X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fswf.c;h=e6adf69c02f14bb306ff600021777dec6cce925b;hb=90bc423212396e96a02edc1118982ab7f7766a63;hp=703aa6589c97e0bd3b9013f4f48ef5b0db01b4ae;hpb=950d94ad3b232d6e4ee1ad1a1f60364f8e0dfbda;p=ffmpeg diff --git a/libavformat/swf.c b/libavformat/swf.c index 703aa6589c9..e6adf69c02f 100644 --- a/libavformat/swf.c +++ b/libavformat/swf.c @@ -1,926 +1,29 @@ /* * Flash Compatible Streaming Format - * 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 "avformat.h" -#include "bitstream.h" -#include "riff.h" /* for CodecTag */ -/* should have a generic way to indicate probable size */ -#define DUMMY_FILE_SIZE (100 * 1024 * 1024) -#define DUMMY_DURATION 600 /* in seconds */ +#include "internal.h" -#define TAG_END 0 -#define TAG_SHOWFRAME 1 -#define TAG_DEFINESHAPE 2 -#define TAG_FREECHARACTER 3 -#define TAG_PLACEOBJECT 4 -#define TAG_REMOVEOBJECT 5 -#define TAG_STREAMHEAD 18 -#define TAG_STREAMBLOCK 19 -#define TAG_JPEG2 21 -#define TAG_PLACEOBJECT2 26 -#define TAG_STREAMHEAD2 45 -#define TAG_VIDEOSTREAM 60 -#define TAG_VIDEOFRAME 61 - -#define TAG_LONG 0x100 - -/* flags for shape definition */ -#define FLAG_MOVETO 0x01 -#define FLAG_SETFILL0 0x02 -#define FLAG_SETFILL1 0x04 - -#define AUDIO_FIFO_SIZE 65536 - -/* character id used */ -#define BITMAP_ID 0 -#define VIDEO_ID 0 -#define SHAPE_ID 1 - -#undef NDEBUG -#include - -typedef struct { - int audio_stream_index; - offset_t duration_pos; - offset_t tag_pos; - - int samples_per_frame; - int sound_samples; - int video_samples; - int swf_frame_number; - int video_frame_number; - int ms_per_frame; - int tag; - - uint8_t *audio_fifo; - int audio_in_pos; - int audio_out_pos; - int audio_size; - - int video_type; - int audio_type; -} SWFContext; - -static const AVCodecTag swf_codec_tags[] = { - {CODEC_ID_FLV1, 0x02}, - {CODEC_ID_VP6F, 0x04}, - {0, 0}, -}; - -static const int sSampleRates[3][4] = { - {44100, 48000, 32000, 0}, - {22050, 24000, 16000, 0}, - {11025, 12000, 8000, 0}, -}; - -static const int sBitRates[2][3][15] = { - { { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448}, - { 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384}, - { 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320} - }, - { { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256}, - { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}, - { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160} - }, -}; - -static const int sSamplesPerFrame[3][3] = -{ - { 384, 1152, 1152 }, - { 384, 1152, 576 }, - { 384, 1152, 576 } -}; - -static const int sBitsPerSlot[3] = { - 32, - 8, - 8 -}; - -static int swf_mp3_info(void *data, int *byteSize, int *samplesPerFrame, int *sampleRate, int *isMono ) -{ - uint32_t header = AV_RB32(data); - int layerID = 3 - ((header >> 17) & 0x03); - int bitRateID = ((header >> 12) & 0x0f); - int sampleRateID = ((header >> 10) & 0x03); - int bitRate = 0; - int bitsPerSlot = sBitsPerSlot[layerID]; - int isPadded = ((header >> 9) & 0x01); - - if ( (( header >> 21 ) & 0x7ff) != 0x7ff ) { - return 0; - } - - *isMono = ((header >> 6) & 0x03) == 0x03; - - if ( (header >> 19 ) & 0x01 ) { - *sampleRate = sSampleRates[0][sampleRateID]; - bitRate = sBitRates[0][layerID][bitRateID] * 1000; - *samplesPerFrame = sSamplesPerFrame[0][layerID]; - } else { - if ( (header >> 20) & 0x01 ) { - *sampleRate = sSampleRates[1][sampleRateID]; - bitRate = sBitRates[1][layerID][bitRateID] * 1000; - *samplesPerFrame = sSamplesPerFrame[1][layerID]; - } else { - *sampleRate = sSampleRates[2][sampleRateID]; - bitRate = sBitRates[1][layerID][bitRateID] * 1000; - *samplesPerFrame = sSamplesPerFrame[2][layerID]; - } - } - - *byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) ); - - return 1; -} - -#ifdef