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-rw-r--r--src/decoder/vorbis_plugin.c415
1 files changed, 415 insertions, 0 deletions
diff --git a/src/decoder/vorbis_plugin.c b/src/decoder/vorbis_plugin.c
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+++ b/src/decoder/vorbis_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
+ */
+
+/* TODO 'ogg' should probably be replaced with 'oggvorbis' in all instances */
+
+#include "_ogg_common.h"
+#include "config.h"
+#include "ls.h"
+
+#ifndef HAVE_TREMOR
+#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>
+
+#if G_BYTE_ORDER == G_BIG_ENDIAN
+#define OGG_DECODE_USE_BIGENDIAN 1
+#else
+#define OGG_DECODE_USE_BIGENDIAN 0
+#endif
+
+typedef struct _OggCallbackData {
+ struct decoder *decoder;
+
+ struct input_stream *input_stream;
+ bool seekable;
+} OggCallbackData;
+
+static size_t ogg_read_cb(void *ptr, size_t size, size_t nmemb, void *vdata)
+{
+ size_t ret;
+ OggCallbackData *data = (OggCallbackData *) vdata;
+
+ ret = decoder_read(data->decoder, data->input_stream, ptr, size * nmemb);
+
+ errno = 0;
+
+ return ret / size;
+}
+
+static int ogg_seek_cb(void *vdata, ogg_int64_t offset, int whence)
+{
+ const OggCallbackData *data = (const OggCallbackData *) vdata;
+
+ return data->seekable &&
+ decoder_get_command(data->decoder) != DECODE_COMMAND_STOP &&
+ input_stream_seek(data->input_stream, offset, whence)
+ ? 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 *vdata)
+{
+ return 0;
+}
+
+static long ogg_tell_cb(void *vdata)
+{
+ const OggCallbackData *data = (const OggCallbackData *) vdata;
+
+ return (long)data->input_stream->offset;
+}
+
+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 struct replay_gain_info *
+vorbis_comments_to_replay_gain(char **comments)
+{
+ struct replay_gain_info *rgi;
+ const char *temp;
+ bool found = false;
+
+ rgi = replay_gain_info_new();
+
+ 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++;
+ }
+
+ if (!found) {
+ replay_gain_info_free(rgi);
+ rgi = NULL;
+ }
+
+ return rgi;
+}
+
+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_ITEM_TRACK) ||
+ vorbis_copy_comment(tag, comment, VORBIS_COMMENT_DISC_KEY,
+ TAG_ITEM_DISC) ||
+ vorbis_copy_comment(tag, comment, "album artist",
+ TAG_ITEM_ALBUM_ARTIST))
+ return;
+
+ for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
+ if (vorbis_copy_comment(tag, comment,
+ mpdTagItemKeys[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);
+}
+
+static bool
+oggvorbis_seekable(struct decoder *decoder)
+{
+ char *uri;
+ bool seekable;
+
+ uri = decoder_get_uri(decoder);
+ /* disable seeking on remote streams, because libvorbis seeks
+ around like crazy, and due to being very expensive, this
+ delays song playback my 10 or 20 seconds */
+ seekable = !uri_has_scheme(uri);
+ g_free(uri);
+
+ return seekable;
+}
+
+/* public */
+static void
+vorbis_stream_decode(struct decoder *decoder,
+ struct input_stream *input_stream)
+{
+ OggVorbis_File vf;
+ ov_callbacks callbacks;
+ OggCallbackData data;
+ struct audio_format audio_format;
+ int current_section;
+ int prev_section = -1;
+ long ret;
+#define OGG_CHUNK_SIZE 4096
+ char chunk[OGG_CHUNK_SIZE];
+ long bitRate = 0;
+ long test;
+ struct replay_gain_info *replay_gain_info = NULL;
