fix bug: source file needs to be explicitly rewound before reading/writing in callbac...
[flac.git] / src / plugin_xmms / plugin.c
index 2792e94..e20b0ef 100644 (file)
@@ -1,5 +1,5 @@
 /* libxmms-flac - XMMS FLAC input plugin
- * Copyright (C) 2000  Josh Coalson
+ * Copyright (C) 2000,2001,2002,2003,2004  Josh Coalson
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
-#include <assert.h>
 #include <glib.h>
 
-#include "xmms/plugin.h"
-#include "xmms/util.h"
-#include "FLAC/all.h"
+#include <xmms/plugin.h>
+#include <xmms/util.h>
+#include <xmms/configfile.h>
+#include <xmms/titlestring.h>
 
-typedef struct {
-       byte raw[128];
-       char title[31];
-       char artist[31];
-       char album[31];
-       char comment[31];
-       unsigned year;
-       unsigned track; /* may be 0 if v1 (not v1.1) tag */
-       unsigned genre;
-       char description[1024]; /* the formatted description passed to xmms */
-} id3v1_struct;
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef HAVE_LANGINFO_CODESET
+#include <langinfo.h>
+#endif
+
+#include "FLAC/all.h"
+#include "plugin_common/all.h"
+#include "share/grabbag.h"
+#include "share/replaygain_synthesis.h"
+#include "configure.h"
+#include "wrap_id3.h"
+#include "charset.h"
+
+#ifdef min
+#undef min
+#endif
+#define min(x,y) ((x)<(y)?(x):(y))
+
+/* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
+#ifdef _MSC_VER
+#define FLAC__U64L(x) x
+#else
+#define FLAC__U64L(x) x##LLU
+#endif
+
+extern void FLAC_XMMS__file_info_box(char *filename);
 
 typedef struct {
-       bool abort_flag;
-       bool is_playing;
-       bool eof;
+       FLAC__bool abort_flag;
+       FLAC__bool is_playing;
+       FLAC__bool eof;
+       FLAC__bool play_thread_open; /* if true, is_playing must also be true */
        unsigned total_samples;
        unsigned bits_per_sample;
        unsigned channels;
        unsigned sample_rate;
        unsigned length_in_msec;
+       gchar *title;
+       AFormat sample_format;
+       unsigned sample_format_bytes_per_sample;
        int seek_to_in_sec;
+       FLAC__bool has_replaygain;
+       double replay_scale;
+       DitherContext dither_context;
 } file_info_struct;
 
 static void FLAC_XMMS__init();
@@ -62,21 +87,21 @@ static void FLAC_XMMS__cleanup();
 static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length);
 
 static void *play_loop_(void *arg);
-static bool decoder_init_(const char *filename);
-static bool get_id3v1_tag_(const char *filename, id3v1_struct *tag);
-static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data);
-static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
+static FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder);
+static void safe_decoder_finish_(FLAC__FileDecoder *decoder);
+static void safe_decoder_delete_(FLAC__FileDecoder *decoder);
+static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
+static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 
-
 InputPlugin flac_ip =
 {
        NULL,
        NULL,
-       "FLAC Player v" FLAC__VERSION_STRING,
+       "Reference FLAC Player v" VERSION,
        FLAC_XMMS__init,
-       NULL,
-       NULL,
+       FLAC_XMMS__aboutbox,
+       FLAC_XMMS__configure,
        FLAC_XMMS__is_our_file,
        NULL,
        FLAC_XMMS__play_file,
@@ -93,26 +118,84 @@ InputPlugin flac_ip =
        NULL,
        NULL,
        FLAC_XMMS__get_song_info,
-       NULL,                   /* file_info_box */
+       FLAC_XMMS__file_info_box,
        NULL
 };
 
