Add OggFLAC support when using the new 1.1.3 FLAC library

This means that when using libFLAC as a shared object,
OggFLAC support is dependent on the compile-time options of
the libFLAC library loaded.

git-svn-id: https://svn.musicpd.org/mpd/trunk@5112 09075e82-0dd4-0310-85a5-a0d7c8717e4f

2 files changed, 119 insertions, 22 deletions

diff --git a/src/inputPlugins/_flac_common.h b/src/inputPlugins/_flac_common.h
index eab7971e5..2dd5517e5 100644
--- a/src/inputPlugins/_flac_common.h
+++ b/src/inputPlugins/_flac_common.h
@@ -36,6 +36,8 @@
 #  define flac_decoder           FLAC__SeekableStreamDecoder
 #  define flac_new(x)            FLAC__seekable_stream_decoder_new(x)
 
+#  define flac_ogg_init(a,b,c,d,e,f,g,h,i,j) (0)
+
 #  define flac_get_decode_position(x,y) \
                  FLAC__seekable_stream_decoder_get_decode_position(x,y)
 #  define flac_get_state(x)      FLAC__seekable_stream_decoder_get_state(x)
@@ -78,18 +80,26 @@
 #    include <OggFLAC/seekable_stream_decoder.h>
 #  endif
 #else /* FLAC_API_VERSION_CURRENT >= 7 */
-   /* OggFLAC support is handled by our flac_plugin already */
-#  ifdef HAVE_OGGFLAC
-#    undef HAVE_OGGFLAC
+
+   /* OggFLAC support is handled by our flac_plugin already, and
+    * thus we *can* always have it if libFLAC was compiled with it */
+#  ifndef HAVE_OGGFLAC
+#    define HAVE_OGGFLAC 1
 #  endif
-#  include <FLAC/stream_decoder.h>
 #  include "_ogg_common.h"
+#  undef HAVE_OGGFLAC /* we don't need this defined anymore */
+
+#  include <FLAC/stream_decoder.h>
 #  define flac_decoder           FLAC__StreamDecoder
 #  define flac_new(x)            FLAC__stream_decoder_new(x)
 
 #  define flac_init(a,b,c,d,e,f,g,h,i,j) \
         (FLAC__stream_decoder_init_stream(a,b,c,d,e,f,g,h,i,j) \
          == FLAC__STREAM_DECODER_INIT_STATUS_OK)
+#  define flac_ogg_init(a,b,c,d,e,f,g,h,i,j) \
+        (FLAC__stream_decoder_init_ogg_stream(a,b,c,d,e,f,g,h,i,j) \
+         == FLAC__STREAM_DECODER_INIT_STATUS_OK)
+
 #  define flac_get_decode_position(x,y) \
                  FLAC__stream_decoder_get_decode_position(x,y)
 #  define flac_get_state(x)      FLAC__stream_decoder_get_state(x)
diff --git a/src/inputPlugins/flac_plugin.c b/src/inputPlugins/flac_plugin.c
index 0b0625417..ee8e61be6 100644
--- a/src/inputPlugins/flac_plugin.c
+++ b/src/inputPlugins/flac_plugin.c
@@ -31,6 +31,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <assert.h>
 
 /* this code was based on flac123, from flac-tools */
 
@@ -339,30 +340,34 @@ static MpdTag *flacTagDup(char *file)
 	return ret;
 }
 
-static int flac_decode(OutputBuffer * cb, DecoderControl * dc,
-		       InputStream * inStream)
+static int flac_decode_internal(OutputBuffer * cb, DecoderControl * dc,
+                               InputStream * inStream, int is_ogg)
 {
 	flac_decoder *flacDec;
 	FlacData data;
-	int ret = 0;
+	const char *err = NULL;
 
 	if (!(flacDec = flac_new()))
 		return -1;
 	init_FlacData(&data, cb, dc, inStream);
-	if (!flac_init(flacDec, flacRead, flacSeek, flacTell, flacLength,
-	               flacEOF, flacWrite, flacMetadata, flacError,
-		       (void *)&data)) {
-		ERROR("flac problem doing init()\n");
-		flacPrintErroredState(flac_get_state(flacDec));
-		ret = -1;
-		goto fail;
-	}
-
-	if (!flac_process_metadata(flacDec)) {
-		ERROR("flac problem reading metadata\n");
-		flacPrintErroredState(flac_get_state(flacDec));
-		ret = -1;
-		goto fail;
+	if (is_ogg) {
+		if (!flac_ogg_init(flacDec, flacRead, flacSeek, flacTell,
+		                   flacLength, flacEOF, flacWrite, flacMetadata,
+			           flacError, (void *)&data)) {
+			err = "doing Ogg init()";
+			goto fail;
+		}
+	} else {
+		if (!flac_init(flacDec, flacRead, flacSeek, flacTell,
+		               flacLength, flacEOF, flacWrite, flacMetadata,
+			       flacError, (void *)&data)) {
+			err = "doing init()";
+			goto fail;
+		}
+		if (!flac_process_metadata(flacDec)) {
+			err = "problem reading metadata";
+			goto fail;
+		}
 	}
 
