mirror of
https://github.com/xenia-project/FFmpeg.git
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959 lines
31 KiB
C
959 lines
31 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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavutil/avstring.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "riff.h"
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#include "rm.h"
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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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};
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typedef struct {
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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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} RMDemuxContext;
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static const unsigned char sipr_swaps[38][2] = {
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{ 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
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{ 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
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{ 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
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{ 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
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{ 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
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{ 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
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{ 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
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{ 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
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{ 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
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{ 67, 83 }, { 77, 80 }
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};
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const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
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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 i;
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char *q, r;
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q = buf;
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for(i=0;i<len;i++) {
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r = avio_r8(pb);
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if (i < buf_size - 1)
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*q++ = r;
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}
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if (buf_size > 0) *q = '\0';
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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(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
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{
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if (size >= 1<<24)
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return -1;
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avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!avctx->extradata)
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return AVERROR(ENOMEM);
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avctx->extradata_size = avio_read(pb, avctx->extradata, size);
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memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
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if (avctx->extradata_size != size)
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return AVERROR(EIO);
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return 0;
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}
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static void rm_read_metadata(AVFormatContext *s, 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(s->pb) : avio_r8(s->pb);
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get_strl(s->pb, buf, sizeof(buf), len);
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av_metadata_set2(&s->metadata, ff_rm_metadata[i], buf, 0);
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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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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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av_free_packet(&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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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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int header_size = avio_rb16(pb);
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int64_t startpos = avio_tell(pb);
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avio_skip(pb, 14);
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rm_read_metadata(s, 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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st->codec->sample_rate = 8000;
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st->codec->channels = 1;
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_RA_144;
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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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/* 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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ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
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avio_rb32(pb); /* ??? */
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avio_rb32(pb); /* ??? */
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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->codec->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->codec->sample_rate = avio_rb16(pb);
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avio_rb32(pb);
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st->codec->channels = avio_rb16(pb);
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if (version == 5) {
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avio_rb32(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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get_str8(pb, buf, sizeof(buf)); /* desc */
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get_str8(pb, buf, sizeof(buf)); /* desc */
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}
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_tag = AV_RL32(buf);
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st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
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st->codec->codec_tag);
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switch (st->codec->codec_id) {
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case CODEC_ID_AC3:
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st->need_parsing = AVSTREAM_PARSE_FULL;
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break;
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case CODEC_ID_RA_288:
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st->codec->extradata_size= 0;
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ast->audio_framesize = st->codec->block_align;
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st->codec->block_align = coded_framesize;
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if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
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av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
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return -1;
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}
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av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
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break;
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case CODEC_ID_COOK:
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case CODEC_ID_ATRAC3:
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case CODEC_ID_SIPR:
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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(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
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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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ast->audio_framesize = st->codec->block_align;
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if (st->codec->codec_id == 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->codec->block_align = ff_sipr_subpk_size[flavor];
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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->codec->block_align = ast->sub_packet_size;
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}
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if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
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return ret;
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if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
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av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
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return -1;
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}
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av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
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break;
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case 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(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
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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(pb, st->codec, codecdata_length - 1)) < 0)
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return ret;
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}
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break;
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default:
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av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
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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, 0);
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}
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}
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return 0;
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}
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int
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ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
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AVStream *st, RMStream *rst, int codec_data_size)
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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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av_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 {
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int fps, fps2;
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if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
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fail1:
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av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
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goto skip;
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}
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st->codec->codec_tag = avio_rl32(pb);
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st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
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st->codec->codec_tag);
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// av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
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if (st->codec->codec_id == CODEC_ID_NONE)
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goto fail1;
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st->codec->width = avio_rb16(pb);
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st->codec->height = avio_rb16(pb);
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st->codec->time_base.num= 1;
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fps= avio_rb16(pb);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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avio_rb32(pb);
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fps2= avio_rb16(pb);
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avio_rb16(pb);
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if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
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return ret;
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// av_log(s, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
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st->codec->time_base.den = fps * st->codec->time_base.num;
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//XXX: do we really need that?
