[FFmpeg-devel] [PATCH] Add PlayStation Portable PMP format demuxer
Reimar Döffinger
Reimar.Doeffinger at gmx.de
Fri Apr 1 19:38:27 CEST 2011
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.
It also does not set pts/dts, which FFmpeg cannot handle.
---
Changelog | 1 +
doc/general.texi | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/pmpdec.c | 164 ++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 168 insertions(+), 0 deletions(-)
create mode 100644 libavformat/pmpdec.c
diff --git a/Changelog b/Changelog
index 4833315..f4d68b1 100644
--- a/Changelog
+++ b/Changelog
@@ -88,6 +88,7 @@ version <next>:
- Linux framebuffer input device added
- Chronomaster DFA decoder
- DPX image encoder
+- Playstation Portable PMP format demuxer
version 0.6:
diff --git a/doc/general.texi b/doc/general.texi
index 696db58..9c84008 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -162,6 +162,7 @@ library:
@item NUT @tab X @tab X
@tab NUT Open Container Format
@item Ogg @tab X @tab X
+ at 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 719783c..ce9e5eb 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -214,6 +214,7 @@ 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 3acaed9..73c3687 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -173,6 +173,7 @@ 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 0000000..ca92a42
--- /dev/null
+++ b/libavformat/pmpdec.c
@@ -0,0 +1,164 @@
+/*
+ * PMP demuxer.
+ * Copyright (c) 2011 Reimar Döffinger
+ *
+ * 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"
+
+typedef struct {
+ 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 (AV_RN32(p->buf) == AV_RN32("pmpm") &&
+ AV_RL32(p->buf + 4) == 1)
+ 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 = av_new_stream(s, 0);
+ 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);
+ switch (avio_rl32(pb)) {
+ case 0:
+ audio_codec_id = CODEC_ID_MP3;
+ break;
+ case 1:
+ av_log(s, AV_LOG_ERROR, "AAC 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 = av_new_stream(s, i);
+ 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 (url_feof(pb))
+ return AVERROR(EIO);
+ 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));
+ 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;
+ pkt->stream_index = pmp->cur_stream;
+ }
+ if (pmp->current_packet % pmp->audio_packets == 0)
+ pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
+ pmp->current_packet++;
+ return ret;
+}
+
+static int pmp_seek(AVFormatContext *s, int stream_index,
+ 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,
+};
--
1.7.4.1
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