 	dc->state = DECODE_STATE_DECODE;
@@ -412,15 +417,97 @@ fail:
 
 	closeInputStream(inStream);
 
+	if (err) {
+		ERROR("flac %s\n", err);
+		return -1;
+	}
+	return 0;
+}
+
+static int flac_decode(OutputBuffer * cb, DecoderControl * dc,
+                       InputStream * inStream)
+{
+	return flac_decode_internal(cb, dc, inStream, 0);
+}
+
+#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT <= 7
+#  define flac_plugin_init NULL
+#else /* FLAC_API_VERSION_CURRENT >= 7 */
+/* some of this stuff is duplicated from oggflac_plugin.c */
+extern InputPlugin oggflacPlugin;
+
+static MpdTag *oggflac_tag_dup(char *file)
+{
+	MpdTag *ret = NULL;
+	FLAC__Metadata_Iterator *it;
+	FLAC__StreamMetadata *block;
+	FLAC__Metadata_Chain *chain = FLAC__metadata_chain_new();
+
+	if (!(FLAC__metadata_chain_read_ogg(chain, file)))
+		goto out;
+	it = FLAC__metadata_iterator_new();
+	FLAC__metadata_iterator_init(it, chain);
+	do {
+		if (!(block = FLAC__metadata_iterator_get_block(it)))
+			break;
+		if (block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
+			ret = copyVorbisCommentBlockToMpdTag(block, ret);
+		} else if (block->type == FLAC__METADATA_TYPE_STREAMINFO) {
+			if (!ret)
+				ret = newMpdTag();
+			ret->time = ((float)block->data.stream_info.
+				     total_samples) /
+			    block->data.stream_info.sample_rate + 0.5;
+		}
+	} while (FLAC__metadata_iterator_next(it));
+	FLAC__metadata_iterator_delete(it);
+out:
+	FLAC__metadata_chain_delete(chain);
 	return ret;
 }
 
+static int oggflac_decode(OutputBuffer * cb, DecoderControl * dc,
+		          InputStream * inStream)
+{
+	return flac_decode_internal(cb, dc, inStream, 1);
+}
+
+static unsigned int oggflac_try_decode(InputStream * inStream)
+{
+	return (ogg_stream_type_detect(inStream) == FLAC) ? 1 : 0;
+}
+
+static char *oggflac_suffixes[] = { "ogg", NULL };
+static char *oggflac_mime_types[] = { "application/ogg", NULL };
+
+static int flac_plugin_init(void)
+{
+	if (!FLAC_API_SUPPORTS_OGG_FLAC) {
+		DEBUG("libFLAC does not support OggFLAC\n");
+		return 1;
+	}
+	DEBUG("libFLAC supports OggFLAC, initializing OggFLAC support\n");
+	assert(oggflacPlugin.name == NULL);
+	oggflacPlugin.name = "oggflac";
+	oggflacPlugin.tryDecodeFunc = oggflac_try_decode;
+	oggflacPlugin.streamDecodeFunc = oggflac_decode;
+	oggflacPlugin.tagDupFunc = oggflac_tag_dup;
+	oggflacPlugin.streamTypes = INPUT_PLUGIN_STREAM_URL |
+	                            INPUT_PLUGIN_STREAM_FILE;
+	oggflacPlugin.suffixes = oggflac_suffixes;
+	oggflacPlugin.mimeTypes = oggflac_mime_types;
+	loadInputPlugin(&oggflacPlugin);
+	return 1;
+}
+
+#endif /* FLAC_API_VERSION_CURRENT >= 7 */
+
 static char *flacSuffixes[] = { "flac", NULL };
 static char *flac_mime_types[] = { "application/x-flac", NULL };
 
 InputPlugin flacPlugin = {
 	"flac",
-	NULL,
+	flac_plugin_init,
 	NULL,
 	NULL,
 	flac_decode,