mpd/src/decoder/oggvorbis_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"
#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 */
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#include <glib.h>
#include <errno.h>
#include <stdlib.h>
#ifdef WORDS_BIGENDIAN
#define OGG_DECODE_USE_BIGENDIAN 1
#else
#define OGG_DECODE_USE_BIGENDIAN 0
#endif
typedef struct _OggCallbackData {
struct input_stream *inStream;
struct decoder *decoder;
} 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->inStream, ptr, size * nmemb);
errno = 0;
/*if(ret<0) errno = ((struct input_stream *)inStream)->error; */
return ret / size;
}
static int ogg_seek_cb(void *vdata, ogg_int64_t offset, int whence)
{
const OggCallbackData *data = (const OggCallbackData *) vdata;
if(decoder_get_command(data->decoder) == DECODE_COMMAND_STOP)
return -1;
return input_stream_seek(data->inStream, offset, whence) ? 0 : -1;
}
/* TODO: check Ogg libraries API and see if we can just not have this func */
static int ogg_close_cb(mpd_unused void *vdata)
{
return 0;
}
static long ogg_tell_cb(void *vdata)
{
const OggCallbackData *data = (const OggCallbackData *) vdata;
return (long)(data->inStream->offset);
}
static const char *ogg_parseComment(const char *comment, const char *needle)
{
int len = strlen(needle);
if (strncasecmp(comment, needle, len) == 0 && *(comment + len) == '=') {
return comment + len + 1;
}
return NULL;
}
static struct replay_gain_info *
ogg_getReplayGainInfo(char **comments)
{
struct replay_gain_info *rgi;
const char *temp;
bool found = false;
rgi = replay_gain_info_new();
while (*comments) {
if ((temp =
ogg_parseComment(*comments, "replaygain_track_gain"))) {
rgi->tuples[REPLAY_GAIN_TRACK].gain = atof(temp);
found = true;
} else if ((temp = ogg_parseComment(*comments,
"replaygain_album_gain"))) {
rgi->tuples[REPLAY_GAIN_ALBUM].gain = atof(temp);
found = true;
} else if ((temp = ogg_parseComment(*comments,
"replaygain_track_peak"))) {
rgi->tuples[REPLAY_GAIN_TRACK].peak = atof(temp);
found = true;
} else if ((temp = ogg_parseComment(*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";
static unsigned int ogg_parseCommentAddToTag(char *comment,
unsigned int itemType,
struct tag ** tag)
{
const char *needle;
unsigned int len;
switch (itemType) {
case TAG_ITEM_TRACK:
needle = VORBIS_COMMENT_TRACK_KEY;
break;
case TAG_ITEM_DISC:
needle = VORBIS_COMMENT_DISC_KEY;
break;
default:
needle = mpdTagItemKeys[itemType];
}
len = strlen(needle);
if (strncasecmp(comment, needle, len) == 0 && *(comment + len) == '=') {
if (!*tag)
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*tag = tag_new();
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tag_add_item(*tag, itemType, comment + len + 1);
return 1;
}
return 0;
}
static struct tag *oggCommentsParse(char **comments)
{
struct tag *tag = NULL;
while (*comments) {
int j;
for (j = TAG_NUM_OF_ITEM_TYPES; --j >= 0;) {
if (ogg_parseCommentAddToTag(*comments, j, &tag))
break;
}
comments++;
}
return tag;
}
static void putOggCommentsIntoOutputBuffer(struct decoder *decoder,
struct input_stream *is,
char **comments)
{
struct tag *tag;
tag = oggCommentsParse(comments);
if (!tag)
return;
decoder_tag(decoder, is, tag);
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tag_free(tag);
}
/* public */
static void
oggvorbis_decode(struct decoder *decoder, struct input_stream *inStream)
{
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 *replayGainInfo = NULL;
char **comments;
const char *errorStr;
bool initialized = false;
enum decoder_command cmd = DECODE_COMMAND_NONE;
if (ogg_stream_type_detect(inStream) != VORBIS)
return;
/* rewind the stream, because ogg_stream_type_detect() has
moved it */
input_stream_seek(inStream, 0, SEEK_SET);
data.inStream = inStream;
data.decoder = 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) {
if (decoder_get_command(decoder) != DECODE_COMMAND_NONE)
return;
switch (ret) {
case OV_EREAD:
errorStr = "read error";
break;
case OV_ENOTVORBIS:
errorStr = "not vorbis stream";
break;
case OV_EVERSION:
errorStr = "vorbis version mismatch";
break;
case OV_EBADHEADER:
errorStr = "invalid vorbis header";
break;
case OV_EFAULT:
errorStr = "internal logic error";
break;
default:
errorStr = "unknown error";
break;
}
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g_warning("Error decoding Ogg Vorbis stream: %s\n",
errorStr);
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 (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 (!initialized) {
float total_time = ov_time_total(&vf, -1);
if (total_time < 0)
total_time = 0;
decoder_initialized(decoder, &audio_format,
inStream->seekable,
total_time);
initialized = true;
}
comments = ov_comment(&vf, -1)->user_comments;
putOggCommentsIntoOutputBuffer(decoder, inStream,
comments);
new_rgi = ogg_getReplayGainInfo(comments);
if (new_rgi != NULL) {
if (replayGainInfo != NULL)
replay_gain_info_free(replayGainInfo);
replayGainInfo = new_rgi;
}
}
prev_section = current_section;
if (ret <= 0) {
if (ret == OV_HOLE) /* bad packet */
ret = 0;
else /* break on EOF or other error */
break;
}
if ((test = ov_bitrate_instant(&vf)) > 0)
bitRate = test / 1000;
cmd = decoder_data(decoder, inStream,
chunk, ret,
ov_pcm_tell(&vf) / audio_format.sample_rate,
bitRate, replayGainInfo);
} while (cmd != DECODE_COMMAND_STOP);
if (replayGainInfo)
replay_gain_info_free(replayGainInfo);
ov_clear(&vf);
}
static struct tag *oggvorbis_TagDup(const char *file)
{
struct tag *ret;
FILE *fp;
OggVorbis_File vf;
fp = fopen(file, "r");
if (!fp) {
return NULL;
}
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if (ov_open(fp, &vf, NULL, 0) < 0) {
fclose(fp);
return NULL;
}
ret = oggCommentsParse(ov_comment(&vf, -1)->user_comments);
if (!ret)
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ret = tag_new();
ret->time = (int)(ov_time_total(&vf, -1) + 0.5);
ov_clear(&vf);
return ret;
}
static const char *const oggvorbis_Suffixes[] = { "ogg","oga", NULL };
static const char *const oggvorbis_MimeTypes[] = {
"application/ogg",
"audio/x-vorbis+ogg",
"application/x-ogg",
NULL
};
const struct decoder_plugin oggvorbisPlugin = {
.name = "oggvorbis",
.stream_decode = oggvorbis_decode,
.tag_dup = oggvorbis_TagDup,
.suffixes = oggvorbis_Suffixes,
.mime_types = oggvorbis_MimeTypes
};