#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 = { "E-AC-3 Encoder", av_default_item_name,
- eac3_options, LIBAVUTIL_VERSION_INT };
+ ac3_options, 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)
/* set first cpl coords */
for (ch = 1; ch <= s->fbw_channels; ch++)
first_cpl_coords[ch] = 1;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ 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 = 2;
+ block->new_cpl_coords[ch] = 2;
first_cpl_coords[ch] = 0;
}
} else {
}
/* set first cpl leak */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
if (block->cpl_in_use) {
block->new_cpl_leak = 2;
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, 0x3); /* number of blocks = 6 */
+ 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 */
- put_bits(&s->pb, 1, 0); /* no mixing metadata */
- /* TODO: mixing metadata */
- put_bits(&s->pb, 1, 0); /* no info metadata */
- /* TODO: info metadata */
+ /* 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 */
- put_bits(&s->pb, 1, 1); /* exponent strategy syntax = each block */
+ 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 */
/* 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 < AC3_MAX_BLOCKS; blk++) {
+ 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)
}
}
/* exponent strategy */
- for (blk = 0; blk < AC3_MAX_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->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 < AC3_MAX_BLOCKS; blk++)
+ 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 (unfortunately not optional...) */
- for (ch = 1; ch <= s->fbw_channels; ch++)
- put_bits(&s->pb, 5, 0);
+ /* 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 */
- put_bits(&s->pb, 1, 0);
+ if (s->num_blocks > 1)
+ put_bits(&s->pb, 1, 0);
}
AVCodec ff_eac3_encoder = {
.name = "eac3",
.type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_EAC3,
+ .id = AV_CODEC_ID_EAC3,
.priv_data_size = sizeof(AC3EncodeContext),
.init = ff_ac3_encode_init,
- .encode = ff_ac3_float_encode_frame,
+ .encode2 = ff_ac3_float_encode_frame,
.close = ff_ac3_encode_close,
- .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
+ .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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