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lq_mixer.c
5797 lines (5108 loc) · 373 KB
/
lq_mixer.c
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/*
* Sequencer low quality integer mixer
* Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.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
*/
/**
* @file
* Sequencer low quality integer mixer.
*/
#include "libavcodec/avcodec.h"
#include "libavutil/avstring.h"
#include "libavsequencer/mixer.h"
typedef struct AV_LQMixerData {
AVMixerData mixer_data;
int32_t *buf;
int32_t *filter_buf;
uint32_t buf_size;
uint32_t mix_buf_size;
int32_t *volume_lut;
struct AV_LQMixerChannelInfo *channel_info;
uint32_t amplify;
uint32_t mix_rate;
uint32_t mix_rate_frac;
uint32_t current_left;
uint32_t current_left_frac;
uint32_t pass_len;
uint32_t pass_len_frac;
uint16_t channels_in;
uint16_t channels_out;
uint8_t interpolation;
uint8_t real_16_bit_mode;
} AV_LQMixerData;
typedef struct AV_LQMixerChannelInfo {
struct ChannelBlock {
const int16_t *data;
uint32_t len;
uint32_t offset;
uint32_t fraction;
uint32_t offset_one_shoot;
uint32_t advance;
uint32_t advance_frac;
void (*mix_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len);
uint32_t end_offset;
uint32_t restart_offset;
uint32_t repeat;
uint32_t repeat_len;
uint32_t count_restart;
uint32_t counted;
uint32_t rate;
int32_t *volume_left_lut;
int32_t *volume_right_lut;
uint32_t mult_left_volume;
uint32_t mult_right_volume;
int32_t filter_c1;
int32_t filter_c2;
int32_t filter_c3;
void (*mix_backwards_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len);
uint8_t bits_per_sample;
uint8_t flags;
uint8_t volume;
uint8_t panning;
uint16_t filter_cutoff;
uint16_t filter_damping;
} current;
struct ChannelBlock next;
int32_t filter_tmp1;
int32_t filter_tmp2;
} AV_LQMixerChannelInfo;
#if CONFIG_LOW_QUALITY_MIXER
static const char *low_quality_mixer_name(void *p)
{
AVMixerContext *mixctx = p;
return mixctx->name;
}
static const AVClass avseq_low_quality_mixer_class = {
"AVSequencer Low Quality Mixer",
low_quality_mixer_name,
NULL,
LIBAVUTIL_VERSION_INT,
};
static void apply_filter(AV_LQMixerChannelInfo *const channel_info,
struct ChannelBlock *const channel_block,
int32_t **const dest_buf,
const int32_t *src_buf,
const uint32_t len)
{
int32_t *mix_buf = *dest_buf;
uint32_t i = len >> 2;
const int64_t c1 = channel_block->filter_c1;
const int64_t c2 = channel_block->filter_c2;
const int64_t c3 = channel_block->filter_c3;
int32_t o1 = channel_info->filter_tmp2;
int32_t o2 = channel_info->filter_tmp1;
int32_t o3, o4;
while (i--) {
mix_buf[0] += o3 = ((c1 * src_buf[0]) + (c2 * o2) + (c3 * o1)) >> 24;
mix_buf[1] += o4 = ((c1 * src_buf[1]) + (c2 * o3) + (c3 * o2)) >> 24;
mix_buf[2] += o1 = ((c1 * src_buf[2]) + (c2 * o4) + (c3 * o3)) >> 24;
mix_buf[3] += o2 = ((c1 * src_buf[3]) + (c2 * o1) + (c3 * o4)) >> 24;
src_buf += 4;
mix_buf += 4;
}
i = len & 3;
while (i--) {
*mix_buf++ += o3 = ((c1 * *src_buf++) + (c2 * o2) + (c3 * o1)) >> 24;
o1 = o2;
o2 = o3;
}
*dest_buf = mix_buf;
channel_info->filter_tmp1 = o2;
channel_info->filter_tmp2 = o1;
}
static void mix_sample(AV_LQMixerData *const mixer_data,
int32_t *const buf, const uint32_t len)
{
AV_LQMixerChannelInfo *channel_info = mixer_data->channel_info;
uint16_t i = mixer_data->channels_in;
do {
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_PLAY) {
void (*mix_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len) = channel_info->current.mix_func;
int32_t *mix_buf = buf;
uint32_t offset = channel_info->current.offset;
uint32_t fraction = channel_info->current.fraction;
const uint32_t advance = channel_info->current.advance;
const uint32_t adv_frac = channel_info->current.advance_frac;
uint32_t remain_len = len, remain_mix;
uint64_t calc_mix;
