summaryrefslogtreecommitdiff
path: root/contrib/ffmpeg/libavcodec/mpc7.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mpc7.c')
-rw-r--r--contrib/ffmpeg/libavcodec/mpc7.c276
1 files changed, 0 insertions, 276 deletions
diff --git a/contrib/ffmpeg/libavcodec/mpc7.c b/contrib/ffmpeg/libavcodec/mpc7.c
deleted file mode 100644
index 37bdb5f39..000000000
--- a/contrib/ffmpeg/libavcodec/mpc7.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/*
- * 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 mpc7.c Musepack SV7 decoder
- * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
- * divided into 32 subbands.
- */
-
-#include "avcodec.h"
-#include "bitstream.h"
-#include "dsputil.h"
-#include "random.h"
-
-#ifdef CONFIG_MPEGAUDIO_HP
-#define USE_HIGHPRECISION
-#endif
-#include "mpegaudio.h"
-
-#include "mpc.h"
-#include "mpc7data.h"
-
-#define BANDS 32
-#define SAMPLES_PER_BAND 36
-#define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)
-
-static VLC scfi_vlc, dscf_vlc, hdr_vlc, quant_vlc[MPC7_QUANT_VLC_TABLES][2];
-
-static int mpc7_decode_init(AVCodecContext * avctx)
-{
- int i, j;
- MPCContext *c = avctx->priv_data;
- GetBitContext gb;
- uint8_t buf[16];
- static int vlc_initialized = 0;
-
- if(avctx->extradata_size < 16){
- av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
- return -1;
- }
- memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
- av_init_random(0xDEADBEEF, &c->rnd);
- dsputil_init(&c->dsp, avctx);
- c->dsp.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 -1;
- }
- skip_bits(&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;
-
- if(vlc_initialized) return 0;
- av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
- if(init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
- &mpc7_scfi[1], 2, 1,
- &mpc7_scfi[0], 2, 1, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
- return -1;
- }
- if(init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
- &mpc7_dscf[1], 2, 1,
- &mpc7_dscf[0], 2, 1, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
- return -1;
- }
- if(init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
- &mpc7_hdr[1], 2, 1,
- &mpc7_hdr[0], 2, 1, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init HDR VLC\n");
- return -1;
- }
- for(i = 0; i < MPC7_QUANT_VLC_TABLES; i++){
- for(j = 0; j < 2; j++){
- if(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_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init QUANT VLC %i,%i\n",i,j);
- return -1;
- }
- }
- }
- 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_random(&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 mpc7_decode_frame(AVCodecContext * avctx,
- void *data, int *data_size,
- const uint8_t * buf, int buf_size)
-{
- MPCContext *c = avctx->priv_data;
- GetBitContext gb;
- uint8_t *bits;
- int i, ch, t;
- int mb = -1;
- Band *bands = c->bands;
- int off;
- int bits_used, bits_avail;
-
- memset(bands, 0, sizeof(bands));
- if(buf_size <= 4){
- av_log(avctx, AV_LOG_ERROR, "Too small buffer passed (%i bytes)\n", buf_size);
- }
-
- 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]);
-
- /* read subband indexes */
- for(i = 0; i <= c->maxbands; i++){
- for(ch = 0; ch < 2; ch++){
- 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);
- else bands[i].res[ch] = bands[i-1].res[ch] + t;
- }
-
- 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];
- 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);
- 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);
- 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][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);
- 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, data);
-
- av_free(bits);
-
- bits_used = get_bits_count(&gb);
- bits_avail = (buf_size - 4) * 8;
- if(!buf[1] && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))){
- av_log(NULL,0, "Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);
- return -1;
- }
- if(c->frames_to_skip){
- c->frames_to_skip--;
- *data_size = 0;
- return buf_size;
- }
- *data_size = (buf[1] ? c->lastframelen : MPC_FRAME_SIZE) * 4;
-
- return buf_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;
-}
-
-AVCodec mpc7_decoder = {
- "mpc sv7",
- CODEC_TYPE_AUDIO,
- CODEC_ID_MUSEPACK7,
- sizeof(MPCContext),
- mpc7_decode_init,
- NULL,
- NULL,
- mpc7_decode_frame,
- .flush = mpc7_decode_flush,
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-02 00:21:37 +0000