-static int16 reservoir_[FLAC__MAX_BLOCK_SIZE * 2]; /* 2 for max channels */
-static unsigned reservoir_samples_;
-static FLAC__FileDecoder *decoder_;
+#define SAMPLES_PER_WRITE 512
+#define SAMPLE_BUFFER_SIZE ((FLAC__MAX_BLOCK_SIZE + SAMPLES_PER_WRITE) * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8))
+static FLAC__byte sample_buffer_[SAMPLE_BUFFER_SIZE];
+static unsigned sample_buffer_first_, sample_buffer_last_;
+
+static FLAC__FileDecoder *decoder_ = 0;
 static file_info_struct file_info_;
 static pthread_t decode_thread_;
-static bool audio_error_ = false;
+static FLAC__bool audio_error_ = false;
+static FLAC__bool is_big_endian_host_;
+
+#define BITRATE_HIST_SEGMENT_MSEC 500
+/* 500ms * 50 = 25s should be enough */
+#define BITRATE_HIST_SIZE 50
+static unsigned bitrate_history_[BITRATE_HIST_SIZE];
+
 
 InputPlugin *get_iplugin_info()
 {
-       flac_ip.description = g_strdup_printf("FLAC Player v%u.%u", FLAC__MAJOR_VERSION, FLAC__MINOR_VERSION);
+       flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING);
        return &flac_ip;
 }
 
 void FLAC_XMMS__init()
 {
-       decoder_ = FLAC__file_decoder_get_new_instance();
+       ConfigFile *cfg;
+       FLAC__uint32 test = 1;
+       is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
+
+       flac_cfg.title.tag_override = FALSE;
+       g_free(flac_cfg.title.tag_format);
+       flac_cfg.title.convert_char_set = FALSE;
+
+       cfg = xmms_cfg_open_default_file();
+
+       /* title */
+
+       xmms_cfg_read_boolean(cfg, "flac", "title.tag_override", &flac_cfg.title.tag_override);
+
+       if(!xmms_cfg_read_string(cfg, "flac", "title.tag_format", &flac_cfg.title.tag_format))
+               flac_cfg.title.tag_format = g_strdup("%p - %t");
+
+       xmms_cfg_read_boolean(cfg, "flac", "title.convert_char_set", &flac_cfg.title.convert_char_set);
+
+       if(!xmms_cfg_read_string(cfg, "flac", "title.file_char_set", &flac_cfg.title.file_char_set))
+               flac_cfg.title.file_char_set = FLAC_plugin__charset_get_current();
+
+       if(!xmms_cfg_read_string(cfg, "flac", "title.user_char_set", &flac_cfg.title.user_char_set))
+               flac_cfg.title.user_char_set = FLAC_plugin__charset_get_current();
+
+       /* replaygain */
+
+       xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.enable", &flac_cfg.output.replaygain.enable);
+
+       xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.album_mode", &flac_cfg.output.replaygain.album_mode);
+
+       if(!xmms_cfg_read_int(cfg, "flac", "output.replaygain.preamp", &flac_cfg.output.replaygain.preamp))
+               flac_cfg.output.replaygain.preamp = 0;
+
+       xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.hard_limit", &flac_cfg.output.replaygain.hard_limit);
+
+       xmms_cfg_read_boolean(cfg, "flac", "output.resolution.normal.dither_24_to_16", &flac_cfg.output.resolution.normal.dither_24_to_16);
+       xmms_cfg_read_boolean(cfg, "flac", "output.resolution.replaygain.dither", &flac_cfg.output.resolution.replaygain.dither);
+
+       if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.noise_shaping", &flac_cfg.output.resolution.replaygain.noise_shaping))
+               flac_cfg.output.resolution.replaygain.noise_shaping = 1;
+
+       if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.bps_out", &flac_cfg.output.resolution.replaygain.bps_out))
+               flac_cfg.output.resolution.replaygain.bps_out = 16;
+
+       decoder_ = FLAC__file_decoder_new();
+
+       xmms_cfg_free(cfg);
 }
 
 int FLAC_XMMS__is_our_file(char *filename)
@@ -120,8 +203,8 @@ int FLAC_XMMS__is_our_file(char *filename)
        char *ext;
 
