renamed decoder plugin "mpc" to "mpcdec"
This plugin is based on "libmpcdec".
This commit is contained in:
Max Kellermann
273
src/decoder/mpcdec_plugin.c
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273
src/decoder/mpcdec_plugin.c
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/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "../decoder_api.h"
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#include "config.h"
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#include <mpcdec/mpcdec.h>
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#include <glib.h>
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#include <unistd.h>
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typedef struct _MpcCallbackData {
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struct input_stream *inStream;
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struct decoder *decoder;
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} MpcCallbackData;
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static mpc_int32_t mpc_read_cb(void *vdata, void *ptr, mpc_int32_t size)
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{
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MpcCallbackData *data = (MpcCallbackData *) vdata;
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return decoder_read(data->decoder, data->inStream, ptr, size);
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}
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static mpc_bool_t mpc_seek_cb(void *vdata, mpc_int32_t offset)
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{
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MpcCallbackData *data = (MpcCallbackData *) vdata;
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return input_stream_seek(data->inStream, offset, SEEK_SET);
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}
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static mpc_int32_t mpc_tell_cb(void *vdata)
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{
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MpcCallbackData *data = (MpcCallbackData *) vdata;
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return (long)(data->inStream->offset);
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}
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static mpc_bool_t mpc_canseek_cb(void *vdata)
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{
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MpcCallbackData *data = (MpcCallbackData *) vdata;
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return data->inStream->seekable;
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}
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static mpc_int32_t mpc_getsize_cb(void *vdata)
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{
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MpcCallbackData *data = (MpcCallbackData *) vdata;
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return data->inStream->size;
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}
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/* this _looks_ performance-critical, don't de-inline -- eric */
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static inline int32_t convertSample(MPC_SAMPLE_FORMAT sample)
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{
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/* only doing 16-bit audio for now */
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int32_t val;
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enum {
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bits = 24,
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};
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const int clip_min = -1 << (bits - 1);
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const int clip_max = (1 << (bits - 1)) - 1;
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#ifdef MPC_FIXED_POINT
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const int shift = bits - MPC_FIXED_POINT_SCALE_SHIFT;
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if (shift < 0)
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val = sample << -shift;
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else
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val = sample << shift;
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#else
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const int float_scale = 1 << (bits - 1);
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val = sample * float_scale;
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#endif
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if (val < clip_min)
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val = clip_min;
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else if (val > clip_max)
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val = clip_max;
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return val;
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}
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static void
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mpc_to_mpd_buffer(int32_t *dest, const MPC_SAMPLE_FORMAT *src,
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unsigned num_samples)
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{
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while (num_samples-- > 0)
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*dest++ = convertSample(*src++);
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}
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static void
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mpc_decode(struct decoder *mpd_decoder, struct input_stream *inStream)
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{
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mpc_decoder decoder;
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mpc_reader reader;
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mpc_streaminfo info;
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struct audio_format audio_format;
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MpcCallbackData data;
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MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH];
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mpc_uint32_t ret;
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int32_t chunk[G_N_ELEMENTS(sample_buffer)];
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long bitRate = 0;
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unsigned long samplePos = 0;
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mpc_uint32_t vbrUpdateAcc;
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mpc_uint32_t vbrUpdateBits;
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float total_time;
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struct replay_gain_info *replayGainInfo = NULL;
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enum decoder_command cmd = DECODE_COMMAND_NONE;
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data.inStream = inStream;
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data.decoder = mpd_decoder;
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reader.read = mpc_read_cb;
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reader.seek = mpc_seek_cb;
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reader.tell = mpc_tell_cb;
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reader.get_size = mpc_getsize_cb;
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reader.canseek = mpc_canseek_cb;
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reader.data = &data;
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mpc_streaminfo_init(&info);
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if ((ret = mpc_streaminfo_read(&info, &reader)) != ERROR_CODE_OK) {
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if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP)
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g_warning("Not a valid musepack stream\n");
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return;
