| 1 | /*
|
|---|
| 2 | * ASF compatible decoder.
|
|---|
| 3 | * Copyright (c) 2000, 2001 Fabrice Bellard.
|
|---|
| 4 | *
|
|---|
| 5 | * This library is free software; you can redistribute it and/or
|
|---|
| 6 | * modify it under the terms of the GNU Lesser General Public
|
|---|
| 7 | * License as published by the Free Software Foundation; either
|
|---|
| 8 | * version 2 of the License, or (at your option) any later version.
|
|---|
| 9 | *
|
|---|
| 10 | * This library is distributed in the hope that it will be useful,
|
|---|
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 13 | * Lesser General Public License for more details.
|
|---|
| 14 | *
|
|---|
| 15 | * You should have received a copy of the GNU Lesser General Public
|
|---|
| 16 | * License along with this library; if not, write to the Free Software
|
|---|
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|---|
| 18 | */
|
|---|
| 19 | #include "avformat.h"
|
|---|
| 20 | #include "avi.h"
|
|---|
| 21 | #include "mpegaudio.h"
|
|---|
| 22 | #include "asf.h"
|
|---|
| 23 |
|
|---|
| 24 | #undef NDEBUG
|
|---|
| 25 | #include <assert.h>
|
|---|
| 26 |
|
|---|
| 27 | #define FRAME_HEADER_SIZE 17
|
|---|
| 28 | // Fix Me! FRAME_HEADER_SIZE may be different.
|
|---|
| 29 |
|
|---|
| 30 | static const GUID index_guid = {
|
|---|
| 31 | 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
|
|---|
| 32 | };
|
|---|
| 33 |
|
|---|
| 34 | /**********************************/
|
|---|
| 35 | /* decoding */
|
|---|
| 36 |
|
|---|
| 37 | //#define DEBUG
|
|---|
| 38 |
|
|---|
| 39 | #ifdef DEBUG
|
|---|
| 40 | #define PRINT_IF_GUID(g,cmp) \
|
|---|
| 41 | if (!memcmp(g, &cmp, sizeof(GUID))) \
|
|---|
| 42 | printf("(GUID: %s) ", #cmp)
|
|---|
| 43 |
|
|---|
| 44 | static void print_guid(const GUID *g)
|
|---|
| 45 | {
|
|---|
| 46 | int i;
|
|---|
| 47 | PRINT_IF_GUID(g, asf_header);
|
|---|
| 48 | else PRINT_IF_GUID(g, file_header);
|
|---|
| 49 | else PRINT_IF_GUID(g, stream_header);
|
|---|
| 50 | else PRINT_IF_GUID(g, audio_stream);
|
|---|
| 51 | else PRINT_IF_GUID(g, audio_conceal_none);
|
|---|
| 52 | else PRINT_IF_GUID(g, video_stream);
|
|---|
| 53 | else PRINT_IF_GUID(g, video_conceal_none);
|
|---|
| 54 | else PRINT_IF_GUID(g, command_stream);
|
|---|
| 55 | else PRINT_IF_GUID(g, comment_header);
|
|---|
| 56 | else PRINT_IF_GUID(g, codec_comment_header);
|
|---|
| 57 | else PRINT_IF_GUID(g, codec_comment1_header);
|
|---|
| 58 | else PRINT_IF_GUID(g, data_header);
|
|---|
| 59 | else PRINT_IF_GUID(g, index_guid);
|
|---|
| 60 | else PRINT_IF_GUID(g, head1_guid);
|
|---|
| 61 | else PRINT_IF_GUID(g, head2_guid);
|
|---|
| 62 | else PRINT_IF_GUID(g, my_guid);
|
|---|
| 63 | else PRINT_IF_GUID(g, ext_stream_header);
|
|---|
| 64 | else PRINT_IF_GUID(g, extended_content_header);
|
|---|
| 65 | else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
|
|---|
| 66 | else PRINT_IF_GUID(g, ext_stream_audio_stream);
|
|---|
| 67 | else
|
|---|
| 68 | printf("(GUID: unknown) ");
|
|---|
| 69 | printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
|
|---|
| 70 | for(i=0;i<8;i++)
|
|---|
| 71 | printf(" 0x%02x,", g->v4[i]);
|
|---|
| 72 | printf("}\n");
|
|---|
| 73 | }
|
|---|
| 74 | #undef PRINT_IF_GUID
|
|---|
| 75 | #endif
|
|---|
| 76 |
|
|---|
| 77 | static void get_guid(ByteIOContext *s, GUID *g)
|
|---|
| 78 | {
|
|---|
| 79 | int i;
|
|---|
| 80 |
|
|---|
| 81 | g->v1 = get_le32(s);
|
|---|
| 82 | g->v2 = get_le16(s);
|
|---|
| 83 | g->v3 = get_le16(s);
|
|---|
| 84 | for(i=0;i<8;i++)
|
|---|
| 85 | g->v4[i] = get_byte(s);
|
|---|
| 86 | }
|
|---|
| 87 |
|
|---|
| 88 | #if 0
|
|---|
| 89 | static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
|
|---|
| 90 | {
|
|---|
| 91 | int len, c;
|
|---|
| 92 | char *q;
|
|---|
| 93 |
|
|---|
| 94 | len = get_le16(pb);
|
|---|
| 95 | q = buf;
|
|---|
| 96 | while (len > 0) {
|
|---|
| 97 | c = get_le16(pb);
|
|---|
| 98 | if ((q - buf) < buf_size - 1)
|
|---|
| 99 | *q++ = c;
|
|---|
| 100 | len--;
|
|---|
| 101 | }
|
|---|
| 102 | *q = '\0';
|
|---|
| 103 | }
|
|---|
| 104 | #endif
|
|---|
| 105 |
|
|---|
| 106 | static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
|
|---|
| 107 | {
|
|---|
| 108 | int c;
|
|---|
| 109 | char *q;
|
|---|
| 110 |
|
|---|
| 111 | q = buf;
|
|---|
| 112 | while (len > 0) {
|
|---|
| 113 | c = get_le16(pb);
|
|---|
| 114 | if ((q - buf) < buf_size - 1)
|
|---|
| 115 | *q++ = c;
|
|---|
| 116 | len-=2;
|
|---|
| 117 | }
|
|---|
| 118 | *q = '\0';
|
|---|
| 119 | }
|
|---|
| 120 |
|
|---|
| 121 | static int asf_probe(AVProbeData *pd)
|
|---|
| 122 | {
|
|---|
| 123 | GUID g;
|
