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flash video (flv) support patch by (Garrick Meeker <gmeeker at theoryllc dot com>)

Browse Source 
Originally committed as revision 2024 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Garrick Meeker 2003-07-09 23:10:59 +00:00 committed by Michael Niedermayer
parent b64dcbe325
commit d4f5d74a54
13 changed files with 885 additions and 29 deletions
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1
libavcodec/avcodec.c
View File

@ -39,6 +39,7 @@ static AVCodec* avcodec_find_by_fcc(uint32_t fcc)
{ CODEC_ID_MPEG1VIDEO, { MKTAG('P', 'I', 'M', '1'), 0 } },
{ CODEC_ID_AC3, { 0x2000, 0 } },
{ CODEC_ID_MP2, { 0x50, 0x55, 0 } },
{ CODEC_ID_FLV1, { MKTAG('F', 'L', 'V', '1'), 0 } },
{ CODEC_ID_NONE, {0}}
};

3
libavcodec/avcodec.h
View File

@ -41,6 +41,7 @@ enum CodecID {
CODEC_ID_WMV2,
CODEC_ID_H263P,
CODEC_ID_H263I,
CODEC_ID_FLV1,
CODEC_ID_SVQ1,
CODEC_ID_SVQ3,
CODEC_ID_DVVIDEO,
@ -1226,6 +1227,7 @@ extern AVCodec oggvorbis_encoder;
extern AVCodec mpeg1video_encoder;
extern AVCodec h263_encoder;
extern AVCodec h263p_encoder;
extern AVCodec flv_encoder;
extern AVCodec rv10_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec ljpeg_encoder;
@ -1249,6 +1251,7 @@ extern AVCodec wmv1_decoder;
extern AVCodec wmv2_decoder;
extern AVCodec mpeg_decoder;
extern AVCodec h263i_decoder;
extern AVCodec flv_decoder;
extern AVCodec rv10_decoder;
extern AVCodec svq1_decoder;
extern AVCodec svq3_decoder;

