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gstreamer/sys/acmmp3dec/acmmp3dec.c
Michael Smith a485e4c252 Add new directory for new acmmp3dec plugin 
Original commit message from CVS:
* configure.ac:
* sys/Makefile.am:
Add new directory for new acmmp3dec plugin
* sys/acmenc/Makefile.am:
* sys/acmenc/acmmp3dec.c:
Add new acmmp3dec plugin, which uses ACM for decoding mp3 on windows.
2008-11-25 00:20:22 +00:00

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/* 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_ '
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