|
FFmpeg
|
All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
|
FFmpeg
|
#include "avcodec.h"#include "internal.h"#include "put_bits.h"#include "audio_frame_queue.h"#include "libavutil/crc.h"#include "libavutil/avstring.h"#include "libavutil/samplefmt.h"#include "mlp.h"#include "lpc.h"Go to the source code of this file.
Data Structures | |
| struct | RestartHeader |
| struct | MatrixParams |
| struct | DecodingParams |
| struct | BestOffset |
| struct | MLPEncodeContext |
| struct | PathCounter |
Macros | |
| #define | MAJOR_HEADER_INTERVAL 16 |
| MLP encoder Copyright (c) 2008 Ramiro Polla. More... | |
| #define | MLP_MIN_LPC_ORDER 1 |
| #define | MLP_MAX_LPC_ORDER 8 |
| #define | MLP_MIN_LPC_SHIFT 8 |
| #define | MLP_MAX_LPC_SHIFT 15 |
| #define | HUFF_OFFSET_MIN -16384 |
| #define | HUFF_OFFSET_MAX 16383 |
| #define | NUM_CODEBOOKS 4 |
| Number of possible codebooks (counting "no codebooks") More... | |
| #define | SYNC_MAJOR 0xf8726f |
| #define | MAJOR_SYNC_INFO_SIGNATURE 0xB752 |
| #define | SYNC_MLP 0xbb |
| #define | SYNC_TRUEHD 0xba |
| #define | FLAGS_DVDA 0x4000 |
| #define | FLAGS_CONST 0x8000 |
| #define | SUBSTREAM_INFO_MAX_2_CHAN 0x01 |
| #define | SUBSTREAM_INFO_HIGH_RATE 0x02 |
| #define | SUBSTREAM_INFO_ALWAYS_SET 0x04 |
| #define | SUBSTREAM_INFO_2_SUBSTREAMS 0x08 |
| #define | SAMPLE_MAX(bitdepth) ((1 << (bitdepth - 1)) - 1) |
| #define | SAMPLE_MIN(bitdepth) (~SAMPLE_MAX(bitdepth)) |
| #define | MSB_MASK(bits) (-1u << bits) |
| #define | ZERO_PATH '0' |
| #define | CODEBOOK_CHANGE_BITS 21 |
Enumerations | |
| enum | ParamFlags { PARAMS_DEFAULT = 0xff, PARAM_PRESENCE_FLAGS = 1 << 8, PARAM_BLOCKSIZE = 1 << 7, PARAM_MATRIX = 1 << 6, PARAM_OUTSHIFT = 1 << 5, PARAM_QUANTSTEP = 1 << 4, PARAM_FIR = 1 << 3, PARAM_IIR = 1 << 2, PARAM_HUFFOFFSET = 1 << 1, PARAM_PRESENT = 1 << 0 } |
| enum | InputBitDepth { BITS_16, BITS_20, BITS_24 } |
| enum | MLPChMode { MLP_CHMODE_LEFT_RIGHT, MLP_CHMODE_LEFT_SIDE, MLP_CHMODE_RIGHT_SIDE, MLP_CHMODE_MID_SIDE } |
Functions | |
| static int | compare_filter_params (const ChannelParams *prev_cp, const ChannelParams *cp, int filter) |
| Compares two FilterParams structures and returns 1 if anything has changed. More... | |
| static int | compare_matrix_params (MLPEncodeContext *ctx, const MatrixParams *prev, const MatrixParams *mp) |
| Compare two primitive matrices and returns 1 if anything has changed. More... | |
| static int | compare_decoding_params (MLPEncodeContext *ctx) |
| Compares two DecodingParams and ChannelParams structures to decide if a new decoding params header has to be written. More... | |
| static void | copy_filter_params (ChannelParams *dst_cp, ChannelParams *src_cp, int filter) |
| static void | copy_matrix_params (MatrixParams *dst, MatrixParams *src) |
| static void | copy_restart_frame_params (MLPEncodeContext *ctx, unsigned int substr) |
| static void | clear_decoding_params (MLPEncodeContext *ctx, DecodingParams decoding_params[MAX_SUBSTREAMS]) |
| Clears a DecodingParams struct the way it should be after a restart header. More... | |
| static void | clear_channel_params (MLPEncodeContext *ctx, ChannelParams channel_params[MAX_CHANNELS]) |
| Clears a ChannelParams struct the way it should be after a restart header. More... | |
| static void | default_decoding_params (MLPEncodeContext *ctx, DecodingParams decoding_params[MAX_SUBSTREAMS]) |
| Sets default vales in our encoder for a DecodingParams struct. More... | |
| static int | number_sbits (int number) |
| Calculates the smallest number of bits it takes to encode a given signed value in two's complement. More... | |
| static int | mlp_peak_bitrate (int peak_bitrate, int sample_rate) |
| static av_cold int | mlp_encode_init (AVCodecContext *avctx) |
| static void | write_major_sync (MLPEncodeContext *ctx, uint8_t *buf, int buf_size) |
| Writes a major sync header to the bitstream. More... | |
| static void | write_restart_header (MLPEncodeContext *ctx, PutBitContext *pb) |
| Writes a restart header to the bitstream. More... | |
