support for the THP game format by Marco Gerards, mgerards xs4all nl

Originally committed as revision 8587 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -75,6 +75,7 @@ version <next>
 - DCA decoder
 - DXA demuxer and decoder
 - DNxHD decoder
+- Gamecube movie (.THP) playback system
 
 version 0.4.9-pre1:
 

doc/ffmpeg-doc.texi

@@ -901,6 +901,8 @@ library:
 @item DXA @tab    @tab X
 @tab This format is used in non-Windows version of Feeble Files game and
 different game cutscenes repacked for use with ScummVM.
+@item THP @tab    @tab X
+@tab Used on the Nintendo GameCube (video only)
 @end multitable
 
 @code{X} means that encoding (resp. decoding) is supported.

libavcodec/allcodecs.c

@@ -130,6 +130,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(SVQ3, svq3);
     REGISTER_ENCDEC (TARGA, targa);
     REGISTER_DECODER(THEORA, theora);
+    REGISTER_DECODER(THP, thp);
     REGISTER_DECODER(TIERTEXSEQVIDEO, tiertexseqvideo);
     REGISTER_DECODER(TIFF, tiff);
     REGISTER_DECODER(TRUEMOTION1, truemotion1);

libavcodec/avcodec.h

@@ -158,6 +158,7 @@ enum CodecID {
     CODEC_ID_FFH264,
     CODEC_ID_DXA,
     CODEC_ID_DNXHD,
+    CODEC_ID_THP,
 
     /* various pcm "codecs" */
     CODEC_ID_PCM_S16LE= 0x10000,
@@ -2329,6 +2330,7 @@ extern AVCodec svq1_decoder;
 extern AVCodec svq3_decoder;
 extern AVCodec targa_decoder;
 extern AVCodec theora_decoder;
+extern AVCodec thp_decoder;
 extern AVCodec tiertexseqvideo_decoder;
 extern AVCodec tiff_decoder;
 extern AVCodec truemotion1_decoder;

libavcodec/mjpeg.c

@@ -2044,6 +2044,8 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
                         uint8_t x = *(src++);
 
                         *(dst++) = x;
+                        if (avctx->codec_id != CODEC_ID_THP)
+                        {
                         if (x == 0xff)
                         {
                             while(src<buf_end && x == 0xff)
@@ -2055,6 +2057,7 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
                                 break;
                         }
                         }
+                    }
                     init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
 
                     av_log(avctx, AV_LOG_DEBUG, "escaping removed %d bytes\n",
@@ -2583,6 +2586,19 @@ AVCodec mjpeg_decoder = {
     NULL
 };
 
+AVCodec thp_decoder = {
+    "thp",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_THP,
+    sizeof(MJpegDecodeContext),
+    mjpeg_decode_init,
+    NULL,
+    mjpeg_decode_end,
+    mjpeg_decode_frame,
+    CODEC_CAP_DR1,
+    NULL
+};
+
 AVCodec mjpegb_decoder = {
     "mjpegb",
     CODEC_TYPE_VIDEO,

libavformat/Makefile

@@ -120,6 +120,7 @@ OBJS-$(CONFIG_SMACKER_DEMUXER)           += smacker.o
 OBJS-$(CONFIG_SOL_DEMUXER)               += sol.o
 OBJS-$(CONFIG_SWF_DEMUXER)               += swf.o
 OBJS-$(CONFIG_SWF_MUXER)                 += swf.o
+OBJS-$(CONFIG_THP_DEMUXER)               += thp.o
 OBJS-$(CONFIG_TIERTEXSEQ_DEMUXER)        += tiertexseq.o
 OBJS-$(CONFIG_TTA_DEMUXER)               += tta.o
 OBJS-$(CONFIG_V4L2_DEMUXER)              += v4l2.o

libavformat/allformats.c

@@ -142,6 +142,7 @@ void av_register_all(void)
     REGISTER_MUXDEMUX(SWF, swf);
     REGISTER_MUXER   (TG2, tg2);
     REGISTER_MUXER   (TGP, tgp);
+    REGISTER_DEMUXER (THP, thp);
     REGISTER_DEMUXER (TIERTEXSEQ, tiertexseq);
     REGISTER_DEMUXER (TTA, tta);
     REGISTER_DEMUXER (V4L2, v4l2);

libavformat/allformats.h

@@ -168,6 +168,7 @@ extern AVOutputFormat yuv4mpegpipe_muxer;
 extern AVInputFormat yuv4mpegpipe_demuxer;
 extern AVInputFormat tiertexseq_demuxer;
 extern AVInputFormat x11_grab_device_demuxer;
+extern AVInputFormat thp_demuxer;
 