276
libavcodec/h263.c
View File

@ -50,11 +50,13 @@
#ifdef CONFIG_ENCODERS
static void h263_encode_block(MpegEncContext * s, DCTELEM * block,
int n);
int n);
static void h263_flv_encode_block(MpegEncContext * s, DCTELEM * block,
int n);
static void h263_encode_motion(MpegEncContext * s, int val, int fcode);
static void h263p_encode_umotion(MpegEncContext * s, int val);
static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block,
int n, int dc, uint8_t *scan_table,
int n, int dc, uint8_t *scan_table,
PutBitContext *dc_pb, PutBitContext *ac_pb);
#endif
@ -156,6 +158,48 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
align_put_bits(&s->pb);
if (s->h263_flv) {
put_bits(&s->pb, 17, 1);
put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */
put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->frame_rate_base) /
s->avctx->frame_rate) & 0xff); /* TemporalReference */
if (s->width == 352 && s->height == 288)
format = 2;
else if (s->width == 176 && s->height == 144)
format = 3;
else if (s->width == 128 && s->height == 96)
format = 4;
else if (s->width == 320 && s->height == 240)
format = 5;
else if (s->width == 160 && s->height == 120)
format = 6;
else if (s->width <= 255 && s->height <= 255)
format = 0; /* use 1 byte width & height */
else
format = 1; /* use 2 bytes width & height */
put_bits(&s->pb, 3, format); /* PictureSize */
if (format == 0) {
put_bits(&s->pb, 8, s->width);
put_bits(&s->pb, 8, s->height);
} else if (format == 1) {
put_bits(&s->pb, 16, s->width);
put_bits(&s->pb, 16, s->height);
}
put_bits(&s->pb, 2, s->pict_type == P_TYPE); /* PictureType */
put_bits(&s->pb, 1, 0); /* DeblockingFlag: off */
put_bits(&s->pb, 5, s->qscale); /* Quantizer */
put_bits(&s->pb, 1, 0); /* ExtraInformation */
if(s->h263_aic){
s->y_dc_scale_table=
s->c_dc_scale_table= h263_aic_dc_scale_table;
}else{
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
}
return;
}
/* Update the pointer to last GOB */
s->ptr_lastgob = pbBufPtr(&s->pb);
s->gob_number = 0;
@ -838,6 +882,7 @@ void h263_encode_mb(MpegEncContext * s,
int16_t pred_dc;
int16_t rec_intradc[6];
uint16_t *dc_ptr[6];
const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1);
const int dquant_code[5]= {1,0,9,2,3};
//printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
@ -851,6 +896,10 @@ void h263_encode_mb(MpegEncContext * s,
if ((cbp | motion_x | motion_y | s->dquant) == 0) {
/* skip macroblock */
put_bits(&s->pb, 1, 1);
if(interleaved_stats){
s->misc_bits++;
s->last_bits++;
}
return;
}
put_bits(&s->pb, 1, 0); /* mb coded */
@ -865,6 +914,10 @@ void h263_encode_mb(MpegEncContext * s,
if(s->dquant)
put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
if(interleaved_stats){
s->misc_bits+= get_bits_diff(s);
}
/* motion vectors: 16x16 mode only now */
h263_pred_motion(s, 0, &pred_x, &pred_y);
@ -879,6 +932,10 @@ void h263_encode_mb(MpegEncContext * s,
/* To prevent Start Code emulation */
put_bits(&s->pb,1,1);
}
if(interleaved_stats){
s->mv_bits+= get_bits_diff(s);
}
} else {
int li = s->h263_aic ? 0 : 1;
@ -946,11 +1003,18 @@ void h263_encode_mb(MpegEncContext * s,
put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
if(s->dquant)
put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
if(interleaved_stats){
s->misc_bits+= get_bits_diff(s);
}
}
for(i=0; i<6; i++) {
/* encode each block */
h263_encode_block(s, block[i], i);
if (s->h263_flv > 1)
h263_flv_encode_block(s, block[i], i);
else
h263_encode_block(s, block[i], i);
/* Update INTRADC for decoding */
if (s->h263_aic && s->mb_intra) {
@ -958,6 +1022,16 @@ void h263_encode_mb(MpegEncContext * s,
}
}
if(interleaved_stats){
if (!s->mb_intra) {
s->p_tex_bits+= get_bits_diff(s);
s->f_count++;
}else{
s->i_tex_bits+= get_bits_diff(s);
s->i_count++;
}
}
}
#endif
@ -1467,6 +1541,17 @@ void h263_encode_init(MpegEncContext *s)
s->max_qcoeff= 127;
break;
//Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later
case CODEC_ID_FLV1:
if (s->h263_flv > 1) {
s->min_qcoeff= -1023;
s->max_qcoeff= 1023;
} else {
s->min_qcoeff= -127;
s->max_qcoeff= 127;
}
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
