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avformat: add DHAV demuxer

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-02-13 15:13:09 +01:00
parent 0279cb4f69
commit b80003fe28
5 changed files with 300 additions and 1 deletions
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1
Changelog
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@ -8,6 +8,7 @@ version <next>:
- chromashift and rgbashift filters
- freezedetect filter
- truehd_core bitstream filter
- dhav demuxer
version 4.1:

1
libavformat/Makefile
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@ -149,6 +149,7 @@ OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o
OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o
OBJS-$(CONFIG_DFA_DEMUXER) += dfa.o
OBJS-$(CONFIG_DHAV_DEMUXER) += dhav.o
OBJS-$(CONFIG_DIRAC_DEMUXER) += diracdec.o rawdec.o
OBJS-$(CONFIG_DIRAC_MUXER) += rawenc.o
OBJS-$(CONFIG_DNXHD_DEMUXER) += dnxhddec.o rawdec.o

1
libavformat/allformats.c
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@ -110,6 +110,7 @@ extern AVInputFormat ff_daud_demuxer;
extern AVOutputFormat ff_daud_muxer;
extern AVInputFormat ff_dcstr_demuxer;
extern AVInputFormat ff_dfa_demuxer;
extern AVInputFormat ff_dhav_demuxer;
extern AVInputFormat ff_dirac_demuxer;
extern AVOutputFormat ff_dirac_muxer;
extern AVInputFormat ff_dnxhd_demuxer;

