Smacker demuxer and decoder.

Originally committed as revision 5189 to svn://svn.ffmpeg.org/ffmpeg/trunk

4 files changed, 350 insertions, 3 deletions

diff --git a/libavformat/Makefile b/libavformat/Makefile
index 1a8f2b7121..86cb0cca5a 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -18,7 +18,7 @@ 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 mm.o avs.o
+      voc.o tta.o mm.o avs.o smacker.o
 
 # muxers
 ifeq ($(CONFIG_MUXERS),yes)
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 7d2241447c..978e089d63 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -80,6 +80,7 @@ void av_register_all(void)
     flic_init();
     vmd_init();
     mm_init();
+    smacker_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 f95462eb62..0d36ebdc96 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -5,8 +5,8 @@
 extern "C" {
 #endif
 
-#define LIBAVFORMAT_VERSION_INT ((50<<16)+(3<<8)+0)
-#define LIBAVFORMAT_VERSION     50.3.0
+#define LIBAVFORMAT_VERSION_INT ((50<<16)+(4<<8)+0)
+#define LIBAVFORMAT_VERSION     50.4.0
 #define LIBAVFORMAT_BUILD       LIBAVFORMAT_VERSION_INT
 
 #define LIBAVFORMAT_IDENT       "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
@@ -567,6 +567,9 @@ int mm_init(void);
 /* avs.c */
 int avs_init(void);
 
+/* smacker.c */
+int smacker_init(void);
+
 #include "rtp.h"
 
