/* 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" #ifdef HAVE_MPCDEC #include "../utils.h" #include "../log.h" #include <mpcdec/mpcdec.h> typedef struct _MpcCallbackData { InputStream *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 seekInputStream(data->inStream, offset, SEEK_SET) < 0 ? 0 : 1; } 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 int16_t convertSample(MPC_SAMPLE_FORMAT sample) { /* only doing 16-bit audio for now */ int32_t val; const int clip_min = -1 << (16 - 1); const int clip_max = (1 << (16 - 1)) - 1; #ifdef MPC_FIXED_POINT const int shift = 16 - MPC_FIXED_POINT_SCALE_SHIFT; if (sample > 0) { sample <<= shift; } else if (shift < 0) { sample >>= -shift; } val = sample; #else const int float_scale = 1 << (16 - 1); val = sample * float_scale; #endif if (val < clip_min) val = clip_min; else if (val > clip_max) val = clip_max; return val; } static int mpc_decode(struct decoder * mpd_decoder, InputStream * 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]; int eof = 0; long ret; #define MPC_CHUNK_SIZE 4096 char chunk[MPC_CHUNK_SIZE]; int chunkpos = 0; long bitRate = 0; int16_t *s16 = (int16_t *) chunk; unsigned long samplePos = 0; mpc_uint32_t vbrUpdateAcc; mpc_uint32_t vbrUpdateBits; float total_time; int i; ReplayGainInfo *replayGainInfo = NULL; 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) { ERROR("Not a valid musepack stream\n"); return -1; } return 0; } mpc_decoder_setup(&decoder, &reader); if (!mpc_decoder_initialize(&decoder, &info)) { if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP) { ERROR("Not a valid musepack stream\n"); return -1; } return 0; } audio_format.bits = 16; audio_format.channels = info.channels; audio_format.sampleRate = info.sample_freq; replayGainInfo = newReplayGainInfo(); replayGainInfo->albumGain = info.gain_album * 0.01; replayGainInfo->albumPeak = info.peak_album / 32767.0; replayGainInfo->trackGain = info.gain_title * 0.01; replayGainInfo->trackPeak = info.peak_title / 32767.0; decoder_initialized(mpd_decoder, &audio_format, mpc_streaminfo_get_length(&info)); while (!eof) { if (decoder_get_command(mpd_decoder) == DECODE_COMMAND_SEEK) { samplePos = decoder_seek_where(mpd_decoder) * audio_format.sampleRate; if (mpc_decoder_seek_sample(&decoder, samplePos)) { decoder_clear(mpd_decoder); s16 = (int16_t *) chunk; chunkpos = 0; 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 || decoder_get_command(mpd_decoder) == DECODE_COMMAND_STOP) { eof = 1; break; } samplePos += ret; /* ret is in samples, and we have stereo */ ret *= 2; for (i = 0; i < ret; i++) { /* 16 bit audio again */ *s16 = convertSample(sample_buffer[i]); chunkpos += 2; s16++; if (chunkpos >= MPC_CHUNK_SIZE) { total_time = ((float)samplePos) / audio_format.sampleRate; bitRate = vbrUpdateBits * audio_format.sampleRate / 1152 / 1000; decoder_data(mpd_decoder, inStream, inStream->seekable, chunk, chunkpos, total_time, bitRate, replayGainInfo); chunkpos = 0; s16 = (int16_t *) chunk; if (decoder_get_command(mpd_decoder) == DECODE_COMMAND_STOP) { eof = 1; break; } } } } if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP && chunkpos > 0) { total_time = ((float)samplePos) / audio_format.sampleRate; bitRate = vbrUpdateBits * audio_format.sampleRate / 1152 / 1000; decoder_data(mpd_decoder, NULL, inStream->seekable, chunk, chunkpos, total_time, bitRate, replayGainInfo); } decoder_flush(mpd_decoder); freeReplayGainInfo(replayGainInfo); return 0; } static float mpcGetTime(char *file) { InputStream 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 (openInputStream(&inStream, file) < 0) { DEBUG("mpcGetTime: Failed to open file: %s\n", file); return -1; } if (mpc_streaminfo_read(&info, &reader) != ERROR_CODE_OK) { closeInputStream(&inStream); return -1; } total_time = mpc_streaminfo_get_length(&info); closeInputStream(&inStream); return total_time; } static struct tag *mpcTagDup(char *file) { struct tag *ret = NULL; float total_time = mpcGetTime(file); if (total_time < 0) { DEBUG("mpcTagDup: Failed to get Songlength of file: %s\n", file); return NULL; } ret = tag_ape_load(file); if (!ret) ret = tag_id3_load(file); if (!ret) ret = tag_new(); ret->time = total_time; return ret; } static const char *mpcSuffixes[] = { "mpc", NULL }; struct decoder_plugin mpcPlugin = { .name = "mpc", .stream_decode = mpc_decode, .tag_dup = mpcTagDup, .stream_types = INPUT_PLUGIN_STREAM_URL | INPUT_PLUGIN_STREAM_FILE, .suffixes = mpcSuffixes, }; #else struct decoder_plugin mpcPlugin; #endif /* HAVE_MPCDEC */