static int swf_write_trailer(AVFormatContext *s) { SWFContext *swf = s->priv_data; ByteIOContext *pb = s->pb; AVCodecContext *enc, *video_enc; int file_size, i; video_enc = NULL; for(i=0;i<s->nb_streams;i++) { enc = s->streams[i]->codec; if (enc->codec_type == CODEC_TYPE_VIDEO) video_enc = enc; else av_fifo_free(&swf->audio_fifo); } put_swf_tag(s, TAG_END); put_swf_end_tag(s); put_flush_packet(s->pb); /* patch file size and number of frames if not streamed */ if (!url_is_streamed(s->pb) && video_enc) { file_size = url_ftell(pb); url_fseek(pb, 4, SEEK_SET); put_le32(pb, file_size); url_fseek(pb, swf->duration_pos, SEEK_SET); put_le16(pb, swf->video_frame_number); url_fseek(pb, swf->vframes_pos, SEEK_SET); put_le16(pb, swf->video_frame_number); url_fseek(pb, file_size, SEEK_SET); } return 0; }
static int swf_write_trailer(AVFormatContext *s) { SWFContext *swf = s->priv_data; AVIOContext *pb = s->pb; AVCodecContext *enc, *video_enc; int file_size, i; video_enc = NULL; for(i=0;i<s->nb_streams;i++) { enc = s->streams[i]->codec; if (enc->codec_type == AVMEDIA_TYPE_VIDEO) video_enc = enc; else av_fifo_free(swf->audio_fifo); } put_swf_tag(s, TAG_END); put_swf_end_tag(s); avio_flush(s->pb); /* patch file size and number of frames if not streamed */ if (s->pb->seekable && video_enc) { file_size = avio_tell(pb); avio_seek(pb, 4, SEEK_SET); avio_wl32(pb, file_size); avio_seek(pb, swf->duration_pos, SEEK_SET); avio_wl16(pb, swf->video_frame_number); avio_seek(pb, swf->vframes_pos, SEEK_SET); avio_wl16(pb, swf->video_frame_number); avio_seek(pb, file_size, SEEK_SET); } return 0; }
static int swf_write_video(AVFormatContext *s, AVCodecContext *enc, const uint8_t *buf, int size) { SWFContext *swf = s->priv_data; ByteIOContext *pb = s->pb; /* Flash Player limit */ if (swf->swf_frame_number == 16000) av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n"); if (enc->codec_id == CODEC_ID_VP6F || enc->codec_id == CODEC_ID_FLV1) { if (swf->video_frame_number == 0) { /* create a new video object */ put_swf_tag(s, TAG_VIDEOSTREAM); put_le16(pb, VIDEO_ID); swf->vframes_pos = url_ftell(pb); put_le16(pb, 15000); /* hard flash player limit */ put_le16(pb, enc->width); put_le16(pb, enc->height); put_byte(pb, 0); put_byte(pb,codec_get_tag(swf_codec_tags,enc->codec_id)); put_swf_end_tag(s); /* place the video object for the first time */ put_swf_tag(s, TAG_PLACEOBJECT2); put_byte(pb, 0x36); put_le16(pb, 1); put_le16(pb, VIDEO_ID); put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0); put_le16(pb, swf->video_frame_number); put_tag(pb, "video"); put_byte(pb, 0x00); put_swf_end_tag(s); } else { /* mark the character for update */ put_swf_tag(s, TAG_PLACEOBJECT2); put_byte(pb, 0x11); put_le16(pb, 1); put_le16(pb, swf->video_frame_number); put_swf_end_tag(s); } /* set video frame data */ put_swf_tag(s, TAG_VIDEOFRAME | TAG_LONG); put_le16(pb, VIDEO_ID); put_le16(pb, swf->video_frame_number++); put_buffer(pb, buf, size); put_swf_end_tag(s); } else if (enc->codec_id == CODEC_ID_MJPEG) { if (swf->swf_frame_number > 0) { /* remove the shape */ put_swf_tag(s, TAG_REMOVEOBJECT); put_le16(pb, SHAPE_ID); /* shape ID */ put_le16(pb, 1); /* depth */ put_swf_end_tag(s); /* free the bitmap */ put_swf_tag(s, TAG_FREECHARACTER); put_le16(pb, BITMAP_ID); put_swf_end_tag(s); } put_swf_tag(s, TAG_JPEG2 | TAG_LONG); put_le16(pb, BITMAP_ID); /* ID of the image */ /* a dummy jpeg header seems to be required */ put_be32(pb, 0xffd8ffd9); /* write the jpeg image */ put_buffer(pb, buf, size); put_swf_end_tag(s); /* draw the shape */ put_swf_tag(s, TAG_PLACEOBJECT); put_le16(pb, SHAPE_ID); /* shape ID */ put_le16(pb, 1); /* depth */ put_swf_matrix(pb, 20 << FRAC_BITS, 0, 0, 20 << FRAC_BITS, 0, 0); put_swf_end_tag(s); } swf->swf_frame_number++; /* streaming sound always should be placed just before showframe tags */ if (swf->audio_enc && av_fifo_size(&swf->audio_fifo)) { int frame_size = av_fifo_size(&swf->audio_fifo); put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG); put_le16(pb, swf->sound_samples); put_le16(pb, 0); // seek samples av_fifo_generic_read(&swf->audio_fifo, frame_size, &put_buffer, pb); put_swf_end_tag(s); /* update FIFO */ swf->sound_samples = 0; } /* output the frame */ put_swf_tag(s, TAG_SHOWFRAME); put_swf_end_tag(s); put_flush_packet(s->pb); return 0; }