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switch(st->codec->extradata[4]>>4){
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case 1: st->codec->codec_id = CODEC_ID_RV10; break;
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case 2: st->codec->codec_id = CODEC_ID_RV20; break;
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case 3: st->codec->codec_id = CODEC_ID_RV30; break;
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case 4: st->codec->codec_id = CODEC_ID_RV40; break;
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default:
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av_log(st->codec, AV_LOG_ERROR, "extra:%02X %02X %02X %02X %02X\n", st->codec->extradata[0], st->codec->extradata[1], st->codec->extradata[2], st->codec->extradata[3], st->codec->extradata[4]);
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goto fail1;
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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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avio_skip(pb, codec_data_size - size);
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return 0;
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}
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/** this function assumes that the demuxer has already seeked to the start
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* of the INDX chunk, and will bail out if not. */
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static int rm_read_index(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
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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);
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if (size < 20)
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return -1;
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avio_skip(pb, 2);
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n_pkts = avio_rb32(pb);
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str_id = avio_rb16(pb);
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next_off = avio_rb32(pb);
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for (n = 0; n < s->nb_streams; n++)
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if (s->streams[n]->id == str_id) {
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st = s->streams[n];
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break;
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}
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if (n == s->nb_streams)
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goto skip;
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for (n = 0; n < n_pkts; n++) {
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avio_skip(pb, 2);
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pts = avio_rb32(pb);
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pos = avio_rb32(pb);
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avio_skip(pb, 4); /* packet no. */
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av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
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}
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skip:
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if (next_off && avio_tell(pb) != next_off &&
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avio_seek(pb, next_off, SEEK_SET) < 0)
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return -1;
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} while (next_off);
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return 0;
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}
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static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
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{
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RMDemuxContext *rm = s->priv_data;
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AVStream *st;
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rm->old_format = 1;
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st = av_new_stream(s, 0);
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if (!st)
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return -1;
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st->priv_data = ff_rm_alloc_rmstream();
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return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
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}
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static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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RMDemuxContext *rm = s->priv_data;
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AVStream *st;
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AVIOContext *pb = s->pb;
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unsigned int tag;
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int tag_size;
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unsigned int start_time, duration;
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unsigned int data_off = 0, indx_off = 0;
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char buf[128];
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int flags = 0;
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tag = avio_rl32(pb);
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if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
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/* very old .ra format */
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return rm_read_header_old(s, ap);
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} else if (tag != MKTAG('.', 'R', 'M', 'F')) {
