[SCM] libav/experimental: complete American Laser Games MM playback system, courtesy of Peter Ross (suxen_drol at hotmail dot com)
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:46:29 UTC 2013
The following commit has been merged in the experimental branch:
commit 4e114829b1d03ce4714c45f5d8628d46cc873cc0
Author: Mike Melanson <mike at multimedia.cx>
Date: Sun Feb 12 06:49:40 2006 +0000
complete American Laser Games MM playback system, courtesy of Peter Ross
(suxen_drol at hotmail dot com)
Originally committed as revision 4999 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/CREDITS b/CREDITS
index d7cadf1..83833ad 100644
--- a/CREDITS
+++ b/CREDITS
@@ -30,6 +30,7 @@ Loren Merritt
Jeff Muizelaar
Michael Niedermayer
François Revol
+Peter Ross
Måns Rullgård
Roman Shaposhnik
Dieter Shirley
diff --git a/Changelog b/Changelog
index ca0f716..c0ae149 100644
--- a/Changelog
+++ b/Changelog
@@ -36,6 +36,7 @@ version <next>
- AIFF/AIFF-C audio format, encoding and decoding
- ADTS AAC file reading and writing
- Creative VOC file reading and writing
+- American Laser Games multimedia (*.mm) playback system
version 0.4.9-pre1:
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi
index 5a451c1..617a6ea 100644
--- a/doc/ffmpeg-doc.texi
+++ b/doc/ffmpeg-doc.texi
@@ -698,6 +698,8 @@ library:
@item Nullsoft Video (NSV) format @tab @tab X
@item ADTS AAC audio @tab X @tab X
@item Creative VOC @tab X @tab X @tab Created for the Sound Blaster Pro.
+ at item American Laser Games MM @tab @tab X
+ at tab Multimedia format used in games like Mad Dog McCree
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
@@ -788,6 +790,7 @@ following image formats are supported:
@item Autodesk Animator Studio Codec @tab @tab X @tab fourcc: AASC
@item Fraps FPS1 @tab @tab X @tab
@item CamStudio @tab @tab X @tab fourcc: CSCD
+ at item American Laser Games Video @tab @tab X @tab Used in games like Mad Dog McCree
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 9437f3e..aa8fbe5 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -218,6 +218,9 @@ endif
ifeq ($(CONFIG_BMP_DECODER),yes)
OBJS+= bmp.o
endif
+ifeq ($(CONFIG_MMVIDEO_DECODER),yes)
+ OBJS+= mmvideo.o
+endif
AMROBJS=
ifeq ($(AMR_NB),yes)
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index e78312d..89ff990 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -539,6 +539,10 @@ void avcodec_register_all(void)
register_avcodec(&bmp_decoder);
#endif
+#if CONFIG_MMVIDEO_DECODER
+ register_avcodec(&mmvideo_decoder);
+#endif //CONFIG_MMVIDEO_DECODER
+
/* pcm codecs */
#if defined (CONFIG_ENCODERS) && defined (CONFIG_DECODERS)
#define PCM_CODEC(id, name) \
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 513c88d..d29d258 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -115,6 +115,7 @@ enum CodecID {
CODEC_ID_TRUEMOTION2,
CODEC_ID_BMP,
CODEC_ID_CSCD,
+ CODEC_ID_MMVIDEO,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
@@ -2226,6 +2227,7 @@ extern AVCodec fraps_decoder;
extern AVCodec libgsm_encoder;
extern AVCodec libgsm_decoder;
extern AVCodec bmp_decoder;
+extern AVCodec mmvideo_decoder;
/* pcm codecs */
#define PCM_CODEC(id, name) \
diff --git a/libavcodec/mmvideo.c b/libavcodec/mmvideo.c
new file mode 100644
index 0000000..b2e1468
--- /dev/null
+++ b/libavcodec/mmvideo.c
@@ -0,0 +1,204 @@
+/*
+ * American Laser Games MM Video Decoder
+ * Copyright (c) 2006 Peter Ross
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/**
+ * @file mm.c
+ * American Laser Games MM Video Decoder
+ * by Peter Ross (suxen_drol at hotmail dot com)
+ *
+ * The MM format was used by IBM-PC ports of ALG's "arcade shooter" games,
+ * including Mad Dog McCree and Crime Patrol.
