early-access version 1432

2021-02-09 04:25:58 +01:00
parent de64eab4b4
commit 3d5a9d908a
7336 changed files with 1773492 additions and 111 deletions
--- a/externals/ffmpeg/libavcodec/mlp_parse.h
+++ b/externals/ffmpeg/libavcodec/mlp_parse.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2007 Ian Caulfield
+ *
+ * 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
+ */
+
+#ifndef AVCODEC_MLP_PARSE_H
+#define AVCODEC_MLP_PARSE_H
+
+#include "get_bits.h"
+
+typedef struct MLPHeaderInfo
+{
+    int stream_type;                        ///< 0xBB for MLP, 0xBA for TrueHD
+    int header_size;                        ///< Size of the major sync header, in bytes
+
+    int group1_bits;                        ///< The bit depth of the first substream
+    int group2_bits;                        ///< Bit depth of the second substream (MLP only)
+
+    int group1_samplerate;                  ///< Sample rate of first substream
+    int group2_samplerate;                  ///< Sample rate of second substream (MLP only)
+
+    int channel_arrangement;
+
+    int channel_modifier_thd_stream0;       ///< Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
+    int channel_modifier_thd_stream1;       ///< Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
+    int channel_modifier_thd_stream2;       ///< Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
+
+    int channels_mlp;                       ///< Channel count for MLP streams
+    int channels_thd_stream1;               ///< Channel count for substream 1 of TrueHD streams ("6-channel presentation")
+    int channels_thd_stream2;               ///< Channel count for substream 2 of TrueHD streams ("8-channel presentation")
+    uint64_t channel_layout_mlp;            ///< Channel layout for MLP streams
+    uint64_t channel_layout_thd_stream1;    ///< Channel layout for substream 1 of TrueHD streams ("6-channel presentation")
+    uint64_t channel_layout_thd_stream2;    ///< Channel layout for substream 2 of TrueHD streams ("8-channel presentation")
+
+    int access_unit_size;                   ///< Number of samples per coded frame
+    int access_unit_size_pow2;              ///< Next power of two above number of samples per frame
+
+    int is_vbr;                             ///< Stream is VBR instead of CBR
+    int peak_bitrate;                       ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
+
+    int num_substreams;                     ///< Number of substreams within stream
+} MLPHeaderInfo;
+
+static const uint8_t thd_chancount[13] = {
+//  LR    C   LFE  LRs LRvh  LRc LRrs  Cs   Ts  LRsd  LRw  Cvh  LFE2
+     2,   1,   1,   2,   2,   2,   2,   1,   1,   2,   2,   1,   1
+};
+
+static const uint64_t thd_layout[13] = {
+    AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT,                     // LR
+    AV_CH_FRONT_CENTER,                                     // C
+    AV_CH_LOW_FREQUENCY,                                    // LFE
+    AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT,                       // LRs
+    AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT,             // LRvh
+    AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER, // LRc
+    AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT,                       // LRrs
+    AV_CH_BACK_CENTER,                                      // Cs
+    AV_CH_TOP_CENTER,                                       // Ts
+    AV_CH_SURROUND_DIRECT_LEFT|AV_CH_SURROUND_DIRECT_RIGHT, // LRsd
+    AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT,                       // LRw
+    AV_CH_TOP_FRONT_CENTER,                                 // Cvh
+    AV_CH_LOW_FREQUENCY_2,                                  // LFE2
+};
+
+static inline int mlp_samplerate(int in)
+{
+    if (in == 0xF)
+        return 0;
+
+    return (in & 8 ? 44100 : 48000) << (in & 7) ;
+}
+
+static inline int truehd_channels(int chanmap)
+{
+    int channels = 0, i;
+
+    for (i = 0; i < 13; i++)
+        channels += thd_chancount[i] * ((chanmap >> i) & 1);
+
+    return channels;
+}
+
+static inline uint64_t truehd_layout(int chanmap)
+{
+    int i;
+    uint64_t layout = 0;
+
+    for (i = 0; i < 13; i++)
+        layout |= thd_layout[i] * ((chanmap >> i) & 1);
+
+    return layout;
+}
+
+int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb);
+
+#endif /* AVCODEC_MLP_PARSE_H */