Commit 6213a31f authored by Josh Coalson's avatar Josh Coalson
Browse files

rough implementation (haven't even compile it yet)

parent 456db820
/* in_flac - Winamp3 FLAC input plugin
* Copyright (C) 2001 Josh Coalson
*
* This program is free software; you can redistribute it and/or
......@@ -19,6 +18,36 @@
#include <windows.h>
#include <stdio.h>
#include "core_api.h"
#include "FLAC/all.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;
typedef struct {
bool abort_flag;
bool is_playing;
bool eof;
unsigned total_samples;
unsigned bits_per_sample;
unsigned channels;
unsigned sample_rate;
unsigned length_in_msec;
} file_info_struct;
static bool get_id3v1_tag_(const char *filename, id3v1_struct *tag);
static bool decoder_init_(const char *filename);
static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const int32 *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);
static char plugin_description_[] = "Reference FLAC Player v" FLAC__VERSION_STRING;
static HINSTANCE g_hDllInstance_;
......@@ -26,21 +55,20 @@ static HINSTANCE g_hDllInstance_;
class FLAC_Info : public WInputInfo
{
private:
char title[MAX_PATH], infostr[MAX_PATH];
int length_in_ms;
id3v1_struct tag_;
int length_in_msec_;
public:
FLAC_Info();
~FLAC_Info();
int Open(char *url);
void GetTitle(char *buf, int maxlen);
void GetInfoString(char *buf, int maxlen);
inline int GetLength(void) { return length_in_ms; }
inline int GetLength(void) { return length_in_msec_; }
};
FLAC_Info::FLAC_Info() : WInputInfo()
{
infostr[0] = title[0] = 0;
length_in_ms = -1;
length_in_msec_ = -1;
}
FLAC_Info::~FLAC_Info()
......@@ -49,39 +77,58 @@ FLAC_Info::~FLAC_Info()
int FLAC_Info::Open(char *url)
{
char *p=url+strlen(url);
while (*p != '\\' && p >= url) p--;
strcpy(title, ++p);
const char *filename = url; /* @@@ right now we only handle files */
HANDLE hFile;
length_in_ms = -1;
hFile = CreateFile(url, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile != INVALID_HANDLE_VALUE) {
length_in_ms = (GetFileSize(hFile, NULL)*10)/(SAMPLERATE/100*NCH*(BPS/8));
(void)get_id3v1_tag_(filename, &tag_);
file_info_struct tmp_file_info;
FLAC__FileDecoder *tmp_decoder = FLAC__file_decoder_get_new_instance();
if(0 == tmp_decoder) {
length_in_msec_ = -1;
return 1;
}
CloseHandle(hFile);
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 1;
}
if(!FLAC__file_decoder_process_metadata(tmp_decoder)) {
length_in_msec_ = -1;
return 1;
}
length_in_msec_ = (int)tmp_file_info.length_in_msec;
if(tmp_decoder->state != FLAC__FILE_DECODER_UNINITIALIZED)
FLAC__file_decoder_finish(tmp_decoder);
FLAC__file_decoder_free_instance(tmp_decoder);
return 0;
}
void FLAC_Info::GetTitle(char *buf, int maxlen)
{
strncpy(buf, title, maxlen-1);
buf[maxlen-1]=0;
buf[maxlen-1] = 0;
}
void FLAC_Info::GetInfoString(char *buf, int maxlen)
{
strncpy(buf, infostr, maxlen-1);
buf[maxlen-1]=0;
strncpy(buf, description, maxlen-1);
buf[maxlen-1] = 0;
}
class FLAC_Source : public WInputSource
{
private:
char title[MAX_PATH], infostr[MAX_PATH];
int length_in_ms;
HANDLE input_file;
id3v1_struct tag_;
FLAC__FileDecoder *decoder_;
int16 reservoir_[FLAC__MAX_BLOCK_SIZE * 2 * 2]; /* *2 for max channels, another *2 for overflow */
unsigned reservoir_samples_;
file_info_struct file_info_;
bool audio_error_;
public:
FLAC_Source();
~FLAC_Source();
......@@ -92,63 +139,131 @@ class FLAC_Source : public WInputSource
int SetPosition(int); // sets position in ms
void GetTitle(char *buf, int maxlen);
void GetInfoString(char *buf, int maxlen);
inline int GetLength(void) { return -1; }
inline int GetLength(void) { return (int)file_info_.length_in_msec; }
void cleanup();
};
void FLAC_Source::GetTitle(char *buf, int maxlen)
FLAC_Source::FLAC_Source() : WInputSource()
{
strncpy(buf, title, maxlen-1);
buf[maxlen-1] = 0;
decoder_ = FLAC__file_decoder_get_new_instance();
file_info_.length_in_msec = -1;
audio_error_ = false;
}
void FLAC_Source::GetInfoString(char *buf, int maxlen)
FLAC_Source::~FLAC_Source()
{
strncpy(buf, infostr, maxlen-1);
buf[maxlen-1] = 0;
if(decoder_)
FLAC__file_decoder_free_instance(decoder_);
}
FLAC_Source::FLAC_Source() : WInputSource()
void FLAC_Source::GetTitle(char *buf, int maxlen)
{
infostr[0] = title[0] = 0;
length_in_ms = -1;
input_file = NULL;
strncpy(buf, title, maxlen-1);
buf[maxlen-1] = 0;
}
FLAC_Source::~FLAC_Source()
void FLAC_Source::GetInfoString(char *buf, int maxlen)
{
if(input_file)
CloseHandle(input_file);
strncpy(buf, description, maxlen-1);
buf[maxlen-1] = 0;
}
int FLAC_Source::Open(char *url, bool *killswitch)
