mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-27 09:52:17 +00:00
790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
435 lines
15 KiB
C
435 lines
15 KiB
C
/*
|
|
* Nellymoser encoder
|
|
* This code is developed as part of Google Summer of Code 2008 Program.
|
|
*
|
|
* Copyright (c) 2008 Bartlomiej Wolowiec
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Nellymoser encoder
|
|
* by Bartlomiej Wolowiec
|
|
*
|
|
* Generic codec information: libavcodec/nellymoserdec.c
|
|
*
|
|
* Some information also from: http://samples.mplayerhq.hu/A-codecs/Nelly_Moser/ASAO/ASAO.zip
|
|
* (Copyright Joseph Artsimovich and UAB "DKD")
|
|
*
|
|
* for more information about nellymoser format, visit:
|
|
* http://wiki.multimedia.cx/index.php?title=Nellymoser
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/float_dsp.h"
|
|
#include "libavutil/mathematics.h"
|
|
#include "libavutil/mem.h"
|
|
#include "libavutil/thread.h"
|
|
#include "libavutil/tx.h"
|
|
|
|
#include "audio_frame_queue.h"
|
|
#include "avcodec.h"
|
|
#include "codec_internal.h"
|
|
#include "encode.h"
|
|
#include "nellymoser.h"
|
|
#include "sinewin.h"
|
|
|
|
#define BITSTREAM_WRITER_LE
|
|
#include "put_bits.h"
|
|
|
|
#define POW_TABLE_SIZE (1<<11)
|
|
#define POW_TABLE_OFFSET 3
|
|
#define OPT_SIZE ((1<<15) + 3000)
|
|
|
|
typedef struct NellyMoserEncodeContext {
|
|
AVCodecContext *avctx;
|
|
int last_frame;
|
|
AVFloatDSPContext *fdsp;
|
|
AVTXContext *mdct_ctx;
|
|
av_tx_fn mdct_fn;
|
|
AudioFrameQueue afq;
|
|
DECLARE_ALIGNED(32, float, mdct_out)[NELLY_SAMPLES];
|
|
DECLARE_ALIGNED(32, float, in_buff)[NELLY_SAMPLES];
|
|
DECLARE_ALIGNED(32, float, buf)[3 * NELLY_BUF_LEN]; ///< sample buffer
|
|
float (*opt )[OPT_SIZE];
|
|
uint8_t (*path)[OPT_SIZE];
|
|
} NellyMoserEncodeContext;
|
|
|
|
static float pow_table[POW_TABLE_SIZE]; ///< pow(2, -i / 2048.0 - 3.0);
|
|
|
|
static const uint8_t sf_lut[96] = {
|
|
0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4,
|
|
5, 5, 5, 6, 7, 7, 8, 8, 9, 10, 11, 11, 12, 13, 13, 14,
|
|
15, 15, 16, 17, 17, 18, 19, 19, 20, 21, 22, 22, 23, 24, 25, 26,
|
|
27, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40,
|
|
41, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51, 52, 52, 53,
|
|
54, 55, 55, 56, 57, 57, 58, 59, 59, 60, 60, 60, 61, 61, 61, 62,
|
|
};
|
|
|
|
static const uint8_t sf_delta_lut[78] = {
|
|
0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4,
|
|
4, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 10, 10, 11, 11, 12,
|
|
13, 13, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 21, 22, 22, 23,
|
|
23, 24, 24, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 27, 28,
|
|
28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 30,
|
|
};
|
|
|
|
static const uint8_t quant_lut[230] = {
