| /* |
| * Windows Television (WTV) demuxer |
| * Copyright (c) 2010-2011 Peter Ross <pross@xvid.org> |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * Windows Television (WTV) demuxer |
| * @author Peter Ross <pross@xvid.org> |
| */ |
| |
| #include <inttypes.h> |
| |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/intfloat.h" |
| #include "libavutil/time_internal.h" |
| #include "avformat.h" |
| #include "internal.h" |
| #include "wtv.h" |
| #include "mpegts.h" |
| |
| /* Macros for formatting GUIDs */ |
| #define PRI_PRETTY_GUID \ |
| "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x" |
| #define ARG_PRETTY_GUID(g) \ |
| AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] |
| #define LEN_PRETTY_GUID 34 |
| |
| /* |
| * File system routines |
| */ |
| |
| typedef struct WtvFile { |
| AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */ |
| |
| int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */ |
| uint32_t *sectors; /**< file allocation table */ |
| int nb_sectors; /**< number of sectors */ |
| |
| int error; |
| int64_t position; |
| int64_t length; |
| } WtvFile; |
| |
| static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset) |
| { |
| return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET); |
| } |
| |
| /** |
| * @return bytes read, AVERROR_EOF on end of file, or <0 on error |
| */ |
| static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size) |
| { |
| WtvFile *wf = opaque; |
| AVIOContext *pb = wf->pb_filesystem; |
| int nread = 0; |
| |
| if (wf->error || pb->error) |
| return -1; |
| if (wf->position >= wf->length || avio_feof(pb)) |
| return AVERROR_EOF; |
| |
| buf_size = FFMIN(buf_size, wf->length - wf->position); |
| while(nread < buf_size) { |
| int n; |
| int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1)); |
| int read_request = FFMIN(buf_size - nread, remaining_in_sector); |
| |
| n = avio_read(pb, buf, read_request); |
| if (n <= 0) |
| break; |
| nread += n; |
| buf += n; |
| wf->position += n; |
| if (n == remaining_in_sector) { |
| int i = wf->position >> wf->sector_bits; |
| if (i >= wf->nb_sectors || |
| (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) && |
| seek_by_sector(pb, wf->sectors[i], 0) < 0)) { |
| wf->error = 1; |
| break; |
| } |
| } |
| } |
| return nread; |
| } |
| |
| /** |
| * @return position (or file length) |
| */ |
| static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence) |
| { |
| WtvFile *wf = opaque; |
| AVIOContext *pb = wf->pb_filesystem; |
| |
| if (whence == AVSEEK_SIZE) |
| return wf->length; |
| else if (whence == SEEK_CUR) |
| offset = wf->position + offset; |
| else if (whence == SEEK_END) |
| offset = wf->length; |
| |
| wf->error = offset < 0 || offset >= wf->length || |
| seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits], |
| offset & ((1 << wf->sector_bits) - 1)) < 0; |
| wf->position = offset; |
| return offset; |
| } |
| |
| /** |
| * read non-zero integers (le32) from input stream |
| * @param pb |
| * @param[out] data destination |
| * @param count maximum number of integers to read |
| * @return total number of integers read |
| */ |
| static int read_ints(AVIOContext *pb, uint32_t *data, int count) |
| { |
| int i, total = 0; |
| for (i = 0; i < count; i++) { |
| if ((data[total] = avio_rl32(pb))) |
| total++; |
| } |
| return total; |
| } |
| |
| /** |
| * Open file |
| * @param first_sector First sector |
| * @param length Length of file (bytes) |
| * @param depth File allocation table depth |
| * @return NULL on error |
| */ |
| static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s) |
| { |
| AVIOContext *pb; |
| WtvFile *wf; |
| uint8_t *buffer; |
| int64_t size; |
| |
| if (seek_by_sector(s->pb, first_sector, 0) < 0) |
| return NULL; |
| |
| wf = av_mallocz(sizeof(WtvFile)); |
| if (!wf) |
| return NULL; |
| |
| if (depth == 0) { |
| wf->sectors = av_malloc(sizeof(uint32_t)); |
| if (!wf->sectors) { |
| av_free(wf); |
| return NULL; |
| } |
| wf->sectors[0] = first_sector; |
| wf->nb_sectors = 1; |
| } else if (depth == 1) { |
| wf->sectors = av_malloc(WTV_SECTOR_SIZE); |
| if (!wf->sectors) { |
| av_free(wf); |
| return NULL; |
| } |
| wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4); |
| } else if (depth == 2) { |
| uint32_t sectors1[WTV_SECTOR_SIZE / 4]; |
| int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4); |
| int i; |
| |
| wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS); |
| if (!wf->sectors) { |
| av_free(wf); |
| return NULL; |
| } |
| wf->nb_sectors = 0; |
| for (i = 0; i < nb_sectors1; i++) { |
| if (seek_by_sector(s->pb, sectors1[i], 0) < 0) |
| break; |
| wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4); |
| } |
| } else { |
| av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth); |
| av_free(wf); |
| return NULL; |
| } |
| wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
| |
| if (!wf->nb_sectors) { |
| av_freep(&wf->sectors); |
| av_freep(&wf); |
| return NULL; |
| } |
| |
| size = avio_size(s->pb); |
| if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size) |
| av_log(s, AV_LOG_WARNING, "truncated file\n"); |
| |
| /* check length */ |
| length &= 0xFFFFFFFFFFFF; |
| if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) { |
| av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits); |
| length = (int64_t)wf->nb_sectors << wf->sector_bits; |
| } |
| wf->length = length; |
| |
| /* seek to initial sector */ |
| wf->position = 0; |
| if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) { |
| av_freep(&wf->sectors); |
| av_freep(&wf); |
| return NULL; |
| } |
| |
| wf->pb_filesystem = s->pb; |
| buffer = av_malloc(1 << wf->sector_bits); |
| if (!buffer) { |
| av_freep(&wf->sectors); |
| av_freep(&wf); |
| return NULL; |
| } |
| |
| pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf, |
| wtvfile_read_packet, NULL, wtvfile_seek); |
| if (!pb) { |
| av_freep(&buffer); |
| av_freep(&wf->sectors); |
| av_freep(&wf); |
| } |
| return pb; |
| } |
| |
| /** |
| * Open file using filename |
| * @param[in] buf directory buffer |
| * @param buf_size directory buffer size |
| * @param[in] filename |
| * @param filename_size size of filename |
| * @return NULL on error |
| */ |
| static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size) |
| { |
| const uint8_t *buf_end = buf + buf_size; |
| |
| while(buf + 48 <= buf_end) { |
| int dir_length, name_size, first_sector, depth; |
| uint64_t file_length; |
| const uint8_t *name; |
| if (ff_guidcmp(buf, ff_dir_entry_guid)) { |
| av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; " |
| "remaining directory entries ignored\n", FF_ARG_GUID(buf)); |
| break; |
| } |
| dir_length = AV_RL16(buf + 16); |
| file_length = AV_RL64(buf + 24); |
| name_size = 2 * AV_RL32(buf + 32); |
| if (name_size < 0) { |
| av_log(s, AV_LOG_ERROR, |
| "bad filename length, remaining directory entries ignored\n"); |
| break; |
| } |
| if (48 + (int64_t)name_size > buf_end - buf) { |
| av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n"); |
| break; |
| } |
| first_sector = AV_RL32(buf + 40 + name_size); |
| depth = AV_RL32(buf + 44 + name_size); |
| |
| /* compare file name; test optional null terminator */ |
| name = buf + 40; |
| if (name_size >= filename_size && |
| !memcmp(name, filename, filename_size) && |
| (name_size < filename_size + 2 || !AV_RN16(name + filename_size))) |
| return wtvfile_open_sector(first_sector, file_length, depth, s); |
| |
| buf += dir_length; |
| } |
| return 0; |
| } |
| |
| #define wtvfile_open(s, buf, buf_size, filename) \ |
| wtvfile_open2(s, buf, buf_size, filename, sizeof(filename)) |
| |
| /** |
| * Close file opened with wtvfile_open_sector(), or wtv_open() |
| */ |
| static void wtvfile_close(AVIOContext *pb) |
| { |
| WtvFile *wf = pb->opaque; |
| av_freep(&wf->sectors); |
| av_freep(&pb->opaque); |
| av_freep(&pb->buffer); |
| avio_context_free(&pb); |
| } |
| |
| /* |
| * Main demuxer |
| */ |
| |
| typedef struct WtvStream { |
| int seen_data; |
| } WtvStream; |
| |
| typedef struct WtvContext { |
| AVIOContext *pb; /**< timeline file */ |
| int64_t epoch; |
| int64_t pts; /**< pts for next data chunk */ |
| int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */ |
| |
| /* maintain private seek index, as the AVIndexEntry->pos is relative to the |
| start of the 'timeline' file, not the file system (AVFormatContext->pb) */ |
