mirror of https://git.ffmpeg.org/ffmpeg.git
1412 lines
46 KiB
C
1412 lines
46 KiB
C
/*
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* "Real" compatible demuxer.
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* Copyright (c) 2000, 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/dict.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "demux.h"
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#include "internal.h"
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#include "rmsipr.h"
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#include "rm.h"
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#define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/ATRAC
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#define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
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#define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
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#define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
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#define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
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#define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
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struct RMStream {
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AVPacket pkt; ///< place to store merged video frame / reordered audio data
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int videobufsize; ///< current assembled frame size
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int videobufpos; ///< position for the next slice in the video buffer
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int curpic_num; ///< picture number of current frame
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int cur_slice, slices;
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int64_t pktpos; ///< first slice position in file
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/// Audio descrambling matrix parameters
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int64_t audiotimestamp; ///< Audio packet timestamp
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int sub_packet_cnt; // Subpacket counter, used while reading
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int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
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int audio_framesize; ///< Audio frame size from container
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int sub_packet_lengths[16]; ///< Length of each subpacket
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int32_t deint_id; ///< deinterleaver used in audio stream
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};
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typedef struct RMDemuxContext {
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int nb_packets;
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int old_format;
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int current_stream;
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int remaining_len;
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int audio_stream_num; ///< Stream number for audio packets
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int audio_pkt_cnt; ///< Output packet counter
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int data_end;
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} RMDemuxContext;
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static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
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{
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int read = avio_get_str(pb, len, buf, buf_size);
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if (read > 0)
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avio_skip(pb, len - read);
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}
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static void get_str8(AVIOContext *pb, char *buf, int buf_size)
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{
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get_strl(pb, buf, buf_size, avio_r8(pb));
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}
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static int rm_read_extradata(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, unsigned size)
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{
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if (size >= 1<<24) {
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av_log(s, AV_LOG_ERROR, "extradata size %u too large\n", size);
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return -1;
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}
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return ff_get_extradata(s, par, pb, size);
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}
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static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
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{
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char buf[1024];
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int i;
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for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
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int len = wide ? avio_rb16(pb) : avio_r8(pb);
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if (len > 0) {
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get_strl(pb, buf, sizeof(buf), len);
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av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
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}
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}
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}
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RMStream *ff_rm_alloc_rmstream (void)
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{
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RMStream *rms = av_mallocz(sizeof(RMStream));
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if (!rms)
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return NULL;
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rms->curpic_num = -1;
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return rms;
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}
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void ff_rm_free_rmstream (RMStream *rms)
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{
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if (!rms)
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return;
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av_packet_unref(&rms->pkt);
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}
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static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
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AVStream *st, RMStream *ast, int read_all)
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{
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FFStream *const sti = ffstream(st);
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char buf[256];
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uint32_t version;
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int ret;
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/* ra type header */
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version = avio_rb16(pb); /* version */
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if (version == 3) {
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unsigned bytes_per_minute;
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int header_size = avio_rb16(pb);
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int64_t startpos = avio_tell(pb);
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avio_skip(pb, 8);
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bytes_per_minute = avio_rb16(pb);
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avio_skip(pb, 4);
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rm_read_metadata(s, pb, 0);
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if ((startpos + header_size) >= avio_tell(pb) + 2) {
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// fourcc (should always be "lpcJ")
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avio_r8(pb);
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get_str8(pb, buf, sizeof(buf));
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}
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// Skip extra header crap (this should never happen)
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if ((startpos + header_size) > avio_tell(pb))
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avio_skip(pb, header_size + startpos - avio_tell(pb));
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if (bytes_per_minute)
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st->codecpar->bit_rate = 8LL * bytes_per_minute / 60;
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st->codecpar->sample_rate = 8000;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_RA_144;
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ast->deint_id = DEINT_ID_INT0;
