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[FFmpeg-devel,4/5] avformat: add derf demuxer

Message ID 20200315103748.2849-4-onemda@gmail.com
State Superseded
Headers show
Series [FFmpeg-devel,1/5] avcodec: add ADPCM IMA MTF decoder
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Commit Message

Paul B Mahol March 15, 2020, 10:37 a.m. UTC
Signed-off-by: Paul B Mahol <onemda@gmail.com>
---
 libavformat/Makefile     |  1 +
 libavformat/allformats.c |  1 +
 libavformat/derf.c       | 79 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100644 libavformat/derf.c

Comments

Andreas Rheinhardt March 15, 2020, 10:48 a.m. UTC | #1
Paul B Mahol:
> Signed-off-by: Paul B Mahol <onemda@gmail.com>
> ---
>  libavformat/Makefile     |  1 +
>  libavformat/allformats.c |  1 +
>  libavformat/derf.c       | 79 ++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 81 insertions(+)
>  create mode 100644 libavformat/derf.c
> 
> diff --git a/libavformat/Makefile b/libavformat/Makefile
> index cd3e9163f5..27615cd746 100644
> --- a/libavformat/Makefile
> +++ b/libavformat/Makefile
> @@ -151,6 +151,7 @@ OBJS-$(CONFIG_DASH_DEMUXER)              += dash.o dashdec.o
>  OBJS-$(CONFIG_DAUD_DEMUXER)              += dauddec.o
>  OBJS-$(CONFIG_DAUD_MUXER)                += daudenc.o
>  OBJS-$(CONFIG_DCSTR_DEMUXER)             += dcstr.o
> +OBJS-$(CONFIG_DERF_DEMUXER)              += derf.o
>  OBJS-$(CONFIG_DFA_DEMUXER)               += dfa.o
>  OBJS-$(CONFIG_DHAV_DEMUXER)              += dhav.o
>  OBJS-$(CONFIG_DIRAC_DEMUXER)             += diracdec.o rawdec.o
> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> index d275c1017b..af10def88b 100644
> --- a/libavformat/allformats.c
> +++ b/libavformat/allformats.c
> @@ -113,6 +113,7 @@ extern AVOutputFormat ff_data_muxer;
>  extern AVInputFormat  ff_daud_demuxer;
>  extern AVOutputFormat ff_daud_muxer;
>  extern AVInputFormat  ff_dcstr_demuxer;
> +extern AVInputFormat  ff_derf_demuxer;
>  extern AVInputFormat  ff_dfa_demuxer;
>  extern AVInputFormat  ff_dhav_demuxer;
>  extern AVInputFormat  ff_dirac_demuxer;
> diff --git a/libavformat/derf.c b/libavformat/derf.c
> new file mode 100644
> index 0000000000..58bbf5b791
> --- /dev/null
> +++ b/libavformat/derf.c
> @@ -0,0 +1,79 @@
> +/*
> + * DERF demuxer
> + * Copyright (c) 2020 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/intreadwrite.h"
> +#include "avformat.h"
> +#include "internal.h"
> +#include "pcm.h"
> +
> +static int derf_probe(const AVProbeData *p)
> +{
> +    if (AV_RL32(p->buf) != MKTAG('D','E','R','F'))
> +        return 0;
> +    if (AV_RL32(p->buf+4) != 1 && AV_RL32(p->buf+4) != 2)
> +        return 0;
> +
> +    return AVPROBE_SCORE_MAX / 3 * 2;
> +}
> +
> +static int derf_read_header(AVFormatContext *s)
> +{
> +    unsigned data_size;
> +    AVIOContext *pb = s->pb;
> +    AVCodecParameters *par;
> +    AVStream *st;
> +
> +    avio_skip(pb, 4);
> +
> +    st = avformat_new_stream(s, NULL);
> +    if (!st)
> +        return AVERROR(ENOMEM);
> +
> +    par              = st->codecpar;
> +    par->codec_type  = AVMEDIA_TYPE_AUDIO;
> +    par->codec_id    = AV_CODEC_ID_DERF_DPCM;
> +    par->format      = AV_SAMPLE_FMT_S16;
> +    par->channels    = avio_rl32(pb);
> +    if (par->channels != 1 && par->channels != 2)
> +        return AVERROR_INVALIDDATA;
> +    if (par->channels == 1)
> +        par->channel_layout = AV_CH_LAYOUT_MONO;
> +    else if (par->channels == 2)
> +        par->channel_layout = AV_CH_LAYOUT_STEREO;
> +    data_size = avio_rl32(pb);
> +    st->duration = data_size / par->channels;

Won't the reported duration be wrong if the file is trimmed? (Is this
how it is supposed to be?)

