e6f0bb6527
Cleanup by Diego Biurrun. Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>
388 lines
15 KiB
C
388 lines
15 KiB
C
/*
|
|
* ATRAC3+ compatible decoder
|
|
*
|
|
* Copyright (c) 2010-2013 Maxim Poliakovski
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Sony ATRAC3+ compatible decoder.
|
|
*
|
|
* Container formats used to store its data:
|
|
* RIFF WAV (.at3) and Sony OpenMG (.oma, .aa3).
|
|
*
|
|
* Technical description of this codec can be found here:
|
|
* http://wiki.multimedia.cx/index.php?title=ATRAC3plus
|
|
*
|
|
* Kudos to Benjamin Larsson and Michael Karcher
|
|
* for their precious technical help!
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/float_dsp.h"
|
|
#include "avcodec.h"
|
|
#include "get_bits.h"
|
|
#include "internal.h"
|
|
#include "atrac.h"
|
|
#include "atrac3plus.h"
|
|
|
|
typedef struct ATRAC3PContext {
|
|
GetBitContext gb;
|
|
AVFloatDSPContext fdsp;
|
|
|
|
DECLARE_ALIGNED(32, float, samples)[2][ATRAC3P_FRAME_SAMPLES]; ///< quantized MDCT spectrum
|
|
DECLARE_ALIGNED(32, float, mdct_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the IMDCT
|
|
DECLARE_ALIGNED(32, float, time_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the gain compensation
|
|
DECLARE_ALIGNED(32, float, outp_buf)[2][ATRAC3P_FRAME_SAMPLES];
|
|
|
|
AtracGCContext gainc_ctx; ///< gain compensation context
|
|
FFTContext mdct_ctx;
|
|
FFTContext ipqf_dct_ctx; ///< IDCT context used by IPQF
|
|
|
|
Atrac3pChanUnitCtx *ch_units; ///< global channel units
|
|
|
|
int num_channel_blocks; ///< number of channel blocks
|
|
uint8_t channel_blocks[5]; ///< channel configuration descriptor
|
|
uint64_t my_channel_layout; ///< current channel layout
|
|
} ATRAC3PContext;
|
|
|
|
static av_cold int atrac3p_decode_close(AVCodecContext *avctx)
|
|
{
|
|
av_free(((ATRAC3PContext *)(avctx->priv_data))->ch_units);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int set_channel_params(ATRAC3PContext *ctx,
|
|
AVCodecContext *avctx)
|
|
{
|
|
memset(ctx->channel_blocks, 0, sizeof(ctx->channel_blocks));
|
|
|
|
switch (avctx->channel_layout) {
|
|
case AV_CH_FRONT_LEFT:
|
|
case AV_CH_LAYOUT_MONO:
|
|
ctx->num_channel_blocks = 1;
|
|
ctx->channel_blocks[0] = CH_UNIT_MONO;
|
|
break;
|
|
case AV_CH_LAYOUT_STEREO:
|
|
ctx->num_channel_blocks = 1;
|
|
ctx->channel_blocks[0] = CH_UNIT_STEREO;
|
|
break;
|
|
case AV_CH_LAYOUT_SURROUND:
|
|
ctx->num_channel_blocks = 2;
|
|
ctx->channel_blocks[0] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[1] = CH_UNIT_MONO;
|
|
break;
|
|
case AV_CH_LAYOUT_4POINT0:
|
|
ctx->num_channel_blocks = 3;
|
|
ctx->channel_blocks[0] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[1] = CH_UNIT_MONO;
|
|
ctx->channel_blocks[2] = CH_UNIT_MONO;
|
|
break;
|
|
case AV_CH_LAYOUT_5POINT1_BACK:
|
|
ctx->num_channel_blocks = 4;
|
|
ctx->channel_blocks[0] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[1] = CH_UNIT_MONO;
|
|
ctx->channel_blocks[2] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[3] = CH_UNIT_MONO;
|
|
break;
|
|
case AV_CH_LAYOUT_6POINT1_BACK:
|
|
ctx->num_channel_blocks = 5;
|
|
ctx->channel_blocks[0] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[1] = CH_UNIT_MONO;
|
|
