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128 lines
4.3 KiB
128 lines
4.3 KiB
/* |
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Copyright (C) 2008 Reimar Döffinger |
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Permission is hereby granted, free of charge, to any person |
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obtaining a copy of this software and associated documentation |
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files (the "Software"), to deal in the Software without |
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restriction, including without limitation the rights to use, copy, |
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modify, merge, publish, distribute, sublicense, and/or sell copies |
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of the Software, and to permit persons to whom the Software is |
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furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be |
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included in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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**/ |
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#include <stdlib.h> |
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#include "libavutil/bswap.h" |
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#include "libavutil/avstring.h" |
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#include "libavcodec/get_bits.h" |
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#include "libavcodec/bytestream.h" |
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#include "avformat.h" |
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#include "oggdec.h" |
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struct speex_params { |
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int final_packet_duration; |
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int seq; |
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}; |
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static int speex_header(AVFormatContext *s, int idx) { |
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struct ogg *ogg = s->priv_data; |
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struct ogg_stream *os = ogg->streams + idx; |
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struct speex_params *spxp = os->private; |
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AVStream *st = s->streams[idx]; |
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uint8_t *p = os->buf + os->pstart; |
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if (!spxp) { |
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spxp = av_mallocz(sizeof(*spxp)); |
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os->private = spxp; |
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} |
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if (spxp->seq > 1) |
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return 0; |
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if (spxp->seq == 0) { |
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int frames_per_packet; |
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st->codec->codec_type = CODEC_TYPE_AUDIO; |
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st->codec->codec_id = CODEC_ID_SPEEX; |
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st->codec->sample_rate = AV_RL32(p + 36); |
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st->codec->channels = AV_RL32(p + 48); |
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/* We treat the whole Speex packet as a single frame everywhere Speex |
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is handled in FFmpeg. This avoids the complexities of splitting |
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and joining individual Speex frames, which are not always |
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byte-aligned. */ |
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st->codec->frame_size = AV_RL32(p + 56); |
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frames_per_packet = AV_RL32(p + 64); |
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if (frames_per_packet) |
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st->codec->frame_size *= frames_per_packet; |
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st->codec->extradata_size = os->psize; |
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st->codec->extradata = av_malloc(st->codec->extradata_size |
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+ FF_INPUT_BUFFER_PADDING_SIZE); |
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memcpy(st->codec->extradata, p, st->codec->extradata_size); |
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st->time_base.num = 1; |
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st->time_base.den = st->codec->sample_rate; |
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} else |
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vorbis_comment(s, p, os->psize); |
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spxp->seq++; |
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return 1; |
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} |
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static int ogg_page_packets(struct ogg_stream *os) |
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{ |
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int i; |
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int packets = 0; |
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for (i = 0; i < os->nsegs; i++) |
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if (os->segments[i] < 255) |
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packets++; |
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return packets; |
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} |
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static int speex_packet(AVFormatContext *s, int idx) |
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{ |
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struct ogg *ogg = s->priv_data; |
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struct ogg_stream *os = ogg->streams + idx; |
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struct speex_params *spxp = os->private; |
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int packet_size = s->streams[idx]->codec->frame_size; |
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if (os->flags & OGG_FLAG_EOS && os->lastpts != AV_NOPTS_VALUE && |
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os->granule > 0) { |
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/* first packet of final page. we have to calculate the final packet |
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duration here because it is the only place we know the next-to-last |
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granule position. */ |
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spxp->final_packet_duration = os->granule - os->lastpts - |
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packet_size * (ogg_page_packets(os) - 1); |
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} |
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if (!os->lastpts && os->granule > 0) |
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/* first packet */ |
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os->pduration = os->granule - packet_size * (ogg_page_packets(os) - 1); |
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else if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs && |
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spxp->final_packet_duration) |
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/* final packet */ |
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os->pduration = spxp->final_packet_duration; |
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else |
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os->pduration = packet_size; |
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return 0; |
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} |
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const struct ogg_codec ff_speex_codec = { |
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.magic = "Speex ", |
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.magicsize = 8, |
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.header = speex_header, |
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.packet = speex_packet |
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};
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