Merge commit '7570c9e04f010c9b3bfdeb4338d330f2cdd25278'
[ffmpeg.git] / libavformat / swfdec.c
index 7b5cd35..eb17e82 100644 (file)
@@ -3,20 +3,20 @@
  * Copyright (c) 2000 Fabrice Bellard
  * Copyright (c) 2003 Tinic Uro
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <zlib.h>
 #endif
 
+#include "libavutil/avassert.h"
 #include "libavutil/channel_layout.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
 #include "libavutil/intreadwrite.h"
+#include "libavcodec/get_bits.h"
 #include "swf.h"
 
 static const AVCodecTag swf_audio_codec_tags[] = {
@@ -43,8 +47,8 @@ static int get_swf_tag(AVIOContext *pb, int *len_ptr)
 {
     int tag, len;
 
-    if (pb->eof_reached)
-        return -1;
+    if (avio_feof(pb))
+        return AVERROR_EOF;
 
     tag = avio_rl16(pb);
     len = tag & 0x3f;
@@ -59,12 +63,39 @@ static int get_swf_tag(AVIOContext *pb, int *len_ptr)
 
 static int swf_probe(AVProbeData *p)
 {
+    GetBitContext gb;
+    int len, xmin, xmax, ymin, ymax;
+
+    if(p->buf_size < 15)
+        return 0;
+
     /* check file header */
-    if ((p->buf[0] == 'F' || p->buf[0] == 'C') && p->buf[1] == 'W' &&
-        p->buf[2] == 'S')
-        return AVPROBE_SCORE_MAX;
-    else
+    if (   AV_RB24(p->buf) != AV_RB24("CWS")
+        && AV_RB24(p->buf) != AV_RB24("FWS"))
+        return 0;
+
+    if (   AV_RB24(p->buf) == AV_RB24("CWS")
+        && p->buf[3] <= 20)
+        return AVPROBE_SCORE_MAX / 4 + 1;
+
+    if (init_get_bits8(&gb, p->buf + 3, p->buf_size - 3) < 0)
         return 0;
+
+    skip_bits(&gb, 40);
+    len = get_bits(&gb, 5);
+    if (!len)
+        return 0;
+    xmin = get_bits_long(&gb, len);
+    xmax = get_bits_long(&gb, len);
+    ymin = get_bits_long(&gb, len);
+    ymax = get_bits_long(&gb, len);
+    if (xmin || ymin || !xmax || !ymax)
+        return 0;
+
+    if (p->buf[3] >= 20 || xmax < 16 || ymax < 16)
+        return AVPROBE_SCORE_MAX / 4;
+
+    return AVPROBE_SCORE_MAX;
 }
 
 #if CONFIG_ZLIB
@@ -88,10 +119,10 @@ retry:
     z->avail_out = buf_size;
 
     ret = inflate(z, Z_NO_FLUSH);
-    if (ret != Z_OK && ret != Z_STREAM_END) {
-        av_log(s, AV_LOG_ERROR, "Inflate error: %d\n", ret);
-        return AVERROR_UNKNOWN;
-    }
+    if (ret < 0)
+        return AVERROR(EINVAL);
+    if (ret == Z_STREAM_END)
+        return AVERROR_EOF;
 
     if (buf_size - z->avail_out == 0)
         goto retry;
@@ -110,26 +141,22 @@ static int swf_read_header(AVFormatContext *s)
     avio_rl32(pb);
 