ctx->channel_blocks[2] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[3] = CH_UNIT_MONO;
|
|
ctx->channel_blocks[4] = CH_UNIT_MONO;
|
|
break;
|
|
case AV_CH_LAYOUT_7POINT1:
|
|
ctx->num_channel_blocks = 5;
|
|
ctx->channel_blocks[0] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[1] = CH_UNIT_MONO;
|
|
ctx->channel_blocks[2] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[3] = CH_UNIT_STEREO;
|
|
ctx->channel_blocks[4] = CH_UNIT_MONO;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Unsupported channel layout: %"PRIx64"!\n", avctx->channel_layout);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int atrac3p_decode_init(AVCodecContext *avctx)
|
|
{
|
|
ATRAC3PContext *ctx = avctx->priv_data;
|
|
int i, ch, ret;
|
|
|
|
if (!avctx->block_align) {
|
|
av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
avpriv_float_dsp_init(&ctx->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
|
|
|
|
/* initialize IPQF */
|
|
ff_mdct_init(&ctx->ipqf_dct_ctx, 5, 1, 32.0 / 32768.0);
|
|
|
|
ff_atrac3p_init_imdct(avctx, &ctx->mdct_ctx);
|
|
|
|
ff_atrac_init_gain_compensation(&ctx->gainc_ctx, 6, 2);
|
|
|
|
ff_atrac3p_init_wave_synth();
|
|
|
|
if ((ret = set_channel_params(ctx, avctx)) < 0)
|
|
return ret;
|
|
|
|
ctx->my_channel_layout = avctx->channel_layout;
|
|
|
|
ctx->ch_units = av_mallocz(sizeof(*ctx->ch_units) *
|
|
ctx->num_channel_blocks);
|
|
if (!ctx->ch_units) {
|
|
atrac3p_decode_close(avctx);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
for (i = 0; i < ctx->num_channel_blocks; i++) {
|
|
for (ch = 0; ch < 2; ch++) {
|
|
ctx->ch_units[i].channels[ch].ch_num = ch;
|
|
ctx->ch_units[i].channels[ch].wnd_shape = &ctx->ch_units[i].channels[ch].wnd_shape_hist[0][0];
|
|
ctx->ch_units[i].channels[ch].wnd_shape_prev = &ctx->ch_units[i].channels[ch].wnd_shape_hist[1][0];
|
|
ctx->ch_units[i].channels[ch].gain_data = &ctx->ch_units[i].channels[ch].gain_data_hist[0][0];
|
|
ctx->ch_units[i].channels[ch].gain_data_prev = &ctx->ch_units[i].channels[ch].gain_data_hist[1][0];
|
|
ctx->ch_units[i].channels[ch].tones_info = &ctx->ch_units[i].channels[ch].tones_info_hist[0][0];
|
|
ctx->ch_units[i].channels[ch].tones_info_prev = &ctx->ch_units[i].channels[ch].tones_info_hist[1][0];
|
|
}
|
|
|
|
ctx->ch_units[i].waves_info = &ctx->ch_units[i].wave_synth_hist[0];
|
|
ctx->ch_units[i].waves_info_prev = &ctx->ch_units[i].wave_synth_hist[1];
|
|
}
|
|
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void decode_residual_spectrum(Atrac3pChanUnitCtx *ctx,
|
|
float out[2][ATRAC3P_FRAME_SAMPLES],
|
|
int num_channels,
|
|
AVCodecContext *avctx)
|
|
{
|
|
int i, sb, ch, qu, nspeclines, RNG_index;
|
|
float *dst, q;
|
|
int16_t *src;
|
|
/* calculate RNG table index for each subband */
|
|
int sb_RNG_index[ATRAC3P_SUBBANDS] = { 0 };
|
|
|
|
if (ctx->mute_flag) {
|
|
for (ch = 0; ch < num_channels; ch++)
|
|
memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
|
|
return;
|
|
}
|
|
|
|
for (qu = 0, RNG_index = 0; qu < ctx->used_quant_units; qu++)
|
|
RNG_index += ctx->channels[0].qu_sf_idx[qu] +
|
|
ctx->channels[1].qu_sf_idx[qu];
|
|
|
|
for (sb = 0; sb < ctx->num_coded_subbands; sb++, RNG_index += 128)
|
|
sb_RNG_index[sb] = RNG_index & 0x3FC;
|
|
