(*
* 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
*
* This is a part of the Pascal port of ffmpeg.
* - Changes and updates by the UltraStar Deluxe Team
*
* Conversion of libavutil/channel_layout.h and libavcodec/audioconvert.h
* avutil version 52.38.100; avcodec version 55.18.102
*
*)
(** libavutil/channel_layout.h **)
(**
* @file
* audio channel layout utility functions
*)
(**
* @defgroup channel_masks Audio channel masks
*
* A channel layout is a 64-bits integer with a bit set for every channel.
* The number of bits set must be equal to the number of channels.
* The value 0 means that the channel layout is not known.
* @note this data structure is not powerful enough to handle channels
* combinations that have the same channel multiple times, such as
* dual-mono.
*
*)
const
{* Audio channel masks *}
AV_CH_FRONT_LEFT = $00000001;
AV_CH_FRONT_RIGHT = $00000002;
AV_CH_FRONT_CENTER = $00000004;
AV_CH_LOW_FREQUENCY = $00000008;
AV_CH_BACK_LEFT = $00000010;
AV_CH_BACK_RIGHT = $00000020;
AV_CH_FRONT_LEFT_OF_CENTER = $00000040;
AV_CH_FRONT_RIGHT_OF_CENTER = $00000080;
AV_CH_BACK_CENTER = $00000100;
AV_CH_SIDE_LEFT = $00000200;
AV_CH_SIDE_RIGHT = $00000400;
AV_CH_TOP_CENTER = $00000800;
AV_CH_TOP_FRONT_LEFT = $00001000;
AV_CH_TOP_FRONT_CENTER = $00002000;
AV_CH_TOP_FRONT_RIGHT = $00004000;
AV_CH_TOP_BACK_LEFT = $00008000;
AV_CH_TOP_BACK_CENTER = $00010000;
AV_CH_TOP_BACK_RIGHT = $00020000;
AV_CH_STEREO_LEFT = $20000000; ///< Stereo downmix.
AV_CH_STEREO_RIGHT = $40000000; ///< See AV_CH_STEREO_LEFT.
AV_CH_WIDE_LEFT: cuint64 = $0000000080000000;
AV_CH_WIDE_RIGHT: cuint64 = $0000000100000000;
AV_CH_SURROUND_DIRECT_LEFT: cuint64 = $0000000200000000;
AV_CH_SURROUND_DIRECT_RIGHT: cuint64 = $0000000400000000;
AV_CH_LOW_FREQUENCY_2: cuint64 = $0000000800000000;
(** Channel mask value used for AVCodecContext.request_channel_layout
* to indicate that the user requests the channel order of the decoder output
* to be the native codec channel order.
*)
AV_CH_LAYOUT_NATIVE = $8000000000000000;
(**
* @}
* @defgroup channel_mask_c Audio channel convenience macros
* @{
* *)
AV_CH_LAYOUT_MONO = (AV_CH_FRONT_CENTER);
AV_CH_LAYOUT_STEREO = (AV_CH_FRONT_LEFT or AV_CH_FRONT_RIGHT);
AV_CH_LAYOUT_2POINT1 = (AV_CH_LAYOUT_STEREO or AV_CH_LOW_FREQUENCY);
AV_CH_LAYOUT_2_1 = (AV_CH_LAYOUT_STEREO or AV_CH_BACK_CENTER);
AV_CH_LAYOUT_SURROUND = (AV_CH_LAYOUT_STEREO or AV_CH_FRONT_CENTER);
AV_CH_LAYOUT_3POINT1 = (AV_CH_LAYOUT_SURROUND or AV_CH_LOW_FREQUENCY);
AV_CH_LAYOUT_4POINT0 = (AV_CH_LAYOUT_SURROUND or AV_CH_BACK_CENTER);
AV_CH_LAYOUT_4POINT1 = (AV_CH_LAYOUT_4POINT0 or AV_CH_LOW_FREQUENCY);
AV_CH_LAYOUT_2_2 = (AV_CH_LAYOUT_STEREO or AV_CH_SIDE_LEFT or AV_CH_SIDE_RIGHT);
AV_CH_LAYOUT_QUAD = (AV_CH_LAYOUT_STEREO or AV_CH_BACK_LEFT or AV_CH_BACK_RIGHT);