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} else {
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int flavor, sub_packet_h, coded_framesize, sub_packet_size;
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int codecdata_length;
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unsigned bytes_per_minute;
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/* old version (4) */
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avio_skip(pb, 2); /* unused */
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avio_rb32(pb); /* .ra4 */
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avio_rb32(pb); /* data size */
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avio_rb16(pb); /* version2 */
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avio_rb32(pb); /* header size */
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flavor= avio_rb16(pb); /* add codec info / flavor */
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coded_framesize = avio_rb32(pb); /* coded frame size */
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if (coded_framesize < 0)
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return AVERROR_INVALIDDATA;
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ast->coded_framesize = coded_framesize;
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avio_rb32(pb); /* ??? */
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bytes_per_minute = avio_rb32(pb);
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if (version == 4) {
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if (bytes_per_minute)
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st->codecpar->bit_rate = 8LL * bytes_per_minute / 60;
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}
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avio_rb32(pb); /* ??? */
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ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
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st->codecpar->block_align= avio_rb16(pb); /* frame size */
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ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
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avio_rb16(pb); /* ??? */
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if (version == 5) {
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avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
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}
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st->codecpar->sample_rate = avio_rb16(pb);
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avio_rb32(pb);
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st->codecpar->ch_layout.nb_channels = avio_rb16(pb);
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if (version == 5) {
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ast->deint_id = avio_rl32(pb);
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avio_read(pb, buf, 4);
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buf[4] = 0;
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} else {
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AV_WL32(buf, 0);
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get_str8(pb, buf, sizeof(buf)); /* desc */
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ast->deint_id = AV_RL32(buf);
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get_str8(pb, buf, sizeof(buf)); /* desc */
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}
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_tag = AV_RL32(buf);
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st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
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st->codecpar->codec_tag);
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switch (st->codecpar->codec_id) {
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case AV_CODEC_ID_AC3:
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sti->need_parsing = AVSTREAM_PARSE_FULL;
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break;
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case AV_CODEC_ID_RA_288:
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st->codecpar->extradata_size= 0;
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av_freep(&st->codecpar->extradata);
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ast->audio_framesize = st->codecpar->block_align;
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st->codecpar->block_align = coded_framesize;
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break;
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case AV_CODEC_ID_COOK:
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sti->need_parsing = AVSTREAM_PARSE_HEADERS;
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case AV_CODEC_ID_ATRAC3:
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case AV_CODEC_ID_SIPR:
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if (read_all) {
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codecdata_length = 0;
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} else {
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avio_rb16(pb); avio_r8(pb);
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if (version == 5)
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avio_r8(pb);
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codecdata_length = avio_rb32(pb);
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if((unsigned)codecdata_length > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE){
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av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
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return -1;
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}
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}
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ast->audio_framesize = st->codecpar->block_align;
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if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
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if (flavor > 3) {
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av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
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flavor);
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return -1;
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}
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st->codecpar->block_align = ff_sipr_subpk_size[flavor];
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sti->need_parsing = AVSTREAM_PARSE_FULL_RAW;
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} else {
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if(sub_packet_size <= 0){
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av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
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return -1;
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}
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st->codecpar->block_align = ast->sub_packet_size;
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}
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if ((ret = rm_read_extradata(s, pb, st->codecpar, codecdata_length)) < 0)
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return ret;
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break;
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case AV_CODEC_ID_AAC:
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avio_rb16(pb); avio_r8(pb);
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if (version == 5)
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avio_r8(pb);
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codecdata_length = avio_rb32(pb);
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if((unsigned)codecdata_length > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE){
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av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
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return -1;
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}
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if (codecdata_length >= 1) {
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avio_r8(pb);
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if ((ret = rm_read_extradata(s, pb, st->codecpar, codecdata_length - 1)) < 0)
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return ret;
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}
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break;
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}
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switch (ast->deint_id) {
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case DEINT_ID_INT4:
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if (ast->coded_framesize > ast->audio_framesize ||
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sub_packet_h <= 1 ||
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ast->coded_framesize * (uint64_t)sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
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return AVERROR_INVALIDDATA;
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if (ast->coded_framesize * (uint64_t)sub_packet_h != 2*ast->audio_framesize) {
