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- /*
- * ASF compatible demuxer
- * Copyright (c) 2000, 2001 Fabrice Bellard
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- //#define DEBUG
- #include "libavutil/bswap.h"
- #include "libavutil/common.h"
- #include "libavutil/avstring.h"
- #include "libavutil/dict.h"
- #include "libavutil/mathematics.h"
- #include "libavcodec/mpegaudio.h"
- #include "avformat.h"
- #include "avio_internal.h"
- #include "riff.h"
- #include "asf.h"
- #include "asfcrypt.h"
- #include "avlanguage.h"
- typedef struct {
- int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
- ASFStream streams[128]; ///< it's max number and it's not that big
- uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
- AVRational dar[128];
- char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
- /* non streamed additonnal info */
- /* packet filling */
- int packet_size_left;
- /* only for reading */
- uint64_t data_offset; ///< beginning of the first data packet
- uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
- uint64_t data_object_size; ///< size of the data object
- int index_read;
- ASFMainHeader hdr;
- int packet_flags;
- int packet_property;
- int packet_timestamp;
- int packet_segsizetype;
- int packet_segments;
- int packet_seq;
- int packet_replic_size;
- int packet_key_frame;
- int packet_padsize;
- unsigned int packet_frag_offset;
- unsigned int packet_frag_size;
- int64_t packet_frag_timestamp;
- int packet_multi_size;
- int packet_obj_size;
- int packet_time_delta;
- int packet_time_start;
- int64_t packet_pos;
- int stream_index;
- ASFStream* asf_st; ///< currently decoded stream
- } ASFContext;
- #undef NDEBUG
- #include <assert.h>
- #define ASF_MAX_STREAMS 127
- #define FRAME_HEADER_SIZE 17
- // Fix Me! FRAME_HEADER_SIZE may be different.
- static const ff_asf_guid index_guid = {
- 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
- };
- #ifdef DEBUG
- static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
- 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
- };
- #define PRINT_IF_GUID(g,cmp) \
- if (!ff_guidcmp(g, &cmp)) \
- av_dlog(NULL, "(GUID: %s) ", #cmp)
- static void print_guid(const ff_asf_guid *g)
- {
- int i;
- PRINT_IF_GUID(g, ff_asf_header);
- else PRINT_IF_GUID(g, ff_asf_file_header);
- else PRINT_IF_GUID(g, ff_asf_stream_header);
- else PRINT_IF_GUID(g, ff_asf_audio_stream);
- else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
- else PRINT_IF_GUID(g, ff_asf_video_stream);
- else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
- else PRINT_IF_GUID(g, ff_asf_command_stream);
- else PRINT_IF_GUID(g, ff_asf_comment_header);
- else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
- else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
- else PRINT_IF_GUID(g, ff_asf_data_header);
- else PRINT_IF_GUID(g, index_guid);
- else PRINT_IF_GUID(g, ff_asf_head1_guid);
- else PRINT_IF_GUID(g, ff_asf_head2_guid);
- else PRINT_IF_GUID(g, ff_asf_my_guid);
- else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
- else PRINT_IF_GUID(g, ff_asf_extended_content_header);
- else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
- else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
- else PRINT_IF_GUID(g, ff_asf_metadata_header);
- else PRINT_IF_GUID(g, ff_asf_marker_header);
- else PRINT_IF_GUID(g, stream_bitrate_guid);
- else PRINT_IF_GUID(g, ff_asf_language_guid);
- else
- av_dlog(NULL, "(GUID: unknown) ");
- for(i=0;i<16;i++)
- av_dlog(NULL, " 0x%02x,", (*g)[i]);
- av_dlog(NULL, "}\n");
- }
- #undef PRINT_IF_GUID
- #else
- #define print_guid(g)
- #endif
- static int asf_probe(AVProbeData *pd)
- {
- /* check file header */
- if (!ff_guidcmp(pd->buf, &ff_asf_header))
- return AVPROBE_SCORE_MAX;
- else
- return 0;
- }
- static int get_value(AVIOContext *pb, int type){
- switch(type){
- case 2: return avio_rl32(pb);
