decoder/flac: remember audio_format, not stream_info

src/decoder/_flac_common.c

@@ -37,6 +37,7 @@ flac_data_init(struct flac_data *data, struct decoder * decoder,
 {
 	pcm_buffer_init(&data->buffer);
 
+	data->unsupported = false;
 	data->have_stream_info = false;
 	data->first_frame = 0;
 	data->next_frame = 0;
@@ -81,38 +82,53 @@ bool
 flac_data_get_audio_format(struct flac_data *data,
 			   struct audio_format *audio_format)
 {
-	GError *error = NULL;
+	if (data->unsupported)
+		return false;
 
 	if (!data->have_stream_info) {
 		g_warning("no STREAMINFO packet found");
 		return false;
 	}
 
-	data->sample_format = flac_sample_format(&data->stream_info);
+	*audio_format = data->audio_format;
+	return true;
+}
+
+static void
+flac_got_stream_info(struct flac_data *data,
+		     const FLAC__StreamMetadata_StreamInfo *stream_info)
+{
+	if (data->have_stream_info || data->unsupported)
+		return;
 
-	if (!audio_format_init_checked(audio_format,
-				       data->stream_info.sample_rate,
-				       data->sample_format,
-				       data->stream_info.channels, &error)) {
+	GError *error = NULL;
+	if (!audio_format_init_checked(&data->audio_format,
+				       stream_info->sample_rate,
+				       flac_sample_format(stream_info),
+				       stream_info->channels, &error)) {
 		g_warning("%s", error->message);
 		g_error_free(error);
-		return false;
+		data->unsupported = true;
+		return;
 	}
 
-	data->frame_size = audio_format_frame_size(audio_format);
+	data->frame_size = audio_format_frame_size(&data->audio_format);
 
-	return true;
+	data->total_frames = stream_info->total_samples;
+	data->have_stream_info = true;
 }
 
 void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
 			     struct flac_data *data)
 {
+	if (data->unsupported)
+		return;
+
 	struct replay_gain_info *rgi;
 
 	switch (block->type) {
 	case FLAC__METADATA_TYPE_STREAMINFO:
-		data->stream_info = block->data.stream_info;
-		data->have_stream_info = true;
+		flac_got_stream_info(data, &block->data.stream_info);
 		break;
 
 	case FLAC__METADATA_TYPE_VORBIS_COMMENT:
@@ -166,7 +182,7 @@ flac_common_write(struct flac_data *data, const FLAC__Frame * frame,
 	buffer = pcm_buffer_get(&data->buffer, buffer_size);
 
 	flac_convert(buffer, frame->header.channels,
-		     data->sample_format, buf,
+		     data->audio_format.format, buf,
 		     0, frame->header.blocksize);
 
 	if (nbytes > 0)

src/decoder/_flac_common.h

@@ -38,8 +38,6 @@
 struct flac_data {
 	struct pcm_buffer buffer;
 
-	enum sample_format sample_format;
-
 	/**
 	 * The size of one frame in the output buffer.
 	 */
@@ -51,12 +49,20 @@ struct flac_data {
 	bool have_stream_info;
 
 	/**
-	 * A copy of the stream info object passed to the metadata
-	 * callback.  Once we drop support for libFLAC 1.1.2, we can
-	 * remove this attribute, and use
-	 * FLAC__stream_decoder_get_total_samples() etc.
+	 * Does the FLAC file contain an unsupported audio format?
+	 */
+	bool unsupported;
+
+	/**
+	 * The validated audio format of the FLAC file.  This
+	 * attribute is defined if "have_stream_info" is true.
+	 */
+	struct audio_format audio_format;
+
+	/**
+	 * The total number of frames in this song.
 	 */
-	FLAC__StreamMetadata_StreamInfo stream_info;
+	FLAC__uint64 total_frames;
 
 	/**
 	 * The number of the first frame in this song.  This is only

src/decoder/flac_decoder_plugin.c

@@ -251,12 +251,12 @@ flac_decoder_initialize(struct flac_data *data, FLAC__StreamDecoder *sd,
 		return false;
 
 	if (duration == 0)
-		duration = data->stream_info.total_samples;
+		duration = data->total_frames;
 
 	decoder_initialized(data->decoder, &audio_format,
 			    seekable,
 			    (float)duration /
-			    (float)data->stream_info.sample_rate);
+			    (float)data->audio_format.sample_rate);
 	return true;
 }
 
@@ -281,7 +281,7 @@ flac_decoder_loop(struct flac_data *data, FLAC__StreamDecoder *flac_dec,
 		if (cmd == DECODE_COMMAND_SEEK) {
 			FLAC__uint64 seek_sample = t_start +
 				decoder_seek_where(decoder) *
-				data->stream_info.sample_rate;
+				data->audio_format.sample_rate;
 			if (seek_sample >= t_start &&
 			    (t_end == 0 || seek_sample <= t_end) &&
 			    FLAC__stream_decoder_seek_absolute(flac_dec, seek_sample)) {

src/decoder/oggflac_decoder_plugin.c

@@ -302,8 +302,8 @@ oggflac_decode(struct decoder * mpd_decoder, struct input_stream *input_stream)
 
 	decoder_initialized(mpd_decoder, &audio_format,
 			    input_stream->seekable,
-			    (float)data.stream_info.total_samples /
-			    (float)data.stream_info.sample_rate);
+			    (float)data.total_frames /
+			    (float)data.audio_format.sample_rate);
 
 	while (true) {
 		OggFLAC__seekable_stream_decoder_process_single(decoder);
@@ -313,7 +313,7 @@ oggflac_decode(struct decoder * mpd_decoder, struct input_stream *input_stream)
 		}
 		if (decoder_get_command(mpd_decoder) == DECODE_COMMAND_SEEK) {
 			FLAC__uint64 seek_sample = decoder_seek_where(mpd_decoder) *
-			    data.stream_info.sample_rate;
+			    data.audio_format.sample_rate;
 			if (OggFLAC__seekable_stream_decoder_seek_absolute
 			    (decoder, seek_sample)) {
 				data.next_frame = seek_sample;