mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
1304 lines
47 KiB
C
1304 lines
47 KiB
C
/*
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* ASF 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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//#define DEBUG
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#include "libavutil/bswap.h"
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#include "libavutil/common.h"
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#include "libavutil/avstring.h"
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#include "libavutil/dict.h"
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#include "libavutil/mathematics.h"
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#include "libavcodec/mpegaudio.h"
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#include "avformat.h"
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#include "internal.h"
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#include "avio_internal.h"
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#include "riff.h"
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#include "asf.h"
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#include "asfcrypt.h"
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#include "avlanguage.h"
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typedef struct {
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int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
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ASFStream streams[128]; ///< it's max number and it's not that big
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uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
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AVRational dar[128];
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char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
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/* non streamed additonnal info */
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/* packet filling */
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int packet_size_left;
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/* only for reading */
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uint64_t data_offset; ///< beginning of the first data packet
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uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
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uint64_t data_object_size; ///< size of the data object
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int index_read;
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ASFMainHeader hdr;
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int packet_flags;
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int packet_property;
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int packet_timestamp;
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int packet_segsizetype;
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int packet_segments;
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int packet_seq;
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int packet_replic_size;
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int packet_key_frame;
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int packet_padsize;
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unsigned int packet_frag_offset;
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unsigned int packet_frag_size;
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int64_t packet_frag_timestamp;
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int packet_multi_size;
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int packet_obj_size;
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int packet_time_delta;
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int packet_time_start;
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int64_t packet_pos;
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int stream_index;
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ASFStream* asf_st; ///< currently decoded stream
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} ASFContext;
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#undef NDEBUG
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#include <assert.h>
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#define ASF_MAX_STREAMS 127
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#define FRAME_HEADER_SIZE 17
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// Fix Me! FRAME_HEADER_SIZE may be different.
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static const ff_asf_guid index_guid = {
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0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
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};
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#ifdef DEBUG
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static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
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0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
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};
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#define PRINT_IF_GUID(g,cmp) \
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if (!ff_guidcmp(g, &cmp)) \
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av_dlog(NULL, "(GUID: %s) ", #cmp)
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static void print_guid(const ff_asf_guid *g)
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{
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int i;
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PRINT_IF_GUID(g, ff_asf_header);
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else PRINT_IF_GUID(g, ff_asf_file_header);
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else PRINT_IF_GUID(g, ff_asf_stream_header);
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else PRINT_IF_GUID(g, ff_asf_audio_stream);
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else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
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else PRINT_IF_GUID(g, ff_asf_video_stream);
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else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
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else PRINT_IF_GUID(g, ff_asf_command_stream);
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else PRINT_IF_GUID(g, ff_asf_comment_header);
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else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
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else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
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else PRINT_IF_GUID(g, ff_asf_data_header);
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else PRINT_IF_GUID(g, index_guid);
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else PRINT_IF_GUID(g, ff_asf_head1_guid);
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else PRINT_IF_GUID(g, ff_asf_head2_guid);
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else PRINT_IF_GUID(g, ff_asf_my_guid);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
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else PRINT_IF_GUID(g, ff_asf_extended_content_header);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
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else PRINT_IF_GUID(g, ff_asf_metadata_header);
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else PRINT_IF_GUID(g, ff_asf_marker_header);
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else PRINT_IF_GUID(g, stream_bitrate_guid);
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else PRINT_IF_GUID(g, ff_asf_language_guid);
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else
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av_dlog(NULL, "(GUID: unknown) ");
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for(i=0;i<16;i++)
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av_dlog(NULL, " 0x%02x,", (*g)[i]);
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av_dlog(NULL, "}\n");
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}
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#undef PRINT_IF_GUID
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#else
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#define print_guid(g)
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#endif
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void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
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{
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assert(sizeof(*g) == 16);
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avio_read(s, *g, sizeof(*g));
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}
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static int asf_probe(AVProbeData *pd)
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{
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/* check file header */
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if (!ff_guidcmp(pd->buf, &ff_asf_header))
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return AVPROBE_SCORE_MAX;
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else
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return 0;
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}
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static int get_value(AVIOContext *pb, int type){
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switch(type){
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case 2: return avio_rl32(pb);
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case 3: return avio_rl32(pb);
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case 4: return avio_rl64(pb);
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case 5: return avio_rl16(pb);
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default:return INT_MIN;
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}
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}
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static void get_tag(AVFormatContext *s, const char *key, int type, int len)
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{
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char *value;
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int64_t off = avio_tell(s->pb);
