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-rw-r--r--libavformat/asf.c1256
1 files changed, 1256 insertions, 0 deletions
diff --git a/libavformat/asf.c b/libavformat/asf.c
new file mode 100644
index 0000000000..2f1ce12dc3
--- /dev/null
+++ b/libavformat/asf.c
@@ -0,0 +1,1256 @@
+/*
+ * ASF compatible encoder and decoder.
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include "avformat.h"
+#include "avi.h"
+#include "mpegaudio.h"
+
+#define PACKET_SIZE 3200
+#define PACKET_HEADER_SIZE 12
+#define FRAME_HEADER_SIZE 17
+
+typedef struct {
+ int num;
+ int seq;
+ /* use for reading */
+ AVPacket pkt;
+ int frag_offset;
+ int timestamp;
+ INT64 duration;
+
+ int ds_span; /* descrambling */
+ int ds_packet_size;
+ int ds_chunk_size;
+ int ds_data_size;
+ int ds_silence_data;
+
+} ASFStream;
+
+typedef struct {
+ UINT32 v1;
+ UINT16 v2;
+ UINT16 v3;
+ UINT8 v4[8];
+} GUID;
+
+typedef struct __attribute__((packed)) {
+ GUID guid; // generated by client computer
+ uint64_t file_size; // in bytes
+ // invalid if broadcasting
+ uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
+ // invalid if broadcasting
+ uint64_t packets_count; // how many packets are there in the file
+ // invalid if broadcasting
+ uint64_t play_time; // play time, in 100-nanosecond units
+ // invalid if broadcasting
+ uint64_t send_time; // time to send file, in 100-nanosecond units
+ // invalid if broadcasting (could be ignored)
+ uint32_t preroll; // timestamp of the first packet, in milliseconds
+ // if nonzero - substract from time
+ uint32_t ignore; // preroll is 64bit - but let's just ignore it
+ uint32_t flags; // 0x01 - broadcast
+ // 0x02 - seekable
+ // rest is reserved should be 0
+ uint32_t min_pktsize; // size of a data packet
+ // invalid if broadcasting
+ uint32_t max_pktsize; // shall be the same as for min_pktsize
+ // invalid if broadcasting
+ uint32_t max_bitrate; // bandwith of stream in bps
+ // should be the sum of bitrates of the
+ // individual media streams
+} ASFMainHeader;
+
+
+typedef struct {
+ int seqno;
+ int packet_size;
+ int is_streamed;
+ int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
+ ASFStream streams[128]; /* it's max number and it's not that big */
+ /* non streamed additonnal info */
+ INT64 nb_packets;
+ INT64 duration; /* in 100ns units */
+ /* packet filling */
+ int packet_size_left;
+ int packet_timestamp_start;
+ int packet_timestamp_end;
+ int packet_nb_frames;
+ UINT8 packet_buf[PACKET_SIZE];
+ ByteIOContext pb;
+ /* only for reading */
+ uint64_t data_offset; /* begining of the first data packet */
+
+ ASFMainHeader hdr;
+
+ int packet_flags;
+ int packet_property;
+ int packet_timestamp;
+ int packet_segsizetype;
+ int packet_segments;
+ int packet_seq;
+ int packet_replic_size;
+ int packet_key_frame;
+ int packet_padsize;
+ int packet_frag_offset;
+ int packet_frag_size;
+ int packet_frag_timestamp;
+ int packet_multi_size;
+ int packet_obj_size;
+ int packet_time_delta;
+ int packet_time_start;
+
+ int stream_index;
+ ASFStream* asf_st; /* currently decoded stream */
+} ASFContext;
+
+static const GUID asf_header = {
+ 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
+};
+
+static const GUID file_header = {
+ 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
+};
+
+static const GUID stream_header = {
+ 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
+};
+
+static const GUID audio_stream = {
+ 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
+};
+
+static const GUID audio_conceal_none = {
+ // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