static int swf_write_header(AVFormatContext *s) { SWFContext *swf = s->priv_data; ByteIOContext *pb = s->pb; PutBitContext p; uint8_t buf1[256]; int i, width, height, rate, rate_base; int version; swf->sound_samples = 0; swf->swf_frame_number = 0; swf->video_frame_number = 0; for(i=0;i<s->nb_streams;i++) { AVCodecContext *enc = s->streams[i]->codec; if (enc->codec_type == CODEC_TYPE_AUDIO) { if (enc->codec_id == CODEC_ID_MP3) { if (!enc->frame_size) { av_log(s, AV_LOG_ERROR, "audio frame size not set\n"); return -1; } swf->audio_enc = enc; av_fifo_init(&swf->audio_fifo, AUDIO_FIFO_SIZE); } else { av_log(s, AV_LOG_ERROR, "SWF muxer only supports MP3\n"); return -1; } } else { if (enc->codec_id == CODEC_ID_VP6F || enc->codec_id == CODEC_ID_FLV1 || enc->codec_id == CODEC_ID_MJPEG) { swf->video_enc = enc; } else { av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n"); return -1; } } } if (!swf->video_enc) { /* currently, cannot work correctly if audio only */ width = 320; height = 200; rate = 10; rate_base= 1; } else { width = swf->video_enc->width; height = swf->video_enc->height; rate = swf->video_enc->time_base.den; rate_base = swf->video_enc->time_base.num; } if (!swf->audio_enc) swf->samples_per_frame = (44100. * rate_base) / rate; else swf->samples_per_frame = (swf->audio_enc->sample_rate * rate_base) / rate; put_tag(pb, "FWS"); if (!strcmp("avm2", s->oformat->name)) version = 9; else if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_VP6F) version = 8; /* version 8 and above support VP6 codec */ else if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_FLV1) version = 6; /* version 6 and above support FLV1 codec */ else version = 4; /* version 4 for mpeg audio support */ put_byte(pb, version); put_le32(pb, DUMMY_FILE_SIZE); /* dummy size (will be patched if not streamed) */ put_swf_rect(pb, 0, width * 20, 0, height * 20); put_le16(pb, (rate * 256) / rate_base); /* frame rate */ swf->duration_pos = url_ftell(pb); put_le16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */ /* avm2/swf v9 (also v8?) files require a file attribute tag */ if (version == 9) { put_swf_tag(s, TAG_FILEATTRIBUTES); put_le32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */ put_swf_end_tag(s); } /* define a shape with the jpeg inside */ if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_MJPEG) { put_swf_tag(s, TAG_DEFINESHAPE); put_le16(pb, SHAPE_ID); /* ID of shape */ /* bounding rectangle */ put_swf_rect(pb, 0, width, 0, height); /* style info */ put_byte(pb, 1); /* one fill style */ put_byte(pb, 0x41); /* clipped bitmap fill */ put_le16(pb, BITMAP_ID); /* bitmap ID */ /* position of the bitmap */ put_swf_matrix(pb, (int)(1.0 * (1 << FRAC_BITS)), 0, 0, (int)(1.0 * (1 << FRAC_BITS)), 0, 0); put_byte(pb, 0); /* no line style */ /* shape drawing */ init_put_bits(&p, buf1, sizeof(buf1)); put_bits(&p, 4, 1); /* one fill bit */ put_bits(&p, 4, 0); /* zero line bit */ put_bits(&p, 1, 0); /* not an edge */ put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0); put_bits(&p, 5, 1); /* nbits */ put_bits(&p, 1, 0); /* X */ put_bits(&p, 1, 0); /* Y */ put_bits(&p, 1, 1); /* set fill style 1 */ /* draw the rectangle ! */ put_swf_line_edge(&p, width, 0); put_swf_line_edge(&p, 0, height); put_swf_line_edge(&p, -width, 0); put_swf_line_edge(&p, 0, -height); /* end of shape */ put_bits(&p, 1, 0); /* not an edge */ put_bits(&p, 5, 0); flush_put_bits(&p); put_buffer(pb, buf1, pbBufPtr(&p) - p.buf); put_swf_end_tag(s); } if (swf->audio_enc && swf->audio_enc->codec_id == CODEC_ID_MP3) { int v = 0; /* start sound */ put_swf_tag(s, TAG_STREAMHEAD2); switch(swf->audio_enc->sample_rate) { case 11025: v |= 1 << 2; break; case 22050: v |= 2 << 2; break; case 44100: v |= 3 << 2; break; default: /* not supported */ av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n"); return -1; } v |= 0x02; /* 16 bit playback */ if (swf->audio_enc->channels == 2) v |= 0x01; /* stereo playback */ put_byte(s->pb, v); v |= 0x20; /* mp3 compressed */ put_byte(s->pb, v); put_le16(s->pb, swf->samples_per_frame); /* avg samples per frame */ put_le16(s->pb, 0); put_swf_end_tag(s); } put_flush_packet(s->pb); return 0; }