| AVIndexEntry *index_entries; |
| int nb_index_entries; |
| unsigned int index_entries_allocated_size; |
| } WtvContext; |
| |
| /* WTV GUIDs */ |
| static const ff_asf_guid EVENTID_SubtitleSpanningEvent = |
| {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; |
| static const ff_asf_guid EVENTID_LanguageSpanningEvent = |
| {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; |
| static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = |
| {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; |
| static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = |
| {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; |
| static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = |
| {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; |
| static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = |
| {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; |
| static const ff_asf_guid EVENTID_StreamIDSpanningEvent = |
| {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; |
| static const ff_asf_guid EVENTID_TeletextSpanningEvent = |
| {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; |
| static const ff_asf_guid EVENTID_AudioTypeSpanningEvent = |
| {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}; |
| |
| /* Windows media GUIDs */ |
| |
| /* Media types */ |
| static const ff_asf_guid mediasubtype_mpeg1payload = |
| {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; |
| static const ff_asf_guid mediatype_mpeg2_sections = |
| {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; |
| static const ff_asf_guid mediatype_mpeg2_pes = |
| {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
| static const ff_asf_guid mediatype_mstvcaption = |
| {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; |
| |
| /* Media subtypes */ |
| static const ff_asf_guid mediasubtype_dvb_subtitle = |
| {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; |
| static const ff_asf_guid mediasubtype_teletext = |
| {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
| static const ff_asf_guid mediasubtype_dtvccdata = |
| {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; |
| static const ff_asf_guid mediasubtype_mpeg2_sections = |
| {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; |
| |
| static int read_probe(AVProbeData *p) |
| { |
| return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
| } |
| |
| /** |
| * Convert win32 FILETIME to ISO-8601 string |
| * @return <0 on error |
| */ |
| static int filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
| { |
| time_t t = (value / 10000000LL) - 11644473600LL; |
| struct tm tmbuf; |
| struct tm *tm = gmtime_r(&t, &tmbuf); |
| if (!tm) |
| return -1; |
| if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm)) |
| return -1; |
| return 0; |
| } |
| |
| /** |
| * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string |
| * @return <0 on error |
| */ |
| static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
| { |
| time_t t = (value / 10000000LL) - 719162LL*86400LL; |
| struct tm tmbuf; |
| struct tm *tm = gmtime_r(&t, &tmbuf); |
| if (!tm) |
| return -1; |
| if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm)) |
| return -1; |
| return 0; |
| } |
| |
| /** |
| * Convert OLE DATE to ISO-8601 string |
| * @return <0 on error |
| */ |
| static int oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
| { |
| time_t t = (av_int2double(value) - 25569.0) * 86400; |
| struct tm tmbuf; |
| struct tm *tm= gmtime_r(&t, &tmbuf); |
| if (!tm) |
| return -1; |
| if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm)) |
| return -1; |
| return 0; |
| } |
| |
| static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) |
| { |
| char mime[1024]; |
| char description[1024]; |
| unsigned int filesize; |
| AVStream *st; |
| int ret; |
| int64_t pos = avio_tell(pb); |
| |
| avio_get_str16le(pb, INT_MAX, mime, sizeof(mime)); |
| if (strcmp(mime, "image/jpeg")) |
| goto done; |
| |
| avio_r8(pb); |
| avio_get_str16le(pb, INT_MAX, description, sizeof(description)); |
| filesize = avio_rl32(pb); |
| if (!filesize) |
| goto done; |
| |
| st = avformat_new_stream(s, NULL); |
| if (!st) |
| goto done; |