+ *
+ * Technical details here:
+ * http://wiki.multimedia.cx/index.php?title=American_Laser_Games_MM
+ */
+
+#include "avcodec.h"
+
+#define MM_PREAMBLE_SIZE 6
+
+#define MM_TYPE_INTER 0x5
+#define MM_TYPE_INTRA 0x8
+#define MM_TYPE_INTRA_HH 0xc
+#define MM_TYPE_INTER_HH 0xd
+#define MM_TYPE_INTRA_HHV 0xe
+#define MM_TYPE_INTER_HHV 0xf
+
+typedef struct MmContext {
+ AVCodecContext *avctx;
+ AVFrame frame;
+} MmContext;
+
+static int mm_decode_init(AVCodecContext *avctx)
+{
+ MmContext *s = avctx->priv_data;
+
+ s->avctx = avctx;
+
+ if (s->avctx->palctrl == NULL) {
+ av_log(avctx, AV_LOG_ERROR, "mmvideo: palette expected.\n");
+ return -1;
+ }
+
+ avctx->pix_fmt = PIX_FMT_PAL8;
+ avctx->has_b_frames = 0;
+
+ if (avcodec_check_dimensions(avctx, avctx->width, avctx->height))
+ return -1;
+
+ s->frame.reference = 1;
+ if (avctx->get_buffer(avctx, &s->frame)) {
+ av_log(s->avctx, AV_LOG_ERROR, "mmvideo: get_buffer() failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static void mm_decode_intra(MmContext * s, int half_horiz, int half_vert, const uint8_t *buf, int buf_size)
+{
+ int i, x, y;
+ i=0; x=0; y=0;
+
+ while(i<buf_size) {
+ int run_length, color;
+
+ if (buf[i] & 0x80) {
+ run_length = 1;
+ color = buf[i];
+ i++;
+ }else{
+ run_length = (buf[i] & 0x7f) + 2;
+ color = buf[i+1];
+ i+=2;
+ }
+
+ if (half_horiz)
+ run_length *=2;
+
+ if (color) {
+ memset(s->frame.data[0] + y*s->frame.linesize[0] + x, color, run_length);
+ if (half_vert)
+ memset(s->frame.data[0] + (y+1)*s->frame.linesize[0] + x, color, run_length);
+ }
+ x+= run_length;
+
+ if (x >= s->avctx->width) {
+ x=0;
+ y += half_vert ? 2 : 1;
+ }
+ }
+}
+
+static void mm_decode_inter(MmContext * s, int half_horiz, int half_vert, const uint8_t *buf, int buf_size)
+{
+ const int data_ptr = 2 + LE_16(&buf[0]);
+ int d, r, y;
+ d = data_ptr; r = 2; y = 0;
+
+ while(r < data_ptr) {
+ int i, j;
+ int length = buf[r] & 0x7f;
+ int x = buf[r+1] + ((buf[r] & 0x80) << 1);
+ r += 2;
+
+ if (length==0) {
+ y += x;
+ continue;
+ }
+
+ for(i=0; i<length; i++) {
+ for(j=0; j<8; j++) {
+ int replace = (buf[r+i] >> (7-j)) & 1;
+ if (replace) {
+ int color = buf[d];
+ s->frame.data[0][y*s->frame.linesize[0] + x] = color;
+ if (half_horiz)
+ s->frame.data[0][y*s->frame.linesize[0] + x + 1] = color;
+ if (half_vert) {
+ s->frame.data[0][(y+1)*s->frame.linesize[0] + x] = color;
+ if (half_horiz)
+ s->frame.data[0][(y+1)*s->frame.linesize[0] + x + 1] = color;
+ }
+ d++;
+ }
+ x += half_horiz ? 2 : 1;
+ }
+ }
+
+ r += length;
+ y += half_vert ? 2 : 1;
+ }
+}
+
+static int mm_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ MmContext *s = avctx->priv_data;
+ AVPaletteControl *palette_control = avctx->palctrl;
+ int type;
+
+ if (palette_control->palette_changed) {
+ memcpy(s->frame.data[1], palette_control->palette, AVPALETTE_SIZE);
+ palette_control->palette_changed = 0;
+ }
+
+ type = LE_16(&buf[0]);
+ buf += MM_PREAMBLE_SIZE;
+ buf_size -= MM_PREAMBLE_SIZE;
+
+ switch(type) {
+ case MM_TYPE_INTRA : mm_decode_intra(s, 0, 0, buf, buf_size); break;
+ case MM_TYPE_INTRA_HH : mm_decode_intra(s, 1, 0, buf, buf_size); break;
+ case MM_TYPE_INTRA_HHV : mm_decode_intra(s, 1, 1, buf, buf_size); break;
+ case MM_TYPE_INTER : mm_decode_inter(s, 0, 0, buf, buf_size); break;
+ case MM_TYPE_INTER_HH : mm_decode_inter(s, 1, 0, buf, buf_size); break;
+ case MM_TYPE_INTER_HHV : mm_decode_inter(s, 1, 1, buf, buf_size); break;
+ default :
+ return -1;
