LucasArts SMUSH demuxer

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

1 files changed, 256 insertions, 0 deletions

diff --git a/libavformat/smush.c b/libavformat/smush.c
new file mode 100644
index 0000000000..1615b45417
--- /dev/null
+++ b/libavformat/smush.c
@@ -0,0 +1,256 @@
+/*
+ * LucasArts Smush demuxer
+ * Copyright (c) 2006 Cyril Zorin
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; 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"
+#include "avio.h"
+#include "internal.h"
+
+typedef struct SMUSHContext {
+    int version;
+    int audio_stream_index;
+    int video_stream_index;
+} SMUSHContext;
+
+static int smush_read_probe(AVProbeData *p)
+{
+    if (((AV_RL32(p->buf)     == MKTAG('S', 'A', 'N', 'M') &&
+          AV_RL32(p->buf + 8) == MKTAG('S', 'H', 'D', 'R')) ||
+         (AV_RL32(p->buf)     == MKTAG('A', 'N', 'I', 'M') &&
+          AV_RL32(p->buf + 8) == MKTAG('A', 'H', 'D', 'R')))) {
+        return AVPROBE_SCORE_MAX;
+    }
+
+    return 0;
+}
+
+static int smush_read_header(AVFormatContext *ctx)
+{
+    SMUSHContext *smush = ctx->priv_data;
+    AVIOContext *pb = ctx->pb;
+    AVStream *vst, *ast;
+    uint32_t magic, nframes, size, subversion, i;
+    uint32_t width = 0, height = 0, got_audio = 0, read = 0;
+    uint32_t sample_rate, channels, palette[256];
+
+    magic = avio_rb32(pb);
+    avio_skip(pb, 4); // skip movie size
+
+    if (magic == MKBETAG('A', 'N', 'I', 'M')) {
+        if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
+            return AVERROR_INVALIDDATA;
+
+        size = avio_rb32(pb);
+        if (size < 3 * 256 + 6)
+            return AVERROR_INVALIDDATA;
+
+        smush->version = 0;
+        subversion     = avio_rl16(pb);
+        nframes        = avio_rl16(pb);
+        if (!nframes)
+            return AVERROR_INVALIDDATA;
+
+        avio_skip(pb, 2); // skip pad
+
+        for (i = 0; i < 256; i++)
+            palette[i] = avio_rb24(pb);
+
+        avio_skip(pb, size - (3 * 256 + 6));
+    } else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
+        if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
+            return AVERROR_INVALIDDATA;
+
+        size = avio_rb32(pb);
+        if (size < 14)
+            return AVERROR_INVALIDDATA;
+
+        smush->version = 1;
+        subversion = avio_rl16(pb);
+        nframes = avio_rl32(pb);
+        if (!nframes)
+            return AVERROR_INVALIDDATA;
+
+        avio_skip(pb, 2); // skip pad
+        width  = avio_rl16(pb);
+        height = avio_rl16(pb);
+        avio_skip(pb, 2); // skip pad
+        avio_skip(pb, size - 14);
+
+        if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
+            return AVERROR_INVALIDDATA;
+
+        size = avio_rb32(pb);
+        while (!got_audio && ((read + 8) < size)) {
+            uint32_t sig, chunk_size;
+
+            if (pb->eof_reached)
+                return AVERROR_EOF;
+
+            sig        = avio_rb32(pb);
+            chunk_size = avio_rb32(pb);
+            read      += 8;
+            switch (sig) {
+            case MKBETAG('W', 'a', 'v', 'e'):
+                got_audio = 1;
+                sample_rate = avio_rl32(pb);
+                if (!sample_rate)
+                    return AVERROR_INVALIDDATA;
+
+                channels = avio_rl32(pb);
+                if (!channels)
+                    return AVERROR_INVALIDDATA;
+
+                avio_skip(pb, chunk_size - 8);
+                read += chunk_size;
+                break;
+            case MKBETAG('B', 'l', '1', '6'):
+            case MKBETAG('A', 'N', 'N', 'O'):
+                avio_skip(pb, chunk_size);
+                read += chunk_size;
+                break;
+            default:
+                return AVERROR_INVALIDDATA;
+                break;
+            }
+        }
+
+        avio_skip(pb, size - read);
+    } else {
+        av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    vst = avformat_new_stream(ctx, 0);
+    if (!vst)
+        return AVERROR(ENOMEM);
+
+    smush->video_stream_index = vst->index;
+
+    avpriv_set_pts_info(vst, 64, 1, 15);
+
+    vst->start_time        = 0;
+    vst->duration          =
+    vst->nb_frames         = nframes;
+    vst->avg_frame_rate    = av_inv_q(vst->time_base);
+    vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    vst->codec->codec_id   = AV_CODEC_ID_SANM;
+    vst->codec->codec_tag  = 0;
+    vst->codec->width      = width;
+    vst->codec->height     = height;
+
+    if (!smush->version) {
+        av_free(vst->codec->extradata);
+        vst->codec->extradata_size = 1024 + 2;
+        vst->codec->extradata = av_malloc(vst->codec->extradata_size +
+                                          FF_INPUT_BUFFER_PADDING_SIZE);
+        if (!vst->codec->extradata)
+            return AVERROR(ENOMEM);
+
+        AV_WL16(vst->codec->extradata, subversion);
+        for (i = 0; i < 256; i++)
+            AV_WL32(vst->codec->extradata + 2 + i * 4, palette[i]);
+    }
+
+    if (got_audio) {
+        ast = avformat_new_stream(ctx, 0);
+        if (!ast)
+            return AVERROR(ENOMEM);
+
+        smush->audio_stream_index = ast->index;
+
+        ast->start_time         = 0;
+        ast->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
+        ast->codec->codec_id    = AV_CODEC_ID_ADPCM_VIMA;
+        ast->codec->codec_tag   = 0;
+        ast->codec->sample_rate = sample_rate;
+        ast->codec->channels    = channels;
+
+        avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
+    }
+
+    return 0;
+}
+
+static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
+{
+    SMUSHContext *smush = ctx->priv_data;
+    AVIOContext *pb = ctx->pb;
+    int done = 0;
+    int ret;
+
+    while (!done) {
+        uint32_t sig, size;
+
+        if (pb->eof_reached)
+            return AVERROR_EOF;
+
+        sig  = avio_rb32(pb);
+        size = avio_rb32(pb);
+
+        switch (sig) {
+        case MKBETAG('F', 'R', 'M', 'E'):
+            if (smush->version)
+                break;
+            if ((ret = av_get_packet(pb, pkt, size)) < 0)
+                return ret;
+
+            pkt->stream_index = smush->video_stream_index;
+            done = 1;
+            break;
+        case MKBETAG('B', 'l', '1', '6'):
+            if ((ret = av_get_packet(pb, pkt, size)) < 0)
+                return ret;
+
+            pkt->stream_index = smush->video_stream_index;
+            pkt->duration = 1;
+            done = 1;
+            break;
+        case MKBETAG('W', 'a', 'v', 'e'):
+            if (size < 13)
+                return AVERROR_INVALIDDATA;
+            if (av_get_packet(pb, pkt, size) < 13)
+                return AVERROR(EIO);
+
+            pkt->stream_index = smush->audio_stream_index;
+            pkt->flags       |= AV_PKT_FLAG_KEY;
+            pkt->duration     = AV_RB32(pkt->data);
+            if (pkt->duration == 0xFFFFFFFFu)
+                pkt->duration = AV_RB32(pkt->data + 8);
+            done = 1;
+            break;
+        default:
+            avio_skip(pb, size);
+            break;
+        }
+    }
+
+    return 0;
+}
+
+AVInputFormat ff_smush_demuxer = {
+    .name           = "smush",
+    .long_name      = NULL_IF_CONFIG_SMALL("LucasArts Smush"),
+    .priv_data_size = sizeof(SMUSHContext),
+    .read_probe     = smush_read_probe,
+    .read_header    = smush_read_header,
+    .read_packet    = smush_read_packet,
+};