--- /dev/null
+/* GStreamer\r
+ * Copyright (C) 2008 Pioneers of the Inevitable <songbird@songbirdnest.com>\r
+ *\r
+ * Authors: Michael Smith <msmith@songbirdnest.com>\r
+ *\r
+ * This library is free software; you can redistribute it and/or\r
+ * modify it under the terms of the GNU Library General Public\r
+ * License as published by the Free Software Foundation; either\r
+ * version 2 of the License, or (at your option) any later version.\r
+ *\r
+ * This library is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
+ * Library General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU Library General Public\r
+ * License along with this library; if not, write to the\r
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,\r
+ * Boston, MA 02111-1307, USA.\r
+ */ \r
+ \r
+#ifdef HAVE_CONFIG_H\r
+#include "config.h"\r
+#endif /* \r */
+ \r
+#include <windows.h>\r
+#include <mmreg.h>\r
+#include <msacm.h>\r
+ \r
+#include <gst/gst.h>\r
+#include <gst/riff/riff-media.h>\r
+ \r
+#define ACM_BUFFER_SIZE (64 * 1024)\r
+ \r
+#define GST_TYPE_ACM_MP3_DEC \\r
+ (acmmp3dec_get_type ()) \r
+#define GST_ACM_MP3_DEC(obj) \\r
+ (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_ACM_MP3_DEC, ACMMP3Dec)) \r \r
+#define GST_CAT_DEFAULT acmmp3dec_debug\r
+ GST_DEBUG_CATEGORY_STATIC (acmmp3dec_debug);
+\r\rstatic const GstElementDetails acmmp3dec_details =
+ \rGST_ELEMENT_DETAILS ("ACM MP3 decoder", \r"Codec/Decoder/Audio",
+ \r"Decode MP3 using ACM decoder",
+ \r"Pioneers of the Inevitable <songbird@songbirdnest.com");
+\r\rstatic GstStaticPadTemplate acmmp3dec_sink_template =
+ \rGST_STATIC_PAD_TEMPLATE ("sink", \rGST_PAD_SINK, \rGST_PAD_ALWAYS,
+ \rGST_STATIC_CAPS ("audio/x-raw-int, " \r "depth = (int)16, " \r
+ "width = (int)16, " \r "endianness = (int)" G_STRINGIFY (G_BYTE_ORDER)
+ ", " \r "signed = (boolean)TRUE, " \r "channels = (int) [1,2], " \r
+ "rate = (int)[1, MAX]") \r);
+\r\rstatic GstStaticPadTemplate acmmp3dec_src_template =
+ \rGST_STATIC_PAD_TEMPLATE ("src", \rGST_PAD_SRC, \rGST_PAD_ALWAYS,
+ \rGST_STATIC_CAPS ("audio/mpeg, " \r "mpegversion = (int)1, " \r
+ "layer = (int)3, " \r
+ "rate = (int){ 8000, 11025, 12000, 16000, 22050, 24000, " \r
+ " 32000, 44100, 48000 }, " \r "channels = (int)[1,2], " \r
+ "parsed = (boolean) true") \r);
+\r\rtypedef struct _ACMMP3DecClass \r
+{
+ \rGstElementClass parent_class;
+\r} ACMMP3DecClass;
+\r\rtypedef struct _ACMMP3Dec \r
+{
+ \rGstElement parent;
+ \r\rGstPad * sinkpad;
+ \rGstPad * srcpad;
+ \r\rgboolean is_setup;
+ \r\rWAVEFORMATEX infmt;
+ \rWAVEFORMATEX * outfmt;
+ \r\rHACMDRIVER driver;
+ \rHACMSTREAM stream;
+ \rACMSTREAMHEADER header;
+ \r\r
+ /* Offset into input buffer to write next data */ \r
+ int offset;
+ \r
+ /* Number of bytes written */ \r
+ int bytes_output;
+ \r\r
+ /* From received caps */ \r
+ int rate;
+ \rint channels;
+ \r\r
+ /* Set in properties */ \r
+ int selected_bitrate;
+ \r\rGstCaps * output_caps;
+ \r} ACMMP3Dec;
+\r\rGST_BOILERPLATE (ACMMP3Dec, acmmp3dec, GstElement, GST_TYPE_ELEMENT);
+\r\rstatic GstCaps *\r
+acmmp3dec_caps_from_format (WAVEFORMATEX * fmt) \r
+{
+ \rreturn gst_riff_create_audio_caps (fmt->wFormatTag, \rNULL,