| av_dict_set(&st->metadata, "title", description, 0); |
| st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codecpar->codec_id = AV_CODEC_ID_MJPEG; |
| st->id = -1; |
| ret = av_get_packet(pb, &st->attached_pic, filesize); |
| if (ret < 0) |
| goto done; |
| st->attached_pic.stream_index = st->index; |
| st->attached_pic.flags |= AV_PKT_FLAG_KEY; |
| st->disposition |= AV_DISPOSITION_ATTACHED_PIC; |
| done: |
| avio_seek(pb, pos + length, SEEK_SET); |
| } |
| |
| static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length) |
| { |
| int buf_size; |
| char *buf; |
| |
| if (!strcmp(key, "WM/MediaThumbType")) { |
| avio_skip(pb, length); |
| return; |
| } |
| |
| buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; |
| buf = av_malloc(buf_size); |
| if (!buf) |
| return; |
| |
| if (type == 0 && length == 4) { |
| snprintf(buf, buf_size, "%u", avio_rl32(pb)); |
| } else if (type == 1) { |
| avio_get_str16le(pb, length, buf, buf_size); |
| if (!strlen(buf)) { |
| av_free(buf); |
| return; |
| } |
| } else if (type == 3 && length == 4) { |
| strcpy(buf, avio_rl32(pb) ? "true" : "false"); |
| } else if (type == 4 && length == 8) { |
| int64_t num = avio_rl64(pb); |
| if (!strcmp(key, "WM/EncodingTime") || |
| !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) { |
| if (filetime_to_iso8601(buf, buf_size, num) < 0) { |
| av_free(buf); |
| return; |
| } |
| } else if (!strcmp(key, "WM/WMRVEncodeTime") || |
| !strcmp(key, "WM/WMRVEndTime")) { |
| if (crazytime_to_iso8601(buf, buf_size, num) < 0) { |
| av_free(buf); |
| return; |
| } |
| } else if (!strcmp(key, "WM/WMRVExpirationDate")) { |
| if (oledate_to_iso8601(buf, buf_size, num) < 0 ) { |
| av_free(buf); |
| return; |
| } |
| } else if (!strcmp(key, "WM/WMRVBitrate")) |
| snprintf(buf, buf_size, "%f", av_int2double(num)); |
| else |
| snprintf(buf, buf_size, "%"PRIi64, num); |
| } else if (type == 5 && length == 2) { |
| snprintf(buf, buf_size, "%u", avio_rl16(pb)); |
| } else if (type == 6 && length == 16) { |
| ff_asf_guid guid; |
| avio_read(pb, guid, 16); |
| snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid)); |
| } else if (type == 2 && !strcmp(key, "WM/Picture")) { |
| get_attachment(s, pb, length); |
| av_freep(&buf); |
| return; |
| } else { |
| av_freep(&buf); |
| av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length); |
| avio_skip(pb, length); |
| return; |
| } |
| |
| av_dict_set(&s->metadata, key, buf, 0); |
| av_freep(&buf); |
| } |
| |
| /** |
| * Parse metadata entries |
| */ |
| static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb) |
| { |
| ff_asf_guid guid; |
| int length, type; |
| while(!avio_feof(pb)) { |
| char key[1024]; |
| ff_get_guid(pb, &guid); |
| type = avio_rl32(pb); |
| length = avio_rl32(pb); |
| if (!length) |
| break; |
| if (ff_guidcmp(&guid, ff_metadata_guid)) { |
| av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; " |
| "remaining metadata entries ignored\n", FF_ARG_GUID(guid)); |
| break; |
| } |
| avio_get_str16le(pb, INT_MAX, key, sizeof(key)); |
| get_tag(s, pb, key, type, length); |
| } |
| |
| ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); |
| } |
| |
| /** |
| * parse VIDEOINFOHEADER2 structure |
| * @return bytes consumed |
| */ |
| static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) |
| { |
| WtvContext *wtv = s->priv_data; |
| AVIOContext *pb = wtv->pb; |
| |
| avio_skip(pb, 72); // picture aspect ratio is unreliable |
| st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL); |
| |
| return 72 + 40; |
| } |
| |
| /** |
| * Parse MPEG1WAVEFORMATEX extradata structure |
| */ |
| static void parse_mpeg1waveformatex(AVStream *st) |
| { |
| /* fwHeadLayer */ |
| switch (AV_RL16(st->codecpar->extradata)) { |
| case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break; |
| case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break; |
| case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break; |
| } |
| |
| st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */ |
| |
| /* dwHeadMode */ |
| switch (AV_RL16(st->codecpar->extradata + 6)) { |
| case 1 : |
| case 2 : |
| case 4 : st->codecpar->channels = 2; |
| st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; |