|---|
| 124 | const unsigned char *p;
|
|---|
| 125 | int i;
|
|---|
| 126 |
|
|---|
| 127 | /* check file header */
|
|---|
| 128 | if (pd->buf_size <= 32)
|
|---|
| 129 | return 0;
|
|---|
| 130 | p = pd->buf;
|
|---|
| 131 | g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
|
|---|
| 132 | p += 4;
|
|---|
| 133 | g.v2 = p[0] | (p[1] << 8);
|
|---|
| 134 | p += 2;
|
|---|
| 135 | g.v3 = p[0] | (p[1] << 8);
|
|---|
| 136 | p += 2;
|
|---|
| 137 | for(i=0;i<8;i++)
|
|---|
| 138 | g.v4[i] = *p++;
|
|---|
| 139 |
|
|---|
| 140 | if (!memcmp(&g, &asf_header, sizeof(GUID)))
|
|---|
| 141 | return AVPROBE_SCORE_MAX;
|
|---|
| 142 | else
|
|---|
| 143 | return 0;
|
|---|
| 144 | }
|
|---|
| 145 |
|
|---|
| 146 | static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|---|
| 147 | {
|
|---|
| 148 | ASFContext *asf = s->priv_data;
|
|---|
| 149 | GUID g;
|
|---|
| 150 | ByteIOContext *pb = &s->pb;
|
|---|
| 151 | AVStream *st;
|
|---|
| 152 | ASFStream *asf_st;
|
|---|
| 153 | int size, i;
|
|---|
| 154 | int64_t gsize;
|
|---|
| 155 |
|
|---|
| 156 | get_guid(pb, &g);
|
|---|
| 157 | if (memcmp(&g, &asf_header, sizeof(GUID)))
|
|---|
| 158 | goto fail;
|
|---|
| 159 | get_le64(pb);
|
|---|
| 160 | get_le32(pb);
|
|---|
| 161 | get_byte(pb);
|
|---|
| 162 | get_byte(pb);
|
|---|
| 163 | memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
|
|---|
| 164 | for(;;) {
|
|---|
| 165 | get_guid(pb, &g);
|
|---|
| 166 | gsize = get_le64(pb);
|
|---|
| 167 | #ifdef DEBUG
|
|---|
| 168 | printf("%08Lx: ", url_ftell(pb) - 24);
|
|---|
| 169 | print_guid(&g);
|
|---|
| 170 | printf(" size=0x%Lx\n", gsize);
|
|---|
| 171 | #endif
|
|---|
| 172 | if (gsize < 24)
|
|---|
| 173 | goto fail;
|
|---|
| 174 | if (!memcmp(&g, &file_header, sizeof(GUID))) {
|
|---|
| 175 | get_guid(pb, &asf->hdr.guid);
|
|---|
| 176 | asf->hdr.file_size = get_le64(pb);
|
|---|
| 177 | asf->hdr.create_time = get_le64(pb);
|
|---|
| 178 | asf->hdr.packets_count = get_le64(pb);
|
|---|
| 179 | asf->hdr.send_time = get_le64(pb);
|
|---|
| 180 | asf->hdr.play_time = get_le64(pb);
|
|---|
| 181 | asf->hdr.preroll = get_le32(pb);
|
|---|
| 182 | asf->hdr.ignore = get_le32(pb);
|
|---|
| 183 | asf->hdr.flags = get_le32(pb);
|
|---|
| 184 | asf->hdr.min_pktsize = get_le32(pb);
|
|---|
| 185 | asf->hdr.max_pktsize = get_le32(pb);
|
|---|
| 186 | asf->hdr.max_bitrate = get_le32(pb);
|
|---|
| 187 | asf->packet_size = asf->hdr.max_pktsize;
|
|---|
| 188 | asf->nb_packets = asf->hdr.packets_count;
|
|---|
| 189 | } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
|
|---|
| 190 | int type, total_size, type_specific_size, sizeX;
|
|---|
| 191 | unsigned int tag1;
|
|---|
| 192 | int64_t pos1, pos2;
|
|---|
| 193 | int test_for_ext_stream_audio;
|
|---|
| 194 |
|
|---|
| 195 | pos1 = url_ftell(pb);
|
|---|
| 196 |
|
|---|
| 197 | st = av_new_stream(s, 0);
|
|---|
| 198 | if (!st)
|
|---|
| 199 | goto fail;
|
|---|
| 200 | av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
|
|---|
| 201 | asf_st = av_mallocz(sizeof(ASFStream));
|
|---|
| 202 | if (!asf_st)
|
|---|
| 203 | goto fail;
|
|---|
| 204 | st->priv_data = asf_st;
|
|---|
| 205 | st->start_time = asf->hdr.preroll;
|
|---|
| 206 | st->duration = asf->hdr.send_time /
|
|---|
| 207 | (10000000 / 1000) - st->start_time;
|
|---|
| 208 | get_guid(pb, &g);
|
|---|
| 209 |
|
|---|
| 210 | test_for_ext_stream_audio = 0;
|
|---|
| 211 | if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
|
|---|
| 212 | type = CODEC_TYPE_AUDIO;
|
|---|
| 213 | } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
|
|---|
| 214 | type = CODEC_TYPE_VIDEO;
|
|---|
| 215 | } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
|
|---|
| 216 | type = CODEC_TYPE_UNKNOWN;
|
|---|
| 217 | } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
|
|---|
| 218 | test_for_ext_stream_audio = 1;
|
|---|
| 219 | type = CODEC_TYPE_UNKNOWN;
|
|---|
| 220 | } else {
|
|---|
| 221 | goto fail;
|
|---|
| 222 | }
|
|---|
| 223 | get_guid(pb, &g);
|
|---|
| 224 | total_size = get_le64(pb);
|
|---|
| 225 | type_specific_size = get_le32(pb);
|
|---|
| 226 | get_le32(pb);
|
|---|
| 227 | st->id = get_le16(pb) & 0x7f; /* stream id */
|
|---|
| 228 | // mapping of asf ID to AV stream ID;
|
|---|
| 229 | asf->asfid2avid[st->id] = s->nb_streams - 1;
|
|---|
| 230 |
|
|---|
| 231 | get_le32(pb);
|
|---|
| 232 |
|
|---|
| 233 | if (test_for_ext_stream_audio) {
|
|---|
| 234 | get_guid(pb, &g);
|
|---|
| 235 | if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
|
|---|
| 236 | type = CODEC_TYPE_AUDIO;
|
|---|
| 237 | get_guid(pb, &g);
|
|---|
| 238 | get_le32(pb);
|
