2009-08-26 20:08:13 +02:00
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/*
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2010-01-01 05:55:13 +01:00
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* Copyright (C) 2003-2010 The Music Player Daemon Project
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2009-08-26 20:08:13 +02:00
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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2009-10-11 23:32:22 +02:00
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#include "config.h" /* must be first for large file support */
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2009-08-26 20:08:13 +02:00
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#include "decoder_api.h"
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2009-11-10 19:01:38 +01:00
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#include "audio_check.h"
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2009-08-26 20:08:13 +02:00
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#include <glib.h>
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#include <mpg123.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "mpg123"
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static bool
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mpd_mpg123_init(G_GNUC_UNUSED const struct config_param *param)
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{
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mpg123_init();
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return true;
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}
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static void
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mpd_mpg123_finish(void)
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{
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mpg123_exit();
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}
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/**
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* Opens a file with an existing #mpg123_handle.
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*
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* @param handle a handle which was created before; on error, this
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* function will not free it
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* @param audio_format this parameter is filled after successful
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* return
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* @return true on success
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*/
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static bool
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mpd_mpg123_open(mpg123_handle *handle, const char *path_fs,
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struct audio_format *audio_format)
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{
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2009-11-10 19:01:38 +01:00
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GError *gerror = NULL;
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2009-08-26 20:08:13 +02:00
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char *path_dup;
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int error;
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int channels, encoding;
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long rate;
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/* mpg123_open() wants a writable string :-( */
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path_dup = g_strdup(path_fs);
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error = mpg123_open(handle, path_dup);
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g_free(path_dup);
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if (error != MPG123_OK) {
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g_warning("libmpg123 failed to open %s: %s",
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path_fs, mpg123_plain_strerror(error));
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return false;
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}
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/* obtain the audio format */
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error = mpg123_getformat(handle, &rate, &channels, &encoding);
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if (error != MPG123_OK) {
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g_warning("mpg123_getformat() failed: %s",
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mpg123_plain_strerror(error));
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return false;
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}
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if (encoding != MPG123_ENC_SIGNED_16) {
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/* other formats not yet implemented */
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g_warning("expected MPG123_ENC_SIGNED_16, got %d", encoding);
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return false;
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}
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2009-11-10 17:11:34 +01:00
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if (!audio_format_init_checked(audio_format, rate, SAMPLE_FORMAT_S16,
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2009-11-10 19:01:38 +01:00
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channels, &gerror)) {
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g_warning("%s", gerror->message);
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g_error_free(gerror);
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2009-08-26 20:08:13 +02:00
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return false;
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}
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return true;
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}
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static void
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mpd_mpg123_file_decode(struct decoder *decoder, const char *path_fs)
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{
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struct audio_format audio_format;
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mpg123_handle *handle;
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int error;
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2009-12-25 19:47:33 +01:00
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off_t num_samples;
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2009-08-26 20:08:13 +02:00
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enum decoder_command cmd;
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2011-01-21 14:25:46 +01:00
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struct mpg123_frameinfo info;
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2009-08-26 20:08:13 +02:00
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/* open the file */
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handle = mpg123_new(NULL, &error);
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if (handle == NULL) {
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g_warning("mpg123_new() failed: %s",
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mpg123_plain_strerror(error));
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return;
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}
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if (!mpd_mpg123_open(handle, path_fs, &audio_format)) {
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mpg123_delete(handle);
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return;
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}
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num_samples = mpg123_length(handle);
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/* tell MPD core we're ready */
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decoder_initialized(decoder, &audio_format, false,
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(float)num_samples /
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(float)audio_format.sample_rate);
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2011-01-21 14:25:46 +01:00
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if (mpg123_info(handle, &info) != MPG123_OK) {
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info.vbr = MPG123_CBR;
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info.bitrate = 0;
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}
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switch (info.vbr) {
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case MPG123_ABR:
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info.bitrate = info.abr_rate;
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break;
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case MPG123_CBR:
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break;
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default:
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info.bitrate = 0;
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}
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2009-08-26 20:08:13 +02:00
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/* the decoder main loop */
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do {
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unsigned char buffer[8192];
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size_t nbytes;
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/* decode */
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error = mpg123_read(handle, buffer, sizeof(buffer), &nbytes);
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if (error != MPG123_OK) {
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if (error != MPG123_DONE)
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g_warning("mpg123_read() failed: %s",
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mpg123_plain_strerror(error));
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break;
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}
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2011-01-21 14:25:46 +01:00
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/* update bitrate for ABR/VBR */
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if (info.vbr != MPG123_CBR) {
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/* FIXME: maybe skip, as too expensive? */
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/* FIXME: maybe, (info.vbr == MPG123_VBR) ? */
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if (mpg123_info (handle, &info) != MPG123_OK)
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info.bitrate = 0;
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}
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2009-08-26 20:08:13 +02:00
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/* send to MPD */
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2011-01-21 14:25:46 +01:00
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cmd = decoder_data(decoder, NULL, buffer, nbytes, info.bitrate);
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2009-08-26 20:08:13 +02:00
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/* seeking not yet implemented */
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} while (cmd == DECODE_COMMAND_NONE);
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/* cleanup */
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mpg123_delete(handle);
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}
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static struct tag *
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mpd_mpg123_tag_dup(const char *path_fs)
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{
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struct audio_format audio_format;
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mpg123_handle *handle;
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int error;
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off_t num_samples;
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struct tag *tag;
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handle = mpg123_new(NULL, &error);
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if (handle == NULL) {
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g_warning("mpg123_new() failed: %s",
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mpg123_plain_strerror(error));
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return NULL;
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}
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if (!mpd_mpg123_open(handle, path_fs, &audio_format)) {
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mpg123_delete(handle);
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return NULL;
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}
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num_samples = mpg123_length(handle);
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if (num_samples <= 0) {
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mpg123_delete(handle);
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return NULL;
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}
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tag = tag_new();
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tag->time = num_samples / audio_format.sample_rate;
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/* ID3 tag support not yet implemented */
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mpg123_delete(handle);
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return tag;
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}
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static const char *const mpg123_suffixes[] = {
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"mp3",
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NULL
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};
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const struct decoder_plugin mpg123_decoder_plugin = {
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.name = "mpg123",
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.init = mpd_mpg123_init,
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.finish = mpd_mpg123_finish,
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.file_decode = mpd_mpg123_file_decode,
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/* streaming not yet implemented */
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.tag_dup = mpd_mpg123_tag_dup,
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.suffixes = mpg123_suffixes,
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};
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