CONFIG_MUXERS -static void put_swf_tag(AVFormatContext *s, int tag) -{ - SWFContext *swf = s->priv_data; - ByteIOContext *pb = &s->pb; - - swf->tag_pos = url_ftell(pb); - swf->tag = tag; - /* reserve some room for the tag */ - if (tag & TAG_LONG) { - put_le16(pb, 0); - put_le32(pb, 0); - } else { - put_le16(pb, 0); - } -} - -static void put_swf_end_tag(AVFormatContext *s) -{ - SWFContext *swf = s->priv_data; - ByteIOContext *pb = &s->pb; - offset_t pos; - int tag_len, tag; - - pos = url_ftell(pb); - tag_len = pos - swf->tag_pos - 2; - tag = swf->tag; - url_fseek(pb, swf->tag_pos, SEEK_SET); - if (tag & TAG_LONG) { - tag &= ~TAG_LONG; - put_le16(pb, (tag << 6) | 0x3f); - put_le32(pb, tag_len - 4); - } else { - assert(tag_len < 0x3f); - put_le16(pb, (tag << 6) | tag_len); - } - url_fseek(pb, pos, SEEK_SET); -} - -static inline void max_nbits(int *nbits_ptr, int val) -{ - int n; - - if (val == 0) - return; - val = abs(val); - n = 1; - while (val != 0) { - n++; - val >>= 1; - } - if (n > *nbits_ptr) - *nbits_ptr = n; -} - -static void put_swf_rect(ByteIOContext *pb, - int xmin, int xmax, int ymin, int ymax) -{ - PutBitContext p; - uint8_t buf[256]; - int nbits, mask; - - init_put_bits(&p, buf, sizeof(buf)); - - nbits = 0; - max_nbits(&nbits, xmin); - max_nbits(&nbits, xmax); - max_nbits(&nbits, ymin); - max_nbits(&nbits, ymax); - mask = (1 << nbits) - 1; - - /* rectangle info */ - put_bits(&p, 5, nbits); - put_bits(&p, nbits, xmin & mask); - put_bits(&p, nbits, xmax & mask); - put_bits(&p, nbits, ymin & mask); - put_bits(&p, nbits, ymax & mask); - - flush_put_bits(&p); - put_buffer(pb, buf, pbBufPtr(&p) - p.buf); -} - -static void put_swf_line_edge(PutBitContext *pb, int dx, int dy) -{ - int nbits, mask; - - put_bits(pb, 1, 1); /* edge */ - put_bits(pb, 1, 1); /* line select */ - nbits = 2; - max_nbits(&nbits, dx); - max_nbits(&nbits, dy); - - mask = (1 << nbits) - 1; - put_bits(pb, 4, nbits - 2); /* 16 bits precision */ - if (dx == 0) { - put_bits(pb, 1, 0); - put_bits(pb, 1, 1); - put_bits(pb, nbits, dy & mask); - } else if (dy == 0) { - put_bits(pb, 1, 0); - put_bits(pb, 1, 0); - put_bits(pb, nbits, dx & mask); - } else { - put_bits(pb, 1, 1); - put_bits(pb, nbits, dx & mask); - put_bits(pb, nbits, dy & mask); - } -} - -#define FRAC_BITS 16 - -/* put matrix */ -static void put_swf_matrix(ByteIOContext *pb, - int a, int b, int c, int d, int tx, int ty) -{ - PutBitContext p; - uint8_t buf[256]; - int nbits; - - init_put_bits(&p, buf, sizeof(buf)); - - put_bits(&p, 1, 1); /* a, d present */ - nbits = 1; - max_nbits(&nbits, a); - max_nbits(&nbits, d); - put_bits(&p, 5, nbits); /* nb bits */ - put_bits(&p, nbits, a); - put_bits(&p, nbits, d); - - put_bits(&p, 1, 1); /* b, c present */ - nbits = 1; - max_nbits(&nbits, c); - max_nbits(&nbits, b); - put_bits(&p, 5, nbits); /* nb bits */ - put_bits(&p, nbits, c); - put_bits(&p, nbits, b); - - nbits = 1; - max_nbits(&nbits, tx); - max_nbits(&nbits, ty); - put_bits(&p, 5, nbits); /* nb bits */ - put_bits(&p, nbits, tx); - put_bits(&p, nbits, ty); - - flush_put_bits(&p); - put_buffer(pb, buf, pbBufPtr(&p) - p.buf); -} - -/* */ -static int swf_write_header(AVFormatContext *s) -{ - SWFContext *swf = s->priv_data; - ByteIOContext *pb = &s->pb; - AVCodecContext *enc, *audio_enc, *video_enc; - PutBitContext p; - uint8_t buf1[256]; - int i, width, height, rate, rate_base; - - swf->audio_in_pos = 0; - swf->audio_out_pos = 0; - swf->audio_size = 0; - swf->audio_fifo = av_malloc(AUDIO_FIFO_SIZE); - swf->sound_samples = 0; - swf->video_samples = 0; - swf->swf_frame_number = 0; - swf->video_frame_number = 0; - - video_enc = NULL; - audio_enc = NULL; - for(i=0;inb_streams;i++) { - enc = s->streams[i]->codec; - if (enc->codec_type == CODEC_TYPE_AUDIO) - audio_enc = enc; - else { - if ( enc->codec_id == CODEC_ID_VP6F || - enc->codec_id == CODEC_ID_FLV1 || - enc->codec_id == CODEC_ID_MJPEG ) { - video_enc = enc; - } else { - av_log(enc, AV_LOG_ERROR, "SWF only supports VP6, FLV1 and MJPEG\n"); - return -1; - } - } - } - - if (!video_enc) { - /* currenty, cannot work correctly if audio only */ - swf->video_type = 0; - width = 320; - height = 200; - rate = 10; - rate_base= 1; - } else { - swf->video_type = video_enc->codec_id; - width = video_enc->width; - height = video_enc->height; - rate = video_enc->time_base.den; - rate_base = video_enc->time_base.num; - } - - if (!audio_enc ) { - swf->audio_type = 0; - swf->samples_per_frame = ( 44100. * rate_base ) / rate; - } else { - swf->audio_type = audio_enc->codec_id; - swf->samples_per_frame = ( ( audio_enc->sample_rate ) * rate_base ) / rate; - } - - put_tag(pb, "FWS"); - if ( video_enc && video_enc->codec_id == CODEC_ID_VP6F ) { - put_byte(pb, 8); /* version (version 8 and above support VP6 codec) */ - } else if ( video_enc && video_enc->codec_id == CODEC_ID_FLV1 ) { - put_byte(pb, 6); /* version (version 6 and above support FLV1 codec) */ - } else { - put_byte(pb, 4); /* version (should use 4 for mpeg audio support) */ - } - 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 */ - - /* define a shape with the jpeg inside */ - if ( video_enc && (video_enc->codec_id == CODEC_ID_VP6F || - video_enc->codec_id == CODEC_ID_FLV1 )) { - } else if ( video_enc && 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 (audio_enc && audio_enc->codec_id == CODEC_ID_MP3 ) { - int v; - - /* start sound */ - put_swf_tag(s, TAG_STREAMHEAD2); - - v = 0; - switch(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 doesnt support that sample rate, choose from (44100, 22050, 11025)\n"); - av_free(swf->audio_fifo); - return -1; - } - v |= 0x02; /* 16 bit playback */ - if (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; -} - -static int swf_write_video(AVFormatContext *s, - AVCodecContext *enc, const uint8_t *buf, int size) -{ - SWFContext *swf = s->priv_data; - ByteIOContext *pb = &s->pb; - int c = 0; - int outSize = 0; - int outSamples = 0; - - /* 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 ( swf->audio_type ) { - /* Prescan audio data for this swf frame */ -retry_swf_audio_packet: - if ( ( swf->audio_size-outSize ) >= 4 ) { - int mp3FrameSize = 0; - int mp3SampleRate = 0; - int mp3IsMono = 0; - int mp3SamplesPerFrame = 0; - - /* copy out mp3 header from ring buffer */ - uint8_t header[4]; - for (c=0; c<4; c++) { - header[c] = swf->audio_fifo[(swf->audio_in_pos+outSize+c) % AUDIO_FIFO_SIZE]; - } - - if ( swf_mp3_info(header,&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono) ) { - if ( ( swf->audio_size-outSize ) >= mp3FrameSize ) { - outSize += mp3FrameSize; - outSamples += mp3SamplesPerFrame; - if ( ( swf->sound_samples + outSamples + swf->samples_per_frame ) < swf->video_samples ) { - goto retry_swf_audio_packet; - } - } - } else { - /* invalid mp3 data, skip forward - we need to do this since the Flash Player - does not like custom headers */ - swf->audio_in_pos ++; - swf->audio_size --; - swf->audio_in_pos %= AUDIO_FIFO_SIZE; - goto retry_swf_audio_packet; - } - } - - /* audio stream is behind video stream, bail */ - if ( ( swf->sound_samples + outSamples + swf->samples_per_frame ) < swf->video_samples ) { - return 0; - } - } - - if ( swf->video_type == CODEC_ID_VP6F || - swf->video_type == 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); - 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,swf->video_type)); - 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_byte(pb, 'v'); - put_byte(pb, 'i'); - put_byte(pb, 'd'); - put_byte(pb, 'e'); - put_byte(pb, 