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FFmpeg/libavresample/audio_convert.c

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/*
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "config.h"
#include "libavutil/common.h"
#include "libavutil/libm.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/samplefmt.h"
#include "audio_convert.h"
#include "audio_data.h"
#include "dither.h"
enum ConvFuncType {
CONV_FUNC_TYPE_FLAT,
CONV_FUNC_TYPE_INTERLEAVE,
CONV_FUNC_TYPE_DEINTERLEAVE,
};
typedef void (conv_func_flat)(uint8_t *out, const uint8_t *in, int len);
typedef void (conv_func_interleave)(uint8_t *out, uint8_t *const *in,
int len, int channels);
typedef void (conv_func_deinterleave)(uint8_t **out, const uint8_t *in, int len,
int channels);
struct AudioConvert {
AVAudioResampleContext *avr;
DitherContext *dc;
enum AVSampleFormat in_fmt;
enum AVSampleFormat out_fmt;
int apply_map;
int channels;
int planes;
int ptr_align;
int samples_align;
int has_optimized_func;
const char *func_descr;
const char *func_descr_generic;
enum ConvFuncType func_type;
conv_func_flat *conv_flat;
conv_func_flat *conv_flat_generic;
conv_func_interleave *conv_interleave;
conv_func_interleave *conv_interleave_generic;
conv_func_deinterleave *conv_deinterleave;
conv_func_deinterleave *conv_deinterleave_generic;
};
void ff_audio_convert_set_func(AudioConvert *ac, enum AVSampleFormat out_fmt,
enum AVSampleFormat in_fmt, int channels,
int ptr_align, int samples_align,
const char *descr, void *conv)
{
int found = 0;
switch (ac->func_type) {
case CONV_FUNC_TYPE_FLAT:
if (av_get_packed_sample_fmt(ac->in_fmt) == in_fmt &&
av_get_packed_sample_fmt(ac->out_fmt) == out_fmt) {
ac->conv_flat = conv;
ac->func_descr = descr;
ac->ptr_align = ptr_align;
ac->samples_align = samples_align;
if (ptr_align == 1 && samples_align == 1) {
ac->conv_flat_generic = conv;
ac->func_descr_generic = descr;
} else {
ac->has_optimized_func = 1;
}
found = 1;
}
break;
case CONV_FUNC_TYPE_INTERLEAVE:
if (ac->in_fmt == in_fmt && ac->out_fmt == out_fmt &&
(!channels || ac->channels == channels)) {
ac->conv_interleave = conv;
ac->func_descr = descr;
ac->ptr_align = ptr_align;
ac->samples_align = samples_align;
if (ptr_align == 1 && samples_align == 1) {
ac->conv_interleave_generic = conv;
ac->func_descr_generic = descr;
} else {
ac->has_optimized_func = 1;
}
found = 1;
}
break;
case CONV_FUNC_TYPE_DEINTERLEAVE:
if (ac->in_fmt == in_fmt && ac->out_fmt == out_fmt &&
(!channels || ac->channels == channels)) {
ac->conv_deinterleave = conv;
ac->func_descr = descr;
ac->ptr_align = ptr_align;
ac->samples_align = samples_align;
if (ptr_align == 1 && samples_align == 1) {
ac->conv_deinterleave_generic = conv;
ac->func_descr_generic = descr;
} else {
ac->has_optimized_func = 1;
}
found = 1;
}
break;
}
if (found) {
av_log(ac->avr, AV_LOG_DEBUG, "audio_convert: found function: %-4s "
"to %-4s (%s)\n", av_get_sample_fmt_name(ac->in_fmt),
av_get_sample_fmt_name(ac->out_fmt), descr);
}
}
#define CONV_FUNC_NAME(dst_fmt, src_fmt) conv_ ## src_fmt ## _to_ ## dst_fmt
#define CONV_LOOP(otype, expr) \
do { \
*(otype *)po = expr; \
pi += is; \
po += os; \
} while (po < end); \
#define CONV_FUNC_FLAT(ofmt, otype, ifmt, itype, expr) \
static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *out, const uint8_t *in, \
int len) \
{ \
int is = sizeof(itype); \
int os = sizeof(otype); \
const uint8_t *pi = in; \
uint8_t *po = out; \
uint8_t *end = out + os * len; \
CONV_LOOP(otype, expr) \
}
#define CONV_FUNC_INTERLEAVE(ofmt, otype, ifmt, itype, expr) \
static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *out, const uint8_t **in, \
int len, int channels) \
{ \
int ch; \