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avpriv_request_sample(s, "mismatching interleaver parameters");
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return AVERROR_INVALIDDATA;
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}
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break;
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case DEINT_ID_GENR:
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if (ast->sub_packet_size <= 0 ||
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ast->sub_packet_size > ast->audio_framesize)
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return AVERROR_INVALIDDATA;
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if (ast->audio_framesize % ast->sub_packet_size)
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return AVERROR_INVALIDDATA;
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break;
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case DEINT_ID_SIPR:
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case DEINT_ID_INT0:
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case DEINT_ID_VBRS:
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case DEINT_ID_VBRF:
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break;
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default:
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av_log(s, AV_LOG_ERROR ,"Unknown interleaver %"PRIX32"\n", ast->deint_id);
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return AVERROR_INVALIDDATA;
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}
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if (ast->deint_id == DEINT_ID_INT4 ||
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ast->deint_id == DEINT_ID_GENR ||
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ast->deint_id == DEINT_ID_SIPR) {
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if (st->codecpar->block_align <= 0 ||
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ast->audio_framesize * (uint64_t)sub_packet_h > (unsigned)INT_MAX ||
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ast->audio_framesize * sub_packet_h < st->codecpar->block_align)
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return AVERROR_INVALIDDATA;
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if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
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return AVERROR(ENOMEM);
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}
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if (read_all) {
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avio_r8(pb);
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avio_r8(pb);
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avio_r8(pb);
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rm_read_metadata(s, pb, 0);
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}
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}
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return 0;
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}
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int ff_rm_read_mdpr_codecdata(AVFormatContext *s, AVIOContext *pb,
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AVStream *st, RMStream *rst,
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unsigned int codec_data_size, const uint8_t *mime)
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{
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unsigned int v;
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int size;
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int64_t codec_pos;
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int ret;
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if (codec_data_size > INT_MAX)
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return AVERROR_INVALIDDATA;
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if (codec_data_size == 0)
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return 0;
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// Duplicate tags
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if ( st->codecpar->codec_type != AVMEDIA_TYPE_UNKNOWN
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&& st->codecpar->codec_type != AVMEDIA_TYPE_DATA)
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return AVERROR_INVALIDDATA;
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avpriv_set_pts_info(st, 64, 1, 1000);
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codec_pos = avio_tell(pb);
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v = avio_rb32(pb);
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if (v == MKTAG(0xfd, 'a', 'r', '.')) {
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/* ra type header */
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if (rm_read_audio_stream_info(s, pb, st, rst, 0))
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return -1;
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} else if (v == MKBETAG('L', 'S', 'D', ':')) {
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avio_seek(pb, -4, SEEK_CUR);
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if ((ret = rm_read_extradata(s, pb, st->codecpar, codec_data_size)) < 0)
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return ret;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_tag = AV_RL32(st->codecpar->extradata);
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st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
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st->codecpar->codec_tag);
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} else if(mime && !strcmp(mime, "logical-fileinfo")){
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int stream_count, rule_count, property_count, i;
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ff_remove_stream(s, st);
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if (avio_rb16(pb) != 0) {
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av_log(s, AV_LOG_WARNING, "Unsupported version\n");
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goto skip;
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}
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stream_count = avio_rb16(pb);
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avio_skip(pb, 6*stream_count);
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rule_count = avio_rb16(pb);
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avio_skip(pb, 2*rule_count);
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property_count = avio_rb16(pb);
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for(i=0; i<property_count; i++){
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uint8_t name[128], val[128];
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avio_rb32(pb);
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if (avio_rb16(pb) != 0) {
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av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
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goto skip; //FIXME skip just this one
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}
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get_str8(pb, name, sizeof(name));
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switch(avio_rb32(pb)) {
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case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
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av_dict_set(&s->metadata, name, val, 0);
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break;
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default: avio_skip(pb, avio_rb16(pb));
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}
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}
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} else {
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int fps;
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if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
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fail1:
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av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
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goto skip;
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}
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st->codecpar->codec_tag = avio_rl32(pb);
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st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
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st->codecpar->codec_tag);
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av_log(s, AV_LOG_TRACE, "%"PRIX32" %X\n",
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st->codecpar->codec_tag, MKTAG('R', 'V', '2', '0'));
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if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
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goto fail1;
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st->codecpar->width = avio_rb16(pb);
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st->codecpar->height = avio_rb16(pb);
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avio_skip(pb, 2); // looks like bits per sample
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avio_skip(pb, 4); // always zero?
