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ffmpeg / libavformat / asf.c @ 756fb7fe

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1 de6d9b64 Fabrice Bellard
/*
2 7fbde343 Aurelien Jacobs
 * ASF compatible demuxer
3 19720f15 Fabrice Bellard
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 19720f15 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 de6d9b64 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 de6d9b64 Fabrice Bellard
 */
21
#include "avformat.h"
22 9d9f4119 Måns Rullgård
#include "riff.h"
23 f80c1ac0 Philip Gladstone
#include "mpegaudio.h"
24 542993b0 Konstantin Andreyev
#include "asf.h"
25 db5c43b4 Zuxy Meng
#include "common.h"
26 de6d9b64 Fabrice Bellard
27 580fb5e7 Michael Niedermayer
#undef NDEBUG
28
#include <assert.h>
29
30 615b92fd Konstantin Andreyev
#define FRAME_HEADER_SIZE 17
31 115329f1 Diego Biurrun
// Fix Me! FRAME_HEADER_SIZE may be different.
32 615b92fd Konstantin Andreyev
33 de6d9b64 Fabrice Bellard
static const GUID index_guid = {
34 24c14d6d Michael Niedermayer
    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
35 de6d9b64 Fabrice Bellard
};
36
37 0e3b6a6f Ryan Martell
static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
38
    0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
39
};
40 de6d9b64 Fabrice Bellard
/**********************************/
41
/* decoding */
42
43
//#define DEBUG
44
45
#ifdef DEBUG
46 5082f759 François Revol
#define PRINT_IF_GUID(g,cmp) \
47
if (!memcmp(g, &cmp, sizeof(GUID))) \
48
    printf("(GUID: %s) ", #cmp)
49
50 de6d9b64 Fabrice Bellard
static void print_guid(const GUID *g)
51
{
52
    int i;
53 5082f759 François Revol
    PRINT_IF_GUID(g, asf_header);
54
    else PRINT_IF_GUID(g, file_header);
55
    else PRINT_IF_GUID(g, stream_header);
56
    else PRINT_IF_GUID(g, audio_stream);
57
    else PRINT_IF_GUID(g, audio_conceal_none);
58
    else PRINT_IF_GUID(g, video_stream);
59
    else PRINT_IF_GUID(g, video_conceal_none);
60 ae38261e Mike Brown
    else PRINT_IF_GUID(g, command_stream);
61 5082f759 François Revol
    else PRINT_IF_GUID(g, comment_header);
62
    else PRINT_IF_GUID(g, codec_comment_header);
63
    else PRINT_IF_GUID(g, codec_comment1_header);
64
    else PRINT_IF_GUID(g, data_header);
65
    else PRINT_IF_GUID(g, index_guid);
66
    else PRINT_IF_GUID(g, head1_guid);
67
    else PRINT_IF_GUID(g, head2_guid);
68
    else PRINT_IF_GUID(g, my_guid);
69 88141c91 Michael Niedermayer
    else PRINT_IF_GUID(g, ext_stream_header);
70
    else PRINT_IF_GUID(g, extended_content_header);
71
    else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
72
    else PRINT_IF_GUID(g, ext_stream_audio_stream);
73 30e88789 Michael Niedermayer
    else PRINT_IF_GUID(g, metadata_header);
74 0e3b6a6f Ryan Martell
    else PRINT_IF_GUID(g, stream_bitrate_guid);
75 5082f759 François Revol
    else
76
        printf("(GUID: unknown) ");
77 24c14d6d Michael Niedermayer
    for(i=0;i<16;i++)
78
        printf(" 0x%02x,", (*g)[i]);
79 de6d9b64 Fabrice Bellard
    printf("}\n");
80
}
81 6df84c3a Alex Beregszaszi
#undef PRINT_IF_GUID
82 de6d9b64 Fabrice Bellard
#endif
83
84
static void get_guid(ByteIOContext *s, GUID *g)
85
{
86 24c14d6d Michael Niedermayer
    assert(sizeof(*g) == 16);
87
    get_buffer(s, g, sizeof(*g));
88 de6d9b64 Fabrice Bellard
}
89
90
#if 0
91
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
92
{
93
    int len, c;
94
    char *q;
95

96
    len = get_le16(pb);
97
    q = buf;
98
    while (len > 0) {
99
        c = get_le16(pb);
100
        if ((q - buf) < buf_size - 1)
101
            *q++ = c;
102
        len--;
103
    }
104
    *q = '\0';
105
}
106
#endif
107
108
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
109
{
110 db5c43b4 Zuxy Meng
    char* q = buf;
111
    len /= 2;
112
    while (len--) {
113
        uint8_t tmp;
114
        PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
115 de6d9b64 Fabrice Bellard
    }
116
    *q = '\0';
117
}
118
119 c9a65ca8 Fabrice Bellard
static int asf_probe(AVProbeData *pd)
120
{
121
    /* check file header */
122 24c14d6d Michael Niedermayer
    if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
123 c9a65ca8 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
124
    else
125
        return 0;
126
}
127
128 30e88789 Michael Niedermayer
static int get_value(ByteIOContext *pb, int type){
129
    switch(type){
130
        case 2: return get_le32(pb);
131
        case 3: return get_le32(pb);
132
        case 4: return get_le64(pb);
133
        case 5: return get_le16(pb);
134
        default:return INT_MIN;
135
    }
136
}
137
138 de6d9b64 Fabrice Bellard
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
139
{
140 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
141 de6d9b64 Fabrice Bellard
    GUID g;
142
    ByteIOContext *pb = &s->pb;
143
    AVStream *st;
144
    ASFStream *asf_st;
145 e095026a Fabrice Bellard
    int size, i;
146 0c1a9eda Zdenek Kabelac
    int64_t gsize;
147 30e88789 Michael Niedermayer
    AVRational dar[128];
148
149
    memset(dar, 0, sizeof(dar));
150 de6d9b64 Fabrice Bellard
151
    get_guid(pb, &g);
152
    if (memcmp(&g, &asf_header, sizeof(GUID)))
153
        goto fail;
154
    get_le64(pb);
155
    get_le32(pb);
156
    get_byte(pb);
157
    get_byte(pb);
158 2141dc37 Zdenek Kabelac
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
159 de6d9b64 Fabrice Bellard