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if ((unsigned)len >= (UINT_MAX - 1)/2)
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return;
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value = av_malloc(2*len+1);
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if (!value)
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goto finish;
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if (type == 0) { // UTF16-LE
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avio_get_str16le(s->pb, len, value, 2*len + 1);
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} else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
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uint64_t num = get_value(s->pb, type);
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snprintf(value, len, "%"PRIu64, num);
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} else {
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av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
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goto finish;
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}
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if (*value)
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av_dict_set(&s->metadata, key, value, 0);
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finish:
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av_freep(&value);
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avio_seek(s->pb, off + len, SEEK_SET);
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}
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static int asf_read_file_properties(AVFormatContext *s, int64_t size)
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{
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ASFContext *asf = s->priv_data;
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AVIOContext *pb = s->pb;
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ff_get_guid(pb, &asf->hdr.guid);
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asf->hdr.file_size = avio_rl64(pb);
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asf->hdr.create_time = avio_rl64(pb);
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avio_rl64(pb); /* number of packets */
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asf->hdr.play_time = avio_rl64(pb);
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asf->hdr.send_time = avio_rl64(pb);
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asf->hdr.preroll = avio_rl32(pb);
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asf->hdr.ignore = avio_rl32(pb);
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asf->hdr.flags = avio_rl32(pb);
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asf->hdr.min_pktsize = avio_rl32(pb);
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asf->hdr.max_pktsize = avio_rl32(pb);
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asf->hdr.max_bitrate = avio_rl32(pb);
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s->packet_size = asf->hdr.max_pktsize;
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return 0;
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}
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static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
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{
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ASFContext *asf = s->priv_data;
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AVIOContext *pb = s->pb;
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AVStream *st;
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ASFStream *asf_st;
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ff_asf_guid g;
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enum AVMediaType type;
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int type_specific_size, sizeX;
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unsigned int tag1;
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int64_t pos1, pos2, start_time;
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int test_for_ext_stream_audio, is_dvr_ms_audio=0;
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if (s->nb_streams == ASF_MAX_STREAMS) {
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av_log(s, AV_LOG_ERROR, "too many streams\n");
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return AVERROR(EINVAL);
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}
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pos1 = avio_tell(pb);
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
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asf_st = av_mallocz(sizeof(ASFStream));
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if (!asf_st)
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return AVERROR(ENOMEM);
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st->priv_data = asf_st;
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st->start_time = 0;
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start_time = asf->hdr.preroll;
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asf_st->stream_language_index = 128; // invalid stream index means no language info
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if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
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st->duration = asf->hdr.play_time /
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(10000000 / 1000) - start_time;
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}
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ff_get_guid(pb, &g);
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test_for_ext_stream_audio = 0;
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if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
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type = AVMEDIA_TYPE_AUDIO;
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} else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
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type = AVMEDIA_TYPE_VIDEO;
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} else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
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type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = CODEC_ID_MJPEG;
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} else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
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type = AVMEDIA_TYPE_DATA;
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} else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
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test_for_ext_stream_audio = 1;
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type = AVMEDIA_TYPE_UNKNOWN;
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} else {
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return -1;
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}
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ff_get_guid(pb, &g);
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avio_skip(pb, 8); /* total_size */
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type_specific_size = avio_rl32(pb);
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avio_rl32(pb);
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st->id = avio_rl16(pb) & 0x7f; /* stream id */
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// mapping of asf ID to AV stream ID;
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asf->asfid2avid[st->id] = s->nb_streams - 1;
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avio_rl32(pb);
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if (test_for_ext_stream_audio) {
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ff_get_guid(pb, &g);
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if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
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type = AVMEDIA_TYPE_AUDIO;
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is_dvr_ms_audio=1;
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ff_get_guid(pb, &g);
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avio_rl32(pb);
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avio_rl32(pb);
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avio_rl32(pb);
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ff_get_guid(pb, &g);
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avio_rl32(pb);
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}
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}
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st->codec->codec_type = type;
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if (type == AVMEDIA_TYPE_AUDIO) {
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int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
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if (ret < 0)
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return ret;
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if (is_dvr_ms_audio) {
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// codec_id and codec_tag are unreliable in dvr_ms
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// files. Set them later by probing stream.
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st->codec->codec_id = CODEC_ID_PROBE;
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st->codec->codec_tag = 0;
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}
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if (st->codec->codec_id == CODEC_ID_AAC) {
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st->need_parsing = AVSTREAM_PARSE_NONE;
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} else {
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st->need_parsing = AVSTREAM_PARSE_FULL;
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}
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/* We have to init the frame size at some point .... */
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pos2 = avio_tell(pb);
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if (size >= (pos2 + 8 - pos1 + 24)) {
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asf_st->ds_span = avio_r8(pb);
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asf_st->ds_packet_size = avio_rl16(pb);
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asf_st->ds_chunk_size = avio_rl16(pb);
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avio_rl16(pb); //ds_data_size
