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ext/spc/: Add support for some essential features like seeking, reading song duration and extended tags. Fixes bug #4...
Original commit message from CVS: Patch by: Brian Koropoff <brianhk at cs dot washington dot edu> * ext/spc/Makefile.am: * ext/spc/gstspc.c: (gst_spc_dec_class_init), (gst_spc_dec_src_query_type), (gst_spc_dec_init), (gst_spc_dec_dispose), (gst_spc_dec_sink_event), (gst_spc_duration), (gst_spc_fadeout), (gst_spc_dec_src_event), (gst_spc_dec_src_query), (spc_play), (spc_setup): * ext/spc/gstspc.h: * ext/spc/tag.c: (spc_tag_is_extended), (spc_tag_is_text_format), (spc_tag_is_present), (spc_tag_unpack_date), (spc_tag_clear), (spc_tag_get_info), (spc_tag_free): * ext/spc/tag.h: Add support for some essential features like seeking, reading song duration and extended tags. Fixes bug #454151.
This commit is contained in:
Brian Koropoff
Sebastian Dröge
parent
b641c49a4c
commit
61dbbd46cc
6 changed files with 693 additions and 31 deletions
18
ChangeLog
18
ChangeLog
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@ -1,3 +1,21 @@
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2008-05-20 Sebastian Dröge <slomo@circular-chaos.org>
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Patch by: Brian Koropoff <brianhk at cs dot washington dot edu>
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* ext/spc/Makefile.am:
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* ext/spc/gstspc.c: (gst_spc_dec_class_init),
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(gst_spc_dec_src_query_type), (gst_spc_dec_init),
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(gst_spc_dec_dispose), (gst_spc_dec_sink_event),
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(gst_spc_duration), (gst_spc_fadeout), (gst_spc_dec_src_event),
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(gst_spc_dec_src_query), (spc_play), (spc_setup):
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* ext/spc/gstspc.h:
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* ext/spc/tag.c: (spc_tag_is_extended), (spc_tag_is_text_format),
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(spc_tag_is_present), (spc_tag_unpack_date), (spc_tag_clear),
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(spc_tag_get_info), (spc_tag_free):
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* ext/spc/tag.h:
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Add support for some essential features like seeking, reading song
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duration and extended tags. Fixes bug #454151.
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2008-05-19 Sebastian Dröge <slomo@circular-chaos.org>
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* tests/check/elements/deinterleave.c: (GST_START_TEST):
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@ -1,6 +1,6 @@
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plugin_LTLIBRARIES = libgstspc.la
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libgstspc_la_SOURCES = gstspc.c
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libgstspc_la_SOURCES = gstspc.c tag.c
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libgstspc_la_CFLAGS = $(GST_CFLAGS) $(SPC_CFLAGS)
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libgstspc_la_LIBADD = $(GST_LIBS) $(SPC_LIBS)
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305
ext/spc/gstspc.c
305
ext/spc/gstspc.c
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@ -1,5 +1,6 @@
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/* Copyright (C) 2004-2005 Michael Pyne <michael dot pyne at kdemail net>
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* Copyright (C) 2004-2006 Chris Lee <clee at kde org>
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* Copyright (C) 2007 Brian Koropoff <bkoropoff at gmail com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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@ -24,12 +25,14 @@
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#include "gstspc.h"
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#include <string.h>
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#include <glib/gprintf.h>
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#include <glib.h>
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static const GstElementDetails gst_spc_dec_details =
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GST_ELEMENT_DETAILS ("OpenSPC SPC decoder",
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"Codec/Audio/Decoder",
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"Uses OpenSPC to emulate an SPC processor",
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"Chris Lee <clee@kde.org>");
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"Chris Lee <clee@kde.org>, Brian Koropoff <bkoropoff@gmail.com>");
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static GstStaticPadTemplate sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
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@ -52,6 +55,7 @@ static gboolean gst_spc_dec_src_query (GstPad * pad, GstQuery * query);
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static GstStateChangeReturn gst_spc_dec_change_state (GstElement * element,
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GstStateChange transition);
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static void spc_play (GstPad * pad);
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static void gst_spc_dec_dispose (GObject * object);
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static gboolean spc_setup (GstSpcDec * spc);
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static gboolean
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@ -117,15 +121,30 @@ static void
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gst_spc_dec_class_init (GstSpcDecClass * klass)
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{
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GstElementClass *element_class = (GstElementClass *) klass;
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GObjectClass *gobject_class = (GObjectClass *) klass;
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_spc_dec_change_state);
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gobject_class->dispose = gst_spc_dec_dispose;
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}
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static const GstQueryType *
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gst_spc_dec_src_query_type (GstPad * pad)
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{
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static const GstQueryType query_types[] = {
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GST_QUERY_DURATION,
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GST_QUERY_POSITION,
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(GstQueryType) 0
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};
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return query_types;
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}
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static void
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gst_spc_dec_init (GstSpcDec * spc, GstSpcDecClass * klass)
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{
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spc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
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gst_pad_set_query_function (spc->sinkpad, NULL);
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/* gst_pad_set_query_function (spc->sinkpad, NULL); */
