diff options
Diffstat (limited to 'src/crossfade.h')
| -rw-r--r-- | src/crossfade.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/crossfade.h b/src/crossfade.h index 31495f806..8d6706b99 100644 --- a/src/crossfade.h +++ b/src/crossfade.h @@ -23,11 +23,32 @@ struct audio_format; struct music_chunk; +/** + * Calculate how many music pipe chunks should be used for crossfading. + * + * @param duration the requested crossfade duration + * @param total_time total_time the duration of the new song + * @param af the audio format of the new song + * @param old_format the audio format of the current song + * @param max_chunks the maximum number of chunks + * @return the number of chunks for crossfading, or 0 if cross fading + * should be disabled for this song change + */ unsigned cross_fade_calc(float duration, float total_time, const struct audio_format *af, const struct audio_format *old_format, unsigned max_chunks); +/* + * Applies cross fading to two chunks, i.e. mixes these chunks. + * Internally, this calls pcm_mix(). + * + * @param a the chunk in the current song (and the destination chunk) + * @param b the according chunk in the new song + * @param format the audio format of both chunks (must be the same) + * @param current_chunk the relative index of the current chunk + * @param num_chunks the number of chunks used for cross fading + */ void cross_fade_apply(struct music_chunk *a, const struct music_chunk *b, const struct audio_format *format, unsigned int current_chunk, unsigned int num_chunks); |