/* * "Real" compatible demuxer. * Copyright (c) 2000, 2001 Fabrice Bellard * * 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 2.1 of the License, or (at your option) any later version. * * 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/avstring.h" #include "libavutil/intreadwrite.h" #include "libavutil/dict.h" #include "avformat.h" #include "internal.h" #include "riff.h" #include "rm.h" #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC struct RMStream { AVPacket pkt; ///< place to store merged video frame / reordered audio data int videobufsize; ///< current assembled frame size int videobufpos; ///< position for the next slice in the video buffer int curpic_num; ///< picture number of current frame int cur_slice, slices; int64_t pktpos; ///< first slice position in file /// Audio descrambling matrix parameters int64_t audiotimestamp; ///< Audio packet timestamp int sub_packet_cnt; // Subpacket counter, used while reading int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container int audio_framesize; /// Audio frame size from container int sub_packet_lengths[16]; /// Length of each subpacket int32_t deint_id; ///< deinterleaver used in audio stream }; typedef struct { int nb_packets; int old_format; int current_stream; int remaining_len; int audio_stream_num; ///< Stream number for audio packets int audio_pkt_cnt; ///< Output packet counter } RMDemuxContext; static const unsigned char sipr_swaps[38][2] = { { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 }, { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 }, { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 }, { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 }, { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 }, { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 }, { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 }, { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 }, { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 }, { 67, 83 }, { 77, 80 } }; const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 }; static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len) { int i; char *q, r; q = buf; for(i=0;i<len;i++) { r = avio_r8(pb); if (i < buf_size - 1) *q++ = r; } if (buf_size > 0) *q = '\0'; } static void get_str8(AVIOContext *pb, char *buf, int buf_size) { get_strl(pb, buf, buf_size, avio_r8(pb)); } static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size) { if (size >= 1<<24) return -1; avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); if (!avctx->extradata) return AVERROR(ENOMEM); avctx->extradata_size = avio_read(pb, avctx->extradata, size); memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); if (avctx->extradata_size != size) return AVERROR(EIO); return 0; } static void rm_read_metadata(AVFormatContext *s, int wide) { char buf[1024]; int i; for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) { int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb); get_strl(s->pb, buf, sizeof(buf), len); av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0); } } RMStream *ff_rm_alloc_rmstream (void) { RMStream *rms = av_mallocz(sizeof(RMStream)); rms->curpic_num = -1; return rms; } void ff_rm_free_rmstream (RMStream *rms) { av_free_packet(&rms->pkt); } static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, int read_all) { char buf[256]; uint32_t version; int ret; /* ra type header */ version = avio_rb16(pb); /* version */ if (version == 3) { int header_size = avio_rb16(pb); int64_t startpos = avio_tell(pb); avio_skip(pb, 14); rm_read_metadata(s, 0); if ((startpos + header_size) >= avio_tell(pb) + 2) { // fourcc (should always be "lpcJ") avio_r8(pb); get_str8(pb, buf, sizeof(buf)); } // Skip extra header crap (this should never happen) if ((startpos + header_size) > avio_tell(pb)) avio_skip(pb, header_size + startpos - avio_tell(pb)); st->codec->sample_rate = 8000; st->codec->channels = 1; st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = CODEC_ID_RA_144; ast->deint_id = DEINT_ID_INT0; } else { int flavor, sub_packet_h, coded_framesize, sub_packet_size; int codecdata_length; /* old version (4) */ avio_skip(pb, 2); /* unused */ avio_rb32(pb); /* .ra4 */ avio_rb32(pb); /* data size */ avio_rb16(pb); /* version2 */ avio_rb32(pb); /* header size */ flavor= avio_rb16(pb); /* add codec info / flavor */ ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */ avio_rb32(pb); /* ??? */ avio_rb32(pb); /* ??? */ avio_rb32(pb); /* ??? */ ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */ st->codec->block_align= avio_rb16(pb); /* frame size */ ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */ avio_rb16(pb); /* ??? */ if (version == 5) { avio_rb16(pb); avio_rb16(pb); avio_rb16(pb); } st->codec->sample_rate = avio_rb16(pb); avio_rb32(pb); st->codec->channels = avio_rb16(pb); if (version == 5) { ast->deint_id = avio_rl32(pb); avio_read(pb, buf, 4); buf[4] = 0; } else { get_str8(pb, buf, sizeof(buf)); /* desc */ ast->deint_id = AV_RL32(buf); get_str8(pb, buf, sizeof(buf)); /* desc */ } st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_tag = AV_RL32(buf); st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags, st->codec->codec_tag); switch (st->codec->codec_id) { case CODEC_ID_AC3: st->need_parsing = AVSTREAM_PARSE_FULL; break; case CODEC_ID_RA_288: st->codec->extradata_size= 0; ast->audio_framesize = st->codec->block_align; st->codec->block_align = coded_framesize; break; case CODEC_ID_COOK: case CODEC_ID_ATRAC3: case CODEC_ID_SIPR: avio_rb16(pb); avio_r8(pb); if (version == 5) avio_r8(pb); codecdata_length = avio_rb32(pb); if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); return -1; } ast->audio_framesize = st->codec->block_align; if (st->codec->codec_id == CODEC_ID_SIPR) { if (flavor > 3) { av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n", flavor); return -1; } st->codec->block_align = ff_sipr_subpk_size[flavor]; } else { if(sub_packet_size <= 0){ av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n"); return -1; } st->codec->block_align = ast->sub_packet_size; } if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0) return ret; break; case CODEC_ID_AAC: avio_rb16(pb); avio_r8(pb); if (version == 5) avio_r8(pb); codecdata_length = avio_rb32(pb); if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); return -1; } if (codecdata_length >= 1) { avio_r8(pb); if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0) return ret; } break; default: av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name)); } if (ast->deint_id == DEINT_ID_INT4 || ast->deint_id == DEINT_ID_GENR || ast->deint_id == DEINT_ID_SIPR) { if (st->codec->block_align <= 0 || ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX || ast->audio_framesize * sub_packet_h < st->codec->block_align) return AVERROR_INVALIDDATA; if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0) return AVERROR(ENOMEM); } switch (ast->deint_id) { case DEINT_ID_INT4: if (ast->coded_framesize > ast->audio_framesize || ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize) return AVERROR_INVALIDDATA; break; case DEINT_ID_GENR: if (ast->sub_packet_size <= 0 || ast->sub_packet_size > ast->audio_framesize) return AVERROR_INVALIDDATA; break; case DEINT_ID_SIPR: case DEINT_ID_INT0: case DEINT_ID_VBRS: case DEINT_ID_VBRF: break; default: av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id); return AVERROR_INVALIDDATA; } if (read_all) { avio_r8(pb); avio_r8(pb); avio_r8(pb); rm_read_metadata(s, 0); } } return 0; } int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *rst, int codec_data_size) { unsigned int v; int size; int64_t codec_pos; int ret; avpriv_set_pts_info(st, 64, 1, 1000); codec_pos = avio_tell(pb); v = avio_rb32(pb); if (v == MKTAG(0xfd, 'a', 'r', '.')) { /* ra type header */ if (rm_read_audio_stream_info(s, pb, st, rst, 0)) return -1; } else { int fps; if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) { fail1: av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n"); goto skip; } st->codec->codec_tag = avio_rl32(pb); st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags, st->codec->codec_tag); // av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); if (st->codec->codec_id == CODEC_ID_NONE) goto fail1; st->codec->width = avio_rb16(pb); st->codec->height = avio_rb16(pb); avio_skip(pb, 2); // looks like bits per sample avio_skip(pb, 4); // always zero? st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS; fps = avio_rb32(pb); if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0) return ret; av_reduce(&st->r_frame_rate.den, &st->r_frame_rate.num, 0x10000, fps, (1 << 30) - 1); st->avg_frame_rate = st->r_frame_rate; } skip: /* skip codec info */ size = avio_tell(pb) - codec_pos; avio_skip(pb, codec_data_size - size); return 0; } /** this function assumes that the demuxer has already seeked to the start * of the INDX chunk, and will bail out if not. */ static int rm_read_index(AVFormatContext *s) { AVIOContext *pb = s->pb; unsigned int size, n_pkts, str_id, next_off, n, pos, pts; AVStream *st; do { if (avio_rl32(pb) != MKTAG('I','N','D','X')) return -1; size = avio_rb32(pb); if (size < 20) return -1; avio_skip(pb, 2); n_pkts = avio_rb32(pb); str_id = avio_rb16(pb); next_off = avio_rb32(pb); for (n = 0; n < s->nb_streams; n++) if (s->streams[n]->id == str_id) { st = s->streams[n]; break; } if (n == s->nb_streams) goto skip; for (n = 0; n < n_pkts; n++) { avio_skip(pb, 2); pts = avio_rb32(pb); pos = avio_rb32(pb); avio_skip(pb, 4); /* packet no. */ av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME); } skip: if (next_off && avio_tell(pb) != next_off && avio_seek(pb, next_off, SEEK_SET) < 0) return -1; } while (next_off); return 0; } static int rm_read_header_old(AVFormatContext *s) { RMDemuxContext *rm = s->priv_data; AVStream *st; rm->old_format = 1; st = avformat_new_stream(s, NULL); if (!st) return -1; st->priv_data = ff_rm_alloc_rmstream(); return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1); } static int rm_read_header(AVFormatContext *s) { RMDemuxContext *rm = s->priv_data; AVStream *st; AVIOContext *pb = s->pb; unsigned int tag; int tag_size; unsigned int start_time, duration; unsigned int data_off = 0, indx_off = 0; char buf[128]; int flags = 0; tag = avio_rl32(pb); if (tag == MKTAG('.', 'r', 'a', 0xfd)) { /* very old .ra format */ return rm_read_header_old(s); } else if (tag != MKTAG('.', 'R', 'M', 'F')) { return AVERROR(EIO); } avio_rb32(pb); /* header size */ avio_rb16(pb); avio_rb32(pb); avio_rb32(pb); /* number of headers */ for(;;) { if (pb->eof_reached) return -1; tag = avio_rl32(pb); tag_size = avio_rb32(pb); avio_rb16(pb); av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n", (tag ) & 0xff, (tag >> 8) & 0xff, (tag >> 16) & 0xff, (tag >> 24) & 0xff, tag, tag_size); if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) return -1; switch(tag) { case MKTAG('P', 'R', 'O', 'P'): /* file header */ avio_rb32(pb); /* max bit rate */ avio_rb32(pb); /* avg bit rate */ avio_rb32(pb); /* max packet size */ avio_rb32(pb); /* avg packet size */ avio_rb32(pb); /* nb packets */ avio_rb32(pb); /* duration */ avio_rb32(pb); /* preroll */ indx_off = avio_rb32(pb); /* index offset */ data_off = avio_rb32(pb); /* data offset */ avio_rb16(pb); /* nb streams */ flags = avio_rb16(pb); /* flags */ break; case MKTAG('C', 'O', 'N', 'T'): rm_read_metadata(s, 1); break; case MKTAG('M', 'D', 'P', 'R'): st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->id = avio_rb16(pb); avio_rb32(pb); /* max bit rate */ st->codec->bit_rate = avio_rb32(pb); /* bit