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gst_pad_set_event_function (spc->sinkpad, gst_spc_dec_sink_event);
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gst_pad_set_chain_function (spc->sinkpad, gst_spc_dec_chain);
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gst_element_add_pad (GST_ELEMENT (spc), spc->sinkpad);
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@ -133,11 +152,26 @@ gst_spc_dec_init (GstSpcDec * spc, GstSpcDecClass * klass)
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spc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
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gst_pad_set_event_function (spc->srcpad, gst_spc_dec_src_event);
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gst_pad_set_query_function (spc->srcpad, gst_spc_dec_src_query);
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gst_pad_set_query_type_function (spc->srcpad, gst_spc_dec_src_query_type);
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gst_pad_use_fixed_caps (spc->srcpad);
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gst_element_add_pad (GST_ELEMENT (spc), spc->srcpad);
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spc->buf = NULL;
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spc->initialized = FALSE;
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spc_tag_clear (&spc->tag_info);
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}
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static void
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gst_spc_dec_dispose (GObject * object)
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{
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GstSpcDec *spc = GST_SPC_DEC (object);
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if (spc->buf) {
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gst_buffer_unref (spc->buf);
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spc->buf = NULL;
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}
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spc_tag_free (&spc->tag_info);
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}
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static GstFlowReturn
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@ -160,7 +194,7 @@ static gboolean
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gst_spc_dec_sink_event (GstPad * pad, GstEvent * event)
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{
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GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
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gboolean result;
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gboolean result = TRUE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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@ -180,6 +214,38 @@ gst_spc_dec_sink_event (GstPad * pad, GstEvent * event)
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return result;
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}
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static gint64
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gst_spc_duration (GstSpcDec * spc)
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{
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gint64 total_ticks =
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spc->tag_info.time_intro +
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spc->tag_info.time_loop * spc->tag_info.loop_count +
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spc->tag_info.time_end;
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if (total_ticks) {
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return (gint64) gst_util_uint64_scale (total_ticks, GST_SECOND, 64000);
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} else if (spc->tag_info.time_seconds) {
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gint64 time = (gint64) spc->tag_info.time_seconds * GST_SECOND;
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return time;
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} else {
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return (gint64) (3 * 60) * GST_SECOND;
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}
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}
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static gint64
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gst_spc_fadeout (GstSpcDec * spc)
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{
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if (spc->tag_info.time_fade) {
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return (gint64) gst_util_uint64_scale ((guint64) spc->tag_info.time_fade,
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GST_SECOND, 64000);
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} else if (spc->tag_info.time_fade_milliseconds) {
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return (gint64) (spc->tag_info.time_fade_milliseconds * GST_MSECOND);
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} else {
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return 10 * GST_SECOND;
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}
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}
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static gboolean
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gst_spc_dec_src_event (GstPad * pad, GstEvent * event)
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{
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@ -187,6 +253,79 @@ gst_spc_dec_src_event (GstPad * pad, GstEvent * event)
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gboolean result = FALSE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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{
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gdouble rate;
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GstFormat format;
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GstSeekFlags flags;
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GstSeekType start_type, stop_type;
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gint64 start, stop;
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gboolean flush;
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gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
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&stop_type, &stop);
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if (format != GST_FORMAT_TIME) {
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GST_DEBUG_OBJECT (spc, "seeking is only supported in TIME format");
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break;
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}
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if (start_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE) {
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GST_DEBUG_OBJECT (spc, "unsupported seek type");
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break;
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}
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if (stop_type == GST_SEEK_TYPE_NONE)
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stop = GST_CLOCK_TIME_NONE;
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if (start_type == GST_SEEK_TYPE_SET) {
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guint64 cur =
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gst_util_uint64_scale (spc->byte_pos, GST_SECOND, 32000 * 2 * 2);
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guint64 dest = (guint64) start;
