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https://github.com/FFmpeg/FFmpeg.git
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febd1c90a6
was provided. Patch by Daniel G. Taylor, dan programmer-art org Originally committed as revision 20209 to svn://svn.ffmpeg.org/ffmpeg/trunk
1157 lines
42 KiB
C
1157 lines
42 KiB
C
/*
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* ASF compatible demuxer
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* Copyright (c) 2000, 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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//#define DEBUG
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#include "libavutil/common.h"
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#include "libavutil/avstring.h"
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#include "libavcodec/mpegaudio.h"
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#include "avformat.h"
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#include "riff.h"
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#include "asf.h"
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#include "asfcrypt.h"
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#include "avlanguage.h"
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void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
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#undef NDEBUG
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#include <assert.h>
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#define FRAME_HEADER_SIZE 17
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// Fix Me! FRAME_HEADER_SIZE may be different.
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static const ff_asf_guid index_guid = {
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0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
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};
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static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
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0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
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};
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/**********************************/
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/* decoding */
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static int guidcmp(const void *g1, const void *g2)
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{
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return memcmp(g1, g2, sizeof(ff_asf_guid));
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}
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#ifdef DEBUG
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#define PRINT_IF_GUID(g,cmp) \
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if (!guidcmp(g, &cmp)) \
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dprintf(NULL, "(GUID: %s) ", #cmp)
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static void print_guid(const ff_asf_guid *g)
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{
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int i;
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PRINT_IF_GUID(g, ff_asf_header);
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else PRINT_IF_GUID(g, ff_asf_file_header);
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else PRINT_IF_GUID(g, ff_asf_stream_header);
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else PRINT_IF_GUID(g, ff_asf_audio_stream);
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else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
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else PRINT_IF_GUID(g, ff_asf_video_stream);
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else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
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else PRINT_IF_GUID(g, ff_asf_command_stream);
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else PRINT_IF_GUID(g, ff_asf_comment_header);
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else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
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else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
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else PRINT_IF_GUID(g, ff_asf_data_header);
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else PRINT_IF_GUID(g, index_guid);
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else PRINT_IF_GUID(g, ff_asf_head1_guid);
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else PRINT_IF_GUID(g, ff_asf_head2_guid);
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else PRINT_IF_GUID(g, ff_asf_my_guid);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
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else PRINT_IF_GUID(g, ff_asf_extended_content_header);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
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else PRINT_IF_GUID(g, ff_asf_metadata_header);
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else PRINT_IF_GUID(g, stream_bitrate_guid);
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else PRINT_IF_GUID(g, ff_asf_language_guid);
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else
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dprintf(NULL, "(GUID: unknown) ");
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for(i=0;i<16;i++)
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dprintf(NULL, " 0x%02x,", (*g)[i]);
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dprintf(NULL, "}\n");
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}
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#undef PRINT_IF_GUID
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#else
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#define print_guid(g)
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#endif
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static void get_guid(ByteIOContext *s, ff_asf_guid *g)
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{
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assert(sizeof(*g) == 16);
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get_buffer(s, *g, sizeof(*g));
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}
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#if 0
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static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
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{
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int len, c;
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char *q;
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len = get_le16(pb);
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q = buf;
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while (len > 0) {
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c = get_le16(pb);
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if ((q - buf) < buf_size - 1)
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*q++ = c;
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len--;
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}
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*q = '\0';
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}
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#endif
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static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
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{
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char* q = buf;
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for (; len > 1; len -= 2) {
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uint8_t tmp;
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PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
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}
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if (len > 0)
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url_fskip(pb, len);
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*q = '\0';
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}
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static int asf_probe(AVProbeData *pd)
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{
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/* check file header */
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if (!guidcmp(pd->buf, &ff_asf_header))
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return AVPROBE_SCORE_MAX;
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else
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return 0;
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}
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static int get_value(ByteIOContext *pb, int type){
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switch(type){
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case 2: return get_le32(pb);
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case 3: return get_le32(pb);
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case 4: return get_le64(pb);
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case 5: return get_le16(pb);
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default:return INT_MIN;
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}
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}
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static void get_tag(AVFormatContext *s, const char *key, int type, int len)
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{
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char value[1024];
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if (type <= 1) { // unicode or byte
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get_str16_nolen(s->pb, len, value, sizeof(value));
