gstreamer/ext/spc/gstspc.c

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/* Copyright (C) 2004-2005 Michael Pyne <michael dot pyne at kdemail net>
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstspc.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-spc"));
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_spc_dec_parent_class parent_class
G_DEFINE_TYPE (GstSpcDec, gst_spc_dec, GST_TYPE_ELEMENT);
static GstFlowReturn gst_spc_dec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_spc_dec_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_spc_dec_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_spc_dec_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstStateChangeReturn gst_spc_dec_change_state (GstElement * element,
GstStateChange transition);
static void spc_play (GstPad * pad);
static void gst_spc_dec_dispose (GObject * object);
static gboolean spc_setup (GstSpcDec * spc);
static gboolean
spc_negotiate (GstSpcDec * spc)
{
GstCaps *caps;
caps = gst_pad_get_pad_template_caps (spc->srcpad);
gst_pad_set_caps (spc->srcpad, caps);
gst_caps_unref (caps);
return TRUE;
}
static void
gst_spc_dec_class_init (GstSpcDecClass * klass)
{
GstElementClass *element_class = (GstElementClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
gst_element_class_set_static_metadata (element_class, "OpenSPC SPC decoder",
"Codec/Audio/Decoder",
"Uses OpenSPC to emulate an SPC processor",
"Chris Lee <clee@kde.org>, Brian Koropoff <bkoropoff@gmail.com>");
gst_element_class_add_static_pad_template (element_class, &sink_factory);
gst_element_class_add_static_pad_template (element_class, &src_factory);
element_class->change_state = GST_DEBUG_FUNCPTR (gst_spc_dec_change_state);
gobject_class->dispose = gst_spc_dec_dispose;
}
static void
gst_spc_dec_init (GstSpcDec * spc)
{
spc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
/* gst_pad_set_query_function (spc->sinkpad, NULL); */
gst_pad_set_event_function (spc->sinkpad, gst_spc_dec_sink_event);
gst_pad_set_chain_function (spc->sinkpad, gst_spc_dec_chain);
gst_element_add_pad (GST_ELEMENT (spc), spc->sinkpad);
spc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_event_function (spc->srcpad, gst_spc_dec_src_event);
gst_pad_set_query_function (spc->srcpad, gst_spc_dec_src_query);
gst_pad_use_fixed_caps (spc->srcpad);
gst_element_add_pad (GST_ELEMENT (spc), spc->srcpad);
spc->buf = NULL;
spc->initialized = FALSE;
spc_tag_clear (&spc->tag_info);
}
static void
gst_spc_dec_dispose (GObject * object)
{
GstSpcDec *spc = GST_SPC_DEC (object);
if (spc->buf) {
gst_buffer_unref (spc->buf);
spc->buf = NULL;
}
spc_tag_free (&spc->tag_info);
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static GstFlowReturn
gst_spc_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstSpcDec *spc = GST_SPC_DEC (parent);
if (spc->buf) {
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spc->buf = gst_buffer_append (spc->buf, buffer);
} else {
spc->buf = buffer;
}
return GST_FLOW_OK;
}
static gboolean
gst_spc_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSpcDec *spc = GST_SPC_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 = spc_setup (spc))) {
/* can't start, post an ERROR and push EOS downstream */
GST_ELEMENT_ERROR (spc, STREAM, DEMUX, (NULL),
("can't start playback"));
forward = TRUE;
}
break;
default:
break;
}
if (forward)
result = gst_pad_push_event (spc->srcpad, event);
else
gst_event_unref (event);
return result;
}
static gint64
gst_spc_duration (GstSpcDec * spc)
{
gint64 total_ticks =
spc->tag_info.time_intro +
spc->tag_info.time_loop * spc->tag_info.loop_count +
spc->tag_info.time_end;
if (total_ticks) {
return (gint64) gst_util_uint64_scale (total_ticks, GST_SECOND, 64000);
} else if (spc->tag_info.time_seconds) {
gint64 time = (gint64) spc->tag_info.time_seconds * GST_SECOND;
return time;
} else {
return (gint64) (3 * 60) * GST_SECOND;
}
}
static gint64
gst_spc_fadeout (GstSpcDec * spc)
{
