gstreamer/ext/gme/gstgme.c
2012-06-20 10:40:42 +02:00

515 lines
15 KiB
C

/* Copyright (C) 2004-2005,2009 Michael Pyne <mpyne at kde org>
* Copyright (C) 2004-2006 Chris Lee <clee at kde org>
* Copyright (C) 2007 Brian Koropoff <bkoropoff at gmail 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.
*/
/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
* with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgme.h"
#include <gst/audio/audio.h>
#include <string.h>
#include <glib/gprintf.h>
#include <glib.h>
static GstStaticPadTemplate sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-ay; "
"audio/x-gbs; "
"audio/x-gym; "
"audio/x-hes; "
"audio/x-kss; "
"audio/x-nsf; " "audio/x-sap; " "audio/x-spc; " "audio/x-vgm"));
static GstStaticPadTemplate src_factory =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) " GST_AUDIO_NE (S16) ", "
"layout = (string) interleaved, "
"rate = (int) 32000, " "channels = (int) 2"));
#define gst_gme_dec_parent_class parent_class
G_DEFINE_TYPE (GstGmeDec, gst_gme_dec, GST_TYPE_ELEMENT);
static GstFlowReturn gst_gme_dec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_gme_dec_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_gme_dec_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_gme_dec_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstStateChangeReturn gst_gme_dec_change_state (GstElement * element,
GstStateChange transition);
static void gst_gme_play (GstPad * pad);
static void gst_gme_dec_dispose (GObject * object);
static gboolean gme_setup (GstGmeDec * gme);
static gboolean
gme_negotiate (GstGmeDec * gme)
{
GstCaps *caps;
caps = gst_pad_get_pad_template_caps (gme->srcpad);
gst_pad_set_caps (gme->srcpad, caps);
gst_caps_unref (caps);
return TRUE;
}
static void
gst_gme_dec_class_init (GstGmeDecClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
gobject_class->dispose = gst_gme_dec_dispose;
gst_element_class_set_details_simple (element_class,
"Gaming console music file decoder", "Codec/Audio/Decoder",
"Uses libgme to emulate a gaming console sound processors",
"Chris Lee <clee@kde.org>, Brian Koropoff <bkoropoff@gmail.com>, "
"Michael Pyne <mpyne@kde.org>, Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
element_class->change_state = GST_DEBUG_FUNCPTR (gst_gme_dec_change_state);
}
static void
gst_gme_dec_init (GstGmeDec * gme)
{
gme->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
/* gst_pad_set_query_function (gme->sinkpad, NULL); */
gst_pad_set_event_function (gme->sinkpad, gst_gme_dec_sink_event);
gst_pad_set_chain_function (gme->sinkpad, gst_gme_dec_chain);
gst_element_add_pad (GST_ELEMENT (gme), gme->sinkpad);
gme->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_event_function (gme->srcpad, gst_gme_dec_src_event);
gst_pad_set_query_function (gme->srcpad, gst_gme_dec_src_query);
gst_pad_use_fixed_caps (gme->srcpad);
gst_element_add_pad (GST_ELEMENT (gme), gme->srcpad);
gme->adapter = gst_adapter_new ();
gme->player = NULL;
gme->total_duration = GST_CLOCK_TIME_NONE;
gme->initialized = FALSE;
}
static void
gst_gme_dec_dispose (GObject * object)
{
GstGmeDec *gme = GST_GME_DEC (object);
if (gme->adapter) {
g_object_unref (gme->adapter);
gme->adapter = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static GstFlowReturn
gst_gme_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstGmeDec *gme = GST_GME_DEC (parent);
/* Accumulate GME data until end-of-stream, then commence playback. */
gst_adapter_push (gme->adapter, buffer);
return GST_FLOW_OK;
}
static gboolean
gst_gme_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstGmeDec *gme = GST_GME_DEC (parent);
gboolean result = TRUE;
gboolean forward = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
/* we get EOS when we loaded the complete file, now try to initialize the
* decoding */
if (!(result = gme_setup (gme))) {
/* can't start, post an ERROR and push EOS downstream */