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_BACKWARDS) {
mix_sample_backwards:
for (;;) {
calc_mix = (((((uint64_t) advance << 32) + adv_frac) * remain_len) + fraction) >> 32;
if ((int32_t) (remain_mix = offset - channel_info->current.end_offset) > 0) {
if ((uint32_t) calc_mix < remain_mix) {
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, remain_len);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = remain_len;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, remain_len);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if ((int32_t) offset <= (int32_t) channel_info->current.end_offset)
remain_len = 0;
else
break;
} else {
calc_mix = (((((uint64_t) remain_mix << 32) - fraction) - 1) / (((uint64_t) advance << 32) + adv_frac) + 1);
remain_len -= (uint32_t) calc_mix;
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = (uint32_t) calc_mix;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if (((int32_t) offset > (int32_t) channel_info->current.end_offset) && !remain_len)
break;
}
}
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_LOOP) {
const uint32_t count_restart = channel_info->current.count_restart;
const uint32_t counted = channel_info->current.counted++;
if (count_restart && (count_restart == counted)) {
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_LOOP;
channel_info->current.end_offset = -1;
goto mix_sample_synth;
} else {
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_PINGPONG) {
void (*mixer_change_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len);
if (channel_info->next.data) {
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
}
mixer_change_func = channel_info->current.mix_backwards_func;
channel_info->current.mix_backwards_func = mix_func;
mix_func = mixer_change_func;
channel_info->current.mix_func = mix_func;
channel_info->current.flags ^= AVSEQ_MIXER_CHANNEL_FLAG_BACKWARDS;
remain_mix = channel_info->current.end_offset;
offset -= remain_mix;
offset = -offset + remain_mix;
remain_mix += channel_info->current.restart_offset;
channel_info->current.end_offset = remain_mix;
if ((int32_t) remain_len > 0)
goto mix_sample_forwards;
break;
} else {
offset += channel_info->current.restart_offset;
if (channel_info->next.data)
goto mix_sample_synth;
if ((int32_t) remain_len > 0)
continue;
break;
}
}
} else {
if (channel_info->next.data)
goto mix_sample_synth;
else
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_PLAY;
break;
}
}
} else {
mix_sample_forwards:
for (;;) {
calc_mix = (((((uint64_t) advance << 32) + adv_frac) * remain_len) + fraction) >> 32;
if ((int32_t) (remain_mix = channel_info->current.end_offset - offset) > 0) {
if ((uint32_t) calc_mix < remain_mix) {
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, remain_len);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = remain_len;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, remain_len);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if (offset >= channel_info->current.end_offset)
remain_len = 0;
else
break;
} else {
calc_mix = (((((uint64_t) remain_mix << 32) - fraction) - 1) / (((uint64_t) advance << 32) + adv_frac) + 1);
remain_len -= (uint32_t) calc_mix;
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = (uint32_t) calc_mix;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if ((offset < channel_info->current.end_offset) && !remain_len)
break;
}
}
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_LOOP) {
const uint32_t count_restart = channel_info->current.count_restart;
const uint32_t counted = channel_info->current.counted++;
if (count_restart && (count_restart == counted)) {
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_LOOP;
channel_info->current.end_offset = channel_info->current.len;
goto mix_sample_synth;
} else {
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_PINGPONG) {