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} else if (type <= 5) { // boolean or DWORD or QWORD or WORD
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uint64_t num = get_value(s->pb, type);
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snprintf(value, sizeof(value), "%"PRIu64, num);
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} else {
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url_fskip(s->pb, len);
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return;
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}
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if (!strncmp(key, "WM/", 3))
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key += 3;
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av_metadata_set(&s->metadata, key, value);
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}
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static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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ASFContext *asf = s->priv_data;
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ff_asf_guid g;
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ByteIOContext *pb = s->pb;
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AVStream *st;
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ASFStream *asf_st;
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int size, i;
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int64_t gsize;
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AVRational dar[128];
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uint32_t bitrate[128];
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memset(dar, 0, sizeof(dar));
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memset(bitrate, 0, sizeof(bitrate));
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get_guid(pb, &g);
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if (guidcmp(&g, &ff_asf_header))
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return -1;
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get_le64(pb);
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get_le32(pb);
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get_byte(pb);
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get_byte(pb);
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memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
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for(;;) {
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get_guid(pb, &g);
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gsize = get_le64(pb);
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dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
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print_guid(&g);
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dprintf(s, " size=0x%"PRIx64"\n", gsize);
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if (!guidcmp(&g, &ff_asf_data_header)) {
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asf->data_object_offset = url_ftell(pb);
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// if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
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if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
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asf->data_object_size = gsize - 24;
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} else {
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asf->data_object_size = (uint64_t)-1;
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}
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break;
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}
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if (gsize < 24)
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return -1;
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if (!guidcmp(&g, &ff_asf_file_header)) {
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get_guid(pb, &asf->hdr.guid);
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asf->hdr.file_size = get_le64(pb);
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asf->hdr.create_time = get_le64(pb);
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asf->nb_packets = get_le64(pb);
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asf->hdr.play_time = get_le64(pb);
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asf->hdr.send_time = get_le64(pb);
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asf->hdr.preroll = get_le32(pb);
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asf->hdr.ignore = get_le32(pb);
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asf->hdr.flags = get_le32(pb);
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asf->hdr.min_pktsize = get_le32(pb);
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asf->hdr.max_pktsize = get_le32(pb);
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asf->hdr.max_bitrate = get_le32(pb);
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s->packet_size = asf->hdr.max_pktsize;
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} else if (!guidcmp(&g, &ff_asf_stream_header)) {
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enum CodecType type;
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int type_specific_size, sizeX;
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uint64_t total_size;
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unsigned int tag1;
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int64_t pos1, pos2, start_time;
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int test_for_ext_stream_audio, is_dvr_ms_audio=0;
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pos1 = url_ftell(pb);
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
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asf_st = av_mallocz(sizeof(ASFStream));
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if (!asf_st)
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return AVERROR(ENOMEM);
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st->priv_data = asf_st;
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start_time = asf->hdr.preroll;
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asf_st->stream_language_index = 128; // invalid stream index means no language info
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if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
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st->duration = asf->hdr.play_time /
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(10000000 / 1000) - start_time;
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}
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get_guid(pb, &g);
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test_for_ext_stream_audio = 0;
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if (!guidcmp(&g, &ff_asf_audio_stream)) {
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type = CODEC_TYPE_AUDIO;
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} else if (!guidcmp(&g, &ff_asf_video_stream)) {
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type = CODEC_TYPE_VIDEO;
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} else if (!guidcmp(&g, &ff_asf_command_stream)) {
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type = CODEC_TYPE_DATA;
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} else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
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test_for_ext_stream_audio = 1;
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type = CODEC_TYPE_UNKNOWN;
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} else {
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return -1;
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}
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get_guid(pb, &g);
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total_size = get_le64(pb);
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type_specific_size = get_le32(pb);
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get_le32(pb);
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st->id = get_le16(pb) & 0x7f; /* stream id */
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// mapping of asf ID to AV stream ID;
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asf->asfid2avid[st->id] = s->nb_streams - 1;
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get_le32(pb);
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if (test_for_ext_stream_audio) {
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get_guid(pb, &g);
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if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
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type = CODEC_TYPE_AUDIO;
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is_dvr_ms_audio=1;
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get_guid(pb, &g);
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get_le32(pb);
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get_le32(pb);
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get_le32(pb);
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get_guid(pb, &g);
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get_le32(pb);
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}
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}
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st->codec->codec_type = type;
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if (type == CODEC_TYPE_AUDIO) {
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ff_get_wav_header(pb, st->codec, type_specific_size);
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if (is_dvr_ms_audio) {
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// codec_id and codec_tag are unreliable in dvr_ms
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// files. Set them later by probing stream.