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}
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mpc_decoder_setup(&decoder, &reader);
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if (!mpc_decoder_initialize(&decoder, &info)) {
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if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP)
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g_warning("Not a valid musepack stream\n");
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return;
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}
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audio_format.bits = 24;
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audio_format.channels = info.channels;
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audio_format.sample_rate = info.sample_freq;
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if (!audio_format_valid(&audio_format)) {
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g_warning("Invalid audio format: %u:%u:%u\n",
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audio_format.sample_rate,
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audio_format.bits,
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audio_format.channels);
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return;
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}
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replayGainInfo = replay_gain_info_new();
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replayGainInfo->tuples[REPLAY_GAIN_ALBUM].gain = info.gain_album * 0.01;
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replayGainInfo->tuples[REPLAY_GAIN_ALBUM].peak = info.peak_album / 32767.0;
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replayGainInfo->tuples[REPLAY_GAIN_TRACK].gain = info.gain_title * 0.01;
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replayGainInfo->tuples[REPLAY_GAIN_TRACK].peak = info.peak_title / 32767.0;
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decoder_initialized(mpd_decoder, &audio_format,
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inStream->seekable,
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mpc_streaminfo_get_length(&info));
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do {
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if (cmd == DECODE_COMMAND_SEEK) {
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samplePos = decoder_seek_where(mpd_decoder) *
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audio_format.sample_rate;
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if (mpc_decoder_seek_sample(&decoder, samplePos))
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decoder_command_finished(mpd_decoder);
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else
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decoder_seek_error(mpd_decoder);
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}
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vbrUpdateAcc = 0;
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vbrUpdateBits = 0;
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ret = mpc_decoder_decode(&decoder, sample_buffer,
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&vbrUpdateAcc, &vbrUpdateBits);
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if (ret == 0 || ret == (mpc_uint32_t)-1)
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break;
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samplePos += ret;
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ret *= info.channels;
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mpc_to_mpd_buffer(chunk, sample_buffer, ret);
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total_time = ((float)samplePos) / audio_format.sample_rate;
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bitRate = vbrUpdateBits * audio_format.sample_rate
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/ 1152 / 1000;
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cmd = decoder_data(mpd_decoder, inStream,
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chunk, ret * sizeof(chunk[0]),
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total_time,
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bitRate, replayGainInfo);
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} while (cmd != DECODE_COMMAND_STOP);
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replay_gain_info_free(replayGainInfo);
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}
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static float mpcGetTime(const char *file)
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{
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struct input_stream inStream;
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float total_time = -1;
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mpc_reader reader;
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mpc_streaminfo info;
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MpcCallbackData data;
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data.inStream = &inStream;
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data.decoder = NULL;
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reader.read = mpc_read_cb;
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reader.seek = mpc_seek_cb;
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reader.tell = mpc_tell_cb;
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reader.get_size = mpc_getsize_cb;
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reader.canseek = mpc_canseek_cb;
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reader.data = &data;
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mpc_streaminfo_init(&info);
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if (!input_stream_open(&inStream, file))
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return -1;
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if (mpc_streaminfo_read(&info, &reader) != ERROR_CODE_OK) {
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input_stream_close(&inStream);
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return -1;
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}
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total_time = mpc_streaminfo_get_length(&info);
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input_stream_close(&inStream);
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return total_time;
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}
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static struct tag *mpcTagDup(const char *file)
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{
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float total_time = mpcGetTime(file);
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struct tag *tag;
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if (total_time < 0) {
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g_debug("mpcTagDup: Failed to get Songlength of file: %s\n",
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file);
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return NULL;
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}
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tag = tag_new();
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tag->time = total_time;
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return tag;
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}
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static const char *const mpcSuffixes[] = { "mpc", NULL };
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const struct decoder_plugin mpcdec_decoder_plugin = {
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.name = "mpc",
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.stream_decode = mpc_decode,
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.tag_dup = mpcTagDup,
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.suffixes = mpcSuffixes,
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};
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