mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 13203 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Baptiste Coudurier
17 years ago
parent
585dac65db
commit
3b35f4ab51
4 changed files with 310 additions and 261 deletions
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/*
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* Flash Compatible Streaming Format common header. |
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* Copyright (c) 2000 Fabrice Bellard. |
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* Copyright (c) 2003 Tinic Uro. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef FFMPEG_SWF_H |
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#define FFMPEG_SWF_H |
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#include "avformat.h" |
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#include "riff.h" /* for CodecTag */ |
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/* should have a generic way to indicate probable size */ |
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#define DUMMY_FILE_SIZE (100 * 1024 * 1024) |
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#define DUMMY_DURATION 600 /* in seconds */ |
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#define TAG_END 0 |
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#define TAG_SHOWFRAME 1 |
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#define TAG_DEFINESHAPE 2 |
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#define TAG_FREECHARACTER 3 |
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#define TAG_PLACEOBJECT 4 |
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#define TAG_REMOVEOBJECT 5 |
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#define TAG_STREAMHEAD 18 |
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#define TAG_STREAMBLOCK 19 |
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#define TAG_JPEG2 21 |
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#define TAG_PLACEOBJECT2 26 |
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#define TAG_STREAMHEAD2 45 |
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#define TAG_VIDEOSTREAM 60 |
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#define TAG_VIDEOFRAME 61 |
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#define TAG_FILEATTRIBUTES 69 |
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#define TAG_LONG 0x100 |
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/* flags for shape definition */ |
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#define FLAG_MOVETO 0x01 |
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#define FLAG_SETFILL0 0x02 |
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#define FLAG_SETFILL1 0x04 |
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#define AUDIO_FIFO_SIZE 65536 |
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/* character id used */ |
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#define BITMAP_ID 0 |
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#define VIDEO_ID 0 |
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#define SHAPE_ID 1 |
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#undef NDEBUG |
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#include <assert.h> |
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typedef struct { |
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int audio_stream_index; |
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offset_t duration_pos; |
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offset_t tag_pos; |
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int samples_per_frame; |
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int sound_samples; |
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int swf_frame_number; |
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int video_frame_number; |
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int frame_rate; |
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int tag; |
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uint8_t audio_fifo[AUDIO_FIFO_SIZE]; |
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int audio_in_pos; |
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int video_type; |
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int audio_type; |
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} SWFContext; |
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static const AVCodecTag swf_codec_tags[] = { |
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{CODEC_ID_FLV1, 0x02}, |
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{CODEC_ID_VP6F, 0x04}, |
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{0, 0}, |
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}; |
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static const AVCodecTag swf_audio_codec_tags[] = { |
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{CODEC_ID_PCM_S16LE, 0x00}, |
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{CODEC_ID_ADPCM_SWF, 0x01}, |
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{CODEC_ID_MP3, 0x02}, |
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{CODEC_ID_PCM_S16LE, 0x03}, |
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//{CODEC_ID_NELLYMOSER, 0x06},
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{0, 0}, |
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}; |
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#endif /* FFMPEG_SWF_H */ |
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@ -0,0 +1,206 @@ |
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/*
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* Flash Compatible Streaming Format |
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* Copyright (c) 2000 Fabrice Bellard. |
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* Copyright (c) 2003 Tinic Uro. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "swf.h" |
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/*********************************************/ |
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/* Extract FLV encoded frame and MP3 from swf
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Note that the detection of the real frame |
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is inaccurate at this point as it can be |
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quite tricky to determine, you almost certainly |
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will get a bad audio/video sync */ |
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static int get_swf_tag(ByteIOContext *pb, int *len_ptr) |
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{ |
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int tag, len; |
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if (url_feof(pb)) |
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return -1; |
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tag = get_le16(pb); |
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len = tag & 0x3f; |
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tag = tag >> 6; |
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if (len == 0x3f) { |
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len = get_le32(pb); |
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} |
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// av_log(NULL, AV_LOG_DEBUG, "Tag: %d - Len: %d\n", tag, len);
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*len_ptr = len; |
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return tag; |
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} |
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static int swf_probe(AVProbeData *p) |
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{ |
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/* check file header */ |
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if ((p->buf[0] == 'F' || p->buf[0] == 'C') && p->buf[1] == 'W' && |
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p->buf[2] == 'S') |
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return AVPROBE_SCORE_MAX; |
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else |
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return 0; |
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} |
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static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap) |
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{ |
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SWFContext *swf = s->priv_data; |
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ByteIOContext *pb = s->pb; |
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int nbits, len, tag; |
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tag = get_be32(pb) & 0xffffff00; |
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if (tag == MKBETAG('C', 'W', 'S', 0)) { |
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av_log(s, AV_LOG_ERROR, "Compressed SWF format not supported\n"); |
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return AVERROR(EIO); |
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} |
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if (tag != MKBETAG('F', 'W', 'S', 0)) |
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return AVERROR(EIO); |
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get_le32(pb); |
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/* skip rectangle size */ |
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nbits = get_byte(pb) >> 3; |
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len = (4 * nbits - 3 + 7) / 8; |
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url_fskip(pb, len); |
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swf->frame_rate = get_le16(pb); /* 8.8 fixed */ |