- case 3: return avio_rl32(pb);
- case 4: return avio_rl64(pb);
- case 5: return avio_rl16(pb);
- default:return INT_MIN;
- }
- }
- static void get_tag(AVFormatContext *s, const char *key, int type, int len)
- {
- char *value;
- int64_t off = avio_tell(s->pb);
- if ((unsigned)len >= (UINT_MAX - 1)/2)
- return;
- value = av_malloc(2*len+1);
- if (!value)
- goto finish;
- if (type == 0) { // UTF16-LE
- avio_get_str16le(s->pb, len, value, 2*len + 1);
- } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
- uint64_t num = get_value(s->pb, type);
- snprintf(value, len, "%"PRIu64, num);
- } else {
- av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
- goto finish;
- }
- if (*value)
- av_dict_set(&s->metadata, key, value, 0);
- finish:
- av_freep(&value);
- avio_seek(s->pb, off + len, SEEK_SET);
- }
- static int asf_read_file_properties(AVFormatContext *s, int64_t size)
- {
- ASFContext *asf = s->priv_data;
- AVIOContext *pb = s->pb;
- ff_get_guid(pb, &asf->hdr.guid);
- asf->hdr.file_size = avio_rl64(pb);
- asf->hdr.create_time = avio_rl64(pb);
- avio_rl64(pb); /* number of packets */
- asf->hdr.play_time = avio_rl64(pb);
- asf->hdr.send_time = avio_rl64(pb);
- asf->hdr.preroll = avio_rl32(pb);
- asf->hdr.ignore = avio_rl32(pb);
- asf->hdr.flags = avio_rl32(pb);
- asf->hdr.min_pktsize = avio_rl32(pb);
- asf->hdr.max_pktsize = avio_rl32(pb);
- asf->hdr.max_bitrate = avio_rl32(pb);
- s->packet_size = asf->hdr.max_pktsize;
- return 0;
- }
- static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
- {
- ASFContext *asf = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
- ASFStream *asf_st;
- ff_asf_guid g;
- enum AVMediaType type;
- int type_specific_size, sizeX;
- unsigned int tag1;
- int64_t pos1, pos2, start_time;
- int test_for_ext_stream_audio, is_dvr_ms_audio=0;
- if (s->nb_streams == ASF_MAX_STREAMS) {
- av_log(s, AV_LOG_ERROR, "too many streams\n");
- return AVERROR(EINVAL);
- }
- pos1 = avio_tell(pb);
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR(ENOMEM);
- av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
- asf_st = av_mallocz(sizeof(ASFStream));
- if (!asf_st)
- return AVERROR(ENOMEM);
- st->priv_data = asf_st;
- start_time = asf->hdr.preroll;
- asf_st->stream_language_index = 128; // invalid stream index means no language info
- if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
- st->duration = asf->hdr.play_time /
- (10000000 / 1000) - start_time;
- }
- ff_get_guid(pb, &g);
- test_for_ext_stream_audio = 0;
- if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
- type = AVMEDIA_TYPE_AUDIO;
- } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
- type = AVMEDIA_TYPE_VIDEO;
- } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
- type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = CODEC_ID_MJPEG;
- } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
- type = AVMEDIA_TYPE_DATA;
- } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
- test_for_ext_stream_audio = 1;
- type = AVMEDIA_TYPE_UNKNOWN;
- } else {
- return -1;
- }
- ff_get_guid(pb, &g);
- avio_skip(pb, 8); /* total_size */
- type_specific_size = avio_rl32(pb);
- avio_rl32(pb);
- st->id = avio_rl16(pb) & 0x7f; /* stream id */
- // mapping of asf ID to AV stream ID;
- asf->asfid2avid[st->id] = s->nb_streams - 1;
- avio_rl32(pb);
- if (test_for_ext_stream_audio) {
- ff_get_guid(pb, &g);
- if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
- type = AVMEDIA_TYPE_AUDIO;
- is_dvr_ms_audio=1;
- ff_get_guid(pb, &g);
- avio_rl32(pb);
- avio_rl32(pb);
- avio_rl32(pb);
- ff_get_guid(pb, &g);
- avio_rl32(pb);
- }
- }
- st->codec->codec_type = type;
- if (type == AVMEDIA_TYPE_AUDIO) {
- int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
- if (ret < 0)
- return ret;
- if (is_dvr_ms_audio) {
- // codec_id and codec_tag are unreliable in dvr_ms
- // files. Set them later by probing stream.