void (*mixer_change_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len);
if (channel_info->next.data) {
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
}
mixer_change_func = channel_info->current.mix_backwards_func;
channel_info->current.mix_backwards_func = mix_func;
mix_func = mixer_change_func;
channel_info->current.mix_func = mix_func;
channel_info->current.flags ^= AVSEQ_MIXER_CHANNEL_FLAG_BACKWARDS;
remain_mix = channel_info->current.end_offset;
offset -= remain_mix;
offset = -offset + remain_mix;
remain_mix -= channel_info->current.restart_offset;
channel_info->current.end_offset = remain_mix;
if (remain_len)
goto mix_sample_backwards;
break;
} else {
offset -= channel_info->current.restart_offset;
if (channel_info->next.data) {
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
}
if ((int32_t) remain_len > 0)
continue;
break;
}
}
} else {
if (channel_info->next.data) {
mix_sample_synth:
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
if ((int32_t) remain_len > 0)
continue;
} else {
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_PLAY;
}
break;
}
}
}
channel_info->current.offset_one_shoot += (offset > channel_info->current.offset) ? (offset - channel_info->current.offset) : (channel_info->current.offset - offset);
if (channel_info->current.offset_one_shoot >= channel_info->current.len) {
channel_info->current.offset_one_shoot = channel_info->current.len;
if (!(channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_LOOP))
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_PLAY;
}
channel_info->current.offset = offset;
channel_info->current.fraction = fraction;
}
channel_info++;
} while (--i);
}
static void mix_sample_parallel(AV_LQMixerData *const mixer_data,
int32_t *const buf,
const uint32_t len,
const uint32_t first_channel,
const uint32_t last_channel)
{
AV_LQMixerChannelInfo *channel_info = mixer_data->channel_info + first_channel;
uint16_t i = (last_channel - first_channel) + 1;
do {
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_PLAY) {
void (*mix_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len) = channel_info->current.mix_func;
int32_t *mix_buf = buf;
uint32_t offset = channel_info->current.offset;
uint32_t fraction = channel_info->current.fraction;
const uint32_t advance = channel_info->current.advance;
const uint32_t adv_frac = channel_info->current.advance_frac;
uint32_t remain_len = len, remain_mix;
uint64_t calc_mix;
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_BACKWARDS) {
mix_sample_backwards:
for (;;) {
calc_mix = (((((uint64_t) advance << 32) + adv_frac) * remain_len) + fraction) >> 32;
if ((int32_t) (remain_mix = offset - channel_info->current.end_offset) > 0) {
if ((uint32_t) calc_mix < remain_mix) {
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, remain_len);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = remain_len;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, remain_len);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if ((int32_t) offset <= (int32_t) channel_info->current.end_offset)
remain_len = 0;
else
break;
} else {
calc_mix = (((((uint64_t) remain_mix << 32) - fraction) - 1) / (((uint64_t) advance << 32) + adv_frac) + 1);
remain_len -= (uint32_t) calc_mix;
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = (uint32_t) calc_mix;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if (((int32_t) offset > (int32_t) channel_info->current.end_offset) && !remain_len)
break;
}
}
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_LOOP) {
const uint32_t count_restart = channel_info->current.count_restart;
const uint32_t counted = channel_info->current.counted++;
if (count_restart && (count_restart == counted)) {
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_LOOP;