 /* raw.c */
 int pcm_read_seek(AVFormatContext *s,

libavformat/thp.c

@@ -0,0 +1,170 @@
+/*
+ * THP Demuxer
+ * Copyright (c) 2007 Marco Gerards.
+ *
+ * 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 "avformat.h"
+#include "allformats.h"
+
+typedef struct ThpDemuxContext {
+    int              version;
+    int              first_frame;
+    int              first_framesz;
+    int              last_frame;
+    int              compoff;
+    int              framecnt;
+    AVRational       fps;
+    int              frame;
+    int              next_frame;
+    int              next_framesz;
+    int              video_stream_index;
+    int              compcount;
+    unsigned char    components[16];
+    AVStream*        vst;
+    int              has_audio;
+} ThpDemuxContext;
+
+
+static int thp_probe(AVProbeData *p)
+{
+    /* check file header */
+    if (p->buf_size < 4)
+        return 0;
+
+    if (AV_RL32(p->buf) == MKTAG('T', 'H', 'P', '\0'))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int thp_read_header(AVFormatContext *s,
+                           AVFormatParameters *ap)
+{
+  ThpDemuxContext *thp = s->priv_data;
+  AVStream *st;
+  ByteIOContext *pb = &s->pb;
+  int i;
+
+  /* Read the file header.  */
+
+                         get_be32(pb); /* Skip Magic.  */
+  thp->version         = get_be32(pb);
+
+                         get_be32(pb); /* Max buf size.  */
+                         get_be32(pb); /* Max samples.  */
+
+  thp->fps             = av_d2q(av_int2flt(get_be32(pb)), INT_MAX);
+  thp->framecnt        = get_be32(pb);
+  thp->first_framesz   = get_be32(pb);
+                         get_be32(pb); /* Data size.  */
+
+  thp->compoff         = get_be32(pb);
+                         get_be32(pb); /* offsetDataOffset.  */
+  thp->first_frame     = get_be32(pb);
+  thp->last_frame      = get_be32(pb);
+
+  thp->next_framesz    = thp->first_framesz;
+  thp->next_frame      = thp->first_frame;
+
+  /* Read the component structure.  */
+  url_fseek (pb, thp->compoff, SEEK_SET);
+  thp->compcount       = get_be32(pb);
+
+  /* Read the list of component types.  */
+  get_buffer(pb, thp->components, 16);
+
+  for (i = 0; i < thp->compcount; i++) {
+      if (thp->components[i] == 0) {
+          if (thp->vst != 0)
+             break;
+
+          /* Video component.  */
+          st = av_new_stream(s, 0);
+          if (!st)
+             return AVERROR_NOMEM;
+
+          /* The denominator and numerator are switched because 1/fps
+             is required.  */
+          av_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
+          st->codec->codec_type = CODEC_TYPE_VIDEO;
+          st->codec->codec_id = CODEC_ID_THP;
+          st->codec->codec_tag = 0;  /* no fourcc */
+          st->codec->width = get_be32(pb);
+          st->codec->height = get_be32(pb);
+          st->codec->sample_rate = av_q2d(thp->fps);
+          thp->vst = st;
+          thp->video_stream_index = st->index;
+
+          if (thp->version == 0x11000)
+             get_be32(pb); /* Unknown.  */
+        }
+      else if (thp->components[i] == 1) {
+          /* XXX: Required for audio playback.  */
+          thp->has_audio = 1;
+      }
+    }
+
+  return 0;
+}
+
+static int thp_read_packet(AVFormatContext *s,
+                            AVPacket *pkt)
+{
+    ThpDemuxContext *thp = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    int size;
+    int ret;
+
+    /* Terminate when last frame is reached.  */
+    if (thp->frame >= thp->framecnt)
+       return AVERROR_IO;
+
+    url_fseek(pb, thp->next_frame, SEEK_SET);
+
+    /* Locate the next frame and read out its size.  */
+    thp->next_frame += thp->next_framesz;
+    thp->next_framesz = get_be32(pb);
+
+                        get_be32(pb); /* Previous total size.  */
+    size              = get_be32(pb); /* Total size of this frame.  */
+
+    if (thp->has_audio)
+                        get_be32(pb); /* Audio size.  */
+
+    ret = av_get_packet(pb, pkt, size);
+    if (ret != size) {
+       av_free_packet(pkt);
+       return AVERROR_IO;
+    }
+
+    pkt->stream_index = thp->video_stream_index;
+    thp->frame++;
+
+    return 0;
+}
+
+AVInputFormat thp_demuxer = {
+    "thp",
+    "THP",
+    sizeof(ThpDemuxContext),
+    thp_probe,
+    thp_read_header,
+    thp_read_packet
+};