| static void | write_matrix_params (MLPEncodeContext *ctx, PutBitContext *pb) |
| Writes matrix params for all primitive matrices to the bitstream. More... | |
| static void | write_filter_params (MLPEncodeContext *ctx, PutBitContext *pb, unsigned int channel, unsigned int filter) |
| Writes filter parameters for one filter to the bitstream. More... | |
| static void | write_decoding_params (MLPEncodeContext *ctx, PutBitContext *pb, int params_changed) |
| Writes decoding parameters to the bitstream. More... | |
| static void | write_block_data (MLPEncodeContext *ctx, PutBitContext *pb) |
| Writes the residuals to the bitstream. More... | |
| static uint8_t * | write_substrs (MLPEncodeContext *ctx, uint8_t *buf, int buf_size, int restart_frame, uint16_t substream_data_len[MAX_SUBSTREAMS]) |
| Writes the substreams data to the bitstream. More... | |
| static void | write_frame_headers (MLPEncodeContext *ctx, uint8_t *frame_header, uint8_t *substream_headers, unsigned int length, int restart_frame, uint16_t substream_data_len[MAX_SUBSTREAMS]) |
| Writes the access unit and substream headers to the bitstream. More... | |
| static unsigned int | write_access_unit (MLPEncodeContext *ctx, uint8_t *buf, int buf_size, int restart_frame) |
| Writes an entire access unit to the bitstream. More... | |
| static void | input_data_internal (MLPEncodeContext *ctx, const uint8_t *samples, int is24) |
| Inputs data from the samples passed by lavc into the context, shifts them appropriately depending on the bit-depth, and calculates the lossless_check_data that will be written to the restart header. More... | |
| static void | input_data (MLPEncodeContext *ctx, void *samples) |
| Wrapper function for inputting data in two different bit-depths. More... | |
| static void | input_to_sample_buffer (MLPEncodeContext *ctx) |
| static int | number_trailing_zeroes (int32_t sample) |
| Counts the number of trailing zeroes in a value. More... | |
| static void | determine_quant_step_size (MLPEncodeContext *ctx) |
| Determines how many bits are zero at the end of all samples so they can be shifted out. More... | |
| static void | code_filter_coeffs (MLPEncodeContext *ctx, FilterParams *fp, int32_t *fcoeff) |
| Determines the smallest number of bits needed to encode the filter coefficients, and if it's possible to right-shift their values without losing any precision. More... | |
| static void | set_filter_params (MLPEncodeContext *ctx, unsigned int channel, unsigned int filter, int clear_filter) |
| Determines the best filter parameters for the given data and writes the necessary information to the context. More... | |
| static void | determine_filters (MLPEncodeContext *ctx) |
| Tries to determine a good prediction filter, and applies it to the samples buffer if the filter is good enough. More... | |
| static enum MLPChMode | estimate_stereo_mode (MLPEncodeContext *ctx) |
| static void | code_matrix_coeffs (MLPEncodeContext *ctx, unsigned int mat) |
| Determines how many fractional bits are needed to encode matrix coefficients. More... | |
| static void | lossless_matrix_coeffs (MLPEncodeContext *ctx) |
| Determines best coefficients to use for the lossless matrix. More... | |
| static void | no_codebook_bits_offset (MLPEncodeContext *ctx, unsigned int channel, int16_t offset, int32_t min, int32_t max, BestOffset *bo) |
| Determines the amount of bits needed to encode the samples using no codebooks and a specified offset. More... | |
| static void | no_codebook_bits (MLPEncodeContext *ctx, unsigned int channel, int32_t min, int32_t max, BestOffset *bo) |
| Determines the least amount of bits needed to encode the samples using no codebooks. More... | |
| static void | codebook_bits_offset (MLPEncodeContext *ctx, unsigned int channel, int codebook, int32_t sample_min, int32_t sample_max, int16_t offset, BestOffset *bo) |
| Determines the least amount of bits needed to encode the samples using a given codebook and a given offset. More... | |