    for(;;) {
160
        get_guid(pb, &g);
161
        gsize = get_le64(pb);
162
#ifdef DEBUG
163 949b1a13 Steve L'Homme
        printf("%08"PRIx64": ", url_ftell(pb) - 24);
164 de6d9b64 Fabrice Bellard
        print_guid(&g);
165 949b1a13 Steve L'Homme
        printf("  size=0x%"PRIx64"\n", gsize);
166 de6d9b64 Fabrice Bellard
#endif
167 09d9672a Michael Niedermayer
        if (!memcmp(&g, &data_header, sizeof(GUID))) {
168
            asf->data_object_offset = url_ftell(pb);
169
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
170
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
171
                asf->data_object_size = gsize - 24;
172
            } else {
173
                asf->data_object_size = (uint64_t)-1;
174
            }
175
            break;
176
        }
177 de6d9b64 Fabrice Bellard
        if (gsize < 24)
178
            goto fail;
179
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
180 2a10020b Zdenek Kabelac
            get_guid(pb, &asf->hdr.guid);
181 bb270c08 Diego Biurrun
            asf->hdr.file_size          = get_le64(pb);
182
            asf->hdr.create_time        = get_le64(pb);
183 6bb2a2df Michael Niedermayer
            asf->nb_packets             = get_le64(pb);
184 bb270c08 Diego Biurrun
            asf->hdr.send_time          = get_le64(pb);
185
            asf->hdr.play_time          = get_le64(pb);
186
            asf->hdr.preroll            = get_le32(pb);
187
            asf->hdr.ignore             = get_le32(pb);
188
            asf->hdr.flags              = get_le32(pb);
189
            asf->hdr.min_pktsize        = get_le32(pb);
190
            asf->hdr.max_pktsize        = get_le32(pb);
191
            asf->hdr.max_bitrate        = get_le32(pb);
192
            asf->packet_size = asf->hdr.max_pktsize;
193 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
194 7ad5455c Michael Niedermayer
            int type, type_specific_size, sizeX;
195
            uint64_t total_size;
196 de6d9b64 Fabrice Bellard
            unsigned int tag1;
197 0c1a9eda Zdenek Kabelac
            int64_t pos1, pos2;
198 6fea687e John Donaghy
            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
199 2a10020b Zdenek Kabelac
200 de6d9b64 Fabrice Bellard
            pos1 = url_ftell(pb);
201
202 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
203 de6d9b64 Fabrice Bellard
            if (!st)
204
                goto fail;
205 9ee91c2f Michael Niedermayer
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
206 de6d9b64 Fabrice Bellard
            asf_st = av_mallocz(sizeof(ASFStream));
207
            if (!asf_st)
208
                goto fail;
209
            st->priv_data = asf_st;
210 c0df9d75 Michael Niedermayer
            st->start_time = asf->hdr.preroll;
211 73fe1052 Ryan Martell
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
212
                st->duration = asf->hdr.send_time /
213
                    (10000000 / 1000) - st->start_time;
214
            }
215 de6d9b64 Fabrice Bellard
            get_guid(pb, &g);
216 88141c91 Michael Niedermayer
217
            test_for_ext_stream_audio = 0;
218 de6d9b64 Fabrice Bellard
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
219
                type = CODEC_TYPE_AUDIO;
220
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
221
                type = CODEC_TYPE_VIDEO;
222 ae38261e Mike Brown
            } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
223
                type = CODEC_TYPE_UNKNOWN;
224 88141c91 Michael Niedermayer
            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
225
                test_for_ext_stream_audio = 1;
226
                type = CODEC_TYPE_UNKNOWN;
227 de6d9b64 Fabrice Bellard
            } else {
228
                goto fail;
229
            }
230
            get_guid(pb, &g);
231
            total_size = get_le64(pb);
232 2e7973bb Roman Shaposhnik
            type_specific_size = get_le32(pb);
233 de6d9b64 Fabrice Bellard
            get_le32(pb);
234 bb270c08 Diego Biurrun
            st->id = get_le16(pb) & 0x7f; /* stream id */
235 2a10020b Zdenek Kabelac
            // mapping of asf ID to AV stream ID;
236 247eadca Fabrice Bellard
            asf->asfid2avid[st->id] = s->nb_streams - 1;
237 2a10020b Zdenek Kabelac
238 de6d9b64 Fabrice Bellard
            get_le32(pb);
239 88141c91 Michael Niedermayer
240
            if (test_for_ext_stream_audio) {
241
                get_guid(pb, &g);
242
                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
243
                    type = CODEC_TYPE_AUDIO;
244 6fea687e John Donaghy
                    is_dvr_ms_audio=1;
245 88141c91 Michael Niedermayer
                    get_guid(pb, &g);
246
                    get_le32(pb);
247
                    get_le32(pb);
248
                    get_le32(pb);
249
                    get_guid(pb, &g);
250
                    get_le32(pb);
251
                }
252
            }
253
254 bb270c08 Diego Biurrun
            st->codec->codec_type = type;
255 de6d9b64 Fabrice Bellard
            if (type == CODEC_TYPE_AUDIO) {
256 01f4895c Michael Niedermayer
                get_wav_header(pb, st->codec, type_specific_size);
257 6fea687e John Donaghy
                if (is_dvr_ms_audio) {
258
                    // codec_id and codec_tag are unreliable in dvr_ms
259
                    // files. Set them later by probing stream.