channel_info->current.end_offset = -1;
goto mix_sample_synth;
} else {
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_PINGPONG) {
void (*mixer_change_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len);
if (channel_info->next.data) {
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
}
mixer_change_func = channel_info->current.mix_backwards_func;
channel_info->current.mix_backwards_func = mix_func;
mix_func = mixer_change_func;
channel_info->current.mix_func = mix_func;
channel_info->current.flags ^= AVSEQ_MIXER_CHANNEL_FLAG_BACKWARDS;
remain_mix = channel_info->current.end_offset;
offset -= remain_mix;
offset = -offset + remain_mix;
remain_mix += channel_info->current.restart_offset;
channel_info->current.end_offset = remain_mix;
if ((int32_t) remain_len > 0)
goto mix_sample_forwards;
break;
} else {
offset += channel_info->current.restart_offset;
if (channel_info->next.data)
goto mix_sample_synth;
if ((int32_t) remain_len > 0)
continue;
break;
}
}
} else {
if (channel_info->next.data)
goto mix_sample_synth;
else
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_PLAY;
break;
}
}
} else {
mix_sample_forwards:
for (;;) {
calc_mix = (((((uint64_t) advance << 32) + adv_frac) * remain_len) + fraction) >> 32;
if ((int32_t) (remain_mix = channel_info->current.end_offset - offset) > 0) {
if ((uint32_t) calc_mix < remain_mix) {
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, remain_len);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = remain_len;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, remain_len);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if (offset >= channel_info->current.end_offset)
remain_len = 0;
else
break;
} else {
calc_mix = (((((uint64_t) remain_mix << 32) - fraction) - 1) / (((uint64_t) advance << 32) + adv_frac) + 1);
remain_len -= (uint32_t) calc_mix;
if ((channel_info->current.filter_cutoff == 4095) && (channel_info->current.filter_damping == 0)) {
mix_func(mixer_data, &channel_info->current, &mix_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
} else {
int32_t *filter_buf = mixer_data->filter_buf;
uint32_t filter_len = (uint32_t) calc_mix;
if (mixer_data->channels_out >= 2)
filter_len <<= 1;
memset(filter_buf, 0, filter_len * sizeof(int32_t));
mix_func(mixer_data, &channel_info->current, &filter_buf, &offset, &fraction, advance, adv_frac, (uint32_t) calc_mix);
apply_filter(channel_info, &channel_info->current, &mix_buf, mixer_data->filter_buf, filter_len);
}
if ((offset < channel_info->current.end_offset) && !remain_len)
break;
}
}
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_LOOP) {
const uint32_t count_restart = channel_info->current.count_restart;
const uint32_t counted = channel_info->current.counted++;
if (count_restart && (count_restart == counted)) {
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_LOOP;
channel_info->current.end_offset = channel_info->current.len;
goto mix_sample_synth;
} else {
if (channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_PINGPONG) {
void (*mixer_change_func)(const AV_LQMixerData *const mixer_data,
const struct ChannelBlock *const channel_block,
int32_t **const buf,
uint32_t *const offset,
uint32_t *const fraction,
const uint32_t advance,
const uint32_t adv_frac,
const uint32_t len);
if (channel_info->next.data) {
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
}
mixer_change_func = channel_info->current.mix_backwards_func;
channel_info->current.mix_backwards_func = mix_func;
mix_func = mixer_change_func;
channel_info->current.mix_func = mix_func;
channel_info->current.flags ^= AVSEQ_MIXER_CHANNEL_FLAG_BACKWARDS;
remain_mix = channel_info->current.end_offset;
offset -= remain_mix;
offset = -offset + remain_mix;
remain_mix -= channel_info->current.restart_offset;