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st->codec->codec_id = CODEC_ID_PROBE;
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st->codec->codec_tag = 0;
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}
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if (st->codec->codec_id == CODEC_ID_AAC) {
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st->need_parsing = AVSTREAM_PARSE_NONE;
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} else {
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st->need_parsing = AVSTREAM_PARSE_FULL;
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}
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/* We have to init the frame size at some point .... */
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pos2 = url_ftell(pb);
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if (gsize >= (pos2 + 8 - pos1 + 24)) {
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asf_st->ds_span = get_byte(pb);
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asf_st->ds_packet_size = get_le16(pb);
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asf_st->ds_chunk_size = get_le16(pb);
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get_le16(pb); //ds_data_size
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get_byte(pb); //ds_silence_data
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}
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//printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
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// asf_st->ds_packet_size, asf_st->ds_chunk_size,
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// asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
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if (asf_st->ds_span > 1) {
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if (!asf_st->ds_chunk_size
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|| (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
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|| asf_st->ds_packet_size % asf_st->ds_chunk_size)
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asf_st->ds_span = 0; // disable descrambling
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}
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switch (st->codec->codec_id) {
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case CODEC_ID_MP3:
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st->codec->frame_size = MPA_FRAME_SIZE;
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break;
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case CODEC_ID_PCM_S16LE:
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case CODEC_ID_PCM_S16BE:
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case CODEC_ID_PCM_U16LE:
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case CODEC_ID_PCM_U16BE:
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case CODEC_ID_PCM_S8:
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_ALAW:
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case CODEC_ID_PCM_MULAW:
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st->codec->frame_size = 1;
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break;
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default:
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/* This is probably wrong, but it prevents a crash later */
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st->codec->frame_size = 1;
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break;
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}
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} else if (type == CODEC_TYPE_VIDEO) {
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get_le32(pb);
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get_le32(pb);
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get_byte(pb);
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size = get_le16(pb); /* size */
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sizeX= get_le32(pb); /* size */
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st->codec->width = get_le32(pb);
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st->codec->height = get_le32(pb);
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/* not available for asf */
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get_le16(pb); /* panes */
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st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
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tag1 = get_le32(pb);
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url_fskip(pb, 20);
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// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
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size= sizeX;
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if (size > 40) {
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st->codec->extradata_size = size - 40;
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st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
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}
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/* Extract palette from extradata if bpp <= 8 */
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/* This code assumes that extradata contains only palette */
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/* This is true for all paletted codecs implemented in ffmpeg */
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if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
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st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
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#if HAVE_BIGENDIAN
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for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
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st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
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#else
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memcpy(st->codec->palctrl->palette, st->codec->extradata,
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FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
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#endif
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st->codec->palctrl->palette_changed = 1;
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}
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st->codec->codec_tag = tag1;
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st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
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if(tag1 == MKTAG('D', 'V', 'R', ' '))
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st->need_parsing = AVSTREAM_PARSE_FULL;
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}
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pos2 = url_ftell(pb);
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url_fskip(pb, gsize - (pos2 - pos1 + 24));
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} else if (!guidcmp(&g, &ff_asf_comment_header)) {
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int len1, len2, len3, len4, len5;
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len1 = get_le16(pb);
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len2 = get_le16(pb);
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len3 = get_le16(pb);
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len4 = get_le16(pb);
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len5 = get_le16(pb);
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get_tag(s, "title" , 0, len1);
