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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavresample / audio_convert.c
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2ba45a60
DM		 1/*
2 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <stdint.h>
23
24#include "config.h"
25#include "libavutil/common.h"
26#include "libavutil/libm.h"
27#include "libavutil/log.h"
28#include "libavutil/mem.h"
29#include "libavutil/samplefmt.h"
30#include "audio_convert.h"
31#include "audio_data.h"
32#include "dither.h"
33
34enum ConvFuncType {
35 CONV_FUNC_TYPE_FLAT,
36 CONV_FUNC_TYPE_INTERLEAVE,
37 CONV_FUNC_TYPE_DEINTERLEAVE,
38};
39
40typedef void (conv_func_flat)(uint8_t *out, const uint8_t *in, int len);
41
42typedef void (conv_func_interleave)(uint8_t *out, uint8_t *const *in,
43 int len, int channels);
44
45typedef void (conv_func_deinterleave)(uint8_t **out, const uint8_t *in, int len,
46 int channels);
47
48struct AudioConvert {
49 AVAudioResampleContext *avr;
50 DitherContext *dc;
51 enum AVSampleFormat in_fmt;
52 enum AVSampleFormat out_fmt;
53 int apply_map;
54 int channels;
55 int planes;
56 int ptr_align;
57 int samples_align;
58 int has_optimized_func;
59 const char *func_descr;
60 const char *func_descr_generic;
61 enum ConvFuncType func_type;
62 conv_func_flat *conv_flat;
63 conv_func_flat *conv_flat_generic;
64 conv_func_interleave *conv_interleave;
65 conv_func_interleave *conv_interleave_generic;
66 conv_func_deinterleave *conv_deinterleave;
67 conv_func_deinterleave *conv_deinterleave_generic;
68};
69
70void ff_audio_convert_set_func(AudioConvert *ac, enum AVSampleFormat out_fmt,
71 enum AVSampleFormat in_fmt, int channels,
72 int ptr_align, int samples_align,
73 const char *descr, void *conv)
74{
75 int found = 0;
76
77 switch (ac->func_type) {
78 case CONV_FUNC_TYPE_FLAT:
79 if (av_get_packed_sample_fmt(ac->in_fmt) == in_fmt &&
80 av_get_packed_sample_fmt(ac->out_fmt) == out_fmt) {
81 ac->conv_flat = conv;
82 ac->func_descr = descr;
83 ac->ptr_align = ptr_align;
84 ac->samples_align = samples_align;
85 if (ptr_align == 1 && samples_align == 1) {
86 ac->conv_flat_generic = conv;
87 ac->func_descr_generic = descr;
88 } else {
89 ac->has_optimized_func = 1;
90 }
91 found = 1;
92 }
93 break;
94 case CONV_FUNC_TYPE_INTERLEAVE:
95 if (ac->in_fmt == in_fmt && ac->out_fmt == out_fmt &&
96 (!channels || ac->channels == channels)) {
97 ac->conv_interleave = conv;
98 ac->func_descr = descr;
99 ac->ptr_align = ptr_align;
100 ac->samples_align = samples_align;
101 if (ptr_align == 1 && samples_align == 1) {
102 ac->conv_interleave_generic = conv;
103 ac->func_descr_generic = descr;
104 } else {
105 ac->has_optimized_func = 1;
106 }
107 found = 1;
108 }
109 break;
110 case CONV_FUNC_TYPE_DEINTERLEAVE:
111 if (ac->in_fmt == in_fmt && ac->out_fmt == out_fmt &&
112 (!channels || ac->channels == channels)) {
113 ac->conv_deinterleave = conv;
114 ac->func_descr = descr;
115 ac->ptr_align = ptr_align;
116 ac->samples_align = samples_align;
117 if (ptr_align == 1 && samples_align == 1) {
118 ac->conv_deinterleave_generic = conv;
119 ac->func_descr_generic = descr;
120 } else {
121 ac->has_optimized_func = 1;
122 }
123 found = 1;
124 }
125 break;
126 }
127 if (found) {
128 av_log(ac->avr, AV_LOG_DEBUG, "audio_convert: found function: %-4s "
129 "to %-4s (%s)\n", av_get_sample_fmt_name(ac->in_fmt),
130 av_get_sample_fmt_name(ac->out_fmt), descr);
131 }
132}
133
134#define CONV_FUNC_NAME(dst_fmt, src_fmt) conv_ ## src_fmt ## _to_ ## dst_fmt
135
136#define CONV_LOOP(otype, expr) \
137 do { \
138 *(otype *)po = expr; \
139 pi += is; \
140 po += os; \
141 } while (po < end); \
142
143#define CONV_FUNC_FLAT(ofmt, otype, ifmt, itype, expr) \
144static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *out, const uint8_t *in, \
145 int len) \
146{ \
147 int is = sizeof(itype); \
148 int os = sizeof(otype); \
149 const uint8_t *pi = in; \
150 uint8_t *po = out; \
151 uint8_t *end = out + os * len; \
152 CONV_LOOP(otype, expr) \
153}
154
155#define CONV_FUNC_INTERLEAVE(ofmt, otype, ifmt, itype, expr) \
156static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *out, const uint8_t **in, \
157 int len, int channels) \
158{ \
159 int ch; \
160 int out_bps = sizeof(otype); \
161 int is = sizeof(itype); \
162 int os = channels * out_bps; \
163 for (ch = 0; ch < channels; ch++) { \
164 const uint8_t *pi = in[ch]; \
165 uint8_t *po = out + ch * out_bps; \
166 uint8_t *end = po + os * len; \
167 CONV_LOOP(otype, expr) \
168 } \
169}
170
171#define CONV_FUNC_DEINTERLEAVE(ofmt, otype, ifmt, itype, expr) \
172static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t **out, const uint8_t *in, \
173 int len, int channels) \
174{ \
