4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #if HAVE_LIBSAMPLERATE
31 #include <samplerate.h>
34 #include <liboil/liboilfuncs.h>
35 #include <liboil/liboil.h>
37 #include <pulse/xmalloc.h>
38 #include <pulsecore/sconv.h>
39 #include <pulsecore/log.h>
40 #include <pulsecore/macro.h>
42 #include "speexwrap.h"
44 #include "ffmpeg/avcodec.h"
46 #include "resampler.h"
48 /* Number of samples of extra space we allow the resamplers to return */
49 #define EXTRA_SAMPLES 128
52 pa_resample_method_t resample_method
;
53 pa_sample_spec i_ss
, o_ss
;
54 pa_channel_map i_cm
, o_cm
;
55 size_t i_fz
, o_fz
, w_sz
;
58 pa_memchunk buf1
, buf2
, buf3
, buf4
;
59 unsigned buf1_samples
, buf2_samples
, buf3_samples
, buf4_samples
;
61 pa_sample_format_t work_format
;
63 pa_convert_func_t to_work_format_func
;
64 pa_convert_func_t from_work_format_func
;
66 int map_table
[PA_CHANNELS_MAX
][PA_CHANNELS_MAX
];
69 void (*impl_free
)(pa_resampler
*r
);
70 void (*impl_update_rates
)(pa_resampler
*r
);
71 void (*impl_resample
)(pa_resampler
*r
, const pa_memchunk
*in
, unsigned in_samples
, pa_memchunk
*out
, unsigned *out_samples
);
73 struct { /* data specific to the trivial resampler */
78 #ifdef HAVE_LIBSAMPLERATE
79 struct { /* data specific to libsamplerate */
84 struct { /* data specific to speex */
85 SpeexResamplerState
* state
;
88 struct { /* data specific to ffmpeg */
89 struct AVResampleContext
*state
;
90 pa_memchunk buf
[PA_CHANNELS_MAX
];
94 static int copy_init(pa_resampler
*r
);
95 static int trivial_init(pa_resampler
*r
);
96 static int speex_init(pa_resampler
*r
);
97 static int ffmpeg_init(pa_resampler
*r
);
98 #ifdef HAVE_LIBSAMPLERATE
99 static int libsamplerate_init(pa_resampler
*r
);
102 static void calc_map_table(pa_resampler
*r
);
104 static int (* const init_table
[])(pa_resampler
*r
) = {
105 #ifdef HAVE_LIBSAMPLERATE
106 [PA_RESAMPLER_SRC_SINC_BEST_QUALITY
] = libsamplerate_init
,
107 [PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY
] = libsamplerate_init
,
108 [PA_RESAMPLER_SRC_SINC_FASTEST
] = libsamplerate_init
,
109 [PA_RESAMPLER_SRC_ZERO_ORDER_HOLD
] = libsamplerate_init
,
110 [PA_RESAMPLER_SRC_LINEAR
] = libsamplerate_init
,
112 [PA_RESAMPLER_SRC_SINC_BEST_QUALITY
] = NULL
,
113 [PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY
] = NULL
,
114 [PA_RESAMPLER_SRC_SINC_FASTEST
] = NULL
,
115 [PA_RESAMPLER_SRC_ZERO_ORDER_HOLD
] = NULL
,
116 [PA_RESAMPLER_SRC_LINEAR
] = NULL
,
118 [PA_RESAMPLER_TRIVIAL
] = trivial_init
,
119 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+0] = speex_init
,
120 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+1] = speex_init
,
121 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+2] = speex_init
,
122 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+3] = speex_init
,
123 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+4] = speex_init
,
124 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+5] = speex_init
,
125 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+6] = speex_init
,
126 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+7] = speex_init
,
127 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+8] = speex_init
,
