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ffmpeg / libavformat / asfdec.c @ e4e234fa

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1 de6d9b64 Fabrice Bellard
/*
2 7fbde343 Aurelien Jacobs
 * ASF compatible demuxer
3 406792e7 Diego Biurrun
 * 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 245976da Diego Biurrun
22 c9d7cd6d Baptiste Coudurier
//#define DEBUG
23
24 245976da Diego Biurrun
#include "libavutil/common.h"
25 5f1ac36d Cyril Comparon
#include "libavutil/avstring.h"
26 245976da Diego Biurrun
#include "libavcodec/mpegaudio.h"
27 de6d9b64 Fabrice Bellard
#include "avformat.h"
28 9d9f4119 Måns Rullgård
#include "riff.h"
29 542993b0 Konstantin Andreyev
#include "asf.h"
30 72be7db4 Reimar Döffinger
#include "asfcrypt.h"
31 5f1ac36d Cyril Comparon
#include "avlanguage.h"
32 de6d9b64 Fabrice Bellard
33 9686df2b Diego Biurrun
void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
34 49ce700a Björn Axelsson
35 580fb5e7 Michael Niedermayer
#undef NDEBUG
36
#include <assert.h>
37
38 30cdfb49 Måns Rullgård
#define ASF_MAX_STREAMS 127
39 615b92fd Konstantin Andreyev
#define FRAME_HEADER_SIZE 17
40 115329f1 Diego Biurrun
// Fix Me! FRAME_HEADER_SIZE may be different.
41 615b92fd Konstantin Andreyev
42 b8b00d94 Reimar Döffinger
static const ff_asf_guid index_guid = {
43 24c14d6d Michael Niedermayer
    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
44 de6d9b64 Fabrice Bellard
};
45
46 b8b00d94 Reimar Döffinger
static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
47 0e3b6a6f Ryan Martell
    0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
48
};
49 de6d9b64 Fabrice Bellard
/**********************************/
50
/* decoding */
51
52
#ifdef DEBUG
53 5082f759 François Revol
#define PRINT_IF_GUID(g,cmp) \
54 a750050f Peter Ross
if (!ff_guidcmp(g, &cmp)) \
55 dfd2a005 Luca Barbato
    av_dlog(NULL, "(GUID: %s) ", #cmp)
56 5082f759 François Revol
57 b8b00d94 Reimar Döffinger
static void print_guid(const ff_asf_guid *g)
58 de6d9b64 Fabrice Bellard
{
59
    int i;
60 17af0525 Aurelien Jacobs
    PRINT_IF_GUID(g, ff_asf_header);
61
    else PRINT_IF_GUID(g, ff_asf_file_header);
62
    else PRINT_IF_GUID(g, ff_asf_stream_header);
63
    else PRINT_IF_GUID(g, ff_asf_audio_stream);
64
    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
65
    else PRINT_IF_GUID(g, ff_asf_video_stream);
66
    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
67
    else PRINT_IF_GUID(g, ff_asf_command_stream);
68
    else PRINT_IF_GUID(g, ff_asf_comment_header);
69
    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
70
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
71
    else PRINT_IF_GUID(g, ff_asf_data_header);
72 5082f759 François Revol
    else PRINT_IF_GUID(g, index_guid);
73 17af0525 Aurelien Jacobs
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
74
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
75
    else PRINT_IF_GUID(g, ff_asf_my_guid);
76
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
77
    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
78
    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
79
    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
80
    else PRINT_IF_GUID(g, ff_asf_metadata_header);
81 88b51ea9 Vladimir Pantelic
    else PRINT_IF_GUID(g, ff_asf_marker_header);
82 0e3b6a6f Ryan Martell
    else PRINT_IF_GUID(g, stream_bitrate_guid);
83 5f1ac36d Cyril Comparon
    else PRINT_IF_GUID(g, ff_asf_language_guid);
84 5082f759 François Revol
    else
85 dfd2a005 Luca Barbato
        av_dlog(NULL, "(GUID: unknown) ");
86 24c14d6d Michael Niedermayer
    for(i=0;i<16;i++)
87 dfd2a005 Luca Barbato
        av_dlog(NULL, " 0x%02x,", (*g)[i]);
88
    av_dlog(NULL, "}\n");
89 de6d9b64 Fabrice Bellard
}
90 6df84c3a Alex Beregszaszi
#undef PRINT_IF_GUID
91 f94981ea Måns Rullgård
#else
92
#define print_guid(g)
93 de6d9b64 Fabrice Bellard
#endif
94
95 a750050f Peter Ross
void ff_get_guid(ByteIOContext *s, ff_asf_guid *g)
96 de6d9b64 Fabrice Bellard
{
97 24c14d6d Michael Niedermayer
    assert(sizeof(*g) == 16);
98 3dc761a4 Baptiste Coudurier
    get_buffer(s, *g, sizeof(*g));
99 de6d9b64 Fabrice Bellard
}
100
101 c9a65ca8 Fabrice Bellard
static int asf_probe(AVProbeData *pd)
102
{
103
    /* check file header */
104 a750050f Peter Ross
    if (!ff_guidcmp(pd->buf, &ff_asf_header))
105 c9a65ca8 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
106
    else
107
        return 0;
108
}
109
110 30e88789 Michael Niedermayer
static int get_value(ByteIOContext *pb, int type){
111
    switch(type){
112
        case 2: return get_le32(pb);
113
        case 3: return get_le32(pb);
114
        case 4: return get_le64(pb);
115
        case 5: return get_le16(pb);
116
        default:return INT_MIN;
117
    }
118
}
119
120 20e2a7ae Aurelien Jacobs
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
121
{
122 12ad6671 Michael Niedermayer
    char *value;
123 04295054 Anton Khirnov
    int64_t off = url_ftell(s->pb);
124 12ad6671 Michael Niedermayer
125 fce44489 Anton Khirnov
    if ((unsigned)len >= (UINT_MAX - 1)/2)
126 12ad6671 Michael Niedermayer
        return;
127
128 fce44489 Anton Khirnov
    value = av_malloc(2*len+1);
129 12ad6671 Michael Niedermayer
    if (!value)
130 04295054 Anton Khirnov
        goto finish;
131 12ad6671 Michael Niedermayer
132 6538c0f1 Benoit Fouet
    if (type == 0) {         // UTF16-LE
133 93b78d12 Anton Khirnov
        avio_get_str16le(s->pb, len, value, 2*len + 1);
134 6538c0f1 Benoit Fouet
    } else if (type > 1 && type <= 5) {  // boolean or DWORD or QWORD or WORD
135 20e2a7ae Aurelien Jacobs
        uint64_t num = get_value(s->pb, type);
136 12ad6671 Michael Niedermayer
        snprintf(value, len, "%"PRIu64, num);
137 20e2a7ae Aurelien Jacobs
    } else {
138 27e74927 Benoit Fouet
        av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
139 04295054 Anton Khirnov
        goto finish;
140 20e2a7ae Aurelien Jacobs
    }
141 fce44489 Anton Khirnov
    av_metadata_set2(&s->metadata, key, value, 0);
142 04295054 Anton Khirnov
finish:
143 fce44489 Anton Khirnov
    av_freep(&value);
144 04295054 Anton Khirnov
    url_fseek(s->pb, off + len, SEEK_SET);
145 20e2a7ae Aurelien Jacobs
}
146
147 de6d9b64 Fabrice Bellard
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
148
{
149 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
150 b8b00d94 Reimar Döffinger
    ff_asf_guid g;
151 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
152 de6d9b64 Fabrice Bellard
    AVStream *st;
153
    ASFStream *asf_st;
154 e095026a Fabrice Bellard
    int size, i;
155 0c1a9eda Zdenek Kabelac
    int64_t gsize;
156 30e88789 Michael Niedermayer
    AVRational dar[128];
157 d8470737 Zuxy Meng
    uint32_t bitrate[128];
158 30e88789 Michael Niedermayer
159
    memset(dar, 0, sizeof(dar));
160 d8470737 Zuxy Meng
    memset(bitrate, 0, sizeof(bitrate));
161 de6d9b64 Fabrice Bellard
162 a750050f Peter Ross
    ff_get_guid(pb, &g);
163
    if (ff_guidcmp(&g, &ff_asf_header))
164 ccafd472 Baptiste Coudurier
        return -1;