        ext = strrchr(filename, '.');
-       if (ext)
-               if (!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
+       if(ext)
+               if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
                        return 1;
        return 0;
 }
@@ -129,31 +212,71 @@ int FLAC_XMMS__is_our_file(char *filename)
 void FLAC_XMMS__play_file(char *filename)
 {
        FILE *f;
-       id3v1_struct tag;
+
+       sample_buffer_first_ = sample_buffer_last_ = 0;
+       audio_error_ = false;
+       file_info_.abort_flag = false;
+       file_info_.is_playing = false;
+       file_info_.eof = false;
+       file_info_.play_thread_open = false;
+       file_info_.has_replaygain = false;
 
        if(0 == (f = fopen(filename, "r")))
                return;
        fclose(f);
 
-       if(!decoder_init_(filename))
+       if(decoder_ == 0)
                return;
 
-       reservoir_samples_ = 0;
-       audio_error_ = false;
+       if(!safe_decoder_init_(filename, decoder_))
+               return;
+
+       if(file_info_.has_replaygain && flac_cfg.output.replaygain.enable) {
+               if(flac_cfg.output.resolution.replaygain.bps_out == 8) {
+                       file_info_.sample_format = FMT_U8;
+                       file_info_.sample_format_bytes_per_sample = 1;
+               }
+               else if(flac_cfg.output.resolution.replaygain.bps_out == 16) {
+                       file_info_.sample_format = (is_big_endian_host_) ? FMT_S16_BE : FMT_S16_LE;
+                       file_info_.sample_format_bytes_per_sample = 2;
+               }
+               else {
+                       /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
+                       fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", flac_cfg.output.resolution.replaygain.bps_out);
+                       safe_decoder_finish_(decoder_);
+                       return;
+               }
+       }
+       else {
+               if(file_info_.bits_per_sample == 8) {
+                       file_info_.sample_format = FMT_U8;
+                       file_info_.sample_format_bytes_per_sample = 1;
+               }
+               else if(file_info_.bits_per_sample == 16 || (file_info_.bits_per_sample == 24 && flac_cfg.output.resolution.normal.dither_24_to_16)) {
+                       file_info_.sample_format = (is_big_endian_host_) ? FMT_S16_BE : FMT_S16_LE;
+                       file_info_.sample_format_bytes_per_sample = 2;
+               }
+               else {
+                       /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
+                       fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", file_info_.bits_per_sample);
+                       safe_decoder_finish_(decoder_);
+                       return;
+               }
+       }
+       FLAC__replaygain_synthesis__init_dither_context(&file_info_.dither_context, file_info_.sample_format_bytes_per_sample * 8, flac_cfg.output.resolution.replaygain.noise_shaping);
        file_info_.is_playing = true;
-       file_info_.eof = false;
 
-       if (flac_ip.output->open_audio(FMT_S16_NE, file_info_.sample_rate, file_info_.channels) == 0) {
+       if(flac_ip.output->open_audio(file_info_.sample_format, file_info_.sample_rate, file_info_.channels) == 0) {
                audio_error_ = true;
-               if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
-                       FLAC__file_decoder_finish(decoder_);
+               safe_decoder_finish_(decoder_);
                return;
        }
 
-       (void)get_id3v1_tag_(filename, &tag);
-       flac_ip.set_info(tag.description, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
+       file_info_.title = flac_format_song_title(filename);
+       flac_ip.set_info(file_info_.title, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
 
        file_info_.seek_to_in_sec = -1;
+       file_info_.play_thread_open = true;
        pthread_create(&decode_thread_, NULL, play_loop_, NULL);
 }
 
@@ -161,10 +284,12 @@ void FLAC_XMMS__stop()
 {
        if(file_info_.is_playing) {
                file_info_.is_playing = false;
-               pthread_join(decode_thread_, NULL);
+               if(file_info_.play_thread_open) {
+                       file_info_.play_thread_open = false;
+                       pthread_join(decode_thread_, NULL);
+               }
                flac_ip.output->close_audio();
-               if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
-                       FLAC__file_decoder_finish(decoder_);
+               safe_decoder_finish_(decoder_);
        }
 }
 
