diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/asf.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/asf.c | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/asf.c b/contrib/ffmpeg/libavformat/asf.c new file mode 100644 index 000000000..f63e4b695 --- /dev/null +++ b/contrib/ffmpeg/libavformat/asf.c @@ -0,0 +1,951 @@ +/* + * 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 "avformat.h" +#include "riff.h" +#include "mpegaudio.h" +#include "asf.h" +#include "common.h" + +#undef NDEBUG +#include <assert.h> + +#define FRAME_HEADER_SIZE 17 +// Fix Me! FRAME_HEADER_SIZE may be different. + +static const GUID index_guid = { + 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb }, +}; + +/**********************************/ +/* decoding */ + +//#define DEBUG + +#ifdef DEBUG +#define PRINT_IF_GUID(g,cmp) \ +if (!memcmp(g, &cmp, sizeof(GUID))) \ + printf("(GUID: %s) ", #cmp) + +static void print_guid(const GUID *g) +{ + int i; + PRINT_IF_GUID(g, asf_header); + else PRINT_IF_GUID(g, file_header); + else PRINT_IF_GUID(g, stream_header); + else PRINT_IF_GUID(g, audio_stream); + else PRINT_IF_GUID(g, audio_conceal_none); + else PRINT_IF_GUID(g, video_stream); + else PRINT_IF_GUID(g, video_conceal_none); + else PRINT_IF_GUID(g, command_stream); + else PRINT_IF_GUID(g, comment_header); + else PRINT_IF_GUID(g, codec_comment_header); + else PRINT_IF_GUID(g, codec_comment1_header); + else PRINT_IF_GUID(g, data_header); + else PRINT_IF_GUID(g, index_guid); + else PRINT_IF_GUID(g, head1_guid); + else PRINT_IF_GUID(g, head2_guid); + else PRINT_IF_GUID(g, my_guid); + else PRINT_IF_GUID(g, ext_stream_header); + else PRINT_IF_GUID(g, extended_content_header); + else PRINT_IF_GUID(g, ext_stream_embed_stream_header); + else PRINT_IF_GUID(g, ext_stream_audio_stream); + else + printf("(GUID: unknown) "); + printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3); + for(i=0;i<8;i++) + printf(" 0x%02x,", g->v4[i]); + printf("}\n"); +} +#undef PRINT_IF_GUID +#endif + +static void get_guid(ByteIOContext *s, GUID *g) +{ + int i; + + g->v1 = get_le32(s); + g->v2 = get_le16(s); + g->v3 = get_le16(s); + for(i=0;i<8;i++) + g->v4[i] = get_byte(s); +} + +#if 0 +static void get_str16(ByteIOContext *pb, char *buf, int buf_size) +{ + int len, c; + char *q; + + len = get_le16(pb); + q = buf; + while (len > 0) { + c = get_le16(pb); + if ((q - buf) < buf_size - 1) + *q++ = c; + len--; + } + *q = '\0'; +} +#endif + +static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size) +{ + char* q = buf; + len /= 2; + while (len--) { + uint8_t tmp; + PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;) + } + *q = '\0'; +} + +static int asf_probe(AVProbeData *pd) +{ + GUID g; + const unsigned char *p; + int i; + + /* check file header */ + if (pd->buf_size <= 32) + return 0; + p = pd->buf; + g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); + p += 4; + g.v2 = p[0] | (p[1] << 8); + p += 2; + g.v3 = p[0] | (p[1] << 8); + p += 2; + for(i=0;i<8;i++) + g.v4[i] = *p++; + + if (!memcmp(&g, &asf_header, sizeof(GUID))) + return AVPROBE_SCORE_MAX; + else + return 0; +} + +static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) +{ + ASFContext *asf = s->priv_data; + GUID g; + ByteIOContext *pb = &s->pb; + AVStream *st; + ASFStream *asf_st; + int size, i; + int64_t gsize; + + get_guid(pb, &g); + if (memcmp(&g, &asf_header, sizeof(GUID))) + goto fail; + get_le64(pb); + get_le32(pb); + get_byte(pb); + get_byte(pb); + memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); + for(;;) { + get_guid(pb, &g); + gsize = get_le64(pb); +#ifdef DEBUG + printf("%08"PRIx64": ", url_ftell(pb) - 24); + print_guid(&g); + printf(" size=0x%"PRIx64"\n", gsize); +#endif + if (gsize < 24) + goto fail; + if (!memcmp(&g, &file_header, sizeof(GUID))) { + get_guid(pb, &asf->hdr.guid); + asf->hdr.file_size = get_le64(pb); + asf->hdr.create_time = get_le64(pb); + asf->hdr.packets_count = get_le64(pb); + asf->hdr.send_time = get_le64(pb); + asf->hdr.play_time = get_le64(pb); + asf->hdr.preroll = get_le32(pb); + asf->hdr.ignore = get_le32(pb); + asf->hdr.flags = get_le32(pb); + asf->hdr.min_pktsize = get_le32(pb); + asf->hdr.max_pktsize = get_le32(pb); + asf->hdr.max_bitrate = get_le32(pb); + asf->packet_size = asf->hdr.max_pktsize; + asf->nb_packets = asf->hdr.packets_count; + } else if (!memcmp(&g, &stream_header, sizeof(GUID))) { + int type, type_specific_size, sizeX; + uint64_t total_size; + unsigned int tag1; + int64_t pos1, pos2; + int test_for_ext_stream_audio; + + pos1 = url_ftell(pb); + + st = av_new_stream(s, 0); + if (!st) + goto fail; + av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ + asf_st = av_mallocz(sizeof(ASFStream)); + if (!asf_st) + goto fail; + st->priv_data = asf_st; + st->start_time = asf->hdr.preroll; + st->duration = asf->hdr.send_time / + (10000000 / 1000) - st->start_time; + get_guid(pb, &g); + + test_for_ext_stream_audio = 0; + if (!memcmp(&g, &audio_stream, sizeof(GUID))) { + type = CODEC_TYPE_AUDIO; + } else if (!memcmp(&g, &video_stream, sizeof(GUID))) { + type = CODEC_TYPE_VIDEO; + } else if (!memcmp(&g, &command_stream, sizeof(GUID))) { + type = CODEC_TYPE_UNKNOWN; + } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) { + test_for_ext_stream_audio = 1; + type = CODEC_TYPE_UNKNOWN; + } else { + goto fail; + } + get_guid(pb, &g); + total_size = get_le64(pb); + type_specific_size = get_le32(pb); + get_le32(pb); + st->id = get_le16(pb) & 0x7f; /* stream id */ + // mapping of asf ID to AV stream ID; + asf->asfid2avid[st->id] = s->nb_streams - 1; + + get_le32(pb); + + if (test_for_ext_stream_audio) { + get_guid(pb, &g); + if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) { + type = CODEC_TYPE_AUDIO; + get_guid(pb, &g); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_guid(pb, &g); + get_le32(pb); + } + } + + st->codec->codec_type = type; + if (type == CODEC_TYPE_AUDIO) { + get_wav_header(pb, st->codec, type_specific_size); + st->need_parsing = 1; + /* We have to init the frame size at some point .... */ + pos2 = url_ftell(pb); + if (gsize > (pos2 + 8 - pos1 + 24)) { + asf_st->ds_span = get_byte(pb); + asf_st->ds_packet_size = get_le16(pb); + asf_st->ds_chunk_size = get_le16(pb); + asf_st->ds_data_size = get_le16(pb); + asf_st->ds_silence_data = get_byte(pb); + } + //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", + // asf_st->ds_packet_size, asf_st->ds_chunk_size, + // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); + if (asf_st->ds_span > 1) { + if (!asf_st->ds_chunk_size + || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)) + asf_st->ds_span = 0; // disable descrambling + } + switch (st->codec->codec_id) { + case CODEC_ID_MP3: + st->codec->frame_size = MPA_FRAME_SIZE; + break; + case CODEC_ID_PCM_S16LE: + case CODEC_ID_PCM_S16BE: + case CODEC_ID_PCM_U16LE: + case CODEC_ID_PCM_U16BE: + case CODEC_ID_PCM_S8: + case CODEC_ID_PCM_U8: + case CODEC_ID_PCM_ALAW: + case CODEC_ID_PCM_MULAW: + st->codec->frame_size = 1; + break; + default: + /* This is probably wrong, but it prevents a crash later */ + st->codec->frame_size = 1; + break; + } + } else if (type == CODEC_TYPE_VIDEO) { + get_le32(pb); + get_le32(pb); + get_byte(pb); + size = get_le16(pb); /* size */ + sizeX= get_le32(pb); /* size */ + st->codec->width = get_le32(pb); + st->codec->height = get_le32(pb); + /* not available for asf */ + get_le16(pb); /* panes */ + st->codec->bits_per_sample = get_le16(pb); /* depth */ + tag1 = get_le32(pb); + url_fskip(pb, 20); +// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); + size= sizeX; + if (size > 40) { + st->codec->extradata_size = size - 40; + st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); + get_buffer(pb, st->codec->extradata, st->codec->extradata_size); + } + + /* Extract palette from extradata if bpp <= 8 */ + /* This code assumes that extradata contains only palette */ + /* This is true for all paletted codecs implemented in ffmpeg */ + if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) { + st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl)); +#ifdef WORDS_BIGENDIAN + for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) + st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]); +#else + memcpy(st->codec->palctrl->palette, st->codec->extradata, + FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); +#endif + st->codec->palctrl->palette_changed = 1; + } + + st->codec->codec_tag = tag1; + st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1); + if(tag1 == MKTAG('D', 'V', 'R', ' ')) + st->need_parsing = 1; + } + pos2 = url_ftell(pb); + url_fskip(pb, gsize - (pos2 - pos1 + 24)); + } else if (!memcmp(&g, &data_header, sizeof(GUID))) { + asf->data_object_offset = url_ftell(pb); + if (gsize != (uint64_t)-1 && gsize >= 24) { + asf->data_object_size = gsize - 24; + } else { + asf->data_object_size = (uint64_t)-1; + } + break; + } else if (!memcmp(&g, &comment_header, sizeof(GUID))) { + int len1, len2, len3, len4, len5; + + len1 = get_le16(pb); + len2 = get_le16(pb); + len3 = get_le16(pb); + len4 = get_le16(pb); + len5 = get_le16(pb); + get_str16_nolen(pb, len1, s->title, sizeof(s->title)); + get_str16_nolen(pb, len2, s->author, sizeof(s->author)); + get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright)); + get_str16_nolen(pb, len4, s->comment, sizeof(s->comment)); + url_fskip(pb, len5); + } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) { + int desc_count, i; + + desc_count = get_le16(pb); + for(i=0;i<desc_count;i++) + { + int name_len,value_type,value_len; + uint64_t value_num = 0; + char *name, *value; + + name_len = get_le16(pb); + name = (char *)av_malloc(name_len * 2); + get_str16_nolen(pb, name_len, name, name_len * 2); + value_type = get_le16(pb); + value_len = get_le16(pb); + if ((value_type == 0) || (value_type == 1)) // unicode or byte + { + value = (char *)av_malloc(value_len * 2); + get_str16_nolen(pb, value_len, value, + value_len * 2); + if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); } + av_free(value); + } + if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD + { + if (value_type==2) value_num = get_le32(pb); + if (value_type==3) value_num = get_le32(pb); + if (value_type==4) value_num = get_le64(pb); + if (value_type==5) value_num = get_le16(pb); + if (strcmp(name,"WM/Track")==0) s->track = value_num + 1; + if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num; + } + av_free(name); + } + } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) { + int ext_len, payload_ext_ct, stream_ct; + uint32_t ext_d; + int64_t pos_ex_st; + pos_ex_st = url_ftell(pb); + + get_le64(pb); + get_le64(pb); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_le32(pb); + get_le16(pb); + get_le16(pb); + get_le64(pb); + stream_ct = get_le16(pb); + payload_ext_ct = get_le16(pb); + + for (i=0; i<stream_ct; i++){ + get_le16(pb); + ext_len = get_le16(pb); + url_fseek(pb, ext_len, SEEK_CUR); + } + + for (i=0; i<payload_ext_ct; i++){ + get_guid(pb, &g); + ext_d=get_le16(pb); + ext_len=get_le32(pb); + url_fseek(pb, ext_len, SEEK_CUR); + } + + // there could be a optional stream properties object to follow + // if so the next iteration will pick it up + } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) { + int v1, v2; + get_guid(pb, &g); + v1 = get_le32(pb); + v2 = get_le16(pb); +#if 0 + } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) { + int len, v1, n, num; + char str[256], *q; + char tag[16]; + + get_guid(pb, &g); + print_guid(&g); + + n = get_le32(pb); + for(i=0;i<n;i++) { + num = get_le16(pb); /* stream number */ + get_str16(pb, str, sizeof(str)); + get_str16(pb, str, sizeof(str)); + len = get_le16(pb); + q = tag; + while (len > 0) { + v1 = get_byte(pb); + if ((q - tag) < sizeof(tag) - 1) + *q++ = v1; + len--; + } + *q = '\0'; + } +#endif + } else if (url_feof(pb)) { + goto fail; + } else { + url_fseek(pb, gsize - 24, SEEK_CUR); + } + } + get_guid(pb, &g); + get_le64(pb); + get_byte(pb); + get_byte(pb); + if (url_feof(pb)) + goto fail; + asf->data_offset = url_ftell(pb); + asf->packet_size_left = 0; + + return 0; + + fail: + for(i=0;i<s->nb_streams;i++) { + AVStream *st = s->streams[i]; + if (st) { + av_free(st->priv_data); + av_free(st->codec->extradata); + } + av_free(st); + } + return -1; +} + +#define DO_2BITS(bits, var, defval) \ + switch (bits & 3) \ + { \ + case 3: var = get_le32(pb); rsize += 4; break; \ + case 2: var = get_le16(pb); rsize += 2; break; \ + case 1: var = get_byte(pb); rsize++; break; \ + default: var = defval; break; \ + } + +static