mirror of
https://github.com/claunia/flac.git
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Initial revision
This commit is contained in:
Josh Coalson
393
src/plugin_xmms/plugin.c
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393
src/plugin_xmms/plugin.c
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/* libxmms-flac - XMMS FLAC input plugin
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* Copyright (C) 2000 Josh Coalson
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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#include <glib.h>
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#include "xmms/plugin.h"
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#include "xmms/util.h"
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#include "FLAC/all.h"
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typedef struct {
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byte raw[128];
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char title[31];
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char artist[31];
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char album[31];
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char comment[31];
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unsigned year;
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unsigned track; /* may be 0 if v1 (not v1.1) tag */
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unsigned genre;
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char description[1024]; /* the formatted description passed to xmms */
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} id3v1_struct;
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typedef struct {
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bool abort_flag;
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bool is_playing;
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bool eof;
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unsigned total_samples;
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unsigned bits_per_sample;
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unsigned channels;
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unsigned sample_rate;
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unsigned length_in_msec;
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int seek_to_in_sec;
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} file_info_struct;
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static void FLAC_XMMS__init();
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static int FLAC_XMMS__is_our_file(char *filename);
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static void FLAC_XMMS__play_file(char *filename);
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static void FLAC_XMMS__stop();
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static void FLAC_XMMS__pause(short p);
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static void FLAC_XMMS__seek(int time);
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static int FLAC_XMMS__get_time();
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static void FLAC_XMMS__cleanup();
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static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length);
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static void *play_loop_(void *arg);
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static bool decoder_init_(const char *filename);
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static bool get_id3v1_tag_(const char *filename, id3v1_struct *tag);
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static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data);
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static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
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static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
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InputPlugin flac_ip =
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{
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NULL,
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NULL,
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"FLAC Player v" FLAC__VERSION_STRING,
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FLAC_XMMS__init,
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NULL,
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NULL,
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FLAC_XMMS__is_our_file,
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NULL,
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FLAC_XMMS__play_file,
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FLAC_XMMS__stop,
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FLAC_XMMS__pause,
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FLAC_XMMS__seek,
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NULL,
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FLAC_XMMS__get_time,
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NULL,
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NULL,
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FLAC_XMMS__cleanup,
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NULL,
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NULL,
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NULL,
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NULL,
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FLAC_XMMS__get_song_info,
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NULL, /* file_info_box */
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NULL
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};
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static int16 reservoir_[FLAC__MAX_BLOCK_SIZE * 2]; /* 2 for max channels */
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static unsigned reservoir_samples_;
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static FLAC__FileDecoder *decoder_;
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static file_info_struct file_info_;
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static pthread_t decode_thread_;
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static bool audio_error_ = false;
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InputPlugin *get_iplugin_info()
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{
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flac_ip.description = g_strdup_printf("FLAC Player v%u.%u", FLAC__MAJOR_VERSION, FLAC__MINOR_VERSION);
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return &flac_ip;
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}
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void FLAC_XMMS__init()
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{
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decoder_ = FLAC__file_decoder_get_new_instance();
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}
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int FLAC_XMMS__is_our_file(char *filename)
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{
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char *ext;
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ext = strrchr(filename, '.');
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if (ext)
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if (!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
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return 1;
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return 0;
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}
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void FLAC_XMMS__play_file(char *filename)
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{
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FILE *f;
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id3v1_struct tag;
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if(0 == (f = fopen(filename, "r")))
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return;
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fclose(f);
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if(!decoder_init_(filename))
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return;
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reservoir_samples_ = 0;
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audio_error_ = false;
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file_info_.is_playing = true;
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file_info_.eof = false;
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if (flac_ip.output->open_audio(FMT_S16_NE, file_info_.sample_rate, file_info_.channels) == 0) {
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audio_error_ = true;
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if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(decoder_);
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return;
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}
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(void)get_id3v1_tag_(filename, &tag);
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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);
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file_info_.seek_to_in_sec = -1;
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pthread_create(&decode_thread_, NULL, play_loop_, NULL);
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}
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void FLAC_XMMS__stop()
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{
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if(file_info_.is_playing) {
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file_info_.is_playing = false;
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pthread_join(decode_thread_, NULL);
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flac_ip.output->close_audio();
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if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(decoder_);
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}
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}
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void FLAC_XMMS__pause(short p)
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{
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flac_ip.output->pause(p);
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}
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void FLAC_XMMS__seek(int time)
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{
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file_info_.seek_to_in_sec = time;
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file_info_.eof = false;
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while(file_info_.seek_to_in_sec != -1)
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xmms_usleep(10000);
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}
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int FLAC_XMMS__get_time()
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{
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if(audio_error_)
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return -2;
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if(!file_info_.is_playing || (file_info_.eof && !flac_ip.output->buffer_playing()))
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return -1;
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else
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return flac_ip.output->output_time();
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}
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void FLAC_XMMS__cleanup()
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{
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if(decoder_)
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FLAC__file_decoder_free_instance(decoder_);
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}
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void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
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{
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id3v1_struct tag;
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if(title) {
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(void)get_id3v1_tag_(filename, &tag);
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*title = g_malloc(strlen(tag.description)+1);
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strcpy(*title, tag.description);
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}
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if(length_in_msec) {
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FLAC__FileDecoder *tmp_decoder = FLAC__file_decoder_get_new_instance();
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file_info_struct tmp_file_info;
