/* * Copyright (C) 2003-2009 The Music Player Daemon Project * http://www.musicpd.org * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" /* must be first for large file support */ #include "decoder_api.h" #include <glib.h> #include <mpg123.h> #undef G_LOG_DOMAIN #define G_LOG_DOMAIN "mpg123" static bool mpd_mpg123_init(G_GNUC_UNUSED const struct config_param *param) { mpg123_init(); return true; } static void mpd_mpg123_finish(void) { mpg123_exit(); } /** * Opens a file with an existing #mpg123_handle. * * @param handle a handle which was created before; on error, this * function will not free it * @param audio_format this parameter is filled after successful * return * @return true on success */ static bool mpd_mpg123_open(mpg123_handle *handle, const char *path_fs, struct audio_format *audio_format) { char *path_dup; int error; int channels, encoding; long rate; /* mpg123_open() wants a writable string :-( */ path_dup = g_strdup(path_fs); error = mpg123_open(handle, path_dup); g_free(path_dup); if (error != MPG123_OK) { g_warning("libmpg123 failed to open %s: %s", path_fs, mpg123_plain_strerror(error)); return false; } /* obtain the audio format */ error = mpg123_getformat(handle, &rate, &channels, &encoding); if (error != MPG123_OK) { g_warning("mpg123_getformat() failed: %s", mpg123_plain_strerror(error)); return false; } if (encoding != MPG123_ENC_SIGNED_16) { /* other formats not yet implemented */ g_warning("expected MPG123_ENC_SIGNED_16, got %d", encoding); return false; } audio_format_init(audio_format, rate, 16, channels); if (!audio_format_valid(audio_format)) { g_warning("invalid audio format"); return false; } return true; } static void mpd_mpg123_file_decode(struct decoder *decoder, const char *path_fs) { struct audio_format audio_format; mpg123_handle *handle; int error; off_t num_samples, position; enum decoder_command cmd; /* open the file */ handle = mpg123_new(NULL, &error); if (handle == NULL) { g_warning("mpg123_new() failed: %s", mpg123_plain_strerror(error)); return; } if (!mpd_mpg123_open(handle, path_fs, &audio_format)) { mpg123_delete(handle); return; } num_samples = mpg123_length(handle); /* tell MPD core we're ready */ decoder_initialized(decoder, &audio_format, false, (float)num_samples / (float)audio_format.sample_rate); /* the decoder main loop */ do { unsigned char buffer[8192]; size_t nbytes; position = mpg123_tell(handle); /* decode */ error = mpg123_read(handle, buffer, sizeof(buffer), &nbytes); if (error != MPG123_OK) { if (error != MPG123_DONE) g_warning("mpg123_read() failed: %s", mpg123_plain_strerror(error)); break; } /* send to MPD */ cmd = decoder_data(decoder, NULL, buffer, nbytes, (float)position / (float)audio_format.sample_rate, 0, NULL); /* seeking not yet implemented */ } while (cmd == DECODE_COMMAND_NONE); /* cleanup */ mpg123_delete(handle); } static struct tag * mpd_mpg123_tag_dup(const char *path_fs) { struct audio_format audio_format; mpg123_handle *handle; int error; off_t num_samples; struct tag *tag; handle = mpg123_new(NULL, &error); if (handle == NULL) { g_warning("mpg123_new() failed: %s", mpg123_plain_strerror(error)); return NULL; } if (!mpd_mpg123_open(handle, path_fs, &audio_format)) { mpg123_delete(handle); return NULL; } num_samples = mpg123_length(handle); if (num_samples <= 0) { mpg123_delete(handle); return NULL; } tag = tag_new(); tag->time = num_samples / audio_format.sample_rate; /* ID3 tag support not yet implemented */ mpg123_delete(handle); return tag; } static const char *const mpg123_suffixes[] = { "mp3", NULL }; const struct decoder_plugin mpg123_decoder_plugin = { .name = "mpg123", .init = mpd_mpg123_init, .finish = mpd_mpg123_finish, .file_decode = mpd_mpg123_file_decode, /* streaming not yet implemented */ .tag_dup = mpd_mpg123_tag_dup, .suffixes = mpg123_suffixes, };