128 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+9] = speex_init
,
129 [PA_RESAMPLER_SPEEX_FLOAT_BASE
+10] = speex_init
,
130 [PA_RESAMPLER_SPEEX_FIXED_BASE
+0] = speex_init
,
131 [PA_RESAMPLER_SPEEX_FIXED_BASE
+1] = speex_init
,
132 [PA_RESAMPLER_SPEEX_FIXED_BASE
+2] = speex_init
,
133 [PA_RESAMPLER_SPEEX_FIXED_BASE
+3] = speex_init
,
134 [PA_RESAMPLER_SPEEX_FIXED_BASE
+4] = speex_init
,
135 [PA_RESAMPLER_SPEEX_FIXED_BASE
+5] = speex_init
,
136 [PA_RESAMPLER_SPEEX_FIXED_BASE
+6] = speex_init
,
137 [PA_RESAMPLER_SPEEX_FIXED_BASE
+7] = speex_init
,
138 [PA_RESAMPLER_SPEEX_FIXED_BASE
+8] = speex_init
,
139 [PA_RESAMPLER_SPEEX_FIXED_BASE
+9] = speex_init
,
140 [PA_RESAMPLER_SPEEX_FIXED_BASE
+10] = speex_init
,
141 [PA_RESAMPLER_FFMPEG
] = ffmpeg_init
,
142 [PA_RESAMPLER_AUTO
] = NULL
,
143 [PA_RESAMPLER_COPY
] = copy_init
146 static inline size_t sample_size(pa_sample_format_t f
) {
147 pa_sample_spec ss
= {
153 return pa_sample_size(&ss
);
156 pa_resampler
* pa_resampler_new(
158 const pa_sample_spec
*a
,
159 const pa_channel_map
*am
,
160 const pa_sample_spec
*b
,
161 const pa_channel_map
*bm
,
162 pa_resample_method_t resample_method
,
165 pa_resampler
*r
= NULL
;
170 pa_assert(pa_sample_spec_valid(a
));
171 pa_assert(pa_sample_spec_valid(b
));
172 pa_assert(resample_method
>= 0);
173 pa_assert(resample_method
< PA_RESAMPLER_MAX
);
177 if (!variable_rate
&& a
->rate
== b
->rate
) {
178 pa_log_info("Forcing resampler 'copy', because of fixed, identical sample rates.");
179 resample_method
= PA_RESAMPLER_COPY
;
182 if (!pa_resample_method_supported(resample_method
)) {
183 pa_log_warn("Support for resampler '%s' not compiled in, reverting to 'auto'.", pa_resample_method_to_string(resample_method
));
184 resample_method
= PA_RESAMPLER_AUTO
;
187 if (resample_method
== PA_RESAMPLER_FFMPEG
&& variable_rate
) {
188 pa_log_info("Resampler 'ffmpeg' cannot do variable rate, reverting to resampler 'auto'.");
189 resample_method
= PA_RESAMPLER_AUTO
;
192 if (resample_method
== PA_RESAMPLER_COPY
&& (variable_rate
|| a
->rate
!= b
->rate
)) {
193 pa_log_info("Resampler 'copy' cannot change sampling rate, reverting to resampler 'auto'.");
194 resample_method
= PA_RESAMPLER_AUTO
;
197 if (resample_method
== PA_RESAMPLER_AUTO
)
198 resample_method
= PA_RESAMPLER_SPEEX_FLOAT_BASE
+ 0;
200 r
= pa_xnew(pa_resampler
, 1);
202 r
->resample_method
= resample_method
;
205 r
->impl_update_rates
= NULL
;
206 r
->impl_resample
= NULL
;
208 /* Fill sample specs */
215 pa_channel_map_init_auto(&r
->i_cm
, r
->i_ss
.channels
, PA_CHANNEL_MAP_DEFAULT
);
220 pa_channel_map_init_auto(&r
->o_cm
, r
->o_ss
.channels
, PA_CHANNEL_MAP_DEFAULT
);
222 r
->i_fz
= pa_frame_size(a
);
223 r
->o_fz
= pa_frame_size(b
);
225 pa_memchunk_reset(&r
->buf1
);
226 pa_memchunk_reset(&r
->buf2
);
227 pa_memchunk_reset(&r
->buf3
);
228 pa_memchunk_reset(&r
->buf4
);
230 r
->buf1_samples
= r
->buf2_samples
= r
->buf3_samples
= r
->buf4_samples
= 0;
234 pa_log_info("Using resampler '%s'", pa_resample_method_to_string(resample_method
));
236 if ((resample_method
>= PA_RESAMPLER_SPEEX_FIXED_BASE
&& resample_method
<= PA_RESAMPLER_SPEEX_FIXED_MAX
) ||
237 (resample_method
== PA_RESAMPLER_FFMPEG