| static void | codebook_bits (MLPEncodeContext *ctx, unsigned int channel, int codebook, int offset, int32_t min, int32_t max, BestOffset *bo, int direction) |
| Determines the least amount of bits needed to encode the samples using a given codebook. More... | |
| static void | determine_bits (MLPEncodeContext *ctx) |
| Determines the least amount of bits needed to encode the samples using any or no codebook. More... | |
| static int | apply_filter (MLPEncodeContext *ctx, unsigned int channel) |
| Applies the filter to the current samples, and saves the residual back into the samples buffer. More... | |
| static void | apply_filters (MLPEncodeContext *ctx) |
| static void | generate_2_noise_channels (MLPEncodeContext *ctx) |
| Generates two noise channels worth of data. More... | |
| static void | rematrix_channels (MLPEncodeContext *ctx) |
| Rematrixes all channels using chosen coefficients. More... | |
| static void | clear_path_counter (PathCounter *path_counter) |
| static int | compare_best_offset (BestOffset *prev, BestOffset *cur) |
| static int | best_codebook_path_cost (MLPEncodeContext *ctx, unsigned int channel, PathCounter *src, int cur_codebook) |
| static void | set_best_codebook (MLPEncodeContext *ctx) |
| static void | set_major_params (MLPEncodeContext *ctx) |
| Analyzes all collected bitcounts and selects the best parameters for each individual access unit. More... | |
| static void | analyze_sample_buffer (MLPEncodeContext *ctx) |
| static void | process_major_frame (MLPEncodeContext *ctx) |
| static int | mlp_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet) |
| static av_cold int | mlp_encode_close (AVCodecContext *avctx) |
Variables | |
| static ChannelParams | restart_channel_params [MAX_CHANNELS] |
| static DecodingParams | restart_decoding_params [MAX_SUBSTREAMS] |
| static BestOffset | restart_best_offset [NUM_CODEBOOKS] = {{0}} |
| static const int | codebook_extremes [3][2] |
| Min and max values that can be encoded with each codebook. More... | |
| static const char * | path_counter_codebook [] = { "0", "1", "2", "3", } |
| #define MAJOR_HEADER_INTERVAL 16 |
MLP encoder Copyright (c) 2008 Ramiro Polla.
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
Definition at line 32 of file mlpenc.c.
Referenced by mlp_encode_init(), and set_major_params().
| #define MLP_MIN_LPC_ORDER 1 |
Definition at line 34 of file mlpenc.c.
Referenced by set_filter_params().
| #define MLP_MAX_LPC_ORDER 8 |
Definition at line 35 of file mlpenc.c.
Referenced by mlp_encode_init(), and set_filter_params().
| #define MLP_MIN_LPC_SHIFT 8 |
Definition at line 36 of file mlpenc.c.
Referenced by set_filter_params().
| #define MLP_MAX_LPC_SHIFT 15 |
Definition at line 37 of file mlpenc.c.
Referenced by set_filter_params().
| #define HUFF_OFFSET_MIN -16384 |
Definition at line 96 of file mlpenc.c.
Referenced by codebook_bits(), codebook_bits_offset(), determine_bits(), and no_codebook_bits().
| #define HUFF_OFFSET_MAX 16383 |
Definition at line 97 of file mlpenc.c.
Referenced by codebook_bits(), codebook_bits_offset(), determine_bits(), and no_codebook_bits().
| #define NUM_CODEBOOKS 4 |
Number of possible codebooks (counting "no codebooks")
Definition at line 100 of file mlpenc.c.
Referenced by clear_path_counter(), determine_bits(), and set_best_codebook().
| #define SYNC_MAJOR 0xf8726f |
Definition at line 207 of file mlpenc.c.
Referenced by write_major_sync().
| #define MAJOR_SYNC_INFO_SIGNATURE 0xB752 |
Definition at line 208 of file mlpenc.c.
Referenced by write_major_sync().
| #define SYNC_MLP 0xbb |
Definition at line 210 of file mlpenc.c.
Referenced by write_major_sync().
| #define SYNC_TRUEHD 0xba |
Definition at line 211 of file mlpenc.c.
Referenced by write_major_sync().
| #define FLAGS_DVDA 0x4000 |
Definition at line 214 of file mlpenc.c.
Referenced by mlp_encode_init().
| #define SUBSTREAM_INFO_MAX_2_CHAN 0x01 |
Definition at line 218 of file mlpenc.c.
Referenced by mlp_encode_init().
| #define SUBSTREAM_INFO_HIGH_RATE 0x02 |
Definition at line 219 of file mlpenc.c.