break;
default: //nothing needed default table allready set in mpegvideo.c
s->min_qcoeff= -127;
s->max_qcoeff= 127;
@ -1547,6 +1632,83 @@ static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
}
}
}
/**
* encodes a 8x8 block.
* @param block the 8x8 block
* @param n block index (0-3 are luma, 4-5 are chroma)
*/
static void h263_flv_encode_block(MpegEncContext * s, DCTELEM * block, int n)
{
int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code;
RLTable *rl;
rl = &rl_inter;
if (s->mb_intra && !s->h263_aic) {
/* DC coef */
level = block[0];
/* 255 cannot be represented, so we clamp */
if (level > 254) {
level = 254;
block[0] = 254;
}
/* 0 cannot be represented also */
else if (level < 1) {
level = 1;
block[0] = 1;
}
if (level == 128) //FIXME check rv10
put_bits(&s->pb, 8, 0xff);
else
put_bits(&s->pb, 8, level & 0xff);
i = 1;
} else {
i = 0;
if (s->h263_aic && s->mb_intra)
rl = &rl_intra_aic;
}
/* AC coefs */
last_index = s->block_last_index[n];
last_non_zero = i - 1;
for (; i <= last_index; i++) {
j = s->intra_scantable.permutated[i];
level = block[j];
if (level) {
run = i - last_non_zero - 1;
last = (i == last_index);
sign = 0;
slevel = level;
if (level < 0) {
sign = 1;
level = -level;
}
code = get_rl_index(rl, last, run, level);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
if (code == rl->n) {
assert(slevel != 0);
if(slevel < 64 && slevel > -64) {
/* 7-bit level */
put_bits(&s->pb, 1, 0);
put_bits(&s->pb, 1, last);
put_bits(&s->pb, 6, run);
put_bits(&s->pb, 7, slevel & 0x7f);
} else {
/* 11-bit level */
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, 1, last);
put_bits(&s->pb, 6, run);
put_bits(&s->pb, 11, slevel & 0x7ff);
}
} else {
put_bits(&s->pb, 1, sign);
}
last_non_zero = i;
}
}
}
#endif
#ifdef CONFIG_ENCODERS
@ -3553,16 +3715,27 @@ static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
}
if (code == rl->n) {
/* escape */
last = get_bits1(&s->gb);
run = get_bits(&s->gb, 6);
level = (int8_t)get_bits(&s->gb, 8);
if(level == -128){
if (s->h263_rv10) {
/* XXX: should patch encoder too */
level = get_sbits(&s->gb, 12);
}else{
level = get_bits(&s->gb, 5);
level |= get_sbits(&s->gb, 6)<<5;
if (s->h263_flv > 1) {
int is11 = get_bits1(&s->gb);
last = get_bits1(&s->gb);
run = get_bits(&s->gb, 6);
if(is11){
level = (int8_t)get_sbits(&s->gb, 11);
} else {
level = (int8_t)get_sbits(&s->gb, 7);
}
} else {
last = get_bits1(&s->gb);
run = get_bits(&s->gb, 6);
level = (int8_t)get_bits(&s->gb, 8);
if(level == -128){
if (s->h263_rv10) {
/* XXX: should patch encoder too */
level = get_sbits(&s->gb, 12);
}else{
level = get_bits(&s->gb, 5);
level |= get_sbits(&s->gb, 6)<<5;
}
}
}
} else {
@ -4995,3 +5168,80 @@ int intel_h263_decode_picture_header(MpegEncContext *s)
return 0;
}
int flv_h263_decode_picture_header(MpegEncContext *s)
{
int format, width, height;
/* picture header */
if (get_bits_long(&s->gb, 17) != 1) {
fprintf(stderr, "Bad picture start code\n");
return -1;
}
format = get_bits(&s->gb, 5);
if (format != 0 && format != 1) {
fprintf(stderr, "Bad picture format\n");
return -1;
}
s->h263_flv = format+1;
s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
format = get_bits(&s->gb, 3);
switch (format) {
case 0:
width = get_bits(&s->gb, 8);
height = get_bits(&s->gb, 8);
break;
case 1:
width = get_bits(&s->gb, 16);
height = get_bits(&s->gb, 16);
break;
case 2:
width = 352;
height = 288;
break;
case 3:
width = 176;
height = 144;
break;
case 4:
width = 128;
height = 96;
break;
case 5:
width = 320;
height = 240;
break;
case 6:
width = 160;
height = 120;
break;
default:
width = height = 0;
break;
}
if ((width == 0) || (height == 0))
return -1;
s->width = width;
s->height = height;
s->pict_type = I_TYPE + get_bits(&s->gb, 2);
if (s->pict_type > P_TYPE)
s->pict_type = P_TYPE;
skip_bits1(&s->gb); /* deblocking flag */
s->qscale = get_bits(&s->gb, 5);
s->h263_plus = 0;
s->unrestricted_mv = 1;
s->h263_long_vectors = s->unrestricted_mv;
/* PEI */
while (get_bits1(&s->gb) != 0) {
skip_bits(&s->gb, 8);
}
s->f_code = 1;
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
return 0;
}