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = s->frame;
+
+ return buf_size;
+}
+
+static int mm_decode_end(AVCodecContext *avctx)
+{
+ MmContext *s = avctx->priv_data;
+
+ if(s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
+
+ return 0;
+}
+
+AVCodec mmvideo_decoder = {
+ "mmvideo",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_MMVIDEO,
+ sizeof(MmContext),
+ mm_decode_init,
+ NULL,
+ mm_decode_end,
+ mm_decode_frame,
+ CODEC_CAP_DR1,
+};
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 2621f90..381b046 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -23,7 +23,7 @@ OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o img2.o raw.o rm.o \
nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \
sierravmd.o matroska.o sol.o electronicarts.o nsvdec.o asf.o \
ogg2.o oggparsevorbis.o oggparsetheora.o oggparseflac.o daud.o aiff.o \
- voc.o tta.o
+ voc.o tta.o mm.o
# muxers
ifeq ($(CONFIG_MUXERS),yes)
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 2fea324..1341621 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -79,6 +79,7 @@ void av_register_all(void)
idcin_init();
flic_init();
vmd_init();
+ mm_init();
#if defined(AMR_NB) || defined(AMR_NB_FIXED) || defined(AMR_WB)
amr_init();
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index f04fbb1..c01f6ef 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -561,6 +561,9 @@ int tta_init(void);
/* adts.c */
int ff_adts_init(void);
+/* mm.c */
+int mm_init(void);
+
#include "rtp.h"
#include "rtsp.h"
diff --git a/libavformat/mm.c b/libavformat/mm.c
new file mode 100644
index 0000000..aa857d4
--- /dev/null
+++ b/libavformat/mm.c
@@ -0,0 +1,216 @@
+/*
+ * American Laser Games MM Format Demuxer
+ * Copyright (c) 2006 Peter Ross
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/**
+ * @file mm.c
+ * American Laser Games MM Format Demuxer
+ * by Peter Ross (suxen_drol at hotmail dot com)
+ *
+ * The MM format was used by IBM-PC ports of ALG's "arcade shooter" games,
+ * including Mad Dog McCree and Crime Patrol.
+ *
+ * Technical details here:
+ * http://wiki.multimedia.cx/index.php?title=American_Laser_Games_MM
+ */
+
+#include "avformat.h"
+
+#define MM_PREAMBLE_SIZE 6
+
+#define MM_TYPE_HEADER 0x0
+#define MM_TYPE_INTER 0x5
+#define MM_TYPE_INTRA 0x8
+#define MM_TYPE_INTRA_HH 0xc
+#define MM_TYPE_INTER_HH 0xd
+#define MM_TYPE_INTRA_HHV 0xe
+#define MM_TYPE_INTER_HHV 0xf
+#define MM_TYPE_AUDIO 0x15
+#define MM_TYPE_PALETTE 0x31
+
+#define MM_HEADER_LEN_V 0x16 /* video only */
+#define MM_HEADER_LEN_AV 0x18 /* video + audio */
+
+#define MM_PALETTE_COUNT 128
+#define MM_PALETTE_SIZE (MM_PALETTE_COUNT*3)
+
+typedef struct {
+ AVPaletteControl palette_control;
+ unsigned int audio_pts, video_pts;
+} MmDemuxContext;
+
+static int mm_probe(AVProbeData *p)
+{
+ /* the first chunk is always the header */
+ if (p->buf_size < MM_PREAMBLE_SIZE)
+ return 0;
+ if (LE_16(&p->buf[0]) != MM_TYPE_HEADER)
+ return 0;
+ if (LE_32(&p->buf[2]) != MM_HEADER_LEN_V && LE_32(&p->buf[2]) != MM_HEADER_LEN_AV)
+ return 0;
+
+ /* only return half certainty since this check is a bit sketchy */
+ return AVPROBE_SCORE_MAX / 2;
+}
+
+static int mm_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ MmDemuxContext *mm = (MmDemuxContext *)s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ AVStream *st;
+
+ unsigned int type, length;
+ unsigned int frame_rate, width, height;
+
+ type = get_le16(pb);
+ length = get_le32(pb);