int asf_get_packet(AVFormatContext *s) +{ + ASFContext *asf = s->priv_data; + ByteIOContext *pb = &s->pb; + uint32_t packet_length, padsize; + int rsize = 9; + int c; + + assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0); + + c = get_byte(pb); + if (c != 0x82) { + if (!url_feof(pb)) + av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb)); + } + if ((c & 0x0f) == 2) { // always true for now + if (get_le16(pb) != 0) { + if (!url_feof(pb)) + av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); + return AVERROR_IO; + } + rsize+=2; +/* }else{ + if (!url_feof(pb)) + printf("ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb)); + return AVERROR_IO;*/ + } + + asf->packet_flags = get_byte(pb); + asf->packet_property = get_byte(pb); + + DO_2BITS(asf->packet_flags >> 5, packet_length, asf->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 >= (1U<<29)){ + av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb)); + return 0; // FIXME this should be -1 + } + if(padsize >= (1U<<29)){ + av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb)); + return 0; // FIXME this should be -1 + } + + asf->packet_timestamp = get_le32(pb); + get_le16(pb); /* duration */ + // rsize has at least 11 bytes which have to be present + + if (asf->packet_flags & 0x01) { + asf->packet_segsizetype = get_byte(pb); rsize++; + asf->packet_segments = asf->packet_segsizetype & 0x3f; + } else { + asf->packet_segments = 1; + asf->packet_segsizetype = 0x80; + } + asf->packet_size_left = packet_length - padsize - rsize; + if (packet_length < asf->hdr.min_pktsize) + padsize += asf->hdr.min_pktsize - packet_length; + asf->packet_padsize = padsize; +#ifdef DEBUG + printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left); +#endif + return 0; +} + +static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + ASFContext *asf = s->priv_data; + ASFStream *asf_st = 0; + ByteIOContext *pb = &s->pb; + //static int pc = 0; + for (;;) { + int rsize = 0; + if (asf->packet_size_left < FRAME_HEADER_SIZE + || asf->packet_segments < 1) { + //asf->packet_size_left <= asf->packet_padsize) { + int ret = asf->packet_size_left + asf->packet_padsize; + //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb)); + if((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size) + ret += asf->packet_size - ((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size); + assert(ret>=0); + /* fail safe */ + url_fskip(pb, ret); + asf->packet_pos= url_ftell(&s->pb); + if (asf->data_object_size != (uint64_t)-1 && + (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) + return AVERROR_IO; /* Do not exceed the size of the data object */ + ret = asf_get_packet(s); + //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++); + if (ret < 0 || url_feof(pb)) + return AVERROR_IO; + asf->packet_time_start = 0; + continue; + } + if (asf->packet_time_start == 0) { + /* read frame header */ + int num = get_byte(pb); + asf->packet_segments--; + rsize++; + asf->packet_key_frame = (num & 0x80) >> 7; + asf->stream_index = asf->asfid2avid[num & 0x7f]; + // sequence should be ignored! + DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); + DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); + DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); +//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size); + if (asf->packet_replic_size > 1) { + assert(asf->packet_replic_size >= 8); + // it should be always at least 8 bytes - FIXME validate + asf->packet_obj_size = get_le32(pb); + asf->packet_frag_timestamp = get_le32(pb); // timestamp + if (asf->packet_replic_size > 8) + url_fskip(pb, asf->packet_replic_size - 8); + rsize += asf->packet_replic_size; // FIXME - check validity + } else if (asf->packet_replic_size==1){ + // multipacket - frag_offset is begining 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 = get_byte(pb); + rsize++; + }else{ + assert(asf->packet_replic_size==0); + } + if (asf->packet_flags & 0x01) { + DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal +#undef DO_2BITS + //printf("Fragsize %d\n", asf->packet_frag_size); + } else { + asf->packet_frag_size = asf->packet_size_left - rsize; + //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize); + } + if (asf->packet_replic_size == 1) { + asf->packet_multi_size = asf->packet_frag_size; + if (asf->packet_multi_size > asf->packet_size_left) { + asf->packet_segments = 0; + continue; + } + } + asf->packet_size_left -= rsize; + //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize); + + if (asf->stream_index < 0 + || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL + || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) + ) { + asf->packet_time_start = 0; + /* unhandled packet (should not happen) */ + url_fskip(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 %d\n", asf->packet_frag_size, num & 0x7f); + continue; + } + asf->asf_st = s->streams[asf->stream_index]->priv_data; + } + asf_st = asf->asf_st; + + if ((asf->packet_frag_offset != asf_st->frag_offset + || (asf->packet_frag_offset + && asf->packet_seq != asf_st->seq)) // seq should be ignored + ) { + /* cannot continue current packet: free it */ + // FIXME better check if packet was already allocated + av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n", + asf_st->pkt.size, + asf->packet_obj_size, + asf->packet_frag_offset, asf_st->frag_offset, + asf->packet_seq, asf_st->seq, asf->packet_frag_size); + if (asf_st->pkt.size) + av_free_packet(&asf_st->pkt); + asf_st->frag_offset = 0; + if (asf->packet_frag_offset != 0) { + url_fskip(pb, asf->packet_frag_size); + av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", 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 begining timestamp + asf->packet_frag_timestamp = asf->packet_time_start; + asf->packet_time_start += asf->packet_time_delta; + asf->packet_obj_size = asf->packet_frag_size = get_byte(pb); + asf->packet_size_left--; + asf->packet_multi_size--; + if (asf->packet_multi_size < asf->packet_obj_size) + { + asf->packet_time_start = 0; + url_fskip(pb, asf->packet_multi_size); + asf->packet_size_left -= asf->packet_multi_size; + continue; + } + asf->packet_multi_size -= asf->packet_obj_size; + //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size); + } + if (asf_st->frag_offset == 0) { + /* new packet */ + av_new_packet(&asf_st->pkt, asf->packet_obj_size); + asf_st->seq = asf->packet_seq; + asf_st->pkt.pts = asf->packet_frag_timestamp; + asf_st->pkt.stream_index = asf->stream_index; + asf_st->pkt.pos = + asf_st->packet_pos= asf->packet_pos; +//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", +//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY, +//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size); + if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO) + asf->packet_key_frame = 1; + if (asf->packet_key_frame) + asf_st->pkt.flags |= PKT_FLAG_KEY; + } + + /* read data */ + //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", + // asf->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; + get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset, + asf->packet_frag_size); + asf_st->frag_offset += asf->packet_frag_size; + /* test if whole packet is read */ + if (asf_st->frag_offset == asf_st->pkt.size) { + /* return packet */ + if (asf_st->ds_span > 1) { + /* packet descrambling */ + uint8_t *newdata = av_malloc(asf_st->pkt.size); + if (newdata) { + int offset = 0; + while (offset < asf_st->pkt.size) { + int off = offset / asf_st->ds_chunk_size; + int row = off / asf_st->ds_span; + int col = off % asf_st->ds_span; + int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; + //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx); + memcpy(newdata + offset, + asf_st->pkt.data + idx * asf_st->ds_chunk_size, + asf_st->ds_chunk_size); + offset += asf_st->ds_chunk_size; + } + av_free(asf_st->pkt.data); + asf_st->pkt.data = newdata; + } + } + asf_st->frag_offset = 0; + memcpy(pkt, &asf_st->pkt, sizeof(AVPacket)); + //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size); + asf_st->pkt.size = 0; + asf_st->pkt.data = 0; + break; // packet completed + } + } + return 0; +} + +static int asf_read_close(AVFormatContext *s) +{ + int i; + + for(i=0;i<s->nb_streams;i++) { + AVStream *st = s->streams[i]; + av_free(st->priv_data); + av_free(st->codec->palctrl); + } + return 