MusicChunk: move functions to methods

src/DecoderAPI.cxx

@@ -429,10 +429,10 @@ decoder_data(struct decoder *decoder,
 			return dc->command;
 		}
 
-		void *dest = music_chunk_write(chunk, &dc->out_audio_format,
-					       decoder->timestamp -
-					       dc->song->start_ms / 1000.0,
-					       kbit_rate, &nbytes);
+		void *dest = chunk->Write(dc->out_audio_format,
+					  decoder->timestamp -
+					  dc->song->start_ms / 1000.0,
+					  kbit_rate, &nbytes);
 		if (dest == NULL) {
 			/* the chunk is full, flush it */
 			decoder_flush_chunk(decoder);
@@ -451,7 +451,7 @@ decoder_data(struct decoder *decoder,
 
 		/* expand the music pipe chunk */
 
-		full = music_chunk_expand(chunk, &dc->out_audio_format, nbytes);
+		full = chunk->Expand(dc->out_audio_format, nbytes);
 		if (full) {
 			/* the chunk is full, flush it */
 			decoder_flush_chunk(decoder);

src/DecoderInternal.cxx

@@ -88,7 +88,7 @@ decoder_flush_chunk(struct decoder *decoder)
 	assert(decoder != NULL);
 	assert(decoder->chunk != NULL);
 
-	if (music_chunk_is_empty(decoder->chunk))
+	if (decoder->chunk->IsEmpty())
 		music_buffer_return(dc->buffer, decoder->chunk);
 	else
 		music_pipe_push(dc->pipe, decoder->chunk);

src/MusicChunk.cxx

@@ -27,79 +27,61 @@ extern "C" {
 
 #include <assert.h>
 
-void
-music_chunk_init(struct music_chunk *chunk)
+music_chunk::~music_chunk()
 {
-	chunk->other = NULL;
-	chunk->length = 0;
-	chunk->tag = NULL;
-	chunk->replay_gain_serial = 0;
-}
-
-void
-music_chunk_free(struct music_chunk *chunk)
-{
-	if (chunk->tag != NULL)
-		tag_free(chunk->tag);
+	if (tag != NULL)
+		tag_free(tag);
 }
 
 #ifndef NDEBUG
 bool
-music_chunk_check_format(const struct music_chunk *chunk,
-			 const struct audio_format *audio_format)
+music_chunk::CheckFormat(const struct audio_format &other_format) const
 {
-	assert(chunk != NULL);
-	assert(audio_format != NULL);
-	assert(audio_format_valid(audio_format));
+	assert(audio_format_valid(&other_format));
 
-	return chunk->length == 0 ||
-		audio_format_equals(&chunk->audio_format, audio_format);
+	return length == 0 ||
+		audio_format_equals(&audio_format, &other_format);
 }
 #endif
 
 void *
-music_chunk_write(struct music_chunk *chunk,
-		  const struct audio_format *audio_format,
-		  float data_time, uint16_t bit_rate,
-		  size_t *max_length_r)
+music_chunk::Write(const struct audio_format &af,
+		   float data_time, uint16_t _bit_rate,
+		   size_t *max_length_r)
 {
-	const size_t frame_size = audio_format_frame_size(audio_format);
-	size_t num_frames;
+	assert(CheckFormat(af));
+	assert(length == 0 || audio_format_valid(&audio_format));
 
-	assert(music_chunk_check_format(chunk, audio_format));
-	assert(chunk->length == 0 || audio_format_valid(&chunk->audio_format));
-
-	if (chunk->length == 0) {
+	if (length == 0) {
 		/* if the chunk is empty, nobody has set bitRate and
 		   times yet */
 
-		chunk->bit_rate = bit_rate;
-		chunk->times = data_time;
+		bit_rate = _bit_rate;
+		times = data_time;
 	}
 