@@ -194,43 +319,34 @@ int FLAC_XMMS__get_time()
 
 void FLAC_XMMS__cleanup()
 {
-       if(decoder_)
-               FLAC__file_decoder_free_instance(decoder_);
+       safe_decoder_delete_(decoder_);
+       decoder_ = 0;
 }
 
 void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
 {
-       id3v1_struct tag;
+       FLAC__StreamMetadata streaminfo;
 
-       if(title) {
-               (void)get_id3v1_tag_(filename, &tag);
-               *title = g_malloc(strlen(tag.description)+1);
-               strcpy(*title, tag.description);
-       }
-       if(length_in_msec) {
-               FLAC__FileDecoder *tmp_decoder = FLAC__file_decoder_get_new_instance();
-               file_info_struct tmp_file_info;
-               if(0 == tmp_decoder) {
-                       *length_in_msec = -1;
-                       return;
-               }
-               tmp_file_info.abort_flag = false;
-               tmp_decoder->check_md5 = false; /* turn off MD5 checking in the decoder */
-               if(FLAC__file_decoder_init(tmp_decoder, filename, write_callback_, metadata_callback_, error_callback_, &tmp_file_info) != FLAC__FILE_DECODER_OK) {
-                       *length_in_msec = -1;
-                       return;
+       if(0 == filename)
+               filename = "";
+
+       if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
+               /* @@@ how to report the error? */
+               if(title) {
+                       static const char *errtitle = "Invalid FLAC File: ";
+                       *title = g_malloc(strlen(errtitle) + 1 + strlen(filename) + 1 + 1);
+                       sprintf(*title, "%s\"%s\"", errtitle, filename);
                }
-               if(!FLAC__file_decoder_process_metadata(tmp_decoder)) {
+               if(length_in_msec)
                        *length_in_msec = -1;
-                       return;
-               }
-
-               *length_in_msec = (int)tmp_file_info.length_in_msec;
+               return;
+       }
 
-               if(tmp_decoder->state != FLAC__FILE_DECODER_UNINITIALIZED)
-                       FLAC__file_decoder_finish(tmp_decoder);
-               FLAC__file_decoder_free_instance(tmp_decoder);
+       if(title) {
+               *title = flac_format_song_title(filename);
        }
+       if(length_in_msec)
+               *length_in_msec = streaminfo.data.stream_info.total_samples * 10 / (streaminfo.data.stream_info.sample_rate / 100);
 }
 
 /***********************************************************************
@@ -239,20 +355,60 @@ void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
 
 void *play_loop_(void *arg)
 {
+       unsigned written_time_last = 0, bh_index_last_w = 0, bh_index_last_o = BITRATE_HIST_SIZE, blocksize = 1;
+       FLAC__uint64 decode_position_last = 0, decode_position_frame_last = 0, decode_position_frame = 0;
 
        (void)arg;
 