+ (gst_riff_strf_auds *) fmt, NULL, NULL, NULL);
+\r}
+
+\r\rgboolean acmmp3dec_set_input_format (ACMMP3Dec * dec) \r
+{
+ \rdec->infmt.wfx.wFormatTag = WAVE_FORMAT_MPEGLAYER3;
+ \rdec->infmt.wfx.nChannels = dec->channels;
+ \rdec->infmt.wfx.nSamplesPerSec = dec->rate;
+ \rdec->infmt.wfx.nAvgBytesPerSec = 0;
+ \rdec->infmt.wfx.nBlockAlign = 0;
+ \rdec->infmt.wfx.wBitsPerSample = 16;
+ \rdec->infmt.wfx.cbSize = MPEGLAYER3_WFX_EXTRA_BYTES;
+ \rdec->infmt.wID = MPEGLAYER3_ID_MPEG;
+ \rdec->infmt.fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF; // ??\r
+ dec->infmt.nBlockSize = 0; // Damn, need to figure this out... Does this\r
+ // even make sense for vbr files? Various random\r
+ // things suggest 417 for no apparent reason?\r
+ // That's the right value for an unpadded\r
+ // 128 kbps 44.1kHz stream I think. Let's try\r
+ // zero to see if it works though. Or one?\r
+ dec->infmt.nFramesPerBlock = 1;
+ \rdec->infmt.nCodecDelay = 0; /* Apparently no way to know the correct \r
+ value to put here! Encoder-specific and not\r
+ stored in the bitstream. */
+ \r\rreturn TRUE;
+\r}
+
+\r\rgboolean acmmp3dec_set_output_format (ACMMP3Dec * dec,
+ WAVEFORMATEX * outfmt) \r
+{
+ \rdec->outfmt.wFormatTag = WAVE_FORMAT_PCM;
+ \rdec->outfmt.nChannels = dec->channels;
+ \rdec->outfmt.nSamplesPerSec = dec->rate;
+ \rdec->outfmt.nAvgBytesPerSec = 2 * dec->channels * dec->rate;
+ \rdec->outfmt.nBlockAlign = 4;
+ \rdec->outfmt.wBitsPerSample = 16;
+ \rdec->outfmt.cbSize = 0;
+ \r\rreturn TRUE;
+\r}
+\r\rstatic gboolean \r
+acmmp3dec_setup (ACMMP3Dec * dec) \r
+{
+ \rMMRESULT res;
+ \rint destBufferSize;
+\r\rTODO:Get driverId \r
+ \rres = acmDriverOpen (&dec->driver, decclass->driverId, 0);
+ \rif (res) {
+ \rGST_WARNING ("Failed to open ACM driver: %d", res);
+ \rreturn FALSE;
+ \r}
+ \r\racmmp3dec_set_input_format (dec, &dec->infmt);
+ \racmmp3dec_set_output_format (dec, &dec->outfmt);
+ \r\rres =
+ acmStreamOpen (&dec->stream, dec->driver, &dec->infmt, dec->outfmt, \r0, 0,
+ 0, ACM_STREAMOPENF_NONREALTIME);
+ \rif (res) {
+ \rGST_WARNING_OBJECT (dec, "Failed to open ACM stream");
+ \rreturn FALSE;
+ \r}
+ \r\rdec->header.cbStruct = sizeof (ACMSTREAMHEADER);
+ \rdec->header.fdwStatus = 0;
+ \rdec->header.dwUser = 0;
+ \r\rdec->header.pbSrc = (BYTE *) g_malloc (ACM_BUFFER_SIZE);
+ \rdec->header.cbSrcLength = ACM_BUFFER_SIZE;
+ \rdec->header.cbSrcLengthUsed = 0;
+ \rdec->header.dwSrcUser = 0;
+ \r\r
+ /* Ask what buffer size we need to use for our output */ \r
+ acmStreamSize (dec->stream, ACM_BUFFER_SIZE, \r&destBufferSize,
+ ACM_STREAMSIZEF_SOURCE);
+ \r\rdec->header.pbDst = (BYTE *) g_malloc (destBufferSize);
+ \rdec->header.cbDstLength = destBufferSize;
+ \rdec->header.cbDstLengthUsed = 0;
+ \rdec->header.dwDstUser = 0;
+ \r\rres = acmStreamPrepareHeader (dec->stream, &dec->header, 0);
+ \rif (res) {
+ \rGST_WARNING_OBJECT (dec, "Failed to prepare ACM stream: %x", res);
+ \rreturn FALSE;
+ \r}
+ \r\rdec->output_caps = acmmp3dec_caps_from_format (dec->outfmt);
+ \rif (dec->output_caps) {
+ \rgst_pad_set_caps (dec->srcpad, dec->output_caps);
+ \r}
+ \r\rdec->is_setup = TRUE;
+ \rreturn TRUE;
+\r}
+\r\rstatic void \r