165 de6d9b64 Fabrice Bellard
    get_le64(pb);
166
    get_le32(pb);
167
    get_byte(pb);
168
    get_byte(pb);
169 2141dc37 Zdenek Kabelac
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
170 de6d9b64 Fabrice Bellard
    for(;;) {
171 cb0061d4 Michael Niedermayer
        uint64_t gpos= url_ftell(pb);
172 93b78d12 Anton Khirnov
        int ret;
173 a750050f Peter Ross
        ff_get_guid(pb, &g);
174 de6d9b64 Fabrice Bellard
        gsize = get_le64(pb);
175 dfd2a005 Luca Barbato
        av_dlog(s, "%08"PRIx64": ", gpos);
176 de6d9b64 Fabrice Bellard
        print_guid(&g);
177 dfd2a005 Luca Barbato
        av_dlog(s, "  size=0x%"PRIx64"\n", gsize);
178 a750050f Peter Ross
        if (!ff_guidcmp(&g, &ff_asf_data_header)) {
179 09d9672a Michael Niedermayer
            asf->data_object_offset = url_ftell(pb);
180
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
181
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
182
                asf->data_object_size = gsize - 24;
183
            } else {
184
                asf->data_object_size = (uint64_t)-1;
185
            }
186
            break;
187
        }
188 de6d9b64 Fabrice Bellard
        if (gsize < 24)
189 ccafd472 Baptiste Coudurier
            return -1;
190 a750050f Peter Ross
        if (!ff_guidcmp(&g, &ff_asf_file_header)) {
191
            ff_get_guid(pb, &asf->hdr.guid);
192 bb270c08 Diego Biurrun
            asf->hdr.file_size          = get_le64(pb);
193
            asf->hdr.create_time        = get_le64(pb);
194 6bb2a2df Michael Niedermayer
            asf->nb_packets             = get_le64(pb);
195 bb270c08 Diego Biurrun
            asf->hdr.play_time          = get_le64(pb);
196 b4bbcd63 Rafaël Carré
            asf->hdr.send_time          = get_le64(pb);
197 bb270c08 Diego Biurrun
            asf->hdr.preroll            = get_le32(pb);
198
            asf->hdr.ignore             = get_le32(pb);
199
            asf->hdr.flags              = get_le32(pb);
200
            asf->hdr.min_pktsize        = get_le32(pb);
201
            asf->hdr.max_pktsize        = get_le32(pb);
202
            asf->hdr.max_bitrate        = get_le32(pb);
203 91d19d47 Ronald S. Bultje
            s->packet_size = asf->hdr.max_pktsize;
204 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
205 72415b2a Stefano Sabatini
            enum AVMediaType type;
206 fb65d2ca Diego Pettenò
            int type_specific_size, sizeX;
207 7ad5455c Michael Niedermayer
            uint64_t total_size;
208 de6d9b64 Fabrice Bellard
            unsigned int tag1;
209 371bf806 Michael Niedermayer
            int64_t pos1, pos2, start_time;
210 6fea687e John Donaghy
            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
211 2a10020b Zdenek Kabelac
212 30cdfb49 Måns Rullgård
            if (s->nb_streams == ASF_MAX_STREAMS) {
213
                av_log(s, AV_LOG_ERROR, "too many streams\n");
214
                return AVERROR(EINVAL);
215
            }
216
217 de6d9b64 Fabrice Bellard
            pos1 = url_ftell(pb);
218
219 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
220 de6d9b64 Fabrice Bellard
            if (!st)
221 ccafd472 Baptiste Coudurier
                return AVERROR(ENOMEM);
222 9ee91c2f Michael Niedermayer
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
223 de6d9b64 Fabrice Bellard
            asf_st = av_mallocz(sizeof(ASFStream));
224
            if (!asf_st)
225 ccafd472 Baptiste Coudurier
                return AVERROR(ENOMEM);
226 de6d9b64 Fabrice Bellard
            st->priv_data = asf_st;
227 371bf806 Michael Niedermayer
            start_time = asf->hdr.preroll;
228
229 5f1ac36d Cyril Comparon
            asf_st->stream_language_index = 128; // invalid stream index means no language info
230
231 73fe1052 Ryan Martell
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
232 f2086fb5 Josh Harris
                st->duration = asf->hdr.play_time /
233 371bf806 Michael Niedermayer
                    (10000000 / 1000) - start_time;
234 73fe1052 Ryan Martell
            }
235 a750050f Peter Ross
            ff_get_guid(pb, &g);
236 88141c91 Michael Niedermayer
237
            test_for_ext_stream_audio = 0;
238 a750050f Peter Ross
            if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
239 72415b2a Stefano Sabatini
                type = AVMEDIA_TYPE_AUDIO;
240 a750050f Peter Ross
            } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
241 72415b2a Stefano Sabatini
                type = AVMEDIA_TYPE_VIDEO;
242 a750050f Peter Ross
            } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
243 a3ab7c32 Martin Storsjö
                type = AVMEDIA_TYPE_VIDEO;
244
                st->codec->codec_id = CODEC_ID_MJPEG;
245 a750050f Peter Ross
            } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
246 72415b2a Stefano Sabatini
                type = AVMEDIA_TYPE_DATA;
247 a750050f Peter Ross
            } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
248 88141c91 Michael Niedermayer
                test_for_ext_stream_audio = 1;
249 72415b2a Stefano Sabatini
                type = AVMEDIA_TYPE_UNKNOWN;
250 de6d9b64 Fabrice Bellard
            } else {
251 ccafd472 Baptiste Coudurier
                return -1;
252 de6d9b64 Fabrice Bellard
            }
253 a750050f Peter Ross
            ff_get_guid(pb, &g);
254 de6d9b64 Fabrice Bellard
            total_size = get_le64(pb);
255 2e7973bb Roman Shaposhnik
            type_specific_size = get_le32(pb);
256 de6d9b64 Fabrice Bellard
            get_le32(pb);
257 bb270c08 Diego Biurrun
            st->id = get_le16(pb) & 0x7f; /* stream id */
258 2a10020b Zdenek Kabelac
            // mapping of asf ID to AV stream ID;
259 247eadca Fabrice Bellard
            asf->asfid2avid[st->id] = s->nb_streams - 1;
260 2a10020b Zdenek Kabelac
261 de6d9b64 Fabrice Bellard
            get_le32(pb);
262 88141c91 Michael Niedermayer
263
            if (test_for_ext_stream_audio) {
264 a750050f Peter Ross
                ff_get_guid(pb, &g);
265
                if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
266 72415b2a Stefano Sabatini
                    type = AVMEDIA_TYPE_AUDIO;
267 6fea687e John Donaghy
                    is_dvr_ms_audio=1;
268 a750050f Peter Ross
                    ff_get_guid(pb, &g);
269 88141c91 Michael Niedermayer
                    get_le32(pb);
270
                    get_le32(pb);
271
                    get_le32(pb);
272 a750050f Peter Ross
                    ff_get_guid(pb, &g);
273 88141c91 Michael Niedermayer
                    get_le32(pb);
274
                }
275
            }
276
277 bb270c08 Diego Biurrun
            st->codec->codec_type = type;
278 72415b2a Stefano Sabatini
            if (type == AVMEDIA_TYPE_AUDIO) {
279 1a40491e Daniel Verkamp
                ff_get_wav_header(pb, st->codec, type_specific_size);
280 6fea687e John Donaghy
                if (is_dvr_ms_audio) {
281
                    // codec_id and codec_tag are unreliable in dvr_ms
282
                    // files. Set them later by probing stream.
283 0bef08e5 Michael Niedermayer
                    st->codec->codec_id = CODEC_ID_PROBE;
284 6fea687e John Donaghy
                    st->codec->codec_tag = 0;
285
                }
286 e7f73adb Alex Converse
                if (st->codec->codec_id == CODEC_ID_AAC) {
287
                    st->need_parsing = AVSTREAM_PARSE_NONE;
288
                } else {
289 e9259f8d Alex Converse
                    st->need_parsing = AVSTREAM_PARSE_FULL;
290 e7f73adb Alex Converse
                }
291 bb270c08 Diego Biurrun
                /* We have to init the frame size at some point .... */
292
                pos2 = url_ftell(pb);
293 b9c6d01b Michael Niedermayer
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
294 bb270c08 Diego Biurrun
                    asf_st->ds_span = get_byte(pb);
295
                    asf_st->ds_packet_size = get_le16(pb);
296
                    asf_st->ds_chunk_size = get_le16(pb);
297 6bb2a2df Michael Niedermayer
                    get_le16(pb); //ds_data_size
298
                    get_byte(pb); //ds_silence_data
299 bb270c08 Diego Biurrun
                }
300
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
301
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
302
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
303
                if (asf_st->ds_span > 1) {
304
                    if (!asf_st->ds_chunk_size
305 05219463 Michael Niedermayer
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
306
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
307 bb270c08 Diego Biurrun
                        asf_st->ds_span = 0; // disable descrambling
308
                }
309 01f4895c Michael Niedermayer
                switch (st->codec->codec_id) {
310 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
311 01f4895c Michael Niedermayer
                    st->codec->frame_size = MPA_FRAME_SIZE;
312 f80c1ac0 Philip Gladstone
                    break;
313
                case CODEC_ID_PCM_S16LE:
314
                case CODEC_ID_PCM_S16BE:
315
                case CODEC_ID_PCM_U16LE:
316
                case CODEC_ID_PCM_U16BE:
317
                case CODEC_ID_PCM_S8:
318
                case CODEC_ID_PCM_U8:
319
                case CODEC_ID_PCM_ALAW:
320
                case CODEC_ID_PCM_MULAW:
321 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
322 f80c1ac0 Philip Gladstone
                    break;
323
                default:
324
                    /* This is probably wrong, but it prevents a crash later */
325 01f4895c Michael Niedermayer
                    st->codec->frame_size = 1;
326 f80c1ac0 Philip Gladstone
                    break;
327
                }
328 fed79592 Martin Storsjö
            } else if (type == AVMEDIA_TYPE_VIDEO &&
329 d970ec75 Martin Storsjö
                       gsize - (url_ftell(pb) - pos1 + 24) >= 51) {
330 bb270c08 Diego Biurrun
                get_le32(pb);
331 de6d9b64 Fabrice Bellard
                get_le32(pb);
332
                get_byte(pb);
333
                size = get_le16(pb); /* size */
334 0ffd77b9 Michael Niedermayer
                sizeX= get_le32(pb); /* size */
335 01f4895c Michael Niedermayer
                st->codec->width = get_le32(pb);
336 bb270c08 Diego Biurrun
                st->codec->height = get_le32(pb);
337 2a10020b Zdenek Kabelac
                /* not available for asf */
338 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
339 dd1c8f3e Luca Abeni
                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
340 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
341 bb270c08 Diego Biurrun
                url_fskip(pb, 20);
342 871e62e5 Benoit Fouet
//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
343 0ffd77b9 Michael Niedermayer
                size= sizeX;
344 bb270c08 Diego Biurrun
                if (size > 40) {
345
                    st->codec->extradata_size = size - 40;
346
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
347
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
348
                }
349 5e29abf8 Roberto Togni
350 6d050dd6 avcoder
                /* Extract palette from extradata if bpp <= 8 */
351
                /* This code assumes that extradata contains only palette */
352
                /* This is true for all paletted codecs implemented in ffmpeg */
353
                if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
354
                    st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
355 63613fe6 Måns Rullgård
#if HAVE_BIGENDIAN
356 6d050dd6 avcoder
                    for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
357 8fc0162a Måns Rullgård
                        st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
358 5e29abf8 Roberto Togni
#else
359 6d050dd6 avcoder
                    memcpy(st->codec->palctrl->palette, st->codec->extradata,
360
                           FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
361 5e29abf8 Roberto Togni
#endif
362 6d050dd6 avcoder
                    st->codec->palctrl->palette_changed = 1;
363
                }
364 5e29abf8 Roberto Togni
365 01f4895c Michael Niedermayer
                st->codec->codec_tag = tag1;
366 1a40491e Daniel Verkamp
                st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
367 31247669 Michael Niedermayer
                if(tag1 == MKTAG('D', 'V', 'R', ' ')){
368 57004ff1 Aurelien Jacobs
                    st->need_parsing = AVSTREAM_PARSE_FULL;
369 31247669 Michael Niedermayer
                    // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
370
                    st->codec->width  =
371
                    st->codec->height = 0;
372
                    av_freep(&st->codec->extradata);
373
                    st->codec->extradata_size=0;
374
                }
375 1ed87f80 Alex Converse
                if(st->codec->codec_id == CODEC_ID_H264)
376
                    st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
377 de6d9b64 Fabrice Bellard
            }
378
            pos2 = url_ftell(pb);
379
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
380 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
381 de6d9b64 Fabrice Bellard
            int len1, len2, len3, len4, len5;
382
383
            len1 = get_le16(pb);
384
            len2 = get_le16(pb);
385
            len3 = get_le16(pb);
386
            len4 = get_le16(pb);
387
            len5 = get_le16(pb);
388 20e2a7ae Aurelien Jacobs
            get_tag(s, "title"    , 0, len1);
389
            get_tag(s, "author"   , 0, len2);
390
            get_tag(s, "copyright", 0, len3);
391
            get_tag(s, "comment"  , 0, len4);
392 bb270c08 Diego Biurrun
            url_fskip(pb, len5);
393 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &stream_bitrate_guid)) {
394 0e3b6a6f Ryan Martell
            int stream_count = get_le16(pb);
395
            int j;
396
397 871e62e5 Benoit Fouet
//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
398
//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
399 0e3b6a6f Ryan Martell
            for(j = 0; j < stream_count; j++) {
400
                int flags, bitrate, stream_id;
401
402
                flags= get_le16(pb);
403
                bitrate= get_le32(pb);
404
                stream_id= (flags & 0x7f);
405 871e62e5 Benoit Fouet
//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
406 a9054d91 Björn Axelsson
                asf->stream_bitrates[stream_id]= bitrate;
407 0e3b6a6f Ryan Martell
            }
408 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
409 5f1ac36d Cyril Comparon
            int j;
410
            int stream_count = get_le16(pb);
411
            for(j = 0; j < stream_count; j++) {
412
                char lang[6];
413
                unsigned int lang_len = get_byte(pb);
414 93b78d12 Anton Khirnov
                if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
415
                    url_fskip(pb, lang_len - ret);
416 5f1ac36d Cyril Comparon
                if (j < 128)
417
                    av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
418
            }
419 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
420 6d050dd6 avcoder
            int desc_count, i;
421
422
            desc_count = get_le16(pb);
423
            for(i=0;i<desc_count;i++) {
424
                    int name_len,value_type,value_len;
425
                    char name[1024];
426
427
                    name_len = get_le16(pb);
428 4a3104a9 Anton Khirnov
                    if (name_len%2)     // must be even, broken lavf versions wrote len-1
429
                        name_len += 1;
430 93b78d12 Anton Khirnov
                    if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
431
                        url_fskip(pb, name_len - ret);
432 6d050dd6 avcoder
                    value_type = get_le16(pb);
433
                    value_len  = get_le16(pb);
434 514b73cf Benoit Fouet
                    if (!value_type && value_len%2)
435 4a3104a9 Anton Khirnov
                        value_len += 1;
436 6ac6e3d1 Richard Buteau
                    /**
437
                     * My sample has that stream set to 0 maybe that mean the container.
