/*
* 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 library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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"
-
-/* should have a generic way to indicate probable size */
-#define DUMMY_FILE_SIZE (100 * 1024 * 1024)
-#define DUMMY_DURATION 600 /* in seconds */
-
-#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 45
-#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 SWF_VIDEO_CODEC_FLV1 0x02
-
-#define AUDIO_FIFO_SIZE 65536
-
-/* character id used */
-#define BITMAP_ID 0
-#define VIDEO_ID 0
-#define SHAPE_ID 1
-
-typedef struct SWFFrame_s {
- void *data;
- int size;
- struct SWFFrame_s *prev;
- struct SWFFrame_s *next;
-} SWFFrame;
-
-typedef struct {
-
- offset_t duration_pos;
- offset_t tag_pos;
-
- int samples_per_frame;
- int sound_samples;
- int video_samples;
- int skip_samples;
- int swf_frame_number;
- int video_frame_number;
- int ms_per_frame;
- int ch_id;
- int tag;
-
- uint8_t *audio_fifo;
- int audio_in_pos;
- int audio_out_pos;
- int audio_size;
- int video_type;
- int audio_type;
-
- SWFFrame *frame_head;
- SWFFrame *frame_tail;
-} SWFContext;
+#include "internal.h"
-static const int sSampleRates[3][4] = {
- {44100, 48000, 32000, 0},
- {22050, 24000, 16000, 0},
- {11025, 12000, 8000, 0},
+const AVCodecTag ff_swf_codec_tags[] = {
+ { AV_CODEC_ID_FLV1, 0x02 },
+ { AV_CODEC_ID_VP6F, 0x04 },
+ { AV_CODEC_ID_NONE, 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 )
-{
- uint8_t *dataTmp = (uint8_t *)data;
- uint32_t header = ( (uint32_t)dataTmp[0] << 24 ) | ( (uint32_t)dataTmp[1] << 16 ) | ( (uint32_t)dataTmp[2] << 8 ) | (uint32_t)dataTmp[3];
- 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_ENCODERS
-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;
- ByteIOContext *pb = &s->pb;
- AVCodecContext *enc, *audio_enc, *video_enc;
- PutBitContext p;
- uint8_t buf1[256];
- int i, width, height, rate, rate_base;
-
- swf = av_malloc(sizeof(SWFContext));
- if (!swf)
- return -1;
- s->priv_data = swf;
-
- swf->ch_id = -1;
- swf->audio_in_pos = 0;
- swf->audio_out_pos = 0;
- swf->audio_size = 0;
- swf->audio_fifo = av_malloc(AUDIO_FIFO_SIZE);
- swf->frame_head = 0;
- swf->frame_tail = 0;
- swf->sound_samples = 0;
- swf->video_samples = 0;
- swf->swf_frame_number = 0;
- swf->video_frame_number = 0;
- swf->skip_samples = 0;
-
- video_enc = NULL;
- audio_enc = NULL;
- for(i=0;i<s->nb_streams;i++) {
- enc = &s->streams[i]->codec;
- if (enc->codec_type == CODEC_TYPE_AUDIO)
- audio_enc = enc;
- else {
- if ( enc->codec_id == CODEC_ID_FLV1 || enc->codec_id == CODEC_ID_MJPEG ) {
- video_enc = enc;
- } else {
- fprintf(stderr, "SWF only supports 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->frame_rate;
- rate_base = video_enc->frame_rate_base;
- }
-
- 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_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_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_free(swf->audio_fifo);
- av_free(swf);
- 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 ) {
- return 0;
- }
-
- /* Store video data in queue */
- if ( enc->codec_type == CODEC_TYPE_VIDEO ) {
- SWFFrame *new_frame = av_malloc(sizeof(SWFFrame));
- new_frame->prev = 0;
- new_frame->next = swf->frame_head;
- new_frame->data = av_malloc(size);
- new_frame->size = size;
- memcpy(new_frame->data,buf,size);
- swf->frame_head = new_frame;
- if ( swf->frame_tail == 0 ) {
- swf->frame_tail = new_frame;
- }
- }
-
- 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;
- }
-
- /* compute audio/video drift */
- if ( enc->codec_type == CODEC_TYPE_VIDEO ) {
- swf->skip_samples = (int)( ( (double)(swf->swf_frame_number) * (double)enc->frame_rate_base * 44100. ) / (double)(enc->frame_rate) );
- swf->skip_samples -= swf->video_samples;
- }
- }
-
- /* check if we need to insert a padding frame */
- if (swf->skip_samples <= ( swf->samples_per_frame / 2 ) ) {
- /* no, it is time for a real frame, check if one is available */
- if ( swf->frame_tail ) {
- if ( 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, SWF_VIDEO_CODEC_FLV1);
- 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);
- }
-
- // write out pending frames
- for (; ( enc->frame_number - swf->video_frame_number ) > 0;) {
- /* 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, swf->frame_tail->data, swf->frame_tail->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, swf->frame_tail->data, swf->frame_tail->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 */
- }
-
- av_free(swf->frame_tail->data);
- swf->frame_tail = swf->frame_tail->prev;
- if ( swf->frame_tail ) {
- if ( swf->frame_tail->next ) {