+ // New value lifted from avifile
+ 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
+};
+
+static const GUID video_stream = {
+ 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
+};
+
+static const GUID video_conceal_none = {
+ 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
+};
+
+
+static const GUID comment_header = {
+ 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
+};
+
+static const GUID codec_comment_header = {
+ 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
+};
+static const GUID codec_comment1_header = {
+ 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
+};
+
+static const GUID data_header = {
+ 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
+};
+
+static const GUID index_guid = {
+ 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
+};
+
+static const GUID head1_guid = {
+ 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
+};
+
+static const GUID head2_guid = {
+ 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
+};
+
+/* I am not a number !!! This GUID is the one found on the PC used to
+ generate the stream */
+static const GUID my_guid = {
+ 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
+};
+
+static void put_guid(ByteIOContext *s, const GUID *g)
+{
+ int i;
+
+ put_le32(s, g->v1);
+ put_le16(s, g->v2);
+ put_le16(s, g->v3);
+ for(i=0;i<8;i++)
+ put_byte(s, g->v4[i]);
+}
+
+static void put_str16(ByteIOContext *s, const char *tag)
+{
+ int c;
+
+ put_le16(s,strlen(tag) + 1);
+ for(;;) {
+ c = (UINT8)*tag++;
+ put_le16(s, c);
+ if (c == '\0')
+ break;
+ }
+}
+
+static void put_str16_nolen(ByteIOContext *s, const char *tag)
+{
+ int c;
+
+ for(;;) {
+ c = (UINT8)*tag++;
+ put_le16(s, c);
+ if (c == '\0')
+ break;
+ }
+}
+
+static INT64 put_header(ByteIOContext *pb, const GUID *g)
+{
+ INT64 pos;
+
+ pos = url_ftell(pb);
+ put_guid(pb, g);
+ put_le64(pb, 24);
+ return pos;
+}
+
+/* update header size */
+static void end_header(ByteIOContext *pb, INT64 pos)
+{
+ INT64 pos1;
+
+ pos1 = url_ftell(pb);
+ url_fseek(pb, pos + 16, SEEK_SET);
+ put_le64(pb, pos1 - pos);
+ url_fseek(pb, pos1, SEEK_SET);
+}
+
+/* write an asf chunk (only used in streaming case) */
+static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
+{
+ ASFContext *asf = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ int length;
+
+ length = payload_length + 8;
+ put_le16(pb, type);
+ put_le16(pb, length);
+ put_le32(pb, asf->seqno);
+ put_le16(pb, flags); /* unknown bytes */
+ put_le16(pb, length);
+ asf->seqno++;
+}
+
+/* convert from unix to windows time */
+static INT64 unix_to_file_time(int ti)
+{
+ INT64 t;
+
+ t = ti * INT64_C(10000000);
+ t += INT64_C(116444736000000000);
+ return t;
+}
+
+/* write the header (used two times if non streamed) */
+static int asf_write_header1(AVFormatContext *s, INT64 file_size, INT64 data_chunk_size)
+{
+ ASFContext *asf = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
+ int has_title;
+ AVCodecContext *enc;
+ INT64 header_offset, cur_pos, hpos;
+ int bit_rate;
+
+ has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
+
+ bit_rate = 0;
+ for(n=0;n<s->nb_streams;n++) {
+ enc = &s->streams[n]->codec;
+
+ bit_rate += enc->bit_rate;
+ }
+
+ if (asf->is_streamed) {
+ put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
+ }
+
+ put_guid(pb, &asf_header);
+ put_le64(pb, -1); /* header length, will be patched after */
+ put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
+ put_byte(pb, 1); /* ??? */
+ put_byte(pb, 2); /* ??? */
+
+ /* file header */
+ header_offset = url_ftell(pb);
+ hpos = put_header(pb, &file_header);
+ put_guid(pb, &my_guid);