|---|
| 239 | get_le32(pb);
|
|---|
| 240 | get_le32(pb);
|
|---|
| 241 | get_guid(pb, &g);
|
|---|
| 242 | get_le32(pb);
|
|---|
| 243 | }
|
|---|
| 244 | }
|
|---|
| 245 |
|
|---|
| 246 | st->codec->codec_type = type;
|
|---|
| 247 | if (type == CODEC_TYPE_AUDIO) {
|
|---|
| 248 | get_wav_header(pb, st->codec, type_specific_size);
|
|---|
| 249 | st->need_parsing = 1;
|
|---|
| 250 | /* We have to init the frame size at some point .... */
|
|---|
| 251 | pos2 = url_ftell(pb);
|
|---|
| 252 | if (gsize > (pos2 + 8 - pos1 + 24)) {
|
|---|
| 253 | asf_st->ds_span = get_byte(pb);
|
|---|
| 254 | asf_st->ds_packet_size = get_le16(pb);
|
|---|
| 255 | asf_st->ds_chunk_size = get_le16(pb);
|
|---|
| 256 | asf_st->ds_data_size = get_le16(pb);
|
|---|
| 257 | asf_st->ds_silence_data = get_byte(pb);
|
|---|
| 258 | }
|
|---|
| 259 | //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
|
|---|
| 260 | // asf_st->ds_packet_size, asf_st->ds_chunk_size,
|
|---|
| 261 | // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
|
|---|
| 262 | if (asf_st->ds_span > 1) {
|
|---|
| 263 | if (!asf_st->ds_chunk_size
|
|---|
| 264 | || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
|
|---|
| 265 | asf_st->ds_span = 0; // disable descrambling
|
|---|
| 266 | }
|
|---|
| 267 | switch (st->codec->codec_id) {
|
|---|
| 268 | case CODEC_ID_MP3:
|
|---|
| 269 | st->codec->frame_size = MPA_FRAME_SIZE;
|
|---|
| 270 | break;
|
|---|
| 271 | case CODEC_ID_PCM_S16LE:
|
|---|
| 272 | case CODEC_ID_PCM_S16BE:
|
|---|
| 273 | case CODEC_ID_PCM_U16LE:
|
|---|
| 274 | case CODEC_ID_PCM_U16BE:
|
|---|
| 275 | case CODEC_ID_PCM_S8:
|
|---|
| 276 | case CODEC_ID_PCM_U8:
|
|---|
| 277 | case CODEC_ID_PCM_ALAW:
|
|---|
| 278 | case CODEC_ID_PCM_MULAW:
|
|---|
| 279 | st->codec->frame_size = 1;
|
|---|
| 280 | break;
|
|---|
| 281 | default:
|
|---|
| 282 | /* This is probably wrong, but it prevents a crash later */
|
|---|
| 283 | st->codec->frame_size = 1;
|
|---|
| 284 | break;
|
|---|
| 285 | }
|
|---|
| 286 | } else if (type == CODEC_TYPE_VIDEO) {
|
|---|
| 287 | get_le32(pb);
|
|---|
| 288 | get_le32(pb);
|
|---|
| 289 | get_byte(pb);
|
|---|
| 290 | size = get_le16(pb); /* size */
|
|---|
| 291 | sizeX= get_le32(pb); /* size */
|
|---|
| 292 | st->codec->width = get_le32(pb);
|
|---|
| 293 | st->codec->height = get_le32(pb);
|
|---|
| 294 | /* not available for asf */
|
|---|
| 295 | get_le16(pb); /* panes */
|
|---|
| 296 | st->codec->bits_per_sample = get_le16(pb); /* depth */
|
|---|
| 297 | tag1 = get_le32(pb);
|
|---|
| 298 | url_fskip(pb, 20);
|
|---|
| 299 | // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
|
|---|
| 300 | size= sizeX;
|
|---|
| 301 | if (size > 40) {
|
|---|
| 302 | st->codec->extradata_size = size - 40;
|
|---|
| 303 | st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|---|
| 304 | get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
|
|---|
| 305 | }
|
|---|
| 306 |
|
|---|
| 307 | /* Extract palette from extradata if bpp <= 8 */
|
|---|
| 308 | /* This code assumes that extradata contains only palette */
|
|---|
| 309 | /* This is true for all paletted codecs implemented in ffmpeg */
|
|---|
| 310 | if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
|
|---|
| 311 | st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
|
|---|
| 312 | #ifdef WORDS_BIGENDIAN
|
|---|
| 313 | for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
|
|---|
| 314 | st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
|
|---|
| 315 | #else
|
|---|
| 316 | memcpy(st->codec->palctrl->palette, st->codec->extradata,
|
|---|
| 317 | FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
|
|---|
| 318 | #endif
|
|---|
| 319 | st->codec->palctrl->palette_changed = 1;
|
|---|
| 320 | }
|
|---|
| 321 |
|
|---|
| 322 | st->codec->codec_tag = tag1;
|
|---|
| 323 | st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
|
|---|
| 324 | if(tag1 == MKTAG('D', 'V', 'R', ' '))
|
|---|
| 325 | st->need_parsing = 1;
|
|---|
| 326 | }
|
|---|
| 327 | pos2 = url_ftell(pb);
|
|---|
| 328 | url_fskip(pb, gsize - (pos2 - pos1 + 24));
|
|---|
| 329 | } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
|
|---|
| 330 | break;
|
|---|
| 331 | } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
|
|---|
| 332 | int len1, len2, len3, len4, len5;
|
|---|
| 333 |
|
|---|
| 334 | len1 = get_le16(pb);
|
|---|
| 335 | len2 = get_le16(pb);
|
|---|
| 336 | len3 = get_le16(pb);
|
|---|
| 337 | len4 = get_le16(pb);
|
|---|
| 338 | len5 = get_le16(pb);
|
|---|
| 339 | get_str16_nolen(pb, len1, s->title, sizeof(s->title));
|
|---|
| 340 | get_str16_nolen(pb, len2, s->author, sizeof(s->author));
