diff options
Diffstat (limited to 'libavformat/asfdec_f.c')
| -rw-r--r-- | libavformat/asfdec_f.c | 1694 |
1 files changed, 1694 insertions, 0 deletions
diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c new file mode 100644 index 0000000000..7c31cfaee4 --- /dev/null +++ b/libavformat/asfdec_f.c @@ -0,0 +1,1694 @@ +/* + * 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 + */ + +#include <inttypes.h> + +#include "libavutil/attributes.h" +#include "libavutil/avassert.h" +#include "libavutil/avstring.h" +#include "libavutil/bswap.h" +#include "libavutil/common.h" +#include "libavutil/dict.h" +#include "libavutil/internal.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" +#include "avformat.h" +#include "avio_internal.h" +#include "avlanguage.h" +#include "id3v2.h" +#include "internal.h" +#include "riff.h" +#include "asf.h" +#include "asfcrypt.h" + +typedef struct ASFPayload { + uint8_t type; + uint16_t size; +} ASFPayload; + +typedef struct ASFStream { + int num; + unsigned char seq; + /* use for reading */ + AVPacket pkt; + int frag_offset; + int packet_obj_size; + int timestamp; + int64_t duration; + int skip_to_key; + int pkt_clean; + + int ds_span; /* descrambling */ + int ds_packet_size; + int ds_chunk_size; + + int64_t packet_pos; + + uint16_t stream_language_index; + + int palette_changed; + uint32_t palette[256]; + + int payload_ext_ct; + ASFPayload payload[8]; +} ASFStream; + +typedef struct ASFContext { + const AVClass *class; + 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 ts_is_pts; + int packet_multi_size; + int packet_time_delta; + int packet_time_start; + int64_t packet_pos; + + int stream_index; + + ASFStream *asf_st; ///< currently decoded stream + + int no_resync_search; + int export_xmp; + + int uses_std_ecc; +} ASFContext; + +static const AVOption options[] = { + { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, + { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, + { NULL }, +}; + +static const AVClass asf_class = { + .class_name = "asf demuxer", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +#undef NDEBUG +#include <assert.h> + +#define ASF_MAX_STREAMS 127 +#define FRAME_HEADER_SIZE 6 +// Fix Me! FRAME_HEADER_SIZE may be different. +// (7 is known to be too large for GipsyGuitar.wmv) + +#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_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp) + +static void print_guid(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, ff_asf_simple_index_header); + 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_metadata_library_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_log(NULL, AV_LOG_TRACE, "(GUID: unknown) "); + for (i = 0; i < 16; i++) + av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]); + av_log(NULL, AV_LOG_TRACE, "}\n"); +} +#undef PRINT_IF_GUID +#else +#define print_guid(g) while(0) +#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; +} + +/* size of type 2 (BOOL) is 32bit for "Extended Content Description Object" + * but 16 bit for "Metadata Object" and "Metadata Library Object" */ +static int get_value(AVIOContext *pb, int type, int type2_size) +{ + switch (type) { + case 2: + return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb); + case 3: + return avio_rl32(pb); + case 4: + return avio_rl64(pb); + case 5: + return avio_rl16(pb); + default: + return INT_MIN; + } +} + +/* MSDN claims that this should be "compatible with the ID3 frame, APIC", + * but in reality this is only loosely similar */ +static int asf_read_picture(AVFormatContext *s, int len) +{ + AVPacket pkt = { 0 }; + const CodecMime *mime = ff_id3v2_mime_tags; + enum AVCodecID id = AV_CODEC_ID_NONE; + char mimetype[64]; + uint8_t *desc = NULL; + AVStream *st = NULL; + int ret, type, picsize, desc_len; + + /* type + picsize + mime + desc */ + if (len < 1 + 4 + 2 + 2) { + av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); + return AVERROR_INVALIDDATA; + } + + /* picture type */ + type = avio_r8(s->pb); + len--; + if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) { + av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type); + type = 0; + } + + /* picture data size */ + picsize = avio_rl32(s->pb); + len -= 4; + + /* picture MIME type */ + len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype)); + while (mime->id != AV_CODEC_ID_NONE) { + if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { + id = mime->id; + break; + } + mime++; + } + if (id == AV_CODEC_ID_NONE) { + av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", + mimetype); + return 0; + } + + if (picsize >= len) { + av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n", + picsize, len); + return AVERROR_INVALIDDATA; + } + + /* picture description */ + desc_len = (len - picsize) * 2 + 1; + desc = av_malloc(desc_len); + if (!desc) + return AVERROR(ENOMEM); + len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len); + + ret = av_get_packet(s->pb, &pkt, picsize); + if (ret < 0) + goto fail; + + st = avformat_new_stream(s, NULL); + if (!st) { + ret = AVERROR(ENOMEM); + goto fail; + } + st->disposition |= AV_DISPOSITION_ATTACHED_PIC; + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + st->codec->codec_id = id; + st->attached_pic = pkt; + st->attached_pic.stream_index = st->index; + st->attached_pic.flags |= AV_PKT_FLAG_KEY; + + if (*desc) + av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL); + else + av_freep(&desc); + + av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0); + + return 0; + +fail: + av_freep(&desc); + av_free_packet(&pkt); + return ret; +} + +static void get_id3_tag(AVFormatContext *s, int len) +{ + ID3v2ExtraMeta *id3v2_extra_meta = NULL; + + ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len); + if (id3v2_extra_meta) + ff_id3v2_parse_apic(s, &id3v2_extra_meta); + ff_id3v2_free_extra_meta(&id3v2_extra_meta); +} + +static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size) +{ + ASFContext *asf = s->priv_data; + char *value = NULL; + int64_t off = avio_tell(s->pb); +#define LEN 22 + + if ((unsigned)len >= (UINT_MAX - LEN) / 2) + return; + + if (!asf->export_xmp && !strncmp(key, "xmp", 3)) + goto finish; + + value = av_malloc(2 * len + LEN); + if (!value) + goto finish; + + switch (type) { + case ASF_UNICODE: + avio_get_str16le(s->pb, len, value, 2 * len + 1); + break; + case -1: // ASCI + avio_read(s->pb, value, len); + value[len]=0; + break; + case ASF_BYTE_ARRAY: + if (!strcmp(key, "WM/Picture")) { // handle cover art + asf_read_picture(s, len); + } else if (!strcmp(key, "ID3")) { // handle ID3 tag + get_id3_tag(s, len); + } else { + av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key); + } + goto finish; + case ASF_BOOL: + case ASF_DWORD: + case ASF_QWORD: + case ASF_WORD: { + uint64_t num = get_value(s->pb, type, type2_size); + snprintf(value, LEN, "%"PRIu64, num); + break; + } + case ASF_GUID: + av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key); + goto finish; + default: + 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); + if (asf->hdr.min_pktsize >= (1U << 29)) + return AVERROR_INVALIDDATA; + 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 = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ + start_time = asf->hdr.preroll; + + if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming... + int64_t fsize = avio_size(pb); + if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || + 20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size)) + 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 = AV_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; + asf_st = &asf->streams[st->id]; + + 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(s, pb, st->codec, type_specific_size, 0); + 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 == AV_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 + } + 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 + } + } 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); + if (sizeX > 40) { + st->codec->extradata_size = ffio_limit(pb, sizeX - 40); + st->codec->extradata = av_mallocz(st->codec->extradata_size + + AV_INPUT_BUFFER_PADDING_SIZE); + if (!st->codec->extradata) + return AVERROR(ENOMEM); + 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 libavcodec */ + if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { +#if HAVE_BIGENDIAN + int i; + for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++) + asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]); +#else + memcpy(asf_st->palette, st->codec->extradata, + FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); +#endif + asf_st->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 contains wrong w/h and MS even puts a fake seq header + * with wrong w/h in extradata while a correct one is in the 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 == AV_CODEC_ID_H264) + st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; + if (st->codec->codec_id == AV_CODEC_ID_MPEG4) + 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; + asf->streams[stream_num].payload_ext_ct = 0; + } + + 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++) { + int size; + ff_get_guid(pb, &g); + size = avio_rl16(pb); + ext_len = avio_rl32(pb); + avio_skip(pb, ext_len); + if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) { + ASFPayload *p = &asf->streams[stream_num].payload[i]; + p->type = g[0]; + p->size = size; + av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size ); + asf->streams[stream_num].payload_ext_ct ++; + } + } + + 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, 32); + get_tag(s, "author", 0, len2, 32); + get_tag(s, "copyright", 0, len3, 32); + get_tag(s, "comment", 0, len4, 32); + 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 starts 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, 32); + else if (!strcmp(name, "AspectRatioY")) + asf->dar[0].den = get_value(s->pb, value_type, 32); + else + get_tag(s, name, value_type, value_len, 32); + } + + 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_utf16, name_len_utf8, value_len; + int