 #include "rtsp.h"
diff --git a/libavformat/smacker.c b/libavformat/smacker.c
new file mode 100644
index 0000000000..916dd84077
--- /dev/null
+++ b/libavformat/smacker.c
@@ -0,0 +1,343 @@
+/*
+ * Smacker decoder
+ * Copyright (c) 2006 Konstantin Shishkov.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * Based on http://wiki.multimedia.cx/index.php?title=Smacker
+ */
+
+#include "avformat.h"
+#include "avi.h"
+#include "bswap.h"
+
+#define SMACKER_PAL 0x01
+
+enum SAudFlags {
+    SMK_AUD_PACKED  = 0x80000000,
+    SMK_AUD_16BITS  = 0x20000000,
+    SMK_AUD_STEREO  = 0x10000000,
+    SMK_AUD_BINKAUD = 0x08000000,
+    SMK_AUD_USEDCT  = 0x04000000
+};
+
+typedef struct SmackerContext {
+    /* Smacker file header */
+    uint32_t magic;
+    uint32_t width, height;
+    uint32_t frames;
+    int      pts_inc;
+    uint32_t flags;
+    uint32_t audio[7];
+    uint32_t treesize;
+    uint32_t mmap_size, mclr_size, full_size, type_size;
+    uint32_t rates[7];
+    uint32_t pad;
+    /* frame info */
+    uint32_t *frm_size;
+    uint8_t  *frm_flags;
+    /* internal variables */
+    int cur_frame;
+    int is_ver4;
+    int64_t cur_pts;
+    /* current frame for demuxing */
+    uint8_t pal[768];
+    int indexes[7];
+    int videoindex;
+    uint8_t *bufs[7];
+    int buf_sizes[7];
+    int stream_id[7];
+    int curstream;
+    offset_t nextpos;
+} SmackerContext;
+
+typedef struct SmackerFrame {
+    int64_t pts;
+    int stream;
+} SmackerFrame;
+
+/* palette used in Smacker */
+static const uint8_t smk_pal[64] = {
+    0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
+    0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
+    0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D,
+    0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
+    0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E,
+    0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
+    0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF,
+    0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF
+};
+
+
+static int smacker_probe(AVProbeData *p)
+{
+    if (p->buf_size < 4)
+        return 0;
+    if(p->buf[0] == 'S' && p->buf[1] == 'M' && p->buf[2] == 'K'
+        && (p->buf[3] == '2' || p->buf[3] == '4'))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    ByteIOContext *pb = &s->pb;
+    SmackerContext *smk = (SmackerContext *)s->priv_data;
+    AVStream *st, *ast[7];
+    int i, ret;
+    int tbase;
+
+    /* read and check header */
+    smk->magic = get_le32(pb);
+    if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4'))
+        return -1;
+    smk->width = get_le32(pb);
+    smk->height = get_le32(pb);
+    smk->frames = get_le32(pb);
+    smk->pts_inc = (int32_t)get_le32(pb);
+    smk->flags = get_le32(pb);
+    for(i = 0; i < 7; i++)
+        smk->audio[i] = get_le32(pb);
+    smk->treesize = get_le32(pb);
+    smk->mmap_size = get_le32(pb);
+    smk->mclr_size = get_le32(pb);
+    smk->full_size = get_le32(pb);
+    smk->type_size = get_le32(pb);
+    for(i = 0; i < 7; i++)
+        smk->rates[i] = get_le32(pb);
+    smk->pad = get_le32(pb);
+    /* setup data */
+    if(smk->frames > 0xFFFFFF) {
+        av_log(s, AV_LOG_ERROR, "Too many frames: %i\n", smk->frames);
+        return -1;
+    }
+    smk->frm_size = av_malloc(smk->frames * 4);
+    smk->frm_flags = av_malloc(smk->frames);
+
+    smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2'));
+
+    /* read frame info */
+    for(i = 0; i < smk->frames; i++) {
+        smk->frm_size[i] = get_le32(pb);
+    }
+    for(i = 0; i < smk->frames; i++) {
+        smk->frm_flags[i] = get_byte(pb);
+    }
+
+    /* init video codec */
+    st = av_new_stream(s, 0);
+    if (!st)
+        return -1;
+    smk->videoindex = st->index;
+    st->codec->width = smk->width;
+    st->codec->height = smk->height;
+    st->codec->pix_fmt = PIX_FMT_PAL8;
+    st->codec->codec_type = CODEC_TYPE_VIDEO;
+    st->codec->codec_id = CODEC_ID_SMACKVIDEO;
+    st->codec->codec_tag = smk->is_ver4;
+    /* Smacker uses 100000 as internal timebase */
+    if(smk->pts_inc < 0)
+        smk->pts_inc = -smk->pts_inc;
+    else
+        smk->pts_inc *= 100;
+    tbase = 100000;
+    av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1);
+    av_set_pts_info(st, 33, smk->pts_inc, tbase);
+    /* handle possible audio streams */
+    for(i = 0; i < 7; i++) {
+        smk->indexes[i] = -1;
+        if((smk->rates[i] & 0xFFFFFF) && !(smk->rates[i] & SMK_AUD_BINKAUD)){
+            ast[i] = av_new_stream(s, 0);
+            smk->indexes[i] = ast[i]->index;
+            av_set_pts_info(ast[i], 33, smk->pts_inc, tbase);
+            ast[i]->codec->codec_type = CODEC_TYPE_AUDIO;
+            ast[i]->codec->codec_id = (smk->rates[i] & SMK_AUD_PACKED) ? CODEC_ID_SMACKAUDIO : CODEC_ID_PCM_U8;
+            ast[i]->codec->codec_tag = 0;
+            ast[i]->codec->channels = (smk->rates[i] & SMK_AUD_STEREO) ? 2 : 1;
+            ast[i]->codec->sample_rate = smk->rates[i] & 0xFFFFFF;
+            ast[i]->codec->bits_per_sample = (smk->rates[i] & SMK_AUD_16BITS) ? 16 : 8;
+            if(ast[i]->codec->bits_per_sample == 16 && ast[i]->codec->codec_id == CODEC_ID_PCM_U8)
+                ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
+        }
+    }
+
+
+    /* load trees to extradata, they will be unpacked by decoder */
+    st->codec->extradata = av_malloc(smk->treesize + 16);