260
                    st->codec->codec_id = CODEC_ID_NONE;
261
                    st->codec->codec_tag = 0;
262
                }
263 57004ff1 Aurelien Jacobs
                st->need_parsing = AVSTREAM_PARSE_FULL;
264 bb270c08 Diego Biurrun
                /* We have to init the frame size at some point .... */
265
                pos2 = url_ftell(pb);
266 b9c6d01b Michael Niedermayer
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
267 bb270c08 Diego Biurrun
                    asf_st->ds_span = get_byte(pb);
268
                    asf_st->ds_packet_size = get_le16(pb);
269
                    asf_st->ds_chunk_size = get_le16(pb);
270 6bb2a2df Michael Niedermayer
                    get_le16(pb); //ds_data_size
271
                    get_byte(pb); //ds_silence_data
272 bb270c08 Diego Biurrun
                }
273
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
274
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
275
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
276
                if (asf_st->ds_span > 1) {
277
                    if (!asf_st->ds_chunk_size
278 05219463 Michael Niedermayer
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
279
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
280 bb270c08 Diego Biurrun
                        asf_st->ds_span = 0; // disable descrambling
281
                }
282 01f4895c Michael Niedermayer
                switch (st->codec->codec_id) {
283 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
284 01f4895c Michael Niedermayer
                    st->codec->frame_size = MPA_FRAME_SIZE;
285 f80c1ac0 Philip Gladstone
                    break;
286
                case CODEC_ID_PCM_S16LE:
287
                case CODEC_ID_PCM_S16BE:
288
                case CODEC_ID_PCM_U16LE:
289
                case CODEC_ID_PCM_U16BE:
290
                case CODEC_ID_PCM_S8:
291
                case CODEC_ID_PCM_U8:
292
                case CODEC_ID_PCM_ALAW:
293
                case CODEC_ID_PCM_MULAW:
294 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
295 f80c1ac0 Philip Gladstone
                    break;
296
                default:
297
                    /* This is probably wrong, but it prevents a crash later */
298 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
299 f80c1ac0 Philip Gladstone
                    break;
300
                }
301 88141c91 Michael Niedermayer
            } else if (type == CODEC_TYPE_VIDEO) {
302 bb270c08 Diego Biurrun
                get_le32(pb);
303 de6d9b64 Fabrice Bellard
                get_le32(pb);
304
                get_byte(pb);
305
                size = get_le16(pb); /* size */
306 0ffd77b9 Michael Niedermayer
                sizeX= get_le32(pb); /* size */
307 01f4895c Michael Niedermayer
                st->codec->width = get_le32(pb);
308 bb270c08 Diego Biurrun
                st->codec->height = get_le32(pb);
309 2a10020b Zdenek Kabelac
                /* not available for asf */
310 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
311 bb270c08 Diego Biurrun
                st->codec->bits_per_sample = get_le16(pb); /* depth */
312 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
313 bb270c08 Diego Biurrun
                url_fskip(pb, 20);
314 0ffd77b9 Michael Niedermayer
//                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
315
                size= sizeX;
316 bb270c08 Diego Biurrun
                if (size > 40) {
317
                    st->codec->extradata_size = size - 40;
318
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
319
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
320
                }
321 5e29abf8 Roberto Togni
322
        /* Extract palette from extradata if bpp <= 8 */
323
        /* This code assumes that extradata contains only palette */
324
        /* This is true for all paletted codecs implemented in ffmpeg */
325 01f4895c Michael Niedermayer
        if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
326
            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
327 5e29abf8 Roberto Togni
#ifdef WORDS_BIGENDIAN
328 01f4895c Michael Niedermayer
            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
329
                st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
330 5e29abf8 Roberto Togni
#else
331 01f4895c Michael Niedermayer
            memcpy(st->codec->palctrl->palette, st->codec->extradata,
332
                   FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
333 5e29abf8 Roberto Togni
#endif
334 01f4895c Michael Niedermayer
            st->codec->palctrl->palette_changed = 1;
335 5e29abf8 Roberto Togni
        }
336
337 01f4895c Michael Niedermayer
                st->codec->codec_tag = tag1;
338 bb270c08 Diego Biurrun
                st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
339 afbb5ce4 Michael Niedermayer
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
340 57004ff1 Aurelien Jacobs
                    st->need_parsing = AVSTREAM_PARSE_FULL;
341 de6d9b64 Fabrice Bellard
            }
342
            pos2 = url_ftell(pb);
343
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
344
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
345
            int len1, len2, len3, len4, len5;
346
347
            len1 = get_le16(pb);
348
            len2 = get_le16(pb);
349
            len3 = get_le16(pb);
350
            len4 = get_le16(pb);
351
            len5 = get_le16(pb);
352 4e15cc8b Michael Niedermayer
            get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
353
            get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
354 de6d9b64 Fabrice Bellard
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
355 4e15cc8b Michael Niedermayer
            get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
356 bb270c08 Diego Biurrun
            url_fskip(pb, len5);
357 0e3b6a6f Ryan Martell
        } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
358
            int stream_count = get_le16(pb);
359
            int j;
360
361
