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-rw-r--r--src/decoder/pcm_decoder_plugin.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/src/decoder/pcm_decoder_plugin.c b/src/decoder/pcm_decoder_plugin.c
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index 000000000..fc7dffc05
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+++ b/src/decoder/pcm_decoder_plugin.c
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+/*
+ * Copyright (C) 2003-2011 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/pcm_decoder_plugin.h"
+#include "decoder_api.h"
+#include "util/byte_reverse.h"
+
+#include <glib.h>
+#include <unistd.h>
+#include <stdio.h> /* for SEEK_SET */
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "pcm"
+
+static void
+pcm_stream_decode(struct decoder *decoder, struct input_stream *is)
+{
+ static const struct audio_format audio_format = {
+ .sample_rate = 44100,
+ .format = SAMPLE_FORMAT_S16,
+ .channels = 2,
+ };
+
+ const bool reverse_endian = is->mime != NULL &&
+ strcmp(is->mime, "audio/x-mpd-cdda-pcm-reverse") == 0;
+
+ GError *error = NULL;
+ enum decoder_command cmd;
+
+ double time_to_size = audio_format_time_to_size(&audio_format);
+
+ float total_time = -1;
+ if (is->size >= 0)
+ total_time = is->size / time_to_size;
+
+ decoder_initialized(decoder, &audio_format, is->seekable, total_time);
+
+ do {
+ char buffer[4096];
+
+ size_t nbytes = decoder_read(decoder, is,
+ buffer, sizeof(buffer));
+
+ if (nbytes == 0 && input_stream_lock_eof(is))
+ break;
+
+ if (reverse_endian)
+ /* make sure we deliver samples in host byte order */
+ reverse_bytes_16((uint16_t *)buffer,
+ (uint16_t *)buffer,
+ (uint16_t *)(buffer + nbytes));
+
+ cmd = nbytes > 0
+ ? decoder_data(decoder, is,
+ buffer, nbytes, 0)
+ : decoder_get_command(decoder);
+ if (cmd == DECODE_COMMAND_SEEK) {
+ goffset offset = (goffset)(time_to_size *
+ decoder_seek_where(decoder));
+ if (input_stream_lock_seek(is, offset, SEEK_SET,
+ &error)) {
+ decoder_command_finished(decoder);
+ } else {
+ g_warning("seeking failed: %s", error->message);
+ g_error_free(error);
+ decoder_seek_error(decoder);
+ }
+
+ cmd = DECODE_COMMAND_NONE;
+ }
+ } while (cmd == DECODE_COMMAND_NONE);
+}
+
+static const char *const pcm_mime_types[] = {
+ /* for streams obtained by the cdio_paranoia input plugin */
+ "audio/x-mpd-cdda-pcm",
+
+ /* same as above, but with reverse byte order */
+ "audio/x-mpd-cdda-pcm-reverse",
+
+ NULL
+};
+
+const struct decoder_plugin pcm_decoder_plugin = {
+ .name = "pcm",
+ .stream_decode = pcm_stream_decode,
+ .mime_types = pcm_mime_types,
+};