|
|
/* inverse quant and power compensation */
|
|
for (ch = 0; ch < num_channels; ch++) {
|
|
/* clear channel's residual spectrum */
|
|
memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
|
|
|
|
for (qu = 0; qu < ctx->used_quant_units; qu++) {
|
|
src = &ctx->channels[ch].spectrum[ff_atrac3p_qu_to_spec_pos[qu]];
|
|
dst = &out[ch][ff_atrac3p_qu_to_spec_pos[qu]];
|
|
nspeclines = ff_atrac3p_qu_to_spec_pos[qu + 1] -
|
|
ff_atrac3p_qu_to_spec_pos[qu];
|
|
|
|
if (ctx->channels[ch].qu_wordlen[qu] > 0) {
|
|
q = ff_atrac3p_sf_tab[ctx->channels[ch].qu_sf_idx[qu]] *
|
|
ff_atrac3p_mant_tab[ctx->channels[ch].qu_wordlen[qu]];
|
|
for (i = 0; i < nspeclines; i++)
|
|
dst[i] = src[i] * q;
|
|
}
|
|
}
|
|
|
|
for (sb = 0; sb < ctx->num_coded_subbands; sb++)
|
|
ff_atrac3p_power_compensation(ctx, ch, &out[ch][0],
|
|
sb_RNG_index[sb], sb);
|
|
}
|
|
|
|
if (ctx->unit_type == CH_UNIT_STEREO) {
|
|
for (sb = 0; sb < ctx->num_coded_subbands; sb++) {
|
|
if (ctx->swap_channels[sb]) {
|
|
for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
|
|
FFSWAP(float, out[0][sb * ATRAC3P_SUBBAND_SAMPLES + i],
|
|
out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
|
|
}
|
|
|
|
/* flip coefficients' sign if requested */
|
|
if (ctx->negate_coeffs[sb])
|
|
for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
|
|
out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i] = -(out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void reconstruct_frame(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit,
|
|
int num_channels, AVCodecContext *avctx)
|
|
{
|
|
int ch, sb;
|
|
|
|
for (ch = 0; ch < num_channels; ch++) {
|
|
for (sb = 0; sb < ch_unit->num_subbands; sb++) {
|
|
/* inverse transform and windowing */
|
|
ff_atrac3p_imdct(&ctx->fdsp, &ctx->mdct_ctx,
|
|
&ctx->samples[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
|
|
&ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
|
|
(ch_unit->channels[ch].wnd_shape_prev[sb] << 1) +
|
|
ch_unit->channels[ch].wnd_shape[sb], sb);
|
|
|
|
/* gain compensation and overlapping */
|
|
ff_atrac_gain_compensation(&ctx->gainc_ctx,
|
|
&ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
|
|
&ch_unit->prev_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
|
|
&ch_unit->channels[ch].gain_data_prev[sb],
|
|
&ch_unit->channels[ch].gain_data[sb],
|
|
ATRAC3P_SUBBAND_SAMPLES,
|
|
&ctx->time_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES]);
|
|
}
|
|
|
|
/* zero unused subbands in both output and overlapping buffers */
|
|
memset(&ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
|
|
0,
|
|
(ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
|
|
ATRAC3P_SUBBAND_SAMPLES *
|
|
sizeof(ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
|
|
memset(&ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
|
|
0,
|
|
(ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
|
|
ATRAC3P_SUBBAND_SAMPLES *
|
|
sizeof(ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
|
|
|
|
/* resynthesize and add tonal signal */
|
|
if (ch_unit->waves_info->tones_present ||
|
|
ch_unit->waves_info_prev->tones_present) {
|
|
for (sb = 0; sb < ch_unit->num_subbands; sb++)
|
|
if (ch_unit->channels[ch].tones_info[sb].num_wavs ||