     if (tag == MKBETAG('C', 'W', 'S', 0)) {
-        av_log(s, AV_LOG_INFO, "Compressed SWF file detected\n");
+        av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");
 #if CONFIG_ZLIB
-        if (inflateInit(&swf->zstream) != Z_OK) {
-            av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");
-            return AVERROR(EINVAL);
-        }
         swf->zbuf_in  = av_malloc(ZBUF_SIZE);
         swf->zbuf_out = av_malloc(ZBUF_SIZE);
         swf->zpb = avio_alloc_context(swf->zbuf_out, ZBUF_SIZE, 0, s,
                                       zlib_refill, NULL, NULL);
-        if (!swf->zbuf_in || !swf->zbuf_out || !swf->zpb) {
-            av_freep(&swf->zbuf_in);
-            av_freep(&swf->zbuf_out);
-            av_freep(&swf->zpb);
+        if (!swf->zbuf_in || !swf->zbuf_out || !swf->zpb)
             return AVERROR(ENOMEM);
-        }
         swf->zpb->seekable = 0;
+        if (inflateInit(&swf->zstream) != Z_OK) {
+            av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");
+            return AVERROR(EINVAL);
+        }
         pb = swf->zpb;
 #else
-        av_log(s, AV_LOG_ERROR, "missing zlib support, unable to open\n");
+        av_log(s, AV_LOG_ERROR, "zlib support is required to read SWF compressed files\n");
         return AVERROR(EIO);
 #endif
     } else if (tag != MKBETAG('F', 'W', 'S', 0))
@@ -146,6 +173,32 @@ static int swf_read_header(AVFormatContext *s)
     return 0;
 }
 
+static AVStream *create_new_audio_stream(AVFormatContext *s, int id, int info)
+{
+    int sample_rate_code, sample_size_code;
+    AVStream *ast = avformat_new_stream(s, NULL);
+    if (!ast)
+        return NULL;
+    ast->id = id;
+    if (info & 1) {
+        ast->codec->channels       = 2;
+        ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+    } else {
+        ast->codec->channels       = 1;
+        ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
+    }
+    ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    ast->codec->codec_id   = ff_codec_get_id(swf_audio_codec_tags, info>>4 & 15);
+    ast->need_parsing = AVSTREAM_PARSE_FULL;
+    sample_rate_code = info>>2 & 3;
+    sample_size_code = info>>1 & 1;
+    if (!sample_size_code && ast->codec->codec_id == AV_CODEC_ID_PCM_S16LE)
+        ast->codec->codec_id = AV_CODEC_ID_PCM_U8;
+    ast->codec->sample_rate = 44100 >> (3 - sample_rate_code);
+    avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
+    return ast;
+}
+
 static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     SWFContext *swf = s->priv_data;
@@ -162,7 +215,7 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
         uint64_t pos = avio_tell(pb);
         tag = get_swf_tag(pb, &len);
         if (tag < 0)
-            return AVERROR(EIO);
+            return tag;
         if (len < 0) {
             av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
             return AVERROR_INVALIDDATA;
@@ -184,7 +237,7 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
             /* Check for FLV1 */
             vst = avformat_new_stream(s, NULL);
             if (!vst)
-                return -1;
+                return AVERROR(ENOMEM);
             vst->id = ch_id;
             vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
             vst->codec->codec_id = ff_codec_get_id(ff_swf_codec_tags, avio_r8(pb));
@@ -192,7 +245,6 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
             len -= 8;
         } else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {
             /* streaming found */
-            int sample_rate_code;
 