| break; |
| case 8 : st->codecpar->channels = 1; |
| st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; |
| break; |
| } |
| } |
| |
| /** |
| * Initialise stream |
| * @param st Stream to initialise, or NULL to create and initialise new stream |
| * @return NULL on error |
| */ |
| static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
| { |
| if (st) { |
| if (st->codecpar->extradata) { |
| av_freep(&st->codecpar->extradata); |
| st->codecpar->extradata_size = 0; |
| } |
| } else { |
| WtvStream *wst = av_mallocz(sizeof(WtvStream)); |
| if (!wst) |
| return NULL; |
| st = avformat_new_stream(s, NULL); |
| if (!st) { |
| av_free(wst); |
| return NULL; |
| } |
| st->id = sid; |
| st->priv_data = wst; |
| } |
| st->codecpar->codec_type = codec_type; |
| st->need_parsing = AVSTREAM_PARSE_FULL; |
| avpriv_set_pts_info(st, 64, 1, 10000000); |
| return st; |
| } |
| |
| /** |
| * parse Media Type structure and populate stream |
| * @param st Stream, or NULL to create new stream |
| * @param mediatype Mediatype GUID |
| * @param subtype Subtype GUID |
| * @param formattype Format GUID |
| * @param size Size of format buffer |
| * @return NULL on error |
| */ |
| static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, |
| ff_asf_guid mediatype, ff_asf_guid subtype, |
| ff_asf_guid formattype, uint64_t size) |
| { |
| WtvContext *wtv = s->priv_data; |
| AVIOContext *pb = wtv->pb; |
| if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) && |
| !ff_guidcmp(formattype, ff_format_cpfilters_processed)) { |
| ff_asf_guid actual_subtype; |
| ff_asf_guid actual_formattype; |
| |
| if (size < 32) { |
| av_log(s, AV_LOG_WARNING, "format buffer size underflow\n"); |
| avio_skip(pb, size); |
| return NULL; |
| } |
| |
| avio_skip(pb, size - 32); |
| ff_get_guid(pb, &actual_subtype); |
| ff_get_guid(pb, &actual_formattype); |
| avio_seek(pb, -size, SEEK_CUR); |
| |
| st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32); |
| avio_skip(pb, 32); |
| return st; |
| } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) { |
| st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); |
| if (!st) |
| return NULL; |
| if (!ff_guidcmp(formattype, ff_format_waveformatex)) { |
| int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0); |
| if (ret < 0) |
| return NULL; |
| } else { |
| if (ff_guidcmp(formattype, ff_format_none)) |
| av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| avio_skip(pb, size); |
| } |
| |
| if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { |
| st->codecpar->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codecpar->bits_per_coded_sample); |
| } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { |
| if (st->codecpar->extradata && st->codecpar->extradata_size >= 22) |
| parse_mpeg1waveformatex(st); |
| else |
| av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n"); |
| } else { |
| st->codecpar->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype); |
| if (st->codecpar->codec_id == AV_CODEC_ID_NONE) |
| av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); |
| } |
| return st; |
| } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) { |
| st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); |
| if (!st) |
| return NULL; |
| if (!ff_guidcmp(formattype, ff_format_videoinfo2)) { |
| int consumed = parse_videoinfoheader2(s, st); |
| avio_skip(pb, FFMAX(size - consumed, 0)); |
| } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) { |
| uint64_t consumed = parse_videoinfoheader2(s, st); |
| /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */ |
| avio_skip(pb, FFMAX(size - consumed, 0)); |
| } else { |
| if (ff_guidcmp(formattype, ff_format_none)) |
| av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| avio_skip(pb, size); |
| } |
| |
| if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { |
| st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); |
| } else { |
| st->codecpar->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype); |
| } |
| if (st->codecpar->codec_id == AV_CODEC_ID_NONE) |
| av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); |
| return st; |
| } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && |
| !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { |
| st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
| if (!st) |
| return NULL; |
| if (ff_guidcmp(formattype, ff_format_none)) |
| av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| avio_skip(pb, size); |
| st->codecpar->codec_id = AV_CODEC_ID_DVB_SUBTITLE; |
| return st; |
| } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && |
| (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { |
| st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
| if (!st) |
| return NULL; |
| if (ff_guidcmp(formattype, ff_format_none)) |
| av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| avio_skip(pb, size); |
| st->codecpar->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608; |
| return st; |
| } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && |
| !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { |
| if (ff_guidcmp(formattype, ff_format_none)) |
| av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| avio_skip(pb, size); |
| return NULL; |
| } |
| |
| av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID |
| ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n", |
| FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype)); |
| avio_skip(pb, size); |
| return NULL; |
| } |
| |
| enum { |
| SEEK_TO_DATA = 0, |
| SEEK_TO_PTS, |
| }; |
| |
| /** |
| * Try to seek over a broken chunk |
| * @return <0 on error |
| */ |
| static int recover(WtvContext *wtv, uint64_t broken_pos) |
| { |
| AVIOContext *pb = wtv->pb; |
| int i; |
| for (i = 0; i < wtv->nb_index_entries; i++) { |
| if (wtv->index_entries[i].pos > broken_pos) { |
| int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); |
| if (ret < 0) |
| return ret; |
| wtv->pts = wtv->index_entries[i].timestamp; |
| return 0; |
| } |
| } |
| return AVERROR(EIO); |
| } |
| |
| /** |
| * Parse WTV chunks |
| * @param mode SEEK_TO_DATA or SEEK_TO_PTS |
| * @param seekts timestamp |
| * @param[out] len_ptr Length of data chunk |
| * @return stream index of data chunk, or <0 on error |
| */ |
| static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) |
| { |
| WtvContext *wtv = s->priv_data; |
| AVIOContext *pb = wtv->pb; |
| while (!avio_feof(pb)) { |
| ff_asf_guid g; |
| int len, sid, consumed; |
| |
| ff_get_guid(pb, &g); |
| len = avio_rl32(pb); |
| if (len < 32) { |
| int ret; |
| if (avio_feof(pb)) |
| return AVERROR_EOF; |
| av_log(s, AV_LOG_WARNING, "encountered broken chunk\n"); |
| if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0) |
| return ret; |
| continue; |
| } |
| sid = avio_rl32(pb) & 0x7FFF; |
| avio_skip(pb, 8); |
| consumed = 32; |
| |
| if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) { |
| if (ff_find_stream_index(s, sid) < 0) { |
| ff_asf_guid mediatype, subtype, formattype; |
| int size; |
| avio_skip(pb, 28); |
| ff_get_guid(pb, &mediatype); |
| ff_get_guid(pb, &subtype); |
| avio_skip(pb, 12); |
| ff_get_guid(pb, &formattype); |
| size = avio_rl32(pb); |
| parse_media_type(s, 0, sid, mediatype, subtype, formattype, size); |
| consumed += 92 + size; |
| } |
| } else if (!ff_guidcmp(g, ff_stream2_guid)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { |
| ff_asf_guid mediatype, subtype, formattype; |
| int size; |
| avio_skip(pb, 12); |
| ff_get_guid(pb, &mediatype); |
| ff_get_guid(pb, &subtype); |
| avio_skip(pb, 12); |
| ff_get_guid(pb, &formattype); |
| size = avio_rl32(pb); |
| parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); |
| consumed += 76 + size; |
| } |
| } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || |
| !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
| !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || |
| !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || |
| !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || |
| !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0) { |
| AVStream *st = s->streams[stream_index]; |
| uint8_t buf[258]; |
| const uint8_t *pbuf = buf; |
| int buf_size; |
| |
| avio_skip(pb, 8); |
| consumed += 8; |
| if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
| !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { |
| avio_skip(pb, 6); |
| consumed += 6; |
| } |
| |
| buf_size = FFMIN(len - consumed, sizeof(buf)); |
| avio_read(pb, buf, buf_size); |
| consumed += buf_size; |
| ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL); |
| } |
| } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0) { |
| AVStream *st = s->streams[stream_index]; |
| int audio_type; |
| avio_skip(pb, 8); |
| audio_type = avio_r8(pb); |
| if (audio_type == 2) |
| st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; |
| else if (audio_type == 3) |
| st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
| consumed += 9; |
| } |
| } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0) { |
| avio_skip(pb, 12); |
| if (avio_rl32(pb)) |
| av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index); |
| consumed += 16; |
| } |
| } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0) { |
| AVStream *st = s->streams[stream_index]; |
| uint8_t language[4]; |
| avio_skip(pb, 12); |
| avio_read(pb, language, 3); |
| if (language[0]) { |
| language[3] = 0; |
| av_dict_set(&st->metadata, "language", language, 0); |
| if (!strcmp(language, "nar") || !strcmp(language, "NAR")) |
| st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
| } |
| consumed += 15; |
| } |
| } else if (!ff_guidcmp(g, ff_timestamp_guid)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0) { |
| avio_skip(pb, 8); |
| wtv->pts = avio_rl64(pb); |
| consumed += 16; |
| if (wtv->pts == -1) |
| wtv->pts = AV_NOPTS_VALUE; |
| else { |
| wtv->last_valid_pts = wtv->pts; |
| if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch) |
| wtv->epoch = wtv->pts; |
| if (mode == SEEK_TO_PTS && wtv->pts >= seekts) { |
| avio_skip(pb, WTV_PAD8(len) - consumed); |
| return 0; |
| } |
| } |
| } |
| } else if (!ff_guidcmp(g, ff_data_guid)) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) { |
| WtvStream *wst = s->streams[stream_index]->priv_data; |
| wst->seen_data = 1; |
| if (len_ptr) { |
| *len_ptr = len; |
| } |
| return stream_index; |
| } |
| } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) { |
| int stream_index = ff_find_stream_index(s, sid); |
| if (stream_index >= 0) |
| av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index); |
| } else if ( |
| !ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) || |
| !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) || |
| !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) || |
| !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) || |
| !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) || |
| !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) || |
| !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) || |
| !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) || |
| !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) || |
| !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) || |
| !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) || |
| !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || |
| !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || |
| !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || |
| !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
| !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || |
| !ff_guidcmp(g, ff_index_guid) || |
| !ff_guidcmp(g, ff_sync_guid) || |
| !ff_guidcmp(g, ff_stream1_guid) || |
| !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) { |
| //ignore known guids |
| } else |
| av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g)); |
| |
| avio_skip(pb, WTV_PAD8(len) - consumed); |
| } |
| return AVERROR_EOF; |
| } |
| |
| static int read_header(AVFormatContext *s) |
| { |
| WtvContext *wtv = s->priv_data; |
| int root_sector, root_size; |
| uint8_t root[WTV_SECTOR_SIZE]; |
| AVIOContext *pb; |
| int64_t timeline_pos; |
| int64_t ret; |
| |
| wtv->epoch = |
| wtv->pts = |
| wtv->last_valid_pts = AV_NOPTS_VALUE; |
| |
| /* read root directory sector */ |
| avio_skip(s->pb, 0x30); |
| root_size = avio_rl32(s->pb); |
| if (root_size > sizeof(root)) { |
| av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| avio_skip(s->pb, 4); |
| root_sector = avio_rl32(s->pb); |
| |
| ret = seek_by_sector(s->pb, root_sector, 0); |
