diff options
Diffstat (limited to '')
-rw-r--r-- | src/PcmConvert.hxx | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/PcmConvert.hxx b/src/PcmConvert.hxx new file mode 100644 index 000000000..f08188a9c --- /dev/null +++ b/src/PcmConvert.hxx @@ -0,0 +1,115 @@ +/* + * 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 PCM_CONVERT_HXX +#define PCM_CONVERT_HXX + +#include "PcmDither.hxx" + +extern "C" { +#include "pcm_dsd.h" +#include "pcm_resample.h" +#include "pcm_buffer.h" +} + +#include <glib.h> + +struct audio_format; + +/** + * This object is statically allocated (within another struct), and + * holds buffer allocations and the state for all kinds of PCM + * conversions. + */ +class PcmConvert { + struct pcm_dsd dsd; + + struct pcm_resample_state resample; + + PcmDither dither; + + /** the buffer for converting the sample format */ + struct pcm_buffer format_buffer; + + /** the buffer for converting the channel count */ + struct pcm_buffer channels_buffer; + +public: + PcmConvert(); + ~PcmConvert(); + + + /** + * Reset the pcm_convert_state object. Use this at the + * boundary between two distinct songs and each time the + * format changes. + */ + void Reset(); + + /** + * Converts PCM data between two audio formats. + * + * @param src_format the source audio format + * @param src the source PCM buffer + * @param src_size the size of #src in bytes + * @param dest_format the requested destination audio format + * @param dest_size_r returns the number of bytes of the destination buffer + * @param error_r location to store the error occurring, or NULL to + * ignore errors + * @return the destination buffer, or NULL on error + */ + const void *Convert(const audio_format *src_format, + const void *src, size_t src_size, + const audio_format *dest_format, + size_t *dest_size_r, + GError **error_r); + +private: + const int16_t *Convert16(const audio_format *src_format, + const void *src_buffer, size_t src_size, + const audio_format *dest_format, + size_t *dest_size_r, + GError **error_r); + + const int32_t *Convert24(const audio_format *src_format, + const void *src_buffer, size_t src_size, + const audio_format *dest_format, + size_t *dest_size_r, + GError **error_r); + + const int32_t *Convert32(const audio_format *src_format, + const void *src_buffer, size_t src_size, + const audio_format *dest_format, + size_t *dest_size_r, + GError **error_r); + + const float *ConvertFloat(const audio_format *src_format, + const void *src_buffer, size_t src_size, + const audio_format *dest_format, + size_t *dest_size_r, + GError **error_r); +}; + +static inline GQuark +pcm_convert_quark(void) +{ + return g_quark_from_static_string("pcm_convert"); +} + +#endif |