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avio_r8(pb); //ds_silence_data
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}
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//printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
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// asf_st->ds_packet_size, asf_st->ds_chunk_size,
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// asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
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if (asf_st->ds_span > 1) {
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if (!asf_st->ds_chunk_size
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|| (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
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|| asf_st->ds_packet_size % asf_st->ds_chunk_size)
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asf_st->ds_span = 0; // disable descrambling
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}
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switch (st->codec->codec_id) {
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case CODEC_ID_MP3:
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st->codec->frame_size = MPA_FRAME_SIZE;
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break;
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case CODEC_ID_PCM_S16LE:
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case CODEC_ID_PCM_S16BE:
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case CODEC_ID_PCM_U16LE:
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case CODEC_ID_PCM_U16BE:
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case CODEC_ID_PCM_S8:
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_ALAW:
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case CODEC_ID_PCM_MULAW:
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st->codec->frame_size = 1;
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break;
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default:
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/* This is probably wrong, but it prevents a crash later */
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st->codec->frame_size = 1;
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break;
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}
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} else if (type == AVMEDIA_TYPE_VIDEO &&
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size - (avio_tell(pb) - pos1 + 24) >= 51) {
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avio_rl32(pb);
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avio_rl32(pb);
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avio_r8(pb);
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avio_rl16(pb); /* size */
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sizeX= avio_rl32(pb); /* size */
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st->codec->width = avio_rl32(pb);
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st->codec->height = avio_rl32(pb);
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/* not available for asf */
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avio_rl16(pb); /* panes */
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st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
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tag1 = avio_rl32(pb);
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avio_skip(pb, 20);
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// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
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if (sizeX > 40) {
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st->codec->extradata_size = sizeX - 40;
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st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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avio_read(pb, st->codec->extradata, st->codec->extradata_size);
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}
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/* Extract palette from extradata if bpp <= 8 */
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/* This code assumes that extradata contains only palette */
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/* This is true for all paletted codecs implemented in libavcodec */
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if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
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#if HAVE_BIGENDIAN
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int i;
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for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
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asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
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#else
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memcpy(asf_st->palette, st->codec->extradata,
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FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
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#endif
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asf_st->palette_changed = 1;
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}
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st->codec->codec_tag = tag1;
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st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
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if(tag1 == MKTAG('D', 'V', 'R', ' ')){
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st->need_parsing = AVSTREAM_PARSE_FULL;
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// issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
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st->codec->width =
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st->codec->height = 0;
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av_freep(&st->codec->extradata);
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st->codec->extradata_size=0;
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}
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if(st->codec->codec_id == CODEC_ID_H264)
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st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
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}
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pos2 = avio_tell(pb);
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avio_skip(pb, size - (pos2 - pos1 + 24));
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return 0;
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}
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static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
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{
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ASFContext *asf = s->priv_data;
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AVIOContext *pb = s->pb;
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ff_asf_guid g;
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int ext_len, payload_ext_ct, stream_ct, i;
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uint32_t leak_rate, stream_num;
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unsigned int stream_languageid_index;
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avio_rl64(pb); // starttime
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avio_rl64(pb); // endtime
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leak_rate = avio_rl32(pb); // leak-datarate
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avio_rl32(pb); // bucket-datasize
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avio_rl32(pb); // init-bucket-fullness
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avio_rl32(pb); // alt-leak-datarate
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avio_rl32(pb); // alt-bucket-datasize
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avio_rl32(pb); // alt-init-bucket-fullness
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avio_rl32(pb); // max-object-size
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avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
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stream_num = avio_rl16(pb); // stream-num
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stream_languageid_index = avio_rl16(pb); // stream-language-id-index
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if (stream_num < 128)
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asf->streams[stream_num].stream_language_index = stream_languageid_index;
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avio_rl64(pb); // avg frametime in 100ns units
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stream_ct = avio_rl16(pb); //stream-name-count
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payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
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|
|
|
if (stream_num < 128)
|
|
asf->stream_bitrates[stream_num] = leak_rate;
|
|
|
|
for (i=0; i<stream_ct; i++){
|
|
avio_rl16(pb);
|
|
ext_len = avio_rl16(pb);
|
|
avio_skip(pb, ext_len);
|
|
}
|
|
|
|
for (i=0; i<payload_ext_ct; i++){
|
|
ff_get_guid(pb, &g);
|
|
avio_skip(pb, 2);
|
|
ext_len=avio_rl32(pb);
|
|
avio_skip(pb, ext_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_content_desc(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
int len1, len2, len3, len4, len5;
|
|
|
|
len1 = avio_rl16(pb);
|
|
len2 = avio_rl16(pb);
|
|
len3 = avio_rl16(pb);
|
|
len4 = avio_rl16(pb);
|
|
len5 = avio_rl16(pb);
|
|
get_tag(s, "title" , 0, len1);
|
|
get_tag(s, "author" , 0, len2);
|
|
get_tag(s, "copyright", 0, len3);
|
|
get_tag(s, "comment" , 0, len4);
|
|
avio_skip(pb, len5);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
ASFContext *asf = s->priv_data;
|
|
int desc_count, i, ret;
|
|
|
|
desc_count = avio_rl16(pb);
|
|
for(i=0;i<desc_count;i++) {
|
|
int name_len,value_type,value_len;
|
|
char name[1024];
|
|
|
|
name_len = avio_rl16(pb);
|
|
if (name_len%2) // must be even, broken lavf versions wrote len-1
|
|
name_len += 1;
|
|
if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
|
|
avio_skip(pb, name_len - ret);
|
|
value_type = avio_rl16(pb);
|
|
value_len = avio_rl16(pb);
|
|
if (!value_type && value_len%2)
|
|
value_len += 1;
|
|
/**
|
|
* My sample has that stream set to 0 maybe that mean the container.