-	num_frames = (sizeof(chunk->data) - chunk->length) / frame_size;
+	const size_t frame_size = audio_format_frame_size(&af);
+	size_t num_frames = (sizeof(data) - length) / frame_size;
 	if (num_frames == 0)
 		return NULL;
 
 #ifndef NDEBUG
-	chunk->audio_format = *audio_format;
+	audio_format = af;
 #endif
 
 	*max_length_r = num_frames * frame_size;
-	return chunk->data + chunk->length;
+	return data + length;
 }
 
 bool
-music_chunk_expand(struct music_chunk *chunk,
-		   const struct audio_format *audio_format, size_t length)
+music_chunk::Expand(const struct audio_format &af, size_t _length)
 {
-	const size_t frame_size = audio_format_frame_size(audio_format);
+	const size_t frame_size = audio_format_frame_size(&af);
 
-	assert(chunk != NULL);
-	assert(chunk->length + length <= sizeof(chunk->data));
-	assert(audio_format_equals(&chunk->audio_format, audio_format));
+	assert(length + _length <= sizeof(data));
+	assert(audio_format_equals(&audio_format, &af));
 
-	chunk->length += length;
+	length += _length;
 
-	return chunk->length + frame_size > sizeof(chunk->data);
+	return length + frame_size > sizeof(data);
 }

src/MusicChunk.hxx

@@ -91,6 +91,57 @@ struct music_chunk {
 #ifndef NDEBUG
 	struct audio_format audio_format;
 #endif
+
+	music_chunk()
+		:other(nullptr),
+		 length(0),
+		 tag(nullptr),
+		 replay_gain_serial(0) {}
+
+	~music_chunk();
+
+	bool IsEmpty() const {
+		return length == 0 && tag == nullptr;
+	}
+
+#ifndef NDEBUG
+	/**
+	 * Checks if the audio format if the chunk is equal to the
+	 * specified audio_format.
+	 */
+	gcc_pure
+	bool CheckFormat(const struct audio_format &audio_format) const;
+#endif
+
+	/**
+	 * Prepares appending to the music chunk.  Returns a buffer
+	 * where you may write into.  After you are finished, call
+	 * music_chunk_expand().
+	 *
+	 * @param chunk the music_chunk object
+	 * @param audio_format the audio format for the appended data;
+	 * must stay the same for the life cycle of this chunk
+	 * @param data_time the time within the song
+	 * @param bit_rate the current bit rate of the source file
+	 * @param max_length_r the maximum write length is returned
+	 * here
+	 * @return a writable buffer, or NULL if the chunk is full
+	 */
+	void *Write(const struct audio_format &af,
+		    float data_time, uint16_t bit_rate,
+		    size_t *max_length_r);
+
+	/**
+	 * Increases the length of the chunk after the caller has written to
+	 * the buffer returned by music_chunk_write().
+	 *
+	 * @param chunk the music_chunk object
+	 * @param audio_format the audio format for the appended data; must
+	 * stay the same for the life cycle of this chunk
+	 * @param length the number of bytes which were appended
+	 * @return true if the chunk is full
+	 */
+	bool Expand(const struct audio_format &af, size_t length);
 };
 
 void
@@ -99,52 +150,4 @@ music_chunk_init(struct music_chunk *chunk);
 void
 music_chunk_free(struct music_chunk *chunk);
 