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get_tag(s, "author" , 0, len2);
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get_tag(s, "copyright", 0, len3);
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get_tag(s, "comment" , 0, len4);
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url_fskip(pb, len5);
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} else if (!guidcmp(&g, &stream_bitrate_guid)) {
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int stream_count = get_le16(pb);
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int j;
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// av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
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// av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
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for(j = 0; j < stream_count; j++) {
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int flags, bitrate, stream_id;
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flags= get_le16(pb);
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bitrate= get_le32(pb);
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stream_id= (flags & 0x7f);
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// av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
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asf->stream_bitrates[stream_id]= bitrate;
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}
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} else if (!guidcmp(&g, &ff_asf_language_guid)) {
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int j;
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int stream_count = get_le16(pb);
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for(j = 0; j < stream_count; j++) {
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char lang[6];
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unsigned int lang_len = get_byte(pb);
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get_str16_nolen(pb, lang_len, lang, sizeof(lang));
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if (j < 128)
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av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
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}
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} else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
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int desc_count, i;
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desc_count = get_le16(pb);
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for(i=0;i<desc_count;i++) {
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int name_len,value_type,value_len;
|
|
char name[1024];
|
|
|
|
name_len = get_le16(pb);
|
|
get_str16_nolen(pb, name_len, name, sizeof(name));
|
|
value_type = get_le16(pb);
|
|
value_len = get_le16(pb);
|
|
get_tag(s, name, value_type, value_len);
|
|
}
|
|
} else if (!guidcmp(&g, &ff_asf_metadata_header)) {
|
|
int n, stream_num, name_len, value_len, value_type, value_num;
|
|
n = get_le16(pb);
|
|
|
|
for(i=0;i<n;i++) {
|
|
char name[1024];
|
|
|
|
get_le16(pb); //lang_list_index
|
|
stream_num= get_le16(pb);
|
|
name_len= get_le16(pb);
|
|
value_type= get_le16(pb);
|
|
value_len= get_le32(pb);
|
|
|
|
get_str16_nolen(pb, name_len, name, sizeof(name));
|
|
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
|
|
value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
|
|
url_fskip(pb, value_len - 2);
|
|
|
|
if(stream_num<128){
|
|
if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
|
|
else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
|
|
}
|
|
}
|
|
} else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
|
|
int ext_len, payload_ext_ct, stream_ct;
|
|
uint32_t ext_d, leak_rate, stream_num;
|
|
unsigned int stream_languageid_index;
|
|
|
|
get_le64(pb); // starttime
|
|
get_le64(pb); // endtime
|
|
leak_rate = get_le32(pb); // leak-datarate
|
|
get_le32(pb); // bucket-datasize
|
|
get_le32(pb); // init-bucket-fullness
|
|
get_le32(pb); // alt-leak-datarate
|
|
get_le32(pb); // alt-bucket-datasize
|
|
get_le32(pb); // alt-init-bucket-fullness
|
|
get_le32(pb); // max-object-size
|
|
get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
|
|
stream_num = get_le16(pb); // stream-num
|
|
|
|
stream_languageid_index = get_le16(pb); // stream-language-id-index
|
|
if (stream_num < 128)
|
|
asf->streams[stream_num].stream_language_index = stream_languageid_index;
|
|
|
|
get_le64(pb); // avg frametime in 100ns units
|
|
stream_ct = get_le16(pb); //stream-name-count
|
|
payload_ext_ct = get_le16(pb); //payload-extension-system-count
|
|
|
|
if (stream_num < 128)
|
|
bitrate[stream_num] = leak_rate;
|
|
|
|
for (i=0; i<stream_ct; i++){
|
|
get_le16(pb);
|
|
ext_len = get_le16(pb);
|
|
url_fseek(pb, ext_len, SEEK_CUR);
|
|
}
|
|
|
|
for (i=0; i<payload_ext_ct; i++){
|
|
get_guid(pb, &g);
|
|
ext_d=get_le16(pb);
|
|
ext_len=get_le32(pb);
|
|
url_fseek(pb, ext_len, SEEK_CUR);
|
|
}
|
|
|
|
// there could be a optional stream properties object to follow
|
|
// if so the next iteration will pick it up
|
|
} else if (!guidcmp(&g, &ff_asf_head1_guid)) {
|
|
int v1, v2;
|
|
get_guid(pb, &g);
|
|
v1 = get_le32(pb);
|
|
v2 = get_le16(pb);
|
|
#if 0
|
|
} else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
|
|
int len, v1, n, num;
|
|
char str[256], *q;
|
|
char tag[16];
|
|
|
|
get_guid(pb, &g);
|
|
print_guid(&g);
|
|
|
|
n = get_le32(pb);
|
|
for(i=0;i<n;i++) {
|
|
num = get_le16(pb); /* stream number */
|
|
get_str16(pb, str, sizeof(str));
|
|
get_str16(pb, str, sizeof(str));
|
|
len = get_le16(pb);
|
|
q = tag;
|
|
while (len > 0) {
|
|
v1 = get_byte(pb);
|
|
if ((q - tag) < sizeof(tag) - 1)
|
|
*q++ = v1;
|
|
len--;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
#endif
|
|
} else if (url_feof(pb)) {
|
|
return -1;
|
|
} else {
|
|
if (!s->keylen) {
|
|
if (!guidcmp(&g, &ff_asf_content_encryption)) {
|
|
av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
|
|
} else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
|
|
av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
|
|
} else if (!guidcmp(&g, &ff_asf_digital_signature)) {
|
|
av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
|
|
}
|
|
}
|
|
url_fseek(pb, gsize - 24, SEEK_CUR);
|
|
}
|
|
}
|
|
get_guid(pb, &g);
|
|
get_le64(pb);
|
|
get_byte(pb);
|
|
get_byte(pb);
|
|
if (url_feof(pb))
|
|
return -1;
|
|
asf->data_offset = url_ftell(pb);
|
|
asf->packet_size_left = 0;
|
|
|
|
|
|
for(i=0; i<128; i++){
|
|
int stream_num= asf->asfid2avid[i];
|
|
if(stream_num>=0){
|
|
AVStream *st = s->streams[stream_num];
|
|
if (!st->codec->bit_rate)
|
|
st->codec->bit_rate = bitrate[i];
|
|
if (dar[i].num > 0 && dar[i].den > 0)
|
|
av_reduce(&st->sample_aspect_ratio.num,
|
|
&st->sample_aspect_ratio.den,
|
|
dar[i].num, dar[i].den, INT_MAX);
|
|
//av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
|
|
|
|
// copy and convert language codes to the frontend
|
|
if (asf->streams[i].stream_language_index < 128) {
|
|
const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
|
|
if (rfc1766 && strlen(rfc1766) > 1) {
|
|
const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
|
|
const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
|
|
if (iso6392)
|
|
av_metadata_set(&st->metadata, "language", iso6392);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define DO_2BITS(bits, var, defval) \
|
|
switch (bits & 3) \
|
|
{ \
|
|
case 3: var = get_le32(pb); rsize += 4; break; \
|
|
case 2: var = get_le16(pb); rsize += 2; break; \
|
|
case 1: var = get_byte(pb); rsize++; break; \
|
|
default: var = defval; break; \
|
|
}
|
|
|
|
/**
|
|
* Load a single ASF packet into the demuxer.