+ put_le64(pb, file_size);
+ file_time = 0;
+ put_le64(pb, unix_to_file_time(file_time));
+ put_le64(pb, asf->nb_packets); /* number of packets */
+ put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
+ put_le64(pb, asf->duration); /* duration (in 100ns units) */
+ put_le32(pb, 0); /* start time stamp */
+ put_le32(pb, 0); /* ??? */
+ put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
+ put_le32(pb, asf->packet_size); /* packet size */
+ put_le32(pb, asf->packet_size); /* packet size */
+ put_le32(pb, bit_rate); /* Nominal data rate in bps */
+ end_header(pb, hpos);
+
+ /* unknown headers */
+ hpos = put_header(pb, &head1_guid);
+ put_guid(pb, &head2_guid);
+ put_le32(pb, 6);
+ put_le16(pb, 0);
+ end_header(pb, hpos);
+
+ /* title and other infos */
+ if (has_title) {
+ hpos = put_header(pb, &comment_header);
+ put_le16(pb, 2 * (strlen(s->title) + 1));
+ put_le16(pb, 2 * (strlen(s->author) + 1));
+ put_le16(pb, 2 * (strlen(s->copyright) + 1));
+ put_le16(pb, 2 * (strlen(s->comment) + 1));
+ put_le16(pb, 0);
+ put_str16_nolen(pb, s->title);
+ put_str16_nolen(pb, s->author);
+ put_str16_nolen(pb, s->copyright);
+ put_str16_nolen(pb, s->comment);
+ end_header(pb, hpos);
+ }
+
+ /* stream headers */
+ for(n=0;n<s->nb_streams;n++) {
+ INT64 es_pos;
+ // ASFStream *stream = &asf->streams[n];
+
+ enc = &s->streams[n]->codec;
+ asf->streams[n].num = n + 1;
+ asf->streams[n].seq = 0;
+
+ switch(enc->codec_type) {
+ case CODEC_TYPE_AUDIO:
+ wav_extra_size = 0;
+ extra_size = 18 + wav_extra_size;
+ extra_size2 = 0;
+ break;
+ default:
+ case CODEC_TYPE_VIDEO:
+ wav_extra_size = 0;
+ extra_size = 0x33;
+ extra_size2 = 0;
+ break;
+ }
+
+ hpos = put_header(pb, &stream_header);
+ if (enc->codec_type == CODEC_TYPE_AUDIO) {
+ put_guid(pb, &audio_stream);
+ put_guid(pb, &audio_conceal_none);
+ } else {
+ put_guid(pb, &video_stream);
+ put_guid(pb, &video_conceal_none);
+ }
+ put_le64(pb, 0); /* ??? */
+ es_pos = url_ftell(pb);
+ put_le32(pb, extra_size); /* wav header len */
+ put_le32(pb, extra_size2); /* additional data len */
+ put_le16(pb, n + 1); /* stream number */
+ put_le32(pb, 0); /* ??? */
+
+ if (enc->codec_type == CODEC_TYPE_AUDIO) {
+ /* WAVEFORMATEX header */
+ int wavsize = put_wav_header(pb, enc);
+
+ if (wavsize < 0)
+ return -1;
+ if (wavsize != extra_size) {
+ cur_pos = url_ftell(pb);
+ url_fseek(pb, es_pos, SEEK_SET);
+ put_le32(pb, wavsize); /* wav header len */
+ url_fseek(pb, cur_pos, SEEK_SET);
+ }
+ } else {
+ put_le32(pb, enc->width);
+ put_le32(pb, enc->height);
+ put_byte(pb, 2); /* ??? */
+ put_le16(pb, 40); /* size */
+
+ /* BITMAPINFOHEADER header */
+ put_bmp_header(pb, enc, codec_bmp_tags, 1);
+ }
+ end_header(pb, hpos);
+ }
+
+ /* media comments */
+
+ hpos = put_header(pb, &codec_comment_header);
+ put_guid(pb, &codec_comment1_header);
+ put_le32(pb, s->nb_streams);
+ for(n=0;n<s->nb_streams;n++) {
+ AVCodec *p;
+
+ enc = &s->streams[n]->codec;
+ p = avcodec_find_encoder(enc->codec_id);
+
+ put_le16(pb, asf->streams[n].num);
+ put_str16(pb, p ? p->name : enc->codec_name);
+ put_le16(pb, 0); /* no parameters */
+ /* id */
+ if (enc->codec_type == CODEC_TYPE_AUDIO) {
+ put_le16(pb, 2);
+ put_le16(pb, codec_get_tag(codec_wav_tags, enc->codec_id));
+ } else {
+ put_le16(pb, 4);
+ put_le32(pb, codec_get_tag(codec_bmp_tags, enc->codec_id));
+ }
+ }
+ end_header(pb, hpos);
+
+ /* patch the header size fields */
+
+ cur_pos = url_ftell(pb);
+ header_size = cur_pos - header_offset;
+ if (asf->is_streamed) {
+ header_size += 8 + 30 + 50;
+
+ url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