int out_bps = sizeof(otype); \
int is = sizeof(itype); \
int os = channels * out_bps; \
for (ch = 0; ch < channels; ch++) { \
const uint8_t *pi = in[ch]; \
uint8_t *po = out + ch * out_bps; \
uint8_t *end = po + os * len; \
CONV_LOOP(otype, expr) \
} \
}
#define CONV_FUNC_DEINTERLEAVE(ofmt, otype, ifmt, itype, expr) \
static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t **out, const uint8_t *in, \
int len, int channels) \
{ \
int ch; \
int in_bps = sizeof(itype); \
int is = channels * in_bps; \
int os = sizeof(otype); \
for (ch = 0; ch < channels; ch++) { \
const uint8_t *pi = in + ch * in_bps; \
uint8_t *po = out[ch]; \
uint8_t *end = po + os * len; \
CONV_LOOP(otype, expr) \
} \
}
#define CONV_FUNC_GROUP(ofmt, otype, ifmt, itype, expr) \
CONV_FUNC_FLAT( ofmt, otype, ifmt, itype, expr) \
CONV_FUNC_INTERLEAVE( ofmt, otype, ifmt ## P, itype, expr) \
CONV_FUNC_DEINTERLEAVE(ofmt ## P, otype, ifmt, itype, expr)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_U8, uint8_t, *(const uint8_t *)pi)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) << 8)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) << 24)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) * (1.0f / (1 << 7)))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t, (*(const uint8_t *)pi - 0x80) * (1.0 / (1 << 7)))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t, (*(const int16_t *)pi >> 8) + 0x80)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi << 16)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi * (1.0f / (1 << 15)))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *)pi * (1.0 / (1 << 15)))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t, (*(const int32_t *)pi >> 24) + 0x80)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi >> 16)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi * (1.0f / (1U << 31)))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *)pi * (1.0 / (1U << 31)))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8( lrintf(*(const float *)pi * (1 << 7)) + 0x80))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16( lrintf(*(const float *)pi * (1 << 15))))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *)pi * (1U << 31))))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_FLT, float, *(const float *)pi)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_FLT, float, *(const float *)pi)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8( lrint(*(const double *)pi * (1 << 7)) + 0x80))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16( lrint(*(const double *)pi * (1 << 15))))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *)pi * (1U << 31))))
CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_DBL, double, *(const double *)pi)
CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_DBL, double, *(const double *)pi)
#define SET_CONV_FUNC_GROUP(ofmt, ifmt) \
ff_audio_convert_set_func(ac, ofmt, ifmt, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt, ifmt)); \
ff_audio_convert_set_func(ac, ofmt ## P, ifmt, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt ## P, ifmt)); \
ff_audio_convert_set_func(ac, ofmt, ifmt ## P, 0, 1, 1, "C", CONV_FUNC_NAME(ofmt, ifmt ## P));
static void set_generic_function(AudioConvert *ac)
{
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL)
SET_CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL)
}
void ff_audio_convert_free(AudioConvert **ac)
{
if (!*ac)
return;
ff_dither_free(&(*ac)->dc);
av_freep(ac);
}
AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr,
enum AVSampleFormat out_fmt,
enum AVSampleFormat in_fmt,
int channels, int sample_rate,
int apply_map)
{
AudioConvert *ac;
int in_planar, out_planar;