438
                     * Asf stream count start at 1. I am using 0 to the container value since it's unused
439
                     */
440
                    if (!strcmp(name, "AspectRatioX")){
441
                        dar[0].num= get_value(s->pb, value_type);
442
                    } else if(!strcmp(name, "AspectRatioY")){
443
                        dar[0].den= get_value(s->pb, value_type);
444 b7d56a17 Carl Eugen Hoyos
                    } else
445
                        get_tag(s, name, value_type, value_len);
446 6d050dd6 avcoder
            }
447 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
448 30e88789 Michael Niedermayer
            int n, stream_num, name_len, value_len, value_type, value_num;
449
            n = get_le16(pb);
450
451
            for(i=0;i<n;i++) {
452
                char name[1024];
453
454
                get_le16(pb); //lang_list_index
455
                stream_num= get_le16(pb);
456
                name_len=   get_le16(pb);
457
                value_type= get_le16(pb);
458
                value_len=  get_le32(pb);
459
460 93b78d12 Anton Khirnov
                if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
461
                    url_fskip(pb, name_len - ret);
462 871e62e5 Benoit Fouet
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
463 755bfeab Diego Biurrun
                value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
464 30e88789 Michael Niedermayer
                url_fskip(pb, value_len - 2);
465
466
                if(stream_num<128){
467
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
468
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
469
                }
470
            }
471 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
472 88141c91 Michael Niedermayer
            int ext_len, payload_ext_ct, stream_ct;
473 d8470737 Zuxy Meng
            uint32_t ext_d, leak_rate, stream_num;
474 5f1ac36d Cyril Comparon
            unsigned int stream_languageid_index;
475 88141c91 Michael Niedermayer
476 de3ae959 Michael Niedermayer
            get_le64(pb); // starttime
477
            get_le64(pb); // endtime
478 d8470737 Zuxy Meng
            leak_rate = get_le32(pb); // leak-datarate
479 de3ae959 Michael Niedermayer
            get_le32(pb); // bucket-datasize
480
            get_le32(pb); // init-bucket-fullness
481
            get_le32(pb); // alt-leak-datarate
482
            get_le32(pb); // alt-bucket-datasize
483
            get_le32(pb); // alt-init-bucket-fullness
484
            get_le32(pb); // max-object-size
485
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
486 d8470737 Zuxy Meng
            stream_num = get_le16(pb); // stream-num
487 5f1ac36d Cyril Comparon
488
            stream_languageid_index = get_le16(pb); // stream-language-id-index
489
            if (stream_num < 128)
490
                asf->streams[stream_num].stream_language_index = stream_languageid_index;
491
492 de3ae959 Michael Niedermayer
            get_le64(pb); // avg frametime in 100ns units
493
            stream_ct = get_le16(pb); //stream-name-count
494
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
495 88141c91 Michael Niedermayer
496 d8470737 Zuxy Meng
            if (stream_num < 128)
497
                bitrate[stream_num] = leak_rate;
498
499 88141c91 Michael Niedermayer
            for (i=0; i<stream_ct; i++){
500
                get_le16(pb);
501
                ext_len = get_le16(pb);
502
                url_fseek(pb, ext_len, SEEK_CUR);
503
            }
504
505
            for (i=0; i<payload_ext_ct; i++){
506 a750050f Peter Ross
                ff_get_guid(pb, &g);
507 88141c91 Michael Niedermayer
                ext_d=get_le16(pb);
508
                ext_len=get_le32(pb);
509
                url_fseek(pb, ext_len, SEEK_CUR);
510
            }
511
512
            // there could be a optional stream properties object to follow
513
            // if so the next iteration will pick it up
514 1d4c1c3b Michael Niedermayer
            continue;
515 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
516 de6d9b64 Fabrice Bellard
            int v1, v2;
517 a750050f Peter Ross
            ff_get_guid(pb, &g);
518 de6d9b64 Fabrice Bellard
            v1 = get_le32(pb);
519
            v2 = get_le16(pb);
520 1d4c1c3b Michael Niedermayer
            continue;
521 a750050f Peter Ross
        } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
522 88b51ea9 Vladimir Pantelic
            int i, count, name_len;
523
            char name[1024];
524
525
            get_le64(pb);            // reserved 16 bytes
526
            get_le64(pb);            // ...