+ put_le16(pb, header_size);
+ url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
+ put_le16(pb, header_size);
+
+ header_size -= 8 + 30 + 50;
+ }
+ header_size += 24 + 6;
+ url_fseek(pb, header_offset - 14, SEEK_SET);
+ put_le64(pb, header_size);
+ url_fseek(pb, cur_pos, SEEK_SET);
+
+ /* movie chunk, followed by packets of packet_size */
+ asf->data_offset = cur_pos;
+ put_guid(pb, &data_header);
+ put_le64(pb, data_chunk_size);
+ put_guid(pb, &my_guid);
+ put_le64(pb, asf->nb_packets); /* nb packets */
+ put_byte(pb, 1); /* ??? */
+ put_byte(pb, 1); /* ??? */
+ return 0;
+}
+
+static int asf_write_header(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+
+ av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
+
+ asf->packet_size = PACKET_SIZE;
+ asf->nb_packets = 0;
+
+ if (asf_write_header1(s, 0, 50) < 0) {
+ //av_free(asf);
+ return -1;
+ }
+
+ put_flush_packet(&s->pb);
+
+ asf->packet_nb_frames = 0;
+ asf->packet_timestamp_start = -1;
+ asf->packet_timestamp_end = -1;
+ asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
+ init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
+ NULL, NULL, NULL, NULL);
+
+ return 0;
+}
+
+static int asf_write_stream_header(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+
+ asf->is_streamed = 1;
+
+ return asf_write_header(s);
+}
+
+/* write a fixed size packet */
+static int put_packet(AVFormatContext *s,
+ unsigned int timestamp, unsigned int duration,
+ int nb_frames, int padsize)
+{
+ ASFContext *asf = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ int flags;
+
+ if (asf->is_streamed) {
+ put_chunk(s, 0x4424, asf->packet_size, 0);
+ }
+
+ put_byte(pb, 0x82);
+ put_le16(pb, 0);
+
+ flags = 0x01; /* nb segments present */
+ if (padsize > 0) {
+ if (padsize < 256)
+ flags |= 0x08;
+ else
+ flags |= 0x10;
+ }
+ put_byte(pb, flags); /* flags */
+ put_byte(pb, 0x5d);
+ if (flags & 0x10)
+ put_le16(pb, padsize - 2);
+ if (flags & 0x08)
+ put_byte(pb, padsize - 1);
+ put_le32(pb, timestamp);
+ put_le16(pb, duration);
+ put_byte(pb, nb_frames | 0x80);
+
+ return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
+}
+
+static void flush_packet(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ int hdr_size, ptr;
+
+ hdr_size = put_packet(s, asf->packet_timestamp_start,
+ asf->packet_timestamp_end - asf->packet_timestamp_start,
+ asf->packet_nb_frames, asf->packet_size_left);
+
+ /* Clear out the padding bytes */
+ ptr = asf->packet_size - hdr_size - asf->packet_size_left;
+ memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
+
+ put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
+
+ put_flush_packet(&s->pb);
+ asf->nb_packets++;
+ asf->packet_nb_frames = 0;
+ asf->packet_timestamp_start = -1;
+ asf->packet_timestamp_end = -1;
+ asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
+ init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
+ NULL, NULL, NULL, NULL);
+}
+
+static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
+ int payload_size, int frag_offset, int frag_len)
+{
+ ASFContext *asf = s->priv_data;
+ ByteIOContext *pb = &asf->pb;
+ int val;
+
+ val = stream->num;
+ if (s->streams[val - 1]->codec.key_frame /* && frag_offset == 0 */)
+ val |= 0x80;
+ put_byte(pb, val);
+ put_byte(pb, stream->seq);
+ put_le32(pb, frag_offset); /* fragment offset */
+ put_byte(pb, 0x08); /* flags */
+ put_le32(pb, payload_size);
+ put_le32(pb, timestamp);
+ put_le16(pb, frag_len);
+}
+
+
+/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
+
+ It is there that you understand that the ASF format is really
+ crap. They have misread the MPEG Systems spec !