//            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
362
//            av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
363
            for(j = 0; j < stream_count; j++) {
364
                int flags, bitrate, stream_id;
365
366
                flags= get_le16(pb);
367
                bitrate= get_le32(pb);
368
                stream_id= (flags & 0x7f);
369
//                av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
370
                asf->stream_bitrates[stream_id-1]= bitrate;
371
            }
372 d13431cd Kevin Kuphal
       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
373
                int desc_count, i;
374
375
                desc_count = get_le16(pb);
376
                for(i=0;i<desc_count;i++)
377
                {
378 052aa2ad Steve L'Homme
                        int name_len,value_type,value_len;
379
                        uint64_t value_num = 0;
380 d045b8c1 Michael Niedermayer
                        char name[1024];
381 d13431cd Kevin Kuphal
382
                        name_len = get_le16(pb);
383 d045b8c1 Michael Niedermayer
                        get_str16_nolen(pb, name_len, name, sizeof(name));
384 d13431cd Kevin Kuphal
                        value_type = get_le16(pb);
385
                        value_len = get_le16(pb);
386
                        if ((value_type == 0) || (value_type == 1)) // unicode or byte
387
                        {
388 5e2a4855 Michael Niedermayer
                                if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
389
                                else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
390
                                else url_fskip(pb, value_len);
391 d13431cd Kevin Kuphal
                        }
392 724dc20c Michael Niedermayer
                        if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
393 d13431cd Kevin Kuphal
                        {
394 30e88789 Michael Niedermayer
                                value_num= get_value(pb, value_type);
395 4e15cc8b Michael Niedermayer
                                if (!strcmp(name,"WM/Track"      )) s->track = value_num + 1;
396
                                if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
397 d13431cd Kevin Kuphal
                        }
398
                }
399 30e88789 Michael Niedermayer
        } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
400
            int n, stream_num, name_len, value_len, value_type, value_num;
401
            n = get_le16(pb);
402
403
            for(i=0;i<n;i++) {
404
                char name[1024];
405
406
                get_le16(pb); //lang_list_index
407
                stream_num= get_le16(pb);
408
                name_len=   get_le16(pb);
409
                value_type= get_le16(pb);
410
                value_len=  get_le32(pb);
411
412
                get_str16_nolen(pb, name_len, name, sizeof(name));
413
//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
414
                value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
415
                url_fskip(pb, value_len - 2);
416
417
                if(stream_num<128){
418
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
419
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
420
                }
421
            }
422 88141c91 Michael Niedermayer
        } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
423
            int ext_len, payload_ext_ct, stream_ct;
424 0b339acb Baptiste Coudurier
            uint32_t ext_d;
425 1bd86246 Måns Rullgård
            int64_t pos_ex_st;
426 88141c91 Michael Niedermayer
            pos_ex_st = url_ftell(pb);
427
428 de3ae959 Michael Niedermayer
            get_le64(pb); // starttime
429
            get_le64(pb); // endtime
430 0b339acb Baptiste Coudurier
            get_le32(pb); // leak-datarate
431 de3ae959 Michael Niedermayer
            get_le32(pb); // bucket-datasize
432
            get_le32(pb); // init-bucket-fullness
433
            get_le32(pb); // alt-leak-datarate
434
            get_le32(pb); // alt-bucket-datasize
435
            get_le32(pb); // alt-init-bucket-fullness
436
            get_le32(pb); // max-object-size
437
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
438 0b339acb Baptiste Coudurier
            get_le16(pb); // stream-num
439 de3ae959 Michael Niedermayer
            get_le16(pb); // stream-language-id-index
440
            get_le64(pb); // avg frametime in 100ns units
441
            stream_ct = get_le16(pb); //stream-name-count
442
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
443 88141c91 Michael Niedermayer
444
            for (i=0; i<stream_ct; i++){
445
                get_le16(pb);
446
                ext_len = get_le16(pb);
447
                url_fseek(pb, ext_len, SEEK_CUR);
448
            }
449
450
            for (i=0; i<payload_ext_ct; i++){
451
                get_guid(pb, &g);
452
                ext_d=get_le16(pb);
453
                ext_len=get_le32(pb);
454
                url_fseek(pb, ext_len, SEEK_CUR);
455
            }
456
457
            // there could be a optional stream properties object to follow
458
            // if so the next iteration will pick it up
459 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
460
            int v1, v2;
461
            get_guid(pb, &g);
462
            v1 = get_le32(pb);
463
            v2 = get_le16(pb);
464 88141c91 Michael Niedermayer
#if 0
465 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
466
            int len, v1, n, num;
467
            char str[256], *q;
468
            char tag[16];
469

470
            get_guid(pb, &g);
471
            print_guid(&g);
472 2a10020b Zdenek Kabelac

473 de6d9b64 Fabrice Bellard
            n = get_le32(pb);
474
            for(i=0;i<n;i++) {
475
                num = get_le16(pb); /* stream number */
476
                get_str16(pb, str, sizeof(str));
477
                get_str16(pb, str, sizeof(str));
478
                len = get_le16(pb);
479
                q = tag;
480
                while (len > 0) {
481