Referenced by mlp_encode_init(), and set_filter_params().
| #define SUBSTREAM_INFO_ALWAYS_SET 0x04 |
Definition at line 220 of file mlpenc.c.
Referenced by mlp_encode_init().
| #define SAMPLE_MAX | ( | bitdepth | ) | ((1 << (bitdepth - 1)) - 1) |
Definition at line 1796 of file mlpenc.c.
Referenced by apply_filter().
| #define SAMPLE_MIN | ( | bitdepth | ) | (~SAMPLE_MAX(bitdepth)) |
Definition at line 1797 of file mlpenc.c.
Referenced by apply_filter().
| #define MSB_MASK | ( | bits | ) | (-1u << bits) |
Definition at line 1799 of file mlpenc.c.
Referenced by apply_filter(), and rematrix_channels().
| #define ZERO_PATH '0' |
Definition at line 1953 of file mlpenc.c.
Referenced by best_codebook_path_cost(), clear_path_counter(), and set_best_codebook().
| #define CODEBOOK_CHANGE_BITS 21 |
Definition at line 1954 of file mlpenc.c.
Referenced by best_codebook_path_cost().
| enum ParamFlags |
| enum InputBitDepth |
| enum MLPChMode |
|
static |
Compares two FilterParams structures and returns 1 if anything has changed.
Returns 0 if they are both equal.
Definition at line 230 of file mlpenc.c.
Referenced by compare_decoding_params().
|
static |
Compare two primitive matrices and returns 1 if anything has changed.
Returns 0 if they are both equal.
Definition at line 255 of file mlpenc.c.
Referenced by compare_decoding_params().
|
static |
Compares two DecodingParams and ChannelParams structures to decide if a new decoding params header has to be written.
Definition at line 285 of file mlpenc.c.
Referenced by set_major_params().
|
static |
Definition at line 339 of file mlpenc.c.
Referenced by copy_restart_frame_params().
|
static |
Definition at line 358 of file mlpenc.c.
Referenced by copy_restart_frame_params().
|
static |
Definition at line 379 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Clears a DecodingParams struct the way it should be after a restart header.
Definition at line 405 of file mlpenc.c.
Referenced by default_decoding_params(), and mlp_encode_init().
|
static |
Clears a ChannelParams struct the way it should be after a restart header.
Definition at line 421 of file mlpenc.c.
Referenced by mlp_encode_frame(), and mlp_encode_init().
|
static |
Sets default vales in our encoder for a DecodingParams struct.
Definition at line 438 of file mlpenc.c.
Referenced by mlp_encode_frame().
Calculates the smallest number of bits it takes to encode a given signed value in two's complement.
Definition at line 467 of file mlpenc.c.
Referenced by code_filter_coeffs(), input_data_internal(), no_codebook_bits(), and no_codebook_bits_offset().
Definition at line 481 of file mlpenc.c.
Referenced by mlp_encode_init().
|
static |
|
static |
Writes a major sync header to the bitstream.
Definition at line 748 of file mlpenc.c.
Referenced by write_access_unit().
|
static |
Writes a restart header to the bitstream.
Damaged streams can start being decoded losslessly again after such a header and the subsequent decoding params header.
Definition at line 807 of file mlpenc.c.
Referenced by write_substrs().
|
static |
Writes matrix params for all primitive matrices to the bitstream.
Definition at line 844 of file mlpenc.c.
Referenced by write_decoding_params().
|
static |
Writes filter parameters for one filter to the bitstream.
Definition at line 876 of file mlpenc.c.
Referenced by write_decoding_params().
|
static |
Writes decoding parameters to the bitstream.
These change very often, usually at almost every frame.
Definition at line 903 of file mlpenc.c.
Referenced by write_substrs().
|
static |
Writes the residuals to the bitstream.
That is, the VLC codes from the codebooks (if any is used), and then the residual.
Definition at line 1001 of file mlpenc.c.
Referenced by write_substrs().
|
static |
Writes the substreams data to the bitstream.
Definition at line 1052 of file mlpenc.c.
Referenced by write_access_unit().
|
static |
Writes the access unit and substream headers to the bitstream.
Definition at line 1144 of file mlpenc.c.
Referenced by write_access_unit().
|
static |
Writes an entire access unit to the bitstream.
Definition at line 1183 of file mlpenc.c.
Referenced by mlp_encode_frame().
|
static |
Inputs data from the samples passed by lavc into the context, shifts them appropriately depending on the bit-depth, and calculates the lossless_check_data that will be written to the restart header.
Definition at line 1231 of file mlpenc.c.