ret, i; + n = avio_rl16(pb); + + for (i = 0; i < n; i++) { + uint8_t *name; + int value_type; + + avio_rl16(pb); // lang_list_index + stream_num = avio_rl16(pb); + name_len_utf16 = avio_rl16(pb); + value_type = avio_rl16(pb); /* value_type */ + value_len = avio_rl32(pb); + + name_len_utf8 = 2*name_len_utf16 + 1; + name = av_malloc(name_len_utf8); + if (!name) + return AVERROR(ENOMEM); + + if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16) + avio_skip(pb, name_len_utf16 - ret); + av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n", + i, stream_num, name_len_utf16, value_type, value_len, name); + + if (!strcmp(name, "AspectRatioX")){ + int aspect_x = get_value(s->pb, value_type, 16); + if(stream_num < 128) + asf->dar[stream_num].num = aspect_x; + } else if(!strcmp(name, "AspectRatioY")){ + int aspect_y = get_value(s->pb, value_type, 16); + if(stream_num < 128) + asf->dar[stream_num].den = aspect_y; + } else { + get_tag(s, name, value_type, value_len, 16); + } + av_freep(&name); + } + + return 0; +} + +static int asf_read_marker(AVFormatContext *s, int64_t size) +{ + AVIOContext *pb = s->pb; + ASFContext *asf = s->priv_data; + 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 + pres_time -= asf->hdr.preroll * 10000; + 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 AVERROR_INVALIDDATA; + avio_rl64(pb); + avio_rl32(pb); + avio_r8(pb); + avio_r8(pb); + memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); + + for (i = 0; i<128; i++) + asf->streams[i].stream_language_index = 128; // invalid stream index means no language info + + for (;;) { + uint64_t gpos = avio_tell(pb); + int ret = 0; + ff_get_guid(pb, &g); + gsize = avio_rl64(pb); + print_guid(&g); + 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 AVERROR_INVALIDDATA; + if (!ff_guidcmp(&g, &ff_asf_file_header)) { + ret = asf_read_file_properties(s, gsize); + } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { + ret = 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_metadata_library_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 (avio_feof(pb)) { + return AVERROR_EOF; + } else { + if (!s->keylen) { + if (!ff_guidcmp(&g, &ff_asf_content_encryption)) { + unsigned int len; + AVPacket pkt; + av_log(s, AV_LOG_WARNING, + "DRM protected stream detected, decoding will likely fail!\n"); + len= avio_rl32(pb); + av_log(s, AV_LOG_DEBUG, "Secret data:\n"); + + if ((ret = av_get_packet(pb, &pkt, len)) < 0) + return ret; + av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); + av_free_packet(&pkt); + len= avio_rl32(pb); + get_tag(s, "ASF_Protection_Type", -1, len, 32); + len= avio_rl32(pb); + get_tag(s, "ASF_Key_ID", -1, len, 32); + len= avio_rl32(pb); + get_tag(s, "ASF_License_URL", -1, len, 32); + } 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"); + av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0); + } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { + av_log(s, AV_LOG_INFO, "Digital signature detected!\n"); + } + } + } + if (ret < 0) + return ret; + + if (avio_tell(pb) != gpos + gsize) + av_log(s, AV_LOG_DEBUG, + "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\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 (avio_feof(pb)) + return AVERROR_EOF; + 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) && + // Use ASF container value if the stream doesn't set AR. + (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) + 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_TRACE, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n", + i, st->codec->codec_type, asf->dar[i].num, asf->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 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 (asf->uses_std_ecc > 0) { + // if we do not know packet size, allow skipping up to 32 kB + off = 32768; + if (asf->no_resync_search) + off = 3; +// else if (s->packet_size > 0 && !asf->uses_std_ecc) +// off = (avio_tell(pb) - s->internal->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 (!avio_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 (!avio_feof(pb)) + av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); + return AVERROR_INVALIDDATA; + } + c = avio_r8(pb); + d = avio_r8(pb); + rsize += 3; + } else if(!avio_feof(pb)) { + avio_seek(pb, -1, SEEK_CUR); // FIXME + } + } else { + c = avio_r8(pb); + if (c & 0x80) { + rsize ++; + if (!