))
238 r
->work_format
= PA_SAMPLE_S16NE
;
239 else if (resample_method
== PA_RESAMPLER_TRIVIAL
) {
241 if (r
->map_required
|| a
->format
!= b
->format
) {
243 if (a
->format
== PA_SAMPLE_FLOAT32NE
|| a
->format
== PA_SAMPLE_FLOAT32RE
)
244 r
->work_format
= PA_SAMPLE_FLOAT32NE
;
246 r
->work_format
= PA_SAMPLE_S16NE
;
249 r
->work_format
= a
->format
;
252 r
->work_format
= PA_SAMPLE_FLOAT32NE
;
254 r
->w_sz
= sample_size(r
->work_format
);
256 if (r
->i_ss
.format
== r
->work_format
)
257 r
->to_work_format_func
= NULL
;
258 else if (r
->work_format
== PA_SAMPLE_FLOAT32NE
) {
259 if (!(r
->to_work_format_func
= pa_get_convert_to_float32ne_function(r
->i_ss
.format
)))
262 pa_assert(r
->work_format
== PA_SAMPLE_S16NE
);
263 if (!(r
->to_work_format_func
= pa_get_convert_to_s16ne_function(r
->i_ss
.format
)))
267 if (r
->o_ss
.format
== r
->work_format
)
268 r
->from_work_format_func
= NULL
;
269 else if (r
->work_format
== PA_SAMPLE_FLOAT32NE
) {
270 if (!(r
->from_work_format_func
= pa_get_convert_from_float32ne_function(r
->o_ss
.format
)))
273 pa_assert(r
->work_format
== PA_SAMPLE_S16NE
);
274 if (!(r
->from_work_format_func
= pa_get_convert_from_s16ne_function(r
->o_ss
.format
)))
278 /* initialize implementation */
279 if (init_table
[resample_method
](r
) < 0)
291 void pa_resampler_free(pa_resampler
*r
) {
297 if (r
->buf1
.memblock
)
298 pa_memblock_unref(r
->buf1
.memblock
);
299 if (r
->buf2
.memblock
)
300 pa_memblock_unref(r
->buf2
.memblock
);
301 if (r
->buf3
.memblock
)
302 pa_memblock_unref(r
->buf3
.memblock
);
303 if (r
->buf4
.memblock
)
304 pa_memblock_unref(r
->buf4
.memblock
);
309 void pa_resampler_set_input_rate(pa_resampler
*r
, uint32_t rate
) {
313 if (r
->i_ss
.rate
== rate
)
318 r
->impl_update_rates(r
);
321 void pa_resampler_set_output_rate(pa_resampler
*r
, uint32_t rate
) {
325 if (r
->o_ss
.rate
== rate
)
330 r
->impl_update_rates(r
);
333 size_t pa_resampler_request(pa_resampler
*r
, size_t out_length
) {
336 return (((out_length
/ r
->o_fz
)*r
->i_ss
.rate
)/r
->o_ss
.rate
) * r
->i_fz
;
339 size_t pa_resampler_max_block_size(pa_resampler
*r
) {
340 size_t block_size_max
;
346 block_size_max
= pa_mempool_block_size_max(r
->mempool
);
348 /* We deduce the "largest" sample spec we're using during the
351 if (r
->o_ss
.channels
> ss
.channels
)
352 ss
.channels
= r
->o_ss
.channels
;
354 /* We silently assume that the format enum is ordered by size */
355 if (r
->o_ss
.format
> ss
.format
)
356 ss
.format
= r
->o_ss
.format
;
357 if (r
->work_format
> ss
.format
)
358 ss
.format
= r
->work_format
;
360 if (r
->o_ss
.rate
> ss
.rate
)
361 ss
.rate
= r
->o_ss
.rate
;
363 fs
= pa_frame_size(&ss
);
365 return (((block_size_max
/fs
+ EXTRA_SAMPLES
)*r
->i_ss
.rate
)/ss
.rate
)*r
->i_fz
;
368 pa_resample_method_t
pa_resampler_get_method(pa_resampler
*r
) {
371 return r
->resample_method
;
374 static const char * const resample_methods
[] = {
375 "src-sinc-best-quality",
376 "src-sinc-medium-quality",
378 "src-zero-order-hold",
408 const char *pa_resample_method_to_string(pa_resample_method_t m
) {
410 if (m
< 0 || m
>= PA_RESAMPLER_MAX
)
413 return resample_methods
[m
];
416 int pa_resample_method_supported(pa_resample_method_t m