16
libavcodec/h263dec.c
View File

@ -96,6 +96,9 @@ int ff_h263_decode_init(AVCodecContext *avctx)
case CODEC_ID_H263I:
s->h263_intel = 1;
break;
case CODEC_ID_FLV1:
s->h263_flv = 1;
break;
default:
return -1;
}
@ -451,6 +454,8 @@ retry:
s->low_delay=1;
} else if (s->h263_intel) {
ret = intel_h263_decode_picture_header(s);
} else if (s->h263_flv) {
ret = flv_h263_decode_picture_header(s);
} else {
ret = h263_decode_picture_header(s);
}
@ -793,3 +798,14 @@ AVCodec h263i_decoder = {
mpeg4_decoptions,
};
AVCodec flv_decoder = {
"flv",
CODEC_TYPE_VIDEO,
CODEC_ID_FLV1,
sizeof(MpegEncContext),
ff_h263_decode_init,
NULL,
ff_h263_decode_end,
ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
};

34
libavcodec/imgconvert.c
View File

@ -593,19 +593,19 @@ static void yuv422_to_yuv420p(AVPicture *dst, AVPicture *src,
{
const uint8_t *p, *p1;
uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;
int x;
int w;
p1 = src->data[0];
lum1 = dst->data[0];
cb1 = dst->data[1];
cr1 = dst->data[2];
for(;height >= 2; height -= 2) {
for(;height >= 1; height -= 2) {
p = p1;
lum = lum1;
cb = cb1;
cr = cr1;
for(x=0;x<width;x+=2) {
for(w = width; w >= 2; w -= 2) {
lum[0] = p[0];
cb[0] = p[1];
lum[1] = p[2];
@ -615,18 +615,30 @@ static void yuv422_to_yuv420p(AVPicture *dst, AVPicture *src,
cb++;
cr++;
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
p = p1;
lum = lum1;
for(x=0;x<width;x+=2) {
if (w) {
lum[0] = p[0];
lum[1] = p[2];
p += 4;
lum += 2;
cb[0] = p[1];
cr[0] = p[3];
cb++;
cr++;
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
if (height>1) {
p = p1;
lum = lum1;
for(w = width; w >= 2; w -= 2) {
lum[0] = p[0];
lum[1] = p[2];
p += 4;
lum += 2;
}
if (w) {
lum[0] = p[0];
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
}
cb1 += dst->linesize[1];
cr1 += dst->linesize[2];
}

34
libavcodec/mpegvideo.c
View File

@ -670,6 +670,14 @@ int MPV_encode_init(AVCodecContext *avctx)
avctx->delay=0;
s->low_delay=1;
break;
case CODEC_ID_FLV1:
s->out_format = FMT_H263;
s->h263_flv = 2; /* format = 1; 11-bit codes */
s->unrestricted_mv = 1;
s->rtp_mode=0; /* don't allow GOB */
avctx->delay=0;
s->low_delay=1;
break;
case CODEC_ID_RV10:
s->out_format = FMT_H263;
s->h263_rv10 = 1;
@ -2997,6 +3005,7 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
ff_wmv2_encode_mb(s, s->block, motion_x, motion_y); break;
case CODEC_ID_H263:
case CODEC_ID_H263P:
case CODEC_ID_FLV1:
case CODEC_ID_RV10:
h263_encode_mb(s, s->block, motion_x, motion_y); break;
#endif
@ -3348,6 +3357,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
break;
case CODEC_ID_H263:
case CODEC_ID_H263P:
case CODEC_ID_FLV1:
ff_clean_h263_qscales(s);
break;
}
@ -3427,11 +3437,17 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->last_mv_dir = 0;
#ifdef CONFIG_RISKY
if (s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P)
switch(s->codec_id){
case CODEC_ID_H263:
case CODEC_ID_H263P:
case CODEC_ID_FLV1:
s->gob_index = ff_h263_get_gob_height(s);
if(s->codec_id==CODEC_ID_MPEG4 && s->partitioned_frame)
ff_mpeg4_init_partitions(s);
break;
case CODEC_ID_MPEG4:
if(s->partitioned_frame)
ff_mpeg4_init_partitions(s);
break;
}
#endif
s->resync_mb_x=0;
@ -4439,6 +4455,16 @@ AVCodec h263p_encoder = {
MPV_encode_end,
};
AVCodec flv_encoder = {
"flv",
CODEC_TYPE_VIDEO,
CODEC_ID_FLV1,
sizeof(MpegEncContext),
MPV_encode_init,
MPV_encode_picture,
MPV_encode_end,
};
AVCodec rv10_encoder = {
"rv10",
CODEC_TYPE_VIDEO,

2
libavcodec/mpegvideo.h
View File

@ -269,6 +269,7 @@ typedef struct MpegEncContext {
int h263_rv10; ///< use RV10 variation for H263
int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
int h263_intel; ///< use I263 intel h263 header
int h263_flv; ///< use flv h263 header
int codec_id; /* see CODEC_ID_xxx */
int fixed_qscale; ///< fixed qscale if non zero
@ -833,6 +834,7 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
int intel_h263_decode_picture_header(MpegEncContext *s);
int flv_h263_decode_picture_header(MpegEncContext *s);
int ff_h263_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int h263_get_picture_format(int width, int height);