> +    par->sample_rate = 22050;
> +    par->block_align = 1;
> +
> +    avpriv_set_pts_info(st, 64, 1, par->sample_rate);
> +
> +    return 0;
> +}
> +
> +AVInputFormat ff_derf_demuxer = {
> +    .name           = "derf",
> +    .long_name      = NULL_IF_CONFIG_SMALL("Xilam DERF"),
> +    .read_probe     = derf_probe,
> +    .read_header    = derf_read_header,
> +    .read_packet    = ff_pcm_read_packet,
> +    .read_seek      = ff_pcm_read_seek,
> +    .extensions     = "adp",
> +};
>
Paul B Mahol March 15, 2020, 10:51 a.m. UTC | #2
On 3/15/20, Andreas Rheinhardt <andreas.rheinhardt@gmail.com> wrote:
> Paul B Mahol:
>> Signed-off-by: Paul B Mahol <onemda@gmail.com>
>> ---
>>  libavformat/Makefile     |  1 +
>>  libavformat/allformats.c |  1 +
>>  libavformat/derf.c       | 79 ++++++++++++++++++++++++++++++++++++++++
>>  3 files changed, 81 insertions(+)
>>  create mode 100644 libavformat/derf.c
>>
>> diff --git a/libavformat/Makefile b/libavformat/Makefile
>> index cd3e9163f5..27615cd746 100644
>> --- a/libavformat/Makefile
>> +++ b/libavformat/Makefile
>> @@ -151,6 +151,7 @@ OBJS-$(CONFIG_DASH_DEMUXER)              += dash.o
>> dashdec.o
>>  OBJS-$(CONFIG_DAUD_DEMUXER)              += dauddec.o
>>  OBJS-$(CONFIG_DAUD_MUXER)                += daudenc.o
>>  OBJS-$(CONFIG_DCSTR_DEMUXER)             += dcstr.o
>> +OBJS-$(CONFIG_DERF_DEMUXER)              += derf.o
>>  OBJS-$(CONFIG_DFA_DEMUXER)               += dfa.o
>>  OBJS-$(CONFIG_DHAV_DEMUXER)              += dhav.o
>>  OBJS-$(CONFIG_DIRAC_DEMUXER)             += diracdec.o rawdec.o
>> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
>> index d275c1017b..af10def88b 100644
>> --- a/libavformat/allformats.c
>> +++ b/libavformat/allformats.c
>> @@ -113,6 +113,7 @@ extern AVOutputFormat ff_data_muxer;
>>  extern AVInputFormat  ff_daud_demuxer;
>>  extern AVOutputFormat ff_daud_muxer;
>>  extern AVInputFormat  ff_dcstr_demuxer;
>> +extern AVInputFormat  ff_derf_demuxer;
>>  extern AVInputFormat  ff_dfa_demuxer;
>>  extern AVInputFormat  ff_dhav_demuxer;
>>  extern AVInputFormat  ff_dirac_demuxer;
>> diff --git a/libavformat/derf.c b/libavformat/derf.c
>> new file mode 100644
>> index 0000000000..58bbf5b791
>> --- /dev/null
>> +++ b/libavformat/derf.c
>> @@ -0,0 +1,79 @@
>> +/*
>> + * DERF demuxer
>> + * Copyright (c) 2020 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/intreadwrite.h"
>> +#include "avformat.h"
>> +#include "internal.h"
>> +#include "pcm.h"
>> +
>> +static int derf_probe(const AVProbeData *p)
>> +{
>> +    if (AV_RL32(p->buf) != MKTAG('D','E','R','F'))
>> +        return 0;
>> +    if (AV_RL32(p->buf+4) != 1 && AV_RL32(p->buf+4) != 2)
>> +        return 0;
>> +
>> +    return AVPROBE_SCORE_MAX / 3 * 2;
>> +}
>> +
>> +static int derf_read_header(AVFormatContext *s)
>> +{
>> +    unsigned data_size;
>> +    AVIOContext *pb = s->pb;
>> +    AVCodecParameters *par;
>> +    AVStream *st;
>> +
>> +    avio_skip(pb, 4);
>> +
>> +    st = avformat_new_stream(s, NULL);
>> +    if (!st)
>> +        return AVERROR(ENOMEM);
>> +
>> +    par              = st->codecpar;
>> +    par->codec_type  = AVMEDIA_TYPE_AUDIO;
>> +    par->codec_id    = AV_CODEC_ID_DERF_DPCM;
>> +    par->format      = AV_SAMPLE_FMT_S16;
>> +    par->channels    = avio_rl32(pb);
>> +    if (par->channels != 1 && par->channels != 2)
>> +        return AVERROR_INVALIDDATA;
>> +    if (par->channels == 1)
>> +        par->channel_layout = AV_CH_LAYOUT_MONO;
>> +    else if (par->channels == 2)
>> +        par->channel_layout = AV_CH_LAYOUT_STEREO;
>> +    data_size = avio_rl32(pb);
>> +    st->duration = data_size / par->channels;
>
> Won't the reported duration be wrong if the file is trimmed? (Is this
> how it is supposed to be?)