175 int ch; \
176 int in_bps = sizeof(itype); \
177 int is = channels * in_bps; \
178 int os = sizeof(otype); \
179 for (ch = 0; ch < channels; ch++) { \
180 const uint8_t *pi = in + ch * in_bps; \
181 uint8_t *po = out[ch]; \
182 uint8_t *end = po + os * len; \
183 CONV_LOOP(otype, expr) \
184 } \
185}
186
187#define CONV_FUNC_GROUP(ofmt, otype, ifmt, itype, expr) \
188CONV_FUNC_FLAT( ofmt, otype, ifmt, itype, expr) \
189CONV_FUNC_INTERLEAVE( ofmt, otype, ifmt ## P, itype, expr) \
190CONV_FUNC_DEINTERLEAVE(ofmt ## P, otype, ifmt, itype, expr)
191
192CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_U8, uint8_t, *(const uint8_t *)pi)
193CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) << 8)
194CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) << 24)
195CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) * (1.0f / (1 << 7)))
196CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) * (1.0 / (1 << 7)))
197CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t, (*(const int16_t *)pi >> 8) + 0x80)
198CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi)
199CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi << 16)
200CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi * (1.0f / (1 << 15)))
201CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi * (1.0 / (1 << 15)))
202CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t, (*(const int32_t *)pi >> 24) + 0x80)
203CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi >> 16)
204CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi)
205CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi * (1.0f / (1U << 31)))
206CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi * (1.0 / (1U << 31)))
207CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8( lrintf(*(const float *)pi * (1 << 7)) + 0x80))
208CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16( lrintf(*(const float *)pi * (1 << 15))))
209CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *)pi * (1U << 31))))
210CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_FLT, float, *(const float *)pi)
211CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_FLT, float, *(const float *)pi)
212CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8( lrint(*(const double *)pi * (1 << 7)) + 0x80))
213CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16( lrint(*(const double *)pi * (1 << 15))))
214CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *)pi * (1U << 31))))
215CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_DBL, double, *(const double *)pi)
216CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_DBL, double, *(const double *)pi)
217
218#define SET_CONV_FUNC_GROUP(ofmt, ifmt) \
219ff_audio_convert_set_func(ac, ofmt, ifmt, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt, ifmt)); \
220ff_audio_convert_set_func(ac, ofmt ## P, ifmt, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt ## P, ifmt)); \
221ff_audio_convert_set_func(ac, ofmt, ifmt ## P, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt, ifmt ## P));
222
223static void set_generic_function(AudioConvert *ac)
224{
225 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8)
226 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8)
227 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8)
228 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8)
229 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8)
230 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16)
231 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16)
232 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16)
233 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16)
234 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16)
235 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32)
236 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32)
237 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32)
238 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32)
239 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32)
240 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT)
241 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT)
242 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT)
243 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT)
244 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT)
245 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL)
246 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL)
247 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL)
248 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL)
249 SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL)
250}
251
252void ff_audio_convert_free(AudioConvert **ac)
253{
254 if (!*ac)
255 return;