|
|
* Asf stream count start at 1. I am using 0 to the container value since it's unused
|
|
*/
|
|
if (!strcmp(name, "AspectRatioX")){
|
|
asf->dar[0].num= get_value(s->pb, value_type);
|
|
} else if(!strcmp(name, "AspectRatioY")){
|
|
asf->dar[0].den= get_value(s->pb, value_type);
|
|
} else
|
|
get_tag(s, name, value_type, value_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_language_list(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
ASFContext *asf = s->priv_data;
|
|
int j, ret;
|
|
int stream_count = avio_rl16(pb);
|
|
for(j = 0; j < stream_count; j++) {
|
|
char lang[6];
|
|
unsigned int lang_len = avio_r8(pb);
|
|
if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
|
|
avio_skip(pb, lang_len - ret);
|
|
if (j < 128)
|
|
av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_metadata(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
ASFContext *asf = s->priv_data;
|
|
int n, stream_num, name_len, value_len, value_num;
|
|
int ret, i;
|
|
n = avio_rl16(pb);
|
|
|
|
for(i=0;i<n;i++) {
|
|
char name[1024];
|
|
|
|
avio_rl16(pb); //lang_list_index
|
|
stream_num= avio_rl16(pb);
|
|
name_len= avio_rl16(pb);
|
|
avio_skip(pb, 2); /* value_type */
|
|
value_len= avio_rl32(pb);
|
|
|
|
if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
|
|
avio_skip(pb, name_len - ret);
|
|
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
|
|
value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
|
|
avio_skip(pb, value_len - 2);
|
|
|
|
if(stream_num<128){
|
|
if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
|
|
else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_marker(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
int i, count, name_len, ret;
|
|
char name[1024];
|
|
|
|
avio_rl64(pb); // reserved 16 bytes
|
|
avio_rl64(pb); // ...
|
|
count = avio_rl32(pb); // markers count
|
|
avio_rl16(pb); // reserved 2 bytes
|
|
name_len = avio_rl16(pb); // name length
|
|
for(i=0;i<name_len;i++){
|
|
avio_r8(pb); // skip the name
|
|
}
|
|
|
|
for(i=0;i<count;i++){
|
|
int64_t pres_time;
|
|
int name_len;
|
|
|
|
avio_rl64(pb); // offset, 8 bytes
|
|
pres_time = avio_rl64(pb); // presentation time
|
|
avio_rl16(pb); // entry length
|
|
avio_rl32(pb); // send time
|
|
avio_rl32(pb); // flags
|
|
name_len = avio_rl32(pb); // name length
|
|
if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
|
|
avio_skip(pb, name_len - ret);
|
|
avpriv_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ff_asf_guid g;
|
|
AVIOContext *pb = s->pb;
|
|
int i;
|
|
int64_t gsize;
|
|
|
|
ff_get_guid(pb, &g);
|
|
if (ff_guidcmp(&g, &ff_asf_header))
|
|
return -1;
|
|
avio_rl64(pb);
|
|
avio_rl32(pb);
|
|
avio_r8(pb);
|
|
avio_r8(pb);
|
|
memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
|
|
for(;;) {
|
|
uint64_t gpos= avio_tell(pb);
|
|
ff_get_guid(pb, &g);
|
|
gsize = avio_rl64(pb);
|
|
av_dlog(s, "%08"PRIx64": ", gpos);
|
|
print_guid(&g);
|
|
av_dlog(s, " size=0x%"PRIx64"\n", gsize);
|
|
if (!ff_guidcmp(&g, &ff_asf_data_header)) {
|
|
asf->data_object_offset = avio_tell(pb);
|
|
// if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
|
|
if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
|
|
asf->data_object_size = gsize - 24;
|
|
} else {
|
|
asf->data_object_size = (uint64_t)-1;
|
|
}
|
|
break;
|
|
}
|
|
if (gsize < 24)
|
|
return -1;
|
|
if (!ff_guidcmp(&g, &ff_asf_file_header)) {
|
|
asf_read_file_properties(s, gsize);
|
|
} else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
|
|
asf_read_stream_properties(s, gsize);
|
|
} else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
|
|
asf_read_content_desc(s, gsize);
|
|
} else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
|
|
asf_read_language_list(s, gsize);
|
|
} else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
|
|
asf_read_ext_content_desc(s, gsize);
|
|
} else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
|
|
asf_read_metadata(s, gsize);
|
|
} else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
|
|
asf_read_ext_stream_properties(s, gsize);
|
|
|
|
// there could be a optional stream properties object to follow
|
|
// if so the next iteration will pick it up
|
|
continue;
|
|
} else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
|
|
ff_get_guid(pb, &g);
|
|
avio_skip(pb, 6);
|
|
continue;
|
|
} else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
|
|
asf_read_marker(s, gsize);
|
|
} else if (pb->eof_reached) {
|
|
return -1;
|
|
} else {
|
|
if (!s->keylen) {
|
|
if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
|
|
av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
|
|
} else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
|
|
av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
|
|
} else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
|
|
av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
|
|
}
|
|
}
|
|
}
|
|
if(avio_tell(pb) != gpos + gsize)
|
|
av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
|
|
avio_seek(pb, gpos + gsize, SEEK_SET);
|
|
}
|
|
ff_get_guid(pb, &g);
|
|
avio_rl64(pb);
|
|
avio_r8(pb);
|
|
avio_r8(pb);
|
|
if (pb->eof_reached)
|
|
return -1;
|
|
asf->data_offset = avio_tell(pb);
|
|
asf->packet_size_left = 0;
|
|
|
|
|
|
for(i=0; i<128; i++){
|
|
int stream_num= asf->asfid2avid[i];
|
|
if(stream_num>=0){
|
|
AVStream *st = s->streams[stream_num];
|
|
if (!st->codec->bit_rate)
|
|
st->codec->bit_rate = asf->stream_bitrates[i];
|
|
if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
|
|
av_reduce(&st->sample_aspect_ratio.num,
|
|
&st->sample_aspect_ratio.den,
|
|
asf->dar[i].num, asf->dar[i].den, INT_MAX);
|
|
} else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
|
|
av_reduce(&st->sample_aspect_ratio.num,
|
|
&st->sample_aspect_ratio.den,
|
|
asf->dar[0].num, asf->dar[0].den, INT_MAX);
|
|
|
|
//av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
|
|
|
|
// copy and convert language codes to the frontend
|
|
if (asf->streams[i].stream_language_index < 128) {
|
|
const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
|
|
if (rfc1766 && strlen(rfc1766) > 1) {
|
|
const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
|
|
const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
|
|
if (iso6392)
|
|
av_dict_set(&st->metadata, "language", iso6392, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define DO_2BITS(bits, var, defval) \
|
|
switch (bits & 3) \
|
|
{ \
|
|
case 3: var = avio_rl32(pb); rsize += 4; break; \
|
|
case 2: var = avio_rl16(pb); rsize += 2; break; \
|
|
case 1: var = avio_r8(pb); rsize++; break; \
|
|
default: var = defval; break; \
|
|
}
|
|
|
|
/**
|
|
* Load a single ASF packet into the demuxer.
