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Diffstat (limited to 'ffmpeg1/libavcodec/eac3enc.c')
-rw-r--r--ffmpeg1/libavcodec/eac3enc.c268
1 files changed, 0 insertions, 268 deletions
diff --git a/ffmpeg1/libavcodec/eac3enc.c b/ffmpeg1/libavcodec/eac3enc.c
deleted file mode 100644
index bb9ef4f..0000000
--- a/ffmpeg1/libavcodec/eac3enc.c
+++ /dev/null
@@ -1,268 +0,0 @@
-/*
- * E-AC-3 encoder
- * Copyright (c) 2011 Justin Ruggles <justin.ruggles@gmail.com>
- *
- * This file is part of Libav.
- *
- * 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.
- *
- * 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * E-AC-3 encoder
- */
-
-#define CONFIG_AC3ENC_FLOAT 1
-#include "ac3enc.h"
-#include "eac3enc.h"
-#include "eac3_data.h"
-
-
-#define AC3ENC_TYPE AC3ENC_TYPE_EAC3
-#include "ac3enc_opts_template.c"
-
-static const AVClass eac3enc_class = {
- .class_name = "E-AC-3 Encoder",
- .item_name = av_default_item_name,
- .option = ac3_options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-/**
- * LUT for finding a matching frame exponent strategy index from a set of
- * exponent strategies for a single channel across all 6 blocks.
- */
-static int8_t eac3_frame_expstr_index_tab[3][4][4][4][4][4];
-
-
-void ff_eac3_exponent_init(void)
-{
- int i;
-
- memset(eac3_frame_expstr_index_tab, -1, sizeof(eac3_frame_expstr_index_tab));
- for (i = 0; i < 32; i++) {
- eac3_frame_expstr_index_tab[ff_eac3_frm_expstr[i][0]-1]
- [ff_eac3_frm_expstr[i][1]]
- [ff_eac3_frm_expstr[i][2]]
- [ff_eac3_frm_expstr[i][3]]
- [ff_eac3_frm_expstr[i][4]]
- [ff_eac3_frm_expstr[i][5]] = i;
- }
-}
-
-
-void ff_eac3_get_frame_exp_strategy(AC3EncodeContext *s)
-{
- int ch;
-
- if (s->num_blocks < 6) {
- s->use_frame_exp_strategy = 0;
- return;
- }
-
- s->use_frame_exp_strategy = 1;
- for (ch = !s->cpl_on; ch <= s->fbw_channels; ch++) {
- int expstr = eac3_frame_expstr_index_tab[s->exp_strategy[ch][0]-1]
- [s->exp_strategy[ch][1]]
- [s->exp_strategy[ch][2]]
- [s->exp_strategy[ch][3]]
- [s->exp_strategy[ch][4]]
- [s->exp_strategy[ch][5]];
- if (expstr < 0) {
- s->use_frame_exp_strategy = 0;
- break;
- }
- s->frame_exp_strategy[ch] = expstr;
- }
-}
-
-
-
-void ff_eac3_set_cpl_states(AC3EncodeContext *s)
-{
- int ch, blk;
- int first_cpl_coords[AC3_MAX_CHANNELS];
-
- /* set first cpl coords */
- for (ch = 1; ch <= s->fbw_channels; ch++)
- first_cpl_coords[ch] = 1;
- for (blk = 0; blk < s->num_blocks; blk++) {
- AC3Block *block = &s->blocks[blk];
- for (ch = 1; ch <= s->fbw_channels; ch++) {
- if (block->channel_in_cpl[ch]) {
- if (first_cpl_coords[ch]) {
- block->new_cpl_coords[ch] = 2;
- first_cpl_coords[ch] = 0;
- }
- } else {
- first_cpl_coords[ch] = 1;
- }
- }
- }
-
- /* set first cpl leak */
- for (blk = 0; blk < s->num_blocks; blk++) {
- AC3Block *block = &s->blocks[blk];
- if (block->cpl_in_use) {
- block->new_cpl_leak = 2;
- break;
- }
- }
-}
-
-
-void ff_eac3_output_frame_header(AC3EncodeContext *s)
-{
- int blk, ch;
- AC3EncOptions *opt = &s->options;
-
- put_bits(&s->pb, 16, 0x0b77); /* sync word */
-
- /* BSI header */
- put_bits(&s->pb, 2, 0); /* stream type = independent */
- put_bits(&s->pb, 3, 0); /* substream id = 0 */
- put_bits(&s->pb, 11, (s->frame_size / 2) - 1); /* frame size */
- if (s->bit_alloc.sr_shift) {
- put_bits(&s->pb, 2, 0x3); /* fscod2 */
- put_bits(&s->pb, 2, s->bit_alloc.sr_code); /* sample rate code */
- } else {
- put_bits(&s->pb, 2, s->bit_alloc.sr_code); /* sample rate code */
- put_bits(&s->pb, 2, s->num_blks_code); /* number of blocks */
- }
- put_bits(&s->pb, 3, s->channel_mode); /* audio coding mode */
- put_bits(&s->pb, 1, s->lfe_on); /* LFE channel indicator */
- put_bits(&s->pb, 5, s->bitstream_id); /* bitstream id (EAC3=16) */
- put_bits(&s->pb, 5, -opt->dialogue_level); /* dialogue normalization level */
- put_bits(&s->pb, 1, 0); /* no compression gain */
- /* mixing metadata*/
- put_bits(&s->pb, 1, opt->eac3_mixing_metadata);
- if (opt->eac3_mixing_metadata) {
- if (s->channel_mode > AC3_CHMODE_STEREO)
- put_bits(&s->pb, 2, opt->preferred_stereo_downmix);
- if (s->has_center) {
- put_bits(&s->pb, 3, s->ltrt_center_mix_level);