| if (ret < 0) |
| return ret; |
| root_size = avio_read(s->pb, root, root_size); |
| if (root_size < 0) |
| return AVERROR_INVALIDDATA; |
| |
| /* parse chunks up until first data chunk */ |
| wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16); |
| if (!wtv->pb) { |
| av_log(s, AV_LOG_ERROR, "timeline data missing\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); |
| if (ret < 0) |
| return ret; |
| avio_seek(wtv->pb, -32, SEEK_CUR); |
| |
| timeline_pos = avio_tell(s->pb); // save before opening another file |
| |
| /* read metadata */ |
| pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16); |
| if (pb) { |
| parse_legacy_attrib(s, pb); |
| wtvfile_close(pb); |
| } |
| |
| s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv |
| |
| /* read seek index */ |
| if (s->nb_streams) { |
| AVStream *st = s->streams[0]; |
| pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16); |
| if (pb) { |
| while(1) { |
| uint64_t timestamp = avio_rl64(pb); |
| uint64_t frame_nb = avio_rl64(pb); |
| if (avio_feof(pb)) |
| break; |
| ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, |
| 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); |
| } |
| wtvfile_close(pb); |
| |
| if (wtv->nb_index_entries) { |
| pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16); |
| if (pb) { |
| AVIndexEntry *e = wtv->index_entries; |
| AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1; |
| uint64_t last_position = 0; |
| while (1) { |
| uint64_t frame_nb = avio_rl64(pb); |
| uint64_t position = avio_rl64(pb); |
| while (e <= e_end && frame_nb > e->size) { |
| e->pos = last_position; |
| e++; |
| } |
| if (avio_feof(pb)) |
| break; |
| last_position = position; |
| } |
| e_end->pos = last_position; |
| wtvfile_close(pb); |
| st->duration = e_end->timestamp; |
| } |
| } |
| } |
| } |
| |
| avio_seek(s->pb, timeline_pos, SEEK_SET); |
| return 0; |
| } |
| |
| static int read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| WtvContext *wtv = s->priv_data; |
| AVIOContext *pb = wtv->pb; |
| int stream_index, len, ret; |
| |
| stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len); |
| if (stream_index < 0) |
| return stream_index; |
| |
| ret = av_get_packet(pb, pkt, len - 32); |
| if (ret < 0) |
| return ret; |
| pkt->stream_index = stream_index; |
| pkt->pts = wtv->pts; |
| avio_skip(pb, WTV_PAD8(len) - len); |
| return 0; |
| } |
| |
| static int read_seek(AVFormatContext *s, int stream_index, |
| int64_t ts, int flags) |
| { |
| WtvContext *wtv = s->priv_data; |
| AVIOContext *pb = wtv->pb; |
| AVStream *st = s->streams[0]; |
| int64_t ts_relative; |
| int i; |
| |
| if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE)) |
| return AVERROR(ENOSYS); |
| |
| /* timestamp adjustment is required because wtv->pts values are absolute, |
| * whereas AVIndexEntry->timestamp values are relative to epoch. */ |
| ts_relative = ts; |
| if (wtv->epoch != AV_NOPTS_VALUE) |
| ts_relative -= wtv->epoch; |
| |
| i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); |
| if (i < 0) { |
| if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) { |
| if (avio_seek(pb, 0, SEEK_SET) < 0) |
| return -1; |
| } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) { |
| if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0) |
| return -1; |
| } |
| if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
| return AVERROR(ERANGE); |
| return 0; |
| } |
| if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0) |
| return -1; |
| wtv->pts = wtv->index_entries[i].timestamp; |
| if (wtv->epoch != AV_NOPTS_VALUE) |
| wtv->pts += wtv->epoch; |
| wtv->last_valid_pts = wtv->pts; |
| return 0; |
| } |
| |
| static int read_close(AVFormatContext *s) |
| { |
| WtvContext *wtv = s->priv_data; |
| av_freep(&wtv->index_entries); |
| wtvfile_close(wtv->pb); |
| return 0; |
| } |
| |
| AVInputFormat ff_wtv_demuxer = { |
| .name = "wtv", |
| .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"), |
| .priv_data_size = sizeof(WtvContext), |
| .read_probe = read_probe, |
| .read_header = read_header, |
| .read_packet = read_packet, |
| .read_seek = read_seek, |
| .read_close = read_close, |
| .flags = AVFMT_SHOW_IDS, |
| }; |
