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/* 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 <lame/lame.h>
#include <assert.h>
#include <stdlib.h>
struct lame_data {
lame_global_flags *gfp;
};
static int shout_mp3_encoder_init(struct shout_data *sd)
{
struct lame_data *ld = g_new(struct lame_data, 1);
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)
g_warning("error flushing lame buffers\n");
lame_close(ld->gfp);
ld->gfp = NULL;
return (ret > 0);
}
static void shout_mp3_encoder_finish(struct shout_data *sd)
{
struct lame_data *ld = (struct lame_data *)sd->encoder_data;
assert(ld->gfp == NULL);
g_free(ld);
}
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())) {
g_warning("error initializing lame encoder for shout\n");
return -1;
}
if (sd->quality >= -1.0) {
if (0 != lame_set_VBR(ld->gfp, vbr_rh)) {
g_warning("error setting lame VBR mode\n");
return -1;
}
if (0 != lame_set_VBR_q(ld->gfp, sd->quality)) {
g_warning("error setting lame VBR quality\n");
return -1;
}
} else {
if (0 != lame_set_brate(ld->gfp, sd->bitrate)) {
g_warning("error setting lame bitrate\n");
return -1;
}
}
if (0 != lame_set_num_channels(ld->gfp,
sd->audio_format.channels)) {
g_warning("error setting lame num channels\n");
return -1;
}
if (0 != lame_set_in_samplerate(ld->gfp,
sd->audio_format.sample_rate)) {
g_warning("error setting lame sample rate\n");
return -1;
}
if (0 > lame_init_params(ld->gfp))
g_error("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;
const 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)
{
const int16_t *src = (const int16_t*)chunk;
unsigned int i;
float *left, *right;
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);
left = g_malloc(sizeof(left[0]) * samples);
if (sd->audio_format.channels > 1)
right = g_malloc(sizeof(left[0]) * samples);
else
right = left;
/* this is for only 16-bit audio */
for (i = 0; i < samples; i++) {
left[i] = src[0];
if (right != left)
right[i] = src[1];
src += sd->audio_format.channels;
}
bytes_out = lame_encode_buffer_float(ld->gfp, left, right,
samples, buf->data,
sizeof(buf->data) - buf->len);
g_free(left);
if (right != left)
g_free(right);
if (0 > bytes_out) {
g_warning("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,
};
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