+++ /dev/null
-/* 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "gstspc.h"
-
-#include <string.h>
-#include <glib/gprintf.h>
-#include <glib.h>
-
-static const GstElementDetails gst_spc_dec_details =
-GST_ELEMENT_DETAILS ("SNES SPC 700 decoder",
- "Codec/Audio/Decoder",
- "Uses Blargg's libgme to emulate an SPC processor",
- "Chris Lee <clee@kde.org>, Brian Koropoff <bkoropoff@gmail.com>, Michael Pyne <mpyne@kde.org>");
-
-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-int, "
- "endianness = (int) BYTE_ORDER, "
- "signed = (boolean) TRUE, "
- "width = (int) 16, "
- "depth = (int) 16, " "rate = (int) 32000, " "channels = (int) 2"));
-
-GST_BOILERPLATE (GstSpcDec, gst_spc_dec, GstElement, GST_TYPE_ELEMENT);
-
-static GstFlowReturn gst_spc_dec_chain (GstPad * pad, GstBuffer * buffer);
-static gboolean gst_spc_dec_sink_event (GstPad * pad, GstEvent * event);
-static gboolean gst_spc_dec_src_event (GstPad * pad, GstEvent * event);
-static gboolean gst_spc_dec_src_query (GstPad * pad, GstQuery * query);
-static GstStateChangeReturn gst_spc_dec_change_state (GstElement * element,
- GstStateChange transition);
-static void gst_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 *allowed, *caps;
- GstStructure *structure;
- gint width = 16, depth = 16;
- gboolean sign;
- int rate = 32000;
- int channels = 2;
-
- allowed = gst_pad_get_allowed_caps (spc->srcpad);
- if (!allowed) {
- GST_DEBUG_OBJECT (spc, "couldn't get allowed caps");
- return FALSE;
- }
-
- GST_DEBUG_OBJECT (spc, "allowed caps: %" GST_PTR_FORMAT, allowed);
-
- structure = gst_caps_get_structure (allowed, 0);
- gst_structure_get_int (structure, "width", &width);
- gst_structure_get_int (structure, "depth", &depth);
-
- if (width && depth && width != depth) {
- GST_DEBUG_OBJECT (spc, "width %d and depth %d are different", width, depth);
- gst_caps_unref (allowed);
- return FALSE;
- }
-
- gst_structure_get_boolean (structure, "signed", &sign);
- gst_structure_get_int (structure, "rate", &rate);
- gst_structure_get_int (structure, "channels", &channels);
-
- caps = gst_caps_new_simple ("audio/x-raw-int",
- "endianness", G_TYPE_INT, G_BYTE_ORDER,
- "signed", G_TYPE_BOOLEAN, TRUE,
- "width", G_TYPE_INT, width,
- "depth", G_TYPE_INT, depth,
- "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
- gst_pad_set_caps (spc->srcpad, caps);
-
- gst_caps_unref (caps);
- gst_caps_unref (allowed);
-
- return TRUE;
-}
-
-static void
-gst_spc_dec_base_init (gpointer g_class)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details (element_class, &gst_spc_dec_details);
-
- 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));
-}
-
-static void
-gst_spc_dec_class_init (GstSpcDecClass * klass)
-{
- GstElementClass *element_class = (GstElementClass *) klass;
- GObjectClass *gobject_class = (GObjectClass *) klass;
-
- element_class->change_state = GST_DEBUG_FUNCPTR (gst_spc_dec_change_state);
- gobject_class->dispose = gst_spc_dec_dispose;
-}
-
-static const GstQueryType *
-gst_spc_dec_src_query_type (GstPad * pad)
-{
- static const GstQueryType query_types[] = {
- GST_QUERY_DURATION,
- GST_QUERY_POSITION,
- (GstQueryType) 0
- };
-
- return query_types;
-}
-
-
-static void
-gst_spc_dec_init (GstSpcDec * spc, GstSpcDecClass * klass)
-{
- 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_set_query_type_function (spc->srcpad, gst_spc_dec_src_query_type);
- gst_pad_use_fixed_caps (spc->srcpad);
- gst_element_add_pad (GST_ELEMENT (spc), spc->srcpad);
-