        while(file_info_.is_playing) {
                if(!file_info_.eof) {
-                       (void)FLAC__file_decoder_process_one_frame(decoder_);
-                       if(reservoir_samples_ > 0) {
-                               unsigned bytes = reservoir_samples_ * ((file_info_.bits_per_sample+7)/8) * file_info_.channels;
-                               flac_ip.add_vis_pcm(flac_ip.output->written_time(), FMT_S16_NE, file_info_.channels, bytes, (char*)reservoir_);
+                       while(sample_buffer_last_ - sample_buffer_first_ < SAMPLES_PER_WRITE) {
+                               unsigned s;
+
+                               s = sample_buffer_last_ - sample_buffer_first_;
+                               if(FLAC__file_decoder_get_state(decoder_) == FLAC__FILE_DECODER_END_OF_FILE) {
+                                       file_info_.eof = true;
+                                       break;
+                               }
+                               else if(!FLAC__file_decoder_process_single(decoder_)) {
+                                       /*@@@ this should probably be a dialog */
+                                       fprintf(stderr, "libxmms-flac: READ ERROR processing frame\n");
+                                       file_info_.eof = true;
+                                       break;
+                               }
+                               blocksize = sample_buffer_last_ - sample_buffer_first_ - s;
+                               decode_position_frame_last = decode_position_frame;
+                               if(!FLAC__file_decoder_get_decode_position(decoder_, &decode_position_frame))
+                                       decode_position_frame = 0;
+                       }
+                       if(sample_buffer_last_ - sample_buffer_first_ > 0) {
+                               const unsigned n = min(sample_buffer_last_ - sample_buffer_first_, SAMPLES_PER_WRITE);
+                               int bytes = n * file_info_.channels * file_info_.sample_format_bytes_per_sample;
+                               FLAC__byte *sample_buffer_start = sample_buffer_ + sample_buffer_first_ * file_info_.channels * file_info_.sample_format_bytes_per_sample;
+                               unsigned written_time, bh_index_w;
+                               FLAC__uint64 decode_position;
+
+                               sample_buffer_first_ += n;
+                               flac_ip.add_vis_pcm(flac_ip.output->written_time(), file_info_.sample_format, file_info_.channels, bytes, sample_buffer_start);
                                while(flac_ip.output->buffer_free() < (int)bytes && file_info_.is_playing && file_info_.seek_to_in_sec == -1)
                                        xmms_usleep(10000);
                                if(file_info_.is_playing && file_info_.seek_to_in_sec == -1)
-                                       flac_ip.output->write_audio((char*)reservoir_, bytes);
-                               reservoir_samples_ = 0;
+                                       flac_ip.output->write_audio(sample_buffer_start, bytes);
+
+                               /* compute current bitrate */
+
+                               written_time = flac_ip.output->written_time();
+                               bh_index_w = written_time / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
+                               if(bh_index_w != bh_index_last_w) {
+                                       bh_index_last_w = bh_index_w;
+                                       decode_position = decode_position_frame - (double)(sample_buffer_last_ - sample_buffer_first_) * (double)(decode_position_frame - decode_position_frame_last) / (double)blocksize;
+                                       bitrate_history_[(bh_index_w + BITRATE_HIST_SIZE - 1) % BITRATE_HIST_SIZE] =
+                                               decode_position > decode_position_last && written_time > written_time_last ?
+                                                       8000 * (decode_position - decode_position_last) / (written_time - written_time_last) :
+                                                       file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample;
+                                       decode_position_last = decode_position;
+                                       written_time_last = written_time;
+                               }
                        }
                        else {
                                file_info_.eof = true;
@@ -261,129 +417,158 @@ void *play_loop_(void *arg)
                }
                else
                        xmms_usleep(10000);
-               if (file_info_.seek_to_in_sec != -1) {
+               if(file_info_.seek_to_in_sec != -1) {
                        const double distance = (double)file_info_.seek_to_in_sec * 1000.0 / (double)file_info_.length_in_msec;
                        unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
-                       if(FLAC__file_decoder_seek_absolute(decoder_, (uint64)target_sample)) {
+                       if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
                                flac_ip.output->flush(file_info_.seek_to_in_sec * 1000);
+                               bh_index_last_w = bh_index_last_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
+                               if(!FLAC__file_decoder_get_decode_position(decoder_, &decode_position_frame))
+                                       decode_position_frame = 0;
                                file_info_.seek_to_in_sec = -1;
                                file_info_.eof = false;
+                               sample_buffer_first_ = sample_buffer_last_ = 0;
+                       }
+               }
+               else {
+                       /* display the right bitrate from history */
+                       unsigned bh_index_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
+                       if(bh_index_o != bh_index_last_o && bh_index_o != bh_index_last_w && bh_index_o != (bh_index_last_w + 1) % BITRATE_HIST_SIZE) {
+                               bh_index_last_o = bh_index_o;
+                               flac_ip.set_info(file_info_.title, file_info_.length_in_msec, bitrate_history_[bh_index_o], file_info_.sample_rate, file_info_.channels);
                        }
                }
-
        }
-       if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
-               FLAC__file_decoder_finish(decoder_);
+
+       safe_decoder_finish_(decoder_);
 
        /* are these two calls necessary? */
        flac_ip.output->buffer_free();
        flac_ip.output->buffer_free();
 