|
|
0,
|
|
|
|
0, 1, 2,
|
|
|
|
0, 1, 2, 3, 4, 5, 6,
|
|
|
|
0, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11,
|
|
12, 13, 13, 13, 14,
|
|
|
|
0, 1, 1, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8,
|
|
8, 9, 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
|
|
22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 29,
|
|
30,
|
|
|
|
0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3,
|
|
4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9,
|
|
10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
|
|
15, 15, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 20, 20, 20,
|
|
21, 21, 22, 22, 23, 23, 24, 25, 26, 26, 27, 28, 29, 30, 31, 32,
|
|
33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 42, 43, 44, 44, 45, 45,
|
|
46, 47, 47, 48, 48, 49, 49, 50, 50, 50, 51, 51, 51, 52, 52, 52,
|
|
53, 53, 53, 54, 54, 54, 55, 55, 55, 56, 56, 56, 57, 57, 57, 57,
|
|
58, 58, 58, 58, 59, 59, 59, 59, 60, 60, 60, 60, 60, 61, 61, 61,
|
|
61, 61, 61, 61, 62,
|
|
};
|
|
|
|
static const float quant_lut_mul[7] = { 0.0, 0.0, 2.0, 2.0, 5.0, 12.0, 36.6 };
|
|
static const float quant_lut_add[7] = { 0.0, 0.0, 2.0, 7.0, 21.0, 56.0, 157.0 };
|
|
static const uint8_t quant_lut_offset[8] = { 0, 0, 1, 4, 11, 32, 81, 230 };
|
|
|
|
static void apply_mdct(NellyMoserEncodeContext *s)
|
|
{
|
|
float *in0 = s->buf;
|
|
float *in1 = s->buf + NELLY_BUF_LEN;
|
|
float *in2 = s->buf + 2 * NELLY_BUF_LEN;
|
|
|
|
s->fdsp->vector_fmul (s->in_buff, in0, ff_sine_128, NELLY_BUF_LEN);
|
|
s->fdsp->vector_fmul_reverse(s->in_buff + NELLY_BUF_LEN, in1, ff_sine_128, NELLY_BUF_LEN);
|
|
s->mdct_fn(s->mdct_ctx, s->mdct_out, s->in_buff, sizeof(float));
|
|
|
|
s->fdsp->vector_fmul (s->in_buff, in1, ff_sine_128, NELLY_BUF_LEN);
|
|
s->fdsp->vector_fmul_reverse(s->in_buff + NELLY_BUF_LEN, in2, ff_sine_128, NELLY_BUF_LEN);
|
|
s->mdct_fn(s->mdct_ctx, s->mdct_out + NELLY_BUF_LEN, s->in_buff, sizeof(float));
|
|
}
|
|
|
|
static av_cold int encode_end(AVCodecContext *avctx)
|
|
{
|
|
NellyMoserEncodeContext *s = avctx->priv_data;
|
|
|
|
av_tx_uninit(&s->mdct_ctx);
|
|
|
|
av_freep(&s->opt);
|
|
av_freep(&s->path);
|
|
ff_af_queue_close(&s->afq);
|
|
av_freep(&s->fdsp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void nellymoser_init_static(void)
|
|
{
|
|
/* faster way of doing
|
|
for (int i = 0; i < POW_TABLE_SIZE; i++)
|
|
pow_table[i] = 2^(-i / 2048.0 - 3.0 + POW_TABLE_OFFSET); */
|
|
pow_table[0] = 1;
|
|
pow_table[1024] = M_SQRT1_2;
|
|
for (int i = 1; i < 513; i++) {
|
|
double tmp = exp2(-i / 2048.0);
|
|
pow_table[i] = tmp;
|
|
pow_table[1024-i] = M_SQRT1_2 / tmp;
|
|
pow_table[1024+i] = tmp * M_SQRT1_2;
|
|
pow_table[2048-i] = 0.5 / tmp;
|
|
}
|
|
/* Generate overlap window */
|
|
ff_init_ff_sine_windows(7);
|
|
}
|
|