256 ff_dither_free(&(*ac)->dc);
257 av_freep(ac);
258}
259
260AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr,
261 enum AVSampleFormat out_fmt,
262 enum AVSampleFormat in_fmt,
263 int channels, int sample_rate,
264 int apply_map)
265{
266 AudioConvert *ac;
267 int in_planar, out_planar;
268
269 ac = av_mallocz(sizeof(*ac));
270 if (!ac)
271 return NULL;
272
273 ac->avr = avr;
274 ac->out_fmt = out_fmt;
275 ac->in_fmt = in_fmt;
276 ac->channels = channels;
277 ac->apply_map = apply_map;
278
279 if (avr->dither_method != AV_RESAMPLE_DITHER_NONE &&
280 av_get_packed_sample_fmt(out_fmt) == AV_SAMPLE_FMT_S16 &&
281 av_get_bytes_per_sample(in_fmt) > 2) {
282 ac->dc = ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate,
283 apply_map);
284 if (!ac->dc) {
285 av_free(ac);
286 return NULL;
287 }
288 return ac;
289 }
290
291 in_planar = ff_sample_fmt_is_planar(in_fmt, channels);
292 out_planar = ff_sample_fmt_is_planar(out_fmt, channels);
293
294 if (in_planar == out_planar) {
295 ac->func_type = CONV_FUNC_TYPE_FLAT;
296 ac->planes = in_planar ? ac->channels : 1;
297 } else if (in_planar)
298 ac->func_type = CONV_FUNC_TYPE_INTERLEAVE;
299 else
300 ac->func_type = CONV_FUNC_TYPE_DEINTERLEAVE;
301
302 set_generic_function(ac);
303
304 if (ARCH_AARCH64)
305 ff_audio_convert_init_aarch64(ac);
306 if (ARCH_ARM)
307 ff_audio_convert_init_arm(ac);
308 if (ARCH_X86)
309 ff_audio_convert_init_x86(ac);
310
311 return ac;
312}
313
314int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in)
315{
316 int use_generic = 1;
317 int len = in->nb_samples;
318 int p;
319
320 if (ac->dc) {
321 /* dithered conversion */
322 av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (dithered)\n",
323 len, av_get_sample_fmt_name(ac->in_fmt),
324 av_get_sample_fmt_name(ac->out_fmt));
325
326 return ff_convert_dither(ac->dc, out, in);
327 }
328
329 /* determine whether to use the optimized function based on pointer and
330 samples alignment in both the input and output */
331 if (ac->has_optimized_func) {
332 int ptr_align = FFMIN(in->ptr_align, out->ptr_align);
333 int samples_align = FFMIN(in->samples_align, out->samples_align);
334 int aligned_len = FFALIGN(len, ac->samples_align);
335 if (!(ptr_align % ac->ptr_align) && samples_align >= aligned_len) {
336 len = aligned_len;
337 use_generic = 0;
338 }
339 }
340 av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (%s)\n", len,
341 av_get_sample_fmt_name(ac->in_fmt),
342 av_get_sample_fmt_name(ac->out_fmt),
343 use_generic ? ac->func_descr_generic : ac->func_descr);
344
345 if (ac->apply_map) {
346 ChannelMapInfo *map = &ac->avr->ch_map_info;
347
348 if (!ff_sample_fmt_is_planar(ac->out_fmt, ac->channels)) {
349 av_log(ac->avr, AV_LOG_ERROR, "cannot remap packed format during conversion\n");
350 return AVERROR(EINVAL);
351 }
352
353 if (map->do_remap) {
354 if (ff_sample_fmt_is_planar(ac->in_fmt, ac->channels)) {
355 conv_func_flat *convert = use_generic ? ac->conv_flat_generic :
356 ac->conv_flat;
357
358 for (p = 0; p < ac->planes; p++)
359 if (map->channel_map[p] >= 0)
360 convert(out->data[p], in->data[map->channel_map[p]], len);
361 } else {
362 uint8_t *data[AVRESAMPLE_MAX_CHANNELS];
363 conv_func_deinterleave *convert = use_generic ?
364 ac->conv_deinterleave_generic :
365 ac->conv_deinterleave;
366
367 for (p = 0; p < ac->channels; p++)
368 data[map->input_map[p]] = out->data[p];
369
370 convert(data, in->data[0], len, ac->channels);
371 }
372 }
373 if (map->do_copy || map->do_zero) {
374 for (p = 0; p < ac->planes; p++) {
375 if (map->channel_copy[p])
376 memcpy(out->data[p], out->data[map->channel_copy[p]],
377 len * out->stride);
378 else if (map->channel_zero[p])
379 av_samples_set_silence(&out->data[p], 0, len, 1, ac->out_fmt);
380 }
381 }
382 } else {
383 switch (ac->func_type) {
384 case CONV_FUNC_TYPE_FLAT: {
385 if (!in->is_planar)
386 len *= in->channels;
387 if (use_generic) {
388 for (p = 0; p < ac->planes; p++)
389 ac->conv_flat_generic(out->data[p], in->data[p], len);
390 } else {
391 for (p = 0; p < ac->planes; p++)
392 ac->conv_flat(out->data[p], in->data[p], len);
393 }
394 break;
395 }
396 case CONV_FUNC_TYPE_INTERLEAVE:
397 if (use_generic)
398 ac->conv_interleave_generic(out->data[0], in->data, len,
399 ac->channels);
400 else
401 ac->conv_interleave(out->data[0], in->data, len, ac->channels);
402 break;
403 case CONV_FUNC_TYPE_DEINTERLEAVE:
404 if (use_generic)
405 ac->conv_deinterleave_generic(out->data, in->data[0], len,
406 ac->channels);
407 else
408 ac->conv_deinterleave(out->data, in->data[0], len,
409 ac->channels);
410 break;
411 }
412 }
413
414 out->nb_samples = in->nb_samples;
415 return 0;
416}
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