+    st->codec->extradata_size = smk->treesize + 16;
+    if(!st->codec->extradata){
+        av_log(s, AV_LOG_ERROR, "Cannot allocate %i bytes of extradata\n", smk->treesize + 16);
+        av_free(smk->frm_size);
+        av_free(smk->frm_flags);
+        return -1;
+    }
+    ret = get_buffer(pb, st->codec->extradata + 16, st->codec->extradata_size - 16);
+    if(ret != st->codec->extradata_size - 16){
+        av_free(smk->frm_size);
+        av_free(smk->frm_flags);
+        return AVERROR_IO;
+    }
+    ((int32_t*)st->codec->extradata)[0] = le2me_32(smk->mmap_size);
+    ((int32_t*)st->codec->extradata)[1] = le2me_32(smk->mclr_size);
+    ((int32_t*)st->codec->extradata)[2] = le2me_32(smk->full_size);
+    ((int32_t*)st->codec->extradata)[3] = le2me_32(smk->type_size);
+
+    smk->curstream = -1;
+    smk->nextpos = url_ftell(pb);
+
+    return 0;
+}
+
+
+static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    SmackerContext *smk = (SmackerContext *)s->priv_data;
+    int flags;
+    int ret;
+    int i;
+    int frame_size = 0;
+    int palchange = 0;
+    int pos;
+
+    if (url_feof(&s->pb) || smk->cur_frame >= smk->frames)
+        return -EIO;
+
+    /* if we demuxed all streams, pass another frame */
+    if(smk->curstream < 0) {
+        url_fseek(&s->pb, smk->nextpos, 0);
+        frame_size = smk->frm_size[smk->cur_frame] & (~3);
+        flags = smk->frm_flags[smk->cur_frame];
+        /* handle palette change event */
+        pos = url_ftell(&s->pb);
+        if(flags & SMACKER_PAL){
+            int size, sz, t, off, j, pos;
+            uint8_t *pal = smk->pal;
+            uint8_t oldpal[768];
+
+            memcpy(oldpal, pal, 768);
+            size = get_byte(&s->pb);
+            size = size * 4 - 1;
+            frame_size -= size;
+            frame_size--;
+            sz = 0;
+            pos = url_ftell(&s->pb) + size;
+            while(sz < 256){
+                t = get_byte(&s->pb);
+                if(t & 0x80){ /* skip palette entries */
+                    sz += (t & 0x7F) + 1;
+                    pal += ((t & 0x7F) + 1) * 3;
+                } else if(t & 0x40){ /* copy with offset */
+                    off = get_byte(&s->pb) * 3;
+                    j = (t & 0x3F) + 1;
+                    while(j-- && sz < 256) {
+                        *pal++ = oldpal[off + 0];
+                        *pal++ = oldpal[off + 1];
+                        *pal++ = oldpal[off + 2];
+                        sz++;
+                        off += 3;
+                    }
+                } else { /* new entries */
+                    *pal++ = smk_pal[t];
+                    *pal++ = smk_pal[get_byte(&s->pb) & 0x3F];
+                    *pal++ = smk_pal[get_byte(&s->pb) & 0x3F];
+                    sz++;
+                }
+            }
+            url_fseek(&s->pb, pos, 0);
+            palchange |= 1;
+        }
+        flags >>= 1;
+        smk->curstream = -1;
+        /* if audio chunks are present, put them to stack and retrieve later */
+        for(i = 0; i < 7; i++) {
+            if(flags & 1) {
+                int size;
+                size = get_le32(&s->pb) - 4;
+                frame_size -= size;
+                frame_size -= 4;
+                smk->curstream++;
+                smk->bufs[smk->curstream] = av_realloc(smk->bufs[smk->curstream], size);
+                smk->buf_sizes[smk->curstream] = size;
+                ret = get_buffer(&s->pb, smk->bufs[smk->curstream], size);
+                if(ret != size)
+                    return AVERROR_IO;
+                smk->stream_id[smk->curstream] = smk->indexes[i];
+            }
+            flags >>= 1;
+        }
+        if (av_new_packet(pkt, frame_size + 768))
+            return AVERROR_NOMEM;
+        if(smk->frm_size[smk->cur_frame] & 1)
+            palchange |= 2;
+        pkt->data[0] = palchange;
+        memcpy(pkt->data + 1, smk->pal, 768);
+        ret = get_buffer(&s->pb, pkt->data + 769, frame_size);
+        if(ret != frame_size)
+            return AVERROR_IO;
+        pkt->stream_index = smk->videoindex;
+        pkt->size = ret + 769;
+        smk->cur_frame++;
+        smk->nextpos = url_ftell(&s->pb);
+    } else {
+        if (av_new_packet(pkt, smk->buf_sizes[smk->curstream]))
+            return AVERROR_NOMEM;
+        memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]);
+        pkt->size = smk->buf_sizes[smk->curstream];
+        pkt->stream_index = smk->stream_id[smk->curstream];
+        smk->curstream--;
+    }
+
+    return 0;
+}
+
+static int smacker_read_close(AVFormatContext *s)
+{
+    SmackerContext *smk = (SmackerContext *)s->priv_data;
+    int i;
+
+    for(i = 0; i < 7; i++)
+        if(smk->bufs[i])
+            av_free(smk->bufs[i]);
+    if(smk->frm_size)
+        av_free(smk->frm_size);
+    if(smk->frm_flags)
+        av_free(smk->frm_flags);
+
+    for(i=0;i<s->nb_streams;i++) {
+        AVStream *st = s->streams[i];
+        if(st->codec->extradata)
+            av_free(st->codec->extradata);
+    }
+    return 0;
+}
+
+static AVInputFormat smacker_iformat = {
+    "smk",
+    "Smacker Video",
+    sizeof(SmackerContext),
+    smacker_probe,
+    smacker_read_header,
+    smacker_read_packet,
+    smacker_read_close,
+};
+
+int smacker_init(void)
+{
+    av_register_input_format(&smacker_iformat);
+    return 0;
+}