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-rw-r--r--src/decoder/mpcdec_decoder_plugin.c339
1 files changed, 339 insertions, 0 deletions
diff --git a/src/decoder/mpcdec_decoder_plugin.c b/src/decoder/mpcdec_decoder_plugin.c
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index 000000000..92f0cad84
--- /dev/null
+++ b/src/decoder/mpcdec_decoder_plugin.c
@@ -0,0 +1,339 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "decoder_api.h"
+#include "audio_check.h"
+
+#ifdef MPC_IS_OLD_API
+#include <mpcdec/mpcdec.h>
+#else
+#include <mpc/mpcdec.h>
+#endif
+
+#include <glib.h>
+#include <assert.h>
+#include <unistd.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "mpcdec"
+
+struct mpc_decoder_data {
+ struct input_stream *is;
+ struct decoder *decoder;
+};
+
+#ifdef MPC_IS_OLD_API
+#define cb_first_arg void *vdata
+#define cb_data vdata
+#else
+#define cb_first_arg mpc_reader *reader
+#define cb_data reader->data
+#endif
+
+static mpc_int32_t
+mpc_read_cb(cb_first_arg, void *ptr, mpc_int32_t size)
+{
+ struct mpc_decoder_data *data = (struct mpc_decoder_data *) cb_data;
+
+ return decoder_read(data->decoder, data->is, ptr, size);
+}
+
+static mpc_bool_t
+mpc_seek_cb(cb_first_arg, mpc_int32_t offset)
+{
+ struct mpc_decoder_data *data = (struct mpc_decoder_data *) cb_data;
+
+ return input_stream_seek(data->is, offset, SEEK_SET, NULL);
+}
+
+static mpc_int32_t
+mpc_tell_cb(cb_first_arg)
+{
+ struct mpc_decoder_data *data = (struct mpc_decoder_data *) cb_data;
+
+ return (long)(data->is->offset);
+}
+
+static mpc_bool_t
+mpc_canseek_cb(cb_first_arg)
+{
+ struct mpc_decoder_data *data = (struct mpc_decoder_data *) cb_data;
+
+ return data->is->seekable;
+}
+
+static mpc_int32_t
+mpc_getsize_cb(cb_first_arg)
+{
+ struct mpc_decoder_data *data = (struct mpc_decoder_data *) cb_data;
+
+ return data->is->size;
+}
+
+/* this _looks_ performance-critical, don't de-inline -- eric */
+static inline int32_t
+mpc_to_mpd_sample(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++ = mpc_to_mpd_sample(*src++);
+}
+
+static void
+mpcdec_decode(struct decoder *mpd_decoder, struct input_stream *is)
+{
+#ifdef MPC_IS_OLD_API
+ mpc_decoder decoder;
+#else
+ mpc_demux *demux;
+ mpc_frame_info frame;
+ mpc_status status;
+#endif
+ mpc_reader reader;
+ mpc_streaminfo info;
+ GError *error = NULL;
+ struct audio_format audio_format;
+
+ struct mpc_decoder_data data;
+
+ MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH];
+
+ mpc_uint32_t ret;
+ int32_t chunk[G_N_ELEMENTS(sample_buffer)];
+ long bit_rate = 0;
+ mpc_uint32_t vbr_update_acc;
+ mpc_uint32_t vbr_update_bits;
+ struct replay_gain_info *replay_gain_info = NULL;
+ enum decoder_command cmd = DECODE_COMMAND_NONE;
+
+ data.is = is;
+ 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;
+
+#ifdef MPC_IS_OLD_API
+ 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;
+ }
+#else
+ demux = mpc_demux_init(&reader);
+ if (demux == NULL) {
+ if (decoder_get_command(mpd_decoder) != DECODE_COMMAND_STOP)
+ g_warning("Not a valid musepack stream");
+ return;
+ }
+
+ mpc_demux_get_info(demux, &info);
+#endif
+
