diff options
Diffstat (limited to 'src/output/shout_mp3.c')
| -rw-r--r-- | src/output/shout_mp3.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/output/shout_mp3.c b/src/output/shout_mp3.c new file mode 100644 index 000000000..e57b0c385 --- /dev/null +++ b/src/output/shout_mp3.c @@ -0,0 +1,188 @@ +/* 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" + +#ifdef HAVE_SHOUT_MP3 + +#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, +}; + +#endif |