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gstreamer/ext/modplug/gstmodplug.cc
Mathieu Duponchelle 42adb02a10 docstrings: port ulinks to markdown links
2019-08-23 20:14:12 +02:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
Code based on modplugxmms
XMMS plugin:
Kenton Varda <temporal@gauge3d.org>
Sound Engine:
Olivier Lapicque <olivierl@jps.net>
*/
/**
* SECTION:element-modplug
*
* Modplug uses the [modplug](http://modplug-xmms.sourceforge.net/) library to
* decode tracked music in the MOD/S3M/XM/IT and related formats.
*
* ## Example pipeline
*
* |[
* gst-launch-1.0 -v filesrc location=1990s-nostalgia.xm ! modplug ! audioconvert ! alsasink
* ]| Play a FastTracker xm file.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Required to not get an undefined warning
* https://bugzilla.gnome.org/show_bug.cgi?id=613795
*/
#ifndef WORDS_BIGENDIAN
#define WORDS_BIGENDIAN 0
#endif
#include <libmodplug/stdafx.h>
#include <libmodplug/sndfile.h>
#include "gstmodplug.h"
#include <gst/gst.h>
#include <stdlib.h>
#include <gst/audio/audio.h>
GST_DEBUG_CATEGORY_STATIC (modplug_debug);
#define GST_CAT_DEFAULT modplug_debug
enum
{
ARG_0,
ARG_SONGNAME,
ARG_REVERB,
ARG_REVERB_DEPTH,
ARG_REVERB_DELAY,
ARG_MEGABASS,
ARG_MEGABASS_AMOUNT,
ARG_MEGABASS_RANGE,
ARG_NOISE_REDUCTION,
ARG_SURROUND,
ARG_SURROUND_DEPTH,
ARG_SURROUND_DELAY,
ARG_OVERSAMP
};
#define DEFAULT_REVERB FALSE
#define DEFAULT_REVERB_DEPTH 30
#define DEFAULT_REVERB_DELAY 100
#define DEFAULT_MEGABASS FALSE
#define DEFAULT_MEGABASS_AMOUNT 40
#define DEFAULT_MEGABASS_RANGE 30
#define DEFAULT_SURROUND TRUE
#define DEFAULT_SURROUND_DEPTH 20
#define DEFAULT_SURROUND_DELAY 20
#define DEFAULT_OVERSAMP TRUE
#define DEFAULT_NOISE_REDUCTION TRUE
#define FORMATS "{ " GST_AUDIO_NE (S32) ", " GST_AUDIO_NE (S16) ", U8 }"
static GstStaticPadTemplate modplug_src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw,"
" format = (string) " FORMATS ", "
" layout = (string) interleaved, "
" rate = (int) { 8000, 11025, 22050, 44100 },"
" channels = (int) [ 1, 2 ]"));
static GstStaticPadTemplate modplug_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-mod; audio/x-xm; audio/x-it; audio/x-s3m; "
"audio/x-stm"));
static void gst_modplug_dispose (GObject * object);
static void gst_modplug_set_property (GObject * object,
guint id, const GValue * value, GParamSpec * pspec);
static void gst_modplug_get_property (GObject * object,
guint id, GValue * value, GParamSpec * pspec);
static gboolean gst_modplug_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_modplug_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstStateChangeReturn gst_modplug_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_modplug_sinkpad_activate (GstPad * pad, GstObject * parent);
static gboolean gst_modplug_sinkpad_activate_mode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active);
static void gst_modplug_loop (GstModPlug * element);
#define parent_class gst_modplug_parent_class
G_DEFINE_TYPE (GstModPlug, gst_modplug, GST_TYPE_ELEMENT);
static void
gst_modplug_class_init (GstModPlugClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_modplug_set_property;
gobject_class->get_property = gst_modplug_get_property;
gobject_class->dispose = gst_modplug_dispose;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SONGNAME,
g_param_spec_string ("songname", "Songname", "The song name",
NULL, (GParamFlags) (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_REVERB,
g_param_spec_boolean ("reverb", "reverb", "Reverb",
DEFAULT_REVERB,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_REVERB_DEPTH,
g_param_spec_int ("reverb-depth", "reverb depth", "Reverb depth",