+       g_free(file_info_.title);
+
        pthread_exit(NULL);
        return 0; /* to silence the compiler warning about not returning a value */
 }
 
-bool decoder_init_(const char *filename)
+FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder)
 {
-       if(decoder_ == 0)
+       if(decoder == 0)
                return false;
 
-       decoder_->check_md5 = false; /* turn off MD5 checking in the decoder */
-
-       if(FLAC__file_decoder_init(decoder_, filename, write_callback_, metadata_callback_, error_callback_, &file_info_) != FLAC__FILE_DECODER_OK)
+       safe_decoder_finish_(decoder);
+
+       FLAC__file_decoder_set_md5_checking(decoder, false);
+       FLAC__file_decoder_set_filename(decoder, filename);
+       FLAC__file_decoder_set_metadata_ignore_all(decoder);
+       FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
+       FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
+       FLAC__file_decoder_set_write_callback(decoder, write_callback_);
+       FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
+       FLAC__file_decoder_set_error_callback(decoder, error_callback_);
+       FLAC__file_decoder_set_client_data(decoder, &file_info_);
+       if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK)
                return false;
 
-       file_info_.abort_flag = false;
-
-       if(!FLAC__file_decoder_process_metadata(decoder_))
+       if(!FLAC__file_decoder_process_until_end_of_metadata(decoder))
                return false;
 
        return true;
 }
 
-bool get_id3v1_tag_(const char *filename, id3v1_struct *tag)
+void safe_decoder_finish_(FLAC__FileDecoder *decoder)
 {
-       const char *temp;
-       FILE *f = fopen(filename, "rb");
-       memset(tag, 0, sizeof(id3v1_struct));
-
-       /* set the description to the filename by default */
-       temp = strrchr(filename, '/');
-       if(!temp)
-               temp = filename;
-       else
-               temp++;
-       strcpy(tag->description, temp);
-       *strrchr(tag->description, '.') = '\0';
-
-       if(0 == f)
-               return false;
-       if(-1 == fseek(f, -128, SEEK_END)) {
-               fclose(f);
-               return false;
-       }
-       if(fread(tag->raw, 1, 128, f) < 128) {
-               fclose(f);
-               return false;
-       }
-       fclose(f);
-       if(strncmp(tag->raw, "TAG", 3))
-               return false;
-       else {
-               char year_str[5];
-
-               memcpy(tag->title, tag->raw+3, 30);
-               memcpy(tag->artist, tag->raw+33, 30);
-               memcpy(tag->album, tag->raw+63, 30);
-               memcpy(year_str, tag->raw+93, 4); year_str[4] = '\0'; tag->year = atoi(year_str);
-               memcpy(tag->comment, tag->raw+97, 30);
-               tag->genre = (unsigned)((byte)tag->raw[127]);
-               tag->track = (unsigned)((byte)tag->raw[126]);
-
-               sprintf(tag->description, "%s - %s", tag->artist, tag->title);
+       if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
+               FLAC__file_decoder_finish(decoder);
+}
 
-               return true;
+void safe_decoder_delete_(FLAC__FileDecoder *decoder)
+{
+       if(decoder) {
+               safe_decoder_finish_(decoder);
+               FLAC__file_decoder_delete(decoder);
        }
 }
 
-FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data)
+FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 {
        file_info_struct *file_info = (file_info_struct *)client_data;
-       unsigned bps = file_info->bits_per_sample, channels = file_info->channels;
-       unsigned wide_samples = header->blocksize, wide_sample, sample, channel;
+       const unsigned channels = file_info->channels, wide_samples = frame->header.blocksize;
+       const unsigned bits_per_sample = file_info->bits_per_sample;
+       FLAC__byte *sample_buffer_start;
 