|
|---|
| 341 | get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
|
|---|
| 342 | get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
|
|---|
| 343 | url_fskip(pb, len5);
|
|---|
| 344 | } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
|
|---|
| 345 | int desc_count, i;
|
|---|
| 346 |
|
|---|
| 347 | desc_count = get_le16(pb);
|
|---|
| 348 | for(i=0;i<desc_count;i++)
|
|---|
| 349 | {
|
|---|
| 350 | int name_len,value_type,value_len,value_num = 0;
|
|---|
| 351 | char *name, *value;
|
|---|
| 352 |
|
|---|
| 353 | name_len = get_le16(pb);
|
|---|
| 354 | name = (char *)av_mallocz(name_len);
|
|---|
| 355 | get_str16_nolen(pb, name_len, name, name_len);
|
|---|
| 356 | value_type = get_le16(pb);
|
|---|
| 357 | value_len = get_le16(pb);
|
|---|
| 358 | if ((value_type == 0) || (value_type == 1)) // unicode or byte
|
|---|
| 359 | {
|
|---|
| 360 | value = (char *)av_mallocz(value_len);
|
|---|
| 361 | get_str16_nolen(pb, value_len, value, value_len);
|
|---|
| 362 | if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
|
|---|
| 363 | av_free(value);
|
|---|
| 364 | }
|
|---|
| 365 | if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
|
|---|
| 366 | {
|
|---|
| 367 | if (value_type==2) value_num = get_le32(pb);
|
|---|
| 368 | if (value_type==3) value_num = get_le32(pb);
|
|---|
| 369 | if (value_type==4) value_num = get_le64(pb);
|
|---|
| 370 | if (value_type==5) value_num = get_le16(pb);
|
|---|
| 371 | if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
|
|---|
| 372 | if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
|
|---|
| 373 | }
|
|---|
| 374 | av_free(name);
|
|---|
| 375 | }
|
|---|
| 376 | } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
|
|---|
| 377 | int ext_len, payload_ext_ct, stream_ct;
|
|---|
| 378 | uint32_t ext_d;
|
|---|
| 379 | int64_t pos_ex_st;
|
|---|
| 380 | pos_ex_st = url_ftell(pb);
|
|---|
| 381 |
|
|---|
| 382 | get_le64(pb);
|
|---|
| 383 | get_le64(pb);
|
|---|
| 384 | get_le32(pb);
|
|---|
| 385 | get_le32(pb);
|
|---|
| 386 | get_le32(pb);
|
|---|
| 387 | get_le32(pb);
|
|---|
| 388 | get_le32(pb);
|
|---|
| 389 | get_le32(pb);
|
|---|
| 390 | get_le32(pb);
|
|---|
| 391 | get_le32(pb);
|
|---|
| 392 | get_le16(pb);
|
|---|
| 393 | get_le16(pb);
|
|---|
| 394 | get_le64(pb);
|
|---|
| 395 | stream_ct = get_le16(pb);
|
|---|
| 396 | payload_ext_ct = get_le16(pb);
|
|---|
| 397 |
|
|---|
| 398 | for (i=0; i<stream_ct; i++){
|
|---|
| 399 | get_le16(pb);
|
|---|
| 400 | ext_len = get_le16(pb);
|
|---|
| 401 | url_fseek(pb, ext_len, SEEK_CUR);
|
|---|
| 402 | }
|
|---|
| 403 |
|
|---|
| 404 | for (i=0; i<payload_ext_ct; i++){
|
|---|
| 405 | get_guid(pb, &g);
|
|---|
| 406 | ext_d=get_le16(pb);
|
|---|
| 407 | ext_len=get_le32(pb);
|
|---|
| 408 | url_fseek(pb, ext_len, SEEK_CUR);
|
|---|
| 409 | }
|
|---|
| 410 |
|
|---|
| 411 | // there could be a optional stream properties object to follow
|
|---|
| 412 | // if so the next iteration will pick it up
|
|---|
| 413 | } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
|
|---|
| 414 | int v1, v2;
|
|---|
| 415 | get_guid(pb, &g);
|
|---|
| 416 | v1 = get_le32(pb);
|
|---|
| 417 | v2 = get_le16(pb);
|
|---|
| 418 | #if 0
|
|---|
| 419 | } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
|
|---|
| 420 | int len, v1, n, num;
|
|---|
| 421 | char str[256], *q;
|
|---|
| 422 | char tag[16];
|
|---|
| 423 |
|
|---|
| 424 | get_guid(pb, &g);
|
|---|
| 425 | print_guid(&g);
|
|---|
| 426 |
|
|---|
| 427 | n = get_le32(pb);
|
|---|
| 428 | for(i=0;i<n;i++) {
|
|---|
| 429 | num = get_le16(pb); /* stream number */
|
|---|
| 430 | get_str16(pb, str, sizeof(str));
|
|---|
| 431 | get_str16(pb, str, sizeof(str));
|
|---|
| 432 | len = get_le16(pb);
|
|---|
| 433 | q = tag;
|
|---|
| 434 | while (len > 0) {
|
|---|
| 435 | v1 = get_byte(pb);
|
|---|
| 436 | if ((q - tag) < sizeof(tag) - 1)
|
|---|
| 437 | *q++ = v1;
|
|---|
| 438 | len--;
|
|---|
| 439 | }
|
|---|
| 440 | *q = '\0';
|
|---|
| 441 | }
|
|---|
| 442 | #endif
|
|---|
| 443 | } else if (url_feof(pb)) {
|
|---|
| 444 | goto fail;
|
|---|
| 445 | } else {
|
|---|
| 446 | url_fseek(pb, gsize - 24, SEEK_CUR);
|
|---|
| 447 | }
|
|---|
| 448 | }
|
|---|
| 449 | get_guid(pb, &g);
|
|---|
| 450 | get_le64(pb);
|
|---|
| 451 | get_byte(pb);
|
|---|
| 452 | get_byte(pb);
|
|---|
| 453 | if (url_feof(pb))
|
|---|
| 454 | goto fail;
|
|---|
| 455 | asf->data_offset = url_ftell(pb);
|
|---|
| 456 | asf->packet_size_left = 0;
|
|---|
| 457 |
|
|---|
| 458 | return 0;
|
|---|
| 459 |
|
|---|
| 460 | fail:
|
|---|
| 461 | for(i=0;i<s->nb_streams;i++) {