527
            count = get_le32(pb);    // markers count
528
            get_le16(pb);            // reserved 2 bytes
529
            name_len = get_le16(pb); // name length
530
            for(i=0;i<name_len;i++){
531
                get_byte(pb); // skip the name
532
            }
533
534
            for(i=0;i<count;i++){
535
                int64_t pres_time;
536
                int name_len;
537
538
                get_le64(pb);             // offset, 8 bytes
539
                pres_time = get_le64(pb); // presentation time
540
                get_le16(pb);             // entry length
541
                get_le32(pb);             // send time
542
                get_le32(pb);             // flags
543
                name_len = get_le32(pb);  // name length
544 93b78d12 Anton Khirnov
                if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
545
                    url_fskip(pb, name_len - ret);
546 88b51ea9 Vladimir Pantelic
                ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
547
            }
548 de6d9b64 Fabrice Bellard
        } else if (url_feof(pb)) {
549 ccafd472 Baptiste Coudurier
            return -1;
550 de6d9b64 Fabrice Bellard
        } else {
551 febd1c90 Daniel G. Taylor
            if (!s->keylen) {
552 a750050f Peter Ross
                if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
553 febd1c90 Daniel G. Taylor
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
554 a750050f Peter Ross
                } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
555 febd1c90 Daniel G. Taylor
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
556 a750050f Peter Ross
                } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
557 febd1c90 Daniel G. Taylor
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
558
                }
559
            }
560 de6d9b64 Fabrice Bellard
        }
561 cb0061d4 Michael Niedermayer
        if(url_ftell(pb) != gpos + gsize)
562
            av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
563
        url_fseek(pb, gpos + gsize, SEEK_SET);
564 de6d9b64 Fabrice Bellard
    }
565 a750050f Peter Ross
    ff_get_guid(pb, &g);
566 de6d9b64 Fabrice Bellard
    get_le64(pb);
567
    get_byte(pb);
568
    get_byte(pb);
569 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
570 ccafd472 Baptiste Coudurier
        return -1;
571 2141dc37 Zdenek Kabelac
    asf->data_offset = url_ftell(pb);
572 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
573
574 30e88789 Michael Niedermayer
575
    for(i=0; i<128; i++){
576
        int stream_num= asf->asfid2avid[i];
577 d8470737 Zuxy Meng
        if(stream_num>=0){
578 59729451 Aurelien Jacobs
            AVStream *st = s->streams[stream_num];
579
            if (!st->codec->bit_rate)
580
                st->codec->bit_rate = bitrate[i];
581 6ac6e3d1 Richard Buteau
            if (dar[i].num > 0 && dar[i].den > 0){
582 59729451 Aurelien Jacobs
                av_reduce(&st->sample_aspect_ratio.num,
583
                          &st->sample_aspect_ratio.den,
584 18d915dd Zuxy Meng
                          dar[i].num, dar[i].den, INT_MAX);
585 b9f9e59a Stefano Sabatini
            } else if ((dar[0].num > 0) && (dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
586 6ac6e3d1 Richard Buteau
                av_reduce(&st->sample_aspect_ratio.num,
587
                          &st->sample_aspect_ratio.den,
588
                          dar[0].num, dar[0].den, INT_MAX);
589
590
//av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
591 5f1ac36d Cyril Comparon
592
            // copy and convert language codes to the frontend
593
            if (asf->streams[i].stream_language_index < 128) {
594
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
595
                if (rfc1766 && strlen(rfc1766) > 1) {
596
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
597
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
598
                    if (iso6392)
599 2ef6c124 Stefano Sabatini
                        av_metadata_set2(&st->metadata, "language", iso6392, 0);
600 5f1ac36d Cyril Comparon
                }
601
            }
602 30e88789 Michael Niedermayer
        }
603
    }
604
605 ad7768f4 Anton Khirnov
    ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
606 03700d39 Anton Khirnov
607 de6d9b64 Fabrice Bellard
    return 0;
608
}
609
610 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
611
    switch (bits & 3) \
612
    { \
613
    case 3: var = get_le32(pb); rsize += 4; break; \
614
    case 2: var = get_le16(pb); rsize += 2; break; \
615
    case 1: var = get_byte(pb); rsize++; break; \
616
    default: var = defval; break; \
617
    }
618
619 277a28e8 Ronald S. Bultje
/**
620
 * Load a single ASF packet into the demuxer.
621
 * @param s demux context
622
 * @param pb context to read data from
623 32e543f8 Benoit Fouet
 * @return 0 on success, <0 on error
624 277a28e8 Ronald S. Bultje
 */
625
static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
626 de6d9b64 Fabrice Bellard
{
627
    ASFContext *asf = s->priv_data;
628 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
629 0c0d17f3 Michael Niedermayer
    int rsize = 8;
630 0fd9e6f3 Michael Niedermayer
    int c, d, e, off;
631
632 68a10b40 Reimar Döffinger
    // if we do not know packet size, allow skipping up to 32 kB
633
    off= 32768;
634
    if (s->packet_size > 0)
635 b098b309 Reimar Döffinger
        off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
636 0fd9e6f3 Michael Niedermayer
637
    c=d=e=-1;
638
    while(off-- > 0){
639
        c=d; d=e;
640
        e= get_byte(pb);
641
        if(c == 0x82 && !d && !e)
642
            break;
643
    }
644 115329f1 Diego Biurrun
645 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
646 2078ca16 Ronald S. Bultje
        /**
647
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
648
         * if the packet sync code above triggers -EAGAIN). This does not
649
         * imply complete -EAGAIN handling support at random positions in
650
         * the stream.
651
         */
652
        if (url_ferror(pb) == AVERROR(EAGAIN))
653
            return AVERROR(EAGAIN);
654 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
655 bb270c08 Diego Biurrun
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
656 2a10020b Zdenek Kabelac
    }
657 0c0d17f3 Michael Niedermayer
    if ((c & 0x8f) == 0x82) {
658 0fd9e6f3 Michael Niedermayer
        if (d || e) {
659 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
660 bb270c08 Diego Biurrun
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
661 f7835507 Michael Niedermayer
            return -1;
662 bb270c08 Diego Biurrun
        }
663 0c0d17f3 Michael Niedermayer
        c= get_byte(pb);
664 0fd9e6f3 Michael Niedermayer
        d= get_byte(pb);
665 0c0d17f3 Michael Niedermayer
        rsize+=3;
666
    }else{
667
        url_fseek(pb, -1, SEEK_CUR); //FIXME
668 de6d9b64 Fabrice Bellard
    }
669 2a10020b Zdenek Kabelac
670 0c0d17f3 Michael Niedermayer
    asf->packet_flags    = c;
671
    asf->packet_property = d;
672 2a10020b Zdenek Kabelac
673 91d19d47 Ronald S. Bultje
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
674 2a10020b Zdenek Kabelac
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
675
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
676
677 5b11e081 Michael Niedermayer
    //the following checks prevent overflows and infinite loops
678 96f0731a Reimar Döffinger
    if(!packet_length || packet_length >= (1U<<29)){
679 5b11e081 Michael Niedermayer
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
680 ceba96cb Michael Niedermayer
        return -1;
681 5b11e081 Michael Niedermayer
    }
682 92216453 Michael Niedermayer
    if(padsize >= packet_length){
683 5b11e081 Michael Niedermayer
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
684 ceba96cb Michael Niedermayer
        return -1;
685 5b11e081 Michael Niedermayer
    }
686
687 2a10020b Zdenek Kabelac
    asf->packet_timestamp = get_le32(pb);
688 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
689 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
690 2a10020b Zdenek Kabelac
691
    if (asf->packet_flags & 0x01) {
692 bb270c08 Diego Biurrun
        asf->packet_segsizetype = get_byte(pb); rsize++;
693 2a10020b Zdenek Kabelac
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
694
    } else {
695 bb270c08 Diego Biurrun
        asf->packet_segments = 1;
696 2a10020b Zdenek Kabelac
        asf->packet_segsizetype = 0x80;
697
    }
698
    asf->packet_size_left = packet_length - padsize - rsize;
699 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
700
        padsize += asf->hdr.min_pktsize - packet_length;
701 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
702 dfd2a005 Luca Barbato
    av_dlog(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
703 de6d9b64 Fabrice Bellard
    return 0;
704
}
705
706 ae60a857 Michael Niedermayer
/**
707
 *
708
 * @return <0 if error
709
 */
710 d7fb5a18 Ronald S. Bultje
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
711 ae60a857 Michael Niedermayer
    ASFContext *asf = s->priv_data;
712
    int rsize = 1;
713
    int num = get_byte(pb);
714 559a55ad Michael Niedermayer
    int64_t ts0, ts1;
715 ae60a857 Michael Niedermayer
716
    asf->packet_segments--;
717
    asf->packet_key_frame = num >> 7;
718
    asf->stream_index = asf->asfid2avid[num & 0x7f];
719
    // sequence should be ignored!