- spc->buf = NULL;
- spc->player = 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);
-}
-
-static GstFlowReturn
-gst_spc_dec_chain (GstPad * pad, GstBuffer * buffer)
-{
- GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
-
- /* Accumulate SPC data until end-of-stream, then commence playback. */
- if (spc->buf) {
- spc->buf = gst_buffer_join (spc->buf, buffer);
- } else {
- spc->buf = buffer;
- }
-
- gst_object_unref (spc);
-
- return GST_FLOW_OK;
-}
-
-static gboolean
-gst_spc_dec_sink_event (GstPad * pad, GstEvent * event)
-{
- GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
- 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);
-
- gst_object_unref (spc);
-
- 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, GstEvent * event)
-{
- GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
- 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 (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) {
- guint64 cur = gme_tell (spc->player) * GST_MSECOND;
- 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 ());
- }
-
- if (stop == GST_CLOCK_TIME_NONE)
- stop = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
-
- gst_pad_push_event (spc->srcpad, gst_event_new_new_segment (FALSE, rate,
- GST_FORMAT_TIME, dest, stop, dest));
-
- spc->seekpoint = dest / GST_MSECOND; /* nsecs to msecs */
- spc->seeking = TRUE;
-
- gst_pad_start_task (spc->srcpad, (GstTaskFunction) gst_spc_play,
- spc->srcpad);
-
- GST_PAD_STREAM_UNLOCK (spc->srcpad);
- result = TRUE;
- }
- break;
- }
- default:
- result = gst_pad_push_event (spc->sinkpad, event);
- break;
- }
-
- gst_object_unref (spc);
-
- return result;
-}
-
-static gboolean
-gst_spc_dec_src_query (GstPad * pad, GstQuery * query)
-{
- GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
- 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) gme_tell (spc->player) * GST_MSECOND);
- break;
- }
- default:
- result = gst_pad_query_default (pad, query);
- break;
- }
-
- gst_object_unref (spc);
-
- return result;
-}
-
-static void
-gst_spc_play (GstPad * pad)
-{
- GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
- GstFlowReturn flow_return;
- GstBuffer *out;
- gboolean seeking = spc->seeking;
- gme_err_t gme_err = NULL;
- gint64 duration, fade, end, position;
- const int NUM_SAMPLES = 1600; /* 4 bytes (stereo 16-bit) per sample */
-
- if (!seeking) {
- out = gst_buffer_new_and_alloc (NUM_SAMPLES * 4);
- gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
- GST_BUFFER_TIMESTAMP (out) = gme_tell (spc->player) * GST_MSECOND;
-
- gme_err =
- gme_play (spc->player, NUM_SAMPLES * 2,
- (short *) GST_BUFFER_DATA (out));
- if (gme_err) {
- GST_ELEMENT_ERROR (spc, STREAM, DEMUX, (NULL), (gme_err));
- gst_pad_pause_task (pad);
- gst_pad_push_event (pad, gst_event_new_eos ());
- gst_object_unref (spc);
- return;
- }
- } else {
- gme_seek (spc->player, spc->seekpoint);
- spc->seeking = FALSE;
-
- out = gst_buffer_new ();
- gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
- }
-
- duration = gst_spc_duration (spc);
- fade = gst_spc_fadeout (spc);
- end = duration + fade;
- position = gme_tell (spc->player) * GST_MSECOND;
-
- if (position >= duration) {
- gint16 *data = (gint16 *) GST_BUFFER_DATA (out);
- guint32 size = GST_BUFFER_SIZE (out) / sizeof (gint16);
- unsigned int i;
-
- gint64 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 (GST_FLOW_IS_FATAL (flow_return) || 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;
- gme_err_t gme_err = NULL;