|
|---|
| 462 | AVStream *st = s->streams[i];
|
|---|
| 463 | if (st) {
|
|---|
| 464 | av_free(st->priv_data);
|
|---|
| 465 | av_free(st->codec->extradata);
|
|---|
| 466 | }
|
|---|
| 467 | av_free(st);
|
|---|
| 468 | }
|
|---|
| 469 | return -1;
|
|---|
| 470 | }
|
|---|
| 471 |
|
|---|
| 472 | #define DO_2BITS(bits, var, defval) \
|
|---|
| 473 | switch (bits & 3) \
|
|---|
| 474 | { \
|
|---|
| 475 | case 3: var = get_le32(pb); rsize += 4; break; \
|
|---|
| 476 | case 2: var = get_le16(pb); rsize += 2; break; \
|
|---|
| 477 | case 1: var = get_byte(pb); rsize++; break; \
|
|---|
| 478 | default: var = defval; break; \
|
|---|
| 479 | }
|
|---|
| 480 |
|
|---|
| 481 | static int asf_get_packet(AVFormatContext *s)
|
|---|
| 482 | {
|
|---|
| 483 | ASFContext *asf = s->priv_data;
|
|---|
| 484 | ByteIOContext *pb = &s->pb;
|
|---|
| 485 | uint32_t packet_length, padsize;
|
|---|
| 486 | int rsize = 9;
|
|---|
| 487 | int c;
|
|---|
| 488 |
|
|---|
| 489 | assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
|
|---|
| 490 |
|
|---|
| 491 | c = get_byte(pb);
|
|---|
| 492 | if (c != 0x82) {
|
|---|
| 493 | if (!url_feof(pb))
|
|---|
| 494 | av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
|
|---|
| 495 | }
|
|---|
| 496 | if ((c & 0x0f) == 2) { // always true for now
|
|---|
| 497 | if (get_le16(pb) != 0) {
|
|---|
| 498 | if (!url_feof(pb))
|
|---|
| 499 | av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
|
|---|
| 500 | return AVERROR_IO;
|
|---|
| 501 | }
|
|---|
| 502 | rsize+=2;
|
|---|
| 503 | /* }else{
|
|---|
| 504 | if (!url_feof(pb))
|
|---|
| 505 | printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
|
|---|
| 506 | return AVERROR_IO;*/
|
|---|
| 507 | }
|
|---|
| 508 |
|
|---|
| 509 | asf->packet_flags = get_byte(pb);
|
|---|
| 510 | asf->packet_property = get_byte(pb);
|
|---|
| 511 |
|
|---|
| 512 | DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
|
|---|
| 513 | DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
|
|---|
| 514 | DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
|
|---|
| 515 |
|
|---|
| 516 | asf->packet_timestamp = get_le32(pb);
|
|---|
| 517 | get_le16(pb); /* duration */
|
|---|
| 518 | // rsize has at least 11 bytes which have to be present
|
|---|
| 519 |
|
|---|
| 520 | if (asf->packet_flags & 0x01) {
|
|---|
| 521 | asf->packet_segsizetype = get_byte(pb); rsize++;
|
|---|
| 522 | asf->packet_segments = asf->packet_segsizetype & 0x3f;
|
|---|
| 523 | } else {
|
|---|
| 524 | asf->packet_segments = 1;
|
|---|
| 525 | asf->packet_segsizetype = 0x80;
|
|---|
| 526 | }
|
|---|
| 527 | asf->packet_size_left = packet_length - padsize - rsize;
|
|---|
| 528 | if (packet_length < asf->hdr.min_pktsize)
|
|---|
| 529 | padsize += asf->hdr.min_pktsize - packet_length;
|
|---|
| 530 | asf->packet_padsize = padsize;
|
|---|
| 531 | #ifdef DEBUG
|
|---|
| 532 | printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
|
|---|
| 533 | #endif
|
|---|
| 534 | return 0;
|
|---|
| 535 | }
|
|---|
| 536 |
|
|---|
| 537 | static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|---|
| 538 | {
|
|---|
| 539 | ASFContext *asf = s->priv_data;
|
|---|
| 540 | ASFStream *asf_st = 0;
|
|---|
| 541 | ByteIOContext *pb = &s->pb;
|
|---|
| 542 | //static int pc = 0;
|
|---|
| 543 | for (;;) {
|
|---|
| 544 | int rsize = 0;
|
|---|
| 545 | if (asf->packet_size_left < FRAME_HEADER_SIZE
|
|---|
| 546 | || asf->packet_segments < 1) {
|
|---|
| 547 | //asf->packet_size_left <= asf->packet_padsize) {
|
|---|
| 548 | int ret = asf->packet_size_left + asf->packet_padsize;
|
|---|
| 549 | //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
|
|---|
| 550 | if((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size)
|
|---|
| 551 | ret += asf->packet_size - ((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size);
|
|---|
| 552 | /* fail safe */
|
|---|
| 553 | url_fskip(pb, ret);
|
|---|
| 554 | asf->packet_pos= url_ftell(&s->pb);
|
|---|
| 555 | ret = asf_get_packet(s);
|
|---|
| 556 | //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
|
|---|
| 557 | if (ret < 0 || url_feof(pb))
|
|---|
| 558 | return AVERROR_IO;
|
|---|
| 559 | asf->packet_time_start = 0;
|
|---|
| 560 | continue;
|
|---|
| 561 | }
|
|---|
| 562 | if (asf->packet_time_start == 0) {
|
|---|
| 563 | /* read frame header */
|
|---|
| 564 | int num = get_byte(pb);
|
|---|
| 565 | asf->packet_segments--;
|
|---|
| 566 | rsize++;
|
|---|
| 567 | asf->packet_key_frame = (num & 0x80) >> 7;
|
|---|
| 568 | asf->stream_index = asf->asfid2avid[num & 0x7f];
|
|---|
| 569 | // sequence should be ignored!