+ */
+static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
+ UINT8 *buf, int payload_size)
+{
+ ASFContext *asf = s->priv_data;
+ int frag_pos, frag_len, frag_len1;
+
+ frag_pos = 0;
+ while (frag_pos < payload_size) {
+ frag_len = payload_size - frag_pos;
+ frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
+ if (frag_len1 > 0) {
+ if (frag_len > frag_len1)
+ frag_len = frag_len1;
+ put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
+ put_buffer(&asf->pb, buf, frag_len);
+ asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
+ asf->packet_timestamp_end = timestamp;
+ if (asf->packet_timestamp_start == -1)
+ asf->packet_timestamp_start = timestamp;
+ asf->packet_nb_frames++;
+ } else {
+ frag_len = 0;
+ }
+ frag_pos += frag_len;
+ buf += frag_len;
+ /* output the frame if filled */
+ if (asf->packet_size_left <= FRAME_HEADER_SIZE)
+ flush_packet(s);
+ }
+ stream->seq++;
+}
+
+
+static int asf_write_packet(AVFormatContext *s, int stream_index,
+ UINT8 *buf, int size, int timestamp)
+{
+ ASFContext *asf = s->priv_data;
+ ASFStream *stream;
+ INT64 duration;
+ AVCodecContext *codec;
+
+ codec = &s->streams[stream_index]->codec;
+ stream = &asf->streams[stream_index];
+
+ if (codec->codec_type == CODEC_TYPE_AUDIO) {
+ duration = (codec->frame_number * codec->frame_size * INT64_C(10000000)) /
+ codec->sample_rate;
+ } else {
+ duration = codec->frame_number *
+ ((INT64_C(10000000) * FRAME_RATE_BASE) / codec->frame_rate);
+ }
+ if (duration > asf->duration)
+ asf->duration = duration;
+
+ put_frame(s, stream, timestamp, buf, size);
+ return 0;
+}
+
+static int asf_write_trailer(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ INT64 file_size;
+
+ /* flush the current packet */
+ if (asf->pb.buf_ptr > asf->pb.buffer)
+ flush_packet(s);
+
+ if (asf->is_streamed) {
+ put_chunk(s, 0x4524, 0, 0); /* end of stream */
+ } else {
+ /* rewrite an updated header */
+ file_size = url_ftell(&s->pb);
+ url_fseek(&s->pb, 0, SEEK_SET);
+ asf_write_header1(s, file_size, file_size - asf->data_offset);
+ }
+
+ put_flush_packet(&s->pb);
+ return 0;
+}
+
+/**********************************/
+/* decoding */
+
+//#define DEBUG
+
+#ifdef DEBUG
+static void print_guid(const GUID *g)
+{
+ int i;
+ printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
+ for(i=0;i<8;i++)
+ printf(" 0x%02x,", g->v4[i]);
+ printf("}\n");
+}
+#endif
+
+static void get_guid(ByteIOContext *s, GUID *g)
+{
+ int i;
+
+ g->v1 = get_le32(s);
+ g->v2 = get_le16(s);
+ g->v3 = get_le16(s);
+ for(i=0;i<8;i++)
+ g->v4[i] = get_byte(s);
+}
+
+#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)
+{
+ int c;
+ char *q;
+
+ q = buf;
+ while (len > 0) {
+ c = get_le16(pb);
+ if ((q - buf) < buf_size - 1)
+ *q++ = c;
+ len-=2;
+ }
+ *q = '\0';
+}
+
+static int asf_probe(AVProbeData *pd)
+{
+ GUID g;
+ const unsigned char *p;
+ int i;
+
+ /* check file header */
+ if (pd->buf_size <= 32)
+ return 0;
+ p = pd->buf;
+ g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
+ p += 4;
+ g.v2 = p[0] | (p[1] << 8);
+ p += 2;
+ g.v3 = p[0] | (p[1] << 8);
+ p += 2;
+ for(i=0;i<8;i++)
+ g.v4[i] = *p++;
+
+ if (!memcmp(&g, &asf_header, sizeof(GUID)))
+ return AVPROBE_SCORE_MAX;
+ else
+ return 0;
+}
+
+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 gsize;
+
+ av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
+
+ get_guid(pb, &g);
+ if (memcmp(&g, &asf_header, sizeof(GUID)))
+ goto fail;
+ 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);
+#ifdef DEBUG
+ printf("%08Lx: ", url_ftell(pb) - 24);
+ print_guid(&g);
+ printf(" size=0x%Lx\n", gsize);
+#endif
+ if (gsize < 24)
+ goto fail;
+ 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->hdr.packets_count = 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;
+ asf->nb_packets = asf->hdr.packets_count;
+ } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
+ int type, total_size;
+ unsigned int tag1;
+ INT64 pos1, pos2;
+
+ pos1 = url_ftell(pb);
+
+ st = av_mallocz(sizeof(AVStream));
+ if (!st)
+ goto fail;
+ s->streams[s->nb_streams] = st;
+ asf_st = av_mallocz(sizeof(ASFStream));
+ if (!asf_st)