channel_info->current.end_offset = remain_mix;
if (remain_len)
goto mix_sample_backwards;
break;
} else {
offset -= channel_info->current.restart_offset;
if (channel_info->next.data) {
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
}
if ((int32_t) remain_len > 0)
continue;
break;
}
}
} else {
if (channel_info->next.data) {
mix_sample_synth:
memcpy(&channel_info->current, &channel_info->next, sizeof(struct ChannelBlock));
channel_info->next.data = NULL;
if ((int32_t) remain_len > 0)
continue;
} else {
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_PLAY;
}
break;
}
}
}
channel_info->current.offset_one_shoot += (offset > channel_info->current.offset) ? (offset - channel_info->current.offset) : (channel_info->current.offset - offset);
if (channel_info->current.offset_one_shoot >= channel_info->current.len) {
channel_info->current.offset_one_shoot = channel_info->current.len;
if (!(channel_info->current.flags & AVSEQ_MIXER_CHANNEL_FLAG_LOOP))
channel_info->current.flags &= ~AVSEQ_MIXER_CHANNEL_FLAG_PLAY;
}
channel_info->current.offset = offset;
channel_info->current.fraction = fraction;
}
channel_info++;
} while (--i);
}
#define MIX_FUNCTION(INIT, TYPE, OP, OFFSET_START, OFFSET_END, SKIP, \
NEXTS, NEXTA, NEXTI, SHIFTS, SHIFTN, SHIFTB) \
const TYPE *sample = (const TYPE *) channel_block->data; \
int32_t *mix_buf = *buf; \
uint32_t curr_offset = *offset; \
uint32_t curr_frac = *fraction; \
uint32_t i; \
INIT; \
\
if (advance) { \
if (mixer_data->interpolation) { \
int32_t smp; \
int32_t interpolate_div; \
\
OFFSET_START; \
i = (len >> 1) + 1; \
\
if (len & 1) \
goto get_second_advance_interpolated_sample; \
\
i--; \
\
do { \
uint32_t interpolate_offset; \
\
curr_frac += adv_frac; \
interpolate_offset = advance + (curr_frac < adv_frac); \
smp = 0; \
interpolate_div = 0; \
\
do { \
NEXTA; \
interpolate_div++; \
} while (--interpolate_offset); \
\
smp /= interpolate_div; \
SHIFTS; \
get_second_advance_interpolated_sample: \
curr_frac += adv_frac; \
interpolate_offset = advance + (curr_frac < adv_frac); \
smp = 0; \
interpolate_div = 0; \
\
do { \
NEXTA; \
interpolate_div++; \
} while (--interpolate_offset); \
\
smp /= interpolate_div; \
SHIFTS; \
} while (--i); \
\
*buf = mix_buf; \
OFFSET_END; \
*fraction = curr_frac; \
} else { \
i = (len >> 1) + 1; \
\
if (len & 1) \
goto get_second_advance_sample; \
\
i--; \
\
do { \
SKIP; \
curr_frac += adv_frac; \
curr_offset OP advance + (curr_frac < adv_frac); \
get_second_advance_sample: \
SKIP; \
curr_frac += adv_frac; \
curr_offset OP advance + (curr_frac < adv_frac); \
} while (--i); \
\
*buf = mix_buf; \
*offset = curr_offset; \
*fraction = curr_frac; \
} \
} else { \
int32_t smp; \
\
if (mixer_data->interpolation > 1) { \
uint32_t interpolate_frac, interpolate_count; \
int32_t interpolate_div; \
int64_t smp_value; \
\
OFFSET_START; \
NEXTS; \
smp_value = 0; \
\
if (len > 1) { \
NEXTI; \
} \
\
interpolate_div = smp_value >> 32; \
interpolate_frac = smp_value; \
interpolate_count = 0; \
\
i = (len >> 1) + 1; \
\
if (len & 1) \
goto get_second_interpolated_sample; \
\
i--; \
\
do { \
SHIFTS; \
curr_frac += adv_frac; \
\
if (curr_frac < adv_frac) { \
NEXTS; \
NEXTI; \
\
interpolate_div = smp_value >> 32; \
interpolate_frac = smp_value; \
interpolate_count = 0; \
} else { \
smp += interpolate_div; \
interpolate_count += interpolate_frac; \
\
if (interpolate_count < interpolate_frac) { \
smp++; \
\
if (interpolate_div < 0) \
smp -= 2; \
} \
} \
get_second_interpolated_sample: \
SHIFTS; \
curr_frac += adv_frac; \
\
if (curr_frac < adv_frac) { \
NEXTS; \
smp_value = 0; \
\
if (i > 1) { \
NEXTI; \
} \
\
interpolate_div = smp_value >> 32; \
interpolate_frac = smp_value; \
interpolate_count = 0; \
} else { \
smp += interpolate_div; \
interpolate_count += interpolate_frac; \
\