|
|---|
| 570 | DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
|
|---|
| 571 | DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
|
|---|
| 572 | DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
|
|---|
| 573 | //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);
|
|---|
| 574 | if (asf->packet_replic_size > 1) {
|
|---|
| 575 | assert(asf->packet_replic_size >= 8);
|
|---|
| 576 | // it should be always at least 8 bytes - FIXME validate
|
|---|
| 577 | asf->packet_obj_size = get_le32(pb);
|
|---|
| 578 | asf->packet_frag_timestamp = get_le32(pb); // timestamp
|
|---|
| 579 | if (asf->packet_replic_size > 8)
|
|---|
| 580 | url_fskip(pb, asf->packet_replic_size - 8);
|
|---|
| 581 | rsize += asf->packet_replic_size; // FIXME - check validity
|
|---|
| 582 | } else if (asf->packet_replic_size==1){
|
|---|
| 583 | // multipacket - frag_offset is begining timestamp
|
|---|
| 584 | asf->packet_time_start = asf->packet_frag_offset;
|
|---|
| 585 | asf->packet_frag_offset = 0;
|
|---|
| 586 | asf->packet_frag_timestamp = asf->packet_timestamp;
|
|---|
| 587 |
|
|---|
| 588 | asf->packet_time_delta = get_byte(pb);
|
|---|
| 589 | rsize++;
|
|---|
| 590 | }else{
|
|---|
| 591 | assert(asf->packet_replic_size==0);
|
|---|
| 592 | }
|
|---|
| 593 | if (asf->packet_flags & 0x01) {
|
|---|
| 594 | DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
|
|---|
| 595 | #undef DO_2BITS
|
|---|
| 596 | //printf("Fragsize %d\n", asf->packet_frag_size);
|
|---|
| 597 | } else {
|
|---|
| 598 | asf->packet_frag_size = asf->packet_size_left - rsize;
|
|---|
| 599 | //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
|
|---|
| 600 | }
|
|---|
| 601 | if (asf->packet_replic_size == 1) {
|
|---|
| 602 | asf->packet_multi_size = asf->packet_frag_size;
|
|---|
| 603 | if (asf->packet_multi_size > asf->packet_size_left) {
|
|---|
| 604 | asf->packet_segments = 0;
|
|---|
| 605 | continue;
|
|---|
| 606 | }
|
|---|
| 607 | }
|
|---|
| 608 | asf->packet_size_left -= rsize;
|
|---|
| 609 | //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
|
|---|
| 610 |
|
|---|
| 611 | if (asf->stream_index < 0
|
|---|
| 612 | || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
|
|---|
| 613 | || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
|
|---|
| 614 | ) {
|
|---|
| 615 | asf->packet_time_start = 0;
|
|---|
| 616 | /* unhandled packet (should not happen) */
|
|---|
| 617 | url_fskip(pb, asf->packet_frag_size);
|
|---|
| 618 | asf->packet_size_left -= asf->packet_frag_size;
|
|---|
| 619 | if(asf->stream_index < 0)
|
|---|
| 620 | av_log(s, AV_LOG_ERROR, "ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
|
|---|
| 621 | continue;
|
|---|
| 622 | }
|
|---|
| 623 | asf->asf_st = s->streams[asf->stream_index]->priv_data;
|
|---|
| 624 | }
|
|---|
| 625 | asf_st = asf->asf_st;
|
|---|
| 626 |
|
|---|
| 627 | if ((asf->packet_frag_offset != asf_st->frag_offset
|
|---|
| 628 | || (asf->packet_frag_offset
|
|---|
| 629 | && asf->packet_seq != asf_st->seq)) // seq should be ignored
|
|---|
| 630 | ) {
|
|---|
| 631 | /* cannot continue current packet: free it */
|
|---|
| 632 | // FIXME better check if packet was already allocated
|
|---|
| 633 | av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
|
|---|
| 634 | asf_st->pkt.size,
|
|---|
| 635 | asf->packet_obj_size,
|
|---|
| 636 | asf->packet_frag_offset, asf_st->frag_offset,
|
|---|
| 637 | asf->packet_seq, asf_st->seq, asf->packet_frag_size);
|
|---|
| 638 | if (asf_st->pkt.size)
|
|---|
| 639 | av_free_packet(&asf_st->pkt);
|
|---|
| 640 | asf_st->frag_offset = 0;
|
|---|
| 641 | if (asf->packet_frag_offset != 0) {
|
|---|
| 642 | url_fskip(pb, asf->packet_frag_size);
|
|---|
| 643 | av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
|
|---|
| 644 | asf->packet_size_left -= asf->packet_frag_size;
|
|---|
| 645 | continue;
|
|---|
| 646 | }
|
|---|
| 647 | }
|
|---|
| 648 | if (asf->packet_replic_size == 1) {
|
|---|
| 649 | // frag_offset is here used as the begining timestamp
|
|---|
| 650 | asf->packet_frag_timestamp = asf->packet_time_start;
|
|---|
| 651 | asf->packet_time_start += asf->packet_time_delta;
|
|---|
| 652 | asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
|
|---|
| 653 | asf->packet_size_left--;
|
|---|
