X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmpc7.c;h=dbfa3c8636a02ae02cafd5393d317eec89fcee4b;hb=b04997839786c56e5000569d0192fa629e2d3a76;hp=a15f117427eff8cdb1b1017a40221c76a081c72d;hpb=40039717171689b6802fa69b9a14679e69675302;p=ffmpeg diff --git a/libavcodec/mpc7.c b/libavcodec/mpc7.c index a15f117427e..dbfa3c8636a 100644 --- a/libavcodec/mpc7.c +++ b/libavcodec/mpc7.c @@ -2,25 +2,25 @@ * Musepack SV7 decoder * Copyright (c) 2006 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/mpc7.c Musepack SV7 decoder + * @file * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples * divided into 32 subbands. */ @@ -29,7 +29,8 @@ #include "avcodec.h" #include "get_bits.h" #include "dsputil.h" -#include "mpegaudio.h" +#include "mpegaudiodsp.h" +#include "libavutil/audioconvert.h" #include "mpc.h" #include "mpc7data.h" @@ -67,6 +68,7 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx) memset(c->oldDSCF, 0, sizeof(c->oldDSCF)); av_lfg_init(&c->rnd, 0xDEADBEEF); dsputil_init(&c->dsp, avctx); + ff_mpadsp_init(&c->mpadsp); c->dsp.bswap_buf((uint32_t*)buf, (const uint32_t*)avctx->extradata, 4); ff_mpc_init(); init_get_bits(&gb, buf, 128); @@ -78,13 +80,16 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx) av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->maxbands); return -1; } - skip_bits(&gb, 88); + 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_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"); scfi_vlc.table = scfi_table; @@ -124,8 +129,6 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx) } } vlc_initialized = 1; - avctx->sample_fmt = SAMPLE_FMT_S16; - avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO; return 0; } @@ -174,6 +177,14 @@ static inline void idx_to_quant(MPCContext *c, GetBitContext *gb, int idx, int * } } +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 *data_size, AVPacket *avpkt) @@ -183,7 +194,7 @@ static int mpc7_decode_frame(AVCodecContext * avctx, MPCContext *c = avctx->priv_data; GetBitContext gb; uint8_t *bits; - int i, ch, t; + int i, ch; int mb = -1; Band *bands = c->bands; int off; @@ -197,13 +208,14 @@ static int mpc7_decode_frame(AVCodecContext * avctx, bits = av_malloc(((buf_size - 1) & ~3) + FF_INPUT_BUFFER_PADDING_SIZE); c->dsp.bswap_buf((uint32_t*)bits, (const uint32_t*)(buf + 4), (buf_size - 4) >> 2); init_get_bits(&gb, bits, (buf_size - 4)* 8); - skip_bits(&gb, buf[0]); + skip_bits_long(&gb, buf[0]); /* 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(!i || (t == 4)) bands[i].res[ch] = get_bits(&gb, 4); + if(t == 4) bands[i].res[ch] = get_bits(&gb, 4); else bands[i].res[ch] = bands[i-1].res[ch] + t; } @@ -221,24 +233,19 @@ static int mpc7_decode_frame(AVCodecContext * avctx, for(ch = 0; ch < 2; ch++){ if(bands[i].res[ch]){ bands[i].scf_idx[ch][2] = c->oldDSCF[ch][i]; - t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7; - bands[i].scf_idx[ch][0] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][2] + t); + bands[i].scf_idx[ch][0] = get_scale_idx(&gb, bands[i].scf_idx[ch][2]); switch(bands[i].scfi[ch]){ case 0: - t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7; - bands[i].scf_idx[ch][1] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][0] + t); - t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7; - bands[i].scf_idx[ch][2] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][1] + t); + 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: - t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7; - bands[i].scf_idx[ch][1] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][0] + t); + 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]; - t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7; - bands[i].scf_idx[ch][2] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][1] + t); + 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]; @@ -255,7 +262,7 @@ static int mpc7_decode_frame(AVCodecContext * avctx, 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, data); + ff_mpc_dequantize_and_synth(c, mb, data, 2); av_free(bits); @@ -283,9 +290,9 @@ static void mpc7_decode_flush(AVCodecContext *avctx) c->frames_to_skip = 32; } -AVCodec mpc7_decoder = { +AVCodec ff_mpc7_decoder = { "mpc7", - CODEC_TYPE_AUDIO, + AVMEDIA_TYPE_AUDIO, CODEC_ID_MUSEPACK7, sizeof(MPCContext), mpc7_decode_init,