|
|
* @param s demux context
|
|
* @param pb context to read data from
|
|
* @return 0 on success, <0 on error
|
|
*/
|
|
static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
uint32_t packet_length, padsize;
|
|
int rsize = 8;
|
|
int c, d, e, off;
|
|
|
|
// if we do not know packet size, allow skipping up to 32 kB
|
|
off= 32768;
|
|
if (s->packet_size > 0)
|
|
off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
|
|
|
|
c=d=e=-1;
|
|
while(off-- > 0){
|
|
c=d; d=e;
|
|
e= avio_r8(pb);
|
|
if(c == 0x82 && !d && !e)
|
|
break;
|
|
}
|
|
|
|
if (c != 0x82) {
|
|
/**
|
|
* This code allows handling of -EAGAIN at packet boundaries (i.e.
|
|
* if the packet sync code above triggers -EAGAIN). This does not
|
|
* imply complete -EAGAIN handling support at random positions in
|
|
* the stream.
|
|
*/
|
|
if (pb->error == AVERROR(EAGAIN))
|
|
return AVERROR(EAGAIN);
|
|
if (!pb->eof_reached)
|
|
av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
|
|
}
|
|
if ((c & 0x8f) == 0x82) {
|
|
if (d || e) {
|
|
if (!pb->eof_reached)
|
|
av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
|
|
return -1;
|
|
}
|
|
c= avio_r8(pb);
|
|
d= avio_r8(pb);
|
|
rsize+=3;
|
|
}else{
|
|
avio_seek(pb, -1, SEEK_CUR); //FIXME
|
|
}
|
|
|
|
asf->packet_flags = c;
|
|
asf->packet_property = d;
|
|
|
|
DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
|
|
DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
|
|
DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
|
|
|
|
//the following checks prevent overflows and infinite loops
|
|
if(!packet_length || packet_length >= (1U<<29)){
|
|
av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
|
|
return -1;
|
|
}
|
|
if(padsize >= packet_length){
|
|
av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
|
|
return -1;
|
|
}
|
|
|
|
asf->packet_timestamp = avio_rl32(pb);
|
|
avio_rl16(pb); /* duration */
|
|
// rsize has at least 11 bytes which have to be present
|
|
|
|
if (asf->packet_flags & 0x01) {
|
|
asf->packet_segsizetype = avio_r8(pb); rsize++;
|
|
asf->packet_segments = asf->packet_segsizetype & 0x3f;
|
|
} else {
|
|
asf->packet_segments = 1;
|
|
asf->packet_segsizetype = 0x80;
|
|
}
|
|
asf->packet_size_left = packet_length - padsize - rsize;
|
|
if (packet_length < asf->hdr.min_pktsize)
|
|
padsize += asf->hdr.min_pktsize - packet_length;
|
|
asf->packet_padsize = padsize;
|
|
av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @return <0 if error
|
|
*/
|
|
static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
|
|
ASFContext *asf = s->priv_data;
|
|
int rsize = 1;
|
|
int num = avio_r8(pb);
|
|
int64_t ts0;
|
|
|
|
asf->packet_segments--;
|
|
asf->packet_key_frame = num >> 7;
|
|
asf->stream_index = asf->asfid2avid[num & 0x7f];
|
|
// sequence should be ignored!