+ goto fail;
+ st->priv_data = asf_st;
+ st->time_length = (asf->hdr.send_time - asf->hdr.preroll) / 10; // us
+ get_guid(pb, &g);
+ if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
+ type = CODEC_TYPE_AUDIO;
+ } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
+ type = CODEC_TYPE_VIDEO;
+ } else {
+ goto fail;
+ }
+ get_guid(pb, &g);
+ total_size = get_le64(pb);
+ 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++;
+
+ get_le32(pb);
+ st->codec.codec_type = type;
+ st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
+ if (type == CODEC_TYPE_AUDIO) {
+ get_wav_header(pb, &st->codec, 1);
+ /* 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);
+ asf_st->ds_data_size = get_le16(pb);
+ asf_st->ds_silence_data = get_byte(pb);
+ }
+ //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_span = 0; // disable descrambling
+ }
+ switch (st->codec.codec_id) {
+ case CODEC_ID_MP3LAME:
+ 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 {
+ get_le32(pb);
+ get_le32(pb);
+ get_byte(pb);
+ size = get_le16(pb); /* size */
+ get_le32(pb); /* size */
+ st->codec.width = get_le32(pb);
+ st->codec.height = get_le32(pb);
+ /* not available for asf */
+ get_le16(pb); /* panes */
+ get_le16(pb); /* depth */
+ tag1 = get_le32(pb);
+ url_fskip(pb, 20);
+ if (size > 40) {
+ st->codec.extradata_size = size - 40;
+ st->codec.extradata = av_mallocz(st->codec.extradata_size);
+ get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
+ }
+ st->codec.codec_tag = st->codec.fourcc = tag1;
+ st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
+ }
+ pos2 = url_ftell(pb);
+ url_fskip(pb, gsize - (pos2 - pos1 + 24));
+ } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
+ break;
+ } 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_str16_nolen(pb, len1, s->title, sizeof(s->title));
+ get_str16_nolen(pb, len2, s->author, sizeof(s->author));
+ get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
+ get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
+ url_fskip(pb, len5);
+#if 0
+ } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
+ int v1, v2;
+ get_guid(pb, &g);
+ v1 = get_le32(pb);
+ v2 = get_le16(pb);
+ } 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)) {
+ goto fail;
+ } 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))
+ goto fail;
+ asf->data_offset = url_ftell(pb);
+ asf->packet_size_left = 0;
+
+ return 0;
+
+ fail:
+ for(i=0;i<s->nb_streams;i++) {
+ AVStream *st = s->streams[i];
+ if (st) {
+ av_free(st->priv_data);
+ av_free(st->codec.extradata);
+ }
+ av_free(st);
+ }
+ return -1;
+}
+
+#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; \
+ }
+
+static int asf_get_packet(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ uint32_t packet_length, padsize;
+ int rsize = 11;
+ int c = get_byte(pb);
+ if (c != 0x82) {
+ if (!url_feof(pb))
+ printf("ff asf bad header %x at:%Ld\n", c, url_ftell(pb));
+ return -EIO;
+ }
+ if ((c & 0x0f) == 2) { // always true for now
+ if (get_le16(pb) != 0) {
+ if (!url_feof(pb))
+ printf("ff asf bad non zero\n");
+ return -EIO;
+ }
+ }
+
+ asf->packet_flags = get_byte(pb);
+ asf->packet_property = get_byte(pb);
+
+ 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
+
+ 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;
+#ifdef DEBUG
+ printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
+#endif
+ return 0;
+}
+
+static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ ASFContext *asf = s->priv_data;
+ ASFStream *asf_st = 0;
+ ByteIOContext *pb = &s->pb;
+ //static int pc = 0;
+ for (;;) {
+ int rsize = 0;
+ 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:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
+ /* fail safe */
+ url_fskip(pb, ret);
+ ret = asf_get_packet(s);
+ //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
+ if (ret < 0 || url_feof(pb))
+ return -EIO;
+ asf->packet_time_start = 0;
+ continue;
+ }
+ if (asf->packet_time_start == 0) {
+ /* read frame header */
+ int num = get_byte(pb);
+ asf->packet_segments--;
+ rsize++;
+ asf->packet_key_frame = (num & 0x80) >> 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);