- av_free(swf->frame_tail->next);
- }
- swf->frame_tail->next = 0;
- } else {
- swf->frame_head = 0;
- }
- 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; c<outSize; c++) {
- put_byte(pb,swf->audio_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 ) {
- return 0;
- }
-
- if (enc->codec_id == CODEC_ID_MP3 ) {
- for (c=0; c<size; c++) {
- swf->audio_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, int stream_index,
- const uint8_t *buf, int size, int64_t pts)
-{
- AVCodecContext *codec = &s->streams[stream_index]->codec;
- if (codec->codec_type == CODEC_TYPE_AUDIO)
- return swf_write_audio(s, codec, buf, size);
- else
- return swf_write_video(s, codec, buf, 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;i<s->nb_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);
- }
-
- av_free(swf->audio_fifo);
-
- return 0;
-}
-#endif //CONFIG_ENCODERS
-
-/*********************************************/
-/* 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);
- }
- *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[1] == 'W' &&
- p->buf[2] == 'S')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- SWFContext *swf = 0;
- ByteIOContext *pb = &s->pb;
- int nbits, len, frame_rate, tag, v;
- offset_t firstTagOff;
- AVStream *ast = 0;
- AVStream *vst = 0;
-
- swf = av_malloc(sizeof(SWFContext));
- if (!swf)
- return -1;
- s->priv_data = swf;
-
- if ((get_be32(pb) & 0xffffff00) != MKBETAG('F', 'W', 'S', 0))
- return -EIO;
- 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 */
-
- av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
-
- /* 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;
- swf->ch_id = -1;
-
- firstTagOff = url_ftell(pb);
- for(;;) {
- tag = get_swf_tag(pb, &len);
- if (tag < 0) {
- if ( ast || vst ) {
- if ( vst && ast ) {
- vst->codec.frame_rate = ast->codec.sample_rate / swf->samples_per_frame;
- vst->codec.frame_rate_base = 1;
- }
- break;
- }
- fprintf(stderr, "No media found in SWF\n");
- return -EIO;
- }
- if ( tag == TAG_VIDEOSTREAM && !vst) {
- swf->ch_id = get_le16(pb);
- get_le16(pb);
- get_le16(pb);
- get_le16(pb);
- get_byte(pb);
- /* Check for FLV1 */
- if ( get_byte(pb) == SWF_VIDEO_CODEC_FLV1 ) {
- vst = av_new_stream(s, 0);
- vst->codec.codec_type = CODEC_TYPE_VIDEO;
- vst->codec.codec_id = CODEC_ID_FLV1;
- if ( swf->samples_per_frame ) {
- vst->codec.frame_rate = 1000. / swf->ms_per_frame;
- vst->codec.frame_rate_base = 1;
- }
- }
- } else if ( ( tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2 ) && !ast) {
- /* streaming found */
- get_byte(pb);
- v = get_byte(pb);
- swf->samples_per_frame = get_le16(pb);
- if (len!=4)
- url_fskip(pb,len-4);
- /* if mp3 streaming found, OK */
- if ((v & 0x20) != 0) {
- if ( tag == TAG_STREAMHEAD2 ) {
- get_le16(pb);
- }
- ast = av_new_stream(s, 1);
- if (!ast)
- return -ENOMEM;
-
- if (v & 0x01)
- ast->codec.channels = 2;
- else
- ast->codec.channels = 1;
-
- switch((v>> 2) & 0x03) {
- case 1:
- ast->codec.sample_rate = 11025;
- break;
- case 2:
- ast->codec.sample_rate = 22050;
- break;
- case 3:
- ast->codec.sample_rate = 44100;
- break;
- default:
- av_free(ast);
- return -EIO;
- }
- ast->codec.codec_type = CODEC_TYPE_AUDIO;
- ast->codec.codec_id = CODEC_ID_MP3;
- }
- } 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 -EIO;
- if (tag == TAG_VIDEOFRAME) {
- for( i=0; i<s->nb_streams; i++ ) {
- st = s->streams[i];
- if (st->id == 0) {
- if ( get_le16(pb) == swf->ch_id ) {
- frame = get_le16(pb);
- av_new_packet(pkt, len-4);
- pkt->pts = frame * swf->ms_per_frame;
- pkt->stream_index = st->index;
- get_buffer(pb, pkt->data, pkt->size);
- return pkt->size;
- } else {
- url_fskip(pb, len-2);
- continue;
- }
- }
- }
- url_fskip(pb, len);
- } else if (tag == TAG_STREAMBLOCK) {
- for( i=0; i<s->nb_streams; i++ ) {
- st = s->streams[i];
- if (st->id == 1) {
- av_new_packet(pkt, len);
- pkt->stream_index = st->index;
- get_buffer(pb, pkt->data, pkt->size);
- return pkt->size;
- }
- }
- url_fskip(pb, len);
- } else {
- url_fskip(pb, len);
- }
- }
- return 0;
-}
-
-static int swf_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-static AVInputFormat swf_iformat = {
- "swf",
- "Flash format",
- sizeof(SWFContext),
- swf_probe,
- swf_read_header,
- swf_read_packet,
- swf_read_close,
-};
-
-#ifdef CONFIG_ENCODERS
-static AVOutputFormat swf_oformat = {
- "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,
-};
-#endif //CONFIG_ENCODERS
-
-int swf_init(void)
-{
- av_register_input_format(&swf_iformat);
-#ifdef CONFIG_ENCODERS
- av_register_output_format(&swf_oformat);
-#endif //CONFIG_ENCODERS
- return 0;
-}
projects / ffmpeg / blobdiff