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dest = CLAMP (dest, 0, gst_spc_duration (spc) + gst_spc_fadeout (spc));
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if (dest == cur)
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break;
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flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
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if (flush) {
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gst_pad_push_event (spc->srcpad, gst_event_new_flush_start ());
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} else {
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gst_pad_stop_task (spc->srcpad);
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}
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GST_PAD_STREAM_LOCK (spc->srcpad);
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if (flags & GST_SEEK_FLAG_SEGMENT) {
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gst_element_post_message (GST_ELEMENT (spc),
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gst_message_new_segment_start (GST_OBJECT (spc), format, cur));
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}
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if (flush) {
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gst_pad_push_event (spc->srcpad, gst_event_new_flush_stop ());
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}
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if (stop == GST_CLOCK_TIME_NONE)
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stop = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
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gst_pad_push_event (spc->srcpad, gst_event_new_new_segment (FALSE, rate,
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GST_FORMAT_TIME, dest, stop, dest));
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/* spc->byte_pos += OSPC_Run(-1, NULL, (unsigned int) (gst_util_uint64_scale(dest - cur, 32000*2*2, GST_SECOND))); */
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spc->seekpoint =
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gst_util_uint64_scale (dest, 32000 * 2 * 2, GST_SECOND);
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spc->seeking = TRUE;
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gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play,
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spc->srcpad);
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GST_PAD_STREAM_UNLOCK (spc->srcpad);
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result = TRUE;
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}
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break;
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}
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default:
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break;
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}
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@ -204,6 +343,33 @@ gst_spc_dec_src_query (GstPad * pad, GstQuery * query)
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gboolean result = TRUE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_DURATION:
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{
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GstFormat format;
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gst_query_parse_duration (query, &format, NULL);
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if (!spc->initialized || format != GST_FORMAT_TIME) {
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result = FALSE;
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break;
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}
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gst_query_set_duration (query, GST_FORMAT_TIME,
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gst_spc_duration (spc) + gst_spc_fadeout (spc));
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break;
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}
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case GST_QUERY_POSITION:
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{
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GstFormat format;
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gst_query_parse_position (query, &format, NULL);
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if (!spc->initialized || format != GST_FORMAT_TIME) {
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result = FALSE;
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break;
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}
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gst_query_set_position (query, GST_FORMAT_TIME,
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(gint64) gst_util_uint64_scale (spc->byte_pos, GST_SECOND,
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32000 * 2 * 2));
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break;
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}
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default:
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result = gst_pad_query_default (pad, query);
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break;
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@ -220,11 +386,48 @@ spc_play (GstPad * pad)
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GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
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GstFlowReturn flow_return;
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GstBuffer *out;
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gboolean seeking = spc->seeking;
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gint64 duration, fade, end, position;
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out = gst_buffer_new_and_alloc (1600 * 4);
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gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
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if (!seeking) {
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out = gst_buffer_new_and_alloc (1600 * 4);
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gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
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GST_BUFFER_TIMESTAMP (out) =
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(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
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32000 * 2 * 2);
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spc->byte_pos += OSPC_Run (-1, (short *) GST_BUFFER_DATA (out), 1600 * 4);
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} else {
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if (spc->seekpoint < spc->byte_pos) {
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OSPC_Init (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf));
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spc->byte_pos = 0;
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}
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spc->byte_pos += OSPC_Run (-1, NULL, 1600 * 4);
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if (spc->byte_pos >= spc->seekpoint) {
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spc->seeking = FALSE;
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}
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out = gst_buffer_new ();
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gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
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}
