mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
c8af852b97
This is a new library for audio sample format, channel layout, and sample rate conversion.
335 lines
16 KiB
C
335 lines
16 KiB
C
/*
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/libm.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/samplefmt.h"
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#include "audio_convert.h"
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#include "audio_data.h"
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enum ConvFuncType {
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CONV_FUNC_TYPE_FLAT,
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CONV_FUNC_TYPE_INTERLEAVE,
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CONV_FUNC_TYPE_DEINTERLEAVE,
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};
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typedef void (conv_func_flat)(uint8_t *out, const uint8_t *in, int len);
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typedef void (conv_func_interleave)(uint8_t *out, uint8_t *const *in,
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int len, int channels);
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typedef void (conv_func_deinterleave)(uint8_t **out, const uint8_t *in, int len,
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int channels);
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struct AudioConvert {
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AVAudioResampleContext *avr;
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enum AVSampleFormat in_fmt;
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enum AVSampleFormat out_fmt;
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int channels;
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int planes;
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int ptr_align;
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int samples_align;
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int has_optimized_func;
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const char *func_descr;
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const char *func_descr_generic;
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enum ConvFuncType func_type;
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conv_func_flat *conv_flat;
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conv_func_flat *conv_flat_generic;
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conv_func_interleave *conv_interleave;
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conv_func_interleave *conv_interleave_generic;
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conv_func_deinterleave *conv_deinterleave;
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conv_func_deinterleave *conv_deinterleave_generic;
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};
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void ff_audio_convert_set_func(AudioConvert *ac, enum AVSampleFormat out_fmt,
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enum AVSampleFormat in_fmt, int channels,
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int ptr_align, int samples_align,
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const char *descr, void *conv)
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{
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int found = 0;
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switch (ac->func_type) {
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case CONV_FUNC_TYPE_FLAT:
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if (av_get_packed_sample_fmt(ac->in_fmt) == in_fmt &&
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av_get_packed_sample_fmt(ac->out_fmt) == out_fmt) {
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ac->conv_flat = conv;
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ac->func_descr = descr;
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ac->ptr_align = ptr_align;
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ac->samples_align = samples_align;
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if (ptr_align == 1 && samples_align == 1) {
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ac->conv_flat_generic = conv;
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ac->func_descr_generic = descr;
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} else {
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ac->has_optimized_func = 1;
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}
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found = 1;
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}
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break;
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case CONV_FUNC_TYPE_INTERLEAVE:
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if (ac->in_fmt == in_fmt && ac->out_fmt == out_fmt &&
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(!channels || ac->channels == channels)) {
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ac->conv_interleave = conv;
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ac->func_descr = descr;
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ac->ptr_align = ptr_align;
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ac->samples_align = samples_align;
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if (ptr_align == 1 && samples_align == 1) {
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ac->conv_interleave_generic = conv;
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ac->func_descr_generic = descr;
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} else {
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ac->has_optimized_func = 1;
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}
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found = 1;
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}
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break;
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case CONV_FUNC_TYPE_DEINTERLEAVE:
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if (ac->in_fmt == in_fmt && ac->out_fmt == out_fmt &&
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(!channels || ac->channels == channels)) {
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ac->conv_deinterleave = conv;
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ac->func_descr = descr;
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ac->ptr_align = ptr_align;
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ac->samples_align = samples_align;
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if (ptr_align == 1 && samples_align == 1) {
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ac->conv_deinterleave_generic = conv;
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ac->func_descr_generic = descr;
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} else {
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ac->has_optimized_func = 1;
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}
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found = 1;
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}
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break;
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}
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if (found) {
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av_log(ac->avr, AV_LOG_DEBUG, "audio_convert: found function: %-4s "
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"to %-4s (%s)\n", av_get_sample_fmt_name(ac->in_fmt),
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av_get_sample_fmt_name(ac->out_fmt), descr);
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}
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}
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#define CONV_FUNC_NAME(dst_fmt, src_fmt) conv_ ## src_fmt ## _to_ ## dst_fmt
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#define CONV_LOOP(otype, expr) \
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do { \
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*(otype *)po = expr; \
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pi += is; \
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po += os; \
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} while (po < end); \
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#define CONV_FUNC_FLAT(ofmt, otype, ifmt, itype, expr) \
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static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *out, const uint8_t *in, \
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int len) \
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{ \
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int is = sizeof(itype); \
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int os = sizeof(otype); \
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const uint8_t *pi = in; \
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uint8_t *po = out; \
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uint8_t *end = out + os * len; \
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CONV_LOOP(otype, expr) \
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}
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#define CONV_FUNC_INTERLEAVE(ofmt, otype, ifmt, itype, expr) \
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static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *out, const uint8_t **in, \
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int len, int channels) \
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{ \
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int ch; \
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int out_bps = sizeof(otype); \
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int is = sizeof(itype); \
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int os = channels * out_bps; \
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for (ch = 0; ch < channels; ch++) { \
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const uint8_t *pi = in[ch]; \
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uint8_t *po = out + ch * out_bps; \
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uint8_t *end = po + os * len; \
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CONV_LOOP(otype, expr) \
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} \
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}
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#define CONV_FUNC_DEINTERLEAVE(ofmt, otype, ifmt, itype, expr) \