0, 100, DEFAULT_REVERB_DEPTH,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_REVERB_DELAY,
g_param_spec_int ("reverb-delay", "reverb delay", "Reverb delay",
0, 200, DEFAULT_REVERB_DELAY,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MEGABASS,
g_param_spec_boolean ("megabass", "megabass", "Megabass",
DEFAULT_MEGABASS,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MEGABASS_AMOUNT,
g_param_spec_int ("megabass-amount", "megabass amount", "Megabass amount",
0, 100, DEFAULT_MEGABASS_AMOUNT,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MEGABASS_RANGE,
g_param_spec_int ("megabass-range", "megabass range", "Megabass range",
0, 100, DEFAULT_MEGABASS_RANGE,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SURROUND,
g_param_spec_boolean ("surround", "surround", "Surround",
DEFAULT_SURROUND,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SURROUND_DEPTH,
g_param_spec_int ("surround-depth", "surround depth", "Surround depth",
0, 100, DEFAULT_SURROUND_DEPTH,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SURROUND_DELAY,
g_param_spec_int ("surround-delay", "surround delay", "Surround delay",
0, 40, DEFAULT_SURROUND_DELAY,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_OVERSAMP,
g_param_spec_boolean ("oversamp", "oversamp", "oversamp",
DEFAULT_OVERSAMP,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NOISE_REDUCTION,
g_param_spec_boolean ("noise-reduction", "noise reduction",
"noise reduction", DEFAULT_NOISE_REDUCTION,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
gstelement_class->change_state = gst_modplug_change_state;
gst_element_class_add_static_pad_template (gstelement_class, &modplug_sink_template_factory);
gst_element_class_add_static_pad_template (gstelement_class, &modplug_src_template_factory);
gst_element_class_set_static_metadata (gstelement_class, "ModPlug",
"Codec/Decoder/Audio", "Module decoder based on modplug engine",
"Jeremy SIMON <jsimon13@yahoo.fr>");
GST_DEBUG_CATEGORY_INIT (modplug_debug, "modplug", 0, "ModPlug element");
}
static void
gst_modplug_init (GstModPlug * modplug)
{
/* create the sink and src pads */
modplug->sinkpad =
gst_pad_new_from_static_template (&modplug_sink_template_factory, "sink");
gst_pad_set_activate_function (modplug->sinkpad,
GST_DEBUG_FUNCPTR (gst_modplug_sinkpad_activate));
gst_pad_set_activatemode_function (modplug->sinkpad,
GST_DEBUG_FUNCPTR (gst_modplug_sinkpad_activate_mode));
gst_element_add_pad (GST_ELEMENT (modplug), modplug->sinkpad);
modplug->srcpad =
gst_pad_new_from_static_template (&modplug_src_template_factory, "src");
gst_pad_set_event_function (modplug->srcpad,
GST_DEBUG_FUNCPTR (gst_modplug_src_event));
gst_pad_set_query_function (modplug->srcpad,
GST_DEBUG_FUNCPTR (gst_modplug_src_query));
gst_element_add_pad (GST_ELEMENT (modplug), modplug->srcpad);
modplug->reverb = DEFAULT_REVERB;
modplug->reverb_depth = DEFAULT_REVERB_DEPTH;
modplug->reverb_delay = DEFAULT_REVERB_DELAY;
modplug->megabass = DEFAULT_MEGABASS;
modplug->megabass_amount = DEFAULT_MEGABASS_AMOUNT;
modplug->megabass_range = DEFAULT_MEGABASS_RANGE;
modplug->surround = DEFAULT_SURROUND;
modplug->surround_depth = DEFAULT_SURROUND_DEPTH;
modplug->surround_delay = DEFAULT_SURROUND_DELAY;
modplug->oversamp = DEFAULT_OVERSAMP;
modplug->noise_reduction = DEFAULT_NOISE_REDUCTION;
modplug->bits = 16;
modplug->channel = 2;
modplug->frequency = 44100;
}
static void
gst_modplug_dispose (GObject * object)
{
GstModPlug *modplug = GST_MODPLUG (object);
G_OBJECT_CLASS (parent_class)->dispose (object);
if (modplug->buffer) {
gst_buffer_unref (modplug->buffer);
modplug->buffer = NULL;
}
}
static gboolean