720
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
721
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
722
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
723
//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);
724
    if (asf->packet_replic_size >= 8) {
725
        asf->packet_obj_size = get_le32(pb);
726
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
727
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
728
            return -1;
729
        }
730
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
731 559a55ad Michael Niedermayer
        if(asf->packet_replic_size >= 8+38+4){
732
//            for(i=0; i<asf->packet_replic_size-8; i++)
733
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
734
//            av_log(s, AV_LOG_DEBUG, "\n");
735
            url_fskip(pb, 10);
736
            ts0= get_le64(pb);
737
            ts1= get_le64(pb);
738
            url_fskip(pb, 12);
739
            get_le32(pb);
740
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
741
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
742
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
743
        }else
744
            url_fskip(pb, asf->packet_replic_size - 8);
745 ae60a857 Michael Niedermayer
        rsize += asf->packet_replic_size; // FIXME - check validity
746
    } else if (asf->packet_replic_size==1){
747 efc90ebf Reimar Döffinger
        // multipacket - frag_offset is beginning timestamp
748 ae60a857 Michael Niedermayer
        asf->packet_time_start = asf->packet_frag_offset;
749
        asf->packet_frag_offset = 0;
750
        asf->packet_frag_timestamp = asf->packet_timestamp;
751
752
        asf->packet_time_delta = get_byte(pb);
753
        rsize++;
754
    }else if(asf->packet_replic_size!=0){
755
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
756
        return -1;
757
    }
758
    if (asf->packet_flags & 0x01) {
759
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
760 13f7e4b9 Michael Niedermayer
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
761
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
762
            return -1;
763
        }
764 ae60a857 Michael Niedermayer
        //printf("Fragsize %d\n", asf->packet_frag_size);
765
    } else {
766
        asf->packet_frag_size = asf->packet_size_left - rsize;
767
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
768
    }
769
    if (asf->packet_replic_size == 1) {
770
        asf->packet_multi_size = asf->packet_frag_size;
771
        if (asf->packet_multi_size > asf->packet_size_left)
772
            return -1;
773
    }
774
    asf->packet_size_left -= rsize;
775
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
776
777
    return 0;
778
}
779
780 277a28e8 Ronald S. Bultje
/**
781
 * Parse data from individual ASF packets (which were previously loaded
782
 * with asf_get_packet()).
783
 * @param s demux context
784
 * @param pb context to read data from
785
 * @param pkt pointer to store packet data into
786 32e543f8 Benoit Fouet
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
787 277a28e8 Ronald S. Bultje
 *          packets need to be loaded (through asf_get_packet())
788
 */
789
static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
790 de6d9b64 Fabrice Bellard
{
791
    ASFContext *asf = s->priv_data;
792 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
793
    for (;;) {
794 4172951b Reimar Döffinger
        int ret;
795 ceba96cb Michael Niedermayer
        if(url_feof(pb))
796 799a0722 Ronald S. Bultje
            return AVERROR_EOF;
797 bb270c08 Diego Biurrun
        if (asf->packet_size_left < FRAME_HEADER_SIZE
798
            || asf->packet_segments < 1) {
799
            //asf->packet_size_left <= asf->packet_padsize) {
800
            int ret = asf->packet_size_left + asf->packet_padsize;
801 949b1a13 Steve L'Homme
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
802 5b11e081 Michael Niedermayer
            assert(ret>=0);
803 bb270c08 Diego Biurrun
            /* fail safe */
804
            url_fskip(pb, ret);
805 b04d5d31 Michael Niedermayer
806 022f0b7c Ronald S. Bultje
            asf->packet_pos= url_ftell(pb);
807 b6eaae39 Kohn Emil Dan
            if (asf->data_object_size != (uint64_t)-1 &&
808
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
809 1d0036b0 Ronald S. Bultje
                return AVERROR_EOF; /* Do not exceed the size of the data object */
810 f27544fd Ronald S. Bultje
            return 1;
811 bb270c08 Diego Biurrun
        }
812
        if (asf->packet_time_start == 0) {
813 b0d75d60 Ronald S. Bultje
            if(asf_read_frame_header(s, pb) < 0){
814 ae60a857 Michael Niedermayer
                asf->packet_segments= 0;
815 236116cb Michael Niedermayer
                continue;
816 1305a9d5 Michael Niedermayer
            }
817 bb270c08 Diego Biurrun
            if (asf->stream_index < 0
818 f3356e9c Michael Niedermayer
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
819
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
820
                ) {
821 1359c2d4 Zdenek Kabelac
                asf->packet_time_start = 0;
822 bb270c08 Diego Biurrun
                /* unhandled packet (should not happen) */
823
                url_fskip(pb, asf->packet_frag_size);
824
                asf->packet_size_left -= asf->packet_frag_size;
825 b9866ebc Michael Niedermayer
                if(asf->stream_index < 0)
826 ae60a857 Michael Niedermayer
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
827 1359c2d4 Zdenek Kabelac
                continue;
828 bb270c08 Diego Biurrun
            }
829
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
830
        }
831
        asf_st = asf->asf_st;
832
833
        if (asf->packet_replic_size == 1) {
834 efc90ebf Reimar Döffinger
            // frag_offset is here used as the beginning timestamp
835 bb270c08 Diego Biurrun
            asf->packet_frag_timestamp = asf->packet_time_start;
836
            asf->packet_time_start += asf->packet_time_delta;
837
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
838
            asf->packet_size_left--;
839 2141dc37 Zdenek Kabelac
            asf->packet_multi_size--;
840 bb270c08 Diego Biurrun
            if (asf->packet_multi_size < asf->packet_obj_size)
841
            {
842
                asf->packet_time_start = 0;
843
                url_fskip(pb, asf->packet_multi_size);
844
                asf->packet_size_left -= asf->packet_multi_size;
845 2141dc37 Zdenek Kabelac
                continue;
846 bb270c08 Diego Biurrun
            }
847
            asf->packet_multi_size -= asf->packet_obj_size;
848
            //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);
849
        }
850 60ff1c44 Michael Niedermayer
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
851
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
852
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
853
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
854
                asf_st->frag_offset, asf->packet_frag_size,
855
                asf->packet_obj_size, asf_st->pkt.size);
856
            asf->packet_obj_size= asf_st->pkt.size;
857
        }
858
859 f8f0a0bd Michael Niedermayer
        if (   asf_st->pkt.size != asf->packet_obj_size
860
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
861 200026aa Michael Niedermayer
            if(asf_st->pkt.data){
862
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
863
                asf_st->frag_offset = 0;
864
                av_free_packet(&asf_st->pkt);
865
            }
866 bb270c08 Diego Biurrun
            /* new packet */
867
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
868
            asf_st->seq = asf->packet_seq;
869 eb63b051 Baptiste Coudurier
            asf_st->pkt.dts = asf->packet_frag_timestamp;
870 bb270c08 Diego Biurrun
            asf_st->pkt.stream_index = asf->stream_index;
871 115329f1 Diego Biurrun
            asf_st->pkt.pos =
872
            asf_st->packet_pos= asf->packet_pos;
873
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
874 cc947f04 Jean-Daniel Dupas
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
875 72415b2a Stefano Sabatini
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
876
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
877 bb270c08 Diego Biurrun
                asf->packet_key_frame = 1;
878
            if (asf->packet_key_frame)
879 cc947f04 Jean-Daniel Dupas
                asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
880 bb270c08 Diego Biurrun
        }
881
882
        /* read data */
883
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
884 91d19d47 Ronald S. Bultje
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
885 bb270c08 Diego Biurrun
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
886
        asf->packet_size_left -= asf->packet_frag_size;
887
        if (asf->packet_size_left < 0)
888 2141dc37 Zdenek Kabelac
            continue;
889 4c71d727 Michael Niedermayer
890
        if(   asf->packet_frag_offset >= asf_st->pkt.size
891
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
892
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
893
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
894
            continue;
895
        }
896
897 4172951b Reimar Döffinger
        ret = get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
898
                         asf->packet_frag_size);
899 bf09a019 Reimar Döffinger
        if (ret != asf->packet_frag_size) {
900
            if (ret < 0 || asf->packet_frag_offset + ret == 0)
901
                return ret < 0 ? ret : AVERROR_EOF;
902
            if (asf_st->ds_span > 1) {
903
                // scrambling, we can either drop it completely or fill the remainder
904
                // TODO: should we fill the whole packet instead of just the current
905
                // fragment?
