From c4d69f0ae1e0df6bac03fe131b4e8a40f75b5c4b Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Tue, 17 Feb 2009 08:48:20 +0100 Subject: renamed decoder plugin "mpc" to "mpcdec" This plugin is based on "libmpcdec". --- src/decoder/mpcdec_plugin.c | 273 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 273 insertions(+) create mode 100644 src/decoder/mpcdec_plugin.c (limited to 'src/decoder/mpcdec_plugin.c') diff --git a/src/decoder/mpcdec_plugin.c b/src/decoder/mpcdec_plugin.c new file mode 100644 index 000000000..c84dfca9b --- /dev/null +++ b/src/decoder/mpcdec_plugin.c @@ -0,0 +1,273 @@ +/* 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 "../decoder_api.h" +#include "config.h" + +#include +#include +#include + +typedef struct _MpcCallbackData { + struct input_stream *inStream; + struct decoder *decoder; +} MpcCallbackData; + +static mpc_int32_t mpc_read_cb(void *vdata, void *ptr, mpc_int32_t size) +{ + MpcCallbackData *data = (MpcCallbackData *) vdata; + + return decoder_read(data->decoder, data->inStream, ptr, size); +} + +static mpc_bool_t mpc_seek_cb(void *vdata, mpc_int32_t offset) +{ + MpcCallbackData *data = (MpcCallbackData *) vdata; + + return input_stream_seek(data->inStream, offset, SEEK_SET); +} + +static mpc_int32_t mpc_tell_cb(void *vdata) +{ + MpcCallbackData *data = (MpcCallbackData *) vdata; + + return (long)(data->inStream->offset); +} + +static mpc_bool_t mpc_canseek_cb(void *vdata) +{ + MpcCallbackData *data = (MpcCallbackData *) vdata; + + return data->inStream->seekable; +} + +static mpc_int32_t mpc_getsize_cb(void *vdata) +{ + MpcCallbackData *data = (MpcCallbackData *) vdata; + + return data->inStream->size; +} + +/* this _looks_ performance-critical, don't de-inline -- eric */ +static inline int32_t convertSample(MPC_SAMPLE_FORMAT sample) +{ + /* only doing 16-bit audio for now */ + int32_t val; + + enum { + bits = 24, + }; + + const int clip_min = -1 << (bits - 1); + const int clip_max = (1 << (bits - 1)) - 1; + +#ifdef MPC_FIXED_POINT + const int shift = bits - MPC_FIXED_POINT_SCALE_SHIFT; + + if (shift < 0) + val = sample << -shift; + else + val = sample << shift; +#else + const int float_scale = 1 << (bits - 1); + + val = sample * float_scale; +#endif + + if (val < clip_min) + val = clip_min; + else if (val > clip_max) + val = clip_max; + + return val; +} + +static void +mpc_to_mpd_buffer(int32_t *dest, const MPC_SAMPLE_FORMAT *src, + unsigned num_samples) +{ + while (num_samples-- > 0) + *dest++ = convertSample(*src++); +} + +static void +mpc_decode(struct decoder *mpd_decoder, struct input_stream *inStream) +{ + mpc_decoder decoder; + mpc_reader reader; + mpc_streaminfo info; + struct audio_format audio_format; + + MpcCallbackData data; + + MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH]; + + mpc_uint32_t ret; + int32_t chunk[G_N_ELEMENTS(sample_buffer)]; + long bitRate = 0; + unsigned long samplePos = 0; + mpc_uint32_t vbrUpdateAcc; + mpc_uint32_t vbrUpdateBits; + float total_time; + struct replay_gain_info *replayGainInfo = NULL; + enum decoder_command cmd = DECODE_COMMAND_NONE; + + data.inStream = inStream; + data.decoder = mpd_decoder; + + reader.read = mpc_read_cb; + reader.seek = mpc_seek_cb; + reader.tell = mpc_tell_cb; + reader.get_size = mpc_getsize_cb; + reader.canseek = mpc_canseek_cb; + reader.data = &data; + + mpc_streaminfo_init(&info); + + if ((ret = mpc_streaminfo_read(&info, &reader)) != ERROR_CODE_OK) { + if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP) + g_warning("Not a valid musepack stream\n"); + return; + } + + mpc_decoder_setup(&decoder, &reader); + + if (!mpc_decoder_initialize(&decoder, &info)) { + if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP) + g_warning("Not a valid musepack stream\n"); + return; + } + + audio_format.bits = 24; + audio_format.channels = info.channels; + audio_format.sample_rate = info.sample_freq; + + if (!audio_format_valid(&audio_format)) { + g_warning("Invalid audio format: %u:%u:%u\n", + audio_format.sample_rate, + audio_format.bits, + audio_format.channels); + return; + } + + replayGainInfo = replay_gain_info_new(); + replayGainInfo->tuples[REPLAY_GAIN_ALBUM].gain = info.gain_album * 0.01; + replayGainInfo->tuples[REPLAY_GAIN_ALBUM].peak = info.peak_album / 32767.0; + replayGainInfo->tuples[REPLAY_GAIN_TRACK].gain = info.gain_title * 0.01; + replayGainInfo->tuples[REPLAY_GAIN_TRACK].peak = info.peak_title / 32767.0; + + decoder_initialized(mpd_decoder, &audio_format, + inStream->seekable, + mpc_streaminfo_get_length(&info)); + + do { + if (cmd == DECODE_COMMAND_SEEK) { + samplePos = decoder_seek_where(mpd_decoder) * + audio_format.sample_rate; + if (mpc_decoder_seek_sample(&decoder, samplePos)) + decoder_command_finished(mpd_decoder); + else + decoder_seek_error(mpd_decoder); + } + + vbrUpdateAcc = 0; + vbrUpdateBits = 0; + ret = mpc_decoder_decode(&decoder, sample_buffer, + &vbrUpdateAcc, &vbrUpdateBits); + if (ret == 0 || ret == (mpc_uint32_t)-1) + break; + + samplePos += ret; + + ret *= info.channels; + + mpc_to_mpd_buffer(chunk, sample_buffer, ret); + + total_time = ((float)samplePos) / audio_format.sample_rate; + bitRate = vbrUpdateBits * audio_format.sample_rate + / 1152 / 1000; + + cmd = decoder_data(mpd_decoder, inStream, + chunk, ret * sizeof(chunk[0]), + total_time, + bitRate, replayGainInfo); + } while (cmd != DECODE_COMMAND_STOP); + + replay_gain_info_free(replayGainInfo); +} + +static float mpcGetTime(const char *file) +{ + struct input_stream inStream; + float total_time = -1; + + mpc_reader reader; + mpc_streaminfo info; + MpcCallbackData data; + + data.inStream = &inStream; + data.decoder = NULL; + + reader.read = mpc_read_cb; + reader.seek = mpc_seek_cb; + reader.tell = mpc_tell_cb; + reader.get_size = mpc_getsize_cb; + reader.canseek = mpc_canseek_cb; + reader.data = &data; + + mpc_streaminfo_init(&info); + + if (!input_stream_open(&inStream, file)) + return -1; + + if (mpc_streaminfo_read(&info, &reader) != ERROR_CODE_OK) { + input_stream_close(&inStream); + return -1; + } + + total_time = mpc_streaminfo_get_length(&info); + + input_stream_close(&inStream); + + return total_time; +} + +static struct tag *mpcTagDup(const char *file) +{ + float total_time = mpcGetTime(file); + struct tag *tag; + + if (total_time < 0) { + g_debug("mpcTagDup: Failed to get Songlength of file: %s\n", + file); + return NULL; + } + + tag = tag_new(); + tag->time = total_time; + return tag; +} + +static const char *const mpcSuffixes[] = { "mpc", NULL }; + +const struct decoder_plugin mpcdec_decoder_plugin = { + .name = "mpc", + .stream_decode = mpc_decode, + .tag_dup = mpcTagDup, + .suffixes = mpcSuffixes, +}; -- cgit v1.2.3