1
libavcodec/utils.c
View File

@ -610,6 +610,7 @@ void avcodec_flush_buffers(AVCodecContext *avctx)
case CODEC_ID_WMV2:
case CODEC_ID_H263P:
case CODEC_ID_H263I:
case CODEC_ID_FLV1:
case CODEC_ID_SVQ1:
for(i=0; i<MAX_PICTURE_COUNT; i++){
if(s->picture[i].data[0] && ( s->picture[i].type == FF_BUFFER_TYPE_INTERNAL

2
libavformat/Makefile
View File

@ -14,7 +14,7 @@ PPOBJS=
# mux and demuxes
OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \
avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \
yuv4mpeg.o 4xm.o
yuv4mpeg.o 4xm.o flvenc.o flvdec.o
ifeq ($(CONFIG_RISKY),yes)
OBJS+= asf.o

2
libavformat/allformats.c
View File

@ -48,6 +48,8 @@ void av_register_all(void)
jpeg_init();
dv_init();
fourxm_init();
flvenc_init();
flvdec_init();
#ifdef AMR_NB
amr_init();

6
libavformat/avformat.h
View File

@ -304,6 +304,12 @@ int swf_init(void);
/* mov.c */
int mov_init(void);
/* flvenc.c */
int flvenc_init(void);
/* flvdec.c */
int flvdec_init(void);
/* jpeg.c */
int jpeg_init(void);

156
libavformat/flvdec.c Normal file
View File

@ -0,0 +1,156 @@
/*
* FLV encoder.
* Copyright (c) 2003 The FFmpeg Project.
*
* This library 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.
*
* This library 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
*/
#include "avformat.h"
unsigned int get_be24(ByteIOContext *s)
{
unsigned int val;
val = get_byte(s) << 16;
val |= get_byte(s) << 8;
val |= get_byte(s);
return val;
}
static int flv_probe(AVProbeData *p)
{
const uint8_t *d;
if (p->buf_size < 6)
return 0;
d = p->buf;
if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V') {
return 50;
}
return 0;
}
static int flv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int offset, flags;
AVStream *st;
av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
url_fskip(&s->pb, 4);
flags = get_byte(&s->pb);
if ((flags & 1)) {
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
st->codec.codec_type = CODEC_TYPE_VIDEO;
st->codec.codec_id = CODEC_ID_FLV1;
}
if ((flags & 4)) {
st = av_new_stream(s, 1);
if (!st)
return AVERROR_NOMEM;
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_id = CODEC_ID_MP3LAME;
}
offset = get_be32(&s->pb);
url_fseek(&s->pb, offset, SEEK_SET);
return 0;
}
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, i, type, size, pts, flags;
AVStream *st;
redo:
url_fskip(&s->pb, 4); /* size of previous packet */
type = get_byte(&s->pb);
size = get_be24(&s->pb);
pts = get_be24(&s->pb);
if (url_feof(&s->pb))
return -EIO;
url_fskip(&s->pb, 4); /* reserved */
flags = 0;
if (type == 8) {
flags = get_byte(&s->pb);
size--;
if ((flags >> 4) != 2) { /* 0: uncompressed 1: ADPCM 2: mp3 5: Nellymoser 8kHz mono 6: Nellymoser*/
goto skip;
}
} else if (type == 9) {
flags = get_byte(&s->pb);
size--;
if ((flags & 0xF) != 2) { /* 2: only format */
goto skip;
}
} else {
skip:
/* skip packet */
printf("skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
url_fskip(&s->pb, size);
goto redo;
}
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (st->id == ((type == 9) ? 0 : 1))
goto found;
}
goto skip;
found:
if (av_new_packet(pkt, size) < 0)
return -EIO;
ret = get_buffer(&s->pb, pkt->data, size);
if (ret <= 0) {
av_free_packet(pkt);
return -EIO;
}
/* note: we need to modify the packet size here to handle the last
packet */
pkt->size = ret;
pkt->pts = pts;
pkt->stream_index = st->index;
return ret;
}
static int flv_read_close(AVFormatContext *s)
{
return 0;
}
AVInputFormat flv_iformat = {
"flv",
"flv format",
0,
flv_probe,
flv_read_header,
flv_read_packet,
flv_read_close,
.extensions = "flv",
.value = CODEC_ID_FLV1,
};
int flvdec_init(void)
{
av_register_input_format(&flv_iformat);
return 0;
}

