adding ffmpeg specific version

1 files changed, 77 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/mpc.h b/ffmpeg1/libavcodec/mpc.h
new file mode 100644
index 0000000..295b4c7
--- /dev/null
+++ b/ffmpeg1/libavcodec/mpc.h
@@ -0,0 +1,77 @@
+/*
+ * Musepack 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
+ * Musepack decoder
+ * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
+ * divided into 32 subbands.
+ */
+
+#ifndef AVCODEC_MPC_H
+#define AVCODEC_MPC_H
+
+#include "libavutil/lfg.h"
+#include "avcodec.h"
+#include "get_bits.h"
+#include "dsputil.h"
+#include "mpegaudio.h"
+#include "mpegaudiodsp.h"
+
+#define BANDS            32
+#define SAMPLES_PER_BAND 36
+#define MPC_FRAME_SIZE   (BANDS * SAMPLES_PER_BAND)
+
+/** Subband structure - hold all variables for each subband */
+typedef struct Band {
+    int msf; ///< mid-stereo flag
+    int res[2];
+    int scfi[2];
+    int scf_idx[2][3];
+    int Q[2];
+}Band;
+
+typedef struct MPCContext {
+    DSPContext dsp;
+    MPADSPContext mpadsp;
+    GetBitContext gb;
+    int IS, MSS, gapless;
+    int lastframelen;
+    int maxbands, last_max_band;
+    int last_bits_used;
+    int oldDSCF[2][BANDS];
+    Band bands[BANDS];
+    int Q[2][MPC_FRAME_SIZE];
+    int cur_frame, frames;
+    uint8_t *bits;
+    int buf_size;
+    AVLFG rnd;
+    int frames_to_skip;
+    /* for synthesis */
+    DECLARE_ALIGNED(16, MPA_INT, synth_buf)[MPA_MAX_CHANNELS][512*2];
+    int synth_buf_offset[MPA_MAX_CHANNELS];
+    DECLARE_ALIGNED(16, int32_t, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT];
+} MPCContext;
+
+void ff_mpc_init(void);
+void ff_mpc_dequantize_and_synth(MPCContext *c, int maxband, int16_t **out, int channels);
+
+#endif /* AVCODEC_MPC_H */