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author | Max Kellermann <max@duempel.org> | 2012-03-21 19:54:35 +0100 |
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committer | Max Kellermann <max@duempel.org> | 2012-03-21 21:16:50 +0100 |
commit | 170635e3a6fbbdb2274f6ecd164c2c363d4e80b4 (patch) | |
tree | 1065b6a3651ff07416835f1bdc42a32f9befe87a /src/pcm_export.h | |
parent | a5d1444ef480952c73b429d43aadb943925e5aa1 (diff) | |
download | mpd-170635e3a6fbbdb2274f6ecd164c2c363d4e80b4.tar.gz mpd-170635e3a6fbbdb2274f6ecd164c2c363d4e80b4.tar.xz mpd-170635e3a6fbbdb2274f6ecd164c2c363d4e80b4.zip |
output/{alsa,oss}: move endian code to new library pcm_export
Diffstat (limited to '')
-rw-r--r-- | src/pcm_export.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/pcm_export.h b/src/pcm_export.h new file mode 100644 index 000000000..198b1d6a8 --- /dev/null +++ b/src/pcm_export.h @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2003-2012 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 PCM_EXPORT_H +#define PCM_EXPORT_H + +#include "check.h" +#include "pcm_buffer.h" +#include "audio_format.h" + +#include <stdbool.h> + +struct audio_format; + +/** + * An object that handles export of PCM samples to some instance + * outside of MPD. It has a few more options to tweak the binary + * representation which are not supported by the pcm_convert library. + */ +struct pcm_export_state { + /** + * The buffer used to reverse the byte order. + * + * @see #reverse_endian + */ + struct pcm_buffer reverse_buffer; + + enum sample_format sample_format; + + /** + * Export the samples in reverse byte order? + */ + bool reverse_endian; +}; + +/** + * Initialize a #pcm_export_state object. + */ +void +pcm_export_init(struct pcm_export_state *state); + +/** + * Deinitialize a #pcm_export_state object and free allocated memory. + */ +void +pcm_export_deinit(struct pcm_export_state *state); + +/** + * Open the #pcm_export_state object. + * + * There is no "close" method. This function may be called multiple + * times to reuse the object, until pcm_export_deinit() is called. + * + * This function cannot fail. + */ +void +pcm_export_open(struct pcm_export_state *state, + enum sample_format sample_format, + bool reverse_endian); + +/** + * Export a PCM buffer. + * + * @param state an initialized and open pcm_export_state object + * @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 (may be a pointer to the source buffer) + */ +const void * +pcm_export(struct pcm_export_state *state, const void *src, size_t src_size, + size_t *dest_size_r); + +#endif |