                    v1 = get_byte(pb);
482
                    if ((q - tag) < sizeof(tag) - 1)
483
                        *q++ = v1;
484
                    len--;
485
                }
486
                *q = '\0';
487
            }
488
#endif
489
        } else if (url_feof(pb)) {
490
            goto fail;
491
        } else {
492
            url_fseek(pb, gsize - 24, SEEK_CUR);
493
        }
494
    }
495
    get_guid(pb, &g);
496
    get_le64(pb);
497
    get_byte(pb);
498
    get_byte(pb);
499 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
500
        goto fail;
501
    asf->data_offset = url_ftell(pb);
502 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
503
504 30e88789 Michael Niedermayer
505
    for(i=0; i<128; i++){
506
        int stream_num= asf->asfid2avid[i];
507 0b339acb Baptiste Coudurier
        if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
508 30e88789 Michael Niedermayer
            AVCodecContext *codec= s->streams[stream_num]->codec;
509 0b339acb Baptiste Coudurier
            av_reduce(&codec->sample_aspect_ratio.num,
510
                    &codec->sample_aspect_ratio.den,
511
                    dar[i].num, dar[i].den, INT_MAX);
512 30e88789 Michael Niedermayer
//av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
513
        }
514
    }
515
516 de6d9b64 Fabrice Bellard
    return 0;
517
518
 fail:
519 4c3dff6d Zdenek Kabelac
     for(i=0;i<s->nb_streams;i++) {
520 de6d9b64 Fabrice Bellard
        AVStream *st = s->streams[i];
521 bb270c08 Diego Biurrun
        if (st) {
522
            av_free(st->priv_data);
523 01f4895c Michael Niedermayer
            av_free(st->codec->extradata);
524 bb270c08 Diego Biurrun
        }
525 1ea4f593 Fabrice Bellard
        av_free(st);
526 de6d9b64 Fabrice Bellard
    }
527
    return -1;
528
}
529
530 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
531
    switch (bits & 3) \
532
    { \
533
    case 3: var = get_le32(pb); rsize += 4; break; \
534
    case 2: var = get_le16(pb); rsize += 2; break; \
535
    case 1: var = get_byte(pb); rsize++; break; \
536
    default: var = defval; break; \
537
    }
538
539 f7835507 Michael Niedermayer
/**
540
 *
541
 * @return <0 in case of an error
542
 */
543 de6d9b64 Fabrice Bellard
static int asf_get_packet(AVFormatContext *s)
544
{
545
    ASFContext *asf = s->priv_data;
546
    ByteIOContext *pb = &s->pb;
547 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
548 0c0d17f3 Michael Niedermayer
    int rsize = 8;
549 0fd9e6f3 Michael Niedermayer
    int c, d, e, off;
550
551
    off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
552
553
    c=d=e=-1;
554
    while(off-- > 0){
555
        c=d; d=e;
556
        e= get_byte(pb);
557
        if(c == 0x82 && !d && !e)
558
            break;
559
    }
560 115329f1 Diego Biurrun
561 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
562 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
563 bb270c08 Diego Biurrun
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
564 2a10020b Zdenek Kabelac
    }
565 0c0d17f3 Michael Niedermayer
    if ((c & 0x8f) == 0x82) {
566 0fd9e6f3 Michael Niedermayer
        if (d || e) {
567 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
568 bb270c08 Diego Biurrun
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
569 f7835507 Michael Niedermayer
            return -1;
570 bb270c08 Diego Biurrun
        }
571 0c0d17f3 Michael Niedermayer
        c= get_byte(pb);
572 0fd9e6f3 Michael Niedermayer
        d= get_byte(pb);
573 0c0d17f3 Michael Niedermayer
        rsize+=3;
574
    }else{
575
        url_fseek(pb, -1, SEEK_CUR); //FIXME
576 de6d9b64 Fabrice Bellard
    }
577 2a10020b Zdenek Kabelac
578 0c0d17f3 Michael Niedermayer
    asf->packet_flags    = c;
579
    asf->packet_property = d;
580 2a10020b Zdenek Kabelac
581
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
582
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
583
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
584
585 5b11e081 Michael Niedermayer
    //the following checks prevent overflows and infinite loops
586
    if(packet_length >= (1U<<29)){
587
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
588 ceba96cb Michael Niedermayer
        return -1;
589 5b11e081 Michael Niedermayer
    }
590 92216453 Michael Niedermayer
    if(padsize >= packet_length){
591 5b11e081 Michael Niedermayer
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
592 ceba96cb Michael Niedermayer
        return -1;
593 5b11e081 Michael Niedermayer
    }
594
595 2a10020b Zdenek Kabelac
    asf->packet_timestamp = get_le32(pb);
596 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
597 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
598 2a10020b Zdenek Kabelac
599
    if (asf->packet_flags & 0x01) {
600 bb270c08 Diego Biurrun
        asf->packet_segsizetype = get_byte(pb); rsize++;
601 2a10020b Zdenek Kabelac
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
602
    } else {
603 bb270c08 Diego Biurrun
        asf->packet_segments = 1;
604 2a10020b Zdenek Kabelac
        asf->packet_segsizetype = 0x80;
605
    }
606
    asf->packet_size_left = packet_length - padsize - rsize;
607 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
608
        padsize += asf->hdr.min_pktsize - packet_length;
609 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
610 de6d9b64 Fabrice Bellard
#ifdef DEBUG
611 2a10020b Zdenek Kabelac
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
612 de6d9b64 Fabrice Bellard
#endif
613
    return 0;
614
}
615
616 ae60a857 Michael Niedermayer
/**
617
 *
618
 * @return <0 if error
619
 */
620
static int asf_read_frame_header(AVFormatContext *s){
621
    ASFContext *asf = s->priv_data;
622
    ByteIOContext *pb = &s->pb;
623
    int rsize = 1;
624
    int num = get_byte(pb);
625 559a55ad Michael Niedermayer
    int64_t ts0, ts1;
626 ae60a857 Michael Niedermayer
627
    asf->packet_segments--;
628
    asf->packet_key_frame = num >> 7;
629
    asf->stream_index = asf->asfid2avid[num & 0x7f];
630
    // sequence should be ignored!
