diff options
Diffstat (limited to 'src/pulsecore/resampler.h')
| -rw-r--r-- | src/pulsecore/resampler.h | 72 |
1 files changed, 53 insertions, 19 deletions
diff --git a/src/pulsecore/resampler.h b/src/pulsecore/resampler.h index c1199e5c..742de6af 100644 --- a/src/pulsecore/resampler.h +++ b/src/pulsecore/resampler.h @@ -1,29 +1,27 @@ #ifndef fooresamplerhfoo #define fooresamplerhfoo -/* $Id$ */ - /*** This file is part of PulseAudio. - + + Copyright 2004-2006 Lennart Poettering + PulseAudio is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published - by the Free Software Foundation; either version 2 of the License, + by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. - + PulseAudio 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 Lesser General Public License along with PulseAudio; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. ***/ -#include <samplerate.h> - #include <pulse/sample.h> #include <pulse/channelmap.h> #include <pulsecore/memblock.h> @@ -33,34 +31,62 @@ typedef struct pa_resampler pa_resampler; typedef enum pa_resample_method { PA_RESAMPLER_INVALID = -1, - PA_RESAMPLER_SRC_SINC_BEST_QUALITY = SRC_SINC_BEST_QUALITY, - PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY = SRC_SINC_MEDIUM_QUALITY, - PA_RESAMPLER_SRC_SINC_FASTEST = SRC_SINC_FASTEST, - PA_RESAMPLER_SRC_ZERO_ORDER_HOLD = SRC_ZERO_ORDER_HOLD, - PA_RESAMPLER_SRC_LINEAR = SRC_LINEAR, + PA_RESAMPLER_SRC_SINC_BEST_QUALITY = 0, /* = SRC_SINC_BEST_QUALITY */ + PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY = 1, /* = SRC_SINC_MEDIUM_QUALITY */ + PA_RESAMPLER_SRC_SINC_FASTEST = 2, /* = SRC_SINC_FASTEST */ + PA_RESAMPLER_SRC_ZERO_ORDER_HOLD = 3, /* = SRC_ZERO_ORDER_HOLD */ + PA_RESAMPLER_SRC_LINEAR = 4, /* = SRC_LINEAR */ PA_RESAMPLER_TRIVIAL, + PA_RESAMPLER_SPEEX_FLOAT_BASE, + PA_RESAMPLER_SPEEX_FLOAT_MAX = PA_RESAMPLER_SPEEX_FLOAT_BASE + 10, + PA_RESAMPLER_SPEEX_FIXED_BASE, + PA_RESAMPLER_SPEEX_FIXED_MAX = PA_RESAMPLER_SPEEX_FIXED_BASE + 10, + PA_RESAMPLER_FFMPEG, + PA_RESAMPLER_AUTO, /* automatic select based on sample format */ + PA_RESAMPLER_COPY, + PA_RESAMPLER_PEAKS, PA_RESAMPLER_MAX } pa_resample_method_t; +typedef enum pa_resample_flags { + PA_RESAMPLER_VARIABLE_RATE = 0x0001U, + PA_RESAMPLER_NO_REMAP = 0x0002U, /* implies NO_REMIX */ + PA_RESAMPLER_NO_REMIX = 0x0004U, + PA_RESAMPLER_NO_LFE = 0x0008U +} pa_resample_flags_t; + pa_resampler* pa_resampler_new( - const pa_sample_spec *a, - const pa_channel_map *am, - const pa_sample_spec *b, - const pa_channel_map *bm, - pa_memblock_stat *s, - pa_resample_method_t resample_method); + pa_mempool *pool, + const pa_sample_spec *a, + const pa_channel_map *am, + const pa_sample_spec *b, + const pa_channel_map *bm, + pa_resample_method_t resample_method, + pa_resample_flags_t flags); void pa_resampler_free(pa_resampler *r); /* Returns the size of an input memory block which is required to return the specified amount of output data */ size_t pa_resampler_request(pa_resampler *r, size_t out_length); +/* Inverse of pa_resampler_request() */ +size_t pa_resampler_result(pa_resampler *r, size_t in_length); + +/* Returns the maximum size of input blocks we can process without needing bounce buffers larger than the mempool tile size. */ +size_t pa_resampler_max_block_size(pa_resampler *r); + /* Pass the specified memory chunk to the resampler and return the newly resampled data */ void pa_resampler_run(pa_resampler *r, const pa_memchunk *in, pa_memchunk *out); /* Change the input rate of the resampler object */ void pa_resampler_set_input_rate(pa_resampler *r, uint32_t rate); +/* Change the output rate of the resampler object */ +void pa_resampler_set_output_rate(pa_resampler *r, uint32_t rate); + +/* Reinitialize state of the resampler, possibly due to seeking or other discontinuities */ +void pa_resampler_reset(pa_resampler *r); + /* Return the resampling method of the resampler object */ pa_resample_method_t pa_resampler_get_method(pa_resampler *r); @@ -70,4 +96,12 @@ pa_resample_method_t pa_parse_resample_method(const char *string); /* return a human readable string for the specified resampling method. Inverse of pa_parse_resample_method() */ const char *pa_resample_method_to_string(pa_resample_method_t m); +/* Return 1 when the specified resampling method is supported */ +int pa_resample_method_supported(pa_resample_method_t m); + +const pa_channel_map* pa_resampler_input_channel_map(pa_resampler *r); +const pa_sample_spec* pa_resampler_input_sample_spec(pa_resampler *r); +const pa_channel_map* pa_resampler_output_channel_map(pa_resampler *r); +const pa_sample_spec* pa_resampler_output_sample_spec(pa_resampler *r); + #endif |