X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Feac3enc.c;h=f3b4418896a8f3f5f7faeabd1a406e5bc61c7309;hb=df53a473170399bf7bc94b397a1d9f1d50366049;hp=d37acaf20bbd29d38bc6c2bcc6408447dea3e439;hpb=e0cc66df61664bb6f9271d9aae3c778e1f906b4c;p=ffmpeg diff --git a/libavcodec/eac3enc.c b/libavcodec/eac3enc.c index d37acaf20bb..f3b4418896a 100644 --- a/libavcodec/eac3enc.c +++ b/libavcodec/eac3enc.c @@ -27,12 +27,63 @@ #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 AVClass eac3enc_class = { "E-AC-3 Encoder", av_default_item_name, - eac3_options, LIBAVUTIL_VERSION_INT }; +static const AVClass eac3enc_class = { "E-AC-3 Encoder", av_default_item_name, + eac3_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) @@ -43,12 +94,12 @@ 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 { @@ -58,7 +109,7 @@ void ff_eac3_set_cpl_states(AC3EncodeContext *s) } /* 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; @@ -84,22 +135,64 @@ void ff_eac3_output_frame_header(AC3EncodeContext *s) 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 */ @@ -112,7 +205,7 @@ void ff_eac3_output_frame_header(AC3EncodeContext *s) /* 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) @@ -120,21 +213,35 @@ void ff_eac3_output_frame_header(AC3EncodeContext *s) } } /* 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); } @@ -145,7 +252,7 @@ AVCodec ff_eac3_encoder = { .id = CODEC_ID_EAC3, .priv_data_size = sizeof(AC3EncodeContext), .init = ff_ac3_encode_init, - .encode = ff_ac3_encode_frame, + .encode = ff_ac3_float_encode_frame, .close = ff_ac3_encode_close, .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE}, .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52 E-AC-3"),