|
|
* @param s demux context
|
|
* @param pb context to read data from
|
|
* @returns 0 on success, <0 on error
|
|
*/
|
|
static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
uint32_t packet_length, padsize;
|
|
int rsize = 8;
|
|
int c, d, e, off;
|
|
|
|
// if we do not know packet size, allow skipping up to 32 kB
|
|
off= 32768;
|
|
if (s->packet_size > 0)
|
|
off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
|
|
|
|
c=d=e=-1;
|
|
while(off-- > 0){
|
|
c=d; d=e;
|
|
e= get_byte(pb);
|
|
if(c == 0x82 && !d && !e)
|
|
break;
|
|
}
|
|
|
|
if (c != 0x82) {
|
|
/**
|
|
* This code allows handling of -EAGAIN at packet boundaries (i.e.
|
|
* if the packet sync code above triggers -EAGAIN). This does not
|
|
* imply complete -EAGAIN handling support at random positions in
|
|
* the stream.
|
|
*/
|
|
if (url_ferror(pb) == AVERROR(EAGAIN))
|
|
return AVERROR(EAGAIN);
|
|
if (!url_feof(pb))
|
|
av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
|
|
}
|
|
if ((c & 0x8f) == 0x82) {
|
|
if (d || e) {
|
|
if (!url_feof(pb))
|
|
av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
|
|
return -1;
|
|
}
|
|
c= get_byte(pb);
|
|
d= get_byte(pb);
|
|
rsize+=3;
|
|
}else{
|
|
url_fseek(pb, -1, SEEK_CUR); //FIXME
|
|
}
|
|
|
|
asf->packet_flags = c;
|
|
asf->packet_property = d;
|
|
|
|
DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
|
|
DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
|
|
DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
|
|
|
|
//the following checks prevent overflows and infinite loops
|
|
if(!packet_length || packet_length >= (1U<<29)){
|
|
av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
|
|
return -1;
|
|
}
|
|
if(padsize >= packet_length){
|
|
av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
|
|
return -1;
|
|
}
|
|
|
|
asf->packet_timestamp = get_le32(pb);
|
|
get_le16(pb); /* duration */
|
|
// rsize has at least 11 bytes which have to be present
|
|
|
|
if (asf->packet_flags & 0x01) {
|
|
asf->packet_segsizetype = get_byte(pb); rsize++;
|
|
asf->packet_segments = asf->packet_segsizetype & 0x3f;
|
|
} else {
|
|
asf->packet_segments = 1;
|
|
asf->packet_segsizetype = 0x80;
|
|
}
|
|
asf->packet_size_left = packet_length - padsize - rsize;
|
|
if (packet_length < asf->hdr.min_pktsize)
|
|
padsize += asf->hdr.min_pktsize - packet_length;
|
|
asf->packet_padsize = padsize;
|
|
dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @return <0 if error
|
|
*/
|
|
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
|
|
ASFContext *asf = s->priv_data;
|
|
int rsize = 1;
|
|
int num = get_byte(pb);
|
|
int64_t ts0, ts1;
|
|
|
|
asf->packet_segments--;
|
|
asf->packet_key_frame = num >> 7;
|
|
asf->stream_index = asf->asfid2avid[num & 0x7f];
|
|
// sequence should be ignored!