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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ffstream(st)->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
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fps = avio_rb32(pb);
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|
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if ((ret = rm_read_extradata(s, pb, st->codecpar, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
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return ret;
|
|
|
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if (fps > 0) {
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av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
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0x10000, fps, (1 << 30) - 1);
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#if FF_API_R_FRAME_RATE
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st->r_frame_rate = st->avg_frame_rate;
|
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#endif
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} else if (s->error_recognition & AV_EF_EXPLODE) {
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av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
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return AVERROR_INVALIDDATA;
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}
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}
|
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|
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skip:
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/* skip codec info */
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size = avio_tell(pb) - codec_pos;
|
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if (codec_data_size >= size) {
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avio_skip(pb, codec_data_size - size);
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} else {
|
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av_log(s, AV_LOG_WARNING, "codec_data_size %u < size %d\n", codec_data_size, size);
|
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}
|
|
|
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return 0;
|
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}
|
|
|
|
/** 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;
|
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unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
|
|
AVStream *st;
|
|
|
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do {
|
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if (avio_rl32(pb) != MKTAG('I','N','D','X'))
|
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return -1;
|
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size = avio_rb32(pb);
|
|
if (size < 20)
|
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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++) {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
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();
|
|
if (!st->priv_data)
|
|
return AVERROR(ENOMEM);
|
|
return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
|
|
}
|
|
|
|
static int rm_read_multi(AVFormatContext *s, AVIOContext *pb,
|
|
AVStream *st, char *mime)
|
|
{
|
|
int number_of_streams = avio_rb16(pb);
|
|
int number_of_mdpr;
|
|
int i, ret;
|
|
unsigned size2;
|
|
for (i = 0; i<number_of_streams; i++)
|
|
avio_rb16(pb);
|
|
number_of_mdpr = avio_rb16(pb);
|
|
if (number_of_mdpr != 1) {
|
|
avpriv_request_sample(s, "MLTI with multiple (%d) MDPR", number_of_mdpr);
|
|
}
|
|
for (i = 0; i < number_of_mdpr; i++) {
|
|
AVStream *st2;
|
|
if (i > 0) {
|
|
st2 = avformat_new_stream(s, NULL);
|
|
if (!st2) {
|
|
ret = AVERROR(ENOMEM);
|
|
return ret;
|
|
}
|
|
st2->id = st->id + (i<<16);
|
|
st2->codecpar->bit_rate = st->codecpar->bit_rate;
|
|
st2->start_time = st->start_time;
|
|
st2->duration = st->duration;
|
|
st2->codecpar->codec_type = AVMEDIA_TYPE_DATA;
|
|
st2->priv_data = ff_rm_alloc_rmstream();
|
|
if (!st2->priv_data)
|
|
return AVERROR(ENOMEM);
|
|
} else
|
|
st2 = st;
|
|
|
|
size2 = avio_rb32(pb);
|
|
ret = ff_rm_read_mdpr_codecdata(s, s->pb, st2, st2->priv_data,
|
|
size2, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
unsigned size, v;
|
|
int64_t codec_pos;
|
|
|
|
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);
|
|
if (tag_size < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, tag_size - 8);
|
|
|
|
for(;;) {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
tag = avio_rl32(pb);
|
|
tag_size = avio_rb32(pb);