- put_bits(&s->pb, 3, s->loro_center_mix_level);
- }
- if (s->has_surround) {
- put_bits(&s->pb, 3, s->ltrt_surround_mix_level);
- put_bits(&s->pb, 3, s->loro_surround_mix_level);
- }
- if (s->lfe_on)
- put_bits(&s->pb, 1, 0);
- put_bits(&s->pb, 1, 0); /* no program scale */
- put_bits(&s->pb, 1, 0); /* no ext program scale */
- put_bits(&s->pb, 2, 0); /* no mixing parameters */
- if (s->channel_mode < AC3_CHMODE_STEREO)
- put_bits(&s->pb, 1, 0); /* no pan info */
- put_bits(&s->pb, 1, 0); /* no frame mix config info */
- }
- /* info metadata*/
- put_bits(&s->pb, 1, opt->eac3_info_metadata);
- if (opt->eac3_info_metadata) {
- put_bits(&s->pb, 3, s->bitstream_mode);
- put_bits(&s->pb, 1, opt->copyright);
- put_bits(&s->pb, 1, opt->original);
- if (s->channel_mode == AC3_CHMODE_STEREO) {
- put_bits(&s->pb, 2, opt->dolby_surround_mode);
- put_bits(&s->pb, 2, opt->dolby_headphone_mode);
- }
- if (s->channel_mode >= AC3_CHMODE_2F2R)
- put_bits(&s->pb, 2, opt->dolby_surround_ex_mode);
- put_bits(&s->pb, 1, opt->audio_production_info);
- if (opt->audio_production_info) {
- put_bits(&s->pb, 5, opt->mixing_level - 80);
- put_bits(&s->pb, 2, opt->room_type);
- put_bits(&s->pb, 1, opt->ad_converter_type);
- }
- put_bits(&s->pb, 1, 0);
- }
- if (s->num_blocks != 6)
- put_bits(&s->pb, 1, !(s->avctx->frame_number % 6)); /* converter sync flag */
- put_bits(&s->pb, 1, 0); /* no additional bit stream info */
-
- /* frame header */
- if (s->num_blocks == 6) {
- put_bits(&s->pb, 1, !s->use_frame_exp_strategy);/* exponent strategy syntax */
- put_bits(&s->pb, 1, 0); /* aht enabled = no */
- }
- put_bits(&s->pb, 2, 0); /* snr offset strategy = 1 */
- put_bits(&s->pb, 1, 0); /* transient pre-noise processing enabled = no */
- put_bits(&s->pb, 1, 0); /* block switch syntax enabled = no */
- put_bits(&s->pb, 1, 0); /* dither flag syntax enabled = no */
- put_bits(&s->pb, 1, 0); /* bit allocation model syntax enabled = no */
- put_bits(&s->pb, 1, 0); /* fast gain codes enabled = no */
- put_bits(&s->pb, 1, 0); /* dba syntax enabled = no */
- put_bits(&s->pb, 1, 0); /* skip field syntax enabled = no */
- put_bits(&s->pb, 1, 0); /* spx enabled = no */
- /* coupling strategy use flags */
- if (s->channel_mode > AC3_CHMODE_MONO) {
- put_bits(&s->pb, 1, s->blocks[0].cpl_in_use);
- for (blk = 1; blk < s->num_blocks; blk++) {
- AC3Block *block = &s->blocks[blk];
- put_bits(&s->pb, 1, block->new_cpl_strategy);
- if (block->new_cpl_strategy)
- put_bits(&s->pb, 1, block->cpl_in_use);
- }
- }
- /* exponent strategy */
- if (s->use_frame_exp_strategy) {
- for (ch = !s->cpl_on; ch <= s->fbw_channels; ch++)
- put_bits(&s->pb, 5, s->frame_exp_strategy[ch]);
- } else {
- for (blk = 0; blk < s->num_blocks; blk++)
- for (ch = !s->blocks[blk].cpl_in_use; ch <= s->fbw_channels; ch++)
- put_bits(&s->pb, 2, s->exp_strategy[ch][blk]);
- }
- if (s->lfe_on) {
- for (blk = 0; blk < s->num_blocks; blk++)
- put_bits(&s->pb, 1, s->exp_strategy[s->lfe_channel][blk]);
- }
- /* E-AC-3 to AC-3 converter exponent strategy (not optional when num blocks == 6) */
- if (s->num_blocks != 6) {
- put_bits(&s->pb, 1, 0);
- } else {
- for (ch = 1; ch <= s->fbw_channels; ch++) {
- if (s->use_frame_exp_strategy)
- put_bits(&s->pb, 5, s->frame_exp_strategy[ch]);
- else
- put_bits(&s->pb, 5, 0);
- }
- }
- /* snr offsets */
- put_bits(&s->pb, 6, s->coarse_snr_offset);
- put_bits(&s->pb, 4, s->fine_snr_offset[1]);
- /* block start info */
- if (s->num_blocks > 1)
- put_bits(&s->pb, 1, 0);
-}
-
-
-#if CONFIG_EAC3_ENCODER
-AVCodec ff_eac3_encoder = {
- .name = "eac3",
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_EAC3,
- .priv_data_size = sizeof(AC3EncodeContext),
- .init = ff_ac3_encode_init,
- .encode2 = ff_ac3_float_encode_frame,
- .close = ff_ac3_encode_close,
- .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
- AV_SAMPLE_FMT_NONE },
- .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52 E-AC-3"),
- .priv_class = &eac3enc_class,
- .channel_layouts = ff_ac3_channel_layouts,
- .defaults = ac3_defaults,
-};
-#endif
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