) {
418 if (m
< 0 || m
>= PA_RESAMPLER_MAX
)
421 #ifndef HAVE_LIBSAMPLERATE
422 if (m
<= PA_RESAMPLER_SRC_LINEAR
)
429 pa_resample_method_t
pa_parse_resample_method(const char *string
) {
430 pa_resample_method_t m
;
434 for (m
= 0; m
< PA_RESAMPLER_MAX
; m
++)
435 if (!strcmp(string
, resample_methods
[m
]))
438 if (!strcmp(string
, "speex-fixed"))
439 return PA_RESAMPLER_SPEEX_FIXED_BASE
+ 0;
441 if (!strcmp(string
, "speex-float"))
442 return PA_RESAMPLER_SPEEX_FLOAT_BASE
+ 0;
444 return PA_RESAMPLER_INVALID
;
447 static void calc_map_table(pa_resampler
*r
) {
452 if (!(r
->map_required
= (r
->i_ss
.channels
!= r
->o_ss
.channels
|| !pa_channel_map_equal(&r
->i_cm
, &r
->o_cm
))))
455 for (oc
= 0; oc
< r
->o_ss
.channels
; oc
++) {
458 for (ic
= 0; ic
< r
->i_ss
.channels
; ic
++) {
459 pa_channel_position_t a
, b
;
465 (a
== PA_CHANNEL_POSITION_MONO
&& b
== PA_CHANNEL_POSITION_LEFT
) ||
466 (a
== PA_CHANNEL_POSITION_MONO
&& b
== PA_CHANNEL_POSITION_RIGHT
) ||
467 (a
== PA_CHANNEL_POSITION_LEFT
&& b
== PA_CHANNEL_POSITION_MONO
) ||
468 (a
== PA_CHANNEL_POSITION_RIGHT
&& b
== PA_CHANNEL_POSITION_MONO
))
470 r
->map_table
[oc
][i
++] = ic
;
473 /* Add an end marker */
474 if (i
< PA_CHANNELS_MAX
)
475 r
->map_table
[oc
][i
] = -1;
479 static pa_memchunk
* convert_to_work_format(pa_resampler
*r
, pa_memchunk
*input
) {
485 pa_assert(input
->memblock
);
487 /* Convert the incoming sample into the work sample format and place them in buf1 */
489 if (!r
->to_work_format_func
|| !input
->length
)
492 n_samples
= (input
->length
/ r
->i_fz
) * r
->i_ss
.channels
;
495 r
->buf1
.length
= r
->w_sz
* n_samples
;
497 if (!r
->buf1
.memblock
|| r
->buf1_samples
< n_samples
) {
498 if (r
->buf1
.memblock
)
499 pa_memblock_unref(r
->buf1
.memblock
);
501 r
->buf1_samples
= n_samples
;
502 r
->buf1
.memblock
= pa_memblock_new(r
->mempool
, r
->buf1
.length
);
505 src
= (uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
;
506 dst
= (uint8_t*) pa_memblock_acquire(r
->buf1
.memblock
);
508 r
->to_work_format_func(n_samples
, src
, dst
);
510 pa_memblock_release(input
->memblock
);
511 pa_memblock_release(r
->buf1
.memblock
);
516 static pa_memchunk
*remap_channels(pa_resampler
*r
, pa_memchunk
*input
) {
517 unsigned in_n_samples
, out_n_samples
, n_frames
;
524 pa_assert(input
->memblock
);
526 /* Remap channels and place the result int buf2 */
528 if (!r
->map_required
|| !input
->length
)
531 in_n_samples
= input
->length
/ r
->w_sz
;
532 n_frames
= in_n_samples
/ r
->i_ss
.channels
;
533 out_n_samples
= n_frames
* r
->o_ss
.channels
;
536 r
->buf2
.length
= r
->w_sz
* out_n_samples
;
538 if (!r
->buf2
.memblock
|| r
->buf2_samples
< out_n_samples
) {
539 if (r
->buf2
.memblock
)
540 pa_memblock_unref(r
->buf2
.memblock
);
542 r
->buf2_samples
= out_n_samples
;
543 r
->buf2
.memblock
= pa_memblock_new(r
->mempool
, r
->buf2
.length
);
546 src
= ((uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
);
547 dst
= pa_memblock_acquire(r
->buf2
.memblock
);
549 memset(dst
, 0, r
->buf2
.length
);
551 o_skip
= r
->w_sz
* r
->o_ss
.channels
;
552 i_skip
= r
->w_sz
* r
->i_ss
.channels
;
554 switch (r
->work_format
) {