|
|
avio_rb16(pb);
|
|
av_log(s, AV_LOG_TRACE, "tag=%s size=%d\n",
|
|
av_fourcc2str(tag), tag_size);
|
|
if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
|
|
return AVERROR_INVALIDDATA;
|
|
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, 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->codecpar->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->codecpar->codec_type = AVMEDIA_TYPE_DATA;
|
|
st->priv_data = ff_rm_alloc_rmstream();
|
|
if (!st->priv_data)
|
|
return AVERROR(ENOMEM);
|
|
|
|
size = avio_rb32(pb);
|
|
codec_pos = avio_tell(pb);
|
|
|
|
ffio_ensure_seekback(pb, 4);
|
|
v = avio_rb32(pb);
|
|
if (v == MKBETAG('M', 'L', 'T', 'I')) {
|
|
ret = rm_read_multi(s, s->pb, st, mime);
|
|
if (ret < 0)
|
|
return ret;
|
|
avio_seek(pb, codec_pos + size, SEEK_SET);
|
|
} else {
|
|
avio_skip(pb, -4);
|
|
ret = ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
|
|
size, mime);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
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 & AVIO_SEEKABLE_NORMAL) &&
|
|
!(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 rm_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(!avio_feof(pb)){
|
|
int len, num, i;
|
|
int mlti_id;
|
|
*pos= avio_tell(pb) - 3;
|
|
if(rm->remaining_len > 0){
|
|
num= rm->current_stream;
|
|
mlti_id = 0;
|
|
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;
|
|
int64_t expected_len;
|
|
len = avio_rb32(pb);
|
|
avio_skip(pb, 2);
|
|
n_pkts = avio_rb32(pb);
|
|
expected_len = 20 + n_pkts * 14LL;
|
|
|
|
if (len == 20 && expected_len <= INT_MAX)
|
|
/* 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 %"PRId64".\n",
|
|
len, n_pkts, expected_len);
|
|
if(len < 14)
|
|
continue;
|
|
len -= 14; // we already read part of the index header
|
|
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);
|
|
mlti_id = (avio_r8(pb) >> 1) - 1;
|
|
mlti_id = FFMAX(mlti_id, 0) << 16;
|
|
*flags = avio_r8(pb); /* flags */
|
|
}
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
st = s->streams[i];
|
|
if (mlti_id + 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 silence compiler warning
|
|
int type;
|
|
int ret;
|
|
|
|
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) {
|
|
av_log(s, AV_LOG_ERROR, "Insufficient data\n");
|
|
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) {
|
|
av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
|
|
return -1;
|
|
}
|
|
rm->remaining_len -= len;
|
|
if ((ret = av_new_packet(pkt, len + 9)) < 0)
|
|
return ret;
|
|
pkt->data[0] = 0;
|
|
AV_WL32(pkt->data + 1, 1);
|
|
AV_WL32(pkt->data + 5, 0);
|
|
if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
|
|
av_packet_unref(pkt);
|
|
av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
|
|
return ret < 0 ? ret : AVERROR(EIO);
|
|
}
|
|
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_packet_unref(&vst->pkt); //FIXME this should be output.
|
|
if ((ret = av_new_packet(&vst->pkt, vst->videobufsize)) < 0)
|
|
return ret;
|
|
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) {
|
|
av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
|
|
return 1;
|
|
}
|
|
if(!vst->pkt.data)
|
|
return AVERROR(ENOMEM);
|
|
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) {
|
|
av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
|
|
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;
|
|
av_packet_move_ref(pkt, &vst->pkt);
|
|
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);
|
|
av_shrink_packet(pkt, 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->codecpar->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;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {
|
|
int ret = avio_read(pb, dst, n);
|
|
if (ret != n) {
|
|
if (ret >= 0) memset(dst + ret, 0, n - ret);
|
|
else memset(dst , 0, n);
|
|
av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
rm->current_stream= st->id;
|
|
ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp);
|
|
if(ret)
|
|
return ret < 0 ? ret : -1; //got partial frame or error
|
|
} else if (st->codecpar->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++)
|
|
readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);
|
|
break;
|
|
case DEINT_ID_GENR:
|
|
for (x = 0; x < w/sps; x++)
|
|
readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
|
|
break;
|
|
case DEINT_ID_SIPR:
|
|
readfull(s, 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;
|
|
if (st->codecpar->block_align <= 0) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid block alignment %d\n", st->codecpar->block_align);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