631
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
632
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
633
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
634
//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);
635
    if (asf->packet_replic_size >= 8) {
636
        asf->packet_obj_size = get_le32(pb);
637
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
638
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
639
            return -1;
640
        }
641
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
642 559a55ad Michael Niedermayer
        if(asf->packet_replic_size >= 8+38+4){
643
//            for(i=0; i<asf->packet_replic_size-8; i++)
644
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
645
//            av_log(s, AV_LOG_DEBUG, "\n");
646
            url_fskip(pb, 10);
647
            ts0= get_le64(pb);
648
            ts1= get_le64(pb);
649
            url_fskip(pb, 12);
650
            get_le32(pb);
651
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
652
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
653
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
654
        }else
655
            url_fskip(pb, asf->packet_replic_size - 8);
656 ae60a857 Michael Niedermayer
        rsize += asf->packet_replic_size; // FIXME - check validity
657
    } else if (asf->packet_replic_size==1){
658
        // multipacket - frag_offset is begining timestamp
659
        asf->packet_time_start = asf->packet_frag_offset;
660
        asf->packet_frag_offset = 0;
661
        asf->packet_frag_timestamp = asf->packet_timestamp;
662
663
        asf->packet_time_delta = get_byte(pb);
664
        rsize++;
665
    }else if(asf->packet_replic_size!=0){
666
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
667
        return -1;
668
    }
669
    if (asf->packet_flags & 0x01) {
670
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
671 13f7e4b9 Michael Niedermayer
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
672
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
673
            return -1;
674
        }
675 ae60a857 Michael Niedermayer
        //printf("Fragsize %d\n", asf->packet_frag_size);
676
    } else {
677
        asf->packet_frag_size = asf->packet_size_left - rsize;
678
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
679
    }
680
    if (asf->packet_replic_size == 1) {
681
        asf->packet_multi_size = asf->packet_frag_size;
682
        if (asf->packet_multi_size > asf->packet_size_left)
683
            return -1;
684
    }
685
    asf->packet_size_left -= rsize;
686
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
687
688
    return 0;
689
}
690
691 de6d9b64 Fabrice Bellard
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
692
{
693
    ASFContext *asf = s->priv_data;
694 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
695 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
696 1359c2d4 Zdenek Kabelac
    //static int pc = 0;
697 2a10020b Zdenek Kabelac
    for (;;) {
698 ceba96cb Michael Niedermayer
        if(url_feof(pb))
699
            return AVERROR_IO;
700 bb270c08 Diego Biurrun
        if (asf->packet_size_left < FRAME_HEADER_SIZE
701
            || asf->packet_segments < 1) {
702
            //asf->packet_size_left <= asf->packet_padsize) {
703
            int ret = asf->packet_size_left + asf->packet_padsize;
704 949b1a13 Steve L'Homme
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
705 5b11e081 Michael Niedermayer
            assert(ret>=0);
706 bb270c08 Diego Biurrun
            /* fail safe */
707
            url_fskip(pb, ret);
708 b04d5d31 Michael Niedermayer
709 82b9e4a2 Michael Niedermayer
            asf->packet_pos= url_ftell(&s->pb);
710 b6eaae39 Kohn Emil Dan
            if (asf->data_object_size != (uint64_t)-1 &&
711
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
712
                return AVERROR_IO; /* Do not exceed the size of the data object */
713 bb270c08 Diego Biurrun
            ret = asf_get_packet(s);
714
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
715 ceba96cb Michael Niedermayer
            if (ret < 0)
716
                assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
717 2141dc37 Zdenek Kabelac
            asf->packet_time_start = 0;
718 2a10020b Zdenek Kabelac
            continue;
719 bb270c08 Diego Biurrun
        }
720
        if (asf->packet_time_start == 0) {
721 ae60a857 Michael Niedermayer
            if(asf_read_frame_header(s) < 0){
722
                asf->packet_segments= 0;
723 236116cb Michael Niedermayer
                continue;
724 1305a9d5 Michael Niedermayer
            }
725 bb270c08 Diego Biurrun
            if (asf->stream_index < 0
726 f3356e9c Michael Niedermayer
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
727
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
728
                ) {
729 1359c2d4 Zdenek Kabelac
                asf->packet_time_start = 0;
730 bb270c08 Diego Biurrun
                /* unhandled packet (should not happen) */
731
                url_fskip(pb, asf->packet_frag_size);
732
                asf->packet_size_left -= asf->packet_frag_size;
733 b9866ebc Michael Niedermayer
                if(asf->stream_index < 0)
734 ae60a857 Michael Niedermayer
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
735 1359c2d4 Zdenek Kabelac
                continue;
736 bb270c08 Diego Biurrun
            }
737
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
738
        }
739
        asf_st = asf->asf_st;
740
741
        if (asf->packet_replic_size == 1) {
742
            // frag_offset is here used as the begining timestamp
743
            asf->packet_frag_timestamp = asf->packet_time_start;
744
            asf->packet_time_start += asf->packet_time_delta;
745
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
746
            asf->packet_size_left--;
747 2141dc37 Zdenek Kabelac
            asf->packet_multi_size--;
748 bb270c08 Diego Biurrun
            if (asf->packet_multi_size < asf->packet_obj_size)
749
            {
750
                asf->packet_time_start = 0;
751
                url_fskip(pb, asf->packet_multi_size);
