| /* libxmms-flac - XMMS FLAC input plugin |
| * Copyright (C) 2000,2001,2002 Josh Coalson |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| #include <pthread.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <glib.h> |
| |
| #include "xmms/plugin.h" |
| #include "xmms/util.h" |
| #include "FLAC/all.h" |
| |
| #ifdef min |
| #undef min |
| #endif |
| #define min(x,y) ((x)<(y)?(x):(y)) |
| |
| typedef struct { |
| FLAC__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 { |
| 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; |
| AFormat sample_format; |
| int seek_to_in_sec; |
| } file_info_struct; |
| |
| static void FLAC_XMMS__init(); |
| static int FLAC_XMMS__is_our_file(char *filename); |
| static void FLAC_XMMS__play_file(char *filename); |
| static void FLAC_XMMS__stop(); |
| static void FLAC_XMMS__pause(short p); |
| static void FLAC_XMMS__seek(int time); |
| static int FLAC_XMMS__get_time(); |
| static void FLAC_XMMS__cleanup(); |
| static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length); |
| |
| static FLAC__bool get_id3v1_tag_(const char *filename, id3v1_struct *tag); |
| static void *play_loop_(void *arg); |
| 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, |
| FLAC_XMMS__init, |
| NULL, |
| NULL, |
| FLAC_XMMS__is_our_file, |
| NULL, |
| FLAC_XMMS__play_file, |
| FLAC_XMMS__stop, |
| FLAC_XMMS__pause, |
| FLAC_XMMS__seek, |
| NULL, |
| FLAC_XMMS__get_time, |
| NULL, |
| NULL, |
| FLAC_XMMS__cleanup, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| FLAC_XMMS__get_song_info, |
| NULL, /* file_info_box */ |
| NULL |
| }; |
| |
| #define SAMPLES_PER_WRITE 512 |
| static FLAC__byte reservoir_[FLAC__MAX_BLOCK_SIZE * 2 * 2 * 2]; /* *2 for max bytes-per-sample, *2 for max channels, another *2 for overflow */ |
| static FLAC__byte output_[FLAC__MAX_BLOCK_SIZE * 2 * 2]; /* *2 for max bytes-per-sample, *2 for max channels */ |
| static unsigned reservoir_samples_ = 0; |
| static FLAC__FileDecoder *decoder_ = 0; |
| static file_info_struct file_info_; |
| static pthread_t decode_thread_; |
| static FLAC__bool audio_error_ = false; |
| |
| InputPlugin *get_iplugin_info() |
| { |
| flac_ip.description = g_strdup_printf("FLAC Player v%s", FLAC__VERSION_STRING); |
| return &flac_ip; |
| } |
| |
| void FLAC_XMMS__init() |
| { |
| decoder_ = FLAC__file_decoder_new(); |
| } |
| |
| int FLAC_XMMS__is_our_file(char *filename) |
| { |
| char *ext; |
| |
| ext = strrchr(filename, '.'); |
| if(ext) |
| if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla")) |
| return 1; |
| return 0; |
| } |
| |
| void FLAC_XMMS__play_file(char *filename) |
| { |
| FILE *f; |
| id3v1_struct tag; |
| |
| reservoir_samples_ = 0; |
| audio_error_ = false; |
| file_info_.abort_flag = false; |
| file_info_.is_playing = false; |
| file_info_.eof = false; |
| file_info_.play_thread_open = false; |
| |
| if(0 == (f = fopen(filename, "r"))) |
| return; |
| fclose(f); |
| |
| if(decoder_ == 0) |
| return; |
| |
| if(!safe_decoder_init_(filename, decoder_)) |
| return; |
| |
| file_info_.is_playing = true; |
| |
| if(flac_ip.output->open_audio(file_info_.sample_format, file_info_.sample_rate, file_info_.channels) == 0) { |
| audio_error_ = true; |
| 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_.seek_to_in_sec = -1; |
| file_info_.play_thread_open = true; |
| pthread_create(&decode_thread_, NULL, play_loop_, NULL); |
| } |
| |
| void FLAC_XMMS__stop() |
| { |
| if(file_info_.is_playing) { |
| file_info_.is_playing = false; |
| if(file_info_.play_thread_open) { |
| file_info_.play_thread_open = false; |
| pthread_join(decode_thread_, NULL); |
| } |
| flac_ip.output->close_audio(); |
| safe_decoder_finish_(decoder_); |
| } |
| } |
| |
| void FLAC_XMMS__pause(short p) |
| { |
| flac_ip.output->pause(p); |
| } |
| |
| void FLAC_XMMS__seek(int time) |
| { |
| file_info_.seek_to_in_sec = time; |
| file_info_.eof = false; |
| |
| while(file_info_.seek_to_in_sec != -1) |
| xmms_usleep(10000); |
| } |
| |
| int FLAC_XMMS__get_time() |
| { |
| if(audio_error_) |
| return -2; |
| if(!file_info_.is_playing || (file_info_.eof && !flac_ip.output->buffer_playing())) |
| return -1; |
| else |
| return flac_ip.output->output_time(); |
| } |
| |
| void FLAC_XMMS__cleanup() |
| { |
| 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(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(length_in_msec) |
| *length_in_msec = -1; |
| return; |
| } |
| |
| if(title) { |
| (void)get_id3v1_tag_(filename, &tag); |