rate */ avio_rb32(pb); /* max packet size */ avio_rb32(pb); /* avg packet size */ start_time = avio_rb32(pb); /* start time */ avio_rb32(pb); /* preroll */ duration = avio_rb32(pb); /* duration */ st->start_time = start_time; st->duration = duration; get_str8(pb, buf, sizeof(buf)); /* desc */ get_str8(pb, buf, sizeof(buf)); /* mimetype */ st->codec->codec_type = AVMEDIA_TYPE_DATA; st->priv_data = ff_rm_alloc_rmstream(); if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data, avio_rb32(pb)) < 0) return -1; break; case MKTAG('D', 'A', 'T', 'A'): goto header_end; default: /* unknown tag: skip it */ avio_skip(pb, tag_size - 10); break; } } header_end: rm->nb_packets = avio_rb32(pb); /* number of packets */ if (!rm->nb_packets && (flags & 4)) rm->nb_packets = 3600 * 25; avio_rb32(pb); /* next data header */ if (!data_off) data_off = avio_tell(pb) - 18; if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) && avio_seek(pb, indx_off, SEEK_SET) >= 0) { rm_read_index(s); avio_seek(pb, data_off + 18, SEEK_SET); } return 0; } static int get_num(AVIOContext *pb, int *len) { int n, n1; n = avio_rb16(pb); (*len)-=2; n &= 0x7FFF; if (n >= 0x4000) { return n - 0x4000; } else { n1 = avio_rb16(pb); (*len)-=2; return (n << 16) | n1; } } /* multiple of 20 bytes for ra144 (ugly) */ #define RAW_PACKET_SIZE 1000 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ RMDemuxContext *rm = s->priv_data; AVIOContext *pb = s->pb; AVStream *st; uint32_t state=0xFFFFFFFF; while(!pb->eof_reached){ int len, num, i; *pos= avio_tell(pb) - 3; if(rm->remaining_len > 0){ num= rm->current_stream; len= rm->remaining_len; *timestamp = AV_NOPTS_VALUE; *flags= 0; }else{ state= (state<<8) + avio_r8(pb); if(state == MKBETAG('I', 'N', 'D', 'X')){ int n_pkts, expected_len; len = avio_rb32(pb); avio_skip(pb, 2); n_pkts = avio_rb32(pb); expected_len = 20 + n_pkts * 14; if (len == 20) /* some files don't add index entries to chunk size... */ len = expected_len; else if (len != expected_len) av_log(s, AV_LOG_WARNING, "Index size %d (%d pkts) is wrong, should be %d.\n", len, n_pkts, expected_len); len -= 14; // we already read part of the index header if(len<0) continue; goto skip; } else if (state == MKBETAG('D','A','T','A')) { av_log(s, AV_LOG_WARNING, "DATA tag in middle of chunk, file may be broken.\n"); } if(state > (unsigned)0xFFFF || state <= 12) continue; len=state - 12; state= 0xFFFFFFFF; num = avio_rb16(pb); *timestamp = avio_rb32(pb); avio_r8(pb); /* reserved */ *flags = avio_r8(pb); /* flags */ } for(i=0;i<s->nb_streams;i++) { st = s->streams[i]; if (num == st->id) break; } if (i == s->nb_streams) { skip: /* skip packet if unknown number */ avio_skip(pb, len); rm->remaining_len = 0; continue; } *stream_index= i; return len; } return -1; } static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb, RMDemuxContext *rm, RMStream *vst, AVPacket *pkt, int len, int *pseq, int64_t *timestamp) { int hdr, seq, pic_num, len2, pos; int type; hdr = avio_r8(pb); len--; type = hdr >> 6; if(type != 3){ // not frame as a part of packet seq = avio_r8(pb); len--; } if(type != 1){ // not whole frame len2 = get_num(pb, &len); pos = get_num(pb, &len); pic_num = avio_r8(pb); len--; } if(len<0) return -1; rm->remaining_len = len; if(type&1){ // frame, not slice if(type == 3){ // frame as a part of packet len= len2; *timestamp = pos; } if(rm->remaining_len < len) return -1; rm->remaining_len -= len; if(av_new_packet(pkt, len + 9) < 0) return AVERROR(EIO); pkt->data[0] = 0; AV_WL32(pkt->data + 1, 1); AV_WL32(pkt->data + 5, 0); avio_read(pb, pkt->data + 9, len); return 0; } //now we have to deal with single slice *pseq = seq; if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){ vst->slices = ((hdr & 0x3F) << 1) + 1; vst->videobufsize = len2 + 8*vst->slices + 1; av_free_packet(&vst->pkt); //FIXME this should be