1 files changed, 415 insertions, 0 deletions
diff --git a/src/decoder/vorbis_decoder_plugin.c b/src/decoder/vorbis_decoder_plugin.c
new file mode 100644
index 000000000..0a3944ad6
--- /dev/null
+++ b/src/decoder/vorbis_decoder_plugin.c
@@ -0,0 +1,415 @@
+/*
+ * 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 "_ogg_common.h"
+#include "audio_check.h"
+#include "uri.h"
+
+#ifndef HAVE_TREMOR
+#define OV_EXCLUDE_STATIC_CALLBACKS
+#include <vorbis/vorbisfile.h>
+#else
+#include <tremor/ivorbisfile.h>
+/* Macros to make Tremor's API look like libogg. Tremor always
+   returns host-byte-order 16-bit signed data, and uses integer
+   milliseconds where libogg uses double seconds.
+*/
+#define ov_read(VF, BUFFER, LENGTH, BIGENDIANP, WORD, SGNED, BITSTREAM) \
+        ov_read(VF, BUFFER, LENGTH, BITSTREAM)
+#define ov_time_total(VF, I) ((double)ov_time_total(VF, I)/1000)
+#define ov_time_tell(VF) ((double)ov_time_tell(VF)/1000)
+#define ov_time_seek_page(VF, S) (ov_time_seek_page(VF, (S)*1000))
+#endif /* HAVE_TREMOR */
+
+#include <glib.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "vorbis"
+#define OGG_CHUNK_SIZE 4096
+
+#if G_BYTE_ORDER == G_BIG_ENDIAN
+#define OGG_DECODE_USE_BIGENDIAN	1
+#else
+#define OGG_DECODE_USE_BIGENDIAN	0
+#endif
+
+struct vorbis_input_stream {
+	struct decoder *decoder;
+
+	struct input_stream *input_stream;
+	bool seekable;
+};
+
+static size_t ogg_read_cb(void *ptr, size_t size, size_t nmemb, void *data)
+{
+	struct vorbis_input_stream *vis = data;
+	size_t ret;
+
+	ret = decoder_read(vis->decoder, vis->input_stream, ptr, size * nmemb);
+
+	errno = 0;
+
+	return ret / size;
+}
+
+static int ogg_seek_cb(void *data, ogg_int64_t offset, int whence)
+{
+	struct vorbis_input_stream *vis = data;
+
+	return vis->seekable &&
+		(!vis->decoder || decoder_get_command(vis->decoder) != DECODE_COMMAND_STOP) &&
+		input_stream_seek(vis->input_stream, offset, whence, NULL)
+		? 0 : -1;
+}
+
+/* TODO: check Ogg libraries API and see if we can just not have this func */
+static int ogg_close_cb(G_GNUC_UNUSED void *data)
+{
+	return 0;
+}
+
+static long ogg_tell_cb(void *data)
+{
+	const struct vorbis_input_stream *vis = data;
+
+	return (long)vis->input_stream->offset;
+}
+
+static const ov_callbacks vorbis_is_callbacks = {
+	.read_func = ogg_read_cb,
+	.seek_func = ogg_seek_cb,
+	.close_func = ogg_close_cb,
+	.tell_func = ogg_tell_cb,
+};
+
+static const char *
+vorbis_strerror(int code)
+{
+	switch (code) {
+	case OV_EREAD:
+		return "read error";
+
+	case OV_ENOTVORBIS:
+		return "not vorbis stream";
+
+	case OV_EVERSION:
+		return "vorbis version mismatch";
+
+	case OV_EBADHEADER:
+		return "invalid vorbis header";
+
+	case OV_EFAULT:
+		return "internal logic error";
+
+	default:
+		return "unknown error";
+	}
+}
+
+static bool
+vorbis_is_open(struct vorbis_input_stream *vis, OggVorbis_File *vf,
+	       struct decoder *decoder, struct input_stream *input_stream)
+{
+	vis->decoder = decoder;
+	vis->input_stream = input_stream;
+	vis->seekable = input_stream->seekable &&
+		(input_stream->uri == NULL ||
+		 !uri_has_scheme(input_stream->uri));
+
+	int ret = ov_open_callbacks(vis, vf, NULL, 0, vorbis_is_callbacks);
+	if (ret < 0) {