| *title = g_malloc(strlen(tag.description)+1); |
| strcpy(*title, tag.description); |
| } |
| if(length_in_msec) |
| *length_in_msec = streaminfo.data.stream_info.total_samples * 10 / (streaminfo.data.stream_info.sample_rate / 100); |
| } |
| |
| /*********************************************************************** |
| * local routines |
| **********************************************************************/ |
| |
| FLAC__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)((FLAC__byte)tag->raw[127]); |
| tag->track = (unsigned)((FLAC__byte)tag->raw[126]); |
| |
| sprintf(tag->description, "%s - %s", tag->artist, tag->title); |
| |
| return true; |
| } |
| } |
| |
| void *play_loop_(void *arg) |
| { |
| (void)arg; |
| |
| while(file_info_.is_playing) { |
| if(!file_info_.eof) { |
| while(reservoir_samples_ < SAMPLES_PER_WRITE) { |
| if(FLAC__file_decoder_get_state(decoder_) == 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) { |
| const unsigned channels = file_info_.channels; |
| const unsigned bytes_per_sample = (file_info_.bits_per_sample+7)/8; |
| unsigned i, n = min(reservoir_samples_, SAMPLES_PER_WRITE), delta; |
| unsigned bytes = n * bytes_per_sample * channels; |
| |
| for(i = 0; i < bytes; i++) |
| output_[i] = reservoir_[i]; |
| delta = i; |
| for( ; i < reservoir_samples_*bytes_per_sample*channels; i++) |
| reservoir_[i-delta] = reservoir_[i]; |
| reservoir_samples_ -= n; |
| |
| flac_ip.add_vis_pcm(flac_ip.output->written_time(), file_info_.sample_format, channels, bytes, output_); |
| 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(output_, bytes); |
| } |
| else { |
| file_info_.eof = true; |
| xmms_usleep(10000); |
| } |
| } |
| else |
| xmms_usleep(10000); |
| 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_, (FLAC__uint64)target_sample)) { |
| flac_ip.output->flush(file_info_.seek_to_in_sec * 1000); |
| file_info_.seek_to_in_sec = -1; |
| file_info_.eof = false; |
| reservoir_samples_ = 0; |
| } |
| } |
| } |
| |
| safe_decoder_finish_(decoder_); |
| |
| /* are these two calls necessary? */ |
| flac_ip.output->buffer_free(); |
| flac_ip.output->buffer_free(); |
| |
| pthread_exit(NULL); |
| return 0; /* to silence the compiler warning about not returning a value */ |
| } |
| |
| FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder) |
| { |
| if(decoder == 0) |
| return false; |
| |
| safe_decoder_finish_(decoder); |
| |
| FLAC__file_decoder_set_md5_checking(decoder, false); |
| FLAC__file_decoder_set_filename(decoder, filename); |
| 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; |
| |
| if(!FLAC__file_decoder_process_metadata(decoder)) |
| return false; |
| |
| return true; |
| } |
| |
| void safe_decoder_finish_(FLAC__FileDecoder *decoder) |
| { |
| if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED) |
| FLAC__file_decoder_finish(decoder); |
| } |
| |
| 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__Frame *frame, const FLAC__int32 * const 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; |
| FLAC__int8 *scbuffer = (FLAC__int8*)reservoir_; |
| FLAC__int16 *ssbuffer = (FLAC__int16*)reservoir_; |
| |
| (void)decoder; |
| |
| if(file_info->abort_flag) |
| return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; |
| |
| if(bps == 8) { |
| for(sample = reservoir_samples_*channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++) |
| for(channel = 0; channel < channels; channel++, sample++) |
| scbuffer[sample] = (FLAC__int8)buffer[channel][wide_sample]; |
| } |
| else if(bps == 16) { |
| for(sample = reservoir_samples_*channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++) |
| for(channel = 0; channel < channels; channel++, sample++) |
| ssbuffer[sample] = (FLAC__int16)buffer[channel][wide_sample]; |
| } |
| else { |
| file_info->abort_flag = true; |
| return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; |
| } |
| |
| reservoir_samples_ += wide_samples; |
| |
| return FLAC__STREAM_DECODER_WRITE_STATUS_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_STREAMINFO) { |
| FLAC__ASSERT(metadata->data.stream_info.total_samples < 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; |
| |
| if(file_info->bits_per_sample == 8) { |
| file_info->sample_format = FMT_S8; |
| } |
| else if(file_info->bits_per_sample == 16) { |
| file_info->sample_format = FMT_S16_NE; |
| } |
| else { |
| 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_STATUS_LOST_SYNC) |
| file_info->abort_flag = true; |
| } |