if (spc->tag_info.time_fade) {
return (gint64) gst_util_uint64_scale ((guint64) spc->tag_info.time_fade,
GST_SECOND, 64000);
} else if (spc->tag_info.time_fade_milliseconds) {
return (gint64) (spc->tag_info.time_fade_milliseconds * GST_MSECOND);
} else {
return 10 * GST_SECOND;
}
}
static gboolean
gst_spc_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSpcDec *spc = GST_SPC_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);
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (spc, "seeking is only supported in TIME format");
break;
}
if (start_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE) {
GST_DEBUG_OBJECT (spc, "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 =
gst_util_uint64_scale (spc->byte_pos, GST_SECOND, 32000 * 2 * 2);
guint64 dest = (guint64) start;
dest = CLAMP (dest, 0, gst_spc_duration (spc) + gst_spc_fadeout (spc));
if (dest == cur)
break;
flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
if (flush) {
gst_pad_push_event (spc->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (spc->srcpad);
}
GST_PAD_STREAM_LOCK (spc->srcpad);
if (flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (spc),
gst_message_new_segment_start (GST_OBJECT (spc), format, cur));
}
if (flush) {
gst_pad_push_event (spc->srcpad, gst_event_new_flush_stop (TRUE));
}
if (stop == GST_CLOCK_TIME_NONE)
stop = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.rate = rate;
seg.start = dest;
seg.stop = stop;
seg.time = dest;
gst_pad_push_event (spc->srcpad, gst_event_new_segment (&seg));
/* spc->byte_pos += OSPC_Run(-1, NULL, (unsigned int) (gst_util_uint64_scale(dest - cur, 32000*2*2, GST_SECOND))); */
spc->seekpoint =
gst_util_uint64_scale (dest, 32000 * 2 * 2, GST_SECOND);
spc->seeking = TRUE;
gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play,
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spc->srcpad, NULL);
GST_PAD_STREAM_UNLOCK (spc->srcpad);
result = TRUE;
}
break;
}
default:
break;
}
return result;
}
static gboolean
gst_spc_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstSpcDec *spc = GST_SPC_DEC (parent);
gboolean result = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
if (!spc->initialized || format != GST_FORMAT_TIME) {
result = FALSE;
break;
}
gst_query_set_duration (query, GST_FORMAT_TIME,
gst_spc_duration (spc) + gst_spc_fadeout (spc));
break;
}
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
if (!spc->initialized || format != GST_FORMAT_TIME) {
result = FALSE;
break;
}
gst_query_set_position (query, GST_FORMAT_TIME,
(gint64) gst_util_uint64_scale (spc->byte_pos, GST_SECOND,
32000 * 2 * 2));
break;
}
default:
result = gst_pad_query_default (pad, parent, query);
break;
}
return result;
}
static void
spc_play (GstPad * pad)
{
GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
GstFlowReturn flow_return;
GstBuffer *out;
gboolean seeking = spc->seeking;
gint64 duration, fade, end, position;
GstMapInfo map;
if (!seeking) {
out = gst_buffer_new_and_alloc (1600 * 4);
GST_BUFFER_TIMESTAMP (out) =
(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
32000 * 2 * 2);
gst_buffer_map (out, &map, GST_MAP_WRITE);
spc->byte_pos += OSPC_Run (-1, (short *) map.data, 1600 * 4);
gst_buffer_unmap (out, &map);
} else {
if (spc->seekpoint < spc->byte_pos) {
gst_buffer_map (spc->buf, &map, GST_MAP_WRITE);
OSPC_Init (map.data, map.size);
gst_buffer_unmap (spc->buf, &map);
spc->byte_pos = 0;
}
spc->byte_pos += OSPC_Run (-1, NULL, 1600 * 4);
if (spc->byte_pos >= spc->seekpoint) {
spc->seeking = FALSE;
}
out = gst_buffer_new ();
}
duration = gst_spc_duration (spc);
fade = gst_spc_fadeout (spc);
end = duration + fade;
position =
(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
32000 * 2 * 2);
if (position >= duration) {
gint16 *data;
guint32 size;
unsigned int i;
gint64 num;
gst_buffer_map (out, &map, GST_MAP_WRITE);
data = (gint16 *) map.data;
size = map.size / sizeof (gint16);
num = (fade - (position - duration));
