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-rw-r--r--src/decoder/gme_decoder_plugin.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/src/decoder/gme_decoder_plugin.c b/src/decoder/gme_decoder_plugin.c
new file mode 100644
index 000000000..4a5220a3f
--- /dev/null
+++ b/src/decoder/gme_decoder_plugin.c
@@ -0,0 +1,244 @@
+#include "config.h"
+#include "../decoder_api.h"
+#include "audio_check.h"
+#include "uri.h"
+
+#include <glib.h>
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <gme/gme.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "gme"
+
+#define SUBTUNE_PREFIX "tune_"
+
+enum {
+ GME_SAMPLE_RATE = 44100,
+ GME_CHANNELS = 2,
+ GME_BUFFER_FRAMES = 2048,
+ GME_BUFFER_SAMPLES = GME_BUFFER_FRAMES * GME_CHANNELS,
+};
+
+/**
+ * returns the file path stripped of any /tune_xxx.* subtune
+ * suffix
+ */
+static char *
+get_container_name(const char *path_fs)
+{
+ const char *subtune_suffix = uri_get_suffix(path_fs);
+ char *path_container = g_strdup(path_fs);
+ char *pat = g_strconcat("*/" SUBTUNE_PREFIX "???.", subtune_suffix, NULL);
+ GPatternSpec *path_with_subtune = g_pattern_spec_new(pat);
+ g_free(pat);
+ if (!g_pattern_match(path_with_subtune,
+ strlen(path_container), path_container, NULL)) {
+ g_pattern_spec_free(path_with_subtune);
+ return path_container;
+ }
+
+ char *ptr = g_strrstr(path_container, "/" SUBTUNE_PREFIX);
+ if (ptr != NULL)
+ *ptr='\0';
+
+ g_pattern_spec_free(path_with_subtune);
+ return path_container;
+}
+
+/**
+ * returns tune number from file.nsf/tune_xxx.* style path or 0 if no subtune
+ * is appended.
+ */
+static int
+get_song_num(const char *path_fs)
+{
+ const char *subtune_suffix = uri_get_suffix(path_fs);
+ char *pat = g_strconcat("*/" SUBTUNE_PREFIX "???.", subtune_suffix, NULL);
+ GPatternSpec *path_with_subtune = g_pattern_spec_new(pat);
+ g_free(pat);
+
+ if (g_pattern_match(path_with_subtune,
+ strlen(path_fs), path_fs, NULL)) {
+ char *sub = g_strrstr(path_fs, "/" SUBTUNE_PREFIX);
+ g_pattern_spec_free(path_with_subtune);
+ if(!sub)
+ return 0;
+
+ sub += strlen("/" SUBTUNE_PREFIX);
+ int song_num = strtol(sub, NULL, 10);
+
+ return song_num - 1;
+ } else {
+ g_pattern_spec_free(path_with_subtune);
+ return 0;
+ }
+}
+
+static char *
+gme_container_scan(const char *path_fs, const unsigned int tnum)
+{
+ Music_Emu *emu;
+ const char* gme_err;
+ unsigned int num_songs;
+
+ gme_err = gme_open_file(path_fs, &emu, GME_SAMPLE_RATE);
+ if (gme_err != NULL) {
+ g_warning("%s", gme_err);
+ return NULL;
+ }
+
+ num_songs = gme_track_count(emu);
+ /* if it only contains a single tune, don't treat as container */
+ if (num_songs < 2)
+ return NULL;
+
+ const char *subtune_suffix = uri_get_suffix(path_fs);
+ if (tnum <= num_songs){
+ char *subtune = g_strdup_printf(
+ SUBTUNE_PREFIX "%03u.%s", tnum, subtune_suffix);
+ return subtune;
+ } else
+ return NULL;
+}
+
+static void
+gme_file_decode(struct decoder *decoder, const char *path_fs)
+{
+ float song_len;
+ Music_Emu *emu;
+ gme_info_t *ti;
+ struct audio_format audio_format;
+ enum decoder_command cmd;
+ short buf[GME_BUFFER_SAMPLES];
+ const char* gme_err;
