[FFmpeg-devel] [PATCH] PVF demuxer
Paul B Mahol
onemda at gmail.com
Fri Nov 30 21:29:31 CET 2012
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/general.texi | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/pvfdec.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 90 insertions(+)
create mode 100644 libavformat/pvfdec.c
diff --git a/doc/general.texi b/doc/general.texi
index 9a5dfcd..5698106 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -286,6 +286,7 @@ library:
@tab NUT Open Container Format
@item Ogg @tab X @tab X
@item Playstation Portable PMP @tab @tab X
+ at item Portable Voice Format @tab @tab X
@item TechnoTrend PVA @tab @tab X
@tab Used by TechnoTrend DVB PCI boards.
@item QCP @tab @tab X
diff --git a/libavformat/Makefile b/libavformat/Makefile
index bc4e076..19378b3 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -268,6 +268,7 @@ OBJS-$(CONFIG_PCM_U8_DEMUXER) += pcmdec.o pcm.o
OBJS-$(CONFIG_PCM_U8_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PMP_DEMUXER) += pmpdec.o
OBJS-$(CONFIG_PVA_DEMUXER) += pva.o
+OBJS-$(CONFIG_PVF_DEMUXER) += pvfdec.o pcm.o
OBJS-$(CONFIG_QCP_DEMUXER) += qcp.o
OBJS-$(CONFIG_R3D_DEMUXER) += r3d.o
OBJS-$(CONFIG_RAWVIDEO_DEMUXER) += rawvideodec.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 2c32cc2..2987b8a 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -204,6 +204,7 @@ void av_register_all(void)
REGISTER_DEMUXER (PMP, pmp);
REGISTER_MUXER (PSP, psp);
REGISTER_DEMUXER (PVA, pva);
+ REGISTER_DEMUXER (PVF, pvf);
REGISTER_DEMUXER (QCP, qcp);
REGISTER_DEMUXER (R3D, r3d);
REGISTER_MUXDEMUX (RAWVIDEO, rawvideo);
diff --git a/libavformat/pvfdec.c b/libavformat/pvfdec.c
new file mode 100644
index 0000000..e8f1424
--- /dev/null
+++ b/libavformat/pvfdec.c
@@ -0,0 +1,87 @@
+/*
+ * PVF demuxer
+ * Copyright (c) 2012 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 pvf_probe(AVProbeData *p)
+{
+ if (!memcmp(p->buf, "PVF1\n", 5))
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+static int pvf_read_header(AVFormatContext *s)
+{
+ char buffer[32];
+ AVStream *st;
+ int bps, channels, sample_rate;
+
+ avio_skip(s->pb, 5);
+ ff_get_line(s->pb, (char *)&buffer, 32);
+ if (sscanf(buffer, "%d %d %d",
+ &channels,
+ &sample_rate,
+ &bps) != 3)
+ return AVERROR_INVALIDDATA;
+
+ if (channels <= 0 || bps <= 0 || sample_rate <= 0)
+ return AVERROR_INVALIDDATA;
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->channels = channels;
+ st->codec->sample_rate = sample_rate;
+ st->codec->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF);
+ st->codec->bits_per_coded_sample = bps;
+ st->codec->block_align = bps * st->codec->channels / 8;
+
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+ return 0;
+}
+
+static int pvf_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ int ret;
+
+ ret= av_get_packet(s->pb, pkt, 1024 * s->streams[0]->codec->block_align);
+ pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
+ pkt->stream_index = 0;
+
+ return ret;
+}
+
+AVInputFormat ff_pvf_demuxer = {
+ .name = "pvf",
+ .long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"),
+ .read_probe = pvf_probe,
+ .read_header = pvf_read_header,
+ .read_packet = pvf_read_packet,
+ .read_seek = ff_pcm_read_seek,
+ .extensions = "pvf",
+ .flags = AVFMT_GENERIC_INDEX,
+};
--
1.7.11.4
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