+ char **comments;
+ bool initialized = false;
+ 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);
+
+ data.decoder = decoder;
+ data.input_stream = input_stream;
+ data.seekable = input_stream->seekable && oggvorbis_seekable(decoder);
+
+ callbacks.read_func = ogg_read_cb;
+ callbacks.seek_func = ogg_seek_cb;
+ callbacks.close_func = ogg_close_cb;
+ callbacks.tell_func = ogg_tell_cb;
+ if ((ret = ov_open_callbacks(&data, &vf, NULL, 0, callbacks)) < 0) {
+ const char *error;
+
+ if (decoder_get_command(decoder) != DECODE_COMMAND_NONE)
+ return;
+
+ switch (ret) {
+ case OV_EREAD:
+ error = "read error";
+ break;
+ case OV_ENOTVORBIS:
+ error = "not vorbis stream";
+ break;
+ case OV_EVERSION:
+ error = "vorbis version mismatch";
+ break;
+ case OV_EBADHEADER:
+ error = "invalid vorbis header";
+ break;
+ case OV_EFAULT:
+ error = "internal logic error";
+ break;
+ default:
+ error = "unknown error";
+ break;
+ }
+
+ g_warning("Error decoding Ogg Vorbis stream: %s", error);
+ return;
+ }
+ audio_format.bits = 16;
+
+ 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) {
+ /*printf("new song!\n"); */
+ vorbis_info *vi = ov_info(&vf, -1);
+ struct replay_gain_info *new_rgi;
+
+ audio_format.channels = vi->channels;
+ audio_format.sample_rate = vi->rate;
+
+ if (!audio_format_valid(&audio_format)) {
+ g_warning("Invalid audio format: %u:%u:%u\n",
+ audio_format.sample_rate,
+ audio_format.bits,
+ audio_format.channels);
+ break;
+ }
+
+ if (!initialized) {
+ float total_time = ov_time_total(&vf, -1);
+ if (total_time < 0)
+ total_time = 0;
+ decoder_initialized(decoder, &audio_format,
+ data.seekable,
+ total_time);
+ initialized = true;
+ }
+ comments = ov_comment(&vf, -1)->user_comments;
+ vorbis_send_comments(decoder, input_stream, comments);
+ new_rgi = vorbis_comments_to_replay_gain(comments);
+ if (new_rgi != NULL) {
+ if (replay_gain_info != NULL)
+ replay_gain_info_free(replay_gain_info);
+ replay_gain_info = new_rgi;
+ }
+ }
+
+ prev_section = current_section;
+
+ if ((test = ov_bitrate_instant(&vf)) > 0)
+ bitRate = test / 1000;
+
+ cmd = decoder_data(decoder, input_stream,
+ chunk, ret,
+ ov_pcm_tell(&vf) / audio_format.sample_rate,
+ bitRate, replay_gain_info);
+ } while (cmd != DECODE_COMMAND_STOP);
+
+ if (replay_gain_info)
+ replay_gain_info_free(replay_gain_info);
+
+ ov_clear(&vf);
+}
+
+static struct tag *
+vorbis_tag_dup(const char *file)
+{
+ struct tag *ret;
+ FILE *fp;
+ OggVorbis_File vf;
+
+ fp = fopen(file, "r");
+ if (!fp) {
+ return NULL;
+ }
+
+ if (ov_open(fp, &vf, NULL, 0) < 0) {
+ fclose(fp);
+ return NULL;
+ }
+
+ ret = vorbis_comments_to_tag(ov_comment(&vf, -1)->user_comments);
+
+ if (!ret)
+ ret = tag_new();
+ ret->time = (int)(ov_time_total(&vf, -1) + 0.5);
+
+ ov_clear(&vf);
+
+ return ret;
+}
+
+static const char *const vorbis_suffixes[] = {
+ "ogg", "oga", NULL
+};
+
+static const char *const vorbis_mime_types[] = {
+ "application/ogg",
+ "audio/x-vorbis+ogg",
+ "application/x-ogg",
+ NULL
+};
+
+const struct decoder_plugin vorbis_decoder_plugin = {
+ .name = "vorbis",
+ .stream_decode = vorbis_stream_decode,
+ .tag_dup = vorbis_tag_dup,
+ .suffixes = vorbis_suffixes,
+ .mime_types = vorbis_mime_types
+};