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OSPC_Run (-1, (short *) GST_BUFFER_DATA (out), 1600 * 4);
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duration = gst_spc_duration (spc);
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fade = gst_spc_fadeout (spc);
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end = duration + fade;
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position =
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(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
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32000 * 2 * 2);
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if (position >= duration) {
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gint16 *data = (gint16 *) GST_BUFFER_DATA (out);
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guint32 size = GST_BUFFER_SIZE (out) / sizeof (gint16);
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unsigned int i;
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gint64 num = (fade - (position - duration));
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for (i = 0; i < size; i++) {
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/* Apply a parabolic volume envelope */
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data[i] = (gint16) (data[i] * num / fade * num / fade);
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}
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}
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if ((flow_return = gst_pad_push (spc->srcpad, out)) != GST_FLOW_OK) {
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GST_DEBUG_OBJECT (spc, "pausing task, reason %s",
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@ -237,6 +440,11 @@ spc_play (GstPad * pad)
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}
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}
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if (position >= end) {
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gst_pad_pause_task (pad);
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gst_pad_push_event (pad, gst_event_new_eos ());
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}
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gst_object_unref (spc);
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return;
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@ -246,38 +454,69 @@ static gboolean
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spc_setup (GstSpcDec * spc)
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{
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guchar *data = GST_BUFFER_DATA (spc->buf);
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gboolean text_format = FALSE;
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if (!spc_negotiate (spc)) {
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return FALSE;
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}
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if (data[0x23] == 26) {
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GstEvent *tagevent;
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GstTagList *taglist = gst_tag_list_new ();
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spc_tag_info *info = &(spc->tag_info);
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if (data[0xA0] == '/')
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text_format = TRUE;
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spc_tag_get_info (data, GST_BUFFER_SIZE (spc->buf), info);
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gchar spctitle[0x21];
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gchar spcartist[0x21];
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gchar spcgame[0x21];
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GstTagList *taglist = gst_tag_list_new ();
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strncpy (spctitle, (gchar *) & data[0x2E], 32);
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strncpy (spcartist, (gchar *) & data[(text_format ? 0xB1 : 0xB0)], 32);
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strncpy (spcgame, (gchar *) & data[0x4E], 32);
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if (info->title)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TITLE,
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info->title, NULL);
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if (info->artist)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ARTIST,
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info->artist, NULL);
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/* Prefer the name of the official soundtrack over the name of the game (since this is
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* how track numbers are derived)
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*/
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if (info->album)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM,
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info->album, NULL);
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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);
|
||||
|
||||
spctitle[0x20] = '\0';
|
||||
spcartist[0x20] = '\0';
|
||||
spcgame[0x20] = '\0';
|
||||
|
||||
gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND,
|
||||
GST_TAG_TITLE, spctitle,
|
||||
GST_TAG_ARTIST, spcartist, GST_TAG_ALBUM, spcgame, NULL);
|
||||
|
||||
tagevent = gst_event_new_tag (taglist);
|
||||
gst_element_found_tags_for_pad (GST_ELEMENT (spc), spc->srcpad, taglist);
|
||||
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);
|
||||
|
||||
guint64 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); */
|
||||
|
||||
|
||||
if (OSPC_Init (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf)) != 0) {
|
||||
return FALSE;
|
||||
|
|
@ -288,9 +527,15 @@ spc_setup (GstSpcDec * spc)
|
|||
|
||||
gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play, spc->srcpad);
|
||||
|
||||
gst_buffer_unref (spc->buf);
|
||||
spc->buf = 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;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,5 +1,6 @@
|
|||
/* 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
|
||||
|
|
@ -24,6 +25,8 @@
|
|||
|
||||
#include <openspc.h>
|
||||
|
||||
#include "tag.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define GST_TYPE_SPC_DEC \
|
||||
|
|
@ -49,6 +52,12 @@ struct _GstSpcDec
|
|||
|
||||
GstBuffer *buf;
|
||||
gboolean initialized;
|
||||
gboolean seeking;
|
||||
guint32 seekpoint;
|
||||
|
||||
spc_tag_info tag_info;
|
||||
|
||||
guint32 byte_pos;
|
||||
};
|
||||
|
||||
struct _GstSpcDecClass
|
||||
|
|
|
|||
353
ext/spc/tag.c
Normal file
353
ext/spc/tag.c
Normal file
|
|
@ -0,0 +1,353 @@
|
|||
/* 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);
|
||||
}
|
||||
37
ext/spc/tag.h
Normal file
37
ext/spc/tag.h
Normal file
|
|
@ -0,0 +1,37 @@
|
|||
/* 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/gtypes.h>
|
||||
#include <glib.h>
|
||||
|
||||
typedef struct
|
||||
{
|
||||
gchar *title, *game, *artist, *album, *publisher;
|
||||
gchar *dumper, *comment;
|
||||
enum { EMU_SNES9X = 2, EMU_ZSNES = 1, EMU_UNKNOWN = 0 } emulator;
|
||||
guint8 track, disc, muted, loop_count;
|
||||
guint16 year;
|
||||
guint32 time_seconds, time_fade_milliseconds;
|
||||
guint32 time_intro, time_loop, time_end, time_fade;
|
||||
guint32 amplification;
|
||||
GDate *dump_date;
|
||||
} spc_tag_info;
|
||||
|
||||
void spc_tag_clear(spc_tag_info* info);
|
||||
void spc_tag_get_info(guchar* data, guint length, spc_tag_info* info);
|
||||
void spc_tag_free(spc_tag_info* info);
|
||||
Loading…
Reference in a new issue