|
|
DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
|
|
DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
|
|
DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
|
|
//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
|
|
if (asf->packet_replic_size >= 8) {
|
|
asf->packet_obj_size = avio_rl32(pb);
|
|
if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
|
|
av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
|
|
return -1;
|
|
}
|
|
asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
|
|
if(asf->packet_replic_size >= 8+38+4){
|
|
// for(i=0; i<asf->packet_replic_size-8; i++)
|
|
// av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
|
|
// av_log(s, AV_LOG_DEBUG, "\n");
|
|
avio_skip(pb, 10);
|
|
ts0= avio_rl64(pb);
|
|
avio_skip(pb, 8);;
|
|
avio_skip(pb, 12);
|
|
avio_rl32(pb);
|
|
avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
|
|
if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
|
|
else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
|
|
}else
|
|
avio_skip(pb, asf->packet_replic_size - 8);
|
|
rsize += asf->packet_replic_size; // FIXME - check validity
|
|
} else if (asf->packet_replic_size==1){
|
|
// multipacket - frag_offset is beginning timestamp
|
|
asf->packet_time_start = asf->packet_frag_offset;
|
|
asf->packet_frag_offset = 0;
|
|
asf->packet_frag_timestamp = asf->packet_timestamp;
|
|
|
|
asf->packet_time_delta = avio_r8(pb);
|
|
rsize++;
|
|
}else if(asf->packet_replic_size!=0){
|
|
av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
|
|
return -1;
|
|
}
|
|
if (asf->packet_flags & 0x01) {
|
|
DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
|
|
if (rsize > asf->packet_size_left) {
|
|
av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
|
|
return -1;
|
|
} else if(asf->packet_frag_size > asf->packet_size_left - rsize){
|
|
if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
|
|
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
|
|
return -1;
|
|
} else {
|
|
int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
|
|
asf->packet_size_left += diff;
|
|
asf->packet_padsize -= diff;
|
|
}
|
|
}
|
|
//printf("Fragsize %d\n", asf->packet_frag_size);
|
|
} else {
|
|
if (rsize > asf->packet_size_left) {
|
|
av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
|
|
return -1;
|
|
}
|
|
asf->packet_frag_size = asf->packet_size_left - rsize;
|
|
//printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
|
|
}
|
|
if (asf->packet_replic_size == 1) {
|
|
asf->packet_multi_size = asf->packet_frag_size;
|
|
if (asf->packet_multi_size > asf->packet_size_left)
|
|
return -1;
|
|
}
|
|
asf->packet_size_left -= rsize;
|
|
//printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Parse data from individual ASF packets (which were previously loaded
|
|
* with asf_get_packet()).
|
|
* @param s demux context
|
|
* @param pb context to read data from
|
|
* @param pkt pointer to store packet data into
|
|
* @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
|
|
* packets need to be loaded (through asf_get_packet())
|
|
*/
|
|
static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st = 0;
|
|
for (;;) {
|
|
int ret;
|
|
if(pb->eof_reached)
|
|
return AVERROR_EOF;
|
|
if (asf->packet_size_left < FRAME_HEADER_SIZE
|
|
|| asf->packet_segments < 1) {
|
|
//asf->packet_size_left <= asf->packet_padsize) {
|
|
int ret = asf->packet_size_left + asf->packet_padsize;
|
|
//printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
|
|
assert(ret>=0);
|
|
/* fail safe */
|
|
avio_skip(pb, ret);
|
|
|
|
asf->packet_pos= avio_tell(pb);
|
|
if (asf->data_object_size != (uint64_t)-1 &&
|
|
(asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
|
|
return AVERROR_EOF; /* Do not exceed the size of the data object */
|
|
return 1;
|
|
}
|
|
if (asf->packet_time_start == 0) {
|
|
if(asf_read_frame_header(s, pb) < 0){
|
|
asf->packet_segments= 0;
|
|
continue;
|
|
}
|
|
if (asf->stream_index < 0
|
|
|| s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
|
|
|| (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
|
|
) {
|
|
asf->packet_time_start = 0;
|
|
/* unhandled packet (should not happen) */
|
|
avio_skip(pb, asf->packet_frag_size);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
if(asf->stream_index < 0)
|
|
av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
|
|
continue;
|
|
}
|
|
asf->asf_st = s->streams[asf->stream_index]->priv_data;
|
|
}
|
|
asf_st = asf->asf_st;
|
|
|
|
if (asf->packet_replic_size == 1) {
|
|
// frag_offset is here used as the beginning timestamp
|
|
asf->packet_frag_timestamp = asf->packet_time_start;
|
|
asf->packet_time_start += asf->packet_time_delta;
|
|
asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
|
|
asf->packet_size_left--;
|
|
asf->packet_multi_size--;
|
|
if (asf->packet_multi_size < asf->packet_obj_size)
|
|
{
|
|
asf->packet_time_start = 0;
|
|
avio_skip(pb, asf->packet_multi_size);
|
|
asf->packet_size_left -= asf->packet_multi_size;
|
|
continue;
|
|
}
|
|
asf->packet_multi_size -= asf->packet_obj_size;
|
|
//printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
|
|
}
|