Referenced by input_data().
|
static |
Wrapper function for inputting data in two different bit-depths.
Definition at line 1275 of file mlpenc.c.
Referenced by apng_do_inverse_blend(), and mlp_encode_frame().
|
static |
Definition at line 1283 of file mlpenc.c.
Referenced by mlp_encode_frame().
Counts the number of trailing zeroes in a value.
Definition at line 1307 of file mlpenc.c.
Referenced by determine_quant_step_size().
|
static |
Determines how many bits are zero at the end of all samples so they can be shifted out.
Definition at line 1324 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Determines the smallest number of bits needed to encode the filter coefficients, and if it's possible to right-shift their values without losing any precision.
Definition at line 1351 of file mlpenc.c.
Referenced by set_filter_params().
|
static |
Determines the best filter parameters for the given data and writes the necessary information to the context.
TODO Add IIR filter predictor!
Definition at line 1381 of file mlpenc.c.
Referenced by apply_filters(), and determine_filters().
|
static |
Tries to determine a good prediction filter, and applies it to the samples buffer if the filter is good enough.
Sets the filter data to be cleared if no good filter was found.
Definition at line 1429 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Definition at line 1447 of file mlpenc.c.
Referenced by lossless_matrix_coeffs().
|
static |
Determines how many fractional bits are needed to encode matrix coefficients.
Also shifts the coefficients to fit within 2.14 bits.
Definition at line 1480 of file mlpenc.c.
Referenced by lossless_matrix_coeffs().
|
static |
Determines best coefficients to use for the lossless matrix.
Definition at line 1499 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Determines the amount of bits needed to encode the samples using no codebooks and a specified offset.
Definition at line 1559 of file mlpenc.c.
Referenced by determine_bits().
|
static |
Determines the least amount of bits needed to encode the samples using no codebooks.
Definition at line 1587 of file mlpenc.c.
Referenced by determine_bits().
|
inlinestatic |
Determines the least amount of bits needed to encode the samples using a given codebook and a given offset.
Definition at line 1626 of file mlpenc.c.
Referenced by codebook_bits(), and determine_bits().
|
inlinestatic |
Determines the least amount of bits needed to encode the samples using a given codebook.
Searches for the best offset to minimize the bits.
Definition at line 1690 of file mlpenc.c.
Referenced by determine_bits().
|
static |
Determines the least amount of bits needed to encode the samples using any or no codebook.
Definition at line 1734 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Applies the filter to the current samples, and saves the residual back into the samples buffer.
If the filter is too bad and overflows the maximum amount of bits allowed (16 or 24), the samples buffer is left as is and the function returns -1.
Definition at line 1806 of file mlpenc.c.
Referenced by apply_filters(), and process_major_frame().
|
static |
Definition at line 1874 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Generates two noise channels worth of data.
Definition at line 1891 of file mlpenc.c.
Referenced by analyze_sample_buffer(), and process_major_frame().
|
static |
Rematrixes all channels using chosen coefficients.
Definition at line 1912 of file mlpenc.c.
Referenced by analyze_sample_buffer(), and process_major_frame().
|
static |
Definition at line 1956 of file mlpenc.c.
Referenced by set_best_codebook().
|
static |
Definition at line 1967 of file mlpenc.c.
Referenced by best_codebook_path_cost(), and set_best_codebook().
|
static |
Definition at line 1975 of file mlpenc.c.
Referenced by set_best_codebook().
|
static |
Definition at line 2000 of file mlpenc.c.
Referenced by analyze_sample_buffer().
|
static |
Analyzes all collected bitcounts and selects the best parameters for each individual access unit.
TODO This is just a stub!
Definition at line 2083 of file mlpenc.c.
Referenced by mlp_encode_frame().
|
static |
Definition at line 2143 of file mlpenc.c.
Referenced by mlp_encode_frame().
|
static |
Definition at line 2191 of file mlpenc.c.
Referenced by mlp_encode_frame().
|
static |
|
static |
|
static |
Definition at line 203 of file mlpenc.c.
Referenced by set_major_params().
|
static |
|
static |
Definition at line 205 of file mlpenc.c.
Referenced by best_codebook_path_cost(), and set_best_codebook().
|
static |
Min and max values that can be encoded with each codebook.
The values for the third codebook take into account the fact that the sign shift for this codebook is outside the coded value, so it has one more bit of precision. It should actually be -7 -> 7, shifted down by 0.5.
Definition at line 1552 of file mlpenc.c.
Referenced by codebook_bits_offset().
|
static |
Definition at line 1951 of file mlpenc.c.
Referenced by set_best_codebook().
1.8.6