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#ifndef fooresamplerhfoo
#define fooresamplerhfoo
/***
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 2.1 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, see <http://www.gnu.org/licenses/>.
***/
#include <pulse/sample.h>
#include <pulse/channelmap.h>
#include <pulsecore/memblock.h>
#include <pulsecore/memchunk.h>
#include <pulsecore/sconv.h>
#include <pulsecore/remap.h>
typedef struct pa_resampler pa_resampler;
typedef struct pa_resampler_impl pa_resampler_impl;
struct pa_resampler_impl {
void (*free)(pa_resampler *r);
void (*update_rates)(pa_resampler *r);
/* Returns the number of leftover frames in the input buffer. */
unsigned (*resample)(pa_resampler *r, const pa_memchunk *in, unsigned in_n_frames, pa_memchunk *out, unsigned *out_n_frames);
void (*reset)(pa_resampler *r);
void *data;
};
typedef enum pa_resample_method {
PA_RESAMPLER_INVALID = -1,
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_SOXR_MQ,
PA_RESAMPLER_SOXR_HQ,
PA_RESAMPLER_SOXR_VHQ,
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;
struct pa_resampler {
pa_resample_method_t method;
pa_resample_flags_t flags;
pa_sample_spec i_ss, o_ss;
pa_channel_map i_cm, o_cm;
size_t i_fz, o_fz, w_fz, w_sz;
pa_mempool *mempool;
pa_memchunk to_work_format_buf;
pa_memchunk remap_buf;
pa_memchunk resample_buf;
pa_memchunk from_work_format_buf;
size_t to_work_format_buf_size;
size_t remap_buf_size;
size_t resample_buf_size;
size_t from_work_format_buf_size;
/* points to buffer before resampling stage, remap or to_work */
pa_memchunk *leftover_buf;
size_t *leftover_buf_size;
/* have_leftover points to leftover_in_remap or leftover_in_to_work */
bool *have_leftover;
bool leftover_in_remap;
bool leftover_in_to_work;
pa_sample_format_t work_format;
uint8_t work_channels;
pa_convert_func_t to_work_format_func;
pa_convert_func_t from_work_format_func;
pa_remap_t remap;
bool map_required;
pa_resampler_impl impl;
};
pa_resampler* pa_resampler_new(
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);
/* Try to parse the resampler method */
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);
/* Implementation specific init functions */
int pa_resampler_ffmpeg_init(pa_resampler *r);
int pa_resampler_libsamplerate_init(pa_resampler *r);
int pa_resampler_peaks_init(pa_resampler *r);
int pa_resampler_speex_init(pa_resampler *r);
int pa_resampler_trivial_init(pa_resampler*r);
int pa_resampler_soxr_init(pa_resampler *r);
/* Resampler-specific quirks */
bool pa_speex_is_fixed_point(void);
#endif
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