- GstTagList *taglist;
- guint64 total_duration;
-
- if (!spc->buf || !spc_negotiate (spc)) {
- return FALSE;
- }
-
- info = &(spc->tag_info);
-
- spc_tag_get_info (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf),
- info);
-
- taglist = gst_tag_list_new ();
-
- 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) {
- GDate *date = g_date_new_dmy (1, 1, info->year);
-
- gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_DATE, date, NULL);
- g_date_free (date);
- }
- 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_element_found_tags_for_pad (GST_ELEMENT (spc), spc->srcpad, taglist);
-
- /* spc_tag_info_free(&info); */
-
- gme_err =
- gme_open_data (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf),
- &spc->player, 32000);
- if (gme_err || !spc->player) {
- if (spc->player) {
- gme_delete (spc->player);
- spc->player = NULL;
- }
-
- GST_ELEMENT_ERROR (spc, STREAM, DEMUX, (NULL), (gme_err));
-
- return FALSE;
- }
-#ifdef HAVE_LIBGME_ACCURACY
- /* TODO: Is it worth it to make this optional? */
- gme_enable_accuracy (spc->player, 1);
-#endif
- gme_start_track (spc->player, 0);
-
- gst_pad_push_event (spc->srcpad, gst_event_new_new_segment (FALSE, 1.0,
- GST_FORMAT_TIME, 0, -1, 0));
-
- gst_pad_start_task (spc->srcpad, (GstTaskFunction) gst_spc_play, spc->srcpad);
-
- /* 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;
- 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 (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_PRIMARY,
- 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);
+++ /dev/null
-/* 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.
- */
-
-#include <glib/gstring.h>
-#include <glib/gtypes.h>
-#include <glib/gmem.h>
-#include <glib/gprintf.h>
-
-#include <tag.h>
-#include <string.h>
-#include <stdlib.h>
-
-
-#define EXTENDED_OFFSET 0x10200
-#define EXTENDED_MAGIC ((guint32) ('x' << 0 | 'i' << 8 | 'd' << 16 | '6' << 24))
-
-#define TYPE_LENGTH 0x0
-#define TYPE_STRING 0x1
-#define TYPE_INTEGER 0x4
-
-#define TAG_TITLE 0x01
-#define TAG_GAME 0x02
-#define TAG_ARTIST 0x03
-#define TAG_DUMPER 0x04
-#define TAG_DUMP_DATE 0x05
-#define TAG_EMULATOR 0x06
-#define TAG_COMMENT 0x07
-#define TAG_ALBUM 0x10
-#define TAG_DISC 0x11
-#define TAG_TRACK 0x12
-#define TAG_PUBLISHER 0x13
-#define TAG_YEAR 0x14
-#define TAG_INTRO 0x30
-#define TAG_LOOP 0x31
-#define TAG_END 0x32
-#define TAG_FADE 0x33
-#define TAG_MUTED 0x34
-#define TAG_COUNT 0x35
-#define TAG_AMP 0x36
-
-#define READ_INT8(data, offset) (data[offset])
-#define READ_INT16(data, offset) ((data[offset] << 0) + (data[offset+1] << 8))
-#define READ_INT24(data, offset) ((data[offset] << 0) + (data[offset+1] << 8) + (data[offset+2] << 16))
-#define READ_INT32(data, offset) ((data[offset] << 0) + (data[offset+1] << 8) + (data[offset+2] << 16) + (data[offset+3] << 24))
-
-static inline gboolean
-spc_tag_is_extended (guchar * data, guint length)
-{
- // Extended tags come at the end of the file (at a known offset)
- // and start with "xid6"
- return (length > EXTENDED_OFFSET + 4
- && READ_INT32 (data, EXTENDED_OFFSET) == EXTENDED_MAGIC);
-}
-
-static inline gboolean
-spc_tag_is_text_format (guchar * data, guint length)
-{
- // Because the id666 format is brain dead, there's
- // no definite way to decide if it is in text
- // format. This function implements a set of
- // heuristics to make a best-effort guess.
-
- // If the date field contains separators, it is probably text
- if (data[0xA0] == '/' || data[0xA0] == '.')