GST_ELEMENT_ERROR (gme, STREAM, DEMUX, (NULL),
("can't start playback"));
forward = TRUE;
}
break;
default:
break;
}
if (forward)
result = gst_pad_push_event (gme->srcpad, event);
else
gst_event_unref (event);
return result;
}
static gboolean
gst_gme_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstGmeDec *gme = GST_GME_DEC (parent);
gboolean result = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gboolean flush;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
gst_event_unref (event);
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (gme, "seeking is only supported in TIME format");
break;
}
if (start_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE) {
GST_DEBUG_OBJECT (gme, "unsupported seek type");
break;
}
if (stop_type == GST_SEEK_TYPE_NONE)
stop = GST_CLOCK_TIME_NONE;
if (start_type == GST_SEEK_TYPE_SET) {
GstSegment seg;
guint64 cur = gme_tell (gme->player) * GST_MSECOND;
guint64 dest = (guint64) start;
if (gme->total_duration != GST_CLOCK_TIME_NONE)
dest = CLAMP (dest, 0, gme->total_duration);
else
dest = MAX (0, dest);
if (dest == cur)
break;
flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
if (flush) {
gst_pad_push_event (gme->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (gme->srcpad);
}
GST_PAD_STREAM_LOCK (gme->srcpad);
if (flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (gme),
gst_message_new_segment_start (GST_OBJECT (gme), format, cur));
}
if (flush) {
gst_pad_push_event (gme->srcpad, gst_event_new_flush_stop (TRUE));
}
if (stop == GST_CLOCK_TIME_NONE
&& gme->total_duration != GST_CLOCK_TIME_NONE)
stop = gme->total_duration;
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.rate = rate;
seg.start = dest;
seg.stop = stop;
seg.time = dest;
gst_pad_push_event (gme->srcpad, gst_event_new_segment (&seg));
gme->seekpoint = dest / GST_MSECOND; /* nsecs to msecs */
gme->seeking = TRUE;
gst_pad_start_task (gme->srcpad, (GstTaskFunction) gst_gme_play,
gme->srcpad, NULL);
GST_PAD_STREAM_UNLOCK (gme->srcpad);
result = TRUE;
}
break;
}
default:
result = gst_pad_push_event (gme->sinkpad, event);
break;
}
return result;
}
static gboolean
gst_gme_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstGmeDec *gme = GST_GME_DEC (parent);
gboolean result = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
if (!gme->initialized || format != GST_FORMAT_TIME
|| gme->total_duration == GST_CLOCK_TIME_NONE) {
result = FALSE;
break;
}
gst_query_set_duration (query, GST_FORMAT_TIME, gme->total_duration);
break;
}
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
if (!gme->initialized || format != GST_FORMAT_TIME) {
result = FALSE;
break;
}
gst_query_set_position (query, GST_FORMAT_TIME,
(gint64) gme_tell (gme->player) * GST_MSECOND);
break;
}
default:
result = gst_pad_query_default (pad, parent, query);
break;
}
return result;
}
static void
gst_gme_play (GstPad * pad)
{
GstGmeDec *gme = GST_GME_DEC (gst_pad_get_parent (pad));
GstFlowReturn flow_return;
GstBuffer *out;
gboolean seeking = gme->seeking;
gme_err_t gme_err = NULL;
const int NUM_SAMPLES = 1600; /* 4 bytes (stereo 16-bit) per sample */
if (!seeking) {
GstMapInfo map;
out = gst_buffer_new_and_alloc (NUM_SAMPLES * 4);
GST_BUFFER_TIMESTAMP (out) = gme_tell (gme->player) * GST_MSECOND;
gst_buffer_map (out, &map, GST_MAP_WRITE);
gme_err = gme_play (gme->player, NUM_SAMPLES * 2, (short *) map.data);
gst_buffer_unmap (out, &map);
if (gme_err) {
GST_ELEMENT_ERROR (gme, STREAM, DEMUX, (NULL), ("%s", gme_err));
gst_pad_pause_task (pad);
gst_pad_push_event (pad, gst_event_new_eos ());
gst_object_unref (gme);
return;
}
} else {
gme_seek (gme->player, gme->seekpoint);
gme->seeking = FALSE;
out = gst_buffer_new ();
}
if ((flow_return = gst_pad_push (gme->srcpad, out)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (gme, "pausing task, reason %s",
gst_flow_get_name (flow_return));
