diff options
Diffstat (limited to 'libavcodec/mlpdec.c')
| -rw-r--r-- | libavcodec/mlpdec.c | 60 |
1 files changed, 55 insertions, 5 deletions
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c index 9a2496d..9909a71 100644 --- a/libavcodec/mlpdec.c +++ b/libavcodec/mlpdec.c @@ -2,20 +2,20 @@ * MLP decoder * Copyright (c) 2007-2008 Ian Caulfield * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg 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, + * FFmpeg 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 + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -41,7 +41,7 @@ static const char* sample_message = "Please file a bug report following the instructions at " - "http://libav.org/bugreports.html and include " + "http://ffmpeg.org/bugreports.html and include " "a sample of this file."; typedef struct SubStream { @@ -134,6 +134,9 @@ typedef struct MLPDecodeContext { /// Index of the last substream to decode - further substreams are skipped. uint8_t max_decoded_substream; + /// Stream needs channel reordering to comply with FFmpeg's channel order + uint8_t needs_reordering; + /// number of PCM samples contained in each frame int access_unit_size; /// next power of two above the number of samples in each frame @@ -330,6 +333,26 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb) for (substr = 0; substr < MAX_SUBSTREAMS; substr++) m->substream[substr].restart_seen = 0; + if (mh.stream_type == 0xbb) { + /* MLP stream */ + m->avctx->channel_layout = ff_mlp_layout[mh.channels_mlp]; + } else { /* mh.stream_type == 0xba */ + /* TrueHD stream */ + if (mh.channels_thd_stream2) { + m->avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream2); + } else { + m->avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream1); + } + if (m->avctx->channels && + !m->avctx->request_channels && !m->avctx->request_channel_layout && + av_get_channel_layout_nb_channels(m->avctx->channel_layout) != m->avctx->channels) { + m->avctx->channel_layout = 0; + av_log_ask_for_sample(m->avctx, "Unknown channel layout."); + } + } + + m->needs_reordering = mh.channels_mlp >= 18 && mh.channels_mlp <= 20; + return 0; } @@ -440,6 +463,33 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, s->ch_assign[ch_assign] = ch; } + if (m->avctx->codec_id == CODEC_ID_MLP && m->needs_reordering) { + if (m->avctx->channel_layout == (AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY) || + m->avctx->channel_layout == AV_CH_LAYOUT_5POINT0_BACK) { + int i = s->ch_assign[4]; + s->ch_assign[4] = s->ch_assign[3]; + s->ch_assign[3] = s->ch_assign[2]; + s->ch_assign[2] = i; + } else if (m->avctx->channel_layout == AV_CH_LAYOUT_5POINT1_BACK) { + FFSWAP(int, s->ch_assign[2], s->ch_assign[4]); + FFSWAP(int, s->ch_assign[3], s->ch_assign[5]); + } + } + if (m->avctx->codec_id == CODEC_ID_TRUEHD && + (m->avctx->channel_layout == AV_CH_LAYOUT_7POINT1 || + m->avctx->channel_layout == AV_CH_LAYOUT_7POINT1_WIDE)) { + FFSWAP(int, s->ch_assign[4], s->ch_assign[6]); + FFSWAP(int, s->ch_assign[5], s->ch_assign[7]); + } else if (m->avctx->codec_id == CODEC_ID_TRUEHD && + (m->avctx->channel_layout == AV_CH_LAYOUT_6POINT1 || + m->avctx->channel_layout == (AV_CH_LAYOUT_6POINT1 | AV_CH_TOP_CENTER) || + m->avctx->channel_layout == (AV_CH_LAYOUT_6POINT1 | AV_CH_TOP_FRONT_CENTER))) { + int i = s->ch_assign[6]; + s->ch_assign[6] = s->ch_assign[5]; + s->ch_assign[5] = s->ch_assign[4]; + s->ch_assign[4] = i; + } + checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count); if (checksum != get_bits(gbp, 8)) |
