* 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 "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
+#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "swf.h"
{
int tag, len;
- if (pb->eof_reached)
- return -1;
+ if (url_feof(pb))
+ return AVERROR_EOF;
tag = avio_rl16(pb);
len = tag & 0x3f;
return 0;
}
+#if CONFIG_ZLIB
+static int zlib_refill(void *opaque, uint8_t *buf, int buf_size)
+{
+ AVFormatContext *s = opaque;
+ SWFContext *swf = s->priv_data;
+ z_stream *z = &swf->zstream;
+ int ret;
+
+retry:
+ if (!z->avail_in) {
+ int n = avio_read(s->pb, swf->zbuf_in, ZBUF_SIZE);
+ if (n < 0)
+ return n;
+ z->next_in = swf->zbuf_in;
+ z->avail_in = n;
+ }
+
+ z->next_out = buf;
+ z->avail_out = buf_size;
+
+ ret = inflate(z, Z_NO_FLUSH);
+ if (ret < 0)
+ return AVERROR(EINVAL);
+ if (ret == Z_STREAM_END)
+ return AVERROR_EOF;
+
+ if (buf_size - z->avail_out == 0)
+ goto retry;
+
+ return buf_size - z->avail_out;
+}
+#endif
+
static int swf_read_header(AVFormatContext *s)
{
SWFContext *swf = s->priv_data;
int nbits, len, tag;
tag = avio_rb32(pb) & 0xffffff00;
+ avio_rl32(pb);
if (tag == MKBETAG('C', 'W', 'S', 0)) {
- av_log(s, AV_LOG_ERROR, "Compressed SWF format not supported\n");
+ av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");
+#if CONFIG_ZLIB
+ 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)
+ 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, "zlib support is required to read SWF compressed files\n");
return AVERROR(EIO);
- }
- if (tag != MKBETAG('F', 'W', 'S', 0))
+#endif
+ } else if (tag != MKBETAG('F', 'W', 'S', 0))
return AVERROR(EIO);
- avio_rl32(pb);
/* skip rectangle size */
nbits = avio_r8(pb) >> 3;
len = (4 * nbits - 3 + 7) / 8;
AVStream *vst = NULL, *ast = NULL, *st = 0;
int tag, len, i, frame, v, res;
+#if CONFIG_ZLIB
+ if (swf->zpb)
+ pb = swf->zpb;
+#endif
+
for(;;) {
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;
/* 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));
swf->samples_per_frame = avio_rl16(pb);
ast = avformat_new_stream(s, NULL);
if (!ast)
- return -1;
+ return AVERROR(ENOMEM);
ast->id = -1; /* -1 to avoid clash with video stream ch_id */
if (v & 1) {
ast->codec->channels = 2;
ast->codec->sample_rate = 44100 >> (3 - sample_rate_code);
avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
len -= 4;
+ } else if (tag == TAG_DEFINESOUND) {
+ /* audio stream */
+ int sample_rate_code;
+ 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: 8-bit uncompressed PCM audio will be interpreted as 16-bit
+ // 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 = avformat_new_stream(s, NULL);
+ if (!ast)
+ return AVERROR(ENOMEM);
+ ast->id = ch_id;
+ ast->codec->channels = 1 + (v&1);
+ 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);
+ 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;
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);
+
+ 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;
+
+ av_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;
+ }
+ st->codec->width = width;
+ st->codec->height = height;
+
+ if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
+ goto bitmap_end;
+ pkt->pos = pos;
+ pkt->stream_index = st->index;
+
+ switch (bmp_fmt) {
+ case 3:
+ st->codec->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:
+ st->codec->pix_fmt = AV_PIX_FMT_RGB555;
+ break;
+ case 5:
+ st->codec->pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;
+ break;
+ default:
+ av_assert0(0);
+ }
+
+ 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];
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;
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);
}
}
+#if CONFIG_ZLIB
+static av_cold int swf_read_close(AVFormatContext *avctx)
+{
+ SWFContext *s = avctx->priv_data;
+ inflateEnd(&s->zstream);
+ av_freep(&s->zbuf_in);
+ av_freep(&s->zbuf_out);
+ av_freep(&s->zpb);
+ return 0;
+}
+#endif
+
AVInputFormat ff_swf_demuxer = {
.name = "swf",
.long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
.read_probe = swf_probe,
.read_header = swf_read_header,
.read_packet = swf_read_packet,
+#if CONFIG_ZLIB
+ .read_close = swf_read_close,
+#endif
};
projects / ffmpeg / blobdiff