+ char *path_container = get_container_name(path_fs);
+ int song_num = get_song_num(path_fs);
+
+ gme_err = gme_open_file(path_container, &emu, GME_SAMPLE_RATE);
+ g_free(path_container);
+ if (gme_err != NULL) {
+ g_warning("%s", gme_err);
+ return;
+ }
+
+ if((gme_err = gme_track_info(emu, &ti, song_num)) != NULL){
+ g_warning("%s", gme_err);
+ gme_delete(emu);
+ return;
+ }
+
+ if(ti->length > 0)
+ song_len = ti->length / 1000.0;
+ else song_len = -1;
+
+ /* initialize the MPD decoder */
+
+ GError *error = NULL;
+ if (!audio_format_init_checked(&audio_format, GME_SAMPLE_RATE,
+ SAMPLE_FORMAT_S16, GME_CHANNELS,
+ &error)) {
+ g_warning("%s", error->message);
+ g_error_free(error);
+ gme_free_info(ti);
+ gme_delete(emu);
+ return;
+ }
+
+ decoder_initialized(decoder, &audio_format, true, song_len);
+
+ if((gme_err = gme_start_track(emu, song_num)) != NULL)
+ g_warning("%s", gme_err);
+
+ /* play */
+ do {
+ gme_err = gme_play(emu, GME_BUFFER_SAMPLES, buf);
+ if (gme_err != NULL) {
+ g_warning("%s", gme_err);
+ return;
+ }
+ cmd = decoder_data(decoder, NULL, buf, sizeof(buf), 0);
+
+ if(cmd == DECODE_COMMAND_SEEK) {
+ float where = decoder_seek_where(decoder);
+ if((gme_err = gme_seek(emu, (int)where*1000)) != NULL)
+ g_warning("%s", gme_err);
+ decoder_command_finished(decoder);
+ }
+
+ if(gme_track_ended(emu))
+ break;
+ } while(cmd != DECODE_COMMAND_STOP);
+
+ gme_free_info(ti);
+ gme_delete(emu);
+}
+
+static struct tag *
+gme_tag_dup(const char *path_fs)
+{
+ Music_Emu *emu;
+ gme_info_t *ti;
+ const char* gme_err;
+ char *path_container=get_container_name(path_fs);
+ int song_num;
+ song_num=get_song_num(path_fs);
+
+ gme_err = gme_open_file(path_container, &emu, GME_SAMPLE_RATE);
+ g_free(path_container);
+ if (gme_err != NULL) {
+ g_warning("%s", gme_err);
+ return NULL;
+ }
+ if((gme_err = gme_track_info(emu, &ti, song_num)) != NULL){
+ g_warning("%s", gme_err);
+ gme_delete(emu);
+ return NULL;
+ }
+
+ struct tag *tag = tag_new();
+ if(ti != NULL){
+ if(ti->length > 0)
+ tag->time = ti->length / 1000;
+ if(ti->song != NULL){
+ if(gme_track_count(emu) > 1){
+ /* start numbering subtunes from 1 */
+ char *tag_title=g_strdup_printf("%s (%d/%d)",
+ ti->song, song_num+1, gme_track_count(emu));
+ tag_add_item(tag, TAG_TITLE, tag_title);
+ g_free(tag_title);
+ }else
+ tag_add_item(tag, TAG_TITLE, ti->song);
+ }
+ if(ti->author != NULL)
+ tag_add_item(tag, TAG_ARTIST, ti->author);
+ if(ti->game != NULL)
+ tag_add_item(tag, TAG_ALBUM, ti->game);
+ if(ti->comment != NULL)
+ tag_add_item(tag, TAG_COMMENT, ti->comment);
+ if(ti->copyright != NULL)
+ tag_add_item(tag, TAG_DATE, ti->copyright);
+ }
+
+ gme_free_info(ti);
+ gme_delete(emu);
+ return tag;
+}
+
+static const char *const gme_suffixes[] = {
+ "ay", "gbs", "gym", "hes", "kss", "nsf",
+ "nsfe", "sap", "spc", "vgm", "vgz",
+ NULL
+};
+
+extern const struct decoder_plugin gme_decoder_plugin;
+const struct decoder_plugin gme_decoder_plugin = {
+ .name = "gme",
+ .file_decode = gme_file_decode,
+ .tag_dup = gme_tag_dup,
+ .suffixes = gme_suffixes,
+ .container_scan = gme_container_scan,
+};