906
                memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
907
                       asf->packet_frag_size - ret);
908
                ret = asf->packet_frag_size;
909
            } else
910
                // no scrambling, so we can return partial packets
911
                av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
912
        }
913 72be7db4 Reimar Döffinger
        if (s->key && s->keylen == 20)
914
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
915 bf09a019 Reimar Döffinger
                            ret);
916
        asf_st->frag_offset += ret;
917 bb270c08 Diego Biurrun
        /* test if whole packet is read */
918
        if (asf_st->frag_offset == asf_st->pkt.size) {
919 da0b94f5 Michael Niedermayer
            //workaround for macroshit radio DVR-MS files
920
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
921
               && asf_st->pkt.size > 100){
922
                int i;
923
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
924
                if(i == asf_st->pkt.size){
925
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
926
                    asf_st->frag_offset = 0;
927
                    av_free_packet(&asf_st->pkt);
928
                    continue;
929
                }
930
            }
931
932 bb270c08 Diego Biurrun
            /* return packet */
933
            if (asf_st->ds_span > 1) {
934 05219463 Michael Niedermayer
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
935 b43387d4 Michael Niedermayer
                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
936 05219463 Michael Niedermayer
              }else{
937 bb270c08 Diego Biurrun
                /* packet descrambling */
938 3c3ef81b Reimar Döffinger
                uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
939 bb270c08 Diego Biurrun
                if (newdata) {
940
                    int offset = 0;
941 3c3ef81b Reimar Döffinger
                    memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
942 bb270c08 Diego Biurrun
                    while (offset < asf_st->pkt.size) {
943
                        int off = offset / asf_st->ds_chunk_size;
944
                        int row = off / asf_st->ds_span;
945
                        int col = off % asf_st->ds_span;
946
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
947
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
948 05219463 Michael Niedermayer
949
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
950
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
951 bb270c08 Diego Biurrun
                        memcpy(newdata + offset,
952
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
953
                               asf_st->ds_chunk_size);
954
                        offset += asf_st->ds_chunk_size;
955
                    }
956
                    av_free(asf_st->pkt.data);
957
                    asf_st->pkt.data = newdata;
958
                }
959 05219463 Michael Niedermayer
              }
960 bb270c08 Diego Biurrun
            }
961
            asf_st->frag_offset = 0;
962 b83e83b9 Michael Niedermayer
            *pkt= asf_st->pkt;
963 bb270c08 Diego Biurrun
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
964
            asf_st->pkt.size = 0;
965
            asf_st->pkt.data = 0;
966
            break; // packet completed
967
        }
968 de6d9b64 Fabrice Bellard
    }
969
    return 0;
970
}
971
972 f27544fd Ronald S. Bultje
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
973
{
974
    ASFContext *asf = s->priv_data;
975
976
    for (;;) {
977
        int ret;
978
979
        /* parse cached packets, if any */
980 1d217cdb Ronald S. Bultje
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
981 f27544fd Ronald S. Bultje
            return ret;
982 1d217cdb Ronald S. Bultje
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
983 f27544fd Ronald S. Bultje
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
984
        asf->packet_time_start = 0;
985
    }
986
987
    return 0;
988
}
989
990 38376f00 Kevin Kuphal
// Added to support seeking after packets have been read
991
// If information is not reset, read_packet fails due to
992
// leftover information from previous reads
993
static void asf_reset_header(AVFormatContext *s)
994
{
995
    ASFContext *asf = s->priv_data;
996 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
997
    int i;
998 38376f00 Kevin Kuphal
999
    asf->packet_nb_frames = 0;
1000
    asf->packet_size_left = 0;
1001
    asf->packet_segments = 0;
1002
    asf->packet_flags = 0;
1003
    asf->packet_property = 0;
1004
    asf->packet_timestamp = 0;
1005
    asf->packet_segsizetype = 0;
1006
    asf->packet_segments = 0;
1007
    asf->packet_seq = 0;
1008
    asf->packet_replic_size = 0;
1009
    asf->packet_key_frame = 0;
1010
    asf->packet_padsize = 0;
1011
    asf->packet_frag_offset = 0;
1012
    asf->packet_frag_size = 0;
1013
    asf->packet_frag_timestamp = 0;
1014
    asf->packet_multi_size = 0;
1015
    asf->packet_obj_size = 0;
1016
    asf->packet_time_delta = 0;
1017
    asf->packet_time_start = 0;
1018 115329f1 Diego Biurrun
1019 82b9e4a2 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
1020
        asf_st= s->streams[i]->priv_data;
1021
        av_free_packet(&asf_st->pkt);
1022
        asf_st->frag_offset=0;
1023
        asf_st->seq=0;
1024
    }
1025
    asf->asf_st= NULL;
1026 38376f00 Kevin Kuphal
}
1027
1028 5d25d2a9 Diego Biurrun
static int asf_read_close(AVFormatContext *s)
1029
{
1030
    int i;
1031
1032
    asf_reset_header(s);
1033
    for(i=0;i<s->nb_streams;i++) {
1034
        AVStream *st = s->streams[i];
1035
        av_free(st->codec->palctrl);
1036
    }
1037
    return 0;
1038
}
1039
1040 8d14a25c Michael Niedermayer
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1041 38376f00 Kevin Kuphal
{
1042
    AVPacket pkt1, *pkt = &pkt1;
1043 82b9e4a2 Michael Niedermayer
    ASFStream *asf_st;
1044 580fb5e7 Michael Niedermayer
    int64_t pts;
1045 82b9e4a2 Michael Niedermayer
    int64_t pos= *ppos;
1046 3e9245a9 Michael Niedermayer
    int i;
1047 30cdfb49 Måns Rullgård
    int64_t start_pos[ASF_MAX_STREAMS];
1048 115329f1 Diego Biurrun
1049 3e9245a9 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
1050
        start_pos[i]= pos;
1051
    }
1052 115329f1 Diego Biurrun
1053 68a10b40 Reimar Döffinger
    if (s->packet_size > 0)
1054 b098b309 Reimar Döffinger
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1055 8d14a25c Michael Niedermayer
    *ppos= pos;
1056 899681cd Björn Axelsson
    url_fseek(s->pb, pos, SEEK_SET);
1057 115329f1 Diego Biurrun
1058 82b9e4a2 Michael Niedermayer
//printf("asf_read_pts\n");
1059
    asf_reset_header(s);
1060 3e9245a9 Michael Niedermayer
    for(;;){
1061 82b9e4a2 Michael Niedermayer
        if (av_read_frame(s, pkt) < 0){
1062 0b93103a Michael Niedermayer