381
libavformat/flvenc.c Normal file
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@ -0,0 +1,381 @@
/*
* FLV encoder.
* Copyright (c) 2003 The FFmpeg Project.
*
* This library 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.
*
* This library 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
*/
#include "avformat.h"
#define VIDEO_FIFO_SIZE 512
typedef struct FLVFrame {
int type;
int timestamp;
int flags;
uint8_t *data;
int size;
struct FLVFrame *next;
} FLVFrame;
typedef struct FLVContext {
int hasAudio;
int hasVideo;
#ifdef CONFIG_MP3LAME
int audioTime;
int audioInPos;
int audioOutPos;
int audioSize;
int audioRate;
int initDelay;
int soundDelay;
uint8_t *audioFifo;
int64_t sampleCount;
#endif // CONFIG_MP3LAME
int64_t frameCount;
FLVFrame *frames;
} FLVContext;
#ifdef CONFIG_MP3LAME
#define AUDIO_FIFO_SIZE 65536
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 mp3info(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;
}
if ( !isPadded ) {
printf("Fatal error: mp3 data is not padded!\n");
exit(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 ) * bitsPerSlot);
return 1;
}
#endif // CONFIG_MP3LAME
static int flv_write_header(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
FLVContext *flv = s->priv_data;
av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
flv->hasAudio = 0;
flv->hasVideo = 0;
#ifdef CONFIG_MP3LAME
flv->audioTime = -1;
flv->audioFifo = av_malloc(AUDIO_FIFO_SIZE);
flv->audioInPos = 0;
flv->audioOutPos = 0;
flv->audioSize = 0;
flv->audioRate = 44100;
flv->initDelay = -1;
flv->soundDelay = 0;
#endif // CONFIG_MP3LAME
flv->frames = 0;
put_tag(pb,"FLV");
put_byte(pb,1);
put_byte(pb,0); // delayed write
put_be32(pb,9);
put_be32(pb,0);
return 0;
}
static void put_be24(ByteIOContext *pb, int value)
{
put_byte(pb, (value>>16) & 0xFF );
put_byte(pb, (value>> 8) & 0xFF );
put_byte(pb, (value>> 0) & 0xFF );
}
static void InsertSorted(FLVContext *flv, FLVFrame *frame)
{
if ( !flv->frames ) {
flv->frames = frame;
} else {
FLVFrame *trav = flv->frames;
FLVFrame *prev = 0;
for (;trav;) {
if ( trav->timestamp >= frame->timestamp ) {
frame->next = trav;
if ( prev ) {
prev->next = frame;
} else {
flv->frames = frame;
}
break;
}
prev = trav;
trav = trav->next;
}
if ( !trav ) {
prev->next = frame;
}
}
}
static void DumpFrame(ByteIOContext *pb, FLVFrame *frame)
{
put_byte(pb,frame->type); // message type
put_be24(pb,frame->size+1); // include flags
put_be24(pb,frame->timestamp); // time stamp
put_be32(pb,0); // reserved
put_byte(pb,frame->flags);
put_buffer(pb, frame->data, frame->size);
put_be32(pb,frame->size+1+11); // reserved
av_free(frame->data);
}
static void Dump(FLVContext *flv, ByteIOContext *pb, int count)
{
int c=0;
FLVFrame *trav = flv->frames;
FLVFrame *prev = 0;
for (;trav;c++) {
trav = trav->next;
}
trav = flv->frames;
for ( ; c >= count; c-- ) {
DumpFrame(pb,trav);
prev = trav;
trav = trav->next;
av_free(prev);
}
flv->frames = trav;
}
static int flv_write_trailer(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
FLVContext *flv = s->priv_data;
Dump(flv,pb,1);
int64_t file_size = url_ftell(pb);
int flags = 0;
flags |= flv->hasAudio ? 4 : 0;
flags |= flv->hasVideo ? 1 : 0;
url_fseek(pb, 4, SEEK_SET);
put_byte(pb,flags);