(c & 0x60)) { + d = avio_r8(pb); + e = avio_r8(pb); + avio_seek(pb, (c & 0xF) - 2, SEEK_CUR); + rsize += c & 0xF; + } + + if (c != 0x82) + avpriv_request_sample(s, "Invalid ECC byte\n"); + + if (!asf->uses_std_ecc) + asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1; + + c = avio_r8(pb); + } else + asf->uses_std_ecc = -1; + d = avio_r8(pb); + } + + 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 %"PRIu32" at:%"PRId64"\n", + packet_length, avio_tell(pb)); + return AVERROR_INVALIDDATA; + } + if (padsize >= packet_length) { + av_log(s, AV_LOG_ERROR, + "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb)); + return AVERROR_INVALIDDATA; + } + + 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; + } + if (rsize > packet_length - padsize) { + asf->packet_size_left = 0; + av_log(s, AV_LOG_ERROR, + "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n", + rsize, packet_length, padsize, avio_tell(pb)); + return AVERROR_INVALIDDATA; + } + 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_log(s, AV_LOG_TRACE, "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; + ASFStream *asfst; + int rsize = 1; + int num = avio_r8(pb); + int i; + int64_t ts0, ts1 av_unused; + + asf->packet_segments--; + asf->packet_key_frame = num >> 7; + asf->stream_index = asf->asfid2avid[num & 0x7f]; + asfst = &asf->streams[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); + av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n", + asf->packet_key_frame, asf->stream_index, asf->packet_seq, + asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property); + if (rsize+(int64_t)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 AVERROR_INVALIDDATA; + } + if (asf->packet_replic_size >= 8) { + int64_t end = avio_tell(pb) + asf->packet_replic_size; + AVRational aspect; + asfst->packet_obj_size = avio_rl32(pb); + if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) { + av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size); + asfst->packet_obj_size = 0; + return AVERROR_INVALIDDATA; + } + asf->packet_frag_timestamp = avio_rl32(pb); // timestamp + + for (i = 0; i < asfst->payload_ext_ct; i++) { + ASFPayload *p = &asfst->payload[i]; + int size = p->size; + int64_t payend; + if (size == 0xFFFF) + size = avio_rl16(pb); + payend = avio_tell(pb) + size; + if (payend > end) { + av_log(s, AV_LOG_ERROR, "too long payload\n"); + break; + } + switch (p->type) { + case 0x50: +// duration = avio_rl16(pb); + break; + case 0x54: + aspect.num = avio_r8(pb); + aspect.den = avio_r8(pb); + if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) { + s->streams[asf->stream_index]->sample_aspect_ratio = aspect; + } + break; + case 0x2A: + avio_skip(pb, 8); + ts0 = avio_rl64(pb); + ts1 = avio_rl64(pb); + if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000; + else asf->packet_frag_timestamp = AV_NOPTS_VALUE; + asf->ts_is_pts = 1; + break; + case 0x5B: + case 0xB7: + case 0xCC: + case 0xC0: + case 0xA0: + //unknown + break; + } + avio_seek(pb, payend, SEEK_SET); + } + + avio_seek(pb, end, SEEK_SET); + 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 AVERROR_INVALIDDATA; + } + 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 AVERROR_INVALIDDATA; + } 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-%d+%d)\n", + asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize); + return AVERROR_INVALIDDATA; + } else { + int diff = asf->packet_frag_size - (asf->packet_size_left - rsize); + asf->packet_size_left += diff; + asf->packet_padsize -= diff; + } + } + } else { + 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 AVERROR_INVALIDDATA; + } + asf->packet_size_left -= 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 asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) +{ + ASFContext *asf = s->priv_data; + ASFStream *asf_st = 0; + for (;;) { + int ret; + if (avio_feof(pb)) + return AVERROR_EOF; + if (asf->packet_size_left < FRAME_HEADER_SIZE || + asf->packet_segments < 1 && asf->packet_time_start == 0) { + int ret = asf->packet_size_left + asf->packet_padsize; + + if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE) + av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n"); + + 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_time_start = 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->streams[s->streams[asf->stream_index]->id].skip_to_key))) { + 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 = &asf->streams[s->streams[asf->stream_index]->id]; + if (!asf->packet_frag_offset) + asf->asf_st->skip_to_key = 0; + } + asf_st = asf->asf_st; + av_assert0(asf_st); + + if (!asf_st->frag_offset && asf->packet_frag_offset) { + av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for " + "stream:%d, expected:%d but got %d from pkt)\n", + asf->stream_index, asf_st->frag_offset, + asf->packet_frag_offset); + avio_skip(pb, asf->packet_frag_size); + asf->packet_size_left -= asf->packet_frag_size; + continue; + } + + 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_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb); + asf->packet_size_left--; + asf->packet_multi_size--; + if (asf->packet_multi_size < asf_st->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_st->packet_obj_size; + } + + if (asf_st->pkt.size != asf_st->packet_obj_size || + // FIXME is this condition sufficient? + asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { + int ret; + + if (asf_st->pkt.data) { + av_log(s, AV_LOG_INFO, + "freeing incomplete packet size %d, new %d\n", + asf_st->pkt.size, asf_st->packet_obj_size); + asf_st->frag_offset = 0; + av_free_packet(&asf_st->pkt); + } + /* new packet */ + if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0) + return ret; + asf_st->seq = asf->packet_seq; + if (asf->ts_is_pts) { + asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll; + } else + 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; + asf_st->pkt_clean = 0; + + 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; + } + } + av_log(asf, AV_LOG_TRACE, "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_st->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 */ + av_log(asf, AV_LOG_TRACE, "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; + } + + if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) { + memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset); + asf_st->pkt_clean = 1; + } + + 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 == AV_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 */ + AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size + + AV_INPUT_BUFFER_PADDING_SIZE); + if (buf) { + uint8_t *newdata = buf->data; + int offset = 0; + memset(newdata + asf_st->pkt.size, 0, + AV_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; + 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_buffer_unref(&asf_st->pkt.buf); + asf_st->pkt.buf = buf; + asf_st->pkt.data = buf->data; + } + } + } + asf_st->frag_offset = 0; + *pkt = asf_st->pkt; + asf_st->pkt.buf = 0; + asf_st->pkt.size = 0; + asf_st->pkt.data = 0; + asf_st->pkt.side_data_elems = 0; + asf_st->pkt.side_data = NULL; + 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 = asf_parse_packet(s, s->pb, pkt)) <= 0) + return ret; + if ((ret = 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_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_time_delta = 0; + asf->packet_time_start = 0; + + for (i = 0; i < 128; i++) { + asf_st = &asf->streams[i]; + av_free_packet(&asf_st->pkt); + asf_st->packet_obj_size = 0; + asf_st->frag_offset = 0; + asf_st->seq = 0; + } + asf->asf_st = NULL; +} + +static void skip_to_key(AVFormatContext *s) +{ + ASFContext *asf = s->priv_data; + int i; + + for (i = 0; i < 128; i++) { + int j = asf->asfid2avid[i]; + ASFStream *asf_st = &asf->streams[i]; + if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO) + continue; + + asf_st->skip_to_key = 1; + } +} + +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) +{ + ASFContext *asf = s->priv_data; + 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->internal->data_offset) / + s->packet_size * s->packet_size + + s->internal->data_offset; + *ppos = pos; + if (avio_seek(s->pb, pos, SEEK_SET) < 0) + return AV_NOPTS_VALUE; + + ff_read_frame_flush(s); + 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->dts; + + av_free_packet(pkt); + if (pkt->flags & AV_PKT_FLAG_KEY) { + i = pkt->stream_index; + + asf_st = &asf->streams[s->streams[i]->id]; + +// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); + pos = asf_st->packet_pos; + av_assert1(pkt->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; + return pts; +} + +static int 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); + int64_t ret; + + if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) { + return ret; + } + + if ((ret = ff_get_guid(s->pb, &g)) < 0) + goto end; + + /* the data object can be followed by other top-level objects, + * skip them until the simple index object is reached */ + while (ff_guidcmp(&g, &ff_asf_simple_index_header)) { + int64_t gsize = avio_rl64(s->pb); + if (gsize < 24 || avio_feof(s->pb)) { + goto end; + } + avio_skip(s->pb, gsize - 24); + if ((ret = ff_get_guid(s->pb, &g)) < 0) + goto end; + } + + { + int64_t itime, last_pos = -1; + int pct, ict; + int i; + int64_t av_unused gsize = avio_rl64(s->pb); + if ((ret = ff_get_guid(s->pb, &g)) < 0) + goto end; + 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->internal->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 = ict > 1; + } +end: +// if (avio_feof(s->pb)) { +// ret = 0; +// } + avio_seek(s->pb, current_pos, SEEK_SET); + return ret; +} + +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]; + int ret = 0; + + if (s->packet_size <= 0) + return -1; + + /* Try using the protocol's read_seek if available */ + if (s->pb) { + int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags); + if (ret >= 0) + asf_reset_header(s); + if (ret != AVERROR(ENOSYS)) + return ret; + } + + /* explicitly handle the case of seeking to 0 */ + if (!pts) { + asf_reset_header(s); + avio_seek(s->pb, s->internal->data_offset, SEEK_SET); + return 0; + } + + if (!asf->index_read) { + ret = asf_build_simple_index(s, stream_index); + if (ret < 0) + asf->index_read = -1; + } + + if (asf->index_read > 0 && st->index_entries) { + int index = av_index_search_timestamp(st, pts, flags); + if (index >= 0) { + /* find the position */ + uint64_t 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); + skip_to_key(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); + skip_to_key(s); + return 0; +} + +AVInputFormat ff_asf_demuxer = { + .name = "asf", + .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming 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, + .priv_class = &asf_class, +}; |