/*
* Flash Compatible Streaming Format demuxer
- * Copyright (c) 2000 Fabrice Bellard.
- * Copyright (c) 2003 Tinic Uro.
+ * Copyright (c) 2000 Fabrice Bellard
+ * Copyright (c) 2003 Tinic Uro
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "config.h"
+
+#if CONFIG_ZLIB
+#include <zlib.h>
+#endif
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/intreadwrite.h"
#include "swf.h"
-static int get_swf_tag(ByteIOContext *pb, int *len_ptr)
+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))
+ if (pb->eof_reached)
return -1;
- tag = get_le16(pb);
+ tag = avio_rl16(pb);
len = tag & 0x3f;
tag = tag >> 6;
if (len == 0x3f) {
- len = get_le32(pb);
+ len = avio_rl32(pb);
}
-// av_log(NULL, AV_LOG_DEBUG, "Tag: %d - Len: %d\n", tag, len);
*len_ptr = len;
return tag;
}
return 0;
}
-static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
+#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 != Z_OK && ret != Z_STREAM_END) {
+ av_log(s, AV_LOG_ERROR, "Inflate error: %d\n", ret);
+ return AVERROR_UNKNOWN;
+ }
+
+ 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;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int nbits, len, tag;
- tag = get_be32(pb) & 0xffffff00;
+ 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, "Compressed SWF 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);
+ return AVERROR(ENOMEM);
+ }
+ swf->zpb->seekable = 0;
+ pb = swf->zpb;
+#else
+ av_log(s, AV_LOG_ERROR, "missing zlib support, unable to open\n");
return AVERROR(EIO);
- }
- if (tag != MKBETAG('F', 'W', 'S', 0))
+#endif
+ } else if (tag != MKBETAG('F', 'W', 'S', 0))
return AVERROR(EIO);
- get_le32(pb);
/* skip rectangle size */
- nbits = get_byte(pb) >> 3;
+ nbits = avio_r8(pb) >> 3;
len = (4 * nbits - 3 + 7) / 8;
- url_fskip(pb, len);
- swf->frame_rate = get_le16(pb); /* 8.8 fixed */
- get_le16(pb); /* frame count */
+ 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;
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SWFContext *swf = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *vst = NULL, *ast = NULL, *st = 0;
- int tag, len, i, frame, v;
+ 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);
- if (tag == TAG_VIDEOSTREAM && !vst) {
- int ch_id = get_le16(pb);
- get_le16(pb);
- get_le16(pb);
- get_le16(pb);
- get_byte(pb);
+ 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->codecpar->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 = av_new_stream(s, ch_id);
+ vst = avformat_new_stream(s, NULL);
if (!vst)
return -1;
- vst->codec->codec_type = CODEC_TYPE_VIDEO;
- vst->codec->codec_id = codec_get_id(swf_codec_tags, get_byte(pb));
- av_set_pts_info(vst, 64, 256, swf->frame_rate);
- vst->codec->time_base = (AVRational){ 256, swf->frame_rate };
- len -= 10;
- } else if ((tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) && !ast) {
+ vst->id = ch_id;
+ vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ vst->codecpar->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 */
int sample_rate_code;
- get_byte(pb);
- v = get_byte(pb);
- swf->samples_per_frame = get_le16(pb);
- ast = av_new_stream(s, -1); /* -1 to avoid clash with video stream ch_id */
+
+ for (i=0; i<s->nb_streams; i++) {
+ st = s->streams[i];
+ if (st->codecpar->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 = avformat_new_stream(s, NULL);
if (!ast)
return -1;
- swf->audio_stream_index = ast->index;
- ast->codec->channels = 1 + (v&1);
- ast->codec->codec_type = CODEC_TYPE_AUDIO;
- ast->codec->codec_id = codec_get_id(swf_audio_codec_tags, (v>>4) & 15);
+ ast->id = -1; /* -1 to avoid clash with video stream ch_id */
+ if (v & 1) {
+ ast->codecpar->channels = 2;
+ ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
+ } else {
+ ast->codecpar->channels = 1;
+ ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
+ }
+ ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ ast->codecpar->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;
- if (!sample_rate_code)
- return AVERROR(EIO);
- ast->codec->sample_rate = 11025 << (sample_rate_code-1);
- av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
+ ast->codecpar->sample_rate = 44100 >> (3 - sample_rate_code);
+ avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
len -= 4;
} else if (tag == TAG_VIDEOFRAME) {
- int ch_id = get_le16(pb);
+ 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 == CODEC_TYPE_VIDEO && st->id == ch_id) {
- frame = get_le16(pb);
- av_get_packet(pb, pkt, len-2);
+ if (st->codecpar->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_STREAMBLOCK) {
- st = s->streams[swf->audio_stream_index];
- if (st->codec->codec_id == CODEC_ID_MP3) {
- url_fskip(pb, 4);
- av_get_packet(pb, pkt, len-4);
- } else { // ADPCM, PCM
- av_get_packet(pb, pkt, len);
+ for (i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
+ if (st->codecpar->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;
+ }
}
- 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->id == -2)
+ if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)
break;
}
if (i == s->nb_streams) {
- vst = av_new_stream(s, -2); /* -2 to avoid clash with video stream and audio stream */
+ vst = avformat_new_stream(s, NULL);
if (!vst)
return -1;
- vst->codec->codec_type = CODEC_TYPE_VIDEO;
- vst->codec->codec_id = CODEC_ID_MJPEG;
- av_set_pts_info(vst, 64, 256, swf->frame_rate);
- vst->codec->time_base = (AVRational){ 256, swf->frame_rate };
+ vst->id = -2; /* -2 to avoid clash with video stream and audio stream */
+ vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ vst->codecpar->codec_id = AV_CODEC_ID_MJPEG;
+ avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
st = vst;
}
- get_le16(pb); /* BITMAP_ID */
- av_new_packet(pkt, len-2);
- get_buffer(pb, pkt->data, 4);
+ avio_rl16(pb); /* BITMAP_ID */
+ len -= 2;
+ if (len < 4)
+ goto skip;
+ if ((res = av_new_packet(pkt, len)) < 0)
+ return res;
+ avio_read(pb, pkt->data, 4);
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;
- get_buffer(pb, pkt->data, pkt->size);
+ avio_read(pb, pkt->data, pkt->size);
} else {
- get_buffer(pb, pkt->data + 4, pkt->size - 4);
+ avio_read(pb, pkt->data + 4, pkt->size - 4);
}
+ pkt->pos = pos;
pkt->stream_index = st->index;
return pkt->size;
}
- url_fskip(pb, len);
+ skip:
+ 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 swf_demuxer = {
- "swf",
- NULL_IF_CONFIG_SMALL("Flash format"),
- sizeof(SWFContext),
- swf_probe,
- swf_read_header,
- swf_read_packet,
+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
};
projects / ffmpeg / blobdiff