mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 13413 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Baptiste Coudurier
17 years ago
parent
ba26712b5c
commit
85a6b01da4
4 changed files with 332 additions and 286 deletions
@ -0,0 +1,60 @@ |
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/*
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* FFM (ffserver live feed) common header |
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* Copyright (c) 2001 Fabrice Bellard. |
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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_FFM_H |
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#define FFMPEG_FFM_H |
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#include "avformat.h" |
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/* The FFM file is made of blocks of fixed size */ |
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#define FFM_HEADER_SIZE 14 |
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#define PACKET_ID 0x666d |
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/* each packet contains frames (which can span several packets */ |
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#define FRAME_HEADER_SIZE 8 |
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#define FLAG_KEY_FRAME 0x01 |
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typedef struct FFMStream { |
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int64_t pts; |
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} FFMStream; |
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enum { |
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READ_HEADER, |
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READ_DATA, |
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}; |
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typedef struct FFMContext { |
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/* only reading mode */ |
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offset_t write_index, file_size; |
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int read_state; |
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uint8_t header[FRAME_HEADER_SIZE]; |
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/* read and write */ |
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int first_packet; /* true if first packet, needed to set the discontinuity tag */ |
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int first_frame_in_packet; /* true if first frame in packet, needed to know if PTS information is valid */ |
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int packet_size; |
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int frame_offset; |
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int64_t pts; |
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uint8_t *packet_ptr, *packet_end; |
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uint8_t packet[FFM_PACKET_SIZE]; |
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} FFMContext; |
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#endif /* FFMPEG_FFM_H */ |
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@ -0,0 +1,267 @@ |
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/*
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* FFM (ffserver live feed) muxer |
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* Copyright (c) 2001 Fabrice Bellard. |
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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 "avformat.h" |
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#include "ffm.h" |
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#include <unistd.h> |
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/* disable pts hack for testing */ |
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int ffm_nopts = 0; |
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static void flush_packet(AVFormatContext *s) |
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{ |
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FFMContext *ffm = s->priv_data; |
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int fill_size, h; |
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ByteIOContext *pb = s->pb; |
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fill_size = ffm->packet_end - ffm->packet_ptr; |
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memset(ffm->packet_ptr, 0, fill_size); |
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if (url_ftell(pb) % ffm->packet_size) |
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av_abort(); |
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/* put header */ |
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put_be16(pb, PACKET_ID); |
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put_be16(pb, fill_size); |
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put_be64(pb, ffm->pts); |
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h = ffm->frame_offset; |
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if (ffm->first_packet) |
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h |= 0x8000; |
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put_be16(pb, h); |
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put_buffer(pb, ffm->packet, ffm->packet_end - ffm->packet); |
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put_flush_packet(pb); |
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/* prepare next packet */ |
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ffm->frame_offset = 0; /* no key frame */ |
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ffm->pts = 0; /* no pts */ |
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ffm->packet_ptr = ffm->packet; |
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ffm->first_packet = 0; |
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} |
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/* 'first' is true if first data of a frame */ |
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static void ffm_write_data(AVFormatContext *s, |
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const uint8_t *buf, int size, |
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int64_t pts, int first) |
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{ |
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FFMContext *ffm = s->priv_data; |
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int len; |
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if (first && ffm->frame_offset == 0) |
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ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE; |
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if (first && ffm->pts == 0) |
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ffm->pts = pts; |
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/* write as many packets as needed */ |
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while (size > 0) { |
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len = ffm->packet_end - ffm->packet_ptr; |
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if (len > size) |
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len = size; |
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memcpy(ffm->packet_ptr, buf, len); |
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ffm->packet_ptr += len; |
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buf += len; |
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size -= len; |
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if (ffm->packet_ptr >= ffm->packet_end) { |
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/* special case : no pts in packet : we leave the current one */ |
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if (ffm->pts == 0) |
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ffm->pts = pts; |
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flush_packet(s); |
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} |
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} |
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} |
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static int ffm_write_header(AVFormatContext *s) |
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{ |
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FFMContext *ffm = s->priv_data; |
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AVStream *st; |
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FFMStream *fst; |
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ByteIOContext *pb = s->pb; |
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AVCodecContext *codec; |
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int bit_rate, i; |
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ffm->packet_size = FFM_PACKET_SIZE; |
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/* header */ |
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put_le32(pb, MKTAG('F', 'F', 'M', '1')); |
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put_be32(pb, ffm->packet_size); |
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/* XXX: store write position in other file ? */ |
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put_be64(pb, ffm->packet_size); /* current write position */ |
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put_be32(pb, s->nb_streams); |
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bit_rate = 0; |
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for(i=0;i<s->nb_streams;i++) { |
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st = s->streams[i]; |
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bit_rate += st->codec->bit_rate; |
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} |
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put_be32(pb, bit_rate); |
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/* list of streams */ |
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for(i=0;i<s->nb_streams;i++) { |
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st = s->streams[i]; |
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fst = av_mallocz(sizeof(FFMStream)); |
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if (!fst) |
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goto fail; |
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av_set_pts_info(st, 64, 1, 1000000); |
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st->priv_data = fst; |