rm->audio_pkt_cnt = h * w / st->codecpar->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 {
|
|
ret = av_get_packet(pb, pkt, len);
|
|
if (ret < 0)
|
|
return ret;
|
|
rm_ac3_swap_bytes(st, pkt);
|
|
}
|
|
} else {
|
|
ret = av_get_packet(pb, pkt, len);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
pkt->stream_index = st->index;
|
|
|
|
pkt->pts = timestamp;
|
|
if (flags & 2)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
return st->codecpar->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;
|
|
int ret;
|
|
|
|
av_assert0 (rm->audio_pkt_cnt > 0);
|
|
|
|
if (ast->deint_id == DEINT_ID_VBRF ||
|
|
ast->deint_id == DEINT_ID_VBRS) {
|
|
ret = av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
ret = av_new_packet(pkt, st->codecpar->block_align);
|
|
if (ret < 0)
|
|
return ret;
|
|
memcpy(pkt->data, ast->pkt.data + st->codecpar->block_align * //FIXME avoid this
|
|
(ast->sub_packet_h * ast->audio_framesize / st->codecpar->block_align - rm->audio_pkt_cnt),
|
|
st->codecpar->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, res, seq = 1;
|
|
int64_t timestamp, pos, len;
|
|
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 * (int64_t)ast->sub_packet_h / 2;
|
|
if (len > INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
flags = (seq++ == 1) ? 2 : 0;
|
|
pos = avio_tell(s->pb);
|
|
} else {
|
|
len = rm_sync(s, ×tamp, &flags, &i, &pos);
|
|
if (len > 0)
|
|
st = s->streams[i];
|
|
}
|
|
|
|
if (avio_feof(s->pb))
|
|
return AVERROR_EOF;
|
|
if (len <= 0)
|
|
return AVERROR(EIO);
|
|
|
|
res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
|
|
&seq, flags, timestamp);
|
|
if (res < -1)
|
|
return res;
|
|
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_packet_unref(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(const 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 = rm_sync(s, &dts, &flags, &stream_index2, &pos);
|
|
if(len<0)
|
|
return AV_NOPTS_VALUE;
|
|
|
|
st = s->streams[stream_index2];
|
|
if (st->codecpar->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_TRACE, "%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;
|
|
}
|
|
|
|
|
|
const FFInputFormat ff_rm_demuxer = {
|
|
.p.name = "rm",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
|
|
.priv_data_size = sizeof(RMDemuxContext),
|
|
.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
|
|
.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,
|
|
};
|
|
|
|
const FFInputFormat ff_rdt_demuxer = {
|
|
.p.name = "rdt",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
|
|
.p.flags = AVFMT_NOFILE,
|
|
.priv_data_size = sizeof(RMDemuxContext),
|
|
.read_close = rm_read_close,
|
|
};
|
|
|
|
static int ivr_probe(const AVProbeData *p)
|
|
{
|
|
if (memcmp(p->buf, ".R1M\x0\x1\x1", 7) &&
|
|
memcmp(p->buf, ".REC", 4))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int ivr_read_header(AVFormatContext *s)
|
|
{
|
|
unsigned tag, type, len, tlen, value;
|
|
int i, j, n, count, nb_streams = 0, ret;
|
|
uint8_t key[256], val[256];
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
int64_t pos, offset=0, temp;
|
|
|
|
pos = avio_tell(pb);
|
|
tag = avio_rl32(pb);
|
|
if (tag == MKTAG('.','R','1','M')) {
|
|
if (avio_rb16(pb) != 1)
|
|
return AVERROR_INVALIDDATA;
|
|
if (avio_r8(pb) != 1)
|
|
return AVERROR_INVALIDDATA;
|
|
len = avio_rb32(pb);
|
|
avio_skip(pb, len);
|
|
avio_skip(pb, 5);
|
|
temp = avio_rb64(pb);
|
|
while (!avio_feof(pb) && temp) {
|
|
offset = temp;
|
|
temp = avio_rb64(pb);
|
|
}
|
|
if (offset <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, offset - avio_tell(pb));
|
|
if (avio_r8(pb) != 1)
|
|
return AVERROR_INVALIDDATA;
|
|
len = avio_rb32(pb);
|
|
avio_skip(pb, len);
|
|
if (avio_r8(pb) != 2)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, 16);
|
|
pos = avio_tell(pb);
|
|
tag = avio_rl32(pb);
|
|
}
|
|
|
|
if (tag != MKTAG('.','R','E','C'))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (avio_r8(pb) != 0)
|
|
return AVERROR_INVALIDDATA;
|
|
count = avio_rb32(pb);
|
|
for (i = 0; i < count; i++) {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
type = avio_r8(pb);
|
|
tlen = avio_rb32(pb);
|
|
avio_get_str(pb, tlen, key, sizeof(key));
|
|
len = avio_rb32(pb);
|
|
if (type == 5) {
|
|
avio_get_str(pb, len, val, sizeof(val));
|
|
av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val);
|
|
} else if (type == 4) {
|
|
av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
|
|
for (j = 0; j < len; j++) {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