AV_CH_LAYOUT_5POINT0 = (AV_CH_LAYOUT_SURROUND or AV_CH_SIDE_LEFT or AV_CH_SIDE_RIGHT);
AV_CH_LAYOUT_5POINT1 = (AV_CH_LAYOUT_5POINT0 or AV_CH_LOW_FREQUENCY);
AV_CH_LAYOUT_5POINT0_BACK = (AV_CH_LAYOUT_SURROUND or AV_CH_BACK_LEFT or
AV_CH_BACK_RIGHT);
AV_CH_LAYOUT_5POINT1_BACK = (AV_CH_LAYOUT_5POINT0_BACK or AV_CH_LOW_FREQUENCY);
AV_CH_LAYOUT_6POINT0 = (AV_CH_LAYOUT_5POINT0 or AV_CH_BACK_CENTER);
AV_CH_LAYOUT_6POINT0_FRONT = (AV_CH_LAYOUT_2_2 or AV_CH_FRONT_LEFT_OF_CENTER or
AV_CH_FRONT_RIGHT_OF_CENTER);
AV_CH_LAYOUT_HEXAGONAL = (AV_CH_LAYOUT_5POINT0_BACK or AV_CH_BACK_CENTER);
AV_CH_LAYOUT_6POINT1 = (AV_CH_LAYOUT_5POINT1 or AV_CH_BACK_CENTER);
AV_CH_LAYOUT_6POINT1_BACK = (AV_CH_LAYOUT_5POINT1_BACK or AV_CH_BACK_CENTER);
AV_CH_LAYOUT_6POINT1_FRONT = (AV_CH_LAYOUT_6POINT0_FRONT or AV_CH_LOW_FREQUENCY);
AV_CH_LAYOUT_7POINT0 = (AV_CH_LAYOUT_5POINT0 or AV_CH_BACK_LEFT or AV_CH_BACK_RIGHT);
AV_CH_LAYOUT_7POINT0_FRONT = (AV_CH_LAYOUT_5POINT0 or AV_CH_FRONT_LEFT_OF_CENTER or
AV_CH_FRONT_RIGHT_OF_CENTER);
AV_CH_LAYOUT_7POINT1 = (AV_CH_LAYOUT_5POINT1 or AV_CH_BACK_LEFT or AV_CH_BACK_RIGHT);
AV_CH_LAYOUT_7POINT1_WIDE = (AV_CH_LAYOUT_5POINT1 or AV_CH_FRONT_LEFT_OF_CENTER or
AV_CH_FRONT_RIGHT_OF_CENTER);
AV_CH_LAYOUT_OCTAGONAL = (AV_CH_LAYOUT_5POINT0 or AV_CH_BACK_LEFT or AV_CH_BACK_CENTER or
AV_CH_BACK_RIGHT);
AV_CH_LAYOUT_STEREO_DOWNMIX = (AV_CH_STEREO_LEFT or AV_CH_STEREO_RIGHT);
type
AVMatrixEncoding = (
AV_MATRIX_ENCODING_NONE,
AV_MATRIX_ENCODING_DOLBY,
AV_MATRIX_ENCODING_DPLII,
AV_MATRIX_ENCODING_NB
);
(**
* Return a channel layout id that matches name, or 0 if no match is found.
*
* name can be one or several of the following notations,
* separated by '+' or '|':
* - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
* 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
* - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
* SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
* - a number of channels, in decimal, optionally followed by 'c', yielding
* the default channel layout for that number of channels (@see
* av_get_default_channel_layout);
* - a channel layout mask, in hexadecimal starting with "0x" (see the
* AV_CH_* macros).
*
* Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
*)
function av_get_channel_layout(name: {const} PAnsiChar): cuint64;
cdecl; external av__util;
(**
* Return a description of a channel layout.
* If nb_channels is <= 0, it is guessed from the channel_layout.
*
* @param buf put here the string containing the channel layout
* @param buf_size size in bytes of the buffer
*)
procedure av_get_channel_layout_string(buf: PAnsiChar; buf_size: cint; nb_channels: cint; channel_layout: cuint64);
cdecl; external av__util;
type
// Type definition from libavutil/bprint.h
// The actual record is padded to a certain number of bytes.
