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Diffstat (limited to '')
-rw-r--r-- | trunk/src/inputPlugins/mpc_plugin.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/trunk/src/inputPlugins/mpc_plugin.c b/trunk/src/inputPlugins/mpc_plugin.c new file mode 100644 index 000000000..885f6cfc9 --- /dev/null +++ b/trunk/src/inputPlugins/mpc_plugin.c @@ -0,0 +1,359 @@ +/* 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 "../inputPlugin.h" + +#ifdef HAVE_MPCDEC + +#include "../utils.h" +#include "../audio.h" +#include "../log.h" +#include "../pcm_utils.h" +#include "../inputStream.h" +#include "../outputBuffer.h" +#include "../replayGain.h" + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <mpcdec/mpcdec.h> +#include <errno.h> +#include <math.h> + +typedef struct _MpcCallbackData { + InputStream *inStream; + DecoderControl *dc; +} MpcCallbackData; + +static mpc_int32_t mpc_read_cb(void *vdata, void *ptr, mpc_int32_t size) +{ + mpc_int32_t ret = 0; + MpcCallbackData *data = (MpcCallbackData *) vdata; + + while (1) { + ret = readFromInputStream(data->inStream, ptr, 1, size); + if (ret == 0 && !inputStreamAtEOF(data->inStream) && + (data->dc && !data->dc->stop)) { + my_usleep(10000); + } else + break; + } + + return ret; +} + +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 mpd_sint16 convertSample(MPC_SAMPLE_FORMAT sample) +{ + /* only doing 16-bit audio for now */ + mpd_sint32 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(OutputBuffer * cb, DecoderControl * dc, + InputStream * inStream) +{ + mpc_decoder decoder; + mpc_reader reader; + mpc_streaminfo info; + + 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; + mpd_sint16 *s16 = (mpd_sint16 *) chunk; + unsigned long samplePos = 0; + mpc_uint32_t vbrUpdateAcc; + mpc_uint32_t vbrUpdateBits; + float time; + int i; + ReplayGainInfo *replayGainInfo = NULL; + + data.inStream = inStream; + data.dc = dc; + + 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) { + closeInputStream(inStream); + if (!dc->stop) { + ERROR("Not a valid musepack stream"); + return -1; + } else { + dc->state = DECODE_STATE_STOP; + dc->stop = 0; + } + return 0; + } + + mpc_decoder_setup(&decoder, &reader); + + if (!mpc_decoder_initialize(&decoder, &info)) { + closeInputStream(inStream); + if (!dc->stop) { + ERROR("Not a valid musepack stream"); + } else { + dc->state = DECODE_STATE_STOP; + dc->stop = 0; + } + } + + dc->totalTime = mpc_streaminfo_get_length(&info); + + dc->audioFormat.bits = 16; + dc->audioFormat.channels = info.channels; + dc->audioFormat.sampleRate = info.sample_freq; + + getOutputAudioFormat(&(dc->audioFormat), &(cb->audioFormat)); + + 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; + + dc->state = DECODE_STATE_DECODE; + + while (!eof) { + if (dc->seek) { + samplePos = dc->seekWhere * dc->audioFormat.sampleRate; + if (mpc_decoder_seek_sample(&decoder, samplePos)) { + clearOutputBuffer(cb); + s16 = (mpd_sint16 *) chunk; + chunkpos = 0; + } else + dc->seekError = 1; + dc->seek = 0; + } + + vbrUpdateAcc = 0; + vbrUpdateBits = 0; + ret = mpc_decoder_decode(&decoder, sample_buffer, + &vbrUpdateAcc, &vbrUpdateBits); + + if (ret <= 0 || dc->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) { + time = ((float)samplePos) / + dc->audioFormat.sampleRate; + + bitRate = vbrUpdateBits * + dc->audioFormat.sampleRate / 1152 / 1000; + + sendDataToOutputBuffer(cb, inStream, dc, + inStream->seekable, + chunk, chunkpos, + time, + bitRate, replayGainInfo); + + chunkpos = 0; + s16 = (mpd_sint16 *) chunk; + if (dc->stop) { + eof = 1; + break; + } + } + } + } + + if (!dc->stop && chunkpos > 0) { + time = ((float)samplePos) / dc->audioFormat.sampleRate; + + bitRate = + vbrUpdateBits * dc->audioFormat.sampleRate / 1152 / 1000; + + sendDataToOutputBuffer(cb, NULL, dc, inStream->seekable, + chunk, chunkpos, time, bitRate, + replayGainInfo); + } + + closeInputStream(inStream); + + flushOutputBuffer(cb); + + freeReplayGainInfo(replayGainInfo); + + if (dc->stop) { + dc->state = DECODE_STATE_STOP; + dc->stop = 0; + } else { + dc->state = DECODE_STATE_STOP; + } + + return 0; +} + +static float mpcGetTime(char *file) +{ + InputStream inStream; + float time = -1; + + mpc_reader reader; + mpc_streaminfo info; + MpcCallbackData data; + + data.inStream = &inStream; + data.dc = 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; + } + + time = mpc_streaminfo_get_length(&info); + + closeInputStream(&inStream); + + return time; +} + +static MpdTag *mpcTagDup(char *file) +{ + MpdTag *ret = NULL; + float time = mpcGetTime(file); + + if (time < 0) { + DEBUG("mpcTagDup: Failed to get Songlength of file: %s\n", + file); + return NULL; + } + + ret = apeDup(file); + if (!ret) + ret = id3Dup(file); + if (!ret) + ret = newMpdTag(); + ret->time = time; + + return ret; +} + +static char *mpcSuffixes[] = { "mpc", NULL }; + +InputPlugin mpcPlugin = { + "mpc", + NULL, + NULL, + NULL, + mpc_decode, + NULL, + mpcTagDup, + INPUT_PLUGIN_STREAM_URL | INPUT_PLUGIN_STREAM_FILE, + mpcSuffixes, + NULL +}; + +#else + +InputPlugin mpcPlugin; + +#endif /* HAVE_MPCDEC */ |