+
+ if (type != MM_TYPE_HEADER)
+ return AVERROR_INVALIDDATA;
+
+ /* read header */
+ get_le16(pb); /* total number of chunks */
+ frame_rate = get_le16(pb);
+ get_le16(pb); /* ibm-pc video bios mode */
+ width = get_le16(pb);
+ height = get_le16(pb);
+ url_fseek(pb, length - 10, SEEK_CUR); /* unknown data */
+
+ /* video stream */
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR_NOMEM;
+ st->codec->codec_type = CODEC_TYPE_VIDEO;
+ st->codec->codec_id = CODEC_ID_MMVIDEO;
+ st->codec->codec_tag = 0; /* no fourcc */
+ st->codec->width = width;
+ st->codec->height = height;
+ st->codec->palctrl = &mm->palette_control;
+ av_set_pts_info(st, 64, 1, frame_rate);
+
+ /* audio stream */
+ if (length == MM_HEADER_LEN_AV) {
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR_NOMEM;
+ st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_tag = 0; /* no fourcc */
+ st->codec->codec_id = CODEC_ID_PCM_U8;
+ st->codec->channels = 1;
+ st->codec->sample_rate = 8000;
+ av_set_pts_info(st, 64, 1, 8000); /* 8000 hz */
+ }
+
+ mm->palette_control.palette_changed = 0;
+ mm->audio_pts = 0;
+ mm->video_pts = 0;
+ return 0;
+}
+
+static int mm_read_packet(AVFormatContext *s,
+ AVPacket *pkt)
+{
+ MmDemuxContext *mm = (MmDemuxContext *)s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ unsigned char preamble[MM_PREAMBLE_SIZE];
+ unsigned char pal[MM_PALETTE_SIZE];
+ unsigned int type, length;
+ int i;
+
+ while(1) {
+
+ if (get_buffer(pb, preamble, MM_PREAMBLE_SIZE) != MM_PREAMBLE_SIZE) {
+ return AVERROR_IO;
+ }
+
+ type = LE_16(&preamble[0]);
+ length = LE_16(&preamble[2]);
+
+ switch(type) {
+ case MM_TYPE_PALETTE :
+ url_fseek(pb, 4, SEEK_CUR); /* unknown data */
+ if (get_buffer(pb, pal, MM_PALETTE_SIZE) != MM_PALETTE_SIZE)
+ return AVERROR_IO;
+ url_fseek(pb, length - (4 + MM_PALETTE_SIZE), SEEK_CUR);
+
+ for (i=0; i<MM_PALETTE_COUNT; i++) {
+ int r = pal[i*3 + 0];
+ int g = pal[i*3 + 1];
+ int b = pal[i*3 + 2];
+ mm->palette_control.palette[i] = (r << 16) | (g << 8) | (b);
+ /* repeat palette, where each components is multiplied by four */
+ mm->palette_control.palette[i+128] = (r << 18) | (g << 10) | (b<<2);
+ }
+ mm->palette_control.palette_changed = 1;
+ break;
+
+ case MM_TYPE_INTER :
+ case MM_TYPE_INTRA :
+ case MM_TYPE_INTRA_HH :
+ case MM_TYPE_INTER_HH :
+ case MM_TYPE_INTRA_HHV :
+ case MM_TYPE_INTER_HHV :
+ /* output preamble + data */
+ if (av_new_packet(pkt, length + MM_PREAMBLE_SIZE))
+ return AVERROR_NOMEM;
+ memcpy(pkt->data, preamble, MM_PREAMBLE_SIZE);
+ if (get_buffer(pb, pkt->data + MM_PREAMBLE_SIZE, length) != length)
+ return AVERROR_IO;
+ pkt->size = length + MM_PREAMBLE_SIZE;
+ pkt->stream_index = 0;
+ pkt->pts = mm->video_pts++;
+ return 0;
+
+ case MM_TYPE_AUDIO :
+ if (av_get_packet(&s->pb, pkt, length)<0)
+ return AVERROR_NOMEM;
+ pkt->size = length;
+ pkt->stream_index = 1;
+ pkt->pts = mm->audio_pts++;
+ return 0;
+
+ default :
+ av_log(NULL, AV_LOG_INFO, "mm: unknown chunk type 0x%x\n", type);
+ url_fseek(pb, length, SEEK_CUR);
+ }
+ }
+
+ return 0;
+}
+
+static int mm_read_close(AVFormatContext *s)
+{
+ return 0;
+}
+
+static AVInputFormat mm_iformat = {
+ "mm",
+ "American Laser Games MM format",
+ sizeof(MmDemuxContext),
+ mm_probe,
+ mm_read_header,
+ mm_read_packet,
+ mm_read_close,
+};
+
+int mm_init(void)
+{
+ av_register_input_format(&mm_iformat);
+ return 0;
+}
--
Libav/FFmpeg packaging
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