shout: moved code to audioOutput_shout_ogg.c

Begin dividing audioOutput_shout.c: move everything OGG Vorbis related
to audioOutput_shout_ogg.c.  The header audioOutput_shout.h has to
keep its dependency on vorbis/vorbisenc.h, because it needs the vorbis
encoder types.

For this patch, we have to export several internal functions with
generic names to the ABI; these will be removed later when the encoder
plugin patches are merged.

1 files changed, 190 insertions, 0 deletions

diff --git a/src/audioOutputs/audioOutput_shout_ogg.c b/src/audioOutputs/audioOutput_shout_ogg.c
new file mode 100644
index 000000000..8e7db7eed
--- /dev/null
+++ b/src/audioOutputs/audioOutput_shout_ogg.c
@@ -0,0 +1,190 @@
+/* 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 "audioOutput_shout.h"
+
+#ifdef HAVE_SHOUT
+
+#include "../utils.h"
+
+static void add_tag(struct shout_data *sd, const char *name, char *value)
+{
+	if (value) {
+		union const_hack u;
+		u.in = name;
+		vorbis_comment_add_tag(&(sd->vc), u.out, value);
+	}
+}
+
+void copy_tag_to_vorbis_comment(struct shout_data *sd)
+{
+	if (sd->tag) {
+		int i;
+
+		for (i = 0; i < sd->tag->numOfItems; i++) {
+			switch (sd->tag->items[i]->type) {
+			case TAG_ITEM_ARTIST:
+				add_tag(sd, "ARTIST", sd->tag->items[i]->value);
+				break;
+			case TAG_ITEM_ALBUM:
+				add_tag(sd, "ALBUM", sd->tag->items[i]->value);
+				break;
+			case TAG_ITEM_TITLE:
+				add_tag(sd, "TITLE", sd->tag->items[i]->value);
+				break;
+			default:
+				break;
+			}
+		}
+	}
+}
+
+void send_ogg_vorbis_header(struct shout_data *sd)
+{
+	vorbis_analysis_headerout(&(sd->vd), &(sd->vc), &(sd->header_main),
+				  &(sd->header_comments),
+				  &(sd->header_codebooks));
+
+	ogg_stream_packetin(&(sd->os), &(sd->header_main));
+	ogg_stream_packetin(&(sd->os), &(sd->header_comments));
+	ogg_stream_packetin(&(sd->os), &(sd->header_codebooks));
+}
+
+static void finish_encoder(struct shout_data *sd)
+{
+	vorbis_analysis_wrote(&sd->vd, 0);
+
+	while (vorbis_analysis_blockout(&sd->vd, &sd->vb) == 1) {
+		vorbis_analysis(&sd->vb, NULL);
+		vorbis_bitrate_addblock(&sd->vb);
+		while (vorbis_bitrate_flushpacket(&sd->vd, &sd->op)) {
+			ogg_stream_packetin(&sd->os, &sd->op);
+		}
+	}
+}
+
+static int flush_encoder(struct shout_data *sd)
+{
+	return (ogg_stream_pageout(&sd->os, &sd->og) > 0);
+}
+
+void shout_ogg_encoder_clear_encoder(struct shout_data *sd)
+{
+	finish_encoder(sd);
+	while (1 == flush_encoder(sd)) {
+		if (!sd->shout_error)
+			write_page(sd);
+	}
+
+	vorbis_comment_clear(&sd->vc);
+	ogg_stream_clear(&sd->os);
+	vorbis_block_clear(&sd->vb);
+	vorbis_dsp_clear(&sd->vd);
+	vorbis_info_clear(&sd->vi);
+}
+
+int init_encoder(struct shout_data *sd)
+{
+	vorbis_info_init(&(sd->vi));
+
+	if (sd->quality >= -1.0) {
+		if (0 != vorbis_encode_init_vbr(&(sd->vi),
+						sd->audio_format.channels,
+						sd->audio_format.sampleRate,
+						sd->quality * 0.1)) {
+			ERROR("problem setting up vorbis encoder for shout\n");
+			vorbis_info_clear(&(sd->vi));
+			return -1;
+		}
+	} else {
+		if (0 != vorbis_encode_init(&(sd->vi),
+					    sd->audio_format.channels,
+					    sd->audio_format.sampleRate, -1.0,
+					    sd->bitrate * 1000, -1.0)) {
+			ERROR("problem setting up vorbis encoder for shout\n");
+			vorbis_info_clear(&(sd->vi));
+			return -1;
+		}
+	}
+
+	vorbis_analysis_init(&(sd->vd), &(sd->vi));
+	vorbis_block_init(&(sd->vd), &(sd->vb));
+	ogg_stream_init(&(sd->os), rand());
+	vorbis_comment_init(&(sd->vc));
+
+	return 0;
+}
+
+int shout_ogg_encoder_send_metadata(struct shout_data * sd)
+{
+	shout_ogg_encoder_clear_encoder(sd);
+	if (init_encoder(sd) < 0)
+		return 0;
+
+	copy_tag_to_vorbis_comment(sd);
+
+	vorbis_analysis_headerout(&(sd->vd), &(sd->vc), &(sd->header_main),
+				  &(sd->header_comments),
+				  &(sd->header_codebooks));
+
+	ogg_stream_packetin(&(sd->os), &(sd->header_main));
+	ogg_stream_packetin(&(sd->os), &(sd->header_comments));
+	ogg_stream_packetin(&(sd->os), &(sd->header_codebooks));
+
+	while (ogg_stream_flush(&sd->os, &sd->og)) {
+		if (write_page(sd) < 0)
+			return -1;
+	}
+
+	return 0;
+}
+
+void shout_ogg_encoder_encode(struct shout_data *sd,
+			      const char *chunk, size_t size)
+{
+	unsigned int i;
+	int j;
+	float **vorbbuf;
+	unsigned int samples;
+	int bytes = sd->audio_format.bits / 8;
+
+	samples = size / (bytes * sd->audio_format.channels);
+	vorbbuf = vorbis_analysis_buffer(&(sd->vd), samples);
+
+	/* this is for only 16-bit audio */
+
+	for (i = 0; i < samples; i++) {
+		for (j = 0; j < sd->audio_format.channels; j++) {
+			vorbbuf[j][i] = (*((const mpd_sint16 *) chunk)) / 32768.0;
+			chunk += bytes;
+		}
+	}
+
+	vorbis_analysis_wrote(&(sd->vd), samples);
+
+	while (1 == vorbis_analysis_blockout(&(sd->vd), &(sd->vb))) {
+		vorbis_analysis(&(sd->vb), NULL);
+		vorbis_bitrate_addblock(&(sd->vb));
+
+		while (vorbis_bitrate_flushpacket(&(sd->vd), &(sd->op))) {
+			ogg_stream_packetin(&(sd->os), &(sd->op));
+		}
+	}
+}
+
+#endif