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Diffstat (limited to 'ffmpeg/libavformat/swfdec.c')
-rw-r--r--ffmpeg/libavformat/swfdec.c509
1 files changed, 0 insertions, 509 deletions
diff --git a/ffmpeg/libavformat/swfdec.c b/ffmpeg/libavformat/swfdec.c
deleted file mode 100644
index c95b18e..0000000
--- a/ffmpeg/libavformat/swfdec.c
+++ /dev/null
@@ -1,509 +0,0 @@
-/*
- * Flash Compatible Streaming Format demuxer
- * Copyright (c) 2000 Fabrice Bellard
- * Copyright (c) 2003 Tinic Uro
- *
- * This file is part of FFmpeg.
- *
- * 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.
- *
- * 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 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"
-
-static const AVCodecTag swf_audio_codec_tags[] = {
- { AV_CODEC_ID_PCM_S16LE, 0x00 },
- { AV_CODEC_ID_ADPCM_SWF, 0x01 },
- { AV_CODEC_ID_MP3, 0x02 },
- { AV_CODEC_ID_PCM_S16LE, 0x03 },
-// { AV_CODEC_ID_NELLYMOSER, 0x06 },
- { AV_CODEC_ID_NONE, 0 },
-};
-
-static int get_swf_tag(AVIOContext *pb, int *len_ptr)
-{
- int tag, len;
-
- if (url_feof(pb))
- return AVERROR_EOF;
-
- tag = avio_rl16(pb);
- len = tag & 0x3f;
- tag = tag >> 6;
- if (len == 0x3f) {
- len = avio_rl32(pb);
- }
- *len_ptr = len;
- return tag;
-}
-
-
-static int swf_probe(AVProbeData *p)
-{
- if(p->buf_size < 15)
- return 0;
-
- /* check file header */
- if ( AV_RB24(p->buf) != AV_RB24("CWS")
- && AV_RB24(p->buf) != AV_RB24("FWS"))
- return 0;
-
- if (p->buf[3] >= 20)
- return AVPROBE_SCORE_MAX / 4;
-
- return AVPROBE_SCORE_MAX;
-}
-
-#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;
- AVIOContext *pb = s->pb;
- int nbits, len, tag;
-
- tag = avio_rb32(pb) & 0xffffff00;
- avio_rl32(pb);
-
- if (tag == MKBETAG('C', 'W', 'S', 0)) {
- 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);
-#endif
- } else if (tag != MKBETAG('F', 'W', 'S', 0))
- return AVERROR(EIO);
- /* skip rectangle size */
- nbits = avio_r8(pb) >> 3;
- len = (4 * nbits - 3 + 7) / 8;
- avio_skip(pb, len);
- swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */
- avio_rl16(pb); /* frame count */
-
- swf->samples_per_frame = 0;
- s->ctx_flags |= AVFMTCTX_NOHEADER;
- 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;
- AVIOContext *pb = s->pb;
- 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 tag;
- if (len < 0) {
- av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
- return AVERROR_INVALIDDATA;
- }
- if (tag == TAG_VIDEOSTREAM) {
- int ch_id = avio_rl16(pb);
- len -= 2;
-
- for (i=0; i<s->nb_streams; i++) {
- st = s->streams[i];
- if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id)
- goto skip;
- }
-
- avio_rl16(pb);
- avio_rl16(pb);
- avio_rl16(pb);
- avio_r8(pb);
- /* Check for FLV1 */
- vst = avformat_new_stream(s, NULL);
- if (!vst)
- 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));
- avpriv_set_pts_info(vst, 16, 256, swf->frame_rate);
- len -= 8;
- } else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {
- /* streaming found */
-
- for (i=0; i<s->nb_streams; i++) {
- st = s->streams[i];
- if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1)
- goto skip;
- }
-
- avio_r8(pb);
- v = avio_r8(pb);
- swf->samples_per_frame = avio_rl16(pb);
- ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */
- if (!ast)
- 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;
- for(i=0; i<s->nb_streams; i++) {
- st = s->streams[i];
- if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
- frame = avio_rl16(pb);
- len -= 2;
- if (len <= 0)
- goto skip;
- if ((res = av_get_packet(pb, pkt, len)) < 0)
- return res;
- pkt->pos = pos;
- pkt->pts = frame;
- pkt->stream_index = st->index;
- 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 (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
- if (st->codec->codec_id == AV_CODEC_ID_MP3) {
- avio_skip(pb, 4);
- len -= 4;
- if (len <= 0)
- goto skip;
- if ((res = av_get_packet(pb, pkt, len)) < 0)
- return res;
- } else { // ADPCM, PCM
- if (len <= 0)
- goto skip;
- if ((res = av_get_packet(pb, pkt, len)) < 0)
- return res;
- }
- pkt->pos = pos;
- pkt->stream_index = st->index;
- return pkt->size;
- }
- }
- } else if (tag == TAG_JPEG2) {
- for (i=0; i<s->nb_streams; i++) {
- st = s->streams[i];
- if (st->codec->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)
- break;
- }
- if (i == s->nb_streams) {
- vst = avformat_new_stream(s, NULL);
- if (!vst)
- 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;
- avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
- st = vst;
- }
- avio_rl16(pb); /* BITMAP_ID */
- len -= 2;
- if (len < 4)
- goto skip;
- if ((res = av_new_packet(pkt, len)) < 0)
- return res;
- if (avio_read(pb, pkt->data, 4) != 4) {
- av_free_packet(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;
- memset(pkt->data+pkt->size, 0, 4);
- res = avio_read(pb, pkt->data, pkt->size);
- } else {
- res = avio_read(pb, pkt->data + 4, pkt->size - 4);
- if (res >= 0)
- res += 4;
- }
- if (res != pkt->size) {
- if (res < 0) {
- av_free_packet(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);
- }
-}
-
-#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)"),
- .priv_data_size = sizeof(SWFContext),
- .read_probe = swf_probe,
- .read_header = swf_read_header,
- .read_packet = swf_read_packet,
-#if CONFIG_ZLIB
- .read_close = swf_read_close,
-#endif
-};
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