|
|
static av_cold int encode_init(AVCodecContext *avctx)
|
|
{
|
|
static AVOnce init_static_once = AV_ONCE_INIT;
|
|
NellyMoserEncodeContext *s = avctx->priv_data;
|
|
float scale = 32768.0;
|
|
int ret;
|
|
|
|
if (avctx->sample_rate != 8000 && avctx->sample_rate != 16000 &&
|
|
avctx->sample_rate != 11025 &&
|
|
avctx->sample_rate != 22050 && avctx->sample_rate != 44100 &&
|
|
avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
|
|
av_log(avctx, AV_LOG_ERROR, "Nellymoser works only with 8000, 16000, 11025, 22050 and 44100 sample rate\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
avctx->frame_size = NELLY_SAMPLES;
|
|
avctx->initial_padding = NELLY_BUF_LEN;
|
|
ff_af_queue_init(avctx, &s->afq);
|
|
s->avctx = avctx;
|
|
if ((ret = av_tx_init(&s->mdct_ctx, &s->mdct_fn, AV_TX_FLOAT_MDCT, 0, 128, &scale, 0)) < 0)
|
|
return ret;
|
|
s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
|
|
if (!s->fdsp)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (s->avctx->trellis) {
|
|
s->opt = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(float ));
|
|
s->path = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(uint8_t));
|
|
if (!s->opt || !s->path)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
ff_thread_once(&init_static_once, nellymoser_init_static);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define find_best(val, table, LUT, LUT_add, LUT_size) \
|
|
best_idx = \
|
|
LUT[av_clip ((lrintf(val) >> 8) + LUT_add, 0, LUT_size - 1)]; \
|
|
if (fabs(val - table[best_idx]) > fabs(val - table[best_idx + 1])) \
|
|
best_idx++;
|
|
|
|
static void get_exponent_greedy(NellyMoserEncodeContext *s, float *cand, int *idx_table)
|
|
{
|
|
int band, best_idx, power_idx = 0;
|
|
float power_candidate;
|
|
|
|
//base exponent
|
|
find_best(cand[0], ff_nelly_init_table, sf_lut, -20, 96);
|
|
idx_table[0] = best_idx;
|
|
power_idx = ff_nelly_init_table[best_idx];
|
|
|
|
for (band = 1; band < NELLY_BANDS; band++) {
|
|
power_candidate = cand[band] - power_idx;
|
|
find_best(power_candidate, ff_nelly_delta_table, sf_delta_lut, 37, 78);
|
|
idx_table[band] = best_idx;
|
|
power_idx += ff_nelly_delta_table[best_idx];
|
|
}
|
|
}
|
|
|
|
static inline float distance(float x, float y, int band)
|
|
{
|
|
//return pow(fabs(x-y), 2.0);
|
|
float tmp = x - y;
|
|
return tmp * tmp;
|
|
}
|
|
|
|
static void get_exponent_dynamic(NellyMoserEncodeContext *s, float *cand, int *idx_table)
|
|
{
|
|
int i, j, band, best_idx;
|
|
float power_candidate, best_val;
|
|
|
|
float (*opt )[OPT_SIZE] = s->opt ;
|
|
uint8_t(*path)[OPT_SIZE] = s->path;
|
|
|
|
for (i = 0; i < NELLY_BANDS * OPT_SIZE; i++) {
|
|
opt[0][i] = INFINITY;
|
|
}
|
|
|
|
for (i = 0; i < 64; i++) {
|
|
opt[0][ff_nelly_init_table[i]] = distance(cand[0], ff_nelly_init_table[i], 0);