// As of now (2013) this number is 1024.
PAVBPrint = ^TAVBPrint;
TAVBPrint = record
case integer of
0 : paddedRecord: array[1..1024] of byte;
1 : begin
str: PAnsiChar; //** string so far */
len: cuint; //** length so far */
size: cuint; //** allocated memory */
size_max: cuint; //** maximum allocated memory */
reserved_internal_buffer: Pchar;
end;
end;
(**
* Append a description of a channel layout to a bprint buffer.
*)
procedure av_bprint_channel_layout(bp: PAVBPrint; nb_channels: cint; channel_layout: cuint64);
cdecl; external av__util;
(**
* Return the number of channels in the channel layout.
*)
function av_get_channel_layout_nb_channels(channel_layout: cuint64): cint;
cdecl; external av__util;
(**
* Return default channel layout for a given number of channels.
*)
function av_get_default_channel_layout(nb_channels: cint): cint64;
cdecl; external av__util;
(**
* Get the index of a channel in channel_layout.
*
* @param channel a channel layout describing exactly one channel which must be
* present in channel_layout.
*
* @return index of channel in channel_layout on success, a negative AVERROR
* on error.
*)
function av_get_channel_layout_channel_index(channel_layout: cuint64;
channel: cuint64): cint;
cdecl; external av__util;
(**
* Get the channel with the given index in channel_layout.
*)
function av_channel_layout_extract_channel(channel_layout: cuint64; index: cint): cuint64;
cdecl; external av__util;
(**
* Get the name of a given channel.
*
* @return channel name on success, NULL on error.
*)
function av_get_channel_name(uint64_t channel: cuint64): PAnsiChar;
cdecl; external av__util;
(**
* Get the description of a given channel.
*
* @param channel a channel layout with a single channel
* @return channel description on success, NULL on error
*)
function av_get_channel_description(uint64_t channel: cuint64): PAnsiChar;
cdecl; external av__util;
(**
* Get the value and name of a standard channel layout.
*
* @param[in] index index in an internal list, starting at 0
* @param[out] layout channel layout mask
* @param[out] name name of the layout
* @return 0 if the layout exists,
* <0 if index is beyond the limits
*)
function av_get_standard_channel_layout(index: cuint; layout: Pcuint64;
name: {const} PPAnsiChar): cint;
cdecl; external av__util;
(** libavcodec/audioconvert.h **)
// type definition from libavcodec/audioconvert.c
type
PAVAudioConvert = ^TAVAudioConvert;
TAVAudioConvert = record
in_channels, out_channels: cint;
fmt_pair: cint;
end;
(**
* Create an audio sample format converter context
* @param out_fmt Output sample format
* @param out_channels Number of output channels
* @param in_fmt Input sample format
* @param in_channels Number of input channels
* @param[in] matrix Channel mixing matrix (of dimension in_channel*out_channels). Set to NULL to ignore.
* @param flags See AV_CPU_FLAG_xx
* @return NULL on error
*)
function av_audio_convert_alloc(out_fmt: TAVSampleFormat; out_channels: cint;
in_fmt: TAVSampleFormat; in_channels: cint;
matrix: {const} Pcfloat; flags: cint): PAVAudioConvert;
cdecl; external av__codec;
(**
* Free audio sample format converter context
*)
procedure av_audio_convert_free(ctx: PAVAudioConvert);
cdecl; external av__codec;
type
P6 = array [1..6] of pointer;
I6 = array [1..6] of cint;
(**
* Convert between audio sample formats
* @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
* @param[in] out_stride distance between consecutive output samples (measured in bytes)
* @param[in] in array of input buffers for each channel
* @param[in] in_stride distance between consecutive input samples (measured in bytes)
* @param len length of audio frame size (measured in samples)
*)
function av_audio_convert(ctx: PAVAudioConvert;
out[6]: {const} P6; out_stride[6]: {const} I6;
in[6]: {const} P6; in_stride[6]: {const} I6; len: cint): cint;
cdecl; external av__codec;
