/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "shout_plugin.h" #include "../utils.h" #include <lame/lame.h> struct lame_data { lame_global_flags *gfp; }; static int shout_mp3_encoder_init(struct shout_data *sd) { struct lame_data *ld; if (NULL == (ld = xmalloc(sizeof(*ld)))) FATAL("error initializing lame encoder data\n"); sd->encoder_data = ld; return 0; } static int shout_mp3_encoder_clear_encoder(struct shout_data *sd) { struct lame_data *ld = (struct lame_data *)sd->encoder_data; struct shout_buffer *buf = &sd->buf; int ret; if ((ret = lame_encode_flush(ld->gfp, buf->data + buf->len, buf->len)) < 0) ERROR("error flushing lame buffers\n"); return (ret > 0); } static void shout_mp3_encoder_finish(struct shout_data *sd) { struct lame_data *ld = (struct lame_data *)sd->encoder_data; lame_close(ld->gfp); ld->gfp = NULL; } static int shout_mp3_encoder_init_encoder(struct shout_data *sd) { struct lame_data *ld = (struct lame_data *)sd->encoder_data; if (NULL == (ld->gfp = lame_init())) { ERROR("error initializing lame encoder for shout\n"); return -1; } if (sd->quality >= -1.0) { if (0 != lame_set_VBR(ld->gfp, vbr_rh)) { ERROR("error setting lame VBR mode\n"); return -1; } if (0 != lame_set_VBR_q(ld->gfp, sd->quality)) { ERROR("error setting lame VBR quality\n"); return -1; } } else { if (0 != lame_set_brate(ld->gfp, sd->bitrate)) { ERROR("error setting lame bitrate\n"); return -1; } } if (0 != lame_set_num_channels(ld->gfp, sd->audio_format.channels)) { ERROR("error setting lame num channels\n"); return -1; } if (0 != lame_set_in_samplerate(ld->gfp, sd->audio_format.sample_rate)) { ERROR("error setting lame sample rate\n"); return -1; } if (0 > lame_init_params(ld->gfp)) FATAL("error initializing lame params\n"); return 0; } static int shout_mp3_encoder_send_metadata(struct shout_data *sd, char * song, size_t size) { char artist[size]; char title[size]; int i; struct tag *tag = sd->tag; strncpy(artist, "", size); strncpy(title, "", size); for (i = 0; i < tag->numOfItems; i++) { switch (tag->items[i]->type) { case TAG_ITEM_ARTIST: strncpy(artist, tag->items[i]->value, size); break; case TAG_ITEM_TITLE: strncpy(title, tag->items[i]->value, size); break; default: break; } } snprintf(song, size, "%s - %s", title, artist); return 1; } static int shout_mp3_encoder_encode(struct shout_data *sd, const char * chunk, size_t len) { unsigned int i; int j; float (*lamebuf)[2]; struct shout_buffer *buf = &(sd->buf); unsigned int samples; int bytes = audio_format_sample_size(&sd->audio_format); struct lame_data *ld = (struct lame_data *)sd->encoder_data; int bytes_out; samples = len / (bytes * sd->audio_format.channels); /* rough estimate, from lame.h */ lamebuf = xmalloc(sizeof(float) * (1.25 * samples + 7200)); /* this is for only 16-bit audio */ for (i = 0; i < samples; i++) { for (j = 0; j < sd->audio_format.channels; j++) { lamebuf[j][i] = *((const int16_t *) chunk); chunk += bytes; } } bytes_out = lame_encode_buffer_float(ld->gfp, lamebuf[0], lamebuf[1], samples, buf->data, sizeof(buf->data) - buf->len); free(lamebuf); if (0 > bytes_out) { ERROR("error encoding lame buffer for shout\n"); lame_close(ld->gfp); ld->gfp = NULL; return -1; } else buf->len = bytes_out; /* signed to unsigned conversion */ return 0; } const struct shout_encoder_plugin shout_mp3_encoder = { "mp3", SHOUT_FORMAT_MP3, shout_mp3_encoder_clear_encoder, shout_mp3_encoder_encode, shout_mp3_encoder_finish, shout_mp3_encoder_init, shout_mp3_encoder_init_encoder, shout_mp3_encoder_send_metadata, };