555 case PA_SAMPLE_FLOAT32NE
:
557 for (oc
= 0; oc
< r
->o_ss
.channels
; oc
++) {
559 static const float one
= 1.0;
561 for (i
= 0; i
< PA_CHANNELS_MAX
&& r
->map_table
[oc
][i
] >= 0; i
++)
563 (float*) dst
+ oc
, o_skip
,
564 (float*) dst
+ oc
, o_skip
,
565 (float*) src
+ r
->map_table
[oc
][i
], i_skip
,
572 case PA_SAMPLE_S16NE
:
574 for (oc
= 0; oc
< r
->o_ss
.channels
; oc
++) {
576 static const int16_t one
= 1;
578 for (i
= 0; i
< PA_CHANNELS_MAX
&& r
->map_table
[oc
][i
] >= 0; i
++)
580 (int16_t*) dst
+ oc
, o_skip
,
581 (int16_t*) dst
+ oc
, o_skip
,
582 (int16_t*) src
+ r
->map_table
[oc
][i
], i_skip
,
590 pa_assert_not_reached();
593 pa_memblock_release(input
->memblock
);
594 pa_memblock_release(r
->buf2
.memblock
);
596 r
->buf2
.length
= out_n_samples
* r
->w_sz
;
601 static pa_memchunk
*resample(pa_resampler
*r
, pa_memchunk
*input
) {
602 unsigned in_n_frames
, in_n_samples
;
603 unsigned out_n_frames
, out_n_samples
;
608 /* Resample the data and place the result in buf3 */
610 if (!r
->impl_resample
|| !input
->length
)
613 in_n_samples
= input
->length
/ r
->w_sz
;
614 in_n_frames
= in_n_samples
/ r
->o_ss
.channels
;
616 out_n_frames
= ((in_n_frames
*r
->o_ss
.rate
)/r
->i_ss
.rate
)+EXTRA_SAMPLES
;
617 out_n_samples
= out_n_frames
* r
->o_ss
.channels
;
620 r
->buf3
.length
= r
->w_sz
* out_n_samples
;
622 if (!r
->buf3
.memblock
|| r
->buf3_samples
< out_n_samples
) {
623 if (r
->buf3
.memblock
)
624 pa_memblock_unref(r
->buf3
.memblock
);
626 r
->buf3_samples
= out_n_samples
;
627 r
->buf3
.memblock
= pa_memblock_new(r
->mempool
, r
->buf3
.length
);
630 r
->impl_resample(r
, input
, in_n_frames
, &r
->buf3
, &out_n_frames
);
631 r
->buf3
.length
= out_n_frames
* r
->w_sz
* r
->o_ss
.channels
;
636 static pa_memchunk
*convert_from_work_format(pa_resampler
*r
, pa_memchunk
*input
) {
637 unsigned n_samples
, n_frames
;
643 /* Convert the data into the correct sample type and place the result in buf4 */
645 if (!r
->from_work_format_func
|| !input
->length
)
648 n_samples
= input
->length
/ r
->w_sz
;
649 n_frames
= n_samples
/ r
->o_ss
.channels
;
652 r
->buf4
.length
= r
->o_fz
* n_frames
;
654 if (!r
->buf4
.memblock
|| r
->buf4_samples
< n_samples
) {
655 if (r
->buf4
.memblock
)
656 pa_memblock_unref(r
->buf4
.memblock
);
658 r
->buf4_samples
= n_samples
;
659 r
->buf4
.memblock
= pa_memblock_new(r
->mempool
, r
->buf4
.length
);
662 src
= (uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
;
663 dst
= pa_memblock_acquire(r
->buf4
.memblock
);
664 r
->from_work_format_func(n_samples
, src
, dst
);
665 pa_memblock_release(input
->memblock
);
666 pa_memblock_release(r
->buf4
.memblock
);
668 r
->buf4
.length
= r
->o_fz
* n_frames
;
673 void pa_resampler_run(pa_resampler
*r
, const pa_memchunk
*in
, pa_memchunk
*out
) {
679 pa_assert(in
->length
);
680 pa_assert(in
->memblock
);
681 pa_assert(in
->length
% r
->i_fz
== 0);
683 buf
= (pa_memchunk
*) in
;
684 buf
= convert_to_work_format(r
, buf
);
685 buf
= remap_channels(r
, buf
);
686 buf
= resample(r
, buf
);
689 buf
= convert_from_work_format(r
, buf
);
693 pa_memblock_ref(buf
->memblock
);
695 pa_memchunk_reset(buf
);
697 pa_memchunk_reset(out
);