|
|
DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
|
|
DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
|
|
DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
|
|
//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
|
|
if (asf->packet_replic_size >= 8) {
|
|
asf->packet_obj_size = get_le32(pb);
|
|
if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
|
|
av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
|
|
return -1;
|
|
}
|
|
asf->packet_frag_timestamp = get_le32(pb); // timestamp
|
|
if(asf->packet_replic_size >= 8+38+4){
|
|
// for(i=0; i<asf->packet_replic_size-8; i++)
|
|
// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
|
|
// av_log(s, AV_LOG_DEBUG, "\n");
|
|
url_fskip(pb, 10);
|
|
ts0= get_le64(pb);
|
|
ts1= get_le64(pb);
|
|
url_fskip(pb, 12);
|
|
get_le32(pb);
|
|
url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
|
|
if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
|
|
else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
|
|
}else
|
|
url_fskip(pb, asf->packet_replic_size - 8);
|
|
rsize += asf->packet_replic_size; // FIXME - check validity
|
|
} else if (asf->packet_replic_size==1){
|
|
// multipacket - frag_offset is beginning timestamp
|
|
asf->packet_time_start = asf->packet_frag_offset;
|
|
asf->packet_frag_offset = 0;
|
|
asf->packet_frag_timestamp = asf->packet_timestamp;
|
|
|
|
asf->packet_time_delta = get_byte(pb);
|
|
rsize++;
|
|
}else if(asf->packet_replic_size!=0){
|
|
av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
|
|
return -1;
|
|
}
|
|
if (asf->packet_flags & 0x01) {
|
|
DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
|
|
if(asf->packet_frag_size > asf->packet_size_left - rsize){
|
|
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
|
|
return -1;
|
|
}
|
|
//printf("Fragsize %d\n", asf->packet_frag_size);
|
|
} else {
|
|
asf->packet_frag_size = asf->packet_size_left - rsize;
|
|
//printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
|
|
}
|
|
if (asf->packet_replic_size == 1) {
|
|
asf->packet_multi_size = asf->packet_frag_size;
|
|
if (asf->packet_multi_size > asf->packet_size_left)
|
|
return -1;
|
|
}
|
|
asf->packet_size_left -= rsize;
|
|
//printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Parse data from individual ASF packets (which were previously loaded
|
|
* with asf_get_packet()).
|
|
* @param s demux context
|
|
* @param pb context to read data from
|
|
* @param pkt pointer to store packet data into
|
|
* @returns 0 if data was stored in pkt, <0 on error or 1 if more ASF
|
|
* packets need to be loaded (through asf_get_packet())
|
|
*/
|
|
static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st = 0;
|
|
for (;;) {
|
|
if(url_feof(pb))
|
|
return AVERROR_EOF;
|
|
if (asf->packet_size_left < FRAME_HEADER_SIZE
|
|
|| asf->packet_segments < 1) {
|
|
//asf->packet_size_left <= asf->packet_padsize) {
|
|
int ret = asf->packet_size_left + asf->packet_padsize;
|
|
//printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
|
|
assert(ret>=0);
|
|
/* fail safe */
|
|
url_fskip(pb, ret);
|
|
|
|
asf->packet_pos= url_ftell(pb);
|
|
if (asf->data_object_size != (uint64_t)-1 &&
|
|
(asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
|
|
return AVERROR_EOF; /* Do not exceed the size of the data object */
|
|
return 1;
|
|
}
|
|
if (asf->packet_time_start == 0) {
|
|
if(asf_read_frame_header(s, pb) < 0){
|
|
asf->packet_segments= 0;
|
|
continue;
|
|
}
|
|
if (asf->stream_index < 0
|
|
|| s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
|
|
|| (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
|
|
) {
|
|
asf->packet_time_start = 0;
|
|
/* unhandled packet (should not happen) */
|
|
url_fskip(pb, asf->packet_frag_size);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
if(asf->stream_index < 0)
|
|
av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
|
|
continue;
|
|
}
|
|
asf->asf_st = s->streams[asf->stream_index]->priv_data;
|
|
}
|
|
asf_st = asf->asf_st;
|
|
|
|
if (asf->packet_replic_size == 1) {
|
|
// frag_offset is here used as the beginning timestamp
|
|
asf->packet_frag_timestamp = asf->packet_time_start;
|
|
asf->packet_time_start += asf->packet_time_delta;
|
|
asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
|
|
asf->packet_size_left--;
|
|
asf->packet_multi_size--;
|
|
if (asf->packet_multi_size < asf->packet_obj_size)
|
|
{
|
|
asf->packet_time_start = 0;
|
|
url_fskip(pb, asf->packet_multi_size);
|
|
asf->packet_size_left -= asf->packet_multi_size;
|
|
continue;
|
|
}
|
|
asf->packet_multi_size -= asf->packet_obj_size;
|
|
//printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
|
|
}
|
|