gst_pad_pause_task (pad);
if (flow_return == GST_FLOW_EOS) {
gst_pad_push_event (pad, gst_event_new_eos ());
} else if (flow_return < GST_FLOW_EOS || flow_return == GST_FLOW_NOT_LINKED) {
GST_ELEMENT_ERROR (gme, STREAM, FAILED, ("Internal data stream error."),
("stream stopped, reason %s", gst_flow_get_name (flow_return)));
gst_pad_push_event (pad, gst_event_new_eos ());
}
}
if (gme_tell (gme->player) * GST_MSECOND > gme->total_duration) {
gst_pad_pause_task (pad);
gst_pad_push_event (pad, gst_event_new_eos ());
}
gst_object_unref (gme);
return;
}
static gboolean
gme_setup (GstGmeDec * gme)
{
gme_info_t *info;
gme_err_t gme_err = NULL;
GstTagList *taglist;
guint64 total_duration;
guint64 fade_time;
GstBuffer *buffer;
GstSegment seg;
GstMapInfo map;
if (!gst_adapter_available (gme->adapter) || !gme_negotiate (gme)) {
return FALSE;
}
buffer =
gst_adapter_take_buffer (gme->adapter,
gst_adapter_available (gme->adapter));
gst_buffer_map (buffer, &map, GST_MAP_READ);
gme_err = gme_open_data (map.data, map.size, &gme->player, 32000);
gst_buffer_unmap (buffer, &map);
gst_buffer_unref (buffer);
if (gme_err || !gme->player) {
if (gme->player) {
gme_delete (gme->player);
gme->player = NULL;
}
GST_ELEMENT_ERROR (gme, STREAM, DEMUX, (NULL), ("%s", gme_err));
return FALSE;
}
gme_err = gme_track_info (gme->player, &info, 0);
taglist = gst_tag_list_new_empty ();
if (info->song && *info->song)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TITLE,
info->song, NULL);
if (info->author && *info->author)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ARTIST,
info->author, NULL);
/* Prefer the name of the official soundtrack over the name of the game (since this is
* how track numbers are derived)
*/
if (info->game && *info->game)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM, info->game,
NULL);
if (info->comment && *info->comment)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_COMMENT,
info->comment, NULL);
if (info->dumper && *info->dumper)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_CONTACT,
info->dumper, NULL);
if (info->copyright && *info->copyright)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_COPYRIGHT,
info->copyright, NULL);
if (info->system && *info->system)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ENCODER,
info->system, NULL);
gme->total_duration = total_duration =
gst_util_uint64_scale_int (info->play_length + (info->loop_length >
0 ? 8000 : 0), GST_MSECOND, 1);
fade_time = info->loop_length > 0 ? info->play_length : 0;
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_DURATION, total_duration, NULL);
gst_pad_push_event (gme->srcpad, gst_event_new_tag ("GstDecoder", taglist));
g_free (info);
#ifdef HAVE_LIBGME_ACCURACY
/* TODO: Is it worth it to make this optional? */
gme_enable_accuracy (gme->player, 1);
#endif
gme_start_track (gme->player, 0);
if (fade_time)
gme_set_fade (gme->player, fade_time);
gst_segment_init (&seg, GST_FORMAT_TIME);
gst_pad_push_event (gme->srcpad, gst_event_new_segment (&seg));
gst_pad_start_task (gme->srcpad, (GstTaskFunction) gst_gme_play, gme->srcpad,
NULL);
gme->initialized = TRUE;
gme->seeking = FALSE;
gme->seekpoint = 0;
return gme->initialized;
}
static GstStateChangeReturn
gst_gme_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn result;
GstGmeDec *dec;
dec = GST_GME_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
dec->total_duration = GST_CLOCK_TIME_NONE;
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (result == GST_STATE_CHANGE_FAILURE)
return result;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_adapter_clear (dec->adapter);
break;
default:
break;
}
return result;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "gmedec", GST_RANK_PRIMARY,
GST_TYPE_GME_DEC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
gmedec,
"GME Audio Decoder",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);