[FFmpeg-cvslog] Add PlayStation Portable PMP format demuxer

Reimar Döffinger git at videolan.org
Wed Apr 6 19:31:04 CEST 2011


ffmpeg | branch: master | Reimar Döffinger <Reimar.Doeffinger at gmx.de> | Sat Mar 26 16:25:10 2011 +0100| [1265395b5b1a6cde6549dabbb3820d343642f809] | committer: Reimar Döffinger

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.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1265395b5b1a6cde6549dabbb3820d343642f809
---

 Changelog                |    1 +
 doc/general.texi         |    1 +
 libavformat/Makefile     |    1 +
 libavformat/allformats.c |    1 +
 libavformat/pmpdec.c     |  172 ++++++++++++++++++++++++++++++++++++++++++++++
 libavformat/version.h    |    2 +-
 6 files changed, 177 insertions(+), 1 deletions(-)

diff --git a/Changelog b/Changelog
index e60c278..8c641e2 100644
--- a/Changelog
+++ b/Changelog
@@ -89,6 +89,7 @@ version <next>:
 - Chronomaster DFA decoder
 - DPX image encoder
 - MicroDVD subtitle file muxer and demuxer
+- Playstation Portable PMP format demuxer
 
 
 version 0.6:
diff --git a/doc/general.texi b/doc/general.texi
index 3e4dbd2..932e575 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 5a2a5f4..c687d86 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -216,6 +216,7 @@ 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 7a8874f..ba4eac3 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -174,6 +174,7 @@ 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..ba40003
--- /dev/null
+++ b/libavformat/pmpdec.c
@@ -0,0 +1,172 @@
+/*
+ * 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);
+    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_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_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));
+        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 remove once
+        // compute_pkt_fields can handle
+        if (pmp->cur_stream == 0)
+            pkt->dts = s->streams[0]->cur_dts++;
+        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,
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index 84b6c11..4c31bc2 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 105
+#define LIBAVFORMAT_VERSION_MINOR 106
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \



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