+
+ if (asf->packet_replic_size > 1) {
+ // it should be always at least 8 bytes - FIXME validate
+ asf->packet_obj_size = get_le32(pb);
+ asf->packet_frag_timestamp = get_le32(pb); // timestamp
+ if (asf->packet_replic_size > 8)
+ url_fskip(pb, asf->packet_replic_size - 8);
+ rsize += asf->packet_replic_size; // FIXME - check validity
+ } else {
+ // multipacket - frag_offset is begining timestamp
+ asf->packet_time_start = asf->packet_frag_offset;
+ asf->packet_frag_offset = 0;
+ asf->packet_frag_timestamp = asf->packet_timestamp;
+
+ if (asf->packet_replic_size == 1) {
+ asf->packet_time_delta = get_byte(pb);
+ rsize++;
+ }
+ }
+ if (asf->packet_flags & 0x01) {
+ DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
+#undef DO_2BITS
+ //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) {
+ asf->packet_segments = 0;
+ continue;
+ }
+ }
+ asf->packet_size_left -= rsize;
+ //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
+
+ if (asf->stream_index < 0) {
+ 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;
+ printf("ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
+ continue;
+ }
+ asf->asf_st = s->streams[asf->stream_index]->priv_data;
+ }
+ asf_st = asf->asf_st;
+
+ if ((asf->packet_frag_offset != asf_st->frag_offset
+ || (asf->packet_frag_offset
+ && asf->packet_seq != asf_st->seq)) // seq should be ignored
+ ) {
+ /* cannot continue current packet: free it */
+ // FIXME better check if packet was already allocated
+ printf("ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
+ asf_st->pkt.size,
+ asf->packet_obj_size,
+ asf->packet_frag_offset, asf_st->frag_offset,
+ asf->packet_seq, asf_st->seq, asf->packet_frag_size);
+ if (asf_st->pkt.size)
+ av_free_packet(&asf_st->pkt);
+ asf_st->frag_offset = 0;
+ if (asf->packet_frag_offset != 0) {
+ url_fskip(pb, asf->packet_frag_size);
+ printf("ff asf parser skiping %db\n", asf->packet_frag_size);
+ asf->packet_size_left -= asf->packet_frag_size;
+ continue;
+ }
+ }
+ if (asf->packet_replic_size == 1) {
+ // frag_offset is here used as the begining 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_st->frag_offset == 0) {
+ /* new packet */
+ av_new_packet(&asf_st->pkt, asf->packet_obj_size);
+ asf_st->seq = asf->packet_seq;
+ asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
+ asf_st->pkt.stream_index = asf->stream_index;
+ 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;
+ get_buffer(pb, 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) {
+ /* return packet */
+ if (asf_st->ds_span > 1) {
+ /* packet descrambling */
+ char* 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);
+ 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;
+ memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
+ //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_close(AVFormatContext *s)
+{
+ int i;
+
+ for(i=0;i<s->nb_streams;i++) {
+ AVStream *st = s->streams[i];
+ av_free(st->priv_data);
+ av_free(st->codec.extradata);
+ }
+ return 0;
+}
+
+static int asf_read_seek(AVFormatContext *s, int64_t pts)
+{
+ printf("SEEK TO %Ld", pts);
+ return -1;
+}
+
+static AVInputFormat asf_iformat = {
+ "asf",
+ "asf format",
+ sizeof(ASFContext),
+ asf_probe,
+ asf_read_header,
+ asf_read_packet,
+ asf_read_close,
+ asf_read_seek,
+};
+
+static AVOutputFormat asf_oformat = {
+ "asf",
+ "asf format",
+ "application/octet-stream",
+ "asf,wmv",
+ sizeof(ASFContext),
+#ifdef CONFIG_MP3LAME
+ CODEC_ID_MP3LAME,
+#else
+ CODEC_ID_MP2,
+#endif
+ CODEC_ID_MSMPEG4V3,
+ asf_write_header,
+ asf_write_packet,
+ asf_write_trailer,
+};
+
+static AVOutputFormat asf_stream_oformat = {
+ "asf_stream",
+ "asf format",
+ "application/octet-stream",
+ "asf,wmv",
+ sizeof(ASFContext),
+#ifdef CONFIG_MP3LAME
+ CODEC_ID_MP3LAME,
+#else
+ CODEC_ID_MP2,
+#endif
+ CODEC_ID_MSMPEG4V3,
+ asf_write_stream_header,
+ asf_write_packet,
+ asf_write_trailer,
+};
+
+int asf_init(void)
+{
+ av_register_input_format(&asf_iformat);
+ av_register_output_format(&asf_oformat);
+ av_register_output_format(&asf_stream_oformat);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-18 14:02:49 +0000