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-rw-r--r--src/decoder/mpc_plugin.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/src/decoder/mpc_plugin.c b/src/decoder/mpc_plugin.c
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+++ b/src/decoder/mpc_plugin.c
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+/* 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 "../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.sample_rate = 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.sample_rate;
+ 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.sample_rate;
+
+ bitRate = vbrUpdateBits *
+ audio_format.sample_rate / 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.sample_rate;
+
+ bitRate =
+ vbrUpdateBits * audio_format.sample_rate / 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,
+};