if (interpolate_count < interpolate_frac) { \
smp++; \
\
if (interpolate_div < 0) \
smp -= 2; \
} \
} \
} while (--i); \
\
*buf = mix_buf; \
OFFSET_END; \
*fraction = curr_frac; \
} else { \
OFFSET_START; \
SHIFTN; \
i = (len >> 1) + 1; \
\
if (len & 1) \
goto get_second_sample; \
\
i--; \
\
do { \
SHIFTB; \
curr_frac += adv_frac; \
\
if (curr_frac < adv_frac) { \
SHIFTN; \
} \
get_second_sample: \
SHIFTB; \
curr_frac += adv_frac; \
\
if (curr_frac < adv_frac) { \
SHIFTN; \
} \
} while (--i); \
\
*buf = mix_buf; \
OFFSET_END; \
*fraction = curr_frac; \
} \
}
#define MIX(type) \
static void mix_##type(const AV_LQMixerData *const mixer_data, \
const struct ChannelBlock *const channel_block, \
int32_t **const buf, uint32_t *const offset, uint32_t *const fraction, \
const uint32_t advance, const uint32_t adv_frac, const uint32_t len)
MIX(skip)
{
uint32_t curr_offset = *offset, curr_frac = *fraction, skip_frac;
const uint64_t skip_len = (((uint64_t) advance << 32) + adv_frac) * len;
curr_offset += skip_len >> 32;
skip_frac = skip_len;
curr_frac += skip_frac;
curr_offset += (curr_frac < skip_frac);
*offset = curr_offset;
*fraction = curr_frac;
}
MIX(skip_backwards)
{
uint32_t curr_offset = *offset, curr_frac = *fraction, skip_frac;
const uint64_t skip_len = (((uint64_t) advance << 32) + adv_frac) * len;
curr_offset -= skip_len >> 32;
skip_frac = skip_len;
curr_frac += skip_frac;
curr_offset -= (curr_frac < skip_frac);
*offset = curr_offset;
*fraction = curr_frac;
}
MIX(mono_8)
{
MIX_FUNCTION(const int32_t *const volume_lut = channel_block->volume_left_lut; const int8_t *const pos = sample,
int8_t, +=,
sample += curr_offset,
*offset = (sample - pos) - 1,
*mix_buf++ += volume_lut[(uint8_t) sample[curr_offset]],
smp = *sample++,
smp += *sample++,
smp_value = (*sample - smp) * (int64_t) adv_frac,
*mix_buf++ += volume_lut[(uint8_t) smp],
smp = volume_lut[(uint8_t) *sample++],
*mix_buf++ += smp)
}
MIX(mono_backwards_8)
{
MIX_FUNCTION(const int32_t *const volume_lut = channel_block->volume_left_lut; const int8_t *const pos = sample,
int8_t, -=,
sample += curr_offset,
*offset = (sample - pos) - 1,
*mix_buf++ += volume_lut[(uint8_t) sample[curr_offset]],
smp = *--sample,
smp += *--sample,
smp_value = (*(sample-1) - smp) * (int64_t) adv_frac,
*mix_buf++ += volume_lut[(uint8_t) smp],
smp = volume_lut[(uint8_t) *--sample],
*mix_buf++ += smp)
}
MIX(mono_16_to_8)
{
MIX_FUNCTION(const int32_t *const volume_lut = channel_block->volume_left_lut; const int16_t *const pos = sample,
int16_t, +=,
sample += curr_offset,
*offset = (sample - pos) - 1,
*mix_buf++ += volume_lut[(uint16_t) sample[curr_offset] >> 8],
smp = *sample++,
smp += *sample++,
smp_value = (*sample - smp) * (int64_t) adv_frac,
*mix_buf++ += volume_lut[(uint16_t) smp >> 8],
smp = volume_lut[(uint16_t) *sample++ >> 8],
*mix_buf++ += smp)
}
MIX(mono_backwards_16_to_8)
{
MIX_FUNCTION(const int32_t *const volume_lut = channel_block->volume_left_lut; const int16_t *const pos = sample,
int16_t, -=,
sample += curr_offset,
*offset = (sample - pos) - 1,
*mix_buf++ += volume_lut[(uint16_t) sample[curr_offset] >> 8],
smp = *--sample,
smp += *--sample,
smp_value = (*(sample-1) - smp) * (int64_t) adv_frac,
*mix_buf++ += volume_lut[(uint16_t) smp >> 8],
smp = volume_lut[(uint16_t) *--sample >> 8],
*mix_buf++ += smp)
}
MIX(mono_32_to_8)
{
MIX_FUNCTION(const int32_t *const volume_lut = channel_block->volume_left_lut; const int32_t *const pos = sample,
int32_t, +=,
sample += curr_offset,
*offset = (sample - pos) - 1,
*mix_buf++ += volume_lut[(uint32_t) sample[curr_offset] >> 24],
smp = *sample++,
smp += *sample++,
smp_value = (*sample - smp) * (int64_t) adv_frac,
*mix_buf++ += volume_lut[(uint32_t) smp >> 24],
smp = volume_lut[(uint32_t) *sample++ >> 24],
*mix_buf++ += smp)
}
MIX(mono_backwards_32_to_8)