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codec = st->codec; |
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/* generic info */ |
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put_be32(pb, codec->codec_id); |
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put_byte(pb, codec->codec_type); |
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put_be32(pb, codec->bit_rate); |
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put_be32(pb, st->quality); |
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put_be32(pb, codec->flags); |
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put_be32(pb, codec->flags2); |
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put_be32(pb, codec->debug); |
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/* specific info */ |
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switch(codec->codec_type) { |
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case CODEC_TYPE_VIDEO: |
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put_be32(pb, codec->time_base.num); |
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put_be32(pb, codec->time_base.den); |
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put_be16(pb, codec->width); |
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put_be16(pb, codec->height); |
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put_be16(pb, codec->gop_size); |
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put_be32(pb, codec->pix_fmt); |
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put_byte(pb, codec->qmin); |
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put_byte(pb, codec->qmax); |
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put_byte(pb, codec->max_qdiff); |
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put_be16(pb, (int) (codec->qcompress * 10000.0)); |
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put_be16(pb, (int) (codec->qblur * 10000.0)); |
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put_be32(pb, codec->bit_rate_tolerance); |
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put_strz(pb, codec->rc_eq); |
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put_be32(pb, codec->rc_max_rate); |
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put_be32(pb, codec->rc_min_rate); |
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put_be32(pb, codec->rc_buffer_size); |
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put_be64(pb, av_dbl2int(codec->i_quant_factor)); |
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put_be64(pb, av_dbl2int(codec->b_quant_factor)); |
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put_be64(pb, av_dbl2int(codec->i_quant_offset)); |
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put_be64(pb, av_dbl2int(codec->b_quant_offset)); |
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put_be32(pb, codec->dct_algo); |
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put_be32(pb, codec->strict_std_compliance); |
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put_be32(pb, codec->max_b_frames); |
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put_be32(pb, codec->luma_elim_threshold); |
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put_be32(pb, codec->chroma_elim_threshold); |
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put_be32(pb, codec->mpeg_quant); |
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put_be32(pb, codec->intra_dc_precision); |
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put_be32(pb, codec->me_method); |
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put_be32(pb, codec->mb_decision); |
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put_be32(pb, codec->nsse_weight); |
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put_be32(pb, codec->frame_skip_cmp); |
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put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity)); |
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put_be32(pb, codec->codec_tag); |
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break; |
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case CODEC_TYPE_AUDIO: |
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put_be32(pb, codec->sample_rate); |
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put_le16(pb, codec->channels); |
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put_le16(pb, codec->frame_size); |
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break; |
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default: |
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return -1; |
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} |
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/* hack to have real time */ |
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if (ffm_nopts) |
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fst->pts = 0; |
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else |
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fst->pts = av_gettime(); |
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} |
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/* flush until end of block reached */ |
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while ((url_ftell(pb) % ffm->packet_size) != 0) |
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put_byte(pb, 0); |
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put_flush_packet(pb); |
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/* init packet mux */ |
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ffm->packet_ptr = ffm->packet; |
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ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE; |
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assert(ffm->packet_end >= ffm->packet); |
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ffm->frame_offset = 0; |
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ffm->pts = 0; |
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ffm->first_packet = 1; |
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return 0; |
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fail: |
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for(i=0;i<s->nb_streams;i++) { |
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st = s->streams[i]; |
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av_freep(&st->priv_data); |
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} |
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return -1; |
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} |
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static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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AVStream *st = s->streams[pkt->stream_index]; |
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FFMStream *fst = st->priv_data; |
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int64_t pts; |
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uint8_t header[FRAME_HEADER_SIZE]; |
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pts = fst->pts; |
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/* packet size & key_frame */ |
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header[0] = pkt->stream_index; |
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header[1] = 0; |
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if (pkt->flags & PKT_FLAG_KEY) |
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header[1] |= FLAG_KEY_FRAME; |
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AV_WB24(header+2, pkt->size); |
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AV_WB24(header+5, pkt->duration); |
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ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1); |
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ffm_write_data(s, pkt->data, pkt->size, pts, 0); |
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fst->pts += pkt->duration; |
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return 0; |
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} |
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static int ffm_write_trailer(AVFormatContext *s) |
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{ |
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ByteIOContext *pb = s->pb; |
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FFMContext *ffm = s->priv_data; |
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/* flush packets */ |
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if (ffm->packet_ptr > ffm->packet) |
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flush_packet(s); |
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put_flush_packet(pb); |
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if (!url_is_streamed(pb)) { |
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int64_t size; |
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/* update the write offset */ |
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size = url_ftell(pb); |
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url_fseek(pb, 8, SEEK_SET); |
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put_be64(pb, size); |
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put_flush_packet(pb); |
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} |
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return 0; |
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} |
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AVOutputFormat ffm_muxer = { |
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"ffm", |
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"ffm format", |
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"", |
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"ffm", |
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sizeof(FFMContext), |
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/* not really used */ |
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CODEC_ID_MP2, |
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CODEC_ID_MPEG1VIDEO, |
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ffm_write_header, |
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ffm_write_packet, |
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ffm_write_trailer, |
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}; |
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