for (i = 0; i < size; i++) {
/* Apply a parabolic volume envelope */
data[i] = (gint16) (data[i] * num / fade * num / fade);
}
}
if ((flow_return = gst_pad_push (spc->srcpad, out)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (spc, "pausing task, reason %s",
gst_flow_get_name (flow_return));
gst_pad_pause_task (pad);
if (flow_return <= GST_FLOW_EOS || flow_return == GST_FLOW_NOT_LINKED) {
gst_pad_push_event (pad, gst_event_new_eos ());
}
}
if (position >= end) {
gst_pad_pause_task (pad);
gst_pad_push_event (pad, gst_event_new_eos ());
}
gst_object_unref (spc);
return;
}
static gboolean
spc_setup (GstSpcDec * spc)
{
spc_tag_info *info;
GstTagList *taglist;
guint64 total_duration;
GstSegment seg;
GstMapInfo map;
if (!spc->buf || !spc_negotiate (spc)) {
return FALSE;
}
info = &(spc->tag_info);
gst_buffer_map (spc->buf, &map, GST_MAP_READ);
spc_tag_get_info (map.data, map.size, info);
taglist = gst_tag_list_new_empty ();
if (info->title)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TITLE,
info->title, NULL);
if (info->artist)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ARTIST,
info->artist, NULL);
/* Prefer the name of the official soundtrack over the name of the game (since this is
* how track numbers are derived)
*/
if (info->album)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM,
info->album, NULL);
else if (info->game)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM, info->game,
NULL);
if (info->year) {
GstDateTime *dt = gst_date_time_new_y (info->year);
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME, dt,
NULL);
gst_date_time_unref (dt);
}
if (info->track) {
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TRACK_NUMBER,
info->track, NULL);
}
if (info->comment)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_COMMENT,
info->comment, NULL);
if (info->disc)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_ALBUM_VOLUME_NUMBER, info->disc, NULL);
if (info->publisher)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ORGANIZATION,
info->publisher, NULL);
if (info->dumper)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_CONTACT,
info->dumper, NULL);
if (info->emulator)
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ENCODER,
info->emulator == EMU_ZSNES ? "ZSNES" : "Snes9x", NULL);
total_duration = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_DURATION, total_duration,
GST_TAG_GENRE, "Game", GST_TAG_CODEC, "SPC700", NULL);
gst_pad_push_event (spc->srcpad, gst_event_new_tag (taglist));
/* spc_tag_info_free(&info); */
if (OSPC_Init (map.data, map.size) != 0) {
gst_buffer_unmap (spc->buf, &map);
return FALSE;
}
gst_buffer_unmap (spc->buf, &map);
gst_segment_init (&seg, GST_FORMAT_TIME);
gst_pad_push_event (spc->srcpad, gst_event_new_segment (&seg));
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gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play, spc->srcpad,
NULL);
/* We can't unreference this buffer because we might need to re-initialize
* the emulator with the original data during a reverse seek
* gst_buffer_unref (spc->buf);
* spc->buf = NULL;
*/
spc->initialized = TRUE;
spc->seeking = FALSE;
spc->seekpoint = 0;
spc->byte_pos = 0;
return spc->initialized;
}
static GstStateChangeReturn
gst_spc_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn result;
GstSpcDec *dec;
dec = GST_SPC_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
result =
GST_ELEMENT_CLASS (gst_spc_dec_parent_class)->change_state (element,
transition);
if (result == GST_STATE_CHANGE_FAILURE)
return result;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (dec->buf) {
gst_buffer_unref (dec->buf);
dec->buf = NULL;
}
break;
default:
break;
}
return result;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "spcdec", GST_RANK_SECONDARY,
GST_TYPE_SPC_DEC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
spcdec,
"OpenSPC Audio Decoder",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);