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| author | Paul B Mahol <onemda@gmail.com> | 2022-09-20 17:07:15 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2022-09-21 09:22:08 +0200 |
| commit | acbb2777e28c462d38f774d317e6cd3ad2a0b215 (patch) | |
| tree | 52c7b72a0071264802691ed213679eacd552e994 /libavcodec/ac3dec.c | |
| parent | 0744782de3ee37fc2b8d9db73ec15d774165b4e5 (diff) | |
| download | ffmpeg-acbb2777e28c462d38f774d317e6cd3ad2a0b215.tar.gz | |
avcodec/ac3dec: add downmix support for mono and stereo for eac3 7.1
Diffstat (limited to 'libavcodec/ac3dec.c')
| -rw-r--r-- | libavcodec/ac3dec.c | 55 |
1 files changed, 32 insertions, 23 deletions
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index 5d0add40fe..f628eae33c 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -183,6 +183,33 @@ static av_cold void ac3_tables_init(void) #endif } +static void ac3_downmix(AVCodecContext *avctx) +{ + AC3DecodeContext *s = avctx->priv_data; + const AVChannelLayout mono = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; + const AVChannelLayout stereo = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; + + /* allow downmixing to stereo or mono */ +#if FF_API_OLD_CHANNEL_LAYOUT +FF_DISABLE_DEPRECATION_WARNINGS + if (avctx->request_channel_layout) { + av_channel_layout_uninit(&s->downmix_layout); + av_channel_layout_from_mask(&s->downmix_layout, avctx->request_channel_layout); + } +FF_ENABLE_DEPRECATION_WARNINGS +#endif + if (avctx->ch_layout.nb_channels > 1 && + !av_channel_layout_compare(&s->downmix_layout, &mono)) { + av_channel_layout_uninit(&avctx->ch_layout); + avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; + } else if (avctx->ch_layout.nb_channels > 2 && + !av_channel_layout_compare(&s->downmix_layout, &stereo)) { + av_channel_layout_uninit(&avctx->ch_layout); + avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; + } + s->downmixed = 1; +} + /** * AVCodec initialization */ @@ -190,8 +217,6 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx) { static AVOnce init_static_once = AV_ONCE_INIT; AC3DecodeContext *s = avctx->priv_data; - const AVChannelLayout mono = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; - const AVChannelLayout stereo = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; int i, ret; s->avctx = avctx; @@ -219,25 +244,7 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx) else avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; - /* allow downmixing to stereo or mono */ -#if FF_API_OLD_CHANNEL_LAYOUT -FF_DISABLE_DEPRECATION_WARNINGS - if (avctx->request_channel_layout) { - av_channel_layout_uninit(&s->downmix_layout); - av_channel_layout_from_mask(&s->downmix_layout, avctx->request_channel_layout); - } -FF_ENABLE_DEPRECATION_WARNINGS -#endif - if (avctx->ch_layout.nb_channels > 1 && - !av_channel_layout_compare(&s->downmix_layout, &mono)) { - av_channel_layout_uninit(&avctx->ch_layout); - avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; - } else if (avctx->ch_layout.nb_channels > 2 && - !av_channel_layout_compare(&s->downmix_layout, &stereo)) { - av_channel_layout_uninit(&avctx->ch_layout); - avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; - } - s->downmixed = 1; + ac3_downmix(avctx); for (i = 0; i < AC3_MAX_CHANNELS; i++) { s->xcfptr[i] = s->transform_coeffs[i]; @@ -1751,7 +1758,7 @@ skip: if (index < 0) return AVERROR_INVALIDDATA; if (extend >= channel_map_size) - return AVERROR_INVALIDDATA; + break; extended_channel_map[index] = offset + channel_map[extend++]; } else { @@ -1763,7 +1770,7 @@ skip: if (index < 0) return AVERROR_INVALIDDATA; if (extend >= channel_map_size) - return AVERROR_INVALIDDATA; + break; extended_channel_map[index] = offset + channel_map[extend++]; } @@ -1771,6 +1778,8 @@ skip: } } } + + ac3_downmix(avctx); } /* get output buffer */ |