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![Derek Buitenhuis](/assets/img/avatar_default.png)
* commit '9200514ad8717c63f82101dc394f4378854325bf': lavf: replace AVStream.codec with AVStream.codecpar This has been a HUGE effort from: - Derek Buitenhuis <derek.buitenhuis@gmail.com> - Hendrik Leppkes <h.leppkes@gmail.com> - wm4 <nfxjfg@googlemail.com> - Clément Bœsch <clement@stupeflix.com> - James Almer <jamrial@gmail.com> - Michael Niedermayer <michael@niedermayer.cc> - Rostislav Pehlivanov <atomnuker@gmail.com> Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
217 lines
6.7 KiB
C
217 lines
6.7 KiB
C
/*
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* THP Demuxer
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* Copyright (c) 2007 Marco Gerards
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/intfloat.h"
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#include "avformat.h"
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#include "internal.h"
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typedef struct ThpDemuxContext {
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int version;
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unsigned first_frame;
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unsigned first_framesz;
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unsigned last_frame;
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int compoff;
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unsigned framecnt;
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AVRational fps;
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unsigned frame;
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int64_t next_frame;
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unsigned next_framesz;
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int video_stream_index;
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int audio_stream_index;
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int compcount;
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unsigned char components[16];
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AVStream* vst;
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int has_audio;
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unsigned audiosize;
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} ThpDemuxContext;
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static int thp_probe(AVProbeData *p)
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{
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double d;
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/* check file header */
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if (AV_RL32(p->buf) != MKTAG('T', 'H', 'P', '\0'))
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return 0;
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d = av_int2float(AV_RB32(p->buf + 16));
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if (d < 0.1 || d > 1000 || isnan(d))
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return AVPROBE_SCORE_MAX/4;
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return AVPROBE_SCORE_MAX;
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}
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static int thp_read_header(AVFormatContext *s)
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{
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ThpDemuxContext *thp = s->priv_data;
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AVStream *st;
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AVIOContext *pb = s->pb;
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int64_t fsize= avio_size(pb);
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int i;
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/* Read the file header. */
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avio_rb32(pb); /* Skip Magic. */
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thp->version = avio_rb32(pb);
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avio_rb32(pb); /* Max buf size. */
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avio_rb32(pb); /* Max samples. */
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thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
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thp->framecnt = avio_rb32(pb);
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thp->first_framesz = avio_rb32(pb);
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pb->maxsize = avio_rb32(pb);
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if(fsize>0 && (!pb->maxsize || fsize < pb->maxsize))
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pb->maxsize= fsize;
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thp->compoff = avio_rb32(pb);
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avio_rb32(pb); /* offsetDataOffset. */
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thp->first_frame = avio_rb32(pb);
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thp->last_frame = avio_rb32(pb);
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thp->next_framesz = thp->first_framesz;
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thp->next_frame = thp->first_frame;
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/* Read the component structure. */
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avio_seek (pb, thp->compoff, SEEK_SET);
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thp->compcount = avio_rb32(pb);
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/* Read the list of component types. */
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avio_read(pb, thp->components, 16);
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for (i = 0; i < thp->compcount; i++) {
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if (thp->components[i] == 0) {
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if (thp->vst)
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break;
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/* Video component. */
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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/* The denominator and numerator are switched because 1/fps
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is required. */
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avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_THP;
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st->codecpar->codec_tag = 0; /* no fourcc */
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st->codecpar->width = avio_rb32(pb);
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st->codecpar->height = avio_rb32(pb);
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st->codecpar->sample_rate = av_q2d(thp->fps);
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st->nb_frames =
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st->duration = thp->framecnt;
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thp->vst = st;
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thp->video_stream_index = st->index;
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if (thp->version == 0x11000)
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avio_rb32(pb); /* Unknown. */
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} else if (thp->components[i] == 1) {
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if (thp->has_audio != 0)
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break;
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/* Audio component. */
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP;
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st->codecpar->codec_tag = 0; /* no fourcc */
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st->codecpar->channels = avio_rb32(pb); /* numChannels. */
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st->codecpar->sample_rate = avio_rb32(pb); /* Frequency. */
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st->duration = avio_rb32(pb);
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
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thp->audio_stream_index = st->index;
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thp->has_audio = 1;
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}
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}
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return 0;
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}
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static int thp_read_packet(AVFormatContext *s,
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AVPacket *pkt)
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{
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ThpDemuxContext *thp = s->priv_data;
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AVIOContext *pb = s->pb;
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unsigned int size;
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int ret;
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if (thp->audiosize == 0) {
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/* Terminate when last frame is reached. */
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if (thp->frame >= thp->framecnt)
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return AVERROR_EOF;
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avio_seek(pb, thp->next_frame, SEEK_SET);
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/* Locate the next frame and read out its size. */
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thp->next_frame += FFMAX(thp->next_framesz, 1);
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thp->next_framesz = avio_rb32(pb);
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avio_rb32(pb); /* Previous total size. */
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size = avio_rb32(pb); /* Total size of this frame. */
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/* Store the audiosize so the next time this function is called,
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the audio can be read. */
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if (thp->has_audio)
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thp->audiosize = avio_rb32(pb); /* Audio size. */
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else
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thp->frame++;
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ret = av_get_packet(pb, pkt, size);
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if (ret < 0)
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return ret;
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if (ret != size) {
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av_packet_unref(pkt);
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return AVERROR(EIO);
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}
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pkt->stream_index = thp->video_stream_index;
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} else {
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ret = av_get_packet(pb, pkt, thp->audiosize);
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if (ret < 0)
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return ret;
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if (ret != thp->audiosize) {
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av_packet_unref(pkt);
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return AVERROR(EIO);
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}
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pkt->stream_index = thp->audio_stream_index;
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if (thp->audiosize >= 8)
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pkt->duration = AV_RB32(&pkt->data[4]);
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thp->audiosize = 0;
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thp->frame++;
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}
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return 0;
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}
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AVInputFormat ff_thp_demuxer = {
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.name = "thp",
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.long_name = NULL_IF_CONFIG_SMALL("THP"),
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.priv_data_size = sizeof(ThpDemuxContext),
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.read_probe = thp_probe,
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.read_header = thp_read_header,
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.read_packet = thp_read_packet
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};
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