-static inline bool
-music_chunk_is_empty(const struct music_chunk *chunk)
-{
-	return chunk->length == 0 && chunk->tag == NULL;
-}
-
-#ifndef NDEBUG
-/**
- * Checks if the audio format if the chunk is equal to the specified
- * audio_format.
- */
-bool
-music_chunk_check_format(const struct music_chunk *chunk,
-			 const struct audio_format *audio_format);
-#endif
-
-/**
- * Prepares appending to the music chunk.  Returns a buffer where you
- * may write into.  After you are finished, call music_chunk_expand().
- *
- * @param chunk the music_chunk object
- * @param audio_format the audio format for the appended data; must
- * stay the same for the life cycle of this chunk
- * @param data_time the time within the song
- * @param bit_rate the current bit rate of the source file
- * @param max_length_r the maximum write length is returned here
- * @return a writable buffer, or NULL if the chunk is full
- */
-void *
-music_chunk_write(struct music_chunk *chunk,
-		  const struct audio_format *audio_format,
-		  float data_time, uint16_t bit_rate,
-		  size_t *max_length_r);
-
-/**
- * Increases the length of the chunk after the caller has written to
- * the buffer returned by music_chunk_write().
- *
- * @param chunk the music_chunk object
- * @param audio_format the audio format for the appended data; must
- * stay the same for the life cycle of this chunk
- * @param length the number of bytes which were appended
- * @return true if the chunk is full
- */
-bool
-music_chunk_expand(struct music_chunk *chunk,
-		   const struct audio_format *audio_format, size_t length);
-
 #endif

src/MusicPipe.cxx

@@ -111,7 +111,7 @@ music_pipe_shift(struct music_pipe *mp)
 
 	struct music_chunk *chunk = mp->head;
 	if (chunk != NULL) {
-		assert(!music_chunk_is_empty(chunk));
+		assert(!chunk->IsEmpty());
 
 		mp->head = chunk->next;
 		--mp->size;
@@ -150,14 +150,14 @@ music_pipe_clear(struct music_pipe *mp, struct music_buffer *buffer)
 void
 music_pipe_push(struct music_pipe *mp, struct music_chunk *chunk)
 {
-	assert(!music_chunk_is_empty(chunk));
+	assert(!chunk->IsEmpty());
 	assert(chunk->length == 0 || audio_format_valid(&chunk->audio_format));
 
 	const ScopeLock protect(mp->mutex);
 
 	assert(mp->size > 0 || !audio_format_defined(&mp->audio_format));
 	assert(!audio_format_defined(&mp->audio_format) ||
-	       music_chunk_check_format(chunk, &mp->audio_format));
+	       chunk->CheckFormat(mp->audio_format));
 
 #ifndef NDEBUG
 	if (!audio_format_defined(&mp->audio_format) && chunk->length > 0)

src/OutputAll.cxx

@@ -282,7 +282,7 @@ audio_output_all_play(struct music_chunk *chunk, GError **error_r)
 	assert(g_music_buffer != NULL);
 	assert(g_mp != NULL);
 	assert(chunk != NULL);
-	assert(music_chunk_check_format(chunk, &input_audio_format));
+	assert(chunk->CheckFormat(input_audio_format));
 
 	ret = audio_output_all_update();
 	if (!ret) {

src/OutputThread.cxx

@@ -327,8 +327,8 @@ ao_chunk_data(struct audio_output *ao, const struct music_chunk *chunk,
 	      size_t *length_r)
 {
 	assert(chunk != NULL);
-	assert(!music_chunk_is_empty(chunk));
-	assert(music_chunk_check_format(chunk, &ao->in_audio_format));
+	assert(!chunk->IsEmpty());
+	assert(chunk->CheckFormat(ao->in_audio_format));
 
 	const void *data = chunk->data;
 	size_t length = chunk->length;

src/PlayerThread.cxx

@@ -686,7 +686,7 @@ play_chunk(struct player_control *pc,
 	   const struct audio_format *format,
 	   GError **error_r)
 {
-	assert(music_chunk_check_format(chunk, format));
+	assert(chunk->CheckFormat(*format));
 
 	if (chunk->tag != NULL)
 		update_song_tag(song, chunk->tag);
@@ -766,7 +766,7 @@ play_next_chunk(struct player *player)
 				chunk->mix_ratio = nan("");
 			}
 
-			if (music_chunk_is_empty(other_chunk)) {
+			if (other_chunk->IsEmpty()) {
 				/* the "other" chunk was a music_chunk
 				   which had only a tag, but no music
 				   data - we cannot cross-fade that;