gst_modplug_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstModPlug *modplug;
gboolean res = FALSE;
modplug = GST_MODPLUG (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
if (!modplug->mSoundFile)
goto done;
gst_query_parse_duration (query, &format, NULL);
if (format == GST_FORMAT_TIME) {
gst_query_set_duration (query, format, modplug->song_length);
res = TRUE;
}
}
break;
case GST_QUERY_POSITION:
{
GstFormat format;
if (!modplug->mSoundFile)
goto done;
gst_query_parse_position (query, &format, NULL);
if (format == GST_FORMAT_TIME) {
gint64 pos;
pos = (modplug->song_length * modplug->mSoundFile->GetCurrentPos ());
pos /= modplug->mSoundFile->GetMaxPosition ();
gst_query_set_position (query, format, pos);
res = TRUE;
}
}
break;
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
done:
return res;
}
static gboolean
gst_modplug_do_seek (GstModPlug * modplug, GstEvent * event)
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gboolean flush;
gint64 cur, stop;
GstSegment seg;
if (modplug->frequency == 0)
goto no_song;
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
if (format != GST_FORMAT_TIME)
goto no_time;
/* FIXME: we should be using GstSegment for all this */
if (cur_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE)
goto not_supported;
if (stop_type == GST_SEEK_TYPE_NONE)
stop = GST_CLOCK_TIME_NONE;
if (!GST_CLOCK_TIME_IS_VALID (stop) && modplug->song_length > 0)
stop = modplug->song_length;
cur = CLAMP (cur, -1, modplug->song_length);
GST_DEBUG_OBJECT (modplug, "seek to %" GST_TIME_FORMAT,
GST_TIME_ARGS ((guint64) cur));
modplug->seek_at = cur;
flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
if (flush) {
gst_pad_push_event (modplug->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (modplug->sinkpad);
}
GST_PAD_STREAM_LOCK (modplug->sinkpad);
if (flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (modplug),
gst_message_new_segment_start (GST_OBJECT (modplug), format, cur));
}
if (flush) {
gst_pad_push_event (modplug->srcpad, gst_event_new_flush_stop (TRUE));
}
GST_LOG_OBJECT (modplug, "sending newsegment from %" GST_TIME_FORMAT "-%"
GST_TIME_FORMAT ", pos=%" GST_TIME_FORMAT,
GST_TIME_ARGS ((guint64) cur), GST_TIME_ARGS ((guint64) stop),
GST_TIME_ARGS ((guint64) cur));
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.rate = rate;
seg.start = cur;
seg.stop = stop;
seg.time = cur;
gst_pad_push_event (modplug->srcpad, gst_event_new_segment (&seg));
modplug->offset =
gst_util_uint64_scale_int (cur, modplug->frequency, GST_SECOND);
gst_pad_start_task (modplug->sinkpad,
(GstTaskFunction) gst_modplug_loop, modplug, NULL);
GST_PAD_STREAM_UNLOCK (modplug->sinkpad);
return TRUE;
/* ERROR */
no_song:
{
GST_DEBUG_OBJECT (modplug, "no song loaded yet");
return FALSE;
}
no_time:
{
GST_DEBUG_OBJECT (modplug, "seeking is only supported in TIME format");
return FALSE;
}
not_supported:
{
GST_DEBUG_OBJECT (modplug, "unsupported seek type");
return FALSE;
}
}
static gboolean
gst_modplug_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstModPlug *modplug;
gboolean res = FALSE;
modplug = GST_MODPLUG (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
res = gst_modplug_do_seek (modplug, event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static gboolean
gst_modplug_load_song (GstModPlug * modplug)
{
GstCaps *newcaps;
GstStructure *structure;
GstMapInfo map;
const gchar *format;
GST_DEBUG_OBJECT (modplug, "Setting caps");
/* negotiate srcpad caps */
if ((newcaps = gst_pad_get_allowed_caps (modplug->srcpad)) == NULL) {
newcaps = gst_pad_get_pad_template_caps (modplug->srcpad);
}
newcaps = gst_caps_make_writable (newcaps);