{
char *p = url+strlen(url);
while (*p != '\\' && p >= url) p--;
strcpy(title, ++p);
const char *filename = url; /* @@@ right now we only handle files */
{
FILE *f = fopen(filename, "r");
if(0 == f)
return 1;
fclose(f);
}
(void)get_id3v1_tag_(filename, &tag);
length_in_ms = -1;
input_file = CreateFile(url, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (input_file == INVALID_HANDLE_VALUE) return 1;
file_info_.length_in_msec = -1;
if(!decoder_init_(filename))
return 1;
if(file_info_.abort_flag) {
cleanup();
return 1;
}
reservoir_samples_ = 0;
audio_error_ = false;
file_info_.is_playing = true;
file_info_.eof = false;
length_in_ms = (GetFileSize(input_file, NULL)*10)/(SAMPLERATE/100*NCH*(BPS/8));
return 0;
}
int FLAC_Source::GetSamples(char *sample_buffer, int bytes, int *bps, int *nch, int *srate, bool *killswitch)
{
*srate = SAMPLERATE;
*bps = BPS;
*nch = NCH;
int return_bytes = 0;
*bps = (int)file_info_.bits_per_sample;
*nch = (int)file_info_.channels;
*srate = (int)file_info_.sample_rate;
if(!file_info_.eof) {
const unsigned channels = file_info_.channels;
const unsigned bytes_per_sample = (file_info_.bits_per_sample+7) / 8;
const unsigned wide_samples = bytes / channels / bytes_per_sample;
if(bytes&0x3)fprintf(stderr,"@@@ Got odd buffer size request\n");
while(reservoir_samples_ < wide_samples) {
if(decoder->state == FLAC__FILE_DECODER_END_OF_FILE) {
file_info_.eof = true;
break;
}
else if(!FLAC__file_decoder_process_one_frame(decoder_))
break;
}
if(reservoir_samples_ > 0) {
unsigned i, n = min(reservoir_samples_, wide_samples), delta;
int16 output = (int16*)sample_buffer;
unsigned long l;
ReadFile(input_file, sample_buffer, bytes, &l, NULL);
for(i = 0; i < n*channels; i++)
output[i] = reservoir_[i];
delta = i;
for( ; i < reservoir_samples_*channels; i++)
reservoir[i-delta] = reservoir[i];
reservoir_samples_ -= n;
return l;
return_bytes = (int)(n * bytes_per_sample * channels);
}
else {
file_info_.eof = true;
}
}
return return_bytes;
}
int FLAC_Source::SetPosition(int position)
{
return 1; // seeking not possible
const double distance = (double)position * 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)) {
file_info_.eof = false;
reservoir_samples_ = 0;
return 0;
}
else {
return 1;
}
}
void FLAC_Source::cleanup()
{
if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
FLAC__file_decoder_finish(decoder_);
reservoir_samples_ = 0;
audio_error_ = false;
file_info_.is_playing = false;
file_info_.eof = false;
file_info_.length_in_msec = -1;
}
......@@ -156,6 +271,118 @@ int FLAC_Source::SetPosition(int position)
* local routines
**********************************************************************/
bool get_id3v1_tag_(const char *filename, id3v1_struct *tag)
{
const char *temp;
FILE *f = fopen(filename, "rb");
memset(tag, 0, sizeof(id3v1_struct));
/* set the title and description to the filename by default */
temp = strrchr(filename, '/');
if(!temp)
temp = filename;
else
temp++;
strcpy(tag->description, temp);
*strrchr(tag->description, '.') = '\0';
strncpy(tag->title, tag->description, 30); tag->title[30] = '\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);
return true;
}
}
bool decoder_init_(const char *filename)
{
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)
return false;
file_info_.abort_flag = false;
if(!FLAC__file_decoder_process_metadata(decoder_))
return false;
return true;
}
FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
{
file_info_struct *file_info = (file_info_struct *)client_data;
const unsigned bps = file_info->bits_per_sample, channels = file_info->channels, wide_samples = frame->header.blocksize;
unsigned wide_sample, sample, channel;
(void)decoder;
if(file_info->abort_flag)
return FLAC__STREAM_DECODER_WRITE_ABORT;
assert(bps == 16);
for(sample = reservoir_samples_*channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
reservoir_[sample] = (int16)buffer[channel][wide_sample];
reservoir_samples_ += wide_samples;
return FLAC__STREAM_DECODER_WRITE_CONTINUE;
}
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;
}
file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
}
}
void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
{
file_info_struct *file_info = (file_info_struct *)client_data;
(void)decoder;
if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC)
file_info->abort_flag = true;
}
/***********************************************************************
......
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