|
|
path[0][ff_nelly_init_table[i]] = i;
|
|
}
|
|
|
|
for (band = 1; band < NELLY_BANDS; band++) {
|
|
int q, c = 0;
|
|
float tmp;
|
|
int idx_min, idx_max, idx;
|
|
power_candidate = cand[band];
|
|
for (q = 1000; !c && q < OPT_SIZE; q <<= 2) {
|
|
idx_min = FFMAX(0, cand[band] - q);
|
|
idx_max = FFMIN(OPT_SIZE, cand[band - 1] + q);
|
|
for (i = FFMAX(0, cand[band - 1] - q); i < FFMIN(OPT_SIZE, cand[band - 1] + q); i++) {
|
|
if ( isinf(opt[band - 1][i]) )
|
|
continue;
|
|
for (j = 0; j < 32; j++) {
|
|
idx = i + ff_nelly_delta_table[j];
|
|
if (idx > idx_max)
|
|
break;
|
|
if (idx >= idx_min) {
|
|
tmp = opt[band - 1][i] + distance(idx, power_candidate, band);
|
|
if (opt[band][idx] > tmp) {
|
|
opt[band][idx] = tmp;
|
|
path[band][idx] = j;
|
|
c = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
av_assert1(c); //FIXME
|
|
}
|
|
|
|
best_val = INFINITY;
|
|
best_idx = -1;
|
|
band = NELLY_BANDS - 1;
|
|
for (i = 0; i < OPT_SIZE; i++) {
|
|
if (best_val > opt[band][i]) {
|
|
best_val = opt[band][i];
|
|
best_idx = i;
|
|
}
|
|
}
|
|
for (band = NELLY_BANDS - 1; band >= 0; band--) {
|
|
idx_table[band] = path[band][best_idx];
|
|
if (band) {
|
|
best_idx -= ff_nelly_delta_table[path[band][best_idx]];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Encode NELLY_SAMPLES samples. It assumes, that samples contains 3 * NELLY_BUF_LEN values
|
|
* @param s encoder context
|
|
* @param output output buffer
|
|
* @param output_size size of output buffer
|
|
*/
|
|
static void encode_block(NellyMoserEncodeContext *s, unsigned char *output, int output_size)
|
|
{
|
|
PutBitContext pb;
|
|
int i, j, band, block, best_idx, power_idx = 0;
|
|
float power_val, coeff, coeff_sum;
|
|
float pows[NELLY_FILL_LEN];
|
|
int bits[NELLY_BUF_LEN], idx_table[NELLY_BANDS];
|
|
float cand[NELLY_BANDS];
|
|
|
|
apply_mdct(s);
|
|
|
|
init_put_bits(&pb, output, output_size);
|
|
|
|
i = 0;
|
|
for (band = 0; band < NELLY_BANDS; band++) {
|
|
coeff_sum = 0;
|
|
for (j = 0; j < ff_nelly_band_sizes_table[band]; i++, j++) {
|
|
coeff_sum += s->mdct_out[i ] * s->mdct_out[i ]
|
|
+ s->mdct_out[i + NELLY_BUF_LEN] * s->mdct_out[i + NELLY_BUF_LEN];
|
|
}
|
|
cand[band] =
|
|
log2(FFMAX(1.0, coeff_sum / (ff_nelly_band_sizes_table[band] << 7))) * 1024.0;
|
|
}
|
|
|
|
if (s->avctx->trellis) {
|
|
get_exponent_dynamic(s, cand, idx_table);
|
|
} else {
|
|
get_exponent_greedy(s, cand, idx_table);
|
|
}
|
|
|
|
i = 0;
|
|
for (band = 0; band < NELLY_BANDS; band++) {
|
|
if (band) {
|
|
power_idx += ff_nelly_delta_table[idx_table[band]];
|
|
put_bits(&pb, 5, idx_table[band]);
|
|
} else {
|
|
power_idx = ff_nelly_init_table[idx_table[0]];
|
|
put_bits(&pb, 6, idx_table[0]);
|
|
}
|
|
power_val = pow_table[power_idx & 0x7FF] / (1 << ((power_idx >> 11) + POW_TABLE_OFFSET));
