X-Git-Url: http://git.videolan.org/?p=ffmpeg.git;a=blobdiff_plain;f=libavformat%2Fffmdec.c;h=37a60a55e5675c876c7622da7c72697568e318fc;hp=706aa7d01989c8dfae924966d431a2843ce82c20;hb=9f5d3b13cf3be4d97515fac0542819060db69411;hpb=85a6b01da40eff44b17ee003c1aa30f608897220 diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c index 706aa7d019..37a60a55e5 100644 --- a/libavformat/ffmdec.c +++ b/libavformat/ffmdec.c @@ -21,9 +21,36 @@ #include "avformat.h" #include "ffm.h" +#ifdef CONFIG_FFSERVER #include -static int64_t get_pts(AVFormatContext *s, offset_t pos); +offset_t ffm_read_write_index(int fd) +{ + uint8_t buf[8]; + + lseek(fd, 8, SEEK_SET); + read(fd, buf, 8); + return AV_RB64(buf); +} + +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_is_avail_data(AVFormatContext *s, int size) { @@ -52,7 +79,7 @@ static int ffm_is_avail_data(AVFormatContext *s, int size) /* first is true if we read the frame header */ static int ffm_read_data(AVFormatContext *s, - uint8_t *buf, int size, int first) + uint8_t *buf, int size, int header) { FFMContext *ffm = s->priv_data; ByteIOContext *pb = s->pb; @@ -62,6 +89,8 @@ static int ffm_read_data(AVFormatContext *s, while (size > 0) { redo: len = ffm->packet_end - ffm->packet_ptr; + if (len < 0) + return -1; if (len > size) len = size; if (len == 0) { @@ -71,11 +100,10 @@ static int ffm_read_data(AVFormatContext *s, 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) + if (ffm->packet_end < ffm->packet || frame_offset < 0) return -1; /* if first packet or resynchronization packet, we must handle it specifically */ @@ -90,10 +118,10 @@ static int ffm_read_data(AVFormatContext *s, return 0; } ffm->first_packet = 0; - if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE) + if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE) return -1; ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE; - if (!first) + if (!header) break; } else { ffm->packet_ptr = ffm->packet; @@ -104,11 +132,43 @@ static int ffm_read_data(AVFormatContext *s, buf += len; ffm->packet_ptr += len; size -= len; - first = 0; + header = 0; } return size1 - size; } +//#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 + av_log(s, AV_LOG_DEBUG, "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 + av_log(s, AV_LOG_DEBUG, "pts=%0.6f\n", pts / 1000000.0); +#endif + return pts; +} static void adjust_write_index(AVFormatContext *s) { @@ -171,7 +231,6 @@ 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; @@ -202,15 +261,10 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap) 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); @@ -265,7 +319,13 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap) default: goto fail; } - + if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) { + codec->extradata_size = get_be32(pb); + codec->extradata = av_malloc(codec->extradata_size); + if (!codec->extradata) + return AVERROR(ENOMEM); + get_buffer(pb, codec->extradata, codec->extradata_size); + } } /* get until end of block reached */ @@ -284,7 +344,6 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap) for(i=0;inb_streams;i++) { st = s->streams[i]; if (st) { - av_freep(&st->priv_data); av_free(st); } } @@ -300,23 +359,19 @@ static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt) switch(ffm->read_state) { case READ_HEADER: - if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) { + if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) { 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 + dprintf(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n", + url_ftell(s->pb), s->pb->pos, ffm->write_index, ffm->file_size); if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) != FRAME_HEADER_SIZE) return AVERROR(EAGAIN); + if (ffm->header[1] & FLAG_DTS) + if (ffm_read_data(s, ffm->header+16, 4, 1) != 4) + return AVERROR(EAGAIN); #if 0 - { - int i; - for(i=0;iheader[i]); - printf("\n"); - } + av_hexdump_log(s, AV_LOG_DEBUG, ffm->header, FRAME_HEADER_SIZE); #endif ffm->read_state = READ_DATA; /* fall thru */ @@ -346,50 +401,17 @@ static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt) av_free_packet(pkt); return AVERROR(EAGAIN); } - if (ffm->first_frame_in_packet) - { - pkt->pts = ffm->pts; - ffm->first_frame_in_packet = 0; - } + pkt->pts = AV_RB64(ffm->header+8); + if (ffm->header[1] & FLAG_DTS) + pkt->dts = pkt->pts - AV_RB32(ffm->header+16); + else + pkt->dts = pkt->pts; 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 positioned at or before pts. XXX: the following code is quite approximative */ @@ -401,7 +423,7 @@ static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, in double pos1; #ifdef DEBUG_SEEK - printf("wanted_pts=%0.6f\n", wanted_pts / 1000000.0); + av_log(s, AV_LOG_DEBUG, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0); #endif /* find the position using linear interpolation (better than dichotomy in typical cases) */ @@ -433,47 +455,13 @@ static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, in 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]; - lseek(fd, 8, SEEK_SET); - read(fd, buf, 8); - return AV_RB64(buf); -} - -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; + /* reset read state */ + ffm->read_state = READ_HEADER; + ffm->packet_ptr = ffm->packet; + ffm->packet_end = ffm->packet; + ffm->first_packet = 1; - for(i=0;inb_streams;i++) { - st = s->streams[i]; - av_freep(&st->priv_data); - } return 0; } @@ -488,11 +476,11 @@ static int ffm_probe(AVProbeData *p) AVInputFormat ffm_demuxer = { "ffm", - "ffm format", + NULL_IF_CONFIG_SMALL("ffm format"), sizeof(FFMContext), ffm_probe, ffm_read_header, ffm_read_packet, - ffm_read_close, + NULL, ffm_seek, };