diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/ffm.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/ffm.c | 794 |
1 files changed, 0 insertions, 794 deletions
diff --git a/contrib/ffmpeg/libavformat/ffm.c b/contrib/ffmpeg/libavformat/ffm.c deleted file mode 100644 index a2970ae42..000000000 --- a/contrib/ffmpeg/libavformat/ffm.c +++ /dev/null @@ -1,794 +0,0 @@ -/* - * FFM (ffserver live feed) muxer and demuxer - * Copyright (c) 2001 Fabrice Bellard. - * - * This file is part of FFmpeg. - * - * FFmpeg 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, - * 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 - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "avformat.h" -#include <unistd.h> - -/* The FFM file is made of blocks of fixed size */ -#define FFM_HEADER_SIZE 14 -#define PACKET_ID 0x666d - -/* each packet contains frames (which can span several packets */ -#define FRAME_HEADER_SIZE 8 -#define FLAG_KEY_FRAME 0x01 - -typedef struct FFMStream { - int64_t pts; -} FFMStream; - -enum { - READ_HEADER, - READ_DATA, -}; - -typedef struct FFMContext { - /* only reading mode */ - offset_t write_index, file_size; - int read_state; - uint8_t header[FRAME_HEADER_SIZE]; - - /* read and write */ - int first_packet; /* true if first packet, needed to set the discontinuity tag */ - int first_frame_in_packet; /* true if first frame in packet, needed to know if PTS information is valid */ - int packet_size; - int frame_offset; - int64_t pts; - uint8_t *packet_ptr, *packet_end; - uint8_t packet[FFM_PACKET_SIZE]; -} FFMContext; - -static int64_t get_pts(AVFormatContext *s, offset_t pos); - -/* disable pts hack for testing */ -int ffm_nopts = 0; - -#ifdef CONFIG_MUXERS -static void flush_packet(AVFormatContext *s) -{ - FFMContext *ffm = s->priv_data; - int fill_size, h; - ByteIOContext *pb = &s->pb; - - fill_size = ffm->packet_end - ffm->packet_ptr; - memset(ffm->packet_ptr, 0, fill_size); - - if (url_ftell(pb) % ffm->packet_size) - av_abort(); - - /* put header */ - put_be16(pb, PACKET_ID); - put_be16(pb, fill_size); - put_be64(pb, ffm->pts); - h = ffm->frame_offset; - if (ffm->first_packet) - h |= 0x8000; - put_be16(pb, h); - put_buffer(pb, ffm->packet, ffm->packet_end - ffm->packet); - put_flush_packet(pb); - - /* prepare next packet */ - ffm->frame_offset = 0; /* no key frame */ - ffm->pts = 0; /* no pts */ - ffm->packet_ptr = ffm->packet; - ffm->first_packet = 0; -} - -/* 'first' is true if first data of a frame */ -static void ffm_write_data(AVFormatContext *s, - const uint8_t *buf, int size, - int64_t pts, int first) -{ - FFMContext *ffm = s->priv_data; - int len; - - if (first && ffm->frame_offset == 0) - ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE; - if (first && ffm->pts == 0) - ffm->pts = pts; - - /* write as many packets as needed */ - while (size > 0) { - len = ffm->packet_end - ffm->packet_ptr; - if (len > size) - len = size; - memcpy(ffm->packet_ptr, buf, len); - - ffm->packet_ptr += len; - buf += len; - size -= len; - if (ffm->packet_ptr >= ffm->packet_end) { - /* special case : no pts in packet : we leave the current one */ - if (ffm->pts == 0) - ffm->pts = pts; - - flush_packet(s); - } - } -} - -static int ffm_write_header(AVFormatContext *s) -{ - FFMContext *ffm = s->priv_data; - AVStream *st; - FFMStream *fst; - ByteIOContext *pb = &s->pb; - AVCodecContext *codec; - int bit_rate, i; - - ffm->packet_size = FFM_PACKET_SIZE; - - /* header */ - put_le32(pb, MKTAG('F', 'F', 'M', '1')); - put_be32(pb, ffm->packet_size); - /* XXX: store write position in other file ? */ - put_be64(pb, ffm->packet_size); /* current write position */ - - put_be32(pb, s->nb_streams); - bit_rate = 0; - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - bit_rate += st->codec->bit_rate; - } - put_be32(pb, bit_rate); - - /* list of streams */ - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - fst = av_mallocz(sizeof(FFMStream)); - if (!fst) - goto fail; - av_set_pts_info(st, 