| /* |
| * "Real" compatible demuxer. |
| * Copyright (c) 2000, 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 "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, AVIOContext *pb, int wide) |
| { |
| char buf[1024]; |
| int i; |
| |
| for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) { |
| int len = wide ? avio_rb16(pb) : avio_r8(pb); |
| get_strl(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, pb, 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 || |
| sub_packet_h <= 1 || |
| 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, pb, 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(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v); |
| 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) { |
| av_log(s, AV_LOG_ERROR, |
| "Invalid stream index %d for index at pos %"PRId64"\n", |
| str_id, avio_tell(pb)); |
| goto skip; |
| } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) { |
| av_log(s, AV_LOG_ERROR, |
| "Nr. of packets in packet index for stream index %d " |
| "exceeds filesize (%"PRId64" at %"PRId64" = %d)\n", |
| str_id, avio_size(pb), avio_tell(pb), |
| (avio_size(pb) - avio_tell(pb)) / 14); |
| 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) { |
| av_log(s, AV_LOG_ERROR, |
| "Non-linear index detected, not supported\n"); |
| 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, AVFormatParameters *ap) |
| { |
| 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 (url_feof(pb)) |
| 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, pb, 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(!url_feof(pb)){ |
| 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 || url_feof(s->pb)) |
| 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; |
| |
| if (avio_seek(s->pb, pos, SEEK_SET) < 0) |
| return AV_NOPTS_VALUE; |
| |
| 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; |
| } |
| |
| static int rm_read_seek(AVFormatContext *s, int stream_index, |
| int64_t pts, int flags) |
| { |
| RMDemuxContext *rm = s->priv_data; |
| |
| if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0) |
| return -1; |
| rm->audio_pkt_cnt = 0; |
| return 0; |
| } |
| |
| |
| 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, |
| .read_seek = rm_read_seek, |
| }; |
| |
| 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, |
| }; |