| 654 | asf->packet_multi_size--;
|
|---|
| 655 | if (asf->packet_multi_size < asf->packet_obj_size)
|
|---|
| 656 | {
|
|---|
| 657 | asf->packet_time_start = 0;
|
|---|
| 658 | url_fskip(pb, asf->packet_multi_size);
|
|---|
| 659 | asf->packet_size_left -= asf->packet_multi_size;
|
|---|
| 660 | continue;
|
|---|
| 661 | }
|
|---|
| 662 | asf->packet_multi_size -= asf->packet_obj_size;
|
|---|
| 663 | //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);
|
|---|
| 664 | }
|
|---|
| 665 | if (asf_st->frag_offset == 0) {
|
|---|
| 666 | /* new packet */
|
|---|
| 667 | av_new_packet(&asf_st->pkt, asf->packet_obj_size);
|
|---|
| 668 | asf_st->seq = asf->packet_seq;
|
|---|
| 669 | asf_st->pkt.pts = asf->packet_frag_timestamp;
|
|---|
| 670 | asf_st->pkt.stream_index = asf->stream_index;
|
|---|
| 671 | asf_st->pkt.pos =
|
|---|
| 672 | asf_st->packet_pos= asf->packet_pos;
|
|---|
| 673 | //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
|
|---|
| 674 | //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
|
|---|
| 675 | //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
|
|---|
| 676 | if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
|
|---|
| 677 | asf->packet_key_frame = 1;
|
|---|
| 678 | if (asf->packet_key_frame)
|
|---|
| 679 | asf_st->pkt.flags |= PKT_FLAG_KEY;
|
|---|
| 680 | }
|
|---|
| 681 |
|
|---|
| 682 | /* read data */
|
|---|
| 683 | //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
|
|---|
| 684 | // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
|
|---|
| 685 | // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
|
|---|
| 686 | asf->packet_size_left -= asf->packet_frag_size;
|
|---|
| 687 | if (asf->packet_size_left < 0)
|
|---|
| 688 | continue;
|
|---|
| 689 | get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
|
|---|
| 690 | asf->packet_frag_size);
|
|---|
| 691 | asf_st->frag_offset += asf->packet_frag_size;
|
|---|
| 692 | /* test if whole packet is read */
|
|---|
| 693 | if (asf_st->frag_offset == asf_st->pkt.size) {
|
|---|
| 694 | /* return packet */
|
|---|
| 695 | if (asf_st->ds_span > 1) {
|
|---|
| 696 | /* packet descrambling */
|
|---|
| 697 | char* newdata = av_malloc(asf_st->pkt.size);
|
|---|
| 698 | if (newdata) {
|
|---|
| 699 | int offset = 0;
|
|---|
| 700 | while (offset < asf_st->pkt.size) {
|
|---|
| 701 | int off = offset / asf_st->ds_chunk_size;
|
|---|
| 702 | int row = off / asf_st->ds_span;
|
|---|
| 703 | int col = off % asf_st->ds_span;
|
|---|
| 704 | int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
|
|---|
| 705 | //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
|
|---|
| 706 | memcpy(newdata + offset,
|
|---|
| 707 | asf_st->pkt.data + idx * asf_st->ds_chunk_size,
|
|---|
| 708 | asf_st->ds_chunk_size);
|
|---|
| 709 | offset += asf_st->ds_chunk_size;
|
|---|
| 710 | }
|
|---|
| 711 | av_free(asf_st->pkt.data);
|
|---|
| 712 | asf_st->pkt.data = newdata;
|
|---|
| 713 | }
|
|---|
| 714 | }
|
|---|
| 715 | asf_st->frag_offset = 0;
|
|---|
| 716 | memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
|
|---|
| 717 | //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
|
|---|
| 718 | asf_st->pkt.size = 0;
|
|---|
| 719 | asf_st->pkt.data = 0;
|
|---|
| 720 | break; // packet completed
|
|---|
| 721 | }
|
|---|
| 722 | }
|
|---|
| 723 | return 0;
|
|---|
| 724 | }
|
|---|
| 725 |
|
|---|
| 726 | static int asf_read_close(AVFormatContext *s)
|
|---|
| 727 | {
|
|---|
| 728 | int i;
|
|---|
| 729 |
|
|---|
| 730 | for(i=0;i<s->nb_streams;i++) {
|
|---|
| 731 | AVStream *st = s->streams[i];
|
|---|
| 732 | av_free(st->priv_data);
|
|---|
| 733 | av_free(st->codec->palctrl);
|
|---|
| 734 | }
|
|---|
| 735 | return 0;
|
|---|
| 736 | }
|
|---|
| 737 |
|
|---|
| 738 | // Added to support seeking after packets have been read
|
|---|
| 739 | // If information is not reset, read_packet fails due to
|
|---|
| 740 | // leftover information from previous reads
|
|---|
| 741 | static void asf_reset_header(AVFormatContext *s)
|
|---|
| 742 | {
|
|---|
| 743 | ASFContext *asf = s->priv_data;
|
|---|
| 744 | ASFStream *asf_st;
|
|---|
| 745 | int i;
|
|---|
| 746 |
|
|---|
| 747 | asf->packet_nb_frames = 0;
|
|---|
| 748 | asf->packet_timestamp_start = -1;
|
|---|
| 749 | asf->packet_timestamp_end = -1;
|