+ if (!audio_format_init_checked(&audio_format, info.sample_freq,
+ SAMPLE_FORMAT_S24_P32,
+ info.channels, &error)) {
+ g_warning("%s", error->message);
+ g_error_free(error);
+#ifndef MPC_IS_OLD_API
+ mpc_demux_exit(demux);
+#endif
+ return;
+ }
+
+ replay_gain_info = replay_gain_info_new();
+ replay_gain_info->tuples[REPLAY_GAIN_ALBUM].gain = info.gain_album * 0.01;
+ replay_gain_info->tuples[REPLAY_GAIN_ALBUM].peak = info.peak_album / 32767.0;
+ replay_gain_info->tuples[REPLAY_GAIN_TRACK].gain = info.gain_title * 0.01;
+ replay_gain_info->tuples[REPLAY_GAIN_TRACK].peak = info.peak_title / 32767.0;
+ decoder_replay_gain(mpd_decoder, replay_gain_info);
+ replay_gain_info_free(replay_gain_info);
+
+ decoder_initialized(mpd_decoder, &audio_format,
+ is->seekable,
+ mpc_streaminfo_get_length(&info));
+
+ do {
+ if (cmd == DECODE_COMMAND_SEEK) {
+ mpc_int64_t where = decoder_seek_where(mpd_decoder) *
+ audio_format.sample_rate;
+ bool success;
+
+#ifdef MPC_IS_OLD_API
+ success = mpc_decoder_seek_sample(&decoder, where);
+#else
+ success = mpc_demux_seek_sample(demux, where)
+ == MPC_STATUS_OK;
+#endif
+ if (success)
+ decoder_command_finished(mpd_decoder);
+ else
+ decoder_seek_error(mpd_decoder);
+ }
+
+ vbr_update_acc = 0;
+ vbr_update_bits = 0;
+
+#ifdef MPC_IS_OLD_API
+ ret = mpc_decoder_decode(&decoder, sample_buffer,
+ &vbr_update_acc, &vbr_update_bits);
+ if (ret == 0 || ret == (mpc_uint32_t)-1)
+ break;
+#else
+ frame.buffer = (MPC_SAMPLE_FORMAT *)sample_buffer;
+ status = mpc_demux_decode(demux, &frame);
+ if (status != MPC_STATUS_OK) {
+ g_warning("Failed to decode sample");
+ break;
+ }
+
+ if (frame.bits == -1)
+ break;
+
+ ret = frame.samples;
+#endif
+
+ ret *= info.channels;
+
+ mpc_to_mpd_buffer(chunk, sample_buffer, ret);
+
+ bit_rate = vbr_update_bits * audio_format.sample_rate
+ / 1152 / 1000;
+
+ cmd = decoder_data(mpd_decoder, is,
+ chunk, ret * sizeof(chunk[0]),
+ bit_rate);
+ } while (cmd != DECODE_COMMAND_STOP);
+
+#ifndef MPC_IS_OLD_API
+ mpc_demux_exit(demux);
+#endif
+}
+
+static float
+mpcdec_get_file_duration(struct input_stream *is)
+{
+ float total_time = -1;
+
+ mpc_reader reader;
+#ifndef MPC_IS_OLD_API
+ mpc_demux *demux;
+#endif
+ mpc_streaminfo info;
+ struct mpc_decoder_data data;
+
+ data.is = is;
+ 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;
+
+#ifdef MPC_IS_OLD_API
+ mpc_streaminfo_init(&info);
+
+ if (mpc_streaminfo_read(&info, &reader) != ERROR_CODE_OK)
+ return -1;
+#else
+ demux = mpc_demux_init(&reader);
+ if (demux == NULL)
+ return -1;
+
+ mpc_demux_get_info(demux, &info);
+ mpc_demux_exit(demux);
+#endif
+
+ total_time = mpc_streaminfo_get_length(&info);
+
+ return total_time;
+}
+
+static struct tag *
+mpcdec_stream_tag(struct input_stream *is)
+{
+ float total_time = mpcdec_get_file_duration(is);
+ struct tag *tag;
+
+ if (total_time < 0)
+ return NULL;
+
+ tag = tag_new();
+ tag->time = total_time;
+ return tag;
+}
+
+static const char *const mpcdec_suffixes[] = { "mpc", NULL };
+
+const struct decoder_plugin mpcdec_decoder_plugin = {
+ .name = "mpcdec",
+ .stream_decode = mpcdec_decode,
+ .stream_tag = mpcdec_stream_tag,
+ .suffixes = mpcdec_suffixes,
+};