mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 05:18:25 -05:00
345 lines
12 KiB
C
Executable File
345 lines
12 KiB
C
Executable File
/*
|
|
* Musepack SV7 decoder
|
|
* Copyright (c) 2006 Konstantin Shishkov
|
|
*
|
|
* 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
|
|
* MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
|
|
* divided into 32 subbands.
|
|
*/
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/lfg.h"
|
|
#include "avcodec.h"
|
|
#include "get_bits.h"
|
|
#include "internal.h"
|
|
#include "mpegaudiodsp.h"
|
|
|
|
#include "mpc.h"
|
|
#include "mpc7data.h"
|
|
|
|
static VLC scfi_vlc, dscf_vlc, hdr_vlc, quant_vlc[MPC7_QUANT_VLC_TABLES][2];
|
|
|
|
static const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES*2 + 1] =
|
|
{
|
|
0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
|
|
5636, 6164, 6676, 7224
|
|
};
|
|
|
|
|
|
static av_cold int mpc7_decode_init(AVCodecContext * avctx)
|
|
{
|
|
int i, j, ret;
|
|
MPCContext *c = avctx->priv_data;
|
|
GetBitContext gb;
|
|
LOCAL_ALIGNED_16(uint8_t, buf, [16]);
|
|
static int vlc_initialized = 0;
|
|
|
|
static VLC_TYPE scfi_table[1 << MPC7_SCFI_BITS][2];
|
|
static VLC_TYPE dscf_table[1 << MPC7_DSCF_BITS][2];
|
|
static VLC_TYPE hdr_table[1 << MPC7_HDR_BITS][2];
|
|
static VLC_TYPE quant_tables[7224][2];
|
|
|
|
/* Musepack SV7 is always stereo */
|
|
if (avctx->channels != 2) {
|
|
avpriv_request_sample(avctx, "%d channels", avctx->channels);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if(avctx->extradata_size < 16){
|
|
av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
|
|
av_lfg_init(&c->rnd, 0xDEADBEEF);
|
|
ff_bswapdsp_init(&c->bdsp);
|
|
ff_mpadsp_init(&c->mpadsp);
|
|
c->bdsp.bswap_buf((uint32_t *) buf, (const uint32_t *) avctx->extradata, 4);
|
|
ff_mpc_init();
|
|
init_get_bits(&gb, buf, 128);
|
|
|
|
c->IS = get_bits1(&gb);
|
|
c->MSS = get_bits1(&gb);
|
|
c->maxbands = get_bits(&gb, 6);
|
|
if(c->maxbands >= BANDS){
|
|
av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->maxbands);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
skip_bits_long(&gb, 88);
|
|
c->gapless = get_bits1(&gb);
|
|
c->lastframelen = get_bits(&gb, 11);
|
|
av_log(avctx, AV_LOG_DEBUG, "IS: %d, MSS: %d, TG: %d, LFL: %d, bands: %d\n",
|
|
c->IS, c->MSS, c->gapless, c->lastframelen, c->maxbands);
|
|
c->frames_to_skip = 0;
|
|
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
|
|
avctx->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
|
|
if(vlc_initialized) return 0;
|
|
av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
|
|
scfi_vlc.table = scfi_table;
|
|
scfi_vlc.table_allocated = 1 << MPC7_SCFI_BITS;
|
|
if ((ret = init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
|
|
&mpc7_scfi[1], 2, 1,
|
|
&mpc7_scfi[0], 2, 1, INIT_VLC_USE_NEW_STATIC))) {
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
|
|
return ret;
|
|
}
|
|
dscf_vlc.table = dscf_table;
|
|
dscf_vlc.table_allocated = 1 << MPC7_DSCF_BITS;
|
|
if ((ret = init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
|
|
&mpc7_dscf[1], 2, 1,
|
|
&mpc7_dscf[0], 2, 1, INIT_VLC_USE_NEW_STATIC))) {
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
|
|
return ret;
|
|
}
|
|
hdr_vlc.table = hdr_table;
|
|
hdr_vlc.table_allocated = 1 << MPC7_HDR_BITS;
|
|
if ((ret = init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
|
|
&mpc7_hdr[1], 2, 1,
|
|
