X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmlp.h;h=5a4ee5fc422fca7745c6f9600c73e09da9889ce3;hb=6a8475dc4f10d65edb7faa8df6e035af0ddcce19;hp=f4bb9246e34c2f47fbece8f1145221285f333c66;hpb=309616b2490d5504fe95fc0d71d2001a5ac27768;p=ffmpeg

diff --git a/libavcodec/mlp.h b/libavcodec/mlp.h
index f4bb9246e34..5a4ee5fc422 100644
--- a/libavcodec/mlp.h
+++ b/libavcodec/mlp.h
@@ -2,20 +2,20 @@
  * MLP codec common header file
  * Copyright (c) 2007-2008 Ian Caulfield
  *
- * 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
  */
 
@@ -29,28 +29,33 @@
 /** Last possible matrix channel for each codec */
 #define MAX_MATRIX_CHANNEL_MLP      5
 #define MAX_MATRIX_CHANNEL_TRUEHD   7
-/** Maximum number of channels that can be decoded. */
-#define MAX_CHANNELS        16
+/** Maximum number of channels in a valid stream.
+ *  MLP   : 5.1 + 2 noise channels -> 8 channels
+ *  TrueHD: 7.1                    -> 8 channels
+ */
+#define MAX_CHANNELS                8
 
 /** Maximum number of matrices used in decoding; most streams have one matrix
  *  per output channel, but some rematrix a channel (usually 0) more than once.
  */
 #define MAX_MATRICES_MLP            6
 #define MAX_MATRICES_TRUEHD         8
-#define MAX_MATRICES        15
+#define MAX_MATRICES                8
 
 /** Maximum number of substreams that can be decoded.
  *  MLP's limit is 2. TrueHD supports at least up to 3.
  */
 #define MAX_SUBSTREAMS      3
 
+/** which multiple of 48000 the maximum sample rate is */
+#define MAX_RATEFACTOR      4
 /** maximum sample frequency seen in files */
-#define MAX_SAMPLERATE      192000
+#define MAX_SAMPLERATE      (MAX_RATEFACTOR * 48000)
 
 /** maximum number of audio samples within one access unit */
-#define MAX_BLOCKSIZE       (40 * (MAX_SAMPLERATE / 48000))
+#define MAX_BLOCKSIZE       (40 * MAX_RATEFACTOR)
 /** next power of two greater than MAX_BLOCKSIZE */
-#define MAX_BLOCKSIZE_POW2  (64 * (MAX_SAMPLERATE / 48000))
+#define MAX_BLOCKSIZE_POW2  (64 * MAX_RATEFACTOR)
 
 /** number of allowed filters */
 #define NUM_FILTERS         2
@@ -66,17 +71,17 @@
 #define IIR 1
 
 /** filter data */
-typedef struct {
+typedef struct FilterParams {
     uint8_t     order; ///< number of taps in filter
     uint8_t     shift; ///< Right shift to apply to output of filter.
 
-    int32_t     coeff[MAX_FIR_ORDER];
     int32_t     state[MAX_FIR_ORDER];
 } FilterParams;
 
 /** sample data coding information */
-typedef struct {
+typedef struct ChannelParams {
     FilterParams filter_params[NUM_FILTERS];
+    int32_t     coeff[NUM_FILTERS][MAX_FIR_ORDER];
 
     int16_t     huff_offset;      ///< Offset to apply to residual values.
     int32_t     sign_huff_offset; ///< sign/rounding-corrected version of huff_offset
@@ -119,4 +124,14 @@ static inline uint8_t xor_32_to_8(uint32_t value)
     return value;
 }
 
+typedef enum THDChannelModifier {
+    THD_CH_MODIFIER_NOTINDICATED  = 0x0,
+    THD_CH_MODIFIER_STEREO        = 0x0, // Stereo (not Dolby Surround)
+    THD_CH_MODIFIER_LTRT          = 0x1, // Dolby Surround
+    THD_CH_MODIFIER_LBINRBIN      = 0x2, // Dolby Headphone
+    THD_CH_MODIFIER_MONO          = 0x3, // Mono or Dual Mono
+    THD_CH_MODIFIER_NOTSURROUNDEX = 0x1, // Not Dolby Digital EX
+    THD_CH_MODIFIER_SURROUNDEX    = 0x2, // Dolby Digital EX
+} THDChannelModifier;
+
 #endif /* AVCODEC_MLP_H */