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#include "libavutil/channel_layout.h" |
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "oggdec.h" |
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struct speex_params { |
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int packet_size; |
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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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int ret; |
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if (!spxp) { |
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spxp = av_mallocz(sizeof(*spxp)); |
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if (!spxp) |
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return AVERROR(ENOMEM); |
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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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int channels; |
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codecpar->codec_id = AV_CODEC_ID_SPEEX; |
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if (os->psize < 68) { |
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av_log(s, AV_LOG_ERROR, "speex packet too small\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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st->codecpar->sample_rate = AV_RL32(p + 36); |
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if (st->codecpar->sample_rate <= 0) { |
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av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate); |
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return AVERROR_INVALIDDATA; |
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} |
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channels = AV_RL32(p + 48); |
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if (channels < 1 || channels > 2) { |
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av_log(s, AV_LOG_ERROR, "invalid channel count. Speex must be mono or stereo.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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av_channel_layout_default(&st->codecpar->ch_layout, channels); |
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spxp->packet_size = AV_RL32(p + 56); |
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frames_per_packet = AV_RL32(p + 64); |
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if (spxp->packet_size < 0 || |
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frames_per_packet < 0 || |
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spxp->packet_size * (int64_t)frames_per_packet > INT32_MAX / 256) { |
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av_log(s, AV_LOG_ERROR, "invalid packet_size, frames_per_packet %d %d\n", spxp->packet_size, frames_per_packet); |
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spxp->packet_size = 0; |
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return AVERROR_INVALIDDATA; |
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} |
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if (frames_per_packet) |
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spxp->packet_size *= frames_per_packet; |
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if ((ret = ff_alloc_extradata(st->codecpar, os->psize)) < 0) |
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return ret; |
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memcpy(st->codecpar->extradata, p, st->codecpar->extradata_size); |
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
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} else |
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ff_vorbis_stream_comment(s, st, 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 = spxp->packet_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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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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os->lastpts = os->lastdts = os->granule - packet_size * |
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ogg_page_packets(os); |
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if (os->flags & OGG_FLAG_EOS && os->segp == os->nsegs && |
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spxp->final_packet_duration) |
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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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.nb_header = 2, |
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}; |
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