             for (i=0; i<s->nb_streams; i++) {
                 st = s->streams[i];
@@ -203,24 +255,38 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
             avio_r8(pb);
             v = avio_r8(pb);
             swf->samples_per_frame = avio_rl16(pb);
-            ast = avformat_new_stream(s, NULL);
+            ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */
             if (!ast)
-                return -1;
-            ast->id = -1; /* -1 to avoid clash with video stream ch_id */
-            if (v & 1) {
-                ast->codec->channels       = 2;
-                ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
-            } else {
-                ast->codec->channels       = 1;
-                ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
-            }
-            ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
-            ast->codec->codec_id = ff_codec_get_id(swf_audio_codec_tags, (v>>4) & 15);
-            ast->need_parsing = AVSTREAM_PARSE_FULL;
-            sample_rate_code= (v>>2) & 3;
-            ast->codec->sample_rate = 44100 >> (3 - sample_rate_code);
-            avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
+                return AVERROR(ENOMEM);
             len -= 4;
+        } else if (tag == TAG_DEFINESOUND) {
+            /* audio stream */
+            int ch_id = avio_rl16(pb);
+
+            for (i=0; i<s->nb_streams; i++) {
+                st = s->streams[i];
+                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->id == ch_id)
+                    goto skip;
+            }
+
+            // FIXME: The entire audio stream is stored in a single chunk/tag. Normally,
+            // these are smaller audio streams in DEFINESOUND tags, but it's technically
+            // possible they could be huge. Break it up into multiple packets if it's big.
+            v = avio_r8(pb);
+            ast = create_new_audio_stream(s, ch_id, v);
+            if (!ast)
+                return AVERROR(ENOMEM);
+            ast->duration = avio_rl32(pb); // number of samples
+            if (((v>>4) & 15) == 2) { // MP3 sound data record
+                ast->skip_samples = avio_rl16(pb);
+                len -= 2;
+            }
+            len -= 7;
+            if ((res = av_get_packet(pb, pkt, len)) < 0)
+                return res;
+            pkt->pos = pos;
+            pkt->stream_index = ast->index;
+            return pkt->size;
         } else if (tag == TAG_VIDEOFRAME) {
             int ch_id = avio_rl16(pb);
             len -= 2;
@@ -239,6 +305,141 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
                     return pkt->size;
                 }
             }
+        } else if (tag == TAG_DEFINEBITSLOSSLESS || tag == TAG_DEFINEBITSLOSSLESS2) {
+#if CONFIG_ZLIB
+            long out_len;
+            uint8_t *buf = NULL, *zbuf = NULL, *pal;
+            uint32_t colormap[AVPALETTE_COUNT] = {0};
+            const int alpha_bmp = tag == TAG_DEFINEBITSLOSSLESS2;
+            const int colormapbpp = 3 + alpha_bmp;
+            int linesize, colormapsize = 0;
+
+            const int ch_id   = avio_rl16(pb);
+            const int bmp_fmt = avio_r8(pb);
+            const int width   = avio_rl16(pb);
+            const int height  = avio_rl16(pb);
+            int pix_fmt;
+
+            len -= 2+1+2+2;
+
+            switch (bmp_fmt) {
+            case 3: // PAL-8
+                linesize = width;
+                colormapsize = avio_r8(pb) + 1;
+                len--;
+                break;
+            case 4: // RGB15
+                linesize = width * 2;
+                break;
+            case 5: // RGB24 (0RGB)
+                linesize = width * 4;
+                break;
+            default:
+                av_log(s, AV_LOG_ERROR, "invalid bitmap format %d, skipped\n", bmp_fmt);
+                goto bitmap_end_skip;
+            }
+
+            linesize = FFALIGN(linesize, 4);
+
+            if (av_image_check_size(width, height, 0, s) < 0 ||
+                linesize >= INT_MAX / height ||
+                linesize * height >= INT_MAX - colormapsize * colormapbpp) {
+                av_log(s, AV_LOG_ERROR, "invalid frame size %dx%d\n", width, height);
+                goto bitmap_end_skip;
+            }
+
+            out_len = colormapsize * colormapbpp + linesize * height;
+
+            ff_dlog(s, "bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
+                    ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);
+
+            zbuf = av_malloc(len);
+            buf  = av_malloc(out_len);
+            if (!zbuf || !buf) {
+                res = AVERROR(ENOMEM);
+                goto bitmap_end;
+            }
+
+            len = avio_read(pb, zbuf, len);
+            if (len < 0 || (res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {
+                av_log(s, AV_LOG_WARNING, "Failed to uncompress one bitmap\n");
+                goto bitmap_end_skip;
+            }
+
+            for (i = 0; i < s->nb_streams; i++) {