+		if (decoder == NULL ||
+		    decoder_get_command(decoder) == DECODE_COMMAND_NONE)
+			g_warning("Failed to open Ogg Vorbis stream: %s",
+				  vorbis_strerror(ret));
+		return false;
+	}
+
+	return true;
+}
+
+static const char *
+vorbis_comment_value(const char *comment, const char *needle)
+{
+	size_t len = strlen(needle);
+
+	if (g_ascii_strncasecmp(comment, needle, len) == 0 &&
+	    comment[len] == '=')
+		return comment + len + 1;
+
+	return NULL;
+}
+
+static bool
+vorbis_comments_to_replay_gain(struct replay_gain_info *rgi, char **comments)
+{
+	const char *temp;
+	bool found = false;
+
+	replay_gain_info_init(rgi);
+
+	while (*comments) {
+		if ((temp =
+		     vorbis_comment_value(*comments, "replaygain_track_gain"))) {
+			rgi->tuples[REPLAY_GAIN_TRACK].gain = atof(temp);
+			found = true;
+		} else if ((temp = vorbis_comment_value(*comments,
+							"replaygain_album_gain"))) {
+			rgi->tuples[REPLAY_GAIN_ALBUM].gain = atof(temp);
+			found = true;
+		} else if ((temp = vorbis_comment_value(*comments,
+							"replaygain_track_peak"))) {
+			rgi->tuples[REPLAY_GAIN_TRACK].peak = atof(temp);
+			found = true;
+		} else if ((temp = vorbis_comment_value(*comments,
+							"replaygain_album_peak"))) {
+			rgi->tuples[REPLAY_GAIN_ALBUM].peak = atof(temp);
+			found = true;
+		}
+
+		comments++;
+	}
+
+	return found;
+}
+
+static const char *VORBIS_COMMENT_TRACK_KEY = "tracknumber";
+static const char *VORBIS_COMMENT_DISC_KEY = "discnumber";
+
+/**
+ * Check if the comment's name equals the passed name, and if so, copy
+ * the comment value into the tag.
+ */
+static bool
+vorbis_copy_comment(struct tag *tag, const char *comment,
+		    const char *name, enum tag_type tag_type)
+{
+	const char *value;
+
+	value = vorbis_comment_value(comment, name);
+	if (value != NULL) {
+		tag_add_item(tag, tag_type, value);
+		return true;
+	}
+
+	return false;
+}
+
+static void
+vorbis_parse_comment(struct tag *tag, const char *comment)
+{
+	assert(tag != NULL);
+
+	if (vorbis_copy_comment(tag, comment, VORBIS_COMMENT_TRACK_KEY,
+				TAG_TRACK) ||
+	    vorbis_copy_comment(tag, comment, VORBIS_COMMENT_DISC_KEY,
+				TAG_DISC) ||
+	    vorbis_copy_comment(tag, comment, "album artist",
+				TAG_ALBUM_ARTIST))
+		return;
+
+	for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
+		if (vorbis_copy_comment(tag, comment,
+					tag_item_names[i], i))
+			return;
+}
+
+static struct tag *
+vorbis_comments_to_tag(char **comments)
+{
+	struct tag *tag = tag_new();
+
+	while (*comments)
+		vorbis_parse_comment(tag, *comments++);
+
+	if (tag_is_empty(tag)) {
+		tag_free(tag);
+		tag = NULL;
+	}
+
+	return tag;
+}
+
+static void
+vorbis_send_comments(struct decoder *decoder, struct input_stream *is,
+		     char **comments)
+{
+	struct tag *tag;
+
+	tag = vorbis_comments_to_tag(comments);
+	if (!tag)
+		return;
+
+	decoder_tag(decoder, is, tag);
+	tag_free(tag);
+}
+
+/* public */
+static void
+vorbis_stream_decode(struct decoder *decoder,
+		     struct input_stream *input_stream)
+{
+	GError *error = NULL;
+	OggVorbis_File vf;
+	struct vorbis_input_stream vis;
+	struct audio_format audio_format;
+	float total_time;
+	int current_section;
+	int prev_section = -1;