        (void)decoder;
 
        if(file_info->abort_flag)
-               return FLAC__STREAM_DECODER_WRITE_ABORT;
-
-       assert(bps == 16);
+               return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 
-       for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
-               for(channel = 0; channel < channels; channel++, sample++)
-                       reservoir_[sample] = (int16)buffer[channel][wide_sample];
+       if((sample_buffer_last_ + wide_samples) > (SAMPLE_BUFFER_SIZE / (channels * file_info->sample_format_bytes_per_sample))) {
+               memmove(sample_buffer_, sample_buffer_ + sample_buffer_first_ * channels * file_info->sample_format_bytes_per_sample, (sample_buffer_last_ - sample_buffer_first_) * channels * file_info->sample_format_bytes_per_sample);
+               sample_buffer_last_ -= sample_buffer_first_;
+               sample_buffer_first_ = 0;
+       }
+       sample_buffer_start = sample_buffer_ + sample_buffer_last_ * channels * file_info->sample_format_bytes_per_sample;
+       if(file_info->has_replaygain && flac_cfg.output.replaygain.enable) {
+               FLAC__replaygain_synthesis__apply_gain(
+                               sample_buffer_start,
+                               !is_big_endian_host_,
+                               file_info->sample_format_bytes_per_sample == 1, /* unsigned_data_out */
+                               buffer,
+                               wide_samples,
+                               channels,
+                               bits_per_sample,
+                               file_info->sample_format_bytes_per_sample * 8,
+                               file_info->replay_scale,
+                               flac_cfg.output.replaygain.hard_limit,
+                               flac_cfg.output.resolution.replaygain.dither,
+                               &file_info->dither_context
+               );
+       }
+       else if(is_big_endian_host_) {
+               FLAC__plugin_common__pack_pcm_signed_big_endian(
+                       sample_buffer_start,
+                       buffer,
+                       wide_samples,
+                       channels,
+                       bits_per_sample,
+                       file_info->sample_format_bytes_per_sample * 8
+               );
+       }
+       else {
+               FLAC__plugin_common__pack_pcm_signed_little_endian(
+                       sample_buffer_start,
+                       buffer,
+                       wide_samples,
+                       channels,
+                       bits_per_sample,
+                       file_info->sample_format_bytes_per_sample * 8
+               );
+       }
 
-       reservoir_samples_ = wide_samples;
+       sample_buffer_last_ += wide_samples;
 
-       return FLAC__STREAM_DECODER_WRITE_CONTINUE;
+       return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
 }
 
-void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
+void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
 {
        file_info_struct *file_info = (file_info_struct *)client_data;
        (void)decoder;
-       if(metadata->type == FLAC__METADATA_TYPE_ENCODING) {
-               assert(metadata->data.encoding.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
-               file_info->total_samples = (unsigned)(metadata->data.encoding.total_samples&0xffffffff);
-               file_info->bits_per_sample = metadata->data.encoding.bits_per_sample;
-               file_info->channels = metadata->data.encoding.channels;
-               file_info->sample_rate = metadata->data.encoding.sample_rate;
-
-               if(file_info->bits_per_sample != 16) {
-                       file_info->abort_flag = true;
-                       return;
+       if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
+               FLAC__ASSERT(metadata->data.stream_info.total_samples < FLAC__U64L(0x100000000)); /* this plugin can only handle < 4 gigasamples */
+               file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff);
+               file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
+               file_info->channels = metadata->data.stream_info.channels;
+               file_info->sample_rate = metadata->data.stream_info.sample_rate;
+               file_info->length_in_msec = (FLAC__uint64)file_info->total_samples * 10 / (file_info->sample_rate / 100);
+       }
+       else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
+               double gain, peak;
+               if(grabbag__replaygain_load_from_vorbiscomment(metadata, flac_cfg.output.replaygain.album_mode, &gain, &peak)) {
+                       file_info->has_replaygain = true;
+                       file_info->replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)flac_cfg.output.replaygain.preamp, /*prevent_clipping=*/!flac_cfg.output.replaygain.hard_limit);
                }
-               file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
        }
 }
 
@@ -391,6 +576,6 @@ void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorS
 {
        file_info_struct *file_info = (file_info_struct *)client_data;
        (void)decoder;
-       if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC)
+       if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
                file_info->abort_flag = true;
 }