* Musepack SV8 decoder
* Copyright (c) 2007 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/mpc8.c Musepack SV8 decoder
+ * @file
* MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
* divided into 32 subbands.
*/
#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
-#include "mpegaudio.h"
+#include "mpegaudiodsp.h"
+#include "libavutil/audioconvert.h"
#include "mpc.h"
-#include "mpcdata.h"
#include "mpc8data.h"
#include "mpc8huff.h"
static inline int mpc8_dec_base(GetBitContext *gb, int k, int n)
{
- int code = get_bits(gb, mpc8_cnk_len[k-1][n-1] - 1);
+ int len = mpc8_cnk_len[k-1][n-1] - 1;
+ int code = len ? get_bits_long(gb, len) : 0;
if (code >= mpc8_cnk_lost[k-1][n-1])
code = ((code << 1) | get_bits1(gb)) - mpc8_cnk_lost[k-1][n-1];
return mask;
}
-static int vlc_offsets[13] = {
+static const uint16_t vlc_offsets[13] = {
0, 640, 1184, 1748, 2298, 2426, 2554, 3066, 3578, 4106, 4618, 5196, 5708
};
MPCContext *c = avctx->priv_data;
GetBitContext gb;
static int vlc_initialized = 0;
+ int channels;
static VLC_TYPE band_table[542][2];
static VLC_TYPE q1_table[520][2];
memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
av_lfg_init(&c->rnd, 0xDEADBEEF);
dsputil_init(&c->dsp, avctx);
+ ff_mpadsp_init(&c->mpadsp);
ff_mpc_init();
skip_bits(&gb, 3);//sample rate
c->maxbands = get_bits(&gb, 5) + 1;
- skip_bits(&gb, 4);//channels
+ channels = get_bits(&gb, 4) + 1;
+ if (channels > 2) {
+ av_log_missing_feature(avctx, "Multichannel MPC SV8", 1);
+ return -1;
+ }
c->MSS = get_bits1(&gb);
c->frames = 1 << (get_bits(&gb, 3) * 2);
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ avctx->channel_layout = (avctx->channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
+
if(vlc_initialized) return 0;
av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
&mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
}
vlc_initialized = 1;
- avctx->sample_fmt = SAMPLE_FMT_S16;
- avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
return 0;
}
GetBitContext gb2, *gb = &gb2;
int i, j, k, ch, cnt, res, t;
Band *bands = c->bands;
- int off;
+ int off, out_size;
int maxband, keyframe;
int last[2];
+ out_size = MPC_FRAME_SIZE * 2 * avctx->channels;
+ if (*data_size < out_size) {
+ av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
+ return AVERROR(EINVAL);
+ }
+
keyframe = c->cur_frame == 0;
if(keyframe){
maxband = c->last_max_band + get_vlc2(gb, band_vlc.table, MPC8_BANDS_BITS, 2);
if(maxband > 32) maxband -= 33;
}
+ if(maxband > c->maxbands)
+ return AVERROR_INVALIDDATA;
c->last_max_band = maxband;
/* read subband indexes */
}
}
- ff_mpc_dequantize_and_synth(c, maxband, data);
+ ff_mpc_dequantize_and_synth(c, maxband, data, avctx->channels);
c->cur_frame++;
c->last_bits_used = get_bits_count(gb);
if(c->cur_frame >= c->frames)
c->cur_frame = 0;
- *data_size = MPC_FRAME_SIZE * 4;
+ *data_size = out_size;
return c->cur_frame ? c->last_bits_used >> 3 : buf_size;
}
-AVCodec mpc8_decoder = {
- "mpc8",
- CODEC_TYPE_AUDIO,
- CODEC_ID_MUSEPACK8,
- sizeof(MPCContext),
- mpc8_decode_init,
- NULL,
- NULL,
- mpc8_decode_frame,
+AVCodec ff_mpc8_decoder = {
+ .name = "mpc8",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_MUSEPACK8,
+ .priv_data_size = sizeof(MPCContext),
+ .init = mpc8_decode_init,
+ .decode = mpc8_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
};