url_fseek(pb, file_size, SEEK_SET);
return 0;
}
static int flv_write_packet(AVFormatContext *s, int stream_index,
uint8_t *buf, int size, int timestamp)
{
ByteIOContext *pb = &s->pb;
AVCodecContext *enc = &s->streams[stream_index]->codec;
FLVContext *flv = s->priv_data;
if (enc->codec_type == CODEC_TYPE_VIDEO) {
FLVFrame *frame = av_malloc(sizeof(FLVFrame));
frame->next = 0;
frame->type = 9;
frame->flags = 2; // choose h263
frame->flags |= enc->coded_frame->key_frame ? 0x10 : 0x20; // add keyframe indicator
frame->timestamp = timestamp;
//frame->timestamp = ( ( flv->frameCount * (int64_t)FRAME_RATE_BASE * (int64_t)1000 ) / (int64_t)enc->frame_rate );
//printf("%08x %f %f\n",frame->timestamp,(double)enc->frame_rate/(double)FRAME_RATE_BASE,1000*(double)FRAME_RATE_BASE/(double)enc->frame_rate);
frame->size = size;
frame->data = av_malloc(size);
memcpy(frame->data,buf,size);
flv->hasVideo = 1;
InsertSorted(flv,frame);
flv->frameCount ++;
}
else if (enc->codec_type == CODEC_TYPE_AUDIO) {
#ifdef CONFIG_MP3LAME
if (enc->codec_id == CODEC_ID_MP3LAME ) {
int c=0;
for (;c<size;c++) {
flv->audioFifo[(flv->audioOutPos+c)%AUDIO_FIFO_SIZE] = buf[c];
}
flv->audioSize += size;
flv->audioOutPos += size;
flv->audioOutPos %= AUDIO_FIFO_SIZE;
if ( flv->initDelay == -1 ) {
flv->initDelay = timestamp;
}
if ( flv->audioTime == -1 ) {
flv->audioTime = timestamp;
// flv->audioTime = ( ( ( flv->sampleCount - enc->delay ) * 8000 ) / flv->audioRate ) - flv->initDelay - 250;
// if ( flv->audioTime < 0 ) {
// flv->audioTime = 0;
// }
}
}
for ( ; flv->audioSize >= 4 ; ) {
int mp3FrameSize = 0;
int mp3SampleRate = 0;
int mp3IsMono = 0;
int mp3SamplesPerFrame = 0;
if ( mp3info(&flv->audioFifo[flv->audioInPos],&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono) ) {
if ( flv->audioSize >= mp3FrameSize ) {
int soundFormat = 0x22;
int c=0;
FLVFrame *frame = av_malloc(sizeof(FLVFrame));
flv->audioRate = mp3SampleRate;
switch (mp3SampleRate) {
case 44100:
soundFormat |= 0x0C;
break;
case 22050:
soundFormat |= 0x08;
break;
case 11025:
soundFormat |= 0x04;
break;
}
if ( !mp3IsMono ) {
soundFormat |= 0x01;
}
frame->next = 0;
frame->type = 8;
frame->flags = soundFormat;
frame->timestamp = flv->audioTime;
frame->size = mp3FrameSize;
frame->data = av_malloc(mp3FrameSize);
for (;c<mp3FrameSize;c++) {
frame->data[c] = flv->audioFifo[(flv->audioInPos+c)%AUDIO_FIFO_SIZE];
}
flv->audioInPos += mp3FrameSize;
flv->audioSize -= mp3FrameSize;
flv->audioInPos %= AUDIO_FIFO_SIZE;
flv->sampleCount += mp3SamplesPerFrame;
// Reset audio for next round
flv->audioTime = -1;
// We got audio! Make sure we set this to the global flags on closure
flv->hasAudio = 1;
InsertSorted(flv,frame);
}
break;
}
flv->audioInPos ++;
flv->audioSize --;
flv->audioInPos %= AUDIO_FIFO_SIZE;
// no audio in here!
flv->audioTime = -1;
}
#endif
}
Dump(flv,pb,128);
put_flush_packet(pb);
return 0;
}
static AVOutputFormat flv_oformat = {
"flv",
"flv format",
"video/x-flashvideo",
"flv",
sizeof(FLVContext),
#ifdef CONFIG_MP3LAME
CODEC_ID_MP3LAME,
#else // CONFIG_MP3LAME
CODEC_ID_NONE,
#endif // CONFIG_MP3LAME
CODEC_ID_FLV1,
flv_write_header,
flv_write_packet,
flv_write_trailer,
};
int flvenc_init(void)
{
av_register_output_format(&flv_oformat);
return 0;
}