|
|
}
|
|
av_log(s, AV_LOG_DEBUG, "'\n");
|
|
} else if (len == 4 && type == 3 && !strncmp(key, "StreamCount", tlen)) {
|
|
nb_streams = value = avio_rb32(pb);
|
|
} else if (len == 4 && type == 3) {
|
|
value = avio_rb32(pb);
|
|
av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value);
|
|
} else {
|
|
av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key);
|
|
avio_skip(pb, len);
|
|
}
|
|
}
|
|
|
|
for (n = 0; n < nb_streams; n++) {
|
|
if (!(st = avformat_new_stream(s, NULL)) ||
|
|
!(st->priv_data = ff_rm_alloc_rmstream()))
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (avio_r8(pb) != 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
count = avio_rb32(pb);
|
|
for (i = 0; i < count; i++) {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
type = avio_r8(pb);
|
|
tlen = avio_rb32(pb);
|
|
avio_get_str(pb, tlen, key, sizeof(key));
|
|
len = avio_rb32(pb);
|
|
if (type == 5) {
|
|
avio_get_str(pb, len, val, sizeof(val));
|
|
av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val);
|
|
} else if (type == 4 && !strncmp(key, "OpaqueData", tlen)) {
|
|
ret = ffio_ensure_seekback(pb, 4);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (avio_rb32(pb) == MKBETAG('M', 'L', 'T', 'I')) {
|
|
ret = rm_read_multi(s, pb, st, NULL);
|
|
} else {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
avio_seek(pb, -4, SEEK_CUR);
|
|
ret = ff_rm_read_mdpr_codecdata(s, pb, st, st->priv_data, len, NULL);
|
|
}
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
} else if (type == 4) {
|
|
int j;
|
|
|
|
av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
|
|
for (j = 0; j < len; j++) {
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
|
|
}
|
|
av_log(s, AV_LOG_DEBUG, "'\n");
|
|
} else if (len == 4 && type == 3 && !strncmp(key, "Duration", tlen)) {
|
|
st->duration = avio_rb32(pb);
|
|
} else if (len == 4 && type == 3) {
|
|
value = avio_rb32(pb);
|
|
av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value);
|
|
} else {
|
|
av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key);
|
|
avio_skip(pb, len);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (avio_r8(pb) != 6)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, 12);
|
|
avio_seek(pb, avio_rb64(pb) + pos, SEEK_SET);
|
|
if (avio_r8(pb) != 8)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ivr_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
RMDemuxContext *rm = s->priv_data;
|
|
int ret = AVERROR_EOF, opcode;
|
|
AVIOContext *pb = s->pb;
|
|
unsigned size, index;
|
|
int64_t pos, pts;
|
|
|
|
if (avio_feof(pb) || rm->data_end)
|
|
return AVERROR_EOF;
|
|
|
|
pos = avio_tell(pb);
|
|
|
|
for (;;) {
|
|
if (rm->audio_pkt_cnt) {
|
|
// If there are queued audio packet return them first
|
|
AVStream *st;
|
|
|
|
st = s->streams[rm->audio_stream_num];
|
|
ret = ff_rm_retrieve_cache(s, pb, st, st->priv_data, pkt);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
} else {
|
|
if (rm->remaining_len) {
|
|
avio_skip(pb, rm->remaining_len);
|
|
rm->remaining_len = 0;
|
|
}
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
opcode = avio_r8(pb);
|
|
if (opcode == 2) {
|
|
AVStream *st;
|
|
int seq = 1;
|
|
|
|
pts = avio_rb32(pb);
|
|
index = avio_rb16(pb);
|
|
if (index >= s->nb_streams)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(pb, 4);
|
|
size = avio_rb32(pb);
|
|
avio_skip(pb, 4);
|
|
|
|
if (size < 1 || size > INT_MAX/4) {
|
|
av_log(s, AV_LOG_ERROR, "size %u is invalid\n", size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
st = s->streams[index];
|
|
ret = ff_rm_parse_packet(s, pb, st, st->priv_data, size, pkt,
|
|
&seq, 0, pts);
|
|
if (ret < -1) {
|
|
return ret;
|
|
} else if (ret) {
|
|
continue;
|
|
}
|
|
|
|
pkt->pos = pos;
|
|
pkt->pts = pts;
|
|
pkt->stream_index = index;
|
|
} else if (opcode == 7) {
|
|
pos = avio_rb64(pb);
|
|
if (!pos) {
|
|
rm->data_end = 1;
|
|
return AVERROR_EOF;
|
|
}
|
|
} else {
|
|
av_log(s, AV_LOG_ERROR, "Unsupported opcode=%d at %"PRIX64"\n", opcode, avio_tell(pb) - 1);
|
|
return AVERROR(EIO);
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
const FFInputFormat ff_ivr_demuxer = {
|
|
.p.name = "ivr",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("IVR (Internet Video Recording)"),
|
|
.p.extensions = "ivr",
|
|
.priv_data_size = sizeof(RMDemuxContext),
|
|
.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
|
|
.read_probe = ivr_probe,
|
|
.read_header = ivr_read_header,
|
|
.read_packet = ivr_read_packet,
|
|
.read_close = rm_read_close,
|
|
};
|