&mpc7_hdr[0], 2, 1, INIT_VLC_USE_NEW_STATIC))) {
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot init HDR VLC\n");
|
|
return ret;
|
|
}
|
|
for(i = 0; i < MPC7_QUANT_VLC_TABLES; i++){
|
|
for(j = 0; j < 2; j++){
|
|
quant_vlc[i][j].table = &quant_tables[quant_offsets[i*2 + j]];
|
|
quant_vlc[i][j].table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*2 + j];
|
|
if ((ret = init_vlc(&quant_vlc[i][j], 9, mpc7_quant_vlc_sizes[i],
|
|
&mpc7_quant_vlc[i][j][1], 4, 2,
|
|
&mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_NEW_STATIC))) {
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot init QUANT VLC %i,%i\n",i,j);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
vlc_initialized = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Fill samples for given subband
|
|
*/
|
|
static inline void idx_to_quant(MPCContext *c, GetBitContext *gb, int idx, int *dst)
|
|
{
|
|
int i, i1, t;
|
|
switch(idx){
|
|
case -1:
|
|
for(i = 0; i < SAMPLES_PER_BAND; i++){
|
|
*dst++ = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
|
|
}
|
|
break;
|
|
case 1:
|
|
i1 = get_bits1(gb);
|
|
for(i = 0; i < SAMPLES_PER_BAND/3; i++){
|
|
t = get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
|
|
*dst++ = mpc7_idx30[t];
|
|
*dst++ = mpc7_idx31[t];
|
|
*dst++ = mpc7_idx32[t];
|
|
}
|
|
break;
|
|
case 2:
|
|
i1 = get_bits1(gb);
|
|
for(i = 0; i < SAMPLES_PER_BAND/2; i++){
|
|
t = get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
|
|
*dst++ = mpc7_idx50[t];
|
|
*dst++ = mpc7_idx51[t];
|
|
}
|
|
break;
|
|
case 3: case 4: case 5: case 6: case 7:
|
|
i1 = get_bits1(gb);
|
|
for(i = 0; i < SAMPLES_PER_BAND; i++)
|
|
*dst++ = get_vlc2(gb, quant_vlc[idx-1][i1].table, 9, 2) - mpc7_quant_vlc_off[idx-1];
|
|
break;
|
|
case 8: case 9: case 10: case 11: case 12:
|
|
case 13: case 14: case 15: case 16: case 17:
|
|
t = (1 << (idx - 2)) - 1;
|
|
for(i = 0; i < SAMPLES_PER_BAND; i++)
|
|
*dst++ = get_bits(gb, idx - 1) - t;
|
|
break;
|
|
default: // case 0 and -2..-17
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int get_scale_idx(GetBitContext *gb, int ref)
|
|
{
|
|
int t = get_vlc2(gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
|
|
if (t == 8)
|
|
return get_bits(gb, 6);
|
|
return ref + t;
|
|
}
|
|
|
|
static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
|
|
int *got_frame_ptr, AVPacket *avpkt)
|
|
{
|
|
AVFrame *frame = data;
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size;
|
|
MPCContext *c = avctx->priv_data;
|
|
GetBitContext gb;
|
|
int i, ch;
|
|
int mb = -1;
|
|
Band *bands = c->bands;
|
|
int off, ret, last_frame, skip;
|
|
int bits_used, bits_avail;
|
|
|
|
memset(bands, 0, sizeof(*bands) * (c->maxbands + 1));
|
|
|
|
buf_size = avpkt->size & ~3;
|
|
if (buf_size <= 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet size is too small (%i bytes)\n",
|
|
avpkt->size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (buf_size != avpkt->size) {
|
|
av_log(avctx, AV_LOG_WARNING, "packet size is not a multiple of 4. "
|
|
"extra bytes at the end will be skipped.\n");
|
|
}
|
|
|
|
skip = buf[0];
|
|
last_frame = buf[1];
|
|
buf += 4;
|
|
buf_size -= 4;
|
|
|
|
/* get output buffer */
|
|
frame->nb_samples = MPC_FRAME_SIZE;
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
|
|
return ret;
|
|
|
|
av_fast_padded_malloc(&c->bits, &c->buf_size, buf_size);
|
|
if (!c->bits)
|
|
return AVERROR(ENOMEM);