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static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t **out, const uint8_t *in, \
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int len, int channels) \
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{ \
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int ch; \
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int in_bps = sizeof(itype); \
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int is = channels * in_bps; \
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int os = sizeof(otype); \
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for (ch = 0; ch < channels; ch++) { \
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const uint8_t *pi = in + ch * in_bps; \
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uint8_t *po = out[ch]; \
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uint8_t *end = po + os * len; \
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CONV_LOOP(otype, expr) \
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} \
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}
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#define CONV_FUNC_GROUP(ofmt, otype, ifmt, itype, expr) \
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CONV_FUNC_FLAT( ofmt, otype, ifmt, itype, expr) \
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CONV_FUNC_INTERLEAVE( ofmt, otype, ifmt ## P, itype, expr) \
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CONV_FUNC_DEINTERLEAVE(ofmt ## P, otype, ifmt, itype, expr)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_U8, uint8_t, *(const uint8_t *)pi)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) << 8)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) << 24)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) * (1.0f / (1 << 7)))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) * (1.0 / (1 << 7)))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t, (*(const int16_t *)pi >> 8) + 0x80)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi << 16)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi * (1.0f / (1 << 15)))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi * (1.0 / (1 << 15)))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t, (*(const int32_t *)pi >> 24) + 0x80)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi >> 16)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi * (1.0f / (1U << 31)))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi * (1.0 / (1U << 31)))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8( lrintf(*(const float *)pi * (1 << 7)) + 0x80))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16( lrintf(*(const float *)pi * (1 << 15))))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *)pi * (1U << 31))))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_FLT, float, *(const float *)pi)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_FLT, float, *(const float *)pi)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8( lrint(*(const double *)pi * (1 << 7)) + 0x80))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16( lrint(*(const double *)pi * (1 << 15))))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *)pi * (1U << 31))))
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_DBL, double, *(const double *)pi)
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CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_DBL, double, *(const double *)pi)
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#define SET_CONV_FUNC_GROUP(ofmt, ifmt) \
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ff_audio_convert_set_func(ac, ofmt, ifmt, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt, ifmt)); \
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ff_audio_convert_set_func(ac, ofmt ## P, ifmt, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt ## P, ifmt)); \
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ff_audio_convert_set_func(ac, ofmt, ifmt ## P, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt, ifmt ## P));
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static void set_generic_function(AudioConvert *ac)
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{
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL)
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SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL)
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}
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AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr,
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enum AVSampleFormat out_fmt,
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enum AVSampleFormat in_fmt,
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int channels)
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{
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AudioConvert *ac;
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int in_planar, out_planar;
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ac = av_mallocz(sizeof(*ac));
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if (!ac)
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return NULL;
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ac->avr = avr;
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ac->out_fmt = out_fmt;
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ac->in_fmt = in_fmt;
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ac->channels = channels;
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in_planar = av_sample_fmt_is_planar(in_fmt);
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out_planar = av_sample_fmt_is_planar(out_fmt);
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if (in_planar == out_planar) {
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ac->func_type = CONV_FUNC_TYPE_FLAT;
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ac->planes = in_planar ? ac->channels : 1;
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} else if (in_planar)
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ac->func_type = CONV_FUNC_TYPE_INTERLEAVE;
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else
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ac->func_type = CONV_FUNC_TYPE_DEINTERLEAVE;
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set_generic_function(ac);
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if (ARCH_X86)
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ff_audio_convert_init_x86(ac);
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return ac;
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}
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int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in, int len)
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{
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int use_generic = 1;
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/* determine whether to use the optimized function based on pointer and
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samples alignment in both the input and output */
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if (ac->has_optimized_func) {
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int ptr_align = FFMIN(in->ptr_align, out->ptr_align);
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int samples_align = FFMIN(in->samples_align, out->samples_align);
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int aligned_len = FFALIGN(len, ac->samples_align);
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if (!(ptr_align % ac->ptr_align) && samples_align >= aligned_len) {
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len = aligned_len;
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use_generic = 0;
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}
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}
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av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (%s)\n", len,
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av_get_sample_fmt_name(ac->in_fmt),
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av_get_sample_fmt_name(ac->out_fmt),
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use_generic ? ac->func_descr_generic : ac->func_descr);
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switch (ac->func_type) {
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case CONV_FUNC_TYPE_FLAT: {
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int p;
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if (!in->is_planar)
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len *= in->channels;
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if (use_generic) {
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for (p = 0; p < ac->planes; p++)
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ac->conv_flat_generic(out->data[p], in->data[p], len);
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} else {
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for (p = 0; p < ac->planes; p++)
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ac->conv_flat(out->data[p], in->data[p], len);
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}
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break;
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}
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case CONV_FUNC_TYPE_INTERLEAVE:
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if (use_generic)
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ac->conv_interleave_generic(out->data[0], in->data, len, ac->channels);
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else
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ac->conv_interleave(out->data[0], in->data, len, ac->channels);
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break;
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case CONV_FUNC_TYPE_DEINTERLEAVE:
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if (use_generic)
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ac->conv_deinterleave_generic(out->data, in->data[0], len, ac->channels);
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else
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ac->conv_deinterleave(out->data, in->data[0], len, ac->channels);
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break;
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}
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out->nb_samples = in->nb_samples;
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return 0;
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}
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