diff options
Diffstat (limited to 'ffmpeg/libavformat/rmdec.c')
| -rw-r--r-- | ffmpeg/libavformat/rmdec.c | 1037 |
1 files changed, 1037 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/rmdec.c b/ffmpeg/libavformat/rmdec.c new file mode 100644 index 0000000..478b35b --- /dev/null +++ b/ffmpeg/libavformat/rmdec.c @@ -0,0 +1,1037 @@ +/* + * "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/avassert.h" +#include "libavutil/avstring.h" +#include "libavutil/channel_layout.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/dict.h" +#include "avformat.h" +#include "avio_internal.h" +#include "internal.h" +#include "rmsipr.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 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) { + unsigned bytes_per_minute; + int header_size = avio_rb16(pb); + int64_t startpos = avio_tell(pb); + avio_skip(pb, 8); + bytes_per_minute = avio_rb16(pb); + avio_skip(pb, 4); + 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)); + if (bytes_per_minute) + st->codec->bit_rate = 8LL * bytes_per_minute / 60; + st->codec->sample_rate = 8000; + st->codec->channels = 1; + st->codec->channel_layout = AV_CH_LAYOUT_MONO; + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + st->codec->codec_id = AV_CODEC_ID_RA_144; + ast->deint_id = DEINT_ID_INT0; + } else { + int flavor, sub_packet_h, coded_framesize, sub_packet_size; + int codecdata_length; + unsigned bytes_per_minute; + /* 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); /* ??? */ + bytes_per_minute = avio_rb32(pb); + if (version == 4) { + if (bytes_per_minute) + st->codec->bit_rate = 8LL * bytes_per_minute / 60; + } + 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 AV_CODEC_ID_AC3: + st->need_parsing = AVSTREAM_PARSE_FULL; + break; + case AV_CODEC_ID_RA_288: + st->codec->extradata_size= 0; + ast->audio_framesize = st->codec->block_align; + st->codec->block_align = coded_framesize; + break; + case AV_CODEC_ID_COOK: + st->need_parsing = AVSTREAM_PARSE_HEADERS; + case AV_CODEC_ID_ATRAC3: + case AV_CODEC_ID_SIPR: + if (read_all) { + codecdata_length = 0; + } else { + 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 == AV_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 AV_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(s, AV_LOG_ERROR, "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, const uint8_t *mime) +{ + 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 if (v == MKBETAG('L', 'S', 'D', ':')) { + avio_seek(pb, -4, SEEK_CUR); + if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0) + return ret; + + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + st->codec->codec_tag = AV_RL32(st->codec->extradata); + st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags, + st->codec->codec_tag); + } else if(mime && !strcmp(mime, "logical-fileinfo")){ + int stream_count, rule_count, property_count, i; + ff_free_stream(s, st); + if (avio_rb16(pb) != 0) { + av_log(s, AV_LOG_WARNING, "Unsupported version\n"); + goto skip; + } + stream_count = avio_rb16(pb); + avio_skip(pb, 6*stream_count); + rule_count = avio_rb16(pb); + avio_skip(pb, 2*rule_count); + property_count = avio_rb16(pb); + for(i=0; i<property_count; i++){ + uint8_t name[128], val[128]; + avio_rb32(pb); + if (avio_rb16(pb) != 0) { + av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n"); + goto skip; //FIXME skip just this one + } + get_str8(pb, name, sizeof(name)); + switch(avio_rb32(pb)) { + case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb)); + av_dict_set(&s->metadata, name, val, 0); + break; + default: avio_skip(pb, avio_rb16(pb)); + } + } + } 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_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); + if (st->codec->codec_id == AV_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->avg_frame_rate.den, &st->avg_frame_rate.num, + 0x10000, fps, (1 << 30) - 1); +#if FF_API_R_FRAME_RATE + st->r_frame_rate = st->avg_frame_rate; +#endif + } + +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" = %"PRId64")\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) +{ + 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], mime[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); + } + + tag_size = avio_rb32(pb); + avio_skip(pb, tag_size - 8); + + 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 */ + duration = avio_rb32(pb); /* duration */ + s->duration = av_rescale(duration, AV_TIME_BASE, 1000); + 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; + if(duration>0) + s->duration = AV_NOPTS_VALUE; + get_str8(pb, buf, sizeof(buf)); /* desc */ + get_str8(pb, mime, sizeof(mime)); /* 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), mime) < 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; + int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning + 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){ + if (len2 > ffio_limit(pb, len2)) { + av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n"); + return AVERROR_INVALIDDATA; + } + 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; + vst->pkt.buf = NULL; +#if FF_API_DESTRUCT_PACKET + vst->pkt.destruct = NULL; +#endif + 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 == AV_CODEC_ID_AC3) { + ptr = pkt->data; + for (j=0;j<pkt->size;j+=2) { + FFSWAP(int, ptr[0], ptr[1]); + ptr += 2; + } + } +} + +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 == AV_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; + + av_assert0 (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 { + if(av_new_packet(pkt, st->codec->block_align) < 0) + return AVERROR(ENOMEM); + 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 = NULL; // init to silence compiler warning + 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]; + res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt); + if(res < 0) + return res; + 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_dlog(s, "%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"), + .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, +}; |