+acmmp3dec_teardown (ACMMP3Dec * dec) \r
+{
+ \rif (dec->outfmt) {
+ \rg_free (dec->outfmt);
+ \rdec->outfmt = NULL;
+ \r}
+ \r\rif (dec->output_caps) {
+ \rgst_caps_unref (dec->output_caps);
+ \rdec->output_caps = NULL;
+ \r}
+ \r\rif (dec->header.pbSrc)
+ \rg_free (dec->header.pbSrc);
+ \rif (dec->header.pbDst)
+ \rg_free (dec->header.pbDst);
+ \rmemset (&dec->header, 0, sizeof (dec->header));
+ \r\rif (dec->stream) {
+ \racmStreamClose (dec->stream, 0);
+ \rdec->stream = 0;
+ \r}
+ \rif (dec->driver) {
+ \racmDriverClose (dec->driver, 0);
+ \rdec->driver = 0;
+ \r}
+ \r\rdec->bytes_output = 0;
+ \rdec->offset = 0;
+ \rdec->is_setup = FALSE;
+\r}
+\r\rstatic gboolean
+acmmp3dec_sink_setcaps (GstPad * pad, GstCaps * caps) \r
+{
+ \rACMMP3Dec * dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
+ \rGstStructure * structure;
+ \rgboolean ret;
+ \r\rstructure = gst_caps_get_structure (caps, 0);
+ \rgst_structure_get_int (structure, "channels", &dec->channels);
+ \rgst_structure_get_int (structure, "rate", &dec->rate);
+ \r\rdec->bytes_per_sample = dec->channels * dec->rate * 2; /* 16 bit output */
+ \r\rif (dec->is_setup)
+ \racmmp3dec_teardown (dec);
+ \rret = acmmp3dec_setup (dec);
+ \r\rreturn ret;
+\r}
+\r\rstatic GstFlowReturn \r
+acmmp3dec_push_output (ACMMP3Dec * dec) \r
+{
+ \rGstFlowReturn ret = GST_FLOW_OK;
+ \r\rif (dec->header.cbDstLengthUsed > 0) {
+ \rGstBuffer * outbuf =
+ gst_buffer_new_and_alloc (dec->header.cbDstLengthUsed);
+ \rmemcpy (GST_BUFFER_DATA (outbuf), dec->header.pbDst,
+ \rdec->header.cbDstLengthUsed);
+ \r\rGST_BUFFER_TIMESTAMP (outbuf) = dec->timestamp;
+ \rGST_BUFFER_DURATION (outbuf) =
+ gst_util_uint64_scale_int (\rGST_BUFFER_SIZE (outbuf), GST_SECOND,
+ dec->bytes_per_sample);
+ \r\rdec->timestamp += GST_BUFFER_DURATION (outbuf);
+ \r\rGST_DEBUG_OBJECT (dec, "Pushing %d byte decoded buffer",
+ \rdec->header.cbDstLengthUsed);
+ \rret = gst_pad_push (dec->srcpad, outbuf);
+ \r}
+ \r\rreturn ret;
+\r}
+\r\rstatic GstFlowReturn
+acmmp3dec_chain (GstPad * pad, GstBuffer * buf) \r
+{
+ \rMMRESULT res;
+ \rACMMP3Dec * dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
+ \rguchar * data = GST_BUFFER_DATA (buf);
+ \rgint len = GST_BUFFER_SIZE (buf);
+ \rint chunklen;
+ \rGstFlowReturn ret = GST_FLOW_OK;
+ \r\rif (len > ACM_BUFFER_SIZE) {
+ \rGST_WARNING_OBJECT (dec, "Impossibly large mp3 frame!");
+ \rreturn GST_FLOW_ERROR;
+ \r}
+ \r\rif (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
+ \rdec->timestamp = GST_BUFFER_TIMESTAMP (buf);
+ \r}
+ \r\rmemcpy (dec->header.pbSrc, data, len);
+ \rdec->header.cbSrcLength = len;
+ \r\r
+ /* Now we have a buffer ready to go */ \r
+ res =
+ acmStreamConvert (dec->stream, &dec->header,
+ \rACM_STREAMCONVERTF_BLOCKALIGN);
+ \rif (res) {
+ \rGST_WARNING_OBJECT (dec, "Failed to decode data");
+ \rreturn GST_FLOW_OK; /* Maybe it was just a corrupt frame */
+ \r}
+ \r\rif (dec->header.cbSrcLengthUsed > 0)
+ \r {
+ \rif (dec->header.cbSrcLengthUsed != dec->header.cbSrcLength) {
+ \rGST_WARNING_OBJECT (dec, "ACM decoder didn't consume all data!");
+ \r
+ /* We could handle this, but it shouldn't be possible, so don't try\r
+ * for now */ \r
