rename asf-enc.c to asfenc.c and asf.c to asfdec.c for consistency

Originally committed as revision 17618 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 1090 insertions, 0 deletions

diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
new file mode 100644
index 0000000000..bcaf2a1c16
--- /dev/null
+++ b/libavformat/asfdec.c
@@ -0,0 +1,1090 @@
+/*
+ * ASF compatible demuxer
+ * Copyright (c) 2000, 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/common.h"
+#include "libavcodec/mpegaudio.h"
+#include "avformat.h"
+#include "riff.h"
+#include "asf.h"
+#include "asfcrypt.h"
+
+void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
+
+#undef NDEBUG
+#include <assert.h>
+
+#define FRAME_HEADER_SIZE 17
+// Fix Me! FRAME_HEADER_SIZE may be different.
+
+static const GUID index_guid = {
+    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
+};
+
+static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
+    0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
+};
+/**********************************/
+/* decoding */
+
+//#define DEBUG
+
+#ifdef DEBUG
+#define PRINT_IF_GUID(g,cmp) \
+if (!memcmp(g, &cmp, sizeof(GUID))) \
+    dprintf(NULL, "(GUID: %s) ", #cmp)
+
+static void print_guid(const GUID *g)
+{
+    int i;
+    PRINT_IF_GUID(g, asf_header);
+    else PRINT_IF_GUID(g, file_header);
+    else PRINT_IF_GUID(g, stream_header);
+    else PRINT_IF_GUID(g, audio_stream);
+    else PRINT_IF_GUID(g, audio_conceal_none);
+    else PRINT_IF_GUID(g, video_stream);
+    else PRINT_IF_GUID(g, video_conceal_none);
+    else PRINT_IF_GUID(g, command_stream);
+    else PRINT_IF_GUID(g, comment_header);
+    else PRINT_IF_GUID(g, codec_comment_header);
+    else PRINT_IF_GUID(g, codec_comment1_header);
+    else PRINT_IF_GUID(g, data_header);
+    else PRINT_IF_GUID(g, index_guid);
+    else PRINT_IF_GUID(g, head1_guid);
+    else PRINT_IF_GUID(g, head2_guid);
+    else PRINT_IF_GUID(g, my_guid);
+    else PRINT_IF_GUID(g, ext_stream_header);
+    else PRINT_IF_GUID(g, extended_content_header);
+    else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
+    else PRINT_IF_GUID(g, ext_stream_audio_stream);
+    else PRINT_IF_GUID(g, metadata_header);
+    else PRINT_IF_GUID(g, stream_bitrate_guid);
+    else
+        dprintf(NULL, "(GUID: unknown) ");
+    for(i=0;i<16;i++)
+        dprintf(NULL, " 0x%02x,", (*g)[i]);
+    dprintf(NULL, "}\n");
+}
+#undef PRINT_IF_GUID
+#else
+#define print_guid(g)
+#endif
+
+static void get_guid(ByteIOContext *s, GUID *g)
+{
+    assert(sizeof(*g) == 16);
+    get_buffer(s, *g, sizeof(*g));
+}
+
+#if 0
+static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
+{
+    int len, c;
+    char *q;
+
+    len = get_le16(pb);
+    q = buf;
+    while (len > 0) {
+        c = get_le16(pb);
+        if ((q - buf) < buf_size - 1)
+            *q++ = c;
+        len--;
+    }
+    *q = '\0';
+}
+#endif
+
+static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
+{
+    char* q = buf;
+    len /= 2;
+    while (len--) {
+        uint8_t tmp;
+        PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
+    }
+    *q = '\0';
+}
+
+static int asf_probe(AVProbeData *pd)
+{
+    /* check file header */
+    if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int get_value(ByteIOContext *pb, int type){
+    switch(type){
+        case 2: return get_le32(pb);
+        case 3: return get_le32(pb);
+        case 4: return get_le64(pb);
+        case 5: return get_le16(pb);
+        default:return INT_MIN;
+    }
+}
+
+static void get_tag(AVFormatContext *s, const char *key, int type, int len)
+{
+    char value[1024];
+    if (type <= 1) {         // unicode or byte
+        get_str16_nolen(s->pb, len, value, sizeof(value));
+    } else if (type <= 5) {  // boolean or DWORD or QWORD or WORD
+        uint64_t num = get_value(s->pb, type);
+        snprintf(value, sizeof(value), "%"PRIu64, num);
+    } else {
+        url_fskip(s->pb, len);
+        return;
+    }
+    if (strncmp(key, "WM/", 3))
+        key += 3;
+    av_metadata_set(&s->metadata, key, value);
+}
+
+static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    ASFContext *asf = s->priv_data;
+    GUID g;
+    ByteIOContext *pb = s->pb;
+    AVStream *st;
+    ASFStream *asf_st;
+    int size, i;
+    int64_t gsize;
+    AVRational dar[128];
+    uint32_t bitrate[128];
+
+    memset(dar, 0, sizeof(dar));
+    memset(bitrate, 0, sizeof(bitrate));