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get_le16(pb); /* frame count */ |
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swf->samples_per_frame = 0; |
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s->ctx_flags |= AVFMTCTX_NOHEADER; |
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return 0; |
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} |
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static int swf_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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SWFContext *swf = s->priv_data; |
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ByteIOContext *pb = s->pb; |
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AVStream *vst = NULL, *ast = NULL, *st = 0; |
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int tag, len, i, frame, v; |
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for(;;) { |
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tag = get_swf_tag(pb, &len); |
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if (tag < 0) |
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return AVERROR(EIO); |
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if (tag == TAG_VIDEOSTREAM && !vst) { |
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int ch_id = get_le16(pb); |
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get_le16(pb); |
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get_le16(pb); |
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get_le16(pb); |
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get_byte(pb); |
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/* Check for FLV1 */ |
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vst = av_new_stream(s, ch_id); |
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if (!vst) |
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return -1; |
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vst->codec->codec_type = CODEC_TYPE_VIDEO; |
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vst->codec->codec_id = codec_get_id(swf_codec_tags, get_byte(pb)); |
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av_set_pts_info(vst, 64, 256, swf->frame_rate); |
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vst->codec->time_base = (AVRational){ 256, swf->frame_rate }; |
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len -= 10; |
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} else if ((tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) && !ast) { |
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/* streaming found */ |
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int sample_rate_code; |
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get_byte(pb); |
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v = get_byte(pb); |
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swf->samples_per_frame = get_le16(pb); |
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ast = av_new_stream(s, -1); /* -1 to avoid clash with video stream ch_id */ |
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if (!ast) |
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return -1; |
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swf->audio_stream_index = ast->index; |
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ast->codec->channels = 1 + (v&1); |
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ast->codec->codec_type = CODEC_TYPE_AUDIO; |
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ast->codec->codec_id = codec_get_id(swf_audio_codec_tags, (v>>4) & 15); |
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ast->need_parsing = AVSTREAM_PARSE_FULL; |
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sample_rate_code= (v>>2) & 3; |
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if (!sample_rate_code) |
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return AVERROR(EIO); |
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ast->codec->sample_rate = 11025 << (sample_rate_code-1); |
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av_set_pts_info(ast, 64, 1, ast->codec->sample_rate); |
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len -= 4; |
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} else if (tag == TAG_VIDEOFRAME) { |
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int ch_id = get_le16(pb); |
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len -= 2; |
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for(i=0; i<s->nb_streams; i++) { |
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st = s->streams[i]; |
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if (st->codec->codec_type == CODEC_TYPE_VIDEO && st->id == ch_id) { |
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frame = get_le16(pb); |
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av_get_packet(pb, pkt, len-2); |
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pkt->pts = frame; |
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pkt->stream_index = st->index; |
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return pkt->size; |
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} |
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} |
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} else if (tag == TAG_STREAMBLOCK) { |
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st = s->streams[swf->audio_stream_index]; |
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if (st->codec->codec_id == CODEC_ID_MP3) { |
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url_fskip(pb, 4); |
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av_get_packet(pb, pkt, len-4); |
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} else { // ADPCM, PCM
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av_get_packet(pb, pkt, len); |
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} |
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pkt->stream_index = st->index; |
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return pkt->size; |
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} else if (tag == TAG_JPEG2) { |
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for (i=0; i<s->nb_streams; i++) { |
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st = s->streams[i]; |
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if (st->id == -2) |
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break; |
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} |
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if (i == s->nb_streams) { |
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vst = av_new_stream(s, -2); /* -2 to avoid clash with video stream and audio stream */ |
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if (!vst) |
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return -1; |
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vst->codec->codec_type = CODEC_TYPE_VIDEO; |
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vst->codec->codec_id = CODEC_ID_MJPEG; |
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av_set_pts_info(vst, 64, 256, swf->frame_rate); |
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vst->codec->time_base = (AVRational){ 256, swf->frame_rate }; |
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st = vst; |
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} |
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get_le16(pb); /* BITMAP_ID */ |
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av_new_packet(pkt, len-2); |
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get_buffer(pb, pkt->data, 4); |
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if (AV_RB32(pkt->data) == 0xffd8ffd9 || |
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AV_RB32(pkt->data) == 0xffd9ffd8) { |
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/* old SWF files containing SOI/EOI as data start */ |
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/* files created by swink have reversed tag */ |
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pkt->size -= 4; |
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get_buffer(pb, pkt->data, pkt->size); |
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} else { |
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get_buffer(pb, pkt->data + 4, pkt->size - 4); |
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} |
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pkt->stream_index = st->index; |
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return pkt->size; |
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} |
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url_fskip(pb, len); |
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} |
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return 0; |
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} |
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static int swf_read_close(AVFormatContext *s) |
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{ |
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return 0; |
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} |
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AVInputFormat swf_demuxer = { |
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"swf", |
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"Flash format", |
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sizeof(SWFContext), |
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swf_probe, |
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swf_read_header, |
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swf_read_packet, |
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swf_read_close, |
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}; |
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