752
                asf->packet_size_left -= asf->packet_multi_size;
753 2141dc37 Zdenek Kabelac
                continue;
754 bb270c08 Diego Biurrun
            }
755
            asf->packet_multi_size -= asf->packet_obj_size;
756
            //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);
757
        }
758 f8f0a0bd Michael Niedermayer
        if (   asf_st->pkt.size != asf->packet_obj_size
759
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
760 200026aa Michael Niedermayer
            if(asf_st->pkt.data){
761
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
762
                asf_st->frag_offset = 0;
763
                av_free_packet(&asf_st->pkt);
764
            }
765 bb270c08 Diego Biurrun
            /* new packet */
766
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
767
            asf_st->seq = asf->packet_seq;
768
            asf_st->pkt.pts = asf->packet_frag_timestamp;
769
            asf_st->pkt.stream_index = asf->stream_index;
770 115329f1 Diego Biurrun
            asf_st->pkt.pos =
771
            asf_st->packet_pos= asf->packet_pos;
772
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
773 82b9e4a2 Michael Niedermayer
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
774 01f4895c Michael Niedermayer
//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
775 bb270c08 Diego Biurrun
            if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
776
                asf->packet_key_frame = 1;
777
            if (asf->packet_key_frame)
778
                asf_st->pkt.flags |= PKT_FLAG_KEY;
779
        }
780
781
        /* read data */
782
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
783
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
784
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
785
        asf->packet_size_left -= asf->packet_frag_size;
786
        if (asf->packet_size_left < 0)
787 2141dc37 Zdenek Kabelac
            continue;
788 4c71d727 Michael Niedermayer
789
        if(   asf->packet_frag_offset >= asf_st->pkt.size
790
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
791
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
792
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
793
            continue;
794
        }
795
796 bb270c08 Diego Biurrun
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
797
                   asf->packet_frag_size);
798
        asf_st->frag_offset += asf->packet_frag_size;
799
        /* test if whole packet is read */
800
        if (asf_st->frag_offset == asf_st->pkt.size) {
801
            /* return packet */
802
            if (asf_st->ds_span > 1) {
803 05219463 Michael Niedermayer
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
804
                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
805
              }else{
806 bb270c08 Diego Biurrun
                /* packet descrambling */
807 191e8ca7 Måns Rullgård
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
808 bb270c08 Diego Biurrun
                if (newdata) {
809
                    int offset = 0;
810
                    while (offset < asf_st->pkt.size) {
811
                        int off = offset / asf_st->ds_chunk_size;
812
                        int row = off / asf_st->ds_span;
813
                        int col = off % asf_st->ds_span;
814
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
815
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
816 05219463 Michael Niedermayer
817
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
818
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
819 bb270c08 Diego Biurrun
                        memcpy(newdata + offset,
820
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
821
                               asf_st->ds_chunk_size);
822
                        offset += asf_st->ds_chunk_size;
823
                    }
824
                    av_free(asf_st->pkt.data);
825
                    asf_st->pkt.data = newdata;
826
                }
827 05219463 Michael Niedermayer
              }
828 bb270c08 Diego Biurrun
            }
829
            asf_st->frag_offset = 0;
830 b83e83b9 Michael Niedermayer
            *pkt= asf_st->pkt;
831 bb270c08 Diego Biurrun
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
832
            asf_st->pkt.size = 0;
833
            asf_st->pkt.data = 0;
834
            break; // packet completed
835
        }
836 de6d9b64 Fabrice Bellard
    }
837
    return 0;
838
}
839
840
static int asf_read_close(AVFormatContext *s)
841
{
842
    int i;
843
844
    for(i=0;i<s->nb_streams;i++) {
845 bb270c08 Diego Biurrun
        AVStream *st = s->streams[i];
846
        av_free(st->priv_data);
847 1ae7518d Michael Niedermayer
        av_free(st->codec->palctrl);
848 de6d9b64 Fabrice Bellard
    }
849
    return 0;
850
}
851
852 38376f00 Kevin Kuphal
// Added to support seeking after packets have been read
853
// If information is not reset, read_packet fails due to
854
// leftover information from previous reads
855
static void asf_reset_header(AVFormatContext *s)
856
{
857
    ASFContext *asf = s->priv_data;
858 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
859
    int i;
860 38376f00 Kevin Kuphal
861
    asf->packet_nb_frames = 0;
862
    asf->packet_size_left = 0;
863
    asf->packet_segments = 0;
864
    asf->packet_flags = 0;
865
    asf->packet_property = 0;
866
    asf->packet_timestamp = 0;
867
    asf->packet_segsizetype = 0;
868
    asf->packet_segments = 0;
869
    asf->packet_seq = 0;
870
    asf->packet_replic_size = 0;
871
    asf->packet_key_frame = 0;
872
    asf->packet_padsize = 0;
873
    asf->packet_frag_offset = 0;
874
    asf->packet_frag_size = 0;
875
    asf->packet_frag_timestamp = 0;
876
    asf->packet_multi_size = 0;
877
    asf->packet_obj_size = 0;
878
    asf->packet_time_delta = 0;
879
    asf->packet_time_start = 0;
880 115329f1 Diego Biurrun
881 82b9e4a2 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
882
        asf_st= s->streams[i]->priv_data;
883
        av_free_packet(&asf_st->pkt);
884
        asf_st->frag_offset=0;
885
        asf_st->seq=0;
886
    }
887