+
+    get_guid(pb, &g);
+    if (memcmp(&g, &asf_header, sizeof(GUID)))
+        return -1;
+    get_le64(pb);
+    get_le32(pb);
+    get_byte(pb);
+    get_byte(pb);
+    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
+    for(;;) {
+        get_guid(pb, &g);
+        gsize = get_le64(pb);
+        dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
+        print_guid(&g);
+        dprintf(s, "  size=0x%"PRIx64"\n", gsize);
+        if (!memcmp(&g, &data_header, sizeof(GUID))) {
+            asf->data_object_offset = url_ftell(pb);
+            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
+            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
+                asf->data_object_size = gsize - 24;
+            } else {
+                asf->data_object_size = (uint64_t)-1;
+            }
+            break;
+        }
+        if (gsize < 24)
+            return -1;
+        if (!memcmp(&g, &file_header, sizeof(GUID))) {
+            get_guid(pb, &asf->hdr.guid);
+            asf->hdr.file_size          = get_le64(pb);
+            asf->hdr.create_time        = get_le64(pb);
+            asf->nb_packets             = get_le64(pb);
+            asf->hdr.play_time          = get_le64(pb);
+            asf->hdr.send_time          = get_le64(pb);
+            asf->hdr.preroll            = get_le32(pb);
+            asf->hdr.ignore             = get_le32(pb);
+            asf->hdr.flags              = get_le32(pb);
+            asf->hdr.min_pktsize        = get_le32(pb);
+            asf->hdr.max_pktsize        = get_le32(pb);
+            asf->hdr.max_bitrate        = get_le32(pb);
+            asf->packet_size = asf->hdr.max_pktsize;
+        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
+            enum CodecType type;
+            int type_specific_size, sizeX;
+            uint64_t total_size;
+            unsigned int tag1;
+            int64_t pos1, pos2, start_time;
+            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
+
+            pos1 = url_ftell(pb);
+
+            st = av_new_stream(s, 0);
+            if (!st)
+                return AVERROR(ENOMEM);
+            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
+            asf_st = av_mallocz(sizeof(ASFStream));
+            if (!asf_st)
+                return AVERROR(ENOMEM);
+            st->priv_data = asf_st;
+            start_time = asf->hdr.preroll;
+
+            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
+                st->duration = asf->hdr.send_time /
+                    (10000000 / 1000) - start_time;
+            }
+            get_guid(pb, &g);
+
+            test_for_ext_stream_audio = 0;
+            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
+                type = CODEC_TYPE_AUDIO;
+            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
+                type = CODEC_TYPE_VIDEO;
+            } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
+                type = CODEC_TYPE_DATA;
+            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
+                test_for_ext_stream_audio = 1;
+                type = CODEC_TYPE_UNKNOWN;
+            } else {
+                return -1;
+            }
+            get_guid(pb, &g);
+            total_size = get_le64(pb);
+            type_specific_size = get_le32(pb);
+            get_le32(pb);
+            st->id = get_le16(pb) & 0x7f; /* stream id */
+            // mapping of asf ID to AV stream ID;
+            asf->asfid2avid[st->id] = s->nb_streams - 1;
+
+            get_le32(pb);
+
+            if (test_for_ext_stream_audio) {
+                get_guid(pb, &g);
+                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
+                    type = CODEC_TYPE_AUDIO;
+                    is_dvr_ms_audio=1;
+                    get_guid(pb, &g);
+                    get_le32(pb);
+                    get_le32(pb);
+                    get_le32(pb);
+                    get_guid(pb, &g);
+                    get_le32(pb);
+                }
+            }
+
+            st->codec->codec_type = type;
+            if (type == CODEC_TYPE_AUDIO) {
+                get_wav_header(pb, st->codec, type_specific_size);
+                if (is_dvr_ms_audio) {
+                    // codec_id and codec_tag are unreliable in dvr_ms
+                    // files. Set them later by probing stream.
