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Diffstat (limited to '')
-rw-r--r-- | src/PcmFormat.hxx | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/PcmFormat.hxx b/src/PcmFormat.hxx new file mode 100644 index 000000000..a5970b2d2 --- /dev/null +++ b/src/PcmFormat.hxx @@ -0,0 +1,93 @@ +/* + * Copyright (C) 2003-2013 The Music Player Daemon Project + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_PCM_FORMAT_HXX +#define MPD_PCM_FORMAT_HXX + +#include "audio_format.h" + +#include <stdint.h> +#include <stddef.h> + +struct pcm_buffer; +class PcmDither; + +/** + * Converts PCM samples to 16 bit. If the source format is 24 bit, + * then dithering is applied. + * + * @param buffer a pcm_buffer object + * @param dither a pcm_dither object for 24-to-16 conversion + * @param bits the number of in the source buffer + * @param src the source PCM buffer + * @param src_size the size of #src in bytes + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const int16_t * +pcm_convert_to_16(struct pcm_buffer *buffer, PcmDither &dither, + enum sample_format src_format, const void *src, + size_t src_size, size_t *dest_size_r); + +/** + * Converts PCM samples to 24 bit (32 bit alignment). + * + * @param buffer a pcm_buffer object + * @param bits the number of in the source buffer + * @param src the source PCM buffer + * @param src_size the size of #src in bytes + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const int32_t * +pcm_convert_to_24(struct pcm_buffer *buffer, + enum sample_format src_format, const void *src, + size_t src_size, size_t *dest_size_r); + +/** + * Converts PCM samples to 32 bit. + * + * @param buffer a pcm_buffer object + * @param bits the number of in the source buffer + * @param src the source PCM buffer + * @param src_size the size of #src in bytes + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const int32_t * +pcm_convert_to_32(struct pcm_buffer *buffer, + enum sample_format src_format, const void *src, + size_t src_size, size_t *dest_size_r); + +/** + * Converts PCM samples to 32 bit floating point. + * + * @param buffer a pcm_buffer object + * @param bits the number of in the source buffer + * @param src the source PCM buffer + * @param src_size the size of #src in bytes + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const float * +pcm_convert_to_float(struct pcm_buffer *buffer, + enum sample_format src_format, const void *src, + size_t src_size, size_t *dest_size_r); + +#endif |