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_nb_frames = 0; + asf->packet_timestamp_start = -1; + asf->packet_timestamp_end = -1; + asf->packet_size_left = 0; + asf->packet_segments = 0; + asf->packet_flags = 0; + asf->packet_property = 0; + asf->packet_timestamp = 0; + asf->packet_segsizetype = 0; + asf->packet_segments = 0; + asf->packet_seq = 0; + asf->packet_replic_size = 0; + asf->packet_key_frame = 0; + asf->packet_padsize = 0; + asf->packet_frag_offset = 0; + asf->packet_frag_size = 0; + asf->packet_frag_timestamp = 0; + asf->packet_multi_size = 0; + asf->packet_obj_size = 0; + asf->packet_time_delta = 0; + asf->packet_time_start = 0; + + for(i=0; i<s->nb_streams; i++){ + asf_st= s->streams[i]->priv_data; + av_free_packet(&asf_st->pkt); + asf_st->frag_offset=0; + asf_st->seq=0; + } + asf->asf_st= NULL; +} + +static 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[s->nb_streams]; + + for(i=0; i<s->nb_streams; i++){ + start_pos[i]= pos; + } + + pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset; + *ppos= pos; + url_fseek(&s->pb, pos, SEEK_SET); + +//printf("asf_read_pts\n"); + asf_reset_header(s); + for(;;){ + if (av_read_frame(s, pkt) < 0){ + av_log(s, AV_LOG_INFO, "seek failed\n"); + return AV_NOPTS_VALUE; + } + + pts= pkt->pts; + + av_free_packet(pkt); + if(pkt->flags&PKT_FLAG_KEY){ + i= pkt->stream_index; + + asf_st= s->streams[i]->priv_data; + + assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0); + pos= asf_st->packet_pos; + + av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); + start_pos[i]= asf_st->packet_pos + 1; + + if(pkt->stream_index == stream_index) + break; + } + } + + *ppos= pos; +//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); + + return pts; +} + +static void asf_build_simple_index(AVFormatContext *s, int stream_index) +{ + GUID g; + ASFContext *asf = s->priv_data; + int64_t gsize, itime; + int64_t pos, current_pos, index_pts; + int i; + int pct,ict; + + current_pos = url_ftell(&s->pb); + + url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); + get_guid(&s->pb, &g); + if (!memcmp(&g, &index_guid, sizeof(GUID))) { + gsize = get_le64(&s->pb); + get_guid(&s->pb, &g); + itime=get_le64(&s->pb); + pct=get_le32(&s->pb); + ict=get_le32(&s->pb); + av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); + + for (i=0;i<ict;i++){ + int pktnum=get_le32(&s->pb); + int pktct =get_le16(&s->pb); + av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct); + + pos=s->data_offset + asf->packet_size*(int64_t)pktnum; + index_pts=av_rescale(itime, i, 10000); + + av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME); + } + asf->index_read= 1; + } + url_fseek(&s->pb, current_pos, SEEK_SET); +} + +static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) +{ + ASFContext *asf = s->priv_data; + AVStream *st = s->streams[stream_index]; + int64_t pos; + int index; + + if (asf->packet_size <= 0) + return -1; + + if (!asf->index_read) + asf_build_simple_index(s, stream_index); + + if(!(asf->index_read && st->index_entries)){ + if(av_seek_frame_binary(s, stream_index, pts, flags)<0) + return -1; + }else{ + index= av_index_search_timestamp(st, pts, flags); + if(index<0) + return -1; + + /* find the position */ + pos = st->index_entries[index].pos; + pts = st->index_entries[index].timestamp; + + // various attempts to find key frame have failed so far + // asf_reset_header(s); + // url_fseek(&s->pb, pos, SEEK_SET); + // key_pos = pos; + // for(i=0;i<16;i++){ + // pos = url_ftell(&s->pb); + // if (av_read_frame(s, &pkt) < 0){ + // av_log(s, AV_LOG_INFO, "seek failed\n"); + // return -1; + // } + // asf_st = s->streams[stream_index]->priv_data; + // pos += st->parser->frame_offset; + // + // if (pkt.size > b) { + // b = pkt.size; + // key_pos = pos; + // } + // + // av_free_packet(&pkt); + // } + + /* do the seek */ + av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); + url_fseek(&s->pb, pos, SEEK_SET); + } + asf_reset_header(s); + return 0; +} + +AVInputFormat asf_demuxer = { + "asf", + "asf format", + sizeof(ASFContext), + asf_probe, + asf_read_header, + asf_read_packet, + asf_read_close, + asf_read_seek, + asf_read_pts, +}; |