Rename several directories to use MixedCase instead of lowercase.

They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.


git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8

1 files changed, 187 insertions, 0 deletions

diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/ac3.h b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/ac3.h
new file mode 100644
index 000000000..4a4d3709b
--- /dev/null
+++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/ac3.h
@@ -0,0 +1,187 @@
+/*

+ * Common code between the AC-3 encoder and decoder

+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard

+ *

+ * 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 libavcodec/ac3.h

+ * Common code between the AC-3 encoder and decoder.

+ */

+

+#ifndef AVCODEC_AC3_H

+#define AVCODEC_AC3_H

+

+#include "ac3tab.h"

+

+#define AC3_MAX_CODED_FRAME_SIZE 3840 /* in bytes */

+#define AC3_MAX_CHANNELS 6 /* including LFE channel */

+

+#define NB_BLOCKS 6 /* number of PCM blocks inside an AC-3 frame */

+#define AC3_FRAME_SIZE (NB_BLOCKS * 256)

+

+/* exponent encoding strategy */

+#define EXP_REUSE 0

+#define EXP_NEW   1

+

+#define EXP_D15   1

+#define EXP_D25   2

+#define EXP_D45   3

+

+/** Delta bit allocation strategy */

+typedef enum {

+    DBA_REUSE = 0,

+    DBA_NEW,

+    DBA_NONE,

+    DBA_RESERVED

+} AC3DeltaStrategy;

+

+/** Channel mode (audio coding mode) */

+typedef enum {

+    AC3_CHMODE_DUALMONO = 0,

+    AC3_CHMODE_MONO,

+    AC3_CHMODE_STEREO,

+    AC3_CHMODE_3F,

+    AC3_CHMODE_2F1R,

+    AC3_CHMODE_3F1R,

+    AC3_CHMODE_2F2R,

+    AC3_CHMODE_3F2R

+} AC3ChannelMode;

+

+typedef struct AC3BitAllocParameters {

+    int sr_code;

+    int sr_shift;

+    int slow_gain, slow_decay, fast_decay, db_per_bit, floor;

+    int cpl_fast_leak, cpl_slow_leak;

+} AC3BitAllocParameters;

+

+/**

+ * @struct AC3HeaderInfo

+ * Coded AC-3 header values up to the lfeon element, plus derived values.

+ */

+typedef struct {

+    /** @defgroup coded Coded elements

+     * @{

+     */

+    uint16_t sync_word;

+    uint16_t crc1;

+    uint8_t sr_code;

+    uint8_t bitstream_id;

+    uint8_t channel_mode;

+    uint8_t lfe_on;

+    uint8_t frame_type;

+    int substreamid;                        ///< substream identification

+    int center_mix_level;                   ///< Center mix level index

+    int surround_mix_level;                 ///< Surround mix level index

+    uint16_t channel_map;

+    int num_blocks;                         ///< number of audio blocks

+    /** @} */

+

+    /** @defgroup derived Derived values

+     * @{

+     */

+    uint8_t sr_shift;

+    uint16_t sample_rate;

+    uint32_t bit_rate;

+    uint8_t channels;

+    uint16_t frame_size;

+    int64_t channel_layout;

+    /** @} */

+} AC3HeaderInfo;

+

+typedef enum {

+    EAC3_FRAME_TYPE_INDEPENDENT = 0,

+    EAC3_FRAME_TYPE_DEPENDENT,

+    EAC3_FRAME_TYPE_AC3_CONVERT,

+    EAC3_FRAME_TYPE_RESERVED

+} EAC3FrameType;

+

+void ac3_common_init(void);

+

+/**

+ * Calculates the log power-spectral density of the input signal.

+ * This gives a rough estimate of signal power in the frequency domain by using

+ * the spectral envelope (exponents).  The psd is also separately grouped

+ * into critical bands for use in the calculating the masking curve.

+ * 128 units in psd = -6 dB.  The dbknee parameter in AC3BitAllocParameters

+ * determines the reference level.

+ *

+ * @param[in]  exp        frequency coefficient exponents

+ * @param[in]  start      starting bin location

+ * @param[in]  end        ending bin location

+ * @param[out] psd        signal power for each frequency bin

+ * @param[out] band_psd   signal power for each critical band

+ */

+void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd,

+                               int16_t *band_psd);

+

+/**

+ * Calculates the masking curve.

+ * First, the excitation is calculated using parameters in s and the signal

+ * power in each critical band.  The excitation is compared with a predefined

+ * hearing threshold table to produce the masking curve.  If delta bit

+ * allocation information is provided, it is used for adjusting the masking

+ * curve, usually to give a closer match to a better psychoacoustic model.

+ *

+ * @param[in]  s            adjustable bit allocation parameters

+ * @param[in]  band_psd     signal power for each critical band

+ * @param[in]  start        starting bin location

+ * @param[in]  end          ending bin location

+ * @param[in]  fast_gain    fast gain (estimated signal-to-mask ratio)

+ * @param[in]  is_lfe       whether or not the channel being processed is the LFE

+ * @param[in]  dba_mode     delta bit allocation mode (none, reuse, or new)

+ * @param[in]  dba_nsegs    number of delta segments

+ * @param[in]  dba_offsets  location offsets for each segment

+ * @param[in]  dba_lengths  length of each segment

+ * @param[in]  dba_values   delta bit allocation for each segment

+ * @param[out] mask         calculated masking curve

+ * @return returns 0 for success, non-zero for error

+ */

+int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,

+                               int start, int end, int fast_gain, int is_lfe,

+                               int dba_mode, int dba_nsegs, uint8_t *dba_offsets,

+                               uint8_t *dba_lengths, uint8_t *dba_values,

+                               int16_t *mask);

+

+/**

+ * Calculates bit allocation pointers.

+ * The SNR is the difference between the masking curve and the signal.  AC-3

+ * uses this value for each frequency bin to allocate bits.  The snroffset

+ * parameter is a global adjustment to the SNR for all bins.

+ *

+ * @param[in]  mask       masking curve

+ * @param[in]  psd        signal power for each frequency bin

+ * @param[in]  start      starting bin location

+ * @param[in]  end        ending bin location

+ * @param[in]  snr_offset SNR adjustment

+ * @param[in]  floor      noise floor

+ * @param[in]  bap_tab    look-up table for bit allocation pointers

+ * @param[out] bap        bit allocation pointers

+ */

+void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,

+                               int snr_offset, int floor,

+                               const uint8_t *bap_tab, uint8_t *bap);

+

+void ac3_parametric_bit_allocation(AC3BitAllocParameters *s, uint8_t *bap,

+                                   int8_t *exp, int start, int end,

+                                   int snr_offset, int fast_gain, int is_lfe,

+                                   int dba_mode, int dba_nsegs,

+                                   uint8_t *dba_offsets, uint8_t *dba_lengths,

+                                   uint8_t *dba_values);

+

+#endif /* AVCODEC_AC3_H */