diff options
Diffstat (limited to 'libavformat/oggparseopus.c')
| -rw-r--r-- | libavformat/oggparseopus.c | 100 |
1 files changed, 70 insertions, 30 deletions
diff --git a/libavformat/oggparseopus.c b/libavformat/oggparseopus.c index 5931ab543b..c8b02fab4d 100644 --- a/libavformat/oggparseopus.c +++ b/libavformat/oggparseopus.c @@ -2,20 +2,20 @@ * Opus parser for Ogg * Copyright (c) 2012 Nicolas George * - * 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 */ @@ -32,6 +32,7 @@ struct oggopus_private { int64_t cur_dts; }; +#define OPUS_SEEK_PREROLL_MS 80 #define OPUS_HEAD_SIZE 19 static int opus_header(AVFormatContext *avf, int idx) @@ -41,31 +42,34 @@ static int opus_header(AVFormatContext *avf, int idx) AVStream *st = avf->streams[idx]; struct oggopus_private *priv = os->private; uint8_t *packet = os->buf + os->pstart; - uint8_t *extradata; if (!priv) { priv = os->private = av_mallocz(sizeof(*priv)); if (!priv) return AVERROR(ENOMEM); } + if (os->flags & OGG_FLAG_BOS) { if (os->psize < OPUS_HEAD_SIZE || (AV_RL8(packet + 8) & 0xF0) != 0) return AVERROR_INVALIDDATA; - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = AV_CODEC_ID_OPUS; - st->codec->channels = AV_RL8(packet + 9); + st->codec->channels = AV_RL8 (packet + 9); priv->pre_skip = AV_RL16(packet + 10); + st->codec->delay = priv->pre_skip; + /*orig_sample_rate = AV_RL32(packet + 12);*/ + /*gain = AV_RL16(packet + 16);*/ + /*channel_map = AV_RL8 (packet + 18);*/ - extradata = av_malloc(os->psize + FF_INPUT_BUFFER_PADDING_SIZE); - if (!extradata) + if (ff_alloc_extradata(st->codec, os->psize)) return AVERROR(ENOMEM); - memcpy(extradata, packet, os->psize); - st->codec->extradata = extradata; - st->codec->extradata_size = os->psize; + memcpy(st->codec->extradata, packet, os->psize); st->codec->sample_rate = 48000; + av_codec_set_seek_preroll(st->codec, + av_rescale(OPUS_SEEK_PREROLL_MS, + st->codec->sample_rate, 1000)); avpriv_set_pts_info(st, 64, 1, 48000); priv->need_comments = 1; return 1; @@ -82,6 +86,26 @@ static int opus_header(AVFormatContext *avf, int idx) return 0; } +static int opus_duration(uint8_t *src, int size) +{ + unsigned nb_frames = 1; + unsigned toc = src[0]; + unsigned toc_config = toc >> 3; + unsigned toc_count = toc & 3; + unsigned frame_size = toc_config < 12 ? FFMAX(480, 960 * (toc_config & 3)) : + toc_config < 16 ? 480 << (toc_config & 1) : + 120 << (toc_config & 3); + if (toc_count == 3) { + if (size<2) + return AVERROR_INVALIDDATA; + nb_frames = src[1] & 0x3F; + } else if (toc_count) { + nb_frames = 2; + } + + return frame_size * nb_frames; +} + static int opus_packet(AVFormatContext *avf, int idx) { struct ogg *ogg = avf->priv_data; @@ -89,26 +113,43 @@ static int opus_packet(AVFormatContext *avf, int idx) AVStream *st = avf->streams[idx]; struct oggopus_private *priv = os->private; uint8_t *packet = os->buf + os->pstart; - unsigned toc, toc_config, toc_count, frame_size, nb_frames = 1; + int ret; if (!os->psize) return AVERROR_INVALIDDATA; - toc = *packet; - toc_config = toc >> 3; - toc_count = toc & 3; - frame_size = toc_config < 12 ? FFMAX(480, 960 * (toc_config & 3)) : - toc_config < 16 ? 480 << (toc_config & 1) : - 120 << (toc_config & 3); - if (toc_count == 3) { - if (os->psize < 2) - return AVERROR_INVALIDDATA; - nb_frames = packet[1] & 0x3F; - } else if (toc_count) { - nb_frames = 2; + if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) { + int seg, d; + int duration; + uint8_t *last_pkt = os->buf + os->pstart; + uint8_t *next_pkt = last_pkt; + + duration = 0; + seg = os->segp; + d = opus_duration(last_pkt, os->psize); + if (d < 0) { + os->pflags |= AV_PKT_FLAG_CORRUPT; + return 0; + } + duration += d; + last_pkt = next_pkt = next_pkt + os->psize; + for (; seg < os->nsegs; seg++) { + next_pkt += os->segments[seg]; + if (os->segments[seg] < 255 && next_pkt != last_pkt) { + int d = opus_duration(last_pkt, next_pkt - last_pkt); + if (d > 0) + duration += d; + last_pkt = next_pkt; + } + } + os->lastpts = + os->lastdts = os->granule - duration; } - os->pduration = frame_size * nb_frames; + if ((ret = opus_duration(packet, os->psize)) < 0) + return ret; + + os->pduration = ret; if (os->lastpts != AV_NOPTS_VALUE) { if (st->start_time == AV_NOPTS_VALUE) st->start_time = os->lastpts; @@ -121,10 +162,10 @@ static int opus_packet(AVFormatContext *avf, int idx) skip = FFMIN(skip, os->pduration); if (skip > 0) { os->pduration = skip < os->pduration ? os->pduration - skip : 1; - av_log(avf, AV_LOG_WARNING, - "Last packet is truncated to %d (because of unimplemented end trim support).\n", + os->end_trimming = skip; + av_log(avf, AV_LOG_DEBUG, + "Last packet was truncated to %d due to end trimming.\n", os->pduration); - return AVERROR_PATCHWELCOME; } } @@ -137,6 +178,5 @@ const struct ogg_codec ff_opus_codec = { .magicsize = 8, .header = opus_header, .packet = opus_packet, - .granule_is_start = 1, .nb_header = 1, }; |