diff options
Diffstat (limited to 'libavformat/wtv.c')
| -rw-r--r-- | libavformat/wtv.c | 1128 |
1 files changed, 0 insertions, 1128 deletions
diff --git a/libavformat/wtv.c b/libavformat/wtv.c deleted file mode 100644 index 7fe737ed53..0000000000 --- a/libavformat/wtv.c +++ /dev/null @@ -1,1128 +0,0 @@ -/* - * Windows Television (WTV) demuxer - * Copyright (c) 2010-2011 Peter Ross <pross@xvid.org> - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; 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/dict.h" -#include "libavutil/time_internal.h" -#include "avformat.h" -#include "internal.h" -#include "riff.h" -#include "asf.h" -#include "mpegts.h" - -/* Macros for formating 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 - * - */ - -#define WTV_SECTOR_BITS 12 -#define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS) -#define WTV_BIGSECTOR_BITS 18 - -#define SHIFT_SECTOR_BITS(a) ((int64_t)(a) << WTV_SECTOR_BITS) - -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, SHIFT_SECTOR_BITS(sector) + offset, SEEK_SET); -} - -/** - * @return bytes read, 0 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 || pb->eof_reached) - return 0; - - 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; - - 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; - wf->sector_bits = WTV_SECTOR_BITS; - } 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); - wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; - } 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(SHIFT_SECTOR_BITS(nb_sectors1)); - 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); - } - wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; - } else { - av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth); - av_free(wf); - return NULL; - } - - if (!wf->nb_sectors) { - av_free(wf->sectors); - av_free(wf); - return NULL; - } - - /* 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_free(wf->sectors); - av_free(wf); - return NULL; - } - - wf->pb_filesystem = s->pb; - buffer = av_malloc(1 << wf->sector_bits); - if (!buffer) { - av_free(wf->sectors); - av_free(wf); - return NULL; - } - - pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf, - wtvfile_read_packet, NULL, wtvfile_seek); - if (!pb) { - av_free(buffer); - av_free(wf->sectors); - av_free(wf); - } - return pb; -} - -static const ff_asf_guid dir_entry_guid = - {0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D}; - -/** - * 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, 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 + 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_free(wf->sectors); - av_free(wf); - av_free(pb->buffer); - av_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 interative 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 wtv_guid = - {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; -static const ff_asf_guid metadata_guid = - {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53}; -static const ff_asf_guid timestamp_guid = - {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97}; -static const ff_asf_guid data_guid = - {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; -static const ff_asf_guid stream_guid = - {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE}; -static const ff_asf_guid stream2_guid = - {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; -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 mediatype_audio = - {'a','u','d','s',FF_MEDIASUBTYPE_BASE_GUID}; -static const ff_asf_guid mediatype_video = - {'v','i','d','s',FF_MEDIASUBTYPE_BASE_GUID}; -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_cpfilters_processed = - {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D}; -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}; - -/* Formats */ -static const ff_asf_guid format_cpfilters_processed = - {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A}; -static const ff_asf_guid format_waveformatex = - {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A}; -static const ff_asf_guid format_videoinfo2 = - {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; -static const ff_asf_guid format_mpeg2_video = - {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; -static const ff_asf_guid format_none = - {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96}; - -static const AVCodecGuid video_guids[] = { - {AV_CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, - {AV_CODEC_ID_NONE} -}; - -static int read_probe(AVProbeData *p) -{ - return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX; -} - -/** - * Convert win32 FILETIME to ISO-8601 string - */ -static void 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) { - if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm)) - buf[0] = '\0'; - } else - buf[0] = '\0'; -} - -/** - * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string - */ -static void 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) { - if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm)) - buf[0] = '\0'; - } else - buf[0] = '\0'; -} - -/** - * Convert OLE DATE to ISO-8601 string - */ -static void oledate_to_iso8601(char *buf, int buf_size, int64_t value) -{ - time_t t = 631112400LL + 86400*av_int2double(value); - struct tm tmbuf; - struct tm *tm = gmtime_r(&t, &tmbuf); - if (tm) { - if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm)) - buf[0] = '\0'; - } else - buf[0] = '\0'; -} - -static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) -{ - char mime[1024]; - char description[1024]; - unsigned int filesize; - AVStream *st; - 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->codec->codec_id = AV_CODEC_ID_MJPEG; - st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; - st->codec->extradata = av_mallocz(filesize); - st->id = -1; - if (!st->codec->extradata) - goto done; - st->codec->extradata_size = filesize; - avio_read(pb, st->codec->extradata, filesize); -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 = FFMAX(2*length, LEN_PRETTY_GUID) + 1; - char *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")) - filetime_to_iso8601(buf, buf_size, num); - else if (!strcmp(key, "WM/WMRVEncodeTime") || - !strcmp(key, "WM/WMRVEndTime")) - crazytime_to_iso8601(buf, buf_size, num); - else if (!strcmp(key, "WM/WMRVExpirationDate")) - oledate_to_iso8601(buf, buf_size, num); - 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(!pb->eof_reached) { - char key[1024]; - ff_get_guid(pb, &guid); - type = avio_rl32(pb); - length = avio_rl32(pb); - if (!length) - break; - if (ff_guidcmp(&guid, 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 - ff_get_bmp_header(pb, st); - - return 72 + 40; -} - -/** - * Parse MPEG1WAVEFORMATEX extradata structure - */ -static