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return AVERROR(EIO);
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}
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avio_rb32(pb); /* header size */
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avio_rb16(pb);
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avio_rb32(pb);
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avio_rb32(pb); /* number of headers */
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for(;;) {
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if (pb->eof_reached)
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return -1;
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tag = avio_rl32(pb);
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tag_size = avio_rb32(pb);
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avio_rb16(pb);
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#if 0
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printf("tag=%c%c%c%c (%08x) size=%d\n",
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(tag) & 0xff,
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(tag >> 8) & 0xff,
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(tag >> 16) & 0xff,
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(tag >> 24) & 0xff,
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tag,
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tag_size);
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#endif
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if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
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return -1;
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switch(tag) {
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case MKTAG('P', 'R', 'O', 'P'):
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/* file header */
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avio_rb32(pb); /* max bit rate */
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avio_rb32(pb); /* avg bit rate */
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avio_rb32(pb); /* max packet size */
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avio_rb32(pb); /* avg packet size */
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avio_rb32(pb); /* nb packets */
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avio_rb32(pb); /* duration */
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avio_rb32(pb); /* preroll */
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indx_off = avio_rb32(pb); /* index offset */
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data_off = avio_rb32(pb); /* data offset */
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avio_rb16(pb); /* nb streams */
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flags = avio_rb16(pb); /* flags */
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break;
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case MKTAG('C', 'O', 'N', 'T'):
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rm_read_metadata(s, 1);
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break;
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case MKTAG('M', 'D', 'P', 'R'):
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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st->id = avio_rb16(pb);
|
|
avio_rb32(pb); /* max bit rate */
|
|
st->codec->bit_rate = avio_rb32(pb); /* bit rate */
|
|
avio_rb32(pb); /* max packet size */
|
|
avio_rb32(pb); /* avg packet size */
|
|
start_time = avio_rb32(pb); /* start time */
|
|
avio_rb32(pb); /* preroll */
|
|
duration = avio_rb32(pb); /* duration */
|
|
st->start_time = start_time;
|
|
st->duration = duration;
|
|
get_str8(pb, buf, sizeof(buf)); /* desc */
|
|
get_str8(pb, buf, sizeof(buf)); /* mimetype */
|
|
st->codec->codec_type = AVMEDIA_TYPE_DATA;
|
|
st->priv_data = ff_rm_alloc_rmstream();
|
|
if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
|
|
avio_rb32(pb)) < 0)
|
|
return -1;
|
|
break;
|
|
case MKTAG('D', 'A', 'T', 'A'):
|
|
goto header_end;
|
|
default:
|
|
/* unknown tag: skip it */
|
|
avio_skip(pb, tag_size - 10);
|
|
break;
|
|
}
|
|
}
|
|
header_end:
|
|
rm->nb_packets = avio_rb32(pb); /* number of packets */
|
|
if (!rm->nb_packets && (flags & 4))
|
|
rm->nb_packets = 3600 * 25;
|
|
avio_rb32(pb); /* next data header */
|
|
|
|
if (!data_off)
|
|
data_off = avio_tell(pb) - 18;
|
|
if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
|
|
avio_seek(pb, indx_off, SEEK_SET) >= 0) {
|
|
rm_read_index(s);
|
|
avio_seek(pb, data_off + 18, SEEK_SET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_num(AVIOContext *pb, int *len)
|
|
{
|
|
int n, n1;
|
|
|
|
n = avio_rb16(pb);
|
|
(*len)-=2;
|
|
n &= 0x7FFF;
|
|
if (n >= 0x4000) {
|
|
return n - 0x4000;
|
|
} else {
|
|
n1 = avio_rb16(pb);
|
|
(*len)-=2;
|
|
return (n << 16) | n1;
|
|
}
|
|
}
|
|
|
|
/* multiple of 20 bytes for ra144 (ugly) */
|
|
#define RAW_PACKET_SIZE 1000
|
|
|
|
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
|
|
RMDemuxContext *rm = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
uint32_t state=0xFFFFFFFF;
|
|
|
|
while(!pb->eof_reached){
|
|
int len, num, i;
|
|
*pos= avio_tell(pb) - 3;
|
|
if(rm->remaining_len > 0){
|
|
num= rm->current_stream;
|
|
len= rm->remaining_len;
|
|
*timestamp = AV_NOPTS_VALUE;
|
|
*flags= 0;
|
|
}else{
|
|
state= (state<<8) + avio_r8(pb);
|
|
|
|
if(state == MKBETAG('I', 'N', 'D', 'X')){
|
|
int n_pkts, expected_len;
|
|
len = avio_rb32(pb);
|
|
avio_skip(pb, 2);
|
|
n_pkts = avio_rb32(pb);
|
|
expected_len = 20 + n_pkts * 14;
|
|
if (len == 20)
|
|
/* some files don't add index entries to chunk size... */
|
|
len = expected_len;
|
|
else if (len != expected_len)
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Index size %d (%d pkts) is wrong, should be %d.\n",