GST_DEBUG_OBJECT (modplug, "allowed caps %" GST_PTR_FORMAT, newcaps);
structure = gst_caps_get_structure (newcaps, 0);
if (!gst_structure_fixate_field_string (structure, "format",
GST_AUDIO_NE (S16)))
GST_WARNING_OBJECT (modplug, "Failed to fixate format to S16NE");
if (!gst_structure_fixate_field_nearest_int (structure, "rate", 44100))
GST_WARNING_OBJECT (modplug, "Failed to fixate rate to 44100");
if (!gst_structure_fixate_field_nearest_int (structure, "channels", 2))
GST_WARNING_OBJECT (modplug,
"Failed to fixate number of channels to stereo");
GST_DEBUG_OBJECT (modplug, "normalized caps %" GST_PTR_FORMAT, newcaps);
newcaps = gst_caps_fixate (newcaps);
GST_DEBUG_OBJECT (modplug, "fixated caps %" GST_PTR_FORMAT, newcaps);
/* set up modplug to output the negotiated format */
structure = gst_caps_get_structure (newcaps, 0);
format = gst_structure_get_string (structure, "format");
if (g_str_equal (format, GST_AUDIO_NE (S32)))
modplug->bits = 32;
else if (g_str_equal (format, GST_AUDIO_NE (S16)))
modplug->bits = 16;
else
modplug->bits = 8;
gst_structure_get_int (structure, "channels", &modplug->channel);
gst_structure_get_int (structure, "rate", &modplug->frequency);
GST_DEBUG_OBJECT (modplug,
"Audio settings: %d bits, %d channel(s), %d Hz sampling rate",
modplug->bits, modplug->channel, modplug->frequency);
gst_pad_set_caps (modplug->srcpad, newcaps);
gst_caps_unref (newcaps);
modplug->read_samples = 1152;
modplug->read_bytes =
modplug->read_samples * modplug->channel * modplug->bits / 8;
GST_DEBUG_OBJECT (modplug, "Loading song");
modplug->mSoundFile = new CSoundFile;
modplug->mSoundFile->SetWaveConfig (modplug->frequency, modplug->bits,
modplug->channel);
modplug->mSoundFile->SetWaveConfigEx (modplug->surround, !modplug->oversamp,
modplug->reverb, true, modplug->megabass, modplug->noise_reduction, true);
modplug->mSoundFile->SetResamplingMode (SRCMODE_POLYPHASE);
if (modplug->surround)
modplug->mSoundFile->SetSurroundParameters (modplug->surround_depth,
modplug->surround_delay);
if (modplug->megabass)
modplug->mSoundFile->SetXBassParameters (modplug->megabass_amount,
modplug->megabass_range);
if (modplug->reverb)
modplug->mSoundFile->SetReverbParameters (modplug->reverb_depth,
modplug->reverb_delay);
gst_buffer_map (modplug->buffer, &map, GST_MAP_READ);
if (!modplug->mSoundFile->Create (map.data, modplug->song_size))
goto load_error;
gst_buffer_unmap (modplug->buffer, &map);
modplug->song_length = modplug->mSoundFile->GetSongTime () * GST_SECOND;
modplug->seek_at = -1;
GST_INFO_OBJECT (modplug, "Song length: %" GST_TIME_FORMAT,
GST_TIME_ARGS ((guint64) modplug->song_length));
return TRUE;
/* ERRORS */
load_error:
{
gst_buffer_unmap (modplug->buffer, &map);
GST_ELEMENT_ERROR (modplug, STREAM, DECODE, (NULL),
("Unable to load song"));
return FALSE;
}
}
static gboolean
gst_modplug_sinkpad_activate (GstPad * sinkpad, GstObject * parent)
{
GstQuery *query;
gboolean pull_mode;
query = gst_query_new_scheduling ();
if (!gst_pad_peer_query (sinkpad, query)) {
gst_query_unref (query);
goto activate_push;
}
pull_mode = gst_query_has_scheduling_mode_with_flags (query,
GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
gst_query_unref (query);
if (!pull_mode)
goto activate_push;
GST_DEBUG_OBJECT (sinkpad, "activating pull");
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
activate_push:
{
GST_DEBUG_OBJECT (sinkpad, "activating push");
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
}
}
static gboolean
gst_modplug_sinkpad_activate_mode (GstPad * pad, GstObject * parent,
GstPadMode mode, gboolean active)
{
GstModPlug *modplug = GST_MODPLUG (parent);
gboolean res;
switch (mode) {
case GST_PAD_MODE_PUSH:
res = TRUE;
break;
case GST_PAD_MODE_PULL:
if (active) {
res = gst_pad_start_task (pad, (GstTaskFunction) gst_modplug_loop,
modplug, NULL);
} else {
res = gst_pad_stop_task (pad);
}
break;
default:
res = FALSE;
break;
}
return res;
}
static gboolean
gst_modplug_get_upstream_size (GstModPlug * modplug, gint64 * length)
{
gboolean res = FALSE;
GstPad *peer;
peer = gst_pad_get_peer (modplug->sinkpad);
if (peer == NULL)
return FALSE;
if (gst_pad_query_duration (peer, GST_FORMAT_BYTES, length) && *length >= 0) {
res = TRUE;
}
gst_object_unref (peer);
return res;
}
static void
gst_modplug_loop (GstModPlug * modplug)
{
GstFlowReturn flow;
GstBuffer *out = NULL;
GstMapInfo map;
g_assert (GST_IS_MODPLUG (modplug));
/* first, get the size of the song */
if (!modplug->song_size) {
if (!gst_modplug_get_upstream_size (modplug, &modplug->song_size)) {
GST_ELEMENT_ERROR (modplug, STREAM, DECODE, (NULL),
("Unable to load song"));
goto pause;
}
if (modplug->buffer) {
gst_buffer_unref (modplug->buffer);
}
modplug->buffer = gst_buffer_new_and_alloc (modplug->song_size);
modplug->offset = 0;
}
/* read in the song data */
if (!modplug->mSoundFile) {
GstBuffer *buffer = NULL;
guint64 read_size = modplug->song_size - modplug->offset;
if (read_size > 4096)
read_size = 4096;
flow =
gst_pad_pull_range (modplug->sinkpad, modplug->offset, read_size,
&buffer);
if (flow != GST_FLOW_OK) {
GST_ELEMENT_ERROR (modplug, STREAM, DECODE, (NULL),
("Unable to load song"));
goto pause;
}
/* GST_LOG_OBJECT (modplug, "Read %u bytes", GST_BUFFER_SIZE (buffer)); */
gst_buffer_map (buffer, &map, GST_MAP_READ);
gst_buffer_fill (modplug->buffer, modplug->offset, map.data, map.size);
gst_buffer_unmap (buffer, &map);
gst_buffer_unref (buffer);
modplug->offset += read_size;
/* actually load it */
if (modplug->offset == modplug->song_size) {
GstTagList *tags;
gboolean ok;
#define COMMENT_SIZE 16384
gchar comment[COMMENT_SIZE];
GstSegment seg;
ok = gst_modplug_load_song (modplug);
gst_buffer_unref (modplug->buffer);
modplug->buffer = NULL;
modplug->offset = 0;
if (!ok) {
goto pause;
}
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.stop = modplug->song_length;
gst_pad_push_event (modplug->srcpad, gst_event_new_segment (&seg));
/* get and send metadata */
tags = gst_tag_list_new_empty ();
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND,
GST_TAG_TITLE, modplug->mSoundFile->GetTitle (),
GST_TAG_BEATS_PER_MINUTE,
(gdouble) modplug->mSoundFile->GetMusicTempo (), NULL);
if (modplug->mSoundFile->GetSongComments ((gchar *) & comment,
COMMENT_SIZE, 32)) {
comment[COMMENT_SIZE - 1] = '\0';
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND,
GST_TAG_COMMENT, comment, NULL);
}
gst_pad_push_event (modplug->srcpad, gst_event_new_tag (tags));
} else {
/* not fully loaded yet */
return;
}
}
/* could move this to gst_modplug_src_event
* if libmodplug was definitely thread safe.. */
if (modplug->seek_at != -1) {
gint seek_to_pos;
gfloat temp;
temp = (gfloat) modplug->song_length / modplug->seek_at;
seek_to_pos = (gint) (modplug->mSoundFile->GetMaxPosition () / temp);
GST_DEBUG_OBJECT (modplug, "Seeking to row %d", seek_to_pos);
modplug->mSoundFile->SetCurrentPos (seek_to_pos);
modplug->seek_at = -1;
}
/* read and output a buffer */
GST_LOG_OBJECT (modplug, "Read %d bytes", (gint) modplug->read_bytes);
/* libmodplug 0.8.7 trashes memory */
out = gst_buffer_new_allocate (NULL, modplug->read_bytes * 2, NULL);
gst_buffer_map (out, &map, GST_MAP_WRITE);
if (!modplug->mSoundFile->Read (map.data, modplug->read_bytes)) {
gst_buffer_unmap (out, &map);
goto eos;
}
gst_buffer_unmap (out, &map);
gst_buffer_resize (out, 0, modplug->read_bytes);
