From 9c0beaf0d3bb72f6e83b3b155a598a9ec28c8468 Mon Sep 17 00:00:00 2001 From: Jan Ekström Date: Sat, 13 Jun 2020 15:05:30 +0300 Subject: avcodec/aacdec_template: add support for 22.2 / channel_config 13 --- libavcodec/aacdec_template.c | 89 ++++++++++++++++++++++++++++++++++++++------ 1 file changed, 78 insertions(+), 11 deletions(-) diff --git a/libavcodec/aacdec_template.c b/libavcodec/aacdec_template.c index 21db12fdab..8c5048cc13 100644 --- a/libavcodec/aacdec_template.c +++ b/libavcodec/aacdec_template.c @@ -387,17 +387,77 @@ static uint64_t sniff_channel_order(uint8_t (*layout_map)[3], int tags) i++; } - // Must choose a stable sort + // The previous checks would end up at 8 at this point for 22.2 + if (tags == 16 && i == 8) { + e2c_vec[i] = (struct elem_to_channel) { + .av_position = AV_CH_TOP_FRONT_CENTER, + .syn_ele = layout_map[i][0], + .elem_id = layout_map[i][1], + .aac_position = layout_map[i][2] + }; i++; + i += assign_pair(e2c_vec, layout_map, i, + AV_CH_TOP_FRONT_LEFT, + AV_CH_TOP_FRONT_RIGHT, + AAC_CHANNEL_FRONT); + i += assign_pair(e2c_vec, layout_map, i, + AV_CH_TOP_SIDE_LEFT, + AV_CH_TOP_SIDE_RIGHT, + AAC_CHANNEL_SIDE); + e2c_vec[i] = (struct elem_to_channel) { + .av_position = AV_CH_TOP_CENTER, + .syn_ele = layout_map[i][0], + .elem_id = layout_map[i][1], + .aac_position = layout_map[i][2] + }; i++; + i += assign_pair(e2c_vec, layout_map, i, + AV_CH_TOP_BACK_LEFT, + AV_CH_TOP_BACK_RIGHT, + AAC_CHANNEL_BACK); + e2c_vec[i] = (struct elem_to_channel) { + .av_position = AV_CH_TOP_BACK_CENTER, + .syn_ele = layout_map[i][0], + .elem_id = layout_map[i][1], + .aac_position = layout_map[i][2] + }; i++; + e2c_vec[i] = (struct elem_to_channel) { + .av_position = AV_CH_BOTTOM_FRONT_CENTER, + .syn_ele = layout_map[i][0], + .elem_id = layout_map[i][1], + .aac_position = layout_map[i][2] + }; i++; + i += assign_pair(e2c_vec, layout_map, i, + AV_CH_BOTTOM_FRONT_LEFT, + AV_CH_BOTTOM_FRONT_RIGHT, + AAC_CHANNEL_FRONT); + } + total_non_cc_elements = n = i; - do { - int next_n = 0; - for (i = 1; i < n; i++) - if (e2c_vec[i - 1].av_position > e2c_vec[i].av_position) { - FFSWAP(struct elem_to_channel, e2c_vec[i - 1], e2c_vec[i]); - next_n = i; - } - n = next_n; - } while (n > 0); + + if (tags == 16 && total_non_cc_elements == 16) { + // For 22.2 reorder the result as needed + FFSWAP(struct elem_to_channel, e2c_vec[2], e2c_vec[0]); // FL & FR first (final), FC third + FFSWAP(struct elem_to_channel, e2c_vec[2], e2c_vec[1]); // FC second (final), FLc & FRc third + FFSWAP(struct elem_to_channel, e2c_vec[6], e2c_vec[2]); // LFE1 third (final), FLc & FRc seventh + FFSWAP(struct elem_to_channel, e2c_vec[4], e2c_vec[3]); // BL & BR fourth (final), SiL & SiR fifth + FFSWAP(struct elem_to_channel, e2c_vec[6], e2c_vec[4]); // FLc & FRc fifth (final), SiL & SiR seventh + FFSWAP(struct elem_to_channel, e2c_vec[7], e2c_vec[6]); // LFE2 seventh (final), SiL & SiR eight (final) + FFSWAP(struct elem_to_channel, e2c_vec[9], e2c_vec[8]); // TpFL & TpFR ninth (final), TFC tenth (final) + FFSWAP(struct elem_to_channel, e2c_vec[11], e2c_vec[10]); // TC eleventh (final), TpSiL & TpSiR twelth + FFSWAP(struct elem_to_channel, e2c_vec[12], e2c_vec[11]); // TpBL & TpBR twelth (final), TpSiL & TpSiR thirteenth (final) + } else { + // For everything else, utilize the AV channel position define as a + // stable sort. + do { + int next_n = 0; + for (i = 1; i < n; i++) + if (e2c_vec[i - 1].av_position > e2c_vec[i].av_position) { + FFSWAP(struct elem_to_channel, e2c_vec[i - 1], e2c_vec[i]); + next_n = i; + } + n = next_n; + } while (n > 0); + + } layout = 0; for (i = 0; i < total_non_cc_elements; i++) { @@ -535,7 +595,7 @@ static int set_default_channel_config(AACContext *ac, AVCodecContext *avctx, int channel_config) { if (channel_config < 1 || (channel_config > 7 && channel_config < 11) || - channel_config > 12) { + channel_config > 13) { av_log(avctx, AV_LOG_ERROR, "invalid default channel configuration (%d)\n", channel_config); @@ -615,6 +675,13 @@ static ChannelElement *get_che(AACContext *ac, int type, int elem_id) /* For indexed channel configurations map the channels solely based * on position. */ switch (ac->oc[1].m4ac.chan_config) { + case 13: + if (ac->tags_mapped > 3 && ((type == TYPE_CPE && elem_id < 8) || + (type == TYPE_SCE && elem_id < 6) || + (type == TYPE_LFE && elem_id < 2))) { + ac->tags_mapped++; + return ac->tag_che_map[type][elem_id] = ac->che[type][elem_id]; + } case 12: case 7: if (ac->tags_mapped == 3 && type == TYPE_CPE) { -- cgit v1.2.3