    asf->asf_st= NULL;
888 38376f00 Kevin Kuphal
}
889
890 8d14a25c Michael Niedermayer
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
891 38376f00 Kevin Kuphal
{
892
    ASFContext *asf = s->priv_data;
893
    AVPacket pkt1, *pkt = &pkt1;
894 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
895 580fb5e7 Michael Niedermayer
    int64_t pts;
896 82b9e4a2 Michael Niedermayer
    int64_t pos= *ppos;
897 3e9245a9 Michael Niedermayer
    int i;
898
    int64_t start_pos[s->nb_streams];
899 115329f1 Diego Biurrun
900 3e9245a9 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
901
        start_pos[i]= pos;
902
    }
903 115329f1 Diego Biurrun
904 8d14a25c Michael Niedermayer
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
905
    *ppos= pos;
906
    url_fseek(&s->pb, pos, SEEK_SET);
907 115329f1 Diego Biurrun
908 82b9e4a2 Michael Niedermayer
//printf("asf_read_pts\n");
909
    asf_reset_header(s);
910 3e9245a9 Michael Niedermayer
    for(;;){
911 82b9e4a2 Michael Niedermayer
        if (av_read_frame(s, pkt) < 0){
912 0b93103a Michael Niedermayer
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
913 bb270c08 Diego Biurrun
            return AV_NOPTS_VALUE;
914 82b9e4a2 Michael Niedermayer
        }
915 115329f1 Diego Biurrun
916 38cf2a72 Michael Niedermayer
        pts= pkt->pts;
917 580fb5e7 Michael Niedermayer
918
        av_free_packet(pkt);
919 3e9245a9 Michael Niedermayer
        if(pkt->flags&PKT_FLAG_KEY){
920
            i= pkt->stream_index;
921
922
            asf_st= s->streams[i]->priv_data;
923
924 0fd9e6f3 Michael Niedermayer
//            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
925 8d14a25c Michael Niedermayer
            pos= asf_st->packet_pos;
926 09646bab Michael Niedermayer
927 52e54612 Michael Niedermayer
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
928 8d14a25c Michael Niedermayer
            start_pos[i]= asf_st->packet_pos + 1;
929 115329f1 Diego Biurrun
930 3e9245a9 Michael Niedermayer
            if(pkt->stream_index == stream_index)
931
               break;
932
        }
933
    }
934
935
    *ppos= pos;
936 949b1a13 Steve L'Homme
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
937 580fb5e7 Michael Niedermayer
938
    return pts;
939 38376f00 Kevin Kuphal
}
940
941 56c96a22 Michael Niedermayer
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
942
{
943
    GUID g;
944
    ASFContext *asf = s->priv_data;
945
    int64_t gsize, itime;
946
    int64_t pos, current_pos, index_pts;
947
    int i;
948
    int pct,ict;
949
950
    current_pos = url_ftell(&s->pb);
951
952
    url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
953
    get_guid(&s->pb, &g);
954
    if (!memcmp(&g, &index_guid, sizeof(GUID))) {
955
        gsize = get_le64(&s->pb);
956
        get_guid(&s->pb, &g);
957
        itime=get_le64(&s->pb);
958
        pct=get_le32(&s->pb);
959
        ict=get_le32(&s->pb);
960 ccd3228e Dominik Mierzejewski
        av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
961 56c96a22 Michael Niedermayer
962
        for (i=0;i<ict;i++){
963
            int pktnum=get_le32(&s->pb);
964
            int pktct =get_le16(&s->pb);
965
            av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
966
967
            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
968
            index_pts=av_rescale(itime, i, 10000);
969
970
            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
971
        }
972 52e54612 Michael Niedermayer
        asf->index_read= 1;
973 56c96a22 Michael Niedermayer
    }
974
    url_fseek(&s->pb, current_pos, SEEK_SET);
975
}
976
977 3ba1438d Michael Niedermayer
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
978 2a10020b Zdenek Kabelac
{
979 afda223c Fabrice Bellard
    ASFContext *asf = s->priv_data;
980 56c96a22 Michael Niedermayer
    AVStream *st = s->streams[stream_index];
981
    int64_t pos;
982
    int index;
983 115329f1 Diego Biurrun
984 a602556e Michael Niedermayer
    if (asf->packet_size <= 0)
985 38376f00 Kevin Kuphal
        return -1;
986
987 52e54612 Michael Niedermayer
    if (!asf->index_read)
988 56c96a22 Michael Niedermayer
        asf_build_simple_index(s, stream_index);
989
990 52e54612 Michael Niedermayer
    if(!(asf->index_read && st->index_entries)){
991 56c96a22 Michael Niedermayer
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
992
            return -1;
993
    }else{
994
        index= av_index_search_timestamp(st, pts, flags);
995
        if(index<0)
996
            return -1;
997
998
        /* find the position */
999
        pos = st->index_entries[index].pos;
1000
        pts = st->index_entries[index].timestamp;
1001
1002
    // various attempts to find key frame have failed so far
1003
    //    asf_reset_header(s);
1004
    //    url_fseek(&s->pb, pos, SEEK_SET);
1005
    //    key_pos = pos;
1006
    //     for(i=0;i<16;i++){
1007
    //         pos = url_ftell(&s->pb);
1008
    //         if (av_read_frame(s, &pkt) < 0){
1009
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1010
    //             return -1;
1011
    //         }
1012
    //         asf_st = s->streams[stream_index]->priv_data;
1013
    //         pos += st->parser->frame_offset;
1014
    //
1015
    //         if (pkt.size > b) {
1016
    //             b = pkt.size;
1017
    //             key_pos = pos;
1018
    //         }
1019
    //
1020
    //         av_free_packet(&pkt);
1021
    //     }
1022
1023
        /* do the seek */
1024 ccd3228e Dominik Mierzejewski
        av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1025 56c96a22 Michael Niedermayer
        url_fseek(&s->pb, pos, SEEK_SET);
1026
    }
1027 38376f00 Kevin Kuphal
    asf_reset_header(s);
1028
    return 0;
1029 2a10020b Zdenek Kabelac
}
1030
1031 ff70e601 Måns Rullgård
AVInputFormat asf_demuxer = {
1032 c9a65ca8 Fabrice Bellard
    "asf",
1033
    "asf format",
1034
    sizeof(ASFContext),
1035
    asf_probe,
1036
    asf_read_header,
1037
    asf_read_packet,
1038
    asf_read_close,
1039 2a10020b Zdenek Kabelac
    asf_read_seek,
1040 8d14a25c Michael Niedermayer
    asf_read_pts,
1041 c9a65ca8 Fabrice Bellard
};