if( /*asf->packet_frag_size == asf->packet_obj_size*/
|
|
asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
|
|
&& asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
|
|
av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
|
|
asf_st->frag_offset, asf->packet_frag_size,
|
|
asf->packet_obj_size, asf_st->pkt.size);
|
|
asf->packet_obj_size= asf_st->pkt.size;
|
|
}
|
|
|
|
if ( asf_st->pkt.size != asf->packet_obj_size
|
|
|| asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
|
|
if(asf_st->pkt.data){
|
|
av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
|
|
asf_st->frag_offset = 0;
|
|
av_free_packet(&asf_st->pkt);
|
|
}
|
|
/* new packet */
|
|
av_new_packet(&asf_st->pkt, asf->packet_obj_size);
|
|
asf_st->seq = asf->packet_seq;
|
|
asf_st->pkt.dts = asf->packet_frag_timestamp;
|
|
asf_st->pkt.stream_index = asf->stream_index;
|
|
asf_st->pkt.pos =
|
|
asf_st->packet_pos= asf->packet_pos;
|
|
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
|
|
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
|
|
//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
|
|
if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
|
|
asf->packet_key_frame = 1;
|
|
if (asf->packet_key_frame)
|
|
asf_st->pkt.flags |= PKT_FLAG_KEY;
|
|
}
|
|
|
|
/* read data */
|
|
//printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
|
|
// s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
|
|
// asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
if (asf->packet_size_left < 0)
|
|
continue;
|
|
|
|
if( asf->packet_frag_offset >= asf_st->pkt.size
|
|
|| asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
|
|
av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
|
|
asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
|
|
continue;
|
|
}
|
|
|
|
get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
|
|
asf->packet_frag_size);
|
|
if (s->key && s->keylen == 20)
|
|
ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
|
|
asf->packet_frag_size);
|
|
asf_st->frag_offset += asf->packet_frag_size;
|
|
/* test if whole packet is read */
|
|
if (asf_st->frag_offset == asf_st->pkt.size) {
|
|
//workaround for macroshit radio DVR-MS files
|
|
if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
|
|
&& asf_st->pkt.size > 100){
|
|
int i;
|
|
for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
|
|
if(i == asf_st->pkt.size){
|
|
av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
|
|
asf_st->frag_offset = 0;
|
|
av_free_packet(&asf_st->pkt);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* return packet */
|
|
if (asf_st->ds_span > 1) {
|
|
if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
|
|
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);
|
|
}else{
|
|
/* packet descrambling */
|
|
uint8_t *newdata = av_malloc(asf_st->pkt.size);
|
|
if (newdata) {
|
|
int offset = 0;
|
|
while (offset < asf_st->pkt.size) {
|
|
int off = offset / asf_st->ds_chunk_size;
|
|
int row = off / asf_st->ds_span;
|
|
int col = off % asf_st->ds_span;
|
|
int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
|
|
//printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
|
|
|
|
assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
|
|
assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
|
|
memcpy(newdata + offset,
|
|
asf_st->pkt.data + idx * asf_st->ds_chunk_size,
|
|
asf_st->ds_chunk_size);
|
|
offset += asf_st->ds_chunk_size;
|
|
}
|
|
av_free(asf_st->pkt.data);
|
|
asf_st->pkt.data = newdata;
|
|
}
|
|
}
|
|
}
|
|
asf_st->frag_offset = 0;
|
|
*pkt= asf_st->pkt;
|
|
//printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
|
|
asf_st->pkt.size = 0;
|
|
asf_st->pkt.data = 0;
|
|
break; // packet completed
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
|
|
for (;;) {
|
|
int ret;
|
|
|
|
/* parse cached packets, if any */
|
|
if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
|
|
return ret;
|
|
if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
|
|
assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
|
|
asf->packet_time_start = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Added to support seeking after packets have been read
|
|
// If information is not reset, read_packet fails due to
|
|
// leftover information from previous reads
|
|
static void asf_reset_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st;
|
|
int i;
|
|
|
|
asf->packet_nb_frames = 0;
|
|
asf->packet_size_left = 0;
|
|
asf->packet_segments = 0;
|
|
asf->packet_flags = 0;
|
|
asf->packet_property = 0;
|
|
asf->packet_timestamp = 0;
|
|
asf->packet_segsizetype = 0;
|
|
asf->packet_segments = 0;
|
|
asf->packet_seq = 0;
|
|