|---|
| 750 | asf->packet_size_left = 0;
|
|---|
| 751 | asf->packet_segments = 0;
|
|---|
| 752 | asf->packet_flags = 0;
|
|---|
| 753 | asf->packet_property = 0;
|
|---|
| 754 | asf->packet_timestamp = 0;
|
|---|
| 755 | asf->packet_segsizetype = 0;
|
|---|
| 756 | asf->packet_segments = 0;
|
|---|
| 757 | asf->packet_seq = 0;
|
|---|
| 758 | asf->packet_replic_size = 0;
|
|---|
| 759 | asf->packet_key_frame = 0;
|
|---|
| 760 | asf->packet_padsize = 0;
|
|---|
| 761 | asf->packet_frag_offset = 0;
|
|---|
| 762 | asf->packet_frag_size = 0;
|
|---|
| 763 | asf->packet_frag_timestamp = 0;
|
|---|
| 764 | asf->packet_multi_size = 0;
|
|---|
| 765 | asf->packet_obj_size = 0;
|
|---|
| 766 | asf->packet_time_delta = 0;
|
|---|
| 767 | asf->packet_time_start = 0;
|
|---|
| 768 |
|
|---|
| 769 | for(i=0; i<s->nb_streams; i++){
|
|---|
| 770 | asf_st= s->streams[i]->priv_data;
|
|---|
| 771 | av_free_packet(&asf_st->pkt);
|
|---|
| 772 | asf_st->frag_offset=0;
|
|---|
| 773 | asf_st->seq=0;
|
|---|
| 774 | }
|
|---|
| 775 | asf->asf_st= NULL;
|
|---|
| 776 | }
|
|---|
| 777 |
|
|---|
| 778 | static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
|
|---|
| 779 | {
|
|---|
| 780 | ASFContext *asf = s->priv_data;
|
|---|
| 781 | AVPacket pkt1, *pkt = &pkt1;
|
|---|
| 782 | ASFStream *asf_st;
|
|---|
| 783 | int64_t pts;
|
|---|
| 784 | int64_t pos= *ppos;
|
|---|
| 785 | int i;
|
|---|
| 786 | int64_t start_pos[s->nb_streams];
|
|---|
| 787 |
|
|---|
| 788 | for(i=0; i<s->nb_streams; i++){
|
|---|
| 789 | start_pos[i]= pos;
|
|---|
| 790 | }
|
|---|
| 791 |
|
|---|
| 792 | pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
|
|---|
| 793 | *ppos= pos;
|
|---|
| 794 | url_fseek(&s->pb, pos, SEEK_SET);
|
|---|
| 795 |
|
|---|
| 796 | //printf("asf_read_pts\n");
|
|---|
| 797 | asf_reset_header(s);
|
|---|
| 798 | for(;;){
|
|---|
| 799 | if (av_read_frame(s, pkt) < 0){
|
|---|
| 800 | av_log(s, AV_LOG_INFO, "seek failed\n");
|
|---|
| 801 | return AV_NOPTS_VALUE;
|
|---|
| 802 | }
|
|---|
| 803 |
|
|---|
| 804 | pts= pkt->pts;
|
|---|
| 805 |
|
|---|
| 806 | av_free_packet(pkt);
|
|---|
| 807 | if(pkt->flags&PKT_FLAG_KEY){
|
|---|
| 808 | i= pkt->stream_index;
|
|---|
| 809 |
|
|---|
| 810 | asf_st= s->streams[i]->priv_data;
|
|---|
| 811 |
|
|---|
| 812 | assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
|
|---|
| 813 | pos= asf_st->packet_pos;
|
|---|
| 814 |
|
|---|
| 815 | av_add_index_entry(s->streams[i], pos, pkt->size, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
|
|---|
| 816 | start_pos[i]= asf_st->packet_pos + 1;
|
|---|
| 817 |
|
|---|
| 818 | if(pkt->stream_index == stream_index)
|
|---|
| 819 | break;
|
|---|
| 820 | }
|
|---|
| 821 | }
|
|---|
| 822 |
|
|---|
| 823 | *ppos= pos;
|
|---|
| 824 | //printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
|
|---|
| 825 |
|
|---|
| 826 | return pts;
|
|---|
| 827 | }
|
|---|
| 828 |
|
|---|
| 829 | static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
|
|---|
| 830 | {
|
|---|
| 831 | ASFContext *asf = s->priv_data;
|
|---|
| 832 |
|
|---|
| 833 | if (asf->packet_size <= 0)
|
|---|
| 834 | return -1;
|
|---|
| 835 |
|
|---|
| 836 | if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
|
|---|
| 837 | return -1;
|
|---|
| 838 |
|
|---|
| 839 | asf_reset_header(s);
|
|---|
| 840 | return 0;
|
|---|
| 841 | }
|
|---|
| 842 |
|
|---|
| 843 | static AVInputFormat asf_demuxer = {
|
|---|
| 844 | "asf",
|
|---|
| 845 | "asf format",
|
|---|
| 846 | sizeof(ASFContext),
|
|---|
| 847 | asf_probe,
|
|---|
| 848 | asf_read_header,
|
|---|
| 849 | asf_read_packet,
|
|---|
| 850 | asf_read_close,
|
|---|
| 851 | asf_read_seek,
|
|---|
| 852 | asf_read_pts,
|
|---|
| 853 | };
|
|---|
| 854 |
|
|---|
| 855 | #ifdef CONFIG_MUXERS
|
|---|
| 856 | extern AVOutputFormat asf_muxer;
|
|---|
| 857 | extern AVOutputFormat asf_stream_muxer;
|
|---|
| 858 | #endif //CONFIG_MUXERS
|
|---|
| 859 |
|
|---|
| 860 | int asf_init(void)
|
|---|
| 861 | {
|
|---|
| 862 | av_register_input_format(&asf_demuxer);
|
|---|
| 863 | #ifdef CONFIG_MUXERS
|
|---|
| 864 | av_register_output_format(&asf_muxer);
|
|---|
| 865 | av_register_output_format(&asf_stream_muxer);
|
|---|
| 866 | #endif //CONFIG_MUXERS
|
|---|
| 867 | return 0;
|
|---|
| 868 | }
|
|---|