|
|
for (j = 0; j < ff_nelly_band_sizes_table[band]; i++, j++) {
|
|
s->mdct_out[i] *= power_val;
|
|
s->mdct_out[i + NELLY_BUF_LEN] *= power_val;
|
|
pows[i] = power_idx;
|
|
}
|
|
}
|
|
|
|
ff_nelly_get_sample_bits(pows, bits);
|
|
|
|
for (block = 0; block < 2; block++) {
|
|
for (i = 0; i < NELLY_FILL_LEN; i++) {
|
|
if (bits[i] > 0) {
|
|
const float *table = ff_nelly_dequantization_table + (1 << bits[i]) - 1;
|
|
coeff = s->mdct_out[block * NELLY_BUF_LEN + i];
|
|
best_idx =
|
|
quant_lut[av_clip (
|
|
coeff * quant_lut_mul[bits[i]] + quant_lut_add[bits[i]],
|
|
quant_lut_offset[bits[i]],
|
|
quant_lut_offset[bits[i]+1] - 1
|
|
)];
|
|
if (fabs(coeff - table[best_idx]) > fabs(coeff - table[best_idx + 1]))
|
|
best_idx++;
|
|
|
|
put_bits(&pb, bits[i], best_idx);
|
|
}
|
|
}
|
|
if (!block)
|
|
put_bits(&pb, NELLY_HEADER_BITS + NELLY_DETAIL_BITS - put_bits_count(&pb), 0);
|
|
}
|
|
|
|
flush_put_bits(&pb);
|
|
memset(put_bits_ptr(&pb), 0, output + output_size - put_bits_ptr(&pb));
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr)
|
|
{
|
|
NellyMoserEncodeContext *s = avctx->priv_data;
|
|
int ret;
|
|
|
|
if (s->last_frame)
|
|
return 0;
|
|
|
|
memcpy(s->buf, s->buf + NELLY_SAMPLES, NELLY_BUF_LEN * sizeof(*s->buf));
|
|
if (frame) {
|
|
memcpy(s->buf + NELLY_BUF_LEN, frame->data[0],
|
|
frame->nb_samples * sizeof(*s->buf));
|
|
if (frame->nb_samples < NELLY_SAMPLES) {
|
|
memset(s->buf + NELLY_BUF_LEN + frame->nb_samples, 0,
|
|
(NELLY_SAMPLES - frame->nb_samples) * sizeof(*s->buf));
|
|
if (frame->nb_samples >= NELLY_BUF_LEN)
|
|
s->last_frame = 1;
|
|
}
|
|
if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
|
|
return ret;
|
|
} else {
|
|
memset(s->buf + NELLY_BUF_LEN, 0, NELLY_SAMPLES * sizeof(*s->buf));
|
|
s->last_frame = 1;
|
|
}
|
|
|
|
if ((ret = ff_get_encode_buffer(avctx, avpkt, NELLY_BLOCK_LEN, 0)) < 0)
|
|
return ret;
|
|
encode_block(s, avpkt->data, avpkt->size);
|
|
|
|
/* Get the next frame pts/duration */
|
|
ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
|
|
&avpkt->duration);
|
|
|
|
*got_packet_ptr = 1;
|
|
return 0;
|
|
}
|
|
|
|
const FFCodec ff_nellymoser_encoder = {
|
|
.p.name = "nellymoser",
|
|
CODEC_LONG_NAME("Nellymoser Asao"),
|
|
.p.type = AVMEDIA_TYPE_AUDIO,
|
|
.p.id = AV_CODEC_ID_NELLYMOSER,
|
|
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
|
|
AV_CODEC_CAP_SMALL_LAST_FRAME,
|
|
.priv_data_size = sizeof(NellyMoserEncodeContext),
|
|
.init = encode_init,
|
|
FF_CODEC_ENCODE_CB(encode_frame),
|
|
.close = encode_end,
|
|
.p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLT,
|
|
AV_SAMPLE_FMT_NONE },
|
|
.p.ch_layouts = (const AVChannelLayout[]){ AV_CHANNEL_LAYOUT_MONO, { 0 } },
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|