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if(0 == tmp_decoder) {
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*length_in_msec = -1;
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return;
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}
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tmp_file_info.abort_flag = false;
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if(FLAC__file_decoder_init(tmp_decoder, filename, write_callback_, metadata_callback_, error_callback_, &tmp_file_info) != FLAC__FILE_DECODER_OK) {
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*length_in_msec = -1;
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return;
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}
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if(!FLAC__file_decoder_process_metadata(tmp_decoder)) {
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*length_in_msec = -1;
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return;
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}
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*length_in_msec = (int)tmp_file_info.length_in_msec;
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if(tmp_decoder->state != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(tmp_decoder);
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FLAC__file_decoder_free_instance(tmp_decoder);
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}
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}
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/***********************************************************************
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* local routines
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**********************************************************************/
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void *play_loop_(void *arg)
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{
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(void)arg;
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while(file_info_.is_playing) {
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if(!file_info_.eof) {
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(void)FLAC__file_decoder_process_one_frame(decoder_);
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if(reservoir_samples_ > 0) {
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unsigned bytes = reservoir_samples_ * ((file_info_.bits_per_sample+7)/8) * file_info_.channels;
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flac_ip.add_vis_pcm(flac_ip.output->written_time(), FMT_S16_NE, file_info_.channels, bytes, (char*)reservoir_);
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while(flac_ip.output->buffer_free() < (int)bytes && file_info_.is_playing && file_info_.seek_to_in_sec == -1)
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xmms_usleep(10000);
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if(file_info_.is_playing && file_info_.seek_to_in_sec == -1)
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flac_ip.output->write_audio((char*)reservoir_, bytes);
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reservoir_samples_ = 0;
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}
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else {
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file_info_.eof = true;
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xmms_usleep(10000);
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}
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}
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else
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xmms_usleep(10000);
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if (file_info_.seek_to_in_sec != -1) {
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const double distance = (double)file_info_.seek_to_in_sec * 1000.0 / (double)file_info_.length_in_msec;
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unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
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if(FLAC__file_decoder_seek_absolute(decoder_, (uint64)target_sample)) {
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flac_ip.output->flush(file_info_.seek_to_in_sec * 1000);
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file_info_.seek_to_in_sec = -1;
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file_info_.eof = false;
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}
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}
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}
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if(decoder_ && decoder_->state != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(decoder_);
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/* are these two calls necessary? */
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flac_ip.output->buffer_free();
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flac_ip.output->buffer_free();
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pthread_exit(NULL);
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return 0; /* to silence the compiler warning about not returning a value */
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}
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bool decoder_init_(const char *filename)
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{
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if(decoder_ == 0)
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return false;
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if(FLAC__file_decoder_init(decoder_, filename, write_callback_, metadata_callback_, error_callback_, &file_info_) != FLAC__FILE_DECODER_OK)
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return false;
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file_info_.abort_flag = false;
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if(!FLAC__file_decoder_process_metadata(decoder_))
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return false;
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return true;
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}
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bool get_id3v1_tag_(const char *filename, id3v1_struct *tag)
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{
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const char *temp;
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FILE *f = fopen(filename, "rb");
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memset(tag, 0, sizeof(id3v1_struct));
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/* set the description to the filename by default */
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temp = strrchr(filename, '/');
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if(!temp)
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temp = filename;
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else
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temp++;
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strcpy(tag->description, temp);
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*strrchr(tag->description, '.') = '\0';
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if(0 == f)
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return false;
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if(-1 == fseek(f, -128, SEEK_END)) {
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fclose(f);
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return false;
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}
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if(fread(tag->raw, 1, 128, f) < 128) {
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fclose(f);
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return false;
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}
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fclose(f);
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if(strncmp(tag->raw, "TAG", 3))
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return false;
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else {
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char year_str[5];
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memcpy(tag->title, tag->raw+3, 30);
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memcpy(tag->artist, tag->raw+33, 30);
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memcpy(tag->album, tag->raw+63, 30);
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memcpy(year_str, tag->raw+93, 4); year_str[4] = '\0'; tag->year = atoi(year_str);
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memcpy(tag->comment, tag->raw+97, 30);
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tag->genre = (unsigned)((byte)tag->raw[127]);
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tag->track = (unsigned)((byte)tag->raw[126]);
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sprintf(tag->description, "%s - %s", tag->artist, tag->title);
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return true;
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}
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}
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FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data)
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{
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file_info_struct *file_info = (file_info_struct *)client_data;
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unsigned bps = file_info->bits_per_sample, channels = file_info->channels;
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unsigned wide_samples = header->blocksize, wide_sample, sample, channel;
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(void)decoder;
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if(file_info->abort_flag)
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return FLAC__STREAM_DECODER_WRITE_ABORT;
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assert(bps == 16);
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for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
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for(channel = 0; channel < channels; channel++, sample++)
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reservoir_[sample] = (int16)buffer[channel][wide_sample];
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reservoir_samples_ = wide_samples;
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return FLAC__STREAM_DECODER_WRITE_CONTINUE;
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}
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void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
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{
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file_info_struct *file_info = (file_info_struct *)client_data;
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(void)decoder;
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if(metadata->type == FLAC__METADATA_TYPE_ENCODING) {
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assert(metadata->data.encoding.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
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file_info->total_samples = (unsigned)(metadata->data.encoding.total_samples&0xffffffff);
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file_info->bits_per_sample = metadata->data.encoding.bits_per_sample;
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file_info->channels = metadata->data.encoding.channels;
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file_info->sample_rate = metadata->data.encoding.sample_rate;
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if(file_info->bits_per_sample != 16) {
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file_info->abort_flag = true;
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return;
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}
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file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
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}
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}
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void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
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{
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file_info_struct *file_info = (file_info_struct *)client_data;
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(void)decoder;
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if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC)
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file_info->abort_flag = true;
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}
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