-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 },
-};
-
-static const GUID extended_content_header = {
- 0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },
-};
-
-/* 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 },
-};
-
-#ifdef CONFIG_ENCODERS
-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_t)*tag++;
- put_le16(s, c);
- if (c == '\0')
- break;
- }
-}
-
-static void put_str16_nolen(ByteIOContext *s, const char *tag)
-{
- int c;
-
- for(;;) {
- c = (uint8_t)*tag++;
- put_le16(s, c);
- if (c == '\0')
- break;
- }
-}
-
-static int64_t put_header(ByteIOContext *pb, const GUID *g)
-{
- int64_t 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_t pos)
-{
- int64_t 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_t unix_to_file_time(int ti)
-{
- int64_t t;
-
- t = ti * int64_t_C(10000000);
- t += int64_t_C(116444736000000000);
- return t;
-}
-
-/* write the header (used two times if non streamed) */
-static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t 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_t 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_t 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);
- if(!enc->codec_tag)
- enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
- if(!enc->codec_tag)
- return -1;
- put_le16(pb, enc->codec_tag);
- } else {
- put_le16(pb, 4);
- if(!enc->codec_tag)
- enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
- if(!enc->codec_tag)
- return -1;
- put_le32(pb, enc->codec_tag);
- }
- }
- 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.coded_frame->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,
- const uint8_t *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,
- const uint8_t *buf, int size, int64_t timestamp)
-{
- ASFContext *asf = s->priv_data;
- ASFStream *stream;
- int64_t 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_t_C(10000000)) /
- codec->sample_rate;
- } else {
- duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, 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_t 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;
-}
-#endif //CONFIG_ENCODERS
-