|
if( /*asf->packet_frag_size == asf->packet_obj_size*/
|
|
asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
|
|
&& asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
|
|
av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
|
|
asf_st->frag_offset, asf->packet_frag_size,
|
|
asf->packet_obj_size, asf_st->pkt.size);
|
|
asf->packet_obj_size= asf_st->pkt.size;
|
|
}
|
|
|
|
if ( asf_st->pkt.size != asf->packet_obj_size
|
|
|| asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
|
|
if(asf_st->pkt.data){
|
|
av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
|
|
asf_st->frag_offset = 0;
|
|
av_free_packet(&asf_st->pkt);
|
|
}
|
|
/* new packet */
|
|
av_new_packet(&asf_st->pkt, asf->packet_obj_size);
|
|
asf_st->seq = asf->packet_seq;
|
|
asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
|
|
asf_st->pkt.stream_index = asf->stream_index;
|
|
asf_st->pkt.pos =
|
|
asf_st->packet_pos= asf->packet_pos;
|
|
if (asf_st->pkt.data && asf_st->palette_changed) {
|
|
uint8_t *pal;
|
|
pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
|
|
AVPALETTE_SIZE);
|
|
if (!pal) {
|
|
av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
|
|
} else {
|
|
memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
|
|
asf_st->palette_changed = 0;
|
|
}
|
|
}
|
|
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
|
|
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
|
|
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
|
|
if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
|
|
asf->packet_key_frame = 1;
|
|
if (asf->packet_key_frame)
|
|
asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
|
|
}
|
|
|
|
/* read data */
|
|
//printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
|
|
// s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
|
|
// asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
if (asf->packet_size_left < 0)
|
|
continue;
|
|
|
|
if( asf->packet_frag_offset >= asf_st->pkt.size
|
|
|| asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
|
|
av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
|
|
asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
|
|
continue;
|
|
}
|
|
|
|
ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
|
|
asf->packet_frag_size);
|
|
if (ret != asf->packet_frag_size) {
|
|
if (ret < 0 || asf->packet_frag_offset + ret == 0)
|
|
return ret < 0 ? ret : AVERROR_EOF;
|
|
if (asf_st->ds_span > 1) {
|
|
// scrambling, we can either drop it completely or fill the remainder
|
|
// TODO: should we fill the whole packet instead of just the current
|
|
// fragment?
|
|
memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
|
|
asf->packet_frag_size - ret);
|
|
ret = asf->packet_frag_size;
|
|
} else
|
|
// no scrambling, so we can return partial packets
|
|
av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
|
|
}
|
|
if (s->key && s->keylen == 20)
|
|
ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
|
|
ret);
|
|
asf_st->frag_offset += ret;
|
|
/* test if whole packet is read */
|
|
if (asf_st->frag_offset == asf_st->pkt.size) {
|
|
//workaround for macroshit radio DVR-MS files
|
|
if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
|
|
&& asf_st->pkt.size > 100){
|
|
int i;
|
|
for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
|
|
if(i == asf_st->pkt.size){
|
|
av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
|
|
asf_st->frag_offset = 0;
|
|
av_free_packet(&asf_st->pkt);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* return packet */
|
|
if (asf_st->ds_span > 1) {
|
|
if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
|
|
av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
|
|
}else{
|
|
/* packet descrambling */
|
|
uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (newdata) {
|
|
int offset = 0;
|
|
memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
while (offset < asf_st->pkt.size) {
|
|
int off = offset / asf_st->ds_chunk_size;
|
|
int row = off / asf_st->ds_span;
|
|
int col = off % asf_st->ds_span;
|
|
int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
|
|
//printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
|
|
|
|
assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
|
|
assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
|
|
memcpy(newdata + offset,
|
|
asf_st->pkt.data + idx * asf_st->ds_chunk_size,
|
|
asf_st->ds_chunk_size);
|
|
offset += asf_st->ds_chunk_size;
|
|
}
|
|
av_free(asf_st->pkt.data);
|
|
asf_st->pkt.data = newdata;
|
|
}
|
|
}
|
|
}
|
|
asf_st->frag_offset = 0;
|
|
*pkt= asf_st->pkt;
|
|
//printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
|
|
asf_st->pkt.size = 0;
|
|
asf_st->pkt.data = 0;
|
|
break; // packet completed
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
|
|
for (;;) {
|
|
int ret;
|
|
|
|
/* parse cached packets, if any */
|
|
if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
|
|
return ret;
|
|
if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
|
|
assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
|
|
asf->packet_time_start = 0;
|
|
}
|
|
}
|
|
|
|
// Added to support seeking after packets have been read