Yes.

>
>> +    par->sample_rate = 22050;
>> +    par->block_align = 1;
>> +
>> +    avpriv_set_pts_info(st, 64, 1, par->sample_rate);
>> +
>> +    return 0;
>> +}
>> +
>> +AVInputFormat ff_derf_demuxer = {
>> +    .name           = "derf",
>> +    .long_name      = NULL_IF_CONFIG_SMALL("Xilam DERF"),
>> +    .read_probe     = derf_probe,
>> +    .read_header    = derf_read_header,
>> +    .read_packet    = ff_pcm_read_packet,
>> +    .read_seek      = ff_pcm_read_seek,
>> +    .extensions     = "adp",
>> +};
>>
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
diff mbox series

Patch

diff --git a/libavformat/Makefile b/libavformat/Makefile
index cd3e9163f5..27615cd746 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -151,6 +151,7 @@  OBJS-$(CONFIG_DASH_DEMUXER)              += dash.o dashdec.o
 OBJS-$(CONFIG_DAUD_DEMUXER)              += dauddec.o
 OBJS-$(CONFIG_DAUD_MUXER)                += daudenc.o
 OBJS-$(CONFIG_DCSTR_DEMUXER)             += dcstr.o
+OBJS-$(CONFIG_DERF_DEMUXER)              += derf.o
 OBJS-$(CONFIG_DFA_DEMUXER)               += dfa.o
 OBJS-$(CONFIG_DHAV_DEMUXER)              += dhav.o
 OBJS-$(CONFIG_DIRAC_DEMUXER)             += diracdec.o rawdec.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index d275c1017b..af10def88b 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -113,6 +113,7 @@  extern AVOutputFormat ff_data_muxer;
 extern AVInputFormat  ff_daud_demuxer;
 extern AVOutputFormat ff_daud_muxer;
 extern AVInputFormat  ff_dcstr_demuxer;
+extern AVInputFormat  ff_derf_demuxer;
 extern AVInputFormat  ff_dfa_demuxer;
 extern AVInputFormat  ff_dhav_demuxer;
 extern AVInputFormat  ff_dirac_demuxer;
diff --git a/libavformat/derf.c b/libavformat/derf.c
new file mode 100644
index 0000000000..58bbf5b791
--- /dev/null
+++ b/libavformat/derf.c
@@ -0,0 +1,79 @@ 
+/*
+ * DERF demuxer
+ * Copyright (c) 2020 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/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+#include "pcm.h"
+
+static int derf_probe(const AVProbeData *p)
+{
+    if (AV_RL32(p->buf) != MKTAG('D','E','R','F'))
+        return 0;
+    if (AV_RL32(p->buf+4) != 1 && AV_RL32(p->buf+4) != 2)
+        return 0;
+
+    return AVPROBE_SCORE_MAX / 3 * 2;
+}
+
+static int derf_read_header(AVFormatContext *s)
+{
+    unsigned data_size;
+    AVIOContext *pb = s->pb;
+    AVCodecParameters *par;
+    AVStream *st;
+
+    avio_skip(pb, 4);
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    par              = st->codecpar;
+    par->codec_type  = AVMEDIA_TYPE_AUDIO;
+    par->codec_id    = AV_CODEC_ID_DERF_DPCM;
+    par->format      = AV_SAMPLE_FMT_S16;
+    par->channels    = avio_rl32(pb);
+    if (par->channels != 1 && par->channels != 2)
+        return AVERROR_INVALIDDATA;
+    if (par->channels == 1)
+        par->channel_layout = AV_CH_LAYOUT_MONO;
+    else if (par->channels == 2)
+        par->channel_layout = AV_CH_LAYOUT_STEREO;
+    data_size = avio_rl32(pb);
+    st->duration = data_size / par->channels;
+    par->sample_rate = 22050;
+    par->block_align = 1;
+
+    avpriv_set_pts_info(st, 64, 1, par->sample_rate);
+
+    return 0;
+}
+
+AVInputFormat ff_derf_demuxer = {
+    .name           = "derf",
+    .long_name      = NULL_IF_CONFIG_SMALL("Xilam DERF"),
+    .read_probe     = derf_probe,
+    .read_header    = derf_read_header,
+    .read_packet    = ff_pcm_read_packet,
+    .read_seek      = ff_pcm_read_seek,
+    .extensions     = "adp",
+};