                   value to put here! Encoder-specific and not
+                                   stored in the bitstream. */
+  
+return TRUE;
+
+}
+
+
+gboolean acmmp3dec_set_output_format (ACMMP3Dec * dec,
+    WAVEFORMATEX * outfmt) 
+{
+  
+dec->outfmt.wFormatTag = WAVE_FORMAT_PCM;
+  
+dec->outfmt.nChannels = dec->channels;
+  
+dec->outfmt.nSamplesPerSec = dec->rate;
+  
+dec->outfmt.nAvgBytesPerSec = 2 * dec->channels * dec->rate;
+  
+dec->outfmt.nBlockAlign = 4;
+  
+dec->outfmt.wBitsPerSample = 16;
+  
+dec->outfmt.cbSize = 0;
+  
+return TRUE;
+
+}
+
+static gboolean 
+acmmp3dec_setup (ACMMP3Dec * dec) 
+{
+  
+MMRESULT res;
+  
+int destBufferSize;
+
+TODO:Get driverId 
+      
+res = acmDriverOpen (&dec->driver, decclass->driverId, 0);
+  
+if (res) {
+    
+GST_WARNING ("Failed to open ACM driver: %d", res);
+    
+return FALSE;
+  
+}
+  
+acmmp3dec_set_input_format (dec, &dec->infmt);
+  
+acmmp3dec_set_output_format (dec, &dec->outfmt);
+  
+res =
+      acmStreamOpen (&dec->stream, dec->driver, &dec->infmt, dec->outfmt, 
+0, 0,
+      0, ACM_STREAMOPENF_NONREALTIME);
+  
+if (res) {
+    
+GST_WARNING_OBJECT (dec, "Failed to open ACM stream");
+    
+return FALSE;
+  
+}
+  
+dec->header.cbStruct = sizeof (ACMSTREAMHEADER);
+  
+dec->header.fdwStatus = 0;
+  
+dec->header.dwUser = 0;
+  
+dec->header.pbSrc = (BYTE *) g_malloc (ACM_BUFFER_SIZE);
+  
+dec->header.cbSrcLength = ACM_BUFFER_SIZE;
+  
+dec->header.cbSrcLengthUsed = 0;
+  
+dec->header.dwSrcUser = 0;
+  
+      /* Ask what buffer size we need to use for our output */ 
+      acmStreamSize (dec->stream, ACM_BUFFER_SIZE, 
+&destBufferSize,
+      ACM_STREAMSIZEF_SOURCE);
+  
+dec->header.pbDst = (BYTE *) g_malloc (destBufferSize);
+  
+dec->header.cbDstLength = destBufferSize;
+  
+dec->header.cbDstLengthUsed = 0;
+  
+dec->header.dwDstUser = 0;
+  
+res = acmStreamPrepareHeader (dec->stream, &dec->header, 0);
+  
+if (res) {
+    
+GST_WARNING_OBJECT (dec, "Failed to prepare ACM stream: %x", res);
+    
+return FALSE;
+  
+}
+  
+dec->output_caps = acmmp3dec_caps_from_format (dec->outfmt);
+  
+if (dec->output_caps) {
+    
+gst_pad_set_caps (dec->srcpad, dec->output_caps);
+  
+}
+  
+dec->is_setup = TRUE;
+  
+return TRUE;
+
+}
+
+static void 
+acmmp3dec_teardown (ACMMP3Dec * dec) 
+{
+  
+if (dec->outfmt) {
+    
+g_free (dec->outfmt);
+    
+dec->outfmt = NULL;
+  
+}
+  
+if (dec->output_caps) {
+    
+gst_caps_unref (dec->output_caps);
+    
+dec->output_caps = NULL;
+  
+}
+  
+if (dec->header.pbSrc)
+    
+g_free (dec->header.pbSrc);
+  
+if (dec->header.pbDst)
+    
+g_free (dec->header.pbDst);
+  
+memset (&dec->header, 0, sizeof (dec->header));
+  
+if (dec->stream) {
+    
+acmStreamClose (dec->stream, 0);
+    
+dec->stream = 0;
+  
+}
+  
+if (dec->driver) {
+    
+acmDriverClose (dec->driver, 0);
+    
+dec->driver = 0;
+  
+}
+  
+dec->bytes_output = 0;
+  
+dec->offset = 0;
+  