700 /*** libsamplerate based implementation ***/
702 #ifdef HAVE_LIBSAMPLERATE
703 static void libsamplerate_resample(pa_resampler
*r
, const pa_memchunk
*input
, unsigned in_n_frames
, pa_memchunk
*output
, unsigned *out_n_frames
) {
709 pa_assert(out_n_frames
);
711 memset(&data
, 0, sizeof(data
));
713 data
.data_in
= (float*) ((uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
);
714 data
.input_frames
= in_n_frames
;
716 data
.data_out
= (float*) ((uint8_t*) pa_memblock_acquire(output
->memblock
) + output
->index
);
717 data
.output_frames
= *out_n_frames
;
719 data
.src_ratio
= (double) r
->o_ss
.rate
/ r
->i_ss
.rate
;
720 data
.end_of_input
= 0;
722 pa_assert_se(src_process(r
->src
.state
, &data
) == 0);
723 pa_assert((unsigned) data
.input_frames_used
== in_n_frames
);
725 pa_memblock_release(input
->memblock
);
726 pa_memblock_release(output
->memblock
);
728 *out_n_frames
= data
.output_frames_gen
;
731 static void libsamplerate_update_rates(pa_resampler
*r
) {
734 pa_assert_se(src_set_ratio(r
->src
.state
, (double) r
->o_ss
.rate
/ r
->i_ss
.rate
) == 0);
737 static void libsamplerate_free(pa_resampler
*r
) {
741 src_delete(r
->src
.state
);
744 static int libsamplerate_init(pa_resampler
*r
) {
749 if (!(r
->src
.state
= src_new(r
->resample_method
, r
->o_ss
.channels
, &err
)))
752 r
->impl_free
= libsamplerate_free
;
753 r
->impl_update_rates
= libsamplerate_update_rates
;
754 r
->impl_resample
= libsamplerate_resample
;
760 /*** speex based implementation ***/
762 static void speex_resample_float(pa_resampler
*r
, const pa_memchunk
*input
, unsigned in_n_frames
, pa_memchunk
*output
, unsigned *out_n_frames
) {
764 uint32_t inf
= in_n_frames
, outf
= *out_n_frames
;
769 pa_assert(out_n_frames
);
771 in
= (float*) ((uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
);
772 out
= (float*) ((uint8_t*) pa_memblock_acquire(output
->memblock
) + output
->index
);
774 pa_assert_se(paspfl_resampler_process_interleaved_float(r
->speex
.state
, in
, &inf
, out
, &outf
) == 0);
776 pa_memblock_release(input
->memblock
);
777 pa_memblock_release(output
->memblock
);
779 pa_assert(inf
== in_n_frames
);
780 *out_n_frames
= outf
;
783 static void speex_resample_int(pa_resampler
*r
, const pa_memchunk
*input
, unsigned in_n_frames
, pa_memchunk
*output
, unsigned *out_n_frames
) {
785 uint32_t inf
= in_n_frames
, outf
= *out_n_frames
;
790 pa_assert(out_n_frames
);
792 in
= (int16_t*) ((uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
);
793 out
= (int16_t*) ((uint8_t*) pa_memblock_acquire(output
->memblock
) + output
->index
);
795 pa_assert_se(paspfx_resampler_process_interleaved_int(r
->speex
.state
, in
, &inf
, out
, &outf
) == 0);
797 pa_memblock_release(input
->memblock
);
798 pa_memblock_release(output
->memblock
);
800 pa_assert(inf
== in_n_frames
);
801 *out_n_frames
= outf
;
804 static void speex_update_rates(pa_resampler
*r
) {
807 if (r
->resample_method
>= PA_RESAMPLER_SPEEX_FIXED_BASE
&& r
->resample_method
<= PA_RESAMPLER_SPEEX_FIXED_MAX
)
808 pa_assert_se(paspfx_resampler_set_rate(r
->speex
.state
, r
->i_ss
.rate
, r
->o_ss
.rate
) == 0);
810 pa_assert(r
->resample_method
>= PA_RESAMPLER_SPEEX_FLOAT_BASE
&& r