GST_BUFFER_DURATION (out) =
gst_util_uint64_scale_int (modplug->read_samples, GST_SECOND,
modplug->frequency);
GST_BUFFER_OFFSET (out) = modplug->offset;
GST_BUFFER_TIMESTAMP (out) =
gst_util_uint64_scale_int (modplug->offset, GST_SECOND,
modplug->frequency);
modplug->offset += modplug->read_samples;
flow = gst_pad_push (modplug->srcpad, out);
if (flow != GST_FLOW_OK) {
GST_LOG_OBJECT (modplug, "pad push flow: %s", gst_flow_get_name (flow));
goto pause;
}
return;
eos:
{
gst_buffer_unref (out);
GST_INFO_OBJECT (modplug, "EOS");
gst_pad_push_event (modplug->srcpad, gst_event_new_eos ());
goto pause;
}
pause:
{
GST_INFO_OBJECT (modplug, "Pausing");
gst_pad_pause_task (modplug->sinkpad);
}
}
static GstStateChangeReturn
gst_modplug_change_state (GstElement * element, GstStateChange transition)
{
GstModPlug *modplug;
GstStateChangeReturn ret;
modplug = GST_MODPLUG (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
modplug->buffer = NULL;
modplug->offset = 0;
modplug->song_size = 0;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (modplug->buffer) {
gst_buffer_unref (modplug->buffer);
modplug->buffer = NULL;
}
if (modplug->mSoundFile) {
modplug->mSoundFile->Destroy ();
delete modplug->mSoundFile;
modplug->mSoundFile = NULL;
}
break;
default:
break;
}
return GST_STATE_CHANGE_SUCCESS;
}
static void
gst_modplug_set_property (GObject * object, guint id, const GValue * value,
GParamSpec * pspec)
{
GstModPlug *modplug;
g_return_if_fail (GST_IS_MODPLUG (object));
modplug = GST_MODPLUG (object);
switch (id) {
case ARG_REVERB:
modplug->reverb = g_value_get_boolean (value);
break;
case ARG_REVERB_DEPTH:
modplug->reverb_depth = g_value_get_int (value);
break;
case ARG_REVERB_DELAY:
modplug->reverb_delay = g_value_get_int (value);
break;
case ARG_MEGABASS:
modplug->megabass = g_value_get_boolean (value);
break;
case ARG_MEGABASS_AMOUNT:
modplug->megabass_amount = g_value_get_int (value);
break;
case ARG_MEGABASS_RANGE:
modplug->megabass_range = g_value_get_int (value);
break;
case ARG_NOISE_REDUCTION:
modplug->noise_reduction = g_value_get_boolean (value);
break;
case ARG_SURROUND:
modplug->surround = g_value_get_boolean (value);
break;
case ARG_SURROUND_DEPTH:
modplug->surround_depth = g_value_get_int (value);
break;
case ARG_SURROUND_DELAY:
modplug->surround_delay = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_modplug_get_property (GObject * object, guint id, GValue * value,
GParamSpec * pspec)
{
GstModPlug *modplug;
g_return_if_fail (GST_IS_MODPLUG (object));
modplug = GST_MODPLUG (object);
switch (id) {
case ARG_REVERB:
g_value_set_boolean (value, modplug->reverb);
break;
case ARG_REVERB_DEPTH:
g_value_set_int (value, modplug->reverb_depth);
break;
case ARG_REVERB_DELAY:
g_value_set_int (value, modplug->reverb_delay);
break;
case ARG_MEGABASS:
g_value_set_boolean (value, modplug->megabass);
break;
case ARG_MEGABASS_AMOUNT:
g_value_set_int (value, modplug->megabass_amount);
break;
case ARG_MEGABASS_RANGE:
g_value_set_int (value, modplug->megabass_range);
break;
case ARG_SURROUND:
g_value_set_boolean (value, modplug->surround);
break;
case ARG_SURROUND_DEPTH:
g_value_set_int (value, modplug->surround_depth);
break;
case ARG_SURROUND_DELAY:
g_value_set_int (value, modplug->surround_delay);
break;
case ARG_NOISE_REDUCTION:
g_value_set_boolean (value, modplug->noise_reduction);
break;
default:
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "modplug",
GST_RANK_PRIMARY, GST_TYPE_MODPLUG);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
modplug,
".MOD audio decoding",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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