+dec->is_setup = FALSE;
+
+}
+
+static gboolean
+acmmp3dec_sink_setcaps (GstPad * pad, GstCaps * caps) 
+{
+  
+ACMMP3Dec * dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
+  
+GstStructure * structure;
+  
+gboolean ret;
+  
+structure = gst_caps_get_structure (caps, 0);
+  
+gst_structure_get_int (structure, "channels", &dec->channels);
+  
+gst_structure_get_int (structure, "rate", &dec->rate);
+  
+dec->bytes_per_sample = dec->channels * dec->rate * 2;      /* 16 bit output */
+  
+if (dec->is_setup)
+    
+acmmp3dec_teardown (dec);
+  
+ret = acmmp3dec_setup (dec);
+  
+return ret;
+
+}
+
+static GstFlowReturn 
+acmmp3dec_push_output (ACMMP3Dec * dec) 
+{
+  
+GstFlowReturn ret = GST_FLOW_OK;
+  
+if (dec->header.cbDstLengthUsed > 0) {
+    
+GstBuffer * outbuf =
+        gst_buffer_new_and_alloc (dec->header.cbDstLengthUsed);
+    
+memcpy (GST_BUFFER_DATA (outbuf), dec->header.pbDst,
+        
+dec->header.cbDstLengthUsed);
+    
+GST_BUFFER_TIMESTAMP (outbuf) = dec->timestamp;
+    
+GST_BUFFER_DURATION (outbuf) =
+        gst_util_uint64_scale_int (
+GST_BUFFER_SIZE (outbuf), GST_SECOND,
+        dec->bytes_per_sample);
+    
+dec->timestamp += GST_BUFFER_DURATION (outbuf);
+    
+GST_DEBUG_OBJECT (dec, "Pushing %d byte decoded buffer",
+        
+dec->header.cbDstLengthUsed);
+    
+ret = gst_pad_push (dec->srcpad, outbuf);
+  
+}
+  
+return ret;
+
+}
+
+static GstFlowReturn
+acmmp3dec_chain (GstPad * pad, GstBuffer * buf) 
+{
+  
+MMRESULT res;
+  
+ACMMP3Dec * dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
+  
+guchar * data = GST_BUFFER_DATA (buf);
+  
+gint len = GST_BUFFER_SIZE (buf);
+  
+int chunklen;
+  
+GstFlowReturn ret = GST_FLOW_OK;
+  
+if (len > ACM_BUFFER_SIZE) {
+    
+GST_WARNING_OBJECT (dec, "Impossibly large mp3 frame!");
+    
+return GST_FLOW_ERROR;
+  
+}
+  
+if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
+    
+dec->timestamp = GST_BUFFER_TIMESTAMP (buf);
+  
+}
+  
+memcpy (dec->header.pbSrc, data, len);
+  
+dec->header.cbSrcLength = len;
+  
+      /* Now we have a buffer ready to go */ 
+      res =
+      acmStreamConvert (dec->stream, &dec->header,
+      
+ACM_STREAMCONVERTF_BLOCKALIGN);
+  
+if (res) {
+    
+GST_WARNING_OBJECT (dec, "Failed to decode data");
+    
+return GST_FLOW_OK;        /* Maybe it was just a corrupt frame */
+  
+}
+  
+if (dec->header.cbSrcLengthUsed > 0)
+    
+ {
+    
+if (dec->header.cbSrcLengthUsed != dec->header.cbSrcLength) {
+      
+GST_WARNING_OBJECT (dec, "ACM decoder didn't consume all data!");
+      
+          /* We could handle this, but it shouldn't be possible, so don't try
+           * for now */ 
+          return GST_FLOW_ERROR;
+    
+}
+    
+        /* Write out any data produced */ 
+        acmmp3dec_push_output (dec);
+    
+}
+  
+return ret;
+
+}
+
+
+GstFlowReturn acmmp3dec_finish_stream (ACMMP3Dec * dec) 
+{
+  
+MMRESULT res;
+  
+GstFlowReturn ret = GST_FLOW_OK;