- return TRUE;
- // If the first byte of the date field is small (but not 0,
- // which could indicate an empty string), it's probably binary
- if (data[0x9E] >= 1 && data[0x9E] <= 31)
- return FALSE;
-
- // If all previous tests turned up nothing, assume it's text
- return TRUE;
-}
-
-static inline gboolean
-spc_tag_is_present (guchar * data, guint length)
-{
- return data[0x23] == 26;
-}
-
-static inline GDate *
-spc_tag_unpack_date (guint32 packed)
-{
- guint dump_year = packed / 10000;
- guint dump_month = (packed % 10000) / 100;
- guint dump_day = packed % 100;
-
- if (dump_month == 0)
- dump_month = 1;
- if (dump_day == 0)
- dump_day = 1;
-
- if (dump_year != 0)
- return g_date_new_dmy (dump_day, dump_month, dump_year);
- else
- return NULL;
-}
-
-void
-spc_tag_clear (spc_tag_info * info)
-{
- info->title = info->game = info->publisher = info->artist = info->album =
- info->comment = info->dumper = NULL;
- info->dump_date = NULL;
- info->time_seconds = 0;
- info->time_fade_milliseconds = 0;
- info->time_intro = 0;
- info->time_end = 0;
- info->time_loop = 0;
- info->time_fade = 0;
- info->loop_count = 0;
- info->muted = 0;
- info->disc = 0;
- info->amplification = 0;
-}
-
-void
-spc_tag_get_info (guchar * data, guint length, spc_tag_info * info)
-{
- spc_tag_clear (info);
-
- if (spc_tag_is_present (data, length)) {
- gboolean text_format = spc_tag_is_text_format (data, length);
-
- info->title = g_new0 (gchar, 0x21);
- info->game = g_new0 (gchar, 0x21);
- info->artist = g_new0 (gchar, 0x21);
- info->dumper = g_new0 (gchar, 0x10);
- info->comment = g_new0 (gchar, 0x32);
-
- strncpy (info->title, (gchar *) & data[0x2E], 32);
- strncpy (info->artist, (gchar *) & data[(text_format ? 0xB1 : 0xB0)], 32);
- strncpy (info->game, (gchar *) & data[0x4E], 32);
- strncpy (info->dumper, (gchar *) & data[0x6E], 16);
- strncpy (info->comment, (gchar *) & data[0x7E], 32);
-
- if (text_format) {
- gchar time[4];
- gchar fade[6];
- guint dump_year, dump_month, dump_day;
-
- strncpy (time, (gchar *) data + 0xA9, 3);
- strncpy (fade, (gchar *) data + 0xAC, 5);
-
- time[3] = fade[5] = 0;
-
- info->time_seconds = atoi (time);
- info->time_fade_milliseconds = atoi (fade);
-
- dump_year = (guint) atoi ((gchar *) data + 0x9E);
- dump_month = (guint) atoi ((gchar *) data + 0x9E + 3);
- dump_day = (guint) atoi ((gchar *) data + 0x9E + 3 + 3);
-
- if (dump_month == 0)
- dump_month = 1;
- if (dump_day == 0)
- dump_day = 1;
- if (dump_year != 0)
- info->dump_date = g_date_new_dmy (dump_day, dump_month, dump_year);
-
- info->muted = READ_INT8 (data, 0xD1);
- info->emulator = READ_INT8 (data, 0xD2);
- } else {
- info->time_seconds = READ_INT24 (data, 0xA9);
- info->time_fade_milliseconds = READ_INT32 (data, 0xAC);
- info->dump_date = spc_tag_unpack_date (READ_INT32 (data, 0x9E));
- info->muted = READ_INT8 (data, 0xD0);
- info->emulator = READ_INT8 (data, 0xD1);
- }
- }
-
- if (spc_tag_is_extended (data, length)) {
- guchar *chunk = data + EXTENDED_OFFSET + 8;
- guint32 chunk_size = *((guint32 *) (data + EXTENDED_OFFSET + 4));
-
- guchar *subchunk, *subchunk_next;
-
- for (subchunk = chunk; subchunk < chunk + chunk_size;
- subchunk = subchunk_next) {
- guint8 tag = READ_INT8 (subchunk, 0);
- guint8 type = READ_INT8 (subchunk, 1);