->resample_method
<= PA_RESAMPLER_SPEEX_FLOAT_MAX
);
811 pa_assert_se(paspfl_resampler_set_rate(r
->speex
.state
, r
->i_ss
.rate
, r
->o_ss
.rate
) == 0);
815 static void speex_free(pa_resampler
*r
) {
821 if (r
->resample_method
>= PA_RESAMPLER_SPEEX_FIXED_BASE
&& r
->resample_method
<= PA_RESAMPLER_SPEEX_FIXED_MAX
)
822 paspfx_resampler_destroy(r
->speex
.state
);
824 pa_assert(r
->resample_method
>= PA_RESAMPLER_SPEEX_FLOAT_BASE
&& r
->resample_method
<= PA_RESAMPLER_SPEEX_FLOAT_MAX
);
825 paspfl_resampler_destroy(r
->speex
.state
);
829 static int speex_init(pa_resampler
*r
) {
834 r
->impl_free
= speex_free
;
835 r
->impl_update_rates
= speex_update_rates
;
837 if (r
->resample_method
>= PA_RESAMPLER_SPEEX_FIXED_BASE
&& r
->resample_method
<= PA_RESAMPLER_SPEEX_FIXED_MAX
) {
838 q
= r
->resample_method
- PA_RESAMPLER_SPEEX_FIXED_BASE
;
840 pa_log_info("Choosing speex quality setting %i.", q
);
842 if (!(r
->speex
.state
= paspfx_resampler_init(r
->o_ss
.channels
, r
->i_ss
.rate
, r
->o_ss
.rate
, q
, &err
)))
845 r
->impl_resample
= speex_resample_int
;
847 pa_assert(r
->resample_method
>= PA_RESAMPLER_SPEEX_FLOAT_BASE
&& r
->resample_method
<= PA_RESAMPLER_SPEEX_FLOAT_MAX
);
848 q
= r
->resample_method
- PA_RESAMPLER_SPEEX_FLOAT_BASE
;
850 pa_log_info("Choosing speex quality setting %i.", q
);
852 if (!(r
->speex
.state
= paspfl_resampler_init(r
->o_ss
.channels
, r
->i_ss
.rate
, r
->o_ss
.rate
, q
, &err
)))
855 r
->impl_resample
= speex_resample_float
;
861 /* Trivial implementation */
863 static void trivial_resample(pa_resampler
*r
, const pa_memchunk
*input
, unsigned in_n_frames
, pa_memchunk
*output
, unsigned *out_n_frames
) {
871 pa_assert(out_n_frames
);
873 fz
= r
->w_sz
* r
->o_ss
.channels
;
875 src
= (uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
;
876 dst
= (uint8_t*) pa_memblock_acquire(output
->memblock
) + output
->index
;
878 for (o_index
= 0;; o_index
++, r
->trivial
.o_counter
++) {
881 j
= ((r
->trivial
.o_counter
* r
->i_ss
.rate
) / r
->o_ss
.rate
);
882 j
= j
> r
->trivial
.i_counter
? j
- r
->trivial
.i_counter
: 0;
884 if (j
>= in_n_frames
)
887 pa_assert(o_index
* fz
< pa_memblock_get_length(output
->memblock
));
889 oil_memcpy((uint8_t*) dst
+ fz
* o_index
,
890 (uint8_t*) src
+ fz
* j
, fz
);
893 pa_memblock_release(input
->memblock
);
894 pa_memblock_release(output
->memblock
);
896 *out_n_frames
= o_index
;
898 r
->trivial
.i_counter
+= in_n_frames
;
900 /* Normalize counters */
901 while (r
->trivial
.i_counter
>= r
->i_ss
.rate
) {
902 pa_assert(r
->trivial
.o_counter
>= r
->o_ss
.rate
);
904 r
->trivial
.i_counter
-= r
->i_ss
.rate
;
905 r
->trivial
.o_counter
-= r
->o_ss
.rate
;
909 static void trivial_update_rates(pa_resampler
*r
) {
912 r
->trivial
.i_counter
= 0;
913 r
->trivial
.o_counter
= 0;
916 static int trivial_init(pa_resampler
*r
) {
919 r
->trivial
.o_counter
= r
->trivial
.i_counter
= 0;
921 r
->impl_resample
= trivial_resample
;
922 r
->impl_update_rates
= trivial_update_rates
;
928 /*** ffmpeg based implementation ***/
930 static void ffmpeg_resample(pa_resampler
*r
, const pa_memchunk
*input
, unsigned in_n_frames
, pa_memchunk
*output
, unsigned *out_n_frames
) {