'o'); - 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 ( swf->video_type == 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_byte(pb, 0xff); - put_byte(pb, 0xd8); - put_byte(pb, 0xff); - put_byte(pb, 0xd9); - /* 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); - } else { - /* invalid codec */ - } - - swf->swf_frame_number ++; - - swf->video_samples += swf->samples_per_frame; - - /* streaming sound always should be placed just before showframe tags */ - if ( outSize > 0 ) { - put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG); - put_le16(pb, outSamples); - put_le16(pb, 0); - for (c=0; caudio_fifo[(swf->audio_in_pos+c) % AUDIO_FIFO_SIZE]); - } - put_swf_end_tag(s); - - /* update FIFO */ - swf->sound_samples += outSamples; - swf->audio_in_pos += outSize; - swf->audio_size -= outSize; - swf->audio_in_pos %= AUDIO_FIFO_SIZE; - } - - /* 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_audio(AVFormatContext *s, - AVCodecContext *enc, const uint8_t *buf, int size) -{ - SWFContext *swf = s->priv_data; - int c = 0; - - /* 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_MP3 ) { - for (c=0; caudio_fifo[(swf->audio_out_pos+c)%AUDIO_FIFO_SIZE] = buf[c]; - } - swf->audio_size += size; - swf->audio_out_pos += size; - swf->audio_out_pos %= AUDIO_FIFO_SIZE; - } - - /* if audio only stream make sure we add swf frames */ - if ( swf->video_type == 0 ) { - swf_write_video(s, enc, 0, 0); - } - - return 0; -} - -static int swf_write_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVCodecContext *codec = s->streams[pkt->stream_index]->codec; - if (codec->codec_type == CODEC_TYPE_AUDIO) - return swf_write_audio(s, codec, pkt->data, pkt->size); - else - return swf_write_video(s, codec, pkt->data, pkt->size); -} - -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;inb_streams;i++) { - enc = s->streams[i]->codec; - if (enc->codec_type == CODEC_TYPE_VIDEO) - video_enc = enc; - } - - 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, video_enc->frame_number); - url_fseek(pb, file_size, SEEK_SET); - } - - av_free(swf->audio_fifo); - - return 0; -} -#endif //CONFIG_MUXERS - -/*********************************************/ -/* Extract FLV encoded frame and MP3 from swf - Note that the detection of the real frame - is inaccurate at this point as it can be - quite tricky to determine, you almost certainly - will get a bad audio/video sync */ - -static int get_swf_tag(ByteIOContext *pb, int *len_ptr) -{ - int tag, len; - - if (url_feof(pb)) - return -1; - - tag = get_le16(pb); - len = tag & 0x3f; - tag = tag >> 6; - if (len == 0x3f) { - len = get_le32(pb); - } -// av_log(NULL, AV_LOG_DEBUG, "Tag: %d - Len: %d\n", tag, len); - *len_ptr = len; - return tag; -} - - -static int swf_probe(AVProbeData *p) -{ - /* check file header */ - if (p->buf_size <= 16) - return 0; - if ((p->buf[0] == 'F' || p->buf[0] == 'C') && p->buf[1] == 'W' && - p->buf[2] == 'S') - return AVPROBE_SCORE_MAX; - else - return 0; -} - -static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap) -{ - SWFContext *swf = s->priv_data; - ByteIOContext *pb = &s->pb; - int nbits, len, frame_rate, tag, v; - offset_t firstTagOff; - AVStream *ast = 0; - AVStream *vst = 0; - - tag = get_be32(pb) & 0xffffff00; - - if (tag == MKBETAG('C', 'W', 'S', 0)) - { - av_log(s, AV_LOG_ERROR, "Compressed SWF format not supported\n"); - return AVERROR_IO; - } - if (tag != MKBETAG('F', 'W', 'S', 0)) - return AVERROR_IO; - get_le32(pb); - /* skip rectangle size */ - nbits = get_byte(pb) >> 3; - len = (4 * nbits - 3 + 7) / 8; - url_fskip(pb, len); - frame_rate = get_le16(pb); - get_le16(pb); /* frame count */ - - /* The Flash Player converts 8.8 frame rates - to milliseconds internally. Do the same to get - a correct framerate */ - swf->ms_per_frame = ( 1000 * 256 ) / frame_rate; - swf->samples_per_frame = 0; - - firstTagOff = url_ftell(pb); - for(;;) { - tag = get_swf_tag(pb, &len); - if (tag < 0) { - if ( ast || vst ) { - if ( vst && ast ) { - vst->codec->time_base.den = ast->codec->sample_rate / swf->samples_per_frame; - vst->codec->time_base.num = 1; - } - break; - } - av_log(s, AV_LOG_ERROR, "No media found in SWF\n"); - return AVERROR_IO; - } - if ( tag == TAG_VIDEOSTREAM && !vst) { - int ch_id = get_le16(pb); - get_le16(pb); - get_le16(pb); - get_le16(pb); - get_byte(pb); - /* Check for FLV1 */ - vst = av_new_stream(s, ch_id); - av_set_pts_info(vst, 24, 1, 1000); /* 24 bit pts in ms */ - vst->codec->codec_type = CODEC_TYPE_VIDEO; - vst->codec->codec_id = codec_get_id(swf_codec_tags, get_byte(pb)); - if (swf->samples_per_frame) { - vst->codec->time_base.den = 1000. / swf->ms_per_frame; - vst->codec->time_base.num = 1; - } - } else if ( ( tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2 ) && !ast) { - /* 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 */ - av_set_pts_info(ast, 24, 1, 1000); /* 24 bit pts in ms */ - swf->audio_stream_index = ast->index; - ast->codec->channels = 1 + (v&1); - ast->codec->codec_type = CODEC_TYPE_AUDIO; - if (v & 0x20) - ast->codec->codec_id = CODEC_ID_MP3; - ast->need_parsing = 1; - sample_rate_code= (v>>2) & 3; - if (!sample_rate_code) - return AVERROR_IO; - ast->codec->sample_rate = 11025 << (sample_rate_code-1); - if (len > 4) - url_fskip(pb,len-4); - - } else if (tag == TAG_JPEG2 && !vst) { - vst = av_new_stream(s, -2); /* -2 to avoid clash with video stream and audio stream */ - av_set_pts_info(vst, 24, 1, 1000); /* 24 bit pts in ms */ - vst->codec->codec_type = CODEC_TYPE_VIDEO; - vst->codec->codec_id = CODEC_ID_MJPEG; - if (swf->samples_per_frame) { - vst->codec->time_base.den = 1000. / swf->ms_per_frame; - vst->codec->time_base.num = 1; - } - url_fskip(pb, len); - } else { - url_fskip(pb, len); - } - } - url_fseek(pb, firstTagOff, SEEK_SET); - - return 0; -} - -static int swf_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - SWFContext *swf = s->priv_data; - ByteIOContext *pb = &s->pb; - AVStream *st = 0; - int tag, len, i, frame; - - for(;;) { - tag = get_swf_tag(pb, &len); - if (tag < 0) - return AVERROR_IO; - if (tag == TAG_VIDEOFRAME) { - int ch_id = get_le16(pb); - len -= 2; - for( i=0; inb_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); - pkt->pts = frame * swf->ms_per_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); - pkt->stream_index = st->index; - return pkt->size; - } - } else if (tag == TAG_JPEG2) { - for (i=0; inb_streams; i++) { - st = s->streams[i]; - if (st->id == -2) { - get_le16(pb); /* BITMAP_ID */ - av_new_packet(pkt, len-2); - get_buffer(pb, pkt->data, 4); - if (AV_RB32(pkt->data) == 0xffd8ffd9) { - /* old SWF files containing SOI/EOI as data start */ - pkt->size -= 4; - get_buffer(pb, pkt->data, pkt->size); - } else { - get_buffer(pb, pkt->data + 4, pkt->size - 4); - } - pkt->stream_index = st->index; - return pkt->size; - } - } - } - url_fskip(pb, len); - } - return 0; -} - -static int swf_read_close(AVFormatContext *s) -{ - return 0; -} - -#ifdef CONFIG_SWF_DEMUXER -AVInputFormat swf_demuxer = { - "swf", - "Flash format", - sizeof(SWFContext), - swf_probe, - swf_read_header, - swf_read_packet, - swf_read_close, -}; -#endif -#ifdef CONFIG_SWF_MUXER -AVOutputFormat swf_muxer = { - "swf", - "Flash format", - "application/x-shockwave-flash", - "swf", - sizeof(SWFContext), - CODEC_ID_MP3, - CODEC_ID_FLV1, - swf_write_header, - swf_write_packet, - swf_write_trailer, +const AVCodecTag ff_swf_codec_tags[] = { + { AV_CODEC_ID_FLV1, 0x02 }, + { AV_CODEC_ID_VP6F, 0x04 }, + { AV_CODEC_ID_NONE, 0 }, }; -#endif