+                    st->codec->codec_id = CODEC_ID_PROBE;
+                    st->codec->codec_tag = 0;
+                }
+                if (st->codec->codec_id == CODEC_ID_AAC) {
+                    st->need_parsing = AVSTREAM_PARSE_NONE;
+                } else {
+                    st->need_parsing = AVSTREAM_PARSE_FULL;
+                }
+                /* We have to init the frame size at some point .... */
+                pos2 = url_ftell(pb);
+                if (gsize >= (pos2 + 8 - pos1 + 24)) {
+                    asf_st->ds_span = get_byte(pb);
+                    asf_st->ds_packet_size = get_le16(pb);
+                    asf_st->ds_chunk_size = get_le16(pb);
+                    get_le16(pb); //ds_data_size
+                    get_byte(pb); //ds_silence_data
+                }
+                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
+                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
+                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
+                if (asf_st->ds_span > 1) {
+                    if (!asf_st->ds_chunk_size
+                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
+                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
+                        asf_st->ds_span = 0; // disable descrambling
+                }
+                switch (st->codec->codec_id) {
+                case CODEC_ID_MP3:
+                    st->codec->frame_size = MPA_FRAME_SIZE;
+                    break;
+                case CODEC_ID_PCM_S16LE:
+                case CODEC_ID_PCM_S16BE:
+                case CODEC_ID_PCM_U16LE:
+                case CODEC_ID_PCM_U16BE:
+                case CODEC_ID_PCM_S8:
+                case CODEC_ID_PCM_U8:
+                case CODEC_ID_PCM_ALAW:
+                case CODEC_ID_PCM_MULAW:
+                    st->codec->frame_size = 1;
+                    break;
+                default:
+                    /* This is probably wrong, but it prevents a crash later */
+                    st->codec->frame_size = 1;
+                    break;
+                }
+            } else if (type == CODEC_TYPE_VIDEO) {
+                get_le32(pb);
+                get_le32(pb);
+                get_byte(pb);
+                size = get_le16(pb); /* size */
+                sizeX= get_le32(pb); /* size */
+                st->codec->width = get_le32(pb);
+                st->codec->height = get_le32(pb);
+                /* not available for asf */
+                get_le16(pb); /* panes */
+                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
+                tag1 = get_le32(pb);
+                url_fskip(pb, 20);
+//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
+                size= sizeX;
+                if (size > 40) {
+                    st->codec->extradata_size = size - 40;
+                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
+                }
+
+        /* Extract palette from extradata if bpp <= 8 */
+        /* This code assumes that extradata contains only palette */
+        /* This is true for all paletted codecs implemented in ffmpeg */
+        if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
+            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
+#ifdef WORDS_BIGENDIAN
+            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
+                st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
+#else
+            memcpy(st->codec->palctrl->palette, st->codec->extradata,
+                   FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
+#endif
+            st->codec->palctrl->palette_changed = 1;
+        }
+
+                st->codec->codec_tag = tag1;
+                st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
+                if(tag1 == MKTAG('D', 'V', 'R', ' '))
+                    st->need_parsing = AVSTREAM_PARSE_FULL;
+            }
+            pos2 = url_ftell(pb);
+            url_fskip(pb, gsize - (pos2 - pos1 + 24));
+        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
+            int len1, len2, len3, len4, len5;
+
+            len1 = get_le16(pb);
+            len2 = get_le16(pb);
+            len3 = get_le16(pb);
+            len4 = get_le16(pb);
+            len5 = get_le16(pb);
+            get_tag(s, "title"    , 0, len1);
+            get_tag(s, "author"   , 0, len2);
+            get_tag(s, "copyright", 0, len3);
+            get_tag(s, "comment"  , 0, len4);
+            url_fskip(pb, len5);
+        } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
+            int stream_count = get_le16(pb);
+            int j;
+
+//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
+//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
+            for(j = 0; j < stream_count; j++) {
+                int flags, bitrate, stream_id;
+
+                flags= get_le16(pb);
+                bitrate= get_le32(pb);
+                stream_id= (flags & 0x7f);
+//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
+                asf->stream_bitrates[stream_id]= bitrate;
+            }
+       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
+                int desc_count, i;
+
+                desc_count = get_le16(pb);
+                for(i=0;i<desc_count;i++)
+                {
+                        int name_len,value_type,value_len;
+                        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 (!memcmp(&g, &metadata_header, sizeof(GUID))) {
+            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 (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
+            int ext_len, payload_ext_ct, stream_ct;
+            uint32_t ext_d, leak_rate, stream_num;
+            int64_t pos_ex_st;