|
|
len, n_pkts, expected_len);
|
|
len -= 14; // we already read part of the index header
|
|
if(len<0)
|
|
continue;
|
|
goto skip;
|
|
} else if (state == MKBETAG('D','A','T','A')) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"DATA tag in middle of chunk, file may be broken.\n");
|
|
}
|
|
|
|
if(state > (unsigned)0xFFFF || state <= 12)
|
|
continue;
|
|
len=state - 12;
|
|
state= 0xFFFFFFFF;
|
|
|
|
num = avio_rb16(pb);
|
|
*timestamp = avio_rb32(pb);
|
|
avio_r8(pb); /* reserved */
|
|
*flags = avio_r8(pb); /* flags */
|
|
}
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
st = s->streams[i];
|
|
if (num == st->id)
|
|
break;
|
|
}
|
|
if (i == s->nb_streams) {
|
|
skip:
|
|
/* skip packet if unknown number */
|
|
avio_skip(pb, len);
|
|
rm->remaining_len = 0;
|
|
continue;
|
|
}
|
|
*stream_index= i;
|
|
|
|
return len;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
|
|
RMDemuxContext *rm, RMStream *vst,
|
|
AVPacket *pkt, int len, int *pseq)
|
|
{
|
|
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;
|
|
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))
|
|
return -1; //got partial frame
|
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
if ((st->codec->codec_id == CODEC_ID_RA_288) ||
|
|
(st->codec->codec_id == CODEC_ID_COOK) ||
|
|
(st->codec->codec_id == CODEC_ID_ATRAC3) ||
|
|
(st->codec->codec_id == CODEC_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(st->codec->codec_id) {
|
|
case CODEC_ID_RA_288:
|
|
for (x = 0; x < h/2; x++)
|
|
avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
|
|
break;
|
|
case CODEC_ID_ATRAC3:
|
|
case CODEC_ID_COOK:
|
|
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 CODEC_ID_SIPR:
|
|
avio_read(pb, ast->pkt.data + y * w, w);
|
|
break;
|
|
}
|
|
|
|
if (++(ast->sub_packet_cnt) < h)
|
|
return -1;
|
|
if (st->codec->codec_id == CODEC_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 (st->codec->codec_id == CODEC_ID_AAC) {
|
|
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 (st->codec->codec_id == CODEC_ID_AAC)
|
|
av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
|
|
else {
|
|
av_new_packet(pkt, st->codec->block_align);
|
|
memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
|
|
(ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
|
|
st->codec->block_align);
|
|
}
|
|
rm->audio_pkt_cnt--;
|
|
if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
|
|
ast->audiotimestamp = AV_NOPTS_VALUE;
|
|
pkt->flags = AV_PKT_FLAG_KEY;
|
|
} else
|
|
pkt->flags = 0;
|
|
pkt->stream_index = st->index;
|
|
|
|
return rm->audio_pkt_cnt;
|
|
}
|
|
|
|
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
RMDemuxContext *rm = s->priv_data;
|
|
AVStream *st;
|
|
int i, len, res, seq = 1;
|
|
int64_t timestamp, pos;
|
|
int flags;
|
|
|
|
for (;;) {
|
|
if (rm->audio_pkt_cnt) {
|
|
// If there are queued audio packet return them first
|
|
st = s->streams[rm->audio_stream_num];
|
|
ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
|
|
flags = 0;
|
|
} else {
|
|
if (rm->old_format) {
|
|
RMStream *ast;
|
|
|
|
st = s->streams[0];
|
|
ast = st->priv_data;
|
|
timestamp = AV_NOPTS_VALUE;
|
|
len = !ast->audio_framesize ? RAW_PACKET_SIZE :
|
|
ast->coded_framesize * ast->sub_packet_h / 2;
|
|
flags = (seq++ == 1) ? 2 : 0;
|
|
pos = avio_tell(s->pb);
|
|
} else {
|
|
len=sync(s, ×tamp, &flags, &i, &pos);
|
|
if (len > 0)
|
|
st = s->streams[i];
|
|
}
|
|
|
|
if(len<0 || s->pb->eof_reached)
|
|
return AVERROR(EIO);
|
|
|
|
res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
|
|
&seq, flags, timestamp);
|
|
if((flags&2) && (seq&0x7F) == 1)
|
|
av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
|
|
if (res)
|
|
continue;
|
|
}
|
|
|
|
if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
|
|
|| st->discard >= AVDISCARD_ALL){
|
|
av_free_packet(pkt);
|
|
} else
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rm_read_close(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<s->nb_streams;i++)
|
|
ff_rm_free_rmstream(s->streams[i]->priv_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rm_probe(AVProbeData *p)
|
|
{
|
|
/* check file header */
|
|
if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
|
|
p->buf[2] == 'M' && p->buf[3] == 'F' &&
|
|
p->buf[4] == 0 && p->buf[5] == 0) ||
|
|
(p->buf[0] == '.' && p->buf[1] == 'r' &&
|
|
p->buf[2] == 'a' && p->buf[3] == 0xfd))
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
|
|
int64_t *ppos, int64_t pos_limit)
|
|
{
|
|
RMDemuxContext *rm = s->priv_data;
|
|
int64_t pos, dts;
|
|
int stream_index2, flags, len, h;
|
|
|
|
pos = *ppos;
|
|
|
|
if(rm->old_format)
|
|
return AV_NOPTS_VALUE;
|
|
|
|
avio_seek(s->pb, pos, SEEK_SET);
|
|
rm->remaining_len=0;
|
|
for(;;){
|
|
int seq=1;
|
|
AVStream *st;
|
|
|
|
len=sync(s, &dts, &flags, &stream_index2, &pos);
|
|
if(len<0)
|
|
return AV_NOPTS_VALUE;
|
|
|
|
st = s->streams[stream_index2];
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
h= avio_r8(s->pb); len--;
|
|
if(!(h & 0x40)){
|
|
seq = avio_r8(s->pb); len--;
|
|
}
|
|
}
|
|
|
|
if((flags&2) && (seq&0x7F) == 1){
|
|
// av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
|
|
av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
|
|
if(stream_index2 == stream_index)
|
|
break;
|
|
}
|
|
|
|
avio_skip(s->pb, len);
|
|
}
|
|
*ppos = pos;
|
|
return dts;
|
|
}
|
|
|
|
AVInputFormat ff_rm_demuxer = {
|
|
"rm",
|
|
NULL_IF_CONFIG_SMALL("RealMedia format"),
|
|
sizeof(RMDemuxContext),
|
|
rm_probe,
|
|
rm_read_header,
|
|
rm_read_packet,
|
|
rm_read_close,
|
|
NULL,
|
|
rm_read_dts,
|
|
};
|
|
|
|
AVInputFormat ff_rdt_demuxer = {
|
|
"rdt",
|
|
NULL_IF_CONFIG_SMALL("RDT demuxer"),
|
|
sizeof(RMDemuxContext),
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
rm_read_close,
|
|
};
|