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1063 bb270c08 Diego Biurrun
            return AV_NOPTS_VALUE;
1064 82b9e4a2 Michael Niedermayer
        }
1065 115329f1 Diego Biurrun
1066 38cf2a72 Michael Niedermayer
        pts= pkt->pts;
1067 580fb5e7 Michael Niedermayer
1068
        av_free_packet(pkt);
1069 cc947f04 Jean-Daniel Dupas
        if(pkt->flags&AV_PKT_FLAG_KEY){
1070 3e9245a9 Michael Niedermayer
            i= pkt->stream_index;
1071
1072
            asf_st= s->streams[i]->priv_data;
1073
1074 91d19d47 Ronald S. Bultje
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1075 8d14a25c Michael Niedermayer
            pos= asf_st->packet_pos;
1076 09646bab Michael Niedermayer
1077 52e54612 Michael Niedermayer
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1078 8d14a25c Michael Niedermayer
            start_pos[i]= asf_st->packet_pos + 1;
1079 115329f1 Diego Biurrun
1080 3e9245a9 Michael Niedermayer
            if(pkt->stream_index == stream_index)
1081
               break;
1082
        }
1083
    }
1084
1085
    *ppos= pos;
1086 949b1a13 Steve L'Homme
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1087 580fb5e7 Michael Niedermayer
1088
    return pts;
1089 38376f00 Kevin Kuphal
}
1090
1091 56c96a22 Michael Niedermayer
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1092
{
1093 b8b00d94 Reimar Döffinger
    ff_asf_guid g;
1094 56c96a22 Michael Niedermayer
    ASFContext *asf = s->priv_data;
1095 d728e3cd Michael Niedermayer
    int64_t current_pos= url_ftell(s->pb);
1096 56c96a22 Michael Niedermayer
    int i;
1097
1098 899681cd Björn Axelsson
    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1099 a750050f Peter Ross
    ff_get_guid(s->pb, &g);
1100 77b7c334 Stefan Gehrer
1101
    /* the data object can be followed by other top-level objects,
1102
       skip them until the simple index object is reached */
1103 a750050f Peter Ross
    while (ff_guidcmp(&g, &index_guid)) {
1104 77b7c334 Stefan Gehrer
        int64_t gsize= get_le64(s->pb);
1105
        if (gsize < 24 || url_feof(s->pb)) {
1106
            url_fseek(s->pb, current_pos, SEEK_SET);
1107
            return;
1108
        }
1109
        url_fseek(s->pb, gsize-24, SEEK_CUR);
1110 a750050f Peter Ross
        ff_get_guid(s->pb, &g);
1111 77b7c334 Stefan Gehrer
    }
1112
1113
    {
1114 134271c2 Michael Niedermayer
        int64_t itime, last_pos=-1;
1115 d728e3cd Michael Niedermayer
        int pct, ict;
1116 dc1ed614 Diego Biurrun
        int64_t av_unused gsize= get_le64(s->pb);
1117 a750050f Peter Ross
        ff_get_guid(s->pb, &g);
1118 899681cd Björn Axelsson
        itime=get_le64(s->pb);
1119
        pct=get_le32(s->pb);
1120
        ict=get_le32(s->pb);
1121 871e62e5 Benoit Fouet
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1122 56c96a22 Michael Niedermayer
1123
        for (i=0;i<ict;i++){
1124 899681cd Björn Axelsson
            int pktnum=get_le32(s->pb);
1125
            int pktct =get_le16(s->pb);
1126 91d19d47 Ronald S. Bultje
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1127 d728e3cd Michael Niedermayer
            int64_t index_pts= av_rescale(itime, i, 10000);
1128 56c96a22 Michael Niedermayer
1129 134271c2 Michael Niedermayer
            if(pos != last_pos){
1130 d728e3cd Michael Niedermayer
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1131 91d19d47 Ronald S. Bultje
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1132 134271c2 Michael Niedermayer
            last_pos=pos;
1133
            }
1134 56c96a22 Michael Niedermayer
        }
1135 52e54612 Michael Niedermayer
        asf->index_read= 1;
1136 56c96a22 Michael Niedermayer
    }
1137 899681cd Björn Axelsson
    url_fseek(s->pb, current_pos, SEEK_SET);
1138 56c96a22 Michael Niedermayer
}
1139
1140 3ba1438d Michael Niedermayer
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1141 2a10020b Zdenek Kabelac
{
1142 afda223c Fabrice Bellard
    ASFContext *asf = s->priv_data;
1143 56c96a22 Michael Niedermayer
    AVStream *st = s->streams[stream_index];
1144
    int64_t pos;
1145
    int index;
1146 115329f1 Diego Biurrun
1147 91d19d47 Ronald S. Bultje
    if (s->packet_size <= 0)
1148 38376f00 Kevin Kuphal
        return -1;
1149
1150 fa13095a Björn Axelsson
    /* Try using the protocol's read_seek if available */
1151 fd2982a0 Aurelien Jacobs
    if(s->pb) {
1152 fa13095a Björn Axelsson
        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1153
        if(ret >= 0)
1154
            asf_reset_header(s);
1155 fd2982a0 Aurelien Jacobs
        if (ret != AVERROR(ENOSYS))
1156 cd31f8dc Aurelien Jacobs
            return ret;
1157 fa13095a Björn Axelsson
    }
1158
1159 52e54612 Michael Niedermayer
    if (!asf->index_read)
1160 56c96a22 Michael Niedermayer
        asf_build_simple_index(s, stream_index);
1161
1162 52e54612 Michael Niedermayer
    if(!(asf->index_read && st->index_entries)){
1163 56c96a22 Michael Niedermayer
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1164
            return -1;
1165
    }else{
1166
        index= av_index_search_timestamp(st, pts, flags);
1167
        if(index<0)
1168
            return -1;
1169
1170
        /* find the position */
1171
        pos = st->index_entries[index].pos;
1172
1173
    // various attempts to find key frame have failed so far
1174
    //    asf_reset_header(s);
1175 899681cd Björn Axelsson
    //    url_fseek(s->pb, pos, SEEK_SET);
1176 56c96a22 Michael Niedermayer
    //    key_pos = pos;
1177
    //     for(i=0;i<16;i++){
1178 899681cd Björn Axelsson
    //         pos = url_ftell(s->pb);
1179 56c96a22 Michael Niedermayer
    //         if (av_read_frame(s, &pkt) < 0){
1180
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1181
    //             return -1;
1182
    //         }
1183
    //         asf_st = s->streams[stream_index]->priv_data;
1184
    //         pos += st->parser->frame_offset;
1185
    //
1186
    //         if (pkt.size > b) {
1187
    //             b = pkt.size;
1188
    //             key_pos = pos;
1189
    //         }
1190
    //
1191
    //         av_free_packet(&pkt);
1192
    //     }
1193
1194
        /* do the seek */
1195 871e62e5 Benoit Fouet
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1196 899681cd Björn Axelsson
        url_fseek(s->pb, pos, SEEK_SET);
1197 56c96a22 Michael Niedermayer
    }
1198 38376f00 Kevin Kuphal
    asf_reset_header(s);
1199
    return 0;
1200 2a10020b Zdenek Kabelac
}
1201
1202 c6610a21 Diego Elio Pettenò
AVInputFormat ff_asf_demuxer = {
1203 c9a65ca8 Fabrice Bellard
    "asf",
1204 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("ASF format"),
1205 c9a65ca8 Fabrice Bellard
    sizeof(ASFContext),
1206
    asf_probe,
1207
    asf_read_header,
1208
    asf_read_packet,
1209
    asf_read_close,
1210 2a10020b Zdenek Kabelac
    asf_read_seek,
1211 8d14a25c Michael Niedermayer
    asf_read_pts,
1212 c9a65ca8 Fabrice Bellard
};