+            pos_ex_st = url_ftell(pb);
+
+            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
+            get_le16(pb); // stream-language-id-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 (!memcmp(&g, &head1_guid, sizeof(GUID))) {
+            int v1, v2;
+            get_guid(pb, &g);
+            v1 = get_le32(pb);
+            v2 = get_le16(pb);
+#if 0
+        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
+            int len, v1, n, num;
+            char str[256], *q;
+            char tag[16];
+
+            get_guid(pb, &g);
+            print_guid(&g);
+
+            n = get_le32(pb);
+            for(i=0;i<n;i++) {
+                num = get_le16(pb); /* stream number */
+                get_str16(pb, str, sizeof(str));
+                get_str16(pb, str, sizeof(str));
+                len = get_le16(pb);
+                q = tag;
+                while (len > 0) {
+                    v1 = get_byte(pb);
+                    if ((q - tag) < sizeof(tag) - 1)
+                        *q++ = v1;
+                    len--;
+                }
+                *q = '\0';
+            }
+#endif
+        } else if (url_feof(pb)) {
+            return -1;
+        } else {
+            url_fseek(pb, gsize - 24, SEEK_CUR);
+        }
+    }
+    get_guid(pb, &g);
+    get_le64(pb);
+    get_byte(pb);
+    get_byte(pb);
+    if (url_feof(pb))
+        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);
+        }
+    }
+
+    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; \
+    }
+
+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;
+
+    off= (url_ftell(pb) - s->data_offset) % asf->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) {
+        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, asf->packet_size);
+    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
+    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
+
+    //the following checks prevent overflows and infinite loops
+    if(packet_length >= (1U<<29)){
+        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
+        return -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", asf->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;
+}
+
+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(EIO);
+        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(EIO); /* 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",
+        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
+        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
+        asf->packet_size_left -= asf->packet_frag_size;
+        if (asf->packet_size_left < 0)
+            continue;
+
+        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)
+{
+    ASFContext *asf = s->priv_data;
+    AVPacket pkt1, *pkt = &pkt1;
+    ASFStream *asf_st;
+    int64_t pts;
+    int64_t pos= *ppos;
+    int i;
+    int64_t start_pos[s->nb_streams];
+
+    for(i=0; i<s->nb_streams; i++){
+        start_pos[i]= pos;
+    }
+
+    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
+    *ppos= pos;
+    url_fseek(s->pb, pos, SEEK_SET);
+
+//printf("asf_read_pts\n");
+    asf_reset_header(s);
+    for(;;){
+        if (av_read_frame(s, pkt) < 0){
+            av_log(s, AV_LOG_INFO, "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) % asf->packet_size == 0);
+            pos= asf_st->packet_pos;
+
+            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
+            start_pos[i]= asf_st->packet_pos + 1;
+
+            if(pkt->stream_index == stream_index)
+               break;
+        }
+    }
+
+    *ppos= pos;
+//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
+
+    return pts;
+}
+
+static void asf_build_simple_index(AVFormatContext *s, int stream_index)
+{
+    GUID g;
+    ASFContext *asf = s->priv_data;
+    int64_t gsize, itime;
+    int64_t pos, current_pos, index_pts;
+    int i;
+    int pct,ict;
+
+    current_pos = url_ftell(s->pb);
+
+    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
+    get_guid(s->pb, &g);
+    if (!memcmp(&g, &index_guid, sizeof(GUID))) {
+        gsize = get_le64(s->pb);
+        get_guid(s->pb, &g);
+        itime=get_le64(s->pb);
+        pct=get_le32(s->pb);
+        ict=get_le32(s->pb);
+        av_log(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);
+            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
+
+            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
+            index_pts=av_rescale(itime, i, 10000);
+
+            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
+        }
+        asf->index_read= 1;
+    }
+    url_fseek(s->pb, current_pos, SEEK_SET);
+}
+
+static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
+{
+    ASFContext *asf = s->priv_data;
+    AVStream *st = s->streams[stream_index];
+    int64_t pos;
+    int index;
+
+    if (asf->packet_size <= 0)
+        return -1;
+
+    /* 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;
+        pts = st->index_entries[index].timestamp;
+
+    // various attempts to find key frame have failed so far
+    //    asf_reset_header(s);
+    //    url_fseek(s->pb, pos, SEEK_SET);
+    //    key_pos = pos;
+    //     for(i=0;i<16;i++){
+    //         pos = url_ftell(s->pb);
+    //         if (av_read_frame(s, &pkt) < 0){
+    //             av_log(s, AV_LOG_INFO, "seek failed\n");
+    //             return -1;
+    //         }
+    //         asf_st = s->streams[stream_index]->priv_data;
+    //         pos += st->parser->frame_offset;
+    //
+    //         if (pkt.size > b) {
+    //             b = pkt.size;
+    //             key_pos = pos;
+    //         }
+    //
+    //         av_free_packet(&pkt);
+    //     }
+
+        /* do the seek */
+        av_log(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,
+};