64, 1, 1000000); - st->priv_data = fst; - - codec = st->codec; - /* generic info */ - put_be32(pb, codec->codec_id); - put_byte(pb, codec->codec_type); - put_be32(pb, codec->bit_rate); - put_be32(pb, st->quality); - put_be32(pb, codec->flags); - put_be32(pb, codec->flags2); - put_be32(pb, codec->debug); - /* specific info */ - switch(codec->codec_type) { - case CODEC_TYPE_VIDEO: - put_be32(pb, codec->time_base.num); - put_be32(pb, codec->time_base.den); - put_be16(pb, codec->width); - put_be16(pb, codec->height); - put_be16(pb, codec->gop_size); - put_be32(pb, codec->pix_fmt); - put_byte(pb, codec->qmin); - put_byte(pb, codec->qmax); - put_byte(pb, codec->max_qdiff); - put_be16(pb, (int) (codec->qcompress * 10000.0)); - put_be16(pb, (int) (codec->qblur * 10000.0)); - put_be32(pb, codec->bit_rate_tolerance); - put_strz(pb, codec->rc_eq); - put_be32(pb, codec->rc_max_rate); - put_be32(pb, codec->rc_min_rate); - put_be32(pb, codec->rc_buffer_size); - put_be64(pb, av_dbl2int(codec->i_quant_factor)); - put_be64(pb, av_dbl2int(codec->b_quant_factor)); - put_be64(pb, av_dbl2int(codec->i_quant_offset)); - put_be64(pb, av_dbl2int(codec->b_quant_offset)); - put_be32(pb, codec->dct_algo); - put_be32(pb, codec->strict_std_compliance); - put_be32(pb, codec->max_b_frames); - put_be32(pb, codec->luma_elim_threshold); - put_be32(pb, codec->chroma_elim_threshold); - put_be32(pb, codec->mpeg_quant); - put_be32(pb, codec->intra_dc_precision); - put_be32(pb, codec->me_method); - put_be32(pb, codec->mb_decision); - put_be32(pb, codec->nsse_weight); - put_be32(pb, codec->frame_skip_cmp); - put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity)); - put_be32(pb, codec->codec_tag); - break; - case CODEC_TYPE_AUDIO: - put_be32(pb, codec->sample_rate); - put_le16(pb, codec->channels); - put_le16(pb, codec->frame_size); - break; - default: - return -1; - } - /* hack to have real time */ - if (ffm_nopts) - fst->pts = 0; - else - fst->pts = av_gettime(); - } - - /* flush until end of block reached */ - while ((url_ftell(pb) % ffm->packet_size) != 0) - put_byte(pb, 0); - - put_flush_packet(pb); - - /* init packet mux */ - ffm->packet_ptr = ffm->packet; - ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE; - assert(ffm->packet_end >= ffm->packet); - ffm->frame_offset = 0; - ffm->pts = 0; - ffm->first_packet = 1; - - return 0; - fail: - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - av_freep(&st->priv_data); - } - return -1; -} - -static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVStream *st = s->streams[pkt->stream_index]; - FFMStream *fst = st->priv_data; - int64_t pts; - uint8_t header[FRAME_HEADER_SIZE]; - int duration; - int size= pkt->size; - - //XXX/FIXME use duration from pkt - if (st->codec->codec_type == CODEC_TYPE_AUDIO) { - duration = ((float)st->codec->frame_size / st->codec->sample_rate * 1000000.0); - } else { - duration = (1000000.0 * st->codec->time_base.num / (float)st->codec->time_base.den); - } - - pts = fst->pts; - /* packet size & key_frame */ - header[0] = pkt->stream_index; - header[1] = 0; - if (pkt->flags & PKT_FLAG_KEY) - header[1] |= FLAG_KEY_FRAME; - header[2] = (size >> 16) & 0xff; - header[3] = (size >> 8) & 0xff; - header[4] = size & 0xff; - header[5] = (duration >> 16) & 0xff; - header[6] = (duration >> 8) & 0xff; - header[7] = duration & 0xff; - ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1); - ffm_write_data(s, pkt->data, size, pts, 0); - - fst->pts += duration; - return 0; -} - -static int ffm_write_trailer(AVFormatContext *s) -{ - ByteIOContext *pb = &s->pb; - FFMContext *ffm = s->priv_data; - - /* flush packets */ - if (ffm->packet_ptr > ffm->packet) - flush_packet(s); - - put_flush_packet(pb); - - if (!url_is_streamed(pb)) { - int64_t size; - /* update the write offset */ - size = url_ftell(pb); - url_fseek(pb, 8, SEEK_SET); - put_be64(pb, size); - put_flush_packet(pb); - } - - return 0; -} -#endif //CONFIG_MUXERS - -/* ffm demux */ - -static int ffm_is_avail_data(AVFormatContext *s, int size) -{ - FFMContext *ffm = s->priv_data; - offset_t pos, avail_size; - int len; - - len = ffm->packet_end - ffm->packet_ptr; - if (!ffm_nopts) { - /* XXX: I don't understand this test, so I disabled it for testing */ - if (size <= len) - return 1; - } - pos = url_ftell(&s->pb); - if (pos == ffm->write_index) { - /* exactly at the end of stream */ - return 0; - } else if (pos < ffm->write_index) { - avail_size = ffm->write_index - pos; - } else { - avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE); - } - avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len; - if (size <= avail_size) - return 1; - else - return 0; -} - -/* first is true if we read the frame header */ -static int ffm_read_data(AVFormatContext *s, - uint8_t *buf, int size, int first) -{ - FFMContext *ffm = s->priv_data; - ByteIOContext *pb = &s->pb; - int len, fill_size, size1, frame_offset; - - size1 = size; - while (size > 0) { - redo: - len = ffm->packet_end - ffm->packet_ptr; - if (len > size) - len = size; - if (len == 0) { - if (url_ftell(pb) == ffm->file_size) - url_fseek(pb, ffm->packet_size, SEEK_SET); - retry_read: - get_be16(pb); /* PACKET_ID */ - fill_size = get_be16(pb); - ffm->pts = get_be64(pb); - ffm->first_frame_in_packet = 1; - frame_offset = get_be16(pb); - get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE); - ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size); - if (ffm->packet_end < ffm->packet) - return -1; - /* if first packet or resynchronization packet, we must - handle it specifically */ - if (ffm->first_packet || (frame_offset & 0x8000)) { - if (!frame_offset) { - /* This packet has no frame headers in it */ - if (url_ftell(pb) >= ffm->packet_size * 3) { - url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR); - goto retry_read; - } - /* This is bad, we cannot find a valid frame header */ - return 0; - } - ffm->first_packet = 0; - if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE) - return -1; - ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE; - if (!first) - break; - } else { - ffm->packet_ptr = ffm->packet; - } - goto redo; - } - memcpy(buf, ffm->packet_ptr, len); - buf += len; - ffm->packet_ptr += len; - size -= len; - first = 0; - } - return size1 - size; -} - - -static void adjust_write_index(AVFormatContext *s) -{ - FFMContext *ffm = s->priv_data; - ByteIOContext *pb = &s->pb; - int64_t pts; - //offset_t orig_write_index = ffm->write_index; - offset_t pos_min, pos_max; - int64_t pts_start; - offset_t ptr = url_ftell(pb); - - - pos_min = 0; - pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE; - - pts_start = get_pts(s, pos_min); - - pts = get_pts(s, pos_max); - - if (pts - 100000 > pts_start) - goto end; - - ffm->write_index = FFM_PACKET_SIZE; - - pts_start = get_pts(s, pos_min); - - pts = get_pts(s, pos_max); - - if (pts - 100000 <= pts_start) { - while (1) { - offset_t newpos; - int64_t newpts; - - newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE; - - if (newpos == pos_min) - break; - - newpts = get_pts(s, newpos); - - if (newpts - 100000 <= pts) { - pos_max = newpos; - pts = newpts; - } else { - pos_min = newpos; - } - } - ffm->write_index += pos_max; - } - - //printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.); - //printf("pts range %0.6f - %0.6f\n", get_pts(s, 0) / 1000000. , get_pts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. ); - - end: - url_fseek(pb, ptr, SEEK_SET); -} - - -static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap) -{ - FFMContext *ffm = s->priv_data; - AVStream *st; - FFMStream *fst; - ByteIOContext *pb = &s->pb; - AVCodecContext *codec; - int i, nb_streams; - uint32_t tag; - - /* header */ - tag = get_le32(pb); - if (tag != MKTAG('F', 'F', 'M', '1')) - goto fail; - ffm->packet_size = get_be32(pb); - if (ffm->packet_size != FFM_PACKET_SIZE) - goto fail; - ffm->write_index = get_be64(pb); - /* get also filesize */ - if (!url_is_streamed(pb)) { - ffm->file_size = url_fsize(pb); - adjust_write_index(s); - } else { - ffm->file_size = (UINT64_C(1) << 63) - 1; - } - - nb_streams = get_be32(pb); - get_be32(pb); /* total bitrate */ - /* read each stream */ - for(i=0;i<nb_streams;i++) { - char rc_eq_buf[128]; - - st = av_new_stream(s, 0); - if (!st) - goto fail; - fst = av_mallocz(sizeof(FFMStream)); - if (!fst) - goto fail; - s->streams[i] = st; - - av_set_pts_info(st, 64, 1, 1000000); - - st->priv_data = fst; - - codec = st->codec; - /* generic info */ - codec->codec_id = get_be32(pb); - codec->codec_type = get_byte(pb); /* codec_type */ - codec->bit_rate = get_be32(pb); - st->quality = get_be32(pb); - codec->flags = get_be32(pb); - codec->flags2 = get_be32(pb); - codec->debug = get_be32(pb); - /* specific info */ - switch(codec->codec_type) { - case CODEC_TYPE_VIDEO: - codec->time_base.num = get_be32(pb); - codec->time_base.den = get_be32(pb); - codec->width = get_be16(pb); - codec->height = get_be16(pb); - codec->gop_size = get_be16(pb); - codec->pix_fmt = get_be32(pb); - codec->qmin = get_byte(pb); - codec->qmax = get_byte(pb); - codec->max_qdiff = get_byte(pb); - codec->qcompress = get_be16(pb) / 10000.0; - codec->qblur = get_be16(pb) / 10000.0; - codec->bit_rate_tolerance = get_be32(pb); - codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf))); - codec->rc_max_rate = get_be32(pb); - codec->rc_min_rate = get_be32(pb); - codec->rc_buffer_size = get_be32(pb); - codec->i_quant_factor = av_int2dbl(get_be64(pb)); - codec->b_quant_factor = av_int2dbl(get_be64(pb)); - codec->i_quant_offset = av_int2dbl(get_be64(pb)); - codec->b_quant_offset = av_int2dbl(get_be64(pb)); - codec->dct_algo = get_be32(pb); - codec->strict_std_compliance = get_be32(pb); - codec->max_b_frames = get_be32(pb); - codec->luma_elim_threshold = get_be32(pb); - codec->chroma_elim_threshold = get_be32(pb); - codec->mpeg_quant = get_be32(pb); - codec->intra_dc_precision = get_be32(pb); - codec->me_method = get_be32(pb); - codec->mb_decision = get_be32(pb); - codec->nsse_weight = get_be32(pb); - codec->frame_skip_cmp = get_be32(pb); - codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb)); - codec->codec_tag = get_be32(pb); - break; - case CODEC_TYPE_AUDIO: - codec->sample_rate = get_be32(pb); - codec->channels = get_le16(pb); - codec->frame_size = get_le16(pb); - break; - default: - goto fail; - } - - } - - /* get until end of block reached */ - while ((url_ftell(pb) % ffm->packet_size) != 0) - get_byte(pb); - - /* init packet demux */ - ffm->packet_ptr = ffm->packet; - ffm->packet_end = ffm->packet; - ffm->frame_offset = 0; - ffm->pts = 0; - ffm->read_state = READ_HEADER; - ffm->first_packet = 1; - return 0; - fail: - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - if (st) { - av_freep(&st->priv_data); - av_free(st); - } - } - return -1; -} - -/* return < 0 if eof */ -static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - int size; - FFMContext *ffm = s->priv_data; - int duration; - - switch(ffm->read_state) { - case READ_HEADER: - if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) { - return AVERROR(EAGAIN); - } -#if 0 - printf("pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n", - url_ftell(&s->pb), s->pb.pos, ffm->write_index, ffm->file_size); -#endif - if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) != - FRAME_HEADER_SIZE) - return AVERROR(EAGAIN); -#if 0 - { - int i; - for(i=0;i<FRAME_HEADER_SIZE;i++) - printf("%02x ", ffm->header[i]); - printf("\n"); - } -#endif - ffm->read_state = READ_DATA; - /* fall thru */ - case READ_DATA: - size = (ffm->header[2] << 16) | (ffm->header[3] << 8) | ffm->header[4]; - if (!ffm_is_avail_data(s, size)) { - return AVERROR(EAGAIN); - } - - duration = (ffm->header[5] << 16) | (ffm->header[6] << 8) | ffm->header[7]; - - av_new_packet(pkt, size); - pkt->stream_index = ffm->header[0]; - pkt->pos = url_ftell(&s->pb); - if (ffm->header[1] & FLAG_KEY_FRAME) - pkt->flags |= PKT_FLAG_KEY; - - ffm->read_state = READ_HEADER; - if (ffm_read_data(s, pkt->data, size, 0) != size) { - /* bad case: desynchronized packet. we cancel all the packet loading */ - av_free_packet(pkt); - return AVERROR(EAGAIN); - } - if (ffm->first_frame_in_packet) - { - pkt->pts = ffm->pts; - ffm->first_frame_in_packet = 0; - } - pkt->duration = duration; - break; - } - return 0; -} - -//#define DEBUG_SEEK - -/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated - by the write position inside this function */ -static void ffm_seek1(AVFormatContext *s, offset_t pos1) -{ - FFMContext *ffm = s->priv_data; - ByteIOContext *pb = &s->pb; - offset_t pos; - - pos = pos1 + ffm->write_index; - if (pos >= ffm->file_size) - pos -= (ffm->file_size - FFM_PACKET_SIZE); -#ifdef DEBUG_SEEK - printf("seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos); -#endif - url_fseek(pb, pos, SEEK_SET); -} - -static int64_t get_pts(AVFormatContext *s, offset_t pos) -{ - ByteIOContext *pb = &s->pb; - int64_t pts; - - ffm_seek1(s, pos); - url_fskip(pb, 4); - pts = get_be64(pb); -#ifdef DEBUG_SEEK - printf("pts=%0.6f\n", pts / 1000000.0); -#endif - return pts; -} - -/* seek to a given time in the file. The file read pointer is - positionned at or before pts. XXX: the following code is quite - approximative */ -static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags) -{ - FFMContext *ffm = s->priv_data; - offset_t pos_min, pos_max, pos; - int64_t pts_min, pts_max, pts; - double pos1; - -#ifdef DEBUG_SEEK - printf("wanted_pts=%0.6f\n", wanted_pts / 1000000.0); -#endif - /* find the position using linear interpolation (better than - dichotomy in typical cases) */ - pos_min = 0; - pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE; - while (pos_min <= pos_max) { - pts_min = get_pts(s, pos_min); - pts_max = get_pts(s, pos_max); - /* linear interpolation */ - pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) / - (double)(pts_max - pts_min); - pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE; - if (pos <= pos_min) - pos = pos_min; - else if (pos >= pos_max) - pos = pos_max; - pts = get_pts(s, pos); - /* check if we are lucky */ - if (pts == wanted_pts) { - goto found; - } else if (pts > wanted_pts) { - pos_max = pos - FFM_PACKET_SIZE; - } else { - pos_min = pos + FFM_PACKET_SIZE; - } - } - pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; - if (pos > 0) - pos -= FFM_PACKET_SIZE; - found: - ffm_seek1(s, pos); - return 0; -} - -#ifdef CONFIG_FFSERVER -offset_t ffm_read_write_index(int fd) -{ - uint8_t buf[8]; - offset_t pos; - int i; - - lseek(fd, 8, SEEK_SET); - read(fd, buf, 8); - pos = 0; - for(i=0;i<8;i++) - pos |= (int64_t)buf[i] << (56 - i * 8); - return pos; -} - -void ffm_write_write_index(int fd, offset_t pos) -{ - uint8_t buf[8]; - int i; - - for(i=0;i<8;i++) - buf[i] = (pos >> (56 - i * 8)) & 0xff; - lseek(fd, 8, SEEK_SET); - write(fd, buf, 8); -} - -void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size) -{ - FFMContext *ffm = s->priv_data; - ffm->write_index = pos; - ffm->file_size = file_size; -} -#endif // CONFIG_FFSERVER - -static int ffm_read_close(AVFormatContext *s) -{ - AVStream *st; - int i; - - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - av_freep(&st->priv_data); - } - return 0; -} - -static int ffm_probe(AVProbeData *p) -{ - if (p->buf_size >= 4 && - p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' && - p->buf[3] == '1') - return AVPROBE_SCORE_MAX + 1; - return 0; -} - -#ifdef CONFIG_FFM_DEMUXER -AVInputFormat ffm_demuxer = { - "ffm", - "ffm format", - sizeof(FFMContext), - ffm_probe, - ffm_read_header, - ffm_read_packet, - ffm_read_close, - ffm_seek, -}; -#endif -#ifdef CONFIG_FFM_MUXER -AVOutputFormat ffm_muxer = { - "ffm", - "ffm format", - "", - "ffm", - sizeof(FFMContext), - /* not really used */ - CODEC_ID_MP2, - CODEC_ID_MPEG1VIDEO, - ffm_write_header, - ffm_write_packet, - ffm_write_trailer, -}; -#endif //CONFIG_FFM_MUXER |