- st->request_probe= 1;
- st->codec->codec_tag = 0;
- }
- if (st->codec->codec_id == CODEC_ID_AAC) {
- st->need_parsing = AVSTREAM_PARSE_NONE;
- } else {
- st->need_parsing = AVSTREAM_PARSE_FULL;
- }
- /* We have to init the frame size at some point .... */
- pos2 = avio_tell(pb);
- if (size >= (pos2 + 8 - pos1 + 24)) {
- asf_st->ds_span = avio_r8(pb);
- asf_st->ds_packet_size = avio_rl16(pb);
- asf_st->ds_chunk_size = avio_rl16(pb);
- avio_rl16(pb); //ds_data_size
- avio_r8(pb); //ds_silence_data
- }
- //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
- // asf_st->ds_packet_size, asf_st->ds_chunk_size,
- // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
- if (asf_st->ds_span > 1) {
- if (!asf_st->ds_chunk_size
- || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
- || asf_st->ds_packet_size % asf_st->ds_chunk_size)
- asf_st->ds_span = 0; // disable descrambling
- }
- switch (st->codec->codec_id) {
- case CODEC_ID_MP3:
- st->codec->frame_size = MPA_FRAME_SIZE;
- break;
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- case CODEC_ID_PCM_S8:
- case CODEC_ID_PCM_U8:
- case CODEC_ID_PCM_ALAW:
- case CODEC_ID_PCM_MULAW:
- st->codec->frame_size = 1;
- break;
- default:
- /* This is probably wrong, but it prevents a crash later */
- st->codec->frame_size = 1;
- break;
- }
- } else if (type == AVMEDIA_TYPE_VIDEO &&
- size - (avio_tell(pb) - pos1 + 24) >= 51) {
- avio_rl32(pb);
- avio_rl32(pb);
- avio_r8(pb);
- avio_rl16(pb); /* size */
- sizeX= avio_rl32(pb); /* size */
- st->codec->width = avio_rl32(pb);
- st->codec->height = avio_rl32(pb);
- /* not available for asf */
- avio_rl16(pb); /* panes */
- st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
- tag1 = avio_rl32(pb);
- avio_skip(pb, 20);
- // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
- if (sizeX > 40) {
- st->codec->extradata_size = sizeX - 40;
- st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- avio_read(pb, st->codec->extradata, st->codec->extradata_size);
- }
- /* Extract palette from extradata if bpp <= 8 */
- /* This code assumes that extradata contains only palette */
- /* This is true for all paletted codecs implemented in ffmpeg */
- if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
- int av_unused i;
- st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
- #if HAVE_BIGENDIAN
- for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
- st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
- #else
- memcpy(st->codec->palctrl->palette, st->codec->extradata,
- FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
- #endif
- st->codec->palctrl->palette_changed = 1;
- }
- st->codec->codec_tag = tag1;
- st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
- if(tag1 == MKTAG('D', 'V', 'R', ' ')){
- st->need_parsing = AVSTREAM_PARSE_FULL;
- // 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
- st->codec->width =
- st->codec->height = 0;
- av_freep(&st->codec->extradata);
- st->codec->extradata_size=0;
- }
- if(st->codec->codec_id == CODEC_ID_H264)
- st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
- }
- pos2 = avio_tell(pb);
- avio_skip(pb, size - (pos2 - pos1 + 24));
- return 0;
- }
- static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
- {
- ASFContext *asf = s->priv_data;
- AVIOContext *pb = s->pb;
- ff_asf_guid g;
- int ext_len, payload_ext_ct, stream_ct, i;
- uint32_t leak_rate, stream_num;
- unsigned int stream_languageid_index;
- avio_rl64(pb); // starttime
- avio_rl64(pb); // endtime
- leak_rate = avio_rl32(pb); // leak-datarate
- avio_rl32(pb); // bucket-datasize
- avio_rl32(pb); // init-bucket-fullness
- avio_rl32(pb); // alt-leak-datarate
- avio_rl32(pb); // alt-bucket-datasize
- avio_rl32(pb); // alt-init-bucket-fullness
- avio_rl32(pb); // max-object-size
- avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
- stream_num = avio_rl16(pb); // stream-num
- stream_languageid_index = avio_rl16(pb); // stream-language-id-index
- if (stream_num < 128)
- asf->streams[stream_num].stream_language_index = stream_languageid_index;
- avio_rl64(pb); // avg frametime in 100ns units
- stream_ct = avio_rl16(pb); //stream-name-count
- payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
- 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);
- ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
- }
- return 0;
- }
- static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
- {
- 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 (url_feof(pb)) {
- 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 (url_feof(pb))
- 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 (!url_feof(pb))
- 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 (!url_feof(pb))
- 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 (rsize+asf->packet_replic_size > asf->packet_size_left) {
- av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
- return -1;
- }
- 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 {
- 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(url_feof(pb))
- 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;
- //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)
- {
- int i;
- asf_reset_header(s);
- for(i=0;i<s->nb_streams;i++) {
- AVStream *st = s->streams[i];
- av_free(st->codec->palctrl);
- }
- 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;
- if (avio_seek(s->pb, pos, SEEK_SET) < 0)
- return AV_NOPTS_VALUE;
- //printf("asf_read_pts\n");
- asf_reset_header(s);
- for(;;){
- if (av_read_frame(s, pkt) < 0){
- av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
- return AV_NOPTS_VALUE;
- }
- pts= pkt->pts;
- 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;
- if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0)
- return;
- 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 || url_feof(s->pb)) {
- 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);
- if(avio_seek(s->pb, pos, SEEK_SET) < 0)
- return -1;
- asf_reset_header(s);
- return 0;
- }
- }
- /* no index or seeking by index failed */
- if(av_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,
- };
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