|
|
c->bdsp.bswap_buf((uint32_t *) c->bits, (const uint32_t *) buf,
|
|
buf_size >> 2);
|
|
if ((ret = init_get_bits8(&gb, c->bits, buf_size)) < 0)
|
|
return ret;
|
|
skip_bits_long(&gb, skip);
|
|
|
|
/* read subband indexes */
|
|
for(i = 0; i <= c->maxbands; i++){
|
|
for(ch = 0; ch < 2; ch++){
|
|
int t = 4;
|
|
if(i) t = get_vlc2(&gb, hdr_vlc.table, MPC7_HDR_BITS, 1) - 5;
|
|
if(t == 4) bands[i].res[ch] = get_bits(&gb, 4);
|
|
else bands[i].res[ch] = bands[i-1].res[ch] + t;
|
|
if (bands[i].res[ch] < -1 || bands[i].res[ch] > 17) {
|
|
av_log(avctx, AV_LOG_ERROR, "subband index invalid\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
if(bands[i].res[0] || bands[i].res[1]){
|
|
mb = i;
|
|
if(c->MSS) bands[i].msf = get_bits1(&gb);
|
|
}
|
|
}
|
|
/* get scale indexes coding method */
|
|
for(i = 0; i <= mb; i++)
|
|
for(ch = 0; ch < 2; ch++)
|
|
if(bands[i].res[ch]) bands[i].scfi[ch] = get_vlc2(&gb, scfi_vlc.table, MPC7_SCFI_BITS, 1);
|
|
/* get scale indexes */
|
|
for(i = 0; i <= mb; i++){
|
|
for(ch = 0; ch < 2; ch++){
|
|
if(bands[i].res[ch]){
|
|
bands[i].scf_idx[ch][2] = c->oldDSCF[ch][i];
|
|
bands[i].scf_idx[ch][0] = get_scale_idx(&gb, bands[i].scf_idx[ch][2]);
|
|
switch(bands[i].scfi[ch]){
|
|
case 0:
|
|
bands[i].scf_idx[ch][1] = get_scale_idx(&gb, bands[i].scf_idx[ch][0]);
|
|
bands[i].scf_idx[ch][2] = get_scale_idx(&gb, bands[i].scf_idx[ch][1]);
|
|
break;
|
|
case 1:
|
|
bands[i].scf_idx[ch][1] = get_scale_idx(&gb, bands[i].scf_idx[ch][0]);
|
|
bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1];
|
|
break;
|
|
case 2:
|
|
bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
|
|
bands[i].scf_idx[ch][2] = get_scale_idx(&gb, bands[i].scf_idx[ch][1]);
|
|
break;
|
|
case 3:
|
|
bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
|
|
break;
|
|
}
|
|
c->oldDSCF[ch][i] = bands[i].scf_idx[ch][2];
|
|
}
|
|
}
|
|
}
|
|
/* get quantizers */
|
|
memset(c->Q, 0, sizeof(c->Q));
|
|
off = 0;
|
|
for(i = 0; i < BANDS; i++, off += SAMPLES_PER_BAND)
|
|
for(ch = 0; ch < 2; ch++)
|
|
idx_to_quant(c, &gb, bands[i].res[ch], c->Q[ch] + off);
|
|
|
|
ff_mpc_dequantize_and_synth(c, mb, (int16_t **)frame->extended_data, 2);
|
|
if(last_frame)
|
|
frame->nb_samples = c->lastframelen;
|
|
|
|
bits_used = get_bits_count(&gb);
|
|
bits_avail = buf_size * 8;
|
|
if (!last_frame && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if(c->frames_to_skip){
|
|
c->frames_to_skip--;
|
|
*got_frame_ptr = 0;
|
|
return avpkt->size;
|
|
}
|
|
|
|
*got_frame_ptr = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static void mpc7_decode_flush(AVCodecContext *avctx)
|
|
{
|
|
MPCContext *c = avctx->priv_data;
|
|
|
|
memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
|
|
c->frames_to_skip = 32;
|
|
}
|
|
|
|
static av_cold int mpc7_decode_close(AVCodecContext *avctx)
|
|
{
|
|
MPCContext *c = avctx->priv_data;
|
|
av_freep(&c->bits);
|
|
c->buf_size = 0;
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_mpc7_decoder = {
|
|
.name = "mpc7",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Musepack SV7"),
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_MUSEPACK7,
|
|
.priv_data_size = sizeof(MPCContext),
|
|
.init = mpc7_decode_init,
|
|
.close = mpc7_decode_close,
|
|
.decode = mpc7_decode_frame,
|
|
.flush = mpc7_decode_flush,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
|
|
AV_SAMPLE_FMT_NONE },
|
|
};
|