From f28070a123ffae9d3e58e65ef33a3fb69bfe9c5c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reimar=20D=C3=B6ffinger?= <Reimar.Doeffinger@gmx.de>
Date: Sat, 26 Mar 2011 16:25:10 +0100
Subject: [PATCH] Add PlayStation Portable PMP format demuxer
Not yet complete, for demuxing AAC the AAC header must be generated
manually.
Possibly the decoder could accept the header as extradata to simplify
this.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
---
Changelog | 1 +
doc/general.texi | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/pmpdec.c | 179 +++++++++++++++++++++++++++++++++++++++
5 files changed, 183 insertions(+)
create mode 100644 libavformat/pmpdec.c
diff --git a/Changelog b/Changelog
index e5c4993dbe0..ff37020bdbf 100644
--- a/Changelog
+++ b/Changelog
@@ -103,6 +103,7 @@ easier to use. The changes are:
- VBLE Decoder
- OS X Video Decoder Acceleration (VDA) support
- CRI ADX audio format demuxer
+- Playstation Portable PMP format demuxer
version 0.7:
diff --git a/doc/general.texi b/doc/general.texi
index 9a5c405f85b..dc7e8bb77b7 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -167,6 +167,7 @@ library:
@item NUT @tab X @tab X
@tab NUT Open Container Format
@item Ogg @tab X @tab X
+@item Playstation Portable PMP @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 f3f8679b421..fccb5f342f2 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -218,6 +218,7 @@ OBJS-$(CONFIG_PCM_U32LE_DEMUXER) += pcmdec.o pcm.o rawdec.o
OBJS-$(CONFIG_PCM_U32LE_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PCM_U8_DEMUXER) += pcmdec.o pcm.o rawdec.o
OBJS-$(CONFIG_PCM_U8_MUXER) += pcmenc.o rawenc.o
+OBJS-$(CONFIG_PMP_DEMUXER) += pmpdec.o
OBJS-$(CONFIG_PVA_DEMUXER) += pva.o
OBJS-$(CONFIG_QCP_DEMUXER) += qcp.o
OBJS-$(CONFIG_R3D_DEMUXER) += r3d.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 573b714d33a..fe775f4cce4 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -177,6 +177,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX (PCM_U16BE, pcm_u16be);
REGISTER_MUXDEMUX (PCM_U16LE, pcm_u16le);
REGISTER_MUXDEMUX (PCM_U8, pcm_u8);
+ REGISTER_DEMUXER (PMP, pmp);
REGISTER_MUXER (PSP, psp);
REGISTER_DEMUXER (PVA, pva);
REGISTER_DEMUXER (QCP, qcp);
diff --git a/libavformat/pmpdec.c b/libavformat/pmpdec.c
new file mode 100644
index 00000000000..a367344b161
--- /dev/null
+++ b/libavformat/pmpdec.c
@@ -0,0 +1,179 @@
+/*
+ * PMP demuxer
+ * Copyright (c) 2011 Reimar Döffinger
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; 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"
+
+typedef struct PMPContext {
+ int cur_stream;
+ int num_streams;
+ int audio_packets;
+ int current_packet;
+ uint32_t *packet_sizes;
+ int packet_sizes_alloc;
+} PMPContext;
+
+static int pmp_probe(AVProbeData *p)
+{
+ if (!memcmp(p->buf, "pmpm\1\0\0\0", 8))
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+static int pmp_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+ PMPContext *pmp = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int tb_num, tb_den;
+ int index_cnt;
+ int audio_codec_id = CODEC_ID_NONE;
+ int srate, channels;
+ int i;
+ uint64_t pos;
+ AVStream *vst = avformat_new_stream(s, NULL);
+ if (!vst)
+ return AVERROR(ENOMEM);
+ vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ avio_skip(pb, 8);
+ switch (avio_rl32(pb)) {
+ case 0:
+ vst->codec->codec_id = CODEC_ID_MPEG4;
+ break;
+ case 1:
+ vst->codec->codec_id = CODEC_ID_H264;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "Unsupported video format\n");
+ break;
+ }
+ index_cnt = avio_rl32(pb);
+ vst->codec->width = avio_rl32(pb);
+ vst->codec->height = avio_rl32(pb);
+
+ tb_num = avio_rl32(pb);
+ tb_den = avio_rl32(pb);
+ av_set_pts_info(vst, 32, tb_num, tb_den);
+ vst->nb_frames = index_cnt;
+ vst->duration = index_cnt;
+
+ switch (avio_rl32(pb)) {
+ case 0:
+ audio_codec_id = CODEC_ID_MP3;
+ break;
+ case 1:
+ av_log(s, AV_LOG_WARNING, "AAC is not yet correctly supported\n");
+ audio_codec_id = CODEC_ID_AAC;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "Unsupported audio format\n");
+ break;
+ }
+ pmp->num_streams = avio_rl16(pb) + 1;
+ avio_skip(pb, 10);
+ srate = avio_rl32(pb);
+ channels = avio_rl32(pb) + 1;
+ for (i = 1; i < pmp->num_streams; i++) {
+ AVStream *ast = avformat_new_stream(s, NULL);
+ if (!ast)
+ return AVERROR(ENOMEM);
+ ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ ast->codec->codec_id = audio_codec_id;
+ ast->codec->channels = channels;
+ ast->codec->sample_rate = srate;
+ av_set_pts_info(ast, 32, 1, srate);
+ }
+ pos = avio_tell(pb) + 4 * index_cnt;
+ for (i = 0; i < index_cnt; i++) {
+ int size = avio_rl32(pb);
+ int flags = size & 1 ? AVINDEX_KEYFRAME : 0;
+ size >>= 1;
+ av_add_index_entry(vst, pos, i, size, 0, flags);
+ pos += size;
+ }
+ return 0;
+}
+
+static int pmp_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ PMPContext *pmp = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int ret = 0;
+ int i;
+
+ if (pb->eof_reached)
+ return AVERROR_EOF;
+ if (pmp->cur_stream == 0) {
+ int num_packets;
+ pmp->audio_packets = avio_r8(pb);
+ num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1;
+ avio_skip(pb, 8);
+ pmp->current_packet = 0;
+ av_fast_malloc(&pmp->packet_sizes,
+ &pmp->packet_sizes_alloc,
+ num_packets * sizeof(*pmp->packet_sizes));
+ if (!pmp->packet_sizes_alloc) {
+ av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n");
+ return AVERROR(ENOMEM);
+ }
+ for (i = 0; i < num_packets; i++)
+ pmp->packet_sizes[i] = avio_rl32(pb);
+ }
+ ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]);
+ if (ret > 0) {
+ ret = 0;
+ // FIXME: this is a hack that should be removed once
+ // compute_pkt_fields() can handle timestamps properly
+ if (pmp->cur_stream == 0)
+ pkt->dts = s->streams[0]->cur_dts++;
+ pkt->stream_index = pmp->cur_stream;
+ }
+ pmp->current_packet++;
+ if (pmp->current_packet == 1 || pmp->current_packet > pmp->audio_packets)
+ pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
+
+ return ret;
+}
+
+static int pmp_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
+{
+ PMPContext *pmp = s->priv_data;
+ pmp->cur_stream = 0;
+ // fallback to default seek now
+ return -1;
+}
+
+static int pmp_close(AVFormatContext *s)
+{
+ PMPContext *pmp = s->priv_data;
+ av_freep(&pmp->packet_sizes);
+ return 0;
+}
+
+AVInputFormat ff_pmp_demuxer = {
+ .name = "pmp",
+ .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP format"),
+ .priv_data_size = sizeof(PMPContext),
+ .read_probe = pmp_probe,
+ .read_header = pmp_header,
+ .read_packet = pmp_packet,
+ .read_seek = pmp_seek,
+ .read_close = pmp_close,
+};
--
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