+  
+int len;
+  
+dec->header.cbSrcLength = 0;
+  
+      /* Flush out any remaining data internal to the decoder */ 
+      res =
+      acmStreamConvert (dec->stream, &dec->header,
+      
+ACM_STREAMCONVERTF_BLOCKALIGN | ACM_STREAMCONVERTF_END);
+  
+if (res) {
+    
+GST_WARNING_OBJECT (dec, "Failed to decode data");
+    
+return ret;
+  
+}
+  
+ret = acmmp3dec_push_output (dec);
+  
+return ret;
+
+}
+
+static gboolean
+acmmp3dec_sink_event (GstPad * pad, GstEvent * event) 
+{
+  
+ACMMP3Dec * dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
+  
+gboolean res;
+  
+switch (GST_EVENT_TYPE (event)) {
+    
+case GST_EVENT_EOS:
+      
+acmmp3dec_finish_stream (dec);
+      
+res = gst_pad_push_event (dec->srcpad, event);
+      
+break;
+    
+case GST_EVENT_FLUSH_STOP:
+      
+breal;
+    
+default:
+      
+res = gst_pad_push_event (dec->srcpad, event);
+      
+break;
+  
+}
+  
+return res;
+
+}
+
+static void 
+acmmp3dec_dispose (GObject * obj) 
+{
+  
+ACMMP3Dec * dec = (ACMMP3Dec *) obj;
+  
+G_OBJECT_CLASS (parent_class)->dispose (obj);
+
+} 
+static void 
+
+acmmp3dec_init (ACMMP3Dec * dec) 
+{
+  
+dec->sinkpad =
+      gst_pad_new_from_static_template (&acmmp3dec_sink_template, "sink");
+  
+gst_pad_set_setcaps_function (dec->sinkpad,
+      
+GST_DEBUG_FUNCPTR (acmmp3dec_sink_setcaps));
+  
+gst_pad_set_chain_function (dec->sinkpad,
+      
+GST_DEBUG_FUNCPTR (acmmp3dec_chain));
+  
+gst_pad_set_event_function (dec->sinkpad,
+      
+GST_DEBUG_FUNCPTR (acmmp3dec_sink_event));
+  
+gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
+  
+dec->srcpad =
+      gst_pad_new_from_static_template (&acmmp3dec_src_template, "src");
+  
+gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
+
+} 
+static void 
+
+acmmp3dec_class_init (ACMMP3DecClass * klass) 
+{
+  
+GObjectClass * gobjectclass = (GObjectClass *) klass;
+  
+gobjectclass->dispose = acmmp3dec_dispose;
+
+} 
+static void 
+
+acmmp3dec_base_init (ACMMP3DecClass * klass) 
+{
+  
+GstElementClass * element_class = GST_ELEMENT_CLASS (klass);
+  
+gst_element_class_add_pad_template (element_class,
+      
+gst_static_pad_template_get (&acmmp3dec_sink_template));
+  
+gst_element_class_add_pad_template (element_class,
+      
+gst_static_pad_template_get (&acmmp3dec_src_template));
+  
+gst_element_class_set_details (element_class, &acmmp3dec_details);
+
+} 
+static gboolean 
+
+plugin_init (GstPlugin * plugin) 
+{
+  
+GST_DEBUG_CATEGORY_INIT (acmmp3dec_debug, "acmmp3dec", 
+0, "ACM Decoders");
+  
+GST_INFO ("Registering ACM MP3 decoder");
+  
+if (!gst_element_register (plugin, "acmmp3dec", GST_RANK_PRIMARY,
+          
+GST_TYPE_ACM_MP3_DEC)) {
+    
+return FALSE;
+  
+}
+  
+return TRUE;
+
+}
+
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, 
+GST_VERSION_MINOR, 
+"acmmp3dec",
+    
+"ACM MP3 Decoder", 
+plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
+    GST_PACKAGE_ORIGIN_ '
+
+