+                st = s->streams[i];
+                if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && st->id == -3)
+                    break;
+            }
+            if (i == s->nb_streams) {
+                vst = avformat_new_stream(s, NULL);
+                if (!vst) {
+                    res = AVERROR(ENOMEM);
+                    goto bitmap_end;
+                }
+                vst->id = -3; /* -3 to avoid clash with video stream and audio stream */
+                vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+                vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+                avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
+                st = vst;
+            }
+
+            if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
+                goto bitmap_end;
+            if (!st->codec->width && !st->codec->height) {
+                st->codec->width  = width;
+                st->codec->height = height;
+            } else {
+                ff_add_param_change(pkt, 0, 0, 0, width, height);
+            }
+            pkt->pos = pos;
+            pkt->stream_index = st->index;
+
+            switch (bmp_fmt) {
+            case 3:
+                pix_fmt = AV_PIX_FMT_PAL8;
+                for (i = 0; i < colormapsize; i++)
+                    if (alpha_bmp)  colormap[i] = buf[3]<<24 | AV_RB24(buf + 4*i);
+                    else            colormap[i] = 0xffU <<24 | AV_RB24(buf + 3*i);
+                pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
+                if (!pal) {
+                    res = AVERROR(ENOMEM);
+                    goto bitmap_end;
+                }
+                memcpy(pal, colormap, AVPALETTE_SIZE);
+                break;
+            case 4:
+                pix_fmt = AV_PIX_FMT_RGB555;
+                break;
+            case 5:
+                pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;
+                break;
+            default:
+                av_assert0(0);
+            }
+            if (st->codec->pix_fmt != AV_PIX_FMT_NONE && st->codec->pix_fmt != pix_fmt) {
+                av_log(s, AV_LOG_ERROR, "pixel format change unsupported\n");
+            } else
+                st->codec->pix_fmt = pix_fmt;
+
+            if (linesize * height > pkt->size) {
+                res = AVERROR_INVALIDDATA;
+                goto bitmap_end;
+            }
+            memcpy(pkt->data, buf + colormapsize*colormapbpp, linesize * height);
+
+            res = pkt->size;
+
+bitmap_end:
+            av_freep(&zbuf);
+            av_freep(&buf);
+            return res;
+bitmap_end_skip:
+            av_freep(&zbuf);
+            av_freep(&buf);
+#else
+            av_log(s, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
+#endif
         } else if (tag == TAG_STREAMBLOCK) {
             for (i = 0; i < s->nb_streams; i++) {
                 st = s->streams[i];
@@ -270,7 +471,7 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
             if (i == s->nb_streams) {
                 vst = avformat_new_stream(s, NULL);
                 if (!vst)
-                    return -1;
+                    return AVERROR(ENOMEM);
                 vst->id = -2; /* -2 to avoid clash with video stream and audio stream */
                 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
                 vst->codec->codec_id = AV_CODEC_ID_MJPEG;
@@ -283,21 +484,39 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
                 goto skip;
             if ((res = av_new_packet(pkt, len)) < 0)
                 return res;
-            avio_read(pb, pkt->data, 4);
+            if (avio_read(pb, pkt->data, 4) != 4) {
+                av_packet_unref(pkt);
+                return AVERROR_INVALIDDATA;
+            }
             if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
                 AV_RB32(pkt->data) == 0xffd9ffd8) {
                 /* old SWF files containing SOI/EOI as data start */
                 /* files created by swink have reversed tag */
                 pkt->size -= 4;
-                avio_read(pb, pkt->data, pkt->size);
+                memset(pkt->data+pkt->size, 0, 4);
+                res = avio_read(pb, pkt->data, pkt->size);
             } else {
-                avio_read(pb, pkt->data + 4, pkt->size - 4);
+                res = avio_read(pb, pkt->data + 4, pkt->size - 4);
+                if (res >= 0)
+                    res += 4;
             }
+            if (res != pkt->size) {
+                if (res < 0) {
+                    av_packet_unref(pkt);
+                    return res;
+                }
+                av_shrink_packet(pkt, res);
+            }
+
             pkt->pos = pos;
             pkt->stream_index = st->index;
             return pkt->size;
+        } else {
+            av_log(s, AV_LOG_DEBUG, "Unknown tag: %d\n", tag);
         }
     skip:
+        if(len<0)
+            av_log(s, AV_LOG_WARNING, "Cliping len %d\n", len);
         len = FFMAX(0, len);
         avio_skip(pb, len);
     }