|
|
ch_unit->channels[ch].tones_info_prev[sb].num_wavs) {
|
|
ff_atrac3p_generate_tones(ch_unit, &ctx->fdsp, ch, sb,
|
|
&ctx->time_buf[ch][sb * 128]);
|
|
}
|
|
}
|
|
|
|
/* subband synthesis and acoustic signal output */
|
|
ff_atrac3p_ipqf(&ctx->ipqf_dct_ctx, &ch_unit->ipqf_ctx[ch],
|
|
&ctx->time_buf[ch][0], &ctx->outp_buf[ch][0]);
|
|
}
|
|
|
|
/* swap window shape and gain control buffers. */
|
|
for (ch = 0; ch < num_channels; ch++) {
|
|
FFSWAP(uint8_t *, ch_unit->channels[ch].wnd_shape,
|
|
ch_unit->channels[ch].wnd_shape_prev);
|
|
FFSWAP(AtracGainInfo *, ch_unit->channels[ch].gain_data,
|
|
ch_unit->channels[ch].gain_data_prev);
|
|
FFSWAP(Atrac3pWavesData *, ch_unit->channels[ch].tones_info,
|
|
ch_unit->channels[ch].tones_info_prev);
|
|
}
|
|
|
|
FFSWAP(Atrac3pWaveSynthParams *, ch_unit->waves_info, ch_unit->waves_info_prev);
|
|
}
|
|
|
|
static int atrac3p_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame_ptr, AVPacket *avpkt)
|
|
{
|
|
ATRAC3PContext *ctx = avctx->priv_data;
|
|
AVFrame *frame = data;
|
|
int i, ret, ch_unit_id, ch_block = 0, out_ch_index = 0, channels_to_process;
|
|
float **samples_p = (float **)frame->extended_data;
|
|
|
|
frame->nb_samples = ATRAC3P_FRAME_SAMPLES;
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return ret;
|
|
}
|
|
|
|
if ((ret = init_get_bits8(&ctx->gb, avpkt->data, avpkt->size)) < 0)
|
|
return ret;
|
|
|
|
if (get_bits1(&ctx->gb)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid start bit!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
while (get_bits_left(&ctx->gb) >= 2 &&
|
|
(ch_unit_id = get_bits(&ctx->gb, 2)) != CH_UNIT_TERMINATOR) {
|
|
if (ch_unit_id == CH_UNIT_EXTENSION) {
|
|
avpriv_report_missing_feature(avctx, "Channel unit extension");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
if (ch_block >= ctx->num_channel_blocks ||
|
|
ctx->channel_blocks[ch_block] != ch_unit_id) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Frame data doesn't match channel configuration!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ctx->ch_units[ch_block].unit_type = ch_unit_id;
|
|
channels_to_process = ch_unit_id + 1;
|
|
|
|
if ((ret = ff_atrac3p_decode_channel_unit(&ctx->gb,
|
|
&ctx->ch_units[ch_block],
|
|
channels_to_process,
|
|
avctx)) < 0)
|
|
return ret;
|
|
|
|
decode_residual_spectrum(&ctx->ch_units[ch_block], ctx->samples,
|
|
channels_to_process, avctx);
|
|
reconstruct_frame(ctx, &ctx->ch_units[ch_block],
|
|
channels_to_process, avctx);
|
|
|
|
for (i = 0; i < channels_to_process; i++)
|
|
memcpy(samples_p[out_ch_index + i], ctx->outp_buf[i],
|
|
ATRAC3P_FRAME_SAMPLES * sizeof(**samples_p));
|
|
|
|
ch_block++;
|
|
out_ch_index += channels_to_process;
|
|
}
|
|
|
|
*got_frame_ptr = 1;
|
|
|
|
return avctx->block_align;
|
|
}
|
|
|
|
AVCodec ff_atrac3p_decoder = {
|
|
.name = "atrac3plus",
|
|
.long_name = NULL_IF_CONFIG_SMALL("ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)"),
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_ATRAC3P,
|
|
.priv_data_size = sizeof(ATRAC3PContext),
|
|
.init = atrac3p_decode_init,
|
|
.init_static_data = ff_atrac3p_init_vlcs,
|
|
.close = atrac3p_decode_close,
|
|
.decode = atrac3p_decode_frame,
|
|
};
|