+ return GST_FLOW_ERROR;
+ \r}
+ \r\r
+ /* Write out any data produced */ \r
+ acmmp3dec_push_output (dec);
+ \r}
+ \rreturn ret;
+\r}
+
+\r\rGstFlowReturn acmmp3dec_finish_stream (ACMMP3Dec * dec) \r
+{
+ \rMMRESULT res;
+ \rGstFlowReturn ret = GST_FLOW_OK;
+ \rint len;
+ \r\rdec->header.cbSrcLength = 0;
+ \r\r
+ /* Flush out any remaining data internal to the decoder */ \r
+ res =
+ acmStreamConvert (dec->stream, &dec->header,
+ \rACM_STREAMCONVERTF_BLOCKALIGN | ACM_STREAMCONVERTF_END);
+ \rif (res) {
+ \rGST_WARNING_OBJECT (dec, "Failed to decode data");
+ \rreturn ret;
+ \r}
+ \r\rret = acmmp3dec_push_output (dec);
+ \rreturn ret;
+\r}
+\r\rstatic gboolean
+acmmp3dec_sink_event (GstPad * pad, GstEvent * event) \r
+{
+ \rACMMP3Dec * dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
+ \rgboolean res;
+ \r\rswitch (GST_EVENT_TYPE (event)) {
+ \rcase GST_EVENT_EOS:
+ \racmmp3dec_finish_stream (dec);
+ \r\rres = gst_pad_push_event (dec->srcpad, event);
+ \rbreak;
+ \rcase GST_EVENT_FLUSH_STOP:
+ \rbreal;
+ \rdefault:
+ \rres = gst_pad_push_event (dec->srcpad, event);
+ \rbreak;
+ \r}
+ \r\rreturn res;
+\r}
+\r\rstatic void \r
+acmmp3dec_dispose (GObject * obj) \r
+{
+ \rACMMP3Dec * dec = (ACMMP3Dec *) obj;
+ \r\rG_OBJECT_CLASS (parent_class)->dispose (obj);
+\r} \r\rstatic void \r
+
+acmmp3dec_init (ACMMP3Dec * dec) \r
+{
+ \rdec->sinkpad =
+ gst_pad_new_from_static_template (&acmmp3dec_sink_template, "sink");
+ \rgst_pad_set_setcaps_function (dec->sinkpad,
+ \rGST_DEBUG_FUNCPTR (acmmp3dec_sink_setcaps));
+ \rgst_pad_set_chain_function (dec->sinkpad,
+ \rGST_DEBUG_FUNCPTR (acmmp3dec_chain));
+ \rgst_pad_set_event_function (dec->sinkpad,
+ \rGST_DEBUG_FUNCPTR (acmmp3dec_sink_event));
+ \rgst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
+ \r\rdec->srcpad =
+ gst_pad_new_from_static_template (&acmmp3dec_src_template, "src");
+ \rgst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
+\r\r} \r\rstatic void \r
+
+acmmp3dec_class_init (ACMMP3DecClass * klass) \r
+{
+ \rGObjectClass * gobjectclass = (GObjectClass *) klass;
+ \rgobjectclass->dispose = acmmp3dec_dispose;
+\r} \r\rstatic void \r
+
+acmmp3dec_base_init (ACMMP3DecClass * klass) \r
+{
+ \rGstElementClass * element_class = GST_ELEMENT_CLASS (klass);
+ \r\rgst_element_class_add_pad_template (element_class,
+ \rgst_static_pad_template_get (&acmmp3dec_sink_template));
+ \rgst_element_class_add_pad_template (element_class,
+ \rgst_static_pad_template_get (&acmmp3dec_src_template));
+ \rgst_element_class_set_details (element_class, &acmmp3dec_details);
+\r} \r\rstatic gboolean \r
+
+plugin_init (GstPlugin * plugin) \r
+{
+ \rGST_DEBUG_CATEGORY_INIT (acmmp3dec_debug, "acmmp3dec", \r0, "ACM Decoders");
+ \r\rGST_INFO ("Registering ACM MP3 decoder");
+ \rif (!gst_element_register (plugin, "acmmp3dec", GST_RANK_PRIMARY,
+ \rGST_TYPE_ACM_MP3_DEC)) {
+ \rreturn FALSE;
+ \r}
+ \r\rreturn TRUE;
+\r}
+
+\r\rGST_PLUGIN_DEFINE (GST_VERSION_MAJOR, \rGST_VERSION_MINOR, \r"acmmp3dec",
+ \r"ACM MP3 Decoder", \rplugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
+ GST_PACKAGE_ORIGIN_ '\r
+\r
+
projects / platform / upstream / gstreamer.git / commitdiff