void parse_mpeg1waveformatex(AVStream *st) -{ - /* fwHeadLayer */ - switch (AV_RL16(st->codec->extradata)) { - case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break; - case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break; - case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break; - } - - st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ - - /* dwHeadMode */ - switch (AV_RL16(st->codec->extradata + 6)) { - case 1 : - case 2 : - case 4 : st->codec->channels = 2; - st->codec->channel_layout = AV_CH_LAYOUT_STEREO; - break; - case 8 : st->codec->channels = 1; - st->codec->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->codec->extradata) { - av_freep(&st->codec->extradata); - st->codec->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->codec->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, int size) -{ - WtvContext *wtv = s->priv_data; - AVIOContext *pb = wtv->pb; - if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) && - !ff_guidcmp(formattype, 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, mediatype_audio)) { - st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); - if (!st) - return NULL; - if (!ff_guidcmp(formattype, format_waveformatex)) { - int ret = ff_get_wav_header(pb, st->codec, size); - if (ret < 0) - return NULL; - } else { - if (ff_guidcmp(formattype, 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->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); - } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { - if (st->codec->extradata && st->codec->extradata_size >= 22) - parse_mpeg1waveformatex(st); - else - av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n"); - } else { - st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype); - if (st->codec->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_video)) { - st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); - if (!st) - return NULL; - if (!ff_guidcmp(formattype, format_videoinfo2)) { - int consumed = parse_videoinfoheader2(s, st); - avio_skip(pb, FFMAX(size - consumed, 0)); - } else if (!ff_guidcmp(formattype, format_mpeg2_video)) { - int consumed = parse_videoinfoheader2(s, st); - avio_skip(pb, FFMAX(size - consumed, 0)); - } else { - if (ff_guidcmp(formattype, 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->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); - } else { - st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype); - } - if (st->codec->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, format_none)) - av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); - avio_skip(pb, size); - st->codec->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, format_none)) - av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); - avio_skip(pb, size); - st->codec->codec_id = AV_CODEC_ID_DVB_TELETEXT; - return st; - } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && - !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { - if (ff_guidcmp(formattype, 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, -}; - -/** - * 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 (!pb->eof_reached) { - ff_asf_guid g; - int len, sid, consumed; - - ff_get_guid(pb, &g); - len = avio_rl32(pb); - if (len < 32) - break; - sid = avio_rl32(pb) & 0x7FFF; - avio_skip(pb, 8); - consumed = 32; - - if (!ff_guidcmp(g, stream_guid)) { - 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, stream2_guid)) { - int stream_index = ff_find_stream_index(s, sid); - if (stream_index >= 0 && !((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, 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) { -#define WTV_PAD8(x) (((x) + 7) & ~7) - avio_skip(pb, WTV_PAD8(len) - consumed); - return 0; - } - } - } - } else if (!ff_guidcmp(g, data_guid)) { - int stream_index = ff_find_stream_index(s, sid); - if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) { - 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_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_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 */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) || - !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, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || - !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || - !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { - //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; -} - -/* declare utf16le strings */ -#define _ , 0, -static const uint8_t timeline_le16[] = - {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0}; -static const uint8_t table_0_entries_legacy_attrib_le16[] = - {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0}; -static const uint8_t table_0_entries_time_le16[] = - {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0}; -static const uint8_t timeline_table_0_entries_Events_le16[] = - {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0}; -#undef _ - -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; - int 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, 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, table_0_entries_legacy_attrib_le16); - if (pb) { - parse_legacy_attrib(s, pb); - wtvfile_close(pb); - } - - /* read seek index */ - if (s->nb_streams) { - AVStream *st = s->streams[0]; - pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16); - if (pb) { - while(1) { - uint64_t timestamp = avio_rl64(pb); - uint64_t frame_nb = avio_rl64(pb); - if (pb->eof_reached) - 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, timeline_table_0_entries_Events_le16); - if (pb) { - int i; - while (1) { - uint64_t frame_nb = avio_rl64(pb); - uint64_t position = avio_rl64(pb); - if (pb->eof_reached) - break; - for (i = wtv->nb_index_entries - 1; i >= 0; i--) { - AVIndexEntry *e = wtv->index_entries + i; - if (frame_nb > e->size) - break; - if (position > e->pos) - e->pos = position; - } - } - wtvfile_close(pb); - st->duration = wtv->index_entries[wtv->nb_index_entries - 1].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) - avio_seek(pb, 0, SEEK_SET); - else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) - avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET); - if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) - return AVERROR(ERANGE); - return 0; - } - wtv->pts = wtv->index_entries[i].timestamp; - if (wtv->epoch != AV_NOPTS_VALUE) - wtv->pts += wtv->epoch; - wtv->last_valid_pts = wtv->pts; - avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); - return 0; -} - -static int read_close(AVFormatContext *s) -{ - WtvContext *wtv = s->priv_data; - av_free(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, -}; 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