+	long ret;
+	char chunk[OGG_CHUNK_SIZE];
+	long bitRate = 0;
+	long test;
+	const vorbis_info *vi;
+	enum decoder_command cmd = DECODE_COMMAND_NONE;
+
+	if (ogg_stream_type_detect(input_stream) != VORBIS)
+		return;
+
+	/* rewind the stream, because ogg_stream_type_detect() has
+	   moved it */
+	input_stream_seek(input_stream, 0, SEEK_SET, NULL);
+
+	if (!vorbis_is_open(&vis, &vf, decoder, input_stream))
+		return;
+
+	vi = ov_info(&vf, -1);
+	if (vi == NULL) {
+		g_warning("ov_info() has failed");
+		return;
+	}
+
+	if (!audio_format_init_checked(&audio_format, vi->rate,
+				       SAMPLE_FORMAT_S16,
+				       vi->channels, &error)) {
+		g_warning("%s", error->message);
+		g_error_free(error);
+		return;
+	}
+
+	total_time = ov_time_total(&vf, -1);
+	if (total_time < 0)
+		total_time = 0;
+
+	decoder_initialized(decoder, &audio_format, vis.seekable, total_time);
+
+	do {
+		if (cmd == DECODE_COMMAND_SEEK) {
+			double seek_where = decoder_seek_where(decoder);
+			if (0 == ov_time_seek_page(&vf, seek_where)) {
+				decoder_command_finished(decoder);
+			} else
+				decoder_seek_error(decoder);
+		}
+
+		ret = ov_read(&vf, chunk, sizeof(chunk),
+			      OGG_DECODE_USE_BIGENDIAN, 2, 1, &current_section);
+		if (ret == OV_HOLE) /* bad packet */
+			ret = 0;
+		else if (ret <= 0)
+			/* break on EOF or other error */
+			break;
+
+		if (current_section != prev_section) {
+			char **comments;
+
+			vi = ov_info(&vf, -1);
+			if (vi == NULL) {
+				g_warning("ov_info() has failed");
+				break;
+			}
+
+			if (vi->rate != (long)audio_format.sample_rate ||
+			    vi->channels != (int)audio_format.channels) {
+				/* we don't support audio format
+				   change yet */
+				g_warning("audio format change, stopping here");
+				break;
+			}
+
+			comments = ov_comment(&vf, -1)->user_comments;
+			vorbis_send_comments(decoder, input_stream, comments);
+
+			struct replay_gain_info rgi;
+			if (vorbis_comments_to_replay_gain(&rgi, comments))
+				decoder_replay_gain(decoder, &rgi);
+
+			prev_section = current_section;
+		}
+
+		if ((test = ov_bitrate_instant(&vf)) > 0)
+			bitRate = test / 1000;
+
+		cmd = decoder_data(decoder, input_stream,
+				   chunk, ret,
+				   bitRate);
+	} while (cmd != DECODE_COMMAND_STOP);
+
+	ov_clear(&vf);
+}
+
+static struct tag *
+vorbis_stream_tag(struct input_stream *is)
+{
+	struct vorbis_input_stream vis;
+	OggVorbis_File vf;
+
+	if (!vorbis_is_open(&vis, &vf, NULL, is))
+		return NULL;
+
+	struct tag *tag = vorbis_comments_to_tag(ov_comment(&vf, -1)->user_comments);
+
+	if (tag == NULL)
+		tag = tag_new();
+	tag->time = (int)(ov_time_total(&vf, -1) + 0.5);
+
+	ov_clear(&vf);
+
+	return tag;
+}
+
+static const char *const vorbis_suffixes[] = {
+	"ogg", "oga", NULL
+};
+
+static const char *const vorbis_mime_types[] = {
+	"application/ogg",
+	"application/x-ogg",
+	"audio/ogg",
+	"audio/vorbis",
+	"audio/vorbis+ogg",
+	"audio/x-ogg",
+	"audio/x-vorbis",
+	"audio/x-vorbis+ogg",
+	NULL
+};
+
+const struct decoder_plugin vorbis_decoder_plugin = {
+	.name = "vorbis",
+	.stream_decode = vorbis_stream_decode,
+	.stream_tag = vorbis_stream_tag,
+	.suffixes = vorbis_suffixes,
+	.mime_types = vorbis_mime_types
+};