diff options
Diffstat (limited to 'sys/acmmp3dec')
| -rw-r--r-- | sys/acmmp3dec/Makefile.am | 9 | ||||
| -rw-r--r-- | sys/acmmp3dec/acmmp3dec.c | 375 |
2 files changed, 384 insertions, 0 deletions
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_ '
+
+ |