output. if(av_new_packet(&vst->pkt, vst->videobufsize) < 0) return AVERROR(ENOMEM); vst->videobufpos = 8*vst->slices + 1; vst->cur_slice = 0; vst->curpic_num = pic_num; vst->pktpos = avio_tell(pb); } if(type == 2) len = FFMIN(len, pos); if(++vst->cur_slice > vst->slices) return 1; AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1); AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1); if(vst->videobufpos + len > vst->videobufsize) return 1; if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len) return AVERROR(EIO); vst->videobufpos += len; rm->remaining_len-= len; if (type == 2 || vst->videobufpos == vst->videobufsize) { vst->pkt.data[0] = vst->cur_slice-1; *pkt= vst->pkt; vst->pkt.data= NULL; vst->pkt.size= 0; if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices, vst->videobufpos - 1 - 8*vst->slices); pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices); pkt->pts = AV_NOPTS_VALUE; pkt->pos = vst->pktpos; vst->slices = 0; return 0; } return 1; } static inline void rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt) { uint8_t *ptr; int j; if (st->codec->codec_id == CODEC_ID_AC3) { ptr = pkt->data; for (j=0;j<pkt->size;j+=2) { FFSWAP(int, ptr[0], ptr[1]); ptr += 2; } } } /** * Perform 4-bit block reordering for SIPR data. * @todo This can be optimized, e.g. use memcpy() if data blocks are aligned */ void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize) { int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket for (n = 0; n < 38; n++) { int j; int i = bs * sipr_swaps[n][0]; int o = bs * sipr_swaps[n][1]; /* swap 4bit-nibbles of block 'i' with 'o' */ for (j = 0; j < bs; j++, i++, o++) { int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF, y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF; buf[o >> 1] = (x << (4 * (o & 1))) | (buf[o >> 1] & (0xF << (4 * !(o & 1)))); buf[i >> 1] = (y << (4 * (i & 1))) | (buf[i >> 1] & (0xF << (4 * !(i & 1)))); } } } int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, int len, AVPacket *pkt, int *seq, int flags, int64_t timestamp) { RMDemuxContext *rm = s->priv_data; if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { rm->current_stream= st->id; if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp)) return -1; //got partial frame } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { if ((ast->deint_id == DEINT_ID_GENR) || (ast->deint_id == DEINT_ID_INT4) || (ast->deint_id == DEINT_ID_SIPR)) { int x; int sps = ast->sub_packet_size; int cfs = ast->coded_framesize; int h = ast->sub_packet_h; int y = ast->sub_packet_cnt; int w = ast->audio_framesize; if (flags & 2) y = ast->sub_packet_cnt = 0; if (!y) ast->audiotimestamp = timestamp; switch (ast->deint_id) { case DEINT_ID_INT4: for (x = 0; x < h/2; x++) avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs); break; case DEINT_ID_GENR: for (x = 0; x < w/sps; x++) avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); break; case DEINT_ID_SIPR: avio_read(pb, ast->pkt.data + y * w, w); break; } if (++(ast->sub_packet_cnt) < h) return -1; if (ast->deint_id == DEINT_ID_SIPR) ff_rm_reorder_sipr_data(ast->pkt.data, h, w); ast->sub_packet_cnt = 0; rm->audio_stream_num = st->index; rm->audio_pkt_cnt = h * w / st->codec->block_align; } else if ((ast->deint_id == DEINT_ID_VBRF) || (ast->deint_id == DEINT_ID_VBRS)) { int x; rm->audio_stream_num = st->index; ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4; if (ast->sub_packet_cnt) { for (x = 0; x < ast->sub_packet_cnt; x++) ast->sub_packet_lengths[x] = avio_rb16(pb); rm->audio_pkt_cnt = ast->sub_packet_cnt; ast->audiotimestamp = timestamp; } else return -1; } else { av_get_packet(pb, pkt, len); rm_ac3_swap_bytes(st, pkt); } } else av_get_packet(pb, pkt, len); pkt->stream_index = st->index; #if 0 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { if(st->codec->codec_id == CODEC_ID_RV20){ int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1); av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq); seq |= (timestamp&~0x3FFF); if(seq - timestamp > 0x2000) seq -= 0x4000; if(seq - timestamp < -0x2000) seq += 0x4000; } } #endif pkt->pts = timestamp; if (flags & 2) pkt->flags |= AV_PKT_FLAG_KEY; return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0; } int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, AVPacket *pkt) { RMDemuxContext *rm = s->priv_data; assert (rm->audio_pkt_cnt > 0); if (ast->deint_id == DEINT_ID_VBRF || ast->deint_id == DEINT_ID_VBRS) av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]); else { av_new_packet(pkt, st->codec->block_align); memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), st->codec->block_align); } rm->audio_pkt_cnt--; if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) { ast->audiotimestamp = AV_NOPTS_VALUE; pkt->flags = AV_PKT_FLAG_KEY; } else pkt->flags = 0; pkt->stream_index = st->index; return rm->audio_pkt_cnt; } static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) { RMDemuxContext *rm = s->priv_data; AVStream *st; int i, len, res, seq = 1; int64_t timestamp, pos; int flags; for (;;) { if (rm->audio_pkt_cnt) { // If there are queued audio packet return them first st = s->streams[rm->audio_stream_num]; ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt); flags = 0; } else { if (rm->old_format) { RMStream *ast; st = s->streams[0]; ast = st->priv_data; timestamp = AV_NOPTS_VALUE; len = !ast->audio_framesize ? RAW_PACKET_SIZE : ast->coded_framesize * ast->sub_packet_h / 2; flags = (seq++ == 1) ? 2 : 0; pos = avio_tell(s->pb); } else { len=sync(s, ×tamp, &flags, &i, &pos); if (len > 0) st = s->streams[i]; } if(len<0 || s->pb->eof_reached) return AVERROR(EIO); res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt, &seq, flags, timestamp); if((flags&2) && (seq&0x7F) == 1) av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); if (res) continue; } if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) || st->discard >= AVDISCARD_ALL){ av_free_packet(pkt); } else break; } return 0; } static int rm_read_close(AVFormatContext *s) { int i; for (i=0;i<s->nb_streams;i++) ff_rm_free_rmstream(s->streams[i]->priv_data); return 0; } static int rm_probe(AVProbeData *p) { /* check file header */ if ((p->buf[0] == '.' && p->buf[1] == 'R' && p->buf[2] == 'M' && p->buf[3] == 'F' && p->buf[4] == 0 && p->buf[5] == 0) || (p->buf[0] == '.' && p->buf[1] == 'r' && p->buf[2] == 'a' && p->buf[3] == 0xfd)) return AVPROBE_SCORE_MAX; else return 0; } static int64_t rm_read_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) { RMDemuxContext *rm = s->priv_data; int64_t pos, dts; int stream_index2, flags, len, h; pos = *ppos; if(rm->old_format) return AV_NOPTS_VALUE; avio_seek(s->pb, pos, SEEK_SET); rm->remaining_len=0; for(;;){ int seq=1; AVStream *st; len=sync(s, &dts, &flags, &stream_index2, &pos); if(len<0) return AV_NOPTS_VALUE; st = s->streams[stream_index2]; if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { h= avio_r8(s->pb); len--; if(!(h & 0x40)){ seq = avio_r8(s->pb); len--; } } if((flags&2) && (seq&0x7F) == 1){ // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq); av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME); if(stream_index2 == stream_index) break; } avio_skip(s->pb, len); } *ppos = pos; return dts; } AVInputFormat ff_rm_demuxer = { .name = "rm", .long_name = NULL_IF_CONFIG_SMALL("RealMedia format"), .priv_data_size = sizeof(RMDemuxContext), .read_probe = rm_probe, .read_header = rm_read_header, .read_packet = rm_read_packet, .read_close = rm_read_close, .read_timestamp = rm_read_dts, }; AVInputFormat ff_rdt_demuxer = { .name = "rdt", .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"), .priv_data_size = sizeof(RMDemuxContext), .read_close = rm_read_close, .flags = AVFMT_NOFILE, };