931 unsigned used_frames
= 0, c
;
936 pa_assert(out_n_frames
);
938 for (c
= 0; c
< r
->o_ss
.channels
; c
++) {
941 int16_t *p
, *t
, *k
, *q
, *s
;
945 /* Allocate a new block */
946 b
= pa_memblock_new(r
->mempool
, r
->ffmpeg
.buf
[c
].length
+ in_n_frames
* sizeof(int16_t));
947 p
= pa_memblock_acquire(b
);
949 /* Copy the remaining data into it */
950 l
= r
->ffmpeg
.buf
[c
].length
;
951 if (r
->ffmpeg
.buf
[c
].memblock
) {
952 t
= (int16_t*) ((uint8_t*) pa_memblock_acquire(r
->ffmpeg
.buf
[c
].memblock
) + r
->ffmpeg
.buf
[c
].index
);
954 pa_memblock_release(r
->ffmpeg
.buf
[c
].memblock
);
955 pa_memblock_unref(r
->ffmpeg
.buf
[c
].memblock
);
956 pa_memchunk_reset(&r
->ffmpeg
.buf
[c
]);
959 /* Now append the new data, splitting up channels */
960 t
= ((int16_t*) ((uint8_t*) pa_memblock_acquire(input
->memblock
) + input
->index
)) + c
;
961 k
= (int16_t*) ((uint8_t*) p
+ l
);
962 for (u
= 0; u
< in_n_frames
; u
++) {
964 t
+= r
->o_ss
.channels
;
967 pa_memblock_release(input
->memblock
);
969 /* Calculate the resulting number of frames */
970 in
= in_n_frames
+ l
/ sizeof(int16_t);
972 /* Allocate buffer for the result */
973 w
= pa_memblock_new(r
->mempool
, *out_n_frames
* sizeof(int16_t));
974 q
= pa_memblock_acquire(w
);
977 used_frames
= av_resample(r
->ffmpeg
.state
,
981 c
>= (unsigned) r
->o_ss
.channels
-1);
983 pa_memblock_release(b
);
985 /* Now store the remaining samples away */
986 pa_assert(consumed_frames
<= (int) in
);
987 if (consumed_frames
< (int) in
) {
988 r
->ffmpeg
.buf
[c
].memblock
= b
;
989 r
->ffmpeg
.buf
[c
].index
= consumed_frames
* sizeof(int16_t);
990 r
->ffmpeg
.buf
[c
].length
= (in
- consumed_frames
) * sizeof(int16_t);
992 pa_memblock_unref(b
);
994 /* And place the results in the output buffer */
995 s
= (short*) ((uint8_t*) pa_memblock_acquire(output
->memblock
) + output
->index
) + c
;
996 for (u
= 0; u
< used_frames
; u
++) {
999 s
+= r
->o_ss
.channels
;
1001 pa_memblock_release(output
->memblock
);
1002 pa_memblock_release(w
);
1003 pa_memblock_unref(w
);
1006 *out_n_frames
= used_frames
;
1009 static void ffmpeg_free(pa_resampler
*r
) {
1014 if (r
->ffmpeg
.state
)
1015 av_resample_close(r
->ffmpeg
.state
);
1017 for (c
= 0; c
< PA_ELEMENTSOF(r
->ffmpeg
.buf
); c
++)
1018 if (r
->ffmpeg
.buf
[c
].memblock
)
1019 pa_memblock_unref(r
->ffmpeg
.buf
[c
].memblock
);
1022 static int ffmpeg_init(pa_resampler
*r
) {
1027 /* We could probably implement different quality levels by
1028 * adjusting the filter parameters here. However, ffmpeg
1029 * internally only uses these hardcoded values, so let's use them
1030 * here for now as well until ffmpeg makes this configurable. */
1032 if (!(r
->ffmpeg
.state
= av_resample_init(r
->o_ss
.rate
, r
->i_ss
.rate
, 16, 10, 0, 0.8)))
1035 r
->impl_free
= ffmpeg_free
;
1036 r
->impl_resample
= ffmpeg_resample
;
1038 for (c
= 0; c
< PA_ELEMENTSOF(r
->ffmpeg
.buf
); c
++)
1039 pa_memchunk_reset(&r
->ffmpeg
.buf
[c
]);
1044 /*** copy (noop) implementation ***/
1046 static int copy_init(pa_resampler
*r
) {
1049 pa_assert(r
->o_ss
.rate
== r
->i_ss
.rate
);
1051 r
->impl_free
= NULL
;
1052 r
->impl_resample
= NULL
;
1053 r
->impl_update_rates
= NULL
;