asf->packet_replic_size = 0;
|
|
asf->packet_key_frame = 0;
|
|
asf->packet_padsize = 0;
|
|
asf->packet_frag_offset = 0;
|
|
asf->packet_frag_size = 0;
|
|
asf->packet_frag_timestamp = 0;
|
|
asf->packet_multi_size = 0;
|
|
asf->packet_obj_size = 0;
|
|
asf->packet_time_delta = 0;
|
|
asf->packet_time_start = 0;
|
|
|
|
for(i=0; i<s->nb_streams; i++){
|
|
asf_st= s->streams[i]->priv_data;
|
|
av_free_packet(&asf_st->pkt);
|
|
asf_st->frag_offset=0;
|
|
asf_st->seq=0;
|
|
}
|
|
asf->asf_st= NULL;
|
|
}
|
|
|
|
static int asf_read_close(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
|
|
asf_reset_header(s);
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
AVStream *st = s->streams[i];
|
|
av_free(st->codec->palctrl);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
|
|
{
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
ASFStream *asf_st;
|
|
int64_t pts;
|
|
int64_t pos= *ppos;
|
|
int i;
|
|
int64_t start_pos[s->nb_streams];
|
|
|
|
for(i=0; i<s->nb_streams; i++){
|
|
start_pos[i]= pos;
|
|
}
|
|
|
|
if (s->packet_size > 0)
|
|
pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
|
|
*ppos= pos;
|
|
url_fseek(s->pb, pos, SEEK_SET);
|
|
|
|
//printf("asf_read_pts\n");
|
|
asf_reset_header(s);
|
|
for(;;){
|
|
if (av_read_frame(s, pkt) < 0){
|
|
av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
|
|
return AV_NOPTS_VALUE;
|
|
}
|
|
|
|
pts= pkt->pts;
|
|
|
|
av_free_packet(pkt);
|
|
if(pkt->flags&PKT_FLAG_KEY){
|
|
i= pkt->stream_index;
|
|
|
|
asf_st= s->streams[i]->priv_data;
|
|
|
|
// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
|
|
pos= asf_st->packet_pos;
|
|
|
|
av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
|
|
start_pos[i]= asf_st->packet_pos + 1;
|
|
|
|
if(pkt->stream_index == stream_index)
|
|
break;
|
|
}
|
|
}
|
|
|
|
*ppos= pos;
|
|
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
|
|
|
|
return pts;
|
|
}
|
|
|
|
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
|
|
{
|
|
ff_asf_guid g;
|
|
ASFContext *asf = s->priv_data;
|
|
int64_t current_pos= url_ftell(s->pb);
|
|
int i;
|
|
|
|
url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
|
|
get_guid(s->pb, &g);
|
|
if (!guidcmp(&g, &index_guid)) {
|
|
int64_t itime;
|
|
int pct, ict;
|
|
int64_t av_unused gsize= get_le64(s->pb);
|
|
get_guid(s->pb, &g);
|
|
itime=get_le64(s->pb);
|
|
pct=get_le32(s->pb);
|
|
ict=get_le32(s->pb);
|
|
av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
|
|
|
|
for (i=0;i<ict;i++){
|
|
int pktnum=get_le32(s->pb);
|
|
int pktct =get_le16(s->pb);
|
|
int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
|
|
int64_t index_pts= av_rescale(itime, i, 10000);
|
|
|
|
av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
|
|
av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
asf->index_read= 1;
|
|
}
|
|
url_fseek(s->pb, current_pos, SEEK_SET);
|
|
}
|
|
|
|
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVStream *st = s->streams[stream_index];
|
|
int64_t pos;
|
|
int index;
|
|
|
|
if (s->packet_size <= 0)
|
|
return -1;
|
|
|
|
/* Try using the protocol's read_seek if available */
|
|
if(s->pb) {
|
|
int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
|
|
if(ret >= 0)
|
|
asf_reset_header(s);
|
|
if (ret != AVERROR(ENOSYS))
|
|
return ret;
|
|
}
|
|
|
|
if (!asf->index_read)
|
|
asf_build_simple_index(s, stream_index);
|
|
|
|
if(!(asf->index_read && st->index_entries)){
|
|
if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
|
|
return -1;
|
|
}else{
|
|
index= av_index_search_timestamp(st, pts, flags);
|
|
if(index<0)
|
|
return -1;
|
|
|
|
/* find the position */
|
|
pos = st->index_entries[index].pos;
|
|
|
|
// various attempts to find key frame have failed so far
|
|
// asf_reset_header(s);
|
|
// url_fseek(s->pb, pos, SEEK_SET);
|
|
// key_pos = pos;
|
|
// for(i=0;i<16;i++){
|
|
// pos = url_ftell(s->pb);
|
|
// if (av_read_frame(s, &pkt) < 0){
|
|
// av_log(s, AV_LOG_INFO, "seek failed\n");
|
|
// return -1;
|
|
// }
|
|
// asf_st = s->streams[stream_index]->priv_data;
|
|
// pos += st->parser->frame_offset;
|
|
//
|
|
// if (pkt.size > b) {
|
|
// b = pkt.size;
|
|
// key_pos = pos;
|
|
// }
|
|
//
|
|
// av_free_packet(&pkt);
|
|
// }
|
|
|
|
/* do the seek */
|
|
av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
|
|
url_fseek(s->pb, pos, SEEK_SET);
|
|
}
|
|
asf_reset_header(s);
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat asf_demuxer = {
|
|
"asf",
|
|
NULL_IF_CONFIG_SMALL("ASF format"),
|
|
sizeof(ASFContext),
|
|
asf_probe,
|
|
asf_read_header,
|
|
asf_read_packet,
|
|
asf_read_close,
|
|
asf_read_seek,
|
|
asf_read_pts,
|
|
.metadata_conv = ff_asf_metadata_conv,
|
|
};
|