- guint16 length = READ_INT16 (subchunk, 2);
- guchar *value = subchunk + 4;
-
- switch (type) {
- case TYPE_LENGTH:
- {
- switch (tag) {
- case TAG_TRACK:
- info->track = READ_INT8 (subchunk, 2 + 1);
- break;
- case TAG_YEAR:
- info->year = READ_INT16 (subchunk, 2);
- break;
- case TAG_COUNT:
- info->loop_count = READ_INT8 (subchunk, 2);
- break;
- case TAG_EMULATOR:
- info->emulator = READ_INT8 (subchunk, 2);
- break;
- case TAG_DISC:
- info->disc = READ_INT8 (subchunk, 2);
- break;
- case TAG_MUTED:
- info->muted = READ_INT8 (subchunk, 2);
- break;
- default:
- break;
- }
-
- subchunk_next = subchunk + 4;
- break;
- }
- case TYPE_STRING:
- {
- gchar *dest;
-
- if (length <= 1)
- dest = NULL;
- else
- switch (tag) {
- case TAG_TITLE:
- dest = info->title = g_renew (gchar, info->title, length);
- break;
- case TAG_GAME:
- dest = info->game = g_renew (gchar, info->game, length);
- break;
- case TAG_ARTIST:
- dest = info->artist = g_renew (gchar, info->artist, length);
- break;
- case TAG_ALBUM:
- dest = info->album = g_renew (gchar, info->album, length);
- break;
- case TAG_DUMPER:
- dest = info->dumper = g_renew (gchar, info->dumper, length);
- break;
- case TAG_COMMENT:
- dest = info->comment = g_renew (gchar, info->comment, length);
- break;
- case TAG_PUBLISHER:
- dest = info->publisher =
- g_renew (gchar, info->publisher, length);
- break;
- default:
- dest = NULL;
- break;
- }
-
- if (dest)
- strncpy (dest, (gchar *) value, length);
-
- subchunk_next = value + length;
- break;
- }
- case TYPE_INTEGER:
- {
- switch (tag) {
- case TAG_INTRO:
- info->time_intro = READ_INT32 (value, 0);
- break;
- case TAG_END:
- info->time_end = READ_INT32 (value, 0);
- break;
- case TAG_FADE:
- info->time_fade = READ_INT32 (value, 0);
- break;
- case TAG_LOOP:
- info->time_loop = READ_INT32 (value, 0);
- break;
- case TAG_DUMP_DATE:
- info->dump_date = spc_tag_unpack_date (READ_INT32 (value, 0));
- break;
- case TAG_AMP:
- info->amplification = READ_INT32 (value, 0);
- break;
- default:
- break;
- }
- subchunk_next = value + length;
- break;
- }
- default:
- subchunk_next = value + length;
- break;
- }
- }
- }
-
- if (info->title && !*info->title) {
- g_free (info->title);
- info->title = NULL;
- }
- if (info->game && !*info->game) {
- g_free (info->game);
- info->game = NULL;
- }
- if (info->artist && !*info->artist) {
- g_free (info->artist);
- info->artist = NULL;
- }
- if (info->album && !*info->album) {
- g_free (info->album);
- info->album = NULL;
- }
- if (info->publisher && !*info->publisher) {
- g_free (info->publisher);
- info->publisher = NULL;
- }
- if (info->comment && !*info->comment) {
- g_free (info->comment);
- info->comment = NULL;
- }
- if (info->dumper && !*info->dumper) {
- g_free (info->dumper);
- info->dumper = NULL;
- }
-}
-
-void
-spc_tag_free (spc_tag_info * info)
-{
- if (info->title)
- g_free (info->title);
- if (info->game)
- g_free (info->game);
- if (info->artist)
- g_free (info->artist);
- if (info->album)
- g_free (info->album);
- if (info->publisher)
- g_free (info->publisher);
- if (info->comment)
- g_free (info->comment);
- if (info->dumper)
- g_free (info->dumper);
- if (info->dump_date)
- g_date_free (info->dump_date);
-}
projects / platform / upstream / gstreamer.git / commitdiff