|
|
// If information is not reset, read_packet fails due to
|
|
// leftover information from previous reads
|
|
static void asf_reset_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st;
|
|
int i;
|
|
|
|
asf->packet_size_left = 0;
|
|
asf->packet_segments = 0;
|
|
asf->packet_flags = 0;
|
|
asf->packet_property = 0;
|
|
asf->packet_timestamp = 0;
|
|
asf->packet_segsizetype = 0;
|
|
asf->packet_segments = 0;
|
|
asf->packet_seq = 0;
|
|
asf->packet_replic_size = 0;
|
|
asf->packet_key_frame = 0;
|
|
asf->packet_padsize = 0;
|
|
asf->packet_frag_offset = 0;
|
|
asf->packet_frag_size = 0;
|
|
asf->packet_frag_timestamp = 0;
|
|
asf->packet_multi_size = 0;
|
|
asf->packet_obj_size = 0;
|
|
asf->packet_time_delta = 0;
|
|
asf->packet_time_start = 0;
|
|
|
|
for(i=0; i<s->nb_streams; i++){
|
|
asf_st= s->streams[i]->priv_data;
|
|
av_free_packet(&asf_st->pkt);
|
|
asf_st->frag_offset=0;
|
|
asf_st->seq=0;
|
|
}
|
|
asf->asf_st= NULL;
|
|
}
|
|
|
|
static int asf_read_close(AVFormatContext *s)
|
|
{
|
|
asf_reset_header(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
|
|
{
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
ASFStream *asf_st;
|
|
int64_t pts;
|
|
int64_t pos= *ppos;
|
|
int i;
|
|
int64_t start_pos[ASF_MAX_STREAMS];
|
|
|
|
for(i=0; i<s->nb_streams; i++){
|
|
start_pos[i]= pos;
|
|
}
|
|
|
|
if (s->packet_size > 0)
|
|
pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
|
|
*ppos= pos;
|
|
avio_seek(s->pb, pos, SEEK_SET);
|
|
|
|
//printf("asf_read_pts\n");
|
|
asf_reset_header(s);
|
|
for(;;){
|
|
if (asf_read_packet(s, pkt) < 0){
|
|
av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
|
|
return AV_NOPTS_VALUE;
|
|
}
|
|
|
|
pts = pkt->dts;
|
|
|
|
av_free_packet(pkt);
|
|
if(pkt->flags&AV_PKT_FLAG_KEY){
|
|
i= pkt->stream_index;
|
|
|
|
asf_st= s->streams[i]->priv_data;
|
|
|
|
// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
|
|
pos= asf_st->packet_pos;
|
|
|
|
av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
|
|
start_pos[i]= asf_st->packet_pos + 1;
|
|
|
|
if(pkt->stream_index == stream_index)
|
|
break;
|
|
}
|
|
}
|
|
|
|
*ppos= pos;
|
|
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
|
|
|
|
return pts;
|
|
}
|
|
|
|
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
|
|
{
|
|
ff_asf_guid g;
|
|
ASFContext *asf = s->priv_data;
|
|
int64_t current_pos= avio_tell(s->pb);
|
|
int i;
|
|
|
|
avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
|
|
ff_get_guid(s->pb, &g);
|
|
|
|
/* the data object can be followed by other top-level objects,
|
|
skip them until the simple index object is reached */
|
|
while (ff_guidcmp(&g, &index_guid)) {
|
|
int64_t gsize= avio_rl64(s->pb);
|
|
if (gsize < 24 || s->pb->eof_reached) {
|
|
avio_seek(s->pb, current_pos, SEEK_SET);
|
|
return;
|
|
}
|
|
avio_skip(s->pb, gsize-24);
|
|
ff_get_guid(s->pb, &g);
|
|
}
|
|
|
|
{
|
|
int64_t itime, last_pos=-1;
|
|
int pct, ict;
|
|
int64_t av_unused gsize= avio_rl64(s->pb);
|
|
ff_get_guid(s->pb, &g);
|
|
itime=avio_rl64(s->pb);
|
|
pct=avio_rl32(s->pb);
|
|
ict=avio_rl32(s->pb);
|
|
av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
|
|
|
|
for (i=0;i<ict;i++){
|
|
int pktnum=avio_rl32(s->pb);
|
|
int pktct =avio_rl16(s->pb);
|
|
int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
|
|
int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
|
|
|
|
if(pos != last_pos){
|
|
av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts);
|
|
av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
|
|
last_pos=pos;
|
|
}
|
|
}
|
|
asf->index_read= 1;
|
|
}
|
|
avio_seek(s->pb, current_pos, SEEK_SET);
|
|
}
|
|
|
|
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVStream *st = s->streams[stream_index];
|
|
int64_t pos;
|
|
int index;
|
|
|
|
if (s->packet_size <= 0)
|
|
return -1;
|
|
|
|
/* Try using the protocol's read_seek if available */
|
|
if(s->pb) {
|
|
int ret = avio_seek_time(s->pb, stream_index, pts, flags);
|
|
if(ret >= 0)
|
|
asf_reset_header(s);
|
|
if (ret != AVERROR(ENOSYS))
|
|
return ret;
|
|
}
|
|
|
|
if (!asf->index_read)
|
|
asf_build_simple_index(s, stream_index);
|
|
|
|
if((asf->index_read && st->index_entries)){
|
|
index= av_index_search_timestamp(st, pts, flags);
|
|
if(index >= 0) {
|
|
/* find the position */
|
|
pos = st->index_entries[index].pos;
|
|
|
|
/* do the seek */
|
|
av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
|
|
avio_seek(s->pb, pos, SEEK_SET);
|
|
asf_reset_header(s);
|
|
return 0;
|
|
}
|
|
}
|
|
/* no index or seeking by index failed */
|
|
if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
|
|
return -1;
|
|
asf_reset_header(s);
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_asf_demuxer = {
|
|
.name = "asf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("ASF format"),
|
|
.priv_data_size = sizeof(ASFContext),
|
|
.read_probe = asf_probe,
|
|
.read_header = asf_read_header,
|
|
.read_packet = asf_read_packet,
|
|
.read_close = asf_read_close,
|
|
.read_seek = asf_read_seek,
|
|
.read_timestamp = asf_read_pts,
|
|
.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
|
|
};
|