ac = av_mallocz(sizeof(*ac));
if (!ac)
return NULL;
ac->avr = avr;
ac->out_fmt = out_fmt;
ac->in_fmt = in_fmt;
ac->channels = channels;
ac->apply_map = apply_map;
if (avr->dither_method != AV_RESAMPLE_DITHER_NONE &&
av_get_packed_sample_fmt(out_fmt) == AV_SAMPLE_FMT_S16 &&
av_get_bytes_per_sample(in_fmt) > 2) {
ac->dc = ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate,
apply_map);
if (!ac->dc) {
av_free(ac);
return NULL;
}
return ac;
}
in_planar = av_sample_fmt_is_planar(in_fmt);
out_planar = av_sample_fmt_is_planar(out_fmt);
if (in_planar == out_planar) {
ac->func_type = CONV_FUNC_TYPE_FLAT;
ac->planes = in_planar ? ac->channels : 1;
} else if (in_planar)
ac->func_type = CONV_FUNC_TYPE_INTERLEAVE;
else
ac->func_type = CONV_FUNC_TYPE_DEINTERLEAVE;
set_generic_function(ac);
if (ARCH_ARM)
ff_audio_convert_init_arm(ac);
if (ARCH_X86)
ff_audio_convert_init_x86(ac);
return ac;
}
int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in)
{
int use_generic = 1;
int len = in->nb_samples;
int p;
if (ac->dc) {
/* dithered conversion */
av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (dithered)\n",
len, av_get_sample_fmt_name(ac->in_fmt),
av_get_sample_fmt_name(ac->out_fmt));
return ff_convert_dither(ac->dc, out, in);
}
/* determine whether to use the optimized function based on pointer and
samples alignment in both the input and output */
if (ac->has_optimized_func) {
int ptr_align = FFMIN(in->ptr_align, out->ptr_align);
int samples_align = FFMIN(in->samples_align, out->samples_align);
int aligned_len = FFALIGN(len, ac->samples_align);
if (!(ptr_align % ac->ptr_align) && samples_align >= aligned_len) {
len = aligned_len;
use_generic = 0;
}
}
av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (%s)\n", len,
av_get_sample_fmt_name(ac->in_fmt),
av_get_sample_fmt_name(ac->out_fmt),
use_generic ? ac->func_descr_generic : ac->func_descr);
if (ac->apply_map) {
ChannelMapInfo *map = &ac->avr->ch_map_info;
if (!av_sample_fmt_is_planar(ac->out_fmt)) {
av_log(ac->avr, AV_LOG_ERROR, "cannot remap packed format during conversion\n");
return AVERROR(EINVAL);
}
if (map->do_remap) {
if (av_sample_fmt_is_planar(ac->in_fmt)) {
conv_func_flat *convert = use_generic ? ac->conv_flat_generic :
ac->conv_flat;
for (p = 0; p < ac->planes; p++)
if (map->channel_map[p] >= 0)
convert(out->data[p], in->data[map->channel_map[p]], len);
} else {
uint8_t *data[AVRESAMPLE_MAX_CHANNELS];
conv_func_deinterleave *convert = use_generic ?
ac->conv_deinterleave_generic :
ac->conv_deinterleave;
for (p = 0; p < ac->channels; p++)
data[map->input_map[p]] = out->data[p];
convert(data, in->data[0], len, ac->channels);
}
}
if (map->do_copy || map->do_zero) {
for (p = 0; p < ac->planes; p++) {
if (map->channel_copy[p])
memcpy(out->data[p], out->data[map->channel_copy[p]],
len * out->stride);
else if (map->channel_zero[p])
av_samples_set_silence(&out->data[p], 0, len, 1, ac->out_fmt);
}
}
} else {
switch (ac->func_type) {
case CONV_FUNC_TYPE_FLAT: {
if (!in->is_planar)
len *= in->channels;
if (use_generic) {
for (p = 0; p < ac->planes; p++)
ac->conv_flat_generic(out->data[p], in->data[p], len);
} else {
for (p = 0; p < ac->planes; p++)
ac->conv_flat(out->data[p], in->data[p], len);
}
break;
}
case CONV_FUNC_TYPE_INTERLEAVE:
if (use_generic)
ac->conv_interleave_generic(out->data[0], in->data, len,
ac->channels);
else
ac->conv_interleave(out->data[0], in->data, len, ac->channels);
break;
case CONV_FUNC_TYPE_DEINTERLEAVE:
if (use_generic)
ac->conv_deinterleave_generic(out->data, in->data[0], len,
ac->channels);
else
ac->conv_deinterleave(out->data, in->data[0], len,
ac->channels);
break;
}
}
out->nb_samples = in->nb_samples;
return 0;
}