296
libavformat/dhav.c Normal file
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@ -0,0 +1,296 @@
/*
* DHAV demuxer
*
* Copyright (c) 2018 Paul B Mahol
*
* This file is part of FFmpeg.
*
* 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.
*
* 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "avio_internal.h"
#include "avformat.h"
#include "internal.h"
typedef struct DHAVContext {
unsigned type;
int width, height;
int video_codec;
int frame_rate;
int channels;
int audio_codec;
int sample_rate;
int64_t pts;
int video_stream_index;
int audio_stream_index;
} DHAVContext;
static int dhav_probe(AVProbeData *p)
{
if (!memcmp(p->buf, "DAHUA", 5))
return AVPROBE_SCORE_MAX;
if (memcmp(p->buf, "DHAV", 4))
return 0;
if (p->buf[4] == 0xf0 ||
p->buf[4] == 0xf1 ||
p->buf[4] == 0xfc ||
p->buf[4] == 0xfd)
return AVPROBE_SCORE_MAX;
return 0;
}
static int dhav_read_header(AVFormatContext *s)
{
DHAVContext *dhav = s->priv_data;
uint8_t signature[5];
ffio_ensure_seekback(s->pb, 5);
avio_read(s->pb, signature, sizeof(signature));
if (!memcmp(signature, "DAHUA", 5))
avio_skip(s->pb, 0x400 - 5);
else
avio_seek(s->pb, -5, SEEK_CUR);
s->ctx_flags |= AVFMTCTX_NOHEADER;
dhav->video_stream_index = -1;
dhav->audio_stream_index = -1;
return 0;
}
static const uint32_t sample_rates[] = {
8000, 4000, 8000, 11025, 16000,
20000, 22050, 32000, 44100, 48000,
96000, 192000, 64000,
};
static int parse_ext(AVFormatContext *s, int length)
{
DHAVContext *dhav = s->priv_data;
int index;
while (length > 0) {
int type = avio_r8(s->pb);
switch (type) {
case 0x80:
avio_skip(s->pb, 1);
dhav->width = 8 * avio_r8(s->pb);
dhav->height = 8 * avio_r8(s->pb);
length -= 4;
break;
case 0x81:
avio_skip(s->pb, 1);
dhav->video_codec = avio_r8(s->pb);
dhav->frame_rate = avio_r8(s->pb);
length -= 4;
break;
case 0x82:
avio_skip(s->pb, 3);
dhav->width = avio_rl16(s->pb);
dhav->height = avio_rl16(s->pb);
length -= 8;
break;
case 0x83:
dhav->channels = avio_r8(s->pb);
dhav->audio_codec = avio_r8(s->pb);
index = avio_r8(s->pb);
if (index < FF_ARRAY_ELEMS(sample_rates)) {
dhav->sample_rate = sample_rates[index];
} else {
dhav->sample_rate = 8000;
}
length -= 4;
break;
case 0x88:
avio_skip(s->pb, 7);
length -= 8;
break;
case 0x8c:
avio_skip(s->pb, 1);
dhav->channels = avio_r8(s->pb);
dhav->audio_codec = avio_r8(s->pb);
index = avio_r8(s->pb);
if (index < FF_ARRAY_ELEMS(sample_rates)) {
dhav->sample_rate = sample_rates[index];
} else {
dhav->sample_rate = 8000;
}
avio_skip(s->pb, 3);
length -= 8;
break;
case 0x91:
case 0x92:
case 0x93:
case 0x95:
case 0x9a:
case 0x9b: // sample aspect ratio
case 0xb3:
avio_skip(s->pb, 7);
length -= 8;
break;
case 0x84:
case 0x85:
case 0x8b:
case 0x94:
case 0x96:
case 0xa0:
case 0xb2:
case 0xb4:
avio_skip(s->pb, 3);
length -= 4;
break;
default:
av_log(s, AV_LOG_INFO, "Unknown type: %X, skipping rest of header.\n", type);
avio_skip(s->pb, length - 1);
length = 0;
}
}
return 0;
}
static int read_chunk(AVFormatContext *s)
{
DHAVContext *dhav = s->priv_data;
unsigned size, skip;
int64_t start, end;
int ret;
start = avio_tell(s->pb);
if (avio_feof(s->pb))
return AVERROR_EOF;
if (avio_rl32(s->pb) != MKTAG('D','H','A','V'))
return AVERROR_INVALIDDATA;
dhav->type = avio_r8(s->pb);
avio_skip(s->pb, 3);
dhav->pts = avio_rl32(s->pb);
size = avio_rl32(s->pb);
if (size < 24)
return AVERROR_INVALIDDATA;
if (dhav->type == 0xf1) {
avio_skip(s->pb, size - 16);
return 0;
}
avio_rl32(s->pb);
avio_skip(s->pb, 2);
skip = avio_r8(s->pb);
avio_skip(s->pb, 1);
ret = parse_ext(s, skip);
if (ret < 0)
return ret;
end = avio_tell(s->pb);
return size - 8 - (end - start);
}
static int dhav_read_packet(AVFormatContext *s, AVPacket *pkt)
{
DHAVContext *dhav = s->priv_data;
int64_t start;
int ret;
start = avio_tell(s->pb);
while ((ret = read_chunk(s)) == 0)
;
if (ret < 0)
return ret;
if (dhav->type == 0xfd && dhav->video_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
switch (dhav->video_codec) {
case 0x1: st->codecpar->codec_id = AV_CODEC_ID_MPEG4; break;
case 0x3: st->codecpar->codec_id = AV_CODEC_ID_MJPEG; break;
case 0x2:
case 0x4:
case 0x8: st->codecpar->codec_id = AV_CODEC_ID_H264; break;
case 0xc: st->codecpar->codec_id = AV_CODEC_ID_HEVC; break;
default: avpriv_request_sample(s, "Unknown video codec %X\n", dhav->video_codec);
}
st->codecpar->width = dhav->width;
st->codecpar->height = dhav->height;
dhav->video_stream_index = st->index;
avpriv_set_pts_info(st, 64, 1, dhav->frame_rate);
} else if (dhav->type == 0xf0 && dhav->audio_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
switch (dhav->audio_codec) {
case 0x07: st->codecpar->codec_id = AV_CODEC_ID_PCM_S8; break;
case 0x0c: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
case 0x10: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
case 0x0a: st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; break;
case 0x16: st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; break;
case 0x0e: st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; break;
case 0x1a: st->codecpar->codec_id = AV_CODEC_ID_AAC; break;
case 0x1f: st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
case 0x21: st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
case 0x0d: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MS; break;
default: avpriv_request_sample(s, "Unknown audio codec %X\n", dhav->audio_codec);
}
st->codecpar->channels = dhav->channels;
st->codecpar->sample_rate = dhav->sample_rate;
dhav->audio_stream_index = st->index;
avpriv_set_pts_info(st, 64, ret, dhav->sample_rate);
}
ret = av_get_packet(s->pb, pkt, ret);
if (ret < 0)
return ret;
pkt->stream_index = dhav->type == 0xf0 ? dhav->audio_stream_index : dhav->video_stream_index;
if (dhav->type != 0xfc)
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->pts = dhav->pts;
pkt->duration = 1;
pkt->pos = start;
if (avio_rl32(s->pb) != MKTAG('d','h','a','v'))
return AVERROR_INVALIDDATA;
avio_skip(s->pb, 4);
return ret;
}
AVInputFormat ff_dhav_demuxer = {
.name = "dhav",
.long_name = NULL_IF_CONFIG_SMALL("Video DAV"),
.priv_data_size = sizeof(DHAVContext),
.read_probe = dhav_probe,
.read_header = dhav_read_header,
.read_packet = dhav_read_packet,
.extensions = "dav",
.flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
};

2
libavformat/version.h
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@